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
);
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
, 1, 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
*);
146 static void ibmvfc_npiv_logout(struct ibmvfc_host
*);
148 static const char *unknown_error
= "unknown error";
150 #ifdef CONFIG_SCSI_IBMVFC_TRACE
152 * ibmvfc_trc_start - Log a start trace entry
153 * @evt: ibmvfc event struct
156 static void ibmvfc_trc_start(struct ibmvfc_event
*evt
)
158 struct ibmvfc_host
*vhost
= evt
->vhost
;
159 struct ibmvfc_cmd
*vfc_cmd
= &evt
->iu
.cmd
;
160 struct ibmvfc_mad_common
*mad
= &evt
->iu
.mad_common
;
161 struct ibmvfc_trace_entry
*entry
;
163 entry
= &vhost
->trace
[vhost
->trace_index
++];
165 entry
->time
= jiffies
;
166 entry
->fmt
= evt
->crq
.format
;
167 entry
->type
= IBMVFC_TRC_START
;
169 switch (entry
->fmt
) {
170 case IBMVFC_CMD_FORMAT
:
171 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
172 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
173 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
174 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
175 entry
->u
.start
.xfer_len
= vfc_cmd
->iu
.xfer_len
;
177 case IBMVFC_MAD_FORMAT
:
178 entry
->op_code
= mad
->opcode
;
186 * ibmvfc_trc_end - Log an end trace entry
187 * @evt: ibmvfc event struct
190 static void ibmvfc_trc_end(struct ibmvfc_event
*evt
)
192 struct ibmvfc_host
*vhost
= evt
->vhost
;
193 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
194 struct ibmvfc_mad_common
*mad
= &evt
->xfer_iu
->mad_common
;
195 struct ibmvfc_trace_entry
*entry
= &vhost
->trace
[vhost
->trace_index
++];
198 entry
->time
= jiffies
;
199 entry
->fmt
= evt
->crq
.format
;
200 entry
->type
= IBMVFC_TRC_END
;
202 switch (entry
->fmt
) {
203 case IBMVFC_CMD_FORMAT
:
204 entry
->op_code
= vfc_cmd
->iu
.cdb
[0];
205 entry
->scsi_id
= vfc_cmd
->tgt_scsi_id
;
206 entry
->lun
= scsilun_to_int(&vfc_cmd
->iu
.lun
);
207 entry
->tmf_flags
= vfc_cmd
->iu
.tmf_flags
;
208 entry
->u
.end
.status
= vfc_cmd
->status
;
209 entry
->u
.end
.error
= vfc_cmd
->error
;
210 entry
->u
.end
.fcp_rsp_flags
= vfc_cmd
->rsp
.flags
;
211 entry
->u
.end
.rsp_code
= vfc_cmd
->rsp
.data
.info
.rsp_code
;
212 entry
->u
.end
.scsi_status
= vfc_cmd
->rsp
.scsi_status
;
214 case IBMVFC_MAD_FORMAT
:
215 entry
->op_code
= mad
->opcode
;
216 entry
->u
.end
.status
= mad
->status
;
225 #define ibmvfc_trc_start(evt) do { } while (0)
226 #define ibmvfc_trc_end(evt) do { } while (0)
230 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
231 * @status: status / error class
235 * index into cmd_status / -EINVAL on failure
237 static int ibmvfc_get_err_index(u16 status
, u16 error
)
241 for (i
= 0; i
< ARRAY_SIZE(cmd_status
); i
++)
242 if ((cmd_status
[i
].status
& status
) == cmd_status
[i
].status
&&
243 cmd_status
[i
].error
== error
)
250 * ibmvfc_get_cmd_error - Find the error description for the fcp response
251 * @status: status / error class
255 * error description string
257 static const char *ibmvfc_get_cmd_error(u16 status
, u16 error
)
259 int rc
= ibmvfc_get_err_index(status
, error
);
261 return cmd_status
[rc
].name
;
262 return unknown_error
;
266 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
267 * @vfc_cmd: ibmvfc command struct
270 * SCSI result value to return for completed command
272 static int ibmvfc_get_err_result(struct ibmvfc_cmd
*vfc_cmd
)
275 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
276 int fc_rsp_len
= rsp
->fcp_rsp_len
;
278 if ((rsp
->flags
& FCP_RSP_LEN_VALID
) &&
279 ((fc_rsp_len
&& fc_rsp_len
!= 4 && fc_rsp_len
!= 8) ||
280 rsp
->data
.info
.rsp_code
))
281 return DID_ERROR
<< 16;
283 err
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
285 return rsp
->scsi_status
| (cmd_status
[err
].result
<< 16);
286 return rsp
->scsi_status
| (DID_ERROR
<< 16);
290 * ibmvfc_retry_cmd - Determine if error status is retryable
291 * @status: status / error class
295 * 1 if error should be retried / 0 if it should not
297 static int ibmvfc_retry_cmd(u16 status
, u16 error
)
299 int rc
= ibmvfc_get_err_index(status
, error
);
302 return cmd_status
[rc
].retry
;
306 static const char *unknown_fc_explain
= "unknown fc explain";
308 static const struct {
312 { 0x00, "no additional explanation" },
313 { 0x01, "service parameter error - options" },
314 { 0x03, "service parameter error - initiator control" },
315 { 0x05, "service parameter error - recipient control" },
316 { 0x07, "service parameter error - received data field size" },
317 { 0x09, "service parameter error - concurrent seq" },
318 { 0x0B, "service parameter error - credit" },
319 { 0x0D, "invalid N_Port/F_Port_Name" },
320 { 0x0E, "invalid node/Fabric Name" },
321 { 0x0F, "invalid common service parameters" },
322 { 0x11, "invalid association header" },
323 { 0x13, "association header required" },
324 { 0x15, "invalid originator S_ID" },
325 { 0x17, "invalid OX_ID-RX-ID combination" },
326 { 0x19, "command (request) already in progress" },
327 { 0x1E, "N_Port Login requested" },
328 { 0x1F, "Invalid N_Port_ID" },
331 static const struct {
335 { 0x00, "no additional explanation" },
336 { 0x01, "port identifier not registered" },
337 { 0x02, "port name not registered" },
338 { 0x03, "node name not registered" },
339 { 0x04, "class of service not registered" },
340 { 0x06, "initial process associator not registered" },
341 { 0x07, "FC-4 TYPEs not registered" },
342 { 0x08, "symbolic port name not registered" },
343 { 0x09, "symbolic node name not registered" },
344 { 0x0A, "port type not registered" },
345 { 0xF0, "authorization exception" },
346 { 0xF1, "authentication exception" },
347 { 0xF2, "data base full" },
348 { 0xF3, "data base empty" },
349 { 0xF4, "processing request" },
350 { 0xF5, "unable to verify connection" },
351 { 0xF6, "devices not in a common zone" },
355 * ibmvfc_get_ls_explain - Return the FC Explain description text
356 * @status: FC Explain status
361 static const char *ibmvfc_get_ls_explain(u16 status
)
365 for (i
= 0; i
< ARRAY_SIZE(ls_explain
); i
++)
366 if (ls_explain
[i
].fc_explain
== status
)
367 return ls_explain
[i
].name
;
369 return unknown_fc_explain
;
373 * ibmvfc_get_gs_explain - Return the FC Explain description text
374 * @status: FC Explain status
379 static const char *ibmvfc_get_gs_explain(u16 status
)
383 for (i
= 0; i
< ARRAY_SIZE(gs_explain
); i
++)
384 if (gs_explain
[i
].fc_explain
== status
)
385 return gs_explain
[i
].name
;
387 return unknown_fc_explain
;
390 static const struct {
391 enum ibmvfc_fc_type fc_type
;
394 { IBMVFC_FABRIC_REJECT
, "fabric reject" },
395 { IBMVFC_PORT_REJECT
, "port reject" },
396 { IBMVFC_LS_REJECT
, "ELS reject" },
397 { IBMVFC_FABRIC_BUSY
, "fabric busy" },
398 { IBMVFC_PORT_BUSY
, "port busy" },
399 { IBMVFC_BASIC_REJECT
, "basic reject" },
402 static const char *unknown_fc_type
= "unknown fc type";
405 * ibmvfc_get_fc_type - Return the FC Type description text
406 * @status: FC Type error status
411 static const char *ibmvfc_get_fc_type(u16 status
)
415 for (i
= 0; i
< ARRAY_SIZE(fc_type
); i
++)
416 if (fc_type
[i
].fc_type
== status
)
417 return fc_type
[i
].name
;
419 return unknown_fc_type
;
423 * ibmvfc_set_tgt_action - Set the next init action for the target
424 * @tgt: ibmvfc target struct
425 * @action: action to perform
428 static void ibmvfc_set_tgt_action(struct ibmvfc_target
*tgt
,
429 enum ibmvfc_target_action action
)
431 switch (tgt
->action
) {
432 case IBMVFC_TGT_ACTION_DEL_RPORT
:
435 if (action
== IBMVFC_TGT_ACTION_DEL_RPORT
)
437 tgt
->action
= action
;
443 * ibmvfc_set_host_state - Set the state for the host
444 * @vhost: ibmvfc host struct
445 * @state: state to set host to
448 * 0 if state changed / non-zero if not changed
450 static int ibmvfc_set_host_state(struct ibmvfc_host
*vhost
,
451 enum ibmvfc_host_state state
)
455 switch (vhost
->state
) {
456 case IBMVFC_HOST_OFFLINE
:
460 vhost
->state
= state
;
468 * ibmvfc_set_host_action - Set the next init action for the host
469 * @vhost: ibmvfc host struct
470 * @action: action to perform
473 static void ibmvfc_set_host_action(struct ibmvfc_host
*vhost
,
474 enum ibmvfc_host_action action
)
477 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
478 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
)
479 vhost
->action
= action
;
481 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
482 if (vhost
->action
== IBMVFC_HOST_ACTION_LOGO
)
483 vhost
->action
= action
;
485 case IBMVFC_HOST_ACTION_INIT_WAIT
:
486 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT
)
487 vhost
->action
= action
;
489 case IBMVFC_HOST_ACTION_QUERY
:
490 switch (vhost
->action
) {
491 case IBMVFC_HOST_ACTION_INIT_WAIT
:
492 case IBMVFC_HOST_ACTION_NONE
:
493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
494 vhost
->action
= action
;
500 case IBMVFC_HOST_ACTION_TGT_INIT
:
501 if (vhost
->action
== IBMVFC_HOST_ACTION_ALLOC_TGTS
)
502 vhost
->action
= action
;
504 case IBMVFC_HOST_ACTION_LOGO
:
505 case IBMVFC_HOST_ACTION_INIT
:
506 case IBMVFC_HOST_ACTION_TGT_DEL
:
507 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
509 case IBMVFC_HOST_ACTION_NONE
:
511 vhost
->action
= action
;
517 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
518 * @vhost: ibmvfc host struct
523 static void ibmvfc_reinit_host(struct ibmvfc_host
*vhost
)
525 if (vhost
->action
== IBMVFC_HOST_ACTION_NONE
) {
526 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
527 scsi_block_requests(vhost
->host
);
528 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
533 wake_up(&vhost
->work_wait_q
);
537 * ibmvfc_link_down - Handle a link down event from the adapter
538 * @vhost: ibmvfc host struct
539 * @state: ibmvfc host state to enter
542 static void ibmvfc_link_down(struct ibmvfc_host
*vhost
,
543 enum ibmvfc_host_state state
)
545 struct ibmvfc_target
*tgt
;
548 scsi_block_requests(vhost
->host
);
549 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
550 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
551 ibmvfc_set_host_state(vhost
, state
);
552 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
553 vhost
->events_to_log
|= IBMVFC_AE_LINKDOWN
;
554 wake_up(&vhost
->work_wait_q
);
559 * ibmvfc_init_host - Start host initialization
560 * @vhost: ibmvfc host struct
561 * @relogin: is this a re-login?
566 static void ibmvfc_init_host(struct ibmvfc_host
*vhost
, int relogin
)
568 struct ibmvfc_target
*tgt
;
570 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
571 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
573 "Host initialization retries exceeded. Taking adapter offline\n");
574 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
579 if (!ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
581 memset(vhost
->async_crq
.msgs
, 0, PAGE_SIZE
);
582 vhost
->async_crq
.cur
= 0;
585 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
586 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
587 scsi_block_requests(vhost
->host
);
588 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
589 vhost
->job_step
= ibmvfc_npiv_login
;
590 wake_up(&vhost
->work_wait_q
);
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
601 * 0 on success / other on failure
603 static int ibmvfc_send_crq(struct ibmvfc_host
*vhost
, u64 word1
, u64 word2
)
605 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
606 return plpar_hcall_norets(H_SEND_CRQ
, vdev
->unit_address
, word1
, word2
);
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
614 * 0 on success / other on failure
616 static int ibmvfc_send_crq_init(struct ibmvfc_host
*vhost
)
618 ibmvfc_dbg(vhost
, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost
, 0xC001000000000000LL
, 0);
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
627 * 0 on success / other on failure
629 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host
*vhost
)
631 ibmvfc_dbg(vhost
, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost
, 0xC002000000000000LL
, 0);
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
642 static void ibmvfc_release_crq_queue(struct ibmvfc_host
*vhost
)
645 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
646 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
648 ibmvfc_dbg(vhost
, "Releasing CRQ\n");
649 free_irq(vdev
->irq
, vhost
);
650 tasklet_kill(&vhost
->tasklet
);
652 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
653 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
655 vhost
->state
= IBMVFC_NO_CRQ
;
656 vhost
->logged_in
= 0;
657 dma_unmap_single(vhost
->dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
658 free_page((unsigned long)crq
->msgs
);
662 * ibmvfc_reenable_crq_queue - reenables the CRQ
663 * @vhost: ibmvfc host struct
666 * 0 on success / other on failure
668 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host
*vhost
)
671 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
673 /* Re-enable the CRQ */
675 rc
= plpar_hcall_norets(H_ENABLE_CRQ
, vdev
->unit_address
);
676 } while (rc
== H_IN_PROGRESS
|| rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
679 dev_err(vhost
->dev
, "Error enabling adapter (rc=%d)\n", rc
);
685 * ibmvfc_reset_crq - resets a crq after a failure
686 * @vhost: ibmvfc host struct
689 * 0 on success / other on failure
691 static int ibmvfc_reset_crq(struct ibmvfc_host
*vhost
)
694 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
695 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
699 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
700 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
702 vhost
->state
= IBMVFC_NO_CRQ
;
703 vhost
->logged_in
= 0;
704 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
706 /* Clean out the queue */
707 memset(crq
->msgs
, 0, PAGE_SIZE
);
710 /* And re-open it again */
711 rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
712 crq
->msg_token
, PAGE_SIZE
);
715 /* Adapter is good, but other end is not ready */
716 dev_warn(vhost
->dev
, "Partner adapter not ready\n");
718 dev_warn(vhost
->dev
, "Couldn't register crq (rc=%d)\n", rc
);
724 * ibmvfc_valid_event - Determines if event is valid.
725 * @pool: event_pool that contains the event
726 * @evt: ibmvfc event to be checked for validity
729 * 1 if event is valid / 0 if event is not valid
731 static int ibmvfc_valid_event(struct ibmvfc_event_pool
*pool
,
732 struct ibmvfc_event
*evt
)
734 int index
= evt
- pool
->events
;
735 if (index
< 0 || index
>= pool
->size
) /* outside of bounds */
737 if (evt
!= pool
->events
+ index
) /* unaligned */
743 * ibmvfc_free_event - Free the specified event
744 * @evt: ibmvfc_event to be freed
747 static void ibmvfc_free_event(struct ibmvfc_event
*evt
)
749 struct ibmvfc_host
*vhost
= evt
->vhost
;
750 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
752 BUG_ON(!ibmvfc_valid_event(pool
, evt
));
753 BUG_ON(atomic_inc_return(&evt
->free
) != 1);
754 list_add_tail(&evt
->queue
, &vhost
->free
);
758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
759 * @evt: ibmvfc event struct
761 * This function does not setup any error status, that must be done
762 * before this function gets called.
764 static void ibmvfc_scsi_eh_done(struct ibmvfc_event
*evt
)
766 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
769 scsi_dma_unmap(cmnd
);
770 cmnd
->scsi_done(cmnd
);
774 complete(evt
->eh_comp
);
776 ibmvfc_free_event(evt
);
780 * ibmvfc_fail_request - Fail request with specified error code
781 * @evt: ibmvfc event struct
782 * @error_code: error code to fail request with
787 static void ibmvfc_fail_request(struct ibmvfc_event
*evt
, int error_code
)
790 evt
->cmnd
->result
= (error_code
<< 16);
791 evt
->done
= ibmvfc_scsi_eh_done
;
793 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_DRIVER_FAILED
;
795 list_del(&evt
->queue
);
796 del_timer(&evt
->timer
);
802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
803 * @vhost: ibmvfc host struct
804 * @error_code: error code to fail requests with
809 static void ibmvfc_purge_requests(struct ibmvfc_host
*vhost
, int error_code
)
811 struct ibmvfc_event
*evt
, *pos
;
813 ibmvfc_dbg(vhost
, "Purging all requests\n");
814 list_for_each_entry_safe(evt
, pos
, &vhost
->sent
, queue
)
815 ibmvfc_fail_request(evt
, error_code
);
819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
820 * @vhost: struct ibmvfc host to reset
822 static void ibmvfc_hard_reset_host(struct ibmvfc_host
*vhost
)
826 scsi_block_requests(vhost
->host
);
827 ibmvfc_purge_requests(vhost
, DID_ERROR
);
828 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
829 (rc
= ibmvfc_send_crq_init(vhost
)) ||
830 (rc
= vio_enable_interrupts(to_vio_dev(vhost
->dev
)))) {
831 dev_err(vhost
->dev
, "Error after reset rc=%d\n", rc
);
832 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
834 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
839 * @vhost: struct ibmvfc host to reset
841 static void __ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
843 if (vhost
->logged_in
&& vhost
->action
!= IBMVFC_HOST_ACTION_LOGO_WAIT
&&
844 !ibmvfc_set_host_state(vhost
, IBMVFC_INITIALIZING
)) {
845 scsi_block_requests(vhost
->host
);
846 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO
);
847 vhost
->job_step
= ibmvfc_npiv_logout
;
848 wake_up(&vhost
->work_wait_q
);
850 ibmvfc_hard_reset_host(vhost
);
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
857 static void ibmvfc_reset_host(struct ibmvfc_host
*vhost
)
861 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
862 __ibmvfc_reset_host(vhost
);
863 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
870 * Returns: 1 if init will be retried / 0 if not
873 static int ibmvfc_retry_host_init(struct ibmvfc_host
*vhost
)
877 if (vhost
->action
== IBMVFC_HOST_ACTION_INIT_WAIT
) {
878 vhost
->delay_init
= 1;
879 if (++vhost
->init_retries
> IBMVFC_MAX_HOST_INIT_RETRIES
) {
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
883 } else if (vhost
->init_retries
== IBMVFC_MAX_HOST_INIT_RETRIES
)
884 __ibmvfc_reset_host(vhost
);
886 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
891 wake_up(&vhost
->work_wait_q
);
896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
897 * @starget: scsi target struct
900 * ibmvfc_target struct / NULL if not found
902 static struct ibmvfc_target
*__ibmvfc_get_target(struct scsi_target
*starget
)
904 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
905 struct ibmvfc_host
*vhost
= shost_priv(shost
);
906 struct ibmvfc_target
*tgt
;
908 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
909 if (tgt
->target_id
== starget
->id
) {
910 kref_get(&tgt
->kref
);
917 * ibmvfc_get_target - Find the specified scsi_target
918 * @starget: scsi target struct
921 * ibmvfc_target struct / NULL if not found
923 static struct ibmvfc_target
*ibmvfc_get_target(struct scsi_target
*starget
)
925 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
926 struct ibmvfc_target
*tgt
;
929 spin_lock_irqsave(shost
->host_lock
, flags
);
930 tgt
= __ibmvfc_get_target(starget
);
931 spin_unlock_irqrestore(shost
->host_lock
, flags
);
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
942 static void ibmvfc_get_host_speed(struct Scsi_Host
*shost
)
944 struct ibmvfc_host
*vhost
= shost_priv(shost
);
947 spin_lock_irqsave(shost
->host_lock
, flags
);
948 if (vhost
->state
== IBMVFC_ACTIVE
) {
949 switch (vhost
->login_buf
->resp
.link_speed
/ 100) {
951 fc_host_speed(shost
) = FC_PORTSPEED_1GBIT
;
954 fc_host_speed(shost
) = FC_PORTSPEED_2GBIT
;
957 fc_host_speed(shost
) = FC_PORTSPEED_4GBIT
;
960 fc_host_speed(shost
) = FC_PORTSPEED_8GBIT
;
963 fc_host_speed(shost
) = FC_PORTSPEED_10GBIT
;
966 fc_host_speed(shost
) = FC_PORTSPEED_16GBIT
;
969 ibmvfc_log(vhost
, 3, "Unknown port speed: %lld Gbit\n",
970 vhost
->login_buf
->resp
.link_speed
/ 100);
971 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
975 fc_host_speed(shost
) = FC_PORTSPEED_UNKNOWN
;
976 spin_unlock_irqrestore(shost
->host_lock
, flags
);
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
986 static void ibmvfc_get_host_port_state(struct Scsi_Host
*shost
)
988 struct ibmvfc_host
*vhost
= shost_priv(shost
);
991 spin_lock_irqsave(shost
->host_lock
, flags
);
992 switch (vhost
->state
) {
993 case IBMVFC_INITIALIZING
:
995 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
997 case IBMVFC_LINK_DOWN
:
998 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
1000 case IBMVFC_LINK_DEAD
:
1001 case IBMVFC_HOST_OFFLINE
:
1002 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
1005 fc_host_port_state(shost
) = FC_PORTSTATE_BLOCKED
;
1008 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1011 ibmvfc_log(vhost
, 3, "Unknown port state: %d\n", vhost
->state
);
1012 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
1015 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1026 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
1029 rport
->dev_loss_tmo
= timeout
;
1031 rport
->dev_loss_tmo
= 1;
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1039 static void ibmvfc_release_tgt(struct kref
*kref
)
1041 struct ibmvfc_target
*tgt
= container_of(kref
, struct ibmvfc_target
, kref
);
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1052 static void ibmvfc_get_starget_node_name(struct scsi_target
*starget
)
1054 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1055 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.node_name
: 0;
1057 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1067 static void ibmvfc_get_starget_port_name(struct scsi_target
*starget
)
1069 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1070 fc_starget_port_name(starget
) = tgt
? tgt
->ids
.port_name
: 0;
1072 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1082 static void ibmvfc_get_starget_port_id(struct scsi_target
*starget
)
1084 struct ibmvfc_target
*tgt
= ibmvfc_get_target(starget
);
1085 fc_starget_port_id(starget
) = tgt
? tgt
->scsi_id
: -1;
1087 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1095 * 0 on success / other on failure
1097 static int ibmvfc_wait_while_resetting(struct ibmvfc_host
*vhost
)
1099 long timeout
= wait_event_timeout(vhost
->init_wait_q
,
1100 ((vhost
->state
== IBMVFC_ACTIVE
||
1101 vhost
->state
== IBMVFC_HOST_OFFLINE
||
1102 vhost
->state
== IBMVFC_LINK_DEAD
) &&
1103 vhost
->action
== IBMVFC_HOST_ACTION_NONE
),
1104 (init_timeout
* HZ
));
1106 return timeout
? 0 : -EIO
;
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1114 * 0 on success / other on failure
1116 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host
*shost
)
1118 struct ibmvfc_host
*vhost
= shost_priv(shost
);
1120 dev_err(vhost
->dev
, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost
);
1122 return ibmvfc_wait_while_resetting(vhost
);
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1131 static void ibmvfc_gather_partition_info(struct ibmvfc_host
*vhost
)
1133 struct device_node
*rootdn
;
1135 const unsigned int *num
;
1137 rootdn
= of_find_node_by_path("/");
1141 name
= of_get_property(rootdn
, "ibm,partition-name", NULL
);
1143 strncpy(vhost
->partition_name
, name
, sizeof(vhost
->partition_name
));
1144 num
= of_get_property(rootdn
, "ibm,partition-no", NULL
);
1146 vhost
->partition_number
= *num
;
1147 of_node_put(rootdn
);
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1157 static void ibmvfc_set_login_info(struct ibmvfc_host
*vhost
)
1159 struct ibmvfc_npiv_login
*login_info
= &vhost
->login_info
;
1160 struct device_node
*of_node
= vhost
->dev
->archdata
.of_node
;
1161 const char *location
;
1163 memset(login_info
, 0, sizeof(*login_info
));
1165 login_info
->ostype
= IBMVFC_OS_LINUX
;
1166 login_info
->max_dma_len
= IBMVFC_MAX_SECTORS
<< 9;
1167 login_info
->max_payload
= sizeof(struct ibmvfc_fcp_cmd_iu
);
1168 login_info
->max_response
= sizeof(struct ibmvfc_fcp_rsp
);
1169 login_info
->partition_num
= vhost
->partition_number
;
1170 login_info
->vfc_frame_version
= 1;
1171 login_info
->fcp_version
= 3;
1172 login_info
->flags
= IBMVFC_FLUSH_ON_HALT
;
1173 if (vhost
->client_migrated
)
1174 login_info
->flags
|= IBMVFC_CLIENT_MIGRATED
;
1176 login_info
->max_cmds
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1177 login_info
->capabilities
= IBMVFC_CAN_MIGRATE
;
1178 login_info
->async
.va
= vhost
->async_crq
.msg_token
;
1179 login_info
->async
.len
= vhost
->async_crq
.size
* sizeof(*vhost
->async_crq
.msgs
);
1180 strncpy(login_info
->partition_name
, vhost
->partition_name
, IBMVFC_MAX_NAME
);
1181 strncpy(login_info
->device_name
,
1182 dev_name(&vhost
->host
->shost_gendev
), IBMVFC_MAX_NAME
);
1184 location
= of_get_property(of_node
, "ibm,loc-code", NULL
);
1185 location
= location
? location
: dev_name(vhost
->dev
);
1186 strncpy(login_info
->drc_name
, location
, IBMVFC_MAX_NAME
);
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1193 * Returns zero on success.
1195 static int ibmvfc_init_event_pool(struct ibmvfc_host
*vhost
)
1198 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1201 pool
->size
= max_requests
+ IBMVFC_NUM_INTERNAL_REQ
;
1202 pool
->events
= kcalloc(pool
->size
, sizeof(*pool
->events
), GFP_KERNEL
);
1206 pool
->iu_storage
= dma_alloc_coherent(vhost
->dev
,
1207 pool
->size
* sizeof(*pool
->iu_storage
),
1208 &pool
->iu_token
, 0);
1210 if (!pool
->iu_storage
) {
1211 kfree(pool
->events
);
1215 for (i
= 0; i
< pool
->size
; ++i
) {
1216 struct ibmvfc_event
*evt
= &pool
->events
[i
];
1217 atomic_set(&evt
->free
, 1);
1218 evt
->crq
.valid
= 0x80;
1219 evt
->crq
.ioba
= pool
->iu_token
+ (sizeof(*evt
->xfer_iu
) * i
);
1220 evt
->xfer_iu
= pool
->iu_storage
+ i
;
1222 evt
->ext_list
= NULL
;
1223 list_add_tail(&evt
->queue
, &vhost
->free
);
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1235 static void ibmvfc_free_event_pool(struct ibmvfc_host
*vhost
)
1238 struct ibmvfc_event_pool
*pool
= &vhost
->pool
;
1241 for (i
= 0; i
< pool
->size
; ++i
) {
1242 list_del(&pool
->events
[i
].queue
);
1243 BUG_ON(atomic_read(&pool
->events
[i
].free
) != 1);
1244 if (pool
->events
[i
].ext_list
)
1245 dma_pool_free(vhost
->sg_pool
,
1246 pool
->events
[i
].ext_list
,
1247 pool
->events
[i
].ext_list_token
);
1250 kfree(pool
->events
);
1251 dma_free_coherent(vhost
->dev
,
1252 pool
->size
* sizeof(*pool
->iu_storage
),
1253 pool
->iu_storage
, pool
->iu_token
);
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1261 * Returns a free event from the pool.
1263 static struct ibmvfc_event
*ibmvfc_get_event(struct ibmvfc_host
*vhost
)
1265 struct ibmvfc_event
*evt
;
1267 BUG_ON(list_empty(&vhost
->free
));
1268 evt
= list_entry(vhost
->free
.next
, struct ibmvfc_event
, queue
);
1269 atomic_set(&evt
->free
, 0);
1270 list_del(&evt
->queue
);
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1281 static void ibmvfc_init_event(struct ibmvfc_event
*evt
,
1282 void (*done
) (struct ibmvfc_event
*), u8 format
)
1285 evt
->sync_iu
= NULL
;
1286 evt
->crq
.format
= format
;
1288 evt
->eh_comp
= NULL
;
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1297 static void ibmvfc_map_sg_list(struct scsi_cmnd
*scmd
, int nseg
,
1298 struct srp_direct_buf
*md
)
1301 struct scatterlist
*sg
;
1303 scsi_for_each_sg(scmd
, sg
, nseg
, i
) {
1304 md
[i
].va
= sg_dma_address(sg
);
1305 md
[i
].len
= sg_dma_len(sg
);
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1312 * @scmd: Scsi_Cmnd with the scatterlist
1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1318 * 0 on success / non-zero on failure
1320 static int ibmvfc_map_sg_data(struct scsi_cmnd
*scmd
,
1321 struct ibmvfc_event
*evt
,
1322 struct ibmvfc_cmd
*vfc_cmd
, struct device
*dev
)
1326 struct srp_direct_buf
*data
= &vfc_cmd
->ioba
;
1327 struct ibmvfc_host
*vhost
= dev_get_drvdata(dev
);
1329 sg_mapped
= scsi_dma_map(scmd
);
1331 vfc_cmd
->flags
|= IBMVFC_NO_MEM_DESC
;
1333 } else if (unlikely(sg_mapped
< 0)) {
1334 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1335 scmd_printk(KERN_ERR
, scmd
, "Failed to map DMA buffer for command\n");
1339 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1340 vfc_cmd
->flags
|= IBMVFC_WRITE
;
1341 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_WRDATA
;
1343 vfc_cmd
->flags
|= IBMVFC_READ
;
1344 vfc_cmd
->iu
.add_cdb_len
|= IBMVFC_RDDATA
;
1347 if (sg_mapped
== 1) {
1348 ibmvfc_map_sg_list(scmd
, sg_mapped
, data
);
1352 vfc_cmd
->flags
|= IBMVFC_SCATTERLIST
;
1354 if (!evt
->ext_list
) {
1355 evt
->ext_list
= dma_pool_alloc(vhost
->sg_pool
, GFP_ATOMIC
,
1356 &evt
->ext_list_token
);
1358 if (!evt
->ext_list
) {
1359 scsi_dma_unmap(scmd
);
1360 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1361 scmd_printk(KERN_ERR
, scmd
, "Can't allocate memory for scatterlist\n");
1366 ibmvfc_map_sg_list(scmd
, sg_mapped
, evt
->ext_list
);
1368 data
->va
= evt
->ext_list_token
;
1369 data
->len
= sg_mapped
* sizeof(struct srp_direct_buf
);
1375 * ibmvfc_timeout - Internal command timeout handler
1376 * @evt: struct ibmvfc_event that timed out
1378 * Called when an internally generated command times out
1380 static void ibmvfc_timeout(struct ibmvfc_event
*evt
)
1382 struct ibmvfc_host
*vhost
= evt
->vhost
;
1383 dev_err(vhost
->dev
, "Command timed out (%p). Resetting connection\n", evt
);
1384 ibmvfc_reset_host(vhost
);
1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1389 * @evt: event to be sent
1390 * @vhost: ibmvfc host struct
1391 * @timeout: timeout in seconds - 0 means do not time command
1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1395 static int ibmvfc_send_event(struct ibmvfc_event
*evt
,
1396 struct ibmvfc_host
*vhost
, unsigned long timeout
)
1398 u64
*crq_as_u64
= (u64
*) &evt
->crq
;
1401 /* Copy the IU into the transfer area */
1402 *evt
->xfer_iu
= evt
->iu
;
1403 if (evt
->crq
.format
== IBMVFC_CMD_FORMAT
)
1404 evt
->xfer_iu
->cmd
.tag
= (u64
)evt
;
1405 else if (evt
->crq
.format
== IBMVFC_MAD_FORMAT
)
1406 evt
->xfer_iu
->mad_common
.tag
= (u64
)evt
;
1410 list_add_tail(&evt
->queue
, &vhost
->sent
);
1411 init_timer(&evt
->timer
);
1414 evt
->timer
.data
= (unsigned long) evt
;
1415 evt
->timer
.expires
= jiffies
+ (timeout
* HZ
);
1416 evt
->timer
.function
= (void (*)(unsigned long))ibmvfc_timeout
;
1417 add_timer(&evt
->timer
);
1422 if ((rc
= ibmvfc_send_crq(vhost
, crq_as_u64
[0], crq_as_u64
[1]))) {
1423 list_del(&evt
->queue
);
1424 del_timer(&evt
->timer
);
1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1427 * Firmware will send a CRQ with a transport event (0xFF) to
1428 * tell this client what has happened to the transport. This
1429 * will be handled in ibmvfc_handle_crq()
1431 if (rc
== H_CLOSED
) {
1432 if (printk_ratelimit())
1433 dev_warn(vhost
->dev
, "Send warning. Receive queue closed, will retry.\n");
1435 scsi_dma_unmap(evt
->cmnd
);
1436 ibmvfc_free_event(evt
);
1437 return SCSI_MLQUEUE_HOST_BUSY
;
1440 dev_err(vhost
->dev
, "Send error (rc=%d)\n", rc
);
1442 evt
->cmnd
->result
= DID_ERROR
<< 16;
1443 evt
->done
= ibmvfc_scsi_eh_done
;
1445 evt
->xfer_iu
->mad_common
.status
= IBMVFC_MAD_CRQ_ERROR
;
1449 ibmvfc_trc_start(evt
);
1455 * ibmvfc_log_error - Log an error for the failed command if appropriate
1456 * @evt: ibmvfc event to log
1459 static void ibmvfc_log_error(struct ibmvfc_event
*evt
)
1461 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1462 struct ibmvfc_host
*vhost
= evt
->vhost
;
1463 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1464 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1465 const char *err
= unknown_error
;
1466 int index
= ibmvfc_get_err_index(vfc_cmd
->status
, vfc_cmd
->error
);
1471 logerr
= cmd_status
[index
].log
;
1472 err
= cmd_status
[index
].name
;
1475 if (!logerr
&& (vhost
->log_level
<= (IBMVFC_DEFAULT_LOG_LEVEL
+ 1)))
1478 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1479 rsp_code
= rsp
->data
.info
.rsp_code
;
1481 scmd_printk(KERN_ERR
, cmnd
, "Command (%02X) failed: %s (%x:%x) "
1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1483 cmnd
->cmnd
[0], err
, vfc_cmd
->status
, vfc_cmd
->error
,
1484 rsp
->flags
, rsp_code
, scsi_get_resid(cmnd
), rsp
->scsi_status
);
1488 * ibmvfc_relogin - Log back into the specified device
1489 * @sdev: scsi device struct
1492 static void ibmvfc_relogin(struct scsi_device
*sdev
)
1494 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1495 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1496 struct ibmvfc_target
*tgt
;
1498 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
1499 if (rport
== tgt
->rport
) {
1500 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
1505 ibmvfc_reinit_host(vhost
);
1509 * ibmvfc_scsi_done - Handle responses from commands
1510 * @evt: ibmvfc event to be handled
1512 * Used as a callback when sending scsi cmds.
1514 static void ibmvfc_scsi_done(struct ibmvfc_event
*evt
)
1516 struct ibmvfc_cmd
*vfc_cmd
= &evt
->xfer_iu
->cmd
;
1517 struct ibmvfc_fcp_rsp
*rsp
= &vfc_cmd
->rsp
;
1518 struct scsi_cmnd
*cmnd
= evt
->cmnd
;
1520 u32 sense_len
= rsp
->fcp_sense_len
;
1523 if (vfc_cmd
->response_flags
& IBMVFC_ADAPTER_RESID_VALID
)
1524 scsi_set_resid(cmnd
, vfc_cmd
->adapter_resid
);
1525 else if (rsp
->flags
& FCP_RESID_UNDER
)
1526 scsi_set_resid(cmnd
, rsp
->fcp_resid
);
1528 scsi_set_resid(cmnd
, 0);
1530 if (vfc_cmd
->status
) {
1531 cmnd
->result
= ibmvfc_get_err_result(vfc_cmd
);
1533 if (rsp
->flags
& FCP_RSP_LEN_VALID
)
1534 rsp_len
= rsp
->fcp_rsp_len
;
1535 if ((sense_len
+ rsp_len
) > SCSI_SENSE_BUFFERSIZE
)
1536 sense_len
= SCSI_SENSE_BUFFERSIZE
- rsp_len
;
1537 if ((rsp
->flags
& FCP_SNS_LEN_VALID
) && rsp
->fcp_sense_len
&& rsp_len
<= 8)
1538 memcpy(cmnd
->sense_buffer
, rsp
->data
.sense
+ rsp_len
, sense_len
);
1539 if ((vfc_cmd
->status
& IBMVFC_VIOS_FAILURE
) && (vfc_cmd
->error
== IBMVFC_PLOGI_REQUIRED
))
1540 ibmvfc_relogin(cmnd
->device
);
1542 if (!cmnd
->result
&& (!scsi_get_resid(cmnd
) || (rsp
->flags
& FCP_RESID_OVER
)))
1543 cmnd
->result
= (DID_ERROR
<< 16);
1545 ibmvfc_log_error(evt
);
1548 if (!cmnd
->result
&&
1549 (scsi_bufflen(cmnd
) - scsi_get_resid(cmnd
) < cmnd
->underflow
))
1550 cmnd
->result
= (DID_ERROR
<< 16);
1552 scsi_dma_unmap(cmnd
);
1553 cmnd
->scsi_done(cmnd
);
1557 complete(evt
->eh_comp
);
1559 ibmvfc_free_event(evt
);
1563 * ibmvfc_host_chkready - Check if the host can accept commands
1564 * @vhost: struct ibmvfc host
1567 * 1 if host can accept command / 0 if not
1569 static inline int ibmvfc_host_chkready(struct ibmvfc_host
*vhost
)
1573 switch (vhost
->state
) {
1574 case IBMVFC_LINK_DEAD
:
1575 case IBMVFC_HOST_OFFLINE
:
1576 result
= DID_NO_CONNECT
<< 16;
1579 case IBMVFC_INITIALIZING
:
1581 case IBMVFC_LINK_DOWN
:
1582 result
= DID_REQUEUE
<< 16;
1593 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1594 * @cmnd: struct scsi_cmnd to be executed
1595 * @done: Callback function to be called when cmnd is completed
1598 * 0 on success / other on failure
1600 static int ibmvfc_queuecommand(struct scsi_cmnd
*cmnd
,
1601 void (*done
) (struct scsi_cmnd
*))
1603 struct ibmvfc_host
*vhost
= shost_priv(cmnd
->device
->host
);
1604 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
1605 struct ibmvfc_cmd
*vfc_cmd
;
1606 struct ibmvfc_event
*evt
;
1610 if (unlikely((rc
= fc_remote_port_chkready(rport
))) ||
1611 unlikely((rc
= ibmvfc_host_chkready(vhost
)))) {
1617 cmnd
->result
= (DID_OK
<< 16);
1618 evt
= ibmvfc_get_event(vhost
);
1619 ibmvfc_init_event(evt
, ibmvfc_scsi_done
, IBMVFC_CMD_FORMAT
);
1621 cmnd
->scsi_done
= done
;
1622 vfc_cmd
= &evt
->iu
.cmd
;
1623 memset(vfc_cmd
, 0, sizeof(*vfc_cmd
));
1624 vfc_cmd
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1625 vfc_cmd
->resp
.len
= sizeof(vfc_cmd
->rsp
);
1626 vfc_cmd
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1627 vfc_cmd
->payload_len
= sizeof(vfc_cmd
->iu
);
1628 vfc_cmd
->resp_len
= sizeof(vfc_cmd
->rsp
);
1629 vfc_cmd
->cancel_key
= (unsigned long)cmnd
->device
->hostdata
;
1630 vfc_cmd
->tgt_scsi_id
= rport
->port_id
;
1631 vfc_cmd
->iu
.xfer_len
= scsi_bufflen(cmnd
);
1632 int_to_scsilun(cmnd
->device
->lun
, &vfc_cmd
->iu
.lun
);
1633 memcpy(vfc_cmd
->iu
.cdb
, cmnd
->cmnd
, cmnd
->cmd_len
);
1635 if (scsi_populate_tag_msg(cmnd
, tag
)) {
1636 vfc_cmd
->task_tag
= tag
[1];
1638 case MSG_SIMPLE_TAG
:
1639 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_SIMPLE_TASK
;
1642 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_HEAD_OF_QUEUE
;
1644 case MSG_ORDERED_TAG
:
1645 vfc_cmd
->iu
.pri_task_attr
= IBMVFC_ORDERED_TASK
;
1650 if (likely(!(rc
= ibmvfc_map_sg_data(cmnd
, evt
, vfc_cmd
, vhost
->dev
))))
1651 return ibmvfc_send_event(evt
, vhost
, 0);
1653 ibmvfc_free_event(evt
);
1655 return SCSI_MLQUEUE_HOST_BUSY
;
1657 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1658 scmd_printk(KERN_ERR
, cmnd
,
1659 "Failed to map DMA buffer for command. rc=%d\n", rc
);
1661 cmnd
->result
= DID_ERROR
<< 16;
1667 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1668 * @evt: ibmvfc event struct
1671 static void ibmvfc_sync_completion(struct ibmvfc_event
*evt
)
1673 /* copy the response back */
1675 *evt
->sync_iu
= *evt
->xfer_iu
;
1677 complete(&evt
->comp
);
1681 * ibmvfc_reset_device - Reset the device with the specified reset type
1682 * @sdev: scsi device to reset
1684 * @desc: reset type description for log messages
1687 * 0 on success / other on failure
1689 static int ibmvfc_reset_device(struct scsi_device
*sdev
, int type
, char *desc
)
1691 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1692 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1693 struct ibmvfc_cmd
*tmf
;
1694 struct ibmvfc_event
*evt
= NULL
;
1695 union ibmvfc_iu rsp_iu
;
1696 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1697 int rsp_rc
= -EBUSY
;
1698 unsigned long flags
;
1701 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1702 if (vhost
->state
== IBMVFC_ACTIVE
) {
1703 evt
= ibmvfc_get_event(vhost
);
1704 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1707 memset(tmf
, 0, sizeof(*tmf
));
1708 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1709 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1710 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1711 tmf
->payload_len
= sizeof(tmf
->iu
);
1712 tmf
->resp_len
= sizeof(tmf
->rsp
);
1713 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1714 tmf
->tgt_scsi_id
= rport
->port_id
;
1715 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1716 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1717 tmf
->iu
.tmf_flags
= type
;
1718 evt
->sync_iu
= &rsp_iu
;
1720 init_completion(&evt
->comp
);
1721 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1723 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1726 sdev_printk(KERN_ERR
, sdev
, "Failed to send %s reset event. rc=%d\n",
1731 sdev_printk(KERN_INFO
, sdev
, "Resetting %s\n", desc
);
1732 wait_for_completion(&evt
->comp
);
1734 if (rsp_iu
.cmd
.status
) {
1735 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
1736 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
1738 sdev_printk(KERN_ERR
, sdev
, "%s reset failed: %s (%x:%x) "
1739 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1740 desc
, ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
1741 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
1742 fc_rsp
->scsi_status
);
1745 sdev_printk(KERN_INFO
, sdev
, "%s reset successful\n", desc
);
1747 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1748 ibmvfc_free_event(evt
);
1749 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1754 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1755 * @sdev: scsi device to abort commands
1757 * This sends an Abort Task Set to the VIOS for the specified device. This does
1758 * NOT send any cancel to the VIOS. That must be done separately.
1761 * 0 on success / other on failure
1763 static int ibmvfc_abort_task_set(struct scsi_device
*sdev
)
1765 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1766 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
1767 struct ibmvfc_cmd
*tmf
;
1768 struct ibmvfc_event
*evt
, *found_evt
;
1769 union ibmvfc_iu rsp_iu
;
1770 struct ibmvfc_fcp_rsp
*fc_rsp
= &rsp_iu
.cmd
.rsp
;
1771 int rsp_rc
= -EBUSY
;
1772 unsigned long flags
;
1775 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1777 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1778 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
1785 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1786 sdev_printk(KERN_INFO
, sdev
, "No events found to abort\n");
1787 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1791 if (vhost
->state
== IBMVFC_ACTIVE
) {
1792 evt
= ibmvfc_get_event(vhost
);
1793 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_CMD_FORMAT
);
1796 memset(tmf
, 0, sizeof(*tmf
));
1797 tmf
->resp
.va
= (u64
)evt
->crq
.ioba
+ offsetof(struct ibmvfc_cmd
, rsp
);
1798 tmf
->resp
.len
= sizeof(tmf
->rsp
);
1799 tmf
->frame_type
= IBMVFC_SCSI_FCP_TYPE
;
1800 tmf
->payload_len
= sizeof(tmf
->iu
);
1801 tmf
->resp_len
= sizeof(tmf
->rsp
);
1802 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1803 tmf
->tgt_scsi_id
= rport
->port_id
;
1804 int_to_scsilun(sdev
->lun
, &tmf
->iu
.lun
);
1805 tmf
->flags
= (IBMVFC_NO_MEM_DESC
| IBMVFC_TMF
);
1806 tmf
->iu
.tmf_flags
= IBMVFC_ABORT_TASK_SET
;
1807 evt
->sync_iu
= &rsp_iu
;
1809 init_completion(&evt
->comp
);
1810 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1813 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1816 sdev_printk(KERN_ERR
, sdev
, "Failed to send abort. rc=%d\n", rsp_rc
);
1820 sdev_printk(KERN_INFO
, sdev
, "Aborting outstanding commands\n");
1821 wait_for_completion(&evt
->comp
);
1823 if (rsp_iu
.cmd
.status
) {
1824 if (fc_rsp
->flags
& FCP_RSP_LEN_VALID
)
1825 rsp_code
= fc_rsp
->data
.info
.rsp_code
;
1827 sdev_printk(KERN_ERR
, sdev
, "Abort failed: %s (%x:%x) "
1828 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1829 ibmvfc_get_cmd_error(rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
),
1830 rsp_iu
.cmd
.status
, rsp_iu
.cmd
.error
, fc_rsp
->flags
, rsp_code
,
1831 fc_rsp
->scsi_status
);
1834 sdev_printk(KERN_INFO
, sdev
, "Abort successful\n");
1836 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1837 ibmvfc_free_event(evt
);
1838 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1843 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1844 * @sdev: scsi device to cancel commands
1845 * @type: type of error recovery being performed
1847 * This sends a cancel to the VIOS for the specified device. This does
1848 * NOT send any abort to the actual device. That must be done separately.
1851 * 0 on success / other on failure
1853 static int ibmvfc_cancel_all(struct scsi_device
*sdev
, int type
)
1855 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
1856 struct scsi_target
*starget
= scsi_target(sdev
);
1857 struct fc_rport
*rport
= starget_to_rport(starget
);
1858 struct ibmvfc_tmf
*tmf
;
1859 struct ibmvfc_event
*evt
, *found_evt
;
1860 union ibmvfc_iu rsp
;
1861 int rsp_rc
= -EBUSY
;
1862 unsigned long flags
;
1866 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1868 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1869 if (evt
->cmnd
&& evt
->cmnd
->device
== sdev
) {
1876 if (vhost
->log_level
> IBMVFC_DEFAULT_LOG_LEVEL
)
1877 sdev_printk(KERN_INFO
, sdev
, "No events found to cancel\n");
1878 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1882 if (vhost
->state
== IBMVFC_ACTIVE
) {
1883 evt
= ibmvfc_get_event(vhost
);
1884 ibmvfc_init_event(evt
, ibmvfc_sync_completion
, IBMVFC_MAD_FORMAT
);
1887 memset(tmf
, 0, sizeof(*tmf
));
1888 tmf
->common
.version
= 1;
1889 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
1890 tmf
->common
.length
= sizeof(*tmf
);
1891 tmf
->scsi_id
= rport
->port_id
;
1892 int_to_scsilun(sdev
->lun
, &tmf
->lun
);
1893 tmf
->flags
= (type
| IBMVFC_TMF_LUA_VALID
);
1894 tmf
->cancel_key
= (unsigned long)sdev
->hostdata
;
1895 tmf
->my_cancel_key
= (unsigned long)starget
->hostdata
;
1897 evt
->sync_iu
= &rsp
;
1898 init_completion(&evt
->comp
);
1899 rsp_rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
1902 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1905 sdev_printk(KERN_ERR
, sdev
, "Failed to send cancel event. rc=%d\n", rsp_rc
);
1909 sdev_printk(KERN_INFO
, sdev
, "Cancelling outstanding commands.\n");
1911 wait_for_completion(&evt
->comp
);
1912 status
= rsp
.mad_common
.status
;
1913 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1914 ibmvfc_free_event(evt
);
1915 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1917 if (status
!= IBMVFC_MAD_SUCCESS
) {
1918 sdev_printk(KERN_WARNING
, sdev
, "Cancel failed with rc=%x\n", status
);
1922 sdev_printk(KERN_INFO
, sdev
, "Successfully cancelled outstanding commands\n");
1927 * ibmvfc_match_target - Match function for specified target
1928 * @evt: ibmvfc event struct
1929 * @device: device to match (starget)
1932 * 1 if event matches starget / 0 if event does not match starget
1934 static int ibmvfc_match_target(struct ibmvfc_event
*evt
, void *device
)
1936 if (evt
->cmnd
&& scsi_target(evt
->cmnd
->device
) == device
)
1942 * ibmvfc_match_lun - Match function for specified LUN
1943 * @evt: ibmvfc event struct
1944 * @device: device to match (sdev)
1947 * 1 if event matches sdev / 0 if event does not match sdev
1949 static int ibmvfc_match_lun(struct ibmvfc_event
*evt
, void *device
)
1951 if (evt
->cmnd
&& evt
->cmnd
->device
== device
)
1957 * ibmvfc_wait_for_ops - Wait for ops to complete
1958 * @vhost: ibmvfc host struct
1959 * @device: device to match (starget or sdev)
1960 * @match: match function
1965 static int ibmvfc_wait_for_ops(struct ibmvfc_host
*vhost
, void *device
,
1966 int (*match
) (struct ibmvfc_event
*, void *))
1968 struct ibmvfc_event
*evt
;
1969 DECLARE_COMPLETION_ONSTACK(comp
);
1971 unsigned long flags
;
1972 signed long timeout
= IBMVFC_ABORT_WAIT_TIMEOUT
* HZ
;
1977 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1978 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1979 if (match(evt
, device
)) {
1980 evt
->eh_comp
= &comp
;
1984 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
1987 timeout
= wait_for_completion_timeout(&comp
, timeout
);
1991 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
1992 list_for_each_entry(evt
, &vhost
->sent
, queue
) {
1993 if (match(evt
, device
)) {
1994 evt
->eh_comp
= NULL
;
1998 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2000 dev_err(vhost
->dev
, "Timed out waiting for aborted commands\n");
2002 return wait
? FAILED
: SUCCESS
;
2012 * ibmvfc_eh_abort_handler - Abort a command
2013 * @cmd: scsi command to abort
2018 static int ibmvfc_eh_abort_handler(struct scsi_cmnd
*cmd
)
2020 struct scsi_device
*sdev
= cmd
->device
;
2021 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2022 int cancel_rc
, abort_rc
;
2026 ibmvfc_wait_while_resetting(vhost
);
2027 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_ABORT_TASK_SET
);
2028 abort_rc
= ibmvfc_abort_task_set(sdev
);
2030 if (!cancel_rc
&& !abort_rc
)
2031 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2038 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2039 * @cmd: scsi command struct
2044 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
2046 struct scsi_device
*sdev
= cmd
->device
;
2047 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2048 int cancel_rc
, reset_rc
;
2052 ibmvfc_wait_while_resetting(vhost
);
2053 cancel_rc
= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_LUN_RESET
);
2054 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_LUN_RESET
, "LUN");
2056 if (!cancel_rc
&& !reset_rc
)
2057 rc
= ibmvfc_wait_for_ops(vhost
, sdev
, ibmvfc_match_lun
);
2064 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2065 * @sdev: scsi device struct
2066 * @data: return code
2069 static void ibmvfc_dev_cancel_all(struct scsi_device
*sdev
, void *data
)
2071 unsigned long *rc
= data
;
2072 *rc
|= ibmvfc_cancel_all(sdev
, IBMVFC_TMF_TGT_RESET
);
2076 * ibmvfc_dev_abort_all - Device iterated abort task set function
2077 * @sdev: scsi device struct
2078 * @data: return code
2081 static void ibmvfc_dev_abort_all(struct scsi_device
*sdev
, void *data
)
2083 unsigned long *rc
= data
;
2084 *rc
|= ibmvfc_abort_task_set(sdev
);
2088 * ibmvfc_eh_target_reset_handler - Reset the target
2089 * @cmd: scsi command struct
2094 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
2096 struct scsi_device
*sdev
= cmd
->device
;
2097 struct ibmvfc_host
*vhost
= shost_priv(sdev
->host
);
2098 struct scsi_target
*starget
= scsi_target(sdev
);
2101 unsigned long cancel_rc
= 0;
2104 ibmvfc_wait_while_resetting(vhost
);
2105 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all
);
2106 reset_rc
= ibmvfc_reset_device(sdev
, IBMVFC_TARGET_RESET
, "target");
2108 if (!cancel_rc
&& !reset_rc
)
2109 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2116 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2117 * @cmd: struct scsi_cmnd having problems
2120 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd
*cmd
)
2123 struct ibmvfc_host
*vhost
= shost_priv(cmd
->device
->host
);
2125 dev_err(vhost
->dev
, "Resetting connection due to error recovery\n");
2126 rc
= ibmvfc_issue_fc_host_lip(vhost
->host
);
2127 return rc
? FAILED
: SUCCESS
;
2131 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2132 * @rport: rport struct
2137 static void ibmvfc_terminate_rport_io(struct fc_rport
*rport
)
2139 struct scsi_target
*starget
= to_scsi_target(&rport
->dev
);
2140 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2141 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2142 unsigned long cancel_rc
= 0;
2143 unsigned long abort_rc
= 0;
2147 starget_for_each_device(starget
, &cancel_rc
, ibmvfc_dev_cancel_all
);
2148 starget_for_each_device(starget
, &abort_rc
, ibmvfc_dev_abort_all
);
2150 if (!cancel_rc
&& !abort_rc
)
2151 rc
= ibmvfc_wait_for_ops(vhost
, starget
, ibmvfc_match_target
);
2154 ibmvfc_issue_fc_host_lip(shost
);
2158 static const struct {
2159 enum ibmvfc_async_event ae
;
2162 { IBMVFC_AE_ELS_PLOGI
, "PLOGI" },
2163 { IBMVFC_AE_ELS_LOGO
, "LOGO" },
2164 { IBMVFC_AE_ELS_PRLO
, "PRLO" },
2165 { IBMVFC_AE_SCN_NPORT
, "N-Port SCN" },
2166 { IBMVFC_AE_SCN_GROUP
, "Group SCN" },
2167 { IBMVFC_AE_SCN_DOMAIN
, "Domain SCN" },
2168 { IBMVFC_AE_SCN_FABRIC
, "Fabric SCN" },
2169 { IBMVFC_AE_LINK_UP
, "Link Up" },
2170 { IBMVFC_AE_LINK_DOWN
, "Link Down" },
2171 { IBMVFC_AE_LINK_DEAD
, "Link Dead" },
2172 { IBMVFC_AE_HALT
, "Halt" },
2173 { IBMVFC_AE_RESUME
, "Resume" },
2174 { IBMVFC_AE_ADAPTER_FAILED
, "Adapter Failed" },
2177 static const char *unknown_ae
= "Unknown async";
2180 * ibmvfc_get_ae_desc - Get text description for async event
2184 static const char *ibmvfc_get_ae_desc(u64 ae
)
2188 for (i
= 0; i
< ARRAY_SIZE(ae_desc
); i
++)
2189 if (ae_desc
[i
].ae
== ae
)
2190 return ae_desc
[i
].desc
;
2196 * ibmvfc_handle_async - Handle an async event from the adapter
2197 * @crq: crq to process
2198 * @vhost: ibmvfc host struct
2201 static void ibmvfc_handle_async(struct ibmvfc_async_crq
*crq
,
2202 struct ibmvfc_host
*vhost
)
2204 const char *desc
= ibmvfc_get_ae_desc(crq
->event
);
2205 struct ibmvfc_target
*tgt
;
2207 ibmvfc_log(vhost
, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2208 " node_name: %llx\n", desc
, crq
->scsi_id
, crq
->wwpn
, crq
->node_name
);
2210 switch (crq
->event
) {
2211 case IBMVFC_AE_RESUME
:
2212 switch (crq
->link_state
) {
2213 case IBMVFC_AE_LS_LINK_DOWN
:
2214 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2216 case IBMVFC_AE_LS_LINK_DEAD
:
2217 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2219 case IBMVFC_AE_LS_LINK_UP
:
2220 case IBMVFC_AE_LS_LINK_BOUNCED
:
2222 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2223 vhost
->delay_init
= 1;
2224 __ibmvfc_reset_host(vhost
);
2229 case IBMVFC_AE_LINK_UP
:
2230 vhost
->events_to_log
|= IBMVFC_AE_LINKUP
;
2231 vhost
->delay_init
= 1;
2232 __ibmvfc_reset_host(vhost
);
2234 case IBMVFC_AE_SCN_FABRIC
:
2235 case IBMVFC_AE_SCN_DOMAIN
:
2236 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2237 vhost
->delay_init
= 1;
2238 __ibmvfc_reset_host(vhost
);
2240 case IBMVFC_AE_SCN_NPORT
:
2241 case IBMVFC_AE_SCN_GROUP
:
2242 vhost
->events_to_log
|= IBMVFC_AE_RSCN
;
2243 ibmvfc_reinit_host(vhost
);
2245 case IBMVFC_AE_ELS_LOGO
:
2246 case IBMVFC_AE_ELS_PRLO
:
2247 case IBMVFC_AE_ELS_PLOGI
:
2248 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
2249 if (!crq
->scsi_id
&& !crq
->wwpn
&& !crq
->node_name
)
2251 if (crq
->scsi_id
&& tgt
->scsi_id
!= crq
->scsi_id
)
2253 if (crq
->wwpn
&& tgt
->ids
.port_name
!= crq
->wwpn
)
2255 if (crq
->node_name
&& tgt
->ids
.node_name
!= crq
->node_name
)
2257 if (tgt
->need_login
&& crq
->event
== IBMVFC_AE_ELS_LOGO
)
2259 if (!tgt
->need_login
|| crq
->event
== IBMVFC_AE_ELS_PLOGI
) {
2260 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2261 ibmvfc_reinit_host(vhost
);
2265 case IBMVFC_AE_LINK_DOWN
:
2266 case IBMVFC_AE_ADAPTER_FAILED
:
2267 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2269 case IBMVFC_AE_LINK_DEAD
:
2270 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2272 case IBMVFC_AE_HALT
:
2273 ibmvfc_link_down(vhost
, IBMVFC_HALTED
);
2276 dev_err(vhost
->dev
, "Unknown async event received: %lld\n", crq
->event
);
2282 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2283 * @crq: Command/Response queue
2284 * @vhost: ibmvfc host struct
2287 static void ibmvfc_handle_crq(struct ibmvfc_crq
*crq
, struct ibmvfc_host
*vhost
)
2290 struct ibmvfc_event
*evt
= (struct ibmvfc_event
*)crq
->ioba
;
2292 switch (crq
->valid
) {
2293 case IBMVFC_CRQ_INIT_RSP
:
2294 switch (crq
->format
) {
2295 case IBMVFC_CRQ_INIT
:
2296 dev_info(vhost
->dev
, "Partner initialized\n");
2297 /* Send back a response */
2298 rc
= ibmvfc_send_crq_init_complete(vhost
);
2300 ibmvfc_init_host(vhost
, 0);
2302 dev_err(vhost
->dev
, "Unable to send init rsp. rc=%ld\n", rc
);
2304 case IBMVFC_CRQ_INIT_COMPLETE
:
2305 dev_info(vhost
->dev
, "Partner initialization complete\n");
2306 ibmvfc_init_host(vhost
, 0);
2309 dev_err(vhost
->dev
, "Unknown crq message type: %d\n", crq
->format
);
2312 case IBMVFC_CRQ_XPORT_EVENT
:
2313 vhost
->state
= IBMVFC_NO_CRQ
;
2314 vhost
->logged_in
= 0;
2315 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
2316 if (crq
->format
== IBMVFC_PARTITION_MIGRATED
) {
2317 /* We need to re-setup the interpartition connection */
2318 dev_info(vhost
->dev
, "Re-enabling adapter\n");
2319 vhost
->client_migrated
= 1;
2320 ibmvfc_purge_requests(vhost
, DID_REQUEUE
);
2321 if ((rc
= ibmvfc_reenable_crq_queue(vhost
)) ||
2322 (rc
= ibmvfc_send_crq_init(vhost
))) {
2323 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2324 dev_err(vhost
->dev
, "Error after enable (rc=%ld)\n", rc
);
2326 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2328 dev_err(vhost
->dev
, "Virtual adapter failed (rc=%d)\n", crq
->format
);
2330 ibmvfc_purge_requests(vhost
, DID_ERROR
);
2331 if ((rc
= ibmvfc_reset_crq(vhost
)) ||
2332 (rc
= ibmvfc_send_crq_init(vhost
))) {
2333 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
2334 dev_err(vhost
->dev
, "Error after reset (rc=%ld)\n", rc
);
2336 ibmvfc_link_down(vhost
, IBMVFC_LINK_DOWN
);
2339 case IBMVFC_CRQ_CMD_RSP
:
2342 dev_err(vhost
->dev
, "Got an invalid message type 0x%02x\n", crq
->valid
);
2346 if (crq
->format
== IBMVFC_ASYNC_EVENT
)
2349 /* The only kind of payload CRQs we should get are responses to
2350 * things we send. Make sure this response is to something we
2353 if (unlikely(!ibmvfc_valid_event(&vhost
->pool
, evt
))) {
2354 dev_err(vhost
->dev
, "Returned correlation_token 0x%08llx is invalid!\n",
2359 if (unlikely(atomic_read(&evt
->free
))) {
2360 dev_err(vhost
->dev
, "Received duplicate correlation_token 0x%08llx!\n",
2365 del_timer(&evt
->timer
);
2366 list_del(&evt
->queue
);
2367 ibmvfc_trc_end(evt
);
2372 * ibmvfc_scan_finished - Check if the device scan is done.
2373 * @shost: scsi host struct
2374 * @time: current elapsed time
2377 * 0 if scan is not done / 1 if scan is done
2379 static int ibmvfc_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
2381 unsigned long flags
;
2382 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2385 spin_lock_irqsave(shost
->host_lock
, flags
);
2386 if (time
>= (init_timeout
* HZ
)) {
2387 dev_info(vhost
->dev
, "Scan taking longer than %d seconds, "
2388 "continuing initialization\n", init_timeout
);
2392 if (vhost
->scan_complete
)
2394 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2399 * ibmvfc_slave_alloc - Setup the device's task set value
2400 * @sdev: struct scsi_device device to configure
2402 * Set the device's task set value so that error handling works as
2406 * 0 on success / -ENXIO if device does not exist
2408 static int ibmvfc_slave_alloc(struct scsi_device
*sdev
)
2410 struct Scsi_Host
*shost
= sdev
->host
;
2411 struct fc_rport
*rport
= starget_to_rport(scsi_target(sdev
));
2412 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2413 unsigned long flags
= 0;
2415 if (!rport
|| fc_remote_port_chkready(rport
))
2418 spin_lock_irqsave(shost
->host_lock
, flags
);
2419 sdev
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2420 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2425 * ibmvfc_target_alloc - Setup the target's task set value
2426 * @starget: struct scsi_target
2428 * Set the target's task set value so that error handling works as
2432 * 0 on success / -ENXIO if device does not exist
2434 static int ibmvfc_target_alloc(struct scsi_target
*starget
)
2436 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2437 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2438 unsigned long flags
= 0;
2440 spin_lock_irqsave(shost
->host_lock
, flags
);
2441 starget
->hostdata
= (void *)(unsigned long)vhost
->task_set
++;
2442 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2447 * ibmvfc_slave_configure - Configure the device
2448 * @sdev: struct scsi_device device to configure
2450 * Enable allow_restart for a device if it is a disk. Adjust the
2451 * queue_depth here also.
2456 static int ibmvfc_slave_configure(struct scsi_device
*sdev
)
2458 struct Scsi_Host
*shost
= sdev
->host
;
2459 struct fc_rport
*rport
= starget_to_rport(sdev
->sdev_target
);
2460 unsigned long flags
= 0;
2462 spin_lock_irqsave(shost
->host_lock
, flags
);
2463 if (sdev
->type
== TYPE_DISK
)
2464 sdev
->allow_restart
= 1;
2466 if (sdev
->tagged_supported
) {
2467 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
2468 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2470 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2472 rport
->dev_loss_tmo
= dev_loss_tmo
;
2473 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2478 * ibmvfc_change_queue_depth - Change the device's queue depth
2479 * @sdev: scsi device struct
2480 * @qdepth: depth to set
2485 static int ibmvfc_change_queue_depth(struct scsi_device
*sdev
, int qdepth
)
2487 if (qdepth
> IBMVFC_MAX_CMDS_PER_LUN
)
2488 qdepth
= IBMVFC_MAX_CMDS_PER_LUN
;
2490 scsi_adjust_queue_depth(sdev
, 0, qdepth
);
2491 return sdev
->queue_depth
;
2495 * ibmvfc_change_queue_type - Change the device's queue type
2496 * @sdev: scsi device struct
2497 * @tag_type: type of tags to use
2500 * actual queue type set
2502 static int ibmvfc_change_queue_type(struct scsi_device
*sdev
, int tag_type
)
2504 if (sdev
->tagged_supported
) {
2505 scsi_set_tag_type(sdev
, tag_type
);
2508 scsi_activate_tcq(sdev
, sdev
->queue_depth
);
2510 scsi_deactivate_tcq(sdev
, sdev
->queue_depth
);
2517 static ssize_t
ibmvfc_show_host_partition_name(struct device
*dev
,
2518 struct device_attribute
*attr
, char *buf
)
2520 struct Scsi_Host
*shost
= class_to_shost(dev
);
2521 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2523 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2524 vhost
->login_buf
->resp
.partition_name
);
2527 static ssize_t
ibmvfc_show_host_device_name(struct device
*dev
,
2528 struct device_attribute
*attr
, char *buf
)
2530 struct Scsi_Host
*shost
= class_to_shost(dev
);
2531 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2533 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2534 vhost
->login_buf
->resp
.device_name
);
2537 static ssize_t
ibmvfc_show_host_loc_code(struct device
*dev
,
2538 struct device_attribute
*attr
, char *buf
)
2540 struct Scsi_Host
*shost
= class_to_shost(dev
);
2541 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2543 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2544 vhost
->login_buf
->resp
.port_loc_code
);
2547 static ssize_t
ibmvfc_show_host_drc_name(struct device
*dev
,
2548 struct device_attribute
*attr
, char *buf
)
2550 struct Scsi_Host
*shost
= class_to_shost(dev
);
2551 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2553 return snprintf(buf
, PAGE_SIZE
, "%s\n",
2554 vhost
->login_buf
->resp
.drc_name
);
2557 static ssize_t
ibmvfc_show_host_npiv_version(struct device
*dev
,
2558 struct device_attribute
*attr
, char *buf
)
2560 struct Scsi_Host
*shost
= class_to_shost(dev
);
2561 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2562 return snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->login_buf
->resp
.version
);
2565 static ssize_t
ibmvfc_show_host_capabilities(struct device
*dev
,
2566 struct device_attribute
*attr
, char *buf
)
2568 struct Scsi_Host
*shost
= class_to_shost(dev
);
2569 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2570 return snprintf(buf
, PAGE_SIZE
, "%llx\n", vhost
->login_buf
->resp
.capabilities
);
2574 * ibmvfc_show_log_level - Show the adapter's error logging level
2575 * @dev: class device struct
2579 * number of bytes printed to buffer
2581 static ssize_t
ibmvfc_show_log_level(struct device
*dev
,
2582 struct device_attribute
*attr
, char *buf
)
2584 struct Scsi_Host
*shost
= class_to_shost(dev
);
2585 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2586 unsigned long flags
= 0;
2589 spin_lock_irqsave(shost
->host_lock
, flags
);
2590 len
= snprintf(buf
, PAGE_SIZE
, "%d\n", vhost
->log_level
);
2591 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2596 * ibmvfc_store_log_level - Change the adapter's error logging level
2597 * @dev: class device struct
2601 * number of bytes printed to buffer
2603 static ssize_t
ibmvfc_store_log_level(struct device
*dev
,
2604 struct device_attribute
*attr
,
2605 const char *buf
, size_t count
)
2607 struct Scsi_Host
*shost
= class_to_shost(dev
);
2608 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2609 unsigned long flags
= 0;
2611 spin_lock_irqsave(shost
->host_lock
, flags
);
2612 vhost
->log_level
= simple_strtoul(buf
, NULL
, 10);
2613 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2617 static DEVICE_ATTR(partition_name
, S_IRUGO
, ibmvfc_show_host_partition_name
, NULL
);
2618 static DEVICE_ATTR(device_name
, S_IRUGO
, ibmvfc_show_host_device_name
, NULL
);
2619 static DEVICE_ATTR(port_loc_code
, S_IRUGO
, ibmvfc_show_host_loc_code
, NULL
);
2620 static DEVICE_ATTR(drc_name
, S_IRUGO
, ibmvfc_show_host_drc_name
, NULL
);
2621 static DEVICE_ATTR(npiv_version
, S_IRUGO
, ibmvfc_show_host_npiv_version
, NULL
);
2622 static DEVICE_ATTR(capabilities
, S_IRUGO
, ibmvfc_show_host_capabilities
, NULL
);
2623 static DEVICE_ATTR(log_level
, S_IRUGO
| S_IWUSR
,
2624 ibmvfc_show_log_level
, ibmvfc_store_log_level
);
2626 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2628 * ibmvfc_read_trace - Dump the adapter trace
2629 * @kobj: kobject struct
2630 * @bin_attr: bin_attribute struct
2633 * @count: buffer size
2636 * number of bytes printed to buffer
2638 static ssize_t
ibmvfc_read_trace(struct kobject
*kobj
,
2639 struct bin_attribute
*bin_attr
,
2640 char *buf
, loff_t off
, size_t count
)
2642 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
2643 struct Scsi_Host
*shost
= class_to_shost(dev
);
2644 struct ibmvfc_host
*vhost
= shost_priv(shost
);
2645 unsigned long flags
= 0;
2646 int size
= IBMVFC_TRACE_SIZE
;
2647 char *src
= (char *)vhost
->trace
;
2651 if (off
+ count
> size
) {
2656 spin_lock_irqsave(shost
->host_lock
, flags
);
2657 memcpy(buf
, &src
[off
], count
);
2658 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2662 static struct bin_attribute ibmvfc_trace_attr
= {
2668 .read
= ibmvfc_read_trace
,
2672 static struct device_attribute
*ibmvfc_attrs
[] = {
2673 &dev_attr_partition_name
,
2674 &dev_attr_device_name
,
2675 &dev_attr_port_loc_code
,
2677 &dev_attr_npiv_version
,
2678 &dev_attr_capabilities
,
2679 &dev_attr_log_level
,
2683 static struct scsi_host_template driver_template
= {
2684 .module
= THIS_MODULE
,
2685 .name
= "IBM POWER Virtual FC Adapter",
2686 .proc_name
= IBMVFC_NAME
,
2687 .queuecommand
= ibmvfc_queuecommand
,
2688 .eh_abort_handler
= ibmvfc_eh_abort_handler
,
2689 .eh_device_reset_handler
= ibmvfc_eh_device_reset_handler
,
2690 .eh_target_reset_handler
= ibmvfc_eh_target_reset_handler
,
2691 .eh_host_reset_handler
= ibmvfc_eh_host_reset_handler
,
2692 .slave_alloc
= ibmvfc_slave_alloc
,
2693 .slave_configure
= ibmvfc_slave_configure
,
2694 .target_alloc
= ibmvfc_target_alloc
,
2695 .scan_finished
= ibmvfc_scan_finished
,
2696 .change_queue_depth
= ibmvfc_change_queue_depth
,
2697 .change_queue_type
= ibmvfc_change_queue_type
,
2699 .can_queue
= IBMVFC_MAX_REQUESTS_DEFAULT
,
2701 .sg_tablesize
= SG_ALL
,
2702 .max_sectors
= IBMVFC_MAX_SECTORS
,
2703 .use_clustering
= ENABLE_CLUSTERING
,
2704 .shost_attrs
= ibmvfc_attrs
,
2708 * ibmvfc_next_async_crq - Returns the next entry in async queue
2709 * @vhost: ibmvfc host struct
2712 * Pointer to next entry in queue / NULL if empty
2714 static struct ibmvfc_async_crq
*ibmvfc_next_async_crq(struct ibmvfc_host
*vhost
)
2716 struct ibmvfc_async_crq_queue
*async_crq
= &vhost
->async_crq
;
2717 struct ibmvfc_async_crq
*crq
;
2719 crq
= &async_crq
->msgs
[async_crq
->cur
];
2720 if (crq
->valid
& 0x80) {
2721 if (++async_crq
->cur
== async_crq
->size
)
2731 * ibmvfc_next_crq - Returns the next entry in message queue
2732 * @vhost: ibmvfc host struct
2735 * Pointer to next entry in queue / NULL if empty
2737 static struct ibmvfc_crq
*ibmvfc_next_crq(struct ibmvfc_host
*vhost
)
2739 struct ibmvfc_crq_queue
*queue
= &vhost
->crq
;
2740 struct ibmvfc_crq
*crq
;
2742 crq
= &queue
->msgs
[queue
->cur
];
2743 if (crq
->valid
& 0x80) {
2744 if (++queue
->cur
== queue
->size
)
2754 * ibmvfc_interrupt - Interrupt handler
2755 * @irq: number of irq to handle, not used
2756 * @dev_instance: ibmvfc_host that received interrupt
2761 static irqreturn_t
ibmvfc_interrupt(int irq
, void *dev_instance
)
2763 struct ibmvfc_host
*vhost
= (struct ibmvfc_host
*)dev_instance
;
2764 unsigned long flags
;
2766 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2767 vio_disable_interrupts(to_vio_dev(vhost
->dev
));
2768 tasklet_schedule(&vhost
->tasklet
);
2769 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2774 * ibmvfc_tasklet - Interrupt handler tasklet
2775 * @data: ibmvfc host struct
2780 static void ibmvfc_tasklet(void *data
)
2782 struct ibmvfc_host
*vhost
= data
;
2783 struct vio_dev
*vdev
= to_vio_dev(vhost
->dev
);
2784 struct ibmvfc_crq
*crq
;
2785 struct ibmvfc_async_crq
*async
;
2786 unsigned long flags
;
2789 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
2791 /* Pull all the valid messages off the async CRQ */
2792 while ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
2793 ibmvfc_handle_async(async
, vhost
);
2798 /* Pull all the valid messages off the CRQ */
2799 while ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
2800 ibmvfc_handle_crq(crq
, vhost
);
2805 vio_enable_interrupts(vdev
);
2806 if ((async
= ibmvfc_next_async_crq(vhost
)) != NULL
) {
2807 vio_disable_interrupts(vdev
);
2808 ibmvfc_handle_async(async
, vhost
);
2811 } else if ((crq
= ibmvfc_next_crq(vhost
)) != NULL
) {
2812 vio_disable_interrupts(vdev
);
2813 ibmvfc_handle_crq(crq
, vhost
);
2820 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
2824 * ibmvfc_init_tgt - Set the next init job step for the target
2825 * @tgt: ibmvfc target struct
2826 * @job_step: job step to perform
2829 static void ibmvfc_init_tgt(struct ibmvfc_target
*tgt
,
2830 void (*job_step
) (struct ibmvfc_target
*))
2832 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT
);
2833 tgt
->job_step
= job_step
;
2834 wake_up(&tgt
->vhost
->work_wait_q
);
2838 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2839 * @tgt: ibmvfc target struct
2840 * @job_step: initialization job step
2842 * Returns: 1 if step will be retried / 0 if not
2845 static int ibmvfc_retry_tgt_init(struct ibmvfc_target
*tgt
,
2846 void (*job_step
) (struct ibmvfc_target
*))
2848 if (++tgt
->init_retries
> IBMVFC_MAX_TGT_INIT_RETRIES
) {
2849 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2850 wake_up(&tgt
->vhost
->work_wait_q
);
2853 ibmvfc_init_tgt(tgt
, job_step
);
2857 /* Defined in FC-LS */
2858 static const struct {
2875 * ibmvfc_get_prli_rsp - Find PRLI response index
2876 * @flags: PRLI response flags
2879 static int ibmvfc_get_prli_rsp(u16 flags
)
2882 int code
= (flags
& 0x0f00) >> 8;
2884 for (i
= 0; i
< ARRAY_SIZE(prli_rsp
); i
++)
2885 if (prli_rsp
[i
].code
== code
)
2892 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2893 * @evt: ibmvfc event struct
2896 static void ibmvfc_tgt_prli_done(struct ibmvfc_event
*evt
)
2898 struct ibmvfc_target
*tgt
= evt
->tgt
;
2899 struct ibmvfc_host
*vhost
= evt
->vhost
;
2900 struct ibmvfc_process_login
*rsp
= &evt
->xfer_iu
->prli
;
2901 struct ibmvfc_prli_svc_parms
*parms
= &rsp
->parms
;
2902 u32 status
= rsp
->common
.status
;
2903 int index
, level
= IBMVFC_DEFAULT_LOG_LEVEL
;
2905 vhost
->discovery_threads
--;
2906 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2908 case IBMVFC_MAD_SUCCESS
:
2909 tgt_dbg(tgt
, "Process Login succeeded: %X %02X %04X\n",
2910 parms
->type
, parms
->flags
, parms
->service_parms
);
2912 if (parms
->type
== IBMVFC_SCSI_FCP_TYPE
) {
2913 index
= ibmvfc_get_prli_rsp(parms
->flags
);
2914 if (prli_rsp
[index
].logged_in
) {
2915 if (parms
->flags
& IBMVFC_PRLI_EST_IMG_PAIR
) {
2916 tgt
->need_login
= 0;
2918 if (parms
->service_parms
& IBMVFC_PRLI_TARGET_FUNC
)
2919 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_TARGET
;
2920 if (parms
->service_parms
& IBMVFC_PRLI_INITIATOR_FUNC
)
2921 tgt
->ids
.roles
|= FC_PORT_ROLE_FCP_INITIATOR
;
2924 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2925 } else if (prli_rsp
[index
].retry
)
2926 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2928 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2930 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2932 case IBMVFC_MAD_DRIVER_FAILED
:
2934 case IBMVFC_MAD_CRQ_ERROR
:
2935 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2937 case IBMVFC_MAD_FAILED
:
2939 if ((rsp
->status
& IBMVFC_VIOS_FAILURE
) && rsp
->error
== IBMVFC_PLOGI_REQUIRED
)
2940 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
2941 else if (tgt
->logo_rcvd
)
2942 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
2943 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
2944 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_prli
);
2946 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
2948 tgt_log(tgt
, level
, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2949 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
),
2950 rsp
->status
, rsp
->error
, status
);
2954 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2955 ibmvfc_free_event(evt
);
2956 wake_up(&vhost
->work_wait_q
);
2960 * ibmvfc_tgt_send_prli - Send a process login
2961 * @tgt: ibmvfc target struct
2964 static void ibmvfc_tgt_send_prli(struct ibmvfc_target
*tgt
)
2966 struct ibmvfc_process_login
*prli
;
2967 struct ibmvfc_host
*vhost
= tgt
->vhost
;
2968 struct ibmvfc_event
*evt
;
2970 if (vhost
->discovery_threads
>= disc_threads
)
2973 kref_get(&tgt
->kref
);
2974 evt
= ibmvfc_get_event(vhost
);
2975 vhost
->discovery_threads
++;
2976 ibmvfc_init_event(evt
, ibmvfc_tgt_prli_done
, IBMVFC_MAD_FORMAT
);
2978 prli
= &evt
->iu
.prli
;
2979 memset(prli
, 0, sizeof(*prli
));
2980 prli
->common
.version
= 1;
2981 prli
->common
.opcode
= IBMVFC_PROCESS_LOGIN
;
2982 prli
->common
.length
= sizeof(*prli
);
2983 prli
->scsi_id
= tgt
->scsi_id
;
2985 prli
->parms
.type
= IBMVFC_SCSI_FCP_TYPE
;
2986 prli
->parms
.flags
= IBMVFC_PRLI_EST_IMG_PAIR
;
2987 prli
->parms
.service_parms
= IBMVFC_PRLI_INITIATOR_FUNC
;
2989 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
2990 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
2991 vhost
->discovery_threads
--;
2992 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
2993 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
2995 tgt_dbg(tgt
, "Sent process login\n");
2999 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3000 * @evt: ibmvfc event struct
3003 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event
*evt
)
3005 struct ibmvfc_target
*tgt
= evt
->tgt
;
3006 struct ibmvfc_host
*vhost
= evt
->vhost
;
3007 struct ibmvfc_port_login
*rsp
= &evt
->xfer_iu
->plogi
;
3008 u32 status
= rsp
->common
.status
;
3009 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3011 vhost
->discovery_threads
--;
3012 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3014 case IBMVFC_MAD_SUCCESS
:
3015 tgt_dbg(tgt
, "Port Login succeeded\n");
3016 if (tgt
->ids
.port_name
&&
3017 tgt
->ids
.port_name
!= wwn_to_u64(rsp
->service_parms
.port_name
)) {
3019 tgt_dbg(tgt
, "Port re-init required\n");
3022 tgt
->ids
.node_name
= wwn_to_u64(rsp
->service_parms
.node_name
);
3023 tgt
->ids
.port_name
= wwn_to_u64(rsp
->service_parms
.port_name
);
3024 tgt
->ids
.port_id
= tgt
->scsi_id
;
3025 memcpy(&tgt
->service_parms
, &rsp
->service_parms
,
3026 sizeof(tgt
->service_parms
));
3027 memcpy(&tgt
->service_parms_change
, &rsp
->service_parms_change
,
3028 sizeof(tgt
->service_parms_change
));
3029 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_prli
);
3031 case IBMVFC_MAD_DRIVER_FAILED
:
3033 case IBMVFC_MAD_CRQ_ERROR
:
3034 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3036 case IBMVFC_MAD_FAILED
:
3038 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3039 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_send_plogi
);
3041 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3043 tgt_log(tgt
, level
, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3044 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3045 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3046 ibmvfc_get_ls_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3050 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3051 ibmvfc_free_event(evt
);
3052 wake_up(&vhost
->work_wait_q
);
3056 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3057 * @tgt: ibmvfc target struct
3060 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target
*tgt
)
3062 struct ibmvfc_port_login
*plogi
;
3063 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3064 struct ibmvfc_event
*evt
;
3066 if (vhost
->discovery_threads
>= disc_threads
)
3069 kref_get(&tgt
->kref
);
3071 evt
= ibmvfc_get_event(vhost
);
3072 vhost
->discovery_threads
++;
3073 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3074 ibmvfc_init_event(evt
, ibmvfc_tgt_plogi_done
, IBMVFC_MAD_FORMAT
);
3076 plogi
= &evt
->iu
.plogi
;
3077 memset(plogi
, 0, sizeof(*plogi
));
3078 plogi
->common
.version
= 1;
3079 plogi
->common
.opcode
= IBMVFC_PORT_LOGIN
;
3080 plogi
->common
.length
= sizeof(*plogi
);
3081 plogi
->scsi_id
= tgt
->scsi_id
;
3083 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3084 vhost
->discovery_threads
--;
3085 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3086 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3088 tgt_dbg(tgt
, "Sent port login\n");
3092 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3093 * @evt: ibmvfc event struct
3096 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event
*evt
)
3098 struct ibmvfc_target
*tgt
= evt
->tgt
;
3099 struct ibmvfc_host
*vhost
= evt
->vhost
;
3100 struct ibmvfc_implicit_logout
*rsp
= &evt
->xfer_iu
->implicit_logout
;
3101 u32 status
= rsp
->common
.status
;
3103 vhost
->discovery_threads
--;
3104 ibmvfc_free_event(evt
);
3105 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3108 case IBMVFC_MAD_SUCCESS
:
3109 tgt_dbg(tgt
, "Implicit Logout succeeded\n");
3111 case IBMVFC_MAD_DRIVER_FAILED
:
3112 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3113 wake_up(&vhost
->work_wait_q
);
3115 case IBMVFC_MAD_FAILED
:
3117 tgt_err(tgt
, "Implicit Logout failed: rc=0x%02X\n", status
);
3121 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_INIT
)
3122 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_send_plogi
);
3123 else if (vhost
->action
== IBMVFC_HOST_ACTION_QUERY_TGTS
&&
3124 tgt
->scsi_id
!= tgt
->new_scsi_id
)
3125 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3126 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3127 wake_up(&vhost
->work_wait_q
);
3131 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3132 * @tgt: ibmvfc target struct
3135 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target
*tgt
)
3137 struct ibmvfc_implicit_logout
*mad
;
3138 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3139 struct ibmvfc_event
*evt
;
3141 if (vhost
->discovery_threads
>= disc_threads
)
3144 kref_get(&tgt
->kref
);
3145 evt
= ibmvfc_get_event(vhost
);
3146 vhost
->discovery_threads
++;
3147 ibmvfc_init_event(evt
, ibmvfc_tgt_implicit_logout_done
, IBMVFC_MAD_FORMAT
);
3149 mad
= &evt
->iu
.implicit_logout
;
3150 memset(mad
, 0, sizeof(*mad
));
3151 mad
->common
.version
= 1;
3152 mad
->common
.opcode
= IBMVFC_IMPLICIT_LOGOUT
;
3153 mad
->common
.length
= sizeof(*mad
);
3154 mad
->old_scsi_id
= tgt
->scsi_id
;
3156 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3157 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3158 vhost
->discovery_threads
--;
3159 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3160 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3162 tgt_dbg(tgt
, "Sent Implicit Logout\n");
3166 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3167 * @mad: ibmvfc passthru mad struct
3168 * @tgt: ibmvfc target struct
3171 * 1 if PLOGI needed / 0 if PLOGI not needed
3173 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad
*mad
,
3174 struct ibmvfc_target
*tgt
)
3176 if (memcmp(&mad
->fc_iu
.response
[2], &tgt
->ids
.port_name
,
3177 sizeof(tgt
->ids
.port_name
)))
3179 if (memcmp(&mad
->fc_iu
.response
[4], &tgt
->ids
.node_name
,
3180 sizeof(tgt
->ids
.node_name
)))
3182 if (mad
->fc_iu
.response
[6] != tgt
->scsi_id
)
3188 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3189 * @evt: ibmvfc event struct
3192 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event
*evt
)
3194 struct ibmvfc_target
*tgt
= evt
->tgt
;
3195 struct ibmvfc_host
*vhost
= evt
->vhost
;
3196 struct ibmvfc_passthru_mad
*mad
= &evt
->xfer_iu
->passthru
;
3197 u32 status
= mad
->common
.status
;
3198 u8 fc_reason
, fc_explain
;
3200 vhost
->discovery_threads
--;
3201 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3202 del_timer(&tgt
->timer
);
3205 case IBMVFC_MAD_SUCCESS
:
3206 tgt_dbg(tgt
, "ADISC succeeded\n");
3207 if (ibmvfc_adisc_needs_plogi(mad
, tgt
))
3208 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3210 case IBMVFC_MAD_DRIVER_FAILED
:
3212 case IBMVFC_MAD_FAILED
:
3214 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3215 fc_reason
= (mad
->fc_iu
.response
[1] & 0x00ff0000) >> 16;
3216 fc_explain
= (mad
->fc_iu
.response
[1] & 0x0000ff00) >> 8;
3217 tgt_info(tgt
, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3218 ibmvfc_get_cmd_error(mad
->iu
.status
, mad
->iu
.error
),
3219 mad
->iu
.status
, mad
->iu
.error
,
3220 ibmvfc_get_fc_type(fc_reason
), fc_reason
,
3221 ibmvfc_get_ls_explain(fc_explain
), fc_explain
, status
);
3225 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3226 ibmvfc_free_event(evt
);
3227 wake_up(&vhost
->work_wait_q
);
3231 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3232 * @evt: ibmvfc event struct
3235 static void ibmvfc_init_passthru(struct ibmvfc_event
*evt
)
3237 struct ibmvfc_passthru_mad
*mad
= &evt
->iu
.passthru
;
3239 memset(mad
, 0, sizeof(*mad
));
3240 mad
->common
.version
= 1;
3241 mad
->common
.opcode
= IBMVFC_PASSTHRU
;
3242 mad
->common
.length
= sizeof(*mad
) - sizeof(mad
->fc_iu
) - sizeof(mad
->iu
);
3243 mad
->cmd_ioba
.va
= (u64
)evt
->crq
.ioba
+
3244 offsetof(struct ibmvfc_passthru_mad
, iu
);
3245 mad
->cmd_ioba
.len
= sizeof(mad
->iu
);
3246 mad
->iu
.cmd_len
= sizeof(mad
->fc_iu
.payload
);
3247 mad
->iu
.rsp_len
= sizeof(mad
->fc_iu
.response
);
3248 mad
->iu
.cmd
.va
= (u64
)evt
->crq
.ioba
+
3249 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3250 offsetof(struct ibmvfc_passthru_fc_iu
, payload
);
3251 mad
->iu
.cmd
.len
= sizeof(mad
->fc_iu
.payload
);
3252 mad
->iu
.rsp
.va
= (u64
)evt
->crq
.ioba
+
3253 offsetof(struct ibmvfc_passthru_mad
, fc_iu
) +
3254 offsetof(struct ibmvfc_passthru_fc_iu
, response
);
3255 mad
->iu
.rsp
.len
= sizeof(mad
->fc_iu
.response
);
3259 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3260 * @evt: ibmvfc event struct
3262 * Just cleanup this event struct. Everything else is handled by
3263 * the ADISC completion handler. If the ADISC never actually comes
3264 * back, we still have the timer running on the ADISC event struct
3265 * which will fire and cause the CRQ to get reset.
3268 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event
*evt
)
3270 struct ibmvfc_host
*vhost
= evt
->vhost
;
3271 struct ibmvfc_target
*tgt
= evt
->tgt
;
3273 tgt_dbg(tgt
, "ADISC cancel complete\n");
3274 vhost
->abort_threads
--;
3275 ibmvfc_free_event(evt
);
3276 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3277 wake_up(&vhost
->work_wait_q
);
3281 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3282 * @tgt: ibmvfc target struct
3284 * If an ADISC times out, send a cancel. If the cancel times
3285 * out, reset the CRQ. When the ADISC comes back as cancelled,
3286 * log back into the target.
3288 static void ibmvfc_adisc_timeout(struct ibmvfc_target
*tgt
)
3290 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3291 struct ibmvfc_event
*evt
;
3292 struct ibmvfc_tmf
*tmf
;
3293 unsigned long flags
;
3296 tgt_dbg(tgt
, "ADISC timeout\n");
3297 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3298 if (vhost
->abort_threads
>= disc_threads
||
3299 tgt
->action
!= IBMVFC_TGT_ACTION_INIT_WAIT
||
3300 vhost
->state
!= IBMVFC_INITIALIZING
||
3301 vhost
->action
!= IBMVFC_HOST_ACTION_QUERY_TGTS
) {
3302 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3306 vhost
->abort_threads
++;
3307 kref_get(&tgt
->kref
);
3308 evt
= ibmvfc_get_event(vhost
);
3309 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_cancel_done
, IBMVFC_MAD_FORMAT
);
3313 memset(tmf
, 0, sizeof(*tmf
));
3314 tmf
->common
.version
= 1;
3315 tmf
->common
.opcode
= IBMVFC_TMF_MAD
;
3316 tmf
->common
.length
= sizeof(*tmf
);
3317 tmf
->scsi_id
= tgt
->scsi_id
;
3318 tmf
->cancel_key
= tgt
->cancel_key
;
3320 rc
= ibmvfc_send_event(evt
, vhost
, default_timeout
);
3323 tgt_err(tgt
, "Failed to send cancel event for ADISC. rc=%d\n", rc
);
3324 vhost
->abort_threads
--;
3325 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3326 __ibmvfc_reset_host(vhost
);
3328 tgt_dbg(tgt
, "Attempting to cancel ADISC\n");
3329 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3333 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3334 * @tgt: ibmvfc target struct
3336 * When sending an ADISC we end up with two timers running. The
3337 * first timer is the timer in the ibmvfc target struct. If this
3338 * fires, we send a cancel to the target. The second timer is the
3339 * timer on the ibmvfc event for the ADISC, which is longer. If that
3340 * fires, it means the ADISC timed out and our attempt to cancel it
3341 * also failed, so we need to reset the CRQ.
3343 static void ibmvfc_tgt_adisc(struct ibmvfc_target
*tgt
)
3345 struct ibmvfc_passthru_mad
*mad
;
3346 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3347 struct ibmvfc_event
*evt
;
3349 if (vhost
->discovery_threads
>= disc_threads
)
3352 kref_get(&tgt
->kref
);
3353 evt
= ibmvfc_get_event(vhost
);
3354 vhost
->discovery_threads
++;
3355 ibmvfc_init_event(evt
, ibmvfc_tgt_adisc_done
, IBMVFC_MAD_FORMAT
);
3358 ibmvfc_init_passthru(evt
);
3359 mad
= &evt
->iu
.passthru
;
3360 mad
->iu
.flags
= IBMVFC_FC_ELS
;
3361 mad
->iu
.scsi_id
= tgt
->scsi_id
;
3362 mad
->iu
.cancel_key
= tgt
->cancel_key
;
3364 mad
->fc_iu
.payload
[0] = IBMVFC_ADISC
;
3365 memcpy(&mad
->fc_iu
.payload
[2], &vhost
->login_buf
->resp
.port_name
,
3366 sizeof(vhost
->login_buf
->resp
.port_name
));
3367 memcpy(&mad
->fc_iu
.payload
[4], &vhost
->login_buf
->resp
.node_name
,
3368 sizeof(vhost
->login_buf
->resp
.node_name
));
3369 mad
->fc_iu
.payload
[6] = vhost
->login_buf
->resp
.scsi_id
& 0x00ffffff;
3371 if (timer_pending(&tgt
->timer
))
3372 mod_timer(&tgt
->timer
, jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
));
3374 tgt
->timer
.data
= (unsigned long) tgt
;
3375 tgt
->timer
.expires
= jiffies
+ (IBMVFC_ADISC_TIMEOUT
* HZ
);
3376 tgt
->timer
.function
= (void (*)(unsigned long))ibmvfc_adisc_timeout
;
3377 add_timer(&tgt
->timer
);
3380 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3381 if (ibmvfc_send_event(evt
, vhost
, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT
)) {
3382 vhost
->discovery_threads
--;
3383 del_timer(&tgt
->timer
);
3384 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3385 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3387 tgt_dbg(tgt
, "Sent ADISC\n");
3391 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3392 * @evt: ibmvfc event struct
3395 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event
*evt
)
3397 struct ibmvfc_target
*tgt
= evt
->tgt
;
3398 struct ibmvfc_host
*vhost
= evt
->vhost
;
3399 struct ibmvfc_query_tgt
*rsp
= &evt
->xfer_iu
->query_tgt
;
3400 u32 status
= rsp
->common
.status
;
3401 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3403 vhost
->discovery_threads
--;
3404 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3406 case IBMVFC_MAD_SUCCESS
:
3407 tgt_dbg(tgt
, "Query Target succeeded\n");
3408 tgt
->new_scsi_id
= rsp
->scsi_id
;
3409 if (rsp
->scsi_id
!= tgt
->scsi_id
)
3410 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3412 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_adisc
);
3414 case IBMVFC_MAD_DRIVER_FAILED
:
3416 case IBMVFC_MAD_CRQ_ERROR
:
3417 ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3419 case IBMVFC_MAD_FAILED
:
3421 if ((rsp
->status
& IBMVFC_FABRIC_MAPPED
) == IBMVFC_FABRIC_MAPPED
&&
3422 rsp
->error
== IBMVFC_UNABLE_TO_PERFORM_REQ
&&
3423 rsp
->fc_explain
== IBMVFC_PORT_NAME_NOT_REG
)
3424 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3425 else if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3426 level
+= ibmvfc_retry_tgt_init(tgt
, ibmvfc_tgt_query_target
);
3428 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_DEL_RPORT
);
3430 tgt_log(tgt
, level
, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3431 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
,
3432 ibmvfc_get_fc_type(rsp
->fc_type
), rsp
->fc_type
,
3433 ibmvfc_get_gs_explain(rsp
->fc_explain
), rsp
->fc_explain
, status
);
3437 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3438 ibmvfc_free_event(evt
);
3439 wake_up(&vhost
->work_wait_q
);
3443 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3444 * @tgt: ibmvfc target struct
3447 static void ibmvfc_tgt_query_target(struct ibmvfc_target
*tgt
)
3449 struct ibmvfc_query_tgt
*query_tgt
;
3450 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3451 struct ibmvfc_event
*evt
;
3453 if (vhost
->discovery_threads
>= disc_threads
)
3456 kref_get(&tgt
->kref
);
3457 evt
= ibmvfc_get_event(vhost
);
3458 vhost
->discovery_threads
++;
3460 ibmvfc_init_event(evt
, ibmvfc_tgt_query_target_done
, IBMVFC_MAD_FORMAT
);
3461 query_tgt
= &evt
->iu
.query_tgt
;
3462 memset(query_tgt
, 0, sizeof(*query_tgt
));
3463 query_tgt
->common
.version
= 1;
3464 query_tgt
->common
.opcode
= IBMVFC_QUERY_TARGET
;
3465 query_tgt
->common
.length
= sizeof(*query_tgt
);
3466 query_tgt
->wwpn
= tgt
->ids
.port_name
;
3468 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_INIT_WAIT
);
3469 if (ibmvfc_send_event(evt
, vhost
, default_timeout
)) {
3470 vhost
->discovery_threads
--;
3471 ibmvfc_set_tgt_action(tgt
, IBMVFC_TGT_ACTION_NONE
);
3472 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3474 tgt_dbg(tgt
, "Sent Query Target\n");
3478 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3479 * @vhost: ibmvfc host struct
3480 * @scsi_id: SCSI ID to allocate target for
3483 * 0 on success / other on failure
3485 static int ibmvfc_alloc_target(struct ibmvfc_host
*vhost
, u64 scsi_id
)
3487 struct ibmvfc_target
*tgt
;
3488 unsigned long flags
;
3490 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3491 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3492 if (tgt
->scsi_id
== scsi_id
) {
3493 if (tgt
->need_login
)
3494 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3498 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3500 tgt
= mempool_alloc(vhost
->tgt_pool
, GFP_NOIO
);
3502 dev_err(vhost
->dev
, "Target allocation failure for scsi id %08llx\n",
3507 memset(tgt
, 0, sizeof(*tgt
));
3508 tgt
->scsi_id
= scsi_id
;
3509 tgt
->new_scsi_id
= scsi_id
;
3511 tgt
->need_login
= 1;
3512 tgt
->cancel_key
= vhost
->task_set
++;
3513 init_timer(&tgt
->timer
);
3514 kref_init(&tgt
->kref
);
3515 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_implicit_logout
);
3516 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3517 list_add_tail(&tgt
->queue
, &vhost
->targets
);
3520 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3525 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3526 * @vhost: ibmvfc host struct
3529 * 0 on success / other on failure
3531 static int ibmvfc_alloc_targets(struct ibmvfc_host
*vhost
)
3535 for (i
= 0, rc
= 0; !rc
&& i
< vhost
->num_targets
; i
++)
3536 rc
= ibmvfc_alloc_target(vhost
,
3537 vhost
->disc_buf
->scsi_id
[i
] & IBMVFC_DISC_TGT_SCSI_ID_MASK
);
3543 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3544 * @evt: ibmvfc event struct
3547 static void ibmvfc_discover_targets_done(struct ibmvfc_event
*evt
)
3549 struct ibmvfc_host
*vhost
= evt
->vhost
;
3550 struct ibmvfc_discover_targets
*rsp
= &evt
->xfer_iu
->discover_targets
;
3551 u32 mad_status
= rsp
->common
.status
;
3552 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3554 switch (mad_status
) {
3555 case IBMVFC_MAD_SUCCESS
:
3556 ibmvfc_dbg(vhost
, "Discover Targets succeeded\n");
3557 vhost
->num_targets
= rsp
->num_written
;
3558 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_ALLOC_TGTS
);
3560 case IBMVFC_MAD_FAILED
:
3561 level
+= ibmvfc_retry_host_init(vhost
);
3562 ibmvfc_log(vhost
, level
, "Discover Targets failed: %s (%x:%x)\n",
3563 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3565 case IBMVFC_MAD_DRIVER_FAILED
:
3568 dev_err(vhost
->dev
, "Invalid Discover Targets response: 0x%x\n", mad_status
);
3569 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3573 ibmvfc_free_event(evt
);
3574 wake_up(&vhost
->work_wait_q
);
3578 * ibmvfc_discover_targets - Send Discover Targets MAD
3579 * @vhost: ibmvfc host struct
3582 static void ibmvfc_discover_targets(struct ibmvfc_host
*vhost
)
3584 struct ibmvfc_discover_targets
*mad
;
3585 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3587 ibmvfc_init_event(evt
, ibmvfc_discover_targets_done
, IBMVFC_MAD_FORMAT
);
3588 mad
= &evt
->iu
.discover_targets
;
3589 memset(mad
, 0, sizeof(*mad
));
3590 mad
->common
.version
= 1;
3591 mad
->common
.opcode
= IBMVFC_DISC_TARGETS
;
3592 mad
->common
.length
= sizeof(*mad
);
3593 mad
->bufflen
= vhost
->disc_buf_sz
;
3594 mad
->buffer
.va
= vhost
->disc_buf_dma
;
3595 mad
->buffer
.len
= vhost
->disc_buf_sz
;
3596 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3598 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3599 ibmvfc_dbg(vhost
, "Sent discover targets\n");
3601 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3605 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3606 * @evt: ibmvfc event struct
3609 static void ibmvfc_npiv_login_done(struct ibmvfc_event
*evt
)
3611 struct ibmvfc_host
*vhost
= evt
->vhost
;
3612 u32 mad_status
= evt
->xfer_iu
->npiv_login
.common
.status
;
3613 struct ibmvfc_npiv_login_resp
*rsp
= &vhost
->login_buf
->resp
;
3614 unsigned int npiv_max_sectors
;
3615 int level
= IBMVFC_DEFAULT_LOG_LEVEL
;
3617 switch (mad_status
) {
3618 case IBMVFC_MAD_SUCCESS
:
3619 ibmvfc_free_event(evt
);
3621 case IBMVFC_MAD_FAILED
:
3622 if (ibmvfc_retry_cmd(rsp
->status
, rsp
->error
))
3623 level
+= ibmvfc_retry_host_init(vhost
);
3625 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3626 ibmvfc_log(vhost
, level
, "NPIV Login failed: %s (%x:%x)\n",
3627 ibmvfc_get_cmd_error(rsp
->status
, rsp
->error
), rsp
->status
, rsp
->error
);
3628 ibmvfc_free_event(evt
);
3630 case IBMVFC_MAD_CRQ_ERROR
:
3631 ibmvfc_retry_host_init(vhost
);
3632 case IBMVFC_MAD_DRIVER_FAILED
:
3633 ibmvfc_free_event(evt
);
3636 dev_err(vhost
->dev
, "Invalid NPIV Login response: 0x%x\n", mad_status
);
3637 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3638 ibmvfc_free_event(evt
);
3642 vhost
->client_migrated
= 0;
3644 if (!(rsp
->flags
& IBMVFC_NATIVE_FC
)) {
3645 dev_err(vhost
->dev
, "Virtual adapter does not support FC. %x\n",
3647 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3648 wake_up(&vhost
->work_wait_q
);
3652 if (rsp
->max_cmds
<= IBMVFC_NUM_INTERNAL_REQ
) {
3653 dev_err(vhost
->dev
, "Virtual adapter supported queue depth too small: %d\n",
3655 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3656 wake_up(&vhost
->work_wait_q
);
3660 vhost
->logged_in
= 1;
3661 npiv_max_sectors
= min((uint
)(rsp
->max_dma_len
>> 9), IBMVFC_MAX_SECTORS
);
3662 dev_info(vhost
->dev
, "Host partition: %s, device: %s %s %s max sectors %u\n",
3663 rsp
->partition_name
, rsp
->device_name
, rsp
->port_loc_code
,
3664 rsp
->drc_name
, npiv_max_sectors
);
3666 fc_host_fabric_name(vhost
->host
) = rsp
->node_name
;
3667 fc_host_node_name(vhost
->host
) = rsp
->node_name
;
3668 fc_host_port_name(vhost
->host
) = rsp
->port_name
;
3669 fc_host_port_id(vhost
->host
) = rsp
->scsi_id
;
3670 fc_host_port_type(vhost
->host
) = FC_PORTTYPE_NPIV
;
3671 fc_host_supported_classes(vhost
->host
) = 0;
3672 if (rsp
->service_parms
.class1_parms
[0] & 0x80000000)
3673 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS1
;
3674 if (rsp
->service_parms
.class2_parms
[0] & 0x80000000)
3675 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS2
;
3676 if (rsp
->service_parms
.class3_parms
[0] & 0x80000000)
3677 fc_host_supported_classes(vhost
->host
) |= FC_COS_CLASS3
;
3678 fc_host_maxframe_size(vhost
->host
) =
3679 rsp
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3681 vhost
->host
->can_queue
= rsp
->max_cmds
- IBMVFC_NUM_INTERNAL_REQ
;
3682 vhost
->host
->max_sectors
= npiv_max_sectors
;
3683 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3684 wake_up(&vhost
->work_wait_q
);
3688 * ibmvfc_npiv_login - Sends NPIV login
3689 * @vhost: ibmvfc host struct
3692 static void ibmvfc_npiv_login(struct ibmvfc_host
*vhost
)
3694 struct ibmvfc_npiv_login_mad
*mad
;
3695 struct ibmvfc_event
*evt
= ibmvfc_get_event(vhost
);
3697 ibmvfc_gather_partition_info(vhost
);
3698 ibmvfc_set_login_info(vhost
);
3699 ibmvfc_init_event(evt
, ibmvfc_npiv_login_done
, IBMVFC_MAD_FORMAT
);
3701 memcpy(vhost
->login_buf
, &vhost
->login_info
, sizeof(vhost
->login_info
));
3702 mad
= &evt
->iu
.npiv_login
;
3703 memset(mad
, 0, sizeof(struct ibmvfc_npiv_login_mad
));
3704 mad
->common
.version
= 1;
3705 mad
->common
.opcode
= IBMVFC_NPIV_LOGIN
;
3706 mad
->common
.length
= sizeof(struct ibmvfc_npiv_login_mad
);
3707 mad
->buffer
.va
= vhost
->login_buf_dma
;
3708 mad
->buffer
.len
= sizeof(*vhost
->login_buf
);
3710 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT_WAIT
);
3712 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3713 ibmvfc_dbg(vhost
, "Sent NPIV login\n");
3715 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3719 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
3720 * @vhost: ibmvfc host struct
3723 static void ibmvfc_npiv_logout_done(struct ibmvfc_event
*evt
)
3725 struct ibmvfc_host
*vhost
= evt
->vhost
;
3726 u32 mad_status
= evt
->xfer_iu
->npiv_logout
.common
.status
;
3728 ibmvfc_free_event(evt
);
3730 switch (mad_status
) {
3731 case IBMVFC_MAD_SUCCESS
:
3732 if (list_empty(&vhost
->sent
) &&
3733 vhost
->action
== IBMVFC_HOST_ACTION_LOGO_WAIT
) {
3734 ibmvfc_init_host(vhost
, 0);
3738 case IBMVFC_MAD_FAILED
:
3739 case IBMVFC_MAD_NOT_SUPPORTED
:
3740 case IBMVFC_MAD_CRQ_ERROR
:
3741 case IBMVFC_MAD_DRIVER_FAILED
:
3743 ibmvfc_dbg(vhost
, "NPIV Logout failed. 0x%X\n", mad_status
);
3747 ibmvfc_hard_reset_host(vhost
);
3751 * ibmvfc_npiv_logout - Issue an NPIV Logout
3752 * @vhost: ibmvfc host struct
3755 static void ibmvfc_npiv_logout(struct ibmvfc_host
*vhost
)
3757 struct ibmvfc_npiv_logout_mad
*mad
;
3758 struct ibmvfc_event
*evt
;
3760 evt
= ibmvfc_get_event(vhost
);
3761 ibmvfc_init_event(evt
, ibmvfc_npiv_logout_done
, IBMVFC_MAD_FORMAT
);
3763 mad
= &evt
->iu
.npiv_logout
;
3764 memset(mad
, 0, sizeof(*mad
));
3765 mad
->common
.version
= 1;
3766 mad
->common
.opcode
= IBMVFC_NPIV_LOGOUT
;
3767 mad
->common
.length
= sizeof(struct ibmvfc_npiv_logout_mad
);
3769 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_LOGO_WAIT
);
3771 if (!ibmvfc_send_event(evt
, vhost
, default_timeout
))
3772 ibmvfc_dbg(vhost
, "Sent NPIV logout\n");
3774 ibmvfc_link_down(vhost
, IBMVFC_LINK_DEAD
);
3778 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3779 * @vhost: ibmvfc host struct
3782 * 1 if work to do / 0 if not
3784 static int ibmvfc_dev_init_to_do(struct ibmvfc_host
*vhost
)
3786 struct ibmvfc_target
*tgt
;
3788 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3789 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
||
3790 tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
3798 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3799 * @vhost: ibmvfc host struct
3802 * 1 if work to do / 0 if not
3804 static int __ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
3806 struct ibmvfc_target
*tgt
;
3808 if (kthread_should_stop())
3810 switch (vhost
->action
) {
3811 case IBMVFC_HOST_ACTION_NONE
:
3812 case IBMVFC_HOST_ACTION_INIT_WAIT
:
3813 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
3815 case IBMVFC_HOST_ACTION_TGT_INIT
:
3816 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
3817 if (vhost
->discovery_threads
== disc_threads
)
3819 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3820 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
)
3822 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3823 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT_WAIT
)
3826 case IBMVFC_HOST_ACTION_LOGO
:
3827 case IBMVFC_HOST_ACTION_INIT
:
3828 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
3829 case IBMVFC_HOST_ACTION_TGT_DEL
:
3830 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
3831 case IBMVFC_HOST_ACTION_QUERY
:
3840 * ibmvfc_work_to_do - Is there task level work to do?
3841 * @vhost: ibmvfc host struct
3844 * 1 if work to do / 0 if not
3846 static int ibmvfc_work_to_do(struct ibmvfc_host
*vhost
)
3848 unsigned long flags
;
3851 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3852 rc
= __ibmvfc_work_to_do(vhost
);
3853 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3858 * ibmvfc_log_ae - Log async events if necessary
3859 * @vhost: ibmvfc host struct
3860 * @events: events to log
3863 static void ibmvfc_log_ae(struct ibmvfc_host
*vhost
, int events
)
3865 if (events
& IBMVFC_AE_RSCN
)
3866 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_RSCN
, 0);
3867 if ((events
& IBMVFC_AE_LINKDOWN
) &&
3868 vhost
->state
>= IBMVFC_HALTED
)
3869 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKDOWN
, 0);
3870 if ((events
& IBMVFC_AE_LINKUP
) &&
3871 vhost
->state
== IBMVFC_INITIALIZING
)
3872 fc_host_post_event(vhost
->host
, fc_get_event_number(), FCH_EVT_LINKUP
, 0);
3876 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3877 * @tgt: ibmvfc target struct
3880 static void ibmvfc_tgt_add_rport(struct ibmvfc_target
*tgt
)
3882 struct ibmvfc_host
*vhost
= tgt
->vhost
;
3883 struct fc_rport
*rport
;
3884 unsigned long flags
;
3886 tgt_dbg(tgt
, "Adding rport\n");
3887 rport
= fc_remote_port_add(vhost
->host
, 0, &tgt
->ids
);
3888 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3890 if (rport
&& tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
3891 tgt_dbg(tgt
, "Deleting rport\n");
3892 list_del(&tgt
->queue
);
3893 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3894 fc_remote_port_delete(rport
);
3895 del_timer_sync(&tgt
->timer
);
3896 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3901 tgt_dbg(tgt
, "rport add succeeded\n");
3903 rport
->maxframe_size
= tgt
->service_parms
.common
.bb_rcv_sz
& 0x0fff;
3904 rport
->supported_classes
= 0;
3905 tgt
->target_id
= rport
->scsi_target_id
;
3906 if (tgt
->service_parms
.class1_parms
[0] & 0x80000000)
3907 rport
->supported_classes
|= FC_COS_CLASS1
;
3908 if (tgt
->service_parms
.class2_parms
[0] & 0x80000000)
3909 rport
->supported_classes
|= FC_COS_CLASS2
;
3910 if (tgt
->service_parms
.class3_parms
[0] & 0x80000000)
3911 rport
->supported_classes
|= FC_COS_CLASS3
;
3913 tgt_dbg(tgt
, "rport add failed\n");
3914 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3918 * ibmvfc_do_work - Do task level work
3919 * @vhost: ibmvfc host struct
3922 static void ibmvfc_do_work(struct ibmvfc_host
*vhost
)
3924 struct ibmvfc_target
*tgt
;
3925 unsigned long flags
;
3926 struct fc_rport
*rport
;
3928 ibmvfc_log_ae(vhost
, vhost
->events_to_log
);
3929 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
3930 vhost
->events_to_log
= 0;
3931 switch (vhost
->action
) {
3932 case IBMVFC_HOST_ACTION_NONE
:
3933 case IBMVFC_HOST_ACTION_LOGO_WAIT
:
3934 case IBMVFC_HOST_ACTION_INIT_WAIT
:
3936 case IBMVFC_HOST_ACTION_LOGO
:
3937 vhost
->job_step(vhost
);
3939 case IBMVFC_HOST_ACTION_INIT
:
3940 BUG_ON(vhost
->state
!= IBMVFC_INITIALIZING
);
3941 if (vhost
->delay_init
) {
3942 vhost
->delay_init
= 0;
3943 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3947 vhost
->job_step(vhost
);
3949 case IBMVFC_HOST_ACTION_QUERY
:
3950 list_for_each_entry(tgt
, &vhost
->targets
, queue
)
3951 ibmvfc_init_tgt(tgt
, ibmvfc_tgt_query_target
);
3952 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY_TGTS
);
3954 case IBMVFC_HOST_ACTION_QUERY_TGTS
:
3955 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3956 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
3962 if (!ibmvfc_dev_init_to_do(vhost
))
3963 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL
);
3965 case IBMVFC_HOST_ACTION_TGT_DEL
:
3966 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED
:
3967 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
3968 if (tgt
->action
== IBMVFC_TGT_ACTION_DEL_RPORT
) {
3969 tgt_dbg(tgt
, "Deleting rport\n");
3972 list_del(&tgt
->queue
);
3973 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3975 fc_remote_port_delete(rport
);
3976 del_timer_sync(&tgt
->timer
);
3977 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
3982 if (vhost
->state
== IBMVFC_INITIALIZING
) {
3983 if (vhost
->action
== IBMVFC_HOST_ACTION_TGT_DEL_FAILED
) {
3984 if (vhost
->reinit
) {
3986 scsi_block_requests(vhost
->host
);
3987 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_QUERY
);
3988 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3990 ibmvfc_set_host_state(vhost
, IBMVFC_ACTIVE
);
3991 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
3992 wake_up(&vhost
->init_wait_q
);
3993 schedule_work(&vhost
->rport_add_work_q
);
3994 vhost
->init_retries
= 0;
3995 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
3996 scsi_unblock_requests(vhost
->host
);
4001 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_INIT
);
4002 vhost
->job_step
= ibmvfc_discover_targets
;
4005 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_NONE
);
4006 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4007 scsi_unblock_requests(vhost
->host
);
4008 wake_up(&vhost
->init_wait_q
);
4012 case IBMVFC_HOST_ACTION_ALLOC_TGTS
:
4013 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_INIT
);
4014 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4015 ibmvfc_alloc_targets(vhost
);
4016 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4018 case IBMVFC_HOST_ACTION_TGT_INIT
:
4019 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4020 if (tgt
->action
== IBMVFC_TGT_ACTION_INIT
) {
4026 if (!ibmvfc_dev_init_to_do(vhost
))
4027 ibmvfc_set_host_action(vhost
, IBMVFC_HOST_ACTION_TGT_DEL_FAILED
);
4033 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4037 * ibmvfc_work - Do task level work
4038 * @data: ibmvfc host struct
4043 static int ibmvfc_work(void *data
)
4045 struct ibmvfc_host
*vhost
= data
;
4048 set_user_nice(current
, -20);
4051 rc
= wait_event_interruptible(vhost
->work_wait_q
,
4052 ibmvfc_work_to_do(vhost
));
4056 if (kthread_should_stop())
4059 ibmvfc_do_work(vhost
);
4062 ibmvfc_dbg(vhost
, "ibmvfc kthread exiting...\n");
4067 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4068 * @vhost: ibmvfc host struct
4070 * Allocates a page for messages, maps it for dma, and registers
4071 * the crq with the hypervisor.
4074 * zero on success / other on failure
4076 static int ibmvfc_init_crq(struct ibmvfc_host
*vhost
)
4078 int rc
, retrc
= -ENOMEM
;
4079 struct device
*dev
= vhost
->dev
;
4080 struct vio_dev
*vdev
= to_vio_dev(dev
);
4081 struct ibmvfc_crq_queue
*crq
= &vhost
->crq
;
4084 crq
->msgs
= (struct ibmvfc_crq
*)get_zeroed_page(GFP_KERNEL
);
4089 crq
->size
= PAGE_SIZE
/ sizeof(*crq
->msgs
);
4090 crq
->msg_token
= dma_map_single(dev
, crq
->msgs
,
4091 PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4093 if (dma_mapping_error(dev
, crq
->msg_token
))
4096 retrc
= rc
= plpar_hcall_norets(H_REG_CRQ
, vdev
->unit_address
,
4097 crq
->msg_token
, PAGE_SIZE
);
4099 if (rc
== H_RESOURCE
)
4100 /* maybe kexecing and resource is busy. try a reset */
4101 retrc
= rc
= ibmvfc_reset_crq(vhost
);
4104 dev_warn(dev
, "Partner adapter not ready\n");
4106 dev_warn(dev
, "Error %d opening adapter\n", rc
);
4107 goto reg_crq_failed
;
4112 tasklet_init(&vhost
->tasklet
, (void *)ibmvfc_tasklet
, (unsigned long)vhost
);
4114 if ((rc
= request_irq(vdev
->irq
, ibmvfc_interrupt
, 0, IBMVFC_NAME
, vhost
))) {
4115 dev_err(dev
, "Couldn't register irq 0x%x. rc=%d\n", vdev
->irq
, rc
);
4116 goto req_irq_failed
;
4119 if ((rc
= vio_enable_interrupts(vdev
))) {
4120 dev_err(dev
, "Error %d enabling interrupts\n", rc
);
4121 goto req_irq_failed
;
4129 tasklet_kill(&vhost
->tasklet
);
4131 rc
= plpar_hcall_norets(H_FREE_CRQ
, vdev
->unit_address
);
4132 } while (rc
== H_BUSY
|| H_IS_LONG_BUSY(rc
));
4134 dma_unmap_single(dev
, crq
->msg_token
, PAGE_SIZE
, DMA_BIDIRECTIONAL
);
4136 free_page((unsigned long)crq
->msgs
);
4141 * ibmvfc_free_mem - Free memory for vhost
4142 * @vhost: ibmvfc host struct
4147 static void ibmvfc_free_mem(struct ibmvfc_host
*vhost
)
4149 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4152 mempool_destroy(vhost
->tgt_pool
);
4153 kfree(vhost
->trace
);
4154 dma_free_coherent(vhost
->dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4155 vhost
->disc_buf_dma
);
4156 dma_free_coherent(vhost
->dev
, sizeof(*vhost
->login_buf
),
4157 vhost
->login_buf
, vhost
->login_buf_dma
);
4158 dma_pool_destroy(vhost
->sg_pool
);
4159 dma_unmap_single(vhost
->dev
, async_q
->msg_token
,
4160 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4161 free_page((unsigned long)async_q
->msgs
);
4166 * ibmvfc_alloc_mem - Allocate memory for vhost
4167 * @vhost: ibmvfc host struct
4170 * 0 on success / non-zero on failure
4172 static int ibmvfc_alloc_mem(struct ibmvfc_host
*vhost
)
4174 struct ibmvfc_async_crq_queue
*async_q
= &vhost
->async_crq
;
4175 struct device
*dev
= vhost
->dev
;
4178 async_q
->msgs
= (struct ibmvfc_async_crq
*)get_zeroed_page(GFP_KERNEL
);
4179 if (!async_q
->msgs
) {
4180 dev_err(dev
, "Couldn't allocate async queue.\n");
4184 async_q
->size
= PAGE_SIZE
/ sizeof(struct ibmvfc_async_crq
);
4185 async_q
->msg_token
= dma_map_single(dev
, async_q
->msgs
,
4186 async_q
->size
* sizeof(*async_q
->msgs
),
4189 if (dma_mapping_error(dev
, async_q
->msg_token
)) {
4190 dev_err(dev
, "Failed to map async queue\n");
4191 goto free_async_crq
;
4194 vhost
->sg_pool
= dma_pool_create(IBMVFC_NAME
, dev
,
4195 SG_ALL
* sizeof(struct srp_direct_buf
),
4196 sizeof(struct srp_direct_buf
), 0);
4198 if (!vhost
->sg_pool
) {
4199 dev_err(dev
, "Failed to allocate sg pool\n");
4200 goto unmap_async_crq
;
4203 vhost
->login_buf
= dma_alloc_coherent(dev
, sizeof(*vhost
->login_buf
),
4204 &vhost
->login_buf_dma
, GFP_KERNEL
);
4206 if (!vhost
->login_buf
) {
4207 dev_err(dev
, "Couldn't allocate NPIV login buffer\n");
4211 vhost
->disc_buf_sz
= sizeof(vhost
->disc_buf
->scsi_id
[0]) * max_targets
;
4212 vhost
->disc_buf
= dma_alloc_coherent(dev
, vhost
->disc_buf_sz
,
4213 &vhost
->disc_buf_dma
, GFP_KERNEL
);
4215 if (!vhost
->disc_buf
) {
4216 dev_err(dev
, "Couldn't allocate Discover Targets buffer\n");
4217 goto free_login_buffer
;
4220 vhost
->trace
= kcalloc(IBMVFC_NUM_TRACE_ENTRIES
,
4221 sizeof(struct ibmvfc_trace_entry
), GFP_KERNEL
);
4224 goto free_disc_buffer
;
4226 vhost
->tgt_pool
= mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ
,
4227 sizeof(struct ibmvfc_target
));
4229 if (!vhost
->tgt_pool
) {
4230 dev_err(dev
, "Couldn't allocate target memory pool\n");
4238 kfree(vhost
->trace
);
4240 dma_free_coherent(dev
, vhost
->disc_buf_sz
, vhost
->disc_buf
,
4241 vhost
->disc_buf_dma
);
4243 dma_free_coherent(dev
, sizeof(*vhost
->login_buf
),
4244 vhost
->login_buf
, vhost
->login_buf_dma
);
4246 dma_pool_destroy(vhost
->sg_pool
);
4248 dma_unmap_single(dev
, async_q
->msg_token
,
4249 async_q
->size
* sizeof(*async_q
->msgs
), DMA_BIDIRECTIONAL
);
4251 free_page((unsigned long)async_q
->msgs
);
4258 * ibmvfc_rport_add_thread - Worker thread for rport adds
4259 * @work: work struct
4262 static void ibmvfc_rport_add_thread(struct work_struct
*work
)
4264 struct ibmvfc_host
*vhost
= container_of(work
, struct ibmvfc_host
,
4266 struct ibmvfc_target
*tgt
;
4267 struct fc_rport
*rport
;
4268 unsigned long flags
;
4272 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4275 if (vhost
->state
!= IBMVFC_ACTIVE
)
4278 list_for_each_entry(tgt
, &vhost
->targets
, queue
) {
4279 if (tgt
->add_rport
) {
4282 kref_get(&tgt
->kref
);
4285 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4286 ibmvfc_tgt_add_rport(tgt
);
4287 } else if (get_device(&rport
->dev
)) {
4288 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4289 tgt_dbg(tgt
, "Setting rport roles\n");
4290 fc_remote_port_rolechg(rport
, tgt
->ids
.roles
);
4291 put_device(&rport
->dev
);
4294 kref_put(&tgt
->kref
, ibmvfc_release_tgt
);
4295 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4301 if (vhost
->state
== IBMVFC_ACTIVE
)
4302 vhost
->scan_complete
= 1;
4303 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4308 * ibmvfc_probe - Adapter hot plug add entry point
4309 * @vdev: vio device struct
4310 * @id: vio device id struct
4313 * 0 on success / non-zero on failure
4315 static int ibmvfc_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
4317 struct ibmvfc_host
*vhost
;
4318 struct Scsi_Host
*shost
;
4319 struct device
*dev
= &vdev
->dev
;
4323 shost
= scsi_host_alloc(&driver_template
, sizeof(*vhost
));
4325 dev_err(dev
, "Couldn't allocate host data\n");
4329 shost
->transportt
= ibmvfc_transport_template
;
4330 shost
->can_queue
= max_requests
;
4331 shost
->max_lun
= max_lun
;
4332 shost
->max_id
= max_targets
;
4333 shost
->max_sectors
= IBMVFC_MAX_SECTORS
;
4334 shost
->max_cmd_len
= IBMVFC_MAX_CDB_LEN
;
4335 shost
->unique_id
= shost
->host_no
;
4337 vhost
= shost_priv(shost
);
4338 INIT_LIST_HEAD(&vhost
->sent
);
4339 INIT_LIST_HEAD(&vhost
->free
);
4340 INIT_LIST_HEAD(&vhost
->targets
);
4341 sprintf(vhost
->name
, IBMVFC_NAME
);
4342 vhost
->host
= shost
;
4344 vhost
->partition_number
= -1;
4345 vhost
->log_level
= log_level
;
4346 vhost
->task_set
= 1;
4347 strcpy(vhost
->partition_name
, "UNKNOWN");
4348 init_waitqueue_head(&vhost
->work_wait_q
);
4349 init_waitqueue_head(&vhost
->init_wait_q
);
4350 INIT_WORK(&vhost
->rport_add_work_q
, ibmvfc_rport_add_thread
);
4352 if ((rc
= ibmvfc_alloc_mem(vhost
)))
4353 goto free_scsi_host
;
4355 vhost
->work_thread
= kthread_run(ibmvfc_work
, vhost
, "%s_%d", IBMVFC_NAME
,
4358 if (IS_ERR(vhost
->work_thread
)) {
4359 dev_err(dev
, "Couldn't create kernel thread: %ld\n",
4360 PTR_ERR(vhost
->work_thread
));
4364 if ((rc
= ibmvfc_init_crq(vhost
))) {
4365 dev_err(dev
, "Couldn't initialize crq. rc=%d\n", rc
);
4369 if ((rc
= ibmvfc_init_event_pool(vhost
))) {
4370 dev_err(dev
, "Couldn't initialize event pool. rc=%d\n", rc
);
4374 if ((rc
= scsi_add_host(shost
, dev
)))
4375 goto release_event_pool
;
4377 if ((rc
= ibmvfc_create_trace_file(&shost
->shost_dev
.kobj
,
4378 &ibmvfc_trace_attr
))) {
4379 dev_err(dev
, "Failed to create trace file. rc=%d\n", rc
);
4383 dev_set_drvdata(dev
, vhost
);
4384 spin_lock(&ibmvfc_driver_lock
);
4385 list_add_tail(&vhost
->queue
, &ibmvfc_head
);
4386 spin_unlock(&ibmvfc_driver_lock
);
4388 ibmvfc_send_crq_init(vhost
);
4389 scsi_scan_host(shost
);
4393 scsi_remove_host(shost
);
4395 ibmvfc_free_event_pool(vhost
);
4397 ibmvfc_release_crq_queue(vhost
);
4399 kthread_stop(vhost
->work_thread
);
4401 ibmvfc_free_mem(vhost
);
4403 scsi_host_put(shost
);
4410 * ibmvfc_remove - Adapter hot plug remove entry point
4411 * @vdev: vio device struct
4416 static int ibmvfc_remove(struct vio_dev
*vdev
)
4418 struct ibmvfc_host
*vhost
= dev_get_drvdata(&vdev
->dev
);
4419 unsigned long flags
;
4422 ibmvfc_remove_trace_file(&vhost
->host
->shost_dev
.kobj
, &ibmvfc_trace_attr
);
4423 ibmvfc_link_down(vhost
, IBMVFC_HOST_OFFLINE
);
4424 ibmvfc_wait_while_resetting(vhost
);
4425 ibmvfc_release_crq_queue(vhost
);
4426 kthread_stop(vhost
->work_thread
);
4427 fc_remove_host(vhost
->host
);
4428 scsi_remove_host(vhost
->host
);
4430 spin_lock_irqsave(vhost
->host
->host_lock
, flags
);
4431 ibmvfc_purge_requests(vhost
, DID_ERROR
);
4432 ibmvfc_free_event_pool(vhost
);
4433 spin_unlock_irqrestore(vhost
->host
->host_lock
, flags
);
4435 ibmvfc_free_mem(vhost
);
4436 spin_lock(&ibmvfc_driver_lock
);
4437 list_del(&vhost
->queue
);
4438 spin_unlock(&ibmvfc_driver_lock
);
4439 scsi_host_put(vhost
->host
);
4445 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4446 * @vdev: vio device struct
4449 * Number of bytes the driver will need to DMA map at the same time in
4450 * order to perform well.
4452 static unsigned long ibmvfc_get_desired_dma(struct vio_dev
*vdev
)
4454 unsigned long pool_dma
= max_requests
* sizeof(union ibmvfc_iu
);
4455 return pool_dma
+ ((512 * 1024) * driver_template
.cmd_per_lun
);
4458 static struct vio_device_id ibmvfc_device_table
[] __devinitdata
= {
4459 {"fcp", "IBM,vfc-client"},
4462 MODULE_DEVICE_TABLE(vio
, ibmvfc_device_table
);
4464 static struct vio_driver ibmvfc_driver
= {
4465 .id_table
= ibmvfc_device_table
,
4466 .probe
= ibmvfc_probe
,
4467 .remove
= ibmvfc_remove
,
4468 .get_desired_dma
= ibmvfc_get_desired_dma
,
4470 .name
= IBMVFC_NAME
,
4471 .owner
= THIS_MODULE
,
4475 static struct fc_function_template ibmvfc_transport_functions
= {
4476 .show_host_fabric_name
= 1,
4477 .show_host_node_name
= 1,
4478 .show_host_port_name
= 1,
4479 .show_host_supported_classes
= 1,
4480 .show_host_port_type
= 1,
4481 .show_host_port_id
= 1,
4482 .show_host_maxframe_size
= 1,
4484 .get_host_port_state
= ibmvfc_get_host_port_state
,
4485 .show_host_port_state
= 1,
4487 .get_host_speed
= ibmvfc_get_host_speed
,
4488 .show_host_speed
= 1,
4490 .issue_fc_host_lip
= ibmvfc_issue_fc_host_lip
,
4491 .terminate_rport_io
= ibmvfc_terminate_rport_io
,
4493 .show_rport_maxframe_size
= 1,
4494 .show_rport_supported_classes
= 1,
4496 .set_rport_dev_loss_tmo
= ibmvfc_set_rport_dev_loss_tmo
,
4497 .show_rport_dev_loss_tmo
= 1,
4499 .get_starget_node_name
= ibmvfc_get_starget_node_name
,
4500 .show_starget_node_name
= 1,
4502 .get_starget_port_name
= ibmvfc_get_starget_port_name
,
4503 .show_starget_port_name
= 1,
4505 .get_starget_port_id
= ibmvfc_get_starget_port_id
,
4506 .show_starget_port_id
= 1,
4510 * ibmvfc_module_init - Initialize the ibmvfc module
4513 * 0 on success / other on failure
4515 static int __init
ibmvfc_module_init(void)
4519 if (!firmware_has_feature(FW_FEATURE_VIO
))
4522 printk(KERN_INFO IBMVFC_NAME
": IBM Virtual Fibre Channel Driver version: %s %s\n",
4523 IBMVFC_DRIVER_VERSION
, IBMVFC_DRIVER_DATE
);
4525 ibmvfc_transport_template
= fc_attach_transport(&ibmvfc_transport_functions
);
4526 if (!ibmvfc_transport_template
)
4529 rc
= vio_register_driver(&ibmvfc_driver
);
4531 fc_release_transport(ibmvfc_transport_template
);
4536 * ibmvfc_module_exit - Teardown the ibmvfc module
4541 static void __exit
ibmvfc_module_exit(void)
4543 vio_unregister_driver(&ibmvfc_driver
);
4544 fc_release_transport(ibmvfc_transport_template
);
4547 module_init(ibmvfc_module_init
);
4548 module_exit(ibmvfc_module_exit
);