2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
32 #include <linux/stringify.h>
33 #include <asm/firmware.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_device.h>
40 #include <scsi/scsi_tcq.h>
41 #include <scsi/scsi_transport_fc.h>
44 static unsigned int init_timeout
= IBMVFC_INIT_TIMEOUT
;
45 static unsigned int default_timeout
= IBMVFC_DEFAULT_TIMEOUT
;
46 static unsigned int max_lun
= IBMVFC_MAX_LUN
;
47 static unsigned int max_targets
= IBMVFC_MAX_TARGETS
;
48 static unsigned int max_requests
= IBMVFC_MAX_REQUESTS_DEFAULT
;
49 static unsigned int disc_threads
= IBMVFC_MAX_DISC_THREADS
;
50 static unsigned int dev_loss_tmo
= IBMVFC_DEV_LOSS_TMO
;
51 static unsigned int ibmvfc_debug
= IBMVFC_DEBUG
;
52 static unsigned int log_level
= IBMVFC_DEFAULT_LOG_LEVEL
;
53 static LIST_HEAD(ibmvfc_head
);
54 static DEFINE_SPINLOCK(ibmvfc_driver_lock
);
55 static struct scsi_transport_template
*ibmvfc_transport_template
;
57 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(IBMVFC_DRIVER_VERSION
);
62 module_param_named(init_timeout
, init_timeout
, uint
, S_IRUGO
| S_IWUSR
);
63 MODULE_PARM_DESC(init_timeout
, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT
) "]");
65 module_param_named(default_timeout
, default_timeout
, uint
, S_IRUGO
| S_IWUSR
);
66 MODULE_PARM_DESC(default_timeout
,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT
) "]");
69 module_param_named(max_requests
, max_requests
, uint
, S_IRUGO
);
70 MODULE_PARM_DESC(max_requests
, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT
) "]");
72 module_param_named(max_lun
, max_lun
, uint
, S_IRUGO
);
73 MODULE_PARM_DESC(max_lun
, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN
) "]");
75 module_param_named(max_targets
, max_targets
, uint
, S_IRUGO
);
76 MODULE_PARM_DESC(max_targets
, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS
) "]");
78 module_param_named(disc_threads
, disc_threads
, uint
, S_IRUGO
| S_IWUSR
);
79 MODULE_PARM_DESC(disc_threads
, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS
) "]");
81 module_param_named(debug
, ibmvfc_debug
, uint
, S_IRUGO
| S_IWUSR
);
82 MODULE_PARM_DESC(debug
, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG
) "]");
84 module_param_named(dev_loss_tmo
, dev_loss_tmo
, uint
, S_IRUGO
| S_IWUSR
);
85 MODULE_PARM_DESC(dev_loss_tmo
, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO
) "]");
89 module_param_named(log_level
, log_level
, uint
, 0);
90 MODULE_PARM_DESC(log_level
, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL
) "]");
101 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_ESTABLISH
, DID_ERROR
, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_FAULT
, DID_OK
, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CMD_TIMEOUT
, DID_TIME_OUT
, 1, 1, "command timeout" },
104 { IBMVFC_FABRIC_MAPPED
, IBMVFC_ENETDOWN
, DID_TRANSPORT_DISRUPTED
, 1, 1, "network down" },
105 { IBMVFC_FABRIC_MAPPED
, IBMVFC_HW_FAILURE
, DID_ERROR
, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DOWN_ERR
, DID_REQUEUE
, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_DEAD_ERR
, DID_ERROR
, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED
, IBMVFC_UNABLE_TO_REGISTER
, DID_ERROR
, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_BUSY
, DID_BUS_BUSY
, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_DEAD
, DID_ERROR
, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED
, IBMVFC_CONFIG_ERROR
, DID_ERROR
, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED
, IBMVFC_NAME_SERVER_FAIL
, DID_ERROR
, 1, 1, "name server failure" },
113 { IBMVFC_FABRIC_MAPPED
, IBMVFC_LINK_HALTED
, DID_REQUEUE
, 0, 0, "link halted" },
114 { IBMVFC_FABRIC_MAPPED
, IBMVFC_XPORT_GENERAL
, DID_OK
, 1, 0, "general transport error" },
116 { IBMVFC_VIOS_FAILURE
, IBMVFC_CRQ_FAILURE
, DID_REQUEUE
, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE
, IBMVFC_SW_FAILURE
, DID_ERROR
, 0, 1, "software failure" },
118 { IBMVFC_VIOS_FAILURE
, IBMVFC_INVALID_PARAMETER
, DID_ERROR
, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE
, IBMVFC_MISSING_PARAMETER
, DID_ERROR
, 0, 1, "missing parameter" },
120 { IBMVFC_VIOS_FAILURE
, IBMVFC_HOST_IO_BUS
, DID_ERROR
, 1, 1, "host I/O bus failure" },
121 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED
, DID_ERROR
, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE
, IBMVFC_TRANS_CANCELLED_IMPLICIT
, DID_ERROR
, 0, 1, "transaction cancelled implicit" },
123 { IBMVFC_VIOS_FAILURE
, IBMVFC_INSUFFICIENT_RESOURCE
, DID_REQUEUE
, 1, 1, "insufficient resources" },
124 { IBMVFC_VIOS_FAILURE
, IBMVFC_PLOGI_REQUIRED
, DID_ERROR
, 0, 1, "port login required" },
125 { IBMVFC_VIOS_FAILURE
, IBMVFC_COMMAND_FAILED
, DID_ERROR
, 1, 1, "command failed" },
127 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_ELS_CMD_CODE
, DID_ERROR
, 0, 1, "invalid ELS command code" },
128 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_VERSION
, DID_ERROR
, 0, 1, "invalid version level" },
129 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_ERROR
, DID_ERROR
, 1, 1, "logical error" },
130 { IBMVFC_FC_FAILURE
, IBMVFC_INVALID_CT_IU_SIZE
, DID_ERROR
, 0, 1, "invalid CT_IU size" },
131 { IBMVFC_FC_FAILURE
, IBMVFC_LOGICAL_BUSY
, DID_REQUEUE
, 1, 0, "logical busy" },
132 { IBMVFC_FC_FAILURE
, IBMVFC_PROTOCOL_ERROR
, DID_ERROR
, 1, 1, "protocol error" },
133 { IBMVFC_FC_FAILURE
, IBMVFC_UNABLE_TO_PERFORM_REQ
, DID_ERROR
, 1, 1, "unable to perform request" },
134 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_NOT_SUPPORTED
, DID_ERROR
, 0, 0, "command not supported" },
135 { IBMVFC_FC_FAILURE
, IBMVFC_SERVER_NOT_AVAIL
, DID_ERROR
, 0, 1, "server not available" },
136 { IBMVFC_FC_FAILURE
, IBMVFC_CMD_IN_PROGRESS
, DID_ERROR
, 0, 1, "command already in progress" },
137 { IBMVFC_FC_FAILURE
, IBMVFC_VENDOR_SPECIFIC
, DID_ERROR
, 1, 1, "vendor specific" },
139 { IBMVFC_FC_SCSI_ERROR
, 0, DID_OK
, 1, 0, "SCSI error" },
142 static void ibmvfc_npiv_login(struct ibmvfc_host
*);
143 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*);
144 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*);
145 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*);
147 static const char *unknown_error
= "unknown error";
149 #ifdef CONFIG_SCSI_IBMVFC_TRACE
151 * ibmvfc_trc_start - Log a start trace entry
152 * @evt: ibmvfc event struct
155 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
157 struct ibmvfc_host
*vhost
= evt
->vhost
;
158 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
159 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
160 struct ibmvfc_trace_entry
*entry
;
162 entry
= &vhost
->trace
[vhost
->trace_index
++];
164 entry
->time
= jiffies
;
165 entry
->fmt
= evt
->crq
.format
;
166 entry
->type
= IBMVFC_TRC_START
;
168 switch (entry
->fmt
) {
169 case IBMVFC_CMD_FORMAT
:
170 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
171 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
172 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
173 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
174 entry
->u
.start
.xfer_len
= vfc_cmd
->iu
.xfer_len
;
176 case IBMVFC_MAD_FORMAT
:
177 entry
->op_code
= mad
->opcode
;
185 * ibmvfc_trc_end - Log an end trace entry
186 * @evt: ibmvfc event struct
189 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
191 struct ibmvfc_host
*vhost
= evt
->vhost
;
192 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
193 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
194 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
197 entry
->time
= jiffies
;
198 entry
->fmt
= evt
->crq
.format
;
199 entry
->type
= IBMVFC_TRC_END
;
201 switch (entry
->fmt
) {
202 case IBMVFC_CMD_FORMAT
:
203 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
204 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
205 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
206 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
207 entry
->u
.end
.status
= vfc_cmd
->status
;
208 entry
->u
.end
.error
= vfc_cmd
->error
;
209 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
210 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
211 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
213 case IBMVFC_MAD_FORMAT
:
214 entry
->op_code
= mad
->opcode
;
215 entry
->u
.end
.status
= mad
->status
;
224 #define ibmvfc_trc_start(evt) do { } while (0)
225 #define ibmvfc_trc_end(evt) do { } while (0)
229 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
230 * @status: status / error class
234 * index into cmd_status / -EINVAL on failure
236 static int ibmvfc_get_err_index(u16 status
, u16 error
)
240 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
241 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
242 cmd_status
[i
].error
== error
)
249 * ibmvfc_get_cmd_error - Find the error description for the fcp response
250 * @status: status / error class
254 * error description string
256 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
258 int rc
= ibmvfc_get_err_index(status
, error
);
260 return cmd_status
[rc
].name
;
261 return unknown_error
;
265 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
266 * @vfc_cmd: ibmvfc command struct
269 * SCSI result value to return for completed command
271 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
274 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
275 int fc_rsp_len
= rsp
->fcp_rsp_len
;
277 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
278 ((!fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
279 rsp
->data
.info
.rsp_code
))
280 return DID_ERROR
<< 16;
282 err
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
284 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
285 return rsp
->scsi_status
| (DID_ERROR
<< 16);
289 * ibmvfc_retry_cmd - Determine if error status is retryable
290 * @status: status / error class
294 * 1 if error should be retried / 0 if it should not
296 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
298 int rc
= ibmvfc_get_err_index(status
, error
);
301 return cmd_status
[rc
].retry
;
305 static const char *unknown_fc_explain
= "unknown fc explain";
307 static const struct {
311 { 0x00, "no additional explanation" },
312 { 0x01, "service parameter error - options" },
313 { 0x03, "service parameter error - initiator control" },
314 { 0x05, "service parameter error - recipient control" },
315 { 0x07, "service parameter error - received data field size" },
316 { 0x09, "service parameter error - concurrent seq" },
317 { 0x0B, "service parameter error - credit" },
318 { 0x0D, "invalid N_Port/F_Port_Name" },
319 { 0x0E, "invalid node/Fabric Name" },
320 { 0x0F, "invalid common service parameters" },
321 { 0x11, "invalid association header" },
322 { 0x13, "association header required" },
323 { 0x15, "invalid originator S_ID" },
324 { 0x17, "invalid OX_ID-RX-ID combination" },
325 { 0x19, "command (request) already in progress" },
326 { 0x1E, "N_Port Login requested" },
327 { 0x1F, "Invalid N_Port_ID" },
330 static const struct {
334 { 0x00, "no additional explanation" },
335 { 0x01, "port identifier not registered" },
336 { 0x02, "port name not registered" },
337 { 0x03, "node name not registered" },
338 { 0x04, "class of service not registered" },
339 { 0x06, "initial process associator not registered" },
340 { 0x07, "FC-4 TYPEs not registered" },
341 { 0x08, "symbolic port name not registered" },
342 { 0x09, "symbolic node name not registered" },
343 { 0x0A, "port type not registered" },
344 { 0xF0, "authorization exception" },
345 { 0xF1, "authentication exception" },
346 { 0xF2, "data base full" },
347 { 0xF3, "data base empty" },
348 { 0xF4, "processing request" },
349 { 0xF5, "unable to verify connection" },
350 { 0xF6, "devices not in a common zone" },
354 * ibmvfc_get_ls_explain - Return the FC Explain description text
355 * @status: FC Explain status
360 static const char *ibmvfc_get_ls_explain(u16 status
)
364 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
365 if (ls_explain
[i
].fc_explain
== status
)
366 return ls_explain
[i
].name
;
368 return unknown_fc_explain
;
372 * ibmvfc_get_gs_explain - Return the FC Explain description text
373 * @status: FC Explain status
378 static const char *ibmvfc_get_gs_explain(u16 status
)
382 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
383 if (gs_explain
[i
].fc_explain
== status
)
384 return gs_explain
[i
].name
;
386 return unknown_fc_explain
;
389 static const struct {
390 enum ibmvfc_fc_type fc_type
;
393 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
394 { IBMVFC_PORT_REJECT
, "port reject" },
395 { IBMVFC_LS_REJECT
, "ELS reject" },
396 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
397 { IBMVFC_PORT_BUSY
, "port busy" },
398 { IBMVFC_BASIC_REJECT
, "basic reject" },
401 static const char *unknown_fc_type
= "unknown fc type";
404 * ibmvfc_get_fc_type - Return the FC Type description text
405 * @status: FC Type error status
410 static const char *ibmvfc_get_fc_type(u16 status
)
414 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
415 if (fc_type
[i
].fc_type
== status
)
416 return fc_type
[i
].name
;
418 return unknown_fc_type
;
422 * ibmvfc_set_tgt_action - Set the next init action for the target
423 * @tgt: ibmvfc target struct
424 * @action: action to perform
427 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
428 enum ibmvfc_target_action action
)
430 switch (tgt
->action
) {
431 case IBMVFC_TGT_ACTION_DEL_RPORT
:
434 tgt
->action
= action
;
440 * ibmvfc_set_host_state - Set the state for the host
441 * @vhost: ibmvfc host struct
442 * @state: state to set host to
445 * 0 if state changed / non-zero if not changed
447 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
448 enum ibmvfc_host_state state
)
452 switch (vhost
->state
) {
453 case IBMVFC_HOST_OFFLINE
:
457 vhost
->state
= state
;
465 * ibmvfc_set_host_action - Set the next init action for the host
466 * @vhost: ibmvfc host struct
467 * @action: action to perform
470 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
471 enum ibmvfc_host_action action
)
474 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
475 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
476 vhost
->action
= action
;
478 case IBMVFC_HOST_ACTION_INIT_WAIT
:
479 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
480 vhost
->action
= action
;
482 case IBMVFC_HOST_ACTION_QUERY
:
483 switch (vhost
->action
) {
484 case IBMVFC_HOST_ACTION_INIT_WAIT
:
485 case IBMVFC_HOST_ACTION_NONE
:
486 case IBMVFC_HOST_ACTION_TGT_ADD
:
487 vhost
->action
= action
;
493 case IBMVFC_HOST_ACTION_TGT_INIT
:
494 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
495 vhost
->action
= action
;
497 case IBMVFC_HOST_ACTION_INIT
:
498 case IBMVFC_HOST_ACTION_TGT_DEL
:
499 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
500 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
501 case IBMVFC_HOST_ACTION_TGT_ADD
:
502 case IBMVFC_HOST_ACTION_NONE
:
504 vhost
->action
= action
;
510 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
511 * @vhost: ibmvfc host struct
516 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
518 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
519 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
520 scsi_block_requests(vhost
->host
);
521 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
526 wake_up(&vhost
->work_wait_q
);
530 * ibmvfc_link_down - Handle a link down event from the adapter
531 * @vhost: ibmvfc host struct
532 * @state: ibmvfc host state to enter
535 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
536 enum ibmvfc_host_state state
)
538 struct ibmvfc_target
*tgt
;
541 scsi_block_requests(vhost
->host
);
542 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
543 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
544 ibmvfc_set_host_state(vhost
, state
);
545 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
546 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
547 wake_up(&vhost
->work_wait_q
);
552 * ibmvfc_init_host - Start host initialization
553 * @vhost: ibmvfc host struct
554 * @relogin: is this a re-login?
559 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
, int relogin
)
561 struct ibmvfc_target
*tgt
;
563 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
564 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
566 "Host initialization retries exceeded. Taking adapter offline\n");
567 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
572 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
574 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
575 vhost
->async_crq
.cur
= 0;
578 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
580 scsi_block_requests(vhost
->host
);
581 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
582 vhost
->job_step
= ibmvfc_npiv_login
;
583 wake_up(&vhost
->work_wait_q
);
588 * ibmvfc_send_crq - Send a CRQ
589 * @vhost: ibmvfc host struct
590 * @word1: the first 64 bits of the data
591 * @word2: the second 64 bits of the data
594 * 0 on success / other on failure
596 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
598 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
599 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
603 * ibmvfc_send_crq_init - Send a CRQ init message
604 * @vhost: ibmvfc host struct
607 * 0 on success / other on failure
609 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
611 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
612 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
616 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
617 * @vhost: ibmvfc host struct
620 * 0 on success / other on failure
622 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
624 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
625 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
629 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
630 * @vhost: ibmvfc host struct
632 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
633 * the crq with the hypervisor.
635 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
638 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
639 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
641 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
642 free_irq(vdev
->irq
, vhost
);
644 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
645 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
647 vhost
->state
= IBMVFC_NO_CRQ
;
648 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
649 free_page((unsigned long)crq
->msgs
);
653 * ibmvfc_reenable_crq_queue - reenables the CRQ
654 * @vhost: ibmvfc host struct
657 * 0 on success / other on failure
659 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
662 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
664 /* Re-enable the CRQ */
666 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
667 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
670 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
676 * ibmvfc_reset_crq - resets a crq after a failure
677 * @vhost: ibmvfc host struct
680 * 0 on success / other on failure
682 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
685 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
686 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
690 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
691 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
693 vhost
->state
= IBMVFC_NO_CRQ
;
694 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
696 /* Clean out the queue */
697 memset(crq
->msgs
, 0, PAGE_SIZE
);
700 /* And re-open it again */
701 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
702 crq
->msg_token
, PAGE_SIZE
);
705 /* Adapter is good, but other end is not ready */
706 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
708 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
714 * ibmvfc_valid_event - Determines if event is valid.
715 * @pool: event_pool that contains the event
716 * @evt: ibmvfc event to be checked for validity
719 * 1 if event is valid / 0 if event is not valid
721 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
722 struct ibmvfc_event
*evt
)
724 int index
= evt
- pool
->events
;
725 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
727 if (evt
!= pool
->events
+ index
) /* unaligned */
733 * ibmvfc_free_event - Free the specified event
734 * @evt: ibmvfc_event to be freed
737 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
739 struct ibmvfc_host
*vhost
= evt
->vhost
;
740 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
742 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
743 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
744 list_add_tail(&evt
->queue
, &vhost
->free
);
748 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
749 * @evt: ibmvfc event struct
751 * This function does not setup any error status, that must be done
752 * before this function gets called.
754 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
756 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
759 scsi_dma_unmap(cmnd
);
760 cmnd
->scsi_done(cmnd
);
764 complete(evt
->eh_comp
);
766 ibmvfc_free_event(evt
);
770 * ibmvfc_fail_request - Fail request with specified error code
771 * @evt: ibmvfc event struct
772 * @error_code: error code to fail request with
777 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
780 evt
->cmnd
->result
= (error_code
<< 16);
781 evt
->done
= ibmvfc_scsi_eh_done
;
783 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_DRIVER_FAILED
;
785 list_del(&evt
->queue
);
786 del_timer(&evt
->timer
);
792 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
793 * @vhost: ibmvfc host struct
794 * @error_code: error code to fail requests with
799 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
801 struct ibmvfc_event
*evt
, *pos
;
803 ibmvfc_dbg(vhost
, "Purging all requests\n");
804 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
805 ibmvfc_fail_request(evt
, error_code
);
809 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
810 * @vhost: struct ibmvfc host to reset
812 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
816 scsi_block_requests(vhost
->host
);
817 ibmvfc_purge_requests(vhost
, DID_ERROR
);
818 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
819 (rc
= ibmvfc_send_crq_init(vhost
)) ||
820 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
821 dev_err(vhost
->dev
, "Error after reset rc=%d\n", rc
);
822 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
824 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
828 * ibmvfc_reset_host - Reset the connection to the server
829 * @vhost: struct ibmvfc host to reset
831 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
835 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
836 __ibmvfc_reset_host(vhost
);
837 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
841 * ibmvfc_retry_host_init - Retry host initialization if allowed
842 * @vhost: ibmvfc host struct
845 static void ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
847 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
848 vhost
->delay_init
= 1;
849 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
851 "Host initialization retries exceeded. Taking adapter offline\n");
852 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
853 } else if (vhost
->init_retries
== IBMVFC_MAX_HOST_INIT_RETRIES
)
854 __ibmvfc_reset_host(vhost
);
856 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
859 wake_up(&vhost
->work_wait_q
);
863 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
864 * @starget: scsi target struct
867 * ibmvfc_target struct / NULL if not found
869 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
871 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
872 struct ibmvfc_host
*vhost
= shost_priv(shost
);
873 struct ibmvfc_target
*tgt
;
875 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
876 if (tgt
->target_id
== starget
->id
) {
877 kref_get(&tgt
->kref
);
884 * ibmvfc_get_target - Find the specified scsi_target
885 * @starget: scsi target struct
888 * ibmvfc_target struct / NULL if not found
890 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
892 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
893 struct ibmvfc_target
*tgt
;
896 spin_lock_irqsave(shost
->host_lock
, flags
);
897 tgt
= __ibmvfc_get_target(starget
);
898 spin_unlock_irqrestore(shost
->host_lock
, flags
);
903 * ibmvfc_get_host_speed - Get host port speed
904 * @shost: scsi host struct
909 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
911 struct ibmvfc_host
*vhost
= shost_priv(shost
);
914 spin_lock_irqsave(shost
->host_lock
, flags
);
915 if (vhost
->state
== IBMVFC_ACTIVE
) {
916 switch (vhost
->login_buf
->resp
.link_speed
/ 100) {
918 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
921 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
924 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
927 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
930 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
933 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
936 ibmvfc_log(vhost
, 3, "Unknown port speed: %lld Gbit\n",
937 vhost
->login_buf
->resp
.link_speed
/ 100);
938 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
942 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
943 spin_unlock_irqrestore(shost
->host_lock
, flags
);
947 * ibmvfc_get_host_port_state - Get host port state
948 * @shost: scsi host struct
953 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
955 struct ibmvfc_host
*vhost
= shost_priv(shost
);
958 spin_lock_irqsave(shost
->host_lock
, flags
);
959 switch (vhost
->state
) {
960 case IBMVFC_INITIALIZING
:
962 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
964 case IBMVFC_LINK_DOWN
:
965 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
967 case IBMVFC_LINK_DEAD
:
968 case IBMVFC_HOST_OFFLINE
:
969 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
972 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
975 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
978 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
979 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
982 spin_unlock_irqrestore(shost
->host_lock
, flags
);
986 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
987 * @rport: rport struct
988 * @timeout: timeout value
993 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
996 rport
->dev_loss_tmo
= timeout
;
998 rport
->dev_loss_tmo
= 1;
1002 * ibmvfc_release_tgt - Free memory allocated for a target
1003 * @kref: kref struct
1006 static void ibmvfc_release_tgt(struct kref
*kref
)
1008 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1013 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1014 * @starget: scsi target struct
1019 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1021 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1022 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1024 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1028 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1029 * @starget: scsi target struct
1034 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1036 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1037 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1039 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1043 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1044 * @starget: scsi target struct
1049 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1051 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1052 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1054 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1058 * ibmvfc_wait_while_resetting - Wait while the host resets
1059 * @vhost: ibmvfc host struct
1062 * 0 on success / other on failure
1064 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1066 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1067 ((vhost
->state
== IBMVFC_ACTIVE
||
1068 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1069 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1070 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1071 (init_timeout
* HZ
));
1073 return timeout
? 0 : -EIO
;
1077 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1078 * @shost: scsi host struct
1081 * 0 on success / other on failure
1083 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1085 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1087 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1088 ibmvfc_reset_host(vhost
);
1089 return ibmvfc_wait_while_resetting(vhost
);
1093 * ibmvfc_gather_partition_info - Gather info about the LPAR
1098 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1100 struct device_node
*rootdn
;
1102 const unsigned int *num
;
1104 rootdn
= of_find_node_by_path("/");
1108 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1110 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1111 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1113 vhost
->partition_number
= *num
;
1114 of_node_put(rootdn
);
1118 * ibmvfc_set_login_info - Setup info for NPIV login
1119 * @vhost: ibmvfc host struct
1124 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1126 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1127 struct device_node
*of_node
= vhost
->dev
->archdata
.of_node
;
1128 const char *location
;
1130 memset(login_info
, 0, sizeof(*login_info
));
1132 login_info
->ostype
= IBMVFC_OS_LINUX
;
1133 login_info
->max_dma_len
= IBMVFC_MAX_SECTORS
<< 9;
1134 login_info
->max_payload
= sizeof(struct ibmvfc_fcp_cmd_iu
);
1135 login_info
->max_response
= sizeof(struct ibmvfc_fcp_rsp
);
1136 login_info
->partition_num
= vhost
->partition_number
;
1137 login_info
->vfc_frame_version
= 1;
1138 login_info
->fcp_version
= 3;
1139 if (vhost
->client_migrated
)
1140 login_info
->flags
= IBMVFC_CLIENT_MIGRATED
;
1142 login_info
->max_cmds
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1143 login_info
->capabilities
= IBMVFC_CAN_MIGRATE
;
1144 login_info
->async
.va
= vhost
->async_crq
.msg_token
;
1145 login_info
->async
.len
= vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
);
1146 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1147 strncpy(login_info
->device_name
,
1148 dev_name(&vhost
->host
->shost_gendev
), IBMVFC_MAX_NAME
);
1150 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1151 location
= location
? location
: dev_name(vhost
->dev
);
1152 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1156 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1157 * @vhost: ibmvfc host who owns the event pool
1159 * Returns zero on success.
1161 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1164 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1167 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1168 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1172 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1173 pool
->size
* sizeof(*pool
->iu_storage
),
1174 &pool
->iu_token
, 0);
1176 if (!pool
->iu_storage
) {
1177 kfree(pool
->events
);
1181 for (i
= 0; i
< pool
->size
; ++i
) {
1182 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1183 atomic_set(&evt
->free
, 1);
1184 evt
->crq
.valid
= 0x80;
1185 evt
->crq
.ioba
= pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
);
1186 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1188 evt
->ext_list
= NULL
;
1189 list_add_tail(&evt
->queue
, &vhost
->free
);
1197 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1198 * @vhost: ibmvfc host who owns the event pool
1201 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1204 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1207 for (i
= 0; i
< pool
->size
; ++i
) {
1208 list_del(&pool
->events
[i
].queue
);
1209 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1210 if (pool
->events
[i
].ext_list
)
1211 dma_pool_free(vhost
->sg_pool
,
1212 pool
->events
[i
].ext_list
,
1213 pool
->events
[i
].ext_list_token
);
1216 kfree(pool
->events
);
1217 dma_free_coherent(vhost
->dev
,
1218 pool
->size
* sizeof(*pool
->iu_storage
),
1219 pool
->iu_storage
, pool
->iu_token
);
1224 * ibmvfc_get_event - Gets the next free event in pool
1225 * @vhost: ibmvfc host struct
1227 * Returns a free event from the pool.
1229 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1231 struct ibmvfc_event
*evt
;
1233 BUG_ON(list_empty(&vhost
->free
));
1234 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1235 atomic_set(&evt
->free
, 0);
1236 list_del(&evt
->queue
);
1241 * ibmvfc_init_event - Initialize fields in an event struct that are always
1244 * @done: Routine to call when the event is responded to
1245 * @format: SRP or MAD format
1247 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1248 void (*done
) (struct ibmvfc_event
*), u8 format
)
1251 evt
->sync_iu
= NULL
;
1252 evt
->crq
.format
= format
;
1254 evt
->eh_comp
= NULL
;
1258 * ibmvfc_map_sg_list - Initialize scatterlist
1259 * @scmd: scsi command struct
1260 * @nseg: number of scatterlist segments
1261 * @md: memory descriptor list to initialize
1263 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1264 struct srp_direct_buf
*md
)
1267 struct scatterlist
*sg
;
1269 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1270 md
[i
].va
= sg_dma_address(sg
);
1271 md
[i
].len
= sg_dma_len(sg
);
1277 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1278 * @scmd: Scsi_Cmnd with the scatterlist
1279 * @evt: ibmvfc event struct
1280 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1281 * @dev: device for which to map dma memory
1284 * 0 on success / non-zero on failure
1286 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1287 struct ibmvfc_event
*evt
,
1288 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1292 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1293 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1295 sg_mapped
= scsi_dma_map(scmd
);
1297 vfc_cmd
->flags
|= IBMVFC_NO_MEM_DESC
;
1299 } else if (unlikely(sg_mapped
< 0)) {
1300 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1301 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1305 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1306 vfc_cmd
->flags
|= IBMVFC_WRITE
;
1307 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1309 vfc_cmd
->flags
|= IBMVFC_READ
;
1310 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1313 if (sg_mapped
== 1) {
1314 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1318 vfc_cmd
->flags
|= IBMVFC_SCATTERLIST
;
1320 if (!evt
->ext_list
) {
1321 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1322 &evt
->ext_list_token
);
1324 if (!evt
->ext_list
) {
1325 scsi_dma_unmap(scmd
);
1326 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1327 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1332 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1334 data
->va
= evt
->ext_list_token
;
1335 data
->len
= sg_mapped
* sizeof(struct srp_direct_buf
);
1341 * ibmvfc_timeout - Internal command timeout handler
1342 * @evt: struct ibmvfc_event that timed out
1344 * Called when an internally generated command times out
1346 static void ibmvfc_timeout(struct ibmvfc_event
*evt
)
1348 struct ibmvfc_host
*vhost
= evt
->vhost
;
1349 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1350 ibmvfc_reset_host(vhost
);
1354 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1355 * @evt: event to be sent
1356 * @vhost: ibmvfc host struct
1357 * @timeout: timeout in seconds - 0 means do not time command
1359 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1361 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1362 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1364 u64
*crq_as_u64
= (u64
*) &evt
->crq
;
1367 /* Copy the IU into the transfer area */
1368 *evt
->xfer_iu
= evt
->iu
;
1369 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1370 evt
->xfer_iu
->cmd
.tag
= (u64
)evt
;
1371 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1372 evt
->xfer_iu
->mad_common
.tag
= (u64
)evt
;
1376 list_add_tail(&evt
->queue
, &vhost
->sent
);
1377 init_timer(&evt
->timer
);
1380 evt
->timer
.data
= (unsigned long) evt
;
1381 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1382 evt
->timer
.function
= (void (*)(unsigned long))ibmvfc_timeout
;
1383 add_timer(&evt
->timer
);
1388 if ((rc
= ibmvfc_send_crq(vhost
, crq_as_u64
[0], crq_as_u64
[1]))) {
1389 list_del(&evt
->queue
);
1390 del_timer(&evt
->timer
);
1392 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1393 * Firmware will send a CRQ with a transport event (0xFF) to
1394 * tell this client what has happened to the transport. This
1395 * will be handled in ibmvfc_handle_crq()
1397 if (rc
== H_CLOSED
) {
1398 if (printk_ratelimit())
1399 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1401 scsi_dma_unmap(evt
->cmnd
);
1402 ibmvfc_free_event(evt
);
1403 return SCSI_MLQUEUE_HOST_BUSY
;
1406 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1408 evt
->cmnd
->result
= DID_ERROR
<< 16;
1409 evt
->done
= ibmvfc_scsi_eh_done
;
1411 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_CRQ_ERROR
;
1415 ibmvfc_trc_start(evt
);
1421 * ibmvfc_log_error - Log an error for the failed command if appropriate
1422 * @evt: ibmvfc event to log
1425 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1427 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1428 struct ibmvfc_host
*vhost
= evt
->vhost
;
1429 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1430 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1431 const char *err
= unknown_error
;
1432 int index
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
1437 logerr
= cmd_status
[index
].log
;
1438 err
= cmd_status
[index
].name
;
1441 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1444 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1445 rsp_code
= rsp
->data
.info
.rsp_code
;
1447 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1448 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1449 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1450 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1454 * ibmvfc_scsi_done - Handle responses from commands
1455 * @evt: ibmvfc event to be handled
1457 * Used as a callback when sending scsi cmds.
1459 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1461 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1462 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1463 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1465 u32 sense_len
= rsp
->fcp_sense_len
;
1468 if (vfc_cmd
->response_flags
& IBMVFC_ADAPTER_RESID_VALID
)
1469 scsi_set_resid(cmnd
, vfc_cmd
->adapter_resid
);
1470 else if (rsp
->flags
& FCP_RESID_UNDER
)
1471 scsi_set_resid(cmnd
, rsp
->fcp_resid
);
1473 scsi_set_resid(cmnd
, 0);
1475 if (vfc_cmd
->status
) {
1476 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1478 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1479 rsp_len
= rsp
->fcp_rsp_len
;
1480 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1481 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1482 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1483 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1484 if ((vfc_cmd
->status
& IBMVFC_VIOS_FAILURE
) && (vfc_cmd
->error
== IBMVFC_PLOGI_REQUIRED
))
1485 ibmvfc_reinit_host(evt
->vhost
);
1487 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1488 cmnd
->result
= (DID_ERROR
<< 16);
1490 ibmvfc_log_error(evt
);
1493 if (!cmnd
->result
&&
1494 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1495 cmnd
->result
= (DID_ERROR
<< 16);
1497 scsi_dma_unmap(cmnd
);
1498 cmnd
->scsi_done(cmnd
);
1502 complete(evt
->eh_comp
);
1504 ibmvfc_free_event(evt
);
1508 * ibmvfc_host_chkready - Check if the host can accept commands
1509 * @vhost: struct ibmvfc host
1512 * 1 if host can accept command / 0 if not
1514 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1518 switch (vhost
->state
) {
1519 case IBMVFC_LINK_DEAD
:
1520 case IBMVFC_HOST_OFFLINE
:
1521 result
= DID_NO_CONNECT
<< 16;
1524 case IBMVFC_INITIALIZING
:
1526 case IBMVFC_LINK_DOWN
:
1527 result
= DID_REQUEUE
<< 16;
1538 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1539 * @cmnd: struct scsi_cmnd to be executed
1540 * @done: Callback function to be called when cmnd is completed
1543 * 0 on success / other on failure
1545 static int ibmvfc_queuecommand(struct scsi_cmnd
*cmnd
,
1546 void (*done
) (struct scsi_cmnd
*))
1548 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1549 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1550 struct ibmvfc_cmd
*vfc_cmd
;
1551 struct ibmvfc_event
*evt
;
1555 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1556 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1562 cmnd
->result
= (DID_OK
<< 16);
1563 evt
= ibmvfc_get_event(vhost
);
1564 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1566 cmnd
->scsi_done
= done
;
1567 vfc_cmd
= &evt
->iu
.cmd
;
1568 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1569 vfc_cmd
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1570 vfc_cmd
->resp
.len
= sizeof(vfc_cmd
->rsp
);
1571 vfc_cmd
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1572 vfc_cmd
->payload_len
= sizeof(vfc_cmd
->iu
);
1573 vfc_cmd
->resp_len
= sizeof(vfc_cmd
->rsp
);
1574 vfc_cmd
->cancel_key
= (unsigned long)cmnd
->device
->hostdata
;
1575 vfc_cmd
->tgt_scsi_id
= rport
->port_id
;
1576 if ((rport
->supported_classes
& FC_COS_CLASS3
) &&
1577 (fc_host_supported_classes(vhost
->host
) & FC_COS_CLASS3
))
1578 vfc_cmd
->flags
= IBMVFC_CLASS_3_ERR
;
1579 vfc_cmd
->iu
.xfer_len
= scsi_bufflen(cmnd
);
1580 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1581 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1583 if (scsi_populate_tag_msg(cmnd
, tag
)) {
1584 vfc_cmd
->task_tag
= tag
[1];
1586 case MSG_SIMPLE_TAG
:
1587 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1590 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_HEAD_OF_QUEUE
;
1592 case MSG_ORDERED_TAG
:
1593 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_ORDERED_TASK
;
1598 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1599 return ibmvfc_send_event(evt
, vhost
, 0);
1601 ibmvfc_free_event(evt
);
1603 return SCSI_MLQUEUE_HOST_BUSY
;
1605 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1606 scmd_printk(KERN_ERR
, cmnd
,
1607 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1609 cmnd
->result
= DID_ERROR
<< 16;
1615 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1616 * @evt: ibmvfc event struct
1619 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1621 /* copy the response back */
1623 *evt
->sync_iu
= *evt
->xfer_iu
;
1625 complete(&evt
->comp
);
1629 * ibmvfc_reset_device - Reset the device with the specified reset type
1630 * @sdev: scsi device to reset
1632 * @desc: reset type description for log messages
1635 * 0 on success / other on failure
1637 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1639 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1640 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1641 struct ibmvfc_cmd
*tmf
;
1642 struct ibmvfc_event
*evt
= NULL
;
1643 union ibmvfc_iu rsp_iu
;
1644 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1645 int rsp_rc
= -EBUSY
;
1646 unsigned long flags
;
1649 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1650 if (vhost
->state
== IBMVFC_ACTIVE
) {
1651 evt
= ibmvfc_get_event(vhost
);
1652 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1655 memset(tmf
, 0, sizeof(*tmf
));
1656 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1657 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1658 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1659 tmf
->payload_len
= sizeof(tmf
->iu
);
1660 tmf
->resp_len
= sizeof(tmf
->rsp
);
1661 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1662 tmf
->tgt_scsi_id
= rport
->port_id
;
1663 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1664 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1665 tmf
->iu
.tmf_flags
= type
;
1666 evt
->sync_iu
= &rsp_iu
;
1668 init_completion(&evt
->comp
);
1669 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1671 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1674 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
1679 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
1680 wait_for_completion(&evt
->comp
);
1682 if (rsp_iu
.cmd
.status
) {
1683 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
1684 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
1686 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
1687 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1688 desc
, ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
1689 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
1690 fc_rsp
->scsi_status
);
1693 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
1695 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1696 ibmvfc_free_event(evt
);
1697 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1702 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1703 * @sdev: scsi device to abort commands
1705 * This sends an Abort Task Set to the VIOS for the specified device. This does
1706 * NOT send any cancel to the VIOS. That must be done separately.
1709 * 0 on success / other on failure
1711 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
1713 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1714 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1715 struct ibmvfc_cmd
*tmf
;
1716 struct ibmvfc_event
*evt
, *found_evt
;
1717 union ibmvfc_iu rsp_iu
;
1718 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1719 int rsp_rc
= -EBUSY
;
1720 unsigned long flags
;
1723 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1725 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1726 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
1733 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1734 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
1735 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1739 if (vhost
->state
== IBMVFC_ACTIVE
) {
1740 evt
= ibmvfc_get_event(vhost
);
1741 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1744 memset(tmf
, 0, sizeof(*tmf
));
1745 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1746 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1747 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1748 tmf
->payload_len
= sizeof(tmf
->iu
);
1749 tmf
->resp_len
= sizeof(tmf
->rsp
);
1750 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1751 tmf
->tgt_scsi_id
= rport
->port_id
;
1752 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1753 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1754 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
1755 evt
->sync_iu
= &rsp_iu
;
1757 init_completion(&evt
->comp
);
1758 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1761 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1764 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
1768 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
1769 wait_for_completion(&evt
->comp
);
1771 if (rsp_iu
.cmd
.status
) {
1772 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
1773 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
1775 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
1776 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1777 ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
1778 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
1779 fc_rsp
->scsi_status
);
1782 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
1784 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1785 ibmvfc_free_event(evt
);
1786 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1791 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1792 * @sdev: scsi device to cancel commands
1793 * @type: type of error recovery being performed
1795 * This sends a cancel to the VIOS for the specified device. This does
1796 * NOT send any abort to the actual device. That must be done separately.
1799 * 0 on success / other on failure
1801 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
1803 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1804 struct scsi_target
*starget
= scsi_target(sdev
);
1805 struct fc_rport
*rport
= starget_to_rport(starget
);
1806 struct ibmvfc_tmf
*tmf
;
1807 struct ibmvfc_event
*evt
, *found_evt
;
1808 union ibmvfc_iu rsp
;
1809 int rsp_rc
= -EBUSY
;
1810 unsigned long flags
;
1814 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1816 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1817 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
1824 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1825 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
1826 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1830 if (vhost
->state
== IBMVFC_ACTIVE
) {
1831 evt
= ibmvfc_get_event(vhost
);
1832 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1835 memset(tmf
, 0, sizeof(*tmf
));
1836 tmf
->common
.version
= 1;
1837 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
1838 tmf
->common
.length
= sizeof(*tmf
);
1839 tmf
->scsi_id
= rport
->port_id
;
1840 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
1841 tmf
->flags
= (type
| IBMVFC_TMF_LUA_VALID
);
1842 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1843 tmf
->my_cancel_key
= (unsigned long)starget
->hostdata
;
1845 evt
->sync_iu
= &rsp
;
1846 init_completion(&evt
->comp
);
1847 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1850 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1853 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
1857 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
1859 wait_for_completion(&evt
->comp
);
1860 status
= rsp
.mad_common
.status
;
1861 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1862 ibmvfc_free_event(evt
);
1863 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1865 if (status
!= IBMVFC_MAD_SUCCESS
) {
1866 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
1870 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
1875 * ibmvfc_match_target - Match function for specified target
1876 * @evt: ibmvfc event struct
1877 * @device: device to match (starget)
1880 * 1 if event matches starget / 0 if event does not match starget
1882 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
1884 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
1890 * ibmvfc_match_lun - Match function for specified LUN
1891 * @evt: ibmvfc event struct
1892 * @device: device to match (sdev)
1895 * 1 if event matches sdev / 0 if event does not match sdev
1897 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
1899 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
1905 * ibmvfc_wait_for_ops - Wait for ops to complete
1906 * @vhost: ibmvfc host struct
1907 * @device: device to match (starget or sdev)
1908 * @match: match function
1913 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
1914 int (*match
) (struct ibmvfc_event
*, void *))
1916 struct ibmvfc_event
*evt
;
1917 DECLARE_COMPLETION_ONSTACK(comp
);
1919 unsigned long flags
;
1920 signed long timeout
= init_timeout
* HZ
;
1925 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1926 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1927 if (match(evt
, device
)) {
1928 evt
->eh_comp
= &comp
;
1932 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1935 timeout
= wait_for_completion_timeout(&comp
, timeout
);
1939 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1940 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1941 if (match(evt
, device
)) {
1942 evt
->eh_comp
= NULL
;
1946 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1948 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
1950 return wait
? FAILED
: SUCCESS
;
1960 * ibmvfc_eh_abort_handler - Abort a command
1961 * @cmd: scsi command to abort
1966 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
1968 struct scsi_device
*sdev
= cmd
->device
;
1969 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1970 int cancel_rc
, abort_rc
;
1974 ibmvfc_wait_while_resetting(vhost
);
1975 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
1976 abort_rc
= ibmvfc_abort_task_set(sdev
);
1978 if (!cancel_rc
&& !abort_rc
)
1979 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
1986 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1987 * @cmd: scsi command struct
1992 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
1994 struct scsi_device
*sdev
= cmd
->device
;
1995 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1996 int cancel_rc
, reset_rc
;
2000 ibmvfc_wait_while_resetting(vhost
);
2001 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
2002 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
2004 if (!cancel_rc
&& !reset_rc
)
2005 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2012 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2013 * @sdev: scsi device struct
2014 * @data: return code
2017 static void ibmvfc_dev_cancel_all(struct scsi_device
*sdev
, void *data
)
2019 unsigned long *rc
= data
;
2020 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2024 * ibmvfc_dev_abort_all - Device iterated abort task set function
2025 * @sdev: scsi device struct
2026 * @data: return code
2029 static void ibmvfc_dev_abort_all(struct scsi_device
*sdev
, void *data
)
2031 unsigned long *rc
= data
;
2032 *rc
|= ibmvfc_abort_task_set(sdev
);
2036 * ibmvfc_eh_target_reset_handler - Reset the target
2037 * @cmd: scsi command struct
2042 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2044 struct scsi_device
*sdev
= cmd
->device
;
2045 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2046 struct scsi_target
*starget
= scsi_target(sdev
);
2049 unsigned long cancel_rc
= 0;
2052 ibmvfc_wait_while_resetting(vhost
);
2053 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all
);
2054 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2056 if (!cancel_rc
&& !reset_rc
)
2057 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2064 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2065 * @cmd: struct scsi_cmnd having problems
2068 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2071 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2073 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2074 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2075 return rc
? FAILED
: SUCCESS
;
2079 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2080 * @rport: rport struct
2085 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2087 struct scsi_target
*starget
= to_scsi_target(&rport
->dev
);
2088 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2089 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2090 unsigned long cancel_rc
= 0;
2091 unsigned long abort_rc
= 0;
2095 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all
);
2096 starget_for_each_device(starget
, &abort_rc
, ibmvfc_dev_abort_all
);
2098 if (!cancel_rc
&& !abort_rc
)
2099 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2102 ibmvfc_issue_fc_host_lip(shost
);
2106 static const struct {
2107 enum ibmvfc_async_event ae
;
2110 { IBMVFC_AE_ELS_PLOGI
, "PLOGI" },
2111 { IBMVFC_AE_ELS_LOGO
, "LOGO" },
2112 { IBMVFC_AE_ELS_PRLO
, "PRLO" },
2113 { IBMVFC_AE_SCN_NPORT
, "N-Port SCN" },
2114 { IBMVFC_AE_SCN_GROUP
, "Group SCN" },
2115 { IBMVFC_AE_SCN_DOMAIN
, "Domain SCN" },
2116 { IBMVFC_AE_SCN_FABRIC
, "Fabric SCN" },
2117 { IBMVFC_AE_LINK_UP
, "Link Up" },
2118 { IBMVFC_AE_LINK_DOWN
, "Link Down" },
2119 { IBMVFC_AE_LINK_DEAD
, "Link Dead" },
2120 { IBMVFC_AE_HALT
, "Halt" },
2121 { IBMVFC_AE_RESUME
, "Resume" },
2122 { IBMVFC_AE_ADAPTER_FAILED
, "Adapter Failed" },
2125 static const char *unknown_ae
= "Unknown async";
2128 * ibmvfc_get_ae_desc - Get text description for async event
2132 static const char *ibmvfc_get_ae_desc(u64 ae
)
2136 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2137 if (ae_desc
[i
].ae
== ae
)
2138 return ae_desc
[i
].desc
;
2144 * ibmvfc_handle_async - Handle an async event from the adapter
2145 * @crq: crq to process
2146 * @vhost: ibmvfc host struct
2149 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2150 struct ibmvfc_host
*vhost
)
2152 const char *desc
= ibmvfc_get_ae_desc(crq
->event
);
2154 ibmvfc_log(vhost
, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2155 " node_name: %llx\n", desc
, crq
->scsi_id
, crq
->wwpn
, crq
->node_name
);
2157 switch (crq
->event
) {
2158 case IBMVFC_AE_LINK_UP
:
2159 case IBMVFC_AE_RESUME
:
2160 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2161 vhost
->delay_init
= 1;
2162 __ibmvfc_reset_host(vhost
);
2164 case IBMVFC_AE_SCN_FABRIC
:
2165 case IBMVFC_AE_SCN_DOMAIN
:
2166 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2167 vhost
->delay_init
= 1;
2168 __ibmvfc_reset_host(vhost
);
2170 case IBMVFC_AE_SCN_NPORT
:
2171 case IBMVFC_AE_SCN_GROUP
:
2172 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2173 case IBMVFC_AE_ELS_LOGO
:
2174 case IBMVFC_AE_ELS_PRLO
:
2175 case IBMVFC_AE_ELS_PLOGI
:
2176 ibmvfc_reinit_host(vhost
);
2178 case IBMVFC_AE_LINK_DOWN
:
2179 case IBMVFC_AE_ADAPTER_FAILED
:
2180 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2182 case IBMVFC_AE_LINK_DEAD
:
2183 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2185 case IBMVFC_AE_HALT
:
2186 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2189 dev_err(vhost
->dev
, "Unknown async event received: %lld\n", crq
->event
);
2195 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2196 * @crq: Command/Response queue
2197 * @vhost: ibmvfc host struct
2200 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2203 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)crq
->ioba
;
2205 switch (crq
->valid
) {
2206 case IBMVFC_CRQ_INIT_RSP
:
2207 switch (crq
->format
) {
2208 case IBMVFC_CRQ_INIT
:
2209 dev_info(vhost
->dev
, "Partner initialized\n");
2210 /* Send back a response */
2211 rc
= ibmvfc_send_crq_init_complete(vhost
);
2213 ibmvfc_init_host(vhost
, 0);
2215 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2217 case IBMVFC_CRQ_INIT_COMPLETE
:
2218 dev_info(vhost
->dev
, "Partner initialization complete\n");
2219 ibmvfc_init_host(vhost
, 0);
2222 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2225 case IBMVFC_CRQ_XPORT_EVENT
:
2226 vhost
->state
= IBMVFC_NO_CRQ
;
2227 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2228 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2229 /* We need to re-setup the interpartition connection */
2230 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2231 vhost
->client_migrated
= 1;
2232 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2233 if ((rc
= ibmvfc_reenable_crq_queue(vhost
)) ||
2234 (rc
= ibmvfc_send_crq_init(vhost
))) {
2235 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2236 dev_err(vhost
->dev
, "Error after enable (rc=%ld)\n", rc
);
2238 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2240 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2242 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2243 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
2244 (rc
= ibmvfc_send_crq_init(vhost
))) {
2245 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2246 dev_err(vhost
->dev
, "Error after reset (rc=%ld)\n", rc
);
2248 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2251 case IBMVFC_CRQ_CMD_RSP
:
2254 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2258 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2261 /* The only kind of payload CRQs we should get are responses to
2262 * things we send. Make sure this response is to something we
2265 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2266 dev_err(vhost
->dev
, "Returned correlation_token 0x%08llx is invalid!\n",
2271 if (unlikely(atomic_read(&evt
->free
))) {
2272 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08llx!\n",
2277 del_timer(&evt
->timer
);
2278 list_del(&evt
->queue
);
2279 ibmvfc_trc_end(evt
);
2284 * ibmvfc_scan_finished - Check if the device scan is done.
2285 * @shost: scsi host struct
2286 * @time: current elapsed time
2289 * 0 if scan is not done / 1 if scan is done
2291 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2293 unsigned long flags
;
2294 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2297 spin_lock_irqsave(shost
->host_lock
, flags
);
2298 if (time
>= (init_timeout
* HZ
)) {
2299 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2300 "continuing initialization\n", init_timeout
);
2304 if (vhost
->state
!= IBMVFC_NO_CRQ
&& vhost
->action
== IBMVFC_HOST_ACTION_NONE
)
2306 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2311 * ibmvfc_slave_alloc - Setup the device's task set value
2312 * @sdev: struct scsi_device device to configure
2314 * Set the device's task set value so that error handling works as
2318 * 0 on success / -ENXIO if device does not exist
2320 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2322 struct Scsi_Host
*shost
= sdev
->host
;
2323 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2324 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2325 unsigned long flags
= 0;
2327 if (!rport
|| fc_remote_port_chkready(rport
))
2330 spin_lock_irqsave(shost
->host_lock
, flags
);
2331 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2332 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2337 * ibmvfc_target_alloc - Setup the target's task set value
2338 * @starget: struct scsi_target
2340 * Set the target's task set value so that error handling works as
2344 * 0 on success / -ENXIO if device does not exist
2346 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2348 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2349 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2350 unsigned long flags
= 0;
2352 spin_lock_irqsave(shost
->host_lock
, flags
);
2353 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2354 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2359 * ibmvfc_slave_configure - Configure the device
2360 * @sdev: struct scsi_device device to configure
2362 * Enable allow_restart for a device if it is a disk. Adjust the
2363 * queue_depth here also.
2368 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2370 struct Scsi_Host
*shost
= sdev
->host
;
2371 struct fc_rport
*rport
= starget_to_rport(sdev
->sdev_target
);
2372 unsigned long flags
= 0;
2374 spin_lock_irqsave(shost
->host_lock
, flags
);
2375 if (sdev
->type
== TYPE_DISK
)
2376 sdev
->allow_restart
= 1;
2378 if (sdev
->tagged_supported
) {
2379 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
2380 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2382 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2384 rport
->dev_loss_tmo
= dev_loss_tmo
;
2385 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2390 * ibmvfc_change_queue_depth - Change the device's queue depth
2391 * @sdev: scsi device struct
2392 * @qdepth: depth to set
2397 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
)
2399 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2400 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2402 scsi_adjust_queue_depth(sdev
, 0, qdepth
);
2403 return sdev
->queue_depth
;
2407 * ibmvfc_change_queue_type - Change the device's queue type
2408 * @sdev: scsi device struct
2409 * @tag_type: type of tags to use
2412 * actual queue type set
2414 static int ibmvfc_change_queue_type(struct scsi_device
*sdev
, int tag_type
)
2416 if (sdev
->tagged_supported
) {
2417 scsi_set_tag_type(sdev
, tag_type
);
2420 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2422 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2429 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2430 struct device_attribute
*attr
, char *buf
)
2432 struct Scsi_Host
*shost
= class_to_shost(dev
);
2433 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2435 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2436 vhost
->login_buf
->resp
.partition_name
);
2439 static struct device_attribute ibmvfc_host_partition_name
= {
2441 .name
= "partition_name",
2444 .show
= ibmvfc_show_host_partition_name
,
2447 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2448 struct device_attribute
*attr
, char *buf
)
2450 struct Scsi_Host
*shost
= class_to_shost(dev
);
2451 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2453 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2454 vhost
->login_buf
->resp
.device_name
);
2457 static struct device_attribute ibmvfc_host_device_name
= {
2459 .name
= "device_name",
2462 .show
= ibmvfc_show_host_device_name
,
2465 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2466 struct device_attribute
*attr
, char *buf
)
2468 struct Scsi_Host
*shost
= class_to_shost(dev
);
2469 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2471 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2472 vhost
->login_buf
->resp
.port_loc_code
);
2475 static struct device_attribute ibmvfc_host_loc_code
= {
2477 .name
= "port_loc_code",
2480 .show
= ibmvfc_show_host_loc_code
,
2483 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2484 struct device_attribute
*attr
, char *buf
)
2486 struct Scsi_Host
*shost
= class_to_shost(dev
);
2487 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2489 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2490 vhost
->login_buf
->resp
.drc_name
);
2493 static struct device_attribute ibmvfc_host_drc_name
= {
2498 .show
= ibmvfc_show_host_drc_name
,
2501 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2502 struct device_attribute
*attr
, char *buf
)
2504 struct Scsi_Host
*shost
= class_to_shost(dev
);
2505 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2506 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2509 static struct device_attribute ibmvfc_host_npiv_version
= {
2511 .name
= "npiv_version",
2514 .show
= ibmvfc_show_host_npiv_version
,
2518 * ibmvfc_show_log_level - Show the adapter's error logging level
2519 * @dev: class device struct
2523 * number of bytes printed to buffer
2525 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2526 struct device_attribute
*attr
, char *buf
)
2528 struct Scsi_Host
*shost
= class_to_shost(dev
);
2529 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2530 unsigned long flags
= 0;
2533 spin_lock_irqsave(shost
->host_lock
, flags
);
2534 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2535 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2540 * ibmvfc_store_log_level - Change the adapter's error logging level
2541 * @dev: class device struct
2545 * number of bytes printed to buffer
2547 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
2548 struct device_attribute
*attr
,
2549 const char *buf
, size_t count
)
2551 struct Scsi_Host
*shost
= class_to_shost(dev
);
2552 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2553 unsigned long flags
= 0;
2555 spin_lock_irqsave(shost
->host_lock
, flags
);
2556 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
2557 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2561 static struct device_attribute ibmvfc_log_level_attr
= {
2563 .name
= "log_level",
2564 .mode
= S_IRUGO
| S_IWUSR
,
2566 .show
= ibmvfc_show_log_level
,
2567 .store
= ibmvfc_store_log_level
2570 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2572 * ibmvfc_read_trace - Dump the adapter trace
2573 * @kobj: kobject struct
2574 * @bin_attr: bin_attribute struct
2577 * @count: buffer size
2580 * number of bytes printed to buffer
2582 static ssize_t
ibmvfc_read_trace(struct kobject
*kobj
,
2583 struct bin_attribute
*bin_attr
,
2584 char *buf
, loff_t off
, size_t count
)
2586 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
2587 struct Scsi_Host
*shost
= class_to_shost(dev
);
2588 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2589 unsigned long flags
= 0;
2590 int size
= IBMVFC_TRACE_SIZE
;
2591 char *src
= (char *)vhost
->trace
;
2595 if (off
+ count
> size
) {
2600 spin_lock_irqsave(shost
->host_lock
, flags
);
2601 memcpy(buf
, &src
[off
], count
);
2602 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2606 static struct bin_attribute ibmvfc_trace_attr
= {
2612 .read
= ibmvfc_read_trace
,
2616 static struct device_attribute
*ibmvfc_attrs
[] = {
2617 &ibmvfc_host_partition_name
,
2618 &ibmvfc_host_device_name
,
2619 &ibmvfc_host_loc_code
,
2620 &ibmvfc_host_drc_name
,
2621 &ibmvfc_host_npiv_version
,
2622 &ibmvfc_log_level_attr
,
2626 static struct scsi_host_template driver_template
= {
2627 .module
= THIS_MODULE
,
2628 .name
= "IBM POWER Virtual FC Adapter",
2629 .proc_name
= IBMVFC_NAME
,
2630 .queuecommand
= ibmvfc_queuecommand
,
2631 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
2632 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
2633 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
2634 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
2635 .slave_alloc
= ibmvfc_slave_alloc
,
2636 .slave_configure
= ibmvfc_slave_configure
,
2637 .target_alloc
= ibmvfc_target_alloc
,
2638 .scan_finished
= ibmvfc_scan_finished
,
2639 .change_queue_depth
= ibmvfc_change_queue_depth
,
2640 .change_queue_type
= ibmvfc_change_queue_type
,
2642 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
2644 .sg_tablesize
= SG_ALL
,
2645 .max_sectors
= IBMVFC_MAX_SECTORS
,
2646 .use_clustering
= ENABLE_CLUSTERING
,
2647 .shost_attrs
= ibmvfc_attrs
,
2651 * ibmvfc_next_async_crq - Returns the next entry in async queue
2652 * @vhost: ibmvfc host struct
2655 * Pointer to next entry in queue / NULL if empty
2657 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
2659 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
2660 struct ibmvfc_async_crq
*crq
;
2662 crq
= &async_crq
->msgs
[async_crq
->cur
];
2663 if (crq
->valid
& 0x80) {
2664 if (++async_crq
->cur
== async_crq
->size
)
2673 * ibmvfc_next_crq - Returns the next entry in message queue
2674 * @vhost: ibmvfc host struct
2677 * Pointer to next entry in queue / NULL if empty
2679 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
2681 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
2682 struct ibmvfc_crq
*crq
;
2684 crq
= &queue
->msgs
[queue
->cur
];
2685 if (crq
->valid
& 0x80) {
2686 if (++queue
->cur
== queue
->size
)
2695 * ibmvfc_interrupt - Interrupt handler
2696 * @irq: number of irq to handle, not used
2697 * @dev_instance: ibmvfc_host that received interrupt
2702 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
2704 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
2705 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
2706 struct ibmvfc_crq
*crq
;
2707 struct ibmvfc_async_crq
*async
;
2708 unsigned long flags
;
2711 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2712 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
2714 /* Pull all the valid messages off the CRQ */
2715 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
2716 ibmvfc_handle_crq(crq
, vhost
);
2720 /* Pull all the valid messages off the async CRQ */
2721 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
2722 ibmvfc_handle_async(async
, vhost
);
2726 vio_enable_interrupts(vdev
);
2727 if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
2728 vio_disable_interrupts(vdev
);
2729 ibmvfc_handle_crq(crq
, vhost
);
2731 } else if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
2732 vio_disable_interrupts(vdev
);
2733 ibmvfc_handle_async(async
, vhost
);
2739 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2744 * ibmvfc_init_tgt - Set the next init job step for the target
2745 * @tgt: ibmvfc target struct
2746 * @job_step: job step to perform
2749 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
2750 void (*job_step
) (struct ibmvfc_target
*))
2752 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
2753 tgt
->job_step
= job_step
;
2754 wake_up(&tgt
->vhost
->work_wait_q
);
2758 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2759 * @tgt: ibmvfc target struct
2760 * @job_step: initialization job step
2763 static void ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
2764 void (*job_step
) (struct ibmvfc_target
*))
2766 if (++tgt
->init_retries
> IBMVFC_MAX_TGT_INIT_RETRIES
) {
2767 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2768 wake_up(&tgt
->vhost
->work_wait_q
);
2770 ibmvfc_init_tgt(tgt
, job_step
);
2774 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2775 * @evt: ibmvfc event struct
2778 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
2780 struct ibmvfc_target
*tgt
= evt
->tgt
;
2781 struct ibmvfc_host
*vhost
= evt
->vhost
;
2782 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
2783 u32 status
= rsp
->common
.status
;
2785 vhost
->discovery_threads
--;
2786 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2788 case IBMVFC_MAD_SUCCESS
:
2789 tgt_dbg(tgt
, "Process Login succeeded\n");
2790 tgt
->need_login
= 0;
2791 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_ADD_RPORT
);
2793 case IBMVFC_MAD_DRIVER_FAILED
:
2795 case IBMVFC_MAD_CRQ_ERROR
:
2796 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2798 case IBMVFC_MAD_FAILED
:
2800 tgt_err(tgt
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2801 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
),
2802 rsp
->status
, rsp
->error
, status
);
2803 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
2804 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2806 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2810 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2811 ibmvfc_free_event(evt
);
2812 wake_up(&vhost
->work_wait_q
);
2816 * ibmvfc_tgt_send_prli - Send a process login
2817 * @tgt: ibmvfc target struct
2820 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
2822 struct ibmvfc_process_login
*prli
;
2823 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2824 struct ibmvfc_event
*evt
;
2826 if (vhost
->discovery_threads
>= disc_threads
)
2829 kref_get(&tgt
->kref
);
2830 evt
= ibmvfc_get_event(vhost
);
2831 vhost
->discovery_threads
++;
2832 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
2834 prli
= &evt
->iu
.prli
;
2835 memset(prli
, 0, sizeof(*prli
));
2836 prli
->common
.version
= 1;
2837 prli
->common
.opcode
= IBMVFC_PROCESS_LOGIN
;
2838 prli
->common
.length
= sizeof(*prli
);
2839 prli
->scsi_id
= tgt
->scsi_id
;
2841 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
2842 prli
->parms
.flags
= IBMVFC_PRLI_EST_IMG_PAIR
;
2843 prli
->parms
.service_parms
= IBMVFC_PRLI_INITIATOR_FUNC
;
2845 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
2846 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
2847 vhost
->discovery_threads
--;
2848 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2849 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2851 tgt_dbg(tgt
, "Sent process login\n");
2855 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2856 * @evt: ibmvfc event struct
2859 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
2861 struct ibmvfc_target
*tgt
= evt
->tgt
;
2862 struct ibmvfc_host
*vhost
= evt
->vhost
;
2863 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
2864 u32 status
= rsp
->common
.status
;
2866 vhost
->discovery_threads
--;
2867 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2869 case IBMVFC_MAD_SUCCESS
:
2870 tgt_dbg(tgt
, "Port Login succeeded\n");
2871 if (tgt
->ids
.port_name
&&
2872 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
2874 tgt_dbg(tgt
, "Port re-init required\n");
2877 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
2878 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
2879 tgt
->ids
.port_id
= tgt
->scsi_id
;
2880 tgt
->ids
.roles
= FC_PORT_ROLE_FCP_TARGET
;
2881 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
2882 sizeof(tgt
->service_parms
));
2883 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
2884 sizeof(tgt
->service_parms_change
));
2885 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
2887 case IBMVFC_MAD_DRIVER_FAILED
:
2889 case IBMVFC_MAD_CRQ_ERROR
:
2890 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
2892 case IBMVFC_MAD_FAILED
:
2894 tgt_err(tgt
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2895 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
2896 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
2897 ibmvfc_get_ls_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
2899 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
2900 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
2902 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2906 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2907 ibmvfc_free_event(evt
);
2908 wake_up(&vhost
->work_wait_q
);
2912 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
2913 * @tgt: ibmvfc target struct
2916 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
2918 struct ibmvfc_port_login
*plogi
;
2919 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2920 struct ibmvfc_event
*evt
;
2922 if (vhost
->discovery_threads
>= disc_threads
)
2925 kref_get(&tgt
->kref
);
2926 evt
= ibmvfc_get_event(vhost
);
2927 vhost
->discovery_threads
++;
2928 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
2929 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
2931 plogi
= &evt
->iu
.plogi
;
2932 memset(plogi
, 0, sizeof(*plogi
));
2933 plogi
->common
.version
= 1;
2934 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
2935 plogi
->common
.length
= sizeof(*plogi
);
2936 plogi
->scsi_id
= tgt
->scsi_id
;
2938 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
2939 vhost
->discovery_threads
--;
2940 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2941 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2943 tgt_dbg(tgt
, "Sent port login\n");
2947 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
2948 * @evt: ibmvfc event struct
2951 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
2953 struct ibmvfc_target
*tgt
= evt
->tgt
;
2954 struct ibmvfc_host
*vhost
= evt
->vhost
;
2955 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
2956 u32 status
= rsp
->common
.status
;
2958 vhost
->discovery_threads
--;
2959 ibmvfc_free_event(evt
);
2960 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2963 case IBMVFC_MAD_SUCCESS
:
2964 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
2966 case IBMVFC_MAD_DRIVER_FAILED
:
2967 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2968 wake_up(&vhost
->work_wait_q
);
2970 case IBMVFC_MAD_FAILED
:
2972 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
2976 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
2977 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
2978 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
2979 tgt
->scsi_id
!= tgt
->new_scsi_id
)
2980 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2981 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2982 wake_up(&vhost
->work_wait_q
);
2986 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
2987 * @tgt: ibmvfc target struct
2990 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
2992 struct ibmvfc_implicit_logout
*mad
;
2993 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2994 struct ibmvfc_event
*evt
;
2996 if (vhost
->discovery_threads
>= disc_threads
)
2999 kref_get(&tgt
->kref
);
3000 evt
= ibmvfc_get_event(vhost
);
3001 vhost
->discovery_threads
++;
3002 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
3004 mad
= &evt
->iu
.implicit_logout
;
3005 memset(mad
, 0, sizeof(*mad
));
3006 mad
->common
.version
= 1;
3007 mad
->common
.opcode
= IBMVFC_IMPLICIT_LOGOUT
;
3008 mad
->common
.length
= sizeof(*mad
);
3009 mad
->old_scsi_id
= tgt
->scsi_id
;
3011 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3012 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3013 vhost
->discovery_threads
--;
3014 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3015 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3017 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3021 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3022 * @mad: ibmvfc passthru mad struct
3023 * @tgt: ibmvfc target struct
3026 * 1 if PLOGI needed / 0 if PLOGI not needed
3028 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3029 struct ibmvfc_target
*tgt
)
3031 if (memcmp(&mad
->fc_iu
.response
[2], &tgt
->ids
.port_name
,
3032 sizeof(tgt
->ids
.port_name
)))
3034 if (memcmp(&mad
->fc_iu
.response
[4], &tgt
->ids
.node_name
,
3035 sizeof(tgt
->ids
.node_name
)))
3037 if (mad
->fc_iu
.response
[6] != tgt
->scsi_id
)
3043 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3044 * @evt: ibmvfc event struct
3047 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3049 struct ibmvfc_target
*tgt
= evt
->tgt
;
3050 struct ibmvfc_host
*vhost
= evt
->vhost
;
3051 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3052 u32 status
= mad
->common
.status
;
3053 u8 fc_reason
, fc_explain
;
3055 vhost
->discovery_threads
--;
3056 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3059 case IBMVFC_MAD_SUCCESS
:
3060 tgt_dbg(tgt
, "ADISC succeeded\n");
3061 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3062 tgt
->need_login
= 1;
3064 case IBMVFC_MAD_DRIVER_FAILED
:
3066 case IBMVFC_MAD_FAILED
:
3068 tgt
->need_login
= 1;
3069 fc_reason
= (mad
->fc_iu
.response
[1] & 0x00ff0000) >> 16;
3070 fc_explain
= (mad
->fc_iu
.response
[1] & 0x0000ff00) >> 8;
3071 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3072 ibmvfc_get_cmd_error(mad
->iu
.status
, mad
->iu
.error
),
3073 mad
->iu
.status
, mad
->iu
.error
,
3074 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3075 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3079 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3080 ibmvfc_free_event(evt
);
3081 wake_up(&vhost
->work_wait_q
);
3085 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3086 * @evt: ibmvfc event struct
3089 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3091 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3093 memset(mad
, 0, sizeof(*mad
));
3094 mad
->common
.version
= 1;
3095 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
3096 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
3097 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
3098 offsetof(struct ibmvfc_passthru_mad
, iu
);
3099 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
3100 mad
->iu
.cmd_len
= sizeof(mad
->fc_iu
.payload
);
3101 mad
->iu
.rsp_len
= sizeof(mad
->fc_iu
.response
);
3102 mad
->iu
.cmd
.va
= (u64
)evt
->crq
.ioba
+
3103 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3104 offsetof(struct ibmvfc_passthru_fc_iu
, payload
);
3105 mad
->iu
.cmd
.len
= sizeof(mad
->fc_iu
.payload
);
3106 mad
->iu
.rsp
.va
= (u64
)evt
->crq
.ioba
+
3107 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3108 offsetof(struct ibmvfc_passthru_fc_iu
, response
);
3109 mad
->iu
.rsp
.len
= sizeof(mad
->fc_iu
.response
);
3113 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3114 * @tgt: ibmvfc target struct
3117 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3119 struct ibmvfc_passthru_mad
*mad
;
3120 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3121 struct ibmvfc_event
*evt
;
3123 if (vhost
->discovery_threads
>= disc_threads
)
3126 kref_get(&tgt
->kref
);
3127 evt
= ibmvfc_get_event(vhost
);
3128 vhost
->discovery_threads
++;
3129 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3132 ibmvfc_init_passthru(evt
);
3133 mad
= &evt
->iu
.passthru
;
3134 mad
->iu
.flags
= IBMVFC_FC_ELS
;
3135 mad
->iu
.scsi_id
= tgt
->scsi_id
;
3137 mad
->fc_iu
.payload
[0] = IBMVFC_ADISC
;
3138 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3139 sizeof(vhost
->login_buf
->resp
.port_name
));
3140 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3141 sizeof(vhost
->login_buf
->resp
.node_name
));
3142 mad
->fc_iu
.payload
[6] = vhost
->login_buf
->resp
.scsi_id
& 0x00ffffff;
3144 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3145 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3146 vhost
->discovery_threads
--;
3147 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3148 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3150 tgt_dbg(tgt
, "Sent ADISC\n");
3154 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3155 * @evt: ibmvfc event struct
3158 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3160 struct ibmvfc_target
*tgt
= evt
->tgt
;
3161 struct ibmvfc_host
*vhost
= evt
->vhost
;
3162 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3163 u32 status
= rsp
->common
.status
;
3165 vhost
->discovery_threads
--;
3166 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3168 case IBMVFC_MAD_SUCCESS
:
3169 tgt_dbg(tgt
, "Query Target succeeded\n");
3170 tgt
->new_scsi_id
= rsp
->scsi_id
;
3171 if (rsp
->scsi_id
!= tgt
->scsi_id
)
3172 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3174 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3176 case IBMVFC_MAD_DRIVER_FAILED
:
3178 case IBMVFC_MAD_CRQ_ERROR
:
3179 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3181 case IBMVFC_MAD_FAILED
:
3183 tgt_err(tgt
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3184 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3185 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3186 ibmvfc_get_gs_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3188 if ((rsp
->status
& IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3189 rsp
->error
== IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3190 rsp
->fc_explain
== IBMVFC_PORT_NAME_NOT_REG
)
3191 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3192 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3193 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3195 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3199 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3200 ibmvfc_free_event(evt
);
3201 wake_up(&vhost
->work_wait_q
);
3205 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3206 * @tgt: ibmvfc target struct
3209 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3211 struct ibmvfc_query_tgt
*query_tgt
;
3212 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3213 struct ibmvfc_event
*evt
;
3215 if (vhost
->discovery_threads
>= disc_threads
)
3218 kref_get(&tgt
->kref
);
3219 evt
= ibmvfc_get_event(vhost
);
3220 vhost
->discovery_threads
++;
3222 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3223 query_tgt
= &evt
->iu
.query_tgt
;
3224 memset(query_tgt
, 0, sizeof(*query_tgt
));
3225 query_tgt
->common
.version
= 1;
3226 query_tgt
->common
.opcode
= IBMVFC_QUERY_TARGET
;
3227 query_tgt
->common
.length
= sizeof(*query_tgt
);
3228 query_tgt
->wwpn
= tgt
->ids
.port_name
;
3230 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3231 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3232 vhost
->discovery_threads
--;
3233 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3234 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3236 tgt_dbg(tgt
, "Sent Query Target\n");
3240 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3241 * @vhost: ibmvfc host struct
3242 * @scsi_id: SCSI ID to allocate target for
3245 * 0 on success / other on failure
3247 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3249 struct ibmvfc_target
*tgt
;
3250 unsigned long flags
;
3252 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3253 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3254 if (tgt
->scsi_id
== scsi_id
) {
3255 if (tgt
->need_login
)
3256 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3260 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3262 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_KERNEL
);
3264 dev_err(vhost
->dev
, "Target allocation failure for scsi id %08llx\n",
3269 tgt
->scsi_id
= scsi_id
;
3270 tgt
->new_scsi_id
= scsi_id
;
3272 tgt
->need_login
= 1;
3273 kref_init(&tgt
->kref
);
3274 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3275 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3276 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3279 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3284 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3285 * @vhost: ibmvfc host struct
3288 * 0 on success / other on failure
3290 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3294 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3295 rc
= ibmvfc_alloc_target(vhost
,
3296 vhost
->disc_buf
->scsi_id
[i
] & IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3302 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3303 * @evt: ibmvfc event struct
3306 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3308 struct ibmvfc_host
*vhost
= evt
->vhost
;
3309 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3310 u32 mad_status
= rsp
->common
.status
;
3312 switch (mad_status
) {
3313 case IBMVFC_MAD_SUCCESS
:
3314 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3315 vhost
->num_targets
= rsp
->num_written
;
3316 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3318 case IBMVFC_MAD_FAILED
:
3319 dev_err(vhost
->dev
, "Discover Targets failed: %s (%x:%x)\n",
3320 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3321 ibmvfc_retry_host_init(vhost
);
3323 case IBMVFC_MAD_DRIVER_FAILED
:
3326 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3327 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3331 ibmvfc_free_event(evt
);
3332 wake_up(&vhost
->work_wait_q
);
3336 * ibmvfc_discover_targets - Send Discover Targets MAD
3337 * @vhost: ibmvfc host struct
3340 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3342 struct ibmvfc_discover_targets
*mad
;
3343 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3345 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3346 mad
= &evt
->iu
.discover_targets
;
3347 memset(mad
, 0, sizeof(*mad
));
3348 mad
->common
.version
= 1;
3349 mad
->common
.opcode
= IBMVFC_DISC_TARGETS
;
3350 mad
->common
.length
= sizeof(*mad
);
3351 mad
->bufflen
= vhost
->disc_buf_sz
;
3352 mad
->buffer
.va
= vhost
->disc_buf_dma
;
3353 mad
->buffer
.len
= vhost
->disc_buf_sz
;
3354 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3356 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3357 ibmvfc_dbg(vhost
, "Sent discover targets\n");
3359 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3363 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3364 * @evt: ibmvfc event struct
3367 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
3369 struct ibmvfc_host
*vhost
= evt
->vhost
;
3370 u32 mad_status
= evt
->xfer_iu
->npiv_login
.common
.status
;
3371 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
3372 unsigned int npiv_max_sectors
;
3374 switch (mad_status
) {
3375 case IBMVFC_MAD_SUCCESS
:
3376 ibmvfc_free_event(evt
);
3378 case IBMVFC_MAD_FAILED
:
3379 dev_err(vhost
->dev
, "NPIV Login failed: %s (%x:%x)\n",
3380 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3381 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3382 ibmvfc_retry_host_init(vhost
);
3384 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3385 ibmvfc_free_event(evt
);
3387 case IBMVFC_MAD_CRQ_ERROR
:
3388 ibmvfc_retry_host_init(vhost
);
3389 case IBMVFC_MAD_DRIVER_FAILED
:
3390 ibmvfc_free_event(evt
);
3393 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
3394 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3395 ibmvfc_free_event(evt
);
3399 vhost
->client_migrated
= 0;
3401 if (!(rsp
->flags
& IBMVFC_NATIVE_FC
)) {
3402 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
3404 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3405 wake_up(&vhost
->work_wait_q
);
3409 if (rsp
->max_cmds
<= IBMVFC_NUM_INTERNAL_REQ
) {
3410 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
3412 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3413 wake_up(&vhost
->work_wait_q
);
3417 npiv_max_sectors
= min((uint
)(rsp
->max_dma_len
>> 9), IBMVFC_MAX_SECTORS
);
3418 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
3419 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
3420 rsp
->drc_name
, npiv_max_sectors
);
3422 fc_host_fabric_name(vhost
->host
) = rsp
->node_name
;
3423 fc_host_node_name(vhost
->host
) = rsp
->node_name
;
3424 fc_host_port_name(vhost
->host
) = rsp
->port_name
;
3425 fc_host_port_id(vhost
->host
) = rsp
->scsi_id
;
3426 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
3427 fc_host_supported_classes(vhost
->host
) = 0;
3428 if (rsp
->service_parms
.class1_parms
[0] & 0x80000000)
3429 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
3430 if (rsp
->service_parms
.class2_parms
[0] & 0x80000000)
3431 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
3432 if (rsp
->service_parms
.class3_parms
[0] & 0x80000000)
3433 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
3434 fc_host_maxframe_size(vhost
->host
) =
3435 rsp
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3437 vhost
->host
->can_queue
= rsp
->max_cmds
- IBMVFC_NUM_INTERNAL_REQ
;
3438 vhost
->host
->max_sectors
= npiv_max_sectors
;
3439 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3440 wake_up(&vhost
->work_wait_q
);
3444 * ibmvfc_npiv_login - Sends NPIV login
3445 * @vhost: ibmvfc host struct
3448 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
3450 struct ibmvfc_npiv_login_mad
*mad
;
3451 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3453 ibmvfc_gather_partition_info(vhost
);
3454 ibmvfc_set_login_info(vhost
);
3455 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
3457 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
3458 mad
= &evt
->iu
.npiv_login
;
3459 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
3460 mad
->common
.version
= 1;
3461 mad
->common
.opcode
= IBMVFC_NPIV_LOGIN
;
3462 mad
->common
.length
= sizeof(struct ibmvfc_npiv_login_mad
);
3463 mad
->buffer
.va
= vhost
->login_buf_dma
;
3464 mad
->buffer
.len
= sizeof(*vhost
->login_buf
);
3466 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3468 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3469 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
3471 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3475 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3476 * @vhost: ibmvfc host struct
3479 * 1 if work to do / 0 if not
3481 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
3483 struct ibmvfc_target
*tgt
;
3485 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3486 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
3487 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
3495 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3496 * @vhost: ibmvfc host struct
3499 * 1 if work to do / 0 if not
3501 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
3503 struct ibmvfc_target
*tgt
;
3505 if (kthread_should_stop())
3507 switch (vhost
->action
) {
3508 case IBMVFC_HOST_ACTION_NONE
:
3509 case IBMVFC_HOST_ACTION_INIT_WAIT
:
3511 case IBMVFC_HOST_ACTION_TGT_INIT
:
3512 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
3513 if (vhost
->discovery_threads
== disc_threads
)
3515 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3516 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
3518 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3519 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
3522 case IBMVFC_HOST_ACTION_INIT
:
3523 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
3524 case IBMVFC_HOST_ACTION_TGT_ADD
:
3525 case IBMVFC_HOST_ACTION_TGT_DEL
:
3526 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
3527 case IBMVFC_HOST_ACTION_QUERY
:
3536 * ibmvfc_work_to_do - Is there task level work to do?
3537 * @vhost: ibmvfc host struct
3540 * 1 if work to do / 0 if not
3542 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
3544 unsigned long flags
;
3547 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3548 rc
= __ibmvfc_work_to_do(vhost
);
3549 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3554 * ibmvfc_log_ae - Log async events if necessary
3555 * @vhost: ibmvfc host struct
3556 * @events: events to log
3559 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
3561 if (events
& IBMVFC_AE_RSCN
)
3562 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
3563 if ((events
& IBMVFC_AE_LINKDOWN
) &&
3564 vhost
->state
>= IBMVFC_HALTED
)
3565 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
3566 if ((events
& IBMVFC_AE_LINKUP
) &&
3567 vhost
->state
== IBMVFC_INITIALIZING
)
3568 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
3572 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3573 * @tgt: ibmvfc target struct
3576 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
3578 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3579 struct fc_rport
*rport
;
3580 unsigned long flags
;
3582 tgt_dbg(tgt
, "Adding rport\n");
3583 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
3584 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3586 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3588 tgt_dbg(tgt
, "rport add succeeded\n");
3589 rport
->maxframe_size
= tgt
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3590 rport
->supported_classes
= 0;
3591 tgt
->target_id
= rport
->scsi_target_id
;
3592 if (tgt
->service_parms
.class1_parms
[0] & 0x80000000)
3593 rport
->supported_classes
|= FC_COS_CLASS1
;
3594 if (tgt
->service_parms
.class2_parms
[0] & 0x80000000)
3595 rport
->supported_classes
|= FC_COS_CLASS2
;
3596 if (tgt
->service_parms
.class3_parms
[0] & 0x80000000)
3597 rport
->supported_classes
|= FC_COS_CLASS3
;
3599 tgt_dbg(tgt
, "rport add failed\n");
3600 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3604 * ibmvfc_do_work - Do task level work
3605 * @vhost: ibmvfc host struct
3608 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
3610 struct ibmvfc_target
*tgt
;
3611 unsigned long flags
;
3612 struct fc_rport
*rport
;
3614 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
3615 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3616 vhost
->events_to_log
= 0;
3617 switch (vhost
->action
) {
3618 case IBMVFC_HOST_ACTION_NONE
:
3619 case IBMVFC_HOST_ACTION_INIT_WAIT
:
3621 case IBMVFC_HOST_ACTION_INIT
:
3622 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
3623 if (vhost
->delay_init
) {
3624 vhost
->delay_init
= 0;
3625 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3629 vhost
->job_step(vhost
);
3631 case IBMVFC_HOST_ACTION_QUERY
:
3632 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3633 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
3634 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
3636 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
3637 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3638 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
3644 if (!ibmvfc_dev_init_to_do(vhost
))
3645 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
3647 case IBMVFC_HOST_ACTION_TGT_DEL
:
3648 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
3649 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3650 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
3651 tgt_dbg(tgt
, "Deleting rport\n");
3654 list_del(&tgt
->queue
);
3655 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3657 fc_remote_port_delete(rport
);
3658 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3663 if (vhost
->state
== IBMVFC_INITIALIZING
) {
3664 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_DEL_FAILED
) {
3665 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
3666 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_ADD
);
3667 vhost
->init_retries
= 0;
3668 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3669 scsi_unblock_requests(vhost
->host
);
3672 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
3673 vhost
->job_step
= ibmvfc_discover_targets
;
3676 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
3677 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3678 scsi_unblock_requests(vhost
->host
);
3679 wake_up(&vhost
->init_wait_q
);
3683 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
3684 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
3685 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3686 ibmvfc_alloc_targets(vhost
);
3687 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3689 case IBMVFC_HOST_ACTION_TGT_INIT
:
3690 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3691 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
3697 if (!ibmvfc_dev_init_to_do(vhost
))
3698 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL_FAILED
);
3700 case IBMVFC_HOST_ACTION_TGT_ADD
:
3701 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3702 if (tgt
->action
== IBMVFC_TGT_ACTION_ADD_RPORT
) {
3703 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3704 ibmvfc_tgt_add_rport(tgt
);
3709 if (vhost
->reinit
&& !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
3711 scsi_block_requests(vhost
->host
);
3712 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3714 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
3715 wake_up(&vhost
->init_wait_q
);
3722 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3726 * ibmvfc_work - Do task level work
3727 * @data: ibmvfc host struct
3732 static int ibmvfc_work(void *data
)
3734 struct ibmvfc_host
*vhost
= data
;
3737 set_user_nice(current
, -20);
3740 rc
= wait_event_interruptible(vhost
->work_wait_q
,
3741 ibmvfc_work_to_do(vhost
));
3745 if (kthread_should_stop())
3748 ibmvfc_do_work(vhost
);
3751 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
3756 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3757 * @vhost: ibmvfc host struct
3759 * Allocates a page for messages, maps it for dma, and registers
3760 * the crq with the hypervisor.
3763 * zero on success / other on failure
3765 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
3767 int rc
, retrc
= -ENOMEM
;
3768 struct device
*dev
= vhost
->dev
;
3769 struct vio_dev
*vdev
= to_vio_dev(dev
);
3770 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
3773 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
3778 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
3779 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
3780 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
3782 if (dma_mapping_error(dev
, crq
->msg_token
))
3785 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
3786 crq
->msg_token
, PAGE_SIZE
);
3788 if (rc
== H_RESOURCE
)
3789 /* maybe kexecing and resource is busy. try a reset */
3790 retrc
= rc
= ibmvfc_reset_crq(vhost
);
3793 dev_warn(dev
, "Partner adapter not ready\n");
3795 dev_warn(dev
, "Error %d opening adapter\n", rc
);
3796 goto reg_crq_failed
;
3801 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
3802 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
3803 goto req_irq_failed
;
3806 if ((rc
= vio_enable_interrupts(vdev
))) {
3807 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
3808 goto req_irq_failed
;
3817 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
3818 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
3820 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
3822 free_page((unsigned long)crq
->msgs
);
3827 * ibmvfc_free_mem - Free memory for vhost
3828 * @vhost: ibmvfc host struct
3833 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
3835 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
3838 mempool_destroy(vhost
->tgt_pool
);
3839 kfree(vhost
->trace
);
3840 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
3841 vhost
->disc_buf_dma
);
3842 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
3843 vhost
->login_buf
, vhost
->login_buf_dma
);
3844 dma_pool_destroy(vhost
->sg_pool
);
3845 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
3846 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
3847 free_page((unsigned long)async_q
->msgs
);
3852 * ibmvfc_alloc_mem - Allocate memory for vhost
3853 * @vhost: ibmvfc host struct
3856 * 0 on success / non-zero on failure
3858 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
3860 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
3861 struct device
*dev
= vhost
->dev
;
3864 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
3865 if (!async_q
->msgs
) {
3866 dev_err(dev
, "Couldn't allocate async queue.\n");
3870 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
3871 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
3872 async_q
->size
* sizeof(*async_q
->msgs
),
3875 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
3876 dev_err(dev
, "Failed to map async queue\n");
3877 goto free_async_crq
;
3880 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
3881 SG_ALL
* sizeof(struct srp_direct_buf
),
3882 sizeof(struct srp_direct_buf
), 0);
3884 if (!vhost
->sg_pool
) {
3885 dev_err(dev
, "Failed to allocate sg pool\n");
3886 goto unmap_async_crq
;
3889 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
3890 &vhost
->login_buf_dma
, GFP_KERNEL
);
3892 if (!vhost
->login_buf
) {
3893 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
3897 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
3898 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
3899 &vhost
->disc_buf_dma
, GFP_KERNEL
);
3901 if (!vhost
->disc_buf
) {
3902 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
3903 goto free_login_buffer
;
3906 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
3907 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
3910 goto free_disc_buffer
;
3912 vhost
->tgt_pool
= mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
3913 sizeof(struct ibmvfc_target
));
3915 if (!vhost
->tgt_pool
) {
3916 dev_err(dev
, "Couldn't allocate target memory pool\n");
3924 kfree(vhost
->trace
);
3926 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
3927 vhost
->disc_buf_dma
);
3929 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
3930 vhost
->login_buf
, vhost
->login_buf_dma
);
3932 dma_pool_destroy(vhost
->sg_pool
);
3934 dma_unmap_single(dev
, async_q
->msg_token
,
3935 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
3937 free_page((unsigned long)async_q
->msgs
);
3944 * ibmvfc_probe - Adapter hot plug add entry point
3945 * @vdev: vio device struct
3946 * @id: vio device id struct
3949 * 0 on success / non-zero on failure
3951 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
3953 struct ibmvfc_host
*vhost
;
3954 struct Scsi_Host
*shost
;
3955 struct device
*dev
= &vdev
->dev
;
3959 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
3961 dev_err(dev
, "Couldn't allocate host data\n");
3965 shost
->transportt
= ibmvfc_transport_template
;
3966 shost
->can_queue
= max_requests
;
3967 shost
->max_lun
= max_lun
;
3968 shost
->max_id
= max_targets
;
3969 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
3970 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
3971 shost
->unique_id
= shost
->host_no
;
3973 vhost
= shost_priv(shost
);
3974 INIT_LIST_HEAD(&vhost
->sent
);
3975 INIT_LIST_HEAD(&vhost
->free
);
3976 INIT_LIST_HEAD(&vhost
->targets
);
3977 sprintf(vhost
->name
, IBMVFC_NAME
);
3978 vhost
->host
= shost
;
3980 vhost
->partition_number
= -1;
3981 vhost
->log_level
= log_level
;
3982 strcpy(vhost
->partition_name
, "UNKNOWN");
3983 init_waitqueue_head(&vhost
->work_wait_q
);
3984 init_waitqueue_head(&vhost
->init_wait_q
);
3986 if ((rc
= ibmvfc_alloc_mem(vhost
)))
3987 goto free_scsi_host
;
3989 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
3992 if (IS_ERR(vhost
->work_thread
)) {
3993 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
3994 PTR_ERR(vhost
->work_thread
));
3998 if ((rc
= ibmvfc_init_crq(vhost
))) {
3999 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
4003 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
4004 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
4008 if ((rc
= scsi_add_host(shost
, dev
)))
4009 goto release_event_pool
;
4011 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
4012 &ibmvfc_trace_attr
))) {
4013 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
4017 dev_set_drvdata(dev
, vhost
);
4018 spin_lock(&ibmvfc_driver_lock
);
4019 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4020 spin_unlock(&ibmvfc_driver_lock
);
4022 ibmvfc_send_crq_init(vhost
);
4023 scsi_scan_host(shost
);
4027 scsi_remove_host(shost
);
4029 ibmvfc_free_event_pool(vhost
);
4031 ibmvfc_release_crq_queue(vhost
);
4033 kthread_stop(vhost
->work_thread
);
4035 ibmvfc_free_mem(vhost
);
4037 scsi_host_put(shost
);
4044 * ibmvfc_remove - Adapter hot plug remove entry point
4045 * @vdev: vio device struct
4050 static int ibmvfc_remove(struct vio_dev
*vdev
)
4052 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4053 unsigned long flags
;
4056 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4057 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4058 ibmvfc_wait_while_resetting(vhost
);
4059 ibmvfc_release_crq_queue(vhost
);
4060 kthread_stop(vhost
->work_thread
);
4061 fc_remove_host(vhost
->host
);
4062 scsi_remove_host(vhost
->host
);
4064 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4065 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4066 ibmvfc_free_event_pool(vhost
);
4067 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4069 ibmvfc_free_mem(vhost
);
4070 spin_lock(&ibmvfc_driver_lock
);
4071 list_del(&vhost
->queue
);
4072 spin_unlock(&ibmvfc_driver_lock
);
4073 scsi_host_put(vhost
->host
);
4079 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4080 * @vdev: vio device struct
4083 * Number of bytes the driver will need to DMA map at the same time in
4084 * order to perform well.
4086 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4088 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4089 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4092 static struct vio_device_id ibmvfc_device_table
[] __devinitdata
= {
4093 {"fcp", "IBM,vfc-client"},
4096 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4098 static struct vio_driver ibmvfc_driver
= {
4099 .id_table
= ibmvfc_device_table
,
4100 .probe
= ibmvfc_probe
,
4101 .remove
= ibmvfc_remove
,
4102 .get_desired_dma
= ibmvfc_get_desired_dma
,
4104 .name
= IBMVFC_NAME
,
4105 .owner
= THIS_MODULE
,
4109 static struct fc_function_template ibmvfc_transport_functions
= {
4110 .show_host_fabric_name
= 1,
4111 .show_host_node_name
= 1,
4112 .show_host_port_name
= 1,
4113 .show_host_supported_classes
= 1,
4114 .show_host_port_type
= 1,
4115 .show_host_port_id
= 1,
4117 .get_host_port_state
= ibmvfc_get_host_port_state
,
4118 .show_host_port_state
= 1,
4120 .get_host_speed
= ibmvfc_get_host_speed
,
4121 .show_host_speed
= 1,
4123 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4124 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4126 .show_rport_maxframe_size
= 1,
4127 .show_rport_supported_classes
= 1,
4129 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4130 .show_rport_dev_loss_tmo
= 1,
4132 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4133 .show_starget_node_name
= 1,
4135 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4136 .show_starget_port_name
= 1,
4138 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4139 .show_starget_port_id
= 1,
4143 * ibmvfc_module_init - Initialize the ibmvfc module
4146 * 0 on success / other on failure
4148 static int __init
ibmvfc_module_init(void)
4152 if (!firmware_has_feature(FW_FEATURE_VIO
))
4155 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
4156 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
4158 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
4159 if (!ibmvfc_transport_template
)
4162 rc
= vio_register_driver(&ibmvfc_driver
);
4164 fc_release_transport(ibmvfc_transport_template
);
4169 * ibmvfc_module_exit - Teardown the ibmvfc module
4174 static void __exit
ibmvfc_module_exit(void)
4176 vio_unregister_driver(&ibmvfc_driver
);
4177 fc_release_transport(ibmvfc_transport_template
);
4180 module_init(ibmvfc_module_init
);
4181 module_exit(ibmvfc_module_exit
);