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 <linux/bsg-lib.h>
36 #include <asm/firmware.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_cmnd.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_tcq.h>
44 #include <scsi/scsi_transport_fc.h>
45 #include <scsi/scsi_bsg_fc.h>
48 static unsigned int init_timeout
= IBMVFC_INIT_TIMEOUT
;
49 static unsigned int default_timeout
= IBMVFC_DEFAULT_TIMEOUT
;
50 static u64 max_lun
= IBMVFC_MAX_LUN
;
51 static unsigned int max_targets
= IBMVFC_MAX_TARGETS
;
52 static unsigned int max_requests
= IBMVFC_MAX_REQUESTS_DEFAULT
;
53 static unsigned int disc_threads
= IBMVFC_MAX_DISC_THREADS
;
54 static unsigned int ibmvfc_debug
= IBMVFC_DEBUG
;
55 static unsigned int log_level
= IBMVFC_DEFAULT_LOG_LEVEL
;
56 static unsigned int cls3_error
= IBMVFC_CLS3_ERROR
;
57 static LIST_HEAD(ibmvfc_head
);
58 static DEFINE_SPINLOCK(ibmvfc_driver_lock
);
59 static struct scsi_transport_template
*ibmvfc_transport_template
;
61 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
62 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
63 MODULE_LICENSE("GPL");
64 MODULE_VERSION(IBMVFC_DRIVER_VERSION
);
66 module_param_named(init_timeout
, init_timeout
, uint
, S_IRUGO
| S_IWUSR
);
67 MODULE_PARM_DESC(init_timeout
, "Initialization timeout in seconds. "
68 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT
) "]");
69 module_param_named(default_timeout
, default_timeout
, uint
, S_IRUGO
| S_IWUSR
);
70 MODULE_PARM_DESC(default_timeout
,
71 "Default timeout in seconds for initialization and EH commands. "
72 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT
) "]");
73 module_param_named(max_requests
, max_requests
, uint
, S_IRUGO
);
74 MODULE_PARM_DESC(max_requests
, "Maximum requests for this adapter. "
75 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT
) "]");
76 module_param_named(max_lun
, max_lun
, ullong
, S_IRUGO
);
77 MODULE_PARM_DESC(max_lun
, "Maximum allowed LUN. "
78 "[Default=" __stringify(IBMVFC_MAX_LUN
) "]");
79 module_param_named(max_targets
, max_targets
, uint
, S_IRUGO
);
80 MODULE_PARM_DESC(max_targets
, "Maximum allowed targets. "
81 "[Default=" __stringify(IBMVFC_MAX_TARGETS
) "]");
82 module_param_named(disc_threads
, disc_threads
, uint
, S_IRUGO
);
83 MODULE_PARM_DESC(disc_threads
, "Number of device discovery threads to use. "
84 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS
) "]");
85 module_param_named(debug
, ibmvfc_debug
, uint
, S_IRUGO
| S_IWUSR
);
86 MODULE_PARM_DESC(debug
, "Enable driver debug information. "
87 "[Default=" __stringify(IBMVFC_DEBUG
) "]");
88 module_param_named(log_level
, log_level
, uint
, 0);
89 MODULE_PARM_DESC(log_level
, "Set to 0 - 4 for increasing verbosity of device driver. "
90 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL
) "]");
91 module_param_named(cls3_error
, cls3_error
, uint
, 0);
92 MODULE_PARM_DESC(cls3_error
, "Enable FC Class 3 Error Recovery. "
93 "[Default=" __stringify(IBMVFC_CLS3_ERROR
) "]");
103 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_ESTABLISH
, DID_ERROR
, 1, 1, "unable to establish" },
104 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_FAULT
, DID_OK
, 1, 0, "transport fault" },
105 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CMD_TIMEOUT
, DID_TIME_OUT
, 1, 1, "command timeout" },
106 { IBMVFC_FABRIC_MAPPED
, IBMVFC_ENETDOWN
, DID_TRANSPORT_DISRUPTED
, 1, 1, "network down" },
107 { IBMVFC_FABRIC_MAPPED
, IBMVFC_HW_FAILURE
, DID_ERROR
, 1, 1, "hardware failure" },
108 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DOWN_ERR
, DID_REQUEUE
, 0, 0, "link down" },
109 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DEAD_ERR
, DID_ERROR
, 0, 0, "link dead" },
110 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_REGISTER
, DID_ERROR
, 1, 1, "unable to register" },
111 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_BUSY
, DID_BUS_BUSY
, 1, 0, "transport busy" },
112 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_DEAD
, DID_ERROR
, 0, 1, "transport dead" },
113 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CONFIG_ERROR
, DID_ERROR
, 1, 1, "configuration error" },
114 { IBMVFC_FABRIC_MAPPED
, IBMVFC_NAME_SERVER_FAIL
, DID_ERROR
, 1, 1, "name server failure" },
115 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_HALTED
, DID_REQUEUE
, 1, 0, "link halted" },
116 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_GENERAL
, DID_OK
, 1, 0, "general transport error" },
118 { IBMVFC_VIOS_FAILURE
, IBMVFC_CRQ_FAILURE
, DID_REQUEUE
, 1, 1, "CRQ failure" },
119 { IBMVFC_VIOS_FAILURE
, IBMVFC_SW_FAILURE
, DID_ERROR
, 0, 1, "software failure" },
120 { IBMVFC_VIOS_FAILURE
, IBMVFC_INVALID_PARAMETER
, DID_ERROR
, 0, 1, "invalid parameter" },
121 { IBMVFC_VIOS_FAILURE
, IBMVFC_MISSING_PARAMETER
, DID_ERROR
, 0, 1, "missing parameter" },
122 { IBMVFC_VIOS_FAILURE
, IBMVFC_HOST_IO_BUS
, DID_ERROR
, 1, 1, "host I/O bus failure" },
123 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED
, DID_ERROR
, 0, 1, "transaction cancelled" },
124 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED_IMPLICIT
, DID_ERROR
, 0, 1, "transaction cancelled implicit" },
125 { IBMVFC_VIOS_FAILURE
, IBMVFC_INSUFFICIENT_RESOURCE
, DID_REQUEUE
, 1, 1, "insufficient resources" },
126 { IBMVFC_VIOS_FAILURE
, IBMVFC_PLOGI_REQUIRED
, DID_ERROR
, 0, 1, "port login required" },
127 { IBMVFC_VIOS_FAILURE
, IBMVFC_COMMAND_FAILED
, DID_ERROR
, 1, 1, "command failed" },
129 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_ELS_CMD_CODE
, DID_ERROR
, 0, 1, "invalid ELS command code" },
130 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_VERSION
, DID_ERROR
, 0, 1, "invalid version level" },
131 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_ERROR
, DID_ERROR
, 1, 1, "logical error" },
132 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_CT_IU_SIZE
, DID_ERROR
, 0, 1, "invalid CT_IU size" },
133 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_BUSY
, DID_REQUEUE
, 1, 0, "logical busy" },
134 { IBMVFC_FC_FAILURE
, IBMVFC_PROTOCOL_ERROR
, DID_ERROR
, 1, 1, "protocol error" },
135 { IBMVFC_FC_FAILURE
, IBMVFC_UNABLE_TO_PERFORM_REQ
, DID_ERROR
, 1, 1, "unable to perform request" },
136 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_NOT_SUPPORTED
, DID_ERROR
, 0, 0, "command not supported" },
137 { IBMVFC_FC_FAILURE
, IBMVFC_SERVER_NOT_AVAIL
, DID_ERROR
, 0, 1, "server not available" },
138 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_IN_PROGRESS
, DID_ERROR
, 0, 1, "command already in progress" },
139 { IBMVFC_FC_FAILURE
, IBMVFC_VENDOR_SPECIFIC
, DID_ERROR
, 1, 1, "vendor specific" },
141 { IBMVFC_FC_SCSI_ERROR
, 0, DID_OK
, 1, 0, "SCSI error" },
144 static void ibmvfc_npiv_login(struct ibmvfc_host
*);
145 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*);
146 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*);
147 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*);
148 static void ibmvfc_npiv_logout(struct ibmvfc_host
*);
150 static const char *unknown_error
= "unknown error";
152 #ifdef CONFIG_SCSI_IBMVFC_TRACE
154 * ibmvfc_trc_start - Log a start trace entry
155 * @evt: ibmvfc event struct
158 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
160 struct ibmvfc_host
*vhost
= evt
->vhost
;
161 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
162 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
163 struct ibmvfc_trace_entry
*entry
;
165 entry
= &vhost
->trace
[vhost
->trace_index
++];
167 entry
->time
= jiffies
;
168 entry
->fmt
= evt
->crq
.format
;
169 entry
->type
= IBMVFC_TRC_START
;
171 switch (entry
->fmt
) {
172 case IBMVFC_CMD_FORMAT
:
173 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
174 entry
->scsi_id
= be64_to_cpu(vfc_cmd
->tgt_scsi_id
);
175 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
176 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
177 entry
->u
.start
.xfer_len
= be32_to_cpu(vfc_cmd
->iu
.xfer_len
);
179 case IBMVFC_MAD_FORMAT
:
180 entry
->op_code
= be32_to_cpu(mad
->opcode
);
188 * ibmvfc_trc_end - Log an end trace entry
189 * @evt: ibmvfc event struct
192 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
194 struct ibmvfc_host
*vhost
= evt
->vhost
;
195 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
196 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
197 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
200 entry
->time
= jiffies
;
201 entry
->fmt
= evt
->crq
.format
;
202 entry
->type
= IBMVFC_TRC_END
;
204 switch (entry
->fmt
) {
205 case IBMVFC_CMD_FORMAT
:
206 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
207 entry
->scsi_id
= be64_to_cpu(vfc_cmd
->tgt_scsi_id
);
208 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
209 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
210 entry
->u
.end
.status
= be16_to_cpu(vfc_cmd
->status
);
211 entry
->u
.end
.error
= be16_to_cpu(vfc_cmd
->error
);
212 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
213 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
214 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
216 case IBMVFC_MAD_FORMAT
:
217 entry
->op_code
= be32_to_cpu(mad
->opcode
);
218 entry
->u
.end
.status
= be16_to_cpu(mad
->status
);
227 #define ibmvfc_trc_start(evt) do { } while (0)
228 #define ibmvfc_trc_end(evt) do { } while (0)
232 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
233 * @status: status / error class
237 * index into cmd_status / -EINVAL on failure
239 static int ibmvfc_get_err_index(u16 status
, u16 error
)
243 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
244 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
245 cmd_status
[i
].error
== error
)
252 * ibmvfc_get_cmd_error - Find the error description for the fcp response
253 * @status: status / error class
257 * error description string
259 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
261 int rc
= ibmvfc_get_err_index(status
, error
);
263 return cmd_status
[rc
].name
;
264 return unknown_error
;
268 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
269 * @vfc_cmd: ibmvfc command struct
272 * SCSI result value to return for completed command
274 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
277 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
278 int fc_rsp_len
= be32_to_cpu(rsp
->fcp_rsp_len
);
280 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
281 ((fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
282 rsp
->data
.info
.rsp_code
))
283 return DID_ERROR
<< 16;
285 err
= ibmvfc_get_err_index(be16_to_cpu(vfc_cmd
->status
), be16_to_cpu(vfc_cmd
->error
));
287 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
288 return rsp
->scsi_status
| (DID_ERROR
<< 16);
292 * ibmvfc_retry_cmd - Determine if error status is retryable
293 * @status: status / error class
297 * 1 if error should be retried / 0 if it should not
299 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
301 int rc
= ibmvfc_get_err_index(status
, error
);
304 return cmd_status
[rc
].retry
;
308 static const char *unknown_fc_explain
= "unknown fc explain";
310 static const struct {
314 { 0x00, "no additional explanation" },
315 { 0x01, "service parameter error - options" },
316 { 0x03, "service parameter error - initiator control" },
317 { 0x05, "service parameter error - recipient control" },
318 { 0x07, "service parameter error - received data field size" },
319 { 0x09, "service parameter error - concurrent seq" },
320 { 0x0B, "service parameter error - credit" },
321 { 0x0D, "invalid N_Port/F_Port_Name" },
322 { 0x0E, "invalid node/Fabric Name" },
323 { 0x0F, "invalid common service parameters" },
324 { 0x11, "invalid association header" },
325 { 0x13, "association header required" },
326 { 0x15, "invalid originator S_ID" },
327 { 0x17, "invalid OX_ID-RX-ID combination" },
328 { 0x19, "command (request) already in progress" },
329 { 0x1E, "N_Port Login requested" },
330 { 0x1F, "Invalid N_Port_ID" },
333 static const struct {
337 { 0x00, "no additional explanation" },
338 { 0x01, "port identifier not registered" },
339 { 0x02, "port name not registered" },
340 { 0x03, "node name not registered" },
341 { 0x04, "class of service not registered" },
342 { 0x06, "initial process associator not registered" },
343 { 0x07, "FC-4 TYPEs not registered" },
344 { 0x08, "symbolic port name not registered" },
345 { 0x09, "symbolic node name not registered" },
346 { 0x0A, "port type not registered" },
347 { 0xF0, "authorization exception" },
348 { 0xF1, "authentication exception" },
349 { 0xF2, "data base full" },
350 { 0xF3, "data base empty" },
351 { 0xF4, "processing request" },
352 { 0xF5, "unable to verify connection" },
353 { 0xF6, "devices not in a common zone" },
357 * ibmvfc_get_ls_explain - Return the FC Explain description text
358 * @status: FC Explain status
363 static const char *ibmvfc_get_ls_explain(u16 status
)
367 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
368 if (ls_explain
[i
].fc_explain
== status
)
369 return ls_explain
[i
].name
;
371 return unknown_fc_explain
;
375 * ibmvfc_get_gs_explain - Return the FC Explain description text
376 * @status: FC Explain status
381 static const char *ibmvfc_get_gs_explain(u16 status
)
385 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
386 if (gs_explain
[i
].fc_explain
== status
)
387 return gs_explain
[i
].name
;
389 return unknown_fc_explain
;
392 static const struct {
393 enum ibmvfc_fc_type fc_type
;
396 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
397 { IBMVFC_PORT_REJECT
, "port reject" },
398 { IBMVFC_LS_REJECT
, "ELS reject" },
399 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
400 { IBMVFC_PORT_BUSY
, "port busy" },
401 { IBMVFC_BASIC_REJECT
, "basic reject" },
404 static const char *unknown_fc_type
= "unknown fc type";
407 * ibmvfc_get_fc_type - Return the FC Type description text
408 * @status: FC Type error status
413 static const char *ibmvfc_get_fc_type(u16 status
)
417 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
418 if (fc_type
[i
].fc_type
== status
)
419 return fc_type
[i
].name
;
421 return unknown_fc_type
;
425 * ibmvfc_set_tgt_action - Set the next init action for the target
426 * @tgt: ibmvfc target struct
427 * @action: action to perform
430 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
431 enum ibmvfc_target_action action
)
433 switch (tgt
->action
) {
434 case IBMVFC_TGT_ACTION_DEL_RPORT
:
435 if (action
== IBMVFC_TGT_ACTION_DELETED_RPORT
)
436 tgt
->action
= action
;
437 case IBMVFC_TGT_ACTION_DELETED_RPORT
:
440 if (action
== IBMVFC_TGT_ACTION_DEL_RPORT
)
442 tgt
->action
= action
;
448 * ibmvfc_set_host_state - Set the state for the host
449 * @vhost: ibmvfc host struct
450 * @state: state to set host to
453 * 0 if state changed / non-zero if not changed
455 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
456 enum ibmvfc_host_state state
)
460 switch (vhost
->state
) {
461 case IBMVFC_HOST_OFFLINE
:
465 vhost
->state
= state
;
473 * ibmvfc_set_host_action - Set the next init action for the host
474 * @vhost: ibmvfc host struct
475 * @action: action to perform
478 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
479 enum ibmvfc_host_action action
)
482 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
483 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
484 vhost
->action
= action
;
486 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
487 if (vhost
->action
== IBMVFC_HOST_ACTION_LOGO
)
488 vhost
->action
= action
;
490 case IBMVFC_HOST_ACTION_INIT_WAIT
:
491 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
492 vhost
->action
= action
;
494 case IBMVFC_HOST_ACTION_QUERY
:
495 switch (vhost
->action
) {
496 case IBMVFC_HOST_ACTION_INIT_WAIT
:
497 case IBMVFC_HOST_ACTION_NONE
:
498 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
499 vhost
->action
= action
;
505 case IBMVFC_HOST_ACTION_TGT_INIT
:
506 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
507 vhost
->action
= action
;
509 case IBMVFC_HOST_ACTION_INIT
:
510 case IBMVFC_HOST_ACTION_TGT_DEL
:
511 switch (vhost
->action
) {
512 case IBMVFC_HOST_ACTION_RESET
:
513 case IBMVFC_HOST_ACTION_REENABLE
:
516 vhost
->action
= action
;
520 case IBMVFC_HOST_ACTION_LOGO
:
521 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
522 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
523 case IBMVFC_HOST_ACTION_NONE
:
524 case IBMVFC_HOST_ACTION_RESET
:
525 case IBMVFC_HOST_ACTION_REENABLE
:
527 vhost
->action
= action
;
533 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
534 * @vhost: ibmvfc host struct
539 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
541 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
542 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
543 scsi_block_requests(vhost
->host
);
544 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
549 wake_up(&vhost
->work_wait_q
);
553 * ibmvfc_link_down - Handle a link down event from the adapter
554 * @vhost: ibmvfc host struct
555 * @state: ibmvfc host state to enter
558 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
559 enum ibmvfc_host_state state
)
561 struct ibmvfc_target
*tgt
;
564 scsi_block_requests(vhost
->host
);
565 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
566 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
567 ibmvfc_set_host_state(vhost
, state
);
568 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
569 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
570 wake_up(&vhost
->work_wait_q
);
575 * ibmvfc_init_host - Start host initialization
576 * @vhost: ibmvfc host struct
581 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
)
583 struct ibmvfc_target
*tgt
;
585 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
586 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
588 "Host initialization retries exceeded. Taking adapter offline\n");
589 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
594 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
595 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
596 vhost
->async_crq
.cur
= 0;
598 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
599 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
600 scsi_block_requests(vhost
->host
);
601 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
602 vhost
->job_step
= ibmvfc_npiv_login
;
603 wake_up(&vhost
->work_wait_q
);
608 * ibmvfc_send_crq - Send a CRQ
609 * @vhost: ibmvfc host struct
610 * @word1: the first 64 bits of the data
611 * @word2: the second 64 bits of the data
614 * 0 on success / other on failure
616 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
618 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
619 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
623 * ibmvfc_send_crq_init - Send a CRQ init message
624 * @vhost: ibmvfc host struct
627 * 0 on success / other on failure
629 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
631 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
632 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
636 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
637 * @vhost: ibmvfc host struct
640 * 0 on success / other on failure
642 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
644 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
645 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
649 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
650 * @vhost: ibmvfc host struct
652 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
653 * the crq with the hypervisor.
655 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
658 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
659 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
661 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
662 free_irq(vdev
->irq
, vhost
);
663 tasklet_kill(&vhost
->tasklet
);
667 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
668 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
670 vhost
->state
= IBMVFC_NO_CRQ
;
671 vhost
->logged_in
= 0;
672 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
673 free_page((unsigned long)crq
->msgs
);
677 * ibmvfc_reenable_crq_queue - reenables the CRQ
678 * @vhost: ibmvfc host struct
681 * 0 on success / other on failure
683 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
686 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
688 /* Re-enable the CRQ */
692 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
693 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
696 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
702 * ibmvfc_reset_crq - resets a crq after a failure
703 * @vhost: ibmvfc host struct
706 * 0 on success / other on failure
708 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
712 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
713 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
719 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
720 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
722 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
723 vhost
->state
= IBMVFC_NO_CRQ
;
724 vhost
->logged_in
= 0;
726 /* Clean out the queue */
727 memset(crq
->msgs
, 0, PAGE_SIZE
);
730 /* And re-open it again */
731 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
732 crq
->msg_token
, PAGE_SIZE
);
735 /* Adapter is good, but other end is not ready */
736 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
738 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
739 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
745 * ibmvfc_valid_event - Determines if event is valid.
746 * @pool: event_pool that contains the event
747 * @evt: ibmvfc event to be checked for validity
750 * 1 if event is valid / 0 if event is not valid
752 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
753 struct ibmvfc_event
*evt
)
755 int index
= evt
- pool
->events
;
756 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
758 if (evt
!= pool
->events
+ index
) /* unaligned */
764 * ibmvfc_free_event - Free the specified event
765 * @evt: ibmvfc_event to be freed
768 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
770 struct ibmvfc_host
*vhost
= evt
->vhost
;
771 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
773 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
774 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
775 list_add_tail(&evt
->queue
, &vhost
->free
);
779 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
780 * @evt: ibmvfc event struct
782 * This function does not setup any error status, that must be done
783 * before this function gets called.
785 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
787 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
790 scsi_dma_unmap(cmnd
);
791 cmnd
->scsi_done(cmnd
);
795 complete(evt
->eh_comp
);
797 ibmvfc_free_event(evt
);
801 * ibmvfc_fail_request - Fail request with specified error code
802 * @evt: ibmvfc event struct
803 * @error_code: error code to fail request with
808 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
811 evt
->cmnd
->result
= (error_code
<< 16);
812 evt
->done
= ibmvfc_scsi_eh_done
;
814 evt
->xfer_iu
->mad_common
.status
= cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED
);
816 list_del(&evt
->queue
);
817 del_timer(&evt
->timer
);
823 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
824 * @vhost: ibmvfc host struct
825 * @error_code: error code to fail requests with
830 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
832 struct ibmvfc_event
*evt
, *pos
;
834 ibmvfc_dbg(vhost
, "Purging all requests\n");
835 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
836 ibmvfc_fail_request(evt
, error_code
);
840 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
841 * @vhost: struct ibmvfc host to reset
843 static void ibmvfc_hard_reset_host(struct ibmvfc_host
*vhost
)
845 ibmvfc_purge_requests(vhost
, DID_ERROR
);
846 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
847 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_RESET
);
851 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
852 * @vhost: struct ibmvfc host to reset
854 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
856 if (vhost
->logged_in
&& vhost
->action
!= IBMVFC_HOST_ACTION_LOGO_WAIT
&&
857 !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
858 scsi_block_requests(vhost
->host
);
859 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO
);
860 vhost
->job_step
= ibmvfc_npiv_logout
;
861 wake_up(&vhost
->work_wait_q
);
863 ibmvfc_hard_reset_host(vhost
);
867 * ibmvfc_reset_host - Reset the connection to the server
868 * @vhost: ibmvfc host struct
870 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
874 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
875 __ibmvfc_reset_host(vhost
);
876 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
880 * ibmvfc_retry_host_init - Retry host initialization if allowed
881 * @vhost: ibmvfc host struct
883 * Returns: 1 if init will be retried / 0 if not
886 static int ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
890 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
891 vhost
->delay_init
= 1;
892 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
894 "Host initialization retries exceeded. Taking adapter offline\n");
895 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
896 } else if (vhost
->init_retries
== IBMVFC_MAX_HOST_INIT_RETRIES
)
897 __ibmvfc_reset_host(vhost
);
899 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
904 wake_up(&vhost
->work_wait_q
);
909 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
910 * @starget: scsi target struct
913 * ibmvfc_target struct / NULL if not found
915 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
917 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
918 struct ibmvfc_host
*vhost
= shost_priv(shost
);
919 struct ibmvfc_target
*tgt
;
921 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
922 if (tgt
->target_id
== starget
->id
) {
923 kref_get(&tgt
->kref
);
930 * ibmvfc_get_target - Find the specified scsi_target
931 * @starget: scsi target struct
934 * ibmvfc_target struct / NULL if not found
936 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
938 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
939 struct ibmvfc_target
*tgt
;
942 spin_lock_irqsave(shost
->host_lock
, flags
);
943 tgt
= __ibmvfc_get_target(starget
);
944 spin_unlock_irqrestore(shost
->host_lock
, flags
);
949 * ibmvfc_get_host_speed - Get host port speed
950 * @shost: scsi host struct
955 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
957 struct ibmvfc_host
*vhost
= shost_priv(shost
);
960 spin_lock_irqsave(shost
->host_lock
, flags
);
961 if (vhost
->state
== IBMVFC_ACTIVE
) {
962 switch (be64_to_cpu(vhost
->login_buf
->resp
.link_speed
) / 100) {
964 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
967 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
970 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
973 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
976 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
979 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
982 ibmvfc_log(vhost
, 3, "Unknown port speed: %lld Gbit\n",
983 be64_to_cpu(vhost
->login_buf
->resp
.link_speed
) / 100);
984 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
988 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
989 spin_unlock_irqrestore(shost
->host_lock
, flags
);
993 * ibmvfc_get_host_port_state - Get host port state
994 * @shost: scsi host struct
999 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
1001 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1002 unsigned long flags
;
1004 spin_lock_irqsave(shost
->host_lock
, flags
);
1005 switch (vhost
->state
) {
1006 case IBMVFC_INITIALIZING
:
1008 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
1010 case IBMVFC_LINK_DOWN
:
1011 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
1013 case IBMVFC_LINK_DEAD
:
1014 case IBMVFC_HOST_OFFLINE
:
1015 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
1018 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
1021 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1024 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
1025 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1028 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1032 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1033 * @rport: rport struct
1034 * @timeout: timeout value
1039 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
1042 rport
->dev_loss_tmo
= timeout
;
1044 rport
->dev_loss_tmo
= 1;
1048 * ibmvfc_release_tgt - Free memory allocated for a target
1049 * @kref: kref struct
1052 static void ibmvfc_release_tgt(struct kref
*kref
)
1054 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1059 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1060 * @starget: scsi target struct
1065 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1067 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1068 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1070 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1074 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1075 * @starget: scsi target struct
1080 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1082 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1083 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1085 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1089 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1090 * @starget: scsi target struct
1095 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1097 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1098 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1100 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1104 * ibmvfc_wait_while_resetting - Wait while the host resets
1105 * @vhost: ibmvfc host struct
1108 * 0 on success / other on failure
1110 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1112 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1113 ((vhost
->state
== IBMVFC_ACTIVE
||
1114 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1115 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1116 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1117 (init_timeout
* HZ
));
1119 return timeout
? 0 : -EIO
;
1123 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1124 * @shost: scsi host struct
1127 * 0 on success / other on failure
1129 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1131 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1133 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1134 ibmvfc_reset_host(vhost
);
1135 return ibmvfc_wait_while_resetting(vhost
);
1139 * ibmvfc_gather_partition_info - Gather info about the LPAR
1144 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1146 struct device_node
*rootdn
;
1148 const unsigned int *num
;
1150 rootdn
= of_find_node_by_path("/");
1154 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1156 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1157 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1159 vhost
->partition_number
= *num
;
1160 of_node_put(rootdn
);
1164 * ibmvfc_set_login_info - Setup info for NPIV login
1165 * @vhost: ibmvfc host struct
1170 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1172 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1173 struct device_node
*of_node
= vhost
->dev
->of_node
;
1174 const char *location
;
1176 memset(login_info
, 0, sizeof(*login_info
));
1178 login_info
->ostype
= cpu_to_be32(IBMVFC_OS_LINUX
);
1179 login_info
->max_dma_len
= cpu_to_be64(IBMVFC_MAX_SECTORS
<< 9);
1180 login_info
->max_payload
= cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu
));
1181 login_info
->max_response
= cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp
));
1182 login_info
->partition_num
= cpu_to_be32(vhost
->partition_number
);
1183 login_info
->vfc_frame_version
= cpu_to_be32(1);
1184 login_info
->fcp_version
= cpu_to_be16(3);
1185 login_info
->flags
= cpu_to_be16(IBMVFC_FLUSH_ON_HALT
);
1186 if (vhost
->client_migrated
)
1187 login_info
->flags
|= cpu_to_be16(IBMVFC_CLIENT_MIGRATED
);
1189 login_info
->max_cmds
= cpu_to_be32(max_requests
+ IBMVFC_NUM_INTERNAL_REQ
);
1190 login_info
->capabilities
= cpu_to_be64(IBMVFC_CAN_MIGRATE
);
1191 login_info
->async
.va
= cpu_to_be64(vhost
->async_crq
.msg_token
);
1192 login_info
->async
.len
= cpu_to_be32(vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
));
1193 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1194 strncpy(login_info
->device_name
,
1195 dev_name(&vhost
->host
->shost_gendev
), IBMVFC_MAX_NAME
);
1197 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1198 location
= location
? location
: dev_name(vhost
->dev
);
1199 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1203 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1204 * @vhost: ibmvfc host who owns the event pool
1206 * Returns zero on success.
1208 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1211 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1214 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1215 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1219 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1220 pool
->size
* sizeof(*pool
->iu_storage
),
1221 &pool
->iu_token
, 0);
1223 if (!pool
->iu_storage
) {
1224 kfree(pool
->events
);
1228 for (i
= 0; i
< pool
->size
; ++i
) {
1229 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1230 atomic_set(&evt
->free
, 1);
1231 evt
->crq
.valid
= 0x80;
1232 evt
->crq
.ioba
= cpu_to_be64(pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
));
1233 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1235 evt
->ext_list
= NULL
;
1236 list_add_tail(&evt
->queue
, &vhost
->free
);
1244 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1245 * @vhost: ibmvfc host who owns the event pool
1248 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1251 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1254 for (i
= 0; i
< pool
->size
; ++i
) {
1255 list_del(&pool
->events
[i
].queue
);
1256 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1257 if (pool
->events
[i
].ext_list
)
1258 dma_pool_free(vhost
->sg_pool
,
1259 pool
->events
[i
].ext_list
,
1260 pool
->events
[i
].ext_list_token
);
1263 kfree(pool
->events
);
1264 dma_free_coherent(vhost
->dev
,
1265 pool
->size
* sizeof(*pool
->iu_storage
),
1266 pool
->iu_storage
, pool
->iu_token
);
1271 * ibmvfc_get_event - Gets the next free event in pool
1272 * @vhost: ibmvfc host struct
1274 * Returns a free event from the pool.
1276 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1278 struct ibmvfc_event
*evt
;
1280 BUG_ON(list_empty(&vhost
->free
));
1281 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1282 atomic_set(&evt
->free
, 0);
1283 list_del(&evt
->queue
);
1288 * ibmvfc_init_event - Initialize fields in an event struct that are always
1291 * @done: Routine to call when the event is responded to
1292 * @format: SRP or MAD format
1294 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1295 void (*done
) (struct ibmvfc_event
*), u8 format
)
1298 evt
->sync_iu
= NULL
;
1299 evt
->crq
.format
= format
;
1301 evt
->eh_comp
= NULL
;
1305 * ibmvfc_map_sg_list - Initialize scatterlist
1306 * @scmd: scsi command struct
1307 * @nseg: number of scatterlist segments
1308 * @md: memory descriptor list to initialize
1310 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1311 struct srp_direct_buf
*md
)
1314 struct scatterlist
*sg
;
1316 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1317 md
[i
].va
= cpu_to_be64(sg_dma_address(sg
));
1318 md
[i
].len
= cpu_to_be32(sg_dma_len(sg
));
1324 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1325 * @scmd: Scsi_Cmnd with the scatterlist
1326 * @evt: ibmvfc event struct
1327 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1328 * @dev: device for which to map dma memory
1331 * 0 on success / non-zero on failure
1333 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1334 struct ibmvfc_event
*evt
,
1335 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1339 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1340 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1343 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_CLASS_3_ERR
);
1345 sg_mapped
= scsi_dma_map(scmd
);
1347 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_NO_MEM_DESC
);
1349 } else if (unlikely(sg_mapped
< 0)) {
1350 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1351 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1355 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1356 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_WRITE
);
1357 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1359 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_READ
);
1360 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1363 if (sg_mapped
== 1) {
1364 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1368 vfc_cmd
->flags
|= cpu_to_be16(IBMVFC_SCATTERLIST
);
1370 if (!evt
->ext_list
) {
1371 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1372 &evt
->ext_list_token
);
1374 if (!evt
->ext_list
) {
1375 scsi_dma_unmap(scmd
);
1376 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1377 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1382 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1384 data
->va
= cpu_to_be64(evt
->ext_list_token
);
1385 data
->len
= cpu_to_be32(sg_mapped
* sizeof(struct srp_direct_buf
));
1391 * ibmvfc_timeout - Internal command timeout handler
1392 * @evt: struct ibmvfc_event that timed out
1394 * Called when an internally generated command times out
1396 static void ibmvfc_timeout(struct timer_list
*t
)
1398 struct ibmvfc_event
*evt
= from_timer(evt
, t
, timer
);
1399 struct ibmvfc_host
*vhost
= evt
->vhost
;
1400 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1401 ibmvfc_reset_host(vhost
);
1405 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1406 * @evt: event to be sent
1407 * @vhost: ibmvfc host struct
1408 * @timeout: timeout in seconds - 0 means do not time command
1410 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1412 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1413 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1415 __be64
*crq_as_u64
= (__be64
*) &evt
->crq
;
1418 /* Copy the IU into the transfer area */
1419 *evt
->xfer_iu
= evt
->iu
;
1420 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1421 evt
->xfer_iu
->cmd
.tag
= cpu_to_be64((u64
)evt
);
1422 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1423 evt
->xfer_iu
->mad_common
.tag
= cpu_to_be64((u64
)evt
);
1427 list_add_tail(&evt
->queue
, &vhost
->sent
);
1428 timer_setup(&evt
->timer
, ibmvfc_timeout
, 0);
1431 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1432 add_timer(&evt
->timer
);
1437 if ((rc
= ibmvfc_send_crq(vhost
, be64_to_cpu(crq_as_u64
[0]),
1438 be64_to_cpu(crq_as_u64
[1])))) {
1439 list_del(&evt
->queue
);
1440 del_timer(&evt
->timer
);
1442 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1443 * Firmware will send a CRQ with a transport event (0xFF) to
1444 * tell this client what has happened to the transport. This
1445 * will be handled in ibmvfc_handle_crq()
1447 if (rc
== H_CLOSED
) {
1448 if (printk_ratelimit())
1449 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1451 scsi_dma_unmap(evt
->cmnd
);
1452 ibmvfc_free_event(evt
);
1453 return SCSI_MLQUEUE_HOST_BUSY
;
1456 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1458 evt
->cmnd
->result
= DID_ERROR
<< 16;
1459 evt
->done
= ibmvfc_scsi_eh_done
;
1461 evt
->xfer_iu
->mad_common
.status
= cpu_to_be16(IBMVFC_MAD_CRQ_ERROR
);
1465 ibmvfc_trc_start(evt
);
1471 * ibmvfc_log_error - Log an error for the failed command if appropriate
1472 * @evt: ibmvfc event to log
1475 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1477 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1478 struct ibmvfc_host
*vhost
= evt
->vhost
;
1479 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1480 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1481 const char *err
= unknown_error
;
1482 int index
= ibmvfc_get_err_index(be16_to_cpu(vfc_cmd
->status
), be16_to_cpu(vfc_cmd
->error
));
1487 logerr
= cmd_status
[index
].log
;
1488 err
= cmd_status
[index
].name
;
1491 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1494 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1495 rsp_code
= rsp
->data
.info
.rsp_code
;
1497 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1498 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1499 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1500 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1504 * ibmvfc_relogin - Log back into the specified device
1505 * @sdev: scsi device struct
1508 static void ibmvfc_relogin(struct scsi_device
*sdev
)
1510 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1511 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1512 struct ibmvfc_target
*tgt
;
1514 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1515 if (rport
== tgt
->rport
) {
1516 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
1521 ibmvfc_reinit_host(vhost
);
1525 * ibmvfc_scsi_done - Handle responses from commands
1526 * @evt: ibmvfc event to be handled
1528 * Used as a callback when sending scsi cmds.
1530 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1532 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1533 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1534 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1536 u32 sense_len
= be32_to_cpu(rsp
->fcp_sense_len
);
1539 if (be16_to_cpu(vfc_cmd
->response_flags
) & IBMVFC_ADAPTER_RESID_VALID
)
1540 scsi_set_resid(cmnd
, be32_to_cpu(vfc_cmd
->adapter_resid
));
1541 else if (rsp
->flags
& FCP_RESID_UNDER
)
1542 scsi_set_resid(cmnd
, be32_to_cpu(rsp
->fcp_resid
));
1544 scsi_set_resid(cmnd
, 0);
1546 if (vfc_cmd
->status
) {
1547 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1549 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1550 rsp_len
= be32_to_cpu(rsp
->fcp_rsp_len
);
1551 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1552 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1553 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1554 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1555 if ((be16_to_cpu(vfc_cmd
->status
) & IBMVFC_VIOS_FAILURE
) &&
1556 (be16_to_cpu(vfc_cmd
->error
) == IBMVFC_PLOGI_REQUIRED
))
1557 ibmvfc_relogin(cmnd
->device
);
1559 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1560 cmnd
->result
= (DID_ERROR
<< 16);
1562 ibmvfc_log_error(evt
);
1565 if (!cmnd
->result
&&
1566 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1567 cmnd
->result
= (DID_ERROR
<< 16);
1569 scsi_dma_unmap(cmnd
);
1570 cmnd
->scsi_done(cmnd
);
1574 complete(evt
->eh_comp
);
1576 ibmvfc_free_event(evt
);
1580 * ibmvfc_host_chkready - Check if the host can accept commands
1581 * @vhost: struct ibmvfc host
1584 * 1 if host can accept command / 0 if not
1586 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1590 switch (vhost
->state
) {
1591 case IBMVFC_LINK_DEAD
:
1592 case IBMVFC_HOST_OFFLINE
:
1593 result
= DID_NO_CONNECT
<< 16;
1596 case IBMVFC_INITIALIZING
:
1598 case IBMVFC_LINK_DOWN
:
1599 result
= DID_REQUEUE
<< 16;
1610 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1611 * @cmnd: struct scsi_cmnd to be executed
1612 * @done: Callback function to be called when cmnd is completed
1615 * 0 on success / other on failure
1617 static int ibmvfc_queuecommand_lck(struct scsi_cmnd
*cmnd
,
1618 void (*done
) (struct scsi_cmnd
*))
1620 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1621 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1622 struct ibmvfc_cmd
*vfc_cmd
;
1623 struct ibmvfc_event
*evt
;
1626 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1627 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1633 cmnd
->result
= (DID_OK
<< 16);
1634 evt
= ibmvfc_get_event(vhost
);
1635 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1637 cmnd
->scsi_done
= done
;
1638 vfc_cmd
= &evt
->iu
.cmd
;
1639 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1640 vfc_cmd
->resp
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) + offsetof(struct ibmvfc_cmd
, rsp
));
1641 vfc_cmd
->resp
.len
= cpu_to_be32(sizeof(vfc_cmd
->rsp
));
1642 vfc_cmd
->frame_type
= cpu_to_be32(IBMVFC_SCSI_FCP_TYPE
);
1643 vfc_cmd
->payload_len
= cpu_to_be32(sizeof(vfc_cmd
->iu
));
1644 vfc_cmd
->resp_len
= cpu_to_be32(sizeof(vfc_cmd
->rsp
));
1645 vfc_cmd
->cancel_key
= cpu_to_be32((unsigned long)cmnd
->device
->hostdata
);
1646 vfc_cmd
->tgt_scsi_id
= cpu_to_be64(rport
->port_id
);
1647 vfc_cmd
->iu
.xfer_len
= cpu_to_be32(scsi_bufflen(cmnd
));
1648 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1649 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1651 if (cmnd
->flags
& SCMD_TAGGED
) {
1652 vfc_cmd
->task_tag
= cpu_to_be64(cmnd
->tag
);
1653 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1656 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1657 return ibmvfc_send_event(evt
, vhost
, 0);
1659 ibmvfc_free_event(evt
);
1661 return SCSI_MLQUEUE_HOST_BUSY
;
1663 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1664 scmd_printk(KERN_ERR
, cmnd
,
1665 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1667 cmnd
->result
= DID_ERROR
<< 16;
1672 static DEF_SCSI_QCMD(ibmvfc_queuecommand
)
1675 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1676 * @evt: ibmvfc event struct
1679 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1681 /* copy the response back */
1683 *evt
->sync_iu
= *evt
->xfer_iu
;
1685 complete(&evt
->comp
);
1689 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1690 * @evt: struct ibmvfc_event
1693 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event
*evt
)
1695 struct ibmvfc_host
*vhost
= evt
->vhost
;
1697 ibmvfc_free_event(evt
);
1698 vhost
->aborting_passthru
= 0;
1699 dev_info(vhost
->dev
, "Passthru command cancelled\n");
1703 * ibmvfc_bsg_timeout - Handle a BSG timeout
1704 * @job: struct bsg_job that timed out
1707 * 0 on success / other on failure
1709 static int ibmvfc_bsg_timeout(struct bsg_job
*job
)
1711 struct ibmvfc_host
*vhost
= shost_priv(fc_bsg_to_shost(job
));
1712 unsigned long port_id
= (unsigned long)job
->dd_data
;
1713 struct ibmvfc_event
*evt
;
1714 struct ibmvfc_tmf
*tmf
;
1715 unsigned long flags
;
1719 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1720 if (vhost
->aborting_passthru
|| vhost
->state
!= IBMVFC_ACTIVE
) {
1721 __ibmvfc_reset_host(vhost
);
1722 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1726 vhost
->aborting_passthru
= 1;
1727 evt
= ibmvfc_get_event(vhost
);
1728 ibmvfc_init_event(evt
, ibmvfc_bsg_timeout_done
, IBMVFC_MAD_FORMAT
);
1731 memset(tmf
, 0, sizeof(*tmf
));
1732 tmf
->common
.version
= cpu_to_be32(1);
1733 tmf
->common
.opcode
= cpu_to_be32(IBMVFC_TMF_MAD
);
1734 tmf
->common
.length
= cpu_to_be16(sizeof(*tmf
));
1735 tmf
->scsi_id
= cpu_to_be64(port_id
);
1736 tmf
->cancel_key
= cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY
);
1737 tmf
->my_cancel_key
= cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY
);
1738 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1741 vhost
->aborting_passthru
= 0;
1742 dev_err(vhost
->dev
, "Failed to send cancel event. rc=%d\n", rc
);
1745 dev_info(vhost
->dev
, "Cancelling passthru command to port id 0x%lx\n",
1748 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1755 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1756 * @vhost: struct ibmvfc_host to send command
1757 * @port_id: port ID to send command
1760 * 0 on success / other on failure
1762 static int ibmvfc_bsg_plogi(struct ibmvfc_host
*vhost
, unsigned int port_id
)
1764 struct ibmvfc_port_login
*plogi
;
1765 struct ibmvfc_target
*tgt
;
1766 struct ibmvfc_event
*evt
;
1767 union ibmvfc_iu rsp_iu
;
1768 unsigned long flags
;
1769 int rc
= 0, issue_login
= 1;
1772 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1773 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1774 if (tgt
->scsi_id
== port_id
) {
1782 if (unlikely((rc
= ibmvfc_host_chkready(vhost
))))
1785 evt
= ibmvfc_get_event(vhost
);
1786 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1787 plogi
= &evt
->iu
.plogi
;
1788 memset(plogi
, 0, sizeof(*plogi
));
1789 plogi
->common
.version
= cpu_to_be32(1);
1790 plogi
->common
.opcode
= cpu_to_be32(IBMVFC_PORT_LOGIN
);
1791 plogi
->common
.length
= cpu_to_be16(sizeof(*plogi
));
1792 plogi
->scsi_id
= cpu_to_be64(port_id
);
1793 evt
->sync_iu
= &rsp_iu
;
1794 init_completion(&evt
->comp
);
1796 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1797 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1802 wait_for_completion(&evt
->comp
);
1804 if (rsp_iu
.plogi
.common
.status
)
1807 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1808 ibmvfc_free_event(evt
);
1810 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1816 * ibmvfc_bsg_request - Handle a BSG request
1817 * @job: struct bsg_job to be executed
1820 * 0 on success / other on failure
1822 static int ibmvfc_bsg_request(struct bsg_job
*job
)
1824 struct ibmvfc_host
*vhost
= shost_priv(fc_bsg_to_shost(job
));
1825 struct fc_rport
*rport
= fc_bsg_to_rport(job
);
1826 struct ibmvfc_passthru_mad
*mad
;
1827 struct ibmvfc_event
*evt
;
1828 union ibmvfc_iu rsp_iu
;
1829 unsigned long flags
, port_id
= -1;
1830 struct fc_bsg_request
*bsg_request
= job
->request
;
1831 struct fc_bsg_reply
*bsg_reply
= job
->reply
;
1832 unsigned int code
= bsg_request
->msgcode
;
1833 int rc
= 0, req_seg
, rsp_seg
, issue_login
= 0;
1834 u32 fc_flags
, rsp_len
;
1837 bsg_reply
->reply_payload_rcv_len
= 0;
1839 port_id
= rport
->port_id
;
1842 case FC_BSG_HST_ELS_NOLOGIN
:
1843 port_id
= (bsg_request
->rqst_data
.h_els
.port_id
[0] << 16) |
1844 (bsg_request
->rqst_data
.h_els
.port_id
[1] << 8) |
1845 bsg_request
->rqst_data
.h_els
.port_id
[2];
1846 case FC_BSG_RPT_ELS
:
1847 fc_flags
= IBMVFC_FC_ELS
;
1851 port_id
= (bsg_request
->rqst_data
.h_ct
.port_id
[0] << 16) |
1852 (bsg_request
->rqst_data
.h_ct
.port_id
[1] << 8) |
1853 bsg_request
->rqst_data
.h_ct
.port_id
[2];
1855 fc_flags
= IBMVFC_FC_CT_IU
;
1863 if (!mutex_trylock(&vhost
->passthru_mutex
))
1866 job
->dd_data
= (void *)port_id
;
1867 req_seg
= dma_map_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1868 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1871 mutex_unlock(&vhost
->passthru_mutex
);
1875 rsp_seg
= dma_map_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1876 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1879 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1880 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1881 mutex_unlock(&vhost
->passthru_mutex
);
1885 if (req_seg
> 1 || rsp_seg
> 1) {
1891 rc
= ibmvfc_bsg_plogi(vhost
, port_id
);
1893 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1895 if (unlikely(rc
|| (rport
&& (rc
= fc_remote_port_chkready(rport
)))) ||
1896 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1897 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1901 evt
= ibmvfc_get_event(vhost
);
1902 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1903 mad
= &evt
->iu
.passthru
;
1905 memset(mad
, 0, sizeof(*mad
));
1906 mad
->common
.version
= cpu_to_be32(1);
1907 mad
->common
.opcode
= cpu_to_be32(IBMVFC_PASSTHRU
);
1908 mad
->common
.length
= cpu_to_be16(sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
));
1910 mad
->cmd_ioba
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) +
1911 offsetof(struct ibmvfc_passthru_mad
, iu
));
1912 mad
->cmd_ioba
.len
= cpu_to_be32(sizeof(mad
->iu
));
1914 mad
->iu
.cmd_len
= cpu_to_be32(job
->request_payload
.payload_len
);
1915 mad
->iu
.rsp_len
= cpu_to_be32(job
->reply_payload
.payload_len
);
1916 mad
->iu
.flags
= cpu_to_be32(fc_flags
);
1917 mad
->iu
.cancel_key
= cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY
);
1919 mad
->iu
.cmd
.va
= cpu_to_be64(sg_dma_address(job
->request_payload
.sg_list
));
1920 mad
->iu
.cmd
.len
= cpu_to_be32(sg_dma_len(job
->request_payload
.sg_list
));
1921 mad
->iu
.rsp
.va
= cpu_to_be64(sg_dma_address(job
->reply_payload
.sg_list
));
1922 mad
->iu
.rsp
.len
= cpu_to_be32(sg_dma_len(job
->reply_payload
.sg_list
));
1923 mad
->iu
.scsi_id
= cpu_to_be64(port_id
);
1924 mad
->iu
.tag
= cpu_to_be64((u64
)evt
);
1925 rsp_len
= be32_to_cpu(mad
->iu
.rsp
.len
);
1927 evt
->sync_iu
= &rsp_iu
;
1928 init_completion(&evt
->comp
);
1929 rc
= ibmvfc_send_event(evt
, vhost
, 0);
1930 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1937 wait_for_completion(&evt
->comp
);
1939 if (rsp_iu
.passthru
.common
.status
)
1942 bsg_reply
->reply_payload_rcv_len
= rsp_len
;
1944 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1945 ibmvfc_free_event(evt
);
1946 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1947 bsg_reply
->result
= rc
;
1948 bsg_job_done(job
, bsg_reply
->result
,
1949 bsg_reply
->reply_payload_rcv_len
);
1952 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1953 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1954 dma_unmap_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1955 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1956 mutex_unlock(&vhost
->passthru_mutex
);
1962 * ibmvfc_reset_device - Reset the device with the specified reset type
1963 * @sdev: scsi device to reset
1965 * @desc: reset type description for log messages
1968 * 0 on success / other on failure
1970 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1972 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1973 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1974 struct ibmvfc_cmd
*tmf
;
1975 struct ibmvfc_event
*evt
= NULL
;
1976 union ibmvfc_iu rsp_iu
;
1977 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1978 int rsp_rc
= -EBUSY
;
1979 unsigned long flags
;
1982 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1983 if (vhost
->state
== IBMVFC_ACTIVE
) {
1984 evt
= ibmvfc_get_event(vhost
);
1985 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1988 memset(tmf
, 0, sizeof(*tmf
));
1989 tmf
->resp
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) + offsetof(struct ibmvfc_cmd
, rsp
));
1990 tmf
->resp
.len
= cpu_to_be32(sizeof(tmf
->rsp
));
1991 tmf
->frame_type
= cpu_to_be32(IBMVFC_SCSI_FCP_TYPE
);
1992 tmf
->payload_len
= cpu_to_be32(sizeof(tmf
->iu
));
1993 tmf
->resp_len
= cpu_to_be32(sizeof(tmf
->rsp
));
1994 tmf
->cancel_key
= cpu_to_be32((unsigned long)sdev
->hostdata
);
1995 tmf
->tgt_scsi_id
= cpu_to_be64(rport
->port_id
);
1996 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1997 tmf
->flags
= cpu_to_be16((IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
));
1998 tmf
->iu
.tmf_flags
= type
;
1999 evt
->sync_iu
= &rsp_iu
;
2001 init_completion(&evt
->comp
);
2002 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2004 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2007 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
2012 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
2013 wait_for_completion(&evt
->comp
);
2015 if (rsp_iu
.cmd
.status
)
2016 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2019 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2020 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2022 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
2023 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc
,
2024 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu
.cmd
.status
), be16_to_cpu(rsp_iu
.cmd
.error
)),
2025 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2026 fc_rsp
->scsi_status
);
2029 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
2031 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2032 ibmvfc_free_event(evt
);
2033 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2038 * ibmvfc_match_rport - Match function for specified remote port
2039 * @evt: ibmvfc event struct
2040 * @device: device to match (rport)
2043 * 1 if event matches rport / 0 if event does not match rport
2045 static int ibmvfc_match_rport(struct ibmvfc_event
*evt
, void *rport
)
2047 struct fc_rport
*cmd_rport
;
2050 cmd_rport
= starget_to_rport(scsi_target(evt
->cmnd
->device
));
2051 if (cmd_rport
== rport
)
2058 * ibmvfc_match_target - Match function for specified target
2059 * @evt: ibmvfc event struct
2060 * @device: device to match (starget)
2063 * 1 if event matches starget / 0 if event does not match starget
2065 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
2067 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
2073 * ibmvfc_match_lun - Match function for specified LUN
2074 * @evt: ibmvfc event struct
2075 * @device: device to match (sdev)
2078 * 1 if event matches sdev / 0 if event does not match sdev
2080 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
2082 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
2088 * ibmvfc_wait_for_ops - Wait for ops to complete
2089 * @vhost: ibmvfc host struct
2090 * @device: device to match (starget or sdev)
2091 * @match: match function
2096 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
2097 int (*match
) (struct ibmvfc_event
*, void *))
2099 struct ibmvfc_event
*evt
;
2100 DECLARE_COMPLETION_ONSTACK(comp
);
2102 unsigned long flags
;
2103 signed long timeout
= IBMVFC_ABORT_WAIT_TIMEOUT
* HZ
;
2108 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2109 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2110 if (match(evt
, device
)) {
2111 evt
->eh_comp
= &comp
;
2115 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2118 timeout
= wait_for_completion_timeout(&comp
, timeout
);
2122 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2123 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2124 if (match(evt
, device
)) {
2125 evt
->eh_comp
= NULL
;
2129 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2131 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
2133 return wait
? FAILED
: SUCCESS
;
2143 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2144 * @sdev: scsi device to cancel commands
2145 * @type: type of error recovery being performed
2147 * This sends a cancel to the VIOS for the specified device. This does
2148 * NOT send any abort to the actual device. That must be done separately.
2151 * 0 on success / other on failure
2153 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
2155 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2156 struct scsi_target
*starget
= scsi_target(sdev
);
2157 struct fc_rport
*rport
= starget_to_rport(starget
);
2158 struct ibmvfc_tmf
*tmf
;
2159 struct ibmvfc_event
*evt
, *found_evt
;
2160 union ibmvfc_iu rsp
;
2161 int rsp_rc
= -EBUSY
;
2162 unsigned long flags
;
2166 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2168 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2169 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2176 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2177 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
2178 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2182 if (vhost
->logged_in
) {
2183 evt
= ibmvfc_get_event(vhost
);
2184 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
2187 memset(tmf
, 0, sizeof(*tmf
));
2188 tmf
->common
.version
= cpu_to_be32(1);
2189 tmf
->common
.opcode
= cpu_to_be32(IBMVFC_TMF_MAD
);
2190 tmf
->common
.length
= cpu_to_be16(sizeof(*tmf
));
2191 tmf
->scsi_id
= cpu_to_be64(rport
->port_id
);
2192 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
2193 if (!(be64_to_cpu(vhost
->login_buf
->resp
.capabilities
) & IBMVFC_CAN_SUPPRESS_ABTS
))
2194 type
&= ~IBMVFC_TMF_SUPPRESS_ABTS
;
2195 if (vhost
->state
== IBMVFC_ACTIVE
)
2196 tmf
->flags
= cpu_to_be32((type
| IBMVFC_TMF_LUA_VALID
));
2198 tmf
->flags
= cpu_to_be32(((type
& IBMVFC_TMF_SUPPRESS_ABTS
) | IBMVFC_TMF_LUA_VALID
));
2199 tmf
->cancel_key
= cpu_to_be32((unsigned long)sdev
->hostdata
);
2200 tmf
->my_cancel_key
= cpu_to_be32((unsigned long)starget
->hostdata
);
2202 evt
->sync_iu
= &rsp
;
2203 init_completion(&evt
->comp
);
2204 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2207 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2210 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
2211 /* If failure is received, the host adapter is most likely going
2212 through reset, return success so the caller will wait for the command
2213 being cancelled to get returned */
2217 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
2219 wait_for_completion(&evt
->comp
);
2220 status
= be16_to_cpu(rsp
.mad_common
.status
);
2221 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2222 ibmvfc_free_event(evt
);
2223 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2225 if (status
!= IBMVFC_MAD_SUCCESS
) {
2226 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
2228 case IBMVFC_MAD_DRIVER_FAILED
:
2229 case IBMVFC_MAD_CRQ_ERROR
:
2230 /* Host adapter most likely going through reset, return success to
2231 the caller will wait for the command being cancelled to get returned */
2238 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
2243 * ibmvfc_match_key - Match function for specified cancel key
2244 * @evt: ibmvfc event struct
2245 * @key: cancel key to match
2248 * 1 if event matches key / 0 if event does not match key
2250 static int ibmvfc_match_key(struct ibmvfc_event
*evt
, void *key
)
2252 unsigned long cancel_key
= (unsigned long)key
;
2254 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
&&
2255 be32_to_cpu(evt
->iu
.cmd
.cancel_key
) == cancel_key
)
2261 * ibmvfc_match_evt - Match function for specified event
2262 * @evt: ibmvfc event struct
2263 * @match: event to match
2266 * 1 if event matches key / 0 if event does not match key
2268 static int ibmvfc_match_evt(struct ibmvfc_event
*evt
, void *match
)
2276 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2277 * @sdev: scsi device to abort commands
2279 * This sends an Abort Task Set to the VIOS for the specified device. This does
2280 * NOT send any cancel to the VIOS. That must be done separately.
2283 * 0 on success / other on failure
2285 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
2287 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2288 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2289 struct ibmvfc_cmd
*tmf
;
2290 struct ibmvfc_event
*evt
, *found_evt
;
2291 union ibmvfc_iu rsp_iu
;
2292 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
2293 int rc
, rsp_rc
= -EBUSY
;
2294 unsigned long flags
, timeout
= IBMVFC_ABORT_TIMEOUT
;
2297 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2299 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2300 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2307 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2308 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
2309 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2313 if (vhost
->state
== IBMVFC_ACTIVE
) {
2314 evt
= ibmvfc_get_event(vhost
);
2315 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
2318 memset(tmf
, 0, sizeof(*tmf
));
2319 tmf
->resp
.va
= cpu_to_be64(be64_to_cpu(evt
->crq
.ioba
) + offsetof(struct ibmvfc_cmd
, rsp
));
2320 tmf
->resp
.len
= cpu_to_be32(sizeof(tmf
->rsp
));
2321 tmf
->frame_type
= cpu_to_be32(IBMVFC_SCSI_FCP_TYPE
);
2322 tmf
->payload_len
= cpu_to_be32(sizeof(tmf
->iu
));
2323 tmf
->resp_len
= cpu_to_be32(sizeof(tmf
->rsp
));
2324 tmf
->cancel_key
= cpu_to_be32((unsigned long)sdev
->hostdata
);
2325 tmf
->tgt_scsi_id
= cpu_to_be64(rport
->port_id
);
2326 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
2327 tmf
->flags
= cpu_to_be16((IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
));
2328 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
2329 evt
->sync_iu
= &rsp_iu
;
2331 init_completion(&evt
->comp
);
2332 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2335 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2338 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
2342 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
2343 timeout
= wait_for_completion_timeout(&evt
->comp
, timeout
);
2346 rc
= ibmvfc_cancel_all(sdev
, 0);
2348 rc
= ibmvfc_wait_for_ops(vhost
, sdev
->hostdata
, ibmvfc_match_key
);
2354 sdev_printk(KERN_INFO
, sdev
, "Cancel failed, resetting host\n");
2355 ibmvfc_reset_host(vhost
);
2357 rc
= ibmvfc_wait_for_ops(vhost
, sdev
->hostdata
, ibmvfc_match_key
);
2362 rc
= ibmvfc_wait_for_ops(vhost
, evt
, ibmvfc_match_evt
);
2363 if (rc
!= SUCCESS
) {
2364 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2365 ibmvfc_hard_reset_host(vhost
);
2366 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2374 if (rsp_iu
.cmd
.status
)
2375 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2378 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2379 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2381 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
2382 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2383 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu
.cmd
.status
), be16_to_cpu(rsp_iu
.cmd
.error
)),
2384 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2385 fc_rsp
->scsi_status
);
2388 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
2391 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2392 ibmvfc_free_event(evt
);
2393 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2398 * ibmvfc_eh_abort_handler - Abort a command
2399 * @cmd: scsi command to abort
2402 * SUCCESS / FAST_IO_FAIL / FAILED
2404 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
2406 struct scsi_device
*sdev
= cmd
->device
;
2407 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2408 int cancel_rc
, block_rc
;
2412 block_rc
= fc_block_scsi_eh(cmd
);
2413 ibmvfc_wait_while_resetting(vhost
);
2414 if (block_rc
!= FAST_IO_FAIL
) {
2415 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2416 ibmvfc_abort_task_set(sdev
);
2418 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2421 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2423 if (block_rc
== FAST_IO_FAIL
&& rc
!= FAILED
)
2431 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2432 * @cmd: scsi command struct
2435 * SUCCESS / FAST_IO_FAIL / FAILED
2437 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
2439 struct scsi_device
*sdev
= cmd
->device
;
2440 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2441 int cancel_rc
, block_rc
, reset_rc
= 0;
2445 block_rc
= fc_block_scsi_eh(cmd
);
2446 ibmvfc_wait_while_resetting(vhost
);
2447 if (block_rc
!= FAST_IO_FAIL
) {
2448 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
2449 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
2451 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2453 if (!cancel_rc
&& !reset_rc
)
2454 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2456 if (block_rc
== FAST_IO_FAIL
&& rc
!= FAILED
)
2464 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2465 * @sdev: scsi device struct
2466 * @data: return code
2469 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device
*sdev
, void *data
)
2471 unsigned long *rc
= data
;
2472 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2476 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2477 * @sdev: scsi device struct
2478 * @data: return code
2481 static void ibmvfc_dev_cancel_all_reset(struct scsi_device
*sdev
, void *data
)
2483 unsigned long *rc
= data
;
2484 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2488 * ibmvfc_eh_target_reset_handler - Reset the target
2489 * @cmd: scsi command struct
2492 * SUCCESS / FAST_IO_FAIL / FAILED
2494 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2496 struct scsi_device
*sdev
= cmd
->device
;
2497 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2498 struct scsi_target
*starget
= scsi_target(sdev
);
2502 unsigned long cancel_rc
= 0;
2505 block_rc
= fc_block_scsi_eh(cmd
);
2506 ibmvfc_wait_while_resetting(vhost
);
2507 if (block_rc
!= FAST_IO_FAIL
) {
2508 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_reset
);
2509 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2511 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_noreset
);
2513 if (!cancel_rc
&& !reset_rc
)
2514 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2516 if (block_rc
== FAST_IO_FAIL
&& rc
!= FAILED
)
2524 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2525 * @cmd: struct scsi_cmnd having problems
2528 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2531 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2533 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2534 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2536 return rc
? FAILED
: SUCCESS
;
2540 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2541 * @rport: rport struct
2546 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2548 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2549 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2550 struct fc_rport
*dev_rport
;
2551 struct scsi_device
*sdev
;
2555 shost_for_each_device(sdev
, shost
) {
2556 dev_rport
= starget_to_rport(scsi_target(sdev
));
2557 if (dev_rport
!= rport
)
2559 ibmvfc_cancel_all(sdev
, IBMVFC_TMF_SUPPRESS_ABTS
);
2562 rc
= ibmvfc_wait_for_ops(vhost
, rport
, ibmvfc_match_rport
);
2565 ibmvfc_issue_fc_host_lip(shost
);
2569 static const struct ibmvfc_async_desc ae_desc
[] = {
2570 { "PLOGI", IBMVFC_AE_ELS_PLOGI
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2571 { "LOGO", IBMVFC_AE_ELS_LOGO
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2572 { "PRLO", IBMVFC_AE_ELS_PRLO
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2573 { "N-Port SCN", IBMVFC_AE_SCN_NPORT
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2574 { "Group SCN", IBMVFC_AE_SCN_GROUP
, IBMVFC_DEFAULT_LOG_LEVEL
+ 1 },
2575 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN
, IBMVFC_DEFAULT_LOG_LEVEL
},
2576 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC
, IBMVFC_DEFAULT_LOG_LEVEL
},
2577 { "Link Up", IBMVFC_AE_LINK_UP
, IBMVFC_DEFAULT_LOG_LEVEL
},
2578 { "Link Down", IBMVFC_AE_LINK_DOWN
, IBMVFC_DEFAULT_LOG_LEVEL
},
2579 { "Link Dead", IBMVFC_AE_LINK_DEAD
, IBMVFC_DEFAULT_LOG_LEVEL
},
2580 { "Halt", IBMVFC_AE_HALT
, IBMVFC_DEFAULT_LOG_LEVEL
},
2581 { "Resume", IBMVFC_AE_RESUME
, IBMVFC_DEFAULT_LOG_LEVEL
},
2582 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED
, IBMVFC_DEFAULT_LOG_LEVEL
},
2585 static const struct ibmvfc_async_desc unknown_ae
= {
2586 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
2590 * ibmvfc_get_ae_desc - Get text description for async event
2594 static const struct ibmvfc_async_desc
*ibmvfc_get_ae_desc(u64 ae
)
2598 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2599 if (ae_desc
[i
].ae
== ae
)
2605 static const struct {
2606 enum ibmvfc_ae_link_state state
;
2609 { IBMVFC_AE_LS_LINK_UP
, " link up" },
2610 { IBMVFC_AE_LS_LINK_BOUNCED
, " link bounced" },
2611 { IBMVFC_AE_LS_LINK_DOWN
, " link down" },
2612 { IBMVFC_AE_LS_LINK_DEAD
, " link dead" },
2616 * ibmvfc_get_link_state - Get text description for link state
2617 * @state: link state
2620 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state
)
2624 for (i
= 0; i
< ARRAY_SIZE(link_desc
); i
++)
2625 if (link_desc
[i
].state
== state
)
2626 return link_desc
[i
].desc
;
2632 * ibmvfc_handle_async - Handle an async event from the adapter
2633 * @crq: crq to process
2634 * @vhost: ibmvfc host struct
2637 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2638 struct ibmvfc_host
*vhost
)
2640 const struct ibmvfc_async_desc
*desc
= ibmvfc_get_ae_desc(be64_to_cpu(crq
->event
));
2641 struct ibmvfc_target
*tgt
;
2643 ibmvfc_log(vhost
, desc
->log_level
, "%s event received. scsi_id: %llx, wwpn: %llx,"
2644 " node_name: %llx%s\n", desc
->desc
, be64_to_cpu(crq
->scsi_id
),
2645 be64_to_cpu(crq
->wwpn
), be64_to_cpu(crq
->node_name
),
2646 ibmvfc_get_link_state(crq
->link_state
));
2648 switch (be64_to_cpu(crq
->event
)) {
2649 case IBMVFC_AE_RESUME
:
2650 switch (crq
->link_state
) {
2651 case IBMVFC_AE_LS_LINK_DOWN
:
2652 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2654 case IBMVFC_AE_LS_LINK_DEAD
:
2655 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2657 case IBMVFC_AE_LS_LINK_UP
:
2658 case IBMVFC_AE_LS_LINK_BOUNCED
:
2660 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2661 vhost
->delay_init
= 1;
2662 __ibmvfc_reset_host(vhost
);
2667 case IBMVFC_AE_LINK_UP
:
2668 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2669 vhost
->delay_init
= 1;
2670 __ibmvfc_reset_host(vhost
);
2672 case IBMVFC_AE_SCN_FABRIC
:
2673 case IBMVFC_AE_SCN_DOMAIN
:
2674 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2675 if (vhost
->state
< IBMVFC_HALTED
) {
2676 vhost
->delay_init
= 1;
2677 __ibmvfc_reset_host(vhost
);
2680 case IBMVFC_AE_SCN_NPORT
:
2681 case IBMVFC_AE_SCN_GROUP
:
2682 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2683 ibmvfc_reinit_host(vhost
);
2685 case IBMVFC_AE_ELS_LOGO
:
2686 case IBMVFC_AE_ELS_PRLO
:
2687 case IBMVFC_AE_ELS_PLOGI
:
2688 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
2689 if (!crq
->scsi_id
&& !crq
->wwpn
&& !crq
->node_name
)
2691 if (crq
->scsi_id
&& cpu_to_be64(tgt
->scsi_id
) != crq
->scsi_id
)
2693 if (crq
->wwpn
&& cpu_to_be64(tgt
->ids
.port_name
) != crq
->wwpn
)
2695 if (crq
->node_name
&& cpu_to_be64(tgt
->ids
.node_name
) != crq
->node_name
)
2697 if (tgt
->need_login
&& be64_to_cpu(crq
->event
) == IBMVFC_AE_ELS_LOGO
)
2699 if (!tgt
->need_login
|| be64_to_cpu(crq
->event
) == IBMVFC_AE_ELS_PLOGI
) {
2700 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2701 ibmvfc_reinit_host(vhost
);
2705 case IBMVFC_AE_LINK_DOWN
:
2706 case IBMVFC_AE_ADAPTER_FAILED
:
2707 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2709 case IBMVFC_AE_LINK_DEAD
:
2710 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2712 case IBMVFC_AE_HALT
:
2713 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2716 dev_err(vhost
->dev
, "Unknown async event received: %lld\n", crq
->event
);
2722 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2723 * @crq: Command/Response queue
2724 * @vhost: ibmvfc host struct
2727 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2730 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)be64_to_cpu(crq
->ioba
);
2732 switch (crq
->valid
) {
2733 case IBMVFC_CRQ_INIT_RSP
:
2734 switch (crq
->format
) {
2735 case IBMVFC_CRQ_INIT
:
2736 dev_info(vhost
->dev
, "Partner initialized\n");
2737 /* Send back a response */
2738 rc
= ibmvfc_send_crq_init_complete(vhost
);
2740 ibmvfc_init_host(vhost
);
2742 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2744 case IBMVFC_CRQ_INIT_COMPLETE
:
2745 dev_info(vhost
->dev
, "Partner initialization complete\n");
2746 ibmvfc_init_host(vhost
);
2749 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2752 case IBMVFC_CRQ_XPORT_EVENT
:
2753 vhost
->state
= IBMVFC_NO_CRQ
;
2754 vhost
->logged_in
= 0;
2755 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2756 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2757 /* We need to re-setup the interpartition connection */
2758 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2759 vhost
->client_migrated
= 1;
2760 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2761 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2762 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_REENABLE
);
2764 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2765 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2766 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2767 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_RESET
);
2770 case IBMVFC_CRQ_CMD_RSP
:
2773 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2777 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2780 /* The only kind of payload CRQs we should get are responses to
2781 * things we send. Make sure this response is to something we
2784 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2785 dev_err(vhost
->dev
, "Returned correlation_token 0x%08llx is invalid!\n",
2790 if (unlikely(atomic_read(&evt
->free
))) {
2791 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08llx!\n",
2796 del_timer(&evt
->timer
);
2797 list_del(&evt
->queue
);
2798 ibmvfc_trc_end(evt
);
2803 * ibmvfc_scan_finished - Check if the device scan is done.
2804 * @shost: scsi host struct
2805 * @time: current elapsed time
2808 * 0 if scan is not done / 1 if scan is done
2810 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2812 unsigned long flags
;
2813 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2816 spin_lock_irqsave(shost
->host_lock
, flags
);
2817 if (time
>= (init_timeout
* HZ
)) {
2818 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2819 "continuing initialization\n", init_timeout
);
2823 if (vhost
->scan_complete
)
2825 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2830 * ibmvfc_slave_alloc - Setup the device's task set value
2831 * @sdev: struct scsi_device device to configure
2833 * Set the device's task set value so that error handling works as
2837 * 0 on success / -ENXIO if device does not exist
2839 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2841 struct Scsi_Host
*shost
= sdev
->host
;
2842 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2843 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2844 unsigned long flags
= 0;
2846 if (!rport
|| fc_remote_port_chkready(rport
))
2849 spin_lock_irqsave(shost
->host_lock
, flags
);
2850 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2851 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2856 * ibmvfc_target_alloc - Setup the target's task set value
2857 * @starget: struct scsi_target
2859 * Set the target's task set value so that error handling works as
2863 * 0 on success / -ENXIO if device does not exist
2865 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2867 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2868 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2869 unsigned long flags
= 0;
2871 spin_lock_irqsave(shost
->host_lock
, flags
);
2872 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2873 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2878 * ibmvfc_slave_configure - Configure the device
2879 * @sdev: struct scsi_device device to configure
2881 * Enable allow_restart for a device if it is a disk. Adjust the
2882 * queue_depth here also.
2887 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2889 struct Scsi_Host
*shost
= sdev
->host
;
2890 unsigned long flags
= 0;
2892 spin_lock_irqsave(shost
->host_lock
, flags
);
2893 if (sdev
->type
== TYPE_DISK
)
2894 sdev
->allow_restart
= 1;
2895 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2900 * ibmvfc_change_queue_depth - Change the device's queue depth
2901 * @sdev: scsi device struct
2902 * @qdepth: depth to set
2903 * @reason: calling context
2908 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
)
2910 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2911 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2913 return scsi_change_queue_depth(sdev
, qdepth
);
2916 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2917 struct device_attribute
*attr
, char *buf
)
2919 struct Scsi_Host
*shost
= class_to_shost(dev
);
2920 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2922 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2923 vhost
->login_buf
->resp
.partition_name
);
2926 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2927 struct device_attribute
*attr
, char *buf
)
2929 struct Scsi_Host
*shost
= class_to_shost(dev
);
2930 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2932 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2933 vhost
->login_buf
->resp
.device_name
);
2936 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2937 struct device_attribute
*attr
, char *buf
)
2939 struct Scsi_Host
*shost
= class_to_shost(dev
);
2940 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2942 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2943 vhost
->login_buf
->resp
.port_loc_code
);
2946 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2947 struct device_attribute
*attr
, char *buf
)
2949 struct Scsi_Host
*shost
= class_to_shost(dev
);
2950 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2952 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2953 vhost
->login_buf
->resp
.drc_name
);
2956 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2957 struct device_attribute
*attr
, char *buf
)
2959 struct Scsi_Host
*shost
= class_to_shost(dev
);
2960 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2961 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2964 static ssize_t
ibmvfc_show_host_capabilities(struct device
*dev
,
2965 struct device_attribute
*attr
, char *buf
)
2967 struct Scsi_Host
*shost
= class_to_shost(dev
);
2968 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2969 return snprintf(buf
, PAGE_SIZE
, "%llx\n", vhost
->login_buf
->resp
.capabilities
);
2973 * ibmvfc_show_log_level - Show the adapter's error logging level
2974 * @dev: class device struct
2978 * number of bytes printed to buffer
2980 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2981 struct device_attribute
*attr
, char *buf
)
2983 struct Scsi_Host
*shost
= class_to_shost(dev
);
2984 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2985 unsigned long flags
= 0;
2988 spin_lock_irqsave(shost
->host_lock
, flags
);
2989 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2990 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2995 * ibmvfc_store_log_level - Change the adapter's error logging level
2996 * @dev: class device struct
3000 * number of bytes printed to buffer
3002 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
3003 struct device_attribute
*attr
,
3004 const char *buf
, size_t count
)
3006 struct Scsi_Host
*shost
= class_to_shost(dev
);
3007 struct ibmvfc_host
*vhost
= shost_priv(shost
);
3008 unsigned long flags
= 0;
3010 spin_lock_irqsave(shost
->host_lock
, flags
);
3011 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
3012 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3016 static DEVICE_ATTR(partition_name
, S_IRUGO
, ibmvfc_show_host_partition_name
, NULL
);
3017 static DEVICE_ATTR(device_name
, S_IRUGO
, ibmvfc_show_host_device_name
, NULL
);
3018 static DEVICE_ATTR(port_loc_code
, S_IRUGO
, ibmvfc_show_host_loc_code
, NULL
);
3019 static DEVICE_ATTR(drc_name
, S_IRUGO
, ibmvfc_show_host_drc_name
, NULL
);
3020 static DEVICE_ATTR(npiv_version
, S_IRUGO
, ibmvfc_show_host_npiv_version
, NULL
);
3021 static DEVICE_ATTR(capabilities
, S_IRUGO
, ibmvfc_show_host_capabilities
, NULL
);
3022 static DEVICE_ATTR(log_level
, S_IRUGO
| S_IWUSR
,
3023 ibmvfc_show_log_level
, ibmvfc_store_log_level
);
3025 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3027 * ibmvfc_read_trace - Dump the adapter trace
3028 * @filp: open sysfs file
3029 * @kobj: kobject struct
3030 * @bin_attr: bin_attribute struct
3033 * @count: buffer size
3036 * number of bytes printed to buffer
3038 static ssize_t
ibmvfc_read_trace(struct file
*filp
, struct kobject
*kobj
,
3039 struct bin_attribute
*bin_attr
,
3040 char *buf
, loff_t off
, size_t count
)
3042 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
3043 struct Scsi_Host
*shost
= class_to_shost(dev
);
3044 struct ibmvfc_host
*vhost
= shost_priv(shost
);
3045 unsigned long flags
= 0;
3046 int size
= IBMVFC_TRACE_SIZE
;
3047 char *src
= (char *)vhost
->trace
;
3051 if (off
+ count
> size
) {
3056 spin_lock_irqsave(shost
->host_lock
, flags
);
3057 memcpy(buf
, &src
[off
], count
);
3058 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3062 static struct bin_attribute ibmvfc_trace_attr
= {
3068 .read
= ibmvfc_read_trace
,
3072 static struct device_attribute
*ibmvfc_attrs
[] = {
3073 &dev_attr_partition_name
,
3074 &dev_attr_device_name
,
3075 &dev_attr_port_loc_code
,
3077 &dev_attr_npiv_version
,
3078 &dev_attr_capabilities
,
3079 &dev_attr_log_level
,
3083 static struct scsi_host_template driver_template
= {
3084 .module
= THIS_MODULE
,
3085 .name
= "IBM POWER Virtual FC Adapter",
3086 .proc_name
= IBMVFC_NAME
,
3087 .queuecommand
= ibmvfc_queuecommand
,
3088 .eh_timed_out
= fc_eh_timed_out
,
3089 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
3090 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
3091 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
3092 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
3093 .slave_alloc
= ibmvfc_slave_alloc
,
3094 .slave_configure
= ibmvfc_slave_configure
,
3095 .target_alloc
= ibmvfc_target_alloc
,
3096 .scan_finished
= ibmvfc_scan_finished
,
3097 .change_queue_depth
= ibmvfc_change_queue_depth
,
3099 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
3101 .sg_tablesize
= SG_ALL
,
3102 .max_sectors
= IBMVFC_MAX_SECTORS
,
3103 .use_clustering
= ENABLE_CLUSTERING
,
3104 .shost_attrs
= ibmvfc_attrs
,
3105 .track_queue_depth
= 1,
3109 * ibmvfc_next_async_crq - Returns the next entry in async queue
3110 * @vhost: ibmvfc host struct
3113 * Pointer to next entry in queue / NULL if empty
3115 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
3117 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
3118 struct ibmvfc_async_crq
*crq
;
3120 crq
= &async_crq
->msgs
[async_crq
->cur
];
3121 if (crq
->valid
& 0x80) {
3122 if (++async_crq
->cur
== async_crq
->size
)
3132 * ibmvfc_next_crq - Returns the next entry in message queue
3133 * @vhost: ibmvfc host struct
3136 * Pointer to next entry in queue / NULL if empty
3138 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
3140 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
3141 struct ibmvfc_crq
*crq
;
3143 crq
= &queue
->msgs
[queue
->cur
];
3144 if (crq
->valid
& 0x80) {
3145 if (++queue
->cur
== queue
->size
)
3155 * ibmvfc_interrupt - Interrupt handler
3156 * @irq: number of irq to handle, not used
3157 * @dev_instance: ibmvfc_host that received interrupt
3162 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
3164 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
3165 unsigned long flags
;
3167 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3168 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
3169 tasklet_schedule(&vhost
->tasklet
);
3170 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3175 * ibmvfc_tasklet - Interrupt handler tasklet
3176 * @data: ibmvfc host struct
3181 static void ibmvfc_tasklet(void *data
)
3183 struct ibmvfc_host
*vhost
= data
;
3184 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
3185 struct ibmvfc_crq
*crq
;
3186 struct ibmvfc_async_crq
*async
;
3187 unsigned long flags
;
3190 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3192 /* Pull all the valid messages off the async CRQ */
3193 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3194 ibmvfc_handle_async(async
, vhost
);
3199 /* Pull all the valid messages off the CRQ */
3200 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3201 ibmvfc_handle_crq(crq
, vhost
);
3206 vio_enable_interrupts(vdev
);
3207 if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3208 vio_disable_interrupts(vdev
);
3209 ibmvfc_handle_async(async
, vhost
);
3212 } else if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3213 vio_disable_interrupts(vdev
);
3214 ibmvfc_handle_crq(crq
, vhost
);
3221 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3225 * ibmvfc_init_tgt - Set the next init job step for the target
3226 * @tgt: ibmvfc target struct
3227 * @job_step: job step to perform
3230 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
3231 void (*job_step
) (struct ibmvfc_target
*))
3233 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
3234 tgt
->job_step
= job_step
;
3235 wake_up(&tgt
->vhost
->work_wait_q
);
3239 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3240 * @tgt: ibmvfc target struct
3241 * @job_step: initialization job step
3243 * Returns: 1 if step will be retried / 0 if not
3246 static int ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
3247 void (*job_step
) (struct ibmvfc_target
*))
3249 if (++tgt
->init_retries
> IBMVFC_MAX_TGT_INIT_RETRIES
) {
3250 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3251 wake_up(&tgt
->vhost
->work_wait_q
);
3254 ibmvfc_init_tgt(tgt
, job_step
);
3258 /* Defined in FC-LS */
3259 static const struct {
3276 * ibmvfc_get_prli_rsp - Find PRLI response index
3277 * @flags: PRLI response flags
3280 static int ibmvfc_get_prli_rsp(u16 flags
)
3283 int code
= (flags
& 0x0f00) >> 8;
3285 for (i
= 0; i
< ARRAY_SIZE(prli_rsp
); i
++)
3286 if (prli_rsp
[i
].code
== code
)
3293 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3294 * @evt: ibmvfc event struct
3297 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
3299 struct ibmvfc_target
*tgt
= evt
->tgt
;
3300 struct ibmvfc_host
*vhost
= evt
->vhost
;
3301 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
3302 struct ibmvfc_prli_svc_parms
*parms
= &rsp
->parms
;
3303 u32 status
= be16_to_cpu(rsp
->common
.status
);
3304 int index
, level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3306 vhost
->discovery_threads
--;
3307 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3309 case IBMVFC_MAD_SUCCESS
:
3310 tgt_dbg(tgt
, "Process Login succeeded: %X %02X %04X\n",
3311 parms
->type
, parms
->flags
, parms
->service_parms
);
3313 if (parms
->type
== IBMVFC_SCSI_FCP_TYPE
) {
3314 index
= ibmvfc_get_prli_rsp(be16_to_cpu(parms
->flags
));
3315 if (prli_rsp
[index
].logged_in
) {
3316 if (be16_to_cpu(parms
->flags
) & IBMVFC_PRLI_EST_IMG_PAIR
) {
3317 tgt
->need_login
= 0;
3319 if (be32_to_cpu(parms
->service_parms
) & IBMVFC_PRLI_TARGET_FUNC
)
3320 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_TARGET
;
3321 if (be32_to_cpu(parms
->service_parms
) & IBMVFC_PRLI_INITIATOR_FUNC
)
3322 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_INITIATOR
;
3325 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3326 } else if (prli_rsp
[index
].retry
)
3327 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3329 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3331 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3333 case IBMVFC_MAD_DRIVER_FAILED
:
3335 case IBMVFC_MAD_CRQ_ERROR
:
3336 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3338 case IBMVFC_MAD_FAILED
:
3340 if ((be16_to_cpu(rsp
->status
) & IBMVFC_VIOS_FAILURE
) &&
3341 be16_to_cpu(rsp
->error
) == IBMVFC_PLOGI_REQUIRED
)
3342 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3343 else if (tgt
->logo_rcvd
)
3344 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3345 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
3346 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3348 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3350 tgt_log(tgt
, level
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3351 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
3352 rsp
->status
, rsp
->error
, status
);
3356 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3357 ibmvfc_free_event(evt
);
3358 wake_up(&vhost
->work_wait_q
);
3362 * ibmvfc_tgt_send_prli - Send a process login
3363 * @tgt: ibmvfc target struct
3366 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
3368 struct ibmvfc_process_login
*prli
;
3369 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3370 struct ibmvfc_event
*evt
;
3372 if (vhost
->discovery_threads
>= disc_threads
)
3375 kref_get(&tgt
->kref
);
3376 evt
= ibmvfc_get_event(vhost
);
3377 vhost
->discovery_threads
++;
3378 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
3380 prli
= &evt
->iu
.prli
;
3381 memset(prli
, 0, sizeof(*prli
));
3382 prli
->common
.version
= cpu_to_be32(1);
3383 prli
->common
.opcode
= cpu_to_be32(IBMVFC_PROCESS_LOGIN
);
3384 prli
->common
.length
= cpu_to_be16(sizeof(*prli
));
3385 prli
->scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3387 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
3388 prli
->parms
.flags
= cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR
);
3389 prli
->parms
.service_parms
= cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC
);
3390 prli
->parms
.service_parms
|= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED
);
3393 prli
->parms
.service_parms
|= cpu_to_be32(IBMVFC_PRLI_RETRY
);
3395 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3396 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3397 vhost
->discovery_threads
--;
3398 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3399 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3401 tgt_dbg(tgt
, "Sent process login\n");
3405 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3406 * @evt: ibmvfc event struct
3409 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
3411 struct ibmvfc_target
*tgt
= evt
->tgt
;
3412 struct ibmvfc_host
*vhost
= evt
->vhost
;
3413 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
3414 u32 status
= be16_to_cpu(rsp
->common
.status
);
3415 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3417 vhost
->discovery_threads
--;
3418 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3420 case IBMVFC_MAD_SUCCESS
:
3421 tgt_dbg(tgt
, "Port Login succeeded\n");
3422 if (tgt
->ids
.port_name
&&
3423 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
3425 tgt_dbg(tgt
, "Port re-init required\n");
3428 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
3429 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
3430 tgt
->ids
.port_id
= tgt
->scsi_id
;
3431 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
3432 sizeof(tgt
->service_parms
));
3433 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
3434 sizeof(tgt
->service_parms_change
));
3435 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
3437 case IBMVFC_MAD_DRIVER_FAILED
:
3439 case IBMVFC_MAD_CRQ_ERROR
:
3440 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3442 case IBMVFC_MAD_FAILED
:
3444 if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
3445 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3447 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3449 tgt_log(tgt
, level
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3450 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)), rsp
->status
, rsp
->error
,
3451 ibmvfc_get_fc_type(be16_to_cpu(rsp
->fc_type
)), rsp
->fc_type
,
3452 ibmvfc_get_ls_explain(be16_to_cpu(rsp
->fc_explain
)), rsp
->fc_explain
, status
);
3456 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3457 ibmvfc_free_event(evt
);
3458 wake_up(&vhost
->work_wait_q
);
3462 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3463 * @tgt: ibmvfc target struct
3466 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
3468 struct ibmvfc_port_login
*plogi
;
3469 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3470 struct ibmvfc_event
*evt
;
3472 if (vhost
->discovery_threads
>= disc_threads
)
3475 kref_get(&tgt
->kref
);
3477 evt
= ibmvfc_get_event(vhost
);
3478 vhost
->discovery_threads
++;
3479 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3480 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
3482 plogi
= &evt
->iu
.plogi
;
3483 memset(plogi
, 0, sizeof(*plogi
));
3484 plogi
->common
.version
= cpu_to_be32(1);
3485 plogi
->common
.opcode
= cpu_to_be32(IBMVFC_PORT_LOGIN
);
3486 plogi
->common
.length
= cpu_to_be16(sizeof(*plogi
));
3487 plogi
->scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3489 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3490 vhost
->discovery_threads
--;
3491 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3492 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3494 tgt_dbg(tgt
, "Sent port login\n");
3498 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3499 * @evt: ibmvfc event struct
3502 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
3504 struct ibmvfc_target
*tgt
= evt
->tgt
;
3505 struct ibmvfc_host
*vhost
= evt
->vhost
;
3506 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
3507 u32 status
= be16_to_cpu(rsp
->common
.status
);
3509 vhost
->discovery_threads
--;
3510 ibmvfc_free_event(evt
);
3511 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3514 case IBMVFC_MAD_SUCCESS
:
3515 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
3517 case IBMVFC_MAD_DRIVER_FAILED
:
3518 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3519 wake_up(&vhost
->work_wait_q
);
3521 case IBMVFC_MAD_FAILED
:
3523 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
3527 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
3528 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
3529 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
3530 tgt
->scsi_id
!= tgt
->new_scsi_id
)
3531 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3532 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3533 wake_up(&vhost
->work_wait_q
);
3537 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3538 * @tgt: ibmvfc target struct
3541 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
3543 struct ibmvfc_implicit_logout
*mad
;
3544 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3545 struct ibmvfc_event
*evt
;
3547 if (vhost
->discovery_threads
>= disc_threads
)
3550 kref_get(&tgt
->kref
);
3551 evt
= ibmvfc_get_event(vhost
);
3552 vhost
->discovery_threads
++;
3553 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
3555 mad
= &evt
->iu
.implicit_logout
;
3556 memset(mad
, 0, sizeof(*mad
));
3557 mad
->common
.version
= cpu_to_be32(1);
3558 mad
->common
.opcode
= cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT
);
3559 mad
->common
.length
= cpu_to_be16(sizeof(*mad
));
3560 mad
->old_scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3562 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3563 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3564 vhost
->discovery_threads
--;
3565 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3566 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3568 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3572 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3573 * @mad: ibmvfc passthru mad struct
3574 * @tgt: ibmvfc target struct
3577 * 1 if PLOGI needed / 0 if PLOGI not needed
3579 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3580 struct ibmvfc_target
*tgt
)
3582 if (wwn_to_u64((u8
*)&mad
->fc_iu
.response
[2]) != tgt
->ids
.port_name
)
3584 if (wwn_to_u64((u8
*)&mad
->fc_iu
.response
[4]) != tgt
->ids
.node_name
)
3586 if (be32_to_cpu(mad
->fc_iu
.response
[6]) != tgt
->scsi_id
)
3592 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3593 * @evt: ibmvfc event struct
3596 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3598 struct ibmvfc_target
*tgt
= evt
->tgt
;
3599 struct ibmvfc_host
*vhost
= evt
->vhost
;
3600 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3601 u32 status
= be16_to_cpu(mad
->common
.status
);
3602 u8 fc_reason
, fc_explain
;
3604 vhost
->discovery_threads
--;
3605 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3606 del_timer(&tgt
->timer
);
3609 case IBMVFC_MAD_SUCCESS
:
3610 tgt_dbg(tgt
, "ADISC succeeded\n");
3611 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3612 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3614 case IBMVFC_MAD_DRIVER_FAILED
:
3616 case IBMVFC_MAD_FAILED
:
3618 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3619 fc_reason
= (be32_to_cpu(mad
->fc_iu
.response
[1]) & 0x00ff0000) >> 16;
3620 fc_explain
= (be32_to_cpu(mad
->fc_iu
.response
[1]) & 0x0000ff00) >> 8;
3621 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3622 ibmvfc_get_cmd_error(be16_to_cpu(mad
->iu
.status
), be16_to_cpu(mad
->iu
.error
)),
3623 mad
->iu
.status
, mad
->iu
.error
,
3624 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3625 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3629 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3630 ibmvfc_free_event(evt
);
3631 wake_up(&vhost
->work_wait_q
);
3635 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3636 * @evt: ibmvfc event struct
3639 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3641 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3643 memset(mad
, 0, sizeof(*mad
));
3644 mad
->common
.version
= cpu_to_be32(1);
3645 mad
->common
.opcode
= cpu_to_be32(IBMVFC_PASSTHRU
);
3646 mad
->common
.length
= cpu_to_be16(sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
));
3647 mad
->cmd_ioba
.va
= cpu_to_be64((u64
)be64_to_cpu(evt
->crq
.ioba
) +
3648 offsetof(struct ibmvfc_passthru_mad
, iu
));
3649 mad
->cmd_ioba
.len
= cpu_to_be32(sizeof(mad
->iu
));
3650 mad
->iu
.cmd_len
= cpu_to_be32(sizeof(mad
->fc_iu
.payload
));
3651 mad
->iu
.rsp_len
= cpu_to_be32(sizeof(mad
->fc_iu
.response
));
3652 mad
->iu
.cmd
.va
= cpu_to_be64((u64
)be64_to_cpu(evt
->crq
.ioba
) +
3653 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3654 offsetof(struct ibmvfc_passthru_fc_iu
, payload
));
3655 mad
->iu
.cmd
.len
= cpu_to_be32(sizeof(mad
->fc_iu
.payload
));
3656 mad
->iu
.rsp
.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
, response
));
3659 mad
->iu
.rsp
.len
= cpu_to_be32(sizeof(mad
->fc_iu
.response
));
3663 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3664 * @evt: ibmvfc event struct
3666 * Just cleanup this event struct. Everything else is handled by
3667 * the ADISC completion handler. If the ADISC never actually comes
3668 * back, we still have the timer running on the ADISC event struct
3669 * which will fire and cause the CRQ to get reset.
3672 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event
*evt
)
3674 struct ibmvfc_host
*vhost
= evt
->vhost
;
3675 struct ibmvfc_target
*tgt
= evt
->tgt
;
3677 tgt_dbg(tgt
, "ADISC cancel complete\n");
3678 vhost
->abort_threads
--;
3679 ibmvfc_free_event(evt
);
3680 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3681 wake_up(&vhost
->work_wait_q
);
3685 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3686 * @tgt: ibmvfc target struct
3688 * If an ADISC times out, send a cancel. If the cancel times
3689 * out, reset the CRQ. When the ADISC comes back as cancelled,
3690 * log back into the target.
3692 static void ibmvfc_adisc_timeout(struct timer_list
*t
)
3694 struct ibmvfc_target
*tgt
= from_timer(tgt
, t
, timer
);
3695 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3696 struct ibmvfc_event
*evt
;
3697 struct ibmvfc_tmf
*tmf
;
3698 unsigned long flags
;
3701 tgt_dbg(tgt
, "ADISC timeout\n");
3702 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3703 if (vhost
->abort_threads
>= disc_threads
||
3704 tgt
->action
!= IBMVFC_TGT_ACTION_INIT_WAIT
||
3705 vhost
->state
!= IBMVFC_INITIALIZING
||
3706 vhost
->action
!= IBMVFC_HOST_ACTION_QUERY_TGTS
) {
3707 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3711 vhost
->abort_threads
++;
3712 kref_get(&tgt
->kref
);
3713 evt
= ibmvfc_get_event(vhost
);
3714 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_cancel_done
, IBMVFC_MAD_FORMAT
);
3718 memset(tmf
, 0, sizeof(*tmf
));
3719 tmf
->common
.version
= cpu_to_be32(1);
3720 tmf
->common
.opcode
= cpu_to_be32(IBMVFC_TMF_MAD
);
3721 tmf
->common
.length
= cpu_to_be16(sizeof(*tmf
));
3722 tmf
->scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3723 tmf
->cancel_key
= cpu_to_be32(tgt
->cancel_key
);
3725 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
3728 tgt_err(tgt
, "Failed to send cancel event for ADISC. rc=%d\n", rc
);
3729 vhost
->abort_threads
--;
3730 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3731 __ibmvfc_reset_host(vhost
);
3733 tgt_dbg(tgt
, "Attempting to cancel ADISC\n");
3734 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3738 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3739 * @tgt: ibmvfc target struct
3741 * When sending an ADISC we end up with two timers running. The
3742 * first timer is the timer in the ibmvfc target struct. If this
3743 * fires, we send a cancel to the target. The second timer is the
3744 * timer on the ibmvfc event for the ADISC, which is longer. If that
3745 * fires, it means the ADISC timed out and our attempt to cancel it
3746 * also failed, so we need to reset the CRQ.
3748 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3750 struct ibmvfc_passthru_mad
*mad
;
3751 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3752 struct ibmvfc_event
*evt
;
3754 if (vhost
->discovery_threads
>= disc_threads
)
3757 kref_get(&tgt
->kref
);
3758 evt
= ibmvfc_get_event(vhost
);
3759 vhost
->discovery_threads
++;
3760 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3763 ibmvfc_init_passthru(evt
);
3764 mad
= &evt
->iu
.passthru
;
3765 mad
->iu
.flags
= cpu_to_be32(IBMVFC_FC_ELS
);
3766 mad
->iu
.scsi_id
= cpu_to_be64(tgt
->scsi_id
);
3767 mad
->iu
.cancel_key
= cpu_to_be32(tgt
->cancel_key
);
3769 mad
->fc_iu
.payload
[0] = cpu_to_be32(IBMVFC_ADISC
);
3770 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3771 sizeof(vhost
->login_buf
->resp
.port_name
));
3772 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3773 sizeof(vhost
->login_buf
->resp
.node_name
));
3774 mad
->fc_iu
.payload
[6] = cpu_to_be32(be64_to_cpu(vhost
->login_buf
->resp
.scsi_id
) & 0x00ffffff);
3776 if (timer_pending(&tgt
->timer
))
3777 mod_timer(&tgt
->timer
, jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
));
3779 tgt
->timer
.expires
= jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
);
3780 add_timer(&tgt
->timer
);
3783 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3784 if (ibmvfc_send_event(evt
, vhost
, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT
)) {
3785 vhost
->discovery_threads
--;
3786 del_timer(&tgt
->timer
);
3787 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3788 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3790 tgt_dbg(tgt
, "Sent ADISC\n");
3794 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3795 * @evt: ibmvfc event struct
3798 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3800 struct ibmvfc_target
*tgt
= evt
->tgt
;
3801 struct ibmvfc_host
*vhost
= evt
->vhost
;
3802 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3803 u32 status
= be16_to_cpu(rsp
->common
.status
);
3804 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3806 vhost
->discovery_threads
--;
3807 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3809 case IBMVFC_MAD_SUCCESS
:
3810 tgt_dbg(tgt
, "Query Target succeeded\n");
3811 tgt
->new_scsi_id
= be64_to_cpu(rsp
->scsi_id
);
3812 if (be64_to_cpu(rsp
->scsi_id
) != tgt
->scsi_id
)
3813 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3815 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3817 case IBMVFC_MAD_DRIVER_FAILED
:
3819 case IBMVFC_MAD_CRQ_ERROR
:
3820 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3822 case IBMVFC_MAD_FAILED
:
3824 if ((be16_to_cpu(rsp
->status
) & IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3825 be16_to_cpu(rsp
->error
) == IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3826 be16_to_cpu(rsp
->fc_explain
) == IBMVFC_PORT_NAME_NOT_REG
)
3827 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3828 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
3829 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3831 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3833 tgt_log(tgt
, level
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3834 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
3835 rsp
->status
, rsp
->error
, ibmvfc_get_fc_type(be16_to_cpu(rsp
->fc_type
)),
3836 rsp
->fc_type
, ibmvfc_get_gs_explain(be16_to_cpu(rsp
->fc_explain
)),
3837 rsp
->fc_explain
, status
);
3841 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3842 ibmvfc_free_event(evt
);
3843 wake_up(&vhost
->work_wait_q
);
3847 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3848 * @tgt: ibmvfc target struct
3851 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3853 struct ibmvfc_query_tgt
*query_tgt
;
3854 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3855 struct ibmvfc_event
*evt
;
3857 if (vhost
->discovery_threads
>= disc_threads
)
3860 kref_get(&tgt
->kref
);
3861 evt
= ibmvfc_get_event(vhost
);
3862 vhost
->discovery_threads
++;
3864 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3865 query_tgt
= &evt
->iu
.query_tgt
;
3866 memset(query_tgt
, 0, sizeof(*query_tgt
));
3867 query_tgt
->common
.version
= cpu_to_be32(1);
3868 query_tgt
->common
.opcode
= cpu_to_be32(IBMVFC_QUERY_TARGET
);
3869 query_tgt
->common
.length
= cpu_to_be16(sizeof(*query_tgt
));
3870 query_tgt
->wwpn
= cpu_to_be64(tgt
->ids
.port_name
);
3872 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3873 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3874 vhost
->discovery_threads
--;
3875 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3876 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3878 tgt_dbg(tgt
, "Sent Query Target\n");
3882 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3883 * @vhost: ibmvfc host struct
3884 * @scsi_id: SCSI ID to allocate target for
3887 * 0 on success / other on failure
3889 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3891 struct ibmvfc_target
*tgt
;
3892 unsigned long flags
;
3894 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3895 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3896 if (tgt
->scsi_id
== scsi_id
) {
3897 if (tgt
->need_login
)
3898 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3902 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3904 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_NOIO
);
3905 memset(tgt
, 0, sizeof(*tgt
));
3906 tgt
->scsi_id
= scsi_id
;
3907 tgt
->new_scsi_id
= scsi_id
;
3909 tgt
->need_login
= 1;
3910 tgt
->cancel_key
= vhost
->task_set
++;
3911 timer_setup(&tgt
->timer
, ibmvfc_adisc_timeout
, 0);
3912 kref_init(&tgt
->kref
);
3913 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3914 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3915 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3918 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3923 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3924 * @vhost: ibmvfc host struct
3927 * 0 on success / other on failure
3929 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3933 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3934 rc
= ibmvfc_alloc_target(vhost
,
3935 be32_to_cpu(vhost
->disc_buf
->scsi_id
[i
]) &
3936 IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3942 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3943 * @evt: ibmvfc event struct
3946 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3948 struct ibmvfc_host
*vhost
= evt
->vhost
;
3949 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3950 u32 mad_status
= be16_to_cpu(rsp
->common
.status
);
3951 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3953 switch (mad_status
) {
3954 case IBMVFC_MAD_SUCCESS
:
3955 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3956 vhost
->num_targets
= be32_to_cpu(rsp
->num_written
);
3957 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3959 case IBMVFC_MAD_FAILED
:
3960 level
+= ibmvfc_retry_host_init(vhost
);
3961 ibmvfc_log(vhost
, level
, "Discover Targets failed: %s (%x:%x)\n",
3962 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
3963 rsp
->status
, rsp
->error
);
3965 case IBMVFC_MAD_DRIVER_FAILED
:
3968 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3969 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3973 ibmvfc_free_event(evt
);
3974 wake_up(&vhost
->work_wait_q
);
3978 * ibmvfc_discover_targets - Send Discover Targets MAD
3979 * @vhost: ibmvfc host struct
3982 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3984 struct ibmvfc_discover_targets
*mad
;
3985 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3987 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3988 mad
= &evt
->iu
.discover_targets
;
3989 memset(mad
, 0, sizeof(*mad
));
3990 mad
->common
.version
= cpu_to_be32(1);
3991 mad
->common
.opcode
= cpu_to_be32(IBMVFC_DISC_TARGETS
);
3992 mad
->common
.length
= cpu_to_be16(sizeof(*mad
));
3993 mad
->bufflen
= cpu_to_be32(vhost
->disc_buf_sz
);
3994 mad
->buffer
.va
= cpu_to_be64(vhost
->disc_buf_dma
);
3995 mad
->buffer
.len
= cpu_to_be32(vhost
->disc_buf_sz
);
3996 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3998 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3999 ibmvfc_dbg(vhost
, "Sent discover targets\n");
4001 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4005 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4006 * @evt: ibmvfc event struct
4009 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
4011 struct ibmvfc_host
*vhost
= evt
->vhost
;
4012 u32 mad_status
= be16_to_cpu(evt
->xfer_iu
->npiv_login
.common
.status
);
4013 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
4014 unsigned int npiv_max_sectors
;
4015 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
4017 switch (mad_status
) {
4018 case IBMVFC_MAD_SUCCESS
:
4019 ibmvfc_free_event(evt
);
4021 case IBMVFC_MAD_FAILED
:
4022 if (ibmvfc_retry_cmd(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)))
4023 level
+= ibmvfc_retry_host_init(vhost
);
4025 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4026 ibmvfc_log(vhost
, level
, "NPIV Login failed: %s (%x:%x)\n",
4027 ibmvfc_get_cmd_error(be16_to_cpu(rsp
->status
), be16_to_cpu(rsp
->error
)),
4028 rsp
->status
, rsp
->error
);
4029 ibmvfc_free_event(evt
);
4031 case IBMVFC_MAD_CRQ_ERROR
:
4032 ibmvfc_retry_host_init(vhost
);
4033 case IBMVFC_MAD_DRIVER_FAILED
:
4034 ibmvfc_free_event(evt
);
4037 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
4038 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4039 ibmvfc_free_event(evt
);
4043 vhost
->client_migrated
= 0;
4045 if (!(be32_to_cpu(rsp
->flags
) & IBMVFC_NATIVE_FC
)) {
4046 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
4048 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4049 wake_up(&vhost
->work_wait_q
);
4053 if (be32_to_cpu(rsp
->max_cmds
) <= IBMVFC_NUM_INTERNAL_REQ
) {
4054 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
4056 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4057 wake_up(&vhost
->work_wait_q
);
4061 vhost
->logged_in
= 1;
4062 npiv_max_sectors
= min((uint
)(be64_to_cpu(rsp
->max_dma_len
) >> 9), IBMVFC_MAX_SECTORS
);
4063 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
4064 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
4065 rsp
->drc_name
, npiv_max_sectors
);
4067 fc_host_fabric_name(vhost
->host
) = be64_to_cpu(rsp
->node_name
);
4068 fc_host_node_name(vhost
->host
) = be64_to_cpu(rsp
->node_name
);
4069 fc_host_port_name(vhost
->host
) = be64_to_cpu(rsp
->port_name
);
4070 fc_host_port_id(vhost
->host
) = be64_to_cpu(rsp
->scsi_id
);
4071 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
4072 fc_host_supported_classes(vhost
->host
) = 0;
4073 if (be32_to_cpu(rsp
->service_parms
.class1_parms
[0]) & 0x80000000)
4074 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
4075 if (be32_to_cpu(rsp
->service_parms
.class2_parms
[0]) & 0x80000000)
4076 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
4077 if (be32_to_cpu(rsp
->service_parms
.class3_parms
[0]) & 0x80000000)
4078 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
4079 fc_host_maxframe_size(vhost
->host
) =
4080 be16_to_cpu(rsp
->service_parms
.common
.bb_rcv_sz
) & 0x0fff;
4082 vhost
->host
->can_queue
= be32_to_cpu(rsp
->max_cmds
) - IBMVFC_NUM_INTERNAL_REQ
;
4083 vhost
->host
->max_sectors
= npiv_max_sectors
;
4084 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4085 wake_up(&vhost
->work_wait_q
);
4089 * ibmvfc_npiv_login - Sends NPIV login
4090 * @vhost: ibmvfc host struct
4093 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
4095 struct ibmvfc_npiv_login_mad
*mad
;
4096 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
4098 ibmvfc_gather_partition_info(vhost
);
4099 ibmvfc_set_login_info(vhost
);
4100 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
4102 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
4103 mad
= &evt
->iu
.npiv_login
;
4104 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
4105 mad
->common
.version
= cpu_to_be32(1);
4106 mad
->common
.opcode
= cpu_to_be32(IBMVFC_NPIV_LOGIN
);
4107 mad
->common
.length
= cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad
));
4108 mad
->buffer
.va
= cpu_to_be64(vhost
->login_buf_dma
);
4109 mad
->buffer
.len
= cpu_to_be32(sizeof(*vhost
->login_buf
));
4111 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
4113 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4114 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
4116 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4120 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4121 * @vhost: ibmvfc host struct
4124 static void ibmvfc_npiv_logout_done(struct ibmvfc_event
*evt
)
4126 struct ibmvfc_host
*vhost
= evt
->vhost
;
4127 u32 mad_status
= be16_to_cpu(evt
->xfer_iu
->npiv_logout
.common
.status
);
4129 ibmvfc_free_event(evt
);
4131 switch (mad_status
) {
4132 case IBMVFC_MAD_SUCCESS
:
4133 if (list_empty(&vhost
->sent
) &&
4134 vhost
->action
== IBMVFC_HOST_ACTION_LOGO_WAIT
) {
4135 ibmvfc_init_host(vhost
);
4139 case IBMVFC_MAD_FAILED
:
4140 case IBMVFC_MAD_NOT_SUPPORTED
:
4141 case IBMVFC_MAD_CRQ_ERROR
:
4142 case IBMVFC_MAD_DRIVER_FAILED
:
4144 ibmvfc_dbg(vhost
, "NPIV Logout failed. 0x%X\n", mad_status
);
4148 ibmvfc_hard_reset_host(vhost
);
4152 * ibmvfc_npiv_logout - Issue an NPIV Logout
4153 * @vhost: ibmvfc host struct
4156 static void ibmvfc_npiv_logout(struct ibmvfc_host
*vhost
)
4158 struct ibmvfc_npiv_logout_mad
*mad
;
4159 struct ibmvfc_event
*evt
;
4161 evt
= ibmvfc_get_event(vhost
);
4162 ibmvfc_init_event(evt
, ibmvfc_npiv_logout_done
, IBMVFC_MAD_FORMAT
);
4164 mad
= &evt
->iu
.npiv_logout
;
4165 memset(mad
, 0, sizeof(*mad
));
4166 mad
->common
.version
= cpu_to_be32(1);
4167 mad
->common
.opcode
= cpu_to_be32(IBMVFC_NPIV_LOGOUT
);
4168 mad
->common
.length
= cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad
));
4170 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO_WAIT
);
4172 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4173 ibmvfc_dbg(vhost
, "Sent NPIV logout\n");
4175 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4179 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4180 * @vhost: ibmvfc host struct
4183 * 1 if work to do / 0 if not
4185 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
4187 struct ibmvfc_target
*tgt
;
4189 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4190 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
4191 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4199 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4200 * @vhost: ibmvfc host struct
4203 * 1 if work to do / 0 if not
4205 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4207 struct ibmvfc_target
*tgt
;
4209 if (kthread_should_stop())
4211 switch (vhost
->action
) {
4212 case IBMVFC_HOST_ACTION_NONE
:
4213 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4214 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4216 case IBMVFC_HOST_ACTION_TGT_INIT
:
4217 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4218 if (vhost
->discovery_threads
== disc_threads
)
4220 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4221 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
4223 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4224 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4227 case IBMVFC_HOST_ACTION_LOGO
:
4228 case IBMVFC_HOST_ACTION_INIT
:
4229 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4230 case IBMVFC_HOST_ACTION_TGT_DEL
:
4231 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4232 case IBMVFC_HOST_ACTION_QUERY
:
4233 case IBMVFC_HOST_ACTION_RESET
:
4234 case IBMVFC_HOST_ACTION_REENABLE
:
4243 * ibmvfc_work_to_do - Is there task level work to do?
4244 * @vhost: ibmvfc host struct
4247 * 1 if work to do / 0 if not
4249 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4251 unsigned long flags
;
4254 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4255 rc
= __ibmvfc_work_to_do(vhost
);
4256 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4261 * ibmvfc_log_ae - Log async events if necessary
4262 * @vhost: ibmvfc host struct
4263 * @events: events to log
4266 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
4268 if (events
& IBMVFC_AE_RSCN
)
4269 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
4270 if ((events
& IBMVFC_AE_LINKDOWN
) &&
4271 vhost
->state
>= IBMVFC_HALTED
)
4272 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
4273 if ((events
& IBMVFC_AE_LINKUP
) &&
4274 vhost
->state
== IBMVFC_INITIALIZING
)
4275 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
4279 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4280 * @tgt: ibmvfc target struct
4283 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
4285 struct ibmvfc_host
*vhost
= tgt
->vhost
;
4286 struct fc_rport
*rport
;
4287 unsigned long flags
;
4289 tgt_dbg(tgt
, "Adding rport\n");
4290 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
4291 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4293 if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4294 tgt_dbg(tgt
, "Deleting rport\n");
4295 list_del(&tgt
->queue
);
4296 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DELETED_RPORT
);
4297 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4298 fc_remote_port_delete(rport
);
4299 del_timer_sync(&tgt
->timer
);
4300 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4302 } else if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DELETED_RPORT
) {
4303 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4308 tgt_dbg(tgt
, "rport add succeeded\n");
4310 rport
->maxframe_size
= be16_to_cpu(tgt
->service_parms
.common
.bb_rcv_sz
) & 0x0fff;
4311 rport
->supported_classes
= 0;
4312 tgt
->target_id
= rport
->scsi_target_id
;
4313 if (be32_to_cpu(tgt
->service_parms
.class1_parms
[0]) & 0x80000000)
4314 rport
->supported_classes
|= FC_COS_CLASS1
;
4315 if (be32_to_cpu(tgt
->service_parms
.class2_parms
[0]) & 0x80000000)
4316 rport
->supported_classes
|= FC_COS_CLASS2
;
4317 if (be32_to_cpu(tgt
->service_parms
.class3_parms
[0]) & 0x80000000)
4318 rport
->supported_classes
|= FC_COS_CLASS3
;
4320 blk_queue_max_segments(rport
->rqst_q
, 1);
4322 tgt_dbg(tgt
, "rport add failed\n");
4323 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4327 * ibmvfc_do_work - Do task level work
4328 * @vhost: ibmvfc host struct
4331 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
4333 struct ibmvfc_target
*tgt
;
4334 unsigned long flags
;
4335 struct fc_rport
*rport
;
4338 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
4339 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4340 vhost
->events_to_log
= 0;
4341 switch (vhost
->action
) {
4342 case IBMVFC_HOST_ACTION_NONE
:
4343 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4344 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4346 case IBMVFC_HOST_ACTION_RESET
:
4347 vhost
->action
= IBMVFC_HOST_ACTION_TGT_DEL
;
4348 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4349 rc
= ibmvfc_reset_crq(vhost
);
4350 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4352 vio_enable_interrupts(to_vio_dev(vhost
->dev
));
4353 if (rc
|| (rc
= ibmvfc_send_crq_init(vhost
)) ||
4354 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
4355 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4356 dev_err(vhost
->dev
, "Error after reset (rc=%d)\n", rc
);
4359 case IBMVFC_HOST_ACTION_REENABLE
:
4360 vhost
->action
= IBMVFC_HOST_ACTION_TGT_DEL
;
4361 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4362 rc
= ibmvfc_reenable_crq_queue(vhost
);
4363 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4364 if (rc
|| (rc
= ibmvfc_send_crq_init(vhost
))) {
4365 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4366 dev_err(vhost
->dev
, "Error after enable (rc=%d)\n", rc
);
4369 case IBMVFC_HOST_ACTION_LOGO
:
4370 vhost
->job_step(vhost
);
4372 case IBMVFC_HOST_ACTION_INIT
:
4373 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
4374 if (vhost
->delay_init
) {
4375 vhost
->delay_init
= 0;
4376 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4380 vhost
->job_step(vhost
);
4382 case IBMVFC_HOST_ACTION_QUERY
:
4383 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4384 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
4385 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
4387 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4388 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4389 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4395 if (!ibmvfc_dev_init_to_do(vhost
))
4396 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
4398 case IBMVFC_HOST_ACTION_TGT_DEL
:
4399 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4400 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4401 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4402 tgt_dbg(tgt
, "Deleting rport\n");
4405 list_del(&tgt
->queue
);
4406 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DELETED_RPORT
);
4407 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4409 fc_remote_port_delete(rport
);
4410 del_timer_sync(&tgt
->timer
);
4411 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4416 if (vhost
->state
== IBMVFC_INITIALIZING
) {
4417 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_DEL_FAILED
) {
4418 if (vhost
->reinit
) {
4420 scsi_block_requests(vhost
->host
);
4421 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4422 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4424 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
4425 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4426 wake_up(&vhost
->init_wait_q
);
4427 schedule_work(&vhost
->rport_add_work_q
);
4428 vhost
->init_retries
= 0;
4429 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4430 scsi_unblock_requests(vhost
->host
);
4435 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
4436 vhost
->job_step
= ibmvfc_discover_targets
;
4439 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4440 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4441 scsi_unblock_requests(vhost
->host
);
4442 wake_up(&vhost
->init_wait_q
);
4446 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4447 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
4448 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4449 ibmvfc_alloc_targets(vhost
);
4450 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4452 case IBMVFC_HOST_ACTION_TGT_INIT
:
4453 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4454 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4460 if (!ibmvfc_dev_init_to_do(vhost
))
4461 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL_FAILED
);
4467 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4471 * ibmvfc_work - Do task level work
4472 * @data: ibmvfc host struct
4477 static int ibmvfc_work(void *data
)
4479 struct ibmvfc_host
*vhost
= data
;
4482 set_user_nice(current
, MIN_NICE
);
4485 rc
= wait_event_interruptible(vhost
->work_wait_q
,
4486 ibmvfc_work_to_do(vhost
));
4490 if (kthread_should_stop())
4493 ibmvfc_do_work(vhost
);
4496 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
4501 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4502 * @vhost: ibmvfc host struct
4504 * Allocates a page for messages, maps it for dma, and registers
4505 * the crq with the hypervisor.
4508 * zero on success / other on failure
4510 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
4512 int rc
, retrc
= -ENOMEM
;
4513 struct device
*dev
= vhost
->dev
;
4514 struct vio_dev
*vdev
= to_vio_dev(dev
);
4515 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
4518 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
4523 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
4524 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
4525 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4527 if (dma_mapping_error(dev
, crq
->msg_token
))
4530 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
4531 crq
->msg_token
, PAGE_SIZE
);
4533 if (rc
== H_RESOURCE
)
4534 /* maybe kexecing and resource is busy. try a reset */
4535 retrc
= rc
= ibmvfc_reset_crq(vhost
);
4538 dev_warn(dev
, "Partner adapter not ready\n");
4540 dev_warn(dev
, "Error %d opening adapter\n", rc
);
4541 goto reg_crq_failed
;
4546 tasklet_init(&vhost
->tasklet
, (void *)ibmvfc_tasklet
, (unsigned long)vhost
);
4548 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
4549 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
4550 goto req_irq_failed
;
4553 if ((rc
= vio_enable_interrupts(vdev
))) {
4554 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
4555 goto req_irq_failed
;
4563 tasklet_kill(&vhost
->tasklet
);
4565 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
4566 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
4568 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4570 free_page((unsigned long)crq
->msgs
);
4575 * ibmvfc_free_mem - Free memory for vhost
4576 * @vhost: ibmvfc host struct
4581 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
4583 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4586 mempool_destroy(vhost
->tgt_pool
);
4587 kfree(vhost
->trace
);
4588 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4589 vhost
->disc_buf_dma
);
4590 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
4591 vhost
->login_buf
, vhost
->login_buf_dma
);
4592 dma_pool_destroy(vhost
->sg_pool
);
4593 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
4594 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4595 free_page((unsigned long)async_q
->msgs
);
4600 * ibmvfc_alloc_mem - Allocate memory for vhost
4601 * @vhost: ibmvfc host struct
4604 * 0 on success / non-zero on failure
4606 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
4608 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4609 struct device
*dev
= vhost
->dev
;
4612 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
4613 if (!async_q
->msgs
) {
4614 dev_err(dev
, "Couldn't allocate async queue.\n");
4618 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
4619 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
4620 async_q
->size
* sizeof(*async_q
->msgs
),
4623 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
4624 dev_err(dev
, "Failed to map async queue\n");
4625 goto free_async_crq
;
4628 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
4629 SG_ALL
* sizeof(struct srp_direct_buf
),
4630 sizeof(struct srp_direct_buf
), 0);
4632 if (!vhost
->sg_pool
) {
4633 dev_err(dev
, "Failed to allocate sg pool\n");
4634 goto unmap_async_crq
;
4637 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
4638 &vhost
->login_buf_dma
, GFP_KERNEL
);
4640 if (!vhost
->login_buf
) {
4641 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
4645 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
4646 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
4647 &vhost
->disc_buf_dma
, GFP_KERNEL
);
4649 if (!vhost
->disc_buf
) {
4650 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
4651 goto free_login_buffer
;
4654 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
4655 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
4658 goto free_disc_buffer
;
4660 vhost
->tgt_pool
= mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
4661 sizeof(struct ibmvfc_target
));
4663 if (!vhost
->tgt_pool
) {
4664 dev_err(dev
, "Couldn't allocate target memory pool\n");
4672 kfree(vhost
->trace
);
4674 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4675 vhost
->disc_buf_dma
);
4677 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
4678 vhost
->login_buf
, vhost
->login_buf_dma
);
4680 dma_pool_destroy(vhost
->sg_pool
);
4682 dma_unmap_single(dev
, async_q
->msg_token
,
4683 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4685 free_page((unsigned long)async_q
->msgs
);
4692 * ibmvfc_rport_add_thread - Worker thread for rport adds
4693 * @work: work struct
4696 static void ibmvfc_rport_add_thread(struct work_struct
*work
)
4698 struct ibmvfc_host
*vhost
= container_of(work
, struct ibmvfc_host
,
4700 struct ibmvfc_target
*tgt
;
4701 struct fc_rport
*rport
;
4702 unsigned long flags
;
4706 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4709 if (vhost
->state
!= IBMVFC_ACTIVE
)
4712 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4713 if (tgt
->add_rport
) {
4716 kref_get(&tgt
->kref
);
4719 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4720 ibmvfc_tgt_add_rport(tgt
);
4721 } else if (get_device(&rport
->dev
)) {
4722 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4723 tgt_dbg(tgt
, "Setting rport roles\n");
4724 fc_remote_port_rolechg(rport
, tgt
->ids
.roles
);
4725 put_device(&rport
->dev
);
4727 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4730 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4731 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4737 if (vhost
->state
== IBMVFC_ACTIVE
)
4738 vhost
->scan_complete
= 1;
4739 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4744 * ibmvfc_probe - Adapter hot plug add entry point
4745 * @vdev: vio device struct
4746 * @id: vio device id struct
4749 * 0 on success / non-zero on failure
4751 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
4753 struct ibmvfc_host
*vhost
;
4754 struct Scsi_Host
*shost
;
4755 struct device
*dev
= &vdev
->dev
;
4759 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
4761 dev_err(dev
, "Couldn't allocate host data\n");
4765 shost
->transportt
= ibmvfc_transport_template
;
4766 shost
->can_queue
= max_requests
;
4767 shost
->max_lun
= max_lun
;
4768 shost
->max_id
= max_targets
;
4769 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
4770 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
4771 shost
->unique_id
= shost
->host_no
;
4773 vhost
= shost_priv(shost
);
4774 INIT_LIST_HEAD(&vhost
->sent
);
4775 INIT_LIST_HEAD(&vhost
->free
);
4776 INIT_LIST_HEAD(&vhost
->targets
);
4777 sprintf(vhost
->name
, IBMVFC_NAME
);
4778 vhost
->host
= shost
;
4780 vhost
->partition_number
= -1;
4781 vhost
->log_level
= log_level
;
4782 vhost
->task_set
= 1;
4783 strcpy(vhost
->partition_name
, "UNKNOWN");
4784 init_waitqueue_head(&vhost
->work_wait_q
);
4785 init_waitqueue_head(&vhost
->init_wait_q
);
4786 INIT_WORK(&vhost
->rport_add_work_q
, ibmvfc_rport_add_thread
);
4787 mutex_init(&vhost
->passthru_mutex
);
4789 if ((rc
= ibmvfc_alloc_mem(vhost
)))
4790 goto free_scsi_host
;
4792 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
4795 if (IS_ERR(vhost
->work_thread
)) {
4796 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
4797 PTR_ERR(vhost
->work_thread
));
4801 if ((rc
= ibmvfc_init_crq(vhost
))) {
4802 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
4806 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
4807 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
4811 if ((rc
= scsi_add_host(shost
, dev
)))
4812 goto release_event_pool
;
4814 fc_host_dev_loss_tmo(shost
) = IBMVFC_DEV_LOSS_TMO
;
4816 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
4817 &ibmvfc_trace_attr
))) {
4818 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
4822 if (shost_to_fc_host(shost
)->rqst_q
)
4823 blk_queue_max_segments(shost_to_fc_host(shost
)->rqst_q
, 1);
4824 dev_set_drvdata(dev
, vhost
);
4825 spin_lock(&ibmvfc_driver_lock
);
4826 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4827 spin_unlock(&ibmvfc_driver_lock
);
4829 ibmvfc_send_crq_init(vhost
);
4830 scsi_scan_host(shost
);
4834 scsi_remove_host(shost
);
4836 ibmvfc_free_event_pool(vhost
);
4838 ibmvfc_release_crq_queue(vhost
);
4840 kthread_stop(vhost
->work_thread
);
4842 ibmvfc_free_mem(vhost
);
4844 scsi_host_put(shost
);
4851 * ibmvfc_remove - Adapter hot plug remove entry point
4852 * @vdev: vio device struct
4857 static int ibmvfc_remove(struct vio_dev
*vdev
)
4859 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4860 unsigned long flags
;
4863 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4865 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4866 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4867 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4869 ibmvfc_wait_while_resetting(vhost
);
4870 ibmvfc_release_crq_queue(vhost
);
4871 kthread_stop(vhost
->work_thread
);
4872 fc_remove_host(vhost
->host
);
4873 scsi_remove_host(vhost
->host
);
4875 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4876 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4877 ibmvfc_free_event_pool(vhost
);
4878 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4880 ibmvfc_free_mem(vhost
);
4881 spin_lock(&ibmvfc_driver_lock
);
4882 list_del(&vhost
->queue
);
4883 spin_unlock(&ibmvfc_driver_lock
);
4884 scsi_host_put(vhost
->host
);
4890 * ibmvfc_resume - Resume from suspend
4891 * @dev: device struct
4893 * We may have lost an interrupt across suspend/resume, so kick the
4897 static int ibmvfc_resume(struct device
*dev
)
4899 unsigned long flags
;
4900 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
4901 struct vio_dev
*vdev
= to_vio_dev(dev
);
4903 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4904 vio_disable_interrupts(vdev
);
4905 tasklet_schedule(&vhost
->tasklet
);
4906 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4911 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4912 * @vdev: vio device struct
4915 * Number of bytes the driver will need to DMA map at the same time in
4916 * order to perform well.
4918 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4920 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4921 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4924 static const struct vio_device_id ibmvfc_device_table
[] = {
4925 {"fcp", "IBM,vfc-client"},
4928 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4930 static const struct dev_pm_ops ibmvfc_pm_ops
= {
4931 .resume
= ibmvfc_resume
4934 static struct vio_driver ibmvfc_driver
= {
4935 .id_table
= ibmvfc_device_table
,
4936 .probe
= ibmvfc_probe
,
4937 .remove
= ibmvfc_remove
,
4938 .get_desired_dma
= ibmvfc_get_desired_dma
,
4939 .name
= IBMVFC_NAME
,
4940 .pm
= &ibmvfc_pm_ops
,
4943 static struct fc_function_template ibmvfc_transport_functions
= {
4944 .show_host_fabric_name
= 1,
4945 .show_host_node_name
= 1,
4946 .show_host_port_name
= 1,
4947 .show_host_supported_classes
= 1,
4948 .show_host_port_type
= 1,
4949 .show_host_port_id
= 1,
4950 .show_host_maxframe_size
= 1,
4952 .get_host_port_state
= ibmvfc_get_host_port_state
,
4953 .show_host_port_state
= 1,
4955 .get_host_speed
= ibmvfc_get_host_speed
,
4956 .show_host_speed
= 1,
4958 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4959 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4961 .show_rport_maxframe_size
= 1,
4962 .show_rport_supported_classes
= 1,
4964 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4965 .show_rport_dev_loss_tmo
= 1,
4967 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4968 .show_starget_node_name
= 1,
4970 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4971 .show_starget_port_name
= 1,
4973 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4974 .show_starget_port_id
= 1,
4976 .bsg_request
= ibmvfc_bsg_request
,
4977 .bsg_timeout
= ibmvfc_bsg_timeout
,
4981 * ibmvfc_module_init - Initialize the ibmvfc module
4984 * 0 on success / other on failure
4986 static int __init
ibmvfc_module_init(void)
4990 if (!firmware_has_feature(FW_FEATURE_VIO
))
4993 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
4994 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
4996 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
4997 if (!ibmvfc_transport_template
)
5000 rc
= vio_register_driver(&ibmvfc_driver
);
5002 fc_release_transport(ibmvfc_transport_template
);
5007 * ibmvfc_module_exit - Teardown the ibmvfc module
5012 static void __exit
ibmvfc_module_exit(void)
5014 vio_unregister_driver(&ibmvfc_driver
);
5015 fc_release_transport(ibmvfc_transport_template
);
5018 module_init(ibmvfc_module_init
);
5019 module_exit(ibmvfc_module_exit
);