2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
34 #include <linux/stringify.h>
35 #include <asm/firmware.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_tcq.h>
43 #include <scsi/scsi_transport_fc.h>
44 #include <scsi/scsi_bsg_fc.h>
47 static unsigned int init_timeout
= IBMVFC_INIT_TIMEOUT
;
48 static unsigned int default_timeout
= IBMVFC_DEFAULT_TIMEOUT
;
49 static u64 max_lun
= IBMVFC_MAX_LUN
;
50 static unsigned int max_targets
= IBMVFC_MAX_TARGETS
;
51 static unsigned int max_requests
= IBMVFC_MAX_REQUESTS_DEFAULT
;
52 static unsigned int disc_threads
= IBMVFC_MAX_DISC_THREADS
;
53 static unsigned int ibmvfc_debug
= IBMVFC_DEBUG
;
54 static unsigned int log_level
= IBMVFC_DEFAULT_LOG_LEVEL
;
55 static LIST_HEAD(ibmvfc_head
);
56 static DEFINE_SPINLOCK(ibmvfc_driver_lock
);
57 static struct scsi_transport_template
*ibmvfc_transport_template
;
59 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
60 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
61 MODULE_LICENSE("GPL");
62 MODULE_VERSION(IBMVFC_DRIVER_VERSION
);
64 module_param_named(init_timeout
, init_timeout
, uint
, S_IRUGO
| S_IWUSR
);
65 MODULE_PARM_DESC(init_timeout
, "Initialization timeout in seconds. "
66 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT
) "]");
67 module_param_named(default_timeout
, default_timeout
, uint
, S_IRUGO
| S_IWUSR
);
68 MODULE_PARM_DESC(default_timeout
,
69 "Default timeout in seconds for initialization and EH commands. "
70 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT
) "]");
71 module_param_named(max_requests
, max_requests
, uint
, S_IRUGO
);
72 MODULE_PARM_DESC(max_requests
, "Maximum requests for this adapter. "
73 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT
) "]");
74 module_param_named(max_lun
, max_lun
, ullong
, S_IRUGO
);
75 MODULE_PARM_DESC(max_lun
, "Maximum allowed LUN. "
76 "[Default=" __stringify(IBMVFC_MAX_LUN
) "]");
77 module_param_named(max_targets
, max_targets
, uint
, S_IRUGO
);
78 MODULE_PARM_DESC(max_targets
, "Maximum allowed targets. "
79 "[Default=" __stringify(IBMVFC_MAX_TARGETS
) "]");
80 module_param_named(disc_threads
, disc_threads
, uint
, S_IRUGO
);
81 MODULE_PARM_DESC(disc_threads
, "Number of device discovery threads to use. "
82 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS
) "]");
83 module_param_named(debug
, ibmvfc_debug
, uint
, S_IRUGO
| S_IWUSR
);
84 MODULE_PARM_DESC(debug
, "Enable driver debug information. "
85 "[Default=" __stringify(IBMVFC_DEBUG
) "]");
86 module_param_named(log_level
, log_level
, uint
, 0);
87 MODULE_PARM_DESC(log_level
, "Set to 0 - 4 for increasing verbosity of device driver. "
88 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL
) "]");
98 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_ESTABLISH
, DID_ERROR
, 1, 1, "unable to establish" },
99 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_FAULT
, DID_OK
, 1, 0, "transport fault" },
100 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CMD_TIMEOUT
, DID_TIME_OUT
, 1, 1, "command timeout" },
101 { IBMVFC_FABRIC_MAPPED
, IBMVFC_ENETDOWN
, DID_TRANSPORT_DISRUPTED
, 1, 1, "network down" },
102 { IBMVFC_FABRIC_MAPPED
, IBMVFC_HW_FAILURE
, DID_ERROR
, 1, 1, "hardware failure" },
103 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DOWN_ERR
, DID_REQUEUE
, 0, 0, "link down" },
104 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DEAD_ERR
, DID_ERROR
, 0, 0, "link dead" },
105 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_REGISTER
, DID_ERROR
, 1, 1, "unable to register" },
106 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_BUSY
, DID_BUS_BUSY
, 1, 0, "transport busy" },
107 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_DEAD
, DID_ERROR
, 0, 1, "transport dead" },
108 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CONFIG_ERROR
, DID_ERROR
, 1, 1, "configuration error" },
109 { IBMVFC_FABRIC_MAPPED
, IBMVFC_NAME_SERVER_FAIL
, DID_ERROR
, 1, 1, "name server failure" },
110 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_HALTED
, DID_REQUEUE
, 1, 0, "link halted" },
111 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_GENERAL
, DID_OK
, 1, 0, "general transport error" },
113 { IBMVFC_VIOS_FAILURE
, IBMVFC_CRQ_FAILURE
, DID_REQUEUE
, 1, 1, "CRQ failure" },
114 { IBMVFC_VIOS_FAILURE
, IBMVFC_SW_FAILURE
, DID_ERROR
, 0, 1, "software failure" },
115 { IBMVFC_VIOS_FAILURE
, IBMVFC_INVALID_PARAMETER
, DID_ERROR
, 0, 1, "invalid parameter" },
116 { IBMVFC_VIOS_FAILURE
, IBMVFC_MISSING_PARAMETER
, DID_ERROR
, 0, 1, "missing parameter" },
117 { IBMVFC_VIOS_FAILURE
, IBMVFC_HOST_IO_BUS
, DID_ERROR
, 1, 1, "host I/O bus failure" },
118 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED
, DID_ERROR
, 0, 1, "transaction cancelled" },
119 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED_IMPLICIT
, DID_ERROR
, 0, 1, "transaction cancelled implicit" },
120 { IBMVFC_VIOS_FAILURE
, IBMVFC_INSUFFICIENT_RESOURCE
, DID_REQUEUE
, 1, 1, "insufficient resources" },
121 { IBMVFC_VIOS_FAILURE
, IBMVFC_PLOGI_REQUIRED
, DID_ERROR
, 0, 1, "port login required" },
122 { IBMVFC_VIOS_FAILURE
, IBMVFC_COMMAND_FAILED
, DID_ERROR
, 1, 1, "command failed" },
124 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_ELS_CMD_CODE
, DID_ERROR
, 0, 1, "invalid ELS command code" },
125 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_VERSION
, DID_ERROR
, 0, 1, "invalid version level" },
126 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_ERROR
, DID_ERROR
, 1, 1, "logical error" },
127 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_CT_IU_SIZE
, DID_ERROR
, 0, 1, "invalid CT_IU size" },
128 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_BUSY
, DID_REQUEUE
, 1, 0, "logical busy" },
129 { IBMVFC_FC_FAILURE
, IBMVFC_PROTOCOL_ERROR
, DID_ERROR
, 1, 1, "protocol error" },
130 { IBMVFC_FC_FAILURE
, IBMVFC_UNABLE_TO_PERFORM_REQ
, DID_ERROR
, 1, 1, "unable to perform request" },
131 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_NOT_SUPPORTED
, DID_ERROR
, 0, 0, "command not supported" },
132 { IBMVFC_FC_FAILURE
, IBMVFC_SERVER_NOT_AVAIL
, DID_ERROR
, 0, 1, "server not available" },
133 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_IN_PROGRESS
, DID_ERROR
, 0, 1, "command already in progress" },
134 { IBMVFC_FC_FAILURE
, IBMVFC_VENDOR_SPECIFIC
, DID_ERROR
, 1, 1, "vendor specific" },
136 { IBMVFC_FC_SCSI_ERROR
, 0, DID_OK
, 1, 0, "SCSI error" },
139 static void ibmvfc_npiv_login(struct ibmvfc_host
*);
140 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*);
141 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*);
142 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*);
143 static void ibmvfc_npiv_logout(struct ibmvfc_host
*);
145 static const char *unknown_error
= "unknown error";
147 #ifdef CONFIG_SCSI_IBMVFC_TRACE
149 * ibmvfc_trc_start - Log a start trace entry
150 * @evt: ibmvfc event struct
153 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
155 struct ibmvfc_host
*vhost
= evt
->vhost
;
156 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
157 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
158 struct ibmvfc_trace_entry
*entry
;
160 entry
= &vhost
->trace
[vhost
->trace_index
++];
162 entry
->time
= jiffies
;
163 entry
->fmt
= evt
->crq
.format
;
164 entry
->type
= IBMVFC_TRC_START
;
166 switch (entry
->fmt
) {
167 case IBMVFC_CMD_FORMAT
:
168 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
169 entry
->scsi_id
= be64_to_cpu(vfc_cmd
->tgt_scsi_id
);
170 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
171 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
172 entry
->u
.start
.xfer_len
= be32_to_cpu(vfc_cmd
->iu
.xfer_len
);
174 case IBMVFC_MAD_FORMAT
:
175 entry
->op_code
= be32_to_cpu(mad
->opcode
);
183 * ibmvfc_trc_end - Log an end trace entry
184 * @evt: ibmvfc event struct
187 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
189 struct ibmvfc_host
*vhost
= evt
->vhost
;
190 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
191 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
192 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
195 entry
->time
= jiffies
;
196 entry
->fmt
= evt
->crq
.format
;
197 entry
->type
= IBMVFC_TRC_END
;
199 switch (entry
->fmt
) {
200 case IBMVFC_CMD_FORMAT
:
201 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
202 entry
->scsi_id
= be64_to_cpu(vfc_cmd
->tgt_scsi_id
);
203 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
204 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
205 entry
->u
.end
.status
= be16_to_cpu(vfc_cmd
->status
);
206 entry
->u
.end
.error
= be16_to_cpu(vfc_cmd
->error
);
207 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
208 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
209 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
211 case IBMVFC_MAD_FORMAT
:
212 entry
->op_code
= be32_to_cpu(mad
->opcode
);
213 entry
->u
.end
.status
= be16_to_cpu(mad
->status
);
222 #define ibmvfc_trc_start(evt) do { } while (0)
223 #define ibmvfc_trc_end(evt) do { } while (0)
227 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
228 * @status: status / error class
232 * index into cmd_status / -EINVAL on failure
234 static int ibmvfc_get_err_index(u16 status
, u16 error
)
238 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
239 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
240 cmd_status
[i
].error
== error
)
247 * ibmvfc_get_cmd_error - Find the error description for the fcp response
248 * @status: status / error class
252 * error description string
254 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
256 int rc
= ibmvfc_get_err_index(status
, error
);
258 return cmd_status
[rc
].name
;
259 return unknown_error
;
263 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
264 * @vfc_cmd: ibmvfc command struct
267 * SCSI result value to return for completed command
269 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
272 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
273 int fc_rsp_len
= be32_to_cpu(rsp
->fcp_rsp_len
);
275 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
276 ((fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
277 rsp
->data
.info
.rsp_code
))
278 return DID_ERROR
<< 16;
280 err
= ibmvfc_get_err_index(be16_to_cpu(vfc_cmd
->status
), be16_to_cpu(vfc_cmd
->error
));
282 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
283 return rsp
->scsi_status
| (DID_ERROR
<< 16);
287 * ibmvfc_retry_cmd - Determine if error status is retryable
288 * @status: status / error class
292 * 1 if error should be retried / 0 if it should not
294 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
296 int rc
= ibmvfc_get_err_index(status
, error
);
299 return cmd_status
[rc
].retry
;
303 static const char *unknown_fc_explain
= "unknown fc explain";
305 static const struct {
309 { 0x00, "no additional explanation" },
310 { 0x01, "service parameter error - options" },
311 { 0x03, "service parameter error - initiator control" },
312 { 0x05, "service parameter error - recipient control" },
313 { 0x07, "service parameter error - received data field size" },
314 { 0x09, "service parameter error - concurrent seq" },
315 { 0x0B, "service parameter error - credit" },
316 { 0x0D, "invalid N_Port/F_Port_Name" },
317 { 0x0E, "invalid node/Fabric Name" },
318 { 0x0F, "invalid common service parameters" },
319 { 0x11, "invalid association header" },
320 { 0x13, "association header required" },
321 { 0x15, "invalid originator S_ID" },
322 { 0x17, "invalid OX_ID-RX-ID combination" },
323 { 0x19, "command (request) already in progress" },
324 { 0x1E, "N_Port Login requested" },
325 { 0x1F, "Invalid N_Port_ID" },
328 static const struct {
332 { 0x00, "no additional explanation" },
333 { 0x01, "port identifier not registered" },
334 { 0x02, "port name not registered" },
335 { 0x03, "node name not registered" },
336 { 0x04, "class of service not registered" },
337 { 0x06, "initial process associator not registered" },
338 { 0x07, "FC-4 TYPEs not registered" },
339 { 0x08, "symbolic port name not registered" },
340 { 0x09, "symbolic node name not registered" },
341 { 0x0A, "port type not registered" },
342 { 0xF0, "authorization exception" },
343 { 0xF1, "authentication exception" },
344 { 0xF2, "data base full" },
345 { 0xF3, "data base empty" },
346 { 0xF4, "processing request" },
347 { 0xF5, "unable to verify connection" },
348 { 0xF6, "devices not in a common zone" },
352 * ibmvfc_get_ls_explain - Return the FC Explain description text
353 * @status: FC Explain status
358 static const char *ibmvfc_get_ls_explain(u16 status
)
362 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
363 if (ls_explain
[i
].fc_explain
== status
)
364 return ls_explain
[i
].name
;
366 return unknown_fc_explain
;
370 * ibmvfc_get_gs_explain - Return the FC Explain description text
371 * @status: FC Explain status
376 static const char *ibmvfc_get_gs_explain(u16 status
)
380 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
381 if (gs_explain
[i
].fc_explain
== status
)
382 return gs_explain
[i
].name
;
384 return unknown_fc_explain
;
387 static const struct {
388 enum ibmvfc_fc_type fc_type
;
391 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
392 { IBMVFC_PORT_REJECT
, "port reject" },
393 { IBMVFC_LS_REJECT
, "ELS reject" },
394 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
395 { IBMVFC_PORT_BUSY
, "port busy" },
396 { IBMVFC_BASIC_REJECT
, "basic reject" },
399 static const char *unknown_fc_type
= "unknown fc type";
402 * ibmvfc_get_fc_type - Return the FC Type description text
403 * @status: FC Type error status
408 static const char *ibmvfc_get_fc_type(u16 status
)
412 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
413 if (fc_type
[i
].fc_type
== status
)
414 return fc_type
[i
].name
;
416 return unknown_fc_type
;
420 * ibmvfc_set_tgt_action - Set the next init action for the target
421 * @tgt: ibmvfc target struct
422 * @action: action to perform
425 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
426 enum ibmvfc_target_action action
)
428 switch (tgt
->action
) {
429 case IBMVFC_TGT_ACTION_DEL_RPORT
:
430 if (action
== IBMVFC_TGT_ACTION_DELETED_RPORT
)
431 tgt
->action
= action
;
432 case IBMVFC_TGT_ACTION_DELETED_RPORT
:
435 if (action
== IBMVFC_TGT_ACTION_DEL_RPORT
)
437 tgt
->action
= action
;
443 * ibmvfc_set_host_state - Set the state for the host
444 * @vhost: ibmvfc host struct
445 * @state: state to set host to
448 * 0 if state changed / non-zero if not changed
450 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
451 enum ibmvfc_host_state state
)
455 switch (vhost
->state
) {
456 case IBMVFC_HOST_OFFLINE
:
460 vhost
->state
= state
;
468 * ibmvfc_set_host_action - Set the next init action for the host
469 * @vhost: ibmvfc host struct
470 * @action: action to perform
473 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
474 enum ibmvfc_host_action action
)
477 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
478 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
479 vhost
->action
= action
;
481 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
482 if (vhost
->action
== IBMVFC_HOST_ACTION_LOGO
)
483 vhost
->action
= action
;
485 case IBMVFC_HOST_ACTION_INIT_WAIT
:
486 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
487 vhost
->action
= action
;
489 case IBMVFC_HOST_ACTION_QUERY
:
490 switch (vhost
->action
) {
491 case IBMVFC_HOST_ACTION_INIT_WAIT
:
492 case IBMVFC_HOST_ACTION_NONE
:
493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
494 vhost
->action
= action
;
500 case IBMVFC_HOST_ACTION_TGT_INIT
:
501 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
502 vhost
->action
= action
;
504 case IBMVFC_HOST_ACTION_INIT
:
505 case IBMVFC_HOST_ACTION_TGT_DEL
:
506 switch (vhost
->action
) {
507 case IBMVFC_HOST_ACTION_RESET
:
508 case IBMVFC_HOST_ACTION_REENABLE
:
511 vhost
->action
= action
;
515 case IBMVFC_HOST_ACTION_LOGO
:
516 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
517 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
518 case IBMVFC_HOST_ACTION_NONE
:
519 case IBMVFC_HOST_ACTION_RESET
:
520 case IBMVFC_HOST_ACTION_REENABLE
:
522 vhost
->action
= action
;
528 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
529 * @vhost: ibmvfc host struct
534 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
536 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
537 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
538 scsi_block_requests(vhost
->host
);
539 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
544 wake_up(&vhost
->work_wait_q
);
548 * ibmvfc_link_down - Handle a link down event from the adapter
549 * @vhost: ibmvfc host struct
550 * @state: ibmvfc host state to enter
553 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
554 enum ibmvfc_host_state state
)
556 struct ibmvfc_target
*tgt
;
559 scsi_block_requests(vhost
->host
);
560 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
561 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
562 ibmvfc_set_host_state(vhost
, state
);
563 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
564 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
565 wake_up(&vhost
->work_wait_q
);
570 * ibmvfc_init_host - Start host initialization
571 * @vhost: ibmvfc host struct
576 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
)
578 struct ibmvfc_target
*tgt
;
580 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
581 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
583 "Host initialization retries exceeded. Taking adapter offline\n");
584 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
589 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
590 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
591 vhost
->async_crq
.cur
= 0;
593 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
594 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
595 scsi_block_requests(vhost
->host
);
596 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
597 vhost
->job_step
= ibmvfc_npiv_login
;
598 wake_up(&vhost
->work_wait_q
);
603 * ibmvfc_send_crq - Send a CRQ
604 * @vhost: ibmvfc host struct
605 * @word1: the first 64 bits of the data
606 * @word2: the second 64 bits of the data
609 * 0 on success / other on failure
611 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
613 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
614 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
618 * ibmvfc_send_crq_init - Send a CRQ init message
619 * @vhost: ibmvfc host struct
622 * 0 on success / other on failure
624 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
626 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
627 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
631 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
632 * @vhost: ibmvfc host struct
635 * 0 on success / other on failure
637 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
639 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
640 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
644 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
645 * @vhost: ibmvfc host struct
647 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
648 * the crq with the hypervisor.
650 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
653 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
654 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
656 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
657 free_irq(vdev
->irq
, vhost
);
658 tasklet_kill(&vhost
->tasklet
);
662 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
663 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
665 vhost
->state
= IBMVFC_NO_CRQ
;
666 vhost
->logged_in
= 0;
667 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
668 free_page((unsigned long)crq
->msgs
);
672 * ibmvfc_reenable_crq_queue - reenables the CRQ
673 * @vhost: ibmvfc host struct
676 * 0 on success / other on failure
678 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
681 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
683 /* Re-enable the CRQ */
687 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
688 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
691 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
697 * ibmvfc_reset_crq - resets a crq after a failure
698 * @vhost: ibmvfc host struct
701 * 0 on success / other on failure
703 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
707 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
708 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
714 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
715 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
717 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
718 vhost
->state
= IBMVFC_NO_CRQ
;
719 vhost
->logged_in
= 0;
720 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
722 /* Clean out the queue */
723 memset(crq
->msgs
, 0, PAGE_SIZE
);
726 /* And re-open it again */
727 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
728 crq
->msg_token
, PAGE_SIZE
);
731 /* Adapter is good, but other end is not ready */
732 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
734 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
735 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
741 * ibmvfc_valid_event - Determines if event is valid.
742 * @pool: event_pool that contains the event
743 * @evt: ibmvfc event to be checked for validity
746 * 1 if event is valid / 0 if event is not valid
748 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
749 struct ibmvfc_event
*evt
)
751 int index
= evt
- pool
->events
;
752 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
754 if (evt
!= pool
->events
+ index
) /* unaligned */
760 * ibmvfc_free_event - Free the specified event
761 * @evt: ibmvfc_event to be freed
764 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
766 struct ibmvfc_host
*vhost
= evt
->vhost
;
767 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
769 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
770 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
771 list_add_tail(&evt
->queue
, &vhost
->free
);
775 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
776 * @evt: ibmvfc event struct
778 * This function does not setup any error status, that must be done
779 * before this function gets called.
781 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
783 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
786 scsi_dma_unmap(cmnd
);
787 cmnd
->scsi_done(cmnd
);
791 complete(evt
->eh_comp
);
793 ibmvfc_free_event(evt
);
797 * ibmvfc_fail_request - Fail request with specified error code
798 * @evt: ibmvfc event struct
799 * @error_code: error code to fail request with
804 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
807 evt
->cmnd
->result
= (error_code
<< 16);
808 evt
->done
= ibmvfc_scsi_eh_done
;
810 evt
->xfer_iu
->mad_common
.status
= cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED
);
812 list_del(&evt
->queue
);
813 del_timer(&evt
->timer
);
819 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
820 * @vhost: ibmvfc host struct
821 * @error_code: error code to fail requests with
826 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
828 struct ibmvfc_event
*evt
, *pos
;
830 ibmvfc_dbg(vhost
, "Purging all requests\n");
831 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
832 ibmvfc_fail_request(evt
, error_code
);
836 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
837 * @vhost: struct ibmvfc host to reset
839 static void ibmvfc_hard_reset_host(struct ibmvfc_host
*vhost
)
841 ibmvfc_purge_requests(vhost
, DID_ERROR
);
842 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
843 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_RESET
);
847 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
848 * @vhost: struct ibmvfc host to reset
850 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
852 if (vhost
->logged_in
&& vhost
->action
!= IBMVFC_HOST_ACTION_LOGO_WAIT
&&
853 !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
854 scsi_block_requests(vhost
->host
);
855 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO
);
856 vhost
->job_step
= ibmvfc_npiv_logout
;
857 wake_up(&vhost
->work_wait_q
);
859 ibmvfc_hard_reset_host(vhost
);
863 * ibmvfc_reset_host - Reset the connection to the server
864 * @vhost: ibmvfc host struct
866 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
870 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
871 __ibmvfc_reset_host(vhost
);
872 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
876 * ibmvfc_retry_host_init - Retry host initialization if allowed
877 * @vhost: ibmvfc host struct
879 * Returns: 1 if init will be retried / 0 if not
882 static int ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
886 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
887 vhost
->delay_init
= 1;
888 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
890 "Host initialization retries exceeded. Taking adapter offline\n");
891 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
892 } else if (vhost
->init_retries
== IBMVFC_MAX_HOST_INIT_RETRIES
)
893 __ibmvfc_reset_host(vhost
);
895 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
900 wake_up(&vhost
->work_wait_q
);
905 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
906 * @starget: scsi target struct
909 * ibmvfc_target struct / NULL if not found
911 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
913 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
914 struct ibmvfc_host
*vhost
= shost_priv(shost
);
915 struct ibmvfc_target
*tgt
;
917 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
918 if (tgt
->target_id
== starget
->id
) {
919 kref_get(&tgt
->kref
);
926 * ibmvfc_get_target - Find the specified scsi_target
927 * @starget: scsi target struct
930 * ibmvfc_target struct / NULL if not found
932 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
934 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
935 struct ibmvfc_target
*tgt
;
938 spin_lock_irqsave(shost
->host_lock
, flags
);
939 tgt
= __ibmvfc_get_target(starget
);
940 spin_unlock_irqrestore(shost
->host_lock
, flags
);
945 * ibmvfc_get_host_speed - Get host port speed
946 * @shost: scsi host struct
951 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
953 struct ibmvfc_host
*vhost
= shost_priv(shost
);
956 spin_lock_irqsave(shost
->host_lock
, flags
);
957 if (vhost
->state
== IBMVFC_ACTIVE
) {
958 switch (be64_to_cpu(vhost
->login_buf
->resp
.link_speed
) / 100) {
960 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
963 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
966 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
969 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
972 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
975 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
978 ibmvfc_log(vhost
, 3, "Unknown port speed: %lld Gbit\n",
979 be64_to_cpu(vhost
->login_buf
->resp
.link_speed
) / 100);
980 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
984 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
985 spin_unlock_irqrestore(shost
->host_lock
, flags
);
989 * ibmvfc_get_host_port_state - Get host port state
990 * @shost: scsi host struct
995 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
997 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1000 spin_lock_irqsave(shost
->host_lock
, flags
);
1001 switch (vhost
->state
) {
1002 case IBMVFC_INITIALIZING
:
1004 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
1006 case IBMVFC_LINK_DOWN
:
1007 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
1009 case IBMVFC_LINK_DEAD
:
1010 case IBMVFC_HOST_OFFLINE
:
1011 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
1014 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
1017 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1020 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
1021 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1024 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1028 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1029 * @rport: rport struct
1030 * @timeout: timeout value
1035 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
1038 rport
->dev_loss_tmo
= timeout
;
1040 rport
->dev_loss_tmo
= 1;
1044 * ibmvfc_release_tgt - Free memory allocated for a target
1045 * @kref: kref struct
1048 static void ibmvfc_release_tgt(struct kref
*kref
)
1050 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1055 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1056 * @starget: scsi target struct
1061 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1063 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1064 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1066 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1070 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1071 * @starget: scsi target struct
1076 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1078 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1079 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1081 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1085 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1086 * @starget: scsi target struct
1091 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1093 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1094 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1096 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1100 * ibmvfc_wait_while_resetting - Wait while the host resets
1101 * @vhost: ibmvfc host struct
1104 * 0 on success / other on failure
1106 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1108 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1109 ((vhost
->state
== IBMVFC_ACTIVE
||
1110 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1111 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1112 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1113 (init_timeout
* HZ
));
1115 return timeout
? 0 : -EIO
;
1119 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1120 * @shost: scsi host struct
1123 * 0 on success / other on failure
1125 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1127 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1129 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1130 ibmvfc_reset_host(vhost
);
1131 return ibmvfc_wait_while_resetting(vhost
);
1135 * ibmvfc_gather_partition_info - Gather info about the LPAR
1140 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1142 struct device_node
*rootdn
;
1144 const unsigned int *num
;
1146 rootdn
= of_find_node_by_path("/");
1150 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1152 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1153 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1155 vhost
->partition_number
= *num
;
1156 of_node_put(rootdn
);
1160 * ibmvfc_set_login_info - Setup info for NPIV login
1161 * @vhost: ibmvfc host struct
1166 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1168 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1169 struct device_node
*of_node
= vhost
->dev
->of_node
;
1170 const char *location
;
1172 memset(login_info
, 0, sizeof(*login_info
));
1174 login_info
->ostype
= cpu_to_be32(IBMVFC_OS_LINUX
);
1175 login_info
->max_dma_len
= cpu_to_be64(IBMVFC_MAX_SECTORS
<< 9);
1176 login_info
->max_payload
= cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu
));
1177 login_info
->max_response
= cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp
));
1178 login_info
->partition_num
= cpu_to_be32(vhost
->partition_number
);
1179 login_info
->vfc_frame_version
= cpu_to_be32(1);
1180 login_info
->fcp_version
= cpu_to_be16(3);
1181 login_info
->flags
= cpu_to_be16(IBMVFC_FLUSH_ON_HALT
);
1182 if (vhost
->client_migrated
)
1183 login_info
->flags
|= cpu_to_be16(IBMVFC_CLIENT_MIGRATED
);
1185 login_info
->max_cmds
= cpu_to_be32(max_requests
+ IBMVFC_NUM_INTERNAL_REQ
);
1186 login_info
->capabilities
= cpu_to_be64(IBMVFC_CAN_MIGRATE
);
1187 login_info
->async
.va
= cpu_to_be64(vhost
->async_crq
.msg_token
);
1188 login_info
->async
.len
= cpu_to_be32(vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
));
1189 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1190 strncpy(login_info
->device_name
,
1191 dev_name(&vhost
->host
->shost_gendev
), IBMVFC_MAX_NAME
);
1193 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1194 location
= location
? location
: dev_name(vhost
->dev
);
1195 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1199 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1200 * @vhost: ibmvfc host who owns the event pool
1202 * Returns zero on success.
1204 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1207 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1210 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1211 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1215 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1216 pool
->size
* sizeof(*pool
->iu_storage
),
1217 &pool
->iu_token
, 0);
1219 if (!pool
->iu_storage
) {
1220 kfree(pool
->events
);
1224 for (i
= 0; i
< pool
->size
; ++i
) {
1225 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1226 atomic_set(&evt
->free
, 1);
1227 evt
->crq
.valid
= 0x80;
1228 evt
->crq
.ioba
= cpu_to_be64(pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
));
1229 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1231 evt
->ext_list
= NULL
;
1232 list_add_tail(&evt
->queue
, &vhost
->free
);
1240 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1241 * @vhost: ibmvfc host who owns the event pool
1244 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1247 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1250 for (i
= 0; i
< pool
->size
; ++i
) {
1251 list_del(&pool
->events
[i
].queue
);
1252 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1253 if (pool
->events
[i
].ext_list
)
1254 dma_pool_free(vhost
->sg_pool
,
1255 pool
->events
[i
].ext_list
,
1256 pool
->events
[i
].ext_list_token
);
1259 kfree(pool
->events
);
1260 dma_free_coherent(vhost
->dev
,
1261 pool
->size
* sizeof(*pool
->iu_storage
),
1262 pool
->iu_storage
, pool
->iu_token
);
1267 * ibmvfc_get_event - Gets the next free event in pool
1268 * @vhost: ibmvfc host struct
1270 * Returns a free event from the pool.
1272 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1274 struct ibmvfc_event
*evt
;
1276 BUG_ON(list_empty(&vhost
->free
));
1277 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1278 atomic_set(&evt
->free
, 0);
1279 list_del(&evt
->queue
);
1284 * ibmvfc_init_event - Initialize fields in an event struct that are always
1287 * @done: Routine to call when the event is responded to
1288 * @format: SRP or MAD format
1290 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1291 void (*done
) (struct ibmvfc_event
*), u8 format
)
1294 evt
->sync_iu
= NULL
;
1295 evt
->crq
.format
= format
;
1297 evt
->eh_comp
= NULL
;
1301 * ibmvfc_map_sg_list - Initialize scatterlist
1302 * @scmd: scsi command struct
1303 * @nseg: number of scatterlist segments
1304 * @md: memory descriptor list to initialize
1306 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1307 struct srp_direct_buf
*md
)
1310 struct scatterlist
*sg
;
1312 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1313 md
[i
].va
= cpu_to_be64(sg_dma_address(sg
));
1314 md
[i
].len
= cpu_to_be32(sg_dma_len(sg
));
1320 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1321 * @scmd: Scsi_Cmnd with the scatterlist
1322 * @evt: ibmvfc event struct
1323 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1324 * @dev: device for which to map dma memory
1327 * 0 on success / non-zero on failure
1329 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1330 struct ibmvfc_event
*evt
,
1331 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1335 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1336 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1338 sg_mapped
= scsi_dma_map(scmd
);
1340 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_NO_MEM_DESC
);
1342 } else if (unlikely(sg_mapped
< 0)) {
1343 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1344 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1348 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1349 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_WRITE
);
1350 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1352 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_READ
);
1353 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1356 if (sg_mapped
== 1) {
1357 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1361 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_SCATTERLIST
);
1363 if (!evt
->ext_list
) {
1364 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1365 &evt
->ext_list_token
);
1367 if (!evt
->ext_list
) {
1368 scsi_dma_unmap(scmd
);
1369 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1370 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1375 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1377 data
->va
= cpu_to_be64(evt
->ext_list_token
);
1378 data
->len
= cpu_to_be32(sg_mapped
* sizeof(struct srp_direct_buf
));
1384 * ibmvfc_timeout - Internal command timeout handler
1385 * @evt: struct ibmvfc_event that timed out
1387 * Called when an internally generated command times out
1389 static void ibmvfc_timeout(struct ibmvfc_event
*evt
)
1391 struct ibmvfc_host
*vhost
= evt
->vhost
;
1392 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1393 ibmvfc_reset_host(vhost
);
1397 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1398 * @evt: event to be sent
1399 * @vhost: ibmvfc host struct
1400 * @timeout: timeout in seconds - 0 means do not time command
1402 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1404 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1405 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1407 __be64
*crq_as_u64
= (__be64
*) &evt
->crq
;
1410 /* Copy the IU into the transfer area */
1411 *evt
->xfer_iu
= evt
->iu
;
1412 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1413 evt
->xfer_iu
->cmd
.tag
= cpu_to_be64((u64
)evt
);
1414 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1415 evt
->xfer_iu
->mad_common
.tag
= cpu_to_be64((u64
)evt
);
1419 list_add_tail(&evt
->queue
, &vhost
->sent
);
1420 init_timer(&evt
->timer
);
1423 evt
->timer
.data
= (unsigned long) evt
;
1424 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1425 evt
->timer
.function
= (void (*)(unsigned long))ibmvfc_timeout
;
1426 add_timer(&evt
->timer
);
1431 if ((rc
= ibmvfc_send_crq(vhost
, be64_to_cpu(crq_as_u64
[0]),
1432 be64_to_cpu(crq_as_u64
[1])))) {
1433 list_del(&evt
->queue
);
1434 del_timer(&evt
->timer
);
1436 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1437 * Firmware will send a CRQ with a transport event (0xFF) to
1438 * tell this client what has happened to the transport. This
1439 * will be handled in ibmvfc_handle_crq()
1441 if (rc
== H_CLOSED
) {
1442 if (printk_ratelimit())
1443 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1445 scsi_dma_unmap(evt
->cmnd
);
1446 ibmvfc_free_event(evt
);
1447 return SCSI_MLQUEUE_HOST_BUSY
;
1450 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1452 evt
->cmnd
->result
= DID_ERROR
<< 16;
1453 evt
->done
= ibmvfc_scsi_eh_done
;
1455 evt
->xfer_iu
->mad_common
.status
= cpu_to_be16(IBMVFC_MAD_CRQ_ERROR
);
1459 ibmvfc_trc_start(evt
);
1465 * ibmvfc_log_error - Log an error for the failed command if appropriate
1466 * @evt: ibmvfc event to log
1469 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1471 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1472 struct ibmvfc_host
*vhost
= evt
->vhost
;
1473 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1474 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1475 const char *err
= unknown_error
;
1476 int index
= ibmvfc_get_err_index(be16_to_cpu(vfc_cmd
->status
), be16_to_cpu(vfc_cmd
->error
));
1481 logerr
= cmd_status
[index
].log
;
1482 err
= cmd_status
[index
].name
;
1485 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1488 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1489 rsp_code
= rsp
->data
.info
.rsp_code
;
1491 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1492 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1493 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1494 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1498 * ibmvfc_relogin - Log back into the specified device
1499 * @sdev: scsi device struct
1502 static void ibmvfc_relogin(struct scsi_device
*sdev
)
1504 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1505 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1506 struct ibmvfc_target
*tgt
;
1508 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1509 if (rport
== tgt
->rport
) {
1510 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
1515 ibmvfc_reinit_host(vhost
);
1519 * ibmvfc_scsi_done - Handle responses from commands
1520 * @evt: ibmvfc event to be handled
1522 * Used as a callback when sending scsi cmds.
1524 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1526 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1527 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1528 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1530 u32 sense_len
= be32_to_cpu(rsp
->fcp_sense_len
);
1533 if (be16_to_cpu(vfc_cmd
->response_flags
) & IBMVFC_ADAPTER_RESID_VALID
)
1534 scsi_set_resid(cmnd
, be32_to_cpu(vfc_cmd
->adapter_resid
));
1535 else if (rsp
->flags
& FCP_RESID_UNDER
)
1536 scsi_set_resid(cmnd
, be32_to_cpu(rsp
->fcp_resid
));
1538 scsi_set_resid(cmnd
, 0);
1540 if (vfc_cmd
->status
) {
1541 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1543 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1544 rsp_len
= be32_to_cpu(rsp
->fcp_rsp_len
);
1545 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1546 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1547 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1548 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1549 if ((be16_to_cpu(vfc_cmd
->status
) & IBMVFC_VIOS_FAILURE
) &&
1550 (be16_to_cpu(vfc_cmd
->error
) == IBMVFC_PLOGI_REQUIRED
))
1551 ibmvfc_relogin(cmnd
->device
);
1553 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1554 cmnd
->result
= (DID_ERROR
<< 16);
1556 ibmvfc_log_error(evt
);
1559 if (!cmnd
->result
&&
1560 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1561 cmnd
->result
= (DID_ERROR
<< 16);
1563 scsi_dma_unmap(cmnd
);
1564 cmnd
->scsi_done(cmnd
);
1568 complete(evt
->eh_comp
);
1570 ibmvfc_free_event(evt
);
1574 * ibmvfc_host_chkready - Check if the host can accept commands
1575 * @vhost: struct ibmvfc host
1578 * 1 if host can accept command / 0 if not
1580 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1584 switch (vhost
->state
) {
1585 case IBMVFC_LINK_DEAD
:
1586 case IBMVFC_HOST_OFFLINE
:
1587 result
= DID_NO_CONNECT
<< 16;
1590 case IBMVFC_INITIALIZING
:
1592 case IBMVFC_LINK_DOWN
:
1593 result
= DID_REQUEUE
<< 16;
1604 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1605 * @cmnd: struct scsi_cmnd to be executed
1606 * @done: Callback function to be called when cmnd is completed
1609 * 0 on success / other on failure
1611 static int ibmvfc_queuecommand_lck(struct scsi_cmnd
*cmnd
,
1612 void (*done
) (struct scsi_cmnd
*))
1614 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1615 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1616 struct ibmvfc_cmd
*vfc_cmd
;
1617 struct ibmvfc_event
*evt
;
1621 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1622 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1628 cmnd
->result
= (DID_OK
<< 16);
1629 evt
= ibmvfc_get_event(vhost
);
1630 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1632 cmnd
->scsi_done
= done
;
1633 vfc_cmd
= &evt
->iu
.cmd
;
1634 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1635 vfc_cmd
->resp
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) + offsetof(struct ibmvfc_cmd
, rsp
));
1636 vfc_cmd
->resp
.len
= cpu_to_be32(sizeof(vfc_cmd
->rsp
));
1637 vfc_cmd
->frame_type
= cpu_to_be32(IBMVFC_SCSI_FCP_TYPE
);
1638 vfc_cmd
->payload_len
= cpu_to_be32(sizeof(vfc_cmd
->iu
));
1639 vfc_cmd
->resp_len
= cpu_to_be32(sizeof(vfc_cmd
->rsp
));
1640 vfc_cmd
->cancel_key
= cpu_to_be32((unsigned long)cmnd
->device
->hostdata
);
1641 vfc_cmd
->tgt_scsi_id
= cpu_to_be64(rport
->port_id
);
1642 vfc_cmd
->iu
.xfer_len
= cpu_to_be32(scsi_bufflen(cmnd
));
1643 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1644 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1646 if (cmnd
->flags
& SCMD_TAGGED
) {
1647 vfc_cmd
->task_tag
= cpu_to_be64(cmnd
->tag
);
1648 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1651 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1652 return ibmvfc_send_event(evt
, vhost
, 0);
1654 ibmvfc_free_event(evt
);
1656 return SCSI_MLQUEUE_HOST_BUSY
;
1658 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1659 scmd_printk(KERN_ERR
, cmnd
,
1660 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1662 cmnd
->result
= DID_ERROR
<< 16;
1667 static DEF_SCSI_QCMD(ibmvfc_queuecommand
)
1670 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1671 * @evt: ibmvfc event struct
1674 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1676 /* copy the response back */
1678 *evt
->sync_iu
= *evt
->xfer_iu
;
1680 complete(&evt
->comp
);
1684 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1685 * @evt: struct ibmvfc_event
1688 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event
*evt
)
1690 struct ibmvfc_host
*vhost
= evt
->vhost
;
1692 ibmvfc_free_event(evt
);
1693 vhost
->aborting_passthru
= 0;
1694 dev_info(vhost
->dev
, "Passthru command cancelled\n");
1698 * ibmvfc_bsg_timeout - Handle a BSG timeout
1699 * @job: struct fc_bsg_job that timed out
1702 * 0 on success / other on failure
1704 static int ibmvfc_bsg_timeout(struct fc_bsg_job
*job
)
1706 struct ibmvfc_host
*vhost
= shost_priv(job
->shost
);
1707 unsigned long port_id
= (unsigned long)job
->dd_data
;
1708 struct ibmvfc_event
*evt
;
1709 struct ibmvfc_tmf
*tmf
;
1710 unsigned long flags
;
1714 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1715 if (vhost
->aborting_passthru
|| vhost
->state
!= IBMVFC_ACTIVE
) {
1716 __ibmvfc_reset_host(vhost
);
1717 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1721 vhost
->aborting_passthru
= 1;
1722 evt
= ibmvfc_get_event(vhost
);
1723 ibmvfc_init_event(evt
, ibmvfc_bsg_timeout_done
, IBMVFC_MAD_FORMAT
);
1726 memset(tmf
, 0, sizeof(*tmf
));
1727 tmf
->common
.version
= cpu_to_be32(1);
1728 tmf
->common
.opcode
= cpu_to_be32(IBMVFC_TMF_MAD
);
1729 tmf
->common
.length
= cpu_to_be16(sizeof(*tmf
));
1730 tmf
->scsi_id
= cpu_to_be64(port_id
);
1731 tmf
->cancel_key
= cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY
);
1732 tmf
->my_cancel_key
= cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY
);
1733 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1736 vhost
->aborting_passthru
= 0;
1737 dev_err(vhost
->dev
, "Failed to send cancel event. rc=%d\n", rc
);
1740 dev_info(vhost
->dev
, "Cancelling passthru command to port id 0x%lx\n",
1743 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1750 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1751 * @vhost: struct ibmvfc_host to send command
1752 * @port_id: port ID to send command
1755 * 0 on success / other on failure
1757 static int ibmvfc_bsg_plogi(struct ibmvfc_host
*vhost
, unsigned int port_id
)
1759 struct ibmvfc_port_login
*plogi
;
1760 struct ibmvfc_target
*tgt
;
1761 struct ibmvfc_event
*evt
;
1762 union ibmvfc_iu rsp_iu
;
1763 unsigned long flags
;
1764 int rc
= 0, issue_login
= 1;
1767 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1768 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1769 if (tgt
->scsi_id
== port_id
) {
1777 if (unlikely((rc
= ibmvfc_host_chkready(vhost
))))
1780 evt
= ibmvfc_get_event(vhost
);
1781 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1782 plogi
= &evt
->iu
.plogi
;
1783 memset(plogi
, 0, sizeof(*plogi
));
1784 plogi
->common
.version
= cpu_to_be32(1);
1785 plogi
->common
.opcode
= cpu_to_be32(IBMVFC_PORT_LOGIN
);
1786 plogi
->common
.length
= cpu_to_be16(sizeof(*plogi
));
1787 plogi
->scsi_id
= cpu_to_be64(port_id
);
1788 evt
->sync_iu
= &rsp_iu
;
1789 init_completion(&evt
->comp
);
1791 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1792 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1797 wait_for_completion(&evt
->comp
);
1799 if (rsp_iu
.plogi
.common
.status
)
1802 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1803 ibmvfc_free_event(evt
);
1805 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1811 * ibmvfc_bsg_request - Handle a BSG request
1812 * @job: struct fc_bsg_job to be executed
1815 * 0 on success / other on failure
1817 static int ibmvfc_bsg_request(struct fc_bsg_job
*job
)
1819 struct ibmvfc_host
*vhost
= shost_priv(job
->shost
);
1820 struct fc_rport
*rport
= job
->rport
;
1821 struct ibmvfc_passthru_mad
*mad
;
1822 struct ibmvfc_event
*evt
;
1823 union ibmvfc_iu rsp_iu
;
1824 unsigned long flags
, port_id
= -1;
1825 unsigned int code
= job
->request
->msgcode
;
1826 int rc
= 0, req_seg
, rsp_seg
, issue_login
= 0;
1827 u32 fc_flags
, rsp_len
;
1830 job
->reply
->reply_payload_rcv_len
= 0;
1832 port_id
= rport
->port_id
;
1835 case FC_BSG_HST_ELS_NOLOGIN
:
1836 port_id
= (job
->request
->rqst_data
.h_els
.port_id
[0] << 16) |
1837 (job
->request
->rqst_data
.h_els
.port_id
[1] << 8) |
1838 job
->request
->rqst_data
.h_els
.port_id
[2];
1839 case FC_BSG_RPT_ELS
:
1840 fc_flags
= IBMVFC_FC_ELS
;
1844 port_id
= (job
->request
->rqst_data
.h_ct
.port_id
[0] << 16) |
1845 (job
->request
->rqst_data
.h_ct
.port_id
[1] << 8) |
1846 job
->request
->rqst_data
.h_ct
.port_id
[2];
1848 fc_flags
= IBMVFC_FC_CT_IU
;
1856 if (!mutex_trylock(&vhost
->passthru_mutex
))
1859 job
->dd_data
= (void *)port_id
;
1860 req_seg
= dma_map_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1861 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1864 mutex_unlock(&vhost
->passthru_mutex
);
1868 rsp_seg
= dma_map_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1869 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1872 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1873 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1874 mutex_unlock(&vhost
->passthru_mutex
);
1878 if (req_seg
> 1 || rsp_seg
> 1) {
1884 rc
= ibmvfc_bsg_plogi(vhost
, port_id
);
1886 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1888 if (unlikely(rc
|| (rport
&& (rc
= fc_remote_port_chkready(rport
)))) ||
1889 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1890 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1894 evt
= ibmvfc_get_event(vhost
);
1895 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1896 mad
= &evt
->iu
.passthru
;
1898 memset(mad
, 0, sizeof(*mad
));
1899 mad
->common
.version
= cpu_to_be32(1);
1900 mad
->common
.opcode
= cpu_to_be32(IBMVFC_PASSTHRU
);
1901 mad
->common
.length
= cpu_to_be16(sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
));
1903 mad
->cmd_ioba
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) +
1904 offsetof(struct ibmvfc_passthru_mad
, iu
));
1905 mad
->cmd_ioba
.len
= cpu_to_be32(sizeof(mad
->iu
));
1907 mad
->iu
.cmd_len
= cpu_to_be32(job
->request_payload
.payload_len
);
1908 mad
->iu
.rsp_len
= cpu_to_be32(job
->reply_payload
.payload_len
);
1909 mad
->iu
.flags
= cpu_to_be32(fc_flags
);
1910 mad
->iu
.cancel_key
= cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY
);
1912 mad
->iu
.cmd
.va
= cpu_to_be64(sg_dma_address(job
->request_payload
.sg_list
));
1913 mad
->iu
.cmd
.len
= cpu_to_be32(sg_dma_len(job
->request_payload
.sg_list
));
1914 mad
->iu
.rsp
.va
= cpu_to_be64(sg_dma_address(job
->reply_payload
.sg_list
));
1915 mad
->iu
.rsp
.len
= cpu_to_be32(sg_dma_len(job
->reply_payload
.sg_list
));
1916 mad
->iu
.scsi_id
= cpu_to_be64(port_id
);
1917 mad
->iu
.tag
= cpu_to_be64((u64
)evt
);
1918 rsp_len
= be32_to_cpu(mad
->iu
.rsp
.len
);
1920 evt
->sync_iu
= &rsp_iu
;
1921 init_completion(&evt
->comp
);
1922 rc
= ibmvfc_send_event(evt
, vhost
, 0);
1923 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1930 wait_for_completion(&evt
->comp
);
1932 if (rsp_iu
.passthru
.common
.status
)
1935 job
->reply
->reply_payload_rcv_len
= rsp_len
;
1937 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1938 ibmvfc_free_event(evt
);
1939 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1940 job
->reply
->result
= rc
;
1944 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1945 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1946 dma_unmap_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1947 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1948 mutex_unlock(&vhost
->passthru_mutex
);
1954 * ibmvfc_reset_device - Reset the device with the specified reset type
1955 * @sdev: scsi device to reset
1957 * @desc: reset type description for log messages
1960 * 0 on success / other on failure
1962 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1964 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1965 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1966 struct ibmvfc_cmd
*tmf
;
1967 struct ibmvfc_event
*evt
= NULL
;
1968 union ibmvfc_iu rsp_iu
;
1969 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1970 int rsp_rc
= -EBUSY
;
1971 unsigned long flags
;
1974 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1975 if (vhost
->state
== IBMVFC_ACTIVE
) {
1976 evt
= ibmvfc_get_event(vhost
);
1977 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1980 memset(tmf
, 0, sizeof(*tmf
));
1981 tmf
->resp
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) + offsetof(struct ibmvfc_cmd
, rsp
));
1982 tmf
->resp
.len
= cpu_to_be32(sizeof(tmf
->rsp
));
1983 tmf
->frame_type
= cpu_to_be32(IBMVFC_SCSI_FCP_TYPE
);
1984 tmf
->payload_len
= cpu_to_be32(sizeof(tmf
->iu
));
1985 tmf
->resp_len
= cpu_to_be32(sizeof(tmf
->rsp
));
1986 tmf
->cancel_key
= cpu_to_be32((unsigned long)sdev
->hostdata
);
1987 tmf
->tgt_scsi_id
= cpu_to_be64(rport
->port_id
);
1988 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1989 tmf
->flags
= cpu_to_be16((IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
));
1990 tmf
->iu
.tmf_flags
= type
;
1991 evt
->sync_iu
= &rsp_iu
;
1993 init_completion(&evt
->comp
);
1994 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1996 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1999 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
2004 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
2005 wait_for_completion(&evt
->comp
);
2007 if (rsp_iu
.cmd
.status
)
2008 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2011 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2012 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2014 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
2015 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc
,
2016 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu
.cmd
.status
), be16_to_cpu(rsp_iu
.cmd
.error
)),
2017 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2018 fc_rsp
->scsi_status
);
2021 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
2023 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2024 ibmvfc_free_event(evt
);
2025 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2030 * ibmvfc_match_rport - Match function for specified remote port
2031 * @evt: ibmvfc event struct
2032 * @device: device to match (rport)
2035 * 1 if event matches rport / 0 if event does not match rport
2037 static int ibmvfc_match_rport(struct ibmvfc_event
*evt
, void *rport
)
2039 struct fc_rport
*cmd_rport
;
2042 cmd_rport
= starget_to_rport(scsi_target(evt
->cmnd
->device
));
2043 if (cmd_rport
== rport
)
2050 * ibmvfc_match_target - Match function for specified target
2051 * @evt: ibmvfc event struct
2052 * @device: device to match (starget)
2055 * 1 if event matches starget / 0 if event does not match starget
2057 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
2059 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
2065 * ibmvfc_match_lun - Match function for specified LUN
2066 * @evt: ibmvfc event struct
2067 * @device: device to match (sdev)
2070 * 1 if event matches sdev / 0 if event does not match sdev
2072 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
2074 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
2080 * ibmvfc_wait_for_ops - Wait for ops to complete
2081 * @vhost: ibmvfc host struct
2082 * @device: device to match (starget or sdev)
2083 * @match: match function
2088 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
2089 int (*match
) (struct ibmvfc_event
*, void *))
2091 struct ibmvfc_event
*evt
;
2092 DECLARE_COMPLETION_ONSTACK(comp
);
2094 unsigned long flags
;
2095 signed long timeout
= IBMVFC_ABORT_WAIT_TIMEOUT
* HZ
;
2100 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2101 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2102 if (match(evt
, device
)) {
2103 evt
->eh_comp
= &comp
;
2107 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2110 timeout
= wait_for_completion_timeout(&comp
, timeout
);
2114 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2115 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2116 if (match(evt
, device
)) {
2117 evt
->eh_comp
= NULL
;
2121 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2123 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
2125 return wait
? FAILED
: SUCCESS
;
2135 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2136 * @sdev: scsi device to cancel commands
2137 * @type: type of error recovery being performed
2139 * This sends a cancel to the VIOS for the specified device. This does
2140 * NOT send any abort to the actual device. That must be done separately.
2143 * 0 on success / other on failure
2145 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
2147 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2148 struct scsi_target
*starget
= scsi_target(sdev
);
2149 struct fc_rport
*rport
= starget_to_rport(starget
);
2150 struct ibmvfc_tmf
*tmf
;
2151 struct ibmvfc_event
*evt
, *found_evt
;
2152 union ibmvfc_iu rsp
;
2153 int rsp_rc
= -EBUSY
;
2154 unsigned long flags
;
2158 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2160 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2161 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2168 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2169 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
2170 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2174 if (vhost
->logged_in
) {
2175 evt
= ibmvfc_get_event(vhost
);
2176 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
2179 memset(tmf
, 0, sizeof(*tmf
));
2180 tmf
->common
.version
= cpu_to_be32(1);
2181 tmf
->common
.opcode
= cpu_to_be32(IBMVFC_TMF_MAD
);
2182 tmf
->common
.length
= cpu_to_be16(sizeof(*tmf
));
2183 tmf
->scsi_id
= cpu_to_be64(rport
->port_id
);
2184 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
2185 if (!(be64_to_cpu(vhost
->login_buf
->resp
.capabilities
) & IBMVFC_CAN_SUPPRESS_ABTS
))
2186 type
&= ~IBMVFC_TMF_SUPPRESS_ABTS
;
2187 if (vhost
->state
== IBMVFC_ACTIVE
)
2188 tmf
->flags
= cpu_to_be32((type
| IBMVFC_TMF_LUA_VALID
));
2190 tmf
->flags
= cpu_to_be32(((type
& IBMVFC_TMF_SUPPRESS_ABTS
) | IBMVFC_TMF_LUA_VALID
));
2191 tmf
->cancel_key
= cpu_to_be32((unsigned long)sdev
->hostdata
);
2192 tmf
->my_cancel_key
= cpu_to_be32((unsigned long)starget
->hostdata
);
2194 evt
->sync_iu
= &rsp
;
2195 init_completion(&evt
->comp
);
2196 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2199 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2202 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
2203 /* If failure is received, the host adapter is most likely going
2204 through reset, return success so the caller will wait for the command
2205 being cancelled to get returned */
2209 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
2211 wait_for_completion(&evt
->comp
);
2212 status
= be16_to_cpu(rsp
.mad_common
.status
);
2213 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2214 ibmvfc_free_event(evt
);
2215 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2217 if (status
!= IBMVFC_MAD_SUCCESS
) {
2218 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
2220 case IBMVFC_MAD_DRIVER_FAILED
:
2221 case IBMVFC_MAD_CRQ_ERROR
:
2222 /* Host adapter most likely going through reset, return success to
2223 the caller will wait for the command being cancelled to get returned */
2230 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
2235 * ibmvfc_match_key - Match function for specified cancel key
2236 * @evt: ibmvfc event struct
2237 * @key: cancel key to match
2240 * 1 if event matches key / 0 if event does not match key
2242 static int ibmvfc_match_key(struct ibmvfc_event
*evt
, void *key
)
2244 unsigned long cancel_key
= (unsigned long)key
;
2246 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
&&
2247 be32_to_cpu(evt
->iu
.cmd
.cancel_key
) == cancel_key
)
2253 * ibmvfc_match_evt - Match function for specified event
2254 * @evt: ibmvfc event struct
2255 * @match: event to match
2258 * 1 if event matches key / 0 if event does not match key
2260 static int ibmvfc_match_evt(struct ibmvfc_event
*evt
, void *match
)
2268 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2269 * @sdev: scsi device to abort commands
2271 * This sends an Abort Task Set to the VIOS for the specified device. This does
2272 * NOT send any cancel to the VIOS. That must be done separately.
2275 * 0 on success / other on failure
2277 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
2279 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2280 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2281 struct ibmvfc_cmd
*tmf
;
2282 struct ibmvfc_event
*evt
, *found_evt
;
2283 union ibmvfc_iu rsp_iu
;
2284 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
2285 int rc
, rsp_rc
= -EBUSY
;
2286 unsigned long flags
, timeout
= IBMVFC_ABORT_TIMEOUT
;
2289 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2291 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2292 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2299 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2300 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
2301 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2305 if (vhost
->state
== IBMVFC_ACTIVE
) {
2306 evt
= ibmvfc_get_event(vhost
);
2307 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
2310 memset(tmf
, 0, sizeof(*tmf
));
2311 tmf
->resp
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) + offsetof(struct ibmvfc_cmd
, rsp
));
2312 tmf
->resp
.len
= cpu_to_be32(sizeof(tmf
->rsp
));
2313 tmf
->frame_type
= cpu_to_be32(IBMVFC_SCSI_FCP_TYPE
);
2314 tmf
->payload_len
= cpu_to_be32(sizeof(tmf
->iu
));
2315 tmf
->resp_len
= cpu_to_be32(sizeof(tmf
->rsp
));
2316 tmf
->cancel_key
= cpu_to_be32((unsigned long)sdev
->hostdata
);
2317 tmf
->tgt_scsi_id
= cpu_to_be64(rport
->port_id
);
2318 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
2319 tmf
->flags
= cpu_to_be16((IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
));
2320 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
2321 evt
->sync_iu
= &rsp_iu
;
2323 init_completion(&evt
->comp
);
2324 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2327 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2330 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
2334 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
2335 timeout
= wait_for_completion_timeout(&evt
->comp
, timeout
);
2338 rc
= ibmvfc_cancel_all(sdev
, 0);
2340 rc
= ibmvfc_wait_for_ops(vhost
, sdev
->hostdata
, ibmvfc_match_key
);
2346 sdev_printk(KERN_INFO
, sdev
, "Cancel failed, resetting host\n");
2347 ibmvfc_reset_host(vhost
);
2349 rc
= ibmvfc_wait_for_ops(vhost
, sdev
->hostdata
, ibmvfc_match_key
);
2354 rc
= ibmvfc_wait_for_ops(vhost
, evt
, ibmvfc_match_evt
);
2355 if (rc
!= SUCCESS
) {
2356 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2357 ibmvfc_hard_reset_host(vhost
);
2358 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2366 if (rsp_iu
.cmd
.status
)
2367 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2370 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2371 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2373 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
2374 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2375 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu
.cmd
.status
), be16_to_cpu(rsp_iu
.cmd
.error
)),
2376 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2377 fc_rsp
->scsi_status
);
2380 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
2383 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2384 ibmvfc_free_event(evt
);
2385 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2390 * ibmvfc_eh_abort_handler - Abort a command
2391 * @cmd: scsi command to abort
2394 * SUCCESS / FAST_IO_FAIL / FAILED
2396 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
2398 struct scsi_device
*sdev
= cmd
->device
;
2399 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2400 int cancel_rc
, block_rc
;
2404 block_rc
= fc_block_scsi_eh(cmd
);
2405 ibmvfc_wait_while_resetting(vhost
);
2406 if (block_rc
!= FAST_IO_FAIL
) {
2407 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2408 ibmvfc_abort_task_set(sdev
);
2410 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2413 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2415 if (block_rc
== FAST_IO_FAIL
&& rc
!= FAILED
)
2423 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2424 * @cmd: scsi command struct
2427 * SUCCESS / FAST_IO_FAIL / FAILED
2429 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
2431 struct scsi_device
*sdev
= cmd
->device
;
2432 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2433 int cancel_rc
, block_rc
, reset_rc
= 0;
2437 block_rc
= fc_block_scsi_eh(cmd
);
2438 ibmvfc_wait_while_resetting(vhost
);
2439 if (block_rc
!= FAST_IO_FAIL
) {
2440 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
2441 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
2443 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2445 if (!cancel_rc
&& !reset_rc
)
2446 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2448 if (block_rc
== FAST_IO_FAIL
&& rc
!= FAILED
)
2456 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2457 * @sdev: scsi device struct
2458 * @data: return code
2461 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device
*sdev
, void *data
)
2463 unsigned long *rc
= data
;
2464 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2468 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2469 * @sdev: scsi device struct
2470 * @data: return code
2473 static void ibmvfc_dev_cancel_all_reset(struct scsi_device
*sdev
, void *data
)
2475 unsigned long *rc
= data
;
2476 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2480 * ibmvfc_eh_target_reset_handler - Reset the target
2481 * @cmd: scsi command struct
2484 * SUCCESS / FAST_IO_FAIL / FAILED
2486 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2488 struct scsi_device
*sdev
= cmd
->device
;
2489 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2490 struct scsi_target
*starget
= scsi_target(sdev
);
2494 unsigned long cancel_rc
= 0;
2497 block_rc
= fc_block_scsi_eh(cmd
);
2498 ibmvfc_wait_while_resetting(vhost
);
2499 if (block_rc
!= FAST_IO_FAIL
) {
2500 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_reset
);
2501 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2503 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_noreset
);
2505 if (!cancel_rc
&& !reset_rc
)
2506 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2508 if (block_rc
== FAST_IO_FAIL
&& rc
!= FAILED
)
2516 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2517 * @cmd: struct scsi_cmnd having problems
2520 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2523 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2525 block_rc
= fc_block_scsi_eh(cmd
);
2526 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2527 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2529 if (block_rc
== FAST_IO_FAIL
)
2530 return FAST_IO_FAIL
;
2532 return rc
? FAILED
: SUCCESS
;
2536 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2537 * @rport: rport struct
2542 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2544 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2545 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2546 struct fc_rport
*dev_rport
;
2547 struct scsi_device
*sdev
;
2551 shost_for_each_device(sdev
, shost
) {
2552 dev_rport
= starget_to_rport(scsi_target(sdev
));
2553 if (dev_rport
!= rport
)
2555 ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2558 rc
= ibmvfc_wait_for_ops(vhost
, rport
, ibmvfc_match_rport
);
2561 ibmvfc_issue_fc_host_lip(shost
);
2565 static const struct ibmvfc_async_desc ae_desc
[] = {
2566 { "PLOGI", IBMVFC_AE_ELS_PLOGI
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2567 { "LOGO", IBMVFC_AE_ELS_LOGO
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2568 { "PRLO", IBMVFC_AE_ELS_PRLO
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2569 { "N-Port SCN", IBMVFC_AE_SCN_NPORT
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2570 { "Group SCN", IBMVFC_AE_SCN_GROUP
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2571 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN
, IBMVFC_DEFAULT_LOG_LEVEL
},
2572 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC
, IBMVFC_DEFAULT_LOG_LEVEL
},
2573 { "Link Up", IBMVFC_AE_LINK_UP
, IBMVFC_DEFAULT_LOG_LEVEL
},
2574 { "Link Down", IBMVFC_AE_LINK_DOWN
, IBMVFC_DEFAULT_LOG_LEVEL
},
2575 { "Link Dead", IBMVFC_AE_LINK_DEAD
, IBMVFC_DEFAULT_LOG_LEVEL
},
2576 { "Halt", IBMVFC_AE_HALT
, IBMVFC_DEFAULT_LOG_LEVEL
},
2577 { "Resume", IBMVFC_AE_RESUME
, IBMVFC_DEFAULT_LOG_LEVEL
},
2578 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED
, IBMVFC_DEFAULT_LOG_LEVEL
},
2581 static const struct ibmvfc_async_desc unknown_ae
= {
2582 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
2586 * ibmvfc_get_ae_desc - Get text description for async event
2590 static const struct ibmvfc_async_desc
*ibmvfc_get_ae_desc(u64 ae
)
2594 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2595 if (ae_desc
[i
].ae
== ae
)
2601 static const struct {
2602 enum ibmvfc_ae_link_state state
;
2605 { IBMVFC_AE_LS_LINK_UP
, " link up" },
2606 { IBMVFC_AE_LS_LINK_BOUNCED
, " link bounced" },
2607 { IBMVFC_AE_LS_LINK_DOWN
, " link down" },
2608 { IBMVFC_AE_LS_LINK_DEAD
, " link dead" },
2612 * ibmvfc_get_link_state - Get text description for link state
2613 * @state: link state
2616 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state
)
2620 for (i
= 0; i
< ARRAY_SIZE(link_desc
); i
++)
2621 if (link_desc
[i
].state
== state
)
2622 return link_desc
[i
].desc
;
2628 * ibmvfc_handle_async - Handle an async event from the adapter
2629 * @crq: crq to process
2630 * @vhost: ibmvfc host struct
2633 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2634 struct ibmvfc_host
*vhost
)
2636 const struct ibmvfc_async_desc
*desc
= ibmvfc_get_ae_desc(be64_to_cpu(crq
->event
));
2637 struct ibmvfc_target
*tgt
;
2639 ibmvfc_log(vhost
, desc
->log_level
, "%s event received. scsi_id: %llx, wwpn: %llx,"
2640 " node_name: %llx%s\n", desc
->desc
, crq
->scsi_id
, crq
->wwpn
, crq
->node_name
,
2641 ibmvfc_get_link_state(crq
->link_state
));
2643 switch (be64_to_cpu(crq
->event
)) {
2644 case IBMVFC_AE_RESUME
:
2645 switch (crq
->link_state
) {
2646 case IBMVFC_AE_LS_LINK_DOWN
:
2647 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2649 case IBMVFC_AE_LS_LINK_DEAD
:
2650 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2652 case IBMVFC_AE_LS_LINK_UP
:
2653 case IBMVFC_AE_LS_LINK_BOUNCED
:
2655 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2656 vhost
->delay_init
= 1;
2657 __ibmvfc_reset_host(vhost
);
2662 case IBMVFC_AE_LINK_UP
:
2663 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2664 vhost
->delay_init
= 1;
2665 __ibmvfc_reset_host(vhost
);
2667 case IBMVFC_AE_SCN_FABRIC
:
2668 case IBMVFC_AE_SCN_DOMAIN
:
2669 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2670 if (vhost
->state
< IBMVFC_HALTED
) {
2671 vhost
->delay_init
= 1;
2672 __ibmvfc_reset_host(vhost
);
2675 case IBMVFC_AE_SCN_NPORT
:
2676 case IBMVFC_AE_SCN_GROUP
:
2677 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2678 ibmvfc_reinit_host(vhost
);
2680 case IBMVFC_AE_ELS_LOGO
:
2681 case IBMVFC_AE_ELS_PRLO
:
2682 case IBMVFC_AE_ELS_PLOGI
:
2683 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
2684 if (!crq
->scsi_id
&& !crq
->wwpn
&& !crq
->node_name
)
2686 if (crq
->scsi_id
&& cpu_to_be64(tgt
->scsi_id
) != crq
->scsi_id
)
2688 if (crq
->wwpn
&& cpu_to_be64(tgt
->ids
.port_name
) != crq
->wwpn
)
2690 if (crq
->node_name
&& cpu_to_be64(tgt
->ids
.node_name
) != crq
->node_name
)
2692 if (tgt
->need_login
&& be64_to_cpu(crq
->event
) == IBMVFC_AE_ELS_LOGO
)
2694 if (!tgt
->need_login
|| be64_to_cpu(crq
->event
) == IBMVFC_AE_ELS_PLOGI
) {
2695 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2696 ibmvfc_reinit_host(vhost
);
2700 case IBMVFC_AE_LINK_DOWN
:
2701 case IBMVFC_AE_ADAPTER_FAILED
:
2702 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2704 case IBMVFC_AE_LINK_DEAD
:
2705 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2707 case IBMVFC_AE_HALT
:
2708 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2711 dev_err(vhost
->dev
, "Unknown async event received: %lld\n", crq
->event
);
2717 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2718 * @crq: Command/Response queue
2719 * @vhost: ibmvfc host struct
2722 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2725 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)be64_to_cpu(crq
->ioba
);
2727 switch (crq
->valid
) {
2728 case IBMVFC_CRQ_INIT_RSP
:
2729 switch (crq
->format
) {
2730 case IBMVFC_CRQ_INIT
:
2731 dev_info(vhost
->dev
, "Partner initialized\n");
2732 /* Send back a response */
2733 rc
= ibmvfc_send_crq_init_complete(vhost
);
2735 ibmvfc_init_host(vhost
);
2737 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2739 case IBMVFC_CRQ_INIT_COMPLETE
:
2740 dev_info(vhost
->dev
, "Partner initialization complete\n");
2741 ibmvfc_init_host(vhost
);
2744 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2747 case IBMVFC_CRQ_XPORT_EVENT
:
2748 vhost
->state
= IBMVFC_NO_CRQ
;
2749 vhost
->logged_in
= 0;
2750 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2751 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2752 /* We need to re-setup the interpartition connection */
2753 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2754 vhost
->client_migrated
= 1;
2755 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2756 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2757 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_REENABLE
);
2759 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2760 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2761 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2762 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_RESET
);
2765 case IBMVFC_CRQ_CMD_RSP
:
2768 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2772 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2775 /* The only kind of payload CRQs we should get are responses to
2776 * things we send. Make sure this response is to something we
2779 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2780 dev_err(vhost
->dev
, "Returned correlation_token 0x%08llx is invalid!\n",
2785 if (unlikely(atomic_read(&evt
->free
))) {
2786 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08llx!\n",
2791 del_timer(&evt
->timer
);
2792 list_del(&evt
->queue
);
2793 ibmvfc_trc_end(evt
);
2798 * ibmvfc_scan_finished - Check if the device scan is done.
2799 * @shost: scsi host struct
2800 * @time: current elapsed time
2803 * 0 if scan is not done / 1 if scan is done
2805 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2807 unsigned long flags
;
2808 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2811 spin_lock_irqsave(shost
->host_lock
, flags
);
2812 if (time
>= (init_timeout
* HZ
)) {
2813 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2814 "continuing initialization\n", init_timeout
);
2818 if (vhost
->scan_complete
)
2820 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2825 * ibmvfc_slave_alloc - Setup the device's task set value
2826 * @sdev: struct scsi_device device to configure
2828 * Set the device's task set value so that error handling works as
2832 * 0 on success / -ENXIO if device does not exist
2834 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2836 struct Scsi_Host
*shost
= sdev
->host
;
2837 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2838 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2839 unsigned long flags
= 0;
2841 if (!rport
|| fc_remote_port_chkready(rport
))
2844 spin_lock_irqsave(shost
->host_lock
, flags
);
2845 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2846 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2851 * ibmvfc_target_alloc - Setup the target's task set value
2852 * @starget: struct scsi_target
2854 * Set the target's task set value so that error handling works as
2858 * 0 on success / -ENXIO if device does not exist
2860 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2862 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2863 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2864 unsigned long flags
= 0;
2866 spin_lock_irqsave(shost
->host_lock
, flags
);
2867 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2868 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2873 * ibmvfc_slave_configure - Configure the device
2874 * @sdev: struct scsi_device device to configure
2876 * Enable allow_restart for a device if it is a disk. Adjust the
2877 * queue_depth here also.
2882 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2884 struct Scsi_Host
*shost
= sdev
->host
;
2885 unsigned long flags
= 0;
2887 spin_lock_irqsave(shost
->host_lock
, flags
);
2888 if (sdev
->type
== TYPE_DISK
)
2889 sdev
->allow_restart
= 1;
2891 if (sdev
->tagged_supported
)
2892 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
,
2895 scsi_adjust_queue_depth(sdev
, 0, sdev
->queue_depth
);
2896 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2901 * ibmvfc_change_queue_depth - Change the device's queue depth
2902 * @sdev: scsi device struct
2903 * @qdepth: depth to set
2904 * @reason: calling context
2909 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
,
2912 if (reason
!= SCSI_QDEPTH_DEFAULT
)
2915 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2916 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2918 scsi_adjust_queue_depth(sdev
, 0, qdepth
);
2919 return sdev
->queue_depth
;
2922 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2923 struct device_attribute
*attr
, char *buf
)
2925 struct Scsi_Host
*shost
= class_to_shost(dev
);
2926 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2928 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2929 vhost
->login_buf
->resp
.partition_name
);
2932 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2933 struct device_attribute
*attr
, char *buf
)
2935 struct Scsi_Host
*shost
= class_to_shost(dev
);
2936 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2938 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2939 vhost
->login_buf
->resp
.device_name
);
2942 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2943 struct device_attribute
*attr
, char *buf
)
2945 struct Scsi_Host
*shost
= class_to_shost(dev
);
2946 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2948 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2949 vhost
->login_buf
->resp
.port_loc_code
);
2952 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2953 struct device_attribute
*attr
, char *buf
)
2955 struct Scsi_Host
*shost
= class_to_shost(dev
);
2956 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2958 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2959 vhost
->login_buf
->resp
.drc_name
);
2962 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2963 struct device_attribute
*attr
, char *buf
)
2965 struct Scsi_Host
*shost
= class_to_shost(dev
);
2966 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2967 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2970 static ssize_t
ibmvfc_show_host_capabilities(struct device
*dev
,
2971 struct device_attribute
*attr
, char *buf
)
2973 struct Scsi_Host
*shost
= class_to_shost(dev
);
2974 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2975 return snprintf(buf
, PAGE_SIZE
, "%llx\n", vhost
->login_buf
->resp
.capabilities
);
2979 * ibmvfc_show_log_level - Show the adapter's error logging level
2980 * @dev: class device struct
2984 * number of bytes printed to buffer
2986 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2987 struct device_attribute
*attr
, char *buf
)
2989 struct Scsi_Host
*shost
= class_to_shost(dev
);
2990 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2991 unsigned long flags
= 0;
2994 spin_lock_irqsave(shost
->host_lock
, flags
);
2995 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2996 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3001 * ibmvfc_store_log_level - Change the adapter's error logging level
3002 * @dev: class device struct
3006 * number of bytes printed to buffer
3008 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
3009 struct device_attribute
*attr
,
3010 const char *buf
, size_t count
)
3012 struct Scsi_Host
*shost
= class_to_shost(dev
);
3013 struct ibmvfc_host
*vhost
= shost_priv(shost
);
3014 unsigned long flags
= 0;
3016 spin_lock_irqsave(shost
->host_lock
, flags
);
3017 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
3018 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3022 static DEVICE_ATTR(partition_name
, S_IRUGO
, ibmvfc_show_host_partition_name
, NULL
);
3023 static DEVICE_ATTR(device_name
, S_IRUGO
, ibmvfc_show_host_device_name
, NULL
);
3024 static DEVICE_ATTR(port_loc_code
, S_IRUGO
, ibmvfc_show_host_loc_code
, NULL
);
3025 static DEVICE_ATTR(drc_name
, S_IRUGO
, ibmvfc_show_host_drc_name
, NULL
);
3026 static DEVICE_ATTR(npiv_version
, S_IRUGO
, ibmvfc_show_host_npiv_version
, NULL
);
3027 static DEVICE_ATTR(capabilities
, S_IRUGO
, ibmvfc_show_host_capabilities
, NULL
);
3028 static DEVICE_ATTR(log_level
, S_IRUGO
| S_IWUSR
,
3029 ibmvfc_show_log_level
, ibmvfc_store_log_level
);
3031 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3033 * ibmvfc_read_trace - Dump the adapter trace
3034 * @filp: open sysfs file
3035 * @kobj: kobject struct
3036 * @bin_attr: bin_attribute struct
3039 * @count: buffer size
3042 * number of bytes printed to buffer
3044 static ssize_t
ibmvfc_read_trace(struct file
*filp
, struct kobject
*kobj
,
3045 struct bin_attribute
*bin_attr
,
3046 char *buf
, loff_t off
, size_t count
)
3048 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
3049 struct Scsi_Host
*shost
= class_to_shost(dev
);
3050 struct ibmvfc_host
*vhost
= shost_priv(shost
);
3051 unsigned long flags
= 0;
3052 int size
= IBMVFC_TRACE_SIZE
;
3053 char *src
= (char *)vhost
->trace
;
3057 if (off
+ count
> size
) {
3062 spin_lock_irqsave(shost
->host_lock
, flags
);
3063 memcpy(buf
, &src
[off
], count
);
3064 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3068 static struct bin_attribute ibmvfc_trace_attr
= {
3074 .read
= ibmvfc_read_trace
,
3078 static struct device_attribute
*ibmvfc_attrs
[] = {
3079 &dev_attr_partition_name
,
3080 &dev_attr_device_name
,
3081 &dev_attr_port_loc_code
,
3083 &dev_attr_npiv_version
,
3084 &dev_attr_capabilities
,
3085 &dev_attr_log_level
,
3089 static struct scsi_host_template driver_template
= {
3090 .module
= THIS_MODULE
,
3091 .name
= "IBM POWER Virtual FC Adapter",
3092 .proc_name
= IBMVFC_NAME
,
3093 .queuecommand
= ibmvfc_queuecommand
,
3094 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
3095 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
3096 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
3097 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
3098 .slave_alloc
= ibmvfc_slave_alloc
,
3099 .slave_configure
= ibmvfc_slave_configure
,
3100 .target_alloc
= ibmvfc_target_alloc
,
3101 .scan_finished
= ibmvfc_scan_finished
,
3102 .change_queue_depth
= ibmvfc_change_queue_depth
,
3103 .change_queue_type
= scsi_change_queue_type
,
3105 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
3107 .sg_tablesize
= SG_ALL
,
3108 .max_sectors
= IBMVFC_MAX_SECTORS
,
3109 .use_clustering
= ENABLE_CLUSTERING
,
3110 .shost_attrs
= ibmvfc_attrs
,
3115 * ibmvfc_next_async_crq - Returns the next entry in async queue
3116 * @vhost: ibmvfc host struct
3119 * Pointer to next entry in queue / NULL if empty
3121 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
3123 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
3124 struct ibmvfc_async_crq
*crq
;
3126 crq
= &async_crq
->msgs
[async_crq
->cur
];
3127 if (crq
->valid
& 0x80) {
3128 if (++async_crq
->cur
== async_crq
->size
)
3138 * ibmvfc_next_crq - Returns the next entry in message queue
3139 * @vhost: ibmvfc host struct
3142 * Pointer to next entry in queue / NULL if empty
3144 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
3146 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
3147 struct ibmvfc_crq
*crq
;
3149 crq
= &queue
->msgs
[queue
->cur
];
3150 if (crq
->valid
& 0x80) {
3151 if (++queue
->cur
== queue
->size
)
3161 * ibmvfc_interrupt - Interrupt handler
3162 * @irq: number of irq to handle, not used
3163 * @dev_instance: ibmvfc_host that received interrupt
3168 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
3170 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
3171 unsigned long flags
;
3173 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3174 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
3175 tasklet_schedule(&vhost
->tasklet
);
3176 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3181 * ibmvfc_tasklet - Interrupt handler tasklet
3182 * @data: ibmvfc host struct
3187 static void ibmvfc_tasklet(void *data
)
3189 struct ibmvfc_host
*vhost
= data
;
3190 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
3191 struct ibmvfc_crq
*crq
;
3192 struct ibmvfc_async_crq
*async
;
3193 unsigned long flags
;
3196 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3198 /* Pull all the valid messages off the async CRQ */
3199 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3200 ibmvfc_handle_async(async
, vhost
);
3205 /* Pull all the valid messages off the CRQ */
3206 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3207 ibmvfc_handle_crq(crq
, vhost
);
3212 vio_enable_interrupts(vdev
);
3213 if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3214 vio_disable_interrupts(vdev
);
3215 ibmvfc_handle_async(async
, vhost
);
3218 } else if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3219 vio_disable_interrupts(vdev
);
3220 ibmvfc_handle_crq(crq
, vhost
);
3227 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3231 * ibmvfc_init_tgt - Set the next init job step for the target
3232 * @tgt: ibmvfc target struct
3233 * @job_step: job step to perform
3236 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
3237 void (*job_step
) (struct ibmvfc_target
*))
3239 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
3240 tgt
->job_step
= job_step
;
3241 wake_up(&tgt
->vhost
->work_wait_q
);
3245 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3246 * @tgt: ibmvfc target struct
3247 * @job_step: initialization job step
3249 * Returns: 1 if step will be retried / 0 if not
3252 static int ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
3253 void (*job_step
) (struct ibmvfc_target
*))
3255 if (++tgt
->init_retries
> IBMVFC_MAX_TGT_INIT_RETRIES
) {
3256 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3257 wake_up(&tgt
->vhost
->work_wait_q
);
3260 ibmvfc_init_tgt(tgt
, job_step
);
3264 /* Defined in FC-LS */
3265 static const struct {
3282 * ibmvfc_get_prli_rsp - Find PRLI response index
3283 * @flags: PRLI response flags
3286 static int ibmvfc_get_prli_rsp(u16 flags
)
3289 int code
= (flags
& 0x0f00) >> 8;
3291 for (i
= 0; i
< ARRAY_SIZE(prli_rsp
); i
++)
3292 if (prli_rsp
[i
].code
== code
)
3299 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3300 * @evt: ibmvfc event struct
3303 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
3305 struct ibmvfc_target
*tgt
= evt
->tgt
;
3306 struct ibmvfc_host
*vhost
= evt
->vhost
;
3307 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
3308 struct ibmvfc_prli_svc_parms
*parms
= &rsp
->parms
;
3309 u32 status
= be16_to_cpu(rsp
->common
.status
);
3310 int index
, level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3312 vhost
->discovery_threads
--;
3313 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3315 case IBMVFC_MAD_SUCCESS
:
3316 tgt_dbg(tgt
, "Process Login succeeded: %X %02X %04X\n",
3317 parms
->type
, parms
->flags
, parms
->service_parms
);
3319 if (parms
->type
== IBMVFC_SCSI_FCP_TYPE
) {
3320 index
= ibmvfc_get_prli_rsp(be16_to_cpu(parms
->flags
));
3321 if (prli_rsp
[index
].logged_in
) {
3322 if (be16_to_cpu(parms
->flags
) & IBMVFC_PRLI_EST_IMG_PAIR
) {
3323 tgt
->need_login
= 0;
3325 if (be32_to_cpu(parms
->service_parms
) & IBMVFC_PRLI_TARGET_FUNC
)
3326 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_TARGET
;
3327 if (be32_to_cpu(parms
->service_parms
) & IBMVFC_PRLI_INITIATOR_FUNC
)
3328 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_INITIATOR
;
3331 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3332 } else if (prli_rsp
[index
].retry
)
3333 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3335 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3337 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3339 case IBMVFC_MAD_DRIVER_FAILED
:
3341 case IBMVFC_MAD_CRQ_ERROR
:
3342 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3344 case IBMVFC_MAD_FAILED
:
3346 if ((be16_to_cpu(rsp
->status
) & IBMVFC_VIOS_FAILURE
) &&
3347 be16_to_cpu(rsp
->error
) == IBMVFC_PLOGI_REQUIRED
)
3348 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3349 else if (tgt
->logo_rcvd
)
3350 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3351 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
3352 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3354 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3356 tgt_log(tgt
, level
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3357 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
3358 rsp
->status
, rsp
->error
, status
);
3362 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3363 ibmvfc_free_event(evt
);
3364 wake_up(&vhost
->work_wait_q
);
3368 * ibmvfc_tgt_send_prli - Send a process login
3369 * @tgt: ibmvfc target struct
3372 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
3374 struct ibmvfc_process_login
*prli
;
3375 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3376 struct ibmvfc_event
*evt
;
3378 if (vhost
->discovery_threads
>= disc_threads
)
3381 kref_get(&tgt
->kref
);
3382 evt
= ibmvfc_get_event(vhost
);
3383 vhost
->discovery_threads
++;
3384 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
3386 prli
= &evt
->iu
.prli
;
3387 memset(prli
, 0, sizeof(*prli
));
3388 prli
->common
.version
= cpu_to_be32(1);
3389 prli
->common
.opcode
= cpu_to_be32(IBMVFC_PROCESS_LOGIN
);
3390 prli
->common
.length
= cpu_to_be16(sizeof(*prli
));
3391 prli
->scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3393 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
3394 prli
->parms
.flags
= cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR
);
3395 prli
->parms
.service_parms
= cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC
);
3397 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3398 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3399 vhost
->discovery_threads
--;
3400 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3401 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3403 tgt_dbg(tgt
, "Sent process login\n");
3407 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3408 * @evt: ibmvfc event struct
3411 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
3413 struct ibmvfc_target
*tgt
= evt
->tgt
;
3414 struct ibmvfc_host
*vhost
= evt
->vhost
;
3415 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
3416 u32 status
= be16_to_cpu(rsp
->common
.status
);
3417 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3419 vhost
->discovery_threads
--;
3420 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3422 case IBMVFC_MAD_SUCCESS
:
3423 tgt_dbg(tgt
, "Port Login succeeded\n");
3424 if (tgt
->ids
.port_name
&&
3425 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
3427 tgt_dbg(tgt
, "Port re-init required\n");
3430 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
3431 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
3432 tgt
->ids
.port_id
= tgt
->scsi_id
;
3433 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
3434 sizeof(tgt
->service_parms
));
3435 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
3436 sizeof(tgt
->service_parms_change
));
3437 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
3439 case IBMVFC_MAD_DRIVER_FAILED
:
3441 case IBMVFC_MAD_CRQ_ERROR
:
3442 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3444 case IBMVFC_MAD_FAILED
:
3446 if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
3447 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3449 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3451 tgt_log(tgt
, level
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3452 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)), rsp
->status
, rsp
->error
,
3453 ibmvfc_get_fc_type(be16_to_cpu(rsp
->fc_type
)), rsp
->fc_type
,
3454 ibmvfc_get_ls_explain(be16_to_cpu(rsp
->fc_explain
)), rsp
->fc_explain
, status
);
3458 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3459 ibmvfc_free_event(evt
);
3460 wake_up(&vhost
->work_wait_q
);
3464 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3465 * @tgt: ibmvfc target struct
3468 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
3470 struct ibmvfc_port_login
*plogi
;
3471 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3472 struct ibmvfc_event
*evt
;
3474 if (vhost
->discovery_threads
>= disc_threads
)
3477 kref_get(&tgt
->kref
);
3479 evt
= ibmvfc_get_event(vhost
);
3480 vhost
->discovery_threads
++;
3481 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3482 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
3484 plogi
= &evt
->iu
.plogi
;
3485 memset(plogi
, 0, sizeof(*plogi
));
3486 plogi
->common
.version
= cpu_to_be32(1);
3487 plogi
->common
.opcode
= cpu_to_be32(IBMVFC_PORT_LOGIN
);
3488 plogi
->common
.length
= cpu_to_be16(sizeof(*plogi
));
3489 plogi
->scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3491 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3492 vhost
->discovery_threads
--;
3493 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3494 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3496 tgt_dbg(tgt
, "Sent port login\n");
3500 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3501 * @evt: ibmvfc event struct
3504 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
3506 struct ibmvfc_target
*tgt
= evt
->tgt
;
3507 struct ibmvfc_host
*vhost
= evt
->vhost
;
3508 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
3509 u32 status
= be16_to_cpu(rsp
->common
.status
);
3511 vhost
->discovery_threads
--;
3512 ibmvfc_free_event(evt
);
3513 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3516 case IBMVFC_MAD_SUCCESS
:
3517 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
3519 case IBMVFC_MAD_DRIVER_FAILED
:
3520 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3521 wake_up(&vhost
->work_wait_q
);
3523 case IBMVFC_MAD_FAILED
:
3525 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
3529 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
3530 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
3531 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
3532 tgt
->scsi_id
!= tgt
->new_scsi_id
)
3533 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3534 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3535 wake_up(&vhost
->work_wait_q
);
3539 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3540 * @tgt: ibmvfc target struct
3543 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
3545 struct ibmvfc_implicit_logout
*mad
;
3546 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3547 struct ibmvfc_event
*evt
;
3549 if (vhost
->discovery_threads
>= disc_threads
)
3552 kref_get(&tgt
->kref
);
3553 evt
= ibmvfc_get_event(vhost
);
3554 vhost
->discovery_threads
++;
3555 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
3557 mad
= &evt
->iu
.implicit_logout
;
3558 memset(mad
, 0, sizeof(*mad
));
3559 mad
->common
.version
= cpu_to_be32(1);
3560 mad
->common
.opcode
= cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT
);
3561 mad
->common
.length
= cpu_to_be16(sizeof(*mad
));
3562 mad
->old_scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3564 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3565 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3566 vhost
->discovery_threads
--;
3567 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3568 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3570 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3574 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3575 * @mad: ibmvfc passthru mad struct
3576 * @tgt: ibmvfc target struct
3579 * 1 if PLOGI needed / 0 if PLOGI not needed
3581 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3582 struct ibmvfc_target
*tgt
)
3584 if (memcmp(&mad
->fc_iu
.response
[2], &tgt
->ids
.port_name
,
3585 sizeof(tgt
->ids
.port_name
)))
3587 if (memcmp(&mad
->fc_iu
.response
[4], &tgt
->ids
.node_name
,
3588 sizeof(tgt
->ids
.node_name
)))
3590 if (be32_to_cpu(mad
->fc_iu
.response
[6]) != tgt
->scsi_id
)
3596 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3597 * @evt: ibmvfc event struct
3600 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3602 struct ibmvfc_target
*tgt
= evt
->tgt
;
3603 struct ibmvfc_host
*vhost
= evt
->vhost
;
3604 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3605 u32 status
= be16_to_cpu(mad
->common
.status
);
3606 u8 fc_reason
, fc_explain
;
3608 vhost
->discovery_threads
--;
3609 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3610 del_timer(&tgt
->timer
);
3613 case IBMVFC_MAD_SUCCESS
:
3614 tgt_dbg(tgt
, "ADISC succeeded\n");
3615 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3616 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3618 case IBMVFC_MAD_DRIVER_FAILED
:
3620 case IBMVFC_MAD_FAILED
:
3622 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3623 fc_reason
= (be32_to_cpu(mad
->fc_iu
.response
[1]) & 0x00ff0000) >> 16;
3624 fc_explain
= (be32_to_cpu(mad
->fc_iu
.response
[1]) & 0x0000ff00) >> 8;
3625 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3626 ibmvfc_get_cmd_error(be16_to_cpu(mad
->iu
.status
), be16_to_cpu(mad
->iu
.error
)),
3627 mad
->iu
.status
, mad
->iu
.error
,
3628 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3629 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3633 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3634 ibmvfc_free_event(evt
);
3635 wake_up(&vhost
->work_wait_q
);
3639 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3640 * @evt: ibmvfc event struct
3643 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3645 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3647 memset(mad
, 0, sizeof(*mad
));
3648 mad
->common
.version
= cpu_to_be32(1);
3649 mad
->common
.opcode
= cpu_to_be32(IBMVFC_PASSTHRU
);
3650 mad
->common
.length
= cpu_to_be16(sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
));
3651 mad
->cmd_ioba
.va
= cpu_to_be64((u64
)be64_to_cpu(evt
->crq
.ioba
) +
3652 offsetof(struct ibmvfc_passthru_mad
, iu
));
3653 mad
->cmd_ioba
.len
= cpu_to_be32(sizeof(mad
->iu
));
3654 mad
->iu
.cmd_len
= cpu_to_be32(sizeof(mad
->fc_iu
.payload
));
3655 mad
->iu
.rsp_len
= cpu_to_be32(sizeof(mad
->fc_iu
.response
));
3656 mad
->iu
.cmd
.va
= cpu_to_be64((u64
)be64_to_cpu(evt
->crq
.ioba
) +
3657 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3658 offsetof(struct ibmvfc_passthru_fc_iu
, payload
));
3659 mad
->iu
.cmd
.len
= cpu_to_be32(sizeof(mad
->fc_iu
.payload
));
3660 mad
->iu
.rsp
.va
= cpu_to_be64((u64
)be64_to_cpu(evt
->crq
.ioba
) +
3661 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3662 offsetof(struct ibmvfc_passthru_fc_iu
, response
));
3663 mad
->iu
.rsp
.len
= cpu_to_be32(sizeof(mad
->fc_iu
.response
));
3667 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3668 * @evt: ibmvfc event struct
3670 * Just cleanup this event struct. Everything else is handled by
3671 * the ADISC completion handler. If the ADISC never actually comes
3672 * back, we still have the timer running on the ADISC event struct
3673 * which will fire and cause the CRQ to get reset.
3676 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event
*evt
)
3678 struct ibmvfc_host
*vhost
= evt
->vhost
;
3679 struct ibmvfc_target
*tgt
= evt
->tgt
;
3681 tgt_dbg(tgt
, "ADISC cancel complete\n");
3682 vhost
->abort_threads
--;
3683 ibmvfc_free_event(evt
);
3684 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3685 wake_up(&vhost
->work_wait_q
);
3689 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3690 * @tgt: ibmvfc target struct
3692 * If an ADISC times out, send a cancel. If the cancel times
3693 * out, reset the CRQ. When the ADISC comes back as cancelled,
3694 * log back into the target.
3696 static void ibmvfc_adisc_timeout(struct ibmvfc_target
*tgt
)
3698 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3699 struct ibmvfc_event
*evt
;
3700 struct ibmvfc_tmf
*tmf
;
3701 unsigned long flags
;
3704 tgt_dbg(tgt
, "ADISC timeout\n");
3705 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3706 if (vhost
->abort_threads
>= disc_threads
||
3707 tgt
->action
!= IBMVFC_TGT_ACTION_INIT_WAIT
||
3708 vhost
->state
!= IBMVFC_INITIALIZING
||
3709 vhost
->action
!= IBMVFC_HOST_ACTION_QUERY_TGTS
) {
3710 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3714 vhost
->abort_threads
++;
3715 kref_get(&tgt
->kref
);
3716 evt
= ibmvfc_get_event(vhost
);
3717 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_cancel_done
, IBMVFC_MAD_FORMAT
);
3721 memset(tmf
, 0, sizeof(*tmf
));
3722 tmf
->common
.version
= cpu_to_be32(1);
3723 tmf
->common
.opcode
= cpu_to_be32(IBMVFC_TMF_MAD
);
3724 tmf
->common
.length
= cpu_to_be16(sizeof(*tmf
));
3725 tmf
->scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3726 tmf
->cancel_key
= cpu_to_be32(tgt
->cancel_key
);
3728 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
3731 tgt_err(tgt
, "Failed to send cancel event for ADISC. rc=%d\n", rc
);
3732 vhost
->abort_threads
--;
3733 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3734 __ibmvfc_reset_host(vhost
);
3736 tgt_dbg(tgt
, "Attempting to cancel ADISC\n");
3737 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3741 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3742 * @tgt: ibmvfc target struct
3744 * When sending an ADISC we end up with two timers running. The
3745 * first timer is the timer in the ibmvfc target struct. If this
3746 * fires, we send a cancel to the target. The second timer is the
3747 * timer on the ibmvfc event for the ADISC, which is longer. If that
3748 * fires, it means the ADISC timed out and our attempt to cancel it
3749 * also failed, so we need to reset the CRQ.
3751 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3753 struct ibmvfc_passthru_mad
*mad
;
3754 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3755 struct ibmvfc_event
*evt
;
3757 if (vhost
->discovery_threads
>= disc_threads
)
3760 kref_get(&tgt
->kref
);
3761 evt
= ibmvfc_get_event(vhost
);
3762 vhost
->discovery_threads
++;
3763 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3766 ibmvfc_init_passthru(evt
);
3767 mad
= &evt
->iu
.passthru
;
3768 mad
->iu
.flags
= cpu_to_be32(IBMVFC_FC_ELS
);
3769 mad
->iu
.scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3770 mad
->iu
.cancel_key
= cpu_to_be32(tgt
->cancel_key
);
3772 mad
->fc_iu
.payload
[0] = cpu_to_be32(IBMVFC_ADISC
);
3773 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3774 sizeof(vhost
->login_buf
->resp
.port_name
));
3775 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3776 sizeof(vhost
->login_buf
->resp
.node_name
));
3777 mad
->fc_iu
.payload
[6] = cpu_to_be32(be64_to_cpu(vhost
->login_buf
->resp
.scsi_id
) & 0x00ffffff);
3779 if (timer_pending(&tgt
->timer
))
3780 mod_timer(&tgt
->timer
, jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
));
3782 tgt
->timer
.data
= (unsigned long) tgt
;
3783 tgt
->timer
.expires
= jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
);
3784 tgt
->timer
.function
= (void (*)(unsigned long))ibmvfc_adisc_timeout
;
3785 add_timer(&tgt
->timer
);
3788 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3789 if (ibmvfc_send_event(evt
, vhost
, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT
)) {
3790 vhost
->discovery_threads
--;
3791 del_timer(&tgt
->timer
);
3792 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3793 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3795 tgt_dbg(tgt
, "Sent ADISC\n");
3799 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3800 * @evt: ibmvfc event struct
3803 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3805 struct ibmvfc_target
*tgt
= evt
->tgt
;
3806 struct ibmvfc_host
*vhost
= evt
->vhost
;
3807 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3808 u32 status
= be16_to_cpu(rsp
->common
.status
);
3809 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3811 vhost
->discovery_threads
--;
3812 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3814 case IBMVFC_MAD_SUCCESS
:
3815 tgt_dbg(tgt
, "Query Target succeeded\n");
3816 tgt
->new_scsi_id
= be64_to_cpu(rsp
->scsi_id
);
3817 if (be64_to_cpu(rsp
->scsi_id
) != tgt
->scsi_id
)
3818 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3820 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3822 case IBMVFC_MAD_DRIVER_FAILED
:
3824 case IBMVFC_MAD_CRQ_ERROR
:
3825 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3827 case IBMVFC_MAD_FAILED
:
3829 if ((be16_to_cpu(rsp
->status
) & IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3830 be16_to_cpu(rsp
->error
) == IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3831 be16_to_cpu(rsp
->fc_explain
) == IBMVFC_PORT_NAME_NOT_REG
)
3832 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3833 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
3834 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3836 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3838 tgt_log(tgt
, level
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3839 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
3840 rsp
->status
, rsp
->error
, ibmvfc_get_fc_type(be16_to_cpu(rsp
->fc_type
)),
3841 rsp
->fc_type
, ibmvfc_get_gs_explain(be16_to_cpu(rsp
->fc_explain
)),
3842 rsp
->fc_explain
, status
);
3846 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3847 ibmvfc_free_event(evt
);
3848 wake_up(&vhost
->work_wait_q
);
3852 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3853 * @tgt: ibmvfc target struct
3856 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3858 struct ibmvfc_query_tgt
*query_tgt
;
3859 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3860 struct ibmvfc_event
*evt
;
3862 if (vhost
->discovery_threads
>= disc_threads
)
3865 kref_get(&tgt
->kref
);
3866 evt
= ibmvfc_get_event(vhost
);
3867 vhost
->discovery_threads
++;
3869 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3870 query_tgt
= &evt
->iu
.query_tgt
;
3871 memset(query_tgt
, 0, sizeof(*query_tgt
));
3872 query_tgt
->common
.version
= cpu_to_be32(1);
3873 query_tgt
->common
.opcode
= cpu_to_be32(IBMVFC_QUERY_TARGET
);
3874 query_tgt
->common
.length
= cpu_to_be16(sizeof(*query_tgt
));
3875 query_tgt
->wwpn
= cpu_to_be64(tgt
->ids
.port_name
);
3877 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3878 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3879 vhost
->discovery_threads
--;
3880 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3881 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3883 tgt_dbg(tgt
, "Sent Query Target\n");
3887 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3888 * @vhost: ibmvfc host struct
3889 * @scsi_id: SCSI ID to allocate target for
3892 * 0 on success / other on failure
3894 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3896 struct ibmvfc_target
*tgt
;
3897 unsigned long flags
;
3899 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3900 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3901 if (tgt
->scsi_id
== scsi_id
) {
3902 if (tgt
->need_login
)
3903 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3907 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3909 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_NOIO
);
3911 dev_err(vhost
->dev
, "Target allocation failure for scsi id %08llx\n",
3916 memset(tgt
, 0, sizeof(*tgt
));
3917 tgt
->scsi_id
= scsi_id
;
3918 tgt
->new_scsi_id
= scsi_id
;
3920 tgt
->need_login
= 1;
3921 tgt
->cancel_key
= vhost
->task_set
++;
3922 init_timer(&tgt
->timer
);
3923 kref_init(&tgt
->kref
);
3924 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3925 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3926 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3929 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3934 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3935 * @vhost: ibmvfc host struct
3938 * 0 on success / other on failure
3940 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3944 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3945 rc
= ibmvfc_alloc_target(vhost
,
3946 be32_to_cpu(vhost
->disc_buf
->scsi_id
[i
]) &
3947 IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3953 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3954 * @evt: ibmvfc event struct
3957 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3959 struct ibmvfc_host
*vhost
= evt
->vhost
;
3960 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3961 u32 mad_status
= be16_to_cpu(rsp
->common
.status
);
3962 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3964 switch (mad_status
) {
3965 case IBMVFC_MAD_SUCCESS
:
3966 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3967 vhost
->num_targets
= be32_to_cpu(rsp
->num_written
);
3968 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3970 case IBMVFC_MAD_FAILED
:
3971 level
+= ibmvfc_retry_host_init(vhost
);
3972 ibmvfc_log(vhost
, level
, "Discover Targets failed: %s (%x:%x)\n",
3973 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
3974 rsp
->status
, rsp
->error
);
3976 case IBMVFC_MAD_DRIVER_FAILED
:
3979 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3980 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3984 ibmvfc_free_event(evt
);
3985 wake_up(&vhost
->work_wait_q
);
3989 * ibmvfc_discover_targets - Send Discover Targets MAD
3990 * @vhost: ibmvfc host struct
3993 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3995 struct ibmvfc_discover_targets
*mad
;
3996 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3998 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3999 mad
= &evt
->iu
.discover_targets
;
4000 memset(mad
, 0, sizeof(*mad
));
4001 mad
->common
.version
= cpu_to_be32(1);
4002 mad
->common
.opcode
= cpu_to_be32(IBMVFC_DISC_TARGETS
);
4003 mad
->common
.length
= cpu_to_be16(sizeof(*mad
));
4004 mad
->bufflen
= cpu_to_be32(vhost
->disc_buf_sz
);
4005 mad
->buffer
.va
= cpu_to_be64(vhost
->disc_buf_dma
);
4006 mad
->buffer
.len
= cpu_to_be32(vhost
->disc_buf_sz
);
4007 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
4009 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4010 ibmvfc_dbg(vhost
, "Sent discover targets\n");
4012 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4016 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4017 * @evt: ibmvfc event struct
4020 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
4022 struct ibmvfc_host
*vhost
= evt
->vhost
;
4023 u32 mad_status
= be16_to_cpu(evt
->xfer_iu
->npiv_login
.common
.status
);
4024 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
4025 unsigned int npiv_max_sectors
;
4026 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
4028 switch (mad_status
) {
4029 case IBMVFC_MAD_SUCCESS
:
4030 ibmvfc_free_event(evt
);
4032 case IBMVFC_MAD_FAILED
:
4033 if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
4034 level
+= ibmvfc_retry_host_init(vhost
);
4036 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4037 ibmvfc_log(vhost
, level
, "NPIV Login failed: %s (%x:%x)\n",
4038 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
4039 rsp
->status
, rsp
->error
);
4040 ibmvfc_free_event(evt
);
4042 case IBMVFC_MAD_CRQ_ERROR
:
4043 ibmvfc_retry_host_init(vhost
);
4044 case IBMVFC_MAD_DRIVER_FAILED
:
4045 ibmvfc_free_event(evt
);
4048 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
4049 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4050 ibmvfc_free_event(evt
);
4054 vhost
->client_migrated
= 0;
4056 if (!(be32_to_cpu(rsp
->flags
) & IBMVFC_NATIVE_FC
)) {
4057 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
4059 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4060 wake_up(&vhost
->work_wait_q
);
4064 if (be32_to_cpu(rsp
->max_cmds
) <= IBMVFC_NUM_INTERNAL_REQ
) {
4065 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
4067 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4068 wake_up(&vhost
->work_wait_q
);
4072 vhost
->logged_in
= 1;
4073 npiv_max_sectors
= min((uint
)(be64_to_cpu(rsp
->max_dma_len
) >> 9), IBMVFC_MAX_SECTORS
);
4074 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
4075 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
4076 rsp
->drc_name
, npiv_max_sectors
);
4078 fc_host_fabric_name(vhost
->host
) = be64_to_cpu(rsp
->node_name
);
4079 fc_host_node_name(vhost
->host
) = be64_to_cpu(rsp
->node_name
);
4080 fc_host_port_name(vhost
->host
) = be64_to_cpu(rsp
->port_name
);
4081 fc_host_port_id(vhost
->host
) = be64_to_cpu(rsp
->scsi_id
);
4082 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
4083 fc_host_supported_classes(vhost
->host
) = 0;
4084 if (be32_to_cpu(rsp
->service_parms
.class1_parms
[0]) & 0x80000000)
4085 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
4086 if (be32_to_cpu(rsp
->service_parms
.class2_parms
[0]) & 0x80000000)
4087 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
4088 if (be32_to_cpu(rsp
->service_parms
.class3_parms
[0]) & 0x80000000)
4089 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
4090 fc_host_maxframe_size(vhost
->host
) =
4091 be16_to_cpu(rsp
->service_parms
.common
.bb_rcv_sz
) & 0x0fff;
4093 vhost
->host
->can_queue
= be32_to_cpu(rsp
->max_cmds
) - IBMVFC_NUM_INTERNAL_REQ
;
4094 vhost
->host
->max_sectors
= npiv_max_sectors
;
4095 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4096 wake_up(&vhost
->work_wait_q
);
4100 * ibmvfc_npiv_login - Sends NPIV login
4101 * @vhost: ibmvfc host struct
4104 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
4106 struct ibmvfc_npiv_login_mad
*mad
;
4107 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
4109 ibmvfc_gather_partition_info(vhost
);
4110 ibmvfc_set_login_info(vhost
);
4111 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
4113 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
4114 mad
= &evt
->iu
.npiv_login
;
4115 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
4116 mad
->common
.version
= cpu_to_be32(1);
4117 mad
->common
.opcode
= cpu_to_be32(IBMVFC_NPIV_LOGIN
);
4118 mad
->common
.length
= cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad
));
4119 mad
->buffer
.va
= cpu_to_be64(vhost
->login_buf_dma
);
4120 mad
->buffer
.len
= cpu_to_be32(sizeof(*vhost
->login_buf
));
4122 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
4124 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4125 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
4127 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4131 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4132 * @vhost: ibmvfc host struct
4135 static void ibmvfc_npiv_logout_done(struct ibmvfc_event
*evt
)
4137 struct ibmvfc_host
*vhost
= evt
->vhost
;
4138 u32 mad_status
= be16_to_cpu(evt
->xfer_iu
->npiv_logout
.common
.status
);
4140 ibmvfc_free_event(evt
);
4142 switch (mad_status
) {
4143 case IBMVFC_MAD_SUCCESS
:
4144 if (list_empty(&vhost
->sent
) &&
4145 vhost
->action
== IBMVFC_HOST_ACTION_LOGO_WAIT
) {
4146 ibmvfc_init_host(vhost
);
4150 case IBMVFC_MAD_FAILED
:
4151 case IBMVFC_MAD_NOT_SUPPORTED
:
4152 case IBMVFC_MAD_CRQ_ERROR
:
4153 case IBMVFC_MAD_DRIVER_FAILED
:
4155 ibmvfc_dbg(vhost
, "NPIV Logout failed. 0x%X\n", mad_status
);
4159 ibmvfc_hard_reset_host(vhost
);
4163 * ibmvfc_npiv_logout - Issue an NPIV Logout
4164 * @vhost: ibmvfc host struct
4167 static void ibmvfc_npiv_logout(struct ibmvfc_host
*vhost
)
4169 struct ibmvfc_npiv_logout_mad
*mad
;
4170 struct ibmvfc_event
*evt
;
4172 evt
= ibmvfc_get_event(vhost
);
4173 ibmvfc_init_event(evt
, ibmvfc_npiv_logout_done
, IBMVFC_MAD_FORMAT
);
4175 mad
= &evt
->iu
.npiv_logout
;
4176 memset(mad
, 0, sizeof(*mad
));
4177 mad
->common
.version
= cpu_to_be32(1);
4178 mad
->common
.opcode
= cpu_to_be32(IBMVFC_NPIV_LOGOUT
);
4179 mad
->common
.length
= cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad
));
4181 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO_WAIT
);
4183 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4184 ibmvfc_dbg(vhost
, "Sent NPIV logout\n");
4186 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4190 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4191 * @vhost: ibmvfc host struct
4194 * 1 if work to do / 0 if not
4196 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
4198 struct ibmvfc_target
*tgt
;
4200 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4201 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
4202 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4210 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4211 * @vhost: ibmvfc host struct
4214 * 1 if work to do / 0 if not
4216 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4218 struct ibmvfc_target
*tgt
;
4220 if (kthread_should_stop())
4222 switch (vhost
->action
) {
4223 case IBMVFC_HOST_ACTION_NONE
:
4224 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4225 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4227 case IBMVFC_HOST_ACTION_TGT_INIT
:
4228 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4229 if (vhost
->discovery_threads
== disc_threads
)
4231 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4232 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
4234 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4235 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4238 case IBMVFC_HOST_ACTION_LOGO
:
4239 case IBMVFC_HOST_ACTION_INIT
:
4240 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4241 case IBMVFC_HOST_ACTION_TGT_DEL
:
4242 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4243 case IBMVFC_HOST_ACTION_QUERY
:
4244 case IBMVFC_HOST_ACTION_RESET
:
4245 case IBMVFC_HOST_ACTION_REENABLE
:
4254 * ibmvfc_work_to_do - Is there task level work to do?
4255 * @vhost: ibmvfc host struct
4258 * 1 if work to do / 0 if not
4260 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4262 unsigned long flags
;
4265 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4266 rc
= __ibmvfc_work_to_do(vhost
);
4267 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4272 * ibmvfc_log_ae - Log async events if necessary
4273 * @vhost: ibmvfc host struct
4274 * @events: events to log
4277 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
4279 if (events
& IBMVFC_AE_RSCN
)
4280 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
4281 if ((events
& IBMVFC_AE_LINKDOWN
) &&
4282 vhost
->state
>= IBMVFC_HALTED
)
4283 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
4284 if ((events
& IBMVFC_AE_LINKUP
) &&
4285 vhost
->state
== IBMVFC_INITIALIZING
)
4286 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
4290 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4291 * @tgt: ibmvfc target struct
4294 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
4296 struct ibmvfc_host
*vhost
= tgt
->vhost
;
4297 struct fc_rport
*rport
;
4298 unsigned long flags
;
4300 tgt_dbg(tgt
, "Adding rport\n");
4301 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
4302 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4304 if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4305 tgt_dbg(tgt
, "Deleting rport\n");
4306 list_del(&tgt
->queue
);
4307 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DELETED_RPORT
);
4308 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4309 fc_remote_port_delete(rport
);
4310 del_timer_sync(&tgt
->timer
);
4311 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4313 } else if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DELETED_RPORT
) {
4314 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4319 tgt_dbg(tgt
, "rport add succeeded\n");
4321 rport
->maxframe_size
= be16_to_cpu(tgt
->service_parms
.common
.bb_rcv_sz
) & 0x0fff;
4322 rport
->supported_classes
= 0;
4323 tgt
->target_id
= rport
->scsi_target_id
;
4324 if (be32_to_cpu(tgt
->service_parms
.class1_parms
[0]) & 0x80000000)
4325 rport
->supported_classes
|= FC_COS_CLASS1
;
4326 if (be32_to_cpu(tgt
->service_parms
.class2_parms
[0]) & 0x80000000)
4327 rport
->supported_classes
|= FC_COS_CLASS2
;
4328 if (be32_to_cpu(tgt
->service_parms
.class3_parms
[0]) & 0x80000000)
4329 rport
->supported_classes
|= FC_COS_CLASS3
;
4331 blk_queue_max_segments(rport
->rqst_q
, 1);
4333 tgt_dbg(tgt
, "rport add failed\n");
4334 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4338 * ibmvfc_do_work - Do task level work
4339 * @vhost: ibmvfc host struct
4342 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
4344 struct ibmvfc_target
*tgt
;
4345 unsigned long flags
;
4346 struct fc_rport
*rport
;
4349 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
4350 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4351 vhost
->events_to_log
= 0;
4352 switch (vhost
->action
) {
4353 case IBMVFC_HOST_ACTION_NONE
:
4354 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4355 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4357 case IBMVFC_HOST_ACTION_RESET
:
4358 vhost
->action
= IBMVFC_HOST_ACTION_TGT_DEL
;
4359 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4360 rc
= ibmvfc_reset_crq(vhost
);
4361 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4363 vio_enable_interrupts(to_vio_dev(vhost
->dev
));
4364 if (rc
|| (rc
= ibmvfc_send_crq_init(vhost
)) ||
4365 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
4366 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4367 dev_err(vhost
->dev
, "Error after reset (rc=%d)\n", rc
);
4370 case IBMVFC_HOST_ACTION_REENABLE
:
4371 vhost
->action
= IBMVFC_HOST_ACTION_TGT_DEL
;
4372 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4373 rc
= ibmvfc_reenable_crq_queue(vhost
);
4374 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4375 if (rc
|| (rc
= ibmvfc_send_crq_init(vhost
))) {
4376 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4377 dev_err(vhost
->dev
, "Error after enable (rc=%d)\n", rc
);
4380 case IBMVFC_HOST_ACTION_LOGO
:
4381 vhost
->job_step(vhost
);
4383 case IBMVFC_HOST_ACTION_INIT
:
4384 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
4385 if (vhost
->delay_init
) {
4386 vhost
->delay_init
= 0;
4387 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4391 vhost
->job_step(vhost
);
4393 case IBMVFC_HOST_ACTION_QUERY
:
4394 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4395 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
4396 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
4398 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4399 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4400 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4406 if (!ibmvfc_dev_init_to_do(vhost
))
4407 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
4409 case IBMVFC_HOST_ACTION_TGT_DEL
:
4410 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4411 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4412 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4413 tgt_dbg(tgt
, "Deleting rport\n");
4416 list_del(&tgt
->queue
);
4417 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DELETED_RPORT
);
4418 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4420 fc_remote_port_delete(rport
);
4421 del_timer_sync(&tgt
->timer
);
4422 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4427 if (vhost
->state
== IBMVFC_INITIALIZING
) {
4428 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_DEL_FAILED
) {
4429 if (vhost
->reinit
) {
4431 scsi_block_requests(vhost
->host
);
4432 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4433 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4435 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
4436 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4437 wake_up(&vhost
->init_wait_q
);
4438 schedule_work(&vhost
->rport_add_work_q
);
4439 vhost
->init_retries
= 0;
4440 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4441 scsi_unblock_requests(vhost
->host
);
4446 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
4447 vhost
->job_step
= ibmvfc_discover_targets
;
4450 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4451 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4452 scsi_unblock_requests(vhost
->host
);
4453 wake_up(&vhost
->init_wait_q
);
4457 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4458 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
4459 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4460 ibmvfc_alloc_targets(vhost
);
4461 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4463 case IBMVFC_HOST_ACTION_TGT_INIT
:
4464 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4465 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4471 if (!ibmvfc_dev_init_to_do(vhost
))
4472 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL_FAILED
);
4478 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4482 * ibmvfc_work - Do task level work
4483 * @data: ibmvfc host struct
4488 static int ibmvfc_work(void *data
)
4490 struct ibmvfc_host
*vhost
= data
;
4493 set_user_nice(current
, MIN_NICE
);
4496 rc
= wait_event_interruptible(vhost
->work_wait_q
,
4497 ibmvfc_work_to_do(vhost
));
4501 if (kthread_should_stop())
4504 ibmvfc_do_work(vhost
);
4507 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
4512 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4513 * @vhost: ibmvfc host struct
4515 * Allocates a page for messages, maps it for dma, and registers
4516 * the crq with the hypervisor.
4519 * zero on success / other on failure
4521 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
4523 int rc
, retrc
= -ENOMEM
;
4524 struct device
*dev
= vhost
->dev
;
4525 struct vio_dev
*vdev
= to_vio_dev(dev
);
4526 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
4529 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
4534 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
4535 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
4536 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4538 if (dma_mapping_error(dev
, crq
->msg_token
))
4541 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
4542 crq
->msg_token
, PAGE_SIZE
);
4544 if (rc
== H_RESOURCE
)
4545 /* maybe kexecing and resource is busy. try a reset */
4546 retrc
= rc
= ibmvfc_reset_crq(vhost
);
4549 dev_warn(dev
, "Partner adapter not ready\n");
4551 dev_warn(dev
, "Error %d opening adapter\n", rc
);
4552 goto reg_crq_failed
;
4557 tasklet_init(&vhost
->tasklet
, (void *)ibmvfc_tasklet
, (unsigned long)vhost
);
4559 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
4560 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
4561 goto req_irq_failed
;
4564 if ((rc
= vio_enable_interrupts(vdev
))) {
4565 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
4566 goto req_irq_failed
;
4574 tasklet_kill(&vhost
->tasklet
);
4576 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
4577 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
4579 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4581 free_page((unsigned long)crq
->msgs
);
4586 * ibmvfc_free_mem - Free memory for vhost
4587 * @vhost: ibmvfc host struct
4592 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
4594 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4597 mempool_destroy(vhost
->tgt_pool
);
4598 kfree(vhost
->trace
);
4599 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4600 vhost
->disc_buf_dma
);
4601 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
4602 vhost
->login_buf
, vhost
->login_buf_dma
);
4603 dma_pool_destroy(vhost
->sg_pool
);
4604 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
4605 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4606 free_page((unsigned long)async_q
->msgs
);
4611 * ibmvfc_alloc_mem - Allocate memory for vhost
4612 * @vhost: ibmvfc host struct
4615 * 0 on success / non-zero on failure
4617 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
4619 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4620 struct device
*dev
= vhost
->dev
;
4623 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
4624 if (!async_q
->msgs
) {
4625 dev_err(dev
, "Couldn't allocate async queue.\n");
4629 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
4630 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
4631 async_q
->size
* sizeof(*async_q
->msgs
),
4634 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
4635 dev_err(dev
, "Failed to map async queue\n");
4636 goto free_async_crq
;
4639 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
4640 SG_ALL
* sizeof(struct srp_direct_buf
),
4641 sizeof(struct srp_direct_buf
), 0);
4643 if (!vhost
->sg_pool
) {
4644 dev_err(dev
, "Failed to allocate sg pool\n");
4645 goto unmap_async_crq
;
4648 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
4649 &vhost
->login_buf_dma
, GFP_KERNEL
);
4651 if (!vhost
->login_buf
) {
4652 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
4656 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
4657 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
4658 &vhost
->disc_buf_dma
, GFP_KERNEL
);
4660 if (!vhost
->disc_buf
) {
4661 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
4662 goto free_login_buffer
;
4665 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
4666 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
4669 goto free_disc_buffer
;
4671 vhost
->tgt_pool
= mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
4672 sizeof(struct ibmvfc_target
));
4674 if (!vhost
->tgt_pool
) {
4675 dev_err(dev
, "Couldn't allocate target memory pool\n");
4683 kfree(vhost
->trace
);
4685 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4686 vhost
->disc_buf_dma
);
4688 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
4689 vhost
->login_buf
, vhost
->login_buf_dma
);
4691 dma_pool_destroy(vhost
->sg_pool
);
4693 dma_unmap_single(dev
, async_q
->msg_token
,
4694 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4696 free_page((unsigned long)async_q
->msgs
);
4703 * ibmvfc_rport_add_thread - Worker thread for rport adds
4704 * @work: work struct
4707 static void ibmvfc_rport_add_thread(struct work_struct
*work
)
4709 struct ibmvfc_host
*vhost
= container_of(work
, struct ibmvfc_host
,
4711 struct ibmvfc_target
*tgt
;
4712 struct fc_rport
*rport
;
4713 unsigned long flags
;
4717 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4720 if (vhost
->state
!= IBMVFC_ACTIVE
)
4723 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4724 if (tgt
->add_rport
) {
4727 kref_get(&tgt
->kref
);
4730 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4731 ibmvfc_tgt_add_rport(tgt
);
4732 } else if (get_device(&rport
->dev
)) {
4733 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4734 tgt_dbg(tgt
, "Setting rport roles\n");
4735 fc_remote_port_rolechg(rport
, tgt
->ids
.roles
);
4736 put_device(&rport
->dev
);
4739 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4740 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4746 if (vhost
->state
== IBMVFC_ACTIVE
)
4747 vhost
->scan_complete
= 1;
4748 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4753 * ibmvfc_probe - Adapter hot plug add entry point
4754 * @vdev: vio device struct
4755 * @id: vio device id struct
4758 * 0 on success / non-zero on failure
4760 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
4762 struct ibmvfc_host
*vhost
;
4763 struct Scsi_Host
*shost
;
4764 struct device
*dev
= &vdev
->dev
;
4768 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
4770 dev_err(dev
, "Couldn't allocate host data\n");
4774 shost
->transportt
= ibmvfc_transport_template
;
4775 shost
->can_queue
= max_requests
;
4776 shost
->max_lun
= max_lun
;
4777 shost
->max_id
= max_targets
;
4778 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
4779 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
4780 shost
->unique_id
= shost
->host_no
;
4782 vhost
= shost_priv(shost
);
4783 INIT_LIST_HEAD(&vhost
->sent
);
4784 INIT_LIST_HEAD(&vhost
->free
);
4785 INIT_LIST_HEAD(&vhost
->targets
);
4786 sprintf(vhost
->name
, IBMVFC_NAME
);
4787 vhost
->host
= shost
;
4789 vhost
->partition_number
= -1;
4790 vhost
->log_level
= log_level
;
4791 vhost
->task_set
= 1;
4792 strcpy(vhost
->partition_name
, "UNKNOWN");
4793 init_waitqueue_head(&vhost
->work_wait_q
);
4794 init_waitqueue_head(&vhost
->init_wait_q
);
4795 INIT_WORK(&vhost
->rport_add_work_q
, ibmvfc_rport_add_thread
);
4796 mutex_init(&vhost
->passthru_mutex
);
4798 if ((rc
= ibmvfc_alloc_mem(vhost
)))
4799 goto free_scsi_host
;
4801 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
4804 if (IS_ERR(vhost
->work_thread
)) {
4805 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
4806 PTR_ERR(vhost
->work_thread
));
4810 if ((rc
= ibmvfc_init_crq(vhost
))) {
4811 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
4815 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
4816 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
4820 if ((rc
= scsi_add_host(shost
, dev
)))
4821 goto release_event_pool
;
4823 fc_host_dev_loss_tmo(shost
) = IBMVFC_DEV_LOSS_TMO
;
4825 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
4826 &ibmvfc_trace_attr
))) {
4827 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
4831 if (shost_to_fc_host(shost
)->rqst_q
)
4832 blk_queue_max_segments(shost_to_fc_host(shost
)->rqst_q
, 1);
4833 dev_set_drvdata(dev
, vhost
);
4834 spin_lock(&ibmvfc_driver_lock
);
4835 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4836 spin_unlock(&ibmvfc_driver_lock
);
4838 ibmvfc_send_crq_init(vhost
);
4839 scsi_scan_host(shost
);
4843 scsi_remove_host(shost
);
4845 ibmvfc_free_event_pool(vhost
);
4847 ibmvfc_release_crq_queue(vhost
);
4849 kthread_stop(vhost
->work_thread
);
4851 ibmvfc_free_mem(vhost
);
4853 scsi_host_put(shost
);
4860 * ibmvfc_remove - Adapter hot plug remove entry point
4861 * @vdev: vio device struct
4866 static int ibmvfc_remove(struct vio_dev
*vdev
)
4868 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4869 unsigned long flags
;
4872 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4874 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4875 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4876 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4878 ibmvfc_wait_while_resetting(vhost
);
4879 ibmvfc_release_crq_queue(vhost
);
4880 kthread_stop(vhost
->work_thread
);
4881 fc_remove_host(vhost
->host
);
4882 scsi_remove_host(vhost
->host
);
4884 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4885 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4886 ibmvfc_free_event_pool(vhost
);
4887 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4889 ibmvfc_free_mem(vhost
);
4890 spin_lock(&ibmvfc_driver_lock
);
4891 list_del(&vhost
->queue
);
4892 spin_unlock(&ibmvfc_driver_lock
);
4893 scsi_host_put(vhost
->host
);
4899 * ibmvfc_resume - Resume from suspend
4900 * @dev: device struct
4902 * We may have lost an interrupt across suspend/resume, so kick the
4906 static int ibmvfc_resume(struct device
*dev
)
4908 unsigned long flags
;
4909 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
4910 struct vio_dev
*vdev
= to_vio_dev(dev
);
4912 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4913 vio_disable_interrupts(vdev
);
4914 tasklet_schedule(&vhost
->tasklet
);
4915 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4920 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4921 * @vdev: vio device struct
4924 * Number of bytes the driver will need to DMA map at the same time in
4925 * order to perform well.
4927 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4929 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4930 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4933 static struct vio_device_id ibmvfc_device_table
[] = {
4934 {"fcp", "IBM,vfc-client"},
4937 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4939 static struct dev_pm_ops ibmvfc_pm_ops
= {
4940 .resume
= ibmvfc_resume
4943 static struct vio_driver ibmvfc_driver
= {
4944 .id_table
= ibmvfc_device_table
,
4945 .probe
= ibmvfc_probe
,
4946 .remove
= ibmvfc_remove
,
4947 .get_desired_dma
= ibmvfc_get_desired_dma
,
4948 .name
= IBMVFC_NAME
,
4949 .pm
= &ibmvfc_pm_ops
,
4952 static struct fc_function_template ibmvfc_transport_functions
= {
4953 .show_host_fabric_name
= 1,
4954 .show_host_node_name
= 1,
4955 .show_host_port_name
= 1,
4956 .show_host_supported_classes
= 1,
4957 .show_host_port_type
= 1,
4958 .show_host_port_id
= 1,
4959 .show_host_maxframe_size
= 1,
4961 .get_host_port_state
= ibmvfc_get_host_port_state
,
4962 .show_host_port_state
= 1,
4964 .get_host_speed
= ibmvfc_get_host_speed
,
4965 .show_host_speed
= 1,
4967 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4968 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4970 .show_rport_maxframe_size
= 1,
4971 .show_rport_supported_classes
= 1,
4973 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4974 .show_rport_dev_loss_tmo
= 1,
4976 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4977 .show_starget_node_name
= 1,
4979 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4980 .show_starget_port_name
= 1,
4982 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4983 .show_starget_port_id
= 1,
4985 .bsg_request
= ibmvfc_bsg_request
,
4986 .bsg_timeout
= ibmvfc_bsg_timeout
,
4990 * ibmvfc_module_init - Initialize the ibmvfc module
4993 * 0 on success / other on failure
4995 static int __init
ibmvfc_module_init(void)
4999 if (!firmware_has_feature(FW_FEATURE_VIO
))
5002 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
5003 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
5005 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
5006 if (!ibmvfc_transport_template
)
5009 rc
= vio_register_driver(&ibmvfc_driver
);
5011 fc_release_transport(ibmvfc_transport_template
);
5016 * ibmvfc_module_exit - Teardown the ibmvfc module
5021 static void __exit
ibmvfc_module_exit(void)
5023 vio_unregister_driver(&ibmvfc_driver
);
5024 fc_release_transport(ibmvfc_transport_template
);
5027 module_init(ibmvfc_module_init
);
5028 module_exit(ibmvfc_module_exit
);