2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
34 #include <linux/stringify.h>
35 #include <asm/firmware.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_tcq.h>
43 #include <scsi/scsi_transport_fc.h>
44 #include <scsi/scsi_bsg_fc.h>
47 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
48 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
49 static unsigned int max_lun = IBMVFC_MAX_LUN;
50 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
51 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
52 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
53 static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
54 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
55 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
56 static LIST_HEAD(ibmvfc_head);
57 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
58 static struct scsi_transport_template *ibmvfc_transport_template;
60 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
61 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
62 MODULE_LICENSE("GPL");
63 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
65 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
66 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
68 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
69 MODULE_PARM_DESC(default_timeout,
70 "Default timeout in seconds for initialization and EH commands. "
71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
72 module_param_named(max_requests, max_requests, uint, S_IRUGO);
73 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
75 module_param_named(max_lun, max_lun, uint, S_IRUGO);
76 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
77 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
78 module_param_named(max_targets, max_targets, uint, S_IRUGO);
79 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
80 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
81 module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
82 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
84 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
85 MODULE_PARM_DESC(debug, "Enable driver debug information. "
86 "[Default=" __stringify(IBMVFC_DEBUG) "]");
87 module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
88 MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
89 "transport should insulate the loss of a remote port. Once this "
90 "value is exceeded, the scsi target is removed. "
91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
92 module_param_named(log_level, log_level, uint, 0);
93 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
116 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
117 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
125 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
126 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
127 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
128 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
133 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
134 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
135 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
136 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
138 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
139 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
140 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
142 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
145 static void ibmvfc_npiv_login(struct ibmvfc_host *);
146 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
147 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
148 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
149 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
151 static const char *unknown_error = "unknown error";
153 #ifdef CONFIG_SCSI_IBMVFC_TRACE
155 * ibmvfc_trc_start - Log a start trace entry
156 * @evt: ibmvfc event struct
159 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
161 struct ibmvfc_host *vhost = evt->vhost;
162 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
163 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
164 struct ibmvfc_trace_entry *entry;
166 entry = &vhost->trace[vhost->trace_index++];
168 entry->time = jiffies;
169 entry->fmt = evt->crq.format;
170 entry->type = IBMVFC_TRC_START;
172 switch (entry->fmt) {
173 case IBMVFC_CMD_FORMAT:
174 entry->op_code = vfc_cmd->iu.cdb[0];
175 entry->scsi_id = vfc_cmd->tgt_scsi_id;
176 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
177 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
178 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
180 case IBMVFC_MAD_FORMAT:
181 entry->op_code = mad->opcode;
189 * ibmvfc_trc_end - Log an end trace entry
190 * @evt: ibmvfc event struct
193 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
195 struct ibmvfc_host *vhost = evt->vhost;
196 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
197 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
198 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
201 entry->time = jiffies;
202 entry->fmt = evt->crq.format;
203 entry->type = IBMVFC_TRC_END;
205 switch (entry->fmt) {
206 case IBMVFC_CMD_FORMAT:
207 entry->op_code = vfc_cmd->iu.cdb[0];
208 entry->scsi_id = vfc_cmd->tgt_scsi_id;
209 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
210 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
211 entry->u.end.status = vfc_cmd->status;
212 entry->u.end.error = vfc_cmd->error;
213 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
214 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
215 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
217 case IBMVFC_MAD_FORMAT:
218 entry->op_code = mad->opcode;
219 entry->u.end.status = mad->status;
228 #define ibmvfc_trc_start(evt) do { } while (0)
229 #define ibmvfc_trc_end(evt) do { } while (0)
233 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
234 * @status: status / error class
238 * index into cmd_status / -EINVAL on failure
240 static int ibmvfc_get_err_index(u16 status, u16 error)
244 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
245 if ((cmd_status[i].status & status) == cmd_status[i].status &&
246 cmd_status[i].error == error)
253 * ibmvfc_get_cmd_error - Find the error description for the fcp response
254 * @status: status / error class
258 * error description string
260 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
262 int rc = ibmvfc_get_err_index(status, error);
264 return cmd_status[rc].name;
265 return unknown_error;
269 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
270 * @vfc_cmd: ibmvfc command struct
273 * SCSI result value to return for completed command
275 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
278 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
279 int fc_rsp_len = rsp->fcp_rsp_len;
281 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
282 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
283 rsp->data.info.rsp_code))
284 return DID_ERROR << 16;
286 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
288 return rsp->scsi_status | (cmd_status[err].result << 16);
289 return rsp->scsi_status | (DID_ERROR << 16);
293 * ibmvfc_retry_cmd - Determine if error status is retryable
294 * @status: status / error class
298 * 1 if error should be retried / 0 if it should not
300 static int ibmvfc_retry_cmd(u16 status, u16 error)
302 int rc = ibmvfc_get_err_index(status, error);
305 return cmd_status[rc].retry;
309 static const char *unknown_fc_explain = "unknown fc explain";
311 static const struct {
315 { 0x00, "no additional explanation" },
316 { 0x01, "service parameter error - options" },
317 { 0x03, "service parameter error - initiator control" },
318 { 0x05, "service parameter error - recipient control" },
319 { 0x07, "service parameter error - received data field size" },
320 { 0x09, "service parameter error - concurrent seq" },
321 { 0x0B, "service parameter error - credit" },
322 { 0x0D, "invalid N_Port/F_Port_Name" },
323 { 0x0E, "invalid node/Fabric Name" },
324 { 0x0F, "invalid common service parameters" },
325 { 0x11, "invalid association header" },
326 { 0x13, "association header required" },
327 { 0x15, "invalid originator S_ID" },
328 { 0x17, "invalid OX_ID-RX-ID combination" },
329 { 0x19, "command (request) already in progress" },
330 { 0x1E, "N_Port Login requested" },
331 { 0x1F, "Invalid N_Port_ID" },
334 static const struct {
338 { 0x00, "no additional explanation" },
339 { 0x01, "port identifier not registered" },
340 { 0x02, "port name not registered" },
341 { 0x03, "node name not registered" },
342 { 0x04, "class of service not registered" },
343 { 0x06, "initial process associator not registered" },
344 { 0x07, "FC-4 TYPEs not registered" },
345 { 0x08, "symbolic port name not registered" },
346 { 0x09, "symbolic node name not registered" },
347 { 0x0A, "port type not registered" },
348 { 0xF0, "authorization exception" },
349 { 0xF1, "authentication exception" },
350 { 0xF2, "data base full" },
351 { 0xF3, "data base empty" },
352 { 0xF4, "processing request" },
353 { 0xF5, "unable to verify connection" },
354 { 0xF6, "devices not in a common zone" },
358 * ibmvfc_get_ls_explain - Return the FC Explain description text
359 * @status: FC Explain status
364 static const char *ibmvfc_get_ls_explain(u16 status)
368 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
369 if (ls_explain[i].fc_explain == status)
370 return ls_explain[i].name;
372 return unknown_fc_explain;
376 * ibmvfc_get_gs_explain - Return the FC Explain description text
377 * @status: FC Explain status
382 static const char *ibmvfc_get_gs_explain(u16 status)
386 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
387 if (gs_explain[i].fc_explain == status)
388 return gs_explain[i].name;
390 return unknown_fc_explain;
393 static const struct {
394 enum ibmvfc_fc_type fc_type;
397 { IBMVFC_FABRIC_REJECT, "fabric reject" },
398 { IBMVFC_PORT_REJECT, "port reject" },
399 { IBMVFC_LS_REJECT, "ELS reject" },
400 { IBMVFC_FABRIC_BUSY, "fabric busy" },
401 { IBMVFC_PORT_BUSY, "port busy" },
402 { IBMVFC_BASIC_REJECT, "basic reject" },
405 static const char *unknown_fc_type = "unknown fc type";
408 * ibmvfc_get_fc_type - Return the FC Type description text
409 * @status: FC Type error status
414 static const char *ibmvfc_get_fc_type(u16 status)
418 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
419 if (fc_type[i].fc_type == status)
420 return fc_type[i].name;
422 return unknown_fc_type;
426 * ibmvfc_set_tgt_action - Set the next init action for the target
427 * @tgt: ibmvfc target struct
428 * @action: action to perform
431 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
432 enum ibmvfc_target_action action)
434 switch (tgt->action) {
435 case IBMVFC_TGT_ACTION_DEL_RPORT:
438 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
440 tgt->action = action;
446 * ibmvfc_set_host_state - Set the state for the host
447 * @vhost: ibmvfc host struct
448 * @state: state to set host to
451 * 0 if state changed / non-zero if not changed
453 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
454 enum ibmvfc_host_state state)
458 switch (vhost->state) {
459 case IBMVFC_HOST_OFFLINE:
463 vhost->state = state;
471 * ibmvfc_set_host_action - Set the next init action for the host
472 * @vhost: ibmvfc host struct
473 * @action: action to perform
476 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
477 enum ibmvfc_host_action action)
480 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
481 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
482 vhost->action = action;
484 case IBMVFC_HOST_ACTION_LOGO_WAIT:
485 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
486 vhost->action = action;
488 case IBMVFC_HOST_ACTION_INIT_WAIT:
489 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
490 vhost->action = action;
492 case IBMVFC_HOST_ACTION_QUERY:
493 switch (vhost->action) {
494 case IBMVFC_HOST_ACTION_INIT_WAIT:
495 case IBMVFC_HOST_ACTION_NONE:
496 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
497 vhost->action = action;
503 case IBMVFC_HOST_ACTION_TGT_INIT:
504 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
505 vhost->action = action;
507 case IBMVFC_HOST_ACTION_INIT:
508 case IBMVFC_HOST_ACTION_TGT_DEL:
509 switch (vhost->action) {
510 case IBMVFC_HOST_ACTION_RESET:
511 case IBMVFC_HOST_ACTION_REENABLE:
514 vhost->action = action;
518 case IBMVFC_HOST_ACTION_LOGO:
519 case IBMVFC_HOST_ACTION_QUERY_TGTS:
520 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
521 case IBMVFC_HOST_ACTION_NONE:
522 case IBMVFC_HOST_ACTION_RESET:
523 case IBMVFC_HOST_ACTION_REENABLE:
525 vhost->action = action;
531 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
532 * @vhost: ibmvfc host struct
537 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
539 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
540 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
541 scsi_block_requests(vhost->host);
542 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
547 wake_up(&vhost->work_wait_q);
551 * ibmvfc_link_down - Handle a link down event from the adapter
552 * @vhost: ibmvfc host struct
553 * @state: ibmvfc host state to enter
556 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
557 enum ibmvfc_host_state state)
559 struct ibmvfc_target *tgt;
562 scsi_block_requests(vhost->host);
563 list_for_each_entry(tgt, &vhost->targets, queue)
564 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
565 ibmvfc_set_host_state(vhost, state);
566 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
567 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
568 wake_up(&vhost->work_wait_q);
573 * ibmvfc_init_host - Start host initialization
574 * @vhost: ibmvfc host struct
579 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
581 struct ibmvfc_target *tgt;
583 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
584 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
586 "Host initialization retries exceeded. Taking adapter offline\n");
587 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
592 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
593 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
594 vhost->async_crq.cur = 0;
596 list_for_each_entry(tgt, &vhost->targets, queue)
597 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
598 scsi_block_requests(vhost->host);
599 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
600 vhost->job_step = ibmvfc_npiv_login;
601 wake_up(&vhost->work_wait_q);
606 * ibmvfc_send_crq - Send a CRQ
607 * @vhost: ibmvfc host struct
608 * @word1: the first 64 bits of the data
609 * @word2: the second 64 bits of the data
612 * 0 on success / other on failure
614 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
616 struct vio_dev *vdev = to_vio_dev(vhost->dev);
617 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
621 * ibmvfc_send_crq_init - Send a CRQ init message
622 * @vhost: ibmvfc host struct
625 * 0 on success / other on failure
627 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
629 ibmvfc_dbg(vhost, "Sending CRQ init\n");
630 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
634 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
635 * @vhost: ibmvfc host struct
638 * 0 on success / other on failure
640 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
642 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
643 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
647 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
648 * @vhost: ibmvfc host struct
650 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
651 * the crq with the hypervisor.
653 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
656 struct vio_dev *vdev = to_vio_dev(vhost->dev);
657 struct ibmvfc_crq_queue *crq = &vhost->crq;
659 ibmvfc_dbg(vhost, "Releasing CRQ\n");
660 free_irq(vdev->irq, vhost);
661 tasklet_kill(&vhost->tasklet);
665 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
666 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
668 vhost->state = IBMVFC_NO_CRQ;
669 vhost->logged_in = 0;
670 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
671 free_page((unsigned long)crq->msgs);
675 * ibmvfc_reenable_crq_queue - reenables the CRQ
676 * @vhost: ibmvfc host struct
679 * 0 on success / other on failure
681 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
684 struct vio_dev *vdev = to_vio_dev(vhost->dev);
686 /* Re-enable the CRQ */
690 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
691 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
694 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
700 * ibmvfc_reset_crq - resets a crq after a failure
701 * @vhost: ibmvfc host struct
704 * 0 on success / other on failure
706 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
710 struct vio_dev *vdev = to_vio_dev(vhost->dev);
711 struct ibmvfc_crq_queue *crq = &vhost->crq;
717 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
718 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
720 spin_lock_irqsave(vhost->host->host_lock, flags);
721 vhost->state = IBMVFC_NO_CRQ;
722 vhost->logged_in = 0;
723 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
725 /* Clean out the queue */
726 memset(crq->msgs, 0, PAGE_SIZE);
729 /* And re-open it again */
730 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
731 crq->msg_token, PAGE_SIZE);
734 /* Adapter is good, but other end is not ready */
735 dev_warn(vhost->dev, "Partner adapter not ready\n");
737 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
738 spin_unlock_irqrestore(vhost->host->host_lock, flags);
744 * ibmvfc_valid_event - Determines if event is valid.
745 * @pool: event_pool that contains the event
746 * @evt: ibmvfc event to be checked for validity
749 * 1 if event is valid / 0 if event is not valid
751 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
752 struct ibmvfc_event *evt)
754 int index = evt - pool->events;
755 if (index < 0 || index >= pool->size) /* outside of bounds */
757 if (evt != pool->events + index) /* unaligned */
763 * ibmvfc_free_event - Free the specified event
764 * @evt: ibmvfc_event to be freed
767 static void ibmvfc_free_event(struct ibmvfc_event *evt)
769 struct ibmvfc_host *vhost = evt->vhost;
770 struct ibmvfc_event_pool *pool = &vhost->pool;
772 BUG_ON(!ibmvfc_valid_event(pool, evt));
773 BUG_ON(atomic_inc_return(&evt->free) != 1);
774 list_add_tail(&evt->queue, &vhost->free);
778 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
779 * @evt: ibmvfc event struct
781 * This function does not setup any error status, that must be done
782 * before this function gets called.
784 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
786 struct scsi_cmnd *cmnd = evt->cmnd;
789 scsi_dma_unmap(cmnd);
790 cmnd->scsi_done(cmnd);
794 complete(evt->eh_comp);
796 ibmvfc_free_event(evt);
800 * ibmvfc_fail_request - Fail request with specified error code
801 * @evt: ibmvfc event struct
802 * @error_code: error code to fail request with
807 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
810 evt->cmnd->result = (error_code << 16);
811 evt->done = ibmvfc_scsi_eh_done;
813 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
815 list_del(&evt->queue);
816 del_timer(&evt->timer);
822 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
823 * @vhost: ibmvfc host struct
824 * @error_code: error code to fail requests with
829 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
831 struct ibmvfc_event *evt, *pos;
833 ibmvfc_dbg(vhost, "Purging all requests\n");
834 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
835 ibmvfc_fail_request(evt, error_code);
839 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
840 * @vhost: struct ibmvfc host to reset
842 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
844 ibmvfc_purge_requests(vhost, DID_ERROR);
845 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
850 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
851 * @vhost: struct ibmvfc host to reset
853 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
855 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
856 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
857 scsi_block_requests(vhost->host);
858 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
859 vhost->job_step = ibmvfc_npiv_logout;
860 wake_up(&vhost->work_wait_q);
862 ibmvfc_hard_reset_host(vhost);
866 * ibmvfc_reset_host - Reset the connection to the server
867 * @vhost: ibmvfc host struct
869 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
873 spin_lock_irqsave(vhost->host->host_lock, flags);
874 __ibmvfc_reset_host(vhost);
875 spin_unlock_irqrestore(vhost->host->host_lock, flags);
879 * ibmvfc_retry_host_init - Retry host initialization if allowed
880 * @vhost: ibmvfc host struct
882 * Returns: 1 if init will be retried / 0 if not
885 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
889 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
890 vhost->delay_init = 1;
891 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
893 "Host initialization retries exceeded. Taking adapter offline\n");
894 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
895 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
896 __ibmvfc_reset_host(vhost);
898 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
903 wake_up(&vhost->work_wait_q);
908 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
909 * @starget: scsi target struct
912 * ibmvfc_target struct / NULL if not found
914 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
916 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
917 struct ibmvfc_host *vhost = shost_priv(shost);
918 struct ibmvfc_target *tgt;
920 list_for_each_entry(tgt, &vhost->targets, queue)
921 if (tgt->target_id == starget->id) {
922 kref_get(&tgt->kref);
929 * ibmvfc_get_target - Find the specified scsi_target
930 * @starget: scsi target struct
933 * ibmvfc_target struct / NULL if not found
935 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
937 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
938 struct ibmvfc_target *tgt;
941 spin_lock_irqsave(shost->host_lock, flags);
942 tgt = __ibmvfc_get_target(starget);
943 spin_unlock_irqrestore(shost->host_lock, flags);
948 * ibmvfc_get_host_speed - Get host port speed
949 * @shost: scsi host struct
954 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
956 struct ibmvfc_host *vhost = shost_priv(shost);
959 spin_lock_irqsave(shost->host_lock, flags);
960 if (vhost->state == IBMVFC_ACTIVE) {
961 switch (vhost->login_buf->resp.link_speed / 100) {
963 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
966 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
969 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
972 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
975 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
978 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
981 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
982 vhost->login_buf->resp.link_speed / 100);
983 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
987 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
988 spin_unlock_irqrestore(shost->host_lock, flags);
992 * ibmvfc_get_host_port_state - Get host port state
993 * @shost: scsi host struct
998 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1000 struct ibmvfc_host *vhost = shost_priv(shost);
1001 unsigned long flags;
1003 spin_lock_irqsave(shost->host_lock, flags);
1004 switch (vhost->state) {
1005 case IBMVFC_INITIALIZING:
1007 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1009 case IBMVFC_LINK_DOWN:
1010 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1012 case IBMVFC_LINK_DEAD:
1013 case IBMVFC_HOST_OFFLINE:
1014 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1017 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1020 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1023 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1024 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1027 spin_unlock_irqrestore(shost->host_lock, flags);
1031 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1032 * @rport: rport struct
1033 * @timeout: timeout value
1038 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1041 rport->dev_loss_tmo = timeout;
1043 rport->dev_loss_tmo = 1;
1047 * ibmvfc_release_tgt - Free memory allocated for a target
1048 * @kref: kref struct
1051 static void ibmvfc_release_tgt(struct kref *kref)
1053 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1058 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1059 * @starget: scsi target struct
1064 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1066 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1067 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1069 kref_put(&tgt->kref, ibmvfc_release_tgt);
1073 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1074 * @starget: scsi target struct
1079 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1081 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1082 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1084 kref_put(&tgt->kref, ibmvfc_release_tgt);
1088 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1089 * @starget: scsi target struct
1094 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1096 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1097 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1099 kref_put(&tgt->kref, ibmvfc_release_tgt);
1103 * ibmvfc_wait_while_resetting - Wait while the host resets
1104 * @vhost: ibmvfc host struct
1107 * 0 on success / other on failure
1109 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1111 long timeout = wait_event_timeout(vhost->init_wait_q,
1112 ((vhost->state == IBMVFC_ACTIVE ||
1113 vhost->state == IBMVFC_HOST_OFFLINE ||
1114 vhost->state == IBMVFC_LINK_DEAD) &&
1115 vhost->action == IBMVFC_HOST_ACTION_NONE),
1116 (init_timeout * HZ));
1118 return timeout ? 0 : -EIO;
1122 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1123 * @shost: scsi host struct
1126 * 0 on success / other on failure
1128 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1130 struct ibmvfc_host *vhost = shost_priv(shost);
1132 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1133 ibmvfc_reset_host(vhost);
1134 return ibmvfc_wait_while_resetting(vhost);
1138 * ibmvfc_gather_partition_info - Gather info about the LPAR
1143 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1145 struct device_node *rootdn;
1147 const unsigned int *num;
1149 rootdn = of_find_node_by_path("/");
1153 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1155 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1156 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1158 vhost->partition_number = *num;
1159 of_node_put(rootdn);
1163 * ibmvfc_set_login_info - Setup info for NPIV login
1164 * @vhost: ibmvfc host struct
1169 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1171 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1172 struct device_node *of_node = vhost->dev->of_node;
1173 const char *location;
1175 memset(login_info, 0, sizeof(*login_info));
1177 login_info->ostype = IBMVFC_OS_LINUX;
1178 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1179 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1180 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1181 login_info->partition_num = vhost->partition_number;
1182 login_info->vfc_frame_version = 1;
1183 login_info->fcp_version = 3;
1184 login_info->flags = IBMVFC_FLUSH_ON_HALT;
1185 if (vhost->client_migrated)
1186 login_info->flags |= IBMVFC_CLIENT_MIGRATED;
1188 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1189 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1190 login_info->async.va = vhost->async_crq.msg_token;
1191 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
1192 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1193 strncpy(login_info->device_name,
1194 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1196 location = of_get_property(of_node, "ibm,loc-code", NULL);
1197 location = location ? location : dev_name(vhost->dev);
1198 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1202 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1203 * @vhost: ibmvfc host who owns the event pool
1205 * Returns zero on success.
1207 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1210 struct ibmvfc_event_pool *pool = &vhost->pool;
1213 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1214 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1218 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1219 pool->size * sizeof(*pool->iu_storage),
1220 &pool->iu_token, 0);
1222 if (!pool->iu_storage) {
1223 kfree(pool->events);
1227 for (i = 0; i < pool->size; ++i) {
1228 struct ibmvfc_event *evt = &pool->events[i];
1229 atomic_set(&evt->free, 1);
1230 evt->crq.valid = 0x80;
1231 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1232 evt->xfer_iu = pool->iu_storage + i;
1234 evt->ext_list = NULL;
1235 list_add_tail(&evt->queue, &vhost->free);
1243 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1244 * @vhost: ibmvfc host who owns the event pool
1247 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1250 struct ibmvfc_event_pool *pool = &vhost->pool;
1253 for (i = 0; i < pool->size; ++i) {
1254 list_del(&pool->events[i].queue);
1255 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1256 if (pool->events[i].ext_list)
1257 dma_pool_free(vhost->sg_pool,
1258 pool->events[i].ext_list,
1259 pool->events[i].ext_list_token);
1262 kfree(pool->events);
1263 dma_free_coherent(vhost->dev,
1264 pool->size * sizeof(*pool->iu_storage),
1265 pool->iu_storage, pool->iu_token);
1270 * ibmvfc_get_event - Gets the next free event in pool
1271 * @vhost: ibmvfc host struct
1273 * Returns a free event from the pool.
1275 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1277 struct ibmvfc_event *evt;
1279 BUG_ON(list_empty(&vhost->free));
1280 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1281 atomic_set(&evt->free, 0);
1282 list_del(&evt->queue);
1287 * ibmvfc_init_event - Initialize fields in an event struct that are always
1290 * @done: Routine to call when the event is responded to
1291 * @format: SRP or MAD format
1293 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1294 void (*done) (struct ibmvfc_event *), u8 format)
1297 evt->sync_iu = NULL;
1298 evt->crq.format = format;
1300 evt->eh_comp = NULL;
1304 * ibmvfc_map_sg_list - Initialize scatterlist
1305 * @scmd: scsi command struct
1306 * @nseg: number of scatterlist segments
1307 * @md: memory descriptor list to initialize
1309 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1310 struct srp_direct_buf *md)
1313 struct scatterlist *sg;
1315 scsi_for_each_sg(scmd, sg, nseg, i) {
1316 md[i].va = sg_dma_address(sg);
1317 md[i].len = sg_dma_len(sg);
1323 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1324 * @scmd: Scsi_Cmnd with the scatterlist
1325 * @evt: ibmvfc event struct
1326 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1327 * @dev: device for which to map dma memory
1330 * 0 on success / non-zero on failure
1332 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1333 struct ibmvfc_event *evt,
1334 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1338 struct srp_direct_buf *data = &vfc_cmd->ioba;
1339 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1341 sg_mapped = scsi_dma_map(scmd);
1343 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1345 } else if (unlikely(sg_mapped < 0)) {
1346 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1347 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1351 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1352 vfc_cmd->flags |= IBMVFC_WRITE;
1353 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1355 vfc_cmd->flags |= IBMVFC_READ;
1356 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1359 if (sg_mapped == 1) {
1360 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1364 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1366 if (!evt->ext_list) {
1367 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1368 &evt->ext_list_token);
1370 if (!evt->ext_list) {
1371 scsi_dma_unmap(scmd);
1372 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1373 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1378 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1380 data->va = evt->ext_list_token;
1381 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1387 * ibmvfc_timeout - Internal command timeout handler
1388 * @evt: struct ibmvfc_event that timed out
1390 * Called when an internally generated command times out
1392 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1394 struct ibmvfc_host *vhost = evt->vhost;
1395 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1396 ibmvfc_reset_host(vhost);
1400 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1401 * @evt: event to be sent
1402 * @vhost: ibmvfc host struct
1403 * @timeout: timeout in seconds - 0 means do not time command
1405 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1407 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1408 struct ibmvfc_host *vhost, unsigned long timeout)
1410 u64 *crq_as_u64 = (u64 *) &evt->crq;
1413 /* Copy the IU into the transfer area */
1414 *evt->xfer_iu = evt->iu;
1415 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1416 evt->xfer_iu->cmd.tag = (u64)evt;
1417 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1418 evt->xfer_iu->mad_common.tag = (u64)evt;
1422 list_add_tail(&evt->queue, &vhost->sent);
1423 init_timer(&evt->timer);
1426 evt->timer.data = (unsigned long) evt;
1427 evt->timer.expires = jiffies + (timeout * HZ);
1428 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1429 add_timer(&evt->timer);
1434 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1435 list_del(&evt->queue);
1436 del_timer(&evt->timer);
1438 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1439 * Firmware will send a CRQ with a transport event (0xFF) to
1440 * tell this client what has happened to the transport. This
1441 * will be handled in ibmvfc_handle_crq()
1443 if (rc == H_CLOSED) {
1444 if (printk_ratelimit())
1445 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1447 scsi_dma_unmap(evt->cmnd);
1448 ibmvfc_free_event(evt);
1449 return SCSI_MLQUEUE_HOST_BUSY;
1452 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1454 evt->cmnd->result = DID_ERROR << 16;
1455 evt->done = ibmvfc_scsi_eh_done;
1457 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1461 ibmvfc_trc_start(evt);
1467 * ibmvfc_log_error - Log an error for the failed command if appropriate
1468 * @evt: ibmvfc event to log
1471 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1473 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1474 struct ibmvfc_host *vhost = evt->vhost;
1475 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1476 struct scsi_cmnd *cmnd = evt->cmnd;
1477 const char *err = unknown_error;
1478 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1483 logerr = cmd_status[index].log;
1484 err = cmd_status[index].name;
1487 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1490 if (rsp->flags & FCP_RSP_LEN_VALID)
1491 rsp_code = rsp->data.info.rsp_code;
1493 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1494 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1495 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1496 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1500 * ibmvfc_relogin - Log back into the specified device
1501 * @sdev: scsi device struct
1504 static void ibmvfc_relogin(struct scsi_device *sdev)
1506 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1507 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1508 struct ibmvfc_target *tgt;
1510 list_for_each_entry(tgt, &vhost->targets, queue) {
1511 if (rport == tgt->rport) {
1512 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1517 ibmvfc_reinit_host(vhost);
1521 * ibmvfc_scsi_done - Handle responses from commands
1522 * @evt: ibmvfc event to be handled
1524 * Used as a callback when sending scsi cmds.
1526 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1528 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1529 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1530 struct scsi_cmnd *cmnd = evt->cmnd;
1532 u32 sense_len = rsp->fcp_sense_len;
1535 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1536 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1537 else if (rsp->flags & FCP_RESID_UNDER)
1538 scsi_set_resid(cmnd, rsp->fcp_resid);
1540 scsi_set_resid(cmnd, 0);
1542 if (vfc_cmd->status) {
1543 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1545 if (rsp->flags & FCP_RSP_LEN_VALID)
1546 rsp_len = rsp->fcp_rsp_len;
1547 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1548 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1549 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1550 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1551 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
1552 ibmvfc_relogin(cmnd->device);
1554 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1555 cmnd->result = (DID_ERROR << 16);
1557 ibmvfc_log_error(evt);
1560 if (!cmnd->result &&
1561 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1562 cmnd->result = (DID_ERROR << 16);
1564 scsi_dma_unmap(cmnd);
1565 cmnd->scsi_done(cmnd);
1569 complete(evt->eh_comp);
1571 ibmvfc_free_event(evt);
1575 * ibmvfc_host_chkready - Check if the host can accept commands
1576 * @vhost: struct ibmvfc host
1579 * 1 if host can accept command / 0 if not
1581 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1585 switch (vhost->state) {
1586 case IBMVFC_LINK_DEAD:
1587 case IBMVFC_HOST_OFFLINE:
1588 result = DID_NO_CONNECT << 16;
1591 case IBMVFC_INITIALIZING:
1593 case IBMVFC_LINK_DOWN:
1594 result = DID_REQUEUE << 16;
1605 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1606 * @cmnd: struct scsi_cmnd to be executed
1607 * @done: Callback function to be called when cmnd is completed
1610 * 0 on success / other on failure
1612 static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1613 void (*done) (struct scsi_cmnd *))
1615 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1616 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1617 struct ibmvfc_cmd *vfc_cmd;
1618 struct ibmvfc_event *evt;
1622 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1623 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1629 cmnd->result = (DID_OK << 16);
1630 evt = ibmvfc_get_event(vhost);
1631 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1633 cmnd->scsi_done = done;
1634 vfc_cmd = &evt->iu.cmd;
1635 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1636 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1637 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1638 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1639 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1640 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1641 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1642 vfc_cmd->tgt_scsi_id = rport->port_id;
1643 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1644 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1645 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1647 if (scsi_populate_tag_msg(cmnd, tag)) {
1648 vfc_cmd->task_tag = tag[1];
1650 case MSG_SIMPLE_TAG:
1651 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1654 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1656 case MSG_ORDERED_TAG:
1657 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1662 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1663 return ibmvfc_send_event(evt, vhost, 0);
1665 ibmvfc_free_event(evt);
1667 return SCSI_MLQUEUE_HOST_BUSY;
1669 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1670 scmd_printk(KERN_ERR, cmnd,
1671 "Failed to map DMA buffer for command. rc=%d\n", rc);
1673 cmnd->result = DID_ERROR << 16;
1679 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1680 * @evt: ibmvfc event struct
1683 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1685 /* copy the response back */
1687 *evt->sync_iu = *evt->xfer_iu;
1689 complete(&evt->comp);
1693 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1694 * @evt: struct ibmvfc_event
1697 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1699 struct ibmvfc_host *vhost = evt->vhost;
1701 ibmvfc_free_event(evt);
1702 vhost->aborting_passthru = 0;
1703 dev_info(vhost->dev, "Passthru command cancelled\n");
1707 * ibmvfc_bsg_timeout - Handle a BSG timeout
1708 * @job: struct fc_bsg_job that timed out
1711 * 0 on success / other on failure
1713 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
1715 struct ibmvfc_host *vhost = shost_priv(job->shost);
1716 unsigned long port_id = (unsigned long)job->dd_data;
1717 struct ibmvfc_event *evt;
1718 struct ibmvfc_tmf *tmf;
1719 unsigned long flags;
1723 spin_lock_irqsave(vhost->host->host_lock, flags);
1724 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1725 __ibmvfc_reset_host(vhost);
1726 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1730 vhost->aborting_passthru = 1;
1731 evt = ibmvfc_get_event(vhost);
1732 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1735 memset(tmf, 0, sizeof(*tmf));
1736 tmf->common.version = 1;
1737 tmf->common.opcode = IBMVFC_TMF_MAD;
1738 tmf->common.length = sizeof(*tmf);
1739 tmf->scsi_id = port_id;
1740 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
1741 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY;
1742 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1745 vhost->aborting_passthru = 0;
1746 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1749 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1752 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1759 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1760 * @vhost: struct ibmvfc_host to send command
1761 * @port_id: port ID to send command
1764 * 0 on success / other on failure
1766 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1768 struct ibmvfc_port_login *plogi;
1769 struct ibmvfc_target *tgt;
1770 struct ibmvfc_event *evt;
1771 union ibmvfc_iu rsp_iu;
1772 unsigned long flags;
1773 int rc = 0, issue_login = 1;
1776 spin_lock_irqsave(vhost->host->host_lock, flags);
1777 list_for_each_entry(tgt, &vhost->targets, queue) {
1778 if (tgt->scsi_id == port_id) {
1786 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1789 evt = ibmvfc_get_event(vhost);
1790 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1791 plogi = &evt->iu.plogi;
1792 memset(plogi, 0, sizeof(*plogi));
1793 plogi->common.version = 1;
1794 plogi->common.opcode = IBMVFC_PORT_LOGIN;
1795 plogi->common.length = sizeof(*plogi);
1796 plogi->scsi_id = port_id;
1797 evt->sync_iu = &rsp_iu;
1798 init_completion(&evt->comp);
1800 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1801 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1806 wait_for_completion(&evt->comp);
1808 if (rsp_iu.plogi.common.status)
1811 spin_lock_irqsave(vhost->host->host_lock, flags);
1812 ibmvfc_free_event(evt);
1814 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1820 * ibmvfc_bsg_request - Handle a BSG request
1821 * @job: struct fc_bsg_job to be executed
1824 * 0 on success / other on failure
1826 static int ibmvfc_bsg_request(struct fc_bsg_job *job)
1828 struct ibmvfc_host *vhost = shost_priv(job->shost);
1829 struct fc_rport *rport = job->rport;
1830 struct ibmvfc_passthru_mad *mad;
1831 struct ibmvfc_event *evt;
1832 union ibmvfc_iu rsp_iu;
1833 unsigned long flags, port_id = -1;
1834 unsigned int code = job->request->msgcode;
1835 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1836 u32 fc_flags, rsp_len;
1839 job->reply->reply_payload_rcv_len = 0;
1841 port_id = rport->port_id;
1844 case FC_BSG_HST_ELS_NOLOGIN:
1845 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
1846 (job->request->rqst_data.h_els.port_id[1] << 8) |
1847 job->request->rqst_data.h_els.port_id[2];
1848 case FC_BSG_RPT_ELS:
1849 fc_flags = IBMVFC_FC_ELS;
1853 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
1854 (job->request->rqst_data.h_ct.port_id[1] << 8) |
1855 job->request->rqst_data.h_ct.port_id[2];
1857 fc_flags = IBMVFC_FC_CT_IU;
1865 if (!mutex_trylock(&vhost->passthru_mutex))
1868 job->dd_data = (void *)port_id;
1869 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1870 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1873 mutex_unlock(&vhost->passthru_mutex);
1877 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1878 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1881 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1882 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1883 mutex_unlock(&vhost->passthru_mutex);
1887 if (req_seg > 1 || rsp_seg > 1) {
1893 rc = ibmvfc_bsg_plogi(vhost, port_id);
1895 spin_lock_irqsave(vhost->host->host_lock, flags);
1897 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1898 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1899 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1903 evt = ibmvfc_get_event(vhost);
1904 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1905 mad = &evt->iu.passthru;
1907 memset(mad, 0, sizeof(*mad));
1908 mad->common.version = 1;
1909 mad->common.opcode = IBMVFC_PASSTHRU;
1910 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
1912 mad->cmd_ioba.va = (u64)evt->crq.ioba +
1913 offsetof(struct ibmvfc_passthru_mad, iu);
1914 mad->cmd_ioba.len = sizeof(mad->iu);
1916 mad->iu.cmd_len = job->request_payload.payload_len;
1917 mad->iu.rsp_len = job->reply_payload.payload_len;
1918 mad->iu.flags = fc_flags;
1919 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
1921 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list);
1922 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list);
1923 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list);
1924 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list);
1925 mad->iu.scsi_id = port_id;
1926 mad->iu.tag = (u64)evt;
1927 rsp_len = mad->iu.rsp.len;
1929 evt->sync_iu = &rsp_iu;
1930 init_completion(&evt->comp);
1931 rc = ibmvfc_send_event(evt, vhost, 0);
1932 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1939 wait_for_completion(&evt->comp);
1941 if (rsp_iu.passthru.common.status)
1944 job->reply->reply_payload_rcv_len = rsp_len;
1946 spin_lock_irqsave(vhost->host->host_lock, flags);
1947 ibmvfc_free_event(evt);
1948 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1949 job->reply->result = rc;
1953 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1954 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1955 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1956 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1957 mutex_unlock(&vhost->passthru_mutex);
1963 * ibmvfc_reset_device - Reset the device with the specified reset type
1964 * @sdev: scsi device to reset
1966 * @desc: reset type description for log messages
1969 * 0 on success / other on failure
1971 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1973 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1974 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1975 struct ibmvfc_cmd *tmf;
1976 struct ibmvfc_event *evt = NULL;
1977 union ibmvfc_iu rsp_iu;
1978 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1979 int rsp_rc = -EBUSY;
1980 unsigned long flags;
1983 spin_lock_irqsave(vhost->host->host_lock, flags);
1984 if (vhost->state == IBMVFC_ACTIVE) {
1985 evt = ibmvfc_get_event(vhost);
1986 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1989 memset(tmf, 0, sizeof(*tmf));
1990 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1991 tmf->resp.len = sizeof(tmf->rsp);
1992 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1993 tmf->payload_len = sizeof(tmf->iu);
1994 tmf->resp_len = sizeof(tmf->rsp);
1995 tmf->cancel_key = (unsigned long)sdev->hostdata;
1996 tmf->tgt_scsi_id = rport->port_id;
1997 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1998 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1999 tmf->iu.tmf_flags = type;
2000 evt->sync_iu = &rsp_iu;
2002 init_completion(&evt->comp);
2003 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2005 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2008 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2013 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2014 wait_for_completion(&evt->comp);
2016 if (rsp_iu.cmd.status)
2017 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2020 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2021 rsp_code = fc_rsp->data.info.rsp_code;
2023 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2024 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2025 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
2026 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2027 fc_rsp->scsi_status);
2030 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2032 spin_lock_irqsave(vhost->host->host_lock, flags);
2033 ibmvfc_free_event(evt);
2034 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2039 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2040 * @sdev: scsi device to abort commands
2042 * This sends an Abort Task Set to the VIOS for the specified device. This does
2043 * NOT send any cancel to the VIOS. That must be done separately.
2046 * 0 on success / other on failure
2048 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2050 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2051 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2052 struct ibmvfc_cmd *tmf;
2053 struct ibmvfc_event *evt, *found_evt;
2054 union ibmvfc_iu rsp_iu;
2055 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2056 int rsp_rc = -EBUSY;
2057 unsigned long flags;
2060 spin_lock_irqsave(vhost->host->host_lock, flags);
2062 list_for_each_entry(evt, &vhost->sent, queue) {
2063 if (evt->cmnd && evt->cmnd->device == sdev) {
2070 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2071 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2072 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2076 if (vhost->state == IBMVFC_ACTIVE) {
2077 evt = ibmvfc_get_event(vhost);
2078 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2081 memset(tmf, 0, sizeof(*tmf));
2082 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
2083 tmf->resp.len = sizeof(tmf->rsp);
2084 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
2085 tmf->payload_len = sizeof(tmf->iu);
2086 tmf->resp_len = sizeof(tmf->rsp);
2087 tmf->cancel_key = (unsigned long)sdev->hostdata;
2088 tmf->tgt_scsi_id = rport->port_id;
2089 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2090 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
2091 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2092 evt->sync_iu = &rsp_iu;
2094 init_completion(&evt->comp);
2095 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2098 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2101 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2105 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2106 wait_for_completion(&evt->comp);
2108 if (rsp_iu.cmd.status)
2109 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2112 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2113 rsp_code = fc_rsp->data.info.rsp_code;
2115 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2116 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2117 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
2118 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2119 fc_rsp->scsi_status);
2122 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2124 spin_lock_irqsave(vhost->host->host_lock, flags);
2125 ibmvfc_free_event(evt);
2126 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2131 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2132 * @sdev: scsi device to cancel commands
2133 * @type: type of error recovery being performed
2135 * This sends a cancel to the VIOS for the specified device. This does
2136 * NOT send any abort to the actual device. That must be done separately.
2139 * 0 on success / other on failure
2141 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2143 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2144 struct scsi_target *starget = scsi_target(sdev);
2145 struct fc_rport *rport = starget_to_rport(starget);
2146 struct ibmvfc_tmf *tmf;
2147 struct ibmvfc_event *evt, *found_evt;
2148 union ibmvfc_iu rsp;
2149 int rsp_rc = -EBUSY;
2150 unsigned long flags;
2154 spin_lock_irqsave(vhost->host->host_lock, flags);
2156 list_for_each_entry(evt, &vhost->sent, queue) {
2157 if (evt->cmnd && evt->cmnd->device == sdev) {
2164 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2165 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2166 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2170 if (vhost->state == IBMVFC_ACTIVE) {
2171 evt = ibmvfc_get_event(vhost);
2172 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2175 memset(tmf, 0, sizeof(*tmf));
2176 tmf->common.version = 1;
2177 tmf->common.opcode = IBMVFC_TMF_MAD;
2178 tmf->common.length = sizeof(*tmf);
2179 tmf->scsi_id = rport->port_id;
2180 int_to_scsilun(sdev->lun, &tmf->lun);
2181 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
2182 tmf->cancel_key = (unsigned long)sdev->hostdata;
2183 tmf->my_cancel_key = (unsigned long)starget->hostdata;
2185 evt->sync_iu = &rsp;
2186 init_completion(&evt->comp);
2187 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2190 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2193 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2197 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2199 wait_for_completion(&evt->comp);
2200 status = rsp.mad_common.status;
2201 spin_lock_irqsave(vhost->host->host_lock, flags);
2202 ibmvfc_free_event(evt);
2203 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2205 if (status != IBMVFC_MAD_SUCCESS) {
2206 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2210 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2215 * ibmvfc_match_target - Match function for specified target
2216 * @evt: ibmvfc event struct
2217 * @device: device to match (starget)
2220 * 1 if event matches starget / 0 if event does not match starget
2222 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2224 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2230 * ibmvfc_match_lun - Match function for specified LUN
2231 * @evt: ibmvfc event struct
2232 * @device: device to match (sdev)
2235 * 1 if event matches sdev / 0 if event does not match sdev
2237 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2239 if (evt->cmnd && evt->cmnd->device == device)
2245 * ibmvfc_wait_for_ops - Wait for ops to complete
2246 * @vhost: ibmvfc host struct
2247 * @device: device to match (starget or sdev)
2248 * @match: match function
2253 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2254 int (*match) (struct ibmvfc_event *, void *))
2256 struct ibmvfc_event *evt;
2257 DECLARE_COMPLETION_ONSTACK(comp);
2259 unsigned long flags;
2260 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2265 spin_lock_irqsave(vhost->host->host_lock, flags);
2266 list_for_each_entry(evt, &vhost->sent, queue) {
2267 if (match(evt, device)) {
2268 evt->eh_comp = ∁
2272 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2275 timeout = wait_for_completion_timeout(&comp, timeout);
2279 spin_lock_irqsave(vhost->host->host_lock, flags);
2280 list_for_each_entry(evt, &vhost->sent, queue) {
2281 if (match(evt, device)) {
2282 evt->eh_comp = NULL;
2286 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2288 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2290 return wait ? FAILED : SUCCESS;
2300 * ibmvfc_eh_abort_handler - Abort a command
2301 * @cmd: scsi command to abort
2306 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2308 struct scsi_device *sdev = cmd->device;
2309 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2310 int cancel_rc, abort_rc;
2314 ibmvfc_wait_while_resetting(vhost);
2315 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2316 abort_rc = ibmvfc_abort_task_set(sdev);
2318 if (!cancel_rc && !abort_rc)
2319 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2326 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2327 * @cmd: scsi command struct
2332 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2334 struct scsi_device *sdev = cmd->device;
2335 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2336 int cancel_rc, reset_rc;
2340 ibmvfc_wait_while_resetting(vhost);
2341 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2342 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2344 if (!cancel_rc && !reset_rc)
2345 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2352 * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function
2353 * @sdev: scsi device struct
2354 * @data: return code
2357 static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data)
2359 unsigned long *rc = data;
2360 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2364 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2365 * @sdev: scsi device struct
2366 * @data: return code
2369 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2371 unsigned long *rc = data;
2372 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2376 * ibmvfc_dev_abort_all - Device iterated abort task set function
2377 * @sdev: scsi device struct
2378 * @data: return code
2381 static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2383 unsigned long *rc = data;
2384 *rc |= ibmvfc_abort_task_set(sdev);
2388 * ibmvfc_eh_target_reset_handler - Reset the target
2389 * @cmd: scsi command struct
2394 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2396 struct scsi_device *sdev = cmd->device;
2397 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2398 struct scsi_target *starget = scsi_target(sdev);
2401 unsigned long cancel_rc = 0;
2404 ibmvfc_wait_while_resetting(vhost);
2405 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2406 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2408 if (!cancel_rc && !reset_rc)
2409 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2416 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2417 * @cmd: struct scsi_cmnd having problems
2420 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2423 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2425 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2426 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2427 return rc ? FAILED : SUCCESS;
2431 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2432 * @rport: rport struct
2437 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2439 struct scsi_target *starget = to_scsi_target(&rport->dev);
2440 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2441 struct ibmvfc_host *vhost = shost_priv(shost);
2442 unsigned long cancel_rc = 0;
2443 unsigned long abort_rc = 0;
2447 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts);
2448 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2450 if (!cancel_rc && !abort_rc)
2451 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2454 ibmvfc_issue_fc_host_lip(shost);
2458 static const struct {
2459 enum ibmvfc_async_event ae;
2462 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2463 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2464 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2465 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2466 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2467 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2468 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2469 { IBMVFC_AE_LINK_UP, "Link Up" },
2470 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2471 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2472 { IBMVFC_AE_HALT, "Halt" },
2473 { IBMVFC_AE_RESUME, "Resume" },
2474 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2477 static const char *unknown_ae = "Unknown async";
2480 * ibmvfc_get_ae_desc - Get text description for async event
2484 static const char *ibmvfc_get_ae_desc(u64 ae)
2488 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2489 if (ae_desc[i].ae == ae)
2490 return ae_desc[i].desc;
2496 * ibmvfc_handle_async - Handle an async event from the adapter
2497 * @crq: crq to process
2498 * @vhost: ibmvfc host struct
2501 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2502 struct ibmvfc_host *vhost)
2504 const char *desc = ibmvfc_get_ae_desc(crq->event);
2505 struct ibmvfc_target *tgt;
2507 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2508 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
2510 switch (crq->event) {
2511 case IBMVFC_AE_RESUME:
2512 switch (crq->link_state) {
2513 case IBMVFC_AE_LS_LINK_DOWN:
2514 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2516 case IBMVFC_AE_LS_LINK_DEAD:
2517 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2519 case IBMVFC_AE_LS_LINK_UP:
2520 case IBMVFC_AE_LS_LINK_BOUNCED:
2522 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2523 vhost->delay_init = 1;
2524 __ibmvfc_reset_host(vhost);
2529 case IBMVFC_AE_LINK_UP:
2530 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2531 vhost->delay_init = 1;
2532 __ibmvfc_reset_host(vhost);
2534 case IBMVFC_AE_SCN_FABRIC:
2535 case IBMVFC_AE_SCN_DOMAIN:
2536 vhost->events_to_log |= IBMVFC_AE_RSCN;
2537 vhost->delay_init = 1;
2538 __ibmvfc_reset_host(vhost);
2540 case IBMVFC_AE_SCN_NPORT:
2541 case IBMVFC_AE_SCN_GROUP:
2542 vhost->events_to_log |= IBMVFC_AE_RSCN;
2543 ibmvfc_reinit_host(vhost);
2545 case IBMVFC_AE_ELS_LOGO:
2546 case IBMVFC_AE_ELS_PRLO:
2547 case IBMVFC_AE_ELS_PLOGI:
2548 list_for_each_entry(tgt, &vhost->targets, queue) {
2549 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2551 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id)
2553 if (crq->wwpn && tgt->ids.port_name != crq->wwpn)
2555 if (crq->node_name && tgt->ids.node_name != crq->node_name)
2557 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO)
2559 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) {
2560 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2561 ibmvfc_reinit_host(vhost);
2565 case IBMVFC_AE_LINK_DOWN:
2566 case IBMVFC_AE_ADAPTER_FAILED:
2567 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2569 case IBMVFC_AE_LINK_DEAD:
2570 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2572 case IBMVFC_AE_HALT:
2573 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2576 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2582 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2583 * @crq: Command/Response queue
2584 * @vhost: ibmvfc host struct
2587 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2590 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2592 switch (crq->valid) {
2593 case IBMVFC_CRQ_INIT_RSP:
2594 switch (crq->format) {
2595 case IBMVFC_CRQ_INIT:
2596 dev_info(vhost->dev, "Partner initialized\n");
2597 /* Send back a response */
2598 rc = ibmvfc_send_crq_init_complete(vhost);
2600 ibmvfc_init_host(vhost);
2602 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2604 case IBMVFC_CRQ_INIT_COMPLETE:
2605 dev_info(vhost->dev, "Partner initialization complete\n");
2606 ibmvfc_init_host(vhost);
2609 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2612 case IBMVFC_CRQ_XPORT_EVENT:
2613 vhost->state = IBMVFC_NO_CRQ;
2614 vhost->logged_in = 0;
2615 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2616 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2617 /* We need to re-setup the interpartition connection */
2618 dev_info(vhost->dev, "Re-enabling adapter\n");
2619 vhost->client_migrated = 1;
2620 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2621 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2622 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
2624 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2625 ibmvfc_purge_requests(vhost, DID_ERROR);
2626 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2627 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
2630 case IBMVFC_CRQ_CMD_RSP:
2633 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2637 if (crq->format == IBMVFC_ASYNC_EVENT)
2640 /* The only kind of payload CRQs we should get are responses to
2641 * things we send. Make sure this response is to something we
2644 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2645 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2650 if (unlikely(atomic_read(&evt->free))) {
2651 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2656 del_timer(&evt->timer);
2657 list_del(&evt->queue);
2658 ibmvfc_trc_end(evt);
2663 * ibmvfc_scan_finished - Check if the device scan is done.
2664 * @shost: scsi host struct
2665 * @time: current elapsed time
2668 * 0 if scan is not done / 1 if scan is done
2670 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2672 unsigned long flags;
2673 struct ibmvfc_host *vhost = shost_priv(shost);
2676 spin_lock_irqsave(shost->host_lock, flags);
2677 if (time >= (init_timeout * HZ)) {
2678 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2679 "continuing initialization\n", init_timeout);
2683 if (vhost->scan_complete)
2685 spin_unlock_irqrestore(shost->host_lock, flags);
2690 * ibmvfc_slave_alloc - Setup the device's task set value
2691 * @sdev: struct scsi_device device to configure
2693 * Set the device's task set value so that error handling works as
2697 * 0 on success / -ENXIO if device does not exist
2699 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2701 struct Scsi_Host *shost = sdev->host;
2702 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2703 struct ibmvfc_host *vhost = shost_priv(shost);
2704 unsigned long flags = 0;
2706 if (!rport || fc_remote_port_chkready(rport))
2709 spin_lock_irqsave(shost->host_lock, flags);
2710 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2711 spin_unlock_irqrestore(shost->host_lock, flags);
2716 * ibmvfc_target_alloc - Setup the target's task set value
2717 * @starget: struct scsi_target
2719 * Set the target's task set value so that error handling works as
2723 * 0 on success / -ENXIO if device does not exist
2725 static int ibmvfc_target_alloc(struct scsi_target *starget)
2727 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2728 struct ibmvfc_host *vhost = shost_priv(shost);
2729 unsigned long flags = 0;
2731 spin_lock_irqsave(shost->host_lock, flags);
2732 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2733 spin_unlock_irqrestore(shost->host_lock, flags);
2738 * ibmvfc_slave_configure - Configure the device
2739 * @sdev: struct scsi_device device to configure
2741 * Enable allow_restart for a device if it is a disk. Adjust the
2742 * queue_depth here also.
2747 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2749 struct Scsi_Host *shost = sdev->host;
2750 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2751 unsigned long flags = 0;
2753 spin_lock_irqsave(shost->host_lock, flags);
2754 if (sdev->type == TYPE_DISK)
2755 sdev->allow_restart = 1;
2757 if (sdev->tagged_supported) {
2758 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2759 scsi_activate_tcq(sdev, sdev->queue_depth);
2761 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2763 rport->dev_loss_tmo = dev_loss_tmo;
2764 spin_unlock_irqrestore(shost->host_lock, flags);
2769 * ibmvfc_change_queue_depth - Change the device's queue depth
2770 * @sdev: scsi device struct
2771 * @qdepth: depth to set
2772 * @reason: calling context
2777 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth,
2780 if (reason != SCSI_QDEPTH_DEFAULT)
2783 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2784 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2786 scsi_adjust_queue_depth(sdev, 0, qdepth);
2787 return sdev->queue_depth;
2791 * ibmvfc_change_queue_type - Change the device's queue type
2792 * @sdev: scsi device struct
2793 * @tag_type: type of tags to use
2796 * actual queue type set
2798 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2800 if (sdev->tagged_supported) {
2801 scsi_set_tag_type(sdev, tag_type);
2804 scsi_activate_tcq(sdev, sdev->queue_depth);
2806 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2813 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2814 struct device_attribute *attr, char *buf)
2816 struct Scsi_Host *shost = class_to_shost(dev);
2817 struct ibmvfc_host *vhost = shost_priv(shost);
2819 return snprintf(buf, PAGE_SIZE, "%s\n",
2820 vhost->login_buf->resp.partition_name);
2823 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2824 struct device_attribute *attr, char *buf)
2826 struct Scsi_Host *shost = class_to_shost(dev);
2827 struct ibmvfc_host *vhost = shost_priv(shost);
2829 return snprintf(buf, PAGE_SIZE, "%s\n",
2830 vhost->login_buf->resp.device_name);
2833 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2834 struct device_attribute *attr, char *buf)
2836 struct Scsi_Host *shost = class_to_shost(dev);
2837 struct ibmvfc_host *vhost = shost_priv(shost);
2839 return snprintf(buf, PAGE_SIZE, "%s\n",
2840 vhost->login_buf->resp.port_loc_code);
2843 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2844 struct device_attribute *attr, char *buf)
2846 struct Scsi_Host *shost = class_to_shost(dev);
2847 struct ibmvfc_host *vhost = shost_priv(shost);
2849 return snprintf(buf, PAGE_SIZE, "%s\n",
2850 vhost->login_buf->resp.drc_name);
2853 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2854 struct device_attribute *attr, char *buf)
2856 struct Scsi_Host *shost = class_to_shost(dev);
2857 struct ibmvfc_host *vhost = shost_priv(shost);
2858 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2861 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2862 struct device_attribute *attr, char *buf)
2864 struct Scsi_Host *shost = class_to_shost(dev);
2865 struct ibmvfc_host *vhost = shost_priv(shost);
2866 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2870 * ibmvfc_show_log_level - Show the adapter's error logging level
2871 * @dev: class device struct
2875 * number of bytes printed to buffer
2877 static ssize_t ibmvfc_show_log_level(struct device *dev,
2878 struct device_attribute *attr, char *buf)
2880 struct Scsi_Host *shost = class_to_shost(dev);
2881 struct ibmvfc_host *vhost = shost_priv(shost);
2882 unsigned long flags = 0;
2885 spin_lock_irqsave(shost->host_lock, flags);
2886 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2887 spin_unlock_irqrestore(shost->host_lock, flags);
2892 * ibmvfc_store_log_level - Change the adapter's error logging level
2893 * @dev: class device struct
2897 * number of bytes printed to buffer
2899 static ssize_t ibmvfc_store_log_level(struct device *dev,
2900 struct device_attribute *attr,
2901 const char *buf, size_t count)
2903 struct Scsi_Host *shost = class_to_shost(dev);
2904 struct ibmvfc_host *vhost = shost_priv(shost);
2905 unsigned long flags = 0;
2907 spin_lock_irqsave(shost->host_lock, flags);
2908 vhost->log_level = simple_strtoul(buf, NULL, 10);
2909 spin_unlock_irqrestore(shost->host_lock, flags);
2913 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
2914 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
2915 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
2916 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
2917 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
2918 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
2919 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
2920 ibmvfc_show_log_level, ibmvfc_store_log_level);
2922 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2924 * ibmvfc_read_trace - Dump the adapter trace
2925 * @filp: open sysfs file
2926 * @kobj: kobject struct
2927 * @bin_attr: bin_attribute struct
2930 * @count: buffer size
2933 * number of bytes printed to buffer
2935 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
2936 struct bin_attribute *bin_attr,
2937 char *buf, loff_t off, size_t count)
2939 struct device *dev = container_of(kobj, struct device, kobj);
2940 struct Scsi_Host *shost = class_to_shost(dev);
2941 struct ibmvfc_host *vhost = shost_priv(shost);
2942 unsigned long flags = 0;
2943 int size = IBMVFC_TRACE_SIZE;
2944 char *src = (char *)vhost->trace;
2948 if (off + count > size) {
2953 spin_lock_irqsave(shost->host_lock, flags);
2954 memcpy(buf, &src[off], count);
2955 spin_unlock_irqrestore(shost->host_lock, flags);
2959 static struct bin_attribute ibmvfc_trace_attr = {
2965 .read = ibmvfc_read_trace,
2969 static struct device_attribute *ibmvfc_attrs[] = {
2970 &dev_attr_partition_name,
2971 &dev_attr_device_name,
2972 &dev_attr_port_loc_code,
2974 &dev_attr_npiv_version,
2975 &dev_attr_capabilities,
2976 &dev_attr_log_level,
2980 static struct scsi_host_template driver_template = {
2981 .module = THIS_MODULE,
2982 .name = "IBM POWER Virtual FC Adapter",
2983 .proc_name = IBMVFC_NAME,
2984 .queuecommand = ibmvfc_queuecommand,
2985 .eh_abort_handler = ibmvfc_eh_abort_handler,
2986 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2987 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2988 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2989 .slave_alloc = ibmvfc_slave_alloc,
2990 .slave_configure = ibmvfc_slave_configure,
2991 .target_alloc = ibmvfc_target_alloc,
2992 .scan_finished = ibmvfc_scan_finished,
2993 .change_queue_depth = ibmvfc_change_queue_depth,
2994 .change_queue_type = ibmvfc_change_queue_type,
2996 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2998 .sg_tablesize = SG_ALL,
2999 .max_sectors = IBMVFC_MAX_SECTORS,
3000 .use_clustering = ENABLE_CLUSTERING,
3001 .shost_attrs = ibmvfc_attrs,
3005 * ibmvfc_next_async_crq - Returns the next entry in async queue
3006 * @vhost: ibmvfc host struct
3009 * Pointer to next entry in queue / NULL if empty
3011 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3013 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3014 struct ibmvfc_async_crq *crq;
3016 crq = &async_crq->msgs[async_crq->cur];
3017 if (crq->valid & 0x80) {
3018 if (++async_crq->cur == async_crq->size)
3028 * ibmvfc_next_crq - Returns the next entry in message queue
3029 * @vhost: ibmvfc host struct
3032 * Pointer to next entry in queue / NULL if empty
3034 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3036 struct ibmvfc_crq_queue *queue = &vhost->crq;
3037 struct ibmvfc_crq *crq;
3039 crq = &queue->msgs[queue->cur];
3040 if (crq->valid & 0x80) {
3041 if (++queue->cur == queue->size)
3051 * ibmvfc_interrupt - Interrupt handler
3052 * @irq: number of irq to handle, not used
3053 * @dev_instance: ibmvfc_host that received interrupt
3058 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3060 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3061 unsigned long flags;
3063 spin_lock_irqsave(vhost->host->host_lock, flags);
3064 vio_disable_interrupts(to_vio_dev(vhost->dev));
3065 tasklet_schedule(&vhost->tasklet);
3066 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3071 * ibmvfc_tasklet - Interrupt handler tasklet
3072 * @data: ibmvfc host struct
3077 static void ibmvfc_tasklet(void *data)
3079 struct ibmvfc_host *vhost = data;
3080 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3081 struct ibmvfc_crq *crq;
3082 struct ibmvfc_async_crq *async;
3083 unsigned long flags;
3086 spin_lock_irqsave(vhost->host->host_lock, flags);
3088 /* Pull all the valid messages off the async CRQ */
3089 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3090 ibmvfc_handle_async(async, vhost);
3095 /* Pull all the valid messages off the CRQ */
3096 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3097 ibmvfc_handle_crq(crq, vhost);
3102 vio_enable_interrupts(vdev);
3103 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3104 vio_disable_interrupts(vdev);
3105 ibmvfc_handle_async(async, vhost);
3108 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3109 vio_disable_interrupts(vdev);
3110 ibmvfc_handle_crq(crq, vhost);
3117 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3121 * ibmvfc_init_tgt - Set the next init job step for the target
3122 * @tgt: ibmvfc target struct
3123 * @job_step: job step to perform
3126 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3127 void (*job_step) (struct ibmvfc_target *))
3129 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3130 tgt->job_step = job_step;
3131 wake_up(&tgt->vhost->work_wait_q);
3135 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3136 * @tgt: ibmvfc target struct
3137 * @job_step: initialization job step
3139 * Returns: 1 if step will be retried / 0 if not
3142 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3143 void (*job_step) (struct ibmvfc_target *))
3145 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3146 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3147 wake_up(&tgt->vhost->work_wait_q);
3150 ibmvfc_init_tgt(tgt, job_step);
3154 /* Defined in FC-LS */
3155 static const struct {
3172 * ibmvfc_get_prli_rsp - Find PRLI response index
3173 * @flags: PRLI response flags
3176 static int ibmvfc_get_prli_rsp(u16 flags)
3179 int code = (flags & 0x0f00) >> 8;
3181 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3182 if (prli_rsp[i].code == code)
3189 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3190 * @evt: ibmvfc event struct
3193 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3195 struct ibmvfc_target *tgt = evt->tgt;
3196 struct ibmvfc_host *vhost = evt->vhost;
3197 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3198 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3199 u32 status = rsp->common.status;
3200 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3202 vhost->discovery_threads--;
3203 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3205 case IBMVFC_MAD_SUCCESS:
3206 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3207 parms->type, parms->flags, parms->service_parms);
3209 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3210 index = ibmvfc_get_prli_rsp(parms->flags);
3211 if (prli_rsp[index].logged_in) {
3212 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
3213 tgt->need_login = 0;
3215 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
3216 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3217 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
3218 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3221 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3222 } else if (prli_rsp[index].retry)
3223 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3225 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3227 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3229 case IBMVFC_MAD_DRIVER_FAILED:
3231 case IBMVFC_MAD_CRQ_ERROR:
3232 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3234 case IBMVFC_MAD_FAILED:
3236 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED)
3237 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3238 else if (tgt->logo_rcvd)
3239 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3240 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3241 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3243 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3245 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3246 ibmvfc_get_cmd_error(rsp->status, rsp->error),
3247 rsp->status, rsp->error, status);
3251 kref_put(&tgt->kref, ibmvfc_release_tgt);
3252 ibmvfc_free_event(evt);
3253 wake_up(&vhost->work_wait_q);
3257 * ibmvfc_tgt_send_prli - Send a process login
3258 * @tgt: ibmvfc target struct
3261 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3263 struct ibmvfc_process_login *prli;
3264 struct ibmvfc_host *vhost = tgt->vhost;
3265 struct ibmvfc_event *evt;
3267 if (vhost->discovery_threads >= disc_threads)
3270 kref_get(&tgt->kref);
3271 evt = ibmvfc_get_event(vhost);
3272 vhost->discovery_threads++;
3273 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3275 prli = &evt->iu.prli;
3276 memset(prli, 0, sizeof(*prli));
3277 prli->common.version = 1;
3278 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
3279 prli->common.length = sizeof(*prli);
3280 prli->scsi_id = tgt->scsi_id;
3282 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3283 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
3284 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
3286 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3287 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3288 vhost->discovery_threads--;
3289 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3290 kref_put(&tgt->kref, ibmvfc_release_tgt);
3292 tgt_dbg(tgt, "Sent process login\n");
3296 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3297 * @evt: ibmvfc event struct
3300 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3302 struct ibmvfc_target *tgt = evt->tgt;
3303 struct ibmvfc_host *vhost = evt->vhost;
3304 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3305 u32 status = rsp->common.status;
3306 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3308 vhost->discovery_threads--;
3309 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3311 case IBMVFC_MAD_SUCCESS:
3312 tgt_dbg(tgt, "Port Login succeeded\n");
3313 if (tgt->ids.port_name &&
3314 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3316 tgt_dbg(tgt, "Port re-init required\n");
3319 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3320 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3321 tgt->ids.port_id = tgt->scsi_id;
3322 memcpy(&tgt->service_parms, &rsp->service_parms,
3323 sizeof(tgt->service_parms));
3324 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3325 sizeof(tgt->service_parms_change));
3326 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3328 case IBMVFC_MAD_DRIVER_FAILED:
3330 case IBMVFC_MAD_CRQ_ERROR:
3331 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3333 case IBMVFC_MAD_FAILED:
3335 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3336 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3338 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3340 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3341 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3342 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3343 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
3347 kref_put(&tgt->kref, ibmvfc_release_tgt);
3348 ibmvfc_free_event(evt);
3349 wake_up(&vhost->work_wait_q);
3353 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3354 * @tgt: ibmvfc target struct
3357 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3359 struct ibmvfc_port_login *plogi;
3360 struct ibmvfc_host *vhost = tgt->vhost;
3361 struct ibmvfc_event *evt;
3363 if (vhost->discovery_threads >= disc_threads)
3366 kref_get(&tgt->kref);
3368 evt = ibmvfc_get_event(vhost);
3369 vhost->discovery_threads++;
3370 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3371 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3373 plogi = &evt->iu.plogi;
3374 memset(plogi, 0, sizeof(*plogi));
3375 plogi->common.version = 1;
3376 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3377 plogi->common.length = sizeof(*plogi);
3378 plogi->scsi_id = tgt->scsi_id;
3380 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3381 vhost->discovery_threads--;
3382 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3383 kref_put(&tgt->kref, ibmvfc_release_tgt);
3385 tgt_dbg(tgt, "Sent port login\n");
3389 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3390 * @evt: ibmvfc event struct
3393 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3395 struct ibmvfc_target *tgt = evt->tgt;
3396 struct ibmvfc_host *vhost = evt->vhost;
3397 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3398 u32 status = rsp->common.status;
3400 vhost->discovery_threads--;
3401 ibmvfc_free_event(evt);
3402 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3405 case IBMVFC_MAD_SUCCESS:
3406 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3408 case IBMVFC_MAD_DRIVER_FAILED:
3409 kref_put(&tgt->kref, ibmvfc_release_tgt);
3410 wake_up(&vhost->work_wait_q);
3412 case IBMVFC_MAD_FAILED:
3414 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3418 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3419 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3420 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3421 tgt->scsi_id != tgt->new_scsi_id)
3422 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3423 kref_put(&tgt->kref, ibmvfc_release_tgt);
3424 wake_up(&vhost->work_wait_q);
3428 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3429 * @tgt: ibmvfc target struct
3432 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3434 struct ibmvfc_implicit_logout *mad;
3435 struct ibmvfc_host *vhost = tgt->vhost;
3436 struct ibmvfc_event *evt;
3438 if (vhost->discovery_threads >= disc_threads)
3441 kref_get(&tgt->kref);
3442 evt = ibmvfc_get_event(vhost);
3443 vhost->discovery_threads++;
3444 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3446 mad = &evt->iu.implicit_logout;
3447 memset(mad, 0, sizeof(*mad));
3448 mad->common.version = 1;
3449 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3450 mad->common.length = sizeof(*mad);
3451 mad->old_scsi_id = tgt->scsi_id;
3453 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3454 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3455 vhost->discovery_threads--;
3456 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3457 kref_put(&tgt->kref, ibmvfc_release_tgt);
3459 tgt_dbg(tgt, "Sent Implicit Logout\n");
3463 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3464 * @mad: ibmvfc passthru mad struct
3465 * @tgt: ibmvfc target struct
3468 * 1 if PLOGI needed / 0 if PLOGI not needed
3470 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3471 struct ibmvfc_target *tgt)
3473 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3474 sizeof(tgt->ids.port_name)))
3476 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3477 sizeof(tgt->ids.node_name)))
3479 if (mad->fc_iu.response[6] != tgt->scsi_id)
3485 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3486 * @evt: ibmvfc event struct
3489 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3491 struct ibmvfc_target *tgt = evt->tgt;
3492 struct ibmvfc_host *vhost = evt->vhost;
3493 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3494 u32 status = mad->common.status;
3495 u8 fc_reason, fc_explain;
3497 vhost->discovery_threads--;
3498 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3499 del_timer(&tgt->timer);
3502 case IBMVFC_MAD_SUCCESS:
3503 tgt_dbg(tgt, "ADISC succeeded\n");
3504 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3505 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3507 case IBMVFC_MAD_DRIVER_FAILED:
3509 case IBMVFC_MAD_FAILED:
3511 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3512 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3513 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3514 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3515 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3516 mad->iu.status, mad->iu.error,
3517 ibmvfc_get_fc_type(fc_reason), fc_reason,
3518 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3522 kref_put(&tgt->kref, ibmvfc_release_tgt);
3523 ibmvfc_free_event(evt);
3524 wake_up(&vhost->work_wait_q);
3528 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3529 * @evt: ibmvfc event struct
3532 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3534 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3536 memset(mad, 0, sizeof(*mad));
3537 mad->common.version = 1;
3538 mad->common.opcode = IBMVFC_PASSTHRU;
3539 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3540 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3541 offsetof(struct ibmvfc_passthru_mad, iu);
3542 mad->cmd_ioba.len = sizeof(mad->iu);
3543 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3544 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3545 mad->iu.cmd.va = (u64)evt->crq.ioba +
3546 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3547 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3548 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3549 mad->iu.rsp.va = (u64)evt->crq.ioba +
3550 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3551 offsetof(struct ibmvfc_passthru_fc_iu, response);
3552 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3556 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3557 * @evt: ibmvfc event struct
3559 * Just cleanup this event struct. Everything else is handled by
3560 * the ADISC completion handler. If the ADISC never actually comes
3561 * back, we still have the timer running on the ADISC event struct
3562 * which will fire and cause the CRQ to get reset.
3565 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3567 struct ibmvfc_host *vhost = evt->vhost;
3568 struct ibmvfc_target *tgt = evt->tgt;
3570 tgt_dbg(tgt, "ADISC cancel complete\n");
3571 vhost->abort_threads--;
3572 ibmvfc_free_event(evt);
3573 kref_put(&tgt->kref, ibmvfc_release_tgt);
3574 wake_up(&vhost->work_wait_q);
3578 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3579 * @tgt: ibmvfc target struct
3581 * If an ADISC times out, send a cancel. If the cancel times
3582 * out, reset the CRQ. When the ADISC comes back as cancelled,
3583 * log back into the target.
3585 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3587 struct ibmvfc_host *vhost = tgt->vhost;
3588 struct ibmvfc_event *evt;
3589 struct ibmvfc_tmf *tmf;
3590 unsigned long flags;
3593 tgt_dbg(tgt, "ADISC timeout\n");
3594 spin_lock_irqsave(vhost->host->host_lock, flags);
3595 if (vhost->abort_threads >= disc_threads ||
3596 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3597 vhost->state != IBMVFC_INITIALIZING ||
3598 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3599 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3603 vhost->abort_threads++;
3604 kref_get(&tgt->kref);
3605 evt = ibmvfc_get_event(vhost);
3606 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3610 memset(tmf, 0, sizeof(*tmf));
3611 tmf->common.version = 1;
3612 tmf->common.opcode = IBMVFC_TMF_MAD;
3613 tmf->common.length = sizeof(*tmf);
3614 tmf->scsi_id = tgt->scsi_id;
3615 tmf->cancel_key = tgt->cancel_key;
3617 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3620 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3621 vhost->abort_threads--;
3622 kref_put(&tgt->kref, ibmvfc_release_tgt);
3623 __ibmvfc_reset_host(vhost);
3625 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3626 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3630 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3631 * @tgt: ibmvfc target struct
3633 * When sending an ADISC we end up with two timers running. The
3634 * first timer is the timer in the ibmvfc target struct. If this
3635 * fires, we send a cancel to the target. The second timer is the
3636 * timer on the ibmvfc event for the ADISC, which is longer. If that
3637 * fires, it means the ADISC timed out and our attempt to cancel it
3638 * also failed, so we need to reset the CRQ.
3640 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3642 struct ibmvfc_passthru_mad *mad;
3643 struct ibmvfc_host *vhost = tgt->vhost;
3644 struct ibmvfc_event *evt;
3646 if (vhost->discovery_threads >= disc_threads)
3649 kref_get(&tgt->kref);
3650 evt = ibmvfc_get_event(vhost);
3651 vhost->discovery_threads++;
3652 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3655 ibmvfc_init_passthru(evt);
3656 mad = &evt->iu.passthru;
3657 mad->iu.flags = IBMVFC_FC_ELS;
3658 mad->iu.scsi_id = tgt->scsi_id;
3659 mad->iu.cancel_key = tgt->cancel_key;
3661 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3662 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3663 sizeof(vhost->login_buf->resp.port_name));
3664 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3665 sizeof(vhost->login_buf->resp.node_name));
3666 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3668 if (timer_pending(&tgt->timer))
3669 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3671 tgt->timer.data = (unsigned long) tgt;
3672 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3673 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3674 add_timer(&tgt->timer);
3677 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3678 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3679 vhost->discovery_threads--;
3680 del_timer(&tgt->timer);
3681 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3682 kref_put(&tgt->kref, ibmvfc_release_tgt);
3684 tgt_dbg(tgt, "Sent ADISC\n");
3688 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3689 * @evt: ibmvfc event struct
3692 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3694 struct ibmvfc_target *tgt = evt->tgt;
3695 struct ibmvfc_host *vhost = evt->vhost;
3696 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3697 u32 status = rsp->common.status;
3698 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3700 vhost->discovery_threads--;
3701 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3703 case IBMVFC_MAD_SUCCESS:
3704 tgt_dbg(tgt, "Query Target succeeded\n");
3705 tgt->new_scsi_id = rsp->scsi_id;
3706 if (rsp->scsi_id != tgt->scsi_id)
3707 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3709 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3711 case IBMVFC_MAD_DRIVER_FAILED:
3713 case IBMVFC_MAD_CRQ_ERROR:
3714 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3716 case IBMVFC_MAD_FAILED:
3718 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3719 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3720 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3721 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3722 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3723 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3725 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3727 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3728 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3729 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3730 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3734 kref_put(&tgt->kref, ibmvfc_release_tgt);
3735 ibmvfc_free_event(evt);
3736 wake_up(&vhost->work_wait_q);
3740 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3741 * @tgt: ibmvfc target struct
3744 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3746 struct ibmvfc_query_tgt *query_tgt;
3747 struct ibmvfc_host *vhost = tgt->vhost;
3748 struct ibmvfc_event *evt;
3750 if (vhost->discovery_threads >= disc_threads)
3753 kref_get(&tgt->kref);
3754 evt = ibmvfc_get_event(vhost);
3755 vhost->discovery_threads++;
3757 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3758 query_tgt = &evt->iu.query_tgt;
3759 memset(query_tgt, 0, sizeof(*query_tgt));
3760 query_tgt->common.version = 1;
3761 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3762 query_tgt->common.length = sizeof(*query_tgt);
3763 query_tgt->wwpn = tgt->ids.port_name;
3765 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3766 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3767 vhost->discovery_threads--;
3768 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3769 kref_put(&tgt->kref, ibmvfc_release_tgt);
3771 tgt_dbg(tgt, "Sent Query Target\n");
3775 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3776 * @vhost: ibmvfc host struct
3777 * @scsi_id: SCSI ID to allocate target for
3780 * 0 on success / other on failure
3782 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3784 struct ibmvfc_target *tgt;
3785 unsigned long flags;
3787 spin_lock_irqsave(vhost->host->host_lock, flags);
3788 list_for_each_entry(tgt, &vhost->targets, queue) {
3789 if (tgt->scsi_id == scsi_id) {
3790 if (tgt->need_login)
3791 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3795 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3797 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3799 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
3804 memset(tgt, 0, sizeof(*tgt));
3805 tgt->scsi_id = scsi_id;
3806 tgt->new_scsi_id = scsi_id;
3808 tgt->need_login = 1;
3809 tgt->cancel_key = vhost->task_set++;
3810 init_timer(&tgt->timer);
3811 kref_init(&tgt->kref);
3812 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3813 spin_lock_irqsave(vhost->host->host_lock, flags);
3814 list_add_tail(&tgt->queue, &vhost->targets);
3817 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3822 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3823 * @vhost: ibmvfc host struct
3826 * 0 on success / other on failure
3828 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3832 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3833 rc = ibmvfc_alloc_target(vhost,
3834 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3840 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3841 * @evt: ibmvfc event struct
3844 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3846 struct ibmvfc_host *vhost = evt->vhost;
3847 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3848 u32 mad_status = rsp->common.status;
3849 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3851 switch (mad_status) {
3852 case IBMVFC_MAD_SUCCESS:
3853 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3854 vhost->num_targets = rsp->num_written;
3855 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3857 case IBMVFC_MAD_FAILED:
3858 level += ibmvfc_retry_host_init(vhost);
3859 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3860 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3862 case IBMVFC_MAD_DRIVER_FAILED:
3865 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3866 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3870 ibmvfc_free_event(evt);
3871 wake_up(&vhost->work_wait_q);
3875 * ibmvfc_discover_targets - Send Discover Targets MAD
3876 * @vhost: ibmvfc host struct
3879 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3881 struct ibmvfc_discover_targets *mad;
3882 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3884 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3885 mad = &evt->iu.discover_targets;
3886 memset(mad, 0, sizeof(*mad));
3887 mad->common.version = 1;
3888 mad->common.opcode = IBMVFC_DISC_TARGETS;
3889 mad->common.length = sizeof(*mad);
3890 mad->bufflen = vhost->disc_buf_sz;
3891 mad->buffer.va = vhost->disc_buf_dma;
3892 mad->buffer.len = vhost->disc_buf_sz;
3893 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3895 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3896 ibmvfc_dbg(vhost, "Sent discover targets\n");
3898 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3902 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3903 * @evt: ibmvfc event struct
3906 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3908 struct ibmvfc_host *vhost = evt->vhost;
3909 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3910 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3911 unsigned int npiv_max_sectors;
3912 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3914 switch (mad_status) {
3915 case IBMVFC_MAD_SUCCESS:
3916 ibmvfc_free_event(evt);
3918 case IBMVFC_MAD_FAILED:
3919 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3920 level += ibmvfc_retry_host_init(vhost);
3922 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3923 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
3924 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3925 ibmvfc_free_event(evt);
3927 case IBMVFC_MAD_CRQ_ERROR:
3928 ibmvfc_retry_host_init(vhost);
3929 case IBMVFC_MAD_DRIVER_FAILED:
3930 ibmvfc_free_event(evt);
3933 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3934 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3935 ibmvfc_free_event(evt);
3939 vhost->client_migrated = 0;
3941 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3942 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3944 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3945 wake_up(&vhost->work_wait_q);
3949 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3950 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3952 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3953 wake_up(&vhost->work_wait_q);
3957 vhost->logged_in = 1;
3958 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3959 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3960 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3961 rsp->drc_name, npiv_max_sectors);
3963 fc_host_fabric_name(vhost->host) = rsp->node_name;
3964 fc_host_node_name(vhost->host) = rsp->node_name;
3965 fc_host_port_name(vhost->host) = rsp->port_name;
3966 fc_host_port_id(vhost->host) = rsp->scsi_id;
3967 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3968 fc_host_supported_classes(vhost->host) = 0;
3969 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3970 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3971 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3972 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3973 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3974 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3975 fc_host_maxframe_size(vhost->host) =
3976 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3978 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3979 vhost->host->max_sectors = npiv_max_sectors;
3980 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3981 wake_up(&vhost->work_wait_q);
3985 * ibmvfc_npiv_login - Sends NPIV login
3986 * @vhost: ibmvfc host struct
3989 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3991 struct ibmvfc_npiv_login_mad *mad;
3992 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3994 ibmvfc_gather_partition_info(vhost);
3995 ibmvfc_set_login_info(vhost);
3996 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3998 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3999 mad = &evt->iu.npiv_login;
4000 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
4001 mad->common.version = 1;
4002 mad->common.opcode = IBMVFC_NPIV_LOGIN;
4003 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
4004 mad->buffer.va = vhost->login_buf_dma;
4005 mad->buffer.len = sizeof(*vhost->login_buf);
4007 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4009 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4010 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4012 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4016 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4017 * @vhost: ibmvfc host struct
4020 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4022 struct ibmvfc_host *vhost = evt->vhost;
4023 u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
4025 ibmvfc_free_event(evt);
4027 switch (mad_status) {
4028 case IBMVFC_MAD_SUCCESS:
4029 if (list_empty(&vhost->sent) &&
4030 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
4031 ibmvfc_init_host(vhost);
4035 case IBMVFC_MAD_FAILED:
4036 case IBMVFC_MAD_NOT_SUPPORTED:
4037 case IBMVFC_MAD_CRQ_ERROR:
4038 case IBMVFC_MAD_DRIVER_FAILED:
4040 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4044 ibmvfc_hard_reset_host(vhost);
4048 * ibmvfc_npiv_logout - Issue an NPIV Logout
4049 * @vhost: ibmvfc host struct
4052 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4054 struct ibmvfc_npiv_logout_mad *mad;
4055 struct ibmvfc_event *evt;
4057 evt = ibmvfc_get_event(vhost);
4058 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4060 mad = &evt->iu.npiv_logout;
4061 memset(mad, 0, sizeof(*mad));
4062 mad->common.version = 1;
4063 mad->common.opcode = IBMVFC_NPIV_LOGOUT;
4064 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
4066 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4068 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4069 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4071 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4075 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4076 * @vhost: ibmvfc host struct
4079 * 1 if work to do / 0 if not
4081 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4083 struct ibmvfc_target *tgt;
4085 list_for_each_entry(tgt, &vhost->targets, queue) {
4086 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4087 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4095 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4096 * @vhost: ibmvfc host struct
4099 * 1 if work to do / 0 if not
4101 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4103 struct ibmvfc_target *tgt;
4105 if (kthread_should_stop())
4107 switch (vhost->action) {
4108 case IBMVFC_HOST_ACTION_NONE:
4109 case IBMVFC_HOST_ACTION_INIT_WAIT:
4110 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4112 case IBMVFC_HOST_ACTION_TGT_INIT:
4113 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4114 if (vhost->discovery_threads == disc_threads)
4116 list_for_each_entry(tgt, &vhost->targets, queue)
4117 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4119 list_for_each_entry(tgt, &vhost->targets, queue)
4120 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4123 case IBMVFC_HOST_ACTION_LOGO:
4124 case IBMVFC_HOST_ACTION_INIT:
4125 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4126 case IBMVFC_HOST_ACTION_TGT_DEL:
4127 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4128 case IBMVFC_HOST_ACTION_QUERY:
4129 case IBMVFC_HOST_ACTION_RESET:
4130 case IBMVFC_HOST_ACTION_REENABLE:
4139 * ibmvfc_work_to_do - Is there task level work to do?
4140 * @vhost: ibmvfc host struct
4143 * 1 if work to do / 0 if not
4145 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4147 unsigned long flags;
4150 spin_lock_irqsave(vhost->host->host_lock, flags);
4151 rc = __ibmvfc_work_to_do(vhost);
4152 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4157 * ibmvfc_log_ae - Log async events if necessary
4158 * @vhost: ibmvfc host struct
4159 * @events: events to log
4162 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4164 if (events & IBMVFC_AE_RSCN)
4165 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4166 if ((events & IBMVFC_AE_LINKDOWN) &&
4167 vhost->state >= IBMVFC_HALTED)
4168 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4169 if ((events & IBMVFC_AE_LINKUP) &&
4170 vhost->state == IBMVFC_INITIALIZING)
4171 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4175 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4176 * @tgt: ibmvfc target struct
4179 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4181 struct ibmvfc_host *vhost = tgt->vhost;
4182 struct fc_rport *rport;
4183 unsigned long flags;
4185 tgt_dbg(tgt, "Adding rport\n");
4186 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4187 spin_lock_irqsave(vhost->host->host_lock, flags);
4189 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4190 tgt_dbg(tgt, "Deleting rport\n");
4191 list_del(&tgt->queue);
4192 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4193 fc_remote_port_delete(rport);
4194 del_timer_sync(&tgt->timer);
4195 kref_put(&tgt->kref, ibmvfc_release_tgt);
4200 tgt_dbg(tgt, "rport add succeeded\n");
4202 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
4203 rport->supported_classes = 0;
4204 tgt->target_id = rport->scsi_target_id;
4205 if (tgt->service_parms.class1_parms[0] & 0x80000000)
4206 rport->supported_classes |= FC_COS_CLASS1;
4207 if (tgt->service_parms.class2_parms[0] & 0x80000000)
4208 rport->supported_classes |= FC_COS_CLASS2;
4209 if (tgt->service_parms.class3_parms[0] & 0x80000000)
4210 rport->supported_classes |= FC_COS_CLASS3;
4212 blk_queue_max_segments(rport->rqst_q, 1);
4214 tgt_dbg(tgt, "rport add failed\n");
4215 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4219 * ibmvfc_do_work - Do task level work
4220 * @vhost: ibmvfc host struct
4223 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4225 struct ibmvfc_target *tgt;
4226 unsigned long flags;
4227 struct fc_rport *rport;
4230 ibmvfc_log_ae(vhost, vhost->events_to_log);
4231 spin_lock_irqsave(vhost->host->host_lock, flags);
4232 vhost->events_to_log = 0;
4233 switch (vhost->action) {
4234 case IBMVFC_HOST_ACTION_NONE:
4235 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4236 case IBMVFC_HOST_ACTION_INIT_WAIT:
4238 case IBMVFC_HOST_ACTION_RESET:
4239 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4240 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4241 rc = ibmvfc_reset_crq(vhost);
4242 spin_lock_irqsave(vhost->host->host_lock, flags);
4243 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4244 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
4245 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4246 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4249 case IBMVFC_HOST_ACTION_REENABLE:
4250 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4251 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4252 rc = ibmvfc_reenable_crq_queue(vhost);
4253 spin_lock_irqsave(vhost->host->host_lock, flags);
4254 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4255 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4256 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4259 case IBMVFC_HOST_ACTION_LOGO:
4260 vhost->job_step(vhost);
4262 case IBMVFC_HOST_ACTION_INIT:
4263 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
4264 if (vhost->delay_init) {
4265 vhost->delay_init = 0;
4266 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4270 vhost->job_step(vhost);
4272 case IBMVFC_HOST_ACTION_QUERY:
4273 list_for_each_entry(tgt, &vhost->targets, queue)
4274 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4275 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4277 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4278 list_for_each_entry(tgt, &vhost->targets, queue) {
4279 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4285 if (!ibmvfc_dev_init_to_do(vhost))
4286 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4288 case IBMVFC_HOST_ACTION_TGT_DEL:
4289 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4290 list_for_each_entry(tgt, &vhost->targets, queue) {
4291 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4292 tgt_dbg(tgt, "Deleting rport\n");
4295 list_del(&tgt->queue);
4296 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4298 fc_remote_port_delete(rport);
4299 del_timer_sync(&tgt->timer);
4300 kref_put(&tgt->kref, ibmvfc_release_tgt);
4305 if (vhost->state == IBMVFC_INITIALIZING) {
4306 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
4307 if (vhost->reinit) {
4309 scsi_block_requests(vhost->host);
4310 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4311 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4313 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4314 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4315 wake_up(&vhost->init_wait_q);
4316 schedule_work(&vhost->rport_add_work_q);
4317 vhost->init_retries = 0;
4318 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4319 scsi_unblock_requests(vhost->host);
4324 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4325 vhost->job_step = ibmvfc_discover_targets;
4328 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4329 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4330 scsi_unblock_requests(vhost->host);
4331 wake_up(&vhost->init_wait_q);
4335 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4336 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4337 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4338 ibmvfc_alloc_targets(vhost);
4339 spin_lock_irqsave(vhost->host->host_lock, flags);
4341 case IBMVFC_HOST_ACTION_TGT_INIT:
4342 list_for_each_entry(tgt, &vhost->targets, queue) {
4343 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4349 if (!ibmvfc_dev_init_to_do(vhost))
4350 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4356 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4360 * ibmvfc_work - Do task level work
4361 * @data: ibmvfc host struct
4366 static int ibmvfc_work(void *data)
4368 struct ibmvfc_host *vhost = data;
4371 set_user_nice(current, -20);
4374 rc = wait_event_interruptible(vhost->work_wait_q,
4375 ibmvfc_work_to_do(vhost));
4379 if (kthread_should_stop())
4382 ibmvfc_do_work(vhost);
4385 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4390 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4391 * @vhost: ibmvfc host struct
4393 * Allocates a page for messages, maps it for dma, and registers
4394 * the crq with the hypervisor.
4397 * zero on success / other on failure
4399 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4401 int rc, retrc = -ENOMEM;
4402 struct device *dev = vhost->dev;
4403 struct vio_dev *vdev = to_vio_dev(dev);
4404 struct ibmvfc_crq_queue *crq = &vhost->crq;
4407 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4412 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4413 crq->msg_token = dma_map_single(dev, crq->msgs,
4414 PAGE_SIZE, DMA_BIDIRECTIONAL);
4416 if (dma_mapping_error(dev, crq->msg_token))
4419 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4420 crq->msg_token, PAGE_SIZE);
4422 if (rc == H_RESOURCE)
4423 /* maybe kexecing and resource is busy. try a reset */
4424 retrc = rc = ibmvfc_reset_crq(vhost);
4427 dev_warn(dev, "Partner adapter not ready\n");
4429 dev_warn(dev, "Error %d opening adapter\n", rc);
4430 goto reg_crq_failed;
4435 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4437 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4438 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4439 goto req_irq_failed;
4442 if ((rc = vio_enable_interrupts(vdev))) {
4443 dev_err(dev, "Error %d enabling interrupts\n", rc);
4444 goto req_irq_failed;
4452 tasklet_kill(&vhost->tasklet);
4454 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4455 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4457 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4459 free_page((unsigned long)crq->msgs);
4464 * ibmvfc_free_mem - Free memory for vhost
4465 * @vhost: ibmvfc host struct
4470 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4472 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4475 mempool_destroy(vhost->tgt_pool);
4476 kfree(vhost->trace);
4477 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4478 vhost->disc_buf_dma);
4479 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4480 vhost->login_buf, vhost->login_buf_dma);
4481 dma_pool_destroy(vhost->sg_pool);
4482 dma_unmap_single(vhost->dev, async_q->msg_token,
4483 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4484 free_page((unsigned long)async_q->msgs);
4489 * ibmvfc_alloc_mem - Allocate memory for vhost
4490 * @vhost: ibmvfc host struct
4493 * 0 on success / non-zero on failure
4495 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4497 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4498 struct device *dev = vhost->dev;
4501 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4502 if (!async_q->msgs) {
4503 dev_err(dev, "Couldn't allocate async queue.\n");
4507 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4508 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4509 async_q->size * sizeof(*async_q->msgs),
4512 if (dma_mapping_error(dev, async_q->msg_token)) {
4513 dev_err(dev, "Failed to map async queue\n");
4514 goto free_async_crq;
4517 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4518 SG_ALL * sizeof(struct srp_direct_buf),
4519 sizeof(struct srp_direct_buf), 0);
4521 if (!vhost->sg_pool) {
4522 dev_err(dev, "Failed to allocate sg pool\n");
4523 goto unmap_async_crq;
4526 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4527 &vhost->login_buf_dma, GFP_KERNEL);
4529 if (!vhost->login_buf) {
4530 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4534 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4535 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4536 &vhost->disc_buf_dma, GFP_KERNEL);
4538 if (!vhost->disc_buf) {
4539 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4540 goto free_login_buffer;
4543 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4544 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4547 goto free_disc_buffer;
4549 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4550 sizeof(struct ibmvfc_target));
4552 if (!vhost->tgt_pool) {
4553 dev_err(dev, "Couldn't allocate target memory pool\n");
4561 kfree(vhost->trace);
4563 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4564 vhost->disc_buf_dma);
4566 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4567 vhost->login_buf, vhost->login_buf_dma);
4569 dma_pool_destroy(vhost->sg_pool);
4571 dma_unmap_single(dev, async_q->msg_token,
4572 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4574 free_page((unsigned long)async_q->msgs);
4581 * ibmvfc_rport_add_thread - Worker thread for rport adds
4582 * @work: work struct
4585 static void ibmvfc_rport_add_thread(struct work_struct *work)
4587 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4589 struct ibmvfc_target *tgt;
4590 struct fc_rport *rport;
4591 unsigned long flags;
4595 spin_lock_irqsave(vhost->host->host_lock, flags);
4598 if (vhost->state != IBMVFC_ACTIVE)
4601 list_for_each_entry(tgt, &vhost->targets, queue) {
4602 if (tgt->add_rport) {
4605 kref_get(&tgt->kref);
4608 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4609 ibmvfc_tgt_add_rport(tgt);
4610 } else if (get_device(&rport->dev)) {
4611 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4612 tgt_dbg(tgt, "Setting rport roles\n");
4613 fc_remote_port_rolechg(rport, tgt->ids.roles);
4614 put_device(&rport->dev);
4617 kref_put(&tgt->kref, ibmvfc_release_tgt);
4618 spin_lock_irqsave(vhost->host->host_lock, flags);
4624 if (vhost->state == IBMVFC_ACTIVE)
4625 vhost->scan_complete = 1;
4626 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4631 * ibmvfc_probe - Adapter hot plug add entry point
4632 * @vdev: vio device struct
4633 * @id: vio device id struct
4636 * 0 on success / non-zero on failure
4638 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4640 struct ibmvfc_host *vhost;
4641 struct Scsi_Host *shost;
4642 struct device *dev = &vdev->dev;
4646 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4648 dev_err(dev, "Couldn't allocate host data\n");
4652 shost->transportt = ibmvfc_transport_template;
4653 shost->can_queue = max_requests;
4654 shost->max_lun = max_lun;
4655 shost->max_id = max_targets;
4656 shost->max_sectors = IBMVFC_MAX_SECTORS;
4657 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4658 shost->unique_id = shost->host_no;
4660 vhost = shost_priv(shost);
4661 INIT_LIST_HEAD(&vhost->sent);
4662 INIT_LIST_HEAD(&vhost->free);
4663 INIT_LIST_HEAD(&vhost->targets);
4664 sprintf(vhost->name, IBMVFC_NAME);
4665 vhost->host = shost;
4667 vhost->partition_number = -1;
4668 vhost->log_level = log_level;
4669 vhost->task_set = 1;
4670 strcpy(vhost->partition_name, "UNKNOWN");
4671 init_waitqueue_head(&vhost->work_wait_q);
4672 init_waitqueue_head(&vhost->init_wait_q);
4673 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4674 mutex_init(&vhost->passthru_mutex);
4676 if ((rc = ibmvfc_alloc_mem(vhost)))
4677 goto free_scsi_host;
4679 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4682 if (IS_ERR(vhost->work_thread)) {
4683 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4684 PTR_ERR(vhost->work_thread));
4688 if ((rc = ibmvfc_init_crq(vhost))) {
4689 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4693 if ((rc = ibmvfc_init_event_pool(vhost))) {
4694 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4698 if ((rc = scsi_add_host(shost, dev)))
4699 goto release_event_pool;
4701 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4702 &ibmvfc_trace_attr))) {
4703 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4707 if (shost_to_fc_host(shost)->rqst_q)
4708 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
4709 dev_set_drvdata(dev, vhost);
4710 spin_lock(&ibmvfc_driver_lock);
4711 list_add_tail(&vhost->queue, &ibmvfc_head);
4712 spin_unlock(&ibmvfc_driver_lock);
4714 ibmvfc_send_crq_init(vhost);
4715 scsi_scan_host(shost);
4719 scsi_remove_host(shost);
4721 ibmvfc_free_event_pool(vhost);
4723 ibmvfc_release_crq_queue(vhost);
4725 kthread_stop(vhost->work_thread);
4727 ibmvfc_free_mem(vhost);
4729 scsi_host_put(shost);
4736 * ibmvfc_remove - Adapter hot plug remove entry point
4737 * @vdev: vio device struct
4742 static int ibmvfc_remove(struct vio_dev *vdev)
4744 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4745 unsigned long flags;
4748 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4750 spin_lock_irqsave(vhost->host->host_lock, flags);
4751 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4752 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4754 ibmvfc_wait_while_resetting(vhost);
4755 ibmvfc_release_crq_queue(vhost);
4756 kthread_stop(vhost->work_thread);
4757 fc_remove_host(vhost->host);
4758 scsi_remove_host(vhost->host);
4760 spin_lock_irqsave(vhost->host->host_lock, flags);
4761 ibmvfc_purge_requests(vhost, DID_ERROR);
4762 ibmvfc_free_event_pool(vhost);
4763 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4765 ibmvfc_free_mem(vhost);
4766 spin_lock(&ibmvfc_driver_lock);
4767 list_del(&vhost->queue);
4768 spin_unlock(&ibmvfc_driver_lock);
4769 scsi_host_put(vhost->host);
4775 * ibmvfc_resume - Resume from suspend
4776 * @dev: device struct
4778 * We may have lost an interrupt across suspend/resume, so kick the
4782 static int ibmvfc_resume(struct device *dev)
4784 unsigned long flags;
4785 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4786 struct vio_dev *vdev = to_vio_dev(dev);
4788 spin_lock_irqsave(vhost->host->host_lock, flags);
4789 vio_disable_interrupts(vdev);
4790 tasklet_schedule(&vhost->tasklet);
4791 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4796 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4797 * @vdev: vio device struct
4800 * Number of bytes the driver will need to DMA map at the same time in
4801 * order to perform well.
4803 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4805 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4806 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4809 static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4810 {"fcp", "IBM,vfc-client"},
4813 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4815 static struct dev_pm_ops ibmvfc_pm_ops = {
4816 .resume = ibmvfc_resume
4819 static struct vio_driver ibmvfc_driver = {
4820 .id_table = ibmvfc_device_table,
4821 .probe = ibmvfc_probe,
4822 .remove = ibmvfc_remove,
4823 .get_desired_dma = ibmvfc_get_desired_dma,
4825 .name = IBMVFC_NAME,
4826 .owner = THIS_MODULE,
4827 .pm = &ibmvfc_pm_ops,
4831 static struct fc_function_template ibmvfc_transport_functions = {
4832 .show_host_fabric_name = 1,
4833 .show_host_node_name = 1,
4834 .show_host_port_name = 1,
4835 .show_host_supported_classes = 1,
4836 .show_host_port_type = 1,
4837 .show_host_port_id = 1,
4838 .show_host_maxframe_size = 1,
4840 .get_host_port_state = ibmvfc_get_host_port_state,
4841 .show_host_port_state = 1,
4843 .get_host_speed = ibmvfc_get_host_speed,
4844 .show_host_speed = 1,
4846 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4847 .terminate_rport_io = ibmvfc_terminate_rport_io,
4849 .show_rport_maxframe_size = 1,
4850 .show_rport_supported_classes = 1,
4852 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4853 .show_rport_dev_loss_tmo = 1,
4855 .get_starget_node_name = ibmvfc_get_starget_node_name,
4856 .show_starget_node_name = 1,
4858 .get_starget_port_name = ibmvfc_get_starget_port_name,
4859 .show_starget_port_name = 1,
4861 .get_starget_port_id = ibmvfc_get_starget_port_id,
4862 .show_starget_port_id = 1,
4864 .bsg_request = ibmvfc_bsg_request,
4865 .bsg_timeout = ibmvfc_bsg_timeout,
4869 * ibmvfc_module_init - Initialize the ibmvfc module
4872 * 0 on success / other on failure
4874 static int __init ibmvfc_module_init(void)
4878 if (!firmware_has_feature(FW_FEATURE_VIO))
4881 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4882 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4884 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4885 if (!ibmvfc_transport_template)
4888 rc = vio_register_driver(&ibmvfc_driver);
4890 fc_release_transport(ibmvfc_transport_template);
4895 * ibmvfc_module_exit - Teardown the ibmvfc module
4900 static void __exit ibmvfc_module_exit(void)
4902 vio_unregister_driver(&ibmvfc_driver);
4903 fc_release_transport(ibmvfc_transport_template);
4906 module_init(ibmvfc_module_init);
4907 module_exit(ibmvfc_module_exit);