2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
32 #include <linux/stringify.h>
33 #include <asm/firmware.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_device.h>
40 #include <scsi/scsi_tcq.h>
41 #include <scsi/scsi_transport_fc.h>
44 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
45 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
46 static unsigned int max_lun = IBMVFC_MAX_LUN;
47 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
48 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
49 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
50 static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
51 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
52 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
53 static LIST_HEAD(ibmvfc_head);
54 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
55 static struct scsi_transport_template *ibmvfc_transport_template;
57 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
62 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
63 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
65 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
66 MODULE_PARM_DESC(default_timeout,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
69 module_param_named(max_requests, max_requests, uint, S_IRUGO);
70 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
72 module_param_named(max_lun, max_lun, uint, S_IRUGO);
73 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
75 module_param_named(max_targets, max_targets, uint, S_IRUGO);
76 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
78 module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR);
79 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
81 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
82 MODULE_PARM_DESC(debug, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG) "]");
84 module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
85 MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
89 module_param_named(log_level, log_level, uint, 0);
90 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
126 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
130 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
131 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
132 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
134 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
135 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
136 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
138 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
141 static void ibmvfc_npiv_login(struct ibmvfc_host *);
142 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
143 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
144 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
146 static const char *unknown_error = "unknown error";
148 #ifdef CONFIG_SCSI_IBMVFC_TRACE
150 * ibmvfc_trc_start - Log a start trace entry
151 * @evt: ibmvfc event struct
154 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
156 struct ibmvfc_host *vhost = evt->vhost;
157 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
158 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
159 struct ibmvfc_trace_entry *entry;
161 entry = &vhost->trace[vhost->trace_index++];
163 entry->time = jiffies;
164 entry->fmt = evt->crq.format;
165 entry->type = IBMVFC_TRC_START;
167 switch (entry->fmt) {
168 case IBMVFC_CMD_FORMAT:
169 entry->op_code = vfc_cmd->iu.cdb[0];
170 entry->scsi_id = vfc_cmd->tgt_scsi_id;
171 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
172 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
173 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
175 case IBMVFC_MAD_FORMAT:
176 entry->op_code = mad->opcode;
184 * ibmvfc_trc_end - Log an end trace entry
185 * @evt: ibmvfc event struct
188 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
190 struct ibmvfc_host *vhost = evt->vhost;
191 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
192 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
193 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
196 entry->time = jiffies;
197 entry->fmt = evt->crq.format;
198 entry->type = IBMVFC_TRC_END;
200 switch (entry->fmt) {
201 case IBMVFC_CMD_FORMAT:
202 entry->op_code = vfc_cmd->iu.cdb[0];
203 entry->scsi_id = vfc_cmd->tgt_scsi_id;
204 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
205 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
206 entry->u.end.status = vfc_cmd->status;
207 entry->u.end.error = vfc_cmd->error;
208 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
209 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
210 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
212 case IBMVFC_MAD_FORMAT:
213 entry->op_code = mad->opcode;
214 entry->u.end.status = mad->status;
223 #define ibmvfc_trc_start(evt) do { } while (0)
224 #define ibmvfc_trc_end(evt) do { } while (0)
228 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
229 * @status: status / error class
233 * index into cmd_status / -EINVAL on failure
235 static int ibmvfc_get_err_index(u16 status, u16 error)
239 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
240 if ((cmd_status[i].status & status) == cmd_status[i].status &&
241 cmd_status[i].error == error)
248 * ibmvfc_get_cmd_error - Find the error description for the fcp response
249 * @status: status / error class
253 * error description string
255 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
257 int rc = ibmvfc_get_err_index(status, error);
259 return cmd_status[rc].name;
260 return unknown_error;
264 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
265 * @vfc_cmd: ibmvfc command struct
268 * SCSI result value to return for completed command
270 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
273 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
274 int fc_rsp_len = rsp->fcp_rsp_len;
276 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
277 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
278 rsp->data.info.rsp_code))
279 return DID_ERROR << 16;
281 if (!vfc_cmd->status) {
282 if (rsp->flags & FCP_RESID_OVER)
283 return rsp->scsi_status | (DID_ERROR << 16);
285 return rsp->scsi_status | (DID_OK << 16);
288 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
290 return rsp->scsi_status | (cmd_status[err].result << 16);
291 return rsp->scsi_status | (DID_ERROR << 16);
295 * ibmvfc_retry_cmd - Determine if error status is retryable
296 * @status: status / error class
300 * 1 if error should be retried / 0 if it should not
302 static int ibmvfc_retry_cmd(u16 status, u16 error)
304 int rc = ibmvfc_get_err_index(status, error);
307 return cmd_status[rc].retry;
311 static const char *unknown_fc_explain = "unknown fc explain";
313 static const struct {
317 { 0x00, "no additional explanation" },
318 { 0x01, "service parameter error - options" },
319 { 0x03, "service parameter error - initiator control" },
320 { 0x05, "service parameter error - recipient control" },
321 { 0x07, "service parameter error - received data field size" },
322 { 0x09, "service parameter error - concurrent seq" },
323 { 0x0B, "service parameter error - credit" },
324 { 0x0D, "invalid N_Port/F_Port_Name" },
325 { 0x0E, "invalid node/Fabric Name" },
326 { 0x0F, "invalid common service parameters" },
327 { 0x11, "invalid association header" },
328 { 0x13, "association header required" },
329 { 0x15, "invalid originator S_ID" },
330 { 0x17, "invalid OX_ID-RX-ID combination" },
331 { 0x19, "command (request) already in progress" },
332 { 0x1E, "N_Port Login requested" },
333 { 0x1F, "Invalid N_Port_ID" },
336 static const struct {
340 { 0x00, "no additional explanation" },
341 { 0x01, "port identifier not registered" },
342 { 0x02, "port name not registered" },
343 { 0x03, "node name not registered" },
344 { 0x04, "class of service not registered" },
345 { 0x06, "initial process associator not registered" },
346 { 0x07, "FC-4 TYPEs not registered" },
347 { 0x08, "symbolic port name not registered" },
348 { 0x09, "symbolic node name not registered" },
349 { 0x0A, "port type not registered" },
350 { 0xF0, "authorization exception" },
351 { 0xF1, "authentication exception" },
352 { 0xF2, "data base full" },
353 { 0xF3, "data base empty" },
354 { 0xF4, "processing request" },
355 { 0xF5, "unable to verify connection" },
356 { 0xF6, "devices not in a common zone" },
360 * ibmvfc_get_ls_explain - Return the FC Explain description text
361 * @status: FC Explain status
366 static const char *ibmvfc_get_ls_explain(u16 status)
370 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
371 if (ls_explain[i].fc_explain == status)
372 return ls_explain[i].name;
374 return unknown_fc_explain;
378 * ibmvfc_get_gs_explain - Return the FC Explain description text
379 * @status: FC Explain status
384 static const char *ibmvfc_get_gs_explain(u16 status)
388 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
389 if (gs_explain[i].fc_explain == status)
390 return gs_explain[i].name;
392 return unknown_fc_explain;
395 static const struct {
396 enum ibmvfc_fc_type fc_type;
399 { IBMVFC_FABRIC_REJECT, "fabric reject" },
400 { IBMVFC_PORT_REJECT, "port reject" },
401 { IBMVFC_LS_REJECT, "ELS reject" },
402 { IBMVFC_FABRIC_BUSY, "fabric busy" },
403 { IBMVFC_PORT_BUSY, "port busy" },
404 { IBMVFC_BASIC_REJECT, "basic reject" },
407 static const char *unknown_fc_type = "unknown fc type";
410 * ibmvfc_get_fc_type - Return the FC Type description text
411 * @status: FC Type error status
416 static const char *ibmvfc_get_fc_type(u16 status)
420 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
421 if (fc_type[i].fc_type == status)
422 return fc_type[i].name;
424 return unknown_fc_type;
428 * ibmvfc_set_tgt_action - Set the next init action for the target
429 * @tgt: ibmvfc target struct
430 * @action: action to perform
433 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
434 enum ibmvfc_target_action action)
436 switch (tgt->action) {
437 case IBMVFC_TGT_ACTION_DEL_RPORT:
440 tgt->action = action;
446 * ibmvfc_set_host_state - Set the state for the host
447 * @vhost: ibmvfc host struct
448 * @state: state to set host to
451 * 0 if state changed / non-zero if not changed
453 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
454 enum ibmvfc_host_state state)
458 switch (vhost->state) {
459 case IBMVFC_HOST_OFFLINE:
463 vhost->state = state;
471 * ibmvfc_set_host_action - Set the next init action for the host
472 * @vhost: ibmvfc host struct
473 * @action: action to perform
476 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
477 enum ibmvfc_host_action action)
480 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
481 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
482 vhost->action = action;
484 case IBMVFC_HOST_ACTION_INIT_WAIT:
485 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
486 vhost->action = action;
488 case IBMVFC_HOST_ACTION_QUERY:
489 switch (vhost->action) {
490 case IBMVFC_HOST_ACTION_INIT_WAIT:
491 case IBMVFC_HOST_ACTION_NONE:
492 case IBMVFC_HOST_ACTION_TGT_ADD:
493 vhost->action = action;
499 case IBMVFC_HOST_ACTION_TGT_INIT:
500 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
501 vhost->action = action;
503 case IBMVFC_HOST_ACTION_INIT:
504 case IBMVFC_HOST_ACTION_TGT_DEL:
505 case IBMVFC_HOST_ACTION_QUERY_TGTS:
506 case IBMVFC_HOST_ACTION_TGT_ADD:
507 case IBMVFC_HOST_ACTION_NONE:
509 vhost->action = action;
515 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
516 * @vhost: ibmvfc host struct
521 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
523 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
524 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
525 scsi_block_requests(vhost->host);
526 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
531 wake_up(&vhost->work_wait_q);
535 * ibmvfc_link_down - Handle a link down event from the adapter
536 * @vhost: ibmvfc host struct
537 * @state: ibmvfc host state to enter
540 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
541 enum ibmvfc_host_state state)
543 struct ibmvfc_target *tgt;
546 scsi_block_requests(vhost->host);
547 list_for_each_entry(tgt, &vhost->targets, queue)
548 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
549 ibmvfc_set_host_state(vhost, state);
550 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
551 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
552 wake_up(&vhost->work_wait_q);
557 * ibmvfc_init_host - Start host initialization
558 * @vhost: ibmvfc host struct
559 * @relogin: is this a re-login?
564 static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
566 struct ibmvfc_target *tgt;
568 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
569 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
571 "Host initialization retries exceeded. Taking adapter offline\n");
572 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
577 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
579 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
580 vhost->async_crq.cur = 0;
583 list_for_each_entry(tgt, &vhost->targets, queue)
585 scsi_block_requests(vhost->host);
586 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
587 vhost->job_step = ibmvfc_npiv_login;
588 wake_up(&vhost->work_wait_q);
593 * ibmvfc_send_crq - Send a CRQ
594 * @vhost: ibmvfc host struct
595 * @word1: the first 64 bits of the data
596 * @word2: the second 64 bits of the data
599 * 0 on success / other on failure
601 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
603 struct vio_dev *vdev = to_vio_dev(vhost->dev);
604 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
608 * ibmvfc_send_crq_init - Send a CRQ init message
609 * @vhost: ibmvfc host struct
612 * 0 on success / other on failure
614 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
616 ibmvfc_dbg(vhost, "Sending CRQ init\n");
617 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
621 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
622 * @vhost: ibmvfc host struct
625 * 0 on success / other on failure
627 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
629 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
630 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
634 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
635 * @vhost: ibmvfc host struct
637 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
638 * the crq with the hypervisor.
640 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
643 struct vio_dev *vdev = to_vio_dev(vhost->dev);
644 struct ibmvfc_crq_queue *crq = &vhost->crq;
646 ibmvfc_dbg(vhost, "Releasing CRQ\n");
647 free_irq(vdev->irq, vhost);
649 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
650 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
652 vhost->state = IBMVFC_NO_CRQ;
653 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
654 free_page((unsigned long)crq->msgs);
658 * ibmvfc_reenable_crq_queue - reenables the CRQ
659 * @vhost: ibmvfc host struct
662 * 0 on success / other on failure
664 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
667 struct vio_dev *vdev = to_vio_dev(vhost->dev);
669 /* Re-enable the CRQ */
671 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
672 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
675 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
681 * ibmvfc_reset_crq - resets a crq after a failure
682 * @vhost: ibmvfc host struct
685 * 0 on success / other on failure
687 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
690 struct vio_dev *vdev = to_vio_dev(vhost->dev);
691 struct ibmvfc_crq_queue *crq = &vhost->crq;
695 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
696 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
698 vhost->state = IBMVFC_NO_CRQ;
699 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
701 /* Clean out the queue */
702 memset(crq->msgs, 0, PAGE_SIZE);
705 /* And re-open it again */
706 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
707 crq->msg_token, PAGE_SIZE);
710 /* Adapter is good, but other end is not ready */
711 dev_warn(vhost->dev, "Partner adapter not ready\n");
713 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
719 * ibmvfc_valid_event - Determines if event is valid.
720 * @pool: event_pool that contains the event
721 * @evt: ibmvfc event to be checked for validity
724 * 1 if event is valid / 0 if event is not valid
726 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
727 struct ibmvfc_event *evt)
729 int index = evt - pool->events;
730 if (index < 0 || index >= pool->size) /* outside of bounds */
732 if (evt != pool->events + index) /* unaligned */
738 * ibmvfc_free_event - Free the specified event
739 * @evt: ibmvfc_event to be freed
742 static void ibmvfc_free_event(struct ibmvfc_event *evt)
744 struct ibmvfc_host *vhost = evt->vhost;
745 struct ibmvfc_event_pool *pool = &vhost->pool;
747 BUG_ON(!ibmvfc_valid_event(pool, evt));
748 BUG_ON(atomic_inc_return(&evt->free) != 1);
749 list_add_tail(&evt->queue, &vhost->free);
753 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
754 * @evt: ibmvfc event struct
756 * This function does not setup any error status, that must be done
757 * before this function gets called.
759 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
761 struct scsi_cmnd *cmnd = evt->cmnd;
764 scsi_dma_unmap(cmnd);
765 cmnd->scsi_done(cmnd);
768 ibmvfc_free_event(evt);
772 * ibmvfc_fail_request - Fail request with specified error code
773 * @evt: ibmvfc event struct
774 * @error_code: error code to fail request with
779 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
782 evt->cmnd->result = (error_code << 16);
783 evt->done = ibmvfc_scsi_eh_done;
785 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
787 list_del(&evt->queue);
788 del_timer(&evt->timer);
794 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
795 * @vhost: ibmvfc host struct
796 * @error_code: error code to fail requests with
801 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
803 struct ibmvfc_event *evt, *pos;
805 ibmvfc_dbg(vhost, "Purging all requests\n");
806 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
807 ibmvfc_fail_request(evt, error_code);
811 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
812 * @vhost: struct ibmvfc host to reset
814 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
818 scsi_block_requests(vhost->host);
819 ibmvfc_purge_requests(vhost, DID_ERROR);
820 if ((rc = ibmvfc_reset_crq(vhost)) ||
821 (rc = ibmvfc_send_crq_init(vhost)) ||
822 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
823 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
824 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
826 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
830 * ibmvfc_reset_host - Reset the connection to the server
831 * @vhost: struct ibmvfc host to reset
833 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
837 spin_lock_irqsave(vhost->host->host_lock, flags);
838 __ibmvfc_reset_host(vhost);
839 spin_unlock_irqrestore(vhost->host->host_lock, flags);
843 * ibmvfc_retry_host_init - Retry host initialization if allowed
844 * @vhost: ibmvfc host struct
847 static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
849 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
850 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
852 "Host initialization retries exceeded. Taking adapter offline\n");
853 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
854 } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES)
855 __ibmvfc_reset_host(vhost);
857 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
860 wake_up(&vhost->work_wait_q);
864 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
865 * @starget: scsi target struct
868 * ibmvfc_target struct / NULL if not found
870 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
872 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
873 struct ibmvfc_host *vhost = shost_priv(shost);
874 struct ibmvfc_target *tgt;
876 list_for_each_entry(tgt, &vhost->targets, queue)
877 if (tgt->target_id == starget->id) {
878 kref_get(&tgt->kref);
885 * ibmvfc_get_target - Find the specified scsi_target
886 * @starget: scsi target struct
889 * ibmvfc_target struct / NULL if not found
891 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
893 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
894 struct ibmvfc_target *tgt;
897 spin_lock_irqsave(shost->host_lock, flags);
898 tgt = __ibmvfc_get_target(starget);
899 spin_unlock_irqrestore(shost->host_lock, flags);
904 * ibmvfc_get_host_speed - Get host port speed
905 * @shost: scsi host struct
910 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
912 struct ibmvfc_host *vhost = shost_priv(shost);
915 spin_lock_irqsave(shost->host_lock, flags);
916 if (vhost->state == IBMVFC_ACTIVE) {
917 switch (vhost->login_buf->resp.link_speed / 100) {
919 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
922 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
925 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
928 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
931 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
934 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
937 ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n",
938 vhost->login_buf->resp.link_speed / 100);
939 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
943 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
944 spin_unlock_irqrestore(shost->host_lock, flags);
948 * ibmvfc_get_host_port_state - Get host port state
949 * @shost: scsi host struct
954 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
956 struct ibmvfc_host *vhost = shost_priv(shost);
959 spin_lock_irqsave(shost->host_lock, flags);
960 switch (vhost->state) {
961 case IBMVFC_INITIALIZING:
963 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
965 case IBMVFC_LINK_DOWN:
966 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
968 case IBMVFC_LINK_DEAD:
969 case IBMVFC_HOST_OFFLINE:
970 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
973 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
976 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
979 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
980 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
983 spin_unlock_irqrestore(shost->host_lock, flags);
987 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
988 * @rport: rport struct
989 * @timeout: timeout value
994 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
997 rport->dev_loss_tmo = timeout;
999 rport->dev_loss_tmo = 1;
1003 * ibmvfc_release_tgt - Free memory allocated for a target
1004 * @kref: kref struct
1007 static void ibmvfc_release_tgt(struct kref *kref)
1009 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1014 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1015 * @starget: scsi target struct
1020 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1022 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1023 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1025 kref_put(&tgt->kref, ibmvfc_release_tgt);
1029 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1030 * @starget: scsi target struct
1035 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1037 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1038 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1040 kref_put(&tgt->kref, ibmvfc_release_tgt);
1044 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1045 * @starget: scsi target struct
1050 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1052 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1053 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1055 kref_put(&tgt->kref, ibmvfc_release_tgt);
1059 * ibmvfc_wait_while_resetting - Wait while the host resets
1060 * @vhost: ibmvfc host struct
1063 * 0 on success / other on failure
1065 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1067 long timeout = wait_event_timeout(vhost->init_wait_q,
1068 ((vhost->state == IBMVFC_ACTIVE ||
1069 vhost->state == IBMVFC_HOST_OFFLINE ||
1070 vhost->state == IBMVFC_LINK_DEAD) &&
1071 vhost->action == IBMVFC_HOST_ACTION_NONE),
1072 (init_timeout * HZ));
1074 return timeout ? 0 : -EIO;
1078 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1079 * @shost: scsi host struct
1082 * 0 on success / other on failure
1084 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1086 struct ibmvfc_host *vhost = shost_priv(shost);
1088 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1089 ibmvfc_reset_host(vhost);
1090 return ibmvfc_wait_while_resetting(vhost);
1094 * ibmvfc_gather_partition_info - Gather info about the LPAR
1099 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1101 struct device_node *rootdn;
1103 const unsigned int *num;
1105 rootdn = of_find_node_by_path("/");
1109 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1111 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1112 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1114 vhost->partition_number = *num;
1115 of_node_put(rootdn);
1119 * ibmvfc_set_login_info - Setup info for NPIV login
1120 * @vhost: ibmvfc host struct
1125 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1127 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1128 struct device_node *of_node = vhost->dev->archdata.of_node;
1129 const char *location;
1131 memset(login_info, 0, sizeof(*login_info));
1133 login_info->ostype = IBMVFC_OS_LINUX;
1134 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1135 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1136 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1137 login_info->partition_num = vhost->partition_number;
1138 login_info->vfc_frame_version = 1;
1139 login_info->fcp_version = 3;
1140 if (vhost->client_migrated)
1141 login_info->flags = IBMVFC_CLIENT_MIGRATED;
1143 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1144 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1145 login_info->async.va = vhost->async_crq.msg_token;
1146 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
1147 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1148 strncpy(login_info->device_name,
1149 vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME);
1151 location = of_get_property(of_node, "ibm,loc-code", NULL);
1152 location = location ? location : vhost->dev->bus_id;
1153 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1157 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1158 * @vhost: ibmvfc host who owns the event pool
1160 * Returns zero on success.
1162 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1165 struct ibmvfc_event_pool *pool = &vhost->pool;
1168 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1169 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1173 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1174 pool->size * sizeof(*pool->iu_storage),
1175 &pool->iu_token, 0);
1177 if (!pool->iu_storage) {
1178 kfree(pool->events);
1182 for (i = 0; i < pool->size; ++i) {
1183 struct ibmvfc_event *evt = &pool->events[i];
1184 atomic_set(&evt->free, 1);
1185 evt->crq.valid = 0x80;
1186 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1187 evt->xfer_iu = pool->iu_storage + i;
1189 evt->ext_list = NULL;
1190 list_add_tail(&evt->queue, &vhost->free);
1198 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1199 * @vhost: ibmvfc host who owns the event pool
1202 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1205 struct ibmvfc_event_pool *pool = &vhost->pool;
1208 for (i = 0; i < pool->size; ++i) {
1209 list_del(&pool->events[i].queue);
1210 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1211 if (pool->events[i].ext_list)
1212 dma_pool_free(vhost->sg_pool,
1213 pool->events[i].ext_list,
1214 pool->events[i].ext_list_token);
1217 kfree(pool->events);
1218 dma_free_coherent(vhost->dev,
1219 pool->size * sizeof(*pool->iu_storage),
1220 pool->iu_storage, pool->iu_token);
1225 * ibmvfc_get_event - Gets the next free event in pool
1226 * @vhost: ibmvfc host struct
1228 * Returns a free event from the pool.
1230 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1232 struct ibmvfc_event *evt;
1234 BUG_ON(list_empty(&vhost->free));
1235 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1236 atomic_set(&evt->free, 0);
1237 list_del(&evt->queue);
1242 * ibmvfc_init_event - Initialize fields in an event struct that are always
1245 * @done: Routine to call when the event is responded to
1246 * @format: SRP or MAD format
1248 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1249 void (*done) (struct ibmvfc_event *), u8 format)
1252 evt->sync_iu = NULL;
1253 evt->crq.format = format;
1258 * ibmvfc_map_sg_list - Initialize scatterlist
1259 * @scmd: scsi command struct
1260 * @nseg: number of scatterlist segments
1261 * @md: memory descriptor list to initialize
1263 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1264 struct srp_direct_buf *md)
1267 struct scatterlist *sg;
1269 scsi_for_each_sg(scmd, sg, nseg, i) {
1270 md[i].va = sg_dma_address(sg);
1271 md[i].len = sg_dma_len(sg);
1277 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1278 * @scmd: Scsi_Cmnd with the scatterlist
1279 * @evt: ibmvfc event struct
1280 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1281 * @dev: device for which to map dma memory
1284 * 0 on success / non-zero on failure
1286 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1287 struct ibmvfc_event *evt,
1288 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1292 struct srp_direct_buf *data = &vfc_cmd->ioba;
1293 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1295 sg_mapped = scsi_dma_map(scmd);
1297 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1299 } else if (unlikely(sg_mapped < 0)) {
1300 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1301 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1305 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1306 vfc_cmd->flags |= IBMVFC_WRITE;
1307 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1309 vfc_cmd->flags |= IBMVFC_READ;
1310 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1313 if (sg_mapped == 1) {
1314 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1318 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1320 if (!evt->ext_list) {
1321 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1322 &evt->ext_list_token);
1324 if (!evt->ext_list) {
1325 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1330 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1332 data->va = evt->ext_list_token;
1333 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1339 * ibmvfc_timeout - Internal command timeout handler
1340 * @evt: struct ibmvfc_event that timed out
1342 * Called when an internally generated command times out
1344 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1346 struct ibmvfc_host *vhost = evt->vhost;
1347 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1348 ibmvfc_reset_host(vhost);
1352 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1353 * @evt: event to be sent
1354 * @vhost: ibmvfc host struct
1355 * @timeout: timeout in seconds - 0 means do not time command
1357 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1359 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1360 struct ibmvfc_host *vhost, unsigned long timeout)
1362 u64 *crq_as_u64 = (u64 *) &evt->crq;
1365 /* Copy the IU into the transfer area */
1366 *evt->xfer_iu = evt->iu;
1367 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1368 evt->xfer_iu->cmd.tag = (u64)evt;
1369 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1370 evt->xfer_iu->mad_common.tag = (u64)evt;
1374 list_add_tail(&evt->queue, &vhost->sent);
1375 init_timer(&evt->timer);
1378 evt->timer.data = (unsigned long) evt;
1379 evt->timer.expires = jiffies + (timeout * HZ);
1380 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1381 add_timer(&evt->timer);
1384 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1385 list_del(&evt->queue);
1386 del_timer(&evt->timer);
1388 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1389 * Firmware will send a CRQ with a transport event (0xFF) to
1390 * tell this client what has happened to the transport. This
1391 * will be handled in ibmvfc_handle_crq()
1393 if (rc == H_CLOSED) {
1394 if (printk_ratelimit())
1395 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1397 scsi_dma_unmap(evt->cmnd);
1398 ibmvfc_free_event(evt);
1399 return SCSI_MLQUEUE_HOST_BUSY;
1402 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1404 evt->cmnd->result = DID_ERROR << 16;
1405 evt->done = ibmvfc_scsi_eh_done;
1407 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1411 ibmvfc_trc_start(evt);
1417 * ibmvfc_log_error - Log an error for the failed command if appropriate
1418 * @evt: ibmvfc event to log
1421 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1423 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1424 struct ibmvfc_host *vhost = evt->vhost;
1425 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1426 struct scsi_cmnd *cmnd = evt->cmnd;
1427 const char *err = unknown_error;
1428 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1433 logerr = cmd_status[index].log;
1434 err = cmd_status[index].name;
1437 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1440 if (rsp->flags & FCP_RSP_LEN_VALID)
1441 rsp_code = rsp->data.info.rsp_code;
1443 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1444 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1445 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1446 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1450 * ibmvfc_scsi_done - Handle responses from commands
1451 * @evt: ibmvfc event to be handled
1453 * Used as a callback when sending scsi cmds.
1455 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1457 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1458 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1459 struct scsi_cmnd *cmnd = evt->cmnd;
1461 u32 sense_len = rsp->fcp_sense_len;
1464 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1465 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1466 else if (rsp->flags & FCP_RESID_UNDER)
1467 scsi_set_resid(cmnd, rsp->fcp_resid);
1469 scsi_set_resid(cmnd, 0);
1471 if (vfc_cmd->status) {
1472 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1474 if (rsp->flags & FCP_RSP_LEN_VALID)
1475 rsp_len = rsp->fcp_rsp_len;
1476 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1477 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1478 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1479 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1481 ibmvfc_log_error(evt);
1484 if (!cmnd->result &&
1485 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1486 cmnd->result = (DID_ERROR << 16);
1488 scsi_dma_unmap(cmnd);
1489 cmnd->scsi_done(cmnd);
1492 ibmvfc_free_event(evt);
1496 * ibmvfc_host_chkready - Check if the host can accept commands
1497 * @vhost: struct ibmvfc host
1500 * 1 if host can accept command / 0 if not
1502 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1506 switch (vhost->state) {
1507 case IBMVFC_LINK_DEAD:
1508 case IBMVFC_HOST_OFFLINE:
1509 result = DID_NO_CONNECT << 16;
1512 case IBMVFC_INITIALIZING:
1514 case IBMVFC_LINK_DOWN:
1515 result = DID_REQUEUE << 16;
1526 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1527 * @cmnd: struct scsi_cmnd to be executed
1528 * @done: Callback function to be called when cmnd is completed
1531 * 0 on success / other on failure
1533 static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1534 void (*done) (struct scsi_cmnd *))
1536 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1537 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1538 struct ibmvfc_cmd *vfc_cmd;
1539 struct ibmvfc_event *evt;
1543 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1544 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1550 cmnd->result = (DID_OK << 16);
1551 evt = ibmvfc_get_event(vhost);
1552 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1554 cmnd->scsi_done = done;
1555 vfc_cmd = &evt->iu.cmd;
1556 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1557 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1558 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1559 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1560 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1561 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1562 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1563 vfc_cmd->tgt_scsi_id = rport->port_id;
1564 if ((rport->supported_classes & FC_COS_CLASS3) &&
1565 (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3))
1566 vfc_cmd->flags = IBMVFC_CLASS_3_ERR;
1567 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1568 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1569 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1571 if (scsi_populate_tag_msg(cmnd, tag)) {
1572 vfc_cmd->task_tag = tag[1];
1574 case MSG_SIMPLE_TAG:
1575 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1578 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1580 case MSG_ORDERED_TAG:
1581 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1586 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1587 return ibmvfc_send_event(evt, vhost, 0);
1589 ibmvfc_free_event(evt);
1591 return SCSI_MLQUEUE_HOST_BUSY;
1593 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1594 scmd_printk(KERN_ERR, cmnd,
1595 "Failed to map DMA buffer for command. rc=%d\n", rc);
1597 cmnd->result = DID_ERROR << 16;
1603 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1604 * @evt: ibmvfc event struct
1607 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1609 /* copy the response back */
1611 *evt->sync_iu = *evt->xfer_iu;
1613 complete(&evt->comp);
1617 * ibmvfc_reset_device - Reset the device with the specified reset type
1618 * @sdev: scsi device to reset
1620 * @desc: reset type description for log messages
1623 * 0 on success / other on failure
1625 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1627 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1628 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1629 struct ibmvfc_cmd *tmf;
1630 struct ibmvfc_event *evt;
1631 union ibmvfc_iu rsp_iu;
1632 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1633 int rsp_rc = -EBUSY;
1634 unsigned long flags;
1637 spin_lock_irqsave(vhost->host->host_lock, flags);
1638 if (vhost->state == IBMVFC_ACTIVE) {
1639 evt = ibmvfc_get_event(vhost);
1640 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1643 memset(tmf, 0, sizeof(*tmf));
1644 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1645 tmf->resp.len = sizeof(tmf->rsp);
1646 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1647 tmf->payload_len = sizeof(tmf->iu);
1648 tmf->resp_len = sizeof(tmf->rsp);
1649 tmf->cancel_key = (unsigned long)sdev->hostdata;
1650 tmf->tgt_scsi_id = rport->port_id;
1651 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1652 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1653 tmf->iu.tmf_flags = type;
1654 evt->sync_iu = &rsp_iu;
1656 init_completion(&evt->comp);
1657 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1659 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1662 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1667 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1668 wait_for_completion(&evt->comp);
1670 if (rsp_iu.cmd.status) {
1671 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1672 rsp_code = fc_rsp->data.info.rsp_code;
1674 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1675 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1676 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1677 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1678 fc_rsp->scsi_status);
1681 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1683 spin_lock_irqsave(vhost->host->host_lock, flags);
1684 ibmvfc_free_event(evt);
1685 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1690 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1691 * @sdev: scsi device to abort commands
1693 * This sends an Abort Task Set to the VIOS for the specified device. This does
1694 * NOT send any cancel to the VIOS. That must be done separately.
1697 * 0 on success / other on failure
1699 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1701 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1702 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1703 struct ibmvfc_cmd *tmf;
1704 struct ibmvfc_event *evt, *found_evt;
1705 union ibmvfc_iu rsp_iu;
1706 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1707 int rsp_rc = -EBUSY;
1708 unsigned long flags;
1711 spin_lock_irqsave(vhost->host->host_lock, flags);
1713 list_for_each_entry(evt, &vhost->sent, queue) {
1714 if (evt->cmnd && evt->cmnd->device == sdev) {
1721 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1722 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1727 if (vhost->state == IBMVFC_ACTIVE) {
1728 evt = ibmvfc_get_event(vhost);
1729 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1732 memset(tmf, 0, sizeof(*tmf));
1733 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1734 tmf->resp.len = sizeof(tmf->rsp);
1735 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1736 tmf->payload_len = sizeof(tmf->iu);
1737 tmf->resp_len = sizeof(tmf->rsp);
1738 tmf->cancel_key = (unsigned long)sdev->hostdata;
1739 tmf->tgt_scsi_id = rport->port_id;
1740 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1741 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1742 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1743 evt->sync_iu = &rsp_iu;
1745 init_completion(&evt->comp);
1746 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1749 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1752 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1756 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1757 wait_for_completion(&evt->comp);
1759 if (rsp_iu.cmd.status) {
1760 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1761 rsp_code = fc_rsp->data.info.rsp_code;
1763 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1764 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1765 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1766 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1767 fc_rsp->scsi_status);
1770 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1772 spin_lock_irqsave(vhost->host->host_lock, flags);
1773 ibmvfc_free_event(evt);
1774 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1779 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1780 * @sdev: scsi device to cancel commands
1781 * @type: type of error recovery being performed
1783 * This sends a cancel to the VIOS for the specified device. This does
1784 * NOT send any abort to the actual device. That must be done separately.
1787 * 0 on success / other on failure
1789 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1791 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1792 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1793 struct ibmvfc_tmf *tmf;
1794 struct ibmvfc_event *evt, *found_evt;
1795 union ibmvfc_iu rsp;
1796 int rsp_rc = -EBUSY;
1797 unsigned long flags;
1801 spin_lock_irqsave(vhost->host->host_lock, flags);
1803 list_for_each_entry(evt, &vhost->sent, queue) {
1804 if (evt->cmnd && evt->cmnd->device == sdev) {
1811 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1812 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1813 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1817 if (vhost->state == IBMVFC_ACTIVE) {
1818 evt = ibmvfc_get_event(vhost);
1819 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1822 memset(tmf, 0, sizeof(*tmf));
1823 tmf->common.version = 1;
1824 tmf->common.opcode = IBMVFC_TMF_MAD;
1825 tmf->common.length = sizeof(*tmf);
1826 tmf->scsi_id = rport->port_id;
1827 int_to_scsilun(sdev->lun, &tmf->lun);
1828 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1829 tmf->cancel_key = (unsigned long)sdev->hostdata;
1830 tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata);
1832 evt->sync_iu = &rsp;
1833 init_completion(&evt->comp);
1834 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1837 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1840 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1844 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1846 wait_for_completion(&evt->comp);
1847 status = rsp.mad_common.status;
1848 spin_lock_irqsave(vhost->host->host_lock, flags);
1849 ibmvfc_free_event(evt);
1850 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1852 if (status != IBMVFC_MAD_SUCCESS) {
1853 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1857 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1862 * ibmvfc_eh_abort_handler - Abort a command
1863 * @cmd: scsi command to abort
1868 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
1870 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1871 struct ibmvfc_event *evt, *pos;
1872 int cancel_rc, abort_rc;
1873 unsigned long flags;
1876 ibmvfc_wait_while_resetting(vhost);
1877 cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET);
1878 abort_rc = ibmvfc_abort_task_set(cmd->device);
1880 if (!cancel_rc && !abort_rc) {
1881 spin_lock_irqsave(vhost->host->host_lock, flags);
1882 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
1883 if (evt->cmnd && evt->cmnd->device == cmd->device)
1884 ibmvfc_fail_request(evt, DID_ABORT);
1886 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1896 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1897 * @cmd: scsi command struct
1902 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
1904 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1905 struct ibmvfc_event *evt, *pos;
1906 int cancel_rc, reset_rc;
1907 unsigned long flags;
1910 ibmvfc_wait_while_resetting(vhost);
1911 cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET);
1912 reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN");
1914 if (!cancel_rc && !reset_rc) {
1915 spin_lock_irqsave(vhost->host->host_lock, flags);
1916 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
1917 if (evt->cmnd && evt->cmnd->device == cmd->device)
1918 ibmvfc_fail_request(evt, DID_ABORT);
1920 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1930 * ibmvfc_dev_cancel_all - Device iterated cancel all function
1931 * @sdev: scsi device struct
1932 * @data: return code
1935 static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
1937 unsigned long *rc = data;
1938 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
1942 * ibmvfc_dev_abort_all - Device iterated abort task set function
1943 * @sdev: scsi device struct
1944 * @data: return code
1947 static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
1949 unsigned long *rc = data;
1950 *rc |= ibmvfc_abort_task_set(sdev);
1954 * ibmvfc_eh_target_reset_handler - Reset the target
1955 * @cmd: scsi command struct
1960 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
1962 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1963 struct scsi_target *starget = scsi_target(cmd->device);
1964 struct ibmvfc_event *evt, *pos;
1966 unsigned long cancel_rc = 0;
1967 unsigned long flags;
1970 ibmvfc_wait_while_resetting(vhost);
1971 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
1972 reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target");
1974 if (!cancel_rc && !reset_rc) {
1975 spin_lock_irqsave(vhost->host->host_lock, flags);
1976 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
1977 if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
1978 ibmvfc_fail_request(evt, DID_ABORT);
1980 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1990 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
1991 * @cmd: struct scsi_cmnd having problems
1994 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
1997 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1999 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2000 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2001 return rc ? FAILED : SUCCESS;
2005 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2006 * @rport: rport struct
2011 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2013 struct scsi_target *starget = to_scsi_target(&rport->dev);
2014 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2015 struct ibmvfc_host *vhost = shost_priv(shost);
2016 struct ibmvfc_event *evt, *pos;
2017 unsigned long cancel_rc = 0;
2018 unsigned long abort_rc = 0;
2019 unsigned long flags;
2022 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2023 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2025 if (!cancel_rc && !abort_rc) {
2026 spin_lock_irqsave(shost->host_lock, flags);
2027 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
2028 if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
2029 ibmvfc_fail_request(evt, DID_ABORT);
2031 spin_unlock_irqrestore(shost->host_lock, flags);
2033 ibmvfc_issue_fc_host_lip(shost);
2035 scsi_target_unblock(&rport->dev);
2039 static const struct {
2040 enum ibmvfc_async_event ae;
2043 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2044 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2045 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2046 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2047 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2048 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2049 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2050 { IBMVFC_AE_LINK_UP, "Link Up" },
2051 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2052 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2053 { IBMVFC_AE_HALT, "Halt" },
2054 { IBMVFC_AE_RESUME, "Resume" },
2055 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2058 static const char *unknown_ae = "Unknown async";
2061 * ibmvfc_get_ae_desc - Get text description for async event
2065 static const char *ibmvfc_get_ae_desc(u64 ae)
2069 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2070 if (ae_desc[i].ae == ae)
2071 return ae_desc[i].desc;
2077 * ibmvfc_handle_async - Handle an async event from the adapter
2078 * @crq: crq to process
2079 * @vhost: ibmvfc host struct
2082 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2083 struct ibmvfc_host *vhost)
2085 const char *desc = ibmvfc_get_ae_desc(crq->event);
2087 ibmvfc_log(vhost, 3, "%s event received\n", desc);
2089 switch (crq->event) {
2090 case IBMVFC_AE_LINK_UP:
2091 case IBMVFC_AE_RESUME:
2092 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2093 ibmvfc_init_host(vhost, 1);
2095 case IBMVFC_AE_SCN_FABRIC:
2096 vhost->events_to_log |= IBMVFC_AE_RSCN;
2097 ibmvfc_init_host(vhost, 1);
2099 case IBMVFC_AE_SCN_NPORT:
2100 case IBMVFC_AE_SCN_GROUP:
2101 case IBMVFC_AE_SCN_DOMAIN:
2102 vhost->events_to_log |= IBMVFC_AE_RSCN;
2103 case IBMVFC_AE_ELS_LOGO:
2104 case IBMVFC_AE_ELS_PRLO:
2105 case IBMVFC_AE_ELS_PLOGI:
2106 ibmvfc_reinit_host(vhost);
2108 case IBMVFC_AE_LINK_DOWN:
2109 case IBMVFC_AE_ADAPTER_FAILED:
2110 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2112 case IBMVFC_AE_LINK_DEAD:
2113 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2115 case IBMVFC_AE_HALT:
2116 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2119 dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event);
2125 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2126 * @crq: Command/Response queue
2127 * @vhost: ibmvfc host struct
2130 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2133 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2135 switch (crq->valid) {
2136 case IBMVFC_CRQ_INIT_RSP:
2137 switch (crq->format) {
2138 case IBMVFC_CRQ_INIT:
2139 dev_info(vhost->dev, "Partner initialized\n");
2140 /* Send back a response */
2141 rc = ibmvfc_send_crq_init_complete(vhost);
2143 ibmvfc_init_host(vhost, 0);
2145 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2147 case IBMVFC_CRQ_INIT_COMPLETE:
2148 dev_info(vhost->dev, "Partner initialization complete\n");
2149 ibmvfc_init_host(vhost, 0);
2152 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2155 case IBMVFC_CRQ_XPORT_EVENT:
2156 vhost->state = IBMVFC_NO_CRQ;
2157 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2158 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2159 /* We need to re-setup the interpartition connection */
2160 dev_info(vhost->dev, "Re-enabling adapter\n");
2161 vhost->client_migrated = 1;
2162 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2163 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2164 (rc = ibmvfc_send_crq_init(vhost))) {
2165 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2166 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2168 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2170 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2172 ibmvfc_purge_requests(vhost, DID_ERROR);
2173 if ((rc = ibmvfc_reset_crq(vhost)) ||
2174 (rc = ibmvfc_send_crq_init(vhost))) {
2175 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2176 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2178 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2181 case IBMVFC_CRQ_CMD_RSP:
2184 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2188 if (crq->format == IBMVFC_ASYNC_EVENT)
2191 /* The only kind of payload CRQs we should get are responses to
2192 * things we send. Make sure this response is to something we
2195 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2196 dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n",
2201 if (unlikely(atomic_read(&evt->free))) {
2202 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n",
2207 del_timer(&evt->timer);
2208 list_del(&evt->queue);
2209 ibmvfc_trc_end(evt);
2214 * ibmvfc_scan_finished - Check if the device scan is done.
2215 * @shost: scsi host struct
2216 * @time: current elapsed time
2219 * 0 if scan is not done / 1 if scan is done
2221 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2223 unsigned long flags;
2224 struct ibmvfc_host *vhost = shost_priv(shost);
2227 spin_lock_irqsave(shost->host_lock, flags);
2228 if (time >= (init_timeout * HZ)) {
2229 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2230 "continuing initialization\n", init_timeout);
2234 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE)
2236 spin_unlock_irqrestore(shost->host_lock, flags);
2241 * ibmvfc_slave_alloc - Setup the device's task set value
2242 * @sdev: struct scsi_device device to configure
2244 * Set the device's task set value so that error handling works as
2248 * 0 on success / -ENXIO if device does not exist
2250 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2252 struct Scsi_Host *shost = sdev->host;
2253 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2254 struct ibmvfc_host *vhost = shost_priv(shost);
2255 unsigned long flags = 0;
2257 if (!rport || fc_remote_port_chkready(rport))
2260 spin_lock_irqsave(shost->host_lock, flags);
2261 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2262 spin_unlock_irqrestore(shost->host_lock, flags);
2267 * ibmvfc_slave_configure - Configure the device
2268 * @sdev: struct scsi_device device to configure
2270 * Enable allow_restart for a device if it is a disk. Adjust the
2271 * queue_depth here also.
2276 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2278 struct Scsi_Host *shost = sdev->host;
2279 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2280 unsigned long flags = 0;
2282 spin_lock_irqsave(shost->host_lock, flags);
2283 if (sdev->type == TYPE_DISK)
2284 sdev->allow_restart = 1;
2286 if (sdev->tagged_supported) {
2287 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2288 scsi_activate_tcq(sdev, sdev->queue_depth);
2290 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2292 rport->dev_loss_tmo = dev_loss_tmo;
2293 spin_unlock_irqrestore(shost->host_lock, flags);
2298 * ibmvfc_change_queue_depth - Change the device's queue depth
2299 * @sdev: scsi device struct
2300 * @qdepth: depth to set
2305 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2307 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2308 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2310 scsi_adjust_queue_depth(sdev, 0, qdepth);
2311 return sdev->queue_depth;
2315 * ibmvfc_change_queue_type - Change the device's queue type
2316 * @sdev: scsi device struct
2317 * @tag_type: type of tags to use
2320 * actual queue type set
2322 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2324 if (sdev->tagged_supported) {
2325 scsi_set_tag_type(sdev, tag_type);
2328 scsi_activate_tcq(sdev, sdev->queue_depth);
2330 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2337 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2338 struct device_attribute *attr, char *buf)
2340 struct Scsi_Host *shost = class_to_shost(dev);
2341 struct ibmvfc_host *vhost = shost_priv(shost);
2343 return snprintf(buf, PAGE_SIZE, "%s\n",
2344 vhost->login_buf->resp.partition_name);
2347 static struct device_attribute ibmvfc_host_partition_name = {
2349 .name = "partition_name",
2352 .show = ibmvfc_show_host_partition_name,
2355 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2356 struct device_attribute *attr, char *buf)
2358 struct Scsi_Host *shost = class_to_shost(dev);
2359 struct ibmvfc_host *vhost = shost_priv(shost);
2361 return snprintf(buf, PAGE_SIZE, "%s\n",
2362 vhost->login_buf->resp.device_name);
2365 static struct device_attribute ibmvfc_host_device_name = {
2367 .name = "device_name",
2370 .show = ibmvfc_show_host_device_name,
2373 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2374 struct device_attribute *attr, char *buf)
2376 struct Scsi_Host *shost = class_to_shost(dev);
2377 struct ibmvfc_host *vhost = shost_priv(shost);
2379 return snprintf(buf, PAGE_SIZE, "%s\n",
2380 vhost->login_buf->resp.port_loc_code);
2383 static struct device_attribute ibmvfc_host_loc_code = {
2385 .name = "port_loc_code",
2388 .show = ibmvfc_show_host_loc_code,
2391 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2392 struct device_attribute *attr, char *buf)
2394 struct Scsi_Host *shost = class_to_shost(dev);
2395 struct ibmvfc_host *vhost = shost_priv(shost);
2397 return snprintf(buf, PAGE_SIZE, "%s\n",
2398 vhost->login_buf->resp.drc_name);
2401 static struct device_attribute ibmvfc_host_drc_name = {
2406 .show = ibmvfc_show_host_drc_name,
2409 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2410 struct device_attribute *attr, char *buf)
2412 struct Scsi_Host *shost = class_to_shost(dev);
2413 struct ibmvfc_host *vhost = shost_priv(shost);
2414 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2417 static struct device_attribute ibmvfc_host_npiv_version = {
2419 .name = "npiv_version",
2422 .show = ibmvfc_show_host_npiv_version,
2426 * ibmvfc_show_log_level - Show the adapter's error logging level
2427 * @dev: class device struct
2431 * number of bytes printed to buffer
2433 static ssize_t ibmvfc_show_log_level(struct device *dev,
2434 struct device_attribute *attr, char *buf)
2436 struct Scsi_Host *shost = class_to_shost(dev);
2437 struct ibmvfc_host *vhost = shost_priv(shost);
2438 unsigned long flags = 0;
2441 spin_lock_irqsave(shost->host_lock, flags);
2442 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2443 spin_unlock_irqrestore(shost->host_lock, flags);
2448 * ibmvfc_store_log_level - Change the adapter's error logging level
2449 * @dev: class device struct
2453 * number of bytes printed to buffer
2455 static ssize_t ibmvfc_store_log_level(struct device *dev,
2456 struct device_attribute *attr,
2457 const char *buf, size_t count)
2459 struct Scsi_Host *shost = class_to_shost(dev);
2460 struct ibmvfc_host *vhost = shost_priv(shost);
2461 unsigned long flags = 0;
2463 spin_lock_irqsave(shost->host_lock, flags);
2464 vhost->log_level = simple_strtoul(buf, NULL, 10);
2465 spin_unlock_irqrestore(shost->host_lock, flags);
2469 static struct device_attribute ibmvfc_log_level_attr = {
2471 .name = "log_level",
2472 .mode = S_IRUGO | S_IWUSR,
2474 .show = ibmvfc_show_log_level,
2475 .store = ibmvfc_store_log_level
2478 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2480 * ibmvfc_read_trace - Dump the adapter trace
2481 * @kobj: kobject struct
2482 * @bin_attr: bin_attribute struct
2485 * @count: buffer size
2488 * number of bytes printed to buffer
2490 static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2491 struct bin_attribute *bin_attr,
2492 char *buf, loff_t off, size_t count)
2494 struct device *dev = container_of(kobj, struct device, kobj);
2495 struct Scsi_Host *shost = class_to_shost(dev);
2496 struct ibmvfc_host *vhost = shost_priv(shost);
2497 unsigned long flags = 0;
2498 int size = IBMVFC_TRACE_SIZE;
2499 char *src = (char *)vhost->trace;
2503 if (off + count > size) {
2508 spin_lock_irqsave(shost->host_lock, flags);
2509 memcpy(buf, &src[off], count);
2510 spin_unlock_irqrestore(shost->host_lock, flags);
2514 static struct bin_attribute ibmvfc_trace_attr = {
2520 .read = ibmvfc_read_trace,
2524 static struct device_attribute *ibmvfc_attrs[] = {
2525 &ibmvfc_host_partition_name,
2526 &ibmvfc_host_device_name,
2527 &ibmvfc_host_loc_code,
2528 &ibmvfc_host_drc_name,
2529 &ibmvfc_host_npiv_version,
2530 &ibmvfc_log_level_attr,
2534 static struct scsi_host_template driver_template = {
2535 .module = THIS_MODULE,
2536 .name = "IBM POWER Virtual FC Adapter",
2537 .proc_name = IBMVFC_NAME,
2538 .queuecommand = ibmvfc_queuecommand,
2539 .eh_abort_handler = ibmvfc_eh_abort_handler,
2540 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2541 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2542 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2543 .slave_alloc = ibmvfc_slave_alloc,
2544 .slave_configure = ibmvfc_slave_configure,
2545 .scan_finished = ibmvfc_scan_finished,
2546 .change_queue_depth = ibmvfc_change_queue_depth,
2547 .change_queue_type = ibmvfc_change_queue_type,
2549 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2551 .sg_tablesize = SG_ALL,
2552 .max_sectors = IBMVFC_MAX_SECTORS,
2553 .use_clustering = ENABLE_CLUSTERING,
2554 .shost_attrs = ibmvfc_attrs,
2558 * ibmvfc_next_async_crq - Returns the next entry in async queue
2559 * @vhost: ibmvfc host struct
2562 * Pointer to next entry in queue / NULL if empty
2564 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2566 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2567 struct ibmvfc_async_crq *crq;
2569 crq = &async_crq->msgs[async_crq->cur];
2570 if (crq->valid & 0x80) {
2571 if (++async_crq->cur == async_crq->size)
2580 * ibmvfc_next_crq - Returns the next entry in message queue
2581 * @vhost: ibmvfc host struct
2584 * Pointer to next entry in queue / NULL if empty
2586 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2588 struct ibmvfc_crq_queue *queue = &vhost->crq;
2589 struct ibmvfc_crq *crq;
2591 crq = &queue->msgs[queue->cur];
2592 if (crq->valid & 0x80) {
2593 if (++queue->cur == queue->size)
2602 * ibmvfc_interrupt - Interrupt handler
2603 * @irq: number of irq to handle, not used
2604 * @dev_instance: ibmvfc_host that received interrupt
2609 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2611 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
2612 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2613 struct ibmvfc_crq *crq;
2614 struct ibmvfc_async_crq *async;
2615 unsigned long flags;
2618 spin_lock_irqsave(vhost->host->host_lock, flags);
2619 vio_disable_interrupts(to_vio_dev(vhost->dev));
2621 /* Pull all the valid messages off the CRQ */
2622 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2623 ibmvfc_handle_crq(crq, vhost);
2627 /* Pull all the valid messages off the async CRQ */
2628 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2629 ibmvfc_handle_async(async, vhost);
2633 vio_enable_interrupts(vdev);
2634 if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2635 vio_disable_interrupts(vdev);
2636 ibmvfc_handle_crq(crq, vhost);
2638 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2639 vio_disable_interrupts(vdev);
2640 ibmvfc_handle_async(async, vhost);
2646 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2651 * ibmvfc_init_tgt - Set the next init job step for the target
2652 * @tgt: ibmvfc target struct
2653 * @job_step: job step to perform
2656 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2657 void (*job_step) (struct ibmvfc_target *))
2659 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2660 tgt->job_step = job_step;
2661 wake_up(&tgt->vhost->work_wait_q);
2665 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2666 * @tgt: ibmvfc target struct
2667 * @job_step: initialization job step
2670 static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
2671 void (*job_step) (struct ibmvfc_target *))
2673 if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) {
2674 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2675 wake_up(&tgt->vhost->work_wait_q);
2677 ibmvfc_init_tgt(tgt, job_step);
2681 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2682 * @evt: ibmvfc event struct
2685 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2687 struct ibmvfc_target *tgt = evt->tgt;
2688 struct ibmvfc_host *vhost = evt->vhost;
2689 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
2690 u32 status = rsp->common.status;
2692 vhost->discovery_threads--;
2693 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2695 case IBMVFC_MAD_SUCCESS:
2696 tgt_dbg(tgt, "Process Login succeeded\n");
2697 tgt->need_login = 0;
2698 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT);
2700 case IBMVFC_MAD_DRIVER_FAILED:
2702 case IBMVFC_MAD_CRQ_ERROR:
2703 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2705 case IBMVFC_MAD_FAILED:
2707 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2708 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2709 rsp->status, rsp->error, status);
2710 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2711 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2715 kref_put(&tgt->kref, ibmvfc_release_tgt);
2716 ibmvfc_free_event(evt);
2717 wake_up(&vhost->work_wait_q);
2721 * ibmvfc_tgt_send_prli - Send a process login
2722 * @tgt: ibmvfc target struct
2725 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2727 struct ibmvfc_process_login *prli;
2728 struct ibmvfc_host *vhost = tgt->vhost;
2729 struct ibmvfc_event *evt;
2731 if (vhost->discovery_threads >= disc_threads)
2734 kref_get(&tgt->kref);
2735 evt = ibmvfc_get_event(vhost);
2736 vhost->discovery_threads++;
2737 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2739 prli = &evt->iu.prli;
2740 memset(prli, 0, sizeof(*prli));
2741 prli->common.version = 1;
2742 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2743 prli->common.length = sizeof(*prli);
2744 prli->scsi_id = tgt->scsi_id;
2746 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2747 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2748 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2750 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2751 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2752 vhost->discovery_threads--;
2753 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2754 kref_put(&tgt->kref, ibmvfc_release_tgt);
2756 tgt_dbg(tgt, "Sent process login\n");
2760 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2761 * @evt: ibmvfc event struct
2764 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
2766 struct ibmvfc_target *tgt = evt->tgt;
2767 struct ibmvfc_host *vhost = evt->vhost;
2768 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
2769 u32 status = rsp->common.status;
2771 vhost->discovery_threads--;
2772 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2774 case IBMVFC_MAD_SUCCESS:
2775 tgt_dbg(tgt, "Port Login succeeded\n");
2776 if (tgt->ids.port_name &&
2777 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
2779 tgt_dbg(tgt, "Port re-init required\n");
2782 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
2783 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
2784 tgt->ids.port_id = tgt->scsi_id;
2785 tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET;
2786 memcpy(&tgt->service_parms, &rsp->service_parms,
2787 sizeof(tgt->service_parms));
2788 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
2789 sizeof(tgt->service_parms_change));
2790 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
2792 case IBMVFC_MAD_DRIVER_FAILED:
2794 case IBMVFC_MAD_CRQ_ERROR:
2795 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2797 case IBMVFC_MAD_FAILED:
2799 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2800 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
2801 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
2802 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
2804 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2805 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2809 kref_put(&tgt->kref, ibmvfc_release_tgt);
2810 ibmvfc_free_event(evt);
2811 wake_up(&vhost->work_wait_q);
2815 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
2816 * @tgt: ibmvfc target struct
2819 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
2821 struct ibmvfc_port_login *plogi;
2822 struct ibmvfc_host *vhost = tgt->vhost;
2823 struct ibmvfc_event *evt;
2825 if (vhost->discovery_threads >= disc_threads)
2828 kref_get(&tgt->kref);
2829 evt = ibmvfc_get_event(vhost);
2830 vhost->discovery_threads++;
2831 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2832 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
2834 plogi = &evt->iu.plogi;
2835 memset(plogi, 0, sizeof(*plogi));
2836 plogi->common.version = 1;
2837 plogi->common.opcode = IBMVFC_PORT_LOGIN;
2838 plogi->common.length = sizeof(*plogi);
2839 plogi->scsi_id = tgt->scsi_id;
2841 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2842 vhost->discovery_threads--;
2843 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2844 kref_put(&tgt->kref, ibmvfc_release_tgt);
2846 tgt_dbg(tgt, "Sent port login\n");
2850 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
2851 * @evt: ibmvfc event struct
2854 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
2856 struct ibmvfc_target *tgt = evt->tgt;
2857 struct ibmvfc_host *vhost = evt->vhost;
2858 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
2859 u32 status = rsp->common.status;
2861 vhost->discovery_threads--;
2862 ibmvfc_free_event(evt);
2863 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2866 case IBMVFC_MAD_SUCCESS:
2867 tgt_dbg(tgt, "Implicit Logout succeeded\n");
2869 case IBMVFC_MAD_DRIVER_FAILED:
2870 kref_put(&tgt->kref, ibmvfc_release_tgt);
2871 wake_up(&vhost->work_wait_q);
2873 case IBMVFC_MAD_FAILED:
2875 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
2879 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
2880 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
2881 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
2882 tgt->scsi_id != tgt->new_scsi_id)
2883 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2884 kref_put(&tgt->kref, ibmvfc_release_tgt);
2885 wake_up(&vhost->work_wait_q);
2889 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
2890 * @tgt: ibmvfc target struct
2893 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
2895 struct ibmvfc_implicit_logout *mad;
2896 struct ibmvfc_host *vhost = tgt->vhost;
2897 struct ibmvfc_event *evt;
2899 if (vhost->discovery_threads >= disc_threads)
2902 kref_get(&tgt->kref);
2903 evt = ibmvfc_get_event(vhost);
2904 vhost->discovery_threads++;
2905 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
2907 mad = &evt->iu.implicit_logout;
2908 memset(mad, 0, sizeof(*mad));
2909 mad->common.version = 1;
2910 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
2911 mad->common.length = sizeof(*mad);
2912 mad->old_scsi_id = tgt->scsi_id;
2914 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2915 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2916 vhost->discovery_threads--;
2917 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2918 kref_put(&tgt->kref, ibmvfc_release_tgt);
2920 tgt_dbg(tgt, "Sent Implicit Logout\n");
2924 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
2925 * @mad: ibmvfc passthru mad struct
2926 * @tgt: ibmvfc target struct
2929 * 1 if PLOGI needed / 0 if PLOGI not needed
2931 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
2932 struct ibmvfc_target *tgt)
2934 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
2935 sizeof(tgt->ids.port_name)))
2937 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
2938 sizeof(tgt->ids.node_name)))
2940 if (mad->fc_iu.response[6] != tgt->scsi_id)
2946 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
2947 * @evt: ibmvfc event struct
2950 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
2952 struct ibmvfc_target *tgt = evt->tgt;
2953 struct ibmvfc_host *vhost = evt->vhost;
2954 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
2955 u32 status = mad->common.status;
2956 u8 fc_reason, fc_explain;
2958 vhost->discovery_threads--;
2959 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2962 case IBMVFC_MAD_SUCCESS:
2963 tgt_dbg(tgt, "ADISC succeeded\n");
2964 if (ibmvfc_adisc_needs_plogi(mad, tgt))
2965 tgt->need_login = 1;
2967 case IBMVFC_MAD_DRIVER_FAILED:
2969 case IBMVFC_MAD_FAILED:
2971 tgt->need_login = 1;
2972 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
2973 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
2974 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2975 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
2976 mad->iu.status, mad->iu.error,
2977 ibmvfc_get_fc_type(fc_reason), fc_reason,
2978 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
2982 kref_put(&tgt->kref, ibmvfc_release_tgt);
2983 ibmvfc_free_event(evt);
2984 wake_up(&vhost->work_wait_q);
2988 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
2989 * @evt: ibmvfc event struct
2992 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
2994 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
2996 memset(mad, 0, sizeof(*mad));
2997 mad->common.version = 1;
2998 mad->common.opcode = IBMVFC_PASSTHRU;
2999 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3000 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3001 offsetof(struct ibmvfc_passthru_mad, iu);
3002 mad->cmd_ioba.len = sizeof(mad->iu);
3003 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3004 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3005 mad->iu.cmd.va = (u64)evt->crq.ioba +
3006 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3007 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3008 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3009 mad->iu.rsp.va = (u64)evt->crq.ioba +
3010 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3011 offsetof(struct ibmvfc_passthru_fc_iu, response);
3012 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3016 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3017 * @tgt: ibmvfc target struct
3020 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3022 struct ibmvfc_passthru_mad *mad;
3023 struct ibmvfc_host *vhost = tgt->vhost;
3024 struct ibmvfc_event *evt;
3026 if (vhost->discovery_threads >= disc_threads)
3029 kref_get(&tgt->kref);
3030 evt = ibmvfc_get_event(vhost);
3031 vhost->discovery_threads++;
3032 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3035 ibmvfc_init_passthru(evt);
3036 mad = &evt->iu.passthru;
3037 mad->iu.flags = IBMVFC_FC_ELS;
3038 mad->iu.scsi_id = tgt->scsi_id;
3040 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3041 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3042 sizeof(vhost->login_buf->resp.port_name));
3043 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3044 sizeof(vhost->login_buf->resp.node_name));
3045 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3047 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3048 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3049 vhost->discovery_threads--;
3050 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3051 kref_put(&tgt->kref, ibmvfc_release_tgt);
3053 tgt_dbg(tgt, "Sent ADISC\n");
3057 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3058 * @evt: ibmvfc event struct
3061 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3063 struct ibmvfc_target *tgt = evt->tgt;
3064 struct ibmvfc_host *vhost = evt->vhost;
3065 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3066 u32 status = rsp->common.status;
3068 vhost->discovery_threads--;
3069 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3071 case IBMVFC_MAD_SUCCESS:
3072 tgt_dbg(tgt, "Query Target succeeded\n");
3073 tgt->new_scsi_id = rsp->scsi_id;
3074 if (rsp->scsi_id != tgt->scsi_id)
3075 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3077 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3079 case IBMVFC_MAD_DRIVER_FAILED:
3081 case IBMVFC_MAD_CRQ_ERROR:
3082 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3084 case IBMVFC_MAD_FAILED:
3086 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3087 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3088 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3089 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3091 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3092 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3093 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3094 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3095 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3096 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3100 kref_put(&tgt->kref, ibmvfc_release_tgt);
3101 ibmvfc_free_event(evt);
3102 wake_up(&vhost->work_wait_q);
3106 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3107 * @tgt: ibmvfc target struct
3110 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3112 struct ibmvfc_query_tgt *query_tgt;
3113 struct ibmvfc_host *vhost = tgt->vhost;
3114 struct ibmvfc_event *evt;
3116 if (vhost->discovery_threads >= disc_threads)
3119 kref_get(&tgt->kref);
3120 evt = ibmvfc_get_event(vhost);
3121 vhost->discovery_threads++;
3123 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3124 query_tgt = &evt->iu.query_tgt;
3125 memset(query_tgt, 0, sizeof(*query_tgt));
3126 query_tgt->common.version = 1;
3127 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3128 query_tgt->common.length = sizeof(*query_tgt);
3129 query_tgt->wwpn = tgt->ids.port_name;
3131 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3132 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3133 vhost->discovery_threads--;
3134 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3135 kref_put(&tgt->kref, ibmvfc_release_tgt);
3137 tgt_dbg(tgt, "Sent Query Target\n");
3141 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3142 * @vhost: ibmvfc host struct
3143 * @scsi_id: SCSI ID to allocate target for
3146 * 0 on success / other on failure
3148 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3150 struct ibmvfc_target *tgt;
3151 unsigned long flags;
3153 spin_lock_irqsave(vhost->host->host_lock, flags);
3154 list_for_each_entry(tgt, &vhost->targets, queue) {
3155 if (tgt->scsi_id == scsi_id) {
3156 if (tgt->need_login)
3157 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3161 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3163 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
3165 dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n",
3170 tgt->scsi_id = scsi_id;
3171 tgt->new_scsi_id = scsi_id;
3173 tgt->need_login = 1;
3174 kref_init(&tgt->kref);
3175 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3176 spin_lock_irqsave(vhost->host->host_lock, flags);
3177 list_add_tail(&tgt->queue, &vhost->targets);
3180 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3185 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3186 * @vhost: ibmvfc host struct
3189 * 0 on success / other on failure
3191 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3195 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3196 rc = ibmvfc_alloc_target(vhost,
3197 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3203 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3204 * @evt: ibmvfc event struct
3207 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3209 struct ibmvfc_host *vhost = evt->vhost;
3210 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3211 u32 mad_status = rsp->common.status;
3213 switch (mad_status) {
3214 case IBMVFC_MAD_SUCCESS:
3215 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3216 vhost->num_targets = rsp->num_written;
3217 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3219 case IBMVFC_MAD_FAILED:
3220 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n",
3221 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3222 ibmvfc_retry_host_init(vhost);
3224 case IBMVFC_MAD_DRIVER_FAILED:
3227 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3228 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3232 ibmvfc_free_event(evt);
3233 wake_up(&vhost->work_wait_q);
3237 * ibmvfc_discover_targets - Send Discover Targets MAD
3238 * @vhost: ibmvfc host struct
3241 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3243 struct ibmvfc_discover_targets *mad;
3244 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3246 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3247 mad = &evt->iu.discover_targets;
3248 memset(mad, 0, sizeof(*mad));
3249 mad->common.version = 1;
3250 mad->common.opcode = IBMVFC_DISC_TARGETS;
3251 mad->common.length = sizeof(*mad);
3252 mad->bufflen = vhost->disc_buf_sz;
3253 mad->buffer.va = vhost->disc_buf_dma;
3254 mad->buffer.len = vhost->disc_buf_sz;
3255 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3257 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3258 ibmvfc_dbg(vhost, "Sent discover targets\n");
3260 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3264 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3265 * @evt: ibmvfc event struct
3268 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3270 struct ibmvfc_host *vhost = evt->vhost;
3271 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3272 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3273 unsigned int npiv_max_sectors;
3275 switch (mad_status) {
3276 case IBMVFC_MAD_SUCCESS:
3277 ibmvfc_free_event(evt);
3279 case IBMVFC_MAD_FAILED:
3280 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n",
3281 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3282 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3283 ibmvfc_retry_host_init(vhost);
3285 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3286 ibmvfc_free_event(evt);
3288 case IBMVFC_MAD_CRQ_ERROR:
3289 ibmvfc_retry_host_init(vhost);
3290 case IBMVFC_MAD_DRIVER_FAILED:
3291 ibmvfc_free_event(evt);
3294 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3295 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3296 ibmvfc_free_event(evt);
3300 vhost->client_migrated = 0;
3302 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3303 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3305 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3306 wake_up(&vhost->work_wait_q);
3310 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3311 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3313 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3314 wake_up(&vhost->work_wait_q);
3318 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3319 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3320 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3321 rsp->drc_name, npiv_max_sectors);
3323 fc_host_fabric_name(vhost->host) = rsp->node_name;
3324 fc_host_node_name(vhost->host) = rsp->node_name;
3325 fc_host_port_name(vhost->host) = rsp->port_name;
3326 fc_host_port_id(vhost->host) = rsp->scsi_id;
3327 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3328 fc_host_supported_classes(vhost->host) = 0;
3329 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3330 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3331 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3332 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3333 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3334 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3335 fc_host_maxframe_size(vhost->host) =
3336 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3338 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3339 vhost->host->max_sectors = npiv_max_sectors;
3340 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3341 wake_up(&vhost->work_wait_q);
3345 * ibmvfc_npiv_login - Sends NPIV login
3346 * @vhost: ibmvfc host struct
3349 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3351 struct ibmvfc_npiv_login_mad *mad;
3352 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3354 ibmvfc_gather_partition_info(vhost);
3355 ibmvfc_set_login_info(vhost);
3356 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3358 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3359 mad = &evt->iu.npiv_login;
3360 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3361 mad->common.version = 1;
3362 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3363 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3364 mad->buffer.va = vhost->login_buf_dma;
3365 mad->buffer.len = sizeof(*vhost->login_buf);
3367 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3369 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3370 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3372 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3376 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3377 * @vhost: ibmvfc host struct
3380 * 1 if work to do / 0 if not
3382 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3384 struct ibmvfc_target *tgt;
3386 list_for_each_entry(tgt, &vhost->targets, queue) {
3387 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3388 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3396 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3397 * @vhost: ibmvfc host struct
3400 * 1 if work to do / 0 if not
3402 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3404 struct ibmvfc_target *tgt;
3406 if (kthread_should_stop())
3408 switch (vhost->action) {
3409 case IBMVFC_HOST_ACTION_NONE:
3410 case IBMVFC_HOST_ACTION_INIT_WAIT:
3412 case IBMVFC_HOST_ACTION_TGT_INIT:
3413 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3414 if (vhost->discovery_threads == disc_threads)
3416 list_for_each_entry(tgt, &vhost->targets, queue)
3417 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3419 list_for_each_entry(tgt, &vhost->targets, queue)
3420 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3423 case IBMVFC_HOST_ACTION_INIT:
3424 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3425 case IBMVFC_HOST_ACTION_TGT_ADD:
3426 case IBMVFC_HOST_ACTION_TGT_DEL:
3427 case IBMVFC_HOST_ACTION_QUERY:
3436 * ibmvfc_work_to_do - Is there task level work to do?
3437 * @vhost: ibmvfc host struct
3440 * 1 if work to do / 0 if not
3442 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3444 unsigned long flags;
3447 spin_lock_irqsave(vhost->host->host_lock, flags);
3448 rc = __ibmvfc_work_to_do(vhost);
3449 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3454 * ibmvfc_log_ae - Log async events if necessary
3455 * @vhost: ibmvfc host struct
3456 * @events: events to log
3459 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3461 if (events & IBMVFC_AE_RSCN)
3462 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3463 if ((events & IBMVFC_AE_LINKDOWN) &&
3464 vhost->state >= IBMVFC_HALTED)
3465 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3466 if ((events & IBMVFC_AE_LINKUP) &&
3467 vhost->state == IBMVFC_INITIALIZING)
3468 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3472 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3473 * @tgt: ibmvfc target struct
3476 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3478 struct ibmvfc_host *vhost = tgt->vhost;
3479 struct fc_rport *rport;
3480 unsigned long flags;
3482 tgt_dbg(tgt, "Adding rport\n");
3483 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3484 spin_lock_irqsave(vhost->host->host_lock, flags);
3486 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3488 tgt_dbg(tgt, "rport add succeeded\n");
3489 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3490 rport->supported_classes = 0;
3491 tgt->target_id = rport->scsi_target_id;
3492 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3493 rport->supported_classes |= FC_COS_CLASS1;
3494 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3495 rport->supported_classes |= FC_COS_CLASS2;
3496 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3497 rport->supported_classes |= FC_COS_CLASS3;
3499 tgt_dbg(tgt, "rport add failed\n");
3500 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3504 * ibmvfc_do_work - Do task level work
3505 * @vhost: ibmvfc host struct
3508 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3510 struct ibmvfc_target *tgt;
3511 unsigned long flags;
3512 struct fc_rport *rport;
3514 ibmvfc_log_ae(vhost, vhost->events_to_log);
3515 spin_lock_irqsave(vhost->host->host_lock, flags);
3516 vhost->events_to_log = 0;
3517 switch (vhost->action) {
3518 case IBMVFC_HOST_ACTION_NONE:
3519 case IBMVFC_HOST_ACTION_INIT_WAIT:
3521 case IBMVFC_HOST_ACTION_INIT:
3522 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
3523 vhost->job_step(vhost);
3525 case IBMVFC_HOST_ACTION_QUERY:
3526 list_for_each_entry(tgt, &vhost->targets, queue)
3527 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3530 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3531 list_for_each_entry(tgt, &vhost->targets, queue) {
3532 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3538 if (!ibmvfc_dev_init_to_do(vhost))
3539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3541 case IBMVFC_HOST_ACTION_TGT_DEL:
3542 list_for_each_entry(tgt, &vhost->targets, queue) {
3543 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3544 tgt_dbg(tgt, "Deleting rport\n");
3547 list_del(&tgt->queue);
3548 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3550 fc_remote_port_delete(rport);
3551 kref_put(&tgt->kref, ibmvfc_release_tgt);
3556 if (vhost->state == IBMVFC_INITIALIZING) {
3557 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3558 vhost->job_step = ibmvfc_discover_targets;
3560 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3561 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3562 scsi_unblock_requests(vhost->host);
3563 wake_up(&vhost->init_wait_q);
3567 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
3569 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3570 ibmvfc_alloc_targets(vhost);
3571 spin_lock_irqsave(vhost->host->host_lock, flags);
3573 case IBMVFC_HOST_ACTION_TGT_INIT:
3574 list_for_each_entry(tgt, &vhost->targets, queue) {
3575 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3581 if (!ibmvfc_dev_init_to_do(vhost)) {
3582 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3583 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD);
3584 vhost->init_retries = 0;
3585 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3586 scsi_unblock_requests(vhost->host);
3590 case IBMVFC_HOST_ACTION_TGT_ADD:
3591 list_for_each_entry(tgt, &vhost->targets, queue) {
3592 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) {
3593 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3594 ibmvfc_tgt_add_rport(tgt);
3596 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3597 tgt_dbg(tgt, "Deleting rport\n");
3600 list_del(&tgt->queue);
3601 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3603 fc_remote_port_delete(rport);
3604 kref_put(&tgt->kref, ibmvfc_release_tgt);
3609 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
3611 scsi_block_requests(vhost->host);
3612 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3614 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3615 wake_up(&vhost->init_wait_q);
3622 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3626 * ibmvfc_work - Do task level work
3627 * @data: ibmvfc host struct
3632 static int ibmvfc_work(void *data)
3634 struct ibmvfc_host *vhost = data;
3637 set_user_nice(current, -20);
3640 rc = wait_event_interruptible(vhost->work_wait_q,
3641 ibmvfc_work_to_do(vhost));
3645 if (kthread_should_stop())
3648 ibmvfc_do_work(vhost);
3651 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
3656 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3657 * @vhost: ibmvfc host struct
3659 * Allocates a page for messages, maps it for dma, and registers
3660 * the crq with the hypervisor.
3663 * zero on success / other on failure
3665 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
3667 int rc, retrc = -ENOMEM;
3668 struct device *dev = vhost->dev;
3669 struct vio_dev *vdev = to_vio_dev(dev);
3670 struct ibmvfc_crq_queue *crq = &vhost->crq;
3673 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
3678 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3679 crq->msg_token = dma_map_single(dev, crq->msgs,
3680 PAGE_SIZE, DMA_BIDIRECTIONAL);
3682 if (dma_mapping_error(dev, crq->msg_token))
3685 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3686 crq->msg_token, PAGE_SIZE);
3688 if (rc == H_RESOURCE)
3689 /* maybe kexecing and resource is busy. try a reset */
3690 retrc = rc = ibmvfc_reset_crq(vhost);
3693 dev_warn(dev, "Partner adapter not ready\n");
3695 dev_warn(dev, "Error %d opening adapter\n", rc);
3696 goto reg_crq_failed;
3701 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
3702 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
3703 goto req_irq_failed;
3706 if ((rc = vio_enable_interrupts(vdev))) {
3707 dev_err(dev, "Error %d enabling interrupts\n", rc);
3708 goto req_irq_failed;
3717 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3718 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3720 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3722 free_page((unsigned long)crq->msgs);
3727 * ibmvfc_free_mem - Free memory for vhost
3728 * @vhost: ibmvfc host struct
3733 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
3735 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3738 mempool_destroy(vhost->tgt_pool);
3739 kfree(vhost->trace);
3740 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
3741 vhost->disc_buf_dma);
3742 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
3743 vhost->login_buf, vhost->login_buf_dma);
3744 dma_pool_destroy(vhost->sg_pool);
3745 dma_unmap_single(vhost->dev, async_q->msg_token,
3746 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3747 free_page((unsigned long)async_q->msgs);
3752 * ibmvfc_alloc_mem - Allocate memory for vhost
3753 * @vhost: ibmvfc host struct
3756 * 0 on success / non-zero on failure
3758 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
3760 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3761 struct device *dev = vhost->dev;
3764 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
3765 if (!async_q->msgs) {
3766 dev_err(dev, "Couldn't allocate async queue.\n");
3770 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
3771 async_q->msg_token = dma_map_single(dev, async_q->msgs,
3772 async_q->size * sizeof(*async_q->msgs),
3775 if (dma_mapping_error(dev, async_q->msg_token)) {
3776 dev_err(dev, "Failed to map async queue\n");
3777 goto free_async_crq;
3780 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
3781 SG_ALL * sizeof(struct srp_direct_buf),
3782 sizeof(struct srp_direct_buf), 0);
3784 if (!vhost->sg_pool) {
3785 dev_err(dev, "Failed to allocate sg pool\n");
3786 goto unmap_async_crq;
3789 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
3790 &vhost->login_buf_dma, GFP_KERNEL);
3792 if (!vhost->login_buf) {
3793 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
3797 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
3798 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
3799 &vhost->disc_buf_dma, GFP_KERNEL);
3801 if (!vhost->disc_buf) {
3802 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
3803 goto free_login_buffer;
3806 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
3807 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
3810 goto free_disc_buffer;
3812 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
3813 sizeof(struct ibmvfc_target));
3815 if (!vhost->tgt_pool) {
3816 dev_err(dev, "Couldn't allocate target memory pool\n");
3824 kfree(vhost->trace);
3826 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
3827 vhost->disc_buf_dma);
3829 dma_free_coherent(dev, sizeof(*vhost->login_buf),
3830 vhost->login_buf, vhost->login_buf_dma);
3832 dma_pool_destroy(vhost->sg_pool);
3834 dma_unmap_single(dev, async_q->msg_token,
3835 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3837 free_page((unsigned long)async_q->msgs);
3844 * ibmvfc_probe - Adapter hot plug add entry point
3845 * @vdev: vio device struct
3846 * @id: vio device id struct
3849 * 0 on success / non-zero on failure
3851 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
3853 struct ibmvfc_host *vhost;
3854 struct Scsi_Host *shost;
3855 struct device *dev = &vdev->dev;
3859 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
3861 dev_err(dev, "Couldn't allocate host data\n");
3865 shost->transportt = ibmvfc_transport_template;
3866 shost->can_queue = max_requests;
3867 shost->max_lun = max_lun;
3868 shost->max_id = max_targets;
3869 shost->max_sectors = IBMVFC_MAX_SECTORS;
3870 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
3871 shost->unique_id = shost->host_no;
3873 vhost = shost_priv(shost);
3874 INIT_LIST_HEAD(&vhost->sent);
3875 INIT_LIST_HEAD(&vhost->free);
3876 INIT_LIST_HEAD(&vhost->targets);
3877 sprintf(vhost->name, IBMVFC_NAME);
3878 vhost->host = shost;
3880 vhost->partition_number = -1;
3881 vhost->log_level = log_level;
3882 strcpy(vhost->partition_name, "UNKNOWN");
3883 init_waitqueue_head(&vhost->work_wait_q);
3884 init_waitqueue_head(&vhost->init_wait_q);
3886 if ((rc = ibmvfc_alloc_mem(vhost)))
3887 goto free_scsi_host;
3889 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
3892 if (IS_ERR(vhost->work_thread)) {
3893 dev_err(dev, "Couldn't create kernel thread: %ld\n",
3894 PTR_ERR(vhost->work_thread));
3898 if ((rc = ibmvfc_init_crq(vhost))) {
3899 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3903 if ((rc = ibmvfc_init_event_pool(vhost))) {
3904 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
3908 if ((rc = scsi_add_host(shost, dev)))
3909 goto release_event_pool;
3911 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
3912 &ibmvfc_trace_attr))) {
3913 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
3917 dev_set_drvdata(dev, vhost);
3918 spin_lock(&ibmvfc_driver_lock);
3919 list_add_tail(&vhost->queue, &ibmvfc_head);
3920 spin_unlock(&ibmvfc_driver_lock);
3922 ibmvfc_send_crq_init(vhost);
3923 scsi_scan_host(shost);
3927 scsi_remove_host(shost);
3929 ibmvfc_free_event_pool(vhost);
3931 ibmvfc_release_crq_queue(vhost);
3933 kthread_stop(vhost->work_thread);
3935 ibmvfc_free_mem(vhost);
3937 scsi_host_put(shost);
3944 * ibmvfc_remove - Adapter hot plug remove entry point
3945 * @vdev: vio device struct
3950 static int ibmvfc_remove(struct vio_dev *vdev)
3952 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
3953 unsigned long flags;
3956 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
3957 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
3958 ibmvfc_wait_while_resetting(vhost);
3959 ibmvfc_release_crq_queue(vhost);
3960 kthread_stop(vhost->work_thread);
3961 fc_remove_host(vhost->host);
3962 scsi_remove_host(vhost->host);
3964 spin_lock_irqsave(vhost->host->host_lock, flags);
3965 ibmvfc_purge_requests(vhost, DID_ERROR);
3966 ibmvfc_free_event_pool(vhost);
3967 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3969 ibmvfc_free_mem(vhost);
3970 spin_lock(&ibmvfc_driver_lock);
3971 list_del(&vhost->queue);
3972 spin_unlock(&ibmvfc_driver_lock);
3973 scsi_host_put(vhost->host);
3979 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
3980 * @vdev: vio device struct
3983 * Number of bytes the driver will need to DMA map at the same time in
3984 * order to perform well.
3986 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
3988 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
3989 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
3992 static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
3993 {"fcp", "IBM,vfc-client"},
3996 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
3998 static struct vio_driver ibmvfc_driver = {
3999 .id_table = ibmvfc_device_table,
4000 .probe = ibmvfc_probe,
4001 .remove = ibmvfc_remove,
4002 .get_desired_dma = ibmvfc_get_desired_dma,
4004 .name = IBMVFC_NAME,
4005 .owner = THIS_MODULE,
4009 static struct fc_function_template ibmvfc_transport_functions = {
4010 .show_host_fabric_name = 1,
4011 .show_host_node_name = 1,
4012 .show_host_port_name = 1,
4013 .show_host_supported_classes = 1,
4014 .show_host_port_type = 1,
4015 .show_host_port_id = 1,
4017 .get_host_port_state = ibmvfc_get_host_port_state,
4018 .show_host_port_state = 1,
4020 .get_host_speed = ibmvfc_get_host_speed,
4021 .show_host_speed = 1,
4023 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4024 .terminate_rport_io = ibmvfc_terminate_rport_io,
4026 .show_rport_maxframe_size = 1,
4027 .show_rport_supported_classes = 1,
4029 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4030 .show_rport_dev_loss_tmo = 1,
4032 .get_starget_node_name = ibmvfc_get_starget_node_name,
4033 .show_starget_node_name = 1,
4035 .get_starget_port_name = ibmvfc_get_starget_port_name,
4036 .show_starget_port_name = 1,
4038 .get_starget_port_id = ibmvfc_get_starget_port_id,
4039 .show_starget_port_id = 1,
4043 * ibmvfc_module_init - Initialize the ibmvfc module
4046 * 0 on success / other on failure
4048 static int __init ibmvfc_module_init(void)
4052 if (!firmware_has_feature(FW_FEATURE_VIO))
4055 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4056 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4058 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4059 if (!ibmvfc_transport_template)
4062 rc = vio_register_driver(&ibmvfc_driver);
4064 fc_release_transport(ibmvfc_transport_template);
4069 * ibmvfc_module_exit - Teardown the ibmvfc module
4074 static void __exit ibmvfc_module_exit(void)
4076 vio_unregister_driver(&ibmvfc_driver);
4077 fc_release_transport(ibmvfc_transport_template);
4080 module_init(ibmvfc_module_init);
4081 module_exit(ibmvfc_module_exit);