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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
41fa2ada | 2 | /* |
553448f6 | 3 | * zfcp device driver |
1da177e4 | 4 | * |
553448f6 | 5 | * Interface to Linux SCSI midlayer. |
41fa2ada | 6 | * |
9fe5d2b2 | 7 | * Copyright IBM Corp. 2002, 2017 |
1da177e4 LT |
8 | */ |
9 | ||
ecf39d42 CS |
10 | #define KMSG_COMPONENT "zfcp" |
11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
12 | ||
3a4c5d59 | 13 | #include <linux/module.h> |
4318e08c | 14 | #include <linux/types.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
4318e08c | 16 | #include <scsi/fc/fc_fcp.h> |
ef3eb71d | 17 | #include <scsi/scsi_eh.h> |
60063497 | 18 | #include <linux/atomic.h> |
dcd20e23 CS |
19 | #include "zfcp_ext.h" |
20 | #include "zfcp_dbf.h" | |
7c7dc196 | 21 | #include "zfcp_fc.h" |
b6bd2fb9 | 22 | #include "zfcp_reqlist.h" |
1da177e4 | 23 | |
a40a1baf CS |
24 | static unsigned int default_depth = 32; |
25 | module_param_named(queue_depth, default_depth, uint, 0600); | |
26 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); | |
27 | ||
ef3eb71d | 28 | static bool enable_dif; |
cc405ace | 29 | module_param_named(dif, enable_dif, bool, 0400); |
ef3eb71d | 30 | MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); |
ef3eb71d | 31 | |
5156934b | 32 | static bool allow_lun_scan = true; |
0d81b4e8 CS |
33 | module_param(allow_lun_scan, bool, 0600); |
34 | MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); | |
35 | ||
b62a8d9b | 36 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
1da177e4 | 37 | { |
b62a8d9b CS |
38 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
39 | ||
44f747ff SM |
40 | /* if previous slave_alloc returned early, there is nothing to do */ |
41 | if (!zfcp_sdev->port) | |
42 | return; | |
43 | ||
b62a8d9b CS |
44 | zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); |
45 | put_device(&zfcp_sdev->port->dev); | |
1da177e4 LT |
46 | } |
47 | ||
f76af7d7 | 48 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
49 | { |
50 | if (sdp->tagged_supported) | |
db5ed4df | 51 | scsi_change_queue_depth(sdp, default_depth); |
1da177e4 LT |
52 | return 0; |
53 | } | |
54 | ||
f76af7d7 | 55 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 56 | { |
feac6a07 | 57 | set_host_byte(scpnt, result); |
250a1352 | 58 | zfcp_dbf_scsi_fail_send(scpnt); |
1da177e4 LT |
59 | scpnt->scsi_done(scpnt); |
60 | } | |
61 | ||
e55f8753 CS |
62 | static |
63 | int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) | |
1da177e4 | 64 | { |
b62a8d9b | 65 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
a2fa0aed | 66 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
b62a8d9b | 67 | int status, scsi_result, ret; |
1da177e4 LT |
68 | |
69 | /* reset the status for this request */ | |
70 | scpnt->result = 0; | |
71 | scpnt->host_scribble = NULL; | |
1da177e4 | 72 | |
a2fa0aed CS |
73 | scsi_result = fc_remote_port_chkready(rport); |
74 | if (unlikely(scsi_result)) { | |
75 | scpnt->result = scsi_result; | |
250a1352 | 76 | zfcp_dbf_scsi_fail_send(scpnt); |
a2fa0aed CS |
77 | scpnt->scsi_done(scpnt); |
78 | return 0; | |
79 | } | |
80 | ||
b62a8d9b | 81 | status = atomic_read(&zfcp_sdev->status); |
8830271c | 82 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
b62a8d9b | 83 | !(atomic_read(&zfcp_sdev->port->status) & |
8830271c | 84 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
b62a8d9b | 85 | /* only LUN access denied, but port is good |
8830271c | 86 | * not covered by FC transport, have to fail here */ |
f76af7d7 | 87 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 88 | return 0; |
f76af7d7 MP |
89 | } |
90 | ||
8830271c | 91 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
6f2ce1c6 | 92 | /* This could be |
8830271c CS |
93 | * call to rport_delete pending: mimic retry from |
94 | * fc_remote_port_chkready until rport is BLOCKED | |
95 | */ | |
96 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
97 | return 0; | |
98 | } | |
99 | ||
b62a8d9b | 100 | ret = zfcp_fsf_fcp_cmnd(scpnt); |
f76af7d7 | 101 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 102 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
103 | else if (unlikely(ret < 0)) |
104 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 105 | |
f76af7d7 | 106 | return ret; |
1da177e4 LT |
107 | } |
108 | ||
b62a8d9b | 109 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 110 | { |
b62a8d9b CS |
111 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
112 | struct zfcp_adapter *adapter = | |
113 | (struct zfcp_adapter *) sdev->host->hostdata[0]; | |
114 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
1da177e4 | 115 | struct zfcp_port *port; |
f76af7d7 | 116 | struct zfcp_unit *unit; |
0d81b4e8 | 117 | int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; |
1da177e4 | 118 | |
ab31fd0c SM |
119 | zfcp_sdev->erp_action.adapter = adapter; |
120 | zfcp_sdev->erp_action.sdev = sdev; | |
121 | ||
b62a8d9b CS |
122 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
123 | if (!port) | |
124 | return -ENXIO; | |
f76af7d7 | 125 | |
ab31fd0c SM |
126 | zfcp_sdev->erp_action.port = port; |
127 | ||
b62a8d9b CS |
128 | unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
129 | if (unit) | |
130 | put_device(&unit->dev); | |
f76af7d7 | 131 | |
0d81b4e8 | 132 | if (!unit && !(allow_lun_scan && npiv)) { |
b62a8d9b CS |
133 | put_device(&port->dev); |
134 | return -ENXIO; | |
f76af7d7 | 135 | } |
f76af7d7 | 136 | |
b62a8d9b CS |
137 | zfcp_sdev->port = port; |
138 | zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; | |
139 | zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; | |
140 | zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; | |
141 | zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; | |
142 | zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; | |
143 | zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
144 | spin_lock_init(&zfcp_sdev->latencies.lock); | |
f76af7d7 | 145 | |
edaed859 | 146 | zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
ea4a3a6a | 147 | zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
b62a8d9b CS |
148 | zfcp_erp_wait(port->adapter); |
149 | ||
150 | return 0; | |
1da177e4 LT |
151 | } |
152 | ||
2b67fc46 | 153 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 154 | { |
63caf367 CS |
155 | struct Scsi_Host *scsi_host = scpnt->device->host; |
156 | struct zfcp_adapter *adapter = | |
157 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
63caf367 | 158 | struct zfcp_fsf_req *old_req, *abrt_req; |
1da177e4 | 159 | unsigned long flags; |
a11a52be | 160 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
a1dbfddd | 161 | int retval = SUCCESS, ret; |
63caf367 | 162 | int retry = 3; |
a11a52be | 163 | char *dbf_tag; |
1da177e4 | 164 | |
059c97d0 | 165 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
166 | write_lock_irqsave(&adapter->abort_lock, flags); |
167 | ||
b6bd2fb9 | 168 | old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
63caf367 | 169 | if (!old_req) { |
1da177e4 | 170 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
250a1352 | 171 | zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
c6936e7f | 172 | return FAILED; /* completion could be in progress */ |
1da177e4 | 173 | } |
63caf367 | 174 | old_req->data = NULL; |
1da177e4 | 175 | |
4eff4a36 | 176 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 177 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 178 | |
63caf367 | 179 | while (retry--) { |
b62a8d9b | 180 | abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
63caf367 CS |
181 | if (abrt_req) |
182 | break; | |
183 | ||
184 | zfcp_erp_wait(adapter); | |
a1dbfddd | 185 | ret = fc_block_scsi_eh(scpnt); |
250a1352 SS |
186 | if (ret) { |
187 | zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); | |
a1dbfddd | 188 | return ret; |
250a1352 | 189 | } |
63caf367 CS |
190 | if (!(atomic_read(&adapter->status) & |
191 | ZFCP_STATUS_COMMON_RUNNING)) { | |
250a1352 | 192 | zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
63caf367 CS |
193 | return SUCCESS; |
194 | } | |
1da177e4 | 195 | } |
250a1352 SS |
196 | if (!abrt_req) { |
197 | zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); | |
63caf367 | 198 | return FAILED; |
250a1352 | 199 | } |
1da177e4 | 200 | |
058b8647 | 201 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 202 | |
63caf367 | 203 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
250a1352 | 204 | dbf_tag = "abrt_ok"; |
63caf367 | 205 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
250a1352 | 206 | dbf_tag = "abrt_nn"; |
63caf367 | 207 | else { |
250a1352 | 208 | dbf_tag = "abrt_fa"; |
1da177e4 | 209 | retval = FAILED; |
1da177e4 | 210 | } |
250a1352 | 211 | zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
63caf367 | 212 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 213 | return retval; |
1da177e4 LT |
214 | } |
215 | ||
dac37e15 BB |
216 | struct zfcp_scsi_req_filter { |
217 | u8 tmf_scope; | |
218 | u32 lun_handle; | |
219 | u32 port_handle; | |
220 | }; | |
221 | ||
222 | static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data) | |
223 | { | |
224 | struct zfcp_scsi_req_filter *filter = | |
225 | (struct zfcp_scsi_req_filter *)data; | |
226 | ||
227 | /* already aborted - prevent side-effects - or not a SCSI command */ | |
228 | if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND) | |
229 | return; | |
230 | ||
231 | /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */ | |
232 | if (old_req->qtcb->header.port_handle != filter->port_handle) | |
233 | return; | |
234 | ||
235 | if (filter->tmf_scope == FCP_TMF_LUN_RESET && | |
236 | old_req->qtcb->header.lun_handle != filter->lun_handle) | |
237 | return; | |
238 | ||
239 | zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req); | |
240 | old_req->data = NULL; | |
241 | } | |
242 | ||
243 | static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags) | |
244 | { | |
245 | struct zfcp_adapter *adapter = zsdev->port->adapter; | |
246 | struct zfcp_scsi_req_filter filter = { | |
247 | .tmf_scope = FCP_TMF_TGT_RESET, | |
248 | .port_handle = zsdev->port->handle, | |
249 | }; | |
250 | unsigned long flags; | |
251 | ||
252 | if (tm_flags == FCP_TMF_LUN_RESET) { | |
253 | filter.tmf_scope = FCP_TMF_LUN_RESET; | |
254 | filter.lun_handle = zsdev->lun_handle; | |
255 | } | |
256 | ||
257 | /* | |
258 | * abort_lock secures against other processings - in the abort-function | |
259 | * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data | |
260 | */ | |
261 | write_lock_irqsave(&adapter->abort_lock, flags); | |
262 | zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd, | |
263 | &filter); | |
264 | write_unlock_irqrestore(&adapter->abort_lock, flags); | |
265 | } | |
266 | ||
63caf367 | 267 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 268 | { |
b62a8d9b CS |
269 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
270 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
564e1c86 | 271 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 272 | int retval = SUCCESS, ret; |
63caf367 CS |
273 | int retry = 3; |
274 | ||
275 | while (retry--) { | |
b62a8d9b | 276 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
277 | if (fsf_req) |
278 | break; | |
279 | ||
280 | zfcp_erp_wait(adapter); | |
a1dbfddd | 281 | ret = fc_block_scsi_eh(scpnt); |
1a5d999e SM |
282 | if (ret) { |
283 | zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL); | |
a1dbfddd | 284 | return ret; |
1a5d999e | 285 | } |
a1dbfddd | 286 | |
63caf367 CS |
287 | if (!(atomic_read(&adapter->status) & |
288 | ZFCP_STATUS_COMMON_RUNNING)) { | |
9fe5d2b2 | 289 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL); |
63caf367 CS |
290 | return SUCCESS; |
291 | } | |
1da177e4 | 292 | } |
1a5d999e SM |
293 | if (!fsf_req) { |
294 | zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL); | |
63caf367 | 295 | return FAILED; |
1a5d999e | 296 | } |
1da177e4 | 297 | |
058b8647 | 298 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 299 | |
8a36e453 | 300 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
9fe5d2b2 | 301 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req); |
f76af7d7 | 302 | retval = FAILED; |
dac37e15 | 303 | } else { |
9fe5d2b2 | 304 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req); |
dac37e15 BB |
305 | zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags); |
306 | } | |
77eb1699 AH |
307 | |
308 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
309 | return retval; |
310 | } | |
311 | ||
f76af7d7 MP |
312 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
313 | { | |
4318e08c | 314 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
315 | } |
316 | ||
317 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
318 | { | |
4318e08c | 319 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
320 | } |
321 | ||
2b67fc46 | 322 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 323 | { |
b62a8d9b CS |
324 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
325 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 326 | int ret; |
1da177e4 | 327 | |
ea4a3a6a | 328 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
81654286 | 329 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
330 | ret = fc_block_scsi_eh(scpnt); |
331 | if (ret) | |
332 | return ret; | |
1da177e4 | 333 | |
810f1e3e | 334 | return SUCCESS; |
1da177e4 LT |
335 | } |
336 | ||
1947c72a CS |
337 | struct scsi_transport_template *zfcp_scsi_transport_template; |
338 | ||
339 | static struct scsi_host_template zfcp_scsi_host_template = { | |
340 | .module = THIS_MODULE, | |
341 | .name = "zfcp", | |
342 | .queuecommand = zfcp_scsi_queuecommand, | |
b6a05c82 | 343 | .eh_timed_out = fc_eh_timed_out, |
1947c72a CS |
344 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, |
345 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
346 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
347 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
348 | .slave_alloc = zfcp_scsi_slave_alloc, | |
349 | .slave_configure = zfcp_scsi_slave_configure, | |
350 | .slave_destroy = zfcp_scsi_slave_destroy, | |
db5ed4df | 351 | .change_queue_depth = scsi_change_queue_depth, |
1947c72a CS |
352 | .proc_name = "zfcp", |
353 | .can_queue = 4096, | |
354 | .this_id = -1, | |
5fea4291 SM |
355 | .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
356 | * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), | |
357 | /* GCD, adjusted later */ | |
358 | .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) | |
359 | * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, | |
360 | /* GCD, adjusted later */ | |
1947c72a | 361 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
1947c72a CS |
362 | .use_clustering = 1, |
363 | .shost_attrs = zfcp_sysfs_shost_attrs, | |
364 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
c40ecc12 | 365 | .track_queue_depth = 1, |
1947c72a CS |
366 | }; |
367 | ||
368 | /** | |
369 | * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer | |
370 | * @adapter: The zfcp adapter to register with the SCSI midlayer | |
371 | */ | |
372 | int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) | |
1da177e4 | 373 | { |
f76af7d7 | 374 | struct ccw_dev_id dev_id; |
1da177e4 | 375 | |
9f28745a | 376 | if (adapter->scsi_host) |
f76af7d7 | 377 | return 0; |
9f28745a | 378 | |
f76af7d7 | 379 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 | 380 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
1947c72a | 381 | adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
1da177e4 LT |
382 | sizeof (struct zfcp_adapter *)); |
383 | if (!adapter->scsi_host) { | |
553448f6 | 384 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
385 | "Registering the FCP device with the " |
386 | "SCSI stack failed\n"); | |
f76af7d7 | 387 | return -EIO; |
1da177e4 | 388 | } |
1da177e4 LT |
389 | |
390 | /* tell the SCSI stack some characteristics of this adapter */ | |
f8210e34 CS |
391 | adapter->scsi_host->max_id = 511; |
392 | adapter->scsi_host->max_lun = 0xFFFFFFFF; | |
1da177e4 | 393 | adapter->scsi_host->max_channel = 0; |
f76af7d7 | 394 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 395 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
1947c72a | 396 | adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
1da177e4 | 397 | |
1da177e4 LT |
398 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
399 | ||
400 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
401 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 402 | return -EIO; |
1da177e4 | 403 | } |
f76af7d7 MP |
404 | |
405 | return 0; | |
1da177e4 LT |
406 | } |
407 | ||
1947c72a CS |
408 | /** |
409 | * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer | |
410 | * @adapter: The zfcp adapter to unregister. | |
411 | */ | |
412 | void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) | |
1da177e4 LT |
413 | { |
414 | struct Scsi_Host *shost; | |
13e1e1f0 | 415 | struct zfcp_port *port; |
1da177e4 LT |
416 | |
417 | shost = adapter->scsi_host; | |
418 | if (!shost) | |
419 | return; | |
f76af7d7 | 420 | |
ecf0c772 SS |
421 | read_lock_irq(&adapter->port_list_lock); |
422 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 423 | port->rport = NULL; |
ecf0c772 | 424 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 425 | |
3859f6a2 | 426 | fc_remove_host(shost); |
1da177e4 LT |
427 | scsi_remove_host(shost); |
428 | scsi_host_put(shost); | |
429 | adapter->scsi_host = NULL; | |
1da177e4 LT |
430 | } |
431 | ||
f6cd94b1 AH |
432 | static struct fc_host_statistics* |
433 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 434 | { |
f6cd94b1 | 435 | struct fc_host_statistics *fc_stats; |
1da177e4 | 436 | |
f6cd94b1 AH |
437 | if (!adapter->fc_stats) { |
438 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
439 | if (!fc_stats) | |
440 | return NULL; | |
f3450c7b | 441 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
442 | } |
443 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
444 | return adapter->fc_stats; | |
1da177e4 LT |
445 | } |
446 | ||
f76af7d7 MP |
447 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
448 | struct fsf_qtcb_bottom_port *data, | |
449 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 450 | { |
f76af7d7 MP |
451 | fc_stats->seconds_since_last_reset = |
452 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
453 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
454 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
455 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
456 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
457 | fc_stats->lip_count = data->lip - old->lip; | |
458 | fc_stats->nos_count = data->nos - old->nos; | |
459 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
460 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
461 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
462 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
463 | fc_stats->loss_of_signal_count = |
464 | data->loss_of_signal - old->loss_of_signal; | |
465 | fc_stats->prim_seq_protocol_err_count = | |
466 | data->psp_error_counts - old->psp_error_counts; | |
467 | fc_stats->invalid_tx_word_count = | |
468 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 469 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
470 | fc_stats->fcp_input_requests = |
471 | data->input_requests - old->input_requests; | |
472 | fc_stats->fcp_output_requests = | |
473 | data->output_requests - old->output_requests; | |
474 | fc_stats->fcp_control_requests = | |
475 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
476 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
477 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
478 | } | |
1da177e4 | 479 | |
f76af7d7 MP |
480 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
481 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
482 | { |
483 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
484 | fc_stats->tx_frames = data->tx_frames; | |
485 | fc_stats->tx_words = data->tx_words; | |
486 | fc_stats->rx_frames = data->rx_frames; | |
487 | fc_stats->rx_words = data->rx_words; | |
488 | fc_stats->lip_count = data->lip; | |
489 | fc_stats->nos_count = data->nos; | |
490 | fc_stats->error_frames = data->error_frames; | |
491 | fc_stats->dumped_frames = data->dumped_frames; | |
492 | fc_stats->link_failure_count = data->link_failure; | |
493 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
494 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
495 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
496 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
497 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
498 | fc_stats->fcp_input_requests = data->input_requests; | |
499 | fc_stats->fcp_output_requests = data->output_requests; | |
500 | fc_stats->fcp_control_requests = data->control_requests; | |
501 | fc_stats->fcp_input_megabytes = data->input_mb; | |
502 | fc_stats->fcp_output_megabytes = data->output_mb; | |
503 | } | |
504 | ||
f76af7d7 | 505 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
506 | { |
507 | struct zfcp_adapter *adapter; | |
508 | struct fc_host_statistics *fc_stats; | |
509 | struct fsf_qtcb_bottom_port *data; | |
510 | int ret; | |
511 | ||
f76af7d7 | 512 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
513 | fc_stats = zfcp_init_fc_host_stats(adapter); |
514 | if (!fc_stats) | |
515 | return NULL; | |
516 | ||
ec4081c6 | 517 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
518 | if (!data) |
519 | return NULL; | |
f6cd94b1 | 520 | |
564e1c86 | 521 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
522 | if (ret) { |
523 | kfree(data); | |
f76af7d7 | 524 | return NULL; |
f6cd94b1 AH |
525 | } |
526 | ||
527 | if (adapter->stats_reset && | |
528 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 529 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
530 | zfcp_adjust_fc_host_stats(fc_stats, data, |
531 | adapter->stats_reset_data); | |
f76af7d7 | 532 | else |
f6cd94b1 AH |
533 | zfcp_set_fc_host_stats(fc_stats, data); |
534 | ||
535 | kfree(data); | |
536 | return fc_stats; | |
1da177e4 LT |
537 | } |
538 | ||
f76af7d7 | 539 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 540 | { |
f6cd94b1 | 541 | struct zfcp_adapter *adapter; |
f76af7d7 | 542 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 543 | int ret; |
1da177e4 | 544 | |
f6cd94b1 | 545 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 546 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
547 | if (!data) |
548 | return; | |
f6cd94b1 | 549 | |
564e1c86 | 550 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 551 | if (ret) |
83f6d6d7 | 552 | kfree(data); |
f76af7d7 | 553 | else { |
f6cd94b1 | 554 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 555 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 556 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 557 | adapter_release */ |
f6cd94b1 | 558 | } |
1da177e4 LT |
559 | } |
560 | ||
85a82392 SS |
561 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
562 | { | |
563 | struct zfcp_adapter *adapter = | |
564 | (struct zfcp_adapter *)shost->hostdata[0]; | |
565 | int status = atomic_read(&adapter->status); | |
566 | ||
567 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
568 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
569 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
570 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
571 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
572 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
573 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
574 | else | |
575 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
576 | } | |
577 | ||
338151e0 AH |
578 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
579 | { | |
580 | rport->dev_loss_tmo = timeout; | |
581 | } | |
582 | ||
a2fa0aed CS |
583 | /** |
584 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
585 | * @rport: The FC rport where to teminate I/O | |
586 | * | |
587 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
588 | * port. Using a reopen avoids a conflict with a shutdown |
589 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
590 | * is not opened again as valid due to the cached plogi data in | |
591 | * non-NPIV mode. | |
a2fa0aed CS |
592 | */ |
593 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
594 | { | |
70932935 | 595 | struct zfcp_port *port; |
ea945ff8 SS |
596 | struct Scsi_Host *shost = rport_to_shost(rport); |
597 | struct zfcp_adapter *adapter = | |
598 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 599 | |
ea945ff8 | 600 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 601 | |
70932935 | 602 | if (port) { |
ea4a3a6a | 603 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
615f59e0 | 604 | put_device(&port->dev); |
70932935 | 605 | } |
a2fa0aed CS |
606 | } |
607 | ||
608 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
609 | { | |
610 | struct fc_rport_identifiers ids; | |
611 | struct fc_rport *rport; | |
612 | ||
379d6bf6 CS |
613 | if (port->rport) |
614 | return; | |
615 | ||
a2fa0aed CS |
616 | ids.node_name = port->wwnn; |
617 | ids.port_name = port->wwpn; | |
618 | ids.port_id = port->d_id; | |
619 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
620 | ||
4eeaa4f3 SM |
621 | zfcp_dbf_rec_trig("scpaddy", port->adapter, port, NULL, |
622 | ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD, | |
623 | ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD); | |
a2fa0aed CS |
624 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); |
625 | if (!rport) { | |
626 | dev_err(&port->adapter->ccw_device->dev, | |
627 | "Registering port 0x%016Lx failed\n", | |
628 | (unsigned long long)port->wwpn); | |
629 | return; | |
630 | } | |
631 | ||
a2fa0aed CS |
632 | rport->maxframe_size = port->maxframe_size; |
633 | rport->supported_classes = port->supported_classes; | |
634 | port->rport = rport; | |
1bf3ff02 | 635 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 636 | |
1daa4eb5 | 637 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
638 | } |
639 | ||
640 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
641 | { | |
70932935 CS |
642 | struct fc_rport *rport = port->rport; |
643 | ||
379d6bf6 | 644 | if (rport) { |
4eeaa4f3 SM |
645 | zfcp_dbf_rec_trig("scpdely", port->adapter, port, NULL, |
646 | ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL, | |
647 | ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL); | |
70932935 | 648 | fc_remote_port_delete(rport); |
379d6bf6 CS |
649 | port->rport = NULL; |
650 | } | |
a2fa0aed CS |
651 | } |
652 | ||
653 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
654 | { | |
615f59e0 | 655 | get_device(&port->dev); |
a2fa0aed CS |
656 | port->rport_task = RPORT_ADD; |
657 | ||
4544683a | 658 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 659 | put_device(&port->dev); |
a2fa0aed CS |
660 | } |
661 | ||
662 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
663 | { | |
615f59e0 | 664 | get_device(&port->dev); |
a2fa0aed CS |
665 | port->rport_task = RPORT_DEL; |
666 | ||
4544683a SS |
667 | if (port->rport && queue_work(port->adapter->work_queue, |
668 | &port->rport_work)) | |
a67417ab SS |
669 | return; |
670 | ||
615f59e0 | 671 | put_device(&port->dev); |
a2fa0aed CS |
672 | } |
673 | ||
674 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
675 | { | |
ecf0c772 | 676 | unsigned long flags; |
a2fa0aed CS |
677 | struct zfcp_port *port; |
678 | ||
ecf0c772 SS |
679 | read_lock_irqsave(&adapter->port_list_lock, flags); |
680 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 681 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 682 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
683 | } |
684 | ||
685 | void zfcp_scsi_rport_work(struct work_struct *work) | |
686 | { | |
687 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
688 | rport_work); | |
689 | ||
690 | while (port->rport_task) { | |
691 | if (port->rport_task == RPORT_ADD) { | |
692 | port->rport_task = RPORT_NONE; | |
693 | zfcp_scsi_rport_register(port); | |
694 | } else { | |
695 | port->rport_task = RPORT_NONE; | |
696 | zfcp_scsi_rport_block(port); | |
697 | } | |
698 | } | |
699 | ||
615f59e0 | 700 | put_device(&port->dev); |
a2fa0aed CS |
701 | } |
702 | ||
ef3eb71d FB |
703 | /** |
704 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
705 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
706 | */ | |
707 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
708 | { | |
709 | unsigned int mask = 0; | |
710 | unsigned int data_div; | |
711 | struct Scsi_Host *shost = adapter->scsi_host; | |
712 | ||
713 | data_div = atomic_read(&adapter->status) & | |
714 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
715 | ||
716 | if (enable_dif && | |
717 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
718 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
719 | ||
720 | if (enable_dif && data_div && | |
721 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
722 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
723 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
86a9668a SS |
724 | shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; |
725 | shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; | |
726 | shost->max_sectors = shost->sg_tablesize * 8; | |
ef3eb71d FB |
727 | } |
728 | ||
729 | scsi_host_set_prot(shost, mask); | |
730 | } | |
731 | ||
732 | /** | |
733 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
734 | * @scmd: The SCSI command to report the error for | |
735 | * @ascq: The ASCQ to put in the sense buffer | |
736 | * | |
737 | * See the error handling in sd_done for the sense codes used here. | |
738 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
739 | */ | |
740 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
741 | { | |
742 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
743 | ILLEGAL_REQUEST, 0x10, ascq); | |
744 | set_driver_byte(scmd, DRIVER_SENSE); | |
745 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
746 | set_host_byte(scmd, DID_SOFT_ERROR); | |
747 | } | |
748 | ||
1da177e4 | 749 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
750 | .show_starget_port_id = 1, |
751 | .show_starget_port_name = 1, | |
752 | .show_starget_node_name = 1, | |
3859f6a2 | 753 | .show_rport_supported_classes = 1, |
75bfc283 | 754 | .show_rport_maxframe_size = 1, |
338151e0 | 755 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
756 | .show_host_node_name = 1, |
757 | .show_host_port_name = 1, | |
ad757cdf | 758 | .show_host_permanent_port_name = 1, |
3859f6a2 | 759 | .show_host_supported_classes = 1, |
0fdd2133 | 760 | .show_host_supported_fc4s = 1, |
ad757cdf | 761 | .show_host_supported_speeds = 1, |
13e1e1f0 | 762 | .show_host_maxframe_size = 1, |
3859f6a2 | 763 | .show_host_serial_number = 1, |
f6cd94b1 AH |
764 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
765 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 766 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 767 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 768 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 769 | .show_host_port_state = 1, |
0fdd2133 | 770 | .show_host_active_fc4s = 1, |
7c7dc196 | 771 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 772 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
773 | /* no functions registered for following dynamic attributes but |
774 | directly set by LLDD */ | |
ad757cdf | 775 | .show_host_port_type = 1, |
038d9446 | 776 | .show_host_symbolic_name = 1, |
13e1e1f0 AH |
777 | .show_host_speed = 1, |
778 | .show_host_port_id = 1, | |
7c7dc196 | 779 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 | 780 | }; |