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>
32 #include <linux/stringify.h>
33 #include <asm/firmware.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_device.h>
40 #include <scsi/scsi_tcq.h>
41 #include <scsi/scsi_transport_fc.h>
44 static unsigned int init_timeout
= IBMVFC_INIT_TIMEOUT
;
45 static unsigned int default_timeout
= IBMVFC_DEFAULT_TIMEOUT
;
46 static unsigned int max_lun
= IBMVFC_MAX_LUN
;
47 static unsigned int max_targets
= IBMVFC_MAX_TARGETS
;
48 static unsigned int max_requests
= IBMVFC_MAX_REQUESTS_DEFAULT
;
49 static unsigned int disc_threads
= IBMVFC_MAX_DISC_THREADS
;
50 static unsigned int dev_loss_tmo
= IBMVFC_DEV_LOSS_TMO
;
51 static unsigned int ibmvfc_debug
= IBMVFC_DEBUG
;
52 static unsigned int log_level
= IBMVFC_DEFAULT_LOG_LEVEL
;
53 static LIST_HEAD(ibmvfc_head
);
54 static DEFINE_SPINLOCK(ibmvfc_driver_lock
);
55 static struct scsi_transport_template
*ibmvfc_transport_template
;
57 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(IBMVFC_DRIVER_VERSION
);
62 module_param_named(init_timeout
, init_timeout
, uint
, S_IRUGO
| S_IWUSR
);
63 MODULE_PARM_DESC(init_timeout
, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT
) "]");
65 module_param_named(default_timeout
, default_timeout
, uint
, S_IRUGO
| S_IWUSR
);
66 MODULE_PARM_DESC(default_timeout
,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT
) "]");
69 module_param_named(max_requests
, max_requests
, uint
, S_IRUGO
);
70 MODULE_PARM_DESC(max_requests
, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT
) "]");
72 module_param_named(max_lun
, max_lun
, uint
, S_IRUGO
);
73 MODULE_PARM_DESC(max_lun
, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN
) "]");
75 module_param_named(max_targets
, max_targets
, uint
, S_IRUGO
);
76 MODULE_PARM_DESC(max_targets
, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS
) "]");
78 module_param_named(disc_threads
, disc_threads
, uint
, S_IRUGO
| S_IWUSR
);
79 MODULE_PARM_DESC(disc_threads
, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS
) "]");
81 module_param_named(debug
, ibmvfc_debug
, uint
, S_IRUGO
| S_IWUSR
);
82 MODULE_PARM_DESC(debug
, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG
) "]");
84 module_param_named(dev_loss_tmo
, dev_loss_tmo
, uint
, S_IRUGO
| S_IWUSR
);
85 MODULE_PARM_DESC(dev_loss_tmo
, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO
) "]");
89 module_param_named(log_level
, log_level
, uint
, 0);
90 MODULE_PARM_DESC(log_level
, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL
) "]");
101 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_ESTABLISH
, DID_ERROR
, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_FAULT
, DID_OK
, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CMD_TIMEOUT
, DID_TIME_OUT
, 1, 1, "command timeout" },
104 { IBMVFC_FABRIC_MAPPED
, IBMVFC_ENETDOWN
, DID_NO_CONNECT
, 1, 1, "network down" },
105 { IBMVFC_FABRIC_MAPPED
, IBMVFC_HW_FAILURE
, DID_ERROR
, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DOWN_ERR
, DID_REQUEUE
, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DEAD_ERR
, DID_ERROR
, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_REGISTER
, DID_ERROR
, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_BUSY
, DID_BUS_BUSY
, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_DEAD
, DID_ERROR
, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CONFIG_ERROR
, DID_ERROR
, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED
, IBMVFC_NAME_SERVER_FAIL
, DID_ERROR
, 1, 1, "name server failure" },
113 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_HALTED
, DID_REQUEUE
, 0, 0, "link halted" },
114 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_GENERAL
, DID_OK
, 1, 0, "general transport error" },
116 { IBMVFC_VIOS_FAILURE
, IBMVFC_CRQ_FAILURE
, DID_REQUEUE
, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE
, IBMVFC_SW_FAILURE
, DID_ERROR
, 0, 1, "software failure" },
118 { IBMVFC_VIOS_FAILURE
, IBMVFC_INVALID_PARAMETER
, DID_ABORT
, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE
, IBMVFC_MISSING_PARAMETER
, DID_ABORT
, 0, 1, "missing parameter" },
120 { IBMVFC_VIOS_FAILURE
, IBMVFC_HOST_IO_BUS
, DID_ERROR
, 1, 1, "host I/O bus failure" },
121 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED
, DID_ABORT
, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED_IMPLICIT
, DID_ABORT
, 0, 1, "transaction cancelled implicit" },
123 { IBMVFC_VIOS_FAILURE
, IBMVFC_INSUFFICIENT_RESOURCE
, DID_REQUEUE
, 1, 1, "insufficient resources" },
124 { IBMVFC_VIOS_FAILURE
, IBMVFC_COMMAND_FAILED
, DID_ERROR
, 1, 1, "command failed" },
126 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_ELS_CMD_CODE
, DID_ERROR
, 0, 1, "invalid ELS command code" },
127 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_VERSION
, DID_ERROR
, 0, 1, "invalid version level" },
128 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_ERROR
, DID_ERROR
, 1, 1, "logical error" },
129 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_CT_IU_SIZE
, DID_ERROR
, 0, 1, "invalid CT_IU size" },
130 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_BUSY
, DID_REQUEUE
, 1, 0, "logical busy" },
131 { IBMVFC_FC_FAILURE
, IBMVFC_PROTOCOL_ERROR
, DID_ERROR
, 1, 1, "protocol error" },
132 { IBMVFC_FC_FAILURE
, IBMVFC_UNABLE_TO_PERFORM_REQ
, DID_ERROR
, 1, 1, "unable to perform request" },
133 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_NOT_SUPPORTED
, DID_ERROR
, 0, 0, "command not supported" },
134 { IBMVFC_FC_FAILURE
, IBMVFC_SERVER_NOT_AVAIL
, DID_ERROR
, 0, 1, "server not available" },
135 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_IN_PROGRESS
, DID_ERROR
, 0, 1, "command already in progress" },
136 { IBMVFC_FC_FAILURE
, IBMVFC_VENDOR_SPECIFIC
, DID_ERROR
, 1, 1, "vendor specific" },
138 { IBMVFC_FC_SCSI_ERROR
, 0, DID_OK
, 1, 0, "SCSI error" },
141 static void ibmvfc_npiv_login(struct ibmvfc_host
*);
142 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*);
143 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*);
144 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*);
146 static const char *unknown_error
= "unknown error";
148 #ifdef CONFIG_SCSI_IBMVFC_TRACE
150 * ibmvfc_trc_start - Log a start trace entry
151 * @evt: ibmvfc event struct
154 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
156 struct ibmvfc_host
*vhost
= evt
->vhost
;
157 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
158 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
159 struct ibmvfc_trace_entry
*entry
;
161 entry
= &vhost
->trace
[vhost
->trace_index
++];
163 entry
->time
= jiffies
;
164 entry
->fmt
= evt
->crq
.format
;
165 entry
->type
= IBMVFC_TRC_START
;
167 switch (entry
->fmt
) {
168 case IBMVFC_CMD_FORMAT
:
169 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
170 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
171 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
172 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
173 entry
->u
.start
.xfer_len
= vfc_cmd
->iu
.xfer_len
;
175 case IBMVFC_MAD_FORMAT
:
176 entry
->op_code
= mad
->opcode
;
184 * ibmvfc_trc_end - Log an end trace entry
185 * @evt: ibmvfc event struct
188 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
190 struct ibmvfc_host
*vhost
= evt
->vhost
;
191 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
192 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
193 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
196 entry
->time
= jiffies
;
197 entry
->fmt
= evt
->crq
.format
;
198 entry
->type
= IBMVFC_TRC_END
;
200 switch (entry
->fmt
) {
201 case IBMVFC_CMD_FORMAT
:
202 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
203 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
204 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
205 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
206 entry
->u
.end
.status
= vfc_cmd
->status
;
207 entry
->u
.end
.error
= vfc_cmd
->error
;
208 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
209 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
210 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
212 case IBMVFC_MAD_FORMAT
:
213 entry
->op_code
= mad
->opcode
;
214 entry
->u
.end
.status
= mad
->status
;
223 #define ibmvfc_trc_start(evt) do { } while (0)
224 #define ibmvfc_trc_end(evt) do { } while (0)
228 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
229 * @status: status / error class
233 * index into cmd_status / -EINVAL on failure
235 static int ibmvfc_get_err_index(u16 status
, u16 error
)
239 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
240 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
241 cmd_status
[i
].error
== error
)
248 * ibmvfc_get_cmd_error - Find the error description for the fcp response
249 * @status: status / error class
253 * error description string
255 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
257 int rc
= ibmvfc_get_err_index(status
, error
);
259 return cmd_status
[rc
].name
;
260 return unknown_error
;
264 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
265 * @vfc_cmd: ibmvfc command struct
268 * SCSI result value to return for completed command
270 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
273 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
274 int fc_rsp_len
= rsp
->fcp_rsp_len
;
276 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
277 ((!fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
278 rsp
->data
.info
.rsp_code
))
279 return DID_ERROR
<< 16;
281 err
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
283 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
284 return rsp
->scsi_status
| (DID_ERROR
<< 16);
288 * ibmvfc_retry_cmd - Determine if error status is retryable
289 * @status: status / error class
293 * 1 if error should be retried / 0 if it should not
295 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
297 int rc
= ibmvfc_get_err_index(status
, error
);
300 return cmd_status
[rc
].retry
;
304 static const char *unknown_fc_explain
= "unknown fc explain";
306 static const struct {
310 { 0x00, "no additional explanation" },
311 { 0x01, "service parameter error - options" },
312 { 0x03, "service parameter error - initiator control" },
313 { 0x05, "service parameter error - recipient control" },
314 { 0x07, "service parameter error - received data field size" },
315 { 0x09, "service parameter error - concurrent seq" },
316 { 0x0B, "service parameter error - credit" },
317 { 0x0D, "invalid N_Port/F_Port_Name" },
318 { 0x0E, "invalid node/Fabric Name" },
319 { 0x0F, "invalid common service parameters" },
320 { 0x11, "invalid association header" },
321 { 0x13, "association header required" },
322 { 0x15, "invalid originator S_ID" },
323 { 0x17, "invalid OX_ID-RX-ID combination" },
324 { 0x19, "command (request) already in progress" },
325 { 0x1E, "N_Port Login requested" },
326 { 0x1F, "Invalid N_Port_ID" },
329 static const struct {
333 { 0x00, "no additional explanation" },
334 { 0x01, "port identifier not registered" },
335 { 0x02, "port name not registered" },
336 { 0x03, "node name not registered" },
337 { 0x04, "class of service not registered" },
338 { 0x06, "initial process associator not registered" },
339 { 0x07, "FC-4 TYPEs not registered" },
340 { 0x08, "symbolic port name not registered" },
341 { 0x09, "symbolic node name not registered" },
342 { 0x0A, "port type not registered" },
343 { 0xF0, "authorization exception" },
344 { 0xF1, "authentication exception" },
345 { 0xF2, "data base full" },
346 { 0xF3, "data base empty" },
347 { 0xF4, "processing request" },
348 { 0xF5, "unable to verify connection" },
349 { 0xF6, "devices not in a common zone" },
353 * ibmvfc_get_ls_explain - Return the FC Explain description text
354 * @status: FC Explain status
359 static const char *ibmvfc_get_ls_explain(u16 status
)
363 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
364 if (ls_explain
[i
].fc_explain
== status
)
365 return ls_explain
[i
].name
;
367 return unknown_fc_explain
;
371 * ibmvfc_get_gs_explain - Return the FC Explain description text
372 * @status: FC Explain status
377 static const char *ibmvfc_get_gs_explain(u16 status
)
381 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
382 if (gs_explain
[i
].fc_explain
== status
)
383 return gs_explain
[i
].name
;
385 return unknown_fc_explain
;
388 static const struct {
389 enum ibmvfc_fc_type fc_type
;
392 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
393 { IBMVFC_PORT_REJECT
, "port reject" },
394 { IBMVFC_LS_REJECT
, "ELS reject" },
395 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
396 { IBMVFC_PORT_BUSY
, "port busy" },
397 { IBMVFC_BASIC_REJECT
, "basic reject" },
400 static const char *unknown_fc_type
= "unknown fc type";
403 * ibmvfc_get_fc_type - Return the FC Type description text
404 * @status: FC Type error status
409 static const char *ibmvfc_get_fc_type(u16 status
)
413 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
414 if (fc_type
[i
].fc_type
== status
)
415 return fc_type
[i
].name
;
417 return unknown_fc_type
;
421 * ibmvfc_set_tgt_action - Set the next init action for the target
422 * @tgt: ibmvfc target struct
423 * @action: action to perform
426 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
427 enum ibmvfc_target_action action
)
429 switch (tgt
->action
) {
430 case IBMVFC_TGT_ACTION_DEL_RPORT
:
433 tgt
->action
= action
;
439 * ibmvfc_set_host_state - Set the state for the host
440 * @vhost: ibmvfc host struct
441 * @state: state to set host to
444 * 0 if state changed / non-zero if not changed
446 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
447 enum ibmvfc_host_state state
)
451 switch (vhost
->state
) {
452 case IBMVFC_HOST_OFFLINE
:
456 vhost
->state
= state
;
464 * ibmvfc_set_host_action - Set the next init action for the host
465 * @vhost: ibmvfc host struct
466 * @action: action to perform
469 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
470 enum ibmvfc_host_action action
)
473 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
474 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
475 vhost
->action
= action
;
477 case IBMVFC_HOST_ACTION_INIT_WAIT
:
478 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
479 vhost
->action
= action
;
481 case IBMVFC_HOST_ACTION_QUERY
:
482 switch (vhost
->action
) {
483 case IBMVFC_HOST_ACTION_INIT_WAIT
:
484 case IBMVFC_HOST_ACTION_NONE
:
485 case IBMVFC_HOST_ACTION_TGT_ADD
:
486 vhost
->action
= action
;
492 case IBMVFC_HOST_ACTION_TGT_INIT
:
493 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
494 vhost
->action
= action
;
496 case IBMVFC_HOST_ACTION_INIT
:
497 case IBMVFC_HOST_ACTION_TGT_DEL
:
498 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
499 case IBMVFC_HOST_ACTION_TGT_ADD
:
500 case IBMVFC_HOST_ACTION_NONE
:
502 vhost
->action
= action
;
508 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
509 * @vhost: ibmvfc host struct
514 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
516 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
517 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
518 scsi_block_requests(vhost
->host
);
519 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
524 wake_up(&vhost
->work_wait_q
);
528 * ibmvfc_link_down - Handle a link down event from the adapter
529 * @vhost: ibmvfc host struct
530 * @state: ibmvfc host state to enter
533 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
534 enum ibmvfc_host_state state
)
536 struct ibmvfc_target
*tgt
;
539 scsi_block_requests(vhost
->host
);
540 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
541 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
542 ibmvfc_set_host_state(vhost
, state
);
543 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
544 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
545 wake_up(&vhost
->work_wait_q
);
550 * ibmvfc_init_host - Start host initialization
551 * @vhost: ibmvfc host struct
552 * @relogin: is this a re-login?
557 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
, int relogin
)
559 struct ibmvfc_target
*tgt
;
561 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
562 if (++vhost
->init_retries
> IBMVFC_MAX_INIT_RETRIES
) {
564 "Host initialization retries exceeded. Taking adapter offline\n");
565 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
570 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
572 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
573 vhost
->async_crq
.cur
= 0;
576 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
578 scsi_block_requests(vhost
->host
);
579 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
580 vhost
->job_step
= ibmvfc_npiv_login
;
581 wake_up(&vhost
->work_wait_q
);
586 * ibmvfc_send_crq - Send a CRQ
587 * @vhost: ibmvfc host struct
588 * @word1: the first 64 bits of the data
589 * @word2: the second 64 bits of the data
592 * 0 on success / other on failure
594 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
596 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
597 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
601 * ibmvfc_send_crq_init - Send a CRQ init message
602 * @vhost: ibmvfc host struct
605 * 0 on success / other on failure
607 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
609 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
610 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
614 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
615 * @vhost: ibmvfc host struct
618 * 0 on success / other on failure
620 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
622 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
623 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
627 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
628 * @vhost: ibmvfc host struct
630 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
631 * the crq with the hypervisor.
633 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
636 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
637 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
639 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
640 free_irq(vdev
->irq
, vhost
);
642 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
643 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
645 vhost
->state
= IBMVFC_NO_CRQ
;
646 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
647 free_page((unsigned long)crq
->msgs
);
651 * ibmvfc_reenable_crq_queue - reenables the CRQ
652 * @vhost: ibmvfc host struct
655 * 0 on success / other on failure
657 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
660 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
662 /* Re-enable the CRQ */
664 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
665 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
668 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
674 * ibmvfc_reset_crq - resets a crq after a failure
675 * @vhost: ibmvfc host struct
678 * 0 on success / other on failure
680 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
683 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
684 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
688 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
689 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
691 vhost
->state
= IBMVFC_NO_CRQ
;
692 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
694 /* Clean out the queue */
695 memset(crq
->msgs
, 0, PAGE_SIZE
);
698 /* And re-open it again */
699 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
700 crq
->msg_token
, PAGE_SIZE
);
703 /* Adapter is good, but other end is not ready */
704 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
706 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
712 * ibmvfc_valid_event - Determines if event is valid.
713 * @pool: event_pool that contains the event
714 * @evt: ibmvfc event to be checked for validity
717 * 1 if event is valid / 0 if event is not valid
719 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
720 struct ibmvfc_event
*evt
)
722 int index
= evt
- pool
->events
;
723 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
725 if (evt
!= pool
->events
+ index
) /* unaligned */
731 * ibmvfc_free_event - Free the specified event
732 * @evt: ibmvfc_event to be freed
735 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
737 struct ibmvfc_host
*vhost
= evt
->vhost
;
738 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
740 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
741 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
742 list_add_tail(&evt
->queue
, &vhost
->free
);
746 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
747 * @evt: ibmvfc event struct
749 * This function does not setup any error status, that must be done
750 * before this function gets called.
752 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
754 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
757 scsi_dma_unmap(cmnd
);
758 cmnd
->scsi_done(cmnd
);
762 complete(evt
->eh_comp
);
764 ibmvfc_free_event(evt
);
768 * ibmvfc_fail_request - Fail request with specified error code
769 * @evt: ibmvfc event struct
770 * @error_code: error code to fail request with
775 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
778 evt
->cmnd
->result
= (error_code
<< 16);
779 evt
->done
= ibmvfc_scsi_eh_done
;
781 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_DRIVER_FAILED
;
783 list_del(&evt
->queue
);
784 del_timer(&evt
->timer
);
790 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
791 * @vhost: ibmvfc host struct
792 * @error_code: error code to fail requests with
797 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
799 struct ibmvfc_event
*evt
, *pos
;
801 ibmvfc_dbg(vhost
, "Purging all requests\n");
802 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
803 ibmvfc_fail_request(evt
, error_code
);
807 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
808 * @vhost: struct ibmvfc host to reset
810 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
814 scsi_block_requests(vhost
->host
);
815 ibmvfc_purge_requests(vhost
, DID_ERROR
);
816 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
817 (rc
= ibmvfc_send_crq_init(vhost
)) ||
818 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
819 dev_err(vhost
->dev
, "Error after reset rc=%d\n", rc
);
820 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
822 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
826 * ibmvfc_reset_host - Reset the connection to the server
827 * @vhost: struct ibmvfc host to reset
829 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
833 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
834 __ibmvfc_reset_host(vhost
);
835 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
839 * ibmvfc_retry_host_init - Retry host initialization if allowed
840 * @vhost: ibmvfc host struct
843 static void ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
845 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
846 if (++vhost
->init_retries
> IBMVFC_MAX_INIT_RETRIES
) {
848 "Host initialization retries exceeded. Taking adapter offline\n");
849 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
850 } else if (vhost
->init_retries
== IBMVFC_MAX_INIT_RETRIES
)
851 __ibmvfc_reset_host(vhost
);
853 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
856 wake_up(&vhost
->work_wait_q
);
860 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
861 * @starget: scsi target struct
864 * ibmvfc_target struct / NULL if not found
866 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
868 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
869 struct ibmvfc_host
*vhost
= shost_priv(shost
);
870 struct ibmvfc_target
*tgt
;
872 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
873 if (tgt
->target_id
== starget
->id
) {
874 kref_get(&tgt
->kref
);
881 * ibmvfc_get_target - Find the specified scsi_target
882 * @starget: scsi target struct
885 * ibmvfc_target struct / NULL if not found
887 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
889 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
890 struct ibmvfc_target
*tgt
;
893 spin_lock_irqsave(shost
->host_lock
, flags
);
894 tgt
= __ibmvfc_get_target(starget
);
895 spin_unlock_irqrestore(shost
->host_lock
, flags
);
900 * ibmvfc_get_host_speed - Get host port speed
901 * @shost: scsi host struct
906 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
908 struct ibmvfc_host
*vhost
= shost_priv(shost
);
911 spin_lock_irqsave(shost
->host_lock
, flags
);
912 if (vhost
->state
== IBMVFC_ACTIVE
) {
913 switch (vhost
->login_buf
->resp
.link_speed
/ 100) {
915 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
918 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
921 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
924 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
927 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
930 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
933 ibmvfc_log(vhost
, 3, "Unknown port speed: %ld Gbit\n",
934 vhost
->login_buf
->resp
.link_speed
/ 100);
935 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
939 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
940 spin_unlock_irqrestore(shost
->host_lock
, flags
);
944 * ibmvfc_get_host_port_state - Get host port state
945 * @shost: scsi host struct
950 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
952 struct ibmvfc_host
*vhost
= shost_priv(shost
);
955 spin_lock_irqsave(shost
->host_lock
, flags
);
956 switch (vhost
->state
) {
957 case IBMVFC_INITIALIZING
:
959 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
961 case IBMVFC_LINK_DOWN
:
962 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
964 case IBMVFC_LINK_DEAD
:
965 case IBMVFC_HOST_OFFLINE
:
966 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
969 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
972 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
975 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
976 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
979 spin_unlock_irqrestore(shost
->host_lock
, flags
);
983 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
984 * @rport: rport struct
985 * @timeout: timeout value
990 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
993 rport
->dev_loss_tmo
= timeout
;
995 rport
->dev_loss_tmo
= 1;
999 * ibmvfc_release_tgt - Free memory allocated for a target
1000 * @kref: kref struct
1003 static void ibmvfc_release_tgt(struct kref
*kref
)
1005 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1010 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1011 * @starget: scsi target struct
1016 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1018 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1019 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1021 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1025 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1026 * @starget: scsi target struct
1031 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1033 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1034 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1036 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1040 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1041 * @starget: scsi target struct
1046 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1048 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1049 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1051 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1055 * ibmvfc_wait_while_resetting - Wait while the host resets
1056 * @vhost: ibmvfc host struct
1059 * 0 on success / other on failure
1061 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1063 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1064 ((vhost
->state
== IBMVFC_ACTIVE
||
1065 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1066 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1067 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1068 (init_timeout
* HZ
));
1070 return timeout
? 0 : -EIO
;
1074 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1075 * @shost: scsi host struct
1078 * 0 on success / other on failure
1080 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1082 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1084 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1085 ibmvfc_reset_host(vhost
);
1086 return ibmvfc_wait_while_resetting(vhost
);
1090 * ibmvfc_gather_partition_info - Gather info about the LPAR
1095 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1097 struct device_node
*rootdn
;
1099 const unsigned int *num
;
1101 rootdn
= of_find_node_by_path("/");
1105 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1107 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1108 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1110 vhost
->partition_number
= *num
;
1111 of_node_put(rootdn
);
1115 * ibmvfc_set_login_info - Setup info for NPIV login
1116 * @vhost: ibmvfc host struct
1121 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1123 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1124 struct device_node
*of_node
= vhost
->dev
->archdata
.of_node
;
1125 const char *location
;
1127 memset(login_info
, 0, sizeof(*login_info
));
1129 login_info
->ostype
= IBMVFC_OS_LINUX
;
1130 login_info
->max_dma_len
= IBMVFC_MAX_SECTORS
<< 9;
1131 login_info
->max_payload
= sizeof(struct ibmvfc_fcp_cmd_iu
);
1132 login_info
->max_response
= sizeof(struct ibmvfc_fcp_rsp
);
1133 login_info
->partition_num
= vhost
->partition_number
;
1134 login_info
->vfc_frame_version
= 1;
1135 login_info
->fcp_version
= 3;
1136 if (vhost
->client_migrated
)
1137 login_info
->flags
= IBMVFC_CLIENT_MIGRATED
;
1139 login_info
->max_cmds
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1140 login_info
->capabilities
= IBMVFC_CAN_MIGRATE
;
1141 login_info
->async
.va
= vhost
->async_crq
.msg_token
;
1142 login_info
->async
.len
= vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
);
1143 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1144 strncpy(login_info
->device_name
,
1145 vhost
->host
->shost_gendev
.bus_id
, IBMVFC_MAX_NAME
);
1147 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1148 location
= location
? location
: vhost
->dev
->bus_id
;
1149 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1153 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1154 * @vhost: ibmvfc host who owns the event pool
1156 * Returns zero on success.
1158 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1161 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1164 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1165 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1169 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1170 pool
->size
* sizeof(*pool
->iu_storage
),
1171 &pool
->iu_token
, 0);
1173 if (!pool
->iu_storage
) {
1174 kfree(pool
->events
);
1178 for (i
= 0; i
< pool
->size
; ++i
) {
1179 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1180 atomic_set(&evt
->free
, 1);
1181 evt
->crq
.valid
= 0x80;
1182 evt
->crq
.ioba
= pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
);
1183 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1185 evt
->ext_list
= NULL
;
1186 list_add_tail(&evt
->queue
, &vhost
->free
);
1194 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1195 * @vhost: ibmvfc host who owns the event pool
1198 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1201 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1204 for (i
= 0; i
< pool
->size
; ++i
) {
1205 list_del(&pool
->events
[i
].queue
);
1206 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1207 if (pool
->events
[i
].ext_list
)
1208 dma_pool_free(vhost
->sg_pool
,
1209 pool
->events
[i
].ext_list
,
1210 pool
->events
[i
].ext_list_token
);
1213 kfree(pool
->events
);
1214 dma_free_coherent(vhost
->dev
,
1215 pool
->size
* sizeof(*pool
->iu_storage
),
1216 pool
->iu_storage
, pool
->iu_token
);
1221 * ibmvfc_get_event - Gets the next free event in pool
1222 * @vhost: ibmvfc host struct
1224 * Returns a free event from the pool.
1226 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1228 struct ibmvfc_event
*evt
;
1230 BUG_ON(list_empty(&vhost
->free
));
1231 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1232 atomic_set(&evt
->free
, 0);
1233 list_del(&evt
->queue
);
1238 * ibmvfc_init_event - Initialize fields in an event struct that are always
1241 * @done: Routine to call when the event is responded to
1242 * @format: SRP or MAD format
1244 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1245 void (*done
) (struct ibmvfc_event
*), u8 format
)
1248 evt
->sync_iu
= NULL
;
1249 evt
->crq
.format
= format
;
1251 evt
->eh_comp
= NULL
;
1255 * ibmvfc_map_sg_list - Initialize scatterlist
1256 * @scmd: scsi command struct
1257 * @nseg: number of scatterlist segments
1258 * @md: memory descriptor list to initialize
1260 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1261 struct srp_direct_buf
*md
)
1264 struct scatterlist
*sg
;
1266 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1267 md
[i
].va
= sg_dma_address(sg
);
1268 md
[i
].len
= sg_dma_len(sg
);
1274 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1275 * @scmd: Scsi_Cmnd with the scatterlist
1276 * @evt: ibmvfc event struct
1277 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1278 * @dev: device for which to map dma memory
1281 * 0 on success / non-zero on failure
1283 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1284 struct ibmvfc_event
*evt
,
1285 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1289 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1290 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1292 sg_mapped
= scsi_dma_map(scmd
);
1294 vfc_cmd
->flags
|= IBMVFC_NO_MEM_DESC
;
1296 } else if (unlikely(sg_mapped
< 0)) {
1297 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1298 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1302 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1303 vfc_cmd
->flags
|= IBMVFC_WRITE
;
1304 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1306 vfc_cmd
->flags
|= IBMVFC_READ
;
1307 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1310 if (sg_mapped
== 1) {
1311 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1315 vfc_cmd
->flags
|= IBMVFC_SCATTERLIST
;
1317 if (!evt
->ext_list
) {
1318 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1319 &evt
->ext_list_token
);
1321 if (!evt
->ext_list
) {
1322 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1327 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1329 data
->va
= evt
->ext_list_token
;
1330 data
->len
= sg_mapped
* sizeof(struct srp_direct_buf
);
1336 * ibmvfc_timeout - Internal command timeout handler
1337 * @evt: struct ibmvfc_event that timed out
1339 * Called when an internally generated command times out
1341 static void ibmvfc_timeout(struct ibmvfc_event
*evt
)
1343 struct ibmvfc_host
*vhost
= evt
->vhost
;
1344 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1345 ibmvfc_reset_host(vhost
);
1349 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1350 * @evt: event to be sent
1351 * @vhost: ibmvfc host struct
1352 * @timeout: timeout in seconds - 0 means do not time command
1354 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1356 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1357 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1359 u64
*crq_as_u64
= (u64
*) &evt
->crq
;
1362 /* Copy the IU into the transfer area */
1363 *evt
->xfer_iu
= evt
->iu
;
1364 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1365 evt
->xfer_iu
->cmd
.tag
= (u64
)evt
;
1366 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1367 evt
->xfer_iu
->mad_common
.tag
= (u64
)evt
;
1371 list_add_tail(&evt
->queue
, &vhost
->sent
);
1372 init_timer(&evt
->timer
);
1375 evt
->timer
.data
= (unsigned long) evt
;
1376 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1377 evt
->timer
.function
= (void (*)(unsigned long))ibmvfc_timeout
;
1378 add_timer(&evt
->timer
);
1381 if ((rc
= ibmvfc_send_crq(vhost
, crq_as_u64
[0], crq_as_u64
[1]))) {
1382 list_del(&evt
->queue
);
1383 del_timer(&evt
->timer
);
1385 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1386 * Firmware will send a CRQ with a transport event (0xFF) to
1387 * tell this client what has happened to the transport. This
1388 * will be handled in ibmvfc_handle_crq()
1390 if (rc
== H_CLOSED
) {
1391 if (printk_ratelimit())
1392 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1394 scsi_dma_unmap(evt
->cmnd
);
1395 ibmvfc_free_event(evt
);
1396 return SCSI_MLQUEUE_HOST_BUSY
;
1399 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1401 evt
->cmnd
->result
= DID_ERROR
<< 16;
1402 evt
->done
= ibmvfc_scsi_eh_done
;
1404 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_CRQ_ERROR
;
1408 ibmvfc_trc_start(evt
);
1414 * ibmvfc_log_error - Log an error for the failed command if appropriate
1415 * @evt: ibmvfc event to log
1418 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1420 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1421 struct ibmvfc_host
*vhost
= evt
->vhost
;
1422 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1423 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1424 const char *err
= unknown_error
;
1425 int index
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
1430 logerr
= cmd_status
[index
].log
;
1431 err
= cmd_status
[index
].name
;
1434 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1437 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1438 rsp_code
= rsp
->data
.info
.rsp_code
;
1440 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1441 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1442 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1443 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1447 * ibmvfc_scsi_done - Handle responses from commands
1448 * @evt: ibmvfc event to be handled
1450 * Used as a callback when sending scsi cmds.
1452 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1454 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1455 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1456 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1458 u32 sense_len
= rsp
->fcp_sense_len
;
1461 if (vfc_cmd
->response_flags
& IBMVFC_ADAPTER_RESID_VALID
)
1462 scsi_set_resid(cmnd
, vfc_cmd
->adapter_resid
);
1463 else if (rsp
->flags
& FCP_RESID_UNDER
)
1464 scsi_set_resid(cmnd
, rsp
->fcp_resid
);
1466 scsi_set_resid(cmnd
, 0);
1468 if (vfc_cmd
->status
) {
1469 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1471 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1472 rsp_len
= rsp
->fcp_rsp_len
;
1473 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1474 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1475 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1476 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1478 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1479 cmnd
->result
= (DID_ERROR
<< 16);
1481 ibmvfc_log_error(evt
);
1484 if (!cmnd
->result
&&
1485 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1486 cmnd
->result
= (DID_ERROR
<< 16);
1488 scsi_dma_unmap(cmnd
);
1489 cmnd
->scsi_done(cmnd
);
1493 complete(evt
->eh_comp
);
1495 ibmvfc_free_event(evt
);
1499 * ibmvfc_host_chkready - Check if the host can accept commands
1500 * @vhost: struct ibmvfc host
1503 * 1 if host can accept command / 0 if not
1505 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1509 switch (vhost
->state
) {
1510 case IBMVFC_LINK_DEAD
:
1511 case IBMVFC_HOST_OFFLINE
:
1512 result
= DID_NO_CONNECT
<< 16;
1515 case IBMVFC_INITIALIZING
:
1517 case IBMVFC_LINK_DOWN
:
1518 result
= DID_REQUEUE
<< 16;
1529 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1530 * @cmnd: struct scsi_cmnd to be executed
1531 * @done: Callback function to be called when cmnd is completed
1534 * 0 on success / other on failure
1536 static int ibmvfc_queuecommand(struct scsi_cmnd
*cmnd
,
1537 void (*done
) (struct scsi_cmnd
*))
1539 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1540 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1541 struct ibmvfc_cmd
*vfc_cmd
;
1542 struct ibmvfc_event
*evt
;
1546 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1547 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1553 cmnd
->result
= (DID_OK
<< 16);
1554 evt
= ibmvfc_get_event(vhost
);
1555 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1557 cmnd
->scsi_done
= done
;
1558 vfc_cmd
= &evt
->iu
.cmd
;
1559 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1560 vfc_cmd
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1561 vfc_cmd
->resp
.len
= sizeof(vfc_cmd
->rsp
);
1562 vfc_cmd
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1563 vfc_cmd
->payload_len
= sizeof(vfc_cmd
->iu
);
1564 vfc_cmd
->resp_len
= sizeof(vfc_cmd
->rsp
);
1565 vfc_cmd
->cancel_key
= (unsigned long)cmnd
->device
->hostdata
;
1566 vfc_cmd
->tgt_scsi_id
= rport
->port_id
;
1567 if ((rport
->supported_classes
& FC_COS_CLASS3
) &&
1568 (fc_host_supported_classes(vhost
->host
) & FC_COS_CLASS3
))
1569 vfc_cmd
->flags
= IBMVFC_CLASS_3_ERR
;
1570 vfc_cmd
->iu
.xfer_len
= scsi_bufflen(cmnd
);
1571 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1572 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1574 if (scsi_populate_tag_msg(cmnd
, tag
)) {
1575 vfc_cmd
->task_tag
= tag
[1];
1577 case MSG_SIMPLE_TAG
:
1578 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1581 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_HEAD_OF_QUEUE
;
1583 case MSG_ORDERED_TAG
:
1584 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_ORDERED_TASK
;
1589 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1590 return ibmvfc_send_event(evt
, vhost
, 0);
1592 ibmvfc_free_event(evt
);
1594 return SCSI_MLQUEUE_HOST_BUSY
;
1596 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1597 scmd_printk(KERN_ERR
, cmnd
,
1598 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1600 cmnd
->result
= DID_ERROR
<< 16;
1606 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1607 * @evt: ibmvfc event struct
1610 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1612 /* copy the response back */
1614 *evt
->sync_iu
= *evt
->xfer_iu
;
1616 complete(&evt
->comp
);
1620 * ibmvfc_reset_device - Reset the device with the specified reset type
1621 * @sdev: scsi device to reset
1623 * @desc: reset type description for log messages
1626 * 0 on success / other on failure
1628 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1630 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1631 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1632 struct ibmvfc_cmd
*tmf
;
1633 struct ibmvfc_event
*evt
;
1634 union ibmvfc_iu rsp_iu
;
1635 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1636 int rsp_rc
= -EBUSY
;
1637 unsigned long flags
;
1640 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1641 if (vhost
->state
== IBMVFC_ACTIVE
) {
1642 evt
= ibmvfc_get_event(vhost
);
1643 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1646 memset(tmf
, 0, sizeof(*tmf
));
1647 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1648 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1649 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1650 tmf
->payload_len
= sizeof(tmf
->iu
);
1651 tmf
->resp_len
= sizeof(tmf
->rsp
);
1652 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1653 tmf
->tgt_scsi_id
= rport
->port_id
;
1654 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1655 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1656 tmf
->iu
.tmf_flags
= type
;
1657 evt
->sync_iu
= &rsp_iu
;
1659 init_completion(&evt
->comp
);
1660 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1662 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1665 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
1670 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
1671 wait_for_completion(&evt
->comp
);
1673 if (rsp_iu
.cmd
.status
) {
1674 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
1675 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
1677 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
1678 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1679 desc
, ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
1680 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
1681 fc_rsp
->scsi_status
);
1684 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
1686 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1687 ibmvfc_free_event(evt
);
1688 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1693 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1694 * @sdev: scsi device to abort commands
1696 * This sends an Abort Task Set to the VIOS for the specified device. This does
1697 * NOT send any cancel to the VIOS. That must be done separately.
1700 * 0 on success / other on failure
1702 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
1704 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1705 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1706 struct ibmvfc_cmd
*tmf
;
1707 struct ibmvfc_event
*evt
, *found_evt
;
1708 union ibmvfc_iu rsp_iu
;
1709 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1710 int rsp_rc
= -EBUSY
;
1711 unsigned long flags
;
1714 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1716 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1717 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
1724 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1725 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
1726 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1730 if (vhost
->state
== IBMVFC_ACTIVE
) {
1731 evt
= ibmvfc_get_event(vhost
);
1732 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1735 memset(tmf
, 0, sizeof(*tmf
));
1736 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1737 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1738 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1739 tmf
->payload_len
= sizeof(tmf
->iu
);
1740 tmf
->resp_len
= sizeof(tmf
->rsp
);
1741 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1742 tmf
->tgt_scsi_id
= rport
->port_id
;
1743 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1744 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1745 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
1746 evt
->sync_iu
= &rsp_iu
;
1748 init_completion(&evt
->comp
);
1749 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1752 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1755 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
1759 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
1760 wait_for_completion(&evt
->comp
);
1762 if (rsp_iu
.cmd
.status
) {
1763 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
1764 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
1766 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
1767 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1768 ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
1769 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
1770 fc_rsp
->scsi_status
);
1773 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
1775 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1776 ibmvfc_free_event(evt
);
1777 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1782 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1783 * @sdev: scsi device to cancel commands
1784 * @type: type of error recovery being performed
1786 * This sends a cancel to the VIOS for the specified device. This does
1787 * NOT send any abort to the actual device. That must be done separately.
1790 * 0 on success / other on failure
1792 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
1794 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1795 struct scsi_target
*starget
= scsi_target(sdev
);
1796 struct fc_rport
*rport
= starget_to_rport(starget
);
1797 struct ibmvfc_tmf
*tmf
;
1798 struct ibmvfc_event
*evt
, *found_evt
;
1799 union ibmvfc_iu rsp
;
1800 int rsp_rc
= -EBUSY
;
1801 unsigned long flags
;
1805 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1807 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1808 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
1815 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1816 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
1817 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1821 if (vhost
->state
== IBMVFC_ACTIVE
) {
1822 evt
= ibmvfc_get_event(vhost
);
1823 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1826 memset(tmf
, 0, sizeof(*tmf
));
1827 tmf
->common
.version
= 1;
1828 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
1829 tmf
->common
.length
= sizeof(*tmf
);
1830 tmf
->scsi_id
= rport
->port_id
;
1831 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
1832 tmf
->flags
= (type
| IBMVFC_TMF_LUA_VALID
);
1833 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1834 tmf
->my_cancel_key
= (unsigned long)starget
->hostdata
;
1836 evt
->sync_iu
= &rsp
;
1837 init_completion(&evt
->comp
);
1838 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1841 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1844 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
1848 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
1850 wait_for_completion(&evt
->comp
);
1851 status
= rsp
.mad_common
.status
;
1852 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1853 ibmvfc_free_event(evt
);
1854 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1856 if (status
!= IBMVFC_MAD_SUCCESS
) {
1857 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
1861 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
1866 * ibmvfc_match_target - Match function for specified target
1867 * @evt: ibmvfc event struct
1868 * @device: device to match (starget)
1871 * 1 if event matches starget / 0 if event does not match starget
1873 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
1875 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
1881 * ibmvfc_match_lun - Match function for specified LUN
1882 * @evt: ibmvfc event struct
1883 * @device: device to match (sdev)
1886 * 1 if event matches sdev / 0 if event does not match sdev
1888 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
1890 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
1896 * ibmvfc_wait_for_ops - Wait for ops to complete
1897 * @vhost: ibmvfc host struct
1898 * @device: device to match (starget or sdev)
1899 * @match: match function
1904 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
1905 int (*match
) (struct ibmvfc_event
*, void *))
1907 struct ibmvfc_event
*evt
;
1908 DECLARE_COMPLETION_ONSTACK(comp
);
1910 unsigned long flags
;
1911 signed long timeout
= init_timeout
* HZ
;
1916 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1917 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1918 if (match(evt
, device
)) {
1919 evt
->eh_comp
= &comp
;
1923 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1926 timeout
= wait_for_completion_timeout(&comp
, timeout
);
1930 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1931 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1932 if (match(evt
, device
)) {
1933 evt
->eh_comp
= NULL
;
1937 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1939 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
1941 return wait
? FAILED
: SUCCESS
;
1951 * ibmvfc_eh_abort_handler - Abort a command
1952 * @cmd: scsi command to abort
1957 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
1959 struct scsi_device
*sdev
= cmd
->device
;
1960 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1961 int cancel_rc
, abort_rc
;
1965 ibmvfc_wait_while_resetting(vhost
);
1966 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
1967 abort_rc
= ibmvfc_abort_task_set(sdev
);
1969 if (!cancel_rc
&& !abort_rc
)
1970 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
1977 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1978 * @cmd: scsi command struct
1983 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
1985 struct scsi_device
*sdev
= cmd
->device
;
1986 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1987 int cancel_rc
, reset_rc
;
1991 ibmvfc_wait_while_resetting(vhost
);
1992 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
1993 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
1995 if (!cancel_rc
&& !reset_rc
)
1996 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2003 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2004 * @sdev: scsi device struct
2005 * @data: return code
2008 static void ibmvfc_dev_cancel_all(struct scsi_device
*sdev
, void *data
)
2010 unsigned long *rc
= data
;
2011 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2015 * ibmvfc_dev_abort_all - Device iterated abort task set function
2016 * @sdev: scsi device struct
2017 * @data: return code
2020 static void ibmvfc_dev_abort_all(struct scsi_device
*sdev
, void *data
)
2022 unsigned long *rc
= data
;
2023 *rc
|= ibmvfc_abort_task_set(sdev
);
2027 * ibmvfc_eh_target_reset_handler - Reset the target
2028 * @cmd: scsi command struct
2033 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2035 struct scsi_device
*sdev
= cmd
->device
;
2036 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2037 struct scsi_target
*starget
= scsi_target(sdev
);
2040 unsigned long cancel_rc
= 0;
2043 ibmvfc_wait_while_resetting(vhost
);
2044 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all
);
2045 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2047 if (!cancel_rc
&& !reset_rc
)
2048 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2055 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2056 * @cmd: struct scsi_cmnd having problems
2059 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2062 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2064 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2065 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2066 return rc
? FAILED
: SUCCESS
;
2070 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2071 * @rport: rport struct
2076 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2078 struct scsi_target
*starget
= to_scsi_target(&rport
->dev
);
2079 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2080 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2081 unsigned long cancel_rc
= 0;
2082 unsigned long abort_rc
= 0;
2086 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all
);
2087 starget_for_each_device(starget
, &abort_rc
, ibmvfc_dev_abort_all
);
2089 if (!cancel_rc
&& !abort_rc
)
2090 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2093 ibmvfc_issue_fc_host_lip(shost
);
2097 static const struct {
2098 enum ibmvfc_async_event ae
;
2101 { IBMVFC_AE_ELS_PLOGI
, "PLOGI" },
2102 { IBMVFC_AE_ELS_LOGO
, "LOGO" },
2103 { IBMVFC_AE_ELS_PRLO
, "PRLO" },
2104 { IBMVFC_AE_SCN_NPORT
, "N-Port SCN" },
2105 { IBMVFC_AE_SCN_GROUP
, "Group SCN" },
2106 { IBMVFC_AE_SCN_DOMAIN
, "Domain SCN" },
2107 { IBMVFC_AE_SCN_FABRIC
, "Fabric SCN" },
2108 { IBMVFC_AE_LINK_UP
, "Link Up" },
2109 { IBMVFC_AE_LINK_DOWN
, "Link Down" },
2110 { IBMVFC_AE_LINK_DEAD
, "Link Dead" },
2111 { IBMVFC_AE_HALT
, "Halt" },
2112 { IBMVFC_AE_RESUME
, "Resume" },
2113 { IBMVFC_AE_ADAPTER_FAILED
, "Adapter Failed" },
2116 static const char *unknown_ae
= "Unknown async";
2119 * ibmvfc_get_ae_desc - Get text description for async event
2123 static const char *ibmvfc_get_ae_desc(u64 ae
)
2127 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2128 if (ae_desc
[i
].ae
== ae
)
2129 return ae_desc
[i
].desc
;
2135 * ibmvfc_handle_async - Handle an async event from the adapter
2136 * @crq: crq to process
2137 * @vhost: ibmvfc host struct
2140 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2141 struct ibmvfc_host
*vhost
)
2143 const char *desc
= ibmvfc_get_ae_desc(crq
->event
);
2145 ibmvfc_log(vhost
, 3, "%s event received. scsi_id: %lx, wwpn: %lx,"
2146 " node_name: %lx\n", desc
, crq
->scsi_id
, crq
->wwpn
, crq
->node_name
);
2148 switch (crq
->event
) {
2149 case IBMVFC_AE_LINK_UP
:
2150 case IBMVFC_AE_RESUME
:
2151 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2152 ibmvfc_init_host(vhost
, 1);
2154 case IBMVFC_AE_SCN_FABRIC
:
2155 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2156 ibmvfc_init_host(vhost
, 1);
2158 case IBMVFC_AE_SCN_NPORT
:
2159 case IBMVFC_AE_SCN_GROUP
:
2160 case IBMVFC_AE_SCN_DOMAIN
:
2161 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2162 case IBMVFC_AE_ELS_LOGO
:
2163 case IBMVFC_AE_ELS_PRLO
:
2164 case IBMVFC_AE_ELS_PLOGI
:
2165 ibmvfc_reinit_host(vhost
);
2167 case IBMVFC_AE_LINK_DOWN
:
2168 case IBMVFC_AE_ADAPTER_FAILED
:
2169 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2171 case IBMVFC_AE_LINK_DEAD
:
2172 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2174 case IBMVFC_AE_HALT
:
2175 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2178 dev_err(vhost
->dev
, "Unknown async event received: %ld\n", crq
->event
);
2184 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2185 * @crq: Command/Response queue
2186 * @vhost: ibmvfc host struct
2189 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2192 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)crq
->ioba
;
2194 switch (crq
->valid
) {
2195 case IBMVFC_CRQ_INIT_RSP
:
2196 switch (crq
->format
) {
2197 case IBMVFC_CRQ_INIT
:
2198 dev_info(vhost
->dev
, "Partner initialized\n");
2199 /* Send back a response */
2200 rc
= ibmvfc_send_crq_init_complete(vhost
);
2202 ibmvfc_init_host(vhost
, 0);
2204 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2206 case IBMVFC_CRQ_INIT_COMPLETE
:
2207 dev_info(vhost
->dev
, "Partner initialization complete\n");
2208 ibmvfc_init_host(vhost
, 0);
2211 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2214 case IBMVFC_CRQ_XPORT_EVENT
:
2215 vhost
->state
= IBMVFC_NO_CRQ
;
2216 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2217 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2218 /* We need to re-setup the interpartition connection */
2219 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2220 vhost
->client_migrated
= 1;
2221 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2222 if ((rc
= ibmvfc_reenable_crq_queue(vhost
)) ||
2223 (rc
= ibmvfc_send_crq_init(vhost
))) {
2224 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2225 dev_err(vhost
->dev
, "Error after enable (rc=%ld)\n", rc
);
2227 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2229 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2231 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2232 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
2233 (rc
= ibmvfc_send_crq_init(vhost
))) {
2234 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2235 dev_err(vhost
->dev
, "Error after reset (rc=%ld)\n", rc
);
2237 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2240 case IBMVFC_CRQ_CMD_RSP
:
2243 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2247 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2250 /* The only kind of payload CRQs we should get are responses to
2251 * things we send. Make sure this response is to something we
2254 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2255 dev_err(vhost
->dev
, "Returned correlation_token 0x%08lx is invalid!\n",
2260 if (unlikely(atomic_read(&evt
->free
))) {
2261 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08lx!\n",
2266 del_timer(&evt
->timer
);
2267 list_del(&evt
->queue
);
2268 ibmvfc_trc_end(evt
);
2273 * ibmvfc_scan_finished - Check if the device scan is done.
2274 * @shost: scsi host struct
2275 * @time: current elapsed time
2278 * 0 if scan is not done / 1 if scan is done
2280 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2282 unsigned long flags
;
2283 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2286 spin_lock_irqsave(shost
->host_lock
, flags
);
2287 if (time
>= (init_timeout
* HZ
)) {
2288 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2289 "continuing initialization\n", init_timeout
);
2293 if (vhost
->state
!= IBMVFC_NO_CRQ
&& vhost
->action
== IBMVFC_HOST_ACTION_NONE
)
2295 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2300 * ibmvfc_slave_alloc - Setup the device's task set value
2301 * @sdev: struct scsi_device device to configure
2303 * Set the device's task set value so that error handling works as
2307 * 0 on success / -ENXIO if device does not exist
2309 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2311 struct Scsi_Host
*shost
= sdev
->host
;
2312 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2313 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2314 unsigned long flags
= 0;
2316 if (!rport
|| fc_remote_port_chkready(rport
))
2319 spin_lock_irqsave(shost
->host_lock
, flags
);
2320 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2321 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2326 * ibmvfc_target_alloc - Setup the target's task set value
2327 * @starget: struct scsi_target
2329 * Set the target's task set value so that error handling works as
2333 * 0 on success / -ENXIO if device does not exist
2335 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2337 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2338 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2339 unsigned long flags
= 0;
2341 spin_lock_irqsave(shost
->host_lock
, flags
);
2342 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2343 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2348 * ibmvfc_slave_configure - Configure the device
2349 * @sdev: struct scsi_device device to configure
2351 * Enable allow_restart for a device if it is a disk. Adjust the
2352 * queue_depth here also.
2357 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2359 struct Scsi_Host
*shost
= sdev
->host
;
2360 struct fc_rport
*rport
= starget_to_rport(sdev
->sdev_target
);
2361 unsigned long flags
= 0;
2363 spin_lock_irqsave(shost
->host_lock
, flags
);
2364 if (sdev
->type
== TYPE_DISK
)
2365 sdev
->allow_restart
= 1;
2367 if (sdev
->tagged_supported
) {
2368 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
2369 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2371 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2373 rport
->dev_loss_tmo
= dev_loss_tmo
;
2374 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2379 * ibmvfc_change_queue_depth - Change the device's queue depth
2380 * @sdev: scsi device struct
2381 * @qdepth: depth to set
2386 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
)
2388 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2389 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2391 scsi_adjust_queue_depth(sdev
, 0, qdepth
);
2392 return sdev
->queue_depth
;
2396 * ibmvfc_change_queue_type - Change the device's queue type
2397 * @sdev: scsi device struct
2398 * @tag_type: type of tags to use
2401 * actual queue type set
2403 static int ibmvfc_change_queue_type(struct scsi_device
*sdev
, int tag_type
)
2405 if (sdev
->tagged_supported
) {
2406 scsi_set_tag_type(sdev
, tag_type
);
2409 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2411 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2418 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2419 struct device_attribute
*attr
, char *buf
)
2421 struct Scsi_Host
*shost
= class_to_shost(dev
);
2422 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2424 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2425 vhost
->login_buf
->resp
.partition_name
);
2428 static struct device_attribute ibmvfc_host_partition_name
= {
2430 .name
= "partition_name",
2433 .show
= ibmvfc_show_host_partition_name
,
2436 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2437 struct device_attribute
*attr
, char *buf
)
2439 struct Scsi_Host
*shost
= class_to_shost(dev
);
2440 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2442 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2443 vhost
->login_buf
->resp
.device_name
);
2446 static struct device_attribute ibmvfc_host_device_name
= {
2448 .name
= "device_name",
2451 .show
= ibmvfc_show_host_device_name
,
2454 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2455 struct device_attribute
*attr
, char *buf
)
2457 struct Scsi_Host
*shost
= class_to_shost(dev
);
2458 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2460 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2461 vhost
->login_buf
->resp
.port_loc_code
);
2464 static struct device_attribute ibmvfc_host_loc_code
= {
2466 .name
= "port_loc_code",
2469 .show
= ibmvfc_show_host_loc_code
,
2472 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2473 struct device_attribute
*attr
, char *buf
)
2475 struct Scsi_Host
*shost
= class_to_shost(dev
);
2476 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2478 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2479 vhost
->login_buf
->resp
.drc_name
);
2482 static struct device_attribute ibmvfc_host_drc_name
= {
2487 .show
= ibmvfc_show_host_drc_name
,
2490 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2491 struct device_attribute
*attr
, char *buf
)
2493 struct Scsi_Host
*shost
= class_to_shost(dev
);
2494 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2495 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2498 static struct device_attribute ibmvfc_host_npiv_version
= {
2500 .name
= "npiv_version",
2503 .show
= ibmvfc_show_host_npiv_version
,
2507 * ibmvfc_show_log_level - Show the adapter's error logging level
2508 * @dev: class device struct
2512 * number of bytes printed to buffer
2514 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2515 struct device_attribute
*attr
, char *buf
)
2517 struct Scsi_Host
*shost
= class_to_shost(dev
);
2518 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2519 unsigned long flags
= 0;
2522 spin_lock_irqsave(shost
->host_lock
, flags
);
2523 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2524 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2529 * ibmvfc_store_log_level - Change the adapter's error logging level
2530 * @dev: class device struct
2534 * number of bytes printed to buffer
2536 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
2537 struct device_attribute
*attr
,
2538 const char *buf
, size_t count
)
2540 struct Scsi_Host
*shost
= class_to_shost(dev
);
2541 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2542 unsigned long flags
= 0;
2544 spin_lock_irqsave(shost
->host_lock
, flags
);
2545 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
2546 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2550 static struct device_attribute ibmvfc_log_level_attr
= {
2552 .name
= "log_level",
2553 .mode
= S_IRUGO
| S_IWUSR
,
2555 .show
= ibmvfc_show_log_level
,
2556 .store
= ibmvfc_store_log_level
2559 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2561 * ibmvfc_read_trace - Dump the adapter trace
2562 * @kobj: kobject struct
2563 * @bin_attr: bin_attribute struct
2566 * @count: buffer size
2569 * number of bytes printed to buffer
2571 static ssize_t
ibmvfc_read_trace(struct kobject
*kobj
,
2572 struct bin_attribute
*bin_attr
,
2573 char *buf
, loff_t off
, size_t count
)
2575 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
2576 struct Scsi_Host
*shost
= class_to_shost(dev
);
2577 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2578 unsigned long flags
= 0;
2579 int size
= IBMVFC_TRACE_SIZE
;
2580 char *src
= (char *)vhost
->trace
;
2584 if (off
+ count
> size
) {
2589 spin_lock_irqsave(shost
->host_lock
, flags
);
2590 memcpy(buf
, &src
[off
], count
);
2591 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2595 static struct bin_attribute ibmvfc_trace_attr
= {
2601 .read
= ibmvfc_read_trace
,
2605 static struct device_attribute
*ibmvfc_attrs
[] = {
2606 &ibmvfc_host_partition_name
,
2607 &ibmvfc_host_device_name
,
2608 &ibmvfc_host_loc_code
,
2609 &ibmvfc_host_drc_name
,
2610 &ibmvfc_host_npiv_version
,
2611 &ibmvfc_log_level_attr
,
2615 static struct scsi_host_template driver_template
= {
2616 .module
= THIS_MODULE
,
2617 .name
= "IBM POWER Virtual FC Adapter",
2618 .proc_name
= IBMVFC_NAME
,
2619 .queuecommand
= ibmvfc_queuecommand
,
2620 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
2621 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
2622 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
2623 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
2624 .slave_alloc
= ibmvfc_slave_alloc
,
2625 .slave_configure
= ibmvfc_slave_configure
,
2626 .target_alloc
= ibmvfc_target_alloc
,
2627 .scan_finished
= ibmvfc_scan_finished
,
2628 .change_queue_depth
= ibmvfc_change_queue_depth
,
2629 .change_queue_type
= ibmvfc_change_queue_type
,
2631 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
2633 .sg_tablesize
= SG_ALL
,
2634 .max_sectors
= IBMVFC_MAX_SECTORS
,
2635 .use_clustering
= ENABLE_CLUSTERING
,
2636 .shost_attrs
= ibmvfc_attrs
,
2640 * ibmvfc_next_async_crq - Returns the next entry in async queue
2641 * @vhost: ibmvfc host struct
2644 * Pointer to next entry in queue / NULL if empty
2646 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
2648 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
2649 struct ibmvfc_async_crq
*crq
;
2651 crq
= &async_crq
->msgs
[async_crq
->cur
];
2652 if (crq
->valid
& 0x80) {
2653 if (++async_crq
->cur
== async_crq
->size
)
2662 * ibmvfc_next_crq - Returns the next entry in message queue
2663 * @vhost: ibmvfc host struct
2666 * Pointer to next entry in queue / NULL if empty
2668 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
2670 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
2671 struct ibmvfc_crq
*crq
;
2673 crq
= &queue
->msgs
[queue
->cur
];
2674 if (crq
->valid
& 0x80) {
2675 if (++queue
->cur
== queue
->size
)
2684 * ibmvfc_interrupt - Interrupt handler
2685 * @irq: number of irq to handle, not used
2686 * @dev_instance: ibmvfc_host that received interrupt
2691 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
2693 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
2694 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
2695 struct ibmvfc_crq
*crq
;
2696 struct ibmvfc_async_crq
*async
;
2697 unsigned long flags
;
2700 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2701 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
2703 /* Pull all the valid messages off the CRQ */
2704 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
2705 ibmvfc_handle_crq(crq
, vhost
);
2709 /* Pull all the valid messages off the async CRQ */
2710 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
2711 ibmvfc_handle_async(async
, vhost
);
2715 vio_enable_interrupts(vdev
);
2716 if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
2717 vio_disable_interrupts(vdev
);
2718 ibmvfc_handle_crq(crq
, vhost
);
2720 } else if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
2721 vio_disable_interrupts(vdev
);
2722 ibmvfc_handle_async(async
, vhost
);
2728 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2733 * ibmvfc_init_tgt - Set the next init job step for the target
2734 * @tgt: ibmvfc target struct
2735 * @job_step: job step to perform
2738 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
2739 void (*job_step
) (struct ibmvfc_target
*))
2741 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
2742 tgt
->job_step
= job_step
;
2743 wake_up(&tgt
->vhost
->work_wait_q
);
2747 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2748 * @tgt: ibmvfc target struct
2749 * @job_step: initialization job step
2752 static void ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
2753 void (*job_step
) (struct ibmvfc_target
*))
2755 if (++tgt
->init_retries
> IBMVFC_MAX_INIT_RETRIES
) {
2756 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2757 wake_up(&tgt
->vhost
->work_wait_q
);
2759 ibmvfc_init_tgt(tgt
, job_step
);
2763 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2764 * @evt: ibmvfc event struct
2767 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
2769 struct ibmvfc_target
*tgt
= evt
->tgt
;
2770 struct ibmvfc_host
*vhost
= evt
->vhost
;
2771 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
2772 u32 status
= rsp
->common
.status
;
2774 vhost
->discovery_threads
--;
2775 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2777 case IBMVFC_MAD_SUCCESS
:
2778 tgt_dbg(tgt
, "Process Login succeeded\n");
2779 tgt
->need_login
= 0;
2780 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_ADD_RPORT
);
2782 case IBMVFC_MAD_DRIVER_FAILED
:
2784 case IBMVFC_MAD_CRQ_ERROR
:
2785 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2787 case IBMVFC_MAD_FAILED
:
2789 tgt_err(tgt
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2790 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
),
2791 rsp
->status
, rsp
->error
, status
);
2792 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
2793 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2797 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2798 ibmvfc_free_event(evt
);
2799 wake_up(&vhost
->work_wait_q
);
2803 * ibmvfc_tgt_send_prli - Send a process login
2804 * @tgt: ibmvfc target struct
2807 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
2809 struct ibmvfc_process_login
*prli
;
2810 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2811 struct ibmvfc_event
*evt
;
2813 if (vhost
->discovery_threads
>= disc_threads
)
2816 kref_get(&tgt
->kref
);
2817 evt
= ibmvfc_get_event(vhost
);
2818 vhost
->discovery_threads
++;
2819 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
2821 prli
= &evt
->iu
.prli
;
2822 memset(prli
, 0, sizeof(*prli
));
2823 prli
->common
.version
= 1;
2824 prli
->common
.opcode
= IBMVFC_PROCESS_LOGIN
;
2825 prli
->common
.length
= sizeof(*prli
);
2826 prli
->scsi_id
= tgt
->scsi_id
;
2828 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
2829 prli
->parms
.flags
= IBMVFC_PRLI_EST_IMG_PAIR
;
2830 prli
->parms
.service_parms
= IBMVFC_PRLI_INITIATOR_FUNC
;
2832 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
2833 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
2834 vhost
->discovery_threads
--;
2835 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2836 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2838 tgt_dbg(tgt
, "Sent process login\n");
2842 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2843 * @evt: ibmvfc event struct
2846 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
2848 struct ibmvfc_target
*tgt
= evt
->tgt
;
2849 struct ibmvfc_host
*vhost
= evt
->vhost
;
2850 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
2851 u32 status
= rsp
->common
.status
;
2853 vhost
->discovery_threads
--;
2854 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2856 case IBMVFC_MAD_SUCCESS
:
2857 tgt_dbg(tgt
, "Port Login succeeded\n");
2858 if (tgt
->ids
.port_name
&&
2859 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
2861 tgt_dbg(tgt
, "Port re-init required\n");
2864 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
2865 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
2866 tgt
->ids
.port_id
= tgt
->scsi_id
;
2867 tgt
->ids
.roles
= FC_PORT_ROLE_FCP_TARGET
;
2868 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
2869 sizeof(tgt
->service_parms
));
2870 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
2871 sizeof(tgt
->service_parms_change
));
2872 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
2874 case IBMVFC_MAD_DRIVER_FAILED
:
2876 case IBMVFC_MAD_CRQ_ERROR
:
2877 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
2879 case IBMVFC_MAD_FAILED
:
2881 tgt_err(tgt
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2882 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
2883 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
2884 ibmvfc_get_ls_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
2886 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
2887 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
2891 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2892 ibmvfc_free_event(evt
);
2893 wake_up(&vhost
->work_wait_q
);
2897 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
2898 * @tgt: ibmvfc target struct
2901 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
2903 struct ibmvfc_port_login
*plogi
;
2904 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2905 struct ibmvfc_event
*evt
;
2907 if (vhost
->discovery_threads
>= disc_threads
)
2910 kref_get(&tgt
->kref
);
2911 evt
= ibmvfc_get_event(vhost
);
2912 vhost
->discovery_threads
++;
2913 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
2914 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
2916 plogi
= &evt
->iu
.plogi
;
2917 memset(plogi
, 0, sizeof(*plogi
));
2918 plogi
->common
.version
= 1;
2919 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
2920 plogi
->common
.length
= sizeof(*plogi
);
2921 plogi
->scsi_id
= tgt
->scsi_id
;
2923 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
2924 vhost
->discovery_threads
--;
2925 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2926 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2928 tgt_dbg(tgt
, "Sent port login\n");
2932 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
2933 * @evt: ibmvfc event struct
2936 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
2938 struct ibmvfc_target
*tgt
= evt
->tgt
;
2939 struct ibmvfc_host
*vhost
= evt
->vhost
;
2940 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
2941 u32 status
= rsp
->common
.status
;
2943 vhost
->discovery_threads
--;
2944 ibmvfc_free_event(evt
);
2945 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2948 case IBMVFC_MAD_SUCCESS
:
2949 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
2951 case IBMVFC_MAD_DRIVER_FAILED
:
2952 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2953 wake_up(&vhost
->work_wait_q
);
2955 case IBMVFC_MAD_FAILED
:
2957 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
2961 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
2962 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
2963 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
2964 tgt
->scsi_id
!= tgt
->new_scsi_id
)
2965 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2966 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2967 wake_up(&vhost
->work_wait_q
);
2971 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
2972 * @tgt: ibmvfc target struct
2975 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
2977 struct ibmvfc_implicit_logout
*mad
;
2978 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2979 struct ibmvfc_event
*evt
;
2981 if (vhost
->discovery_threads
>= disc_threads
)
2984 kref_get(&tgt
->kref
);
2985 evt
= ibmvfc_get_event(vhost
);
2986 vhost
->discovery_threads
++;
2987 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
2989 mad
= &evt
->iu
.implicit_logout
;
2990 memset(mad
, 0, sizeof(*mad
));
2991 mad
->common
.version
= 1;
2992 mad
->common
.opcode
= IBMVFC_IMPLICIT_LOGOUT
;
2993 mad
->common
.length
= sizeof(*mad
);
2994 mad
->old_scsi_id
= tgt
->scsi_id
;
2996 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
2997 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
2998 vhost
->discovery_threads
--;
2999 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3000 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3002 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3006 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3007 * @mad: ibmvfc passthru mad struct
3008 * @tgt: ibmvfc target struct
3011 * 1 if PLOGI needed / 0 if PLOGI not needed
3013 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3014 struct ibmvfc_target
*tgt
)
3016 if (memcmp(&mad
->fc_iu
.response
[2], &tgt
->ids
.port_name
,
3017 sizeof(tgt
->ids
.port_name
)))
3019 if (memcmp(&mad
->fc_iu
.response
[4], &tgt
->ids
.node_name
,
3020 sizeof(tgt
->ids
.node_name
)))
3022 if (mad
->fc_iu
.response
[6] != tgt
->scsi_id
)
3028 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3029 * @evt: ibmvfc event struct
3032 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3034 struct ibmvfc_target
*tgt
= evt
->tgt
;
3035 struct ibmvfc_host
*vhost
= evt
->vhost
;
3036 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3037 u32 status
= mad
->common
.status
;
3038 u8 fc_reason
, fc_explain
;
3040 vhost
->discovery_threads
--;
3041 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3044 case IBMVFC_MAD_SUCCESS
:
3045 tgt_dbg(tgt
, "ADISC succeeded\n");
3046 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3047 tgt
->need_login
= 1;
3049 case IBMVFC_MAD_DRIVER_FAILED
:
3051 case IBMVFC_MAD_FAILED
:
3053 tgt
->need_login
= 1;
3054 fc_reason
= (mad
->fc_iu
.response
[1] & 0x00ff0000) >> 16;
3055 fc_explain
= (mad
->fc_iu
.response
[1] & 0x0000ff00) >> 8;
3056 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3057 ibmvfc_get_cmd_error(mad
->iu
.status
, mad
->iu
.error
),
3058 mad
->iu
.status
, mad
->iu
.error
,
3059 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3060 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3064 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3065 ibmvfc_free_event(evt
);
3066 wake_up(&vhost
->work_wait_q
);
3070 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3071 * @evt: ibmvfc event struct
3074 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3076 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3078 memset(mad
, 0, sizeof(*mad
));
3079 mad
->common
.version
= 1;
3080 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
3081 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
3082 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
3083 offsetof(struct ibmvfc_passthru_mad
, iu
);
3084 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
3085 mad
->iu
.cmd_len
= sizeof(mad
->fc_iu
.payload
);
3086 mad
->iu
.rsp_len
= sizeof(mad
->fc_iu
.response
);
3087 mad
->iu
.cmd
.va
= (u64
)evt
->crq
.ioba
+
3088 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3089 offsetof(struct ibmvfc_passthru_fc_iu
, payload
);
3090 mad
->iu
.cmd
.len
= sizeof(mad
->fc_iu
.payload
);
3091 mad
->iu
.rsp
.va
= (u64
)evt
->crq
.ioba
+
3092 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3093 offsetof(struct ibmvfc_passthru_fc_iu
, response
);
3094 mad
->iu
.rsp
.len
= sizeof(mad
->fc_iu
.response
);
3098 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3099 * @tgt: ibmvfc target struct
3102 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3104 struct ibmvfc_passthru_mad
*mad
;
3105 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3106 struct ibmvfc_event
*evt
;
3108 if (vhost
->discovery_threads
>= disc_threads
)
3111 kref_get(&tgt
->kref
);
3112 evt
= ibmvfc_get_event(vhost
);
3113 vhost
->discovery_threads
++;
3114 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3117 ibmvfc_init_passthru(evt
);
3118 mad
= &evt
->iu
.passthru
;
3119 mad
->iu
.flags
= IBMVFC_FC_ELS
;
3120 mad
->iu
.scsi_id
= tgt
->scsi_id
;
3122 mad
->fc_iu
.payload
[0] = IBMVFC_ADISC
;
3123 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3124 sizeof(vhost
->login_buf
->resp
.port_name
));
3125 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3126 sizeof(vhost
->login_buf
->resp
.node_name
));
3127 mad
->fc_iu
.payload
[6] = vhost
->login_buf
->resp
.scsi_id
& 0x00ffffff;
3129 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3130 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3131 vhost
->discovery_threads
--;
3132 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3133 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3135 tgt_dbg(tgt
, "Sent ADISC\n");
3139 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3140 * @evt: ibmvfc event struct
3143 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3145 struct ibmvfc_target
*tgt
= evt
->tgt
;
3146 struct ibmvfc_host
*vhost
= evt
->vhost
;
3147 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3148 u32 status
= rsp
->common
.status
;
3150 vhost
->discovery_threads
--;
3151 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3153 case IBMVFC_MAD_SUCCESS
:
3154 tgt_dbg(tgt
, "Query Target succeeded\n");
3155 tgt
->new_scsi_id
= rsp
->scsi_id
;
3156 if (rsp
->scsi_id
!= tgt
->scsi_id
)
3157 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3159 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3161 case IBMVFC_MAD_DRIVER_FAILED
:
3163 case IBMVFC_MAD_CRQ_ERROR
:
3164 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3166 case IBMVFC_MAD_FAILED
:
3168 tgt_err(tgt
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3169 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3170 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3171 ibmvfc_get_gs_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3173 if ((rsp
->status
& IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3174 rsp
->error
== IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3175 rsp
->fc_explain
== IBMVFC_PORT_NAME_NOT_REG
)
3176 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3177 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3178 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3182 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3183 ibmvfc_free_event(evt
);
3184 wake_up(&vhost
->work_wait_q
);
3188 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3189 * @tgt: ibmvfc target struct
3192 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3194 struct ibmvfc_query_tgt
*query_tgt
;
3195 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3196 struct ibmvfc_event
*evt
;
3198 if (vhost
->discovery_threads
>= disc_threads
)
3201 kref_get(&tgt
->kref
);
3202 evt
= ibmvfc_get_event(vhost
);
3203 vhost
->discovery_threads
++;
3205 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3206 query_tgt
= &evt
->iu
.query_tgt
;
3207 memset(query_tgt
, 0, sizeof(*query_tgt
));
3208 query_tgt
->common
.version
= 1;
3209 query_tgt
->common
.opcode
= IBMVFC_QUERY_TARGET
;
3210 query_tgt
->common
.length
= sizeof(*query_tgt
);
3211 query_tgt
->wwpn
= tgt
->ids
.port_name
;
3213 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3214 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3215 vhost
->discovery_threads
--;
3216 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3217 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3219 tgt_dbg(tgt
, "Sent Query Target\n");
3223 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3224 * @vhost: ibmvfc host struct
3225 * @scsi_id: SCSI ID to allocate target for
3228 * 0 on success / other on failure
3230 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3232 struct ibmvfc_target
*tgt
;
3233 unsigned long flags
;
3235 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3236 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3237 if (tgt
->scsi_id
== scsi_id
) {
3238 if (tgt
->need_login
)
3239 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3243 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3245 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_KERNEL
);
3247 dev_err(vhost
->dev
, "Target allocation failure for scsi id %08lx\n",
3252 tgt
->scsi_id
= scsi_id
;
3253 tgt
->new_scsi_id
= scsi_id
;
3255 tgt
->need_login
= 1;
3256 kref_init(&tgt
->kref
);
3257 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3258 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3259 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3262 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3267 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3268 * @vhost: ibmvfc host struct
3271 * 0 on success / other on failure
3273 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3277 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3278 rc
= ibmvfc_alloc_target(vhost
,
3279 vhost
->disc_buf
->scsi_id
[i
] & IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3285 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3286 * @evt: ibmvfc event struct
3289 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3291 struct ibmvfc_host
*vhost
= evt
->vhost
;
3292 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3293 u32 mad_status
= rsp
->common
.status
;
3295 switch (mad_status
) {
3296 case IBMVFC_MAD_SUCCESS
:
3297 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3298 vhost
->num_targets
= rsp
->num_written
;
3299 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3301 case IBMVFC_MAD_FAILED
:
3302 dev_err(vhost
->dev
, "Discover Targets failed: %s (%x:%x)\n",
3303 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3304 ibmvfc_retry_host_init(vhost
);
3306 case IBMVFC_MAD_DRIVER_FAILED
:
3309 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3310 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3314 ibmvfc_free_event(evt
);
3315 wake_up(&vhost
->work_wait_q
);
3319 * ibmvfc_discover_targets - Send Discover Targets MAD
3320 * @vhost: ibmvfc host struct
3323 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3325 struct ibmvfc_discover_targets
*mad
;
3326 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3328 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3329 mad
= &evt
->iu
.discover_targets
;
3330 memset(mad
, 0, sizeof(*mad
));
3331 mad
->common
.version
= 1;
3332 mad
->common
.opcode
= IBMVFC_DISC_TARGETS
;
3333 mad
->common
.length
= sizeof(*mad
);
3334 mad
->bufflen
= vhost
->disc_buf_sz
;
3335 mad
->buffer
.va
= vhost
->disc_buf_dma
;
3336 mad
->buffer
.len
= vhost
->disc_buf_sz
;
3337 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3339 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3340 ibmvfc_dbg(vhost
, "Sent discover targets\n");
3342 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3346 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3347 * @evt: ibmvfc event struct
3350 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
3352 struct ibmvfc_host
*vhost
= evt
->vhost
;
3353 u32 mad_status
= evt
->xfer_iu
->npiv_login
.common
.status
;
3354 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
3355 unsigned int npiv_max_sectors
;
3357 switch (mad_status
) {
3358 case IBMVFC_MAD_SUCCESS
:
3359 ibmvfc_free_event(evt
);
3361 case IBMVFC_MAD_FAILED
:
3362 dev_err(vhost
->dev
, "NPIV Login failed: %s (%x:%x)\n",
3363 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3364 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3365 ibmvfc_retry_host_init(vhost
);
3367 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3368 ibmvfc_free_event(evt
);
3370 case IBMVFC_MAD_CRQ_ERROR
:
3371 ibmvfc_retry_host_init(vhost
);
3372 case IBMVFC_MAD_DRIVER_FAILED
:
3373 ibmvfc_free_event(evt
);
3376 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
3377 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3378 ibmvfc_free_event(evt
);
3382 vhost
->client_migrated
= 0;
3384 if (!(rsp
->flags
& IBMVFC_NATIVE_FC
)) {
3385 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
3387 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3388 wake_up(&vhost
->work_wait_q
);
3392 if (rsp
->max_cmds
<= IBMVFC_NUM_INTERNAL_REQ
) {
3393 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
3395 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3396 wake_up(&vhost
->work_wait_q
);
3400 npiv_max_sectors
= min((uint
)(rsp
->max_dma_len
>> 9), IBMVFC_MAX_SECTORS
);
3401 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
3402 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
3403 rsp
->drc_name
, npiv_max_sectors
);
3405 fc_host_fabric_name(vhost
->host
) = rsp
->node_name
;
3406 fc_host_node_name(vhost
->host
) = rsp
->node_name
;
3407 fc_host_port_name(vhost
->host
) = rsp
->port_name
;
3408 fc_host_port_id(vhost
->host
) = rsp
->scsi_id
;
3409 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
3410 fc_host_supported_classes(vhost
->host
) = 0;
3411 if (rsp
->service_parms
.class1_parms
[0] & 0x80000000)
3412 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
3413 if (rsp
->service_parms
.class2_parms
[0] & 0x80000000)
3414 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
3415 if (rsp
->service_parms
.class3_parms
[0] & 0x80000000)
3416 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
3417 fc_host_maxframe_size(vhost
->host
) =
3418 rsp
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3420 vhost
->host
->can_queue
= rsp
->max_cmds
- IBMVFC_NUM_INTERNAL_REQ
;
3421 vhost
->host
->max_sectors
= npiv_max_sectors
;
3422 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3423 wake_up(&vhost
->work_wait_q
);
3427 * ibmvfc_npiv_login - Sends NPIV login
3428 * @vhost: ibmvfc host struct
3431 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
3433 struct ibmvfc_npiv_login_mad
*mad
;
3434 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3436 ibmvfc_gather_partition_info(vhost
);
3437 ibmvfc_set_login_info(vhost
);
3438 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
3440 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
3441 mad
= &evt
->iu
.npiv_login
;
3442 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
3443 mad
->common
.version
= 1;
3444 mad
->common
.opcode
= IBMVFC_NPIV_LOGIN
;
3445 mad
->common
.length
= sizeof(struct ibmvfc_npiv_login_mad
);
3446 mad
->buffer
.va
= vhost
->login_buf_dma
;
3447 mad
->buffer
.len
= sizeof(*vhost
->login_buf
);
3449 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3451 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3452 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
3454 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3458 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3459 * @vhost: ibmvfc host struct
3462 * 1 if work to do / 0 if not
3464 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
3466 struct ibmvfc_target
*tgt
;
3468 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3469 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
3470 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
3478 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3479 * @vhost: ibmvfc host struct
3482 * 1 if work to do / 0 if not
3484 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
3486 struct ibmvfc_target
*tgt
;
3488 if (kthread_should_stop())
3490 switch (vhost
->action
) {
3491 case IBMVFC_HOST_ACTION_NONE
:
3492 case IBMVFC_HOST_ACTION_INIT_WAIT
:
3494 case IBMVFC_HOST_ACTION_TGT_INIT
:
3495 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
3496 if (vhost
->discovery_threads
== disc_threads
)
3498 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3499 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
3501 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3502 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
3505 case IBMVFC_HOST_ACTION_INIT
:
3506 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
3507 case IBMVFC_HOST_ACTION_TGT_ADD
:
3508 case IBMVFC_HOST_ACTION_TGT_DEL
:
3509 case IBMVFC_HOST_ACTION_QUERY
:
3518 * ibmvfc_work_to_do - Is there task level work to do?
3519 * @vhost: ibmvfc host struct
3522 * 1 if work to do / 0 if not
3524 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
3526 unsigned long flags
;
3529 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3530 rc
= __ibmvfc_work_to_do(vhost
);
3531 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3536 * ibmvfc_log_ae - Log async events if necessary
3537 * @vhost: ibmvfc host struct
3538 * @events: events to log
3541 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
3543 if (events
& IBMVFC_AE_RSCN
)
3544 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
3545 if ((events
& IBMVFC_AE_LINKDOWN
) &&
3546 vhost
->state
>= IBMVFC_HALTED
)
3547 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
3548 if ((events
& IBMVFC_AE_LINKUP
) &&
3549 vhost
->state
== IBMVFC_INITIALIZING
)
3550 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
3554 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3555 * @tgt: ibmvfc target struct
3558 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
3560 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3561 struct fc_rport
*rport
;
3562 unsigned long flags
;
3564 tgt_dbg(tgt
, "Adding rport\n");
3565 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
3566 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3568 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3570 tgt_dbg(tgt
, "rport add succeeded\n");
3571 rport
->maxframe_size
= tgt
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3572 rport
->supported_classes
= 0;
3573 tgt
->target_id
= rport
->scsi_target_id
;
3574 if (tgt
->service_parms
.class1_parms
[0] & 0x80000000)
3575 rport
->supported_classes
|= FC_COS_CLASS1
;
3576 if (tgt
->service_parms
.class2_parms
[0] & 0x80000000)
3577 rport
->supported_classes
|= FC_COS_CLASS2
;
3578 if (tgt
->service_parms
.class3_parms
[0] & 0x80000000)
3579 rport
->supported_classes
|= FC_COS_CLASS3
;
3581 tgt_dbg(tgt
, "rport add failed\n");
3582 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3586 * ibmvfc_do_work - Do task level work
3587 * @vhost: ibmvfc host struct
3590 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
3592 struct ibmvfc_target
*tgt
;
3593 unsigned long flags
;
3594 struct fc_rport
*rport
;
3596 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
3597 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3598 vhost
->events_to_log
= 0;
3599 switch (vhost
->action
) {
3600 case IBMVFC_HOST_ACTION_NONE
:
3601 case IBMVFC_HOST_ACTION_INIT_WAIT
:
3603 case IBMVFC_HOST_ACTION_INIT
:
3604 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
3605 vhost
->job_step(vhost
);
3607 case IBMVFC_HOST_ACTION_QUERY
:
3608 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3609 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
3610 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
3612 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
3613 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3614 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
3620 if (!ibmvfc_dev_init_to_do(vhost
))
3621 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
3623 case IBMVFC_HOST_ACTION_TGT_DEL
:
3624 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3625 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
3626 tgt_dbg(tgt
, "Deleting rport\n");
3629 list_del(&tgt
->queue
);
3630 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3632 fc_remote_port_delete(rport
);
3633 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3638 if (vhost
->state
== IBMVFC_INITIALIZING
) {
3639 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
3640 vhost
->job_step
= ibmvfc_discover_targets
;
3642 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
3643 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3644 scsi_unblock_requests(vhost
->host
);
3645 wake_up(&vhost
->init_wait_q
);
3649 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
3650 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
3651 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3652 ibmvfc_alloc_targets(vhost
);
3653 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3655 case IBMVFC_HOST_ACTION_TGT_INIT
:
3656 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3657 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
3663 if (!ibmvfc_dev_init_to_do(vhost
)) {
3664 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
3665 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_ADD
);
3666 vhost
->init_retries
= 0;
3667 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3668 scsi_unblock_requests(vhost
->host
);
3672 case IBMVFC_HOST_ACTION_TGT_ADD
:
3673 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3674 if (tgt
->action
== IBMVFC_TGT_ACTION_ADD_RPORT
) {
3675 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3676 ibmvfc_tgt_add_rport(tgt
);
3678 } else if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
3679 tgt_dbg(tgt
, "Deleting rport\n");
3682 list_del(&tgt
->queue
);
3683 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3685 fc_remote_port_delete(rport
);
3686 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3691 if (vhost
->reinit
&& !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
3693 scsi_block_requests(vhost
->host
);
3694 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3696 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
3697 wake_up(&vhost
->init_wait_q
);
3704 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3708 * ibmvfc_work - Do task level work
3709 * @data: ibmvfc host struct
3714 static int ibmvfc_work(void *data
)
3716 struct ibmvfc_host
*vhost
= data
;
3719 set_user_nice(current
, -20);
3722 rc
= wait_event_interruptible(vhost
->work_wait_q
,
3723 ibmvfc_work_to_do(vhost
));
3727 if (kthread_should_stop())
3730 ibmvfc_do_work(vhost
);
3733 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
3738 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3739 * @vhost: ibmvfc host struct
3741 * Allocates a page for messages, maps it for dma, and registers
3742 * the crq with the hypervisor.
3745 * zero on success / other on failure
3747 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
3749 int rc
, retrc
= -ENOMEM
;
3750 struct device
*dev
= vhost
->dev
;
3751 struct vio_dev
*vdev
= to_vio_dev(dev
);
3752 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
3755 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
3760 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
3761 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
3762 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
3764 if (dma_mapping_error(dev
, crq
->msg_token
))
3767 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
3768 crq
->msg_token
, PAGE_SIZE
);
3770 if (rc
== H_RESOURCE
)
3771 /* maybe kexecing and resource is busy. try a reset */
3772 retrc
= rc
= ibmvfc_reset_crq(vhost
);
3775 dev_warn(dev
, "Partner adapter not ready\n");
3777 dev_warn(dev
, "Error %d opening adapter\n", rc
);
3778 goto reg_crq_failed
;
3783 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
3784 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
3785 goto req_irq_failed
;
3788 if ((rc
= vio_enable_interrupts(vdev
))) {
3789 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
3790 goto req_irq_failed
;
3799 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
3800 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
3802 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
3804 free_page((unsigned long)crq
->msgs
);
3809 * ibmvfc_free_mem - Free memory for vhost
3810 * @vhost: ibmvfc host struct
3815 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
3817 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
3820 mempool_destroy(vhost
->tgt_pool
);
3821 kfree(vhost
->trace
);
3822 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
3823 vhost
->disc_buf_dma
);
3824 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
3825 vhost
->login_buf
, vhost
->login_buf_dma
);
3826 dma_pool_destroy(vhost
->sg_pool
);
3827 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
3828 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
3829 free_page((unsigned long)async_q
->msgs
);
3834 * ibmvfc_alloc_mem - Allocate memory for vhost
3835 * @vhost: ibmvfc host struct
3838 * 0 on success / non-zero on failure
3840 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
3842 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
3843 struct device
*dev
= vhost
->dev
;
3846 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
3847 if (!async_q
->msgs
) {
3848 dev_err(dev
, "Couldn't allocate async queue.\n");
3852 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
3853 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
3854 async_q
->size
* sizeof(*async_q
->msgs
),
3857 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
3858 dev_err(dev
, "Failed to map async queue\n");
3859 goto free_async_crq
;
3862 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
3863 SG_ALL
* sizeof(struct srp_direct_buf
),
3864 sizeof(struct srp_direct_buf
), 0);
3866 if (!vhost
->sg_pool
) {
3867 dev_err(dev
, "Failed to allocate sg pool\n");
3868 goto unmap_async_crq
;
3871 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
3872 &vhost
->login_buf_dma
, GFP_KERNEL
);
3874 if (!vhost
->login_buf
) {
3875 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
3879 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
3880 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
3881 &vhost
->disc_buf_dma
, GFP_KERNEL
);
3883 if (!vhost
->disc_buf
) {
3884 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
3885 goto free_login_buffer
;
3888 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
3889 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
3892 goto free_disc_buffer
;
3894 vhost
->tgt_pool
= mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
3895 sizeof(struct ibmvfc_target
));
3897 if (!vhost
->tgt_pool
) {
3898 dev_err(dev
, "Couldn't allocate target memory pool\n");
3906 kfree(vhost
->trace
);
3908 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
3909 vhost
->disc_buf_dma
);
3911 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
3912 vhost
->login_buf
, vhost
->login_buf_dma
);
3914 dma_pool_destroy(vhost
->sg_pool
);
3916 dma_unmap_single(dev
, async_q
->msg_token
,
3917 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
3919 free_page((unsigned long)async_q
->msgs
);
3926 * ibmvfc_probe - Adapter hot plug add entry point
3927 * @vdev: vio device struct
3928 * @id: vio device id struct
3931 * 0 on success / non-zero on failure
3933 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
3935 struct ibmvfc_host
*vhost
;
3936 struct Scsi_Host
*shost
;
3937 struct device
*dev
= &vdev
->dev
;
3941 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
3943 dev_err(dev
, "Couldn't allocate host data\n");
3947 shost
->transportt
= ibmvfc_transport_template
;
3948 shost
->can_queue
= max_requests
;
3949 shost
->max_lun
= max_lun
;
3950 shost
->max_id
= max_targets
;
3951 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
3952 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
3953 shost
->unique_id
= shost
->host_no
;
3955 vhost
= shost_priv(shost
);
3956 INIT_LIST_HEAD(&vhost
->sent
);
3957 INIT_LIST_HEAD(&vhost
->free
);
3958 INIT_LIST_HEAD(&vhost
->targets
);
3959 sprintf(vhost
->name
, IBMVFC_NAME
);
3960 vhost
->host
= shost
;
3962 vhost
->partition_number
= -1;
3963 vhost
->log_level
= log_level
;
3964 strcpy(vhost
->partition_name
, "UNKNOWN");
3965 init_waitqueue_head(&vhost
->work_wait_q
);
3966 init_waitqueue_head(&vhost
->init_wait_q
);
3968 if ((rc
= ibmvfc_alloc_mem(vhost
)))
3969 goto free_scsi_host
;
3971 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
3974 if (IS_ERR(vhost
->work_thread
)) {
3975 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
3976 PTR_ERR(vhost
->work_thread
));
3980 if ((rc
= ibmvfc_init_crq(vhost
))) {
3981 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
3985 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
3986 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
3990 if ((rc
= scsi_add_host(shost
, dev
)))
3991 goto release_event_pool
;
3993 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
3994 &ibmvfc_trace_attr
))) {
3995 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
3999 dev_set_drvdata(dev
, vhost
);
4000 spin_lock(&ibmvfc_driver_lock
);
4001 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4002 spin_unlock(&ibmvfc_driver_lock
);
4004 ibmvfc_send_crq_init(vhost
);
4005 scsi_scan_host(shost
);
4009 scsi_remove_host(shost
);
4011 ibmvfc_free_event_pool(vhost
);
4013 ibmvfc_release_crq_queue(vhost
);
4015 kthread_stop(vhost
->work_thread
);
4017 ibmvfc_free_mem(vhost
);
4019 scsi_host_put(shost
);
4026 * ibmvfc_remove - Adapter hot plug remove entry point
4027 * @vdev: vio device struct
4032 static int ibmvfc_remove(struct vio_dev
*vdev
)
4034 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4035 unsigned long flags
;
4038 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4039 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4040 ibmvfc_wait_while_resetting(vhost
);
4041 ibmvfc_release_crq_queue(vhost
);
4042 kthread_stop(vhost
->work_thread
);
4043 fc_remove_host(vhost
->host
);
4044 scsi_remove_host(vhost
->host
);
4046 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4047 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4048 ibmvfc_free_event_pool(vhost
);
4049 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4051 ibmvfc_free_mem(vhost
);
4052 spin_lock(&ibmvfc_driver_lock
);
4053 list_del(&vhost
->queue
);
4054 spin_unlock(&ibmvfc_driver_lock
);
4055 scsi_host_put(vhost
->host
);
4061 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4062 * @vdev: vio device struct
4065 * Number of bytes the driver will need to DMA map at the same time in
4066 * order to perform well.
4068 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4070 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4071 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4074 static struct vio_device_id ibmvfc_device_table
[] __devinitdata
= {
4075 {"fcp", "IBM,vfc-client"},
4078 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4080 static struct vio_driver ibmvfc_driver
= {
4081 .id_table
= ibmvfc_device_table
,
4082 .probe
= ibmvfc_probe
,
4083 .remove
= ibmvfc_remove
,
4084 .get_desired_dma
= ibmvfc_get_desired_dma
,
4086 .name
= IBMVFC_NAME
,
4087 .owner
= THIS_MODULE
,
4091 static struct fc_function_template ibmvfc_transport_functions
= {
4092 .show_host_fabric_name
= 1,
4093 .show_host_node_name
= 1,
4094 .show_host_port_name
= 1,
4095 .show_host_supported_classes
= 1,
4096 .show_host_port_type
= 1,
4097 .show_host_port_id
= 1,
4099 .get_host_port_state
= ibmvfc_get_host_port_state
,
4100 .show_host_port_state
= 1,
4102 .get_host_speed
= ibmvfc_get_host_speed
,
4103 .show_host_speed
= 1,
4105 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4106 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4108 .show_rport_maxframe_size
= 1,
4109 .show_rport_supported_classes
= 1,
4111 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4112 .show_rport_dev_loss_tmo
= 1,
4114 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4115 .show_starget_node_name
= 1,
4117 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4118 .show_starget_port_name
= 1,
4120 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4121 .show_starget_port_id
= 1,
4125 * ibmvfc_module_init - Initialize the ibmvfc module
4128 * 0 on success / other on failure
4130 static int __init
ibmvfc_module_init(void)
4134 if (!firmware_has_feature(FW_FEATURE_VIO
))
4137 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
4138 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
4140 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
4141 if (!ibmvfc_transport_template
)
4144 rc
= vio_register_driver(&ibmvfc_driver
);
4146 fc_release_transport(ibmvfc_transport_template
);
4151 * ibmvfc_module_exit - Teardown the ibmvfc module
4156 static void __exit
ibmvfc_module_exit(void)
4158 vio_unregister_driver(&ibmvfc_driver
);
4159 fc_release_transport(ibmvfc_transport_template
);
4162 module_init(ibmvfc_module_init
);
4163 module_exit(ibmvfc_module_exit
);