2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
34 #include <linux/stringify.h>
35 #include <asm/firmware.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_tcq.h>
43 #include <scsi/scsi_transport_fc.h>
44 #include <scsi/scsi_bsg_fc.h>
47 static unsigned int init_timeout
= IBMVFC_INIT_TIMEOUT
;
48 static unsigned int default_timeout
= IBMVFC_DEFAULT_TIMEOUT
;
49 static unsigned int max_lun
= IBMVFC_MAX_LUN
;
50 static unsigned int max_targets
= IBMVFC_MAX_TARGETS
;
51 static unsigned int max_requests
= IBMVFC_MAX_REQUESTS_DEFAULT
;
52 static unsigned int disc_threads
= IBMVFC_MAX_DISC_THREADS
;
53 static unsigned int dev_loss_tmo
= IBMVFC_DEV_LOSS_TMO
;
54 static unsigned int ibmvfc_debug
= IBMVFC_DEBUG
;
55 static unsigned int log_level
= IBMVFC_DEFAULT_LOG_LEVEL
;
56 static LIST_HEAD(ibmvfc_head
);
57 static DEFINE_SPINLOCK(ibmvfc_driver_lock
);
58 static struct scsi_transport_template
*ibmvfc_transport_template
;
60 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
61 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
62 MODULE_LICENSE("GPL");
63 MODULE_VERSION(IBMVFC_DRIVER_VERSION
);
65 module_param_named(init_timeout
, init_timeout
, uint
, S_IRUGO
| S_IWUSR
);
66 MODULE_PARM_DESC(init_timeout
, "Initialization timeout in seconds. "
67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT
) "]");
68 module_param_named(default_timeout
, default_timeout
, uint
, S_IRUGO
| S_IWUSR
);
69 MODULE_PARM_DESC(default_timeout
,
70 "Default timeout in seconds for initialization and EH commands. "
71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT
) "]");
72 module_param_named(max_requests
, max_requests
, uint
, S_IRUGO
);
73 MODULE_PARM_DESC(max_requests
, "Maximum requests for this adapter. "
74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT
) "]");
75 module_param_named(max_lun
, max_lun
, uint
, S_IRUGO
);
76 MODULE_PARM_DESC(max_lun
, "Maximum allowed LUN. "
77 "[Default=" __stringify(IBMVFC_MAX_LUN
) "]");
78 module_param_named(max_targets
, max_targets
, uint
, S_IRUGO
);
79 MODULE_PARM_DESC(max_targets
, "Maximum allowed targets. "
80 "[Default=" __stringify(IBMVFC_MAX_TARGETS
) "]");
81 module_param_named(disc_threads
, disc_threads
, uint
, S_IRUGO
);
82 MODULE_PARM_DESC(disc_threads
, "Number of device discovery threads to use. "
83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS
) "]");
84 module_param_named(debug
, ibmvfc_debug
, uint
, S_IRUGO
| S_IWUSR
);
85 MODULE_PARM_DESC(debug
, "Enable driver debug information. "
86 "[Default=" __stringify(IBMVFC_DEBUG
) "]");
87 module_param_named(dev_loss_tmo
, dev_loss_tmo
, uint
, S_IRUGO
| S_IWUSR
);
88 MODULE_PARM_DESC(dev_loss_tmo
, "Maximum number of seconds that the FC "
89 "transport should insulate the loss of a remote port. Once this "
90 "value is exceeded, the scsi target is removed. "
91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO
) "]");
92 module_param_named(log_level
, log_level
, uint
, 0);
93 MODULE_PARM_DESC(log_level
, "Set to 0 - 4 for increasing verbosity of device driver. "
94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL
) "]");
104 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_ESTABLISH
, DID_ERROR
, 1, 1, "unable to establish" },
105 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_FAULT
, DID_OK
, 1, 0, "transport fault" },
106 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CMD_TIMEOUT
, DID_TIME_OUT
, 1, 1, "command timeout" },
107 { IBMVFC_FABRIC_MAPPED
, IBMVFC_ENETDOWN
, DID_TRANSPORT_DISRUPTED
, 1, 1, "network down" },
108 { IBMVFC_FABRIC_MAPPED
, IBMVFC_HW_FAILURE
, DID_ERROR
, 1, 1, "hardware failure" },
109 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DOWN_ERR
, DID_REQUEUE
, 0, 0, "link down" },
110 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DEAD_ERR
, DID_ERROR
, 0, 0, "link dead" },
111 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_REGISTER
, DID_ERROR
, 1, 1, "unable to register" },
112 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_BUSY
, DID_BUS_BUSY
, 1, 0, "transport busy" },
113 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_DEAD
, DID_ERROR
, 0, 1, "transport dead" },
114 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CONFIG_ERROR
, DID_ERROR
, 1, 1, "configuration error" },
115 { IBMVFC_FABRIC_MAPPED
, IBMVFC_NAME_SERVER_FAIL
, DID_ERROR
, 1, 1, "name server failure" },
116 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_HALTED
, DID_REQUEUE
, 1, 0, "link halted" },
117 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_GENERAL
, DID_OK
, 1, 0, "general transport error" },
119 { IBMVFC_VIOS_FAILURE
, IBMVFC_CRQ_FAILURE
, DID_REQUEUE
, 1, 1, "CRQ failure" },
120 { IBMVFC_VIOS_FAILURE
, IBMVFC_SW_FAILURE
, DID_ERROR
, 0, 1, "software failure" },
121 { IBMVFC_VIOS_FAILURE
, IBMVFC_INVALID_PARAMETER
, DID_ERROR
, 0, 1, "invalid parameter" },
122 { IBMVFC_VIOS_FAILURE
, IBMVFC_MISSING_PARAMETER
, DID_ERROR
, 0, 1, "missing parameter" },
123 { IBMVFC_VIOS_FAILURE
, IBMVFC_HOST_IO_BUS
, DID_ERROR
, 1, 1, "host I/O bus failure" },
124 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED
, DID_ERROR
, 0, 1, "transaction cancelled" },
125 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED_IMPLICIT
, DID_ERROR
, 0, 1, "transaction cancelled implicit" },
126 { IBMVFC_VIOS_FAILURE
, IBMVFC_INSUFFICIENT_RESOURCE
, DID_REQUEUE
, 1, 1, "insufficient resources" },
127 { IBMVFC_VIOS_FAILURE
, IBMVFC_PLOGI_REQUIRED
, DID_ERROR
, 0, 1, "port login required" },
128 { IBMVFC_VIOS_FAILURE
, IBMVFC_COMMAND_FAILED
, DID_ERROR
, 1, 1, "command failed" },
130 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_ELS_CMD_CODE
, DID_ERROR
, 0, 1, "invalid ELS command code" },
131 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_VERSION
, DID_ERROR
, 0, 1, "invalid version level" },
132 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_ERROR
, DID_ERROR
, 1, 1, "logical error" },
133 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_CT_IU_SIZE
, DID_ERROR
, 0, 1, "invalid CT_IU size" },
134 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_BUSY
, DID_REQUEUE
, 1, 0, "logical busy" },
135 { IBMVFC_FC_FAILURE
, IBMVFC_PROTOCOL_ERROR
, DID_ERROR
, 1, 1, "protocol error" },
136 { IBMVFC_FC_FAILURE
, IBMVFC_UNABLE_TO_PERFORM_REQ
, DID_ERROR
, 1, 1, "unable to perform request" },
137 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_NOT_SUPPORTED
, DID_ERROR
, 0, 0, "command not supported" },
138 { IBMVFC_FC_FAILURE
, IBMVFC_SERVER_NOT_AVAIL
, DID_ERROR
, 0, 1, "server not available" },
139 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_IN_PROGRESS
, DID_ERROR
, 0, 1, "command already in progress" },
140 { IBMVFC_FC_FAILURE
, IBMVFC_VENDOR_SPECIFIC
, DID_ERROR
, 1, 1, "vendor specific" },
142 { IBMVFC_FC_SCSI_ERROR
, 0, DID_OK
, 1, 0, "SCSI error" },
145 static void ibmvfc_npiv_login(struct ibmvfc_host
*);
146 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*);
147 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*);
148 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*);
149 static void ibmvfc_npiv_logout(struct ibmvfc_host
*);
151 static const char *unknown_error
= "unknown error";
153 #ifdef CONFIG_SCSI_IBMVFC_TRACE
155 * ibmvfc_trc_start - Log a start trace entry
156 * @evt: ibmvfc event struct
159 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
161 struct ibmvfc_host
*vhost
= evt
->vhost
;
162 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
163 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
164 struct ibmvfc_trace_entry
*entry
;
166 entry
= &vhost
->trace
[vhost
->trace_index
++];
168 entry
->time
= jiffies
;
169 entry
->fmt
= evt
->crq
.format
;
170 entry
->type
= IBMVFC_TRC_START
;
172 switch (entry
->fmt
) {
173 case IBMVFC_CMD_FORMAT
:
174 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
175 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
176 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
177 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
178 entry
->u
.start
.xfer_len
= vfc_cmd
->iu
.xfer_len
;
180 case IBMVFC_MAD_FORMAT
:
181 entry
->op_code
= mad
->opcode
;
189 * ibmvfc_trc_end - Log an end trace entry
190 * @evt: ibmvfc event struct
193 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
195 struct ibmvfc_host
*vhost
= evt
->vhost
;
196 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
197 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
198 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
201 entry
->time
= jiffies
;
202 entry
->fmt
= evt
->crq
.format
;
203 entry
->type
= IBMVFC_TRC_END
;
205 switch (entry
->fmt
) {
206 case IBMVFC_CMD_FORMAT
:
207 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
208 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
209 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
210 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
211 entry
->u
.end
.status
= vfc_cmd
->status
;
212 entry
->u
.end
.error
= vfc_cmd
->error
;
213 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
214 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
215 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
217 case IBMVFC_MAD_FORMAT
:
218 entry
->op_code
= mad
->opcode
;
219 entry
->u
.end
.status
= mad
->status
;
228 #define ibmvfc_trc_start(evt) do { } while (0)
229 #define ibmvfc_trc_end(evt) do { } while (0)
233 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
234 * @status: status / error class
238 * index into cmd_status / -EINVAL on failure
240 static int ibmvfc_get_err_index(u16 status
, u16 error
)
244 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
245 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
246 cmd_status
[i
].error
== error
)
253 * ibmvfc_get_cmd_error - Find the error description for the fcp response
254 * @status: status / error class
258 * error description string
260 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
262 int rc
= ibmvfc_get_err_index(status
, error
);
264 return cmd_status
[rc
].name
;
265 return unknown_error
;
269 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
270 * @vfc_cmd: ibmvfc command struct
273 * SCSI result value to return for completed command
275 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
278 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
279 int fc_rsp_len
= rsp
->fcp_rsp_len
;
281 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
282 ((fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
283 rsp
->data
.info
.rsp_code
))
284 return DID_ERROR
<< 16;
286 err
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
288 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
289 return rsp
->scsi_status
| (DID_ERROR
<< 16);
293 * ibmvfc_retry_cmd - Determine if error status is retryable
294 * @status: status / error class
298 * 1 if error should be retried / 0 if it should not
300 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
302 int rc
= ibmvfc_get_err_index(status
, error
);
305 return cmd_status
[rc
].retry
;
309 static const char *unknown_fc_explain
= "unknown fc explain";
311 static const struct {
315 { 0x00, "no additional explanation" },
316 { 0x01, "service parameter error - options" },
317 { 0x03, "service parameter error - initiator control" },
318 { 0x05, "service parameter error - recipient control" },
319 { 0x07, "service parameter error - received data field size" },
320 { 0x09, "service parameter error - concurrent seq" },
321 { 0x0B, "service parameter error - credit" },
322 { 0x0D, "invalid N_Port/F_Port_Name" },
323 { 0x0E, "invalid node/Fabric Name" },
324 { 0x0F, "invalid common service parameters" },
325 { 0x11, "invalid association header" },
326 { 0x13, "association header required" },
327 { 0x15, "invalid originator S_ID" },
328 { 0x17, "invalid OX_ID-RX-ID combination" },
329 { 0x19, "command (request) already in progress" },
330 { 0x1E, "N_Port Login requested" },
331 { 0x1F, "Invalid N_Port_ID" },
334 static const struct {
338 { 0x00, "no additional explanation" },
339 { 0x01, "port identifier not registered" },
340 { 0x02, "port name not registered" },
341 { 0x03, "node name not registered" },
342 { 0x04, "class of service not registered" },
343 { 0x06, "initial process associator not registered" },
344 { 0x07, "FC-4 TYPEs not registered" },
345 { 0x08, "symbolic port name not registered" },
346 { 0x09, "symbolic node name not registered" },
347 { 0x0A, "port type not registered" },
348 { 0xF0, "authorization exception" },
349 { 0xF1, "authentication exception" },
350 { 0xF2, "data base full" },
351 { 0xF3, "data base empty" },
352 { 0xF4, "processing request" },
353 { 0xF5, "unable to verify connection" },
354 { 0xF6, "devices not in a common zone" },
358 * ibmvfc_get_ls_explain - Return the FC Explain description text
359 * @status: FC Explain status
364 static const char *ibmvfc_get_ls_explain(u16 status
)
368 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
369 if (ls_explain
[i
].fc_explain
== status
)
370 return ls_explain
[i
].name
;
372 return unknown_fc_explain
;
376 * ibmvfc_get_gs_explain - Return the FC Explain description text
377 * @status: FC Explain status
382 static const char *ibmvfc_get_gs_explain(u16 status
)
386 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
387 if (gs_explain
[i
].fc_explain
== status
)
388 return gs_explain
[i
].name
;
390 return unknown_fc_explain
;
393 static const struct {
394 enum ibmvfc_fc_type fc_type
;
397 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
398 { IBMVFC_PORT_REJECT
, "port reject" },
399 { IBMVFC_LS_REJECT
, "ELS reject" },
400 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
401 { IBMVFC_PORT_BUSY
, "port busy" },
402 { IBMVFC_BASIC_REJECT
, "basic reject" },
405 static const char *unknown_fc_type
= "unknown fc type";
408 * ibmvfc_get_fc_type - Return the FC Type description text
409 * @status: FC Type error status
414 static const char *ibmvfc_get_fc_type(u16 status
)
418 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
419 if (fc_type
[i
].fc_type
== status
)
420 return fc_type
[i
].name
;
422 return unknown_fc_type
;
426 * ibmvfc_set_tgt_action - Set the next init action for the target
427 * @tgt: ibmvfc target struct
428 * @action: action to perform
431 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
432 enum ibmvfc_target_action action
)
434 switch (tgt
->action
) {
435 case IBMVFC_TGT_ACTION_DEL_RPORT
:
436 if (action
== IBMVFC_TGT_ACTION_DELETED_RPORT
)
437 tgt
->action
= action
;
438 case IBMVFC_TGT_ACTION_DELETED_RPORT
:
441 if (action
== IBMVFC_TGT_ACTION_DEL_RPORT
)
443 tgt
->action
= action
;
449 * ibmvfc_set_host_state - Set the state for the host
450 * @vhost: ibmvfc host struct
451 * @state: state to set host to
454 * 0 if state changed / non-zero if not changed
456 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
457 enum ibmvfc_host_state state
)
461 switch (vhost
->state
) {
462 case IBMVFC_HOST_OFFLINE
:
466 vhost
->state
= state
;
474 * ibmvfc_set_host_action - Set the next init action for the host
475 * @vhost: ibmvfc host struct
476 * @action: action to perform
479 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
480 enum ibmvfc_host_action action
)
483 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
484 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
485 vhost
->action
= action
;
487 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
488 if (vhost
->action
== IBMVFC_HOST_ACTION_LOGO
)
489 vhost
->action
= action
;
491 case IBMVFC_HOST_ACTION_INIT_WAIT
:
492 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
493 vhost
->action
= action
;
495 case IBMVFC_HOST_ACTION_QUERY
:
496 switch (vhost
->action
) {
497 case IBMVFC_HOST_ACTION_INIT_WAIT
:
498 case IBMVFC_HOST_ACTION_NONE
:
499 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
500 vhost
->action
= action
;
506 case IBMVFC_HOST_ACTION_TGT_INIT
:
507 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
508 vhost
->action
= action
;
510 case IBMVFC_HOST_ACTION_INIT
:
511 case IBMVFC_HOST_ACTION_TGT_DEL
:
512 switch (vhost
->action
) {
513 case IBMVFC_HOST_ACTION_RESET
:
514 case IBMVFC_HOST_ACTION_REENABLE
:
517 vhost
->action
= action
;
521 case IBMVFC_HOST_ACTION_LOGO
:
522 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
523 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
524 case IBMVFC_HOST_ACTION_NONE
:
525 case IBMVFC_HOST_ACTION_RESET
:
526 case IBMVFC_HOST_ACTION_REENABLE
:
528 vhost
->action
= action
;
534 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
535 * @vhost: ibmvfc host struct
540 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
542 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
543 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
544 scsi_block_requests(vhost
->host
);
545 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
550 wake_up(&vhost
->work_wait_q
);
554 * ibmvfc_link_down - Handle a link down event from the adapter
555 * @vhost: ibmvfc host struct
556 * @state: ibmvfc host state to enter
559 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
560 enum ibmvfc_host_state state
)
562 struct ibmvfc_target
*tgt
;
565 scsi_block_requests(vhost
->host
);
566 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
567 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
568 ibmvfc_set_host_state(vhost
, state
);
569 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
570 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
571 wake_up(&vhost
->work_wait_q
);
576 * ibmvfc_init_host - Start host initialization
577 * @vhost: ibmvfc host struct
582 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
)
584 struct ibmvfc_target
*tgt
;
586 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
587 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
589 "Host initialization retries exceeded. Taking adapter offline\n");
590 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
595 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
596 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
597 vhost
->async_crq
.cur
= 0;
599 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
600 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
601 scsi_block_requests(vhost
->host
);
602 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
603 vhost
->job_step
= ibmvfc_npiv_login
;
604 wake_up(&vhost
->work_wait_q
);
609 * ibmvfc_send_crq - Send a CRQ
610 * @vhost: ibmvfc host struct
611 * @word1: the first 64 bits of the data
612 * @word2: the second 64 bits of the data
615 * 0 on success / other on failure
617 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
619 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
620 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
624 * ibmvfc_send_crq_init - Send a CRQ init message
625 * @vhost: ibmvfc host struct
628 * 0 on success / other on failure
630 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
632 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
633 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
637 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
638 * @vhost: ibmvfc host struct
641 * 0 on success / other on failure
643 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
645 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
646 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
650 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
651 * @vhost: ibmvfc host struct
653 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
654 * the crq with the hypervisor.
656 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
659 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
660 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
662 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
663 free_irq(vdev
->irq
, vhost
);
664 tasklet_kill(&vhost
->tasklet
);
668 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
669 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
671 vhost
->state
= IBMVFC_NO_CRQ
;
672 vhost
->logged_in
= 0;
673 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
674 free_page((unsigned long)crq
->msgs
);
678 * ibmvfc_reenable_crq_queue - reenables the CRQ
679 * @vhost: ibmvfc host struct
682 * 0 on success / other on failure
684 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
687 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
689 /* Re-enable the CRQ */
693 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
694 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
697 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
703 * ibmvfc_reset_crq - resets a crq after a failure
704 * @vhost: ibmvfc host struct
707 * 0 on success / other on failure
709 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
713 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
714 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
720 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
721 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
723 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
724 vhost
->state
= IBMVFC_NO_CRQ
;
725 vhost
->logged_in
= 0;
726 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
728 /* Clean out the queue */
729 memset(crq
->msgs
, 0, PAGE_SIZE
);
732 /* And re-open it again */
733 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
734 crq
->msg_token
, PAGE_SIZE
);
737 /* Adapter is good, but other end is not ready */
738 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
740 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
741 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
747 * ibmvfc_valid_event - Determines if event is valid.
748 * @pool: event_pool that contains the event
749 * @evt: ibmvfc event to be checked for validity
752 * 1 if event is valid / 0 if event is not valid
754 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
755 struct ibmvfc_event
*evt
)
757 int index
= evt
- pool
->events
;
758 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
760 if (evt
!= pool
->events
+ index
) /* unaligned */
766 * ibmvfc_free_event - Free the specified event
767 * @evt: ibmvfc_event to be freed
770 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
772 struct ibmvfc_host
*vhost
= evt
->vhost
;
773 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
775 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
776 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
777 list_add_tail(&evt
->queue
, &vhost
->free
);
781 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
782 * @evt: ibmvfc event struct
784 * This function does not setup any error status, that must be done
785 * before this function gets called.
787 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
789 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
792 scsi_dma_unmap(cmnd
);
793 cmnd
->scsi_done(cmnd
);
797 complete(evt
->eh_comp
);
799 ibmvfc_free_event(evt
);
803 * ibmvfc_fail_request - Fail request with specified error code
804 * @evt: ibmvfc event struct
805 * @error_code: error code to fail request with
810 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
813 evt
->cmnd
->result
= (error_code
<< 16);
814 evt
->done
= ibmvfc_scsi_eh_done
;
816 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_DRIVER_FAILED
;
818 list_del(&evt
->queue
);
819 del_timer(&evt
->timer
);
825 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
826 * @vhost: ibmvfc host struct
827 * @error_code: error code to fail requests with
832 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
834 struct ibmvfc_event
*evt
, *pos
;
836 ibmvfc_dbg(vhost
, "Purging all requests\n");
837 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
838 ibmvfc_fail_request(evt
, error_code
);
842 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
843 * @vhost: struct ibmvfc host to reset
845 static void ibmvfc_hard_reset_host(struct ibmvfc_host
*vhost
)
847 ibmvfc_purge_requests(vhost
, DID_ERROR
);
848 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
849 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_RESET
);
853 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
854 * @vhost: struct ibmvfc host to reset
856 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
858 if (vhost
->logged_in
&& vhost
->action
!= IBMVFC_HOST_ACTION_LOGO_WAIT
&&
859 !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
860 scsi_block_requests(vhost
->host
);
861 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO
);
862 vhost
->job_step
= ibmvfc_npiv_logout
;
863 wake_up(&vhost
->work_wait_q
);
865 ibmvfc_hard_reset_host(vhost
);
869 * ibmvfc_reset_host - Reset the connection to the server
870 * @vhost: ibmvfc host struct
872 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
876 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
877 __ibmvfc_reset_host(vhost
);
878 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
882 * ibmvfc_retry_host_init - Retry host initialization if allowed
883 * @vhost: ibmvfc host struct
885 * Returns: 1 if init will be retried / 0 if not
888 static int ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
892 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
893 vhost
->delay_init
= 1;
894 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
896 "Host initialization retries exceeded. Taking adapter offline\n");
897 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
898 } else if (vhost
->init_retries
== IBMVFC_MAX_HOST_INIT_RETRIES
)
899 __ibmvfc_reset_host(vhost
);
901 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
906 wake_up(&vhost
->work_wait_q
);
911 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
912 * @starget: scsi target struct
915 * ibmvfc_target struct / NULL if not found
917 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
919 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
920 struct ibmvfc_host
*vhost
= shost_priv(shost
);
921 struct ibmvfc_target
*tgt
;
923 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
924 if (tgt
->target_id
== starget
->id
) {
925 kref_get(&tgt
->kref
);
932 * ibmvfc_get_target - Find the specified scsi_target
933 * @starget: scsi target struct
936 * ibmvfc_target struct / NULL if not found
938 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
940 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
941 struct ibmvfc_target
*tgt
;
944 spin_lock_irqsave(shost
->host_lock
, flags
);
945 tgt
= __ibmvfc_get_target(starget
);
946 spin_unlock_irqrestore(shost
->host_lock
, flags
);
951 * ibmvfc_get_host_speed - Get host port speed
952 * @shost: scsi host struct
957 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
959 struct ibmvfc_host
*vhost
= shost_priv(shost
);
962 spin_lock_irqsave(shost
->host_lock
, flags
);
963 if (vhost
->state
== IBMVFC_ACTIVE
) {
964 switch (vhost
->login_buf
->resp
.link_speed
/ 100) {
966 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
969 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
972 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
975 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
978 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
981 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
984 ibmvfc_log(vhost
, 3, "Unknown port speed: %lld Gbit\n",
985 vhost
->login_buf
->resp
.link_speed
/ 100);
986 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
990 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
991 spin_unlock_irqrestore(shost
->host_lock
, flags
);
995 * ibmvfc_get_host_port_state - Get host port state
996 * @shost: scsi host struct
1001 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
1003 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1004 unsigned long flags
;
1006 spin_lock_irqsave(shost
->host_lock
, flags
);
1007 switch (vhost
->state
) {
1008 case IBMVFC_INITIALIZING
:
1010 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
1012 case IBMVFC_LINK_DOWN
:
1013 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
1015 case IBMVFC_LINK_DEAD
:
1016 case IBMVFC_HOST_OFFLINE
:
1017 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
1020 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
1023 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1026 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
1027 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1030 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1033 static void ibmvfc_set_host_def_dev_loss_tmo(struct Scsi_Host
*shost
)
1035 fc_host_def_dev_loss_tmo(shost
) = dev_loss_tmo
;
1039 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1040 * @rport: rport struct
1041 * @timeout: timeout value
1046 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
1049 rport
->dev_loss_tmo
= timeout
;
1051 rport
->dev_loss_tmo
= 1;
1055 * ibmvfc_release_tgt - Free memory allocated for a target
1056 * @kref: kref struct
1059 static void ibmvfc_release_tgt(struct kref
*kref
)
1061 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1066 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1067 * @starget: scsi target struct
1072 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1074 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1075 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1077 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1081 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1082 * @starget: scsi target struct
1087 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1089 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1090 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1092 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1096 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1097 * @starget: scsi target struct
1102 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1104 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1105 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1107 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1111 * ibmvfc_wait_while_resetting - Wait while the host resets
1112 * @vhost: ibmvfc host struct
1115 * 0 on success / other on failure
1117 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1119 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1120 ((vhost
->state
== IBMVFC_ACTIVE
||
1121 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1122 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1123 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1124 (init_timeout
* HZ
));
1126 return timeout
? 0 : -EIO
;
1130 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1131 * @shost: scsi host struct
1134 * 0 on success / other on failure
1136 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1138 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1140 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1141 ibmvfc_reset_host(vhost
);
1142 return ibmvfc_wait_while_resetting(vhost
);
1146 * ibmvfc_gather_partition_info - Gather info about the LPAR
1151 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1153 struct device_node
*rootdn
;
1155 const unsigned int *num
;
1157 rootdn
= of_find_node_by_path("/");
1161 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1163 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1164 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1166 vhost
->partition_number
= *num
;
1167 of_node_put(rootdn
);
1171 * ibmvfc_set_login_info - Setup info for NPIV login
1172 * @vhost: ibmvfc host struct
1177 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1179 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1180 struct device_node
*of_node
= vhost
->dev
->of_node
;
1181 const char *location
;
1183 memset(login_info
, 0, sizeof(*login_info
));
1185 login_info
->ostype
= IBMVFC_OS_LINUX
;
1186 login_info
->max_dma_len
= IBMVFC_MAX_SECTORS
<< 9;
1187 login_info
->max_payload
= sizeof(struct ibmvfc_fcp_cmd_iu
);
1188 login_info
->max_response
= sizeof(struct ibmvfc_fcp_rsp
);
1189 login_info
->partition_num
= vhost
->partition_number
;
1190 login_info
->vfc_frame_version
= 1;
1191 login_info
->fcp_version
= 3;
1192 login_info
->flags
= IBMVFC_FLUSH_ON_HALT
;
1193 if (vhost
->client_migrated
)
1194 login_info
->flags
|= IBMVFC_CLIENT_MIGRATED
;
1196 login_info
->max_cmds
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1197 login_info
->capabilities
= IBMVFC_CAN_MIGRATE
;
1198 login_info
->async
.va
= vhost
->async_crq
.msg_token
;
1199 login_info
->async
.len
= vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
);
1200 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1201 strncpy(login_info
->device_name
,
1202 dev_name(&vhost
->host
->shost_gendev
), IBMVFC_MAX_NAME
);
1204 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1205 location
= location
? location
: dev_name(vhost
->dev
);
1206 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1210 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1211 * @vhost: ibmvfc host who owns the event pool
1213 * Returns zero on success.
1215 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1218 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1221 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1222 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1226 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1227 pool
->size
* sizeof(*pool
->iu_storage
),
1228 &pool
->iu_token
, 0);
1230 if (!pool
->iu_storage
) {
1231 kfree(pool
->events
);
1235 for (i
= 0; i
< pool
->size
; ++i
) {
1236 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1237 atomic_set(&evt
->free
, 1);
1238 evt
->crq
.valid
= 0x80;
1239 evt
->crq
.ioba
= pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
);
1240 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1242 evt
->ext_list
= NULL
;
1243 list_add_tail(&evt
->queue
, &vhost
->free
);
1251 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1252 * @vhost: ibmvfc host who owns the event pool
1255 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1258 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1261 for (i
= 0; i
< pool
->size
; ++i
) {
1262 list_del(&pool
->events
[i
].queue
);
1263 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1264 if (pool
->events
[i
].ext_list
)
1265 dma_pool_free(vhost
->sg_pool
,
1266 pool
->events
[i
].ext_list
,
1267 pool
->events
[i
].ext_list_token
);
1270 kfree(pool
->events
);
1271 dma_free_coherent(vhost
->dev
,
1272 pool
->size
* sizeof(*pool
->iu_storage
),
1273 pool
->iu_storage
, pool
->iu_token
);
1278 * ibmvfc_get_event - Gets the next free event in pool
1279 * @vhost: ibmvfc host struct
1281 * Returns a free event from the pool.
1283 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1285 struct ibmvfc_event
*evt
;
1287 BUG_ON(list_empty(&vhost
->free
));
1288 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1289 atomic_set(&evt
->free
, 0);
1290 list_del(&evt
->queue
);
1295 * ibmvfc_init_event - Initialize fields in an event struct that are always
1298 * @done: Routine to call when the event is responded to
1299 * @format: SRP or MAD format
1301 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1302 void (*done
) (struct ibmvfc_event
*), u8 format
)
1305 evt
->sync_iu
= NULL
;
1306 evt
->crq
.format
= format
;
1308 evt
->eh_comp
= NULL
;
1312 * ibmvfc_map_sg_list - Initialize scatterlist
1313 * @scmd: scsi command struct
1314 * @nseg: number of scatterlist segments
1315 * @md: memory descriptor list to initialize
1317 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1318 struct srp_direct_buf
*md
)
1321 struct scatterlist
*sg
;
1323 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1324 md
[i
].va
= sg_dma_address(sg
);
1325 md
[i
].len
= sg_dma_len(sg
);
1331 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1332 * @scmd: Scsi_Cmnd with the scatterlist
1333 * @evt: ibmvfc event struct
1334 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1335 * @dev: device for which to map dma memory
1338 * 0 on success / non-zero on failure
1340 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1341 struct ibmvfc_event
*evt
,
1342 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1346 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1347 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1349 sg_mapped
= scsi_dma_map(scmd
);
1351 vfc_cmd
->flags
|= IBMVFC_NO_MEM_DESC
;
1353 } else if (unlikely(sg_mapped
< 0)) {
1354 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1355 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1359 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1360 vfc_cmd
->flags
|= IBMVFC_WRITE
;
1361 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1363 vfc_cmd
->flags
|= IBMVFC_READ
;
1364 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1367 if (sg_mapped
== 1) {
1368 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1372 vfc_cmd
->flags
|= IBMVFC_SCATTERLIST
;
1374 if (!evt
->ext_list
) {
1375 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1376 &evt
->ext_list_token
);
1378 if (!evt
->ext_list
) {
1379 scsi_dma_unmap(scmd
);
1380 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1381 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1386 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1388 data
->va
= evt
->ext_list_token
;
1389 data
->len
= sg_mapped
* sizeof(struct srp_direct_buf
);
1395 * ibmvfc_timeout - Internal command timeout handler
1396 * @evt: struct ibmvfc_event that timed out
1398 * Called when an internally generated command times out
1400 static void ibmvfc_timeout(struct ibmvfc_event
*evt
)
1402 struct ibmvfc_host
*vhost
= evt
->vhost
;
1403 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1404 ibmvfc_reset_host(vhost
);
1408 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1409 * @evt: event to be sent
1410 * @vhost: ibmvfc host struct
1411 * @timeout: timeout in seconds - 0 means do not time command
1413 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1415 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1416 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1418 u64
*crq_as_u64
= (u64
*) &evt
->crq
;
1421 /* Copy the IU into the transfer area */
1422 *evt
->xfer_iu
= evt
->iu
;
1423 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1424 evt
->xfer_iu
->cmd
.tag
= (u64
)evt
;
1425 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1426 evt
->xfer_iu
->mad_common
.tag
= (u64
)evt
;
1430 list_add_tail(&evt
->queue
, &vhost
->sent
);
1431 init_timer(&evt
->timer
);
1434 evt
->timer
.data
= (unsigned long) evt
;
1435 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1436 evt
->timer
.function
= (void (*)(unsigned long))ibmvfc_timeout
;
1437 add_timer(&evt
->timer
);
1442 if ((rc
= ibmvfc_send_crq(vhost
, crq_as_u64
[0], crq_as_u64
[1]))) {
1443 list_del(&evt
->queue
);
1444 del_timer(&evt
->timer
);
1446 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1447 * Firmware will send a CRQ with a transport event (0xFF) to
1448 * tell this client what has happened to the transport. This
1449 * will be handled in ibmvfc_handle_crq()
1451 if (rc
== H_CLOSED
) {
1452 if (printk_ratelimit())
1453 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1455 scsi_dma_unmap(evt
->cmnd
);
1456 ibmvfc_free_event(evt
);
1457 return SCSI_MLQUEUE_HOST_BUSY
;
1460 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1462 evt
->cmnd
->result
= DID_ERROR
<< 16;
1463 evt
->done
= ibmvfc_scsi_eh_done
;
1465 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_CRQ_ERROR
;
1469 ibmvfc_trc_start(evt
);
1475 * ibmvfc_log_error - Log an error for the failed command if appropriate
1476 * @evt: ibmvfc event to log
1479 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1481 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1482 struct ibmvfc_host
*vhost
= evt
->vhost
;
1483 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1484 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1485 const char *err
= unknown_error
;
1486 int index
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
1491 logerr
= cmd_status
[index
].log
;
1492 err
= cmd_status
[index
].name
;
1495 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1498 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1499 rsp_code
= rsp
->data
.info
.rsp_code
;
1501 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1502 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1503 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1504 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1508 * ibmvfc_relogin - Log back into the specified device
1509 * @sdev: scsi device struct
1512 static void ibmvfc_relogin(struct scsi_device
*sdev
)
1514 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1515 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1516 struct ibmvfc_target
*tgt
;
1518 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1519 if (rport
== tgt
->rport
) {
1520 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
1525 ibmvfc_reinit_host(vhost
);
1529 * ibmvfc_scsi_done - Handle responses from commands
1530 * @evt: ibmvfc event to be handled
1532 * Used as a callback when sending scsi cmds.
1534 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1536 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1537 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1538 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1540 u32 sense_len
= rsp
->fcp_sense_len
;
1543 if (vfc_cmd
->response_flags
& IBMVFC_ADAPTER_RESID_VALID
)
1544 scsi_set_resid(cmnd
, vfc_cmd
->adapter_resid
);
1545 else if (rsp
->flags
& FCP_RESID_UNDER
)
1546 scsi_set_resid(cmnd
, rsp
->fcp_resid
);
1548 scsi_set_resid(cmnd
, 0);
1550 if (vfc_cmd
->status
) {
1551 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1553 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1554 rsp_len
= rsp
->fcp_rsp_len
;
1555 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1556 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1557 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1558 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1559 if ((vfc_cmd
->status
& IBMVFC_VIOS_FAILURE
) && (vfc_cmd
->error
== IBMVFC_PLOGI_REQUIRED
))
1560 ibmvfc_relogin(cmnd
->device
);
1562 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1563 cmnd
->result
= (DID_ERROR
<< 16);
1565 ibmvfc_log_error(evt
);
1568 if (!cmnd
->result
&&
1569 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1570 cmnd
->result
= (DID_ERROR
<< 16);
1572 scsi_dma_unmap(cmnd
);
1573 cmnd
->scsi_done(cmnd
);
1577 complete(evt
->eh_comp
);
1579 ibmvfc_free_event(evt
);
1583 * ibmvfc_host_chkready - Check if the host can accept commands
1584 * @vhost: struct ibmvfc host
1587 * 1 if host can accept command / 0 if not
1589 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1593 switch (vhost
->state
) {
1594 case IBMVFC_LINK_DEAD
:
1595 case IBMVFC_HOST_OFFLINE
:
1596 result
= DID_NO_CONNECT
<< 16;
1599 case IBMVFC_INITIALIZING
:
1601 case IBMVFC_LINK_DOWN
:
1602 result
= DID_REQUEUE
<< 16;
1613 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1614 * @cmnd: struct scsi_cmnd to be executed
1615 * @done: Callback function to be called when cmnd is completed
1618 * 0 on success / other on failure
1620 static int ibmvfc_queuecommand(struct scsi_cmnd
*cmnd
,
1621 void (*done
) (struct scsi_cmnd
*))
1623 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1624 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1625 struct ibmvfc_cmd
*vfc_cmd
;
1626 struct ibmvfc_event
*evt
;
1630 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1631 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1637 cmnd
->result
= (DID_OK
<< 16);
1638 evt
= ibmvfc_get_event(vhost
);
1639 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1641 cmnd
->scsi_done
= done
;
1642 vfc_cmd
= &evt
->iu
.cmd
;
1643 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1644 vfc_cmd
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1645 vfc_cmd
->resp
.len
= sizeof(vfc_cmd
->rsp
);
1646 vfc_cmd
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1647 vfc_cmd
->payload_len
= sizeof(vfc_cmd
->iu
);
1648 vfc_cmd
->resp_len
= sizeof(vfc_cmd
->rsp
);
1649 vfc_cmd
->cancel_key
= (unsigned long)cmnd
->device
->hostdata
;
1650 vfc_cmd
->tgt_scsi_id
= rport
->port_id
;
1651 vfc_cmd
->iu
.xfer_len
= scsi_bufflen(cmnd
);
1652 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1653 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1655 if (scsi_populate_tag_msg(cmnd
, tag
)) {
1656 vfc_cmd
->task_tag
= tag
[1];
1658 case MSG_SIMPLE_TAG
:
1659 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1662 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_HEAD_OF_QUEUE
;
1664 case MSG_ORDERED_TAG
:
1665 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_ORDERED_TASK
;
1670 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1671 return ibmvfc_send_event(evt
, vhost
, 0);
1673 ibmvfc_free_event(evt
);
1675 return SCSI_MLQUEUE_HOST_BUSY
;
1677 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1678 scmd_printk(KERN_ERR
, cmnd
,
1679 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1681 cmnd
->result
= DID_ERROR
<< 16;
1687 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1688 * @evt: ibmvfc event struct
1691 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1693 /* copy the response back */
1695 *evt
->sync_iu
= *evt
->xfer_iu
;
1697 complete(&evt
->comp
);
1701 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1702 * @evt: struct ibmvfc_event
1705 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event
*evt
)
1707 struct ibmvfc_host
*vhost
= evt
->vhost
;
1709 ibmvfc_free_event(evt
);
1710 vhost
->aborting_passthru
= 0;
1711 dev_info(vhost
->dev
, "Passthru command cancelled\n");
1715 * ibmvfc_bsg_timeout - Handle a BSG timeout
1716 * @job: struct fc_bsg_job that timed out
1719 * 0 on success / other on failure
1721 static int ibmvfc_bsg_timeout(struct fc_bsg_job
*job
)
1723 struct ibmvfc_host
*vhost
= shost_priv(job
->shost
);
1724 unsigned long port_id
= (unsigned long)job
->dd_data
;
1725 struct ibmvfc_event
*evt
;
1726 struct ibmvfc_tmf
*tmf
;
1727 unsigned long flags
;
1731 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1732 if (vhost
->aborting_passthru
|| vhost
->state
!= IBMVFC_ACTIVE
) {
1733 __ibmvfc_reset_host(vhost
);
1734 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1738 vhost
->aborting_passthru
= 1;
1739 evt
= ibmvfc_get_event(vhost
);
1740 ibmvfc_init_event(evt
, ibmvfc_bsg_timeout_done
, IBMVFC_MAD_FORMAT
);
1743 memset(tmf
, 0, sizeof(*tmf
));
1744 tmf
->common
.version
= 1;
1745 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
1746 tmf
->common
.length
= sizeof(*tmf
);
1747 tmf
->scsi_id
= port_id
;
1748 tmf
->cancel_key
= IBMVFC_PASSTHRU_CANCEL_KEY
;
1749 tmf
->my_cancel_key
= IBMVFC_INTERNAL_CANCEL_KEY
;
1750 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1753 vhost
->aborting_passthru
= 0;
1754 dev_err(vhost
->dev
, "Failed to send cancel event. rc=%d\n", rc
);
1757 dev_info(vhost
->dev
, "Cancelling passthru command to port id 0x%lx\n",
1760 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1767 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1768 * @vhost: struct ibmvfc_host to send command
1769 * @port_id: port ID to send command
1772 * 0 on success / other on failure
1774 static int ibmvfc_bsg_plogi(struct ibmvfc_host
*vhost
, unsigned int port_id
)
1776 struct ibmvfc_port_login
*plogi
;
1777 struct ibmvfc_target
*tgt
;
1778 struct ibmvfc_event
*evt
;
1779 union ibmvfc_iu rsp_iu
;
1780 unsigned long flags
;
1781 int rc
= 0, issue_login
= 1;
1784 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1785 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1786 if (tgt
->scsi_id
== port_id
) {
1794 if (unlikely((rc
= ibmvfc_host_chkready(vhost
))))
1797 evt
= ibmvfc_get_event(vhost
);
1798 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1799 plogi
= &evt
->iu
.plogi
;
1800 memset(plogi
, 0, sizeof(*plogi
));
1801 plogi
->common
.version
= 1;
1802 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
1803 plogi
->common
.length
= sizeof(*plogi
);
1804 plogi
->scsi_id
= port_id
;
1805 evt
->sync_iu
= &rsp_iu
;
1806 init_completion(&evt
->comp
);
1808 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1809 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1814 wait_for_completion(&evt
->comp
);
1816 if (rsp_iu
.plogi
.common
.status
)
1819 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1820 ibmvfc_free_event(evt
);
1822 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1828 * ibmvfc_bsg_request - Handle a BSG request
1829 * @job: struct fc_bsg_job to be executed
1832 * 0 on success / other on failure
1834 static int ibmvfc_bsg_request(struct fc_bsg_job
*job
)
1836 struct ibmvfc_host
*vhost
= shost_priv(job
->shost
);
1837 struct fc_rport
*rport
= job
->rport
;
1838 struct ibmvfc_passthru_mad
*mad
;
1839 struct ibmvfc_event
*evt
;
1840 union ibmvfc_iu rsp_iu
;
1841 unsigned long flags
, port_id
= -1;
1842 unsigned int code
= job
->request
->msgcode
;
1843 int rc
= 0, req_seg
, rsp_seg
, issue_login
= 0;
1844 u32 fc_flags
, rsp_len
;
1847 job
->reply
->reply_payload_rcv_len
= 0;
1849 port_id
= rport
->port_id
;
1852 case FC_BSG_HST_ELS_NOLOGIN
:
1853 port_id
= (job
->request
->rqst_data
.h_els
.port_id
[0] << 16) |
1854 (job
->request
->rqst_data
.h_els
.port_id
[1] << 8) |
1855 job
->request
->rqst_data
.h_els
.port_id
[2];
1856 case FC_BSG_RPT_ELS
:
1857 fc_flags
= IBMVFC_FC_ELS
;
1861 port_id
= (job
->request
->rqst_data
.h_ct
.port_id
[0] << 16) |
1862 (job
->request
->rqst_data
.h_ct
.port_id
[1] << 8) |
1863 job
->request
->rqst_data
.h_ct
.port_id
[2];
1865 fc_flags
= IBMVFC_FC_CT_IU
;
1873 if (!mutex_trylock(&vhost
->passthru_mutex
))
1876 job
->dd_data
= (void *)port_id
;
1877 req_seg
= dma_map_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1878 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1881 mutex_unlock(&vhost
->passthru_mutex
);
1885 rsp_seg
= dma_map_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1886 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1889 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1890 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1891 mutex_unlock(&vhost
->passthru_mutex
);
1895 if (req_seg
> 1 || rsp_seg
> 1) {
1901 rc
= ibmvfc_bsg_plogi(vhost
, port_id
);
1903 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1905 if (unlikely(rc
|| (rport
&& (rc
= fc_remote_port_chkready(rport
)))) ||
1906 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1907 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1911 evt
= ibmvfc_get_event(vhost
);
1912 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1913 mad
= &evt
->iu
.passthru
;
1915 memset(mad
, 0, sizeof(*mad
));
1916 mad
->common
.version
= 1;
1917 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
1918 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
1920 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
1921 offsetof(struct ibmvfc_passthru_mad
, iu
);
1922 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
1924 mad
->iu
.cmd_len
= job
->request_payload
.payload_len
;
1925 mad
->iu
.rsp_len
= job
->reply_payload
.payload_len
;
1926 mad
->iu
.flags
= fc_flags
;
1927 mad
->iu
.cancel_key
= IBMVFC_PASSTHRU_CANCEL_KEY
;
1929 mad
->iu
.cmd
.va
= sg_dma_address(job
->request_payload
.sg_list
);
1930 mad
->iu
.cmd
.len
= sg_dma_len(job
->request_payload
.sg_list
);
1931 mad
->iu
.rsp
.va
= sg_dma_address(job
->reply_payload
.sg_list
);
1932 mad
->iu
.rsp
.len
= sg_dma_len(job
->reply_payload
.sg_list
);
1933 mad
->iu
.scsi_id
= port_id
;
1934 mad
->iu
.tag
= (u64
)evt
;
1935 rsp_len
= mad
->iu
.rsp
.len
;
1937 evt
->sync_iu
= &rsp_iu
;
1938 init_completion(&evt
->comp
);
1939 rc
= ibmvfc_send_event(evt
, vhost
, 0);
1940 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1947 wait_for_completion(&evt
->comp
);
1949 if (rsp_iu
.passthru
.common
.status
)
1952 job
->reply
->reply_payload_rcv_len
= rsp_len
;
1954 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1955 ibmvfc_free_event(evt
);
1956 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1957 job
->reply
->result
= rc
;
1961 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1962 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1963 dma_unmap_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1964 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1965 mutex_unlock(&vhost
->passthru_mutex
);
1971 * ibmvfc_reset_device - Reset the device with the specified reset type
1972 * @sdev: scsi device to reset
1974 * @desc: reset type description for log messages
1977 * 0 on success / other on failure
1979 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1981 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1982 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1983 struct ibmvfc_cmd
*tmf
;
1984 struct ibmvfc_event
*evt
= NULL
;
1985 union ibmvfc_iu rsp_iu
;
1986 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1987 int rsp_rc
= -EBUSY
;
1988 unsigned long flags
;
1991 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1992 if (vhost
->state
== IBMVFC_ACTIVE
) {
1993 evt
= ibmvfc_get_event(vhost
);
1994 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1997 memset(tmf
, 0, sizeof(*tmf
));
1998 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1999 tmf
->resp
.len
= sizeof(tmf
->rsp
);
2000 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
2001 tmf
->payload_len
= sizeof(tmf
->iu
);
2002 tmf
->resp_len
= sizeof(tmf
->rsp
);
2003 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
2004 tmf
->tgt_scsi_id
= rport
->port_id
;
2005 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
2006 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
2007 tmf
->iu
.tmf_flags
= type
;
2008 evt
->sync_iu
= &rsp_iu
;
2010 init_completion(&evt
->comp
);
2011 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2013 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2016 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
2021 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
2022 wait_for_completion(&evt
->comp
);
2024 if (rsp_iu
.cmd
.status
)
2025 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2028 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2029 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2031 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
2032 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2033 desc
, ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
2034 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2035 fc_rsp
->scsi_status
);
2038 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
2040 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2041 ibmvfc_free_event(evt
);
2042 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2047 * ibmvfc_match_rport - Match function for specified remote port
2048 * @evt: ibmvfc event struct
2049 * @device: device to match (rport)
2052 * 1 if event matches rport / 0 if event does not match rport
2054 static int ibmvfc_match_rport(struct ibmvfc_event
*evt
, void *rport
)
2056 struct fc_rport
*cmd_rport
;
2059 cmd_rport
= starget_to_rport(scsi_target(evt
->cmnd
->device
));
2060 if (cmd_rport
== rport
)
2067 * ibmvfc_match_target - Match function for specified target
2068 * @evt: ibmvfc event struct
2069 * @device: device to match (starget)
2072 * 1 if event matches starget / 0 if event does not match starget
2074 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
2076 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
2082 * ibmvfc_match_lun - Match function for specified LUN
2083 * @evt: ibmvfc event struct
2084 * @device: device to match (sdev)
2087 * 1 if event matches sdev / 0 if event does not match sdev
2089 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
2091 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
2097 * ibmvfc_wait_for_ops - Wait for ops to complete
2098 * @vhost: ibmvfc host struct
2099 * @device: device to match (starget or sdev)
2100 * @match: match function
2105 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
2106 int (*match
) (struct ibmvfc_event
*, void *))
2108 struct ibmvfc_event
*evt
;
2109 DECLARE_COMPLETION_ONSTACK(comp
);
2111 unsigned long flags
;
2112 signed long timeout
= IBMVFC_ABORT_WAIT_TIMEOUT
* HZ
;
2117 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2118 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2119 if (match(evt
, device
)) {
2120 evt
->eh_comp
= &comp
;
2124 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2127 timeout
= wait_for_completion_timeout(&comp
, timeout
);
2131 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2132 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2133 if (match(evt
, device
)) {
2134 evt
->eh_comp
= NULL
;
2138 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2140 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
2142 return wait
? FAILED
: SUCCESS
;
2152 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2153 * @sdev: scsi device to cancel commands
2154 * @type: type of error recovery being performed
2156 * This sends a cancel to the VIOS for the specified device. This does
2157 * NOT send any abort to the actual device. That must be done separately.
2160 * 0 on success / other on failure
2162 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
2164 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2165 struct scsi_target
*starget
= scsi_target(sdev
);
2166 struct fc_rport
*rport
= starget_to_rport(starget
);
2167 struct ibmvfc_tmf
*tmf
;
2168 struct ibmvfc_event
*evt
, *found_evt
;
2169 union ibmvfc_iu rsp
;
2170 int rsp_rc
= -EBUSY
;
2171 unsigned long flags
;
2175 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2177 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2178 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2185 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2186 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
2187 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2191 if (vhost
->state
== IBMVFC_ACTIVE
) {
2192 evt
= ibmvfc_get_event(vhost
);
2193 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
2196 memset(tmf
, 0, sizeof(*tmf
));
2197 tmf
->common
.version
= 1;
2198 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
2199 tmf
->common
.length
= sizeof(*tmf
);
2200 tmf
->scsi_id
= rport
->port_id
;
2201 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
2202 tmf
->flags
= (type
| IBMVFC_TMF_LUA_VALID
);
2203 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
2204 tmf
->my_cancel_key
= (unsigned long)starget
->hostdata
;
2206 evt
->sync_iu
= &rsp
;
2207 init_completion(&evt
->comp
);
2208 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2211 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2214 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
2218 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
2220 wait_for_completion(&evt
->comp
);
2221 status
= rsp
.mad_common
.status
;
2222 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2223 ibmvfc_free_event(evt
);
2224 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2226 if (status
!= IBMVFC_MAD_SUCCESS
) {
2227 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
2231 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
2236 * ibmvfc_match_key - Match function for specified cancel key
2237 * @evt: ibmvfc event struct
2238 * @key: cancel key to match
2241 * 1 if event matches key / 0 if event does not match key
2243 static int ibmvfc_match_key(struct ibmvfc_event
*evt
, void *key
)
2245 unsigned long cancel_key
= (unsigned long)key
;
2247 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
&&
2248 evt
->iu
.cmd
.cancel_key
== cancel_key
)
2254 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2255 * @sdev: scsi device to abort commands
2257 * This sends an Abort Task Set to the VIOS for the specified device. This does
2258 * NOT send any cancel to the VIOS. That must be done separately.
2261 * 0 on success / other on failure
2263 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
2265 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2266 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2267 struct ibmvfc_cmd
*tmf
;
2268 struct ibmvfc_event
*evt
, *found_evt
;
2269 union ibmvfc_iu rsp_iu
;
2270 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
2271 int rc
, rsp_rc
= -EBUSY
;
2272 unsigned long flags
, timeout
= IBMVFC_ABORT_TIMEOUT
;
2275 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2277 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2278 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2285 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2286 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
2287 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2291 if (vhost
->state
== IBMVFC_ACTIVE
) {
2292 evt
= ibmvfc_get_event(vhost
);
2293 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
2296 memset(tmf
, 0, sizeof(*tmf
));
2297 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
2298 tmf
->resp
.len
= sizeof(tmf
->rsp
);
2299 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
2300 tmf
->payload_len
= sizeof(tmf
->iu
);
2301 tmf
->resp_len
= sizeof(tmf
->rsp
);
2302 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
2303 tmf
->tgt_scsi_id
= rport
->port_id
;
2304 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
2305 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
2306 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
2307 evt
->sync_iu
= &rsp_iu
;
2309 init_completion(&evt
->comp
);
2310 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2313 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2316 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
2320 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
2321 timeout
= wait_for_completion_timeout(&evt
->comp
, timeout
);
2324 rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2326 rc
= ibmvfc_wait_for_ops(vhost
, sdev
->hostdata
, ibmvfc_match_key
);
2332 sdev_printk(KERN_INFO
, sdev
, "Cancel failed, resetting host\n");
2333 ibmvfc_reset_host(vhost
);
2339 if (rsp_iu
.cmd
.status
)
2340 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2343 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2344 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2346 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
2347 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2348 ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
2349 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2350 fc_rsp
->scsi_status
);
2353 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
2356 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2357 ibmvfc_free_event(evt
);
2358 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2363 * ibmvfc_eh_abort_handler - Abort a command
2364 * @cmd: scsi command to abort
2369 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
2371 struct scsi_device
*sdev
= cmd
->device
;
2372 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2373 int cancel_rc
, abort_rc
;
2377 fc_block_scsi_eh(cmd
);
2378 ibmvfc_wait_while_resetting(vhost
);
2379 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2380 abort_rc
= ibmvfc_abort_task_set(sdev
);
2382 if (!cancel_rc
&& !abort_rc
)
2383 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2390 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2391 * @cmd: scsi command struct
2396 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
2398 struct scsi_device
*sdev
= cmd
->device
;
2399 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2400 int cancel_rc
, reset_rc
;
2404 fc_block_scsi_eh(cmd
);
2405 ibmvfc_wait_while_resetting(vhost
);
2406 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
2407 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
2409 if (!cancel_rc
&& !reset_rc
)
2410 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2417 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2418 * @sdev: scsi device struct
2419 * @data: return code
2422 static void ibmvfc_dev_cancel_all_reset(struct scsi_device
*sdev
, void *data
)
2424 unsigned long *rc
= data
;
2425 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2429 * ibmvfc_eh_target_reset_handler - Reset the target
2430 * @cmd: scsi command struct
2435 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2437 struct scsi_device
*sdev
= cmd
->device
;
2438 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2439 struct scsi_target
*starget
= scsi_target(sdev
);
2442 unsigned long cancel_rc
= 0;
2445 fc_block_scsi_eh(cmd
);
2446 ibmvfc_wait_while_resetting(vhost
);
2447 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_reset
);
2448 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2450 if (!cancel_rc
&& !reset_rc
)
2451 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2458 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2459 * @cmd: struct scsi_cmnd having problems
2462 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2465 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2467 fc_block_scsi_eh(cmd
);
2468 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2469 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2470 return rc
? FAILED
: SUCCESS
;
2474 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2475 * @rport: rport struct
2480 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2482 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2483 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2484 struct fc_rport
*dev_rport
;
2485 struct scsi_device
*sdev
;
2489 shost_for_each_device(sdev
, shost
) {
2490 dev_rport
= starget_to_rport(scsi_target(sdev
));
2491 if (dev_rport
!= rport
)
2493 ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2494 ibmvfc_abort_task_set(sdev
);
2497 rc
= ibmvfc_wait_for_ops(vhost
, rport
, ibmvfc_match_rport
);
2500 ibmvfc_issue_fc_host_lip(shost
);
2504 static const struct {
2505 enum ibmvfc_async_event ae
;
2508 { IBMVFC_AE_ELS_PLOGI
, "PLOGI" },
2509 { IBMVFC_AE_ELS_LOGO
, "LOGO" },
2510 { IBMVFC_AE_ELS_PRLO
, "PRLO" },
2511 { IBMVFC_AE_SCN_NPORT
, "N-Port SCN" },
2512 { IBMVFC_AE_SCN_GROUP
, "Group SCN" },
2513 { IBMVFC_AE_SCN_DOMAIN
, "Domain SCN" },
2514 { IBMVFC_AE_SCN_FABRIC
, "Fabric SCN" },
2515 { IBMVFC_AE_LINK_UP
, "Link Up" },
2516 { IBMVFC_AE_LINK_DOWN
, "Link Down" },
2517 { IBMVFC_AE_LINK_DEAD
, "Link Dead" },
2518 { IBMVFC_AE_HALT
, "Halt" },
2519 { IBMVFC_AE_RESUME
, "Resume" },
2520 { IBMVFC_AE_ADAPTER_FAILED
, "Adapter Failed" },
2523 static const char *unknown_ae
= "Unknown async";
2526 * ibmvfc_get_ae_desc - Get text description for async event
2530 static const char *ibmvfc_get_ae_desc(u64 ae
)
2534 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2535 if (ae_desc
[i
].ae
== ae
)
2536 return ae_desc
[i
].desc
;
2542 * ibmvfc_handle_async - Handle an async event from the adapter
2543 * @crq: crq to process
2544 * @vhost: ibmvfc host struct
2547 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2548 struct ibmvfc_host
*vhost
)
2550 const char *desc
= ibmvfc_get_ae_desc(crq
->event
);
2551 struct ibmvfc_target
*tgt
;
2553 ibmvfc_log(vhost
, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2554 " node_name: %llx\n", desc
, crq
->scsi_id
, crq
->wwpn
, crq
->node_name
);
2556 switch (crq
->event
) {
2557 case IBMVFC_AE_RESUME
:
2558 switch (crq
->link_state
) {
2559 case IBMVFC_AE_LS_LINK_DOWN
:
2560 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2562 case IBMVFC_AE_LS_LINK_DEAD
:
2563 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2565 case IBMVFC_AE_LS_LINK_UP
:
2566 case IBMVFC_AE_LS_LINK_BOUNCED
:
2568 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2569 vhost
->delay_init
= 1;
2570 __ibmvfc_reset_host(vhost
);
2575 case IBMVFC_AE_LINK_UP
:
2576 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2577 vhost
->delay_init
= 1;
2578 __ibmvfc_reset_host(vhost
);
2580 case IBMVFC_AE_SCN_FABRIC
:
2581 case IBMVFC_AE_SCN_DOMAIN
:
2582 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2583 vhost
->delay_init
= 1;
2584 __ibmvfc_reset_host(vhost
);
2586 case IBMVFC_AE_SCN_NPORT
:
2587 case IBMVFC_AE_SCN_GROUP
:
2588 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2589 ibmvfc_reinit_host(vhost
);
2591 case IBMVFC_AE_ELS_LOGO
:
2592 case IBMVFC_AE_ELS_PRLO
:
2593 case IBMVFC_AE_ELS_PLOGI
:
2594 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
2595 if (!crq
->scsi_id
&& !crq
->wwpn
&& !crq
->node_name
)
2597 if (crq
->scsi_id
&& tgt
->scsi_id
!= crq
->scsi_id
)
2599 if (crq
->wwpn
&& tgt
->ids
.port_name
!= crq
->wwpn
)
2601 if (crq
->node_name
&& tgt
->ids
.node_name
!= crq
->node_name
)
2603 if (tgt
->need_login
&& crq
->event
== IBMVFC_AE_ELS_LOGO
)
2605 if (!tgt
->need_login
|| crq
->event
== IBMVFC_AE_ELS_PLOGI
) {
2606 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2607 ibmvfc_reinit_host(vhost
);
2611 case IBMVFC_AE_LINK_DOWN
:
2612 case IBMVFC_AE_ADAPTER_FAILED
:
2613 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2615 case IBMVFC_AE_LINK_DEAD
:
2616 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2618 case IBMVFC_AE_HALT
:
2619 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2622 dev_err(vhost
->dev
, "Unknown async event received: %lld\n", crq
->event
);
2628 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2629 * @crq: Command/Response queue
2630 * @vhost: ibmvfc host struct
2633 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2636 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)crq
->ioba
;
2638 switch (crq
->valid
) {
2639 case IBMVFC_CRQ_INIT_RSP
:
2640 switch (crq
->format
) {
2641 case IBMVFC_CRQ_INIT
:
2642 dev_info(vhost
->dev
, "Partner initialized\n");
2643 /* Send back a response */
2644 rc
= ibmvfc_send_crq_init_complete(vhost
);
2646 ibmvfc_init_host(vhost
);
2648 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2650 case IBMVFC_CRQ_INIT_COMPLETE
:
2651 dev_info(vhost
->dev
, "Partner initialization complete\n");
2652 ibmvfc_init_host(vhost
);
2655 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2658 case IBMVFC_CRQ_XPORT_EVENT
:
2659 vhost
->state
= IBMVFC_NO_CRQ
;
2660 vhost
->logged_in
= 0;
2661 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2662 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2663 /* We need to re-setup the interpartition connection */
2664 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2665 vhost
->client_migrated
= 1;
2666 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2667 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2668 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_REENABLE
);
2670 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2671 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2672 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2673 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_RESET
);
2676 case IBMVFC_CRQ_CMD_RSP
:
2679 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2683 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2686 /* The only kind of payload CRQs we should get are responses to
2687 * things we send. Make sure this response is to something we
2690 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2691 dev_err(vhost
->dev
, "Returned correlation_token 0x%08llx is invalid!\n",
2696 if (unlikely(atomic_read(&evt
->free
))) {
2697 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08llx!\n",
2702 del_timer(&evt
->timer
);
2703 list_del(&evt
->queue
);
2704 ibmvfc_trc_end(evt
);
2709 * ibmvfc_scan_finished - Check if the device scan is done.
2710 * @shost: scsi host struct
2711 * @time: current elapsed time
2714 * 0 if scan is not done / 1 if scan is done
2716 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2718 unsigned long flags
;
2719 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2722 spin_lock_irqsave(shost
->host_lock
, flags
);
2723 if (time
>= (init_timeout
* HZ
)) {
2724 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2725 "continuing initialization\n", init_timeout
);
2729 if (vhost
->scan_complete
)
2731 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2736 * ibmvfc_slave_alloc - Setup the device's task set value
2737 * @sdev: struct scsi_device device to configure
2739 * Set the device's task set value so that error handling works as
2743 * 0 on success / -ENXIO if device does not exist
2745 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2747 struct Scsi_Host
*shost
= sdev
->host
;
2748 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2749 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2750 unsigned long flags
= 0;
2752 if (!rport
|| fc_remote_port_chkready(rport
))
2755 spin_lock_irqsave(shost
->host_lock
, flags
);
2756 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2757 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2762 * ibmvfc_target_alloc - Setup the target's task set value
2763 * @starget: struct scsi_target
2765 * Set the target's task set value so that error handling works as
2769 * 0 on success / -ENXIO if device does not exist
2771 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2773 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2774 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2775 unsigned long flags
= 0;
2777 spin_lock_irqsave(shost
->host_lock
, flags
);
2778 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2779 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2784 * ibmvfc_slave_configure - Configure the device
2785 * @sdev: struct scsi_device device to configure
2787 * Enable allow_restart for a device if it is a disk. Adjust the
2788 * queue_depth here also.
2793 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2795 struct Scsi_Host
*shost
= sdev
->host
;
2796 unsigned long flags
= 0;
2798 spin_lock_irqsave(shost
->host_lock
, flags
);
2799 if (sdev
->type
== TYPE_DISK
)
2800 sdev
->allow_restart
= 1;
2802 if (sdev
->tagged_supported
) {
2803 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
2804 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2806 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2807 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2812 * ibmvfc_change_queue_depth - Change the device's queue depth
2813 * @sdev: scsi device struct
2814 * @qdepth: depth to set
2815 * @reason: calling context
2820 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
,
2823 if (reason
!= SCSI_QDEPTH_DEFAULT
)
2826 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2827 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2829 scsi_adjust_queue_depth(sdev
, 0, qdepth
);
2830 return sdev
->queue_depth
;
2834 * ibmvfc_change_queue_type - Change the device's queue type
2835 * @sdev: scsi device struct
2836 * @tag_type: type of tags to use
2839 * actual queue type set
2841 static int ibmvfc_change_queue_type(struct scsi_device
*sdev
, int tag_type
)
2843 if (sdev
->tagged_supported
) {
2844 scsi_set_tag_type(sdev
, tag_type
);
2847 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2849 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2856 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2857 struct device_attribute
*attr
, char *buf
)
2859 struct Scsi_Host
*shost
= class_to_shost(dev
);
2860 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2862 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2863 vhost
->login_buf
->resp
.partition_name
);
2866 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2867 struct device_attribute
*attr
, char *buf
)
2869 struct Scsi_Host
*shost
= class_to_shost(dev
);
2870 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2872 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2873 vhost
->login_buf
->resp
.device_name
);
2876 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2877 struct device_attribute
*attr
, char *buf
)
2879 struct Scsi_Host
*shost
= class_to_shost(dev
);
2880 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2882 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2883 vhost
->login_buf
->resp
.port_loc_code
);
2886 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2887 struct device_attribute
*attr
, char *buf
)
2889 struct Scsi_Host
*shost
= class_to_shost(dev
);
2890 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2892 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2893 vhost
->login_buf
->resp
.drc_name
);
2896 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2897 struct device_attribute
*attr
, char *buf
)
2899 struct Scsi_Host
*shost
= class_to_shost(dev
);
2900 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2901 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2904 static ssize_t
ibmvfc_show_host_capabilities(struct device
*dev
,
2905 struct device_attribute
*attr
, char *buf
)
2907 struct Scsi_Host
*shost
= class_to_shost(dev
);
2908 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2909 return snprintf(buf
, PAGE_SIZE
, "%llx\n", vhost
->login_buf
->resp
.capabilities
);
2913 * ibmvfc_show_log_level - Show the adapter's error logging level
2914 * @dev: class device struct
2918 * number of bytes printed to buffer
2920 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2921 struct device_attribute
*attr
, char *buf
)
2923 struct Scsi_Host
*shost
= class_to_shost(dev
);
2924 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2925 unsigned long flags
= 0;
2928 spin_lock_irqsave(shost
->host_lock
, flags
);
2929 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2930 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2935 * ibmvfc_store_log_level - Change the adapter's error logging level
2936 * @dev: class device struct
2940 * number of bytes printed to buffer
2942 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
2943 struct device_attribute
*attr
,
2944 const char *buf
, size_t count
)
2946 struct Scsi_Host
*shost
= class_to_shost(dev
);
2947 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2948 unsigned long flags
= 0;
2950 spin_lock_irqsave(shost
->host_lock
, flags
);
2951 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
2952 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2956 static DEVICE_ATTR(partition_name
, S_IRUGO
, ibmvfc_show_host_partition_name
, NULL
);
2957 static DEVICE_ATTR(device_name
, S_IRUGO
, ibmvfc_show_host_device_name
, NULL
);
2958 static DEVICE_ATTR(port_loc_code
, S_IRUGO
, ibmvfc_show_host_loc_code
, NULL
);
2959 static DEVICE_ATTR(drc_name
, S_IRUGO
, ibmvfc_show_host_drc_name
, NULL
);
2960 static DEVICE_ATTR(npiv_version
, S_IRUGO
, ibmvfc_show_host_npiv_version
, NULL
);
2961 static DEVICE_ATTR(capabilities
, S_IRUGO
, ibmvfc_show_host_capabilities
, NULL
);
2962 static DEVICE_ATTR(log_level
, S_IRUGO
| S_IWUSR
,
2963 ibmvfc_show_log_level
, ibmvfc_store_log_level
);
2965 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2967 * ibmvfc_read_trace - Dump the adapter trace
2968 * @filp: open sysfs file
2969 * @kobj: kobject struct
2970 * @bin_attr: bin_attribute struct
2973 * @count: buffer size
2976 * number of bytes printed to buffer
2978 static ssize_t
ibmvfc_read_trace(struct file
*filp
, struct kobject
*kobj
,
2979 struct bin_attribute
*bin_attr
,
2980 char *buf
, loff_t off
, size_t count
)
2982 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
2983 struct Scsi_Host
*shost
= class_to_shost(dev
);
2984 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2985 unsigned long flags
= 0;
2986 int size
= IBMVFC_TRACE_SIZE
;
2987 char *src
= (char *)vhost
->trace
;
2991 if (off
+ count
> size
) {
2996 spin_lock_irqsave(shost
->host_lock
, flags
);
2997 memcpy(buf
, &src
[off
], count
);
2998 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3002 static struct bin_attribute ibmvfc_trace_attr
= {
3008 .read
= ibmvfc_read_trace
,
3012 static struct device_attribute
*ibmvfc_attrs
[] = {
3013 &dev_attr_partition_name
,
3014 &dev_attr_device_name
,
3015 &dev_attr_port_loc_code
,
3017 &dev_attr_npiv_version
,
3018 &dev_attr_capabilities
,
3019 &dev_attr_log_level
,
3023 static struct scsi_host_template driver_template
= {
3024 .module
= THIS_MODULE
,
3025 .name
= "IBM POWER Virtual FC Adapter",
3026 .proc_name
= IBMVFC_NAME
,
3027 .queuecommand
= ibmvfc_queuecommand
,
3028 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
3029 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
3030 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
3031 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
3032 .slave_alloc
= ibmvfc_slave_alloc
,
3033 .slave_configure
= ibmvfc_slave_configure
,
3034 .target_alloc
= ibmvfc_target_alloc
,
3035 .scan_finished
= ibmvfc_scan_finished
,
3036 .change_queue_depth
= ibmvfc_change_queue_depth
,
3037 .change_queue_type
= ibmvfc_change_queue_type
,
3039 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
3041 .sg_tablesize
= SG_ALL
,
3042 .max_sectors
= IBMVFC_MAX_SECTORS
,
3043 .use_clustering
= ENABLE_CLUSTERING
,
3044 .shost_attrs
= ibmvfc_attrs
,
3048 * ibmvfc_next_async_crq - Returns the next entry in async queue
3049 * @vhost: ibmvfc host struct
3052 * Pointer to next entry in queue / NULL if empty
3054 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
3056 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
3057 struct ibmvfc_async_crq
*crq
;
3059 crq
= &async_crq
->msgs
[async_crq
->cur
];
3060 if (crq
->valid
& 0x80) {
3061 if (++async_crq
->cur
== async_crq
->size
)
3071 * ibmvfc_next_crq - Returns the next entry in message queue
3072 * @vhost: ibmvfc host struct
3075 * Pointer to next entry in queue / NULL if empty
3077 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
3079 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
3080 struct ibmvfc_crq
*crq
;
3082 crq
= &queue
->msgs
[queue
->cur
];
3083 if (crq
->valid
& 0x80) {
3084 if (++queue
->cur
== queue
->size
)
3094 * ibmvfc_interrupt - Interrupt handler
3095 * @irq: number of irq to handle, not used
3096 * @dev_instance: ibmvfc_host that received interrupt
3101 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
3103 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
3104 unsigned long flags
;
3106 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3107 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
3108 tasklet_schedule(&vhost
->tasklet
);
3109 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3114 * ibmvfc_tasklet - Interrupt handler tasklet
3115 * @data: ibmvfc host struct
3120 static void ibmvfc_tasklet(void *data
)
3122 struct ibmvfc_host
*vhost
= data
;
3123 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
3124 struct ibmvfc_crq
*crq
;
3125 struct ibmvfc_async_crq
*async
;
3126 unsigned long flags
;
3129 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3131 /* Pull all the valid messages off the async CRQ */
3132 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3133 ibmvfc_handle_async(async
, vhost
);
3138 /* Pull all the valid messages off the CRQ */
3139 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3140 ibmvfc_handle_crq(crq
, vhost
);
3145 vio_enable_interrupts(vdev
);
3146 if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3147 vio_disable_interrupts(vdev
);
3148 ibmvfc_handle_async(async
, vhost
);
3151 } else if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3152 vio_disable_interrupts(vdev
);
3153 ibmvfc_handle_crq(crq
, vhost
);
3160 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3164 * ibmvfc_init_tgt - Set the next init job step for the target
3165 * @tgt: ibmvfc target struct
3166 * @job_step: job step to perform
3169 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
3170 void (*job_step
) (struct ibmvfc_target
*))
3172 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
3173 tgt
->job_step
= job_step
;
3174 wake_up(&tgt
->vhost
->work_wait_q
);
3178 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3179 * @tgt: ibmvfc target struct
3180 * @job_step: initialization job step
3182 * Returns: 1 if step will be retried / 0 if not
3185 static int ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
3186 void (*job_step
) (struct ibmvfc_target
*))
3188 if (++tgt
->init_retries
> IBMVFC_MAX_TGT_INIT_RETRIES
) {
3189 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3190 wake_up(&tgt
->vhost
->work_wait_q
);
3193 ibmvfc_init_tgt(tgt
, job_step
);
3197 /* Defined in FC-LS */
3198 static const struct {
3215 * ibmvfc_get_prli_rsp - Find PRLI response index
3216 * @flags: PRLI response flags
3219 static int ibmvfc_get_prli_rsp(u16 flags
)
3222 int code
= (flags
& 0x0f00) >> 8;
3224 for (i
= 0; i
< ARRAY_SIZE(prli_rsp
); i
++)
3225 if (prli_rsp
[i
].code
== code
)
3232 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3233 * @evt: ibmvfc event struct
3236 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
3238 struct ibmvfc_target
*tgt
= evt
->tgt
;
3239 struct ibmvfc_host
*vhost
= evt
->vhost
;
3240 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
3241 struct ibmvfc_prli_svc_parms
*parms
= &rsp
->parms
;
3242 u32 status
= rsp
->common
.status
;
3243 int index
, level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3245 vhost
->discovery_threads
--;
3246 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3248 case IBMVFC_MAD_SUCCESS
:
3249 tgt_dbg(tgt
, "Process Login succeeded: %X %02X %04X\n",
3250 parms
->type
, parms
->flags
, parms
->service_parms
);
3252 if (parms
->type
== IBMVFC_SCSI_FCP_TYPE
) {
3253 index
= ibmvfc_get_prli_rsp(parms
->flags
);
3254 if (prli_rsp
[index
].logged_in
) {
3255 if (parms
->flags
& IBMVFC_PRLI_EST_IMG_PAIR
) {
3256 tgt
->need_login
= 0;
3258 if (parms
->service_parms
& IBMVFC_PRLI_TARGET_FUNC
)
3259 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_TARGET
;
3260 if (parms
->service_parms
& IBMVFC_PRLI_INITIATOR_FUNC
)
3261 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_INITIATOR
;
3264 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3265 } else if (prli_rsp
[index
].retry
)
3266 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3268 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3270 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3272 case IBMVFC_MAD_DRIVER_FAILED
:
3274 case IBMVFC_MAD_CRQ_ERROR
:
3275 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3277 case IBMVFC_MAD_FAILED
:
3279 if ((rsp
->status
& IBMVFC_VIOS_FAILURE
) && rsp
->error
== IBMVFC_PLOGI_REQUIRED
)
3280 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3281 else if (tgt
->logo_rcvd
)
3282 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3283 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3284 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3286 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3288 tgt_log(tgt
, level
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3289 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
),
3290 rsp
->status
, rsp
->error
, status
);
3294 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3295 ibmvfc_free_event(evt
);
3296 wake_up(&vhost
->work_wait_q
);
3300 * ibmvfc_tgt_send_prli - Send a process login
3301 * @tgt: ibmvfc target struct
3304 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
3306 struct ibmvfc_process_login
*prli
;
3307 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3308 struct ibmvfc_event
*evt
;
3310 if (vhost
->discovery_threads
>= disc_threads
)
3313 kref_get(&tgt
->kref
);
3314 evt
= ibmvfc_get_event(vhost
);
3315 vhost
->discovery_threads
++;
3316 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
3318 prli
= &evt
->iu
.prli
;
3319 memset(prli
, 0, sizeof(*prli
));
3320 prli
->common
.version
= 1;
3321 prli
->common
.opcode
= IBMVFC_PROCESS_LOGIN
;
3322 prli
->common
.length
= sizeof(*prli
);
3323 prli
->scsi_id
= tgt
->scsi_id
;
3325 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
3326 prli
->parms
.flags
= IBMVFC_PRLI_EST_IMG_PAIR
;
3327 prli
->parms
.service_parms
= IBMVFC_PRLI_INITIATOR_FUNC
;
3329 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3330 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3331 vhost
->discovery_threads
--;
3332 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3333 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3335 tgt_dbg(tgt
, "Sent process login\n");
3339 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3340 * @evt: ibmvfc event struct
3343 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
3345 struct ibmvfc_target
*tgt
= evt
->tgt
;
3346 struct ibmvfc_host
*vhost
= evt
->vhost
;
3347 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
3348 u32 status
= rsp
->common
.status
;
3349 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3351 vhost
->discovery_threads
--;
3352 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3354 case IBMVFC_MAD_SUCCESS
:
3355 tgt_dbg(tgt
, "Port Login succeeded\n");
3356 if (tgt
->ids
.port_name
&&
3357 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
3359 tgt_dbg(tgt
, "Port re-init required\n");
3362 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
3363 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
3364 tgt
->ids
.port_id
= tgt
->scsi_id
;
3365 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
3366 sizeof(tgt
->service_parms
));
3367 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
3368 sizeof(tgt
->service_parms_change
));
3369 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
3371 case IBMVFC_MAD_DRIVER_FAILED
:
3373 case IBMVFC_MAD_CRQ_ERROR
:
3374 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3376 case IBMVFC_MAD_FAILED
:
3378 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3379 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3381 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3383 tgt_log(tgt
, level
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3384 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3385 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3386 ibmvfc_get_ls_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3390 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3391 ibmvfc_free_event(evt
);
3392 wake_up(&vhost
->work_wait_q
);
3396 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3397 * @tgt: ibmvfc target struct
3400 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
3402 struct ibmvfc_port_login
*plogi
;
3403 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3404 struct ibmvfc_event
*evt
;
3406 if (vhost
->discovery_threads
>= disc_threads
)
3409 kref_get(&tgt
->kref
);
3411 evt
= ibmvfc_get_event(vhost
);
3412 vhost
->discovery_threads
++;
3413 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3414 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
3416 plogi
= &evt
->iu
.plogi
;
3417 memset(plogi
, 0, sizeof(*plogi
));
3418 plogi
->common
.version
= 1;
3419 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
3420 plogi
->common
.length
= sizeof(*plogi
);
3421 plogi
->scsi_id
= tgt
->scsi_id
;
3423 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3424 vhost
->discovery_threads
--;
3425 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3426 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3428 tgt_dbg(tgt
, "Sent port login\n");
3432 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3433 * @evt: ibmvfc event struct
3436 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
3438 struct ibmvfc_target
*tgt
= evt
->tgt
;
3439 struct ibmvfc_host
*vhost
= evt
->vhost
;
3440 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
3441 u32 status
= rsp
->common
.status
;
3443 vhost
->discovery_threads
--;
3444 ibmvfc_free_event(evt
);
3445 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3448 case IBMVFC_MAD_SUCCESS
:
3449 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
3451 case IBMVFC_MAD_DRIVER_FAILED
:
3452 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3453 wake_up(&vhost
->work_wait_q
);
3455 case IBMVFC_MAD_FAILED
:
3457 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
3461 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
3462 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
3463 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
3464 tgt
->scsi_id
!= tgt
->new_scsi_id
)
3465 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3466 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3467 wake_up(&vhost
->work_wait_q
);
3471 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3472 * @tgt: ibmvfc target struct
3475 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
3477 struct ibmvfc_implicit_logout
*mad
;
3478 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3479 struct ibmvfc_event
*evt
;
3481 if (vhost
->discovery_threads
>= disc_threads
)
3484 kref_get(&tgt
->kref
);
3485 evt
= ibmvfc_get_event(vhost
);
3486 vhost
->discovery_threads
++;
3487 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
3489 mad
= &evt
->iu
.implicit_logout
;
3490 memset(mad
, 0, sizeof(*mad
));
3491 mad
->common
.version
= 1;
3492 mad
->common
.opcode
= IBMVFC_IMPLICIT_LOGOUT
;
3493 mad
->common
.length
= sizeof(*mad
);
3494 mad
->old_scsi_id
= tgt
->scsi_id
;
3496 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3497 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3498 vhost
->discovery_threads
--;
3499 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3500 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3502 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3506 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3507 * @mad: ibmvfc passthru mad struct
3508 * @tgt: ibmvfc target struct
3511 * 1 if PLOGI needed / 0 if PLOGI not needed
3513 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3514 struct ibmvfc_target
*tgt
)
3516 if (memcmp(&mad
->fc_iu
.response
[2], &tgt
->ids
.port_name
,
3517 sizeof(tgt
->ids
.port_name
)))
3519 if (memcmp(&mad
->fc_iu
.response
[4], &tgt
->ids
.node_name
,
3520 sizeof(tgt
->ids
.node_name
)))
3522 if (mad
->fc_iu
.response
[6] != tgt
->scsi_id
)
3528 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3529 * @evt: ibmvfc event struct
3532 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3534 struct ibmvfc_target
*tgt
= evt
->tgt
;
3535 struct ibmvfc_host
*vhost
= evt
->vhost
;
3536 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3537 u32 status
= mad
->common
.status
;
3538 u8 fc_reason
, fc_explain
;
3540 vhost
->discovery_threads
--;
3541 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3542 del_timer(&tgt
->timer
);
3545 case IBMVFC_MAD_SUCCESS
:
3546 tgt_dbg(tgt
, "ADISC succeeded\n");
3547 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3548 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3550 case IBMVFC_MAD_DRIVER_FAILED
:
3552 case IBMVFC_MAD_FAILED
:
3554 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3555 fc_reason
= (mad
->fc_iu
.response
[1] & 0x00ff0000) >> 16;
3556 fc_explain
= (mad
->fc_iu
.response
[1] & 0x0000ff00) >> 8;
3557 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3558 ibmvfc_get_cmd_error(mad
->iu
.status
, mad
->iu
.error
),
3559 mad
->iu
.status
, mad
->iu
.error
,
3560 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3561 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3565 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3566 ibmvfc_free_event(evt
);
3567 wake_up(&vhost
->work_wait_q
);
3571 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3572 * @evt: ibmvfc event struct
3575 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3577 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3579 memset(mad
, 0, sizeof(*mad
));
3580 mad
->common
.version
= 1;
3581 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
3582 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
3583 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
3584 offsetof(struct ibmvfc_passthru_mad
, iu
);
3585 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
3586 mad
->iu
.cmd_len
= sizeof(mad
->fc_iu
.payload
);
3587 mad
->iu
.rsp_len
= sizeof(mad
->fc_iu
.response
);
3588 mad
->iu
.cmd
.va
= (u64
)evt
->crq
.ioba
+
3589 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3590 offsetof(struct ibmvfc_passthru_fc_iu
, payload
);
3591 mad
->iu
.cmd
.len
= sizeof(mad
->fc_iu
.payload
);
3592 mad
->iu
.rsp
.va
= (u64
)evt
->crq
.ioba
+
3593 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3594 offsetof(struct ibmvfc_passthru_fc_iu
, response
);
3595 mad
->iu
.rsp
.len
= sizeof(mad
->fc_iu
.response
);
3599 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3600 * @evt: ibmvfc event struct
3602 * Just cleanup this event struct. Everything else is handled by
3603 * the ADISC completion handler. If the ADISC never actually comes
3604 * back, we still have the timer running on the ADISC event struct
3605 * which will fire and cause the CRQ to get reset.
3608 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event
*evt
)
3610 struct ibmvfc_host
*vhost
= evt
->vhost
;
3611 struct ibmvfc_target
*tgt
= evt
->tgt
;
3613 tgt_dbg(tgt
, "ADISC cancel complete\n");
3614 vhost
->abort_threads
--;
3615 ibmvfc_free_event(evt
);
3616 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3617 wake_up(&vhost
->work_wait_q
);
3621 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3622 * @tgt: ibmvfc target struct
3624 * If an ADISC times out, send a cancel. If the cancel times
3625 * out, reset the CRQ. When the ADISC comes back as cancelled,
3626 * log back into the target.
3628 static void ibmvfc_adisc_timeout(struct ibmvfc_target
*tgt
)
3630 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3631 struct ibmvfc_event
*evt
;
3632 struct ibmvfc_tmf
*tmf
;
3633 unsigned long flags
;
3636 tgt_dbg(tgt
, "ADISC timeout\n");
3637 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3638 if (vhost
->abort_threads
>= disc_threads
||
3639 tgt
->action
!= IBMVFC_TGT_ACTION_INIT_WAIT
||
3640 vhost
->state
!= IBMVFC_INITIALIZING
||
3641 vhost
->action
!= IBMVFC_HOST_ACTION_QUERY_TGTS
) {
3642 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3646 vhost
->abort_threads
++;
3647 kref_get(&tgt
->kref
);
3648 evt
= ibmvfc_get_event(vhost
);
3649 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_cancel_done
, IBMVFC_MAD_FORMAT
);
3653 memset(tmf
, 0, sizeof(*tmf
));
3654 tmf
->common
.version
= 1;
3655 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
3656 tmf
->common
.length
= sizeof(*tmf
);
3657 tmf
->scsi_id
= tgt
->scsi_id
;
3658 tmf
->cancel_key
= tgt
->cancel_key
;
3660 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
3663 tgt_err(tgt
, "Failed to send cancel event for ADISC. rc=%d\n", rc
);
3664 vhost
->abort_threads
--;
3665 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3666 __ibmvfc_reset_host(vhost
);
3668 tgt_dbg(tgt
, "Attempting to cancel ADISC\n");
3669 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3673 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3674 * @tgt: ibmvfc target struct
3676 * When sending an ADISC we end up with two timers running. The
3677 * first timer is the timer in the ibmvfc target struct. If this
3678 * fires, we send a cancel to the target. The second timer is the
3679 * timer on the ibmvfc event for the ADISC, which is longer. If that
3680 * fires, it means the ADISC timed out and our attempt to cancel it
3681 * also failed, so we need to reset the CRQ.
3683 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3685 struct ibmvfc_passthru_mad
*mad
;
3686 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3687 struct ibmvfc_event
*evt
;
3689 if (vhost
->discovery_threads
>= disc_threads
)
3692 kref_get(&tgt
->kref
);
3693 evt
= ibmvfc_get_event(vhost
);
3694 vhost
->discovery_threads
++;
3695 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3698 ibmvfc_init_passthru(evt
);
3699 mad
= &evt
->iu
.passthru
;
3700 mad
->iu
.flags
= IBMVFC_FC_ELS
;
3701 mad
->iu
.scsi_id
= tgt
->scsi_id
;
3702 mad
->iu
.cancel_key
= tgt
->cancel_key
;
3704 mad
->fc_iu
.payload
[0] = IBMVFC_ADISC
;
3705 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3706 sizeof(vhost
->login_buf
->resp
.port_name
));
3707 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3708 sizeof(vhost
->login_buf
->resp
.node_name
));
3709 mad
->fc_iu
.payload
[6] = vhost
->login_buf
->resp
.scsi_id
& 0x00ffffff;
3711 if (timer_pending(&tgt
->timer
))
3712 mod_timer(&tgt
->timer
, jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
));
3714 tgt
->timer
.data
= (unsigned long) tgt
;
3715 tgt
->timer
.expires
= jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
);
3716 tgt
->timer
.function
= (void (*)(unsigned long))ibmvfc_adisc_timeout
;
3717 add_timer(&tgt
->timer
);
3720 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3721 if (ibmvfc_send_event(evt
, vhost
, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT
)) {
3722 vhost
->discovery_threads
--;
3723 del_timer(&tgt
->timer
);
3724 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3725 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3727 tgt_dbg(tgt
, "Sent ADISC\n");
3731 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3732 * @evt: ibmvfc event struct
3735 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3737 struct ibmvfc_target
*tgt
= evt
->tgt
;
3738 struct ibmvfc_host
*vhost
= evt
->vhost
;
3739 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3740 u32 status
= rsp
->common
.status
;
3741 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3743 vhost
->discovery_threads
--;
3744 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3746 case IBMVFC_MAD_SUCCESS
:
3747 tgt_dbg(tgt
, "Query Target succeeded\n");
3748 tgt
->new_scsi_id
= rsp
->scsi_id
;
3749 if (rsp
->scsi_id
!= tgt
->scsi_id
)
3750 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3752 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3754 case IBMVFC_MAD_DRIVER_FAILED
:
3756 case IBMVFC_MAD_CRQ_ERROR
:
3757 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3759 case IBMVFC_MAD_FAILED
:
3761 if ((rsp
->status
& IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3762 rsp
->error
== IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3763 rsp
->fc_explain
== IBMVFC_PORT_NAME_NOT_REG
)
3764 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3765 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3766 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3768 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3770 tgt_log(tgt
, level
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3771 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3772 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3773 ibmvfc_get_gs_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3777 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3778 ibmvfc_free_event(evt
);
3779 wake_up(&vhost
->work_wait_q
);
3783 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3784 * @tgt: ibmvfc target struct
3787 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3789 struct ibmvfc_query_tgt
*query_tgt
;
3790 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3791 struct ibmvfc_event
*evt
;
3793 if (vhost
->discovery_threads
>= disc_threads
)
3796 kref_get(&tgt
->kref
);
3797 evt
= ibmvfc_get_event(vhost
);
3798 vhost
->discovery_threads
++;
3800 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3801 query_tgt
= &evt
->iu
.query_tgt
;
3802 memset(query_tgt
, 0, sizeof(*query_tgt
));
3803 query_tgt
->common
.version
= 1;
3804 query_tgt
->common
.opcode
= IBMVFC_QUERY_TARGET
;
3805 query_tgt
->common
.length
= sizeof(*query_tgt
);
3806 query_tgt
->wwpn
= tgt
->ids
.port_name
;
3808 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3809 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3810 vhost
->discovery_threads
--;
3811 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3812 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3814 tgt_dbg(tgt
, "Sent Query Target\n");
3818 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3819 * @vhost: ibmvfc host struct
3820 * @scsi_id: SCSI ID to allocate target for
3823 * 0 on success / other on failure
3825 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3827 struct ibmvfc_target
*tgt
;
3828 unsigned long flags
;
3830 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3831 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3832 if (tgt
->scsi_id
== scsi_id
) {
3833 if (tgt
->need_login
)
3834 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3838 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3840 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_NOIO
);
3842 dev_err(vhost
->dev
, "Target allocation failure for scsi id %08llx\n",
3847 memset(tgt
, 0, sizeof(*tgt
));
3848 tgt
->scsi_id
= scsi_id
;
3849 tgt
->new_scsi_id
= scsi_id
;
3851 tgt
->need_login
= 1;
3852 tgt
->cancel_key
= vhost
->task_set
++;
3853 init_timer(&tgt
->timer
);
3854 kref_init(&tgt
->kref
);
3855 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3856 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3857 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3860 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3865 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3866 * @vhost: ibmvfc host struct
3869 * 0 on success / other on failure
3871 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3875 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3876 rc
= ibmvfc_alloc_target(vhost
,
3877 vhost
->disc_buf
->scsi_id
[i
] & IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3883 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3884 * @evt: ibmvfc event struct
3887 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3889 struct ibmvfc_host
*vhost
= evt
->vhost
;
3890 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3891 u32 mad_status
= rsp
->common
.status
;
3892 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3894 switch (mad_status
) {
3895 case IBMVFC_MAD_SUCCESS
:
3896 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3897 vhost
->num_targets
= rsp
->num_written
;
3898 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3900 case IBMVFC_MAD_FAILED
:
3901 level
+= ibmvfc_retry_host_init(vhost
);
3902 ibmvfc_log(vhost
, level
, "Discover Targets failed: %s (%x:%x)\n",
3903 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3905 case IBMVFC_MAD_DRIVER_FAILED
:
3908 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3909 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3913 ibmvfc_free_event(evt
);
3914 wake_up(&vhost
->work_wait_q
);
3918 * ibmvfc_discover_targets - Send Discover Targets MAD
3919 * @vhost: ibmvfc host struct
3922 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3924 struct ibmvfc_discover_targets
*mad
;
3925 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3927 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3928 mad
= &evt
->iu
.discover_targets
;
3929 memset(mad
, 0, sizeof(*mad
));
3930 mad
->common
.version
= 1;
3931 mad
->common
.opcode
= IBMVFC_DISC_TARGETS
;
3932 mad
->common
.length
= sizeof(*mad
);
3933 mad
->bufflen
= vhost
->disc_buf_sz
;
3934 mad
->buffer
.va
= vhost
->disc_buf_dma
;
3935 mad
->buffer
.len
= vhost
->disc_buf_sz
;
3936 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3938 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3939 ibmvfc_dbg(vhost
, "Sent discover targets\n");
3941 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3945 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3946 * @evt: ibmvfc event struct
3949 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
3951 struct ibmvfc_host
*vhost
= evt
->vhost
;
3952 u32 mad_status
= evt
->xfer_iu
->npiv_login
.common
.status
;
3953 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
3954 unsigned int npiv_max_sectors
;
3955 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3957 switch (mad_status
) {
3958 case IBMVFC_MAD_SUCCESS
:
3959 ibmvfc_free_event(evt
);
3961 case IBMVFC_MAD_FAILED
:
3962 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3963 level
+= ibmvfc_retry_host_init(vhost
);
3965 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3966 ibmvfc_log(vhost
, level
, "NPIV Login failed: %s (%x:%x)\n",
3967 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3968 ibmvfc_free_event(evt
);
3970 case IBMVFC_MAD_CRQ_ERROR
:
3971 ibmvfc_retry_host_init(vhost
);
3972 case IBMVFC_MAD_DRIVER_FAILED
:
3973 ibmvfc_free_event(evt
);
3976 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
3977 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3978 ibmvfc_free_event(evt
);
3982 vhost
->client_migrated
= 0;
3984 if (!(rsp
->flags
& IBMVFC_NATIVE_FC
)) {
3985 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
3987 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3988 wake_up(&vhost
->work_wait_q
);
3992 if (rsp
->max_cmds
<= IBMVFC_NUM_INTERNAL_REQ
) {
3993 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
3995 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3996 wake_up(&vhost
->work_wait_q
);
4000 vhost
->logged_in
= 1;
4001 npiv_max_sectors
= min((uint
)(rsp
->max_dma_len
>> 9), IBMVFC_MAX_SECTORS
);
4002 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
4003 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
4004 rsp
->drc_name
, npiv_max_sectors
);
4006 fc_host_fabric_name(vhost
->host
) = rsp
->node_name
;
4007 fc_host_node_name(vhost
->host
) = rsp
->node_name
;
4008 fc_host_port_name(vhost
->host
) = rsp
->port_name
;
4009 fc_host_port_id(vhost
->host
) = rsp
->scsi_id
;
4010 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
4011 fc_host_supported_classes(vhost
->host
) = 0;
4012 if (rsp
->service_parms
.class1_parms
[0] & 0x80000000)
4013 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
4014 if (rsp
->service_parms
.class2_parms
[0] & 0x80000000)
4015 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
4016 if (rsp
->service_parms
.class3_parms
[0] & 0x80000000)
4017 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
4018 fc_host_maxframe_size(vhost
->host
) =
4019 rsp
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
4021 vhost
->host
->can_queue
= rsp
->max_cmds
- IBMVFC_NUM_INTERNAL_REQ
;
4022 vhost
->host
->max_sectors
= npiv_max_sectors
;
4023 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4024 wake_up(&vhost
->work_wait_q
);
4028 * ibmvfc_npiv_login - Sends NPIV login
4029 * @vhost: ibmvfc host struct
4032 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
4034 struct ibmvfc_npiv_login_mad
*mad
;
4035 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
4037 ibmvfc_gather_partition_info(vhost
);
4038 ibmvfc_set_login_info(vhost
);
4039 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
4041 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
4042 mad
= &evt
->iu
.npiv_login
;
4043 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
4044 mad
->common
.version
= 1;
4045 mad
->common
.opcode
= IBMVFC_NPIV_LOGIN
;
4046 mad
->common
.length
= sizeof(struct ibmvfc_npiv_login_mad
);
4047 mad
->buffer
.va
= vhost
->login_buf_dma
;
4048 mad
->buffer
.len
= sizeof(*vhost
->login_buf
);
4050 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
4052 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4053 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
4055 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4059 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4060 * @vhost: ibmvfc host struct
4063 static void ibmvfc_npiv_logout_done(struct ibmvfc_event
*evt
)
4065 struct ibmvfc_host
*vhost
= evt
->vhost
;
4066 u32 mad_status
= evt
->xfer_iu
->npiv_logout
.common
.status
;
4068 ibmvfc_free_event(evt
);
4070 switch (mad_status
) {
4071 case IBMVFC_MAD_SUCCESS
:
4072 if (list_empty(&vhost
->sent
) &&
4073 vhost
->action
== IBMVFC_HOST_ACTION_LOGO_WAIT
) {
4074 ibmvfc_init_host(vhost
);
4078 case IBMVFC_MAD_FAILED
:
4079 case IBMVFC_MAD_NOT_SUPPORTED
:
4080 case IBMVFC_MAD_CRQ_ERROR
:
4081 case IBMVFC_MAD_DRIVER_FAILED
:
4083 ibmvfc_dbg(vhost
, "NPIV Logout failed. 0x%X\n", mad_status
);
4087 ibmvfc_hard_reset_host(vhost
);
4091 * ibmvfc_npiv_logout - Issue an NPIV Logout
4092 * @vhost: ibmvfc host struct
4095 static void ibmvfc_npiv_logout(struct ibmvfc_host
*vhost
)
4097 struct ibmvfc_npiv_logout_mad
*mad
;
4098 struct ibmvfc_event
*evt
;
4100 evt
= ibmvfc_get_event(vhost
);
4101 ibmvfc_init_event(evt
, ibmvfc_npiv_logout_done
, IBMVFC_MAD_FORMAT
);
4103 mad
= &evt
->iu
.npiv_logout
;
4104 memset(mad
, 0, sizeof(*mad
));
4105 mad
->common
.version
= 1;
4106 mad
->common
.opcode
= IBMVFC_NPIV_LOGOUT
;
4107 mad
->common
.length
= sizeof(struct ibmvfc_npiv_logout_mad
);
4109 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO_WAIT
);
4111 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4112 ibmvfc_dbg(vhost
, "Sent NPIV logout\n");
4114 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4118 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4119 * @vhost: ibmvfc host struct
4122 * 1 if work to do / 0 if not
4124 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
4126 struct ibmvfc_target
*tgt
;
4128 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4129 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
4130 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4138 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4139 * @vhost: ibmvfc host struct
4142 * 1 if work to do / 0 if not
4144 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4146 struct ibmvfc_target
*tgt
;
4148 if (kthread_should_stop())
4150 switch (vhost
->action
) {
4151 case IBMVFC_HOST_ACTION_NONE
:
4152 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4153 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4155 case IBMVFC_HOST_ACTION_TGT_INIT
:
4156 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4157 if (vhost
->discovery_threads
== disc_threads
)
4159 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4160 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
4162 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4163 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4166 case IBMVFC_HOST_ACTION_LOGO
:
4167 case IBMVFC_HOST_ACTION_INIT
:
4168 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4169 case IBMVFC_HOST_ACTION_TGT_DEL
:
4170 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4171 case IBMVFC_HOST_ACTION_QUERY
:
4172 case IBMVFC_HOST_ACTION_RESET
:
4173 case IBMVFC_HOST_ACTION_REENABLE
:
4182 * ibmvfc_work_to_do - Is there task level work to do?
4183 * @vhost: ibmvfc host struct
4186 * 1 if work to do / 0 if not
4188 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4190 unsigned long flags
;
4193 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4194 rc
= __ibmvfc_work_to_do(vhost
);
4195 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4200 * ibmvfc_log_ae - Log async events if necessary
4201 * @vhost: ibmvfc host struct
4202 * @events: events to log
4205 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
4207 if (events
& IBMVFC_AE_RSCN
)
4208 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
4209 if ((events
& IBMVFC_AE_LINKDOWN
) &&
4210 vhost
->state
>= IBMVFC_HALTED
)
4211 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
4212 if ((events
& IBMVFC_AE_LINKUP
) &&
4213 vhost
->state
== IBMVFC_INITIALIZING
)
4214 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
4218 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4219 * @tgt: ibmvfc target struct
4222 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
4224 struct ibmvfc_host
*vhost
= tgt
->vhost
;
4225 struct fc_rport
*rport
;
4226 unsigned long flags
;
4228 tgt_dbg(tgt
, "Adding rport\n");
4229 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
4230 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4232 if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4233 tgt_dbg(tgt
, "Deleting rport\n");
4234 list_del(&tgt
->queue
);
4235 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DELETED_RPORT
);
4236 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4237 fc_remote_port_delete(rport
);
4238 del_timer_sync(&tgt
->timer
);
4239 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4241 } else if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DELETED_RPORT
) {
4242 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4247 tgt_dbg(tgt
, "rport add succeeded\n");
4249 rport
->maxframe_size
= tgt
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
4250 rport
->supported_classes
= 0;
4251 tgt
->target_id
= rport
->scsi_target_id
;
4252 if (tgt
->service_parms
.class1_parms
[0] & 0x80000000)
4253 rport
->supported_classes
|= FC_COS_CLASS1
;
4254 if (tgt
->service_parms
.class2_parms
[0] & 0x80000000)
4255 rport
->supported_classes
|= FC_COS_CLASS2
;
4256 if (tgt
->service_parms
.class3_parms
[0] & 0x80000000)
4257 rport
->supported_classes
|= FC_COS_CLASS3
;
4259 blk_queue_max_segments(rport
->rqst_q
, 1);
4261 tgt_dbg(tgt
, "rport add failed\n");
4262 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4266 * ibmvfc_do_work - Do task level work
4267 * @vhost: ibmvfc host struct
4270 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
4272 struct ibmvfc_target
*tgt
;
4273 unsigned long flags
;
4274 struct fc_rport
*rport
;
4277 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
4278 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4279 vhost
->events_to_log
= 0;
4280 switch (vhost
->action
) {
4281 case IBMVFC_HOST_ACTION_NONE
:
4282 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4283 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4285 case IBMVFC_HOST_ACTION_RESET
:
4286 vhost
->action
= IBMVFC_HOST_ACTION_TGT_DEL
;
4287 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4288 rc
= ibmvfc_reset_crq(vhost
);
4289 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4290 if (rc
|| (rc
= ibmvfc_send_crq_init(vhost
)) ||
4291 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
4292 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4293 dev_err(vhost
->dev
, "Error after reset (rc=%d)\n", rc
);
4296 case IBMVFC_HOST_ACTION_REENABLE
:
4297 vhost
->action
= IBMVFC_HOST_ACTION_TGT_DEL
;
4298 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4299 rc
= ibmvfc_reenable_crq_queue(vhost
);
4300 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4301 if (rc
|| (rc
= ibmvfc_send_crq_init(vhost
))) {
4302 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4303 dev_err(vhost
->dev
, "Error after enable (rc=%d)\n", rc
);
4306 case IBMVFC_HOST_ACTION_LOGO
:
4307 vhost
->job_step(vhost
);
4309 case IBMVFC_HOST_ACTION_INIT
:
4310 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
4311 if (vhost
->delay_init
) {
4312 vhost
->delay_init
= 0;
4313 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4317 vhost
->job_step(vhost
);
4319 case IBMVFC_HOST_ACTION_QUERY
:
4320 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4321 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
4322 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
4324 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4325 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4326 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4332 if (!ibmvfc_dev_init_to_do(vhost
))
4333 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
4335 case IBMVFC_HOST_ACTION_TGT_DEL
:
4336 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4337 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4338 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4339 tgt_dbg(tgt
, "Deleting rport\n");
4342 list_del(&tgt
->queue
);
4343 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DELETED_RPORT
);
4344 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4346 fc_remote_port_delete(rport
);
4347 del_timer_sync(&tgt
->timer
);
4348 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4353 if (vhost
->state
== IBMVFC_INITIALIZING
) {
4354 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_DEL_FAILED
) {
4355 if (vhost
->reinit
) {
4357 scsi_block_requests(vhost
->host
);
4358 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4359 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4361 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
4362 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4363 wake_up(&vhost
->init_wait_q
);
4364 schedule_work(&vhost
->rport_add_work_q
);
4365 vhost
->init_retries
= 0;
4366 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4367 scsi_unblock_requests(vhost
->host
);
4372 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
4373 vhost
->job_step
= ibmvfc_discover_targets
;
4376 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4377 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4378 scsi_unblock_requests(vhost
->host
);
4379 wake_up(&vhost
->init_wait_q
);
4383 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4384 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
4385 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4386 ibmvfc_alloc_targets(vhost
);
4387 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4389 case IBMVFC_HOST_ACTION_TGT_INIT
:
4390 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4391 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4397 if (!ibmvfc_dev_init_to_do(vhost
))
4398 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL_FAILED
);
4404 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4408 * ibmvfc_work - Do task level work
4409 * @data: ibmvfc host struct
4414 static int ibmvfc_work(void *data
)
4416 struct ibmvfc_host
*vhost
= data
;
4419 set_user_nice(current
, -20);
4422 rc
= wait_event_interruptible(vhost
->work_wait_q
,
4423 ibmvfc_work_to_do(vhost
));
4427 if (kthread_should_stop())
4430 ibmvfc_do_work(vhost
);
4433 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
4438 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4439 * @vhost: ibmvfc host struct
4441 * Allocates a page for messages, maps it for dma, and registers
4442 * the crq with the hypervisor.
4445 * zero on success / other on failure
4447 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
4449 int rc
, retrc
= -ENOMEM
;
4450 struct device
*dev
= vhost
->dev
;
4451 struct vio_dev
*vdev
= to_vio_dev(dev
);
4452 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
4455 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
4460 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
4461 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
4462 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4464 if (dma_mapping_error(dev
, crq
->msg_token
))
4467 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
4468 crq
->msg_token
, PAGE_SIZE
);
4470 if (rc
== H_RESOURCE
)
4471 /* maybe kexecing and resource is busy. try a reset */
4472 retrc
= rc
= ibmvfc_reset_crq(vhost
);
4475 dev_warn(dev
, "Partner adapter not ready\n");
4477 dev_warn(dev
, "Error %d opening adapter\n", rc
);
4478 goto reg_crq_failed
;
4483 tasklet_init(&vhost
->tasklet
, (void *)ibmvfc_tasklet
, (unsigned long)vhost
);
4485 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
4486 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
4487 goto req_irq_failed
;
4490 if ((rc
= vio_enable_interrupts(vdev
))) {
4491 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
4492 goto req_irq_failed
;
4500 tasklet_kill(&vhost
->tasklet
);
4502 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
4503 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
4505 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4507 free_page((unsigned long)crq
->msgs
);
4512 * ibmvfc_free_mem - Free memory for vhost
4513 * @vhost: ibmvfc host struct
4518 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
4520 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4523 mempool_destroy(vhost
->tgt_pool
);
4524 kfree(vhost
->trace
);
4525 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4526 vhost
->disc_buf_dma
);
4527 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
4528 vhost
->login_buf
, vhost
->login_buf_dma
);
4529 dma_pool_destroy(vhost
->sg_pool
);
4530 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
4531 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4532 free_page((unsigned long)async_q
->msgs
);
4537 * ibmvfc_alloc_mem - Allocate memory for vhost
4538 * @vhost: ibmvfc host struct
4541 * 0 on success / non-zero on failure
4543 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
4545 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4546 struct device
*dev
= vhost
->dev
;
4549 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
4550 if (!async_q
->msgs
) {
4551 dev_err(dev
, "Couldn't allocate async queue.\n");
4555 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
4556 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
4557 async_q
->size
* sizeof(*async_q
->msgs
),
4560 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
4561 dev_err(dev
, "Failed to map async queue\n");
4562 goto free_async_crq
;
4565 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
4566 SG_ALL
* sizeof(struct srp_direct_buf
),
4567 sizeof(struct srp_direct_buf
), 0);
4569 if (!vhost
->sg_pool
) {
4570 dev_err(dev
, "Failed to allocate sg pool\n");
4571 goto unmap_async_crq
;
4574 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
4575 &vhost
->login_buf_dma
, GFP_KERNEL
);
4577 if (!vhost
->login_buf
) {
4578 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
4582 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
4583 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
4584 &vhost
->disc_buf_dma
, GFP_KERNEL
);
4586 if (!vhost
->disc_buf
) {
4587 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
4588 goto free_login_buffer
;
4591 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
4592 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
4595 goto free_disc_buffer
;
4597 vhost
->tgt_pool
= mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
4598 sizeof(struct ibmvfc_target
));
4600 if (!vhost
->tgt_pool
) {
4601 dev_err(dev
, "Couldn't allocate target memory pool\n");
4609 kfree(vhost
->trace
);
4611 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4612 vhost
->disc_buf_dma
);
4614 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
4615 vhost
->login_buf
, vhost
->login_buf_dma
);
4617 dma_pool_destroy(vhost
->sg_pool
);
4619 dma_unmap_single(dev
, async_q
->msg_token
,
4620 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4622 free_page((unsigned long)async_q
->msgs
);
4629 * ibmvfc_rport_add_thread - Worker thread for rport adds
4630 * @work: work struct
4633 static void ibmvfc_rport_add_thread(struct work_struct
*work
)
4635 struct ibmvfc_host
*vhost
= container_of(work
, struct ibmvfc_host
,
4637 struct ibmvfc_target
*tgt
;
4638 struct fc_rport
*rport
;
4639 unsigned long flags
;
4643 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4646 if (vhost
->state
!= IBMVFC_ACTIVE
)
4649 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4650 if (tgt
->add_rport
) {
4653 kref_get(&tgt
->kref
);
4656 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4657 ibmvfc_tgt_add_rport(tgt
);
4658 } else if (get_device(&rport
->dev
)) {
4659 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4660 tgt_dbg(tgt
, "Setting rport roles\n");
4661 fc_remote_port_rolechg(rport
, tgt
->ids
.roles
);
4662 put_device(&rport
->dev
);
4665 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4666 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4672 if (vhost
->state
== IBMVFC_ACTIVE
)
4673 vhost
->scan_complete
= 1;
4674 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4679 * ibmvfc_probe - Adapter hot plug add entry point
4680 * @vdev: vio device struct
4681 * @id: vio device id struct
4684 * 0 on success / non-zero on failure
4686 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
4688 struct ibmvfc_host
*vhost
;
4689 struct Scsi_Host
*shost
;
4690 struct device
*dev
= &vdev
->dev
;
4694 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
4696 dev_err(dev
, "Couldn't allocate host data\n");
4700 shost
->transportt
= ibmvfc_transport_template
;
4701 shost
->can_queue
= max_requests
;
4702 shost
->max_lun
= max_lun
;
4703 shost
->max_id
= max_targets
;
4704 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
4705 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
4706 shost
->unique_id
= shost
->host_no
;
4708 vhost
= shost_priv(shost
);
4709 INIT_LIST_HEAD(&vhost
->sent
);
4710 INIT_LIST_HEAD(&vhost
->free
);
4711 INIT_LIST_HEAD(&vhost
->targets
);
4712 sprintf(vhost
->name
, IBMVFC_NAME
);
4713 vhost
->host
= shost
;
4715 vhost
->partition_number
= -1;
4716 vhost
->log_level
= log_level
;
4717 vhost
->task_set
= 1;
4718 strcpy(vhost
->partition_name
, "UNKNOWN");
4719 init_waitqueue_head(&vhost
->work_wait_q
);
4720 init_waitqueue_head(&vhost
->init_wait_q
);
4721 INIT_WORK(&vhost
->rport_add_work_q
, ibmvfc_rport_add_thread
);
4722 mutex_init(&vhost
->passthru_mutex
);
4724 if ((rc
= ibmvfc_alloc_mem(vhost
)))
4725 goto free_scsi_host
;
4727 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
4730 if (IS_ERR(vhost
->work_thread
)) {
4731 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
4732 PTR_ERR(vhost
->work_thread
));
4736 if ((rc
= ibmvfc_init_crq(vhost
))) {
4737 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
4741 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
4742 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
4746 if ((rc
= scsi_add_host(shost
, dev
)))
4747 goto release_event_pool
;
4749 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
4750 &ibmvfc_trace_attr
))) {
4751 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
4755 if (shost_to_fc_host(shost
)->rqst_q
)
4756 blk_queue_max_segments(shost_to_fc_host(shost
)->rqst_q
, 1);
4757 dev_set_drvdata(dev
, vhost
);
4758 spin_lock(&ibmvfc_driver_lock
);
4759 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4760 spin_unlock(&ibmvfc_driver_lock
);
4762 ibmvfc_send_crq_init(vhost
);
4763 scsi_scan_host(shost
);
4767 scsi_remove_host(shost
);
4769 ibmvfc_free_event_pool(vhost
);
4771 ibmvfc_release_crq_queue(vhost
);
4773 kthread_stop(vhost
->work_thread
);
4775 ibmvfc_free_mem(vhost
);
4777 scsi_host_put(shost
);
4784 * ibmvfc_remove - Adapter hot plug remove entry point
4785 * @vdev: vio device struct
4790 static int ibmvfc_remove(struct vio_dev
*vdev
)
4792 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4793 unsigned long flags
;
4796 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4798 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4799 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4800 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4802 ibmvfc_wait_while_resetting(vhost
);
4803 ibmvfc_release_crq_queue(vhost
);
4804 kthread_stop(vhost
->work_thread
);
4805 fc_remove_host(vhost
->host
);
4806 scsi_remove_host(vhost
->host
);
4808 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4809 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4810 ibmvfc_free_event_pool(vhost
);
4811 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4813 ibmvfc_free_mem(vhost
);
4814 spin_lock(&ibmvfc_driver_lock
);
4815 list_del(&vhost
->queue
);
4816 spin_unlock(&ibmvfc_driver_lock
);
4817 scsi_host_put(vhost
->host
);
4823 * ibmvfc_resume - Resume from suspend
4824 * @dev: device struct
4826 * We may have lost an interrupt across suspend/resume, so kick the
4830 static int ibmvfc_resume(struct device
*dev
)
4832 unsigned long flags
;
4833 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
4834 struct vio_dev
*vdev
= to_vio_dev(dev
);
4836 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4837 vio_disable_interrupts(vdev
);
4838 tasklet_schedule(&vhost
->tasklet
);
4839 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4844 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4845 * @vdev: vio device struct
4848 * Number of bytes the driver will need to DMA map at the same time in
4849 * order to perform well.
4851 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4853 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4854 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4857 static struct vio_device_id ibmvfc_device_table
[] __devinitdata
= {
4858 {"fcp", "IBM,vfc-client"},
4861 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4863 static struct dev_pm_ops ibmvfc_pm_ops
= {
4864 .resume
= ibmvfc_resume
4867 static struct vio_driver ibmvfc_driver
= {
4868 .id_table
= ibmvfc_device_table
,
4869 .probe
= ibmvfc_probe
,
4870 .remove
= ibmvfc_remove
,
4871 .get_desired_dma
= ibmvfc_get_desired_dma
,
4873 .name
= IBMVFC_NAME
,
4874 .owner
= THIS_MODULE
,
4875 .pm
= &ibmvfc_pm_ops
,
4879 static struct fc_function_template ibmvfc_transport_functions
= {
4880 .show_host_fabric_name
= 1,
4881 .show_host_node_name
= 1,
4882 .show_host_port_name
= 1,
4883 .show_host_supported_classes
= 1,
4884 .show_host_port_type
= 1,
4885 .show_host_port_id
= 1,
4886 .show_host_maxframe_size
= 1,
4888 .get_host_port_state
= ibmvfc_get_host_port_state
,
4889 .show_host_port_state
= 1,
4891 .get_host_speed
= ibmvfc_get_host_speed
,
4892 .show_host_speed
= 1,
4894 .get_host_def_dev_loss_tmo
= ibmvfc_set_host_def_dev_loss_tmo
,
4896 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4897 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4899 .show_rport_maxframe_size
= 1,
4900 .show_rport_supported_classes
= 1,
4902 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4903 .show_rport_dev_loss_tmo
= 1,
4905 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4906 .show_starget_node_name
= 1,
4908 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4909 .show_starget_port_name
= 1,
4911 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4912 .show_starget_port_id
= 1,
4914 .bsg_request
= ibmvfc_bsg_request
,
4915 .bsg_timeout
= ibmvfc_bsg_timeout
,
4919 * ibmvfc_module_init - Initialize the ibmvfc module
4922 * 0 on success / other on failure
4924 static int __init
ibmvfc_module_init(void)
4928 if (!firmware_has_feature(FW_FEATURE_VIO
))
4931 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
4932 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
4934 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
4935 if (!ibmvfc_transport_template
)
4938 rc
= vio_register_driver(&ibmvfc_driver
);
4940 fc_release_transport(ibmvfc_transport_template
);
4945 * ibmvfc_module_exit - Teardown the ibmvfc module
4950 static void __exit
ibmvfc_module_exit(void)
4952 vio_unregister_driver(&ibmvfc_driver
);
4953 fc_release_transport(ibmvfc_transport_template
);
4956 module_init(ibmvfc_module_init
);
4957 module_exit(ibmvfc_module_exit
);