2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
34 #include <linux/stringify.h>
35 #include <asm/firmware.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_tcq.h>
43 #include <scsi/scsi_transport_fc.h>
44 #include <scsi/scsi_bsg_fc.h>
47 static unsigned int init_timeout
= IBMVFC_INIT_TIMEOUT
;
48 static unsigned int default_timeout
= IBMVFC_DEFAULT_TIMEOUT
;
49 static unsigned int max_lun
= IBMVFC_MAX_LUN
;
50 static unsigned int max_targets
= IBMVFC_MAX_TARGETS
;
51 static unsigned int max_requests
= IBMVFC_MAX_REQUESTS_DEFAULT
;
52 static unsigned int disc_threads
= IBMVFC_MAX_DISC_THREADS
;
53 static unsigned int dev_loss_tmo
= IBMVFC_DEV_LOSS_TMO
;
54 static unsigned int ibmvfc_debug
= IBMVFC_DEBUG
;
55 static unsigned int log_level
= IBMVFC_DEFAULT_LOG_LEVEL
;
56 static LIST_HEAD(ibmvfc_head
);
57 static DEFINE_SPINLOCK(ibmvfc_driver_lock
);
58 static struct scsi_transport_template
*ibmvfc_transport_template
;
60 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
61 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
62 MODULE_LICENSE("GPL");
63 MODULE_VERSION(IBMVFC_DRIVER_VERSION
);
65 module_param_named(init_timeout
, init_timeout
, uint
, S_IRUGO
| S_IWUSR
);
66 MODULE_PARM_DESC(init_timeout
, "Initialization timeout in seconds. "
67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT
) "]");
68 module_param_named(default_timeout
, default_timeout
, uint
, S_IRUGO
| S_IWUSR
);
69 MODULE_PARM_DESC(default_timeout
,
70 "Default timeout in seconds for initialization and EH commands. "
71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT
) "]");
72 module_param_named(max_requests
, max_requests
, uint
, S_IRUGO
);
73 MODULE_PARM_DESC(max_requests
, "Maximum requests for this adapter. "
74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT
) "]");
75 module_param_named(max_lun
, max_lun
, uint
, S_IRUGO
);
76 MODULE_PARM_DESC(max_lun
, "Maximum allowed LUN. "
77 "[Default=" __stringify(IBMVFC_MAX_LUN
) "]");
78 module_param_named(max_targets
, max_targets
, uint
, S_IRUGO
);
79 MODULE_PARM_DESC(max_targets
, "Maximum allowed targets. "
80 "[Default=" __stringify(IBMVFC_MAX_TARGETS
) "]");
81 module_param_named(disc_threads
, disc_threads
, uint
, S_IRUGO
);
82 MODULE_PARM_DESC(disc_threads
, "Number of device discovery threads to use. "
83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS
) "]");
84 module_param_named(debug
, ibmvfc_debug
, uint
, S_IRUGO
| S_IWUSR
);
85 MODULE_PARM_DESC(debug
, "Enable driver debug information. "
86 "[Default=" __stringify(IBMVFC_DEBUG
) "]");
87 module_param_named(dev_loss_tmo
, dev_loss_tmo
, uint
, S_IRUGO
| S_IWUSR
);
88 MODULE_PARM_DESC(dev_loss_tmo
, "Maximum number of seconds that the FC "
89 "transport should insulate the loss of a remote port. Once this "
90 "value is exceeded, the scsi target is removed. "
91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO
) "]");
92 module_param_named(log_level
, log_level
, uint
, 0);
93 MODULE_PARM_DESC(log_level
, "Set to 0 - 4 for increasing verbosity of device driver. "
94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL
) "]");
104 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_ESTABLISH
, DID_ERROR
, 1, 1, "unable to establish" },
105 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_FAULT
, DID_OK
, 1, 0, "transport fault" },
106 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CMD_TIMEOUT
, DID_TIME_OUT
, 1, 1, "command timeout" },
107 { IBMVFC_FABRIC_MAPPED
, IBMVFC_ENETDOWN
, DID_TRANSPORT_DISRUPTED
, 1, 1, "network down" },
108 { IBMVFC_FABRIC_MAPPED
, IBMVFC_HW_FAILURE
, DID_ERROR
, 1, 1, "hardware failure" },
109 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DOWN_ERR
, DID_REQUEUE
, 0, 0, "link down" },
110 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DEAD_ERR
, DID_ERROR
, 0, 0, "link dead" },
111 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_REGISTER
, DID_ERROR
, 1, 1, "unable to register" },
112 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_BUSY
, DID_BUS_BUSY
, 1, 0, "transport busy" },
113 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_DEAD
, DID_ERROR
, 0, 1, "transport dead" },
114 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CONFIG_ERROR
, DID_ERROR
, 1, 1, "configuration error" },
115 { IBMVFC_FABRIC_MAPPED
, IBMVFC_NAME_SERVER_FAIL
, DID_ERROR
, 1, 1, "name server failure" },
116 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_HALTED
, DID_REQUEUE
, 1, 0, "link halted" },
117 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_GENERAL
, DID_OK
, 1, 0, "general transport error" },
119 { IBMVFC_VIOS_FAILURE
, IBMVFC_CRQ_FAILURE
, DID_REQUEUE
, 1, 1, "CRQ failure" },
120 { IBMVFC_VIOS_FAILURE
, IBMVFC_SW_FAILURE
, DID_ERROR
, 0, 1, "software failure" },
121 { IBMVFC_VIOS_FAILURE
, IBMVFC_INVALID_PARAMETER
, DID_ERROR
, 0, 1, "invalid parameter" },
122 { IBMVFC_VIOS_FAILURE
, IBMVFC_MISSING_PARAMETER
, DID_ERROR
, 0, 1, "missing parameter" },
123 { IBMVFC_VIOS_FAILURE
, IBMVFC_HOST_IO_BUS
, DID_ERROR
, 1, 1, "host I/O bus failure" },
124 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED
, DID_ERROR
, 0, 1, "transaction cancelled" },
125 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED_IMPLICIT
, DID_ERROR
, 0, 1, "transaction cancelled implicit" },
126 { IBMVFC_VIOS_FAILURE
, IBMVFC_INSUFFICIENT_RESOURCE
, DID_REQUEUE
, 1, 1, "insufficient resources" },
127 { IBMVFC_VIOS_FAILURE
, IBMVFC_PLOGI_REQUIRED
, DID_ERROR
, 0, 1, "port login required" },
128 { IBMVFC_VIOS_FAILURE
, IBMVFC_COMMAND_FAILED
, DID_ERROR
, 1, 1, "command failed" },
130 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_ELS_CMD_CODE
, DID_ERROR
, 0, 1, "invalid ELS command code" },
131 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_VERSION
, DID_ERROR
, 0, 1, "invalid version level" },
132 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_ERROR
, DID_ERROR
, 1, 1, "logical error" },
133 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_CT_IU_SIZE
, DID_ERROR
, 0, 1, "invalid CT_IU size" },
134 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_BUSY
, DID_REQUEUE
, 1, 0, "logical busy" },
135 { IBMVFC_FC_FAILURE
, IBMVFC_PROTOCOL_ERROR
, DID_ERROR
, 1, 1, "protocol error" },
136 { IBMVFC_FC_FAILURE
, IBMVFC_UNABLE_TO_PERFORM_REQ
, DID_ERROR
, 1, 1, "unable to perform request" },
137 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_NOT_SUPPORTED
, DID_ERROR
, 0, 0, "command not supported" },
138 { IBMVFC_FC_FAILURE
, IBMVFC_SERVER_NOT_AVAIL
, DID_ERROR
, 0, 1, "server not available" },
139 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_IN_PROGRESS
, DID_ERROR
, 0, 1, "command already in progress" },
140 { IBMVFC_FC_FAILURE
, IBMVFC_VENDOR_SPECIFIC
, DID_ERROR
, 1, 1, "vendor specific" },
142 { IBMVFC_FC_SCSI_ERROR
, 0, DID_OK
, 1, 0, "SCSI error" },
145 static void ibmvfc_npiv_login(struct ibmvfc_host
*);
146 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*);
147 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*);
148 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*);
149 static void ibmvfc_npiv_logout(struct ibmvfc_host
*);
151 static const char *unknown_error
= "unknown error";
153 #ifdef CONFIG_SCSI_IBMVFC_TRACE
155 * ibmvfc_trc_start - Log a start trace entry
156 * @evt: ibmvfc event struct
159 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
161 struct ibmvfc_host
*vhost
= evt
->vhost
;
162 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
163 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
164 struct ibmvfc_trace_entry
*entry
;
166 entry
= &vhost
->trace
[vhost
->trace_index
++];
168 entry
->time
= jiffies
;
169 entry
->fmt
= evt
->crq
.format
;
170 entry
->type
= IBMVFC_TRC_START
;
172 switch (entry
->fmt
) {
173 case IBMVFC_CMD_FORMAT
:
174 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
175 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
176 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
177 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
178 entry
->u
.start
.xfer_len
= vfc_cmd
->iu
.xfer_len
;
180 case IBMVFC_MAD_FORMAT
:
181 entry
->op_code
= mad
->opcode
;
189 * ibmvfc_trc_end - Log an end trace entry
190 * @evt: ibmvfc event struct
193 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
195 struct ibmvfc_host
*vhost
= evt
->vhost
;
196 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
197 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
198 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
201 entry
->time
= jiffies
;
202 entry
->fmt
= evt
->crq
.format
;
203 entry
->type
= IBMVFC_TRC_END
;
205 switch (entry
->fmt
) {
206 case IBMVFC_CMD_FORMAT
:
207 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
208 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
209 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
210 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
211 entry
->u
.end
.status
= vfc_cmd
->status
;
212 entry
->u
.end
.error
= vfc_cmd
->error
;
213 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
214 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
215 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
217 case IBMVFC_MAD_FORMAT
:
218 entry
->op_code
= mad
->opcode
;
219 entry
->u
.end
.status
= mad
->status
;
228 #define ibmvfc_trc_start(evt) do { } while (0)
229 #define ibmvfc_trc_end(evt) do { } while (0)
233 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
234 * @status: status / error class
238 * index into cmd_status / -EINVAL on failure
240 static int ibmvfc_get_err_index(u16 status
, u16 error
)
244 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
245 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
246 cmd_status
[i
].error
== error
)
253 * ibmvfc_get_cmd_error - Find the error description for the fcp response
254 * @status: status / error class
258 * error description string
260 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
262 int rc
= ibmvfc_get_err_index(status
, error
);
264 return cmd_status
[rc
].name
;
265 return unknown_error
;
269 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
270 * @vfc_cmd: ibmvfc command struct
273 * SCSI result value to return for completed command
275 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
278 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
279 int fc_rsp_len
= rsp
->fcp_rsp_len
;
281 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
282 ((fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
283 rsp
->data
.info
.rsp_code
))
284 return DID_ERROR
<< 16;
286 err
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
288 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
289 return rsp
->scsi_status
| (DID_ERROR
<< 16);
293 * ibmvfc_retry_cmd - Determine if error status is retryable
294 * @status: status / error class
298 * 1 if error should be retried / 0 if it should not
300 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
302 int rc
= ibmvfc_get_err_index(status
, error
);
305 return cmd_status
[rc
].retry
;
309 static const char *unknown_fc_explain
= "unknown fc explain";
311 static const struct {
315 { 0x00, "no additional explanation" },
316 { 0x01, "service parameter error - options" },
317 { 0x03, "service parameter error - initiator control" },
318 { 0x05, "service parameter error - recipient control" },
319 { 0x07, "service parameter error - received data field size" },
320 { 0x09, "service parameter error - concurrent seq" },
321 { 0x0B, "service parameter error - credit" },
322 { 0x0D, "invalid N_Port/F_Port_Name" },
323 { 0x0E, "invalid node/Fabric Name" },
324 { 0x0F, "invalid common service parameters" },
325 { 0x11, "invalid association header" },
326 { 0x13, "association header required" },
327 { 0x15, "invalid originator S_ID" },
328 { 0x17, "invalid OX_ID-RX-ID combination" },
329 { 0x19, "command (request) already in progress" },
330 { 0x1E, "N_Port Login requested" },
331 { 0x1F, "Invalid N_Port_ID" },
334 static const struct {
338 { 0x00, "no additional explanation" },
339 { 0x01, "port identifier not registered" },
340 { 0x02, "port name not registered" },
341 { 0x03, "node name not registered" },
342 { 0x04, "class of service not registered" },
343 { 0x06, "initial process associator not registered" },
344 { 0x07, "FC-4 TYPEs not registered" },
345 { 0x08, "symbolic port name not registered" },
346 { 0x09, "symbolic node name not registered" },
347 { 0x0A, "port type not registered" },
348 { 0xF0, "authorization exception" },
349 { 0xF1, "authentication exception" },
350 { 0xF2, "data base full" },
351 { 0xF3, "data base empty" },
352 { 0xF4, "processing request" },
353 { 0xF5, "unable to verify connection" },
354 { 0xF6, "devices not in a common zone" },
358 * ibmvfc_get_ls_explain - Return the FC Explain description text
359 * @status: FC Explain status
364 static const char *ibmvfc_get_ls_explain(u16 status
)
368 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
369 if (ls_explain
[i
].fc_explain
== status
)
370 return ls_explain
[i
].name
;
372 return unknown_fc_explain
;
376 * ibmvfc_get_gs_explain - Return the FC Explain description text
377 * @status: FC Explain status
382 static const char *ibmvfc_get_gs_explain(u16 status
)
386 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
387 if (gs_explain
[i
].fc_explain
== status
)
388 return gs_explain
[i
].name
;
390 return unknown_fc_explain
;
393 static const struct {
394 enum ibmvfc_fc_type fc_type
;
397 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
398 { IBMVFC_PORT_REJECT
, "port reject" },
399 { IBMVFC_LS_REJECT
, "ELS reject" },
400 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
401 { IBMVFC_PORT_BUSY
, "port busy" },
402 { IBMVFC_BASIC_REJECT
, "basic reject" },
405 static const char *unknown_fc_type
= "unknown fc type";
408 * ibmvfc_get_fc_type - Return the FC Type description text
409 * @status: FC Type error status
414 static const char *ibmvfc_get_fc_type(u16 status
)
418 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
419 if (fc_type
[i
].fc_type
== status
)
420 return fc_type
[i
].name
;
422 return unknown_fc_type
;
426 * ibmvfc_set_tgt_action - Set the next init action for the target
427 * @tgt: ibmvfc target struct
428 * @action: action to perform
431 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
432 enum ibmvfc_target_action action
)
434 switch (tgt
->action
) {
435 case IBMVFC_TGT_ACTION_DEL_RPORT
:
438 if (action
== IBMVFC_TGT_ACTION_DEL_RPORT
)
440 tgt
->action
= action
;
446 * ibmvfc_set_host_state - Set the state for the host
447 * @vhost: ibmvfc host struct
448 * @state: state to set host to
451 * 0 if state changed / non-zero if not changed
453 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
454 enum ibmvfc_host_state state
)
458 switch (vhost
->state
) {
459 case IBMVFC_HOST_OFFLINE
:
463 vhost
->state
= state
;
471 * ibmvfc_set_host_action - Set the next init action for the host
472 * @vhost: ibmvfc host struct
473 * @action: action to perform
476 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
477 enum ibmvfc_host_action action
)
480 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
481 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
482 vhost
->action
= action
;
484 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
485 if (vhost
->action
== IBMVFC_HOST_ACTION_LOGO
)
486 vhost
->action
= action
;
488 case IBMVFC_HOST_ACTION_INIT_WAIT
:
489 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
490 vhost
->action
= action
;
492 case IBMVFC_HOST_ACTION_QUERY
:
493 switch (vhost
->action
) {
494 case IBMVFC_HOST_ACTION_INIT_WAIT
:
495 case IBMVFC_HOST_ACTION_NONE
:
496 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
497 vhost
->action
= action
;
503 case IBMVFC_HOST_ACTION_TGT_INIT
:
504 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
505 vhost
->action
= action
;
507 case IBMVFC_HOST_ACTION_LOGO
:
508 case IBMVFC_HOST_ACTION_INIT
:
509 case IBMVFC_HOST_ACTION_TGT_DEL
:
510 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
511 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
512 case IBMVFC_HOST_ACTION_NONE
:
514 vhost
->action
= action
;
520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
521 * @vhost: ibmvfc host struct
526 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
528 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
529 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
530 scsi_block_requests(vhost
->host
);
531 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
536 wake_up(&vhost
->work_wait_q
);
540 * ibmvfc_link_down - Handle a link down event from the adapter
541 * @vhost: ibmvfc host struct
542 * @state: ibmvfc host state to enter
545 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
546 enum ibmvfc_host_state state
)
548 struct ibmvfc_target
*tgt
;
551 scsi_block_requests(vhost
->host
);
552 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
553 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
554 ibmvfc_set_host_state(vhost
, state
);
555 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
556 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
557 wake_up(&vhost
->work_wait_q
);
562 * ibmvfc_init_host - Start host initialization
563 * @vhost: ibmvfc host struct
568 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
)
570 struct ibmvfc_target
*tgt
;
572 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
573 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
575 "Host initialization retries exceeded. Taking adapter offline\n");
576 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
581 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
582 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
583 vhost
->async_crq
.cur
= 0;
585 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
586 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
587 scsi_block_requests(vhost
->host
);
588 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
589 vhost
->job_step
= ibmvfc_npiv_login
;
590 wake_up(&vhost
->work_wait_q
);
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
601 * 0 on success / other on failure
603 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
605 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
606 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
614 * 0 on success / other on failure
616 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
618 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
627 * 0 on success / other on failure
629 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
631 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
642 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
645 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
646 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
648 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
649 free_irq(vdev
->irq
, vhost
);
650 tasklet_kill(&vhost
->tasklet
);
652 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
653 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
655 vhost
->state
= IBMVFC_NO_CRQ
;
656 vhost
->logged_in
= 0;
657 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
658 free_page((unsigned long)crq
->msgs
);
662 * ibmvfc_reenable_crq_queue - reenables the CRQ
663 * @vhost: ibmvfc host struct
666 * 0 on success / other on failure
668 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
671 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
673 /* Re-enable the CRQ */
675 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
676 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
679 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
685 * ibmvfc_reset_crq - resets a crq after a failure
686 * @vhost: ibmvfc host struct
689 * 0 on success / other on failure
691 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
694 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
695 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
699 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
700 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
702 vhost
->state
= IBMVFC_NO_CRQ
;
703 vhost
->logged_in
= 0;
704 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
706 /* Clean out the queue */
707 memset(crq
->msgs
, 0, PAGE_SIZE
);
710 /* And re-open it again */
711 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
712 crq
->msg_token
, PAGE_SIZE
);
715 /* Adapter is good, but other end is not ready */
716 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
718 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
724 * ibmvfc_valid_event - Determines if event is valid.
725 * @pool: event_pool that contains the event
726 * @evt: ibmvfc event to be checked for validity
729 * 1 if event is valid / 0 if event is not valid
731 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
732 struct ibmvfc_event
*evt
)
734 int index
= evt
- pool
->events
;
735 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
737 if (evt
!= pool
->events
+ index
) /* unaligned */
743 * ibmvfc_free_event - Free the specified event
744 * @evt: ibmvfc_event to be freed
747 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
749 struct ibmvfc_host
*vhost
= evt
->vhost
;
750 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
752 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
753 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
754 list_add_tail(&evt
->queue
, &vhost
->free
);
758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
759 * @evt: ibmvfc event struct
761 * This function does not setup any error status, that must be done
762 * before this function gets called.
764 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
766 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
769 scsi_dma_unmap(cmnd
);
770 cmnd
->scsi_done(cmnd
);
774 complete(evt
->eh_comp
);
776 ibmvfc_free_event(evt
);
780 * ibmvfc_fail_request - Fail request with specified error code
781 * @evt: ibmvfc event struct
782 * @error_code: error code to fail request with
787 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
790 evt
->cmnd
->result
= (error_code
<< 16);
791 evt
->done
= ibmvfc_scsi_eh_done
;
793 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_DRIVER_FAILED
;
795 list_del(&evt
->queue
);
796 del_timer(&evt
->timer
);
802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
803 * @vhost: ibmvfc host struct
804 * @error_code: error code to fail requests with
809 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
811 struct ibmvfc_event
*evt
, *pos
;
813 ibmvfc_dbg(vhost
, "Purging all requests\n");
814 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
815 ibmvfc_fail_request(evt
, error_code
);
819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
820 * @vhost: struct ibmvfc host to reset
822 static void ibmvfc_hard_reset_host(struct ibmvfc_host
*vhost
)
826 scsi_block_requests(vhost
->host
);
827 ibmvfc_purge_requests(vhost
, DID_ERROR
);
828 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
829 (rc
= ibmvfc_send_crq_init(vhost
)) ||
830 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
831 dev_err(vhost
->dev
, "Error after reset rc=%d\n", rc
);
832 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
834 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
839 * @vhost: struct ibmvfc host to reset
841 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
843 if (vhost
->logged_in
&& vhost
->action
!= IBMVFC_HOST_ACTION_LOGO_WAIT
&&
844 !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
845 scsi_block_requests(vhost
->host
);
846 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO
);
847 vhost
->job_step
= ibmvfc_npiv_logout
;
848 wake_up(&vhost
->work_wait_q
);
850 ibmvfc_hard_reset_host(vhost
);
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
857 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
861 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
862 __ibmvfc_reset_host(vhost
);
863 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
870 * Returns: 1 if init will be retried / 0 if not
873 static int ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
877 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
878 vhost
->delay_init
= 1;
879 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
883 } else if (vhost
->init_retries
== IBMVFC_MAX_HOST_INIT_RETRIES
)
884 __ibmvfc_reset_host(vhost
);
886 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
891 wake_up(&vhost
->work_wait_q
);
896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
897 * @starget: scsi target struct
900 * ibmvfc_target struct / NULL if not found
902 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
904 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
905 struct ibmvfc_host
*vhost
= shost_priv(shost
);
906 struct ibmvfc_target
*tgt
;
908 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
909 if (tgt
->target_id
== starget
->id
) {
910 kref_get(&tgt
->kref
);
917 * ibmvfc_get_target - Find the specified scsi_target
918 * @starget: scsi target struct
921 * ibmvfc_target struct / NULL if not found
923 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
925 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
926 struct ibmvfc_target
*tgt
;
929 spin_lock_irqsave(shost
->host_lock
, flags
);
930 tgt
= __ibmvfc_get_target(starget
);
931 spin_unlock_irqrestore(shost
->host_lock
, flags
);
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
942 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
944 struct ibmvfc_host
*vhost
= shost_priv(shost
);
947 spin_lock_irqsave(shost
->host_lock
, flags
);
948 if (vhost
->state
== IBMVFC_ACTIVE
) {
949 switch (vhost
->login_buf
->resp
.link_speed
/ 100) {
951 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
954 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
957 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
960 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
963 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
966 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
969 ibmvfc_log(vhost
, 3, "Unknown port speed: %lld Gbit\n",
970 vhost
->login_buf
->resp
.link_speed
/ 100);
971 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
975 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
976 spin_unlock_irqrestore(shost
->host_lock
, flags
);
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
986 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
988 struct ibmvfc_host
*vhost
= shost_priv(shost
);
991 spin_lock_irqsave(shost
->host_lock
, flags
);
992 switch (vhost
->state
) {
993 case IBMVFC_INITIALIZING
:
995 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
997 case IBMVFC_LINK_DOWN
:
998 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
1000 case IBMVFC_LINK_DEAD
:
1001 case IBMVFC_HOST_OFFLINE
:
1002 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
1005 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
1008 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1011 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
1012 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1015 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1026 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
1029 rport
->dev_loss_tmo
= timeout
;
1031 rport
->dev_loss_tmo
= 1;
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1039 static void ibmvfc_release_tgt(struct kref
*kref
)
1041 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1052 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1054 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1055 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1057 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1067 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1069 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1070 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1072 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1082 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1084 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1085 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1087 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1095 * 0 on success / other on failure
1097 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1099 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1100 ((vhost
->state
== IBMVFC_ACTIVE
||
1101 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1102 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1103 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1104 (init_timeout
* HZ
));
1106 return timeout
? 0 : -EIO
;
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1114 * 0 on success / other on failure
1116 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1118 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1120 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost
);
1122 return ibmvfc_wait_while_resetting(vhost
);
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1131 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1133 struct device_node
*rootdn
;
1135 const unsigned int *num
;
1137 rootdn
= of_find_node_by_path("/");
1141 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1143 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1144 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1146 vhost
->partition_number
= *num
;
1147 of_node_put(rootdn
);
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1157 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1159 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1160 struct device_node
*of_node
= vhost
->dev
->archdata
.of_node
;
1161 const char *location
;
1163 memset(login_info
, 0, sizeof(*login_info
));
1165 login_info
->ostype
= IBMVFC_OS_LINUX
;
1166 login_info
->max_dma_len
= IBMVFC_MAX_SECTORS
<< 9;
1167 login_info
->max_payload
= sizeof(struct ibmvfc_fcp_cmd_iu
);
1168 login_info
->max_response
= sizeof(struct ibmvfc_fcp_rsp
);
1169 login_info
->partition_num
= vhost
->partition_number
;
1170 login_info
->vfc_frame_version
= 1;
1171 login_info
->fcp_version
= 3;
1172 login_info
->flags
= IBMVFC_FLUSH_ON_HALT
;
1173 if (vhost
->client_migrated
)
1174 login_info
->flags
|= IBMVFC_CLIENT_MIGRATED
;
1176 login_info
->max_cmds
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1177 login_info
->capabilities
= IBMVFC_CAN_MIGRATE
;
1178 login_info
->async
.va
= vhost
->async_crq
.msg_token
;
1179 login_info
->async
.len
= vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
);
1180 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1181 strncpy(login_info
->device_name
,
1182 dev_name(&vhost
->host
->shost_gendev
), IBMVFC_MAX_NAME
);
1184 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1185 location
= location
? location
: dev_name(vhost
->dev
);
1186 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1193 * Returns zero on success.
1195 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1198 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1201 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1202 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1206 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1207 pool
->size
* sizeof(*pool
->iu_storage
),
1208 &pool
->iu_token
, 0);
1210 if (!pool
->iu_storage
) {
1211 kfree(pool
->events
);
1215 for (i
= 0; i
< pool
->size
; ++i
) {
1216 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1217 atomic_set(&evt
->free
, 1);
1218 evt
->crq
.valid
= 0x80;
1219 evt
->crq
.ioba
= pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
);
1220 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1222 evt
->ext_list
= NULL
;
1223 list_add_tail(&evt
->queue
, &vhost
->free
);
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1235 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1238 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1241 for (i
= 0; i
< pool
->size
; ++i
) {
1242 list_del(&pool
->events
[i
].queue
);
1243 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1244 if (pool
->events
[i
].ext_list
)
1245 dma_pool_free(vhost
->sg_pool
,
1246 pool
->events
[i
].ext_list
,
1247 pool
->events
[i
].ext_list_token
);
1250 kfree(pool
->events
);
1251 dma_free_coherent(vhost
->dev
,
1252 pool
->size
* sizeof(*pool
->iu_storage
),
1253 pool
->iu_storage
, pool
->iu_token
);
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1261 * Returns a free event from the pool.
1263 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1265 struct ibmvfc_event
*evt
;
1267 BUG_ON(list_empty(&vhost
->free
));
1268 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1269 atomic_set(&evt
->free
, 0);
1270 list_del(&evt
->queue
);
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1281 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1282 void (*done
) (struct ibmvfc_event
*), u8 format
)
1285 evt
->sync_iu
= NULL
;
1286 evt
->crq
.format
= format
;
1288 evt
->eh_comp
= NULL
;
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1297 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1298 struct srp_direct_buf
*md
)
1301 struct scatterlist
*sg
;
1303 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1304 md
[i
].va
= sg_dma_address(sg
);
1305 md
[i
].len
= sg_dma_len(sg
);
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1312 * @scmd: Scsi_Cmnd with the scatterlist
1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1318 * 0 on success / non-zero on failure
1320 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1321 struct ibmvfc_event
*evt
,
1322 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1326 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1327 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1329 sg_mapped
= scsi_dma_map(scmd
);
1331 vfc_cmd
->flags
|= IBMVFC_NO_MEM_DESC
;
1333 } else if (unlikely(sg_mapped
< 0)) {
1334 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1335 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1339 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1340 vfc_cmd
->flags
|= IBMVFC_WRITE
;
1341 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1343 vfc_cmd
->flags
|= IBMVFC_READ
;
1344 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1347 if (sg_mapped
== 1) {
1348 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1352 vfc_cmd
->flags
|= IBMVFC_SCATTERLIST
;
1354 if (!evt
->ext_list
) {
1355 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1356 &evt
->ext_list_token
);
1358 if (!evt
->ext_list
) {
1359 scsi_dma_unmap(scmd
);
1360 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1361 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1366 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1368 data
->va
= evt
->ext_list_token
;
1369 data
->len
= sg_mapped
* sizeof(struct srp_direct_buf
);
1375 * ibmvfc_timeout - Internal command timeout handler
1376 * @evt: struct ibmvfc_event that timed out
1378 * Called when an internally generated command times out
1380 static void ibmvfc_timeout(struct ibmvfc_event
*evt
)
1382 struct ibmvfc_host
*vhost
= evt
->vhost
;
1383 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1384 ibmvfc_reset_host(vhost
);
1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1389 * @evt: event to be sent
1390 * @vhost: ibmvfc host struct
1391 * @timeout: timeout in seconds - 0 means do not time command
1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1395 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1396 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1398 u64
*crq_as_u64
= (u64
*) &evt
->crq
;
1401 /* Copy the IU into the transfer area */
1402 *evt
->xfer_iu
= evt
->iu
;
1403 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1404 evt
->xfer_iu
->cmd
.tag
= (u64
)evt
;
1405 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1406 evt
->xfer_iu
->mad_common
.tag
= (u64
)evt
;
1410 list_add_tail(&evt
->queue
, &vhost
->sent
);
1411 init_timer(&evt
->timer
);
1414 evt
->timer
.data
= (unsigned long) evt
;
1415 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1416 evt
->timer
.function
= (void (*)(unsigned long))ibmvfc_timeout
;
1417 add_timer(&evt
->timer
);
1422 if ((rc
= ibmvfc_send_crq(vhost
, crq_as_u64
[0], crq_as_u64
[1]))) {
1423 list_del(&evt
->queue
);
1424 del_timer(&evt
->timer
);
1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1427 * Firmware will send a CRQ with a transport event (0xFF) to
1428 * tell this client what has happened to the transport. This
1429 * will be handled in ibmvfc_handle_crq()
1431 if (rc
== H_CLOSED
) {
1432 if (printk_ratelimit())
1433 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1435 scsi_dma_unmap(evt
->cmnd
);
1436 ibmvfc_free_event(evt
);
1437 return SCSI_MLQUEUE_HOST_BUSY
;
1440 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1442 evt
->cmnd
->result
= DID_ERROR
<< 16;
1443 evt
->done
= ibmvfc_scsi_eh_done
;
1445 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_CRQ_ERROR
;
1449 ibmvfc_trc_start(evt
);
1455 * ibmvfc_log_error - Log an error for the failed command if appropriate
1456 * @evt: ibmvfc event to log
1459 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1461 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1462 struct ibmvfc_host
*vhost
= evt
->vhost
;
1463 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1464 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1465 const char *err
= unknown_error
;
1466 int index
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
1471 logerr
= cmd_status
[index
].log
;
1472 err
= cmd_status
[index
].name
;
1475 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1478 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1479 rsp_code
= rsp
->data
.info
.rsp_code
;
1481 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1483 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1484 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1488 * ibmvfc_relogin - Log back into the specified device
1489 * @sdev: scsi device struct
1492 static void ibmvfc_relogin(struct scsi_device
*sdev
)
1494 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1495 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1496 struct ibmvfc_target
*tgt
;
1498 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1499 if (rport
== tgt
->rport
) {
1500 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
1505 ibmvfc_reinit_host(vhost
);
1509 * ibmvfc_scsi_done - Handle responses from commands
1510 * @evt: ibmvfc event to be handled
1512 * Used as a callback when sending scsi cmds.
1514 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1516 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1517 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1518 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1520 u32 sense_len
= rsp
->fcp_sense_len
;
1523 if (vfc_cmd
->response_flags
& IBMVFC_ADAPTER_RESID_VALID
)
1524 scsi_set_resid(cmnd
, vfc_cmd
->adapter_resid
);
1525 else if (rsp
->flags
& FCP_RESID_UNDER
)
1526 scsi_set_resid(cmnd
, rsp
->fcp_resid
);
1528 scsi_set_resid(cmnd
, 0);
1530 if (vfc_cmd
->status
) {
1531 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1533 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1534 rsp_len
= rsp
->fcp_rsp_len
;
1535 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1536 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1537 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1538 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1539 if ((vfc_cmd
->status
& IBMVFC_VIOS_FAILURE
) && (vfc_cmd
->error
== IBMVFC_PLOGI_REQUIRED
))
1540 ibmvfc_relogin(cmnd
->device
);
1542 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1543 cmnd
->result
= (DID_ERROR
<< 16);
1545 ibmvfc_log_error(evt
);
1548 if (!cmnd
->result
&&
1549 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1550 cmnd
->result
= (DID_ERROR
<< 16);
1552 scsi_dma_unmap(cmnd
);
1553 cmnd
->scsi_done(cmnd
);
1557 complete(evt
->eh_comp
);
1559 ibmvfc_free_event(evt
);
1563 * ibmvfc_host_chkready - Check if the host can accept commands
1564 * @vhost: struct ibmvfc host
1567 * 1 if host can accept command / 0 if not
1569 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1573 switch (vhost
->state
) {
1574 case IBMVFC_LINK_DEAD
:
1575 case IBMVFC_HOST_OFFLINE
:
1576 result
= DID_NO_CONNECT
<< 16;
1579 case IBMVFC_INITIALIZING
:
1581 case IBMVFC_LINK_DOWN
:
1582 result
= DID_REQUEUE
<< 16;
1593 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1594 * @cmnd: struct scsi_cmnd to be executed
1595 * @done: Callback function to be called when cmnd is completed
1598 * 0 on success / other on failure
1600 static int ibmvfc_queuecommand(struct scsi_cmnd
*cmnd
,
1601 void (*done
) (struct scsi_cmnd
*))
1603 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1604 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1605 struct ibmvfc_cmd
*vfc_cmd
;
1606 struct ibmvfc_event
*evt
;
1610 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1611 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1617 cmnd
->result
= (DID_OK
<< 16);
1618 evt
= ibmvfc_get_event(vhost
);
1619 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1621 cmnd
->scsi_done
= done
;
1622 vfc_cmd
= &evt
->iu
.cmd
;
1623 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1624 vfc_cmd
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1625 vfc_cmd
->resp
.len
= sizeof(vfc_cmd
->rsp
);
1626 vfc_cmd
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1627 vfc_cmd
->payload_len
= sizeof(vfc_cmd
->iu
);
1628 vfc_cmd
->resp_len
= sizeof(vfc_cmd
->rsp
);
1629 vfc_cmd
->cancel_key
= (unsigned long)cmnd
->device
->hostdata
;
1630 vfc_cmd
->tgt_scsi_id
= rport
->port_id
;
1631 vfc_cmd
->iu
.xfer_len
= scsi_bufflen(cmnd
);
1632 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1633 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1635 if (scsi_populate_tag_msg(cmnd
, tag
)) {
1636 vfc_cmd
->task_tag
= tag
[1];
1638 case MSG_SIMPLE_TAG
:
1639 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1642 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_HEAD_OF_QUEUE
;
1644 case MSG_ORDERED_TAG
:
1645 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_ORDERED_TASK
;
1650 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1651 return ibmvfc_send_event(evt
, vhost
, 0);
1653 ibmvfc_free_event(evt
);
1655 return SCSI_MLQUEUE_HOST_BUSY
;
1657 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1658 scmd_printk(KERN_ERR
, cmnd
,
1659 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1661 cmnd
->result
= DID_ERROR
<< 16;
1667 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1668 * @evt: ibmvfc event struct
1671 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1673 /* copy the response back */
1675 *evt
->sync_iu
= *evt
->xfer_iu
;
1677 complete(&evt
->comp
);
1681 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1682 * @evt: struct ibmvfc_event
1685 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event
*evt
)
1687 struct ibmvfc_host
*vhost
= evt
->vhost
;
1689 ibmvfc_free_event(evt
);
1690 vhost
->aborting_passthru
= 0;
1691 dev_info(vhost
->dev
, "Passthru command cancelled\n");
1695 * ibmvfc_bsg_timeout - Handle a BSG timeout
1696 * @job: struct fc_bsg_job that timed out
1699 * 0 on success / other on failure
1701 static int ibmvfc_bsg_timeout(struct fc_bsg_job
*job
)
1703 struct ibmvfc_host
*vhost
= shost_priv(job
->shost
);
1704 unsigned long port_id
= (unsigned long)job
->dd_data
;
1705 struct ibmvfc_event
*evt
;
1706 struct ibmvfc_tmf
*tmf
;
1707 unsigned long flags
;
1711 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1712 if (vhost
->aborting_passthru
|| vhost
->state
!= IBMVFC_ACTIVE
) {
1713 __ibmvfc_reset_host(vhost
);
1714 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1718 vhost
->aborting_passthru
= 1;
1719 evt
= ibmvfc_get_event(vhost
);
1720 ibmvfc_init_event(evt
, ibmvfc_bsg_timeout_done
, IBMVFC_MAD_FORMAT
);
1723 memset(tmf
, 0, sizeof(*tmf
));
1724 tmf
->common
.version
= 1;
1725 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
1726 tmf
->common
.length
= sizeof(*tmf
);
1727 tmf
->scsi_id
= port_id
;
1728 tmf
->cancel_key
= IBMVFC_PASSTHRU_CANCEL_KEY
;
1729 tmf
->my_cancel_key
= IBMVFC_INTERNAL_CANCEL_KEY
;
1730 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1733 vhost
->aborting_passthru
= 0;
1734 dev_err(vhost
->dev
, "Failed to send cancel event. rc=%d\n", rc
);
1737 dev_info(vhost
->dev
, "Cancelling passthru command to port id 0x%lx\n",
1740 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1747 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1748 * @vhost: struct ibmvfc_host to send command
1749 * @port_id: port ID to send command
1752 * 0 on success / other on failure
1754 static int ibmvfc_bsg_plogi(struct ibmvfc_host
*vhost
, unsigned int port_id
)
1756 struct ibmvfc_port_login
*plogi
;
1757 struct ibmvfc_target
*tgt
;
1758 struct ibmvfc_event
*evt
;
1759 union ibmvfc_iu rsp_iu
;
1760 unsigned long flags
;
1761 int rc
= 0, issue_login
= 1;
1764 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1765 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1766 if (tgt
->scsi_id
== port_id
) {
1774 if (unlikely((rc
= ibmvfc_host_chkready(vhost
))))
1777 evt
= ibmvfc_get_event(vhost
);
1778 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1779 plogi
= &evt
->iu
.plogi
;
1780 memset(plogi
, 0, sizeof(*plogi
));
1781 plogi
->common
.version
= 1;
1782 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
1783 plogi
->common
.length
= sizeof(*plogi
);
1784 plogi
->scsi_id
= port_id
;
1785 evt
->sync_iu
= &rsp_iu
;
1786 init_completion(&evt
->comp
);
1788 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1789 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1794 wait_for_completion(&evt
->comp
);
1796 if (rsp_iu
.plogi
.common
.status
)
1799 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1800 ibmvfc_free_event(evt
);
1802 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1808 * ibmvfc_bsg_request - Handle a BSG request
1809 * @job: struct fc_bsg_job to be executed
1812 * 0 on success / other on failure
1814 static int ibmvfc_bsg_request(struct fc_bsg_job
*job
)
1816 struct ibmvfc_host
*vhost
= shost_priv(job
->shost
);
1817 struct fc_rport
*rport
= job
->rport
;
1818 struct ibmvfc_passthru_mad
*mad
;
1819 struct ibmvfc_event
*evt
;
1820 union ibmvfc_iu rsp_iu
;
1821 unsigned long flags
, port_id
= -1;
1822 unsigned int code
= job
->request
->msgcode
;
1823 int rc
= 0, req_seg
, rsp_seg
, issue_login
= 0;
1824 u32 fc_flags
, rsp_len
;
1827 job
->reply
->reply_payload_rcv_len
= 0;
1829 port_id
= rport
->port_id
;
1832 case FC_BSG_HST_ELS_NOLOGIN
:
1833 port_id
= (job
->request
->rqst_data
.h_els
.port_id
[0] << 16) |
1834 (job
->request
->rqst_data
.h_els
.port_id
[1] << 8) |
1835 job
->request
->rqst_data
.h_els
.port_id
[2];
1836 case FC_BSG_RPT_ELS
:
1837 fc_flags
= IBMVFC_FC_ELS
;
1841 port_id
= (job
->request
->rqst_data
.h_ct
.port_id
[0] << 16) |
1842 (job
->request
->rqst_data
.h_ct
.port_id
[1] << 8) |
1843 job
->request
->rqst_data
.h_ct
.port_id
[2];
1845 fc_flags
= IBMVFC_FC_CT_IU
;
1853 if (!mutex_trylock(&vhost
->passthru_mutex
))
1856 job
->dd_data
= (void *)port_id
;
1857 req_seg
= dma_map_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1858 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1861 mutex_unlock(&vhost
->passthru_mutex
);
1865 rsp_seg
= dma_map_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1866 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1869 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1870 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1871 mutex_unlock(&vhost
->passthru_mutex
);
1875 if (req_seg
> 1 || rsp_seg
> 1) {
1881 rc
= ibmvfc_bsg_plogi(vhost
, port_id
);
1883 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1885 if (unlikely(rc
|| (rport
&& (rc
= fc_remote_port_chkready(rport
)))) ||
1886 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1887 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1891 evt
= ibmvfc_get_event(vhost
);
1892 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1893 mad
= &evt
->iu
.passthru
;
1895 memset(mad
, 0, sizeof(*mad
));
1896 mad
->common
.version
= 1;
1897 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
1898 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
1900 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
1901 offsetof(struct ibmvfc_passthru_mad
, iu
);
1902 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
1904 mad
->iu
.cmd_len
= job
->request_payload
.payload_len
;
1905 mad
->iu
.rsp_len
= job
->reply_payload
.payload_len
;
1906 mad
->iu
.flags
= fc_flags
;
1907 mad
->iu
.cancel_key
= IBMVFC_PASSTHRU_CANCEL_KEY
;
1909 mad
->iu
.cmd
.va
= sg_dma_address(job
->request_payload
.sg_list
);
1910 mad
->iu
.cmd
.len
= sg_dma_len(job
->request_payload
.sg_list
);
1911 mad
->iu
.rsp
.va
= sg_dma_address(job
->reply_payload
.sg_list
);
1912 mad
->iu
.rsp
.len
= sg_dma_len(job
->reply_payload
.sg_list
);
1913 mad
->iu
.scsi_id
= port_id
;
1914 mad
->iu
.tag
= (u64
)evt
;
1915 rsp_len
= mad
->iu
.rsp
.len
;
1917 evt
->sync_iu
= &rsp_iu
;
1918 init_completion(&evt
->comp
);
1919 rc
= ibmvfc_send_event(evt
, vhost
, 0);
1920 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1927 wait_for_completion(&evt
->comp
);
1929 if (rsp_iu
.passthru
.common
.status
)
1932 job
->reply
->reply_payload_rcv_len
= rsp_len
;
1934 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1935 ibmvfc_free_event(evt
);
1936 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1937 job
->reply
->result
= rc
;
1941 dma_unmap_sg(vhost
->dev
, job
->request_payload
.sg_list
,
1942 job
->request_payload
.sg_cnt
, DMA_TO_DEVICE
);
1943 dma_unmap_sg(vhost
->dev
, job
->reply_payload
.sg_list
,
1944 job
->reply_payload
.sg_cnt
, DMA_FROM_DEVICE
);
1945 mutex_unlock(&vhost
->passthru_mutex
);
1951 * ibmvfc_reset_device - Reset the device with the specified reset type
1952 * @sdev: scsi device to reset
1954 * @desc: reset type description for log messages
1957 * 0 on success / other on failure
1959 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1961 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1962 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1963 struct ibmvfc_cmd
*tmf
;
1964 struct ibmvfc_event
*evt
= NULL
;
1965 union ibmvfc_iu rsp_iu
;
1966 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1967 int rsp_rc
= -EBUSY
;
1968 unsigned long flags
;
1971 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1972 if (vhost
->state
== IBMVFC_ACTIVE
) {
1973 evt
= ibmvfc_get_event(vhost
);
1974 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1977 memset(tmf
, 0, sizeof(*tmf
));
1978 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1979 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1980 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1981 tmf
->payload_len
= sizeof(tmf
->iu
);
1982 tmf
->resp_len
= sizeof(tmf
->rsp
);
1983 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1984 tmf
->tgt_scsi_id
= rport
->port_id
;
1985 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1986 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1987 tmf
->iu
.tmf_flags
= type
;
1988 evt
->sync_iu
= &rsp_iu
;
1990 init_completion(&evt
->comp
);
1991 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1993 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1996 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
2001 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
2002 wait_for_completion(&evt
->comp
);
2004 if (rsp_iu
.cmd
.status
)
2005 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2008 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2009 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2011 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
2012 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2013 desc
, ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
2014 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2015 fc_rsp
->scsi_status
);
2018 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
2020 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2021 ibmvfc_free_event(evt
);
2022 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2027 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2028 * @sdev: scsi device to abort commands
2030 * This sends an Abort Task Set to the VIOS for the specified device. This does
2031 * NOT send any cancel to the VIOS. That must be done separately.
2034 * 0 on success / other on failure
2036 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
2038 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2039 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2040 struct ibmvfc_cmd
*tmf
;
2041 struct ibmvfc_event
*evt
, *found_evt
;
2042 union ibmvfc_iu rsp_iu
;
2043 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
2044 int rsp_rc
= -EBUSY
;
2045 unsigned long flags
;
2048 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2050 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2051 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2058 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2059 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
2060 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2064 if (vhost
->state
== IBMVFC_ACTIVE
) {
2065 evt
= ibmvfc_get_event(vhost
);
2066 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
2069 memset(tmf
, 0, sizeof(*tmf
));
2070 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
2071 tmf
->resp
.len
= sizeof(tmf
->rsp
);
2072 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
2073 tmf
->payload_len
= sizeof(tmf
->iu
);
2074 tmf
->resp_len
= sizeof(tmf
->rsp
);
2075 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
2076 tmf
->tgt_scsi_id
= rport
->port_id
;
2077 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
2078 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
2079 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
2080 evt
->sync_iu
= &rsp_iu
;
2082 init_completion(&evt
->comp
);
2083 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2086 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2089 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
2093 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
2094 wait_for_completion(&evt
->comp
);
2096 if (rsp_iu
.cmd
.status
)
2097 rsp_code
= ibmvfc_get_err_result(&rsp_iu
.cmd
);
2100 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
2101 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
2103 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
2104 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2105 ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
2106 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
2107 fc_rsp
->scsi_status
);
2110 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
2112 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2113 ibmvfc_free_event(evt
);
2114 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2119 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2120 * @sdev: scsi device to cancel commands
2121 * @type: type of error recovery being performed
2123 * This sends a cancel to the VIOS for the specified device. This does
2124 * NOT send any abort to the actual device. That must be done separately.
2127 * 0 on success / other on failure
2129 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
2131 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2132 struct scsi_target
*starget
= scsi_target(sdev
);
2133 struct fc_rport
*rport
= starget_to_rport(starget
);
2134 struct ibmvfc_tmf
*tmf
;
2135 struct ibmvfc_event
*evt
, *found_evt
;
2136 union ibmvfc_iu rsp
;
2137 int rsp_rc
= -EBUSY
;
2138 unsigned long flags
;
2142 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2144 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2145 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
2152 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
2153 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
2154 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2158 if (vhost
->state
== IBMVFC_ACTIVE
) {
2159 evt
= ibmvfc_get_event(vhost
);
2160 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
2163 memset(tmf
, 0, sizeof(*tmf
));
2164 tmf
->common
.version
= 1;
2165 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
2166 tmf
->common
.length
= sizeof(*tmf
);
2167 tmf
->scsi_id
= rport
->port_id
;
2168 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
2169 tmf
->flags
= (type
| IBMVFC_TMF_LUA_VALID
);
2170 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
2171 tmf
->my_cancel_key
= (unsigned long)starget
->hostdata
;
2173 evt
->sync_iu
= &rsp
;
2174 init_completion(&evt
->comp
);
2175 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
2178 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2181 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
2185 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
2187 wait_for_completion(&evt
->comp
);
2188 status
= rsp
.mad_common
.status
;
2189 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2190 ibmvfc_free_event(evt
);
2191 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2193 if (status
!= IBMVFC_MAD_SUCCESS
) {
2194 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
2198 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
2203 * ibmvfc_match_target - Match function for specified target
2204 * @evt: ibmvfc event struct
2205 * @device: device to match (starget)
2208 * 1 if event matches starget / 0 if event does not match starget
2210 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
2212 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
2218 * ibmvfc_match_lun - Match function for specified LUN
2219 * @evt: ibmvfc event struct
2220 * @device: device to match (sdev)
2223 * 1 if event matches sdev / 0 if event does not match sdev
2225 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
2227 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
2233 * ibmvfc_wait_for_ops - Wait for ops to complete
2234 * @vhost: ibmvfc host struct
2235 * @device: device to match (starget or sdev)
2236 * @match: match function
2241 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
2242 int (*match
) (struct ibmvfc_event
*, void *))
2244 struct ibmvfc_event
*evt
;
2245 DECLARE_COMPLETION_ONSTACK(comp
);
2247 unsigned long flags
;
2248 signed long timeout
= init_timeout
* HZ
;
2253 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2254 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2255 if (match(evt
, device
)) {
2256 evt
->eh_comp
= &comp
;
2260 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2263 timeout
= wait_for_completion_timeout(&comp
, timeout
);
2267 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2268 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
2269 if (match(evt
, device
)) {
2270 evt
->eh_comp
= NULL
;
2274 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2276 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
2278 return wait
? FAILED
: SUCCESS
;
2288 * ibmvfc_eh_abort_handler - Abort a command
2289 * @cmd: scsi command to abort
2294 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
2296 struct scsi_device
*sdev
= cmd
->device
;
2297 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2298 int cancel_rc
, abort_rc
;
2302 ibmvfc_wait_while_resetting(vhost
);
2303 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2304 abort_rc
= ibmvfc_abort_task_set(sdev
);
2306 if (!cancel_rc
&& !abort_rc
)
2307 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2314 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2315 * @cmd: scsi command struct
2320 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
2322 struct scsi_device
*sdev
= cmd
->device
;
2323 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2324 int cancel_rc
, reset_rc
;
2328 ibmvfc_wait_while_resetting(vhost
);
2329 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
2330 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
2332 if (!cancel_rc
&& !reset_rc
)
2333 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2340 * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function
2341 * @sdev: scsi device struct
2342 * @data: return code
2345 static void ibmvfc_dev_cancel_all_abts(struct scsi_device
*sdev
, void *data
)
2347 unsigned long *rc
= data
;
2348 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2352 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2353 * @sdev: scsi device struct
2354 * @data: return code
2357 static void ibmvfc_dev_cancel_all_reset(struct scsi_device
*sdev
, void *data
)
2359 unsigned long *rc
= data
;
2360 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2364 * ibmvfc_dev_abort_all - Device iterated abort task set function
2365 * @sdev: scsi device struct
2366 * @data: return code
2369 static void ibmvfc_dev_abort_all(struct scsi_device
*sdev
, void *data
)
2371 unsigned long *rc
= data
;
2372 *rc
|= ibmvfc_abort_task_set(sdev
);
2376 * ibmvfc_eh_target_reset_handler - Reset the target
2377 * @cmd: scsi command struct
2382 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2384 struct scsi_device
*sdev
= cmd
->device
;
2385 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2386 struct scsi_target
*starget
= scsi_target(sdev
);
2389 unsigned long cancel_rc
= 0;
2392 ibmvfc_wait_while_resetting(vhost
);
2393 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_reset
);
2394 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2396 if (!cancel_rc
&& !reset_rc
)
2397 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2404 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2405 * @cmd: struct scsi_cmnd having problems
2408 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2411 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2413 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2414 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2415 return rc
? FAILED
: SUCCESS
;
2419 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2420 * @rport: rport struct
2425 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2427 struct scsi_target
*starget
= to_scsi_target(&rport
->dev
);
2428 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2429 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2430 unsigned long cancel_rc
= 0;
2431 unsigned long abort_rc
= 0;
2435 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all_abts
);
2436 starget_for_each_device(starget
, &abort_rc
, ibmvfc_dev_abort_all
);
2438 if (!cancel_rc
&& !abort_rc
)
2439 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2442 ibmvfc_issue_fc_host_lip(shost
);
2446 static const struct {
2447 enum ibmvfc_async_event ae
;
2450 { IBMVFC_AE_ELS_PLOGI
, "PLOGI" },
2451 { IBMVFC_AE_ELS_LOGO
, "LOGO" },
2452 { IBMVFC_AE_ELS_PRLO
, "PRLO" },
2453 { IBMVFC_AE_SCN_NPORT
, "N-Port SCN" },
2454 { IBMVFC_AE_SCN_GROUP
, "Group SCN" },
2455 { IBMVFC_AE_SCN_DOMAIN
, "Domain SCN" },
2456 { IBMVFC_AE_SCN_FABRIC
, "Fabric SCN" },
2457 { IBMVFC_AE_LINK_UP
, "Link Up" },
2458 { IBMVFC_AE_LINK_DOWN
, "Link Down" },
2459 { IBMVFC_AE_LINK_DEAD
, "Link Dead" },
2460 { IBMVFC_AE_HALT
, "Halt" },
2461 { IBMVFC_AE_RESUME
, "Resume" },
2462 { IBMVFC_AE_ADAPTER_FAILED
, "Adapter Failed" },
2465 static const char *unknown_ae
= "Unknown async";
2468 * ibmvfc_get_ae_desc - Get text description for async event
2472 static const char *ibmvfc_get_ae_desc(u64 ae
)
2476 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2477 if (ae_desc
[i
].ae
== ae
)
2478 return ae_desc
[i
].desc
;
2484 * ibmvfc_handle_async - Handle an async event from the adapter
2485 * @crq: crq to process
2486 * @vhost: ibmvfc host struct
2489 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2490 struct ibmvfc_host
*vhost
)
2492 const char *desc
= ibmvfc_get_ae_desc(crq
->event
);
2493 struct ibmvfc_target
*tgt
;
2495 ibmvfc_log(vhost
, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2496 " node_name: %llx\n", desc
, crq
->scsi_id
, crq
->wwpn
, crq
->node_name
);
2498 switch (crq
->event
) {
2499 case IBMVFC_AE_RESUME
:
2500 switch (crq
->link_state
) {
2501 case IBMVFC_AE_LS_LINK_DOWN
:
2502 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2504 case IBMVFC_AE_LS_LINK_DEAD
:
2505 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2507 case IBMVFC_AE_LS_LINK_UP
:
2508 case IBMVFC_AE_LS_LINK_BOUNCED
:
2510 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2511 vhost
->delay_init
= 1;
2512 __ibmvfc_reset_host(vhost
);
2517 case IBMVFC_AE_LINK_UP
:
2518 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2519 vhost
->delay_init
= 1;
2520 __ibmvfc_reset_host(vhost
);
2522 case IBMVFC_AE_SCN_FABRIC
:
2523 case IBMVFC_AE_SCN_DOMAIN
:
2524 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2525 vhost
->delay_init
= 1;
2526 __ibmvfc_reset_host(vhost
);
2528 case IBMVFC_AE_SCN_NPORT
:
2529 case IBMVFC_AE_SCN_GROUP
:
2530 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2531 ibmvfc_reinit_host(vhost
);
2533 case IBMVFC_AE_ELS_LOGO
:
2534 case IBMVFC_AE_ELS_PRLO
:
2535 case IBMVFC_AE_ELS_PLOGI
:
2536 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
2537 if (!crq
->scsi_id
&& !crq
->wwpn
&& !crq
->node_name
)
2539 if (crq
->scsi_id
&& tgt
->scsi_id
!= crq
->scsi_id
)
2541 if (crq
->wwpn
&& tgt
->ids
.port_name
!= crq
->wwpn
)
2543 if (crq
->node_name
&& tgt
->ids
.node_name
!= crq
->node_name
)
2545 if (tgt
->need_login
&& crq
->event
== IBMVFC_AE_ELS_LOGO
)
2547 if (!tgt
->need_login
|| crq
->event
== IBMVFC_AE_ELS_PLOGI
) {
2548 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2549 ibmvfc_reinit_host(vhost
);
2553 case IBMVFC_AE_LINK_DOWN
:
2554 case IBMVFC_AE_ADAPTER_FAILED
:
2555 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2557 case IBMVFC_AE_LINK_DEAD
:
2558 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2560 case IBMVFC_AE_HALT
:
2561 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2564 dev_err(vhost
->dev
, "Unknown async event received: %lld\n", crq
->event
);
2570 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2571 * @crq: Command/Response queue
2572 * @vhost: ibmvfc host struct
2575 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2578 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)crq
->ioba
;
2580 switch (crq
->valid
) {
2581 case IBMVFC_CRQ_INIT_RSP
:
2582 switch (crq
->format
) {
2583 case IBMVFC_CRQ_INIT
:
2584 dev_info(vhost
->dev
, "Partner initialized\n");
2585 /* Send back a response */
2586 rc
= ibmvfc_send_crq_init_complete(vhost
);
2588 ibmvfc_init_host(vhost
);
2590 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2592 case IBMVFC_CRQ_INIT_COMPLETE
:
2593 dev_info(vhost
->dev
, "Partner initialization complete\n");
2594 ibmvfc_init_host(vhost
);
2597 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2600 case IBMVFC_CRQ_XPORT_EVENT
:
2601 vhost
->state
= IBMVFC_NO_CRQ
;
2602 vhost
->logged_in
= 0;
2603 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2604 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2605 /* We need to re-setup the interpartition connection */
2606 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2607 vhost
->client_migrated
= 1;
2608 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2609 if ((rc
= ibmvfc_reenable_crq_queue(vhost
)) ||
2610 (rc
= ibmvfc_send_crq_init(vhost
))) {
2611 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2612 dev_err(vhost
->dev
, "Error after enable (rc=%ld)\n", rc
);
2614 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2616 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2618 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2619 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
2620 (rc
= ibmvfc_send_crq_init(vhost
))) {
2621 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2622 dev_err(vhost
->dev
, "Error after reset (rc=%ld)\n", rc
);
2624 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2627 case IBMVFC_CRQ_CMD_RSP
:
2630 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2634 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2637 /* The only kind of payload CRQs we should get are responses to
2638 * things we send. Make sure this response is to something we
2641 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2642 dev_err(vhost
->dev
, "Returned correlation_token 0x%08llx is invalid!\n",
2647 if (unlikely(atomic_read(&evt
->free
))) {
2648 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08llx!\n",
2653 del_timer(&evt
->timer
);
2654 list_del(&evt
->queue
);
2655 ibmvfc_trc_end(evt
);
2660 * ibmvfc_scan_finished - Check if the device scan is done.
2661 * @shost: scsi host struct
2662 * @time: current elapsed time
2665 * 0 if scan is not done / 1 if scan is done
2667 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2669 unsigned long flags
;
2670 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2673 spin_lock_irqsave(shost
->host_lock
, flags
);
2674 if (time
>= (init_timeout
* HZ
)) {
2675 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2676 "continuing initialization\n", init_timeout
);
2680 if (vhost
->scan_complete
)
2682 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2687 * ibmvfc_slave_alloc - Setup the device's task set value
2688 * @sdev: struct scsi_device device to configure
2690 * Set the device's task set value so that error handling works as
2694 * 0 on success / -ENXIO if device does not exist
2696 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2698 struct Scsi_Host
*shost
= sdev
->host
;
2699 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2700 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2701 unsigned long flags
= 0;
2703 if (!rport
|| fc_remote_port_chkready(rport
))
2706 spin_lock_irqsave(shost
->host_lock
, flags
);
2707 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2708 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2713 * ibmvfc_target_alloc - Setup the target's task set value
2714 * @starget: struct scsi_target
2716 * Set the target's task set value so that error handling works as
2720 * 0 on success / -ENXIO if device does not exist
2722 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2724 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2725 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2726 unsigned long flags
= 0;
2728 spin_lock_irqsave(shost
->host_lock
, flags
);
2729 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2730 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2735 * ibmvfc_slave_configure - Configure the device
2736 * @sdev: struct scsi_device device to configure
2738 * Enable allow_restart for a device if it is a disk. Adjust the
2739 * queue_depth here also.
2744 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2746 struct Scsi_Host
*shost
= sdev
->host
;
2747 struct fc_rport
*rport
= starget_to_rport(sdev
->sdev_target
);
2748 unsigned long flags
= 0;
2750 spin_lock_irqsave(shost
->host_lock
, flags
);
2751 if (sdev
->type
== TYPE_DISK
)
2752 sdev
->allow_restart
= 1;
2754 if (sdev
->tagged_supported
) {
2755 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
2756 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2758 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2760 rport
->dev_loss_tmo
= dev_loss_tmo
;
2761 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2766 * ibmvfc_change_queue_depth - Change the device's queue depth
2767 * @sdev: scsi device struct
2768 * @qdepth: depth to set
2769 * @reason: calling context
2774 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
,
2777 if (reason
!= SCSI_QDEPTH_DEFAULT
)
2780 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2781 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2783 scsi_adjust_queue_depth(sdev
, 0, qdepth
);
2784 return sdev
->queue_depth
;
2788 * ibmvfc_change_queue_type - Change the device's queue type
2789 * @sdev: scsi device struct
2790 * @tag_type: type of tags to use
2793 * actual queue type set
2795 static int ibmvfc_change_queue_type(struct scsi_device
*sdev
, int tag_type
)
2797 if (sdev
->tagged_supported
) {
2798 scsi_set_tag_type(sdev
, tag_type
);
2801 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2803 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2810 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2811 struct device_attribute
*attr
, char *buf
)
2813 struct Scsi_Host
*shost
= class_to_shost(dev
);
2814 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2816 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2817 vhost
->login_buf
->resp
.partition_name
);
2820 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2821 struct device_attribute
*attr
, char *buf
)
2823 struct Scsi_Host
*shost
= class_to_shost(dev
);
2824 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2826 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2827 vhost
->login_buf
->resp
.device_name
);
2830 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2831 struct device_attribute
*attr
, char *buf
)
2833 struct Scsi_Host
*shost
= class_to_shost(dev
);
2834 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2836 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2837 vhost
->login_buf
->resp
.port_loc_code
);
2840 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2841 struct device_attribute
*attr
, char *buf
)
2843 struct Scsi_Host
*shost
= class_to_shost(dev
);
2844 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2846 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2847 vhost
->login_buf
->resp
.drc_name
);
2850 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2851 struct device_attribute
*attr
, char *buf
)
2853 struct Scsi_Host
*shost
= class_to_shost(dev
);
2854 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2855 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2858 static ssize_t
ibmvfc_show_host_capabilities(struct device
*dev
,
2859 struct device_attribute
*attr
, char *buf
)
2861 struct Scsi_Host
*shost
= class_to_shost(dev
);
2862 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2863 return snprintf(buf
, PAGE_SIZE
, "%llx\n", vhost
->login_buf
->resp
.capabilities
);
2867 * ibmvfc_show_log_level - Show the adapter's error logging level
2868 * @dev: class device struct
2872 * number of bytes printed to buffer
2874 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2875 struct device_attribute
*attr
, char *buf
)
2877 struct Scsi_Host
*shost
= class_to_shost(dev
);
2878 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2879 unsigned long flags
= 0;
2882 spin_lock_irqsave(shost
->host_lock
, flags
);
2883 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2884 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2889 * ibmvfc_store_log_level - Change the adapter's error logging level
2890 * @dev: class device struct
2894 * number of bytes printed to buffer
2896 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
2897 struct device_attribute
*attr
,
2898 const char *buf
, size_t count
)
2900 struct Scsi_Host
*shost
= class_to_shost(dev
);
2901 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2902 unsigned long flags
= 0;
2904 spin_lock_irqsave(shost
->host_lock
, flags
);
2905 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
2906 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2910 static DEVICE_ATTR(partition_name
, S_IRUGO
, ibmvfc_show_host_partition_name
, NULL
);
2911 static DEVICE_ATTR(device_name
, S_IRUGO
, ibmvfc_show_host_device_name
, NULL
);
2912 static DEVICE_ATTR(port_loc_code
, S_IRUGO
, ibmvfc_show_host_loc_code
, NULL
);
2913 static DEVICE_ATTR(drc_name
, S_IRUGO
, ibmvfc_show_host_drc_name
, NULL
);
2914 static DEVICE_ATTR(npiv_version
, S_IRUGO
, ibmvfc_show_host_npiv_version
, NULL
);
2915 static DEVICE_ATTR(capabilities
, S_IRUGO
, ibmvfc_show_host_capabilities
, NULL
);
2916 static DEVICE_ATTR(log_level
, S_IRUGO
| S_IWUSR
,
2917 ibmvfc_show_log_level
, ibmvfc_store_log_level
);
2919 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2921 * ibmvfc_read_trace - Dump the adapter trace
2922 * @kobj: kobject struct
2923 * @bin_attr: bin_attribute struct
2926 * @count: buffer size
2929 * number of bytes printed to buffer
2931 static ssize_t
ibmvfc_read_trace(struct kobject
*kobj
,
2932 struct bin_attribute
*bin_attr
,
2933 char *buf
, loff_t off
, size_t count
)
2935 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
2936 struct Scsi_Host
*shost
= class_to_shost(dev
);
2937 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2938 unsigned long flags
= 0;
2939 int size
= IBMVFC_TRACE_SIZE
;
2940 char *src
= (char *)vhost
->trace
;
2944 if (off
+ count
> size
) {
2949 spin_lock_irqsave(shost
->host_lock
, flags
);
2950 memcpy(buf
, &src
[off
], count
);
2951 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2955 static struct bin_attribute ibmvfc_trace_attr
= {
2961 .read
= ibmvfc_read_trace
,
2965 static struct device_attribute
*ibmvfc_attrs
[] = {
2966 &dev_attr_partition_name
,
2967 &dev_attr_device_name
,
2968 &dev_attr_port_loc_code
,
2970 &dev_attr_npiv_version
,
2971 &dev_attr_capabilities
,
2972 &dev_attr_log_level
,
2976 static struct scsi_host_template driver_template
= {
2977 .module
= THIS_MODULE
,
2978 .name
= "IBM POWER Virtual FC Adapter",
2979 .proc_name
= IBMVFC_NAME
,
2980 .queuecommand
= ibmvfc_queuecommand
,
2981 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
2982 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
2983 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
2984 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
2985 .slave_alloc
= ibmvfc_slave_alloc
,
2986 .slave_configure
= ibmvfc_slave_configure
,
2987 .target_alloc
= ibmvfc_target_alloc
,
2988 .scan_finished
= ibmvfc_scan_finished
,
2989 .change_queue_depth
= ibmvfc_change_queue_depth
,
2990 .change_queue_type
= ibmvfc_change_queue_type
,
2992 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
2994 .sg_tablesize
= SG_ALL
,
2995 .max_sectors
= IBMVFC_MAX_SECTORS
,
2996 .use_clustering
= ENABLE_CLUSTERING
,
2997 .shost_attrs
= ibmvfc_attrs
,
3001 * ibmvfc_next_async_crq - Returns the next entry in async queue
3002 * @vhost: ibmvfc host struct
3005 * Pointer to next entry in queue / NULL if empty
3007 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
3009 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
3010 struct ibmvfc_async_crq
*crq
;
3012 crq
= &async_crq
->msgs
[async_crq
->cur
];
3013 if (crq
->valid
& 0x80) {
3014 if (++async_crq
->cur
== async_crq
->size
)
3023 * ibmvfc_next_crq - Returns the next entry in message queue
3024 * @vhost: ibmvfc host struct
3027 * Pointer to next entry in queue / NULL if empty
3029 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
3031 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
3032 struct ibmvfc_crq
*crq
;
3034 crq
= &queue
->msgs
[queue
->cur
];
3035 if (crq
->valid
& 0x80) {
3036 if (++queue
->cur
== queue
->size
)
3045 * ibmvfc_interrupt - Interrupt handler
3046 * @irq: number of irq to handle, not used
3047 * @dev_instance: ibmvfc_host that received interrupt
3052 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
3054 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
3055 unsigned long flags
;
3057 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3058 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
3059 tasklet_schedule(&vhost
->tasklet
);
3060 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3065 * ibmvfc_tasklet - Interrupt handler tasklet
3066 * @data: ibmvfc host struct
3071 static void ibmvfc_tasklet(void *data
)
3073 struct ibmvfc_host
*vhost
= data
;
3074 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
3075 struct ibmvfc_crq
*crq
;
3076 struct ibmvfc_async_crq
*async
;
3077 unsigned long flags
;
3080 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3082 /* Pull all the valid messages off the async CRQ */
3083 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3084 ibmvfc_handle_async(async
, vhost
);
3088 /* Pull all the valid messages off the CRQ */
3089 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3090 ibmvfc_handle_crq(crq
, vhost
);
3094 vio_enable_interrupts(vdev
);
3095 if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
3096 vio_disable_interrupts(vdev
);
3097 ibmvfc_handle_async(async
, vhost
);
3099 } else if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
3100 vio_disable_interrupts(vdev
);
3101 ibmvfc_handle_crq(crq
, vhost
);
3107 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3111 * ibmvfc_init_tgt - Set the next init job step for the target
3112 * @tgt: ibmvfc target struct
3113 * @job_step: job step to perform
3116 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
3117 void (*job_step
) (struct ibmvfc_target
*))
3119 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
3120 tgt
->job_step
= job_step
;
3121 wake_up(&tgt
->vhost
->work_wait_q
);
3125 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3126 * @tgt: ibmvfc target struct
3127 * @job_step: initialization job step
3129 * Returns: 1 if step will be retried / 0 if not
3132 static int ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
3133 void (*job_step
) (struct ibmvfc_target
*))
3135 if (++tgt
->init_retries
> IBMVFC_MAX_TGT_INIT_RETRIES
) {
3136 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3137 wake_up(&tgt
->vhost
->work_wait_q
);
3140 ibmvfc_init_tgt(tgt
, job_step
);
3144 /* Defined in FC-LS */
3145 static const struct {
3162 * ibmvfc_get_prli_rsp - Find PRLI response index
3163 * @flags: PRLI response flags
3166 static int ibmvfc_get_prli_rsp(u16 flags
)
3169 int code
= (flags
& 0x0f00) >> 8;
3171 for (i
= 0; i
< ARRAY_SIZE(prli_rsp
); i
++)
3172 if (prli_rsp
[i
].code
== code
)
3179 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3180 * @evt: ibmvfc event struct
3183 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
3185 struct ibmvfc_target
*tgt
= evt
->tgt
;
3186 struct ibmvfc_host
*vhost
= evt
->vhost
;
3187 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
3188 struct ibmvfc_prli_svc_parms
*parms
= &rsp
->parms
;
3189 u32 status
= rsp
->common
.status
;
3190 int index
, level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3192 vhost
->discovery_threads
--;
3193 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3195 case IBMVFC_MAD_SUCCESS
:
3196 tgt_dbg(tgt
, "Process Login succeeded: %X %02X %04X\n",
3197 parms
->type
, parms
->flags
, parms
->service_parms
);
3199 if (parms
->type
== IBMVFC_SCSI_FCP_TYPE
) {
3200 index
= ibmvfc_get_prli_rsp(parms
->flags
);
3201 if (prli_rsp
[index
].logged_in
) {
3202 if (parms
->flags
& IBMVFC_PRLI_EST_IMG_PAIR
) {
3203 tgt
->need_login
= 0;
3205 if (parms
->service_parms
& IBMVFC_PRLI_TARGET_FUNC
)
3206 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_TARGET
;
3207 if (parms
->service_parms
& IBMVFC_PRLI_INITIATOR_FUNC
)
3208 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_INITIATOR
;
3211 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3212 } else if (prli_rsp
[index
].retry
)
3213 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3215 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3217 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3219 case IBMVFC_MAD_DRIVER_FAILED
:
3221 case IBMVFC_MAD_CRQ_ERROR
:
3222 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3224 case IBMVFC_MAD_FAILED
:
3226 if ((rsp
->status
& IBMVFC_VIOS_FAILURE
) && rsp
->error
== IBMVFC_PLOGI_REQUIRED
)
3227 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3228 else if (tgt
->logo_rcvd
)
3229 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3230 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3231 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
3233 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3235 tgt_log(tgt
, level
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3236 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
),
3237 rsp
->status
, rsp
->error
, status
);
3241 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3242 ibmvfc_free_event(evt
);
3243 wake_up(&vhost
->work_wait_q
);
3247 * ibmvfc_tgt_send_prli - Send a process login
3248 * @tgt: ibmvfc target struct
3251 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
3253 struct ibmvfc_process_login
*prli
;
3254 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3255 struct ibmvfc_event
*evt
;
3257 if (vhost
->discovery_threads
>= disc_threads
)
3260 kref_get(&tgt
->kref
);
3261 evt
= ibmvfc_get_event(vhost
);
3262 vhost
->discovery_threads
++;
3263 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
3265 prli
= &evt
->iu
.prli
;
3266 memset(prli
, 0, sizeof(*prli
));
3267 prli
->common
.version
= 1;
3268 prli
->common
.opcode
= IBMVFC_PROCESS_LOGIN
;
3269 prli
->common
.length
= sizeof(*prli
);
3270 prli
->scsi_id
= tgt
->scsi_id
;
3272 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
3273 prli
->parms
.flags
= IBMVFC_PRLI_EST_IMG_PAIR
;
3274 prli
->parms
.service_parms
= IBMVFC_PRLI_INITIATOR_FUNC
;
3276 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3277 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3278 vhost
->discovery_threads
--;
3279 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3280 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3282 tgt_dbg(tgt
, "Sent process login\n");
3286 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3287 * @evt: ibmvfc event struct
3290 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
3292 struct ibmvfc_target
*tgt
= evt
->tgt
;
3293 struct ibmvfc_host
*vhost
= evt
->vhost
;
3294 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
3295 u32 status
= rsp
->common
.status
;
3296 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3298 vhost
->discovery_threads
--;
3299 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3301 case IBMVFC_MAD_SUCCESS
:
3302 tgt_dbg(tgt
, "Port Login succeeded\n");
3303 if (tgt
->ids
.port_name
&&
3304 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
3306 tgt_dbg(tgt
, "Port re-init required\n");
3309 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
3310 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
3311 tgt
->ids
.port_id
= tgt
->scsi_id
;
3312 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
3313 sizeof(tgt
->service_parms
));
3314 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
3315 sizeof(tgt
->service_parms_change
));
3316 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
3318 case IBMVFC_MAD_DRIVER_FAILED
:
3320 case IBMVFC_MAD_CRQ_ERROR
:
3321 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3323 case IBMVFC_MAD_FAILED
:
3325 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3326 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3328 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3330 tgt_log(tgt
, level
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3331 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3332 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3333 ibmvfc_get_ls_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3337 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3338 ibmvfc_free_event(evt
);
3339 wake_up(&vhost
->work_wait_q
);
3343 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3344 * @tgt: ibmvfc target struct
3347 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
3349 struct ibmvfc_port_login
*plogi
;
3350 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3351 struct ibmvfc_event
*evt
;
3353 if (vhost
->discovery_threads
>= disc_threads
)
3356 kref_get(&tgt
->kref
);
3358 evt
= ibmvfc_get_event(vhost
);
3359 vhost
->discovery_threads
++;
3360 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3361 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
3363 plogi
= &evt
->iu
.plogi
;
3364 memset(plogi
, 0, sizeof(*plogi
));
3365 plogi
->common
.version
= 1;
3366 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
3367 plogi
->common
.length
= sizeof(*plogi
);
3368 plogi
->scsi_id
= tgt
->scsi_id
;
3370 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3371 vhost
->discovery_threads
--;
3372 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3373 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3375 tgt_dbg(tgt
, "Sent port login\n");
3379 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3380 * @evt: ibmvfc event struct
3383 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
3385 struct ibmvfc_target
*tgt
= evt
->tgt
;
3386 struct ibmvfc_host
*vhost
= evt
->vhost
;
3387 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
3388 u32 status
= rsp
->common
.status
;
3390 vhost
->discovery_threads
--;
3391 ibmvfc_free_event(evt
);
3392 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3395 case IBMVFC_MAD_SUCCESS
:
3396 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
3398 case IBMVFC_MAD_DRIVER_FAILED
:
3399 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3400 wake_up(&vhost
->work_wait_q
);
3402 case IBMVFC_MAD_FAILED
:
3404 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
3408 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
3409 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
3410 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
3411 tgt
->scsi_id
!= tgt
->new_scsi_id
)
3412 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3413 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3414 wake_up(&vhost
->work_wait_q
);
3418 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3419 * @tgt: ibmvfc target struct
3422 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
3424 struct ibmvfc_implicit_logout
*mad
;
3425 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3426 struct ibmvfc_event
*evt
;
3428 if (vhost
->discovery_threads
>= disc_threads
)
3431 kref_get(&tgt
->kref
);
3432 evt
= ibmvfc_get_event(vhost
);
3433 vhost
->discovery_threads
++;
3434 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
3436 mad
= &evt
->iu
.implicit_logout
;
3437 memset(mad
, 0, sizeof(*mad
));
3438 mad
->common
.version
= 1;
3439 mad
->common
.opcode
= IBMVFC_IMPLICIT_LOGOUT
;
3440 mad
->common
.length
= sizeof(*mad
);
3441 mad
->old_scsi_id
= tgt
->scsi_id
;
3443 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3444 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3445 vhost
->discovery_threads
--;
3446 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3447 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3449 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3453 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3454 * @mad: ibmvfc passthru mad struct
3455 * @tgt: ibmvfc target struct
3458 * 1 if PLOGI needed / 0 if PLOGI not needed
3460 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3461 struct ibmvfc_target
*tgt
)
3463 if (memcmp(&mad
->fc_iu
.response
[2], &tgt
->ids
.port_name
,
3464 sizeof(tgt
->ids
.port_name
)))
3466 if (memcmp(&mad
->fc_iu
.response
[4], &tgt
->ids
.node_name
,
3467 sizeof(tgt
->ids
.node_name
)))
3469 if (mad
->fc_iu
.response
[6] != tgt
->scsi_id
)
3475 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3476 * @evt: ibmvfc event struct
3479 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3481 struct ibmvfc_target
*tgt
= evt
->tgt
;
3482 struct ibmvfc_host
*vhost
= evt
->vhost
;
3483 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3484 u32 status
= mad
->common
.status
;
3485 u8 fc_reason
, fc_explain
;
3487 vhost
->discovery_threads
--;
3488 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3489 del_timer(&tgt
->timer
);
3492 case IBMVFC_MAD_SUCCESS
:
3493 tgt_dbg(tgt
, "ADISC succeeded\n");
3494 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3495 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3497 case IBMVFC_MAD_DRIVER_FAILED
:
3499 case IBMVFC_MAD_FAILED
:
3501 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3502 fc_reason
= (mad
->fc_iu
.response
[1] & 0x00ff0000) >> 16;
3503 fc_explain
= (mad
->fc_iu
.response
[1] & 0x0000ff00) >> 8;
3504 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3505 ibmvfc_get_cmd_error(mad
->iu
.status
, mad
->iu
.error
),
3506 mad
->iu
.status
, mad
->iu
.error
,
3507 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3508 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3512 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3513 ibmvfc_free_event(evt
);
3514 wake_up(&vhost
->work_wait_q
);
3518 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3519 * @evt: ibmvfc event struct
3522 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3524 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3526 memset(mad
, 0, sizeof(*mad
));
3527 mad
->common
.version
= 1;
3528 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
3529 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
3530 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
3531 offsetof(struct ibmvfc_passthru_mad
, iu
);
3532 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
3533 mad
->iu
.cmd_len
= sizeof(mad
->fc_iu
.payload
);
3534 mad
->iu
.rsp_len
= sizeof(mad
->fc_iu
.response
);
3535 mad
->iu
.cmd
.va
= (u64
)evt
->crq
.ioba
+
3536 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3537 offsetof(struct ibmvfc_passthru_fc_iu
, payload
);
3538 mad
->iu
.cmd
.len
= sizeof(mad
->fc_iu
.payload
);
3539 mad
->iu
.rsp
.va
= (u64
)evt
->crq
.ioba
+
3540 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3541 offsetof(struct ibmvfc_passthru_fc_iu
, response
);
3542 mad
->iu
.rsp
.len
= sizeof(mad
->fc_iu
.response
);
3546 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3547 * @evt: ibmvfc event struct
3549 * Just cleanup this event struct. Everything else is handled by
3550 * the ADISC completion handler. If the ADISC never actually comes
3551 * back, we still have the timer running on the ADISC event struct
3552 * which will fire and cause the CRQ to get reset.
3555 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event
*evt
)
3557 struct ibmvfc_host
*vhost
= evt
->vhost
;
3558 struct ibmvfc_target
*tgt
= evt
->tgt
;
3560 tgt_dbg(tgt
, "ADISC cancel complete\n");
3561 vhost
->abort_threads
--;
3562 ibmvfc_free_event(evt
);
3563 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3564 wake_up(&vhost
->work_wait_q
);
3568 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3569 * @tgt: ibmvfc target struct
3571 * If an ADISC times out, send a cancel. If the cancel times
3572 * out, reset the CRQ. When the ADISC comes back as cancelled,
3573 * log back into the target.
3575 static void ibmvfc_adisc_timeout(struct ibmvfc_target
*tgt
)
3577 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3578 struct ibmvfc_event
*evt
;
3579 struct ibmvfc_tmf
*tmf
;
3580 unsigned long flags
;
3583 tgt_dbg(tgt
, "ADISC timeout\n");
3584 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3585 if (vhost
->abort_threads
>= disc_threads
||
3586 tgt
->action
!= IBMVFC_TGT_ACTION_INIT_WAIT
||
3587 vhost
->state
!= IBMVFC_INITIALIZING
||
3588 vhost
->action
!= IBMVFC_HOST_ACTION_QUERY_TGTS
) {
3589 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3593 vhost
->abort_threads
++;
3594 kref_get(&tgt
->kref
);
3595 evt
= ibmvfc_get_event(vhost
);
3596 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_cancel_done
, IBMVFC_MAD_FORMAT
);
3600 memset(tmf
, 0, sizeof(*tmf
));
3601 tmf
->common
.version
= 1;
3602 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
3603 tmf
->common
.length
= sizeof(*tmf
);
3604 tmf
->scsi_id
= tgt
->scsi_id
;
3605 tmf
->cancel_key
= tgt
->cancel_key
;
3607 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
3610 tgt_err(tgt
, "Failed to send cancel event for ADISC. rc=%d\n", rc
);
3611 vhost
->abort_threads
--;
3612 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3613 __ibmvfc_reset_host(vhost
);
3615 tgt_dbg(tgt
, "Attempting to cancel ADISC\n");
3616 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3620 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3621 * @tgt: ibmvfc target struct
3623 * When sending an ADISC we end up with two timers running. The
3624 * first timer is the timer in the ibmvfc target struct. If this
3625 * fires, we send a cancel to the target. The second timer is the
3626 * timer on the ibmvfc event for the ADISC, which is longer. If that
3627 * fires, it means the ADISC timed out and our attempt to cancel it
3628 * also failed, so we need to reset the CRQ.
3630 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3632 struct ibmvfc_passthru_mad
*mad
;
3633 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3634 struct ibmvfc_event
*evt
;
3636 if (vhost
->discovery_threads
>= disc_threads
)
3639 kref_get(&tgt
->kref
);
3640 evt
= ibmvfc_get_event(vhost
);
3641 vhost
->discovery_threads
++;
3642 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3645 ibmvfc_init_passthru(evt
);
3646 mad
= &evt
->iu
.passthru
;
3647 mad
->iu
.flags
= IBMVFC_FC_ELS
;
3648 mad
->iu
.scsi_id
= tgt
->scsi_id
;
3649 mad
->iu
.cancel_key
= tgt
->cancel_key
;
3651 mad
->fc_iu
.payload
[0] = IBMVFC_ADISC
;
3652 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3653 sizeof(vhost
->login_buf
->resp
.port_name
));
3654 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3655 sizeof(vhost
->login_buf
->resp
.node_name
));
3656 mad
->fc_iu
.payload
[6] = vhost
->login_buf
->resp
.scsi_id
& 0x00ffffff;
3658 if (timer_pending(&tgt
->timer
))
3659 mod_timer(&tgt
->timer
, jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
));
3661 tgt
->timer
.data
= (unsigned long) tgt
;
3662 tgt
->timer
.expires
= jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
);
3663 tgt
->timer
.function
= (void (*)(unsigned long))ibmvfc_adisc_timeout
;
3664 add_timer(&tgt
->timer
);
3667 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3668 if (ibmvfc_send_event(evt
, vhost
, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT
)) {
3669 vhost
->discovery_threads
--;
3670 del_timer(&tgt
->timer
);
3671 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3672 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3674 tgt_dbg(tgt
, "Sent ADISC\n");
3678 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3679 * @evt: ibmvfc event struct
3682 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3684 struct ibmvfc_target
*tgt
= evt
->tgt
;
3685 struct ibmvfc_host
*vhost
= evt
->vhost
;
3686 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3687 u32 status
= rsp
->common
.status
;
3688 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3690 vhost
->discovery_threads
--;
3691 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3693 case IBMVFC_MAD_SUCCESS
:
3694 tgt_dbg(tgt
, "Query Target succeeded\n");
3695 tgt
->new_scsi_id
= rsp
->scsi_id
;
3696 if (rsp
->scsi_id
!= tgt
->scsi_id
)
3697 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3699 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3701 case IBMVFC_MAD_DRIVER_FAILED
:
3703 case IBMVFC_MAD_CRQ_ERROR
:
3704 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3706 case IBMVFC_MAD_FAILED
:
3708 if ((rsp
->status
& IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3709 rsp
->error
== IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3710 rsp
->fc_explain
== IBMVFC_PORT_NAME_NOT_REG
)
3711 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3712 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3713 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3715 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3717 tgt_log(tgt
, level
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3718 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3719 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3720 ibmvfc_get_gs_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3724 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3725 ibmvfc_free_event(evt
);
3726 wake_up(&vhost
->work_wait_q
);
3730 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3731 * @tgt: ibmvfc target struct
3734 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3736 struct ibmvfc_query_tgt
*query_tgt
;
3737 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3738 struct ibmvfc_event
*evt
;
3740 if (vhost
->discovery_threads
>= disc_threads
)
3743 kref_get(&tgt
->kref
);
3744 evt
= ibmvfc_get_event(vhost
);
3745 vhost
->discovery_threads
++;
3747 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3748 query_tgt
= &evt
->iu
.query_tgt
;
3749 memset(query_tgt
, 0, sizeof(*query_tgt
));
3750 query_tgt
->common
.version
= 1;
3751 query_tgt
->common
.opcode
= IBMVFC_QUERY_TARGET
;
3752 query_tgt
->common
.length
= sizeof(*query_tgt
);
3753 query_tgt
->wwpn
= tgt
->ids
.port_name
;
3755 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3756 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3757 vhost
->discovery_threads
--;
3758 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3759 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3761 tgt_dbg(tgt
, "Sent Query Target\n");
3765 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3766 * @vhost: ibmvfc host struct
3767 * @scsi_id: SCSI ID to allocate target for
3770 * 0 on success / other on failure
3772 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3774 struct ibmvfc_target
*tgt
;
3775 unsigned long flags
;
3777 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3778 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3779 if (tgt
->scsi_id
== scsi_id
) {
3780 if (tgt
->need_login
)
3781 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3785 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3787 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_NOIO
);
3789 dev_err(vhost
->dev
, "Target allocation failure for scsi id %08llx\n",
3794 memset(tgt
, 0, sizeof(*tgt
));
3795 tgt
->scsi_id
= scsi_id
;
3796 tgt
->new_scsi_id
= scsi_id
;
3798 tgt
->need_login
= 1;
3799 tgt
->cancel_key
= vhost
->task_set
++;
3800 init_timer(&tgt
->timer
);
3801 kref_init(&tgt
->kref
);
3802 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3803 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3804 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3807 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3812 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3813 * @vhost: ibmvfc host struct
3816 * 0 on success / other on failure
3818 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3822 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3823 rc
= ibmvfc_alloc_target(vhost
,
3824 vhost
->disc_buf
->scsi_id
[i
] & IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3830 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3831 * @evt: ibmvfc event struct
3834 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3836 struct ibmvfc_host
*vhost
= evt
->vhost
;
3837 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3838 u32 mad_status
= rsp
->common
.status
;
3839 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3841 switch (mad_status
) {
3842 case IBMVFC_MAD_SUCCESS
:
3843 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3844 vhost
->num_targets
= rsp
->num_written
;
3845 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3847 case IBMVFC_MAD_FAILED
:
3848 level
+= ibmvfc_retry_host_init(vhost
);
3849 ibmvfc_log(vhost
, level
, "Discover Targets failed: %s (%x:%x)\n",
3850 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3852 case IBMVFC_MAD_DRIVER_FAILED
:
3855 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3856 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3860 ibmvfc_free_event(evt
);
3861 wake_up(&vhost
->work_wait_q
);
3865 * ibmvfc_discover_targets - Send Discover Targets MAD
3866 * @vhost: ibmvfc host struct
3869 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3871 struct ibmvfc_discover_targets
*mad
;
3872 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3874 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3875 mad
= &evt
->iu
.discover_targets
;
3876 memset(mad
, 0, sizeof(*mad
));
3877 mad
->common
.version
= 1;
3878 mad
->common
.opcode
= IBMVFC_DISC_TARGETS
;
3879 mad
->common
.length
= sizeof(*mad
);
3880 mad
->bufflen
= vhost
->disc_buf_sz
;
3881 mad
->buffer
.va
= vhost
->disc_buf_dma
;
3882 mad
->buffer
.len
= vhost
->disc_buf_sz
;
3883 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3885 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3886 ibmvfc_dbg(vhost
, "Sent discover targets\n");
3888 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3892 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3893 * @evt: ibmvfc event struct
3896 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
3898 struct ibmvfc_host
*vhost
= evt
->vhost
;
3899 u32 mad_status
= evt
->xfer_iu
->npiv_login
.common
.status
;
3900 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
3901 unsigned int npiv_max_sectors
;
3902 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3904 switch (mad_status
) {
3905 case IBMVFC_MAD_SUCCESS
:
3906 ibmvfc_free_event(evt
);
3908 case IBMVFC_MAD_FAILED
:
3909 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3910 level
+= ibmvfc_retry_host_init(vhost
);
3912 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3913 ibmvfc_log(vhost
, level
, "NPIV Login failed: %s (%x:%x)\n",
3914 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3915 ibmvfc_free_event(evt
);
3917 case IBMVFC_MAD_CRQ_ERROR
:
3918 ibmvfc_retry_host_init(vhost
);
3919 case IBMVFC_MAD_DRIVER_FAILED
:
3920 ibmvfc_free_event(evt
);
3923 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
3924 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3925 ibmvfc_free_event(evt
);
3929 vhost
->client_migrated
= 0;
3931 if (!(rsp
->flags
& IBMVFC_NATIVE_FC
)) {
3932 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
3934 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3935 wake_up(&vhost
->work_wait_q
);
3939 if (rsp
->max_cmds
<= IBMVFC_NUM_INTERNAL_REQ
) {
3940 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
3942 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3943 wake_up(&vhost
->work_wait_q
);
3947 vhost
->logged_in
= 1;
3948 npiv_max_sectors
= min((uint
)(rsp
->max_dma_len
>> 9), IBMVFC_MAX_SECTORS
);
3949 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
3950 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
3951 rsp
->drc_name
, npiv_max_sectors
);
3953 fc_host_fabric_name(vhost
->host
) = rsp
->node_name
;
3954 fc_host_node_name(vhost
->host
) = rsp
->node_name
;
3955 fc_host_port_name(vhost
->host
) = rsp
->port_name
;
3956 fc_host_port_id(vhost
->host
) = rsp
->scsi_id
;
3957 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
3958 fc_host_supported_classes(vhost
->host
) = 0;
3959 if (rsp
->service_parms
.class1_parms
[0] & 0x80000000)
3960 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
3961 if (rsp
->service_parms
.class2_parms
[0] & 0x80000000)
3962 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
3963 if (rsp
->service_parms
.class3_parms
[0] & 0x80000000)
3964 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
3965 fc_host_maxframe_size(vhost
->host
) =
3966 rsp
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3968 vhost
->host
->can_queue
= rsp
->max_cmds
- IBMVFC_NUM_INTERNAL_REQ
;
3969 vhost
->host
->max_sectors
= npiv_max_sectors
;
3970 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3971 wake_up(&vhost
->work_wait_q
);
3975 * ibmvfc_npiv_login - Sends NPIV login
3976 * @vhost: ibmvfc host struct
3979 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
3981 struct ibmvfc_npiv_login_mad
*mad
;
3982 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3984 ibmvfc_gather_partition_info(vhost
);
3985 ibmvfc_set_login_info(vhost
);
3986 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
3988 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
3989 mad
= &evt
->iu
.npiv_login
;
3990 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
3991 mad
->common
.version
= 1;
3992 mad
->common
.opcode
= IBMVFC_NPIV_LOGIN
;
3993 mad
->common
.length
= sizeof(struct ibmvfc_npiv_login_mad
);
3994 mad
->buffer
.va
= vhost
->login_buf_dma
;
3995 mad
->buffer
.len
= sizeof(*vhost
->login_buf
);
3997 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3999 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4000 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
4002 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4006 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4007 * @vhost: ibmvfc host struct
4010 static void ibmvfc_npiv_logout_done(struct ibmvfc_event
*evt
)
4012 struct ibmvfc_host
*vhost
= evt
->vhost
;
4013 u32 mad_status
= evt
->xfer_iu
->npiv_logout
.common
.status
;
4015 ibmvfc_free_event(evt
);
4017 switch (mad_status
) {
4018 case IBMVFC_MAD_SUCCESS
:
4019 if (list_empty(&vhost
->sent
) &&
4020 vhost
->action
== IBMVFC_HOST_ACTION_LOGO_WAIT
) {
4021 ibmvfc_init_host(vhost
);
4025 case IBMVFC_MAD_FAILED
:
4026 case IBMVFC_MAD_NOT_SUPPORTED
:
4027 case IBMVFC_MAD_CRQ_ERROR
:
4028 case IBMVFC_MAD_DRIVER_FAILED
:
4030 ibmvfc_dbg(vhost
, "NPIV Logout failed. 0x%X\n", mad_status
);
4034 ibmvfc_hard_reset_host(vhost
);
4038 * ibmvfc_npiv_logout - Issue an NPIV Logout
4039 * @vhost: ibmvfc host struct
4042 static void ibmvfc_npiv_logout(struct ibmvfc_host
*vhost
)
4044 struct ibmvfc_npiv_logout_mad
*mad
;
4045 struct ibmvfc_event
*evt
;
4047 evt
= ibmvfc_get_event(vhost
);
4048 ibmvfc_init_event(evt
, ibmvfc_npiv_logout_done
, IBMVFC_MAD_FORMAT
);
4050 mad
= &evt
->iu
.npiv_logout
;
4051 memset(mad
, 0, sizeof(*mad
));
4052 mad
->common
.version
= 1;
4053 mad
->common
.opcode
= IBMVFC_NPIV_LOGOUT
;
4054 mad
->common
.length
= sizeof(struct ibmvfc_npiv_logout_mad
);
4056 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO_WAIT
);
4058 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
4059 ibmvfc_dbg(vhost
, "Sent NPIV logout\n");
4061 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
4065 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4066 * @vhost: ibmvfc host struct
4069 * 1 if work to do / 0 if not
4071 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
4073 struct ibmvfc_target
*tgt
;
4075 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4076 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
4077 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4085 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4086 * @vhost: ibmvfc host struct
4089 * 1 if work to do / 0 if not
4091 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4093 struct ibmvfc_target
*tgt
;
4095 if (kthread_should_stop())
4097 switch (vhost
->action
) {
4098 case IBMVFC_HOST_ACTION_NONE
:
4099 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4100 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4102 case IBMVFC_HOST_ACTION_TGT_INIT
:
4103 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4104 if (vhost
->discovery_threads
== disc_threads
)
4106 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4107 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
4109 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4110 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
4113 case IBMVFC_HOST_ACTION_LOGO
:
4114 case IBMVFC_HOST_ACTION_INIT
:
4115 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4116 case IBMVFC_HOST_ACTION_TGT_DEL
:
4117 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4118 case IBMVFC_HOST_ACTION_QUERY
:
4127 * ibmvfc_work_to_do - Is there task level work to do?
4128 * @vhost: ibmvfc host struct
4131 * 1 if work to do / 0 if not
4133 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
4135 unsigned long flags
;
4138 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4139 rc
= __ibmvfc_work_to_do(vhost
);
4140 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4145 * ibmvfc_log_ae - Log async events if necessary
4146 * @vhost: ibmvfc host struct
4147 * @events: events to log
4150 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
4152 if (events
& IBMVFC_AE_RSCN
)
4153 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
4154 if ((events
& IBMVFC_AE_LINKDOWN
) &&
4155 vhost
->state
>= IBMVFC_HALTED
)
4156 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
4157 if ((events
& IBMVFC_AE_LINKUP
) &&
4158 vhost
->state
== IBMVFC_INITIALIZING
)
4159 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
4163 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4164 * @tgt: ibmvfc target struct
4167 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
4169 struct ibmvfc_host
*vhost
= tgt
->vhost
;
4170 struct fc_rport
*rport
;
4171 unsigned long flags
;
4173 tgt_dbg(tgt
, "Adding rport\n");
4174 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
4175 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4177 if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4178 tgt_dbg(tgt
, "Deleting rport\n");
4179 list_del(&tgt
->queue
);
4180 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4181 fc_remote_port_delete(rport
);
4182 del_timer_sync(&tgt
->timer
);
4183 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4188 tgt_dbg(tgt
, "rport add succeeded\n");
4190 rport
->maxframe_size
= tgt
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
4191 rport
->supported_classes
= 0;
4192 tgt
->target_id
= rport
->scsi_target_id
;
4193 if (tgt
->service_parms
.class1_parms
[0] & 0x80000000)
4194 rport
->supported_classes
|= FC_COS_CLASS1
;
4195 if (tgt
->service_parms
.class2_parms
[0] & 0x80000000)
4196 rport
->supported_classes
|= FC_COS_CLASS2
;
4197 if (tgt
->service_parms
.class3_parms
[0] & 0x80000000)
4198 rport
->supported_classes
|= FC_COS_CLASS3
;
4200 blk_queue_max_segments(rport
->rqst_q
, 1);
4202 tgt_dbg(tgt
, "rport add failed\n");
4203 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4207 * ibmvfc_do_work - Do task level work
4208 * @vhost: ibmvfc host struct
4211 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
4213 struct ibmvfc_target
*tgt
;
4214 unsigned long flags
;
4215 struct fc_rport
*rport
;
4217 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
4218 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4219 vhost
->events_to_log
= 0;
4220 switch (vhost
->action
) {
4221 case IBMVFC_HOST_ACTION_NONE
:
4222 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
4223 case IBMVFC_HOST_ACTION_INIT_WAIT
:
4225 case IBMVFC_HOST_ACTION_LOGO
:
4226 vhost
->job_step(vhost
);
4228 case IBMVFC_HOST_ACTION_INIT
:
4229 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
4230 if (vhost
->delay_init
) {
4231 vhost
->delay_init
= 0;
4232 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4236 vhost
->job_step(vhost
);
4238 case IBMVFC_HOST_ACTION_QUERY
:
4239 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
4240 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
4241 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
4243 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
4244 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4245 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4251 if (!ibmvfc_dev_init_to_do(vhost
))
4252 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
4254 case IBMVFC_HOST_ACTION_TGT_DEL
:
4255 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
4256 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4257 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
4258 tgt_dbg(tgt
, "Deleting rport\n");
4261 list_del(&tgt
->queue
);
4262 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4264 fc_remote_port_delete(rport
);
4265 del_timer_sync(&tgt
->timer
);
4266 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4271 if (vhost
->state
== IBMVFC_INITIALIZING
) {
4272 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_DEL_FAILED
) {
4273 if (vhost
->reinit
) {
4275 scsi_block_requests(vhost
->host
);
4276 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
4277 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4279 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
4280 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4281 wake_up(&vhost
->init_wait_q
);
4282 schedule_work(&vhost
->rport_add_work_q
);
4283 vhost
->init_retries
= 0;
4284 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4285 scsi_unblock_requests(vhost
->host
);
4290 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
4291 vhost
->job_step
= ibmvfc_discover_targets
;
4294 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4295 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4296 scsi_unblock_requests(vhost
->host
);
4297 wake_up(&vhost
->init_wait_q
);
4301 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4302 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
4303 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4304 ibmvfc_alloc_targets(vhost
);
4305 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4307 case IBMVFC_HOST_ACTION_TGT_INIT
:
4308 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4309 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4315 if (!ibmvfc_dev_init_to_do(vhost
))
4316 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL_FAILED
);
4322 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4326 * ibmvfc_work - Do task level work
4327 * @data: ibmvfc host struct
4332 static int ibmvfc_work(void *data
)
4334 struct ibmvfc_host
*vhost
= data
;
4337 set_user_nice(current
, -20);
4340 rc
= wait_event_interruptible(vhost
->work_wait_q
,
4341 ibmvfc_work_to_do(vhost
));
4345 if (kthread_should_stop())
4348 ibmvfc_do_work(vhost
);
4351 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
4356 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4357 * @vhost: ibmvfc host struct
4359 * Allocates a page for messages, maps it for dma, and registers
4360 * the crq with the hypervisor.
4363 * zero on success / other on failure
4365 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
4367 int rc
, retrc
= -ENOMEM
;
4368 struct device
*dev
= vhost
->dev
;
4369 struct vio_dev
*vdev
= to_vio_dev(dev
);
4370 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
4373 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
4378 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
4379 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
4380 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4382 if (dma_mapping_error(dev
, crq
->msg_token
))
4385 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
4386 crq
->msg_token
, PAGE_SIZE
);
4388 if (rc
== H_RESOURCE
)
4389 /* maybe kexecing and resource is busy. try a reset */
4390 retrc
= rc
= ibmvfc_reset_crq(vhost
);
4393 dev_warn(dev
, "Partner adapter not ready\n");
4395 dev_warn(dev
, "Error %d opening adapter\n", rc
);
4396 goto reg_crq_failed
;
4401 tasklet_init(&vhost
->tasklet
, (void *)ibmvfc_tasklet
, (unsigned long)vhost
);
4403 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
4404 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
4405 goto req_irq_failed
;
4408 if ((rc
= vio_enable_interrupts(vdev
))) {
4409 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
4410 goto req_irq_failed
;
4418 tasklet_kill(&vhost
->tasklet
);
4420 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
4421 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
4423 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4425 free_page((unsigned long)crq
->msgs
);
4430 * ibmvfc_free_mem - Free memory for vhost
4431 * @vhost: ibmvfc host struct
4436 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
4438 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4441 mempool_destroy(vhost
->tgt_pool
);
4442 kfree(vhost
->trace
);
4443 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4444 vhost
->disc_buf_dma
);
4445 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
4446 vhost
->login_buf
, vhost
->login_buf_dma
);
4447 dma_pool_destroy(vhost
->sg_pool
);
4448 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
4449 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4450 free_page((unsigned long)async_q
->msgs
);
4455 * ibmvfc_alloc_mem - Allocate memory for vhost
4456 * @vhost: ibmvfc host struct
4459 * 0 on success / non-zero on failure
4461 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
4463 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4464 struct device
*dev
= vhost
->dev
;
4467 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
4468 if (!async_q
->msgs
) {
4469 dev_err(dev
, "Couldn't allocate async queue.\n");
4473 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
4474 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
4475 async_q
->size
* sizeof(*async_q
->msgs
),
4478 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
4479 dev_err(dev
, "Failed to map async queue\n");
4480 goto free_async_crq
;
4483 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
4484 SG_ALL
* sizeof(struct srp_direct_buf
),
4485 sizeof(struct srp_direct_buf
), 0);
4487 if (!vhost
->sg_pool
) {
4488 dev_err(dev
, "Failed to allocate sg pool\n");
4489 goto unmap_async_crq
;
4492 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
4493 &vhost
->login_buf_dma
, GFP_KERNEL
);
4495 if (!vhost
->login_buf
) {
4496 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
4500 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
4501 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
4502 &vhost
->disc_buf_dma
, GFP_KERNEL
);
4504 if (!vhost
->disc_buf
) {
4505 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
4506 goto free_login_buffer
;
4509 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
4510 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
4513 goto free_disc_buffer
;
4515 vhost
->tgt_pool
= mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
4516 sizeof(struct ibmvfc_target
));
4518 if (!vhost
->tgt_pool
) {
4519 dev_err(dev
, "Couldn't allocate target memory pool\n");
4527 kfree(vhost
->trace
);
4529 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4530 vhost
->disc_buf_dma
);
4532 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
4533 vhost
->login_buf
, vhost
->login_buf_dma
);
4535 dma_pool_destroy(vhost
->sg_pool
);
4537 dma_unmap_single(dev
, async_q
->msg_token
,
4538 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4540 free_page((unsigned long)async_q
->msgs
);
4547 * ibmvfc_rport_add_thread - Worker thread for rport adds
4548 * @work: work struct
4551 static void ibmvfc_rport_add_thread(struct work_struct
*work
)
4553 struct ibmvfc_host
*vhost
= container_of(work
, struct ibmvfc_host
,
4555 struct ibmvfc_target
*tgt
;
4556 struct fc_rport
*rport
;
4557 unsigned long flags
;
4561 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4564 if (vhost
->state
!= IBMVFC_ACTIVE
)
4567 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4568 if (tgt
->add_rport
) {
4571 kref_get(&tgt
->kref
);
4574 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4575 ibmvfc_tgt_add_rport(tgt
);
4576 } else if (get_device(&rport
->dev
)) {
4577 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4578 tgt_dbg(tgt
, "Setting rport roles\n");
4579 fc_remote_port_rolechg(rport
, tgt
->ids
.roles
);
4580 put_device(&rport
->dev
);
4583 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4584 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4590 if (vhost
->state
== IBMVFC_ACTIVE
)
4591 vhost
->scan_complete
= 1;
4592 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4597 * ibmvfc_probe - Adapter hot plug add entry point
4598 * @vdev: vio device struct
4599 * @id: vio device id struct
4602 * 0 on success / non-zero on failure
4604 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
4606 struct ibmvfc_host
*vhost
;
4607 struct Scsi_Host
*shost
;
4608 struct device
*dev
= &vdev
->dev
;
4612 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
4614 dev_err(dev
, "Couldn't allocate host data\n");
4618 shost
->transportt
= ibmvfc_transport_template
;
4619 shost
->can_queue
= max_requests
;
4620 shost
->max_lun
= max_lun
;
4621 shost
->max_id
= max_targets
;
4622 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
4623 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
4624 shost
->unique_id
= shost
->host_no
;
4626 vhost
= shost_priv(shost
);
4627 INIT_LIST_HEAD(&vhost
->sent
);
4628 INIT_LIST_HEAD(&vhost
->free
);
4629 INIT_LIST_HEAD(&vhost
->targets
);
4630 sprintf(vhost
->name
, IBMVFC_NAME
);
4631 vhost
->host
= shost
;
4633 vhost
->partition_number
= -1;
4634 vhost
->log_level
= log_level
;
4635 vhost
->task_set
= 1;
4636 strcpy(vhost
->partition_name
, "UNKNOWN");
4637 init_waitqueue_head(&vhost
->work_wait_q
);
4638 init_waitqueue_head(&vhost
->init_wait_q
);
4639 INIT_WORK(&vhost
->rport_add_work_q
, ibmvfc_rport_add_thread
);
4640 mutex_init(&vhost
->passthru_mutex
);
4642 if ((rc
= ibmvfc_alloc_mem(vhost
)))
4643 goto free_scsi_host
;
4645 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
4648 if (IS_ERR(vhost
->work_thread
)) {
4649 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
4650 PTR_ERR(vhost
->work_thread
));
4654 if ((rc
= ibmvfc_init_crq(vhost
))) {
4655 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
4659 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
4660 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
4664 if ((rc
= scsi_add_host(shost
, dev
)))
4665 goto release_event_pool
;
4667 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
4668 &ibmvfc_trace_attr
))) {
4669 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
4673 if (shost_to_fc_host(shost
)->rqst_q
)
4674 blk_queue_max_segments(shost_to_fc_host(shost
)->rqst_q
, 1);
4675 dev_set_drvdata(dev
, vhost
);
4676 spin_lock(&ibmvfc_driver_lock
);
4677 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4678 spin_unlock(&ibmvfc_driver_lock
);
4680 ibmvfc_send_crq_init(vhost
);
4681 scsi_scan_host(shost
);
4685 scsi_remove_host(shost
);
4687 ibmvfc_free_event_pool(vhost
);
4689 ibmvfc_release_crq_queue(vhost
);
4691 kthread_stop(vhost
->work_thread
);
4693 ibmvfc_free_mem(vhost
);
4695 scsi_host_put(shost
);
4702 * ibmvfc_remove - Adapter hot plug remove entry point
4703 * @vdev: vio device struct
4708 static int ibmvfc_remove(struct vio_dev
*vdev
)
4710 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4711 unsigned long flags
;
4714 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4716 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4717 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4718 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4720 ibmvfc_wait_while_resetting(vhost
);
4721 ibmvfc_release_crq_queue(vhost
);
4722 kthread_stop(vhost
->work_thread
);
4723 fc_remove_host(vhost
->host
);
4724 scsi_remove_host(vhost
->host
);
4726 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4727 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4728 ibmvfc_free_event_pool(vhost
);
4729 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4731 ibmvfc_free_mem(vhost
);
4732 spin_lock(&ibmvfc_driver_lock
);
4733 list_del(&vhost
->queue
);
4734 spin_unlock(&ibmvfc_driver_lock
);
4735 scsi_host_put(vhost
->host
);
4741 * ibmvfc_resume - Resume from suspend
4742 * @dev: device struct
4744 * We may have lost an interrupt across suspend/resume, so kick the
4748 static int ibmvfc_resume(struct device
*dev
)
4750 unsigned long flags
;
4751 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
4752 struct vio_dev
*vdev
= to_vio_dev(dev
);
4754 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4755 vio_disable_interrupts(vdev
);
4756 tasklet_schedule(&vhost
->tasklet
);
4757 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4762 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4763 * @vdev: vio device struct
4766 * Number of bytes the driver will need to DMA map at the same time in
4767 * order to perform well.
4769 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4771 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4772 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4775 static struct vio_device_id ibmvfc_device_table
[] __devinitdata
= {
4776 {"fcp", "IBM,vfc-client"},
4779 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4781 static struct dev_pm_ops ibmvfc_pm_ops
= {
4782 .resume
= ibmvfc_resume
4785 static struct vio_driver ibmvfc_driver
= {
4786 .id_table
= ibmvfc_device_table
,
4787 .probe
= ibmvfc_probe
,
4788 .remove
= ibmvfc_remove
,
4789 .get_desired_dma
= ibmvfc_get_desired_dma
,
4791 .name
= IBMVFC_NAME
,
4792 .owner
= THIS_MODULE
,
4793 .pm
= &ibmvfc_pm_ops
,
4797 static struct fc_function_template ibmvfc_transport_functions
= {
4798 .show_host_fabric_name
= 1,
4799 .show_host_node_name
= 1,
4800 .show_host_port_name
= 1,
4801 .show_host_supported_classes
= 1,
4802 .show_host_port_type
= 1,
4803 .show_host_port_id
= 1,
4804 .show_host_maxframe_size
= 1,
4806 .get_host_port_state
= ibmvfc_get_host_port_state
,
4807 .show_host_port_state
= 1,
4809 .get_host_speed
= ibmvfc_get_host_speed
,
4810 .show_host_speed
= 1,
4812 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4813 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4815 .show_rport_maxframe_size
= 1,
4816 .show_rport_supported_classes
= 1,
4818 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4819 .show_rport_dev_loss_tmo
= 1,
4821 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4822 .show_starget_node_name
= 1,
4824 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4825 .show_starget_port_name
= 1,
4827 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4828 .show_starget_port_id
= 1,
4830 .bsg_request
= ibmvfc_bsg_request
,
4831 .bsg_timeout
= ibmvfc_bsg_timeout
,
4835 * ibmvfc_module_init - Initialize the ibmvfc module
4838 * 0 on success / other on failure
4840 static int __init
ibmvfc_module_init(void)
4844 if (!firmware_has_feature(FW_FEATURE_VIO
))
4847 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
4848 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
4850 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
4851 if (!ibmvfc_transport_template
)
4854 rc
= vio_register_driver(&ibmvfc_driver
);
4856 fc_release_transport(ibmvfc_transport_template
);
4861 * ibmvfc_module_exit - Teardown the ibmvfc module
4866 static void __exit
ibmvfc_module_exit(void)
4868 vio_unregister_driver(&ibmvfc_driver
);
4869 fc_release_transport(ibmvfc_transport_template
);
4872 module_init(ibmvfc_module_init
);
4873 module_exit(ibmvfc_module_exit
);