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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
072b91f9 BK |
2 | /* |
3 | * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter | |
4 | * | |
5 | * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation | |
6 | * | |
7 | * Copyright (C) IBM Corporation, 2008 | |
072b91f9 BK |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/moduleparam.h> | |
12 | #include <linux/dma-mapping.h> | |
13 | #include <linux/dmapool.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/interrupt.h> | |
5951be4c | 16 | #include <linux/irqdomain.h> |
072b91f9 | 17 | #include <linux/kthread.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
072b91f9 | 19 | #include <linux/of.h> |
b0f4d4cf | 20 | #include <linux/pm.h> |
072b91f9 | 21 | #include <linux/stringify.h> |
75cc8cfc | 22 | #include <linux/bsg-lib.h> |
072b91f9 BK |
23 | #include <asm/firmware.h> |
24 | #include <asm/irq.h> | |
0217a272 | 25 | #include <asm/rtas.h> |
072b91f9 BK |
26 | #include <asm/vio.h> |
27 | #include <scsi/scsi.h> | |
28 | #include <scsi/scsi_cmnd.h> | |
29 | #include <scsi/scsi_host.h> | |
30 | #include <scsi/scsi_device.h> | |
31 | #include <scsi/scsi_tcq.h> | |
32 | #include <scsi/scsi_transport_fc.h> | |
d31429e1 | 33 | #include <scsi/scsi_bsg_fc.h> |
072b91f9 BK |
34 | #include "ibmvfc.h" |
35 | ||
36 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; | |
37 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; | |
1abf635d | 38 | static u64 max_lun = IBMVFC_MAX_LUN; |
072b91f9 BK |
39 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; |
40 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; | |
41 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; | |
072b91f9 BK |
42 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; |
43 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; | |
a6104b1e | 44 | static unsigned int cls3_error = IBMVFC_CLS3_ERROR; |
032d1900 TD |
45 | static unsigned int mq_enabled = IBMVFC_MQ; |
46 | static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; | |
47 | static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; | |
48 | static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; | |
49 | static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; | |
50 | ||
072b91f9 BK |
51 | static LIST_HEAD(ibmvfc_head); |
52 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); | |
53 | static struct scsi_transport_template *ibmvfc_transport_template; | |
54 | ||
55 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); | |
56 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); | |
57 | MODULE_LICENSE("GPL"); | |
58 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); | |
59 | ||
032d1900 TD |
60 | module_param_named(mq, mq_enabled, uint, S_IRUGO); |
61 | MODULE_PARM_DESC(mq, "Enable multiqueue support. " | |
62 | "[Default=" __stringify(IBMVFC_MQ) "]"); | |
63 | module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); | |
64 | MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " | |
65 | "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); | |
66 | module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); | |
67 | MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " | |
68 | "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); | |
69 | module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); | |
70 | MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " | |
71 | "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); | |
72 | module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); | |
73 | MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " | |
74 | "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); | |
75 | ||
072b91f9 BK |
76 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); |
77 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " | |
78 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); | |
79 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); | |
80 | MODULE_PARM_DESC(default_timeout, | |
81 | "Default timeout in seconds for initialization and EH commands. " | |
82 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); | |
83 | module_param_named(max_requests, max_requests, uint, S_IRUGO); | |
84 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " | |
85 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); | |
1abf635d | 86 | module_param_named(max_lun, max_lun, ullong, S_IRUGO); |
072b91f9 BK |
87 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " |
88 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); | |
89 | module_param_named(max_targets, max_targets, uint, S_IRUGO); | |
90 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " | |
91 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); | |
545ef9a2 | 92 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO); |
072b91f9 BK |
93 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
94 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); | |
95 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); | |
96 | MODULE_PARM_DESC(debug, "Enable driver debug information. " | |
97 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); | |
072b91f9 BK |
98 | module_param_named(log_level, log_level, uint, 0); |
99 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " | |
100 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); | |
a6104b1e | 101 | module_param_named(cls3_error, cls3_error, uint, 0); |
6c46301f | 102 | MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " |
a6104b1e | 103 | "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); |
072b91f9 BK |
104 | |
105 | static const struct { | |
106 | u16 status; | |
107 | u16 error; | |
108 | u8 result; | |
109 | u8 retry; | |
110 | int log; | |
111 | char *name; | |
112 | } cmd_status [] = { | |
113 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, | |
114 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, | |
115 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, | |
752b3232 | 116 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
072b91f9 BK |
117 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
118 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, | |
119 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, | |
120 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, | |
121 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, | |
122 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, | |
123 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, | |
124 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, | |
497f9c50 | 125 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, |
072b91f9 BK |
126 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
127 | ||
128 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, | |
129 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, | |
752b3232 BK |
130 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
131 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, | |
072b91f9 | 132 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
752b3232 BK |
133 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
134 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, | |
072b91f9 | 135 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
646d3857 | 136 | { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
072b91f9 BK |
137 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
138 | ||
139 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, | |
140 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, | |
141 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, | |
142 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, | |
143 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, | |
144 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, | |
145 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, | |
146 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, | |
147 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, | |
148 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, | |
149 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, | |
150 | ||
151 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, | |
95237c25 | 152 | { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, |
072b91f9 BK |
153 | }; |
154 | ||
155 | static void ibmvfc_npiv_login(struct ibmvfc_host *); | |
156 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); | |
157 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); | |
158 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); | |
79111d08 | 159 | static void ibmvfc_npiv_logout(struct ibmvfc_host *); |
ed830385 | 160 | static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); |
4b29cb61 | 161 | static void ibmvfc_tgt_move_login(struct ibmvfc_target *); |
072b91f9 | 162 | |
5cf52964 TD |
163 | static void ibmvfc_release_sub_crqs(struct ibmvfc_host *); |
164 | static void ibmvfc_init_sub_crqs(struct ibmvfc_host *); | |
165 | ||
072b91f9 BK |
166 | static const char *unknown_error = "unknown error"; |
167 | ||
9e6b6b81 TD |
168 | static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, |
169 | unsigned long length, unsigned long *cookie, | |
170 | unsigned long *irq) | |
171 | { | |
172 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; | |
173 | long rc; | |
174 | ||
175 | rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); | |
176 | *cookie = retbuf[0]; | |
177 | *irq = retbuf[1]; | |
178 | ||
179 | return rc; | |
180 | } | |
181 | ||
a318c2b7 TD |
182 | static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) |
183 | { | |
184 | u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); | |
185 | ||
186 | return (host_caps & cap_flags) ? 1 : 0; | |
187 | } | |
188 | ||
5a9d16f7 TD |
189 | static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, |
190 | struct ibmvfc_cmd *vfc_cmd) | |
191 | { | |
192 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) | |
193 | return &vfc_cmd->v2.iu; | |
194 | else | |
195 | return &vfc_cmd->v1.iu; | |
196 | } | |
197 | ||
198 | static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, | |
199 | struct ibmvfc_cmd *vfc_cmd) | |
200 | { | |
201 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) | |
202 | return &vfc_cmd->v2.rsp; | |
203 | else | |
204 | return &vfc_cmd->v1.rsp; | |
205 | } | |
206 | ||
072b91f9 BK |
207 | #ifdef CONFIG_SCSI_IBMVFC_TRACE |
208 | /** | |
209 | * ibmvfc_trc_start - Log a start trace entry | |
210 | * @evt: ibmvfc event struct | |
211 | * | |
212 | **/ | |
213 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) | |
214 | { | |
215 | struct ibmvfc_host *vhost = evt->vhost; | |
216 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; | |
217 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; | |
5a9d16f7 | 218 | struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
072b91f9 | 219 | struct ibmvfc_trace_entry *entry; |
57e80e0b | 220 | int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; |
072b91f9 | 221 | |
57e80e0b | 222 | entry = &vhost->trace[index]; |
072b91f9 BK |
223 | entry->evt = evt; |
224 | entry->time = jiffies; | |
225 | entry->fmt = evt->crq.format; | |
226 | entry->type = IBMVFC_TRC_START; | |
227 | ||
228 | switch (entry->fmt) { | |
229 | case IBMVFC_CMD_FORMAT: | |
c16b8a6d | 230 | entry->op_code = iu->cdb[0]; |
0aab6c3f | 231 | entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
c16b8a6d TD |
232 | entry->lun = scsilun_to_int(&iu->lun); |
233 | entry->tmf_flags = iu->tmf_flags; | |
234 | entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); | |
072b91f9 BK |
235 | break; |
236 | case IBMVFC_MAD_FORMAT: | |
0aab6c3f | 237 | entry->op_code = be32_to_cpu(mad->opcode); |
072b91f9 BK |
238 | break; |
239 | default: | |
240 | break; | |
f36cfe6a | 241 | } |
072b91f9 BK |
242 | } |
243 | ||
244 | /** | |
245 | * ibmvfc_trc_end - Log an end trace entry | |
246 | * @evt: ibmvfc event struct | |
247 | * | |
248 | **/ | |
249 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) | |
250 | { | |
251 | struct ibmvfc_host *vhost = evt->vhost; | |
252 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
253 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; | |
5a9d16f7 TD |
254 | struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
255 | struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); | |
57e80e0b TD |
256 | struct ibmvfc_trace_entry *entry; |
257 | int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; | |
072b91f9 | 258 | |
57e80e0b | 259 | entry = &vhost->trace[index]; |
072b91f9 BK |
260 | entry->evt = evt; |
261 | entry->time = jiffies; | |
262 | entry->fmt = evt->crq.format; | |
263 | entry->type = IBMVFC_TRC_END; | |
264 | ||
265 | switch (entry->fmt) { | |
266 | case IBMVFC_CMD_FORMAT: | |
c16b8a6d | 267 | entry->op_code = iu->cdb[0]; |
0aab6c3f | 268 | entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
c16b8a6d TD |
269 | entry->lun = scsilun_to_int(&iu->lun); |
270 | entry->tmf_flags = iu->tmf_flags; | |
0aab6c3f TD |
271 | entry->u.end.status = be16_to_cpu(vfc_cmd->status); |
272 | entry->u.end.error = be16_to_cpu(vfc_cmd->error); | |
c16b8a6d TD |
273 | entry->u.end.fcp_rsp_flags = rsp->flags; |
274 | entry->u.end.rsp_code = rsp->data.info.rsp_code; | |
275 | entry->u.end.scsi_status = rsp->scsi_status; | |
072b91f9 BK |
276 | break; |
277 | case IBMVFC_MAD_FORMAT: | |
0aab6c3f TD |
278 | entry->op_code = be32_to_cpu(mad->opcode); |
279 | entry->u.end.status = be16_to_cpu(mad->status); | |
072b91f9 BK |
280 | break; |
281 | default: | |
282 | break; | |
283 | ||
f36cfe6a | 284 | } |
072b91f9 BK |
285 | } |
286 | ||
287 | #else | |
288 | #define ibmvfc_trc_start(evt) do { } while (0) | |
289 | #define ibmvfc_trc_end(evt) do { } while (0) | |
290 | #endif | |
291 | ||
292 | /** | |
293 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response | |
294 | * @status: status / error class | |
295 | * @error: error | |
296 | * | |
297 | * Return value: | |
298 | * index into cmd_status / -EINVAL on failure | |
299 | **/ | |
300 | static int ibmvfc_get_err_index(u16 status, u16 error) | |
301 | { | |
302 | int i; | |
303 | ||
304 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) | |
305 | if ((cmd_status[i].status & status) == cmd_status[i].status && | |
306 | cmd_status[i].error == error) | |
307 | return i; | |
308 | ||
309 | return -EINVAL; | |
310 | } | |
311 | ||
312 | /** | |
313 | * ibmvfc_get_cmd_error - Find the error description for the fcp response | |
314 | * @status: status / error class | |
315 | * @error: error | |
316 | * | |
317 | * Return value: | |
318 | * error description string | |
319 | **/ | |
320 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) | |
321 | { | |
322 | int rc = ibmvfc_get_err_index(status, error); | |
323 | if (rc >= 0) | |
324 | return cmd_status[rc].name; | |
325 | return unknown_error; | |
326 | } | |
327 | ||
328 | /** | |
329 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response | |
dd9c7729 | 330 | * @vhost: ibmvfc host struct |
072b91f9 BK |
331 | * @vfc_cmd: ibmvfc command struct |
332 | * | |
333 | * Return value: | |
334 | * SCSI result value to return for completed command | |
335 | **/ | |
5a9d16f7 | 336 | static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) |
072b91f9 BK |
337 | { |
338 | int err; | |
5a9d16f7 | 339 | struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); |
0aab6c3f | 340 | int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
072b91f9 BK |
341 | |
342 | if ((rsp->flags & FCP_RSP_LEN_VALID) && | |
4a2837d4 | 343 | ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
072b91f9 BK |
344 | rsp->data.info.rsp_code)) |
345 | return DID_ERROR << 16; | |
346 | ||
0aab6c3f | 347 | err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
072b91f9 BK |
348 | if (err >= 0) |
349 | return rsp->scsi_status | (cmd_status[err].result << 16); | |
350 | return rsp->scsi_status | (DID_ERROR << 16); | |
351 | } | |
352 | ||
353 | /** | |
354 | * ibmvfc_retry_cmd - Determine if error status is retryable | |
355 | * @status: status / error class | |
356 | * @error: error | |
357 | * | |
358 | * Return value: | |
359 | * 1 if error should be retried / 0 if it should not | |
360 | **/ | |
361 | static int ibmvfc_retry_cmd(u16 status, u16 error) | |
362 | { | |
363 | int rc = ibmvfc_get_err_index(status, error); | |
364 | ||
365 | if (rc >= 0) | |
366 | return cmd_status[rc].retry; | |
367 | return 1; | |
368 | } | |
369 | ||
370 | static const char *unknown_fc_explain = "unknown fc explain"; | |
371 | ||
372 | static const struct { | |
373 | u16 fc_explain; | |
374 | char *name; | |
375 | } ls_explain [] = { | |
376 | { 0x00, "no additional explanation" }, | |
377 | { 0x01, "service parameter error - options" }, | |
378 | { 0x03, "service parameter error - initiator control" }, | |
379 | { 0x05, "service parameter error - recipient control" }, | |
380 | { 0x07, "service parameter error - received data field size" }, | |
381 | { 0x09, "service parameter error - concurrent seq" }, | |
382 | { 0x0B, "service parameter error - credit" }, | |
383 | { 0x0D, "invalid N_Port/F_Port_Name" }, | |
384 | { 0x0E, "invalid node/Fabric Name" }, | |
385 | { 0x0F, "invalid common service parameters" }, | |
386 | { 0x11, "invalid association header" }, | |
387 | { 0x13, "association header required" }, | |
388 | { 0x15, "invalid originator S_ID" }, | |
389 | { 0x17, "invalid OX_ID-RX-ID combination" }, | |
390 | { 0x19, "command (request) already in progress" }, | |
391 | { 0x1E, "N_Port Login requested" }, | |
392 | { 0x1F, "Invalid N_Port_ID" }, | |
393 | }; | |
394 | ||
395 | static const struct { | |
396 | u16 fc_explain; | |
397 | char *name; | |
398 | } gs_explain [] = { | |
399 | { 0x00, "no additional explanation" }, | |
400 | { 0x01, "port identifier not registered" }, | |
401 | { 0x02, "port name not registered" }, | |
402 | { 0x03, "node name not registered" }, | |
403 | { 0x04, "class of service not registered" }, | |
404 | { 0x06, "initial process associator not registered" }, | |
405 | { 0x07, "FC-4 TYPEs not registered" }, | |
406 | { 0x08, "symbolic port name not registered" }, | |
407 | { 0x09, "symbolic node name not registered" }, | |
408 | { 0x0A, "port type not registered" }, | |
409 | { 0xF0, "authorization exception" }, | |
410 | { 0xF1, "authentication exception" }, | |
411 | { 0xF2, "data base full" }, | |
412 | { 0xF3, "data base empty" }, | |
413 | { 0xF4, "processing request" }, | |
414 | { 0xF5, "unable to verify connection" }, | |
415 | { 0xF6, "devices not in a common zone" }, | |
416 | }; | |
417 | ||
418 | /** | |
419 | * ibmvfc_get_ls_explain - Return the FC Explain description text | |
420 | * @status: FC Explain status | |
421 | * | |
422 | * Returns: | |
423 | * error string | |
424 | **/ | |
425 | static const char *ibmvfc_get_ls_explain(u16 status) | |
426 | { | |
427 | int i; | |
428 | ||
429 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) | |
430 | if (ls_explain[i].fc_explain == status) | |
431 | return ls_explain[i].name; | |
432 | ||
433 | return unknown_fc_explain; | |
434 | } | |
435 | ||
436 | /** | |
437 | * ibmvfc_get_gs_explain - Return the FC Explain description text | |
438 | * @status: FC Explain status | |
439 | * | |
440 | * Returns: | |
441 | * error string | |
442 | **/ | |
443 | static const char *ibmvfc_get_gs_explain(u16 status) | |
444 | { | |
445 | int i; | |
446 | ||
447 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) | |
448 | if (gs_explain[i].fc_explain == status) | |
449 | return gs_explain[i].name; | |
450 | ||
451 | return unknown_fc_explain; | |
452 | } | |
453 | ||
454 | static const struct { | |
455 | enum ibmvfc_fc_type fc_type; | |
456 | char *name; | |
457 | } fc_type [] = { | |
458 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, | |
459 | { IBMVFC_PORT_REJECT, "port reject" }, | |
460 | { IBMVFC_LS_REJECT, "ELS reject" }, | |
461 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, | |
462 | { IBMVFC_PORT_BUSY, "port busy" }, | |
463 | { IBMVFC_BASIC_REJECT, "basic reject" }, | |
464 | }; | |
465 | ||
466 | static const char *unknown_fc_type = "unknown fc type"; | |
467 | ||
468 | /** | |
469 | * ibmvfc_get_fc_type - Return the FC Type description text | |
470 | * @status: FC Type error status | |
471 | * | |
472 | * Returns: | |
473 | * error string | |
474 | **/ | |
475 | static const char *ibmvfc_get_fc_type(u16 status) | |
476 | { | |
477 | int i; | |
478 | ||
479 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) | |
480 | if (fc_type[i].fc_type == status) | |
481 | return fc_type[i].name; | |
482 | ||
483 | return unknown_fc_type; | |
484 | } | |
485 | ||
486 | /** | |
487 | * ibmvfc_set_tgt_action - Set the next init action for the target | |
488 | * @tgt: ibmvfc target struct | |
489 | * @action: action to perform | |
490 | * | |
ed830385 BK |
491 | * Returns: |
492 | * 0 if action changed / non-zero if not changed | |
072b91f9 | 493 | **/ |
ed830385 | 494 | static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, |
072b91f9 BK |
495 | enum ibmvfc_target_action action) |
496 | { | |
ed830385 BK |
497 | int rc = -EINVAL; |
498 | ||
072b91f9 | 499 | switch (tgt->action) { |
ed830385 BK |
500 | case IBMVFC_TGT_ACTION_LOGOUT_RPORT: |
501 | if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || | |
502 | action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
503 | tgt->action = action; | |
504 | rc = 0; | |
505 | } | |
506 | break; | |
507 | case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: | |
4b29cb61 BK |
508 | if (action == IBMVFC_TGT_ACTION_DEL_RPORT || |
509 | action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { | |
510 | tgt->action = action; | |
511 | rc = 0; | |
512 | } | |
513 | break; | |
514 | case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: | |
515 | if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { | |
516 | tgt->action = action; | |
517 | rc = 0; | |
518 | } | |
519 | break; | |
520 | case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: | |
521 | if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { | |
ed830385 BK |
522 | tgt->action = action; |
523 | rc = 0; | |
524 | } | |
525 | break; | |
072b91f9 | 526 | case IBMVFC_TGT_ACTION_DEL_RPORT: |
ed830385 | 527 | if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { |
d5da3040 | 528 | tgt->action = action; |
ed830385 BK |
529 | rc = 0; |
530 | } | |
4b29cb61 | 531 | break; |
d5da3040 | 532 | case IBMVFC_TGT_ACTION_DELETED_RPORT: |
072b91f9 BK |
533 | break; |
534 | default: | |
535 | tgt->action = action; | |
ed830385 | 536 | rc = 0; |
072b91f9 BK |
537 | break; |
538 | } | |
ed830385 | 539 | |
4b29cb61 BK |
540 | if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) |
541 | tgt->add_rport = 0; | |
542 | ||
ed830385 | 543 | return rc; |
072b91f9 BK |
544 | } |
545 | ||
546 | /** | |
547 | * ibmvfc_set_host_state - Set the state for the host | |
548 | * @vhost: ibmvfc host struct | |
549 | * @state: state to set host to | |
550 | * | |
551 | * Returns: | |
552 | * 0 if state changed / non-zero if not changed | |
553 | **/ | |
554 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, | |
555 | enum ibmvfc_host_state state) | |
556 | { | |
557 | int rc = 0; | |
558 | ||
559 | switch (vhost->state) { | |
560 | case IBMVFC_HOST_OFFLINE: | |
561 | rc = -EINVAL; | |
562 | break; | |
563 | default: | |
564 | vhost->state = state; | |
565 | break; | |
f36cfe6a | 566 | } |
072b91f9 BK |
567 | |
568 | return rc; | |
569 | } | |
570 | ||
571 | /** | |
572 | * ibmvfc_set_host_action - Set the next init action for the host | |
573 | * @vhost: ibmvfc host struct | |
574 | * @action: action to perform | |
575 | * | |
576 | **/ | |
577 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, | |
578 | enum ibmvfc_host_action action) | |
579 | { | |
580 | switch (action) { | |
581 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
582 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) | |
583 | vhost->action = action; | |
584 | break; | |
79111d08 BK |
585 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
586 | if (vhost->action == IBMVFC_HOST_ACTION_LOGO) | |
587 | vhost->action = action; | |
588 | break; | |
072b91f9 BK |
589 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
590 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) | |
591 | vhost->action = action; | |
592 | break; | |
593 | case IBMVFC_HOST_ACTION_QUERY: | |
594 | switch (vhost->action) { | |
595 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
596 | case IBMVFC_HOST_ACTION_NONE: | |
43c8da90 | 597 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
598 | vhost->action = action; |
599 | break; | |
600 | default: | |
601 | break; | |
f36cfe6a | 602 | } |
072b91f9 BK |
603 | break; |
604 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
605 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) | |
606 | vhost->action = action; | |
607 | break; | |
15cfef86 BK |
608 | case IBMVFC_HOST_ACTION_REENABLE: |
609 | case IBMVFC_HOST_ACTION_RESET: | |
610 | vhost->action = action; | |
611 | break; | |
072b91f9 BK |
612 | case IBMVFC_HOST_ACTION_INIT: |
613 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
15cfef86 BK |
614 | case IBMVFC_HOST_ACTION_LOGO: |
615 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
616 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: | |
617 | case IBMVFC_HOST_ACTION_NONE: | |
618 | default: | |
73ee5d86 BK |
619 | switch (vhost->action) { |
620 | case IBMVFC_HOST_ACTION_RESET: | |
621 | case IBMVFC_HOST_ACTION_REENABLE: | |
622 | break; | |
623 | default: | |
624 | vhost->action = action; | |
625 | break; | |
f36cfe6a | 626 | } |
73ee5d86 | 627 | break; |
f36cfe6a | 628 | } |
072b91f9 BK |
629 | } |
630 | ||
631 | /** | |
632 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) | |
633 | * @vhost: ibmvfc host struct | |
634 | * | |
635 | * Return value: | |
636 | * nothing | |
637 | **/ | |
638 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) | |
639 | { | |
4b29cb61 BK |
640 | if (vhost->action == IBMVFC_HOST_ACTION_NONE && |
641 | vhost->state == IBMVFC_ACTIVE) { | |
2d0da2a4 BK |
642 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
643 | scsi_block_requests(vhost->host); | |
644 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
645 | } | |
072b91f9 BK |
646 | } else |
647 | vhost->reinit = 1; | |
648 | ||
649 | wake_up(&vhost->work_wait_q); | |
650 | } | |
651 | ||
ed830385 BK |
652 | /** |
653 | * ibmvfc_del_tgt - Schedule cleanup and removal of the target | |
654 | * @tgt: ibmvfc target struct | |
ed830385 BK |
655 | **/ |
656 | static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) | |
657 | { | |
2e51f78b | 658 | if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { |
ed830385 | 659 | tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; |
2e51f78b BK |
660 | tgt->init_retries = 0; |
661 | } | |
ed830385 BK |
662 | wake_up(&tgt->vhost->work_wait_q); |
663 | } | |
664 | ||
072b91f9 BK |
665 | /** |
666 | * ibmvfc_link_down - Handle a link down event from the adapter | |
667 | * @vhost: ibmvfc host struct | |
668 | * @state: ibmvfc host state to enter | |
669 | * | |
670 | **/ | |
671 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, | |
672 | enum ibmvfc_host_state state) | |
673 | { | |
674 | struct ibmvfc_target *tgt; | |
675 | ||
676 | ENTER; | |
677 | scsi_block_requests(vhost->host); | |
678 | list_for_each_entry(tgt, &vhost->targets, queue) | |
ed830385 | 679 | ibmvfc_del_tgt(tgt); |
072b91f9 BK |
680 | ibmvfc_set_host_state(vhost, state); |
681 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
682 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; | |
683 | wake_up(&vhost->work_wait_q); | |
684 | LEAVE; | |
685 | } | |
686 | ||
687 | /** | |
688 | * ibmvfc_init_host - Start host initialization | |
689 | * @vhost: ibmvfc host struct | |
690 | * | |
691 | * Return value: | |
692 | * nothing | |
693 | **/ | |
861890c6 | 694 | static void ibmvfc_init_host(struct ibmvfc_host *vhost) |
072b91f9 BK |
695 | { |
696 | struct ibmvfc_target *tgt; | |
697 | ||
698 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
1c41fa82 | 699 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
072b91f9 BK |
700 | dev_err(vhost->dev, |
701 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
702 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
703 | return; | |
704 | } | |
705 | } | |
706 | ||
707 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
f8968665 | 708 | memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); |
861890c6 | 709 | vhost->async_crq.cur = 0; |
cf6f10d7 | 710 | |
072b91f9 | 711 | list_for_each_entry(tgt, &vhost->targets, queue) |
ed830385 | 712 | ibmvfc_del_tgt(tgt); |
072b91f9 BK |
713 | scsi_block_requests(vhost->host); |
714 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
715 | vhost->job_step = ibmvfc_npiv_login; | |
716 | wake_up(&vhost->work_wait_q); | |
717 | } | |
718 | } | |
719 | ||
720 | /** | |
721 | * ibmvfc_send_crq - Send a CRQ | |
722 | * @vhost: ibmvfc host struct | |
723 | * @word1: the first 64 bits of the data | |
724 | * @word2: the second 64 bits of the data | |
725 | * | |
726 | * Return value: | |
727 | * 0 on success / other on failure | |
728 | **/ | |
729 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) | |
730 | { | |
731 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
732 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); | |
733 | } | |
734 | ||
31750fbd TD |
735 | static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, |
736 | u64 word2, u64 word3, u64 word4) | |
737 | { | |
738 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
739 | ||
740 | return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, | |
741 | word1, word2, word3, word4); | |
742 | } | |
743 | ||
072b91f9 BK |
744 | /** |
745 | * ibmvfc_send_crq_init - Send a CRQ init message | |
746 | * @vhost: ibmvfc host struct | |
747 | * | |
748 | * Return value: | |
749 | * 0 on success / other on failure | |
750 | **/ | |
751 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) | |
752 | { | |
753 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); | |
754 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); | |
755 | } | |
756 | ||
757 | /** | |
758 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message | |
759 | * @vhost: ibmvfc host struct | |
760 | * | |
761 | * Return value: | |
762 | * 0 on success / other on failure | |
763 | **/ | |
764 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) | |
765 | { | |
766 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); | |
767 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); | |
768 | } | |
769 | ||
225acf5f TD |
770 | /** |
771 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host | |
772 | * @vhost: ibmvfc host who owns the event pool | |
dd9c7729 LJ |
773 | * @queue: ibmvfc queue struct |
774 | * @size: pool size | |
225acf5f TD |
775 | * |
776 | * Returns zero on success. | |
777 | **/ | |
778 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, | |
bb35ecb2 TD |
779 | struct ibmvfc_queue *queue, |
780 | unsigned int size) | |
225acf5f TD |
781 | { |
782 | int i; | |
783 | struct ibmvfc_event_pool *pool = &queue->evt_pool; | |
784 | ||
785 | ENTER; | |
bb35ecb2 TD |
786 | if (!size) |
787 | return 0; | |
788 | ||
789 | pool->size = size; | |
790 | pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL); | |
225acf5f TD |
791 | if (!pool->events) |
792 | return -ENOMEM; | |
793 | ||
794 | pool->iu_storage = dma_alloc_coherent(vhost->dev, | |
bb35ecb2 | 795 | size * sizeof(*pool->iu_storage), |
225acf5f TD |
796 | &pool->iu_token, 0); |
797 | ||
798 | if (!pool->iu_storage) { | |
799 | kfree(pool->events); | |
800 | return -ENOMEM; | |
801 | } | |
802 | ||
803 | INIT_LIST_HEAD(&queue->sent); | |
804 | INIT_LIST_HEAD(&queue->free); | |
805 | spin_lock_init(&queue->l_lock); | |
806 | ||
bb35ecb2 | 807 | for (i = 0; i < size; ++i) { |
225acf5f TD |
808 | struct ibmvfc_event *evt = &pool->events[i]; |
809 | ||
a264cf5e TD |
810 | /* |
811 | * evt->active states | |
812 | * 1 = in flight | |
813 | * 0 = being completed | |
814 | * -1 = free/freed | |
815 | */ | |
816 | atomic_set(&evt->active, -1); | |
225acf5f TD |
817 | atomic_set(&evt->free, 1); |
818 | evt->crq.valid = 0x80; | |
819 | evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); | |
820 | evt->xfer_iu = pool->iu_storage + i; | |
821 | evt->vhost = vhost; | |
822 | evt->queue = queue; | |
823 | evt->ext_list = NULL; | |
824 | list_add_tail(&evt->queue_list, &queue->free); | |
825 | } | |
826 | ||
827 | LEAVE; | |
828 | return 0; | |
829 | } | |
830 | ||
831 | /** | |
832 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host | |
833 | * @vhost: ibmvfc host who owns the event pool | |
dd9c7729 | 834 | * @queue: ibmvfc queue struct |
225acf5f TD |
835 | * |
836 | **/ | |
837 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, | |
838 | struct ibmvfc_queue *queue) | |
839 | { | |
840 | int i; | |
841 | struct ibmvfc_event_pool *pool = &queue->evt_pool; | |
842 | ||
843 | ENTER; | |
844 | for (i = 0; i < pool->size; ++i) { | |
845 | list_del(&pool->events[i].queue_list); | |
846 | BUG_ON(atomic_read(&pool->events[i].free) != 1); | |
847 | if (pool->events[i].ext_list) | |
848 | dma_pool_free(vhost->sg_pool, | |
849 | pool->events[i].ext_list, | |
850 | pool->events[i].ext_list_token); | |
851 | } | |
852 | ||
853 | kfree(pool->events); | |
854 | dma_free_coherent(vhost->dev, | |
855 | pool->size * sizeof(*pool->iu_storage), | |
856 | pool->iu_storage, pool->iu_token); | |
857 | LEAVE; | |
858 | } | |
859 | ||
f8968665 TD |
860 | /** |
861 | * ibmvfc_free_queue - Deallocate queue | |
862 | * @vhost: ibmvfc host struct | |
863 | * @queue: ibmvfc queue struct | |
864 | * | |
865 | * Unmaps dma and deallocates page for messages | |
866 | **/ | |
867 | static void ibmvfc_free_queue(struct ibmvfc_host *vhost, | |
868 | struct ibmvfc_queue *queue) | |
869 | { | |
870 | struct device *dev = vhost->dev; | |
871 | ||
872 | dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
873 | free_page((unsigned long)queue->msgs.handle); | |
874 | queue->msgs.handle = NULL; | |
003d91a1 TD |
875 | |
876 | ibmvfc_free_event_pool(vhost, queue); | |
f8968665 TD |
877 | } |
878 | ||
072b91f9 BK |
879 | /** |
880 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ | |
881 | * @vhost: ibmvfc host struct | |
882 | * | |
883 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters | |
884 | * the crq with the hypervisor. | |
885 | **/ | |
886 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) | |
887 | { | |
73ee5d86 | 888 | long rc = 0; |
072b91f9 | 889 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
f8968665 | 890 | struct ibmvfc_queue *crq = &vhost->crq; |
072b91f9 BK |
891 | |
892 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); | |
893 | free_irq(vdev->irq, vhost); | |
039a0898 | 894 | tasklet_kill(&vhost->tasklet); |
072b91f9 | 895 | do { |
73ee5d86 BK |
896 | if (rc) |
897 | msleep(100); | |
072b91f9 BK |
898 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
899 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
900 | ||
901 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 902 | vhost->logged_in = 0; |
f8968665 TD |
903 | |
904 | ibmvfc_free_queue(vhost, crq); | |
072b91f9 BK |
905 | } |
906 | ||
907 | /** | |
908 | * ibmvfc_reenable_crq_queue - reenables the CRQ | |
909 | * @vhost: ibmvfc host struct | |
910 | * | |
911 | * Return value: | |
912 | * 0 on success / other on failure | |
913 | **/ | |
914 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) | |
915 | { | |
73ee5d86 | 916 | int rc = 0; |
072b91f9 | 917 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
dbdbb81b TD |
918 | unsigned long flags; |
919 | ||
920 | ibmvfc_release_sub_crqs(vhost); | |
072b91f9 BK |
921 | |
922 | /* Re-enable the CRQ */ | |
923 | do { | |
73ee5d86 BK |
924 | if (rc) |
925 | msleep(100); | |
072b91f9 BK |
926 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
927 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
928 | ||
929 | if (rc) | |
930 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); | |
931 | ||
dbdbb81b TD |
932 | spin_lock_irqsave(vhost->host->host_lock, flags); |
933 | spin_lock(vhost->crq.q_lock); | |
934 | vhost->do_enquiry = 1; | |
935 | vhost->using_channels = 0; | |
936 | spin_unlock(vhost->crq.q_lock); | |
937 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
938 | ||
939 | ibmvfc_init_sub_crqs(vhost); | |
940 | ||
072b91f9 BK |
941 | return rc; |
942 | } | |
943 | ||
944 | /** | |
945 | * ibmvfc_reset_crq - resets a crq after a failure | |
946 | * @vhost: ibmvfc host struct | |
947 | * | |
948 | * Return value: | |
949 | * 0 on success / other on failure | |
950 | **/ | |
951 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) | |
952 | { | |
73ee5d86 BK |
953 | int rc = 0; |
954 | unsigned long flags; | |
072b91f9 | 955 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
f8968665 | 956 | struct ibmvfc_queue *crq = &vhost->crq; |
5cf52964 TD |
957 | |
958 | ibmvfc_release_sub_crqs(vhost); | |
072b91f9 BK |
959 | |
960 | /* Close the CRQ */ | |
961 | do { | |
73ee5d86 BK |
962 | if (rc) |
963 | msleep(100); | |
072b91f9 BK |
964 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
965 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
966 | ||
73ee5d86 | 967 | spin_lock_irqsave(vhost->host->host_lock, flags); |
57e80e0b | 968 | spin_lock(vhost->crq.q_lock); |
072b91f9 | 969 | vhost->state = IBMVFC_NO_CRQ; |
79111d08 | 970 | vhost->logged_in = 0; |
e95eef3f TD |
971 | vhost->do_enquiry = 1; |
972 | vhost->using_channels = 0; | |
072b91f9 BK |
973 | |
974 | /* Clean out the queue */ | |
f8968665 | 975 | memset(crq->msgs.crq, 0, PAGE_SIZE); |
072b91f9 BK |
976 | crq->cur = 0; |
977 | ||
978 | /* And re-open it again */ | |
979 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
980 | crq->msg_token, PAGE_SIZE); | |
981 | ||
982 | if (rc == H_CLOSED) | |
983 | /* Adapter is good, but other end is not ready */ | |
984 | dev_warn(vhost->dev, "Partner adapter not ready\n"); | |
985 | else if (rc != 0) | |
986 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); | |
5cf52964 | 987 | |
57e80e0b | 988 | spin_unlock(vhost->crq.q_lock); |
73ee5d86 | 989 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
072b91f9 | 990 | |
5cf52964 TD |
991 | ibmvfc_init_sub_crqs(vhost); |
992 | ||
072b91f9 BK |
993 | return rc; |
994 | } | |
995 | ||
996 | /** | |
997 | * ibmvfc_valid_event - Determines if event is valid. | |
998 | * @pool: event_pool that contains the event | |
999 | * @evt: ibmvfc event to be checked for validity | |
1000 | * | |
1001 | * Return value: | |
1002 | * 1 if event is valid / 0 if event is not valid | |
1003 | **/ | |
1004 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, | |
1005 | struct ibmvfc_event *evt) | |
1006 | { | |
1007 | int index = evt - pool->events; | |
1008 | if (index < 0 || index >= pool->size) /* outside of bounds */ | |
1009 | return 0; | |
1010 | if (evt != pool->events + index) /* unaligned */ | |
1011 | return 0; | |
1012 | return 1; | |
1013 | } | |
1014 | ||
1015 | /** | |
1016 | * ibmvfc_free_event - Free the specified event | |
1017 | * @evt: ibmvfc_event to be freed | |
1018 | * | |
1019 | **/ | |
1020 | static void ibmvfc_free_event(struct ibmvfc_event *evt) | |
1021 | { | |
e4b26f3d | 1022 | struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; |
57e80e0b | 1023 | unsigned long flags; |
072b91f9 BK |
1024 | |
1025 | BUG_ON(!ibmvfc_valid_event(pool, evt)); | |
1026 | BUG_ON(atomic_inc_return(&evt->free) != 1); | |
a264cf5e | 1027 | BUG_ON(atomic_dec_and_test(&evt->active)); |
57e80e0b TD |
1028 | |
1029 | spin_lock_irqsave(&evt->queue->l_lock, flags); | |
e4b26f3d | 1030 | list_add_tail(&evt->queue_list, &evt->queue->free); |
57e80e0b TD |
1031 | if (evt->eh_comp) |
1032 | complete(evt->eh_comp); | |
1033 | spin_unlock_irqrestore(&evt->queue->l_lock, flags); | |
072b91f9 BK |
1034 | } |
1035 | ||
1036 | /** | |
1037 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands | |
1038 | * @evt: ibmvfc event struct | |
1039 | * | |
1040 | * This function does not setup any error status, that must be done | |
1041 | * before this function gets called. | |
1042 | **/ | |
1043 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) | |
1044 | { | |
1045 | struct scsi_cmnd *cmnd = evt->cmnd; | |
1046 | ||
1047 | if (cmnd) { | |
1048 | scsi_dma_unmap(cmnd); | |
1049 | cmnd->scsi_done(cmnd); | |
1050 | } | |
1051 | ||
1052 | ibmvfc_free_event(evt); | |
1053 | } | |
1054 | ||
57e80e0b TD |
1055 | /** |
1056 | * ibmvfc_complete_purge - Complete failed command list | |
1057 | * @purge_list: list head of failed commands | |
1058 | * | |
1059 | * This function runs completions on commands to fail as a result of a | |
1f4a4a19 | 1060 | * host reset or platform migration. |
57e80e0b TD |
1061 | **/ |
1062 | static void ibmvfc_complete_purge(struct list_head *purge_list) | |
1063 | { | |
1064 | struct ibmvfc_event *evt, *pos; | |
1065 | ||
1066 | list_for_each_entry_safe(evt, pos, purge_list, queue_list) { | |
1067 | list_del(&evt->queue_list); | |
1068 | ibmvfc_trc_end(evt); | |
1069 | evt->done(evt); | |
1070 | } | |
1071 | } | |
1072 | ||
072b91f9 BK |
1073 | /** |
1074 | * ibmvfc_fail_request - Fail request with specified error code | |
1075 | * @evt: ibmvfc event struct | |
1076 | * @error_code: error code to fail request with | |
1077 | * | |
1078 | * Return value: | |
1079 | * none | |
1080 | **/ | |
1081 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) | |
1082 | { | |
a264cf5e TD |
1083 | /* |
1084 | * Anything we are failing should still be active. Otherwise, it | |
1085 | * implies we already got a response for the command and are doing | |
1086 | * something bad like double completing it. | |
1087 | */ | |
1088 | BUG_ON(!atomic_dec_and_test(&evt->active)); | |
072b91f9 BK |
1089 | if (evt->cmnd) { |
1090 | evt->cmnd->result = (error_code << 16); | |
1091 | evt->done = ibmvfc_scsi_eh_done; | |
1092 | } else | |
0aab6c3f | 1093 | evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); |
072b91f9 | 1094 | |
072b91f9 | 1095 | del_timer(&evt->timer); |
072b91f9 BK |
1096 | } |
1097 | ||
1098 | /** | |
1099 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests | |
1100 | * @vhost: ibmvfc host struct | |
1101 | * @error_code: error code to fail requests with | |
1102 | * | |
1103 | * Return value: | |
1104 | * none | |
1105 | **/ | |
1106 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) | |
1107 | { | |
1108 | struct ibmvfc_event *evt, *pos; | |
7eb3ccd8 | 1109 | struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; |
57e80e0b | 1110 | unsigned long flags; |
7eb3ccd8 TD |
1111 | int hwqs = 0; |
1112 | int i; | |
1113 | ||
1114 | if (vhost->using_channels) | |
1115 | hwqs = vhost->scsi_scrqs.active_queues; | |
072b91f9 BK |
1116 | |
1117 | ibmvfc_dbg(vhost, "Purging all requests\n"); | |
57e80e0b | 1118 | spin_lock_irqsave(&vhost->crq.l_lock, flags); |
e4b26f3d | 1119 | list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) |
072b91f9 | 1120 | ibmvfc_fail_request(evt, error_code); |
57e80e0b TD |
1121 | list_splice_init(&vhost->crq.sent, &vhost->purge); |
1122 | spin_unlock_irqrestore(&vhost->crq.l_lock, flags); | |
7eb3ccd8 TD |
1123 | |
1124 | for (i = 0; i < hwqs; i++) { | |
1125 | spin_lock_irqsave(queues[i].q_lock, flags); | |
1126 | spin_lock(&queues[i].l_lock); | |
1127 | list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) | |
1128 | ibmvfc_fail_request(evt, error_code); | |
1129 | list_splice_init(&queues[i].sent, &vhost->purge); | |
1130 | spin_unlock(&queues[i].l_lock); | |
1131 | spin_unlock_irqrestore(queues[i].q_lock, flags); | |
1132 | } | |
072b91f9 BK |
1133 | } |
1134 | ||
1135 | /** | |
79111d08 | 1136 | * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ |
072b91f9 BK |
1137 | * @vhost: struct ibmvfc host to reset |
1138 | **/ | |
79111d08 | 1139 | static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) |
072b91f9 | 1140 | { |
072b91f9 | 1141 | ibmvfc_purge_requests(vhost, DID_ERROR); |
73ee5d86 BK |
1142 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
1143 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); | |
072b91f9 BK |
1144 | } |
1145 | ||
1146 | /** | |
79111d08 | 1147 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
072b91f9 BK |
1148 | * @vhost: struct ibmvfc host to reset |
1149 | **/ | |
79111d08 BK |
1150 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
1151 | { | |
1152 | if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && | |
1153 | !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
1154 | scsi_block_requests(vhost->host); | |
1155 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); | |
1156 | vhost->job_step = ibmvfc_npiv_logout; | |
1157 | wake_up(&vhost->work_wait_q); | |
1158 | } else | |
1159 | ibmvfc_hard_reset_host(vhost); | |
1160 | } | |
1161 | ||
1162 | /** | |
1163 | * ibmvfc_reset_host - Reset the connection to the server | |
1164 | * @vhost: ibmvfc host struct | |
1165 | **/ | |
072b91f9 BK |
1166 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
1167 | { | |
1168 | unsigned long flags; | |
1169 | ||
1170 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1171 | __ibmvfc_reset_host(vhost); | |
1172 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1173 | } | |
1174 | ||
1175 | /** | |
1176 | * ibmvfc_retry_host_init - Retry host initialization if allowed | |
1177 | * @vhost: ibmvfc host struct | |
1178 | * | |
7d0e4622 BK |
1179 | * Returns: 1 if init will be retried / 0 if not |
1180 | * | |
072b91f9 | 1181 | **/ |
7d0e4622 | 1182 | static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
072b91f9 | 1183 | { |
7d0e4622 BK |
1184 | int retry = 0; |
1185 | ||
072b91f9 | 1186 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
1c41fa82 BK |
1187 | vhost->delay_init = 1; |
1188 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { | |
072b91f9 BK |
1189 | dev_err(vhost->dev, |
1190 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
1191 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
1c41fa82 | 1192 | } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
072b91f9 | 1193 | __ibmvfc_reset_host(vhost); |
7d0e4622 | 1194 | else { |
072b91f9 | 1195 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
7d0e4622 BK |
1196 | retry = 1; |
1197 | } | |
072b91f9 BK |
1198 | } |
1199 | ||
1200 | wake_up(&vhost->work_wait_q); | |
7d0e4622 | 1201 | return retry; |
072b91f9 BK |
1202 | } |
1203 | ||
1204 | /** | |
b3c10489 | 1205 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
072b91f9 BK |
1206 | * @starget: scsi target struct |
1207 | * | |
1208 | * Return value: | |
1209 | * ibmvfc_target struct / NULL if not found | |
1210 | **/ | |
b3c10489 | 1211 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
1212 | { |
1213 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1214 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1215 | struct ibmvfc_target *tgt; | |
1216 | ||
1217 | list_for_each_entry(tgt, &vhost->targets, queue) | |
b3c10489 BK |
1218 | if (tgt->target_id == starget->id) { |
1219 | kref_get(&tgt->kref); | |
072b91f9 | 1220 | return tgt; |
b3c10489 | 1221 | } |
072b91f9 BK |
1222 | return NULL; |
1223 | } | |
1224 | ||
1225 | /** | |
b3c10489 | 1226 | * ibmvfc_get_target - Find the specified scsi_target |
072b91f9 BK |
1227 | * @starget: scsi target struct |
1228 | * | |
1229 | * Return value: | |
1230 | * ibmvfc_target struct / NULL if not found | |
1231 | **/ | |
b3c10489 | 1232 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
1233 | { |
1234 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1235 | struct ibmvfc_target *tgt; | |
1236 | unsigned long flags; | |
1237 | ||
1238 | spin_lock_irqsave(shost->host_lock, flags); | |
b3c10489 | 1239 | tgt = __ibmvfc_get_target(starget); |
072b91f9 BK |
1240 | spin_unlock_irqrestore(shost->host_lock, flags); |
1241 | return tgt; | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * ibmvfc_get_host_speed - Get host port speed | |
1246 | * @shost: scsi host struct | |
1247 | * | |
1248 | * Return value: | |
1249 | * none | |
1250 | **/ | |
1251 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) | |
1252 | { | |
1253 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1254 | unsigned long flags; | |
1255 | ||
1256 | spin_lock_irqsave(shost->host_lock, flags); | |
1257 | if (vhost->state == IBMVFC_ACTIVE) { | |
0aab6c3f | 1258 | switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { |
072b91f9 BK |
1259 | case 1: |
1260 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; | |
1261 | break; | |
1262 | case 2: | |
1263 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; | |
1264 | break; | |
1265 | case 4: | |
1266 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; | |
1267 | break; | |
1268 | case 8: | |
1269 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; | |
1270 | break; | |
1271 | case 10: | |
1272 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; | |
1273 | break; | |
1274 | case 16: | |
1275 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; | |
1276 | break; | |
1277 | default: | |
775a42ec | 1278 | ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
0aab6c3f | 1279 | be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); |
072b91f9 BK |
1280 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
1281 | break; | |
1282 | } | |
1283 | } else | |
1284 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
1285 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1286 | } | |
1287 | ||
1288 | /** | |
1289 | * ibmvfc_get_host_port_state - Get host port state | |
1290 | * @shost: scsi host struct | |
1291 | * | |
1292 | * Return value: | |
1293 | * none | |
1294 | **/ | |
1295 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) | |
1296 | { | |
1297 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1298 | unsigned long flags; | |
1299 | ||
1300 | spin_lock_irqsave(shost->host_lock, flags); | |
1301 | switch (vhost->state) { | |
1302 | case IBMVFC_INITIALIZING: | |
1303 | case IBMVFC_ACTIVE: | |
1304 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
1305 | break; | |
1306 | case IBMVFC_LINK_DOWN: | |
1307 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
1308 | break; | |
1309 | case IBMVFC_LINK_DEAD: | |
1310 | case IBMVFC_HOST_OFFLINE: | |
1311 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
1312 | break; | |
1313 | case IBMVFC_HALTED: | |
1314 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; | |
1315 | break; | |
0ae808e0 BK |
1316 | case IBMVFC_NO_CRQ: |
1317 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1318 | break; | |
072b91f9 BK |
1319 | default: |
1320 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); | |
1321 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1322 | break; | |
1323 | } | |
1324 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1325 | } | |
1326 | ||
1327 | /** | |
1328 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout | |
1329 | * @rport: rport struct | |
1330 | * @timeout: timeout value | |
1331 | * | |
1332 | * Return value: | |
1333 | * none | |
1334 | **/ | |
1335 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) | |
1336 | { | |
1337 | if (timeout) | |
1338 | rport->dev_loss_tmo = timeout; | |
1339 | else | |
1340 | rport->dev_loss_tmo = 1; | |
1341 | } | |
1342 | ||
b3c10489 BK |
1343 | /** |
1344 | * ibmvfc_release_tgt - Free memory allocated for a target | |
1345 | * @kref: kref struct | |
1346 | * | |
1347 | **/ | |
1348 | static void ibmvfc_release_tgt(struct kref *kref) | |
1349 | { | |
1350 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); | |
1351 | kfree(tgt); | |
1352 | } | |
1353 | ||
072b91f9 BK |
1354 | /** |
1355 | * ibmvfc_get_starget_node_name - Get SCSI target's node name | |
1356 | * @starget: scsi target struct | |
1357 | * | |
1358 | * Return value: | |
1359 | * none | |
1360 | **/ | |
1361 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) | |
1362 | { | |
b3c10489 | 1363 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1364 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
b3c10489 BK |
1365 | if (tgt) |
1366 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1367 | } |
1368 | ||
1369 | /** | |
1370 | * ibmvfc_get_starget_port_name - Get SCSI target's port name | |
1371 | * @starget: scsi target struct | |
1372 | * | |
1373 | * Return value: | |
1374 | * none | |
1375 | **/ | |
1376 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) | |
1377 | { | |
b3c10489 | 1378 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1379 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
b3c10489 BK |
1380 | if (tgt) |
1381 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1382 | } |
1383 | ||
1384 | /** | |
1385 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID | |
1386 | * @starget: scsi target struct | |
1387 | * | |
1388 | * Return value: | |
1389 | * none | |
1390 | **/ | |
1391 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) | |
1392 | { | |
b3c10489 | 1393 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1394 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
b3c10489 BK |
1395 | if (tgt) |
1396 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1397 | } |
1398 | ||
1399 | /** | |
1400 | * ibmvfc_wait_while_resetting - Wait while the host resets | |
1401 | * @vhost: ibmvfc host struct | |
1402 | * | |
1403 | * Return value: | |
1404 | * 0 on success / other on failure | |
1405 | **/ | |
1406 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) | |
1407 | { | |
1408 | long timeout = wait_event_timeout(vhost->init_wait_q, | |
3eddc569 BK |
1409 | ((vhost->state == IBMVFC_ACTIVE || |
1410 | vhost->state == IBMVFC_HOST_OFFLINE || | |
1411 | vhost->state == IBMVFC_LINK_DEAD) && | |
1412 | vhost->action == IBMVFC_HOST_ACTION_NONE), | |
072b91f9 BK |
1413 | (init_timeout * HZ)); |
1414 | ||
1415 | return timeout ? 0 : -EIO; | |
1416 | } | |
1417 | ||
1418 | /** | |
1419 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization | |
1420 | * @shost: scsi host struct | |
1421 | * | |
1422 | * Return value: | |
1423 | * 0 on success / other on failure | |
1424 | **/ | |
1425 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) | |
1426 | { | |
1427 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1428 | ||
1429 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); | |
1430 | ibmvfc_reset_host(vhost); | |
1431 | return ibmvfc_wait_while_resetting(vhost); | |
1432 | } | |
1433 | ||
1434 | /** | |
1435 | * ibmvfc_gather_partition_info - Gather info about the LPAR | |
dd9c7729 | 1436 | * @vhost: ibmvfc host struct |
072b91f9 BK |
1437 | * |
1438 | * Return value: | |
1439 | * none | |
1440 | **/ | |
1441 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) | |
1442 | { | |
1443 | struct device_node *rootdn; | |
1444 | const char *name; | |
1445 | const unsigned int *num; | |
1446 | ||
1447 | rootdn = of_find_node_by_path("/"); | |
1448 | if (!rootdn) | |
1449 | return; | |
1450 | ||
1451 | name = of_get_property(rootdn, "ibm,partition-name", NULL); | |
1452 | if (name) | |
1453 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); | |
1454 | num = of_get_property(rootdn, "ibm,partition-no", NULL); | |
1455 | if (num) | |
1456 | vhost->partition_number = *num; | |
1457 | of_node_put(rootdn); | |
1458 | } | |
1459 | ||
1460 | /** | |
1461 | * ibmvfc_set_login_info - Setup info for NPIV login | |
1462 | * @vhost: ibmvfc host struct | |
1463 | * | |
1464 | * Return value: | |
1465 | * none | |
1466 | **/ | |
1467 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) | |
1468 | { | |
1469 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; | |
f8968665 | 1470 | struct ibmvfc_queue *async_crq = &vhost->async_crq; |
61c7a080 | 1471 | struct device_node *of_node = vhost->dev->of_node; |
072b91f9 BK |
1472 | const char *location; |
1473 | ||
1474 | memset(login_info, 0, sizeof(*login_info)); | |
1475 | ||
0aab6c3f TD |
1476 | login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); |
1477 | login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); | |
1478 | login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); | |
1479 | login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); | |
1480 | login_info->partition_num = cpu_to_be32(vhost->partition_number); | |
1481 | login_info->vfc_frame_version = cpu_to_be32(1); | |
1482 | login_info->fcp_version = cpu_to_be16(3); | |
1483 | login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); | |
072b91f9 | 1484 | if (vhost->client_migrated) |
0aab6c3f | 1485 | login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); |
072b91f9 | 1486 | |
0aab6c3f | 1487 | login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); |
e4af87b7 | 1488 | login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); |
c53408ba TD |
1489 | |
1490 | if (vhost->mq_enabled || vhost->using_channels) | |
1491 | login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); | |
1492 | ||
0aab6c3f | 1493 | login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); |
f8968665 TD |
1494 | login_info->async.len = cpu_to_be32(async_crq->size * |
1495 | sizeof(*async_crq->msgs.async)); | |
072b91f9 BK |
1496 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
1497 | strncpy(login_info->device_name, | |
71610f55 | 1498 | dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
072b91f9 BK |
1499 | |
1500 | location = of_get_property(of_node, "ibm,loc-code", NULL); | |
71610f55 | 1501 | location = location ? location : dev_name(vhost->dev); |
072b91f9 BK |
1502 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
1503 | } | |
1504 | ||
072b91f9 BK |
1505 | /** |
1506 | * ibmvfc_get_event - Gets the next free event in pool | |
dd9c7729 | 1507 | * @queue: ibmvfc queue struct |
072b91f9 BK |
1508 | * |
1509 | * Returns a free event from the pool. | |
1510 | **/ | |
e4b26f3d | 1511 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue) |
072b91f9 BK |
1512 | { |
1513 | struct ibmvfc_event *evt; | |
57e80e0b | 1514 | unsigned long flags; |
072b91f9 | 1515 | |
57e80e0b | 1516 | spin_lock_irqsave(&queue->l_lock, flags); |
e4b26f3d TD |
1517 | BUG_ON(list_empty(&queue->free)); |
1518 | evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); | |
072b91f9 | 1519 | atomic_set(&evt->free, 0); |
e4b26f3d | 1520 | list_del(&evt->queue_list); |
57e80e0b | 1521 | spin_unlock_irqrestore(&queue->l_lock, flags); |
072b91f9 BK |
1522 | return evt; |
1523 | } | |
1524 | ||
1f4a4a19 TD |
1525 | /** |
1526 | * ibmvfc_locked_done - Calls evt completion with host_lock held | |
1527 | * @evt: ibmvfc evt to complete | |
1528 | * | |
1529 | * All non-scsi command completion callbacks have the expectation that the | |
1530 | * host_lock is held. This callback is used by ibmvfc_init_event to wrap a | |
1531 | * MAD evt with the host_lock. | |
1532 | **/ | |
1533 | static void ibmvfc_locked_done(struct ibmvfc_event *evt) | |
1534 | { | |
1535 | unsigned long flags; | |
1536 | ||
1537 | spin_lock_irqsave(evt->vhost->host->host_lock, flags); | |
1538 | evt->_done(evt); | |
1539 | spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); | |
1540 | } | |
1541 | ||
072b91f9 BK |
1542 | /** |
1543 | * ibmvfc_init_event - Initialize fields in an event struct that are always | |
1544 | * required. | |
1545 | * @evt: The event | |
1546 | * @done: Routine to call when the event is responded to | |
1547 | * @format: SRP or MAD format | |
1548 | **/ | |
1549 | static void ibmvfc_init_event(struct ibmvfc_event *evt, | |
1550 | void (*done) (struct ibmvfc_event *), u8 format) | |
1551 | { | |
1552 | evt->cmnd = NULL; | |
1553 | evt->sync_iu = NULL; | |
ad8dcffa | 1554 | evt->eh_comp = NULL; |
1f4a4a19 TD |
1555 | evt->crq.format = format; |
1556 | if (format == IBMVFC_CMD_FORMAT) | |
1557 | evt->done = done; | |
1558 | else { | |
1559 | evt->_done = done; | |
1560 | evt->done = ibmvfc_locked_done; | |
1561 | } | |
cb72477b | 1562 | evt->hwq = 0; |
072b91f9 BK |
1563 | } |
1564 | ||
1565 | /** | |
1566 | * ibmvfc_map_sg_list - Initialize scatterlist | |
1567 | * @scmd: scsi command struct | |
1568 | * @nseg: number of scatterlist segments | |
1569 | * @md: memory descriptor list to initialize | |
1570 | **/ | |
1571 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, | |
1572 | struct srp_direct_buf *md) | |
1573 | { | |
1574 | int i; | |
1575 | struct scatterlist *sg; | |
1576 | ||
1577 | scsi_for_each_sg(scmd, sg, nseg, i) { | |
0aab6c3f TD |
1578 | md[i].va = cpu_to_be64(sg_dma_address(sg)); |
1579 | md[i].len = cpu_to_be32(sg_dma_len(sg)); | |
072b91f9 BK |
1580 | md[i].key = 0; |
1581 | } | |
1582 | } | |
1583 | ||
1584 | /** | |
0a19a725 | 1585 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields |
91ebc1fa | 1586 | * @scmd: struct scsi_cmnd with the scatterlist |
072b91f9 BK |
1587 | * @evt: ibmvfc event struct |
1588 | * @vfc_cmd: vfc_cmd that contains the memory descriptor | |
1589 | * @dev: device for which to map dma memory | |
1590 | * | |
1591 | * Returns: | |
1592 | * 0 on success / non-zero on failure | |
1593 | **/ | |
1594 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, | |
1595 | struct ibmvfc_event *evt, | |
1596 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) | |
1597 | { | |
1598 | ||
1599 | int sg_mapped; | |
1600 | struct srp_direct_buf *data = &vfc_cmd->ioba; | |
1601 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
5a9d16f7 | 1602 | struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); |
072b91f9 | 1603 | |
a6104b1e TD |
1604 | if (cls3_error) |
1605 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); | |
1606 | ||
072b91f9 BK |
1607 | sg_mapped = scsi_dma_map(scmd); |
1608 | if (!sg_mapped) { | |
0aab6c3f | 1609 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); |
072b91f9 BK |
1610 | return 0; |
1611 | } else if (unlikely(sg_mapped < 0)) { | |
1612 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1613 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); | |
1614 | return sg_mapped; | |
1615 | } | |
1616 | ||
1617 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
0aab6c3f | 1618 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); |
c16b8a6d | 1619 | iu->add_cdb_len |= IBMVFC_WRDATA; |
072b91f9 | 1620 | } else { |
0aab6c3f | 1621 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); |
c16b8a6d | 1622 | iu->add_cdb_len |= IBMVFC_RDDATA; |
072b91f9 BK |
1623 | } |
1624 | ||
1625 | if (sg_mapped == 1) { | |
1626 | ibmvfc_map_sg_list(scmd, sg_mapped, data); | |
1627 | return 0; | |
1628 | } | |
1629 | ||
0aab6c3f | 1630 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); |
072b91f9 BK |
1631 | |
1632 | if (!evt->ext_list) { | |
1633 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, | |
1634 | &evt->ext_list_token); | |
1635 | ||
1636 | if (!evt->ext_list) { | |
64b840dd BK |
1637 | scsi_dma_unmap(scmd); |
1638 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1639 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); | |
072b91f9 BK |
1640 | return -ENOMEM; |
1641 | } | |
1642 | } | |
1643 | ||
1644 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); | |
1645 | ||
0aab6c3f TD |
1646 | data->va = cpu_to_be64(evt->ext_list_token); |
1647 | data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); | |
072b91f9 BK |
1648 | data->key = 0; |
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | /** | |
1653 | * ibmvfc_timeout - Internal command timeout handler | |
dd9c7729 | 1654 | * @t: struct ibmvfc_event that timed out |
072b91f9 BK |
1655 | * |
1656 | * Called when an internally generated command times out | |
1657 | **/ | |
9a5d04fc | 1658 | static void ibmvfc_timeout(struct timer_list *t) |
072b91f9 | 1659 | { |
9a5d04fc | 1660 | struct ibmvfc_event *evt = from_timer(evt, t, timer); |
072b91f9 BK |
1661 | struct ibmvfc_host *vhost = evt->vhost; |
1662 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); | |
1663 | ibmvfc_reset_host(vhost); | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() | |
1668 | * @evt: event to be sent | |
1669 | * @vhost: ibmvfc host struct | |
1670 | * @timeout: timeout in seconds - 0 means do not time command | |
1671 | * | |
1672 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) | |
1673 | **/ | |
1674 | static int ibmvfc_send_event(struct ibmvfc_event *evt, | |
1675 | struct ibmvfc_host *vhost, unsigned long timeout) | |
1676 | { | |
0aab6c3f | 1677 | __be64 *crq_as_u64 = (__be64 *) &evt->crq; |
57e80e0b | 1678 | unsigned long flags; |
072b91f9 BK |
1679 | int rc; |
1680 | ||
1681 | /* Copy the IU into the transfer area */ | |
1682 | *evt->xfer_iu = evt->iu; | |
1683 | if (evt->crq.format == IBMVFC_CMD_FORMAT) | |
0aab6c3f | 1684 | evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); |
072b91f9 | 1685 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
0aab6c3f | 1686 | evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); |
072b91f9 BK |
1687 | else |
1688 | BUG(); | |
1689 | ||
9a5d04fc | 1690 | timer_setup(&evt->timer, ibmvfc_timeout, 0); |
072b91f9 BK |
1691 | |
1692 | if (timeout) { | |
072b91f9 | 1693 | evt->timer.expires = jiffies + (timeout * HZ); |
072b91f9 BK |
1694 | add_timer(&evt->timer); |
1695 | } | |
1696 | ||
57e80e0b TD |
1697 | spin_lock_irqsave(&evt->queue->l_lock, flags); |
1698 | list_add_tail(&evt->queue_list, &evt->queue->sent); | |
e20f80b9 | 1699 | atomic_set(&evt->active, 1); |
57e80e0b | 1700 | |
a528ab7a BK |
1701 | mb(); |
1702 | ||
31750fbd TD |
1703 | if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) |
1704 | rc = ibmvfc_send_sub_crq(vhost, | |
1705 | evt->queue->vios_cookie, | |
1706 | be64_to_cpu(crq_as_u64[0]), | |
1707 | be64_to_cpu(crq_as_u64[1]), | |
1708 | 0, 0); | |
1709 | else | |
1710 | rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), | |
1711 | be64_to_cpu(crq_as_u64[1])); | |
1712 | ||
1713 | if (rc) { | |
e20f80b9 | 1714 | atomic_set(&evt->active, 0); |
e4b26f3d | 1715 | list_del(&evt->queue_list); |
57e80e0b | 1716 | spin_unlock_irqrestore(&evt->queue->l_lock, flags); |
072b91f9 BK |
1717 | del_timer(&evt->timer); |
1718 | ||
1719 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. | |
1720 | * Firmware will send a CRQ with a transport event (0xFF) to | |
1721 | * tell this client what has happened to the transport. This | |
1722 | * will be handled in ibmvfc_handle_crq() | |
1723 | */ | |
1724 | if (rc == H_CLOSED) { | |
1725 | if (printk_ratelimit()) | |
1726 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); | |
1727 | if (evt->cmnd) | |
1728 | scsi_dma_unmap(evt->cmnd); | |
1729 | ibmvfc_free_event(evt); | |
1730 | return SCSI_MLQUEUE_HOST_BUSY; | |
1731 | } | |
1732 | ||
1733 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); | |
1734 | if (evt->cmnd) { | |
1735 | evt->cmnd->result = DID_ERROR << 16; | |
1736 | evt->done = ibmvfc_scsi_eh_done; | |
1737 | } else | |
0aab6c3f | 1738 | evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); |
072b91f9 BK |
1739 | |
1740 | evt->done(evt); | |
57e80e0b TD |
1741 | } else { |
1742 | spin_unlock_irqrestore(&evt->queue->l_lock, flags); | |
072b91f9 | 1743 | ibmvfc_trc_start(evt); |
57e80e0b | 1744 | } |
072b91f9 BK |
1745 | |
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | /** | |
1750 | * ibmvfc_log_error - Log an error for the failed command if appropriate | |
1751 | * @evt: ibmvfc event to log | |
1752 | * | |
1753 | **/ | |
1754 | static void ibmvfc_log_error(struct ibmvfc_event *evt) | |
1755 | { | |
1756 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1757 | struct ibmvfc_host *vhost = evt->vhost; | |
5a9d16f7 | 1758 | struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); |
072b91f9 BK |
1759 | struct scsi_cmnd *cmnd = evt->cmnd; |
1760 | const char *err = unknown_error; | |
0aab6c3f | 1761 | int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
072b91f9 BK |
1762 | int logerr = 0; |
1763 | int rsp_code = 0; | |
1764 | ||
1765 | if (index >= 0) { | |
1766 | logerr = cmd_status[index].log; | |
1767 | err = cmd_status[index].name; | |
1768 | } | |
1769 | ||
0ae808e0 | 1770 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
072b91f9 BK |
1771 | return; |
1772 | ||
1773 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1774 | rsp_code = rsp->data.info.rsp_code; | |
1775 | ||
6dc6a944 | 1776 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " |
072b91f9 | 1777 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", |
3e6f7de4 | 1778 | cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), |
072b91f9 BK |
1779 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); |
1780 | } | |
1781 | ||
6d29cc56 BK |
1782 | /** |
1783 | * ibmvfc_relogin - Log back into the specified device | |
1784 | * @sdev: scsi device struct | |
1785 | * | |
1786 | **/ | |
1787 | static void ibmvfc_relogin(struct scsi_device *sdev) | |
1788 | { | |
1789 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1790 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1791 | struct ibmvfc_target *tgt; | |
1f4a4a19 | 1792 | unsigned long flags; |
6d29cc56 | 1793 | |
1f4a4a19 | 1794 | spin_lock_irqsave(vhost->host->host_lock, flags); |
6d29cc56 BK |
1795 | list_for_each_entry(tgt, &vhost->targets, queue) { |
1796 | if (rport == tgt->rport) { | |
ed830385 | 1797 | ibmvfc_del_tgt(tgt); |
6d29cc56 BK |
1798 | break; |
1799 | } | |
1800 | } | |
1801 | ||
1802 | ibmvfc_reinit_host(vhost); | |
1f4a4a19 | 1803 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
6d29cc56 BK |
1804 | } |
1805 | ||
072b91f9 BK |
1806 | /** |
1807 | * ibmvfc_scsi_done - Handle responses from commands | |
1808 | * @evt: ibmvfc event to be handled | |
1809 | * | |
1810 | * Used as a callback when sending scsi cmds. | |
1811 | **/ | |
1812 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) | |
1813 | { | |
1814 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
5a9d16f7 | 1815 | struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); |
072b91f9 | 1816 | struct scsi_cmnd *cmnd = evt->cmnd; |
2bac406d | 1817 | u32 rsp_len = 0; |
0aab6c3f | 1818 | u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); |
072b91f9 BK |
1819 | |
1820 | if (cmnd) { | |
0aab6c3f TD |
1821 | if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) |
1822 | scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); | |
072b91f9 | 1823 | else if (rsp->flags & FCP_RESID_UNDER) |
0aab6c3f | 1824 | scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); |
072b91f9 BK |
1825 | else |
1826 | scsi_set_resid(cmnd, 0); | |
1827 | ||
1828 | if (vfc_cmd->status) { | |
5a9d16f7 | 1829 | cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); |
072b91f9 BK |
1830 | |
1831 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
0aab6c3f | 1832 | rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
072b91f9 BK |
1833 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
1834 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; | |
2bac406d | 1835 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
072b91f9 | 1836 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
0aab6c3f TD |
1837 | if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && |
1838 | (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) | |
6d29cc56 | 1839 | ibmvfc_relogin(cmnd->device); |
072b91f9 | 1840 | |
50119dad BK |
1841 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
1842 | cmnd->result = (DID_ERROR << 16); | |
1843 | ||
072b91f9 BK |
1844 | ibmvfc_log_error(evt); |
1845 | } | |
1846 | ||
1847 | if (!cmnd->result && | |
1848 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) | |
1849 | cmnd->result = (DID_ERROR << 16); | |
1850 | ||
1851 | scsi_dma_unmap(cmnd); | |
1852 | cmnd->scsi_done(cmnd); | |
1853 | } | |
1854 | ||
1855 | ibmvfc_free_event(evt); | |
1856 | } | |
1857 | ||
1858 | /** | |
1859 | * ibmvfc_host_chkready - Check if the host can accept commands | |
1860 | * @vhost: struct ibmvfc host | |
1861 | * | |
1862 | * Returns: | |
1863 | * 1 if host can accept command / 0 if not | |
1864 | **/ | |
1865 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) | |
1866 | { | |
1867 | int result = 0; | |
1868 | ||
1869 | switch (vhost->state) { | |
1870 | case IBMVFC_LINK_DEAD: | |
1871 | case IBMVFC_HOST_OFFLINE: | |
1872 | result = DID_NO_CONNECT << 16; | |
1873 | break; | |
1874 | case IBMVFC_NO_CRQ: | |
1875 | case IBMVFC_INITIALIZING: | |
1876 | case IBMVFC_HALTED: | |
1877 | case IBMVFC_LINK_DOWN: | |
1878 | result = DID_REQUEUE << 16; | |
1879 | break; | |
1880 | case IBMVFC_ACTIVE: | |
1881 | result = 0; | |
1882 | break; | |
f36cfe6a | 1883 | } |
072b91f9 BK |
1884 | |
1885 | return result; | |
1886 | } | |
1887 | ||
fad74a1b TD |
1888 | static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) |
1889 | { | |
1890 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
5a9d16f7 | 1891 | struct ibmvfc_host *vhost = evt->vhost; |
fad74a1b | 1892 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; |
5a9d16f7 TD |
1893 | struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
1894 | struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); | |
1895 | size_t offset; | |
fad74a1b TD |
1896 | |
1897 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); | |
ebc7c74b | 1898 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
5a9d16f7 | 1899 | offset = offsetof(struct ibmvfc_cmd, v2.rsp); |
ebc7c74b TD |
1900 | vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); |
1901 | } else | |
5a9d16f7 | 1902 | offset = offsetof(struct ibmvfc_cmd, v1.rsp); |
fad74a1b | 1903 | vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); |
5a9d16f7 | 1904 | vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); |
fad74a1b | 1905 | vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); |
5a9d16f7 TD |
1906 | vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); |
1907 | vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); | |
fad74a1b TD |
1908 | vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); |
1909 | vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
5a9d16f7 | 1910 | int_to_scsilun(sdev->lun, &iu->lun); |
fad74a1b TD |
1911 | |
1912 | return vfc_cmd; | |
1913 | } | |
1914 | ||
072b91f9 BK |
1915 | /** |
1916 | * ibmvfc_queuecommand - The queuecommand function of the scsi template | |
dd9c7729 | 1917 | * @shost: scsi host struct |
072b91f9 | 1918 | * @cmnd: struct scsi_cmnd to be executed |
072b91f9 BK |
1919 | * |
1920 | * Returns: | |
1921 | * 0 on success / other on failure | |
1922 | **/ | |
654080d0 | 1923 | static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) |
072b91f9 | 1924 | { |
654080d0 | 1925 | struct ibmvfc_host *vhost = shost_priv(shost); |
072b91f9 BK |
1926 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
1927 | struct ibmvfc_cmd *vfc_cmd; | |
5a9d16f7 | 1928 | struct ibmvfc_fcp_cmd_iu *iu; |
072b91f9 | 1929 | struct ibmvfc_event *evt; |
e9ddad78 | 1930 | u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); |
cb72477b | 1931 | u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); |
31750fbd | 1932 | u16 scsi_channel; |
072b91f9 BK |
1933 | int rc; |
1934 | ||
1935 | if (unlikely((rc = fc_remote_port_chkready(rport))) || | |
1936 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1937 | cmnd->result = rc; | |
654080d0 | 1938 | cmnd->scsi_done(cmnd); |
072b91f9 BK |
1939 | return 0; |
1940 | } | |
1941 | ||
1942 | cmnd->result = (DID_OK << 16); | |
31750fbd TD |
1943 | if (vhost->using_channels) { |
1944 | scsi_channel = hwq % vhost->scsi_scrqs.active_queues; | |
1945 | evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); | |
1946 | evt->hwq = hwq % vhost->scsi_scrqs.active_queues; | |
1947 | } else | |
1948 | evt = ibmvfc_get_event(&vhost->crq); | |
1949 | ||
072b91f9 BK |
1950 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); |
1951 | evt->cmnd = cmnd; | |
fad74a1b TD |
1952 | |
1953 | vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); | |
5a9d16f7 | 1954 | iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); |
fad74a1b | 1955 | |
5a9d16f7 TD |
1956 | iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); |
1957 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
072b91f9 | 1958 | |
50668633 | 1959 | if (cmnd->flags & SCMD_TAGGED) { |
6a036ce0 | 1960 | vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); |
5a9d16f7 | 1961 | iu->pri_task_attr = IBMVFC_SIMPLE_TASK; |
072b91f9 BK |
1962 | } |
1963 | ||
901d01c8 | 1964 | vfc_cmd->correlation = cpu_to_be64((u64)evt); |
2aa0102c | 1965 | |
072b91f9 BK |
1966 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) |
1967 | return ibmvfc_send_event(evt, vhost, 0); | |
1968 | ||
1969 | ibmvfc_free_event(evt); | |
1970 | if (rc == -ENOMEM) | |
1971 | return SCSI_MLQUEUE_HOST_BUSY; | |
1972 | ||
1973 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1974 | scmd_printk(KERN_ERR, cmnd, | |
1975 | "Failed to map DMA buffer for command. rc=%d\n", rc); | |
1976 | ||
1977 | cmnd->result = DID_ERROR << 16; | |
654080d0 | 1978 | cmnd->scsi_done(cmnd); |
072b91f9 BK |
1979 | return 0; |
1980 | } | |
1981 | ||
1982 | /** | |
1983 | * ibmvfc_sync_completion - Signal that a synchronous command has completed | |
1984 | * @evt: ibmvfc event struct | |
1985 | * | |
1986 | **/ | |
1987 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) | |
1988 | { | |
1989 | /* copy the response back */ | |
1990 | if (evt->sync_iu) | |
1991 | *evt->sync_iu = *evt->xfer_iu; | |
1992 | ||
1993 | complete(&evt->comp); | |
1994 | } | |
1995 | ||
d31429e1 BK |
1996 | /** |
1997 | * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands | |
1998 | * @evt: struct ibmvfc_event | |
1999 | * | |
2000 | **/ | |
2001 | static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) | |
2002 | { | |
2003 | struct ibmvfc_host *vhost = evt->vhost; | |
2004 | ||
2005 | ibmvfc_free_event(evt); | |
2006 | vhost->aborting_passthru = 0; | |
2007 | dev_info(vhost->dev, "Passthru command cancelled\n"); | |
2008 | } | |
2009 | ||
2010 | /** | |
2011 | * ibmvfc_bsg_timeout - Handle a BSG timeout | |
75cc8cfc | 2012 | * @job: struct bsg_job that timed out |
d31429e1 BK |
2013 | * |
2014 | * Returns: | |
2015 | * 0 on success / other on failure | |
2016 | **/ | |
75cc8cfc | 2017 | static int ibmvfc_bsg_timeout(struct bsg_job *job) |
d31429e1 | 2018 | { |
cd21c605 | 2019 | struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); |
d31429e1 BK |
2020 | unsigned long port_id = (unsigned long)job->dd_data; |
2021 | struct ibmvfc_event *evt; | |
2022 | struct ibmvfc_tmf *tmf; | |
2023 | unsigned long flags; | |
2024 | int rc; | |
2025 | ||
2026 | ENTER; | |
2027 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2028 | if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { | |
2029 | __ibmvfc_reset_host(vhost); | |
2030 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2031 | return 0; | |
2032 | } | |
2033 | ||
2034 | vhost->aborting_passthru = 1; | |
e4b26f3d | 2035 | evt = ibmvfc_get_event(&vhost->crq); |
d31429e1 BK |
2036 | ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); |
2037 | ||
2038 | tmf = &evt->iu.tmf; | |
2039 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
2040 | tmf->common.version = cpu_to_be32(1); |
2041 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
2042 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
2043 | tmf->scsi_id = cpu_to_be64(port_id); | |
2044 | tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); | |
2045 | tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); | |
d31429e1 BK |
2046 | rc = ibmvfc_send_event(evt, vhost, default_timeout); |
2047 | ||
2048 | if (rc != 0) { | |
2049 | vhost->aborting_passthru = 0; | |
2050 | dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); | |
2051 | rc = -EIO; | |
2052 | } else | |
2053 | dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", | |
2054 | port_id); | |
2055 | ||
2056 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2057 | ||
2058 | LEAVE; | |
2059 | return rc; | |
2060 | } | |
2061 | ||
2062 | /** | |
2063 | * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command | |
2064 | * @vhost: struct ibmvfc_host to send command | |
2065 | * @port_id: port ID to send command | |
2066 | * | |
2067 | * Returns: | |
2068 | * 0 on success / other on failure | |
2069 | **/ | |
2070 | static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) | |
2071 | { | |
2072 | struct ibmvfc_port_login *plogi; | |
2073 | struct ibmvfc_target *tgt; | |
2074 | struct ibmvfc_event *evt; | |
2075 | union ibmvfc_iu rsp_iu; | |
2076 | unsigned long flags; | |
2077 | int rc = 0, issue_login = 1; | |
2078 | ||
2079 | ENTER; | |
2080 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2081 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
2082 | if (tgt->scsi_id == port_id) { | |
2083 | issue_login = 0; | |
2084 | break; | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | if (!issue_login) | |
2089 | goto unlock_out; | |
2090 | if (unlikely((rc = ibmvfc_host_chkready(vhost)))) | |
2091 | goto unlock_out; | |
2092 | ||
e4b26f3d | 2093 | evt = ibmvfc_get_event(&vhost->crq); |
d31429e1 BK |
2094 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
2095 | plogi = &evt->iu.plogi; | |
2096 | memset(plogi, 0, sizeof(*plogi)); | |
0aab6c3f TD |
2097 | plogi->common.version = cpu_to_be32(1); |
2098 | plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); | |
2099 | plogi->common.length = cpu_to_be16(sizeof(*plogi)); | |
2100 | plogi->scsi_id = cpu_to_be64(port_id); | |
d31429e1 BK |
2101 | evt->sync_iu = &rsp_iu; |
2102 | init_completion(&evt->comp); | |
2103 | ||
2104 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2105 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2106 | ||
2107 | if (rc) | |
2108 | return -EIO; | |
2109 | ||
2110 | wait_for_completion(&evt->comp); | |
2111 | ||
2112 | if (rsp_iu.plogi.common.status) | |
2113 | rc = -EIO; | |
2114 | ||
2115 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2116 | ibmvfc_free_event(evt); | |
2117 | unlock_out: | |
2118 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2119 | LEAVE; | |
2120 | return rc; | |
2121 | } | |
2122 | ||
2123 | /** | |
2124 | * ibmvfc_bsg_request - Handle a BSG request | |
75cc8cfc | 2125 | * @job: struct bsg_job to be executed |
d31429e1 BK |
2126 | * |
2127 | * Returns: | |
2128 | * 0 on success / other on failure | |
2129 | **/ | |
75cc8cfc | 2130 | static int ibmvfc_bsg_request(struct bsg_job *job) |
d31429e1 | 2131 | { |
cd21c605 | 2132 | struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); |
1d69b122 | 2133 | struct fc_rport *rport = fc_bsg_to_rport(job); |
d31429e1 BK |
2134 | struct ibmvfc_passthru_mad *mad; |
2135 | struct ibmvfc_event *evt; | |
2136 | union ibmvfc_iu rsp_iu; | |
2137 | unsigned long flags, port_id = -1; | |
01e0e15c JT |
2138 | struct fc_bsg_request *bsg_request = job->request; |
2139 | struct fc_bsg_reply *bsg_reply = job->reply; | |
2140 | unsigned int code = bsg_request->msgcode; | |
d31429e1 BK |
2141 | int rc = 0, req_seg, rsp_seg, issue_login = 0; |
2142 | u32 fc_flags, rsp_len; | |
2143 | ||
2144 | ENTER; | |
01e0e15c | 2145 | bsg_reply->reply_payload_rcv_len = 0; |
d31429e1 BK |
2146 | if (rport) |
2147 | port_id = rport->port_id; | |
2148 | ||
2149 | switch (code) { | |
2150 | case FC_BSG_HST_ELS_NOLOGIN: | |
01e0e15c JT |
2151 | port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | |
2152 | (bsg_request->rqst_data.h_els.port_id[1] << 8) | | |
2153 | bsg_request->rqst_data.h_els.port_id[2]; | |
df561f66 | 2154 | fallthrough; |
d31429e1 BK |
2155 | case FC_BSG_RPT_ELS: |
2156 | fc_flags = IBMVFC_FC_ELS; | |
2157 | break; | |
2158 | case FC_BSG_HST_CT: | |
2159 | issue_login = 1; | |
01e0e15c JT |
2160 | port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | |
2161 | (bsg_request->rqst_data.h_ct.port_id[1] << 8) | | |
2162 | bsg_request->rqst_data.h_ct.port_id[2]; | |
df561f66 | 2163 | fallthrough; |
d31429e1 BK |
2164 | case FC_BSG_RPT_CT: |
2165 | fc_flags = IBMVFC_FC_CT_IU; | |
2166 | break; | |
2167 | default: | |
2168 | return -ENOTSUPP; | |
f36cfe6a | 2169 | } |
d31429e1 BK |
2170 | |
2171 | if (port_id == -1) | |
2172 | return -EINVAL; | |
2173 | if (!mutex_trylock(&vhost->passthru_mutex)) | |
2174 | return -EBUSY; | |
2175 | ||
2176 | job->dd_data = (void *)port_id; | |
2177 | req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, | |
2178 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
2179 | ||
2180 | if (!req_seg) { | |
2181 | mutex_unlock(&vhost->passthru_mutex); | |
2182 | return -ENOMEM; | |
2183 | } | |
2184 | ||
2185 | rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, | |
2186 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
2187 | ||
2188 | if (!rsp_seg) { | |
2189 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
2190 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
2191 | mutex_unlock(&vhost->passthru_mutex); | |
2192 | return -ENOMEM; | |
2193 | } | |
2194 | ||
2195 | if (req_seg > 1 || rsp_seg > 1) { | |
2196 | rc = -EINVAL; | |
2197 | goto out; | |
2198 | } | |
2199 | ||
2200 | if (issue_login) | |
2201 | rc = ibmvfc_bsg_plogi(vhost, port_id); | |
2202 | ||
2203 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2204 | ||
2205 | if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || | |
2206 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
2207 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2208 | goto out; | |
2209 | } | |
2210 | ||
e4b26f3d | 2211 | evt = ibmvfc_get_event(&vhost->crq); |
d31429e1 BK |
2212 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
2213 | mad = &evt->iu.passthru; | |
2214 | ||
2215 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
2216 | mad->common.version = cpu_to_be32(1); |
2217 | mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); | |
2218 | mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); | |
2219 | ||
2220 | mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + | |
2221 | offsetof(struct ibmvfc_passthru_mad, iu)); | |
2222 | mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); | |
2223 | ||
2224 | mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); | |
2225 | mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); | |
2226 | mad->iu.flags = cpu_to_be32(fc_flags); | |
2227 | mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); | |
2228 | ||
2229 | mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); | |
2230 | mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); | |
2231 | mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); | |
2232 | mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); | |
2233 | mad->iu.scsi_id = cpu_to_be64(port_id); | |
2234 | mad->iu.tag = cpu_to_be64((u64)evt); | |
2235 | rsp_len = be32_to_cpu(mad->iu.rsp.len); | |
d31429e1 BK |
2236 | |
2237 | evt->sync_iu = &rsp_iu; | |
2238 | init_completion(&evt->comp); | |
2239 | rc = ibmvfc_send_event(evt, vhost, 0); | |
2240 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2241 | ||
2242 | if (rc) { | |
2243 | rc = -EIO; | |
2244 | goto out; | |
2245 | } | |
2246 | ||
2247 | wait_for_completion(&evt->comp); | |
2248 | ||
2249 | if (rsp_iu.passthru.common.status) | |
2250 | rc = -EIO; | |
2251 | else | |
01e0e15c | 2252 | bsg_reply->reply_payload_rcv_len = rsp_len; |
d31429e1 BK |
2253 | |
2254 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2255 | ibmvfc_free_event(evt); | |
2256 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
01e0e15c | 2257 | bsg_reply->result = rc; |
06548160 | 2258 | bsg_job_done(job, bsg_reply->result, |
1abaede7 | 2259 | bsg_reply->reply_payload_rcv_len); |
d31429e1 BK |
2260 | rc = 0; |
2261 | out: | |
2262 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
2263 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
2264 | dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, | |
2265 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
2266 | mutex_unlock(&vhost->passthru_mutex); | |
2267 | LEAVE; | |
2268 | return rc; | |
2269 | } | |
2270 | ||
072b91f9 BK |
2271 | /** |
2272 | * ibmvfc_reset_device - Reset the device with the specified reset type | |
2273 | * @sdev: scsi device to reset | |
2274 | * @type: reset type | |
2275 | * @desc: reset type description for log messages | |
2276 | * | |
2277 | * Returns: | |
2278 | * 0 on success / other on failure | |
2279 | **/ | |
2280 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) | |
2281 | { | |
2282 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
ebc7c74b | 2283 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
072b91f9 | 2284 | struct ibmvfc_cmd *tmf; |
50ed9a00 | 2285 | struct ibmvfc_event *evt = NULL; |
072b91f9 | 2286 | union ibmvfc_iu rsp_iu; |
5a9d16f7 TD |
2287 | struct ibmvfc_fcp_cmd_iu *iu; |
2288 | struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); | |
072b91f9 BK |
2289 | int rsp_rc = -EBUSY; |
2290 | unsigned long flags; | |
2291 | int rsp_code = 0; | |
2292 | ||
2293 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2294 | if (vhost->state == IBMVFC_ACTIVE) { | |
31750fbd TD |
2295 | if (vhost->using_channels) |
2296 | evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); | |
2297 | else | |
2298 | evt = ibmvfc_get_event(&vhost->crq); | |
2299 | ||
072b91f9 | 2300 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
fad74a1b | 2301 | tmf = ibmvfc_init_vfc_cmd(evt, sdev); |
5a9d16f7 | 2302 | iu = ibmvfc_get_fcp_iu(vhost, tmf); |
072b91f9 | 2303 | |
0aab6c3f | 2304 | tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
ebc7c74b TD |
2305 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) |
2306 | tmf->target_wwpn = cpu_to_be64(rport->port_name); | |
5a9d16f7 | 2307 | iu->tmf_flags = type; |
072b91f9 BK |
2308 | evt->sync_iu = &rsp_iu; |
2309 | ||
2310 | init_completion(&evt->comp); | |
2311 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2312 | } | |
2313 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2314 | ||
2315 | if (rsp_rc != 0) { | |
2316 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", | |
2317 | desc, rsp_rc); | |
2318 | return -EIO; | |
2319 | } | |
2320 | ||
2321 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); | |
2322 | wait_for_completion(&evt->comp); | |
2323 | ||
230934a6 | 2324 | if (rsp_iu.cmd.status) |
5a9d16f7 | 2325 | rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); |
230934a6 BK |
2326 | |
2327 | if (rsp_code) { | |
072b91f9 BK |
2328 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
2329 | rsp_code = fc_rsp->data.info.rsp_code; | |
2330 | ||
2331 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " | |
0aab6c3f TD |
2332 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, |
2333 | ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), | |
3e6f7de4 | 2334 | be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, |
072b91f9 BK |
2335 | fc_rsp->scsi_status); |
2336 | rsp_rc = -EIO; | |
2337 | } else | |
2338 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); | |
2339 | ||
2340 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2341 | ibmvfc_free_event(evt); | |
2342 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2343 | return rsp_rc; | |
2344 | } | |
2345 | ||
2346 | /** | |
d2fab5cf BK |
2347 | * ibmvfc_match_rport - Match function for specified remote port |
2348 | * @evt: ibmvfc event struct | |
dd9c7729 | 2349 | * @rport: device to match |
072b91f9 BK |
2350 | * |
2351 | * Returns: | |
d2fab5cf | 2352 | * 1 if event matches rport / 0 if event does not match rport |
072b91f9 | 2353 | **/ |
d2fab5cf | 2354 | static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) |
072b91f9 | 2355 | { |
d2fab5cf | 2356 | struct fc_rport *cmd_rport; |
072b91f9 | 2357 | |
d2fab5cf BK |
2358 | if (evt->cmnd) { |
2359 | cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); | |
2360 | if (cmd_rport == rport) | |
2361 | return 1; | |
072b91f9 | 2362 | } |
d2fab5cf BK |
2363 | return 0; |
2364 | } | |
072b91f9 | 2365 | |
d2fab5cf BK |
2366 | /** |
2367 | * ibmvfc_match_target - Match function for specified target | |
2368 | * @evt: ibmvfc event struct | |
2369 | * @device: device to match (starget) | |
2370 | * | |
2371 | * Returns: | |
2372 | * 1 if event matches starget / 0 if event does not match starget | |
2373 | **/ | |
2374 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) | |
2375 | { | |
2376 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) | |
2377 | return 1; | |
2378 | return 0; | |
2379 | } | |
072b91f9 | 2380 | |
d2fab5cf BK |
2381 | /** |
2382 | * ibmvfc_match_lun - Match function for specified LUN | |
2383 | * @evt: ibmvfc event struct | |
2384 | * @device: device to match (sdev) | |
2385 | * | |
2386 | * Returns: | |
2387 | * 1 if event matches sdev / 0 if event does not match sdev | |
2388 | **/ | |
2389 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) | |
2390 | { | |
2391 | if (evt->cmnd && evt->cmnd->device == device) | |
2392 | return 1; | |
2393 | return 0; | |
2394 | } | |
072b91f9 | 2395 | |
8b1c9b20 TD |
2396 | /** |
2397 | * ibmvfc_event_is_free - Check if event is free or not | |
2398 | * @evt: ibmvfc event struct | |
2399 | * | |
2400 | * Returns: | |
2401 | * true / false | |
2402 | **/ | |
2403 | static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) | |
2404 | { | |
2405 | struct ibmvfc_event *loop_evt; | |
2406 | ||
2407 | list_for_each_entry(loop_evt, &evt->queue->free, queue_list) | |
2408 | if (loop_evt == evt) | |
2409 | return true; | |
2410 | ||
2411 | return false; | |
2412 | } | |
2413 | ||
d2fab5cf BK |
2414 | /** |
2415 | * ibmvfc_wait_for_ops - Wait for ops to complete | |
2416 | * @vhost: ibmvfc host struct | |
2417 | * @device: device to match (starget or sdev) | |
2418 | * @match: match function | |
2419 | * | |
2420 | * Returns: | |
2421 | * SUCCESS / FAILED | |
2422 | **/ | |
2423 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, | |
2424 | int (*match) (struct ibmvfc_event *, void *)) | |
2425 | { | |
2426 | struct ibmvfc_event *evt; | |
2427 | DECLARE_COMPLETION_ONSTACK(comp); | |
62fc2661 | 2428 | int wait, i, q_index, q_size; |
d2fab5cf BK |
2429 | unsigned long flags; |
2430 | signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; | |
62fc2661 | 2431 | struct ibmvfc_queue *queues; |
072b91f9 | 2432 | |
d2fab5cf | 2433 | ENTER; |
62fc2661 TD |
2434 | if (vhost->mq_enabled && vhost->using_channels) { |
2435 | queues = vhost->scsi_scrqs.scrqs; | |
2436 | q_size = vhost->scsi_scrqs.active_queues; | |
2437 | } else { | |
2438 | queues = &vhost->crq; | |
2439 | q_size = 1; | |
2440 | } | |
2441 | ||
d2fab5cf BK |
2442 | do { |
2443 | wait = 0; | |
62fc2661 TD |
2444 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2445 | for (q_index = 0; q_index < q_size; q_index++) { | |
2446 | spin_lock(&queues[q_index].l_lock); | |
2447 | for (i = 0; i < queues[q_index].evt_pool.size; i++) { | |
2448 | evt = &queues[q_index].evt_pool.events[i]; | |
2449 | if (!ibmvfc_event_is_free(evt)) { | |
2450 | if (match(evt, device)) { | |
2451 | evt->eh_comp = ∁ | |
2452 | wait++; | |
2453 | } | |
8b1c9b20 | 2454 | } |
d2fab5cf | 2455 | } |
62fc2661 | 2456 | spin_unlock(&queues[q_index].l_lock); |
d2fab5cf | 2457 | } |
62fc2661 | 2458 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
230934a6 | 2459 | |
d2fab5cf BK |
2460 | if (wait) { |
2461 | timeout = wait_for_completion_timeout(&comp, timeout); | |
072b91f9 | 2462 | |
d2fab5cf BK |
2463 | if (!timeout) { |
2464 | wait = 0; | |
62fc2661 TD |
2465 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2466 | for (q_index = 0; q_index < q_size; q_index++) { | |
2467 | spin_lock(&queues[q_index].l_lock); | |
2468 | for (i = 0; i < queues[q_index].evt_pool.size; i++) { | |
2469 | evt = &queues[q_index].evt_pool.events[i]; | |
2470 | if (!ibmvfc_event_is_free(evt)) { | |
2471 | if (match(evt, device)) { | |
2472 | evt->eh_comp = NULL; | |
2473 | wait++; | |
2474 | } | |
8b1c9b20 | 2475 | } |
d2fab5cf | 2476 | } |
62fc2661 | 2477 | spin_unlock(&queues[q_index].l_lock); |
d2fab5cf | 2478 | } |
62fc2661 | 2479 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
d2fab5cf BK |
2480 | if (wait) |
2481 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); | |
2482 | LEAVE; | |
2483 | return wait ? FAILED : SUCCESS; | |
2484 | } | |
2485 | } | |
2486 | } while (wait); | |
072b91f9 | 2487 | |
d2fab5cf BK |
2488 | LEAVE; |
2489 | return SUCCESS; | |
072b91f9 BK |
2490 | } |
2491 | ||
a61236da TD |
2492 | static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, |
2493 | struct scsi_device *sdev, | |
2494 | int type) | |
2495 | { | |
2496 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2497 | struct scsi_target *starget = scsi_target(sdev); | |
2498 | struct fc_rport *rport = starget_to_rport(starget); | |
2499 | struct ibmvfc_event *evt; | |
2500 | struct ibmvfc_tmf *tmf; | |
2501 | ||
2502 | evt = ibmvfc_get_event(queue); | |
2503 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
2504 | ||
2505 | tmf = &evt->iu.tmf; | |
2506 | memset(tmf, 0, sizeof(*tmf)); | |
2507 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { | |
2508 | tmf->common.version = cpu_to_be32(2); | |
2509 | tmf->target_wwpn = cpu_to_be64(rport->port_name); | |
2510 | } else { | |
2511 | tmf->common.version = cpu_to_be32(1); | |
2512 | } | |
2513 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
2514 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
2515 | tmf->scsi_id = cpu_to_be64(rport->port_id); | |
2516 | int_to_scsilun(sdev->lun, &tmf->lun); | |
2517 | if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) | |
2518 | type &= ~IBMVFC_TMF_SUPPRESS_ABTS; | |
2519 | if (vhost->state == IBMVFC_ACTIVE) | |
2520 | tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); | |
2521 | else | |
2522 | tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); | |
2523 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
2524 | tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); | |
2525 | ||
2526 | init_completion(&evt->comp); | |
2527 | ||
2528 | return evt; | |
2529 | } | |
2530 | ||
a835f386 TD |
2531 | static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) |
2532 | { | |
2533 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2534 | struct ibmvfc_event *evt, *found_evt, *temp; | |
2535 | struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; | |
2536 | unsigned long flags; | |
2537 | int num_hwq, i; | |
2538 | int fail = 0; | |
2539 | LIST_HEAD(cancelq); | |
2540 | u16 status; | |
2541 | ||
2542 | ENTER; | |
2543 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2544 | num_hwq = vhost->scsi_scrqs.active_queues; | |
2545 | for (i = 0; i < num_hwq; i++) { | |
2546 | spin_lock(queues[i].q_lock); | |
2547 | spin_lock(&queues[i].l_lock); | |
2548 | found_evt = NULL; | |
2549 | list_for_each_entry(evt, &queues[i].sent, queue_list) { | |
2550 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2551 | found_evt = evt; | |
2552 | break; | |
2553 | } | |
2554 | } | |
2555 | spin_unlock(&queues[i].l_lock); | |
2556 | ||
2557 | if (found_evt && vhost->logged_in) { | |
2558 | evt = ibmvfc_init_tmf(&queues[i], sdev, type); | |
2559 | evt->sync_iu = &queues[i].cancel_rsp; | |
2560 | ibmvfc_send_event(evt, vhost, default_timeout); | |
2561 | list_add_tail(&evt->cancel, &cancelq); | |
2562 | } | |
2563 | ||
2564 | spin_unlock(queues[i].q_lock); | |
2565 | } | |
2566 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2567 | ||
2568 | if (list_empty(&cancelq)) { | |
2569 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2570 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
2571 | return 0; | |
2572 | } | |
2573 | ||
2574 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
2575 | ||
2576 | list_for_each_entry_safe(evt, temp, &cancelq, cancel) { | |
2577 | wait_for_completion(&evt->comp); | |
2578 | status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); | |
2579 | list_del(&evt->cancel); | |
2580 | ibmvfc_free_event(evt); | |
2581 | ||
2582 | if (status != IBMVFC_MAD_SUCCESS) { | |
2583 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
2584 | switch (status) { | |
2585 | case IBMVFC_MAD_DRIVER_FAILED: | |
2586 | case IBMVFC_MAD_CRQ_ERROR: | |
2587 | /* Host adapter most likely going through reset, return success to | |
2588 | * the caller will wait for the command being cancelled to get returned | |
2589 | */ | |
2590 | break; | |
2591 | default: | |
2592 | fail = 1; | |
2593 | break; | |
2594 | } | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | if (fail) | |
2599 | return -EIO; | |
2600 | ||
2601 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
2602 | LEAVE; | |
2603 | return 0; | |
2604 | } | |
2605 | ||
2606 | static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) | |
072b91f9 BK |
2607 | { |
2608 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 BK |
2609 | struct ibmvfc_event *evt, *found_evt; |
2610 | union ibmvfc_iu rsp; | |
2611 | int rsp_rc = -EBUSY; | |
2612 | unsigned long flags; | |
2613 | u16 status; | |
2614 | ||
2615 | ENTER; | |
072b91f9 | 2616 | found_evt = NULL; |
57e80e0b TD |
2617 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2618 | spin_lock(&vhost->crq.l_lock); | |
e4b26f3d | 2619 | list_for_each_entry(evt, &vhost->crq.sent, queue_list) { |
072b91f9 BK |
2620 | if (evt->cmnd && evt->cmnd->device == sdev) { |
2621 | found_evt = evt; | |
2622 | break; | |
2623 | } | |
2624 | } | |
57e80e0b | 2625 | spin_unlock(&vhost->crq.l_lock); |
072b91f9 BK |
2626 | |
2627 | if (!found_evt) { | |
2628 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2629 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
2630 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2631 | return 0; | |
2632 | } | |
2633 | ||
55d29bf0 | 2634 | if (vhost->logged_in) { |
a61236da | 2635 | evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); |
072b91f9 | 2636 | evt->sync_iu = &rsp; |
072b91f9 BK |
2637 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
2638 | } | |
2639 | ||
2640 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2641 | ||
2642 | if (rsp_rc != 0) { | |
2643 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); | |
c281e32a BK |
2644 | /* If failure is received, the host adapter is most likely going |
2645 | through reset, return success so the caller will wait for the command | |
2646 | being cancelled to get returned */ | |
2647 | return 0; | |
072b91f9 BK |
2648 | } |
2649 | ||
2650 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
2651 | ||
2652 | wait_for_completion(&evt->comp); | |
0aab6c3f | 2653 | status = be16_to_cpu(rsp.mad_common.status); |
072b91f9 BK |
2654 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2655 | ibmvfc_free_event(evt); | |
2656 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2657 | ||
2658 | if (status != IBMVFC_MAD_SUCCESS) { | |
2659 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
c281e32a BK |
2660 | switch (status) { |
2661 | case IBMVFC_MAD_DRIVER_FAILED: | |
2662 | case IBMVFC_MAD_CRQ_ERROR: | |
2663 | /* Host adapter most likely going through reset, return success to | |
2664 | the caller will wait for the command being cancelled to get returned */ | |
2665 | return 0; | |
2666 | default: | |
2667 | return -EIO; | |
2668 | }; | |
072b91f9 BK |
2669 | } |
2670 | ||
2671 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
2672 | return 0; | |
2673 | } | |
2674 | ||
a835f386 TD |
2675 | /** |
2676 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device | |
2677 | * @sdev: scsi device to cancel commands | |
2678 | * @type: type of error recovery being performed | |
2679 | * | |
2680 | * This sends a cancel to the VIOS for the specified device. This does | |
2681 | * NOT send any abort to the actual device. That must be done separately. | |
2682 | * | |
2683 | * Returns: | |
2684 | * 0 on success / other on failure | |
2685 | **/ | |
2686 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) | |
2687 | { | |
2688 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2689 | ||
2690 | if (vhost->mq_enabled && vhost->using_channels) | |
2691 | return ibmvfc_cancel_all_mq(sdev, type); | |
2692 | else | |
2693 | return ibmvfc_cancel_all_sq(sdev, type); | |
2694 | } | |
2695 | ||
ad8dcffa | 2696 | /** |
d2fab5cf | 2697 | * ibmvfc_match_key - Match function for specified cancel key |
ad8dcffa | 2698 | * @evt: ibmvfc event struct |
d2fab5cf | 2699 | * @key: cancel key to match |
ad8dcffa BK |
2700 | * |
2701 | * Returns: | |
d2fab5cf | 2702 | * 1 if event matches key / 0 if event does not match key |
ad8dcffa | 2703 | **/ |
d2fab5cf | 2704 | static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) |
ad8dcffa | 2705 | { |
d2fab5cf | 2706 | unsigned long cancel_key = (unsigned long)key; |
ad8dcffa | 2707 | |
d2fab5cf | 2708 | if (evt->crq.format == IBMVFC_CMD_FORMAT && |
0aab6c3f | 2709 | be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) |
ad8dcffa BK |
2710 | return 1; |
2711 | return 0; | |
2712 | } | |
2713 | ||
a077c7fa BK |
2714 | /** |
2715 | * ibmvfc_match_evt - Match function for specified event | |
2716 | * @evt: ibmvfc event struct | |
2717 | * @match: event to match | |
2718 | * | |
2719 | * Returns: | |
2720 | * 1 if event matches key / 0 if event does not match key | |
2721 | **/ | |
2722 | static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) | |
2723 | { | |
2724 | if (evt == match) | |
2725 | return 1; | |
2726 | return 0; | |
2727 | } | |
2728 | ||
ad8dcffa | 2729 | /** |
d2fab5cf BK |
2730 | * ibmvfc_abort_task_set - Abort outstanding commands to the device |
2731 | * @sdev: scsi device to abort commands | |
2732 | * | |
2733 | * This sends an Abort Task Set to the VIOS for the specified device. This does | |
2734 | * NOT send any cancel to the VIOS. That must be done separately. | |
ad8dcffa BK |
2735 | * |
2736 | * Returns: | |
d2fab5cf | 2737 | * 0 on success / other on failure |
ad8dcffa | 2738 | **/ |
d2fab5cf | 2739 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
ad8dcffa | 2740 | { |
d2fab5cf | 2741 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
ebc7c74b | 2742 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
d2fab5cf BK |
2743 | struct ibmvfc_cmd *tmf; |
2744 | struct ibmvfc_event *evt, *found_evt; | |
2745 | union ibmvfc_iu rsp_iu; | |
5a9d16f7 TD |
2746 | struct ibmvfc_fcp_cmd_iu *iu; |
2747 | struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); | |
d2fab5cf BK |
2748 | int rc, rsp_rc = -EBUSY; |
2749 | unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; | |
2750 | int rsp_code = 0; | |
ad8dcffa | 2751 | |
d2fab5cf | 2752 | found_evt = NULL; |
57e80e0b TD |
2753 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2754 | spin_lock(&vhost->crq.l_lock); | |
e4b26f3d | 2755 | list_for_each_entry(evt, &vhost->crq.sent, queue_list) { |
d2fab5cf BK |
2756 | if (evt->cmnd && evt->cmnd->device == sdev) { |
2757 | found_evt = evt; | |
2758 | break; | |
ad8dcffa | 2759 | } |
d2fab5cf | 2760 | } |
57e80e0b | 2761 | spin_unlock(&vhost->crq.l_lock); |
d2fab5cf BK |
2762 | |
2763 | if (!found_evt) { | |
2764 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2765 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); | |
ad8dcffa | 2766 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
d2fab5cf BK |
2767 | return 0; |
2768 | } | |
ad8dcffa | 2769 | |
d2fab5cf | 2770 | if (vhost->state == IBMVFC_ACTIVE) { |
e4b26f3d | 2771 | evt = ibmvfc_get_event(&vhost->crq); |
d2fab5cf | 2772 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
fad74a1b | 2773 | tmf = ibmvfc_init_vfc_cmd(evt, sdev); |
5a9d16f7 | 2774 | iu = ibmvfc_get_fcp_iu(vhost, tmf); |
ad8dcffa | 2775 | |
ebc7c74b TD |
2776 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) |
2777 | tmf->target_wwpn = cpu_to_be64(rport->port_name); | |
5a9d16f7 | 2778 | iu->tmf_flags = IBMVFC_ABORT_TASK_SET; |
0aab6c3f | 2779 | tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
d2fab5cf BK |
2780 | evt->sync_iu = &rsp_iu; |
2781 | ||
901d01c8 | 2782 | tmf->correlation = cpu_to_be64((u64)evt); |
2aa0102c | 2783 | |
d2fab5cf BK |
2784 | init_completion(&evt->comp); |
2785 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2786 | } | |
2787 | ||
2788 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2789 | ||
2790 | if (rsp_rc != 0) { | |
2791 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); | |
2792 | return -EIO; | |
2793 | } | |
2794 | ||
2795 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); | |
2796 | timeout = wait_for_completion_timeout(&evt->comp, timeout); | |
2797 | ||
2798 | if (!timeout) { | |
f8804b72 | 2799 | rc = ibmvfc_cancel_all(sdev, 0); |
d2fab5cf BK |
2800 | if (!rc) { |
2801 | rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); | |
2802 | if (rc == SUCCESS) | |
2803 | rc = 0; | |
ad8dcffa | 2804 | } |
ad8dcffa | 2805 | |
d2fab5cf BK |
2806 | if (rc) { |
2807 | sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); | |
2808 | ibmvfc_reset_host(vhost); | |
a077c7fa BK |
2809 | rsp_rc = -EIO; |
2810 | rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); | |
2811 | ||
2812 | if (rc == SUCCESS) | |
2813 | rsp_rc = 0; | |
2814 | ||
2815 | rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); | |
2816 | if (rc != SUCCESS) { | |
2817 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2818 | ibmvfc_hard_reset_host(vhost); | |
2819 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2820 | rsp_rc = 0; | |
2821 | } | |
2822 | ||
d2fab5cf BK |
2823 | goto out; |
2824 | } | |
2825 | } | |
2826 | ||
2827 | if (rsp_iu.cmd.status) | |
5a9d16f7 | 2828 | rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); |
d2fab5cf BK |
2829 | |
2830 | if (rsp_code) { | |
2831 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
2832 | rsp_code = fc_rsp->data.info.rsp_code; | |
2833 | ||
2834 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " | |
2835 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
0aab6c3f | 2836 | ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), |
3e6f7de4 | 2837 | be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, |
d2fab5cf BK |
2838 | fc_rsp->scsi_status); |
2839 | rsp_rc = -EIO; | |
2840 | } else | |
2841 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); | |
2842 | ||
2843 | out: | |
2844 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2845 | ibmvfc_free_event(evt); | |
2846 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2847 | return rsp_rc; | |
ad8dcffa BK |
2848 | } |
2849 | ||
072b91f9 BK |
2850 | /** |
2851 | * ibmvfc_eh_abort_handler - Abort a command | |
2852 | * @cmd: scsi command to abort | |
2853 | * | |
2854 | * Returns: | |
93631b4a | 2855 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2856 | **/ |
2857 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) | |
2858 | { | |
ad8dcffa BK |
2859 | struct scsi_device *sdev = cmd->device; |
2860 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
55d29bf0 | 2861 | int cancel_rc, block_rc; |
ad8dcffa | 2862 | int rc = FAILED; |
072b91f9 BK |
2863 | |
2864 | ENTER; | |
93631b4a | 2865 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2866 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2867 | if (block_rc != FAST_IO_FAIL) { |
2868 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); | |
55d29bf0 | 2869 | ibmvfc_abort_task_set(sdev); |
93631b4a | 2870 | } else |
90f725db | 2871 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
072b91f9 | 2872 | |
55d29bf0 | 2873 | if (!cancel_rc) |
ad8dcffa | 2874 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
072b91f9 | 2875 | |
93631b4a BK |
2876 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2877 | rc = FAST_IO_FAIL; | |
2878 | ||
072b91f9 | 2879 | LEAVE; |
ad8dcffa | 2880 | return rc; |
072b91f9 BK |
2881 | } |
2882 | ||
2883 | /** | |
2884 | * ibmvfc_eh_device_reset_handler - Reset a single LUN | |
2885 | * @cmd: scsi command struct | |
2886 | * | |
2887 | * Returns: | |
93631b4a | 2888 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2889 | **/ |
2890 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) | |
2891 | { | |
ad8dcffa BK |
2892 | struct scsi_device *sdev = cmd->device; |
2893 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
93631b4a | 2894 | int cancel_rc, block_rc, reset_rc = 0; |
ad8dcffa | 2895 | int rc = FAILED; |
072b91f9 BK |
2896 | |
2897 | ENTER; | |
93631b4a | 2898 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2899 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2900 | if (block_rc != FAST_IO_FAIL) { |
2901 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); | |
2902 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); | |
2903 | } else | |
90f725db | 2904 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
072b91f9 | 2905 | |
ad8dcffa BK |
2906 | if (!cancel_rc && !reset_rc) |
2907 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 | 2908 | |
93631b4a BK |
2909 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2910 | rc = FAST_IO_FAIL; | |
2911 | ||
072b91f9 | 2912 | LEAVE; |
ad8dcffa | 2913 | return rc; |
072b91f9 BK |
2914 | } |
2915 | ||
93631b4a BK |
2916 | /** |
2917 | * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function | |
2918 | * @sdev: scsi device struct | |
2919 | * @data: return code | |
2920 | * | |
2921 | **/ | |
2922 | static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) | |
2923 | { | |
2924 | unsigned long *rc = data; | |
90f725db | 2925 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
93631b4a BK |
2926 | } |
2927 | ||
4a5c4a5e BK |
2928 | /** |
2929 | * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function | |
2930 | * @sdev: scsi device struct | |
2931 | * @data: return code | |
2932 | * | |
2933 | **/ | |
2934 | static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) | |
072b91f9 BK |
2935 | { |
2936 | unsigned long *rc = data; | |
2937 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); | |
2938 | } | |
2939 | ||
072b91f9 BK |
2940 | /** |
2941 | * ibmvfc_eh_target_reset_handler - Reset the target | |
2942 | * @cmd: scsi command struct | |
2943 | * | |
2944 | * Returns: | |
93631b4a | 2945 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2946 | **/ |
2947 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) | |
2948 | { | |
ad8dcffa BK |
2949 | struct scsi_device *sdev = cmd->device; |
2950 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2951 | struct scsi_target *starget = scsi_target(sdev); | |
93631b4a BK |
2952 | int block_rc; |
2953 | int reset_rc = 0; | |
ad8dcffa | 2954 | int rc = FAILED; |
072b91f9 | 2955 | unsigned long cancel_rc = 0; |
072b91f9 BK |
2956 | |
2957 | ENTER; | |
93631b4a | 2958 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2959 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2960 | if (block_rc != FAST_IO_FAIL) { |
2961 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); | |
2962 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); | |
2963 | } else | |
2964 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); | |
072b91f9 | 2965 | |
ad8dcffa BK |
2966 | if (!cancel_rc && !reset_rc) |
2967 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
072b91f9 | 2968 | |
93631b4a BK |
2969 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2970 | rc = FAST_IO_FAIL; | |
2971 | ||
072b91f9 | 2972 | LEAVE; |
ad8dcffa | 2973 | return rc; |
072b91f9 BK |
2974 | } |
2975 | ||
2976 | /** | |
2977 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server | |
2978 | * @cmd: struct scsi_cmnd having problems | |
2979 | * | |
2980 | **/ | |
2981 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) | |
2982 | { | |
8d8a3f59 | 2983 | int rc; |
072b91f9 BK |
2984 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
2985 | ||
2986 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); | |
2987 | rc = ibmvfc_issue_fc_host_lip(vhost->host); | |
93631b4a | 2988 | |
072b91f9 BK |
2989 | return rc ? FAILED : SUCCESS; |
2990 | } | |
2991 | ||
2992 | /** | |
2993 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. | |
2994 | * @rport: rport struct | |
2995 | * | |
2996 | * Return value: | |
2997 | * none | |
2998 | **/ | |
2999 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) | |
3000 | { | |
d2fab5cf | 3001 | struct Scsi_Host *shost = rport_to_shost(rport); |
072b91f9 | 3002 | struct ibmvfc_host *vhost = shost_priv(shost); |
d2fab5cf BK |
3003 | struct fc_rport *dev_rport; |
3004 | struct scsi_device *sdev; | |
4b29cb61 BK |
3005 | struct ibmvfc_target *tgt; |
3006 | unsigned long rc, flags; | |
3007 | unsigned int found; | |
072b91f9 BK |
3008 | |
3009 | ENTER; | |
d2fab5cf BK |
3010 | shost_for_each_device(sdev, shost) { |
3011 | dev_rport = starget_to_rport(scsi_target(sdev)); | |
3012 | if (dev_rport != rport) | |
3013 | continue; | |
90f725db | 3014 | ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
d2fab5cf | 3015 | } |
072b91f9 | 3016 | |
d2fab5cf | 3017 | rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); |
ad8dcffa BK |
3018 | |
3019 | if (rc == FAILED) | |
072b91f9 | 3020 | ibmvfc_issue_fc_host_lip(shost); |
4b29cb61 BK |
3021 | |
3022 | spin_lock_irqsave(shost->host_lock, flags); | |
3023 | found = 0; | |
3024 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3025 | if (tgt->scsi_id == rport->port_id) { | |
3026 | found++; | |
3027 | break; | |
3028 | } | |
3029 | } | |
3030 | ||
3031 | if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { | |
3032 | /* | |
3033 | * If we get here, that means we previously attempted to send | |
3034 | * an implicit logout to the target but it failed, most likely | |
3035 | * due to I/O being pending, so we need to send it again | |
3036 | */ | |
3037 | ibmvfc_del_tgt(tgt); | |
3038 | ibmvfc_reinit_host(vhost); | |
3039 | } | |
3040 | ||
3041 | spin_unlock_irqrestore(shost->host_lock, flags); | |
072b91f9 BK |
3042 | LEAVE; |
3043 | } | |
3044 | ||
d99e5f48 | 3045 | static const struct ibmvfc_async_desc ae_desc [] = { |
402c6eec RJ |
3046 | { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
3047 | { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
3048 | { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
3049 | { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
3050 | { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
3051 | { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3052 | { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3053 | { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3054 | { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3055 | { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3056 | { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3057 | { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, | |
3058 | { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, | |
072b91f9 BK |
3059 | }; |
3060 | ||
d99e5f48 | 3061 | static const struct ibmvfc_async_desc unknown_ae = { |
402c6eec | 3062 | "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL |
d99e5f48 | 3063 | }; |
072b91f9 BK |
3064 | |
3065 | /** | |
3066 | * ibmvfc_get_ae_desc - Get text description for async event | |
3067 | * @ae: async event | |
3068 | * | |
3069 | **/ | |
d99e5f48 | 3070 | static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) |
072b91f9 BK |
3071 | { |
3072 | int i; | |
3073 | ||
3074 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) | |
3075 | if (ae_desc[i].ae == ae) | |
d99e5f48 BK |
3076 | return &ae_desc[i]; |
3077 | ||
3078 | return &unknown_ae; | |
3079 | } | |
3080 | ||
3081 | static const struct { | |
3082 | enum ibmvfc_ae_link_state state; | |
3083 | const char *desc; | |
3084 | } link_desc [] = { | |
3085 | { IBMVFC_AE_LS_LINK_UP, " link up" }, | |
3086 | { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, | |
3087 | { IBMVFC_AE_LS_LINK_DOWN, " link down" }, | |
3088 | { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, | |
3089 | }; | |
3090 | ||
3091 | /** | |
3092 | * ibmvfc_get_link_state - Get text description for link state | |
3093 | * @state: link state | |
3094 | * | |
3095 | **/ | |
3096 | static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) | |
3097 | { | |
3098 | int i; | |
3099 | ||
3100 | for (i = 0; i < ARRAY_SIZE(link_desc); i++) | |
3101 | if (link_desc[i].state == state) | |
3102 | return link_desc[i].desc; | |
072b91f9 | 3103 | |
d99e5f48 | 3104 | return ""; |
072b91f9 BK |
3105 | } |
3106 | ||
3107 | /** | |
3108 | * ibmvfc_handle_async - Handle an async event from the adapter | |
3109 | * @crq: crq to process | |
3110 | * @vhost: ibmvfc host struct | |
3111 | * | |
3112 | **/ | |
3113 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, | |
3114 | struct ibmvfc_host *vhost) | |
3115 | { | |
0aab6c3f | 3116 | const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); |
6d29cc56 | 3117 | struct ibmvfc_target *tgt; |
072b91f9 | 3118 | |
d99e5f48 | 3119 | ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," |
21367e20 TD |
3120 | " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), |
3121 | be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), | |
d99e5f48 | 3122 | ibmvfc_get_link_state(crq->link_state)); |
072b91f9 | 3123 | |
0aab6c3f | 3124 | switch (be64_to_cpu(crq->event)) { |
072b91f9 | 3125 | case IBMVFC_AE_RESUME: |
497f9c50 BK |
3126 | switch (crq->link_state) { |
3127 | case IBMVFC_AE_LS_LINK_DOWN: | |
3128 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
3129 | break; | |
3130 | case IBMVFC_AE_LS_LINK_DEAD: | |
3131 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3132 | break; | |
3133 | case IBMVFC_AE_LS_LINK_UP: | |
3134 | case IBMVFC_AE_LS_LINK_BOUNCED: | |
3135 | default: | |
3136 | vhost->events_to_log |= IBMVFC_AE_LINKUP; | |
3137 | vhost->delay_init = 1; | |
3138 | __ibmvfc_reset_host(vhost); | |
3139 | break; | |
f36cfe6a | 3140 | } |
497f9c50 BK |
3141 | |
3142 | break; | |
3143 | case IBMVFC_AE_LINK_UP: | |
072b91f9 | 3144 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
d2131b33 BK |
3145 | vhost->delay_init = 1; |
3146 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
3147 | break; |
3148 | case IBMVFC_AE_SCN_FABRIC: | |
d2131b33 | 3149 | case IBMVFC_AE_SCN_DOMAIN: |
072b91f9 | 3150 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
5cdf1626 BK |
3151 | if (vhost->state < IBMVFC_HALTED) { |
3152 | vhost->delay_init = 1; | |
3153 | __ibmvfc_reset_host(vhost); | |
3154 | } | |
072b91f9 BK |
3155 | break; |
3156 | case IBMVFC_AE_SCN_NPORT: | |
3157 | case IBMVFC_AE_SCN_GROUP: | |
072b91f9 | 3158 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
6d29cc56 BK |
3159 | ibmvfc_reinit_host(vhost); |
3160 | break; | |
072b91f9 BK |
3161 | case IBMVFC_AE_ELS_LOGO: |
3162 | case IBMVFC_AE_ELS_PRLO: | |
3163 | case IBMVFC_AE_ELS_PLOGI: | |
6d29cc56 BK |
3164 | list_for_each_entry(tgt, &vhost->targets, queue) { |
3165 | if (!crq->scsi_id && !crq->wwpn && !crq->node_name) | |
3166 | break; | |
0aab6c3f | 3167 | if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) |
6d29cc56 | 3168 | continue; |
0aab6c3f | 3169 | if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) |
6d29cc56 | 3170 | continue; |
0aab6c3f | 3171 | if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) |
6d29cc56 | 3172 | continue; |
0aab6c3f | 3173 | if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) |
017b2ae3 | 3174 | tgt->logo_rcvd = 1; |
0aab6c3f | 3175 | if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { |
ed830385 | 3176 | ibmvfc_del_tgt(tgt); |
017b2ae3 BK |
3177 | ibmvfc_reinit_host(vhost); |
3178 | } | |
6d29cc56 | 3179 | } |
072b91f9 BK |
3180 | break; |
3181 | case IBMVFC_AE_LINK_DOWN: | |
3182 | case IBMVFC_AE_ADAPTER_FAILED: | |
3183 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
3184 | break; | |
3185 | case IBMVFC_AE_LINK_DEAD: | |
3186 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3187 | break; | |
3188 | case IBMVFC_AE_HALT: | |
3189 | ibmvfc_link_down(vhost, IBMVFC_HALTED); | |
3190 | break; | |
3191 | default: | |
775a42ec | 3192 | dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
072b91f9 | 3193 | break; |
f36cfe6a | 3194 | } |
072b91f9 BK |
3195 | } |
3196 | ||
3197 | /** | |
3198 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ | |
3199 | * @crq: Command/Response queue | |
3200 | * @vhost: ibmvfc host struct | |
dd9c7729 | 3201 | * @evt_doneq: Event done queue |
072b91f9 | 3202 | * |
dd9c7729 | 3203 | **/ |
1f4a4a19 TD |
3204 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, |
3205 | struct list_head *evt_doneq) | |
072b91f9 BK |
3206 | { |
3207 | long rc; | |
0aab6c3f | 3208 | struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); |
072b91f9 BK |
3209 | |
3210 | switch (crq->valid) { | |
3211 | case IBMVFC_CRQ_INIT_RSP: | |
3212 | switch (crq->format) { | |
3213 | case IBMVFC_CRQ_INIT: | |
3214 | dev_info(vhost->dev, "Partner initialized\n"); | |
3215 | /* Send back a response */ | |
3216 | rc = ibmvfc_send_crq_init_complete(vhost); | |
3217 | if (rc == 0) | |
861890c6 | 3218 | ibmvfc_init_host(vhost); |
072b91f9 BK |
3219 | else |
3220 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); | |
3221 | break; | |
3222 | case IBMVFC_CRQ_INIT_COMPLETE: | |
3223 | dev_info(vhost->dev, "Partner initialization complete\n"); | |
861890c6 | 3224 | ibmvfc_init_host(vhost); |
072b91f9 BK |
3225 | break; |
3226 | default: | |
3227 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); | |
3228 | } | |
3229 | return; | |
3230 | case IBMVFC_CRQ_XPORT_EVENT: | |
3231 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 3232 | vhost->logged_in = 0; |
072b91f9 BK |
3233 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
3234 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { | |
3235 | /* We need to re-setup the interpartition connection */ | |
d6e2635b | 3236 | dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); |
072b91f9 BK |
3237 | vhost->client_migrated = 1; |
3238 | ibmvfc_purge_requests(vhost, DID_REQUEUE); | |
73ee5d86 BK |
3239 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
3240 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); | |
d6e2635b TD |
3241 | } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { |
3242 | dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); | |
072b91f9 | 3243 | ibmvfc_purge_requests(vhost, DID_ERROR); |
73ee5d86 BK |
3244 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
3245 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); | |
d6e2635b TD |
3246 | } else { |
3247 | dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); | |
072b91f9 BK |
3248 | } |
3249 | return; | |
3250 | case IBMVFC_CRQ_CMD_RSP: | |
3251 | break; | |
3252 | default: | |
3253 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); | |
3254 | return; | |
3255 | } | |
3256 | ||
3257 | if (crq->format == IBMVFC_ASYNC_EVENT) | |
3258 | return; | |
3259 | ||
3260 | /* The only kind of payload CRQs we should get are responses to | |
3261 | * things we send. Make sure this response is to something we | |
3262 | * actually sent | |
3263 | */ | |
e4b26f3d | 3264 | if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { |
775a42ec | 3265 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
072b91f9 BK |
3266 | crq->ioba); |
3267 | return; | |
3268 | } | |
3269 | ||
a264cf5e | 3270 | if (unlikely(atomic_dec_if_positive(&evt->active))) { |
775a42ec | 3271 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
072b91f9 BK |
3272 | crq->ioba); |
3273 | return; | |
3274 | } | |
3275 | ||
57e80e0b | 3276 | spin_lock(&evt->queue->l_lock); |
1f4a4a19 | 3277 | list_move_tail(&evt->queue_list, evt_doneq); |
57e80e0b | 3278 | spin_unlock(&evt->queue->l_lock); |
072b91f9 BK |
3279 | } |
3280 | ||
3281 | /** | |
3282 | * ibmvfc_scan_finished - Check if the device scan is done. | |
3283 | * @shost: scsi host struct | |
3284 | * @time: current elapsed time | |
3285 | * | |
3286 | * Returns: | |
3287 | * 0 if scan is not done / 1 if scan is done | |
3288 | **/ | |
3289 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
3290 | { | |
3291 | unsigned long flags; | |
3292 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3293 | int done = 0; | |
3294 | ||
3295 | spin_lock_irqsave(shost->host_lock, flags); | |
7a3795f2 HR |
3296 | if (!vhost->scan_timeout) |
3297 | done = 1; | |
3298 | else if (time >= (vhost->scan_timeout * HZ)) { | |
072b91f9 | 3299 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " |
7a3795f2 | 3300 | "continuing initialization\n", vhost->scan_timeout); |
072b91f9 BK |
3301 | done = 1; |
3302 | } | |
3303 | ||
7a3795f2 HR |
3304 | if (vhost->scan_complete) { |
3305 | vhost->scan_timeout = init_timeout; | |
072b91f9 | 3306 | done = 1; |
7a3795f2 | 3307 | } |
072b91f9 BK |
3308 | spin_unlock_irqrestore(shost->host_lock, flags); |
3309 | return done; | |
3310 | } | |
3311 | ||
3312 | /** | |
3313 | * ibmvfc_slave_alloc - Setup the device's task set value | |
3314 | * @sdev: struct scsi_device device to configure | |
3315 | * | |
3316 | * Set the device's task set value so that error handling works as | |
3317 | * expected. | |
3318 | * | |
3319 | * Returns: | |
3320 | * 0 on success / -ENXIO if device does not exist | |
3321 | **/ | |
3322 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) | |
3323 | { | |
3324 | struct Scsi_Host *shost = sdev->host; | |
3325 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
3326 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3327 | unsigned long flags = 0; | |
3328 | ||
3329 | if (!rport || fc_remote_port_chkready(rport)) | |
3330 | return -ENXIO; | |
3331 | ||
3332 | spin_lock_irqsave(shost->host_lock, flags); | |
3333 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; | |
3334 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3335 | return 0; | |
3336 | } | |
3337 | ||
ad8dcffa BK |
3338 | /** |
3339 | * ibmvfc_target_alloc - Setup the target's task set value | |
3340 | * @starget: struct scsi_target | |
3341 | * | |
3342 | * Set the target's task set value so that error handling works as | |
3343 | * expected. | |
3344 | * | |
3345 | * Returns: | |
3346 | * 0 on success / -ENXIO if device does not exist | |
3347 | **/ | |
3348 | static int ibmvfc_target_alloc(struct scsi_target *starget) | |
3349 | { | |
3350 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3351 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3352 | unsigned long flags = 0; | |
3353 | ||
3354 | spin_lock_irqsave(shost->host_lock, flags); | |
3355 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; | |
3356 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3357 | return 0; | |
3358 | } | |
3359 | ||
072b91f9 BK |
3360 | /** |
3361 | * ibmvfc_slave_configure - Configure the device | |
3362 | * @sdev: struct scsi_device device to configure | |
3363 | * | |
3364 | * Enable allow_restart for a device if it is a disk. Adjust the | |
3365 | * queue_depth here also. | |
3366 | * | |
3367 | * Returns: | |
3368 | * 0 | |
3369 | **/ | |
3370 | static int ibmvfc_slave_configure(struct scsi_device *sdev) | |
3371 | { | |
3372 | struct Scsi_Host *shost = sdev->host; | |
072b91f9 BK |
3373 | unsigned long flags = 0; |
3374 | ||
3375 | spin_lock_irqsave(shost->host_lock, flags); | |
76490729 | 3376 | if (sdev->type == TYPE_DISK) { |
072b91f9 | 3377 | sdev->allow_restart = 1; |
76490729 BK |
3378 | blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); |
3379 | } | |
072b91f9 BK |
3380 | spin_unlock_irqrestore(shost->host_lock, flags); |
3381 | return 0; | |
3382 | } | |
3383 | ||
3384 | /** | |
3385 | * ibmvfc_change_queue_depth - Change the device's queue depth | |
3386 | * @sdev: scsi device struct | |
3387 | * @qdepth: depth to set | |
3388 | * | |
3389 | * Return value: | |
3390 | * actual depth set | |
3391 | **/ | |
db5ed4df | 3392 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
072b91f9 BK |
3393 | { |
3394 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) | |
3395 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; | |
3396 | ||
db5ed4df | 3397 | return scsi_change_queue_depth(sdev, qdepth); |
072b91f9 BK |
3398 | } |
3399 | ||
072b91f9 BK |
3400 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
3401 | struct device_attribute *attr, char *buf) | |
3402 | { | |
3403 | struct Scsi_Host *shost = class_to_shost(dev); | |
3404 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3405 | ||
3406 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
3407 | vhost->login_buf->resp.partition_name); | |
3408 | } | |
3409 | ||
072b91f9 BK |
3410 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
3411 | struct device_attribute *attr, char *buf) | |
3412 | { | |
3413 | struct Scsi_Host *shost = class_to_shost(dev); | |
3414 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3415 | ||
3416 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
3417 | vhost->login_buf->resp.device_name); | |
3418 | } | |
3419 | ||
072b91f9 BK |
3420 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
3421 | struct device_attribute *attr, char *buf) | |
3422 | { | |
3423 | struct Scsi_Host *shost = class_to_shost(dev); | |
3424 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3425 | ||
3426 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
3427 | vhost->login_buf->resp.port_loc_code); | |
3428 | } | |
3429 | ||
072b91f9 BK |
3430 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
3431 | struct device_attribute *attr, char *buf) | |
3432 | { | |
3433 | struct Scsi_Host *shost = class_to_shost(dev); | |
3434 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3435 | ||
3436 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
3437 | vhost->login_buf->resp.drc_name); | |
3438 | } | |
3439 | ||
072b91f9 BK |
3440 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
3441 | struct device_attribute *attr, char *buf) | |
3442 | { | |
3443 | struct Scsi_Host *shost = class_to_shost(dev); | |
3444 | struct ibmvfc_host *vhost = shost_priv(shost); | |
61bdb4ee | 3445 | return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); |
072b91f9 BK |
3446 | } |
3447 | ||
497f9c50 BK |
3448 | static ssize_t ibmvfc_show_host_capabilities(struct device *dev, |
3449 | struct device_attribute *attr, char *buf) | |
3450 | { | |
3451 | struct Scsi_Host *shost = class_to_shost(dev); | |
3452 | struct ibmvfc_host *vhost = shost_priv(shost); | |
61bdb4ee | 3453 | return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); |
497f9c50 BK |
3454 | } |
3455 | ||
072b91f9 BK |
3456 | /** |
3457 | * ibmvfc_show_log_level - Show the adapter's error logging level | |
3458 | * @dev: class device struct | |
dd9c7729 | 3459 | * @attr: unused |
072b91f9 BK |
3460 | * @buf: buffer |
3461 | * | |
3462 | * Return value: | |
3463 | * number of bytes printed to buffer | |
3464 | **/ | |
3465 | static ssize_t ibmvfc_show_log_level(struct device *dev, | |
3466 | struct device_attribute *attr, char *buf) | |
3467 | { | |
3468 | struct Scsi_Host *shost = class_to_shost(dev); | |
3469 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3470 | unsigned long flags = 0; | |
3471 | int len; | |
3472 | ||
3473 | spin_lock_irqsave(shost->host_lock, flags); | |
3474 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); | |
3475 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3476 | return len; | |
3477 | } | |
3478 | ||
3479 | /** | |
3480 | * ibmvfc_store_log_level - Change the adapter's error logging level | |
3481 | * @dev: class device struct | |
dd9c7729 | 3482 | * @attr: unused |
072b91f9 | 3483 | * @buf: buffer |
dd9c7729 | 3484 | * @count: buffer size |
072b91f9 BK |
3485 | * |
3486 | * Return value: | |
3487 | * number of bytes printed to buffer | |
3488 | **/ | |
3489 | static ssize_t ibmvfc_store_log_level(struct device *dev, | |
3490 | struct device_attribute *attr, | |
3491 | const char *buf, size_t count) | |
3492 | { | |
3493 | struct Scsi_Host *shost = class_to_shost(dev); | |
3494 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3495 | unsigned long flags = 0; | |
3496 | ||
3497 | spin_lock_irqsave(shost->host_lock, flags); | |
3498 | vhost->log_level = simple_strtoul(buf, NULL, 10); | |
3499 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3500 | return strlen(buf); | |
3501 | } | |
3502 | ||
032d1900 TD |
3503 | static ssize_t ibmvfc_show_scsi_channels(struct device *dev, |
3504 | struct device_attribute *attr, char *buf) | |
3505 | { | |
3506 | struct Scsi_Host *shost = class_to_shost(dev); | |
3507 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3508 | unsigned long flags = 0; | |
3509 | int len; | |
3510 | ||
3511 | spin_lock_irqsave(shost->host_lock, flags); | |
3512 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); | |
3513 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3514 | return len; | |
3515 | } | |
3516 | ||
3517 | static ssize_t ibmvfc_store_scsi_channels(struct device *dev, | |
3518 | struct device_attribute *attr, | |
3519 | const char *buf, size_t count) | |
3520 | { | |
3521 | struct Scsi_Host *shost = class_to_shost(dev); | |
3522 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3523 | unsigned long flags = 0; | |
3524 | unsigned int channels; | |
3525 | ||
3526 | spin_lock_irqsave(shost->host_lock, flags); | |
3527 | channels = simple_strtoul(buf, NULL, 10); | |
3528 | vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); | |
3529 | ibmvfc_hard_reset_host(vhost); | |
3530 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3531 | return strlen(buf); | |
3532 | } | |
3533 | ||
85e2399e BK |
3534 | static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); |
3535 | static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); | |
3536 | static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); | |
3537 | static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); | |
3538 | static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); | |
497f9c50 | 3539 | static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); |
85e2399e BK |
3540 | static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, |
3541 | ibmvfc_show_log_level, ibmvfc_store_log_level); | |
032d1900 TD |
3542 | static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, |
3543 | ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); | |
072b91f9 BK |
3544 | |
3545 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
3546 | /** | |
3547 | * ibmvfc_read_trace - Dump the adapter trace | |
2c3c8bea | 3548 | * @filp: open sysfs file |
072b91f9 BK |
3549 | * @kobj: kobject struct |
3550 | * @bin_attr: bin_attribute struct | |
3551 | * @buf: buffer | |
3552 | * @off: offset | |
3553 | * @count: buffer size | |
3554 | * | |
3555 | * Return value: | |
3556 | * number of bytes printed to buffer | |
3557 | **/ | |
2c3c8bea | 3558 | static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, |
072b91f9 BK |
3559 | struct bin_attribute *bin_attr, |
3560 | char *buf, loff_t off, size_t count) | |
3561 | { | |
18c2a59a | 3562 | struct device *dev = kobj_to_dev(kobj); |
072b91f9 BK |
3563 | struct Scsi_Host *shost = class_to_shost(dev); |
3564 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3565 | unsigned long flags = 0; | |
3566 | int size = IBMVFC_TRACE_SIZE; | |
3567 | char *src = (char *)vhost->trace; | |
3568 | ||
3569 | if (off > size) | |
3570 | return 0; | |
3571 | if (off + count > size) { | |
3572 | size -= off; | |
3573 | count = size; | |
3574 | } | |
3575 | ||
3576 | spin_lock_irqsave(shost->host_lock, flags); | |
3577 | memcpy(buf, &src[off], count); | |
3578 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3579 | return count; | |
3580 | } | |
3581 | ||
3582 | static struct bin_attribute ibmvfc_trace_attr = { | |
3583 | .attr = { | |
3584 | .name = "trace", | |
3585 | .mode = S_IRUGO, | |
3586 | }, | |
3587 | .size = 0, | |
3588 | .read = ibmvfc_read_trace, | |
3589 | }; | |
3590 | #endif | |
3591 | ||
3592 | static struct device_attribute *ibmvfc_attrs[] = { | |
85e2399e BK |
3593 | &dev_attr_partition_name, |
3594 | &dev_attr_device_name, | |
3595 | &dev_attr_port_loc_code, | |
3596 | &dev_attr_drc_name, | |
3597 | &dev_attr_npiv_version, | |
497f9c50 | 3598 | &dev_attr_capabilities, |
85e2399e | 3599 | &dev_attr_log_level, |
032d1900 | 3600 | &dev_attr_nr_scsi_channels, |
072b91f9 BK |
3601 | NULL |
3602 | }; | |
3603 | ||
3604 | static struct scsi_host_template driver_template = { | |
3605 | .module = THIS_MODULE, | |
3606 | .name = "IBM POWER Virtual FC Adapter", | |
3607 | .proc_name = IBMVFC_NAME, | |
3608 | .queuecommand = ibmvfc_queuecommand, | |
b6a05c82 | 3609 | .eh_timed_out = fc_eh_timed_out, |
072b91f9 BK |
3610 | .eh_abort_handler = ibmvfc_eh_abort_handler, |
3611 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, | |
3612 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, | |
3613 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, | |
3614 | .slave_alloc = ibmvfc_slave_alloc, | |
3615 | .slave_configure = ibmvfc_slave_configure, | |
ad8dcffa | 3616 | .target_alloc = ibmvfc_target_alloc, |
072b91f9 BK |
3617 | .scan_finished = ibmvfc_scan_finished, |
3618 | .change_queue_depth = ibmvfc_change_queue_depth, | |
072b91f9 BK |
3619 | .cmd_per_lun = 16, |
3620 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, | |
3621 | .this_id = -1, | |
3622 | .sg_tablesize = SG_ALL, | |
3623 | .max_sectors = IBMVFC_MAX_SECTORS, | |
072b91f9 | 3624 | .shost_attrs = ibmvfc_attrs, |
c40ecc12 | 3625 | .track_queue_depth = 1, |
6ae208e5 | 3626 | .host_tagset = 1, |
072b91f9 BK |
3627 | }; |
3628 | ||
3629 | /** | |
3630 | * ibmvfc_next_async_crq - Returns the next entry in async queue | |
3631 | * @vhost: ibmvfc host struct | |
3632 | * | |
3633 | * Returns: | |
3634 | * Pointer to next entry in queue / NULL if empty | |
3635 | **/ | |
3636 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) | |
3637 | { | |
f8968665 | 3638 | struct ibmvfc_queue *async_crq = &vhost->async_crq; |
072b91f9 BK |
3639 | struct ibmvfc_async_crq *crq; |
3640 | ||
f8968665 | 3641 | crq = &async_crq->msgs.async[async_crq->cur]; |
072b91f9 BK |
3642 | if (crq->valid & 0x80) { |
3643 | if (++async_crq->cur == async_crq->size) | |
3644 | async_crq->cur = 0; | |
f5832fa2 | 3645 | rmb(); |
072b91f9 BK |
3646 | } else |
3647 | crq = NULL; | |
3648 | ||
3649 | return crq; | |
3650 | } | |
3651 | ||
3652 | /** | |
3653 | * ibmvfc_next_crq - Returns the next entry in message queue | |
3654 | * @vhost: ibmvfc host struct | |
3655 | * | |
3656 | * Returns: | |
3657 | * Pointer to next entry in queue / NULL if empty | |
3658 | **/ | |
3659 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) | |
3660 | { | |
f8968665 | 3661 | struct ibmvfc_queue *queue = &vhost->crq; |
072b91f9 BK |
3662 | struct ibmvfc_crq *crq; |
3663 | ||
f8968665 | 3664 | crq = &queue->msgs.crq[queue->cur]; |
072b91f9 BK |
3665 | if (crq->valid & 0x80) { |
3666 | if (++queue->cur == queue->size) | |
3667 | queue->cur = 0; | |
f5832fa2 | 3668 | rmb(); |
072b91f9 BK |
3669 | } else |
3670 | crq = NULL; | |
3671 | ||
3672 | return crq; | |
3673 | } | |
3674 | ||
3675 | /** | |
3676 | * ibmvfc_interrupt - Interrupt handler | |
3677 | * @irq: number of irq to handle, not used | |
3678 | * @dev_instance: ibmvfc_host that received interrupt | |
3679 | * | |
3680 | * Returns: | |
3681 | * IRQ_HANDLED | |
3682 | **/ | |
3683 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) | |
3684 | { | |
3685 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; | |
039a0898 BK |
3686 | unsigned long flags; |
3687 | ||
3688 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3689 | vio_disable_interrupts(to_vio_dev(vhost->dev)); | |
3690 | tasklet_schedule(&vhost->tasklet); | |
3691 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3692 | return IRQ_HANDLED; | |
3693 | } | |
3694 | ||
3695 | /** | |
3696 | * ibmvfc_tasklet - Interrupt handler tasklet | |
3697 | * @data: ibmvfc host struct | |
3698 | * | |
3699 | * Returns: | |
3700 | * Nothing | |
3701 | **/ | |
3702 | static void ibmvfc_tasklet(void *data) | |
3703 | { | |
3704 | struct ibmvfc_host *vhost = data; | |
072b91f9 BK |
3705 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
3706 | struct ibmvfc_crq *crq; | |
3707 | struct ibmvfc_async_crq *async; | |
1f4a4a19 | 3708 | struct ibmvfc_event *evt, *temp; |
072b91f9 BK |
3709 | unsigned long flags; |
3710 | int done = 0; | |
1f4a4a19 | 3711 | LIST_HEAD(evt_doneq); |
072b91f9 BK |
3712 | |
3713 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
57e80e0b | 3714 | spin_lock(vhost->crq.q_lock); |
072b91f9 | 3715 | while (!done) { |
072b91f9 BK |
3716 | /* Pull all the valid messages off the async CRQ */ |
3717 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
3718 | ibmvfc_handle_async(async, vhost); | |
3719 | async->valid = 0; | |
f5832fa2 | 3720 | wmb(); |
072b91f9 BK |
3721 | } |
3722 | ||
f1d7fb7a BK |
3723 | /* Pull all the valid messages off the CRQ */ |
3724 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
1f4a4a19 | 3725 | ibmvfc_handle_crq(crq, vhost, &evt_doneq); |
072b91f9 | 3726 | crq->valid = 0; |
f5832fa2 | 3727 | wmb(); |
f1d7fb7a BK |
3728 | } |
3729 | ||
3730 | vio_enable_interrupts(vdev); | |
3731 | if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
072b91f9 BK |
3732 | vio_disable_interrupts(vdev); |
3733 | ibmvfc_handle_async(async, vhost); | |
4081b77c | 3734 | async->valid = 0; |
f5832fa2 | 3735 | wmb(); |
f1d7fb7a BK |
3736 | } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
3737 | vio_disable_interrupts(vdev); | |
1f4a4a19 | 3738 | ibmvfc_handle_crq(crq, vhost, &evt_doneq); |
f1d7fb7a | 3739 | crq->valid = 0; |
f5832fa2 | 3740 | wmb(); |
072b91f9 BK |
3741 | } else |
3742 | done = 1; | |
3743 | } | |
3744 | ||
57e80e0b | 3745 | spin_unlock(vhost->crq.q_lock); |
072b91f9 | 3746 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
1f4a4a19 TD |
3747 | |
3748 | list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { | |
3749 | del_timer(&evt->timer); | |
3750 | list_del(&evt->queue_list); | |
3751 | ibmvfc_trc_end(evt); | |
3752 | evt->done(evt); | |
3753 | } | |
072b91f9 BK |
3754 | } |
3755 | ||
d20046e6 TD |
3756 | static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) |
3757 | { | |
3758 | struct device *dev = scrq->vhost->dev; | |
3759 | struct vio_dev *vdev = to_vio_dev(dev); | |
3760 | unsigned long rc; | |
3761 | int irq_action = H_ENABLE_VIO_INTERRUPT; | |
3762 | ||
3763 | if (!enable) | |
3764 | irq_action = H_DISABLE_VIO_INTERRUPT; | |
3765 | ||
3766 | rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, | |
3767 | scrq->hw_irq, 0, 0); | |
3768 | ||
3769 | if (rc) | |
3770 | dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", | |
3771 | enable ? "enable" : "disable", scrq->hwq_id, rc); | |
3772 | ||
3773 | return rc; | |
3774 | } | |
3775 | ||
1d956ad8 TD |
3776 | static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, |
3777 | struct list_head *evt_doneq) | |
3778 | { | |
3779 | struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); | |
3780 | ||
3781 | switch (crq->valid) { | |
3782 | case IBMVFC_CRQ_CMD_RSP: | |
3783 | break; | |
3784 | case IBMVFC_CRQ_XPORT_EVENT: | |
3785 | return; | |
3786 | default: | |
3787 | dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); | |
3788 | return; | |
3789 | } | |
3790 | ||
3791 | /* The only kind of payload CRQs we should get are responses to | |
3792 | * things we send. Make sure this response is to something we | |
3793 | * actually sent | |
3794 | */ | |
3795 | if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { | |
3796 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", | |
3797 | crq->ioba); | |
3798 | return; | |
3799 | } | |
3800 | ||
a264cf5e | 3801 | if (unlikely(atomic_dec_if_positive(&evt->active))) { |
1d956ad8 TD |
3802 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
3803 | crq->ioba); | |
3804 | return; | |
3805 | } | |
3806 | ||
3807 | spin_lock(&evt->queue->l_lock); | |
3808 | list_move_tail(&evt->queue_list, evt_doneq); | |
3809 | spin_unlock(&evt->queue->l_lock); | |
3810 | } | |
3811 | ||
3812 | static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) | |
3813 | { | |
3814 | struct ibmvfc_crq *crq; | |
3815 | ||
3816 | crq = &scrq->msgs.scrq[scrq->cur].crq; | |
3817 | if (crq->valid & 0x80) { | |
3818 | if (++scrq->cur == scrq->size) | |
3819 | scrq->cur = 0; | |
3820 | rmb(); | |
3821 | } else | |
3822 | crq = NULL; | |
3823 | ||
3824 | return crq; | |
3825 | } | |
3826 | ||
3827 | static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) | |
3828 | { | |
3829 | struct ibmvfc_crq *crq; | |
3830 | struct ibmvfc_event *evt, *temp; | |
3831 | unsigned long flags; | |
3832 | int done = 0; | |
3833 | LIST_HEAD(evt_doneq); | |
3834 | ||
3835 | spin_lock_irqsave(scrq->q_lock, flags); | |
3836 | while (!done) { | |
3837 | while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { | |
3838 | ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); | |
3839 | crq->valid = 0; | |
3840 | wmb(); | |
3841 | } | |
3842 | ||
3843 | ibmvfc_toggle_scrq_irq(scrq, 1); | |
3844 | if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { | |
3845 | ibmvfc_toggle_scrq_irq(scrq, 0); | |
3846 | ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); | |
3847 | crq->valid = 0; | |
3848 | wmb(); | |
3849 | } else | |
3850 | done = 1; | |
3851 | } | |
3852 | spin_unlock_irqrestore(scrq->q_lock, flags); | |
3853 | ||
3854 | list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { | |
3855 | del_timer(&evt->timer); | |
3856 | list_del(&evt->queue_list); | |
3857 | ibmvfc_trc_end(evt); | |
3858 | evt->done(evt); | |
3859 | } | |
3860 | } | |
3861 | ||
80a9e8ea TD |
3862 | static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance) |
3863 | { | |
3864 | struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; | |
3865 | ||
3866 | ibmvfc_toggle_scrq_irq(scrq, 0); | |
3867 | ibmvfc_drain_sub_crq(scrq); | |
3868 | ||
3869 | return IRQ_HANDLED; | |
3870 | } | |
3871 | ||
072b91f9 BK |
3872 | /** |
3873 | * ibmvfc_init_tgt - Set the next init job step for the target | |
3874 | * @tgt: ibmvfc target struct | |
3875 | * @job_step: job step to perform | |
3876 | * | |
3877 | **/ | |
3878 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, | |
3879 | void (*job_step) (struct ibmvfc_target *)) | |
3880 | { | |
ed830385 BK |
3881 | if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) |
3882 | tgt->job_step = job_step; | |
072b91f9 BK |
3883 | wake_up(&tgt->vhost->work_wait_q); |
3884 | } | |
3885 | ||
3886 | /** | |
3887 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization | |
3888 | * @tgt: ibmvfc target struct | |
3889 | * @job_step: initialization job step | |
3890 | * | |
7d0e4622 BK |
3891 | * Returns: 1 if step will be retried / 0 if not |
3892 | * | |
072b91f9 | 3893 | **/ |
7d0e4622 | 3894 | static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
072b91f9 BK |
3895 | void (*job_step) (struct ibmvfc_target *)) |
3896 | { | |
1c41fa82 | 3897 | if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
ed830385 | 3898 | ibmvfc_del_tgt(tgt); |
072b91f9 | 3899 | wake_up(&tgt->vhost->work_wait_q); |
7d0e4622 | 3900 | return 0; |
072b91f9 BK |
3901 | } else |
3902 | ibmvfc_init_tgt(tgt, job_step); | |
7d0e4622 | 3903 | return 1; |
072b91f9 BK |
3904 | } |
3905 | ||
a3b7aeab BK |
3906 | /* Defined in FC-LS */ |
3907 | static const struct { | |
3908 | int code; | |
3909 | int retry; | |
3910 | int logged_in; | |
3911 | } prli_rsp [] = { | |
3912 | { 0, 1, 0 }, | |
3913 | { 1, 0, 1 }, | |
3914 | { 2, 1, 0 }, | |
3915 | { 3, 1, 0 }, | |
3916 | { 4, 0, 0 }, | |
3917 | { 5, 0, 0 }, | |
3918 | { 6, 0, 1 }, | |
3919 | { 7, 0, 0 }, | |
3920 | { 8, 1, 0 }, | |
3921 | }; | |
3922 | ||
3923 | /** | |
3924 | * ibmvfc_get_prli_rsp - Find PRLI response index | |
3925 | * @flags: PRLI response flags | |
3926 | * | |
3927 | **/ | |
3928 | static int ibmvfc_get_prli_rsp(u16 flags) | |
3929 | { | |
3930 | int i; | |
3931 | int code = (flags & 0x0f00) >> 8; | |
3932 | ||
3933 | for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) | |
3934 | if (prli_rsp[i].code == code) | |
3935 | return i; | |
3936 | ||
3937 | return 0; | |
3938 | } | |
3939 | ||
072b91f9 BK |
3940 | /** |
3941 | * ibmvfc_tgt_prli_done - Completion handler for Process Login | |
3942 | * @evt: ibmvfc event struct | |
3943 | * | |
3944 | **/ | |
3945 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) | |
3946 | { | |
3947 | struct ibmvfc_target *tgt = evt->tgt; | |
3948 | struct ibmvfc_host *vhost = evt->vhost; | |
3949 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; | |
a3b7aeab | 3950 | struct ibmvfc_prli_svc_parms *parms = &rsp->parms; |
0aab6c3f | 3951 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3952 | int index, level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3953 | |
3954 | vhost->discovery_threads--; | |
3955 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3956 | switch (status) { | |
3957 | case IBMVFC_MAD_SUCCESS: | |
a3b7aeab BK |
3958 | tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", |
3959 | parms->type, parms->flags, parms->service_parms); | |
3960 | ||
3961 | if (parms->type == IBMVFC_SCSI_FCP_TYPE) { | |
0aab6c3f | 3962 | index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); |
a3b7aeab | 3963 | if (prli_rsp[index].logged_in) { |
0aab6c3f | 3964 | if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { |
a3b7aeab BK |
3965 | tgt->need_login = 0; |
3966 | tgt->ids.roles = 0; | |
0aab6c3f | 3967 | if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) |
a3b7aeab | 3968 | tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; |
0aab6c3f | 3969 | if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) |
a3b7aeab | 3970 | tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; |
43c8da90 | 3971 | tgt->add_rport = 1; |
a3b7aeab | 3972 | } else |
ed830385 | 3973 | ibmvfc_del_tgt(tgt); |
a3b7aeab BK |
3974 | } else if (prli_rsp[index].retry) |
3975 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3976 | else | |
ed830385 | 3977 | ibmvfc_del_tgt(tgt); |
a3b7aeab | 3978 | } else |
ed830385 | 3979 | ibmvfc_del_tgt(tgt); |
072b91f9 BK |
3980 | break; |
3981 | case IBMVFC_MAD_DRIVER_FAILED: | |
3982 | break; | |
3983 | case IBMVFC_MAD_CRQ_ERROR: | |
3984 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3985 | break; | |
3986 | case IBMVFC_MAD_FAILED: | |
3987 | default: | |
0aab6c3f TD |
3988 | if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && |
3989 | be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) | |
017b2ae3 BK |
3990 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
3991 | else if (tgt->logo_rcvd) | |
3992 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
0aab6c3f | 3993 | else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3994 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
10e79499 | 3995 | else |
ed830385 | 3996 | ibmvfc_del_tgt(tgt); |
7d0e4622 BK |
3997 | |
3998 | tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", | |
0aab6c3f | 3999 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3e6f7de4 | 4000 | be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); |
072b91f9 | 4001 | break; |
f36cfe6a | 4002 | } |
072b91f9 BK |
4003 | |
4004 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4005 | ibmvfc_free_event(evt); | |
4006 | wake_up(&vhost->work_wait_q); | |
4007 | } | |
4008 | ||
4009 | /** | |
4010 | * ibmvfc_tgt_send_prli - Send a process login | |
4011 | * @tgt: ibmvfc target struct | |
4012 | * | |
4013 | **/ | |
4014 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) | |
4015 | { | |
4016 | struct ibmvfc_process_login *prli; | |
4017 | struct ibmvfc_host *vhost = tgt->vhost; | |
4018 | struct ibmvfc_event *evt; | |
4019 | ||
4020 | if (vhost->discovery_threads >= disc_threads) | |
4021 | return; | |
4022 | ||
4023 | kref_get(&tgt->kref); | |
e4b26f3d | 4024 | evt = ibmvfc_get_event(&vhost->crq); |
072b91f9 BK |
4025 | vhost->discovery_threads++; |
4026 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); | |
4027 | evt->tgt = tgt; | |
4028 | prli = &evt->iu.prli; | |
4029 | memset(prli, 0, sizeof(*prli)); | |
ebc7c74b TD |
4030 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
4031 | prli->common.version = cpu_to_be32(2); | |
4032 | prli->target_wwpn = cpu_to_be64(tgt->wwpn); | |
4033 | } else { | |
4034 | prli->common.version = cpu_to_be32(1); | |
4035 | } | |
0aab6c3f TD |
4036 | prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); |
4037 | prli->common.length = cpu_to_be16(sizeof(*prli)); | |
4038 | prli->scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
4039 | |
4040 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; | |
0aab6c3f TD |
4041 | prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); |
4042 | prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); | |
bb5a5054 | 4043 | prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); |
072b91f9 | 4044 | |
a6104b1e TD |
4045 | if (cls3_error) |
4046 | prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); | |
4047 | ||
072b91f9 BK |
4048 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
4049 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
4050 | vhost->discovery_threads--; | |
4051 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4052 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4053 | } else | |
4054 | tgt_dbg(tgt, "Sent process login\n"); | |
4055 | } | |
4056 | ||
4057 | /** | |
4058 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login | |
4059 | * @evt: ibmvfc event struct | |
4060 | * | |
4061 | **/ | |
4062 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) | |
4063 | { | |
4064 | struct ibmvfc_target *tgt = evt->tgt; | |
4065 | struct ibmvfc_host *vhost = evt->vhost; | |
4066 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; | |
0aab6c3f | 4067 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 4068 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
4069 | |
4070 | vhost->discovery_threads--; | |
4071 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4072 | switch (status) { | |
4073 | case IBMVFC_MAD_SUCCESS: | |
4074 | tgt_dbg(tgt, "Port Login succeeded\n"); | |
4075 | if (tgt->ids.port_name && | |
4076 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { | |
4077 | vhost->reinit = 1; | |
4078 | tgt_dbg(tgt, "Port re-init required\n"); | |
4079 | break; | |
4080 | } | |
4081 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); | |
4082 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
4083 | tgt->ids.port_id = tgt->scsi_id; | |
072b91f9 BK |
4084 | memcpy(&tgt->service_parms, &rsp->service_parms, |
4085 | sizeof(tgt->service_parms)); | |
4086 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
4087 | sizeof(tgt->service_parms_change)); | |
4088 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
4089 | break; | |
4090 | case IBMVFC_MAD_DRIVER_FAILED: | |
4091 | break; | |
4092 | case IBMVFC_MAD_CRQ_ERROR: | |
4093 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
4094 | break; | |
4095 | case IBMVFC_MAD_FAILED: | |
4096 | default: | |
0aab6c3f | 4097 | if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 4098 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
10e79499 | 4099 | else |
ed830385 | 4100 | ibmvfc_del_tgt(tgt); |
7d0e4622 BK |
4101 | |
4102 | tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3e6f7de4 TD |
4103 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
4104 | be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), | |
4105 | ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), | |
4106 | ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); | |
072b91f9 | 4107 | break; |
f36cfe6a | 4108 | } |
072b91f9 BK |
4109 | |
4110 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4111 | ibmvfc_free_event(evt); | |
4112 | wake_up(&vhost->work_wait_q); | |
4113 | } | |
4114 | ||
4115 | /** | |
4116 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target | |
4117 | * @tgt: ibmvfc target struct | |
4118 | * | |
4119 | **/ | |
4120 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) | |
4121 | { | |
4122 | struct ibmvfc_port_login *plogi; | |
4123 | struct ibmvfc_host *vhost = tgt->vhost; | |
4124 | struct ibmvfc_event *evt; | |
4125 | ||
4126 | if (vhost->discovery_threads >= disc_threads) | |
4127 | return; | |
4128 | ||
4129 | kref_get(&tgt->kref); | |
017b2ae3 | 4130 | tgt->logo_rcvd = 0; |
e4b26f3d | 4131 | evt = ibmvfc_get_event(&vhost->crq); |
072b91f9 BK |
4132 | vhost->discovery_threads++; |
4133 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
4134 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); | |
4135 | evt->tgt = tgt; | |
4136 | plogi = &evt->iu.plogi; | |
4137 | memset(plogi, 0, sizeof(*plogi)); | |
ebc7c74b TD |
4138 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
4139 | plogi->common.version = cpu_to_be32(2); | |
4140 | plogi->target_wwpn = cpu_to_be64(tgt->wwpn); | |
4141 | } else { | |
4142 | plogi->common.version = cpu_to_be32(1); | |
4143 | } | |
0aab6c3f TD |
4144 | plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); |
4145 | plogi->common.length = cpu_to_be16(sizeof(*plogi)); | |
4146 | plogi->scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
4147 | |
4148 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
4149 | vhost->discovery_threads--; | |
4150 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4151 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4152 | } else | |
4153 | tgt_dbg(tgt, "Sent port login\n"); | |
4154 | } | |
4155 | ||
4156 | /** | |
4157 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD | |
4158 | * @evt: ibmvfc event struct | |
4159 | * | |
4160 | **/ | |
4161 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) | |
4162 | { | |
4163 | struct ibmvfc_target *tgt = evt->tgt; | |
4164 | struct ibmvfc_host *vhost = evt->vhost; | |
4165 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; | |
0aab6c3f | 4166 | u32 status = be16_to_cpu(rsp->common.status); |
072b91f9 BK |
4167 | |
4168 | vhost->discovery_threads--; | |
4169 | ibmvfc_free_event(evt); | |
4170 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4171 | ||
4172 | switch (status) { | |
4173 | case IBMVFC_MAD_SUCCESS: | |
4174 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); | |
4175 | break; | |
4176 | case IBMVFC_MAD_DRIVER_FAILED: | |
4177 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4178 | wake_up(&vhost->work_wait_q); | |
4179 | return; | |
4180 | case IBMVFC_MAD_FAILED: | |
4181 | default: | |
4182 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); | |
4183 | break; | |
f36cfe6a | 4184 | } |
072b91f9 | 4185 | |
ed830385 | 4186 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); |
072b91f9 BK |
4187 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
4188 | wake_up(&vhost->work_wait_q); | |
4189 | } | |
4190 | ||
4191 | /** | |
ed830385 | 4192 | * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout |
072b91f9 | 4193 | * @tgt: ibmvfc target struct |
dd9c7729 | 4194 | * @done: Routine to call when the event is responded to |
072b91f9 | 4195 | * |
ed830385 BK |
4196 | * Returns: |
4197 | * Allocated and initialized ibmvfc_event struct | |
072b91f9 | 4198 | **/ |
ed830385 BK |
4199 | static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, |
4200 | void (*done) (struct ibmvfc_event *)) | |
072b91f9 BK |
4201 | { |
4202 | struct ibmvfc_implicit_logout *mad; | |
4203 | struct ibmvfc_host *vhost = tgt->vhost; | |
4204 | struct ibmvfc_event *evt; | |
4205 | ||
072b91f9 | 4206 | kref_get(&tgt->kref); |
e4b26f3d | 4207 | evt = ibmvfc_get_event(&vhost->crq); |
ed830385 | 4208 | ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); |
072b91f9 BK |
4209 | evt->tgt = tgt; |
4210 | mad = &evt->iu.implicit_logout; | |
4211 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
4212 | mad->common.version = cpu_to_be32(1); |
4213 | mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); | |
4214 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
4215 | mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); | |
ed830385 BK |
4216 | return evt; |
4217 | } | |
4218 | ||
4219 | /** | |
4220 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target | |
4221 | * @tgt: ibmvfc target struct | |
4222 | * | |
4223 | **/ | |
4224 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) | |
4225 | { | |
4226 | struct ibmvfc_host *vhost = tgt->vhost; | |
4227 | struct ibmvfc_event *evt; | |
4228 | ||
4229 | if (vhost->discovery_threads >= disc_threads) | |
4230 | return; | |
4231 | ||
4232 | vhost->discovery_threads++; | |
4233 | evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, | |
4234 | ibmvfc_tgt_implicit_logout_done); | |
072b91f9 BK |
4235 | |
4236 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
4237 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
4238 | vhost->discovery_threads--; | |
4239 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4240 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4241 | } else | |
4242 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
4243 | } | |
4244 | ||
ed830385 BK |
4245 | /** |
4246 | * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD | |
4247 | * @evt: ibmvfc event struct | |
4248 | * | |
4249 | **/ | |
4250 | static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) | |
4251 | { | |
4252 | struct ibmvfc_target *tgt = evt->tgt; | |
4253 | struct ibmvfc_host *vhost = evt->vhost; | |
4254 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
4255 | u32 status = be16_to_cpu(mad->common.status); | |
4256 | ||
4257 | vhost->discovery_threads--; | |
4258 | ibmvfc_free_event(evt); | |
4b29cb61 BK |
4259 | |
4260 | /* | |
4261 | * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the | |
4262 | * driver in which case we need to free up all the targets. If we are | |
4263 | * not unloading, we will still go through a hard reset to get out of | |
4264 | * offline state, so there is no need to track the old targets in that | |
4265 | * case. | |
4266 | */ | |
4267 | if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) | |
4268 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
4269 | else | |
4270 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); | |
ed830385 BK |
4271 | |
4272 | tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); | |
4273 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4274 | wake_up(&vhost->work_wait_q); | |
4275 | } | |
4276 | ||
4277 | /** | |
4278 | * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target | |
4279 | * @tgt: ibmvfc target struct | |
4280 | * | |
4281 | **/ | |
4282 | static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) | |
4283 | { | |
4284 | struct ibmvfc_host *vhost = tgt->vhost; | |
4285 | struct ibmvfc_event *evt; | |
4286 | ||
66bb7fa8 BK |
4287 | if (!vhost->logged_in) { |
4288 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
4289 | return; | |
4290 | } | |
4291 | ||
ed830385 | 4292 | if (vhost->discovery_threads >= disc_threads) |
b893eb01 | 4293 | return; |
ed830385 BK |
4294 | |
4295 | vhost->discovery_threads++; | |
4296 | evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, | |
4297 | ibmvfc_tgt_implicit_logout_and_del_done); | |
4298 | ||
4299 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); | |
4300 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
4301 | vhost->discovery_threads--; | |
4302 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
4303 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4304 | } else | |
4305 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
4306 | } | |
4307 | ||
4b29cb61 BK |
4308 | /** |
4309 | * ibmvfc_tgt_move_login_done - Completion handler for Move Login | |
4310 | * @evt: ibmvfc event struct | |
4311 | * | |
4312 | **/ | |
4313 | static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) | |
4314 | { | |
4315 | struct ibmvfc_target *tgt = evt->tgt; | |
4316 | struct ibmvfc_host *vhost = evt->vhost; | |
4317 | struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; | |
4318 | u32 status = be16_to_cpu(rsp->common.status); | |
4319 | int level = IBMVFC_DEFAULT_LOG_LEVEL; | |
4320 | ||
4321 | vhost->discovery_threads--; | |
4322 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4323 | switch (status) { | |
4324 | case IBMVFC_MAD_SUCCESS: | |
d5b45dd5 | 4325 | tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); |
4b29cb61 BK |
4326 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
4327 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
d5b45dd5 | 4328 | tgt->scsi_id = tgt->new_scsi_id; |
4b29cb61 BK |
4329 | tgt->ids.port_id = tgt->scsi_id; |
4330 | memcpy(&tgt->service_parms, &rsp->service_parms, | |
4331 | sizeof(tgt->service_parms)); | |
4332 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
4333 | sizeof(tgt->service_parms_change)); | |
4334 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
4335 | break; | |
4336 | case IBMVFC_MAD_DRIVER_FAILED: | |
4337 | break; | |
4338 | case IBMVFC_MAD_CRQ_ERROR: | |
4339 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); | |
4340 | break; | |
4341 | case IBMVFC_MAD_FAILED: | |
4342 | default: | |
4343 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); | |
4344 | ||
4345 | tgt_log(tgt, level, | |
d5b45dd5 BK |
4346 | "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", |
4347 | tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), | |
4b29cb61 BK |
4348 | status); |
4349 | break; | |
4350 | } | |
4351 | ||
4352 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4353 | ibmvfc_free_event(evt); | |
4354 | wake_up(&vhost->work_wait_q); | |
4355 | } | |
4356 | ||
4357 | ||
4358 | /** | |
4359 | * ibmvfc_tgt_move_login - Initiate a move login for specified target | |
4360 | * @tgt: ibmvfc target struct | |
4361 | * | |
4362 | **/ | |
4363 | static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) | |
4364 | { | |
4365 | struct ibmvfc_host *vhost = tgt->vhost; | |
4366 | struct ibmvfc_move_login *move; | |
4367 | struct ibmvfc_event *evt; | |
4368 | ||
4369 | if (vhost->discovery_threads >= disc_threads) | |
4370 | return; | |
4371 | ||
4372 | kref_get(&tgt->kref); | |
e4b26f3d | 4373 | evt = ibmvfc_get_event(&vhost->crq); |
4b29cb61 BK |
4374 | vhost->discovery_threads++; |
4375 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
4376 | ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); | |
4377 | evt->tgt = tgt; | |
4378 | move = &evt->iu.move_login; | |
4379 | memset(move, 0, sizeof(*move)); | |
4380 | move->common.version = cpu_to_be32(1); | |
4381 | move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); | |
4382 | move->common.length = cpu_to_be16(sizeof(*move)); | |
4383 | ||
d5b45dd5 BK |
4384 | move->old_scsi_id = cpu_to_be64(tgt->scsi_id); |
4385 | move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); | |
4b29cb61 BK |
4386 | move->wwpn = cpu_to_be64(tgt->wwpn); |
4387 | move->node_name = cpu_to_be64(tgt->ids.node_name); | |
4388 | ||
4389 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
4390 | vhost->discovery_threads--; | |
4391 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
4392 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4393 | } else | |
d5b45dd5 | 4394 | tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); |
4b29cb61 BK |
4395 | } |
4396 | ||
989b8545 BK |
4397 | /** |
4398 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? | |
4399 | * @mad: ibmvfc passthru mad struct | |
4400 | * @tgt: ibmvfc target struct | |
4401 | * | |
4402 | * Returns: | |
4403 | * 1 if PLOGI needed / 0 if PLOGI not needed | |
4404 | **/ | |
4405 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, | |
4406 | struct ibmvfc_target *tgt) | |
4407 | { | |
09dd15e0 | 4408 | if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) |
989b8545 | 4409 | return 1; |
09dd15e0 | 4410 | if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) |
989b8545 | 4411 | return 1; |
0aab6c3f | 4412 | if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) |
989b8545 BK |
4413 | return 1; |
4414 | return 0; | |
4415 | } | |
4416 | ||
4417 | /** | |
4418 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC | |
4419 | * @evt: ibmvfc event struct | |
4420 | * | |
4421 | **/ | |
4422 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) | |
4423 | { | |
4424 | struct ibmvfc_target *tgt = evt->tgt; | |
4425 | struct ibmvfc_host *vhost = evt->vhost; | |
4426 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
0aab6c3f | 4427 | u32 status = be16_to_cpu(mad->common.status); |
989b8545 BK |
4428 | u8 fc_reason, fc_explain; |
4429 | ||
4430 | vhost->discovery_threads--; | |
4431 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
10501e1c | 4432 | del_timer(&tgt->timer); |
989b8545 BK |
4433 | |
4434 | switch (status) { | |
4435 | case IBMVFC_MAD_SUCCESS: | |
4436 | tgt_dbg(tgt, "ADISC succeeded\n"); | |
4437 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) | |
ed830385 | 4438 | ibmvfc_del_tgt(tgt); |
989b8545 BK |
4439 | break; |
4440 | case IBMVFC_MAD_DRIVER_FAILED: | |
4441 | break; | |
4442 | case IBMVFC_MAD_FAILED: | |
4443 | default: | |
ed830385 | 4444 | ibmvfc_del_tgt(tgt); |
0aab6c3f TD |
4445 | fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; |
4446 | fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; | |
989b8545 | 4447 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
0aab6c3f | 4448 | ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), |
3e6f7de4 | 4449 | be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), |
989b8545 BK |
4450 | ibmvfc_get_fc_type(fc_reason), fc_reason, |
4451 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); | |
4452 | break; | |
f36cfe6a | 4453 | } |
989b8545 BK |
4454 | |
4455 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4456 | ibmvfc_free_event(evt); | |
4457 | wake_up(&vhost->work_wait_q); | |
4458 | } | |
4459 | ||
4460 | /** | |
4461 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru | |
4462 | * @evt: ibmvfc event struct | |
4463 | * | |
4464 | **/ | |
4465 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) | |
4466 | { | |
4467 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; | |
4468 | ||
4469 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
4470 | mad->common.version = cpu_to_be32(1); |
4471 | mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); | |
4472 | mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); | |
4473 | mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
4474 | offsetof(struct ibmvfc_passthru_mad, iu)); | |
4475 | mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); | |
4476 | mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); | |
4477 | mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); | |
4478 | mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
989b8545 | 4479 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
0aab6c3f TD |
4480 | offsetof(struct ibmvfc_passthru_fc_iu, payload)); |
4481 | mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); | |
4482 | mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
989b8545 | 4483 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
0aab6c3f TD |
4484 | offsetof(struct ibmvfc_passthru_fc_iu, response)); |
4485 | mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); | |
989b8545 BK |
4486 | } |
4487 | ||
10501e1c BK |
4488 | /** |
4489 | * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC | |
4490 | * @evt: ibmvfc event struct | |
4491 | * | |
4492 | * Just cleanup this event struct. Everything else is handled by | |
4493 | * the ADISC completion handler. If the ADISC never actually comes | |
4494 | * back, we still have the timer running on the ADISC event struct | |
4495 | * which will fire and cause the CRQ to get reset. | |
4496 | * | |
4497 | **/ | |
4498 | static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) | |
4499 | { | |
4500 | struct ibmvfc_host *vhost = evt->vhost; | |
4501 | struct ibmvfc_target *tgt = evt->tgt; | |
4502 | ||
4503 | tgt_dbg(tgt, "ADISC cancel complete\n"); | |
4504 | vhost->abort_threads--; | |
4505 | ibmvfc_free_event(evt); | |
4506 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4507 | wake_up(&vhost->work_wait_q); | |
4508 | } | |
4509 | ||
4510 | /** | |
4511 | * ibmvfc_adisc_timeout - Handle an ADISC timeout | |
dd9c7729 | 4512 | * @t: ibmvfc target struct |
10501e1c BK |
4513 | * |
4514 | * If an ADISC times out, send a cancel. If the cancel times | |
4515 | * out, reset the CRQ. When the ADISC comes back as cancelled, | |
4516 | * log back into the target. | |
4517 | **/ | |
9a5d04fc | 4518 | static void ibmvfc_adisc_timeout(struct timer_list *t) |
10501e1c | 4519 | { |
9a5d04fc | 4520 | struct ibmvfc_target *tgt = from_timer(tgt, t, timer); |
10501e1c BK |
4521 | struct ibmvfc_host *vhost = tgt->vhost; |
4522 | struct ibmvfc_event *evt; | |
4523 | struct ibmvfc_tmf *tmf; | |
4524 | unsigned long flags; | |
4525 | int rc; | |
4526 | ||
4527 | tgt_dbg(tgt, "ADISC timeout\n"); | |
4528 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4529 | if (vhost->abort_threads >= disc_threads || | |
4530 | tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || | |
4531 | vhost->state != IBMVFC_INITIALIZING || | |
4532 | vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { | |
4533 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4534 | return; | |
4535 | } | |
4536 | ||
4537 | vhost->abort_threads++; | |
4538 | kref_get(&tgt->kref); | |
e4b26f3d | 4539 | evt = ibmvfc_get_event(&vhost->crq); |
10501e1c BK |
4540 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); |
4541 | ||
4542 | evt->tgt = tgt; | |
4543 | tmf = &evt->iu.tmf; | |
4544 | memset(tmf, 0, sizeof(*tmf)); | |
ebc7c74b TD |
4545 | if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { |
4546 | tmf->common.version = cpu_to_be32(2); | |
4547 | tmf->target_wwpn = cpu_to_be64(tgt->wwpn); | |
4548 | } else { | |
4549 | tmf->common.version = cpu_to_be32(1); | |
4550 | } | |
0aab6c3f TD |
4551 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); |
4552 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
4553 | tmf->scsi_id = cpu_to_be64(tgt->scsi_id); | |
4554 | tmf->cancel_key = cpu_to_be32(tgt->cancel_key); | |
10501e1c BK |
4555 | |
4556 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
4557 | ||
4558 | if (rc) { | |
4559 | tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); | |
4560 | vhost->abort_threads--; | |
4561 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4562 | __ibmvfc_reset_host(vhost); | |
4563 | } else | |
4564 | tgt_dbg(tgt, "Attempting to cancel ADISC\n"); | |
4565 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4566 | } | |
4567 | ||
989b8545 BK |
4568 | /** |
4569 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target | |
4570 | * @tgt: ibmvfc target struct | |
4571 | * | |
10501e1c BK |
4572 | * When sending an ADISC we end up with two timers running. The |
4573 | * first timer is the timer in the ibmvfc target struct. If this | |
4574 | * fires, we send a cancel to the target. The second timer is the | |
4575 | * timer on the ibmvfc event for the ADISC, which is longer. If that | |
4576 | * fires, it means the ADISC timed out and our attempt to cancel it | |
4577 | * also failed, so we need to reset the CRQ. | |
989b8545 BK |
4578 | **/ |
4579 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) | |
4580 | { | |
4581 | struct ibmvfc_passthru_mad *mad; | |
4582 | struct ibmvfc_host *vhost = tgt->vhost; | |
4583 | struct ibmvfc_event *evt; | |
4584 | ||
4585 | if (vhost->discovery_threads >= disc_threads) | |
4586 | return; | |
4587 | ||
4588 | kref_get(&tgt->kref); | |
e4b26f3d | 4589 | evt = ibmvfc_get_event(&vhost->crq); |
989b8545 BK |
4590 | vhost->discovery_threads++; |
4591 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); | |
4592 | evt->tgt = tgt; | |
4593 | ||
4594 | ibmvfc_init_passthru(evt); | |
4595 | mad = &evt->iu.passthru; | |
0aab6c3f TD |
4596 | mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); |
4597 | mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); | |
4598 | mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); | |
989b8545 | 4599 | |
0aab6c3f | 4600 | mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); |
989b8545 BK |
4601 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
4602 | sizeof(vhost->login_buf->resp.port_name)); | |
4603 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, | |
4604 | sizeof(vhost->login_buf->resp.node_name)); | |
0aab6c3f | 4605 | mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); |
989b8545 | 4606 | |
10501e1c BK |
4607 | if (timer_pending(&tgt->timer)) |
4608 | mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); | |
4609 | else { | |
10501e1c | 4610 | tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); |
10501e1c BK |
4611 | add_timer(&tgt->timer); |
4612 | } | |
4613 | ||
989b8545 | 4614 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
10501e1c | 4615 | if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { |
989b8545 | 4616 | vhost->discovery_threads--; |
10501e1c | 4617 | del_timer(&tgt->timer); |
989b8545 BK |
4618 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
4619 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4620 | } else | |
4621 | tgt_dbg(tgt, "Sent ADISC\n"); | |
4622 | } | |
4623 | ||
072b91f9 BK |
4624 | /** |
4625 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD | |
4626 | * @evt: ibmvfc event struct | |
4627 | * | |
4628 | **/ | |
4629 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) | |
4630 | { | |
4631 | struct ibmvfc_target *tgt = evt->tgt; | |
4632 | struct ibmvfc_host *vhost = evt->vhost; | |
4633 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; | |
0aab6c3f | 4634 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 4635 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
4636 | |
4637 | vhost->discovery_threads--; | |
4638 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4639 | switch (status) { | |
4640 | case IBMVFC_MAD_SUCCESS: | |
4641 | tgt_dbg(tgt, "Query Target succeeded\n"); | |
0aab6c3f | 4642 | if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) |
ed830385 | 4643 | ibmvfc_del_tgt(tgt); |
989b8545 BK |
4644 | else |
4645 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); | |
072b91f9 BK |
4646 | break; |
4647 | case IBMVFC_MAD_DRIVER_FAILED: | |
4648 | break; | |
4649 | case IBMVFC_MAD_CRQ_ERROR: | |
4650 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
4651 | break; | |
4652 | case IBMVFC_MAD_FAILED: | |
4653 | default: | |
0aab6c3f TD |
4654 | if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
4655 | be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && | |
4656 | be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) | |
ed830385 | 4657 | ibmvfc_del_tgt(tgt); |
0aab6c3f | 4658 | else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 4659 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
10e79499 | 4660 | else |
ed830385 | 4661 | ibmvfc_del_tgt(tgt); |
7d0e4622 BK |
4662 | |
4663 | tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
0aab6c3f | 4664 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3e6f7de4 TD |
4665 | be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), |
4666 | ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), | |
4667 | ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), | |
4668 | status); | |
072b91f9 | 4669 | break; |
f36cfe6a | 4670 | } |
072b91f9 BK |
4671 | |
4672 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4673 | ibmvfc_free_event(evt); | |
4674 | wake_up(&vhost->work_wait_q); | |
4675 | } | |
4676 | ||
4677 | /** | |
4678 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target | |
4679 | * @tgt: ibmvfc target struct | |
4680 | * | |
4681 | **/ | |
4682 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) | |
4683 | { | |
4684 | struct ibmvfc_query_tgt *query_tgt; | |
4685 | struct ibmvfc_host *vhost = tgt->vhost; | |
4686 | struct ibmvfc_event *evt; | |
4687 | ||
4688 | if (vhost->discovery_threads >= disc_threads) | |
4689 | return; | |
4690 | ||
4691 | kref_get(&tgt->kref); | |
e4b26f3d | 4692 | evt = ibmvfc_get_event(&vhost->crq); |
072b91f9 BK |
4693 | vhost->discovery_threads++; |
4694 | evt->tgt = tgt; | |
4695 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); | |
4696 | query_tgt = &evt->iu.query_tgt; | |
4697 | memset(query_tgt, 0, sizeof(*query_tgt)); | |
0aab6c3f TD |
4698 | query_tgt->common.version = cpu_to_be32(1); |
4699 | query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); | |
4700 | query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); | |
4701 | query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); | |
072b91f9 BK |
4702 | |
4703 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
4704 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
4705 | vhost->discovery_threads--; | |
4706 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
4707 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4708 | } else | |
4709 | tgt_dbg(tgt, "Sent Query Target\n"); | |
4710 | } | |
4711 | ||
4712 | /** | |
4713 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target | |
4714 | * @vhost: ibmvfc host struct | |
dd9c7729 | 4715 | * @target: Holds SCSI ID to allocate target forand the WWPN |
072b91f9 BK |
4716 | * |
4717 | * Returns: | |
4718 | * 0 on success / other on failure | |
4719 | **/ | |
4b29cb61 BK |
4720 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, |
4721 | struct ibmvfc_discover_targets_entry *target) | |
072b91f9 | 4722 | { |
4b29cb61 BK |
4723 | struct ibmvfc_target *stgt = NULL; |
4724 | struct ibmvfc_target *wtgt = NULL; | |
072b91f9 BK |
4725 | struct ibmvfc_target *tgt; |
4726 | unsigned long flags; | |
4b29cb61 BK |
4727 | u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; |
4728 | u64 wwpn = be64_to_cpu(target->wwpn); | |
072b91f9 | 4729 | |
4b29cb61 | 4730 | /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ |
072b91f9 | 4731 | spin_lock_irqsave(vhost->host->host_lock, flags); |
4b29cb61 BK |
4732 | list_for_each_entry(tgt, &vhost->targets, queue) { |
4733 | if (tgt->wwpn == wwpn) { | |
4734 | wtgt = tgt; | |
4735 | break; | |
4736 | } | |
4737 | } | |
4738 | ||
072b91f9 BK |
4739 | list_for_each_entry(tgt, &vhost->targets, queue) { |
4740 | if (tgt->scsi_id == scsi_id) { | |
4b29cb61 BK |
4741 | stgt = tgt; |
4742 | break; | |
4743 | } | |
4744 | } | |
4745 | ||
4746 | if (wtgt && !stgt) { | |
4747 | /* | |
4748 | * A WWPN target has moved and we still are tracking the old | |
4749 | * SCSI ID. The only way we should be able to get here is if | |
4750 | * we attempted to send an implicit logout for the old SCSI ID | |
4751 | * and it failed for some reason, such as there being I/O | |
4752 | * pending to the target. In this case, we will have already | |
4753 | * deleted the rport from the FC transport so we do a move | |
5114975e BK |
4754 | * login, which works even with I/O pending, however, if |
4755 | * there is still I/O pending, it will stay outstanding, so | |
4756 | * we only do this if fast fail is disabled for the rport, | |
4757 | * otherwise we let terminate_rport_io clean up the port | |
4758 | * before we login at the new location. | |
4b29cb61 BK |
4759 | */ |
4760 | if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { | |
5114975e BK |
4761 | if (wtgt->move_login) { |
4762 | /* | |
4763 | * Do a move login here. The old target is no longer | |
4764 | * known to the transport layer We don't use the | |
4765 | * normal ibmvfc_set_tgt_action to set this, as we | |
4766 | * don't normally want to allow this state change. | |
4767 | */ | |
4768 | wtgt->new_scsi_id = scsi_id; | |
4769 | wtgt->action = IBMVFC_TGT_ACTION_INIT; | |
2e51f78b | 4770 | wtgt->init_retries = 0; |
5114975e BK |
4771 | ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); |
4772 | } | |
072b91f9 | 4773 | goto unlock_out; |
4b29cb61 BK |
4774 | } else { |
4775 | tgt_err(wtgt, "Unexpected target state: %d, %p\n", | |
4776 | wtgt->action, wtgt->rport); | |
072b91f9 | 4777 | } |
4b29cb61 BK |
4778 | } else if (stgt) { |
4779 | if (tgt->need_login) | |
4780 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
4781 | goto unlock_out; | |
072b91f9 BK |
4782 | } |
4783 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4784 | ||
7270b9bd | 4785 | tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); |
0883e3b3 | 4786 | memset(tgt, 0, sizeof(*tgt)); |
072b91f9 | 4787 | tgt->scsi_id = scsi_id; |
4b29cb61 | 4788 | tgt->wwpn = wwpn; |
072b91f9 BK |
4789 | tgt->vhost = vhost; |
4790 | tgt->need_login = 1; | |
9a5d04fc | 4791 | timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); |
072b91f9 BK |
4792 | kref_init(&tgt->kref); |
4793 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
4794 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2584e5ae | 4795 | tgt->cancel_key = vhost->task_set++; |
072b91f9 BK |
4796 | list_add_tail(&tgt->queue, &vhost->targets); |
4797 | ||
4798 | unlock_out: | |
4799 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4800 | return 0; | |
4801 | } | |
4802 | ||
4803 | /** | |
4804 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets | |
4805 | * @vhost: ibmvfc host struct | |
4806 | * | |
4807 | * Returns: | |
4808 | * 0 on success / other on failure | |
4809 | **/ | |
4810 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) | |
4811 | { | |
4812 | int i, rc; | |
4813 | ||
4814 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) | |
4b29cb61 | 4815 | rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); |
072b91f9 BK |
4816 | |
4817 | return rc; | |
4818 | } | |
4819 | ||
4820 | /** | |
4821 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD | |
4822 | * @evt: ibmvfc event struct | |
4823 | * | |
4824 | **/ | |
4825 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) | |
4826 | { | |
4827 | struct ibmvfc_host *vhost = evt->vhost; | |
4828 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; | |
0aab6c3f | 4829 | u32 mad_status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 4830 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
4831 | |
4832 | switch (mad_status) { | |
4833 | case IBMVFC_MAD_SUCCESS: | |
4834 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); | |
0aab6c3f | 4835 | vhost->num_targets = be32_to_cpu(rsp->num_written); |
072b91f9 BK |
4836 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
4837 | break; | |
4838 | case IBMVFC_MAD_FAILED: | |
7d0e4622 BK |
4839 | level += ibmvfc_retry_host_init(vhost); |
4840 | ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", | |
0aab6c3f | 4841 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3e6f7de4 | 4842 | be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); |
072b91f9 BK |
4843 | break; |
4844 | case IBMVFC_MAD_DRIVER_FAILED: | |
4845 | break; | |
4846 | default: | |
4847 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); | |
4848 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4849 | break; | |
4850 | } | |
4851 | ||
4852 | ibmvfc_free_event(evt); | |
4853 | wake_up(&vhost->work_wait_q); | |
4854 | } | |
4855 | ||
4856 | /** | |
4857 | * ibmvfc_discover_targets - Send Discover Targets MAD | |
4858 | * @vhost: ibmvfc host struct | |
4859 | * | |
4860 | **/ | |
4861 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) | |
4862 | { | |
4863 | struct ibmvfc_discover_targets *mad; | |
e4b26f3d | 4864 | struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); |
072b91f9 BK |
4865 | |
4866 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); | |
4867 | mad = &evt->iu.discover_targets; | |
4868 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
4869 | mad->common.version = cpu_to_be32(1); |
4870 | mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); | |
4871 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
4872 | mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); | |
4873 | mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); | |
4874 | mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); | |
4b29cb61 | 4875 | mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); |
072b91f9 BK |
4876 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
4877 | ||
4878 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
4879 | ibmvfc_dbg(vhost, "Sent discover targets\n"); | |
4880 | else | |
4881 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4882 | } | |
4883 | ||
e95eef3f TD |
4884 | static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) |
4885 | { | |
4886 | struct ibmvfc_host *vhost = evt->vhost; | |
b88a5d9b TD |
4887 | struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; |
4888 | struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; | |
e95eef3f TD |
4889 | u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); |
4890 | int level = IBMVFC_DEFAULT_LOG_LEVEL; | |
b88a5d9b | 4891 | int flags, active_queues, i; |
e95eef3f TD |
4892 | |
4893 | ibmvfc_free_event(evt); | |
4894 | ||
4895 | switch (mad_status) { | |
4896 | case IBMVFC_MAD_SUCCESS: | |
ff79acc4 | 4897 | ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); |
b88a5d9b | 4898 | flags = be32_to_cpu(setup->flags); |
e95eef3f | 4899 | vhost->do_enquiry = 0; |
b88a5d9b TD |
4900 | active_queues = be32_to_cpu(setup->num_scsi_subq_channels); |
4901 | scrqs->active_queues = active_queues; | |
4902 | ||
4903 | if (flags & IBMVFC_CHANNELS_CANCELED) { | |
4904 | ibmvfc_dbg(vhost, "Channels Canceled\n"); | |
4905 | vhost->using_channels = 0; | |
4906 | } else { | |
4907 | if (active_queues) | |
4908 | vhost->using_channels = 1; | |
4909 | for (i = 0; i < active_queues; i++) | |
4910 | scrqs->scrqs[i].vios_cookie = | |
4911 | be64_to_cpu(setup->channel_handles[i]); | |
4912 | ||
4913 | ibmvfc_dbg(vhost, "Using %u channels\n", | |
4914 | vhost->scsi_scrqs.active_queues); | |
4915 | } | |
e95eef3f TD |
4916 | break; |
4917 | case IBMVFC_MAD_FAILED: | |
4918 | level += ibmvfc_retry_host_init(vhost); | |
4919 | ibmvfc_log(vhost, level, "Channel Setup failed\n"); | |
4920 | fallthrough; | |
4921 | case IBMVFC_MAD_DRIVER_FAILED: | |
4922 | return; | |
4923 | default: | |
4924 | dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", | |
4925 | mad_status); | |
4926 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4927 | return; | |
4928 | } | |
4929 | ||
4930 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
4931 | wake_up(&vhost->work_wait_q); | |
4932 | } | |
4933 | ||
4934 | static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) | |
4935 | { | |
4936 | struct ibmvfc_channel_setup_mad *mad; | |
4937 | struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; | |
4938 | struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); | |
b88a5d9b TD |
4939 | struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; |
4940 | unsigned int num_channels = | |
4941 | min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels); | |
4942 | int i; | |
e95eef3f TD |
4943 | |
4944 | memset(setup_buf, 0, sizeof(*setup_buf)); | |
b88a5d9b TD |
4945 | if (num_channels == 0) |
4946 | setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); | |
4947 | else { | |
4948 | setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); | |
4949 | for (i = 0; i < num_channels; i++) | |
4950 | setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); | |
4951 | } | |
e95eef3f TD |
4952 | |
4953 | ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); | |
4954 | mad = &evt->iu.channel_setup; | |
4955 | memset(mad, 0, sizeof(*mad)); | |
4956 | mad->common.version = cpu_to_be32(1); | |
4957 | mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); | |
4958 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
4959 | mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); | |
4960 | mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); | |
4961 | ||
4962 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); | |
4963 | ||
4964 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
4965 | ibmvfc_dbg(vhost, "Sent channel setup\n"); | |
4966 | else | |
4967 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
4968 | } | |
4969 | ||
4970 | static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) | |
4971 | { | |
4972 | struct ibmvfc_host *vhost = evt->vhost; | |
4973 | struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; | |
4974 | u32 mad_status = be16_to_cpu(rsp->common.status); | |
4975 | int level = IBMVFC_DEFAULT_LOG_LEVEL; | |
4976 | ||
4977 | switch (mad_status) { | |
4978 | case IBMVFC_MAD_SUCCESS: | |
4979 | ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); | |
4980 | vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); | |
4981 | ibmvfc_free_event(evt); | |
4982 | break; | |
4983 | case IBMVFC_MAD_FAILED: | |
4984 | level += ibmvfc_retry_host_init(vhost); | |
4985 | ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); | |
4986 | fallthrough; | |
4987 | case IBMVFC_MAD_DRIVER_FAILED: | |
4988 | ibmvfc_free_event(evt); | |
4989 | return; | |
4990 | default: | |
4991 | dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", | |
4992 | mad_status); | |
4993 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4994 | ibmvfc_free_event(evt); | |
4995 | return; | |
4996 | } | |
4997 | ||
4998 | ibmvfc_channel_setup(vhost); | |
4999 | } | |
5000 | ||
5001 | static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) | |
5002 | { | |
5003 | struct ibmvfc_channel_enquiry *mad; | |
5004 | struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); | |
5005 | ||
5006 | ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); | |
5007 | mad = &evt->iu.channel_enquiry; | |
5008 | memset(mad, 0, sizeof(*mad)); | |
5009 | mad->common.version = cpu_to_be32(1); | |
5010 | mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); | |
5011 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
5012 | ||
032d1900 | 5013 | if (mig_channels_only) |
e95eef3f | 5014 | mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); |
032d1900 | 5015 | if (mig_no_less_channels) |
e95eef3f TD |
5016 | mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); |
5017 | ||
5018 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); | |
5019 | ||
5020 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
5021 | ibmvfc_dbg(vhost, "Send channel enquiry\n"); | |
5022 | else | |
5023 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5024 | } | |
5025 | ||
072b91f9 BK |
5026 | /** |
5027 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login | |
5028 | * @evt: ibmvfc event struct | |
5029 | * | |
5030 | **/ | |
5031 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) | |
5032 | { | |
5033 | struct ibmvfc_host *vhost = evt->vhost; | |
0aab6c3f | 5034 | u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); |
072b91f9 BK |
5035 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
5036 | unsigned int npiv_max_sectors; | |
7d0e4622 | 5037 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
5038 | |
5039 | switch (mad_status) { | |
5040 | case IBMVFC_MAD_SUCCESS: | |
5041 | ibmvfc_free_event(evt); | |
5042 | break; | |
5043 | case IBMVFC_MAD_FAILED: | |
0aab6c3f | 5044 | if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 5045 | level += ibmvfc_retry_host_init(vhost); |
072b91f9 BK |
5046 | else |
5047 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
7d0e4622 | 5048 | ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", |
0aab6c3f | 5049 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3e6f7de4 | 5050 | be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); |
072b91f9 BK |
5051 | ibmvfc_free_event(evt); |
5052 | return; | |
5053 | case IBMVFC_MAD_CRQ_ERROR: | |
5054 | ibmvfc_retry_host_init(vhost); | |
df561f66 | 5055 | fallthrough; |
072b91f9 BK |
5056 | case IBMVFC_MAD_DRIVER_FAILED: |
5057 | ibmvfc_free_event(evt); | |
5058 | return; | |
5059 | default: | |
5060 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); | |
5061 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5062 | ibmvfc_free_event(evt); | |
5063 | return; | |
5064 | } | |
5065 | ||
5066 | vhost->client_migrated = 0; | |
5067 | ||
0aab6c3f | 5068 | if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { |
072b91f9 BK |
5069 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
5070 | rsp->flags); | |
5071 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5072 | wake_up(&vhost->work_wait_q); | |
5073 | return; | |
5074 | } | |
5075 | ||
0aab6c3f | 5076 | if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { |
072b91f9 BK |
5077 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
5078 | rsp->max_cmds); | |
5079 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5080 | wake_up(&vhost->work_wait_q); | |
5081 | return; | |
5082 | } | |
5083 | ||
79111d08 | 5084 | vhost->logged_in = 1; |
0aab6c3f | 5085 | npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); |
072b91f9 BK |
5086 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
5087 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, | |
5088 | rsp->drc_name, npiv_max_sectors); | |
5089 | ||
0aab6c3f TD |
5090 | fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); |
5091 | fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); | |
5092 | fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); | |
5093 | fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); | |
072b91f9 BK |
5094 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
5095 | fc_host_supported_classes(vhost->host) = 0; | |
0aab6c3f | 5096 | if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) |
072b91f9 | 5097 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
0aab6c3f | 5098 | if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) |
072b91f9 | 5099 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
0aab6c3f | 5100 | if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) |
072b91f9 BK |
5101 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
5102 | fc_host_maxframe_size(vhost->host) = | |
0aab6c3f | 5103 | be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; |
072b91f9 | 5104 | |
0aab6c3f | 5105 | vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; |
072b91f9 | 5106 | vhost->host->max_sectors = npiv_max_sectors; |
e95eef3f TD |
5107 | |
5108 | if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { | |
5109 | ibmvfc_channel_enquiry(vhost); | |
5110 | } else { | |
5111 | vhost->do_enquiry = 0; | |
5112 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
5113 | wake_up(&vhost->work_wait_q); | |
5114 | } | |
072b91f9 BK |
5115 | } |
5116 | ||
5117 | /** | |
5118 | * ibmvfc_npiv_login - Sends NPIV login | |
5119 | * @vhost: ibmvfc host struct | |
5120 | * | |
5121 | **/ | |
5122 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) | |
5123 | { | |
5124 | struct ibmvfc_npiv_login_mad *mad; | |
e4b26f3d | 5125 | struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); |
072b91f9 BK |
5126 | |
5127 | ibmvfc_gather_partition_info(vhost); | |
5128 | ibmvfc_set_login_info(vhost); | |
5129 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); | |
5130 | ||
5131 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); | |
5132 | mad = &evt->iu.npiv_login; | |
5133 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); | |
0aab6c3f TD |
5134 | mad->common.version = cpu_to_be32(1); |
5135 | mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); | |
5136 | mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); | |
5137 | mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); | |
5138 | mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); | |
072b91f9 | 5139 | |
072b91f9 BK |
5140 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
5141 | ||
5142 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
5143 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); | |
5144 | else | |
5145 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4e071619 | 5146 | } |
072b91f9 | 5147 | |
79111d08 BK |
5148 | /** |
5149 | * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout | |
dd9c7729 | 5150 | * @evt: ibmvfc event struct |
79111d08 BK |
5151 | * |
5152 | **/ | |
5153 | static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) | |
5154 | { | |
5155 | struct ibmvfc_host *vhost = evt->vhost; | |
0aab6c3f | 5156 | u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); |
79111d08 BK |
5157 | |
5158 | ibmvfc_free_event(evt); | |
5159 | ||
5160 | switch (mad_status) { | |
5161 | case IBMVFC_MAD_SUCCESS: | |
e4b26f3d | 5162 | if (list_empty(&vhost->crq.sent) && |
79111d08 | 5163 | vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { |
861890c6 | 5164 | ibmvfc_init_host(vhost); |
79111d08 BK |
5165 | return; |
5166 | } | |
5167 | break; | |
5168 | case IBMVFC_MAD_FAILED: | |
5169 | case IBMVFC_MAD_NOT_SUPPORTED: | |
5170 | case IBMVFC_MAD_CRQ_ERROR: | |
5171 | case IBMVFC_MAD_DRIVER_FAILED: | |
5172 | default: | |
5173 | ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); | |
5174 | break; | |
5175 | } | |
5176 | ||
5177 | ibmvfc_hard_reset_host(vhost); | |
5178 | } | |
5179 | ||
5180 | /** | |
5181 | * ibmvfc_npiv_logout - Issue an NPIV Logout | |
5182 | * @vhost: ibmvfc host struct | |
5183 | * | |
5184 | **/ | |
5185 | static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) | |
5186 | { | |
5187 | struct ibmvfc_npiv_logout_mad *mad; | |
5188 | struct ibmvfc_event *evt; | |
5189 | ||
e4b26f3d | 5190 | evt = ibmvfc_get_event(&vhost->crq); |
79111d08 BK |
5191 | ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); |
5192 | ||
5193 | mad = &evt->iu.npiv_logout; | |
5194 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
5195 | mad->common.version = cpu_to_be32(1); |
5196 | mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); | |
5197 | mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); | |
79111d08 BK |
5198 | |
5199 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); | |
5200 | ||
5201 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
5202 | ibmvfc_dbg(vhost, "Sent NPIV logout\n"); | |
5203 | else | |
5204 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5205 | } | |
5206 | ||
072b91f9 BK |
5207 | /** |
5208 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? | |
5209 | * @vhost: ibmvfc host struct | |
5210 | * | |
5211 | * Returns: | |
5212 | * 1 if work to do / 0 if not | |
5213 | **/ | |
5214 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) | |
5215 | { | |
5216 | struct ibmvfc_target *tgt; | |
5217 | ||
5218 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
5219 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || | |
5220 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
5221 | return 1; | |
5222 | } | |
5223 | ||
5224 | return 0; | |
5225 | } | |
5226 | ||
ed830385 BK |
5227 | /** |
5228 | * ibmvfc_dev_logo_to_do - Is there target logout work to do? | |
5229 | * @vhost: ibmvfc host struct | |
5230 | * | |
5231 | * Returns: | |
5232 | * 1 if work to do / 0 if not | |
5233 | **/ | |
5234 | static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) | |
5235 | { | |
5236 | struct ibmvfc_target *tgt; | |
5237 | ||
5238 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
5239 | if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || | |
5240 | tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) | |
5241 | return 1; | |
5242 | } | |
5243 | return 0; | |
5244 | } | |
5245 | ||
072b91f9 BK |
5246 | /** |
5247 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) | |
5248 | * @vhost: ibmvfc host struct | |
5249 | * | |
5250 | * Returns: | |
5251 | * 1 if work to do / 0 if not | |
5252 | **/ | |
5253 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
5254 | { | |
5255 | struct ibmvfc_target *tgt; | |
5256 | ||
5257 | if (kthread_should_stop()) | |
5258 | return 1; | |
5259 | switch (vhost->action) { | |
5260 | case IBMVFC_HOST_ACTION_NONE: | |
5261 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
79111d08 | 5262 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
072b91f9 BK |
5263 | return 0; |
5264 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
5265 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
5266 | if (vhost->discovery_threads == disc_threads) | |
5267 | return 0; | |
5268 | list_for_each_entry(tgt, &vhost->targets, queue) | |
5269 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) | |
5270 | return 1; | |
5271 | list_for_each_entry(tgt, &vhost->targets, queue) | |
5272 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
5273 | return 0; | |
5274 | return 1; | |
ed830385 BK |
5275 | case IBMVFC_HOST_ACTION_TGT_DEL: |
5276 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: | |
5277 | if (vhost->discovery_threads == disc_threads) | |
5278 | return 0; | |
5279 | list_for_each_entry(tgt, &vhost->targets, queue) | |
5280 | if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) | |
5281 | return 1; | |
5282 | list_for_each_entry(tgt, &vhost->targets, queue) | |
5283 | if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) | |
5284 | return 0; | |
5285 | return 1; | |
79111d08 | 5286 | case IBMVFC_HOST_ACTION_LOGO: |
072b91f9 BK |
5287 | case IBMVFC_HOST_ACTION_INIT: |
5288 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
072b91f9 | 5289 | case IBMVFC_HOST_ACTION_QUERY: |
73ee5d86 BK |
5290 | case IBMVFC_HOST_ACTION_RESET: |
5291 | case IBMVFC_HOST_ACTION_REENABLE: | |
072b91f9 BK |
5292 | default: |
5293 | break; | |
f36cfe6a | 5294 | } |
072b91f9 BK |
5295 | |
5296 | return 1; | |
5297 | } | |
5298 | ||
5299 | /** | |
5300 | * ibmvfc_work_to_do - Is there task level work to do? | |
5301 | * @vhost: ibmvfc host struct | |
5302 | * | |
5303 | * Returns: | |
5304 | * 1 if work to do / 0 if not | |
5305 | **/ | |
5306 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
5307 | { | |
5308 | unsigned long flags; | |
5309 | int rc; | |
5310 | ||
5311 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
5312 | rc = __ibmvfc_work_to_do(vhost); | |
5313 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5314 | return rc; | |
5315 | } | |
5316 | ||
5317 | /** | |
5318 | * ibmvfc_log_ae - Log async events if necessary | |
5319 | * @vhost: ibmvfc host struct | |
5320 | * @events: events to log | |
5321 | * | |
5322 | **/ | |
5323 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) | |
5324 | { | |
5325 | if (events & IBMVFC_AE_RSCN) | |
5326 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); | |
5327 | if ((events & IBMVFC_AE_LINKDOWN) && | |
5328 | vhost->state >= IBMVFC_HALTED) | |
5329 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); | |
5330 | if ((events & IBMVFC_AE_LINKUP) && | |
5331 | vhost->state == IBMVFC_INITIALIZING) | |
5332 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); | |
5333 | } | |
5334 | ||
5335 | /** | |
5336 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port | |
5337 | * @tgt: ibmvfc target struct | |
5338 | * | |
5339 | **/ | |
5340 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) | |
5341 | { | |
5342 | struct ibmvfc_host *vhost = tgt->vhost; | |
43c8da90 | 5343 | struct fc_rport *rport; |
072b91f9 BK |
5344 | unsigned long flags; |
5345 | ||
43c8da90 BK |
5346 | tgt_dbg(tgt, "Adding rport\n"); |
5347 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); | |
5348 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
5349 | ||
5350 | if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
5351 | tgt_dbg(tgt, "Deleting rport\n"); | |
5352 | list_del(&tgt->queue); | |
d5da3040 | 5353 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); |
0883e3b3 | 5354 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
43c8da90 BK |
5355 | fc_remote_port_delete(rport); |
5356 | del_timer_sync(&tgt->timer); | |
5357 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
0883e3b3 | 5358 | return; |
4b29cb61 BK |
5359 | } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { |
5360 | tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); | |
5361 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); | |
5362 | tgt->rport = NULL; | |
2e51f78b | 5363 | tgt->init_retries = 0; |
4b29cb61 BK |
5364 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
5365 | fc_remote_port_delete(rport); | |
5366 | return; | |
d5da3040 BK |
5367 | } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { |
5368 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5369 | return; | |
0883e3b3 BK |
5370 | } |
5371 | ||
072b91f9 BK |
5372 | if (rport) { |
5373 | tgt_dbg(tgt, "rport add succeeded\n"); | |
43c8da90 | 5374 | tgt->rport = rport; |
0aab6c3f | 5375 | rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; |
072b91f9 | 5376 | rport->supported_classes = 0; |
52d7e861 | 5377 | tgt->target_id = rport->scsi_target_id; |
0aab6c3f | 5378 | if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) |
072b91f9 | 5379 | rport->supported_classes |= FC_COS_CLASS1; |
0aab6c3f | 5380 | if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) |
072b91f9 | 5381 | rport->supported_classes |= FC_COS_CLASS2; |
0aab6c3f | 5382 | if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) |
072b91f9 | 5383 | rport->supported_classes |= FC_COS_CLASS3; |
d31429e1 | 5384 | if (rport->rqst_q) |
8a78362c | 5385 | blk_queue_max_segments(rport->rqst_q, 1); |
072b91f9 BK |
5386 | } else |
5387 | tgt_dbg(tgt, "rport add failed\n"); | |
5388 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5389 | } | |
5390 | ||
5391 | /** | |
5392 | * ibmvfc_do_work - Do task level work | |
5393 | * @vhost: ibmvfc host struct | |
5394 | * | |
5395 | **/ | |
5396 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) | |
5397 | { | |
5398 | struct ibmvfc_target *tgt; | |
5399 | unsigned long flags; | |
5400 | struct fc_rport *rport; | |
57e80e0b | 5401 | LIST_HEAD(purge); |
73ee5d86 | 5402 | int rc; |
072b91f9 BK |
5403 | |
5404 | ibmvfc_log_ae(vhost, vhost->events_to_log); | |
5405 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
5406 | vhost->events_to_log = 0; | |
5407 | switch (vhost->action) { | |
5408 | case IBMVFC_HOST_ACTION_NONE: | |
79111d08 | 5409 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
072b91f9 BK |
5410 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
5411 | break; | |
73ee5d86 | 5412 | case IBMVFC_HOST_ACTION_RESET: |
57e80e0b | 5413 | list_splice_init(&vhost->purge, &purge); |
73ee5d86 | 5414 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
1f4a4a19 | 5415 | ibmvfc_complete_purge(&purge); |
73ee5d86 | 5416 | rc = ibmvfc_reset_crq(vhost); |
15cfef86 | 5417 | |
73ee5d86 | 5418 | spin_lock_irqsave(vhost->host->host_lock, flags); |
15cfef86 | 5419 | if (!rc || rc == H_CLOSED) |
d24099df | 5420 | vio_enable_interrupts(to_vio_dev(vhost->dev)); |
15cfef86 BK |
5421 | if (vhost->action == IBMVFC_HOST_ACTION_RESET) { |
5422 | /* | |
5423 | * The only action we could have changed to would have | |
5424 | * been reenable, in which case, we skip the rest of | |
5425 | * this path and wait until we've done the re-enable | |
5426 | * before sending the crq init. | |
5427 | */ | |
5428 | vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; | |
5429 | ||
5430 | if (rc || (rc = ibmvfc_send_crq_init(vhost)) || | |
5431 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { | |
5432 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5433 | dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); | |
5434 | } | |
73ee5d86 BK |
5435 | } |
5436 | break; | |
5437 | case IBMVFC_HOST_ACTION_REENABLE: | |
57e80e0b | 5438 | list_splice_init(&vhost->purge, &purge); |
73ee5d86 | 5439 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
1f4a4a19 | 5440 | ibmvfc_complete_purge(&purge); |
73ee5d86 | 5441 | rc = ibmvfc_reenable_crq_queue(vhost); |
15cfef86 | 5442 | |
73ee5d86 | 5443 | spin_lock_irqsave(vhost->host->host_lock, flags); |
15cfef86 BK |
5444 | if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { |
5445 | /* | |
5446 | * The only action we could have changed to would have | |
5447 | * been reset, in which case, we skip the rest of this | |
5448 | * path and wait until we've done the reset before | |
5449 | * sending the crq init. | |
5450 | */ | |
5451 | vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; | |
5452 | if (rc || (rc = ibmvfc_send_crq_init(vhost))) { | |
5453 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
5454 | dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); | |
5455 | } | |
73ee5d86 BK |
5456 | } |
5457 | break; | |
79111d08 BK |
5458 | case IBMVFC_HOST_ACTION_LOGO: |
5459 | vhost->job_step(vhost); | |
5460 | break; | |
072b91f9 BK |
5461 | case IBMVFC_HOST_ACTION_INIT: |
5462 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); | |
1c41fa82 BK |
5463 | if (vhost->delay_init) { |
5464 | vhost->delay_init = 0; | |
5465 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
d2131b33 | 5466 | ssleep(15); |
1c41fa82 BK |
5467 | return; |
5468 | } else | |
5469 | vhost->job_step(vhost); | |
072b91f9 BK |
5470 | break; |
5471 | case IBMVFC_HOST_ACTION_QUERY: | |
5472 | list_for_each_entry(tgt, &vhost->targets, queue) | |
5473 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); | |
5474 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); | |
5475 | break; | |
5476 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
5477 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
5478 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
5479 | tgt->job_step(tgt); | |
5480 | break; | |
5481 | } | |
5482 | } | |
5483 | ||
5484 | if (!ibmvfc_dev_init_to_do(vhost)) | |
5485 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
5486 | break; | |
5487 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
10e79499 | 5488 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
ed830385 BK |
5489 | list_for_each_entry(tgt, &vhost->targets, queue) { |
5490 | if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { | |
5491 | tgt->job_step(tgt); | |
5492 | break; | |
5493 | } | |
5494 | } | |
5495 | ||
5496 | if (ibmvfc_dev_logo_to_do(vhost)) { | |
5497 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5498 | return; | |
5499 | } | |
5500 | ||
072b91f9 BK |
5501 | list_for_each_entry(tgt, &vhost->targets, queue) { |
5502 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
5503 | tgt_dbg(tgt, "Deleting rport\n"); | |
5504 | rport = tgt->rport; | |
5505 | tgt->rport = NULL; | |
5506 | list_del(&tgt->queue); | |
d5da3040 | 5507 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); |
072b91f9 BK |
5508 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
5509 | if (rport) | |
5510 | fc_remote_port_delete(rport); | |
10501e1c | 5511 | del_timer_sync(&tgt->timer); |
072b91f9 BK |
5512 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
5513 | return; | |
4b29cb61 BK |
5514 | } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { |
5515 | tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); | |
5516 | rport = tgt->rport; | |
5517 | tgt->rport = NULL; | |
2e51f78b | 5518 | tgt->init_retries = 0; |
4b29cb61 | 5519 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); |
5114975e BK |
5520 | |
5521 | /* | |
5522 | * If fast fail is enabled, we wait for it to fire and then clean up | |
5523 | * the old port, since we expect the fast fail timer to clean up the | |
5524 | * outstanding I/O faster than waiting for normal command timeouts. | |
5525 | * However, if fast fail is disabled, any I/O outstanding to the | |
5526 | * rport LUNs will stay outstanding indefinitely, since the EH handlers | |
5527 | * won't get invoked for I/O's timing out. If this is a NPIV failover | |
5528 | * scenario, the better alternative is to use the move login. | |
5529 | */ | |
5530 | if (rport && rport->fast_io_fail_tmo == -1) | |
5531 | tgt->move_login = 1; | |
4b29cb61 BK |
5532 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
5533 | if (rport) | |
5534 | fc_remote_port_delete(rport); | |
5535 | return; | |
072b91f9 BK |
5536 | } |
5537 | } | |
5538 | ||
5539 | if (vhost->state == IBMVFC_INITIALIZING) { | |
10e79499 | 5540 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
43c8da90 BK |
5541 | if (vhost->reinit) { |
5542 | vhost->reinit = 0; | |
5543 | scsi_block_requests(vhost->host); | |
5544 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
5545 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5546 | } else { | |
5547 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); | |
5548 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
5549 | wake_up(&vhost->init_wait_q); | |
5550 | schedule_work(&vhost->rport_add_work_q); | |
5551 | vhost->init_retries = 0; | |
5552 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5553 | scsi_unblock_requests(vhost->host); | |
5554 | } | |
5555 | ||
10e79499 BK |
5556 | return; |
5557 | } else { | |
5558 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
5559 | vhost->job_step = ibmvfc_discover_targets; | |
5560 | } | |
072b91f9 BK |
5561 | } else { |
5562 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
5563 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5564 | scsi_unblock_requests(vhost->host); | |
5565 | wake_up(&vhost->init_wait_q); | |
5566 | return; | |
5567 | } | |
5568 | break; | |
5569 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
5570 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); | |
5571 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5572 | ibmvfc_alloc_targets(vhost); | |
5573 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
5574 | break; | |
5575 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
5576 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
5577 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
5578 | tgt->job_step(tgt); | |
5579 | break; | |
5580 | } | |
5581 | } | |
5582 | ||
10e79499 BK |
5583 | if (!ibmvfc_dev_init_to_do(vhost)) |
5584 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); | |
072b91f9 | 5585 | break; |
072b91f9 BK |
5586 | default: |
5587 | break; | |
f36cfe6a | 5588 | } |
072b91f9 BK |
5589 | |
5590 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
5591 | } | |
5592 | ||
5593 | /** | |
5594 | * ibmvfc_work - Do task level work | |
5595 | * @data: ibmvfc host struct | |
5596 | * | |
5597 | * Returns: | |
5598 | * zero | |
5599 | **/ | |
5600 | static int ibmvfc_work(void *data) | |
5601 | { | |
5602 | struct ibmvfc_host *vhost = data; | |
5603 | int rc; | |
5604 | ||
8698a745 | 5605 | set_user_nice(current, MIN_NICE); |
072b91f9 BK |
5606 | |
5607 | while (1) { | |
5608 | rc = wait_event_interruptible(vhost->work_wait_q, | |
5609 | ibmvfc_work_to_do(vhost)); | |
5610 | ||
5611 | BUG_ON(rc); | |
5612 | ||
5613 | if (kthread_should_stop()) | |
5614 | break; | |
5615 | ||
5616 | ibmvfc_do_work(vhost); | |
5617 | } | |
5618 | ||
5619 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); | |
5620 | return 0; | |
5621 | } | |
5622 | ||
f8968665 TD |
5623 | /** |
5624 | * ibmvfc_alloc_queue - Allocate queue | |
5625 | * @vhost: ibmvfc host struct | |
5626 | * @queue: ibmvfc queue to allocate | |
5627 | * @fmt: queue format to allocate | |
5628 | * | |
5629 | * Returns: | |
5630 | * 0 on success / non-zero on failure | |
5631 | **/ | |
5632 | static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, | |
5633 | struct ibmvfc_queue *queue, | |
5634 | enum ibmvfc_msg_fmt fmt) | |
5635 | { | |
5636 | struct device *dev = vhost->dev; | |
5637 | size_t fmt_size; | |
bb35ecb2 | 5638 | unsigned int pool_size = 0; |
f8968665 TD |
5639 | |
5640 | ENTER; | |
57e80e0b TD |
5641 | spin_lock_init(&queue->_lock); |
5642 | queue->q_lock = &queue->_lock; | |
5643 | ||
f8968665 TD |
5644 | switch (fmt) { |
5645 | case IBMVFC_CRQ_FMT: | |
5646 | fmt_size = sizeof(*queue->msgs.crq); | |
bb35ecb2 | 5647 | pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
f8968665 TD |
5648 | break; |
5649 | case IBMVFC_ASYNC_FMT: | |
5650 | fmt_size = sizeof(*queue->msgs.async); | |
5651 | break; | |
3034ebe2 TD |
5652 | case IBMVFC_SUB_CRQ_FMT: |
5653 | fmt_size = sizeof(*queue->msgs.scrq); | |
5654 | /* We need one extra event for Cancel Commands */ | |
5655 | pool_size = max_requests + 1; | |
5656 | break; | |
f8968665 TD |
5657 | default: |
5658 | dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); | |
5659 | return -EINVAL; | |
5660 | } | |
5661 | ||
bb35ecb2 TD |
5662 | if (ibmvfc_init_event_pool(vhost, queue, pool_size)) { |
5663 | dev_err(dev, "Couldn't initialize event pool.\n"); | |
5664 | return -ENOMEM; | |
5665 | } | |
5666 | ||
f8968665 TD |
5667 | queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); |
5668 | if (!queue->msgs.handle) | |
5669 | return -ENOMEM; | |
5670 | ||
5671 | queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, | |
5672 | DMA_BIDIRECTIONAL); | |
5673 | ||
5674 | if (dma_mapping_error(dev, queue->msg_token)) { | |
5675 | free_page((unsigned long)queue->msgs.handle); | |
5676 | queue->msgs.handle = NULL; | |
5677 | return -ENOMEM; | |
5678 | } | |
5679 | ||
5680 | queue->cur = 0; | |
5681 | queue->fmt = fmt; | |
5682 | queue->size = PAGE_SIZE / fmt_size; | |
5683 | return 0; | |
5684 | } | |
5685 | ||
072b91f9 BK |
5686 | /** |
5687 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor | |
5688 | * @vhost: ibmvfc host struct | |
5689 | * | |
5690 | * Allocates a page for messages, maps it for dma, and registers | |
5691 | * the crq with the hypervisor. | |
5692 | * | |
5693 | * Return value: | |
5694 | * zero on success / other on failure | |
5695 | **/ | |
5696 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) | |
5697 | { | |
5698 | int rc, retrc = -ENOMEM; | |
5699 | struct device *dev = vhost->dev; | |
5700 | struct vio_dev *vdev = to_vio_dev(dev); | |
f8968665 | 5701 | struct ibmvfc_queue *crq = &vhost->crq; |
072b91f9 BK |
5702 | |
5703 | ENTER; | |
f8968665 | 5704 | if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) |
072b91f9 BK |
5705 | return -ENOMEM; |
5706 | ||
072b91f9 BK |
5707 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
5708 | crq->msg_token, PAGE_SIZE); | |
5709 | ||
5710 | if (rc == H_RESOURCE) | |
5711 | /* maybe kexecing and resource is busy. try a reset */ | |
5712 | retrc = rc = ibmvfc_reset_crq(vhost); | |
5713 | ||
5714 | if (rc == H_CLOSED) | |
5715 | dev_warn(dev, "Partner adapter not ready\n"); | |
5716 | else if (rc) { | |
5717 | dev_warn(dev, "Error %d opening adapter\n", rc); | |
5718 | goto reg_crq_failed; | |
5719 | } | |
5720 | ||
5721 | retrc = 0; | |
5722 | ||
039a0898 BK |
5723 | tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); |
5724 | ||
072b91f9 BK |
5725 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
5726 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); | |
5727 | goto req_irq_failed; | |
5728 | } | |
5729 | ||
5730 | if ((rc = vio_enable_interrupts(vdev))) { | |
5731 | dev_err(dev, "Error %d enabling interrupts\n", rc); | |
5732 | goto req_irq_failed; | |
5733 | } | |
5734 | ||
072b91f9 BK |
5735 | LEAVE; |
5736 | return retrc; | |
5737 | ||
5738 | req_irq_failed: | |
039a0898 | 5739 | tasklet_kill(&vhost->tasklet); |
072b91f9 BK |
5740 | do { |
5741 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
5742 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
5743 | reg_crq_failed: | |
f8968665 | 5744 | ibmvfc_free_queue(vhost, crq); |
072b91f9 BK |
5745 | return retrc; |
5746 | } | |
5747 | ||
3034ebe2 TD |
5748 | static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, |
5749 | int index) | |
5750 | { | |
5751 | struct device *dev = vhost->dev; | |
5752 | struct vio_dev *vdev = to_vio_dev(dev); | |
5753 | struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; | |
5754 | int rc = -ENOMEM; | |
5755 | ||
5756 | ENTER; | |
5757 | ||
5758 | if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT)) | |
5759 | return -ENOMEM; | |
5760 | ||
5761 | rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, | |
5762 | &scrq->cookie, &scrq->hw_irq); | |
5763 | ||
2162dc23 TD |
5764 | /* H_CLOSED indicates successful register, but no CRQ partner */ |
5765 | if (rc && rc != H_CLOSED) { | |
3034ebe2 TD |
5766 | dev_warn(dev, "Error registering sub-crq: %d\n", rc); |
5767 | if (rc == H_PARAMETER) | |
5768 | dev_warn_once(dev, "Firmware may not support MQ\n"); | |
5769 | goto reg_failed; | |
5770 | } | |
5771 | ||
39e461fd TD |
5772 | scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); |
5773 | ||
5774 | if (!scrq->irq) { | |
5775 | rc = -EINVAL; | |
5776 | dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); | |
5777 | goto irq_failed; | |
5778 | } | |
5779 | ||
5780 | snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", | |
5781 | vdev->unit_address, index); | |
5782 | rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq); | |
5783 | ||
5784 | if (rc) { | |
5785 | dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); | |
5786 | irq_dispose_mapping(scrq->irq); | |
5787 | goto irq_failed; | |
5788 | } | |
5789 | ||
3034ebe2 TD |
5790 | scrq->hwq_id = index; |
5791 | scrq->vhost = vhost; | |
5792 | ||
5793 | LEAVE; | |
5794 | return 0; | |
5795 | ||
39e461fd TD |
5796 | irq_failed: |
5797 | do { | |
0217a272 TD |
5798 | rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); |
5799 | } while (rtas_busy_delay(rc)); | |
3034ebe2 TD |
5800 | reg_failed: |
5801 | ibmvfc_free_queue(vhost, scrq); | |
5802 | LEAVE; | |
5803 | return rc; | |
5804 | } | |
5805 | ||
5806 | static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) | |
5807 | { | |
5808 | struct device *dev = vhost->dev; | |
5809 | struct vio_dev *vdev = to_vio_dev(dev); | |
5810 | struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; | |
5811 | long rc; | |
5812 | ||
5813 | ENTER; | |
5814 | ||
39e461fd TD |
5815 | free_irq(scrq->irq, scrq); |
5816 | irq_dispose_mapping(scrq->irq); | |
5cf52964 | 5817 | scrq->irq = 0; |
39e461fd | 5818 | |
3034ebe2 TD |
5819 | do { |
5820 | rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, | |
5821 | scrq->cookie); | |
5822 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
5823 | ||
5824 | if (rc) | |
5825 | dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); | |
5826 | ||
5827 | ibmvfc_free_queue(vhost, scrq); | |
5828 | LEAVE; | |
5829 | } | |
5830 | ||
443cc4b4 | 5831 | static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) |
3034ebe2 TD |
5832 | { |
5833 | int i, j; | |
5834 | ||
5835 | ENTER; | |
443cc4b4 TD |
5836 | if (!vhost->mq_enabled) |
5837 | return; | |
3034ebe2 | 5838 | |
032d1900 | 5839 | vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, |
3034ebe2 TD |
5840 | sizeof(*vhost->scsi_scrqs.scrqs), |
5841 | GFP_KERNEL); | |
443cc4b4 TD |
5842 | if (!vhost->scsi_scrqs.scrqs) { |
5843 | vhost->do_enquiry = 0; | |
5844 | return; | |
5845 | } | |
3034ebe2 | 5846 | |
032d1900 | 5847 | for (i = 0; i < nr_scsi_hw_queues; i++) { |
3034ebe2 TD |
5848 | if (ibmvfc_register_scsi_channel(vhost, i)) { |
5849 | for (j = i; j > 0; j--) | |
5850 | ibmvfc_deregister_scsi_channel(vhost, j - 1); | |
5851 | kfree(vhost->scsi_scrqs.scrqs); | |
5852 | vhost->scsi_scrqs.scrqs = NULL; | |
5853 | vhost->scsi_scrqs.active_queues = 0; | |
443cc4b4 TD |
5854 | vhost->do_enquiry = 0; |
5855 | break; | |
3034ebe2 TD |
5856 | } |
5857 | } | |
5858 | ||
5859 | LEAVE; | |
3034ebe2 TD |
5860 | } |
5861 | ||
5862 | static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) | |
5863 | { | |
5864 | int i; | |
5865 | ||
5866 | ENTER; | |
5867 | if (!vhost->scsi_scrqs.scrqs) | |
5868 | return; | |
5869 | ||
032d1900 | 5870 | for (i = 0; i < nr_scsi_hw_queues; i++) |
3034ebe2 TD |
5871 | ibmvfc_deregister_scsi_channel(vhost, i); |
5872 | ||
5873 | kfree(vhost->scsi_scrqs.scrqs); | |
5874 | vhost->scsi_scrqs.scrqs = NULL; | |
5875 | vhost->scsi_scrqs.active_queues = 0; | |
5876 | LEAVE; | |
5877 | } | |
5878 | ||
072b91f9 BK |
5879 | /** |
5880 | * ibmvfc_free_mem - Free memory for vhost | |
5881 | * @vhost: ibmvfc host struct | |
5882 | * | |
5883 | * Return value: | |
5884 | * none | |
5885 | **/ | |
5886 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) | |
5887 | { | |
f8968665 | 5888 | struct ibmvfc_queue *async_q = &vhost->async_crq; |
072b91f9 BK |
5889 | |
5890 | ENTER; | |
5891 | mempool_destroy(vhost->tgt_pool); | |
5892 | kfree(vhost->trace); | |
5893 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, | |
5894 | vhost->disc_buf_dma); | |
5895 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), | |
5896 | vhost->login_buf, vhost->login_buf_dma); | |
febb0cc8 TD |
5897 | dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), |
5898 | vhost->channel_setup_buf, vhost->channel_setup_dma); | |
072b91f9 | 5899 | dma_pool_destroy(vhost->sg_pool); |
f8968665 | 5900 | ibmvfc_free_queue(vhost, async_q); |
072b91f9 BK |
5901 | LEAVE; |
5902 | } | |
5903 | ||
5904 | /** | |
5905 | * ibmvfc_alloc_mem - Allocate memory for vhost | |
5906 | * @vhost: ibmvfc host struct | |
5907 | * | |
5908 | * Return value: | |
5909 | * 0 on success / non-zero on failure | |
5910 | **/ | |
5911 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) | |
5912 | { | |
f8968665 | 5913 | struct ibmvfc_queue *async_q = &vhost->async_crq; |
072b91f9 BK |
5914 | struct device *dev = vhost->dev; |
5915 | ||
5916 | ENTER; | |
f8968665 TD |
5917 | if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { |
5918 | dev_err(dev, "Couldn't allocate/map async queue.\n"); | |
072b91f9 BK |
5919 | goto nomem; |
5920 | } | |
5921 | ||
072b91f9 BK |
5922 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, |
5923 | SG_ALL * sizeof(struct srp_direct_buf), | |
5924 | sizeof(struct srp_direct_buf), 0); | |
5925 | ||
5926 | if (!vhost->sg_pool) { | |
5927 | dev_err(dev, "Failed to allocate sg pool\n"); | |
5928 | goto unmap_async_crq; | |
5929 | } | |
5930 | ||
5931 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), | |
5932 | &vhost->login_buf_dma, GFP_KERNEL); | |
5933 | ||
5934 | if (!vhost->login_buf) { | |
5935 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); | |
5936 | goto free_sg_pool; | |
5937 | } | |
5938 | ||
4b29cb61 | 5939 | vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; |
072b91f9 BK |
5940 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, |
5941 | &vhost->disc_buf_dma, GFP_KERNEL); | |
5942 | ||
5943 | if (!vhost->disc_buf) { | |
5944 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); | |
5945 | goto free_login_buffer; | |
5946 | } | |
5947 | ||
5948 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, | |
5949 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); | |
57e80e0b | 5950 | atomic_set(&vhost->trace_index, -1); |
072b91f9 BK |
5951 | |
5952 | if (!vhost->trace) | |
5953 | goto free_disc_buffer; | |
5954 | ||
d6886692 | 5955 | vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
072b91f9 BK |
5956 | sizeof(struct ibmvfc_target)); |
5957 | ||
5958 | if (!vhost->tgt_pool) { | |
5959 | dev_err(dev, "Couldn't allocate target memory pool\n"); | |
5960 | goto free_trace; | |
5961 | } | |
5962 | ||
e95eef3f TD |
5963 | vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), |
5964 | &vhost->channel_setup_dma, | |
5965 | GFP_KERNEL); | |
5966 | ||
5967 | if (!vhost->channel_setup_buf) { | |
5968 | dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); | |
5969 | goto free_tgt_pool; | |
5970 | } | |
5971 | ||
072b91f9 BK |
5972 | LEAVE; |
5973 | return 0; | |
5974 | ||
e95eef3f TD |
5975 | free_tgt_pool: |
5976 | mempool_destroy(vhost->tgt_pool); | |
072b91f9 BK |
5977 | free_trace: |
5978 | kfree(vhost->trace); | |
5979 | free_disc_buffer: | |
5980 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, | |
5981 | vhost->disc_buf_dma); | |
5982 | free_login_buffer: | |
5983 | dma_free_coherent(dev, sizeof(*vhost->login_buf), | |
5984 | vhost->login_buf, vhost->login_buf_dma); | |
5985 | free_sg_pool: | |
5986 | dma_pool_destroy(vhost->sg_pool); | |
5987 | unmap_async_crq: | |
f8968665 | 5988 | ibmvfc_free_queue(vhost, async_q); |
072b91f9 BK |
5989 | nomem: |
5990 | LEAVE; | |
5991 | return -ENOMEM; | |
5992 | } | |
5993 | ||
43c8da90 BK |
5994 | /** |
5995 | * ibmvfc_rport_add_thread - Worker thread for rport adds | |
5996 | * @work: work struct | |
5997 | * | |
5998 | **/ | |
5999 | static void ibmvfc_rport_add_thread(struct work_struct *work) | |
6000 | { | |
6001 | struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, | |
6002 | rport_add_work_q); | |
6003 | struct ibmvfc_target *tgt; | |
6004 | struct fc_rport *rport; | |
6005 | unsigned long flags; | |
6006 | int did_work; | |
6007 | ||
6008 | ENTER; | |
6009 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
6010 | do { | |
6011 | did_work = 0; | |
6012 | if (vhost->state != IBMVFC_ACTIVE) | |
6013 | break; | |
6014 | ||
6015 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
6016 | if (tgt->add_rport) { | |
6017 | did_work = 1; | |
6018 | tgt->add_rport = 0; | |
6019 | kref_get(&tgt->kref); | |
6020 | rport = tgt->rport; | |
6021 | if (!rport) { | |
6022 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
6023 | ibmvfc_tgt_add_rport(tgt); | |
6024 | } else if (get_device(&rport->dev)) { | |
6025 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
6026 | tgt_dbg(tgt, "Setting rport roles\n"); | |
6027 | fc_remote_port_rolechg(rport, tgt->ids.roles); | |
6028 | put_device(&rport->dev); | |
0073887a DC |
6029 | } else { |
6030 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
43c8da90 BK |
6031 | } |
6032 | ||
6033 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
6034 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
6035 | break; | |
6036 | } | |
6037 | } | |
6038 | } while(did_work); | |
6039 | ||
6040 | if (vhost->state == IBMVFC_ACTIVE) | |
6041 | vhost->scan_complete = 1; | |
6042 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
6043 | LEAVE; | |
6044 | } | |
6045 | ||
072b91f9 BK |
6046 | /** |
6047 | * ibmvfc_probe - Adapter hot plug add entry point | |
6048 | * @vdev: vio device struct | |
6049 | * @id: vio device id struct | |
6050 | * | |
6051 | * Return value: | |
6052 | * 0 on success / non-zero on failure | |
6053 | **/ | |
6054 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
6055 | { | |
6056 | struct ibmvfc_host *vhost; | |
6057 | struct Scsi_Host *shost; | |
6058 | struct device *dev = &vdev->dev; | |
6059 | int rc = -ENOMEM; | |
032d1900 | 6060 | unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES; |
072b91f9 BK |
6061 | |
6062 | ENTER; | |
6063 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); | |
6064 | if (!shost) { | |
6065 | dev_err(dev, "Couldn't allocate host data\n"); | |
6066 | goto out; | |
6067 | } | |
6068 | ||
6069 | shost->transportt = ibmvfc_transport_template; | |
6070 | shost->can_queue = max_requests; | |
6071 | shost->max_lun = max_lun; | |
6072 | shost->max_id = max_targets; | |
6073 | shost->max_sectors = IBMVFC_MAX_SECTORS; | |
6074 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; | |
6075 | shost->unique_id = shost->host_no; | |
032d1900 | 6076 | shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; |
072b91f9 BK |
6077 | |
6078 | vhost = shost_priv(shost); | |
072b91f9 | 6079 | INIT_LIST_HEAD(&vhost->targets); |
57e80e0b | 6080 | INIT_LIST_HEAD(&vhost->purge); |
072b91f9 BK |
6081 | sprintf(vhost->name, IBMVFC_NAME); |
6082 | vhost->host = shost; | |
6083 | vhost->dev = dev; | |
6084 | vhost->partition_number = -1; | |
6085 | vhost->log_level = log_level; | |
10501e1c | 6086 | vhost->task_set = 1; |
6ae208e5 | 6087 | |
032d1900 TD |
6088 | vhost->mq_enabled = mq_enabled; |
6089 | vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); | |
6ae208e5 TD |
6090 | vhost->using_channels = 0; |
6091 | vhost->do_enquiry = 1; | |
7a3795f2 | 6092 | vhost->scan_timeout = 0; |
6ae208e5 | 6093 | |
072b91f9 BK |
6094 | strcpy(vhost->partition_name, "UNKNOWN"); |
6095 | init_waitqueue_head(&vhost->work_wait_q); | |
6096 | init_waitqueue_head(&vhost->init_wait_q); | |
43c8da90 | 6097 | INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); |
d31429e1 | 6098 | mutex_init(&vhost->passthru_mutex); |
072b91f9 BK |
6099 | |
6100 | if ((rc = ibmvfc_alloc_mem(vhost))) | |
6101 | goto free_scsi_host; | |
6102 | ||
6103 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, | |
6104 | shost->host_no); | |
6105 | ||
6106 | if (IS_ERR(vhost->work_thread)) { | |
6107 | dev_err(dev, "Couldn't create kernel thread: %ld\n", | |
6108 | PTR_ERR(vhost->work_thread)); | |
5e48a084 | 6109 | rc = PTR_ERR(vhost->work_thread); |
072b91f9 BK |
6110 | goto free_host_mem; |
6111 | } | |
6112 | ||
6113 | if ((rc = ibmvfc_init_crq(vhost))) { | |
6114 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); | |
6115 | goto kill_kthread; | |
6116 | } | |
6117 | ||
072b91f9 | 6118 | if ((rc = scsi_add_host(shost, dev))) |
003d91a1 | 6119 | goto release_crq; |
072b91f9 | 6120 | |
a5110f29 MC |
6121 | fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; |
6122 | ||
072b91f9 BK |
6123 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
6124 | &ibmvfc_trace_attr))) { | |
6125 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); | |
6126 | goto remove_shost; | |
6127 | } | |
6128 | ||
443cc4b4 | 6129 | ibmvfc_init_sub_crqs(vhost); |
3034ebe2 | 6130 | |
d31429e1 | 6131 | if (shost_to_fc_host(shost)->rqst_q) |
8a78362c | 6132 | blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); |
072b91f9 BK |
6133 | dev_set_drvdata(dev, vhost); |
6134 | spin_lock(&ibmvfc_driver_lock); | |
6135 | list_add_tail(&vhost->queue, &ibmvfc_head); | |
6136 | spin_unlock(&ibmvfc_driver_lock); | |
6137 | ||
6138 | ibmvfc_send_crq_init(vhost); | |
6139 | scsi_scan_host(shost); | |
6140 | return 0; | |
6141 | ||
6142 | remove_shost: | |
6143 | scsi_remove_host(shost); | |
072b91f9 BK |
6144 | release_crq: |
6145 | ibmvfc_release_crq_queue(vhost); | |
6146 | kill_kthread: | |
6147 | kthread_stop(vhost->work_thread); | |
6148 | free_host_mem: | |
6149 | ibmvfc_free_mem(vhost); | |
6150 | free_scsi_host: | |
6151 | scsi_host_put(shost); | |
6152 | out: | |
6153 | LEAVE; | |
6154 | return rc; | |
6155 | } | |
6156 | ||
6157 | /** | |
6158 | * ibmvfc_remove - Adapter hot plug remove entry point | |
6159 | * @vdev: vio device struct | |
6160 | * | |
6161 | * Return value: | |
6162 | * 0 | |
6163 | **/ | |
386a966f | 6164 | static void ibmvfc_remove(struct vio_dev *vdev) |
072b91f9 BK |
6165 | { |
6166 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); | |
57e80e0b | 6167 | LIST_HEAD(purge); |
072b91f9 BK |
6168 | unsigned long flags; |
6169 | ||
6170 | ENTER; | |
6171 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); | |
70431105 BK |
6172 | |
6173 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2d0da2a4 | 6174 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
70431105 BK |
6175 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
6176 | ||
2d0da2a4 | 6177 | ibmvfc_wait_while_resetting(vhost); |
072b91f9 BK |
6178 | kthread_stop(vhost->work_thread); |
6179 | fc_remove_host(vhost->host); | |
6180 | scsi_remove_host(vhost->host); | |
072b91f9 BK |
6181 | |
6182 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
6183 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
57e80e0b | 6184 | list_splice_init(&vhost->purge, &purge); |
072b91f9 | 6185 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
1f4a4a19 | 6186 | ibmvfc_complete_purge(&purge); |
3034ebe2 | 6187 | ibmvfc_release_sub_crqs(vhost); |
003d91a1 | 6188 | ibmvfc_release_crq_queue(vhost); |
072b91f9 BK |
6189 | |
6190 | ibmvfc_free_mem(vhost); | |
6191 | spin_lock(&ibmvfc_driver_lock); | |
6192 | list_del(&vhost->queue); | |
6193 | spin_unlock(&ibmvfc_driver_lock); | |
6194 | scsi_host_put(vhost->host); | |
6195 | LEAVE; | |
072b91f9 BK |
6196 | } |
6197 | ||
b0f4d4cf BK |
6198 | /** |
6199 | * ibmvfc_resume - Resume from suspend | |
6200 | * @dev: device struct | |
6201 | * | |
6202 | * We may have lost an interrupt across suspend/resume, so kick the | |
6203 | * interrupt handler | |
6204 | * | |
6205 | */ | |
6206 | static int ibmvfc_resume(struct device *dev) | |
6207 | { | |
6208 | unsigned long flags; | |
6209 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
6210 | struct vio_dev *vdev = to_vio_dev(dev); | |
6211 | ||
6212 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
6213 | vio_disable_interrupts(vdev); | |
6214 | tasklet_schedule(&vhost->tasklet); | |
6215 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
6216 | return 0; | |
6217 | } | |
6218 | ||
39c1ffec BK |
6219 | /** |
6220 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver | |
6221 | * @vdev: vio device struct | |
6222 | * | |
6223 | * Return value: | |
6224 | * Number of bytes the driver will need to DMA map at the same time in | |
6225 | * order to perform well. | |
6226 | */ | |
6227 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) | |
6228 | { | |
6229 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); | |
6230 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); | |
6231 | } | |
6232 | ||
e4df3eaa | 6233 | static const struct vio_device_id ibmvfc_device_table[] = { |
072b91f9 BK |
6234 | {"fcp", "IBM,vfc-client"}, |
6235 | { "", "" } | |
6236 | }; | |
6237 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); | |
6238 | ||
e4a80c31 | 6239 | static const struct dev_pm_ops ibmvfc_pm_ops = { |
b0f4d4cf BK |
6240 | .resume = ibmvfc_resume |
6241 | }; | |
6242 | ||
072b91f9 BK |
6243 | static struct vio_driver ibmvfc_driver = { |
6244 | .id_table = ibmvfc_device_table, | |
6245 | .probe = ibmvfc_probe, | |
6246 | .remove = ibmvfc_remove, | |
39c1ffec | 6247 | .get_desired_dma = ibmvfc_get_desired_dma, |
cb52d897 BH |
6248 | .name = IBMVFC_NAME, |
6249 | .pm = &ibmvfc_pm_ops, | |
072b91f9 BK |
6250 | }; |
6251 | ||
6252 | static struct fc_function_template ibmvfc_transport_functions = { | |
6253 | .show_host_fabric_name = 1, | |
6254 | .show_host_node_name = 1, | |
6255 | .show_host_port_name = 1, | |
6256 | .show_host_supported_classes = 1, | |
6257 | .show_host_port_type = 1, | |
6258 | .show_host_port_id = 1, | |
9ab3610f | 6259 | .show_host_maxframe_size = 1, |
072b91f9 BK |
6260 | |
6261 | .get_host_port_state = ibmvfc_get_host_port_state, | |
6262 | .show_host_port_state = 1, | |
6263 | ||
6264 | .get_host_speed = ibmvfc_get_host_speed, | |
6265 | .show_host_speed = 1, | |
6266 | ||
6267 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, | |
6268 | .terminate_rport_io = ibmvfc_terminate_rport_io, | |
6269 | ||
6270 | .show_rport_maxframe_size = 1, | |
6271 | .show_rport_supported_classes = 1, | |
6272 | ||
6273 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, | |
6274 | .show_rport_dev_loss_tmo = 1, | |
6275 | ||
6276 | .get_starget_node_name = ibmvfc_get_starget_node_name, | |
6277 | .show_starget_node_name = 1, | |
6278 | ||
6279 | .get_starget_port_name = ibmvfc_get_starget_port_name, | |
6280 | .show_starget_port_name = 1, | |
6281 | ||
6282 | .get_starget_port_id = ibmvfc_get_starget_port_id, | |
6283 | .show_starget_port_id = 1, | |
d31429e1 BK |
6284 | |
6285 | .bsg_request = ibmvfc_bsg_request, | |
6286 | .bsg_timeout = ibmvfc_bsg_timeout, | |
072b91f9 BK |
6287 | }; |
6288 | ||
6289 | /** | |
6290 | * ibmvfc_module_init - Initialize the ibmvfc module | |
6291 | * | |
6292 | * Return value: | |
6293 | * 0 on success / other on failure | |
6294 | **/ | |
6295 | static int __init ibmvfc_module_init(void) | |
6296 | { | |
6297 | int rc; | |
6298 | ||
6299 | if (!firmware_has_feature(FW_FEATURE_VIO)) | |
6300 | return -ENODEV; | |
6301 | ||
6302 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", | |
6303 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); | |
6304 | ||
6305 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); | |
6306 | if (!ibmvfc_transport_template) | |
6307 | return -ENOMEM; | |
6308 | ||
6309 | rc = vio_register_driver(&ibmvfc_driver); | |
6310 | if (rc) | |
6311 | fc_release_transport(ibmvfc_transport_template); | |
6312 | return rc; | |
6313 | } | |
6314 | ||
6315 | /** | |
6316 | * ibmvfc_module_exit - Teardown the ibmvfc module | |
6317 | * | |
6318 | * Return value: | |
6319 | * nothing | |
6320 | **/ | |
6321 | static void __exit ibmvfc_module_exit(void) | |
6322 | { | |
6323 | vio_unregister_driver(&ibmvfc_driver); | |
6324 | fc_release_transport(ibmvfc_transport_template); | |
6325 | } | |
6326 | ||
6327 | module_init(ibmvfc_module_init); | |
6328 | module_exit(ibmvfc_module_exit); |