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 u64 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 ibmvfc_debug = IBMVFC_DEBUG;
54 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
55 static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
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, ullong, 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(log_level, log_level, uint, 0);
88 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
89 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
90 module_param_named(cls3_error, cls3_error, uint, 0);
91 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
92 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
118 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
125 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
126 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
130 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
133 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
134 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
135 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
136 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
138 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
140 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
143 static void ibmvfc_npiv_login(struct ibmvfc_host *);
144 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
145 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
146 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
147 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
149 static const char *unknown_error = "unknown error";
151 #ifdef CONFIG_SCSI_IBMVFC_TRACE
153 * ibmvfc_trc_start - Log a start trace entry
154 * @evt: ibmvfc event struct
157 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
159 struct ibmvfc_host *vhost = evt->vhost;
160 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
161 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
162 struct ibmvfc_trace_entry *entry;
164 entry = &vhost->trace[vhost->trace_index++];
166 entry->time = jiffies;
167 entry->fmt = evt->crq.format;
168 entry->type = IBMVFC_TRC_START;
170 switch (entry->fmt) {
171 case IBMVFC_CMD_FORMAT:
172 entry->op_code = vfc_cmd->iu.cdb[0];
173 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
174 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
175 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
176 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
178 case IBMVFC_MAD_FORMAT:
179 entry->op_code = be32_to_cpu(mad->opcode);
187 * ibmvfc_trc_end - Log an end trace entry
188 * @evt: ibmvfc event struct
191 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
193 struct ibmvfc_host *vhost = evt->vhost;
194 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
195 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
196 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
199 entry->time = jiffies;
200 entry->fmt = evt->crq.format;
201 entry->type = IBMVFC_TRC_END;
203 switch (entry->fmt) {
204 case IBMVFC_CMD_FORMAT:
205 entry->op_code = vfc_cmd->iu.cdb[0];
206 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
207 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
208 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
209 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
210 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
211 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
212 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
213 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
215 case IBMVFC_MAD_FORMAT:
216 entry->op_code = be32_to_cpu(mad->opcode);
217 entry->u.end.status = be16_to_cpu(mad->status);
226 #define ibmvfc_trc_start(evt) do { } while (0)
227 #define ibmvfc_trc_end(evt) do { } while (0)
231 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
232 * @status: status / error class
236 * index into cmd_status / -EINVAL on failure
238 static int ibmvfc_get_err_index(u16 status, u16 error)
242 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
243 if ((cmd_status[i].status & status) == cmd_status[i].status &&
244 cmd_status[i].error == error)
251 * ibmvfc_get_cmd_error - Find the error description for the fcp response
252 * @status: status / error class
256 * error description string
258 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
260 int rc = ibmvfc_get_err_index(status, error);
262 return cmd_status[rc].name;
263 return unknown_error;
267 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
268 * @vfc_cmd: ibmvfc command struct
271 * SCSI result value to return for completed command
273 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
276 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
277 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
279 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
280 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
281 rsp->data.info.rsp_code))
282 return DID_ERROR << 16;
284 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
286 return rsp->scsi_status | (cmd_status[err].result << 16);
287 return rsp->scsi_status | (DID_ERROR << 16);
291 * ibmvfc_retry_cmd - Determine if error status is retryable
292 * @status: status / error class
296 * 1 if error should be retried / 0 if it should not
298 static int ibmvfc_retry_cmd(u16 status, u16 error)
300 int rc = ibmvfc_get_err_index(status, error);
303 return cmd_status[rc].retry;
307 static const char *unknown_fc_explain = "unknown fc explain";
309 static const struct {
313 { 0x00, "no additional explanation" },
314 { 0x01, "service parameter error - options" },
315 { 0x03, "service parameter error - initiator control" },
316 { 0x05, "service parameter error - recipient control" },
317 { 0x07, "service parameter error - received data field size" },
318 { 0x09, "service parameter error - concurrent seq" },
319 { 0x0B, "service parameter error - credit" },
320 { 0x0D, "invalid N_Port/F_Port_Name" },
321 { 0x0E, "invalid node/Fabric Name" },
322 { 0x0F, "invalid common service parameters" },
323 { 0x11, "invalid association header" },
324 { 0x13, "association header required" },
325 { 0x15, "invalid originator S_ID" },
326 { 0x17, "invalid OX_ID-RX-ID combination" },
327 { 0x19, "command (request) already in progress" },
328 { 0x1E, "N_Port Login requested" },
329 { 0x1F, "Invalid N_Port_ID" },
332 static const struct {
336 { 0x00, "no additional explanation" },
337 { 0x01, "port identifier not registered" },
338 { 0x02, "port name not registered" },
339 { 0x03, "node name not registered" },
340 { 0x04, "class of service not registered" },
341 { 0x06, "initial process associator not registered" },
342 { 0x07, "FC-4 TYPEs not registered" },
343 { 0x08, "symbolic port name not registered" },
344 { 0x09, "symbolic node name not registered" },
345 { 0x0A, "port type not registered" },
346 { 0xF0, "authorization exception" },
347 { 0xF1, "authentication exception" },
348 { 0xF2, "data base full" },
349 { 0xF3, "data base empty" },
350 { 0xF4, "processing request" },
351 { 0xF5, "unable to verify connection" },
352 { 0xF6, "devices not in a common zone" },
356 * ibmvfc_get_ls_explain - Return the FC Explain description text
357 * @status: FC Explain status
362 static const char *ibmvfc_get_ls_explain(u16 status)
366 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
367 if (ls_explain[i].fc_explain == status)
368 return ls_explain[i].name;
370 return unknown_fc_explain;
374 * ibmvfc_get_gs_explain - Return the FC Explain description text
375 * @status: FC Explain status
380 static const char *ibmvfc_get_gs_explain(u16 status)
384 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
385 if (gs_explain[i].fc_explain == status)
386 return gs_explain[i].name;
388 return unknown_fc_explain;
391 static const struct {
392 enum ibmvfc_fc_type fc_type;
395 { IBMVFC_FABRIC_REJECT, "fabric reject" },
396 { IBMVFC_PORT_REJECT, "port reject" },
397 { IBMVFC_LS_REJECT, "ELS reject" },
398 { IBMVFC_FABRIC_BUSY, "fabric busy" },
399 { IBMVFC_PORT_BUSY, "port busy" },
400 { IBMVFC_BASIC_REJECT, "basic reject" },
403 static const char *unknown_fc_type = "unknown fc type";
406 * ibmvfc_get_fc_type - Return the FC Type description text
407 * @status: FC Type error status
412 static const char *ibmvfc_get_fc_type(u16 status)
416 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
417 if (fc_type[i].fc_type == status)
418 return fc_type[i].name;
420 return unknown_fc_type;
424 * ibmvfc_set_tgt_action - Set the next init action for the target
425 * @tgt: ibmvfc target struct
426 * @action: action to perform
429 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
430 enum ibmvfc_target_action action)
432 switch (tgt->action) {
433 case IBMVFC_TGT_ACTION_DEL_RPORT:
434 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
435 tgt->action = action;
436 case IBMVFC_TGT_ACTION_DELETED_RPORT:
439 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
441 tgt->action = action;
447 * ibmvfc_set_host_state - Set the state for the host
448 * @vhost: ibmvfc host struct
449 * @state: state to set host to
452 * 0 if state changed / non-zero if not changed
454 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
455 enum ibmvfc_host_state state)
459 switch (vhost->state) {
460 case IBMVFC_HOST_OFFLINE:
464 vhost->state = state;
472 * ibmvfc_set_host_action - Set the next init action for the host
473 * @vhost: ibmvfc host struct
474 * @action: action to perform
477 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
478 enum ibmvfc_host_action action)
481 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
482 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
483 vhost->action = action;
485 case IBMVFC_HOST_ACTION_LOGO_WAIT:
486 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
487 vhost->action = action;
489 case IBMVFC_HOST_ACTION_INIT_WAIT:
490 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
491 vhost->action = action;
493 case IBMVFC_HOST_ACTION_QUERY:
494 switch (vhost->action) {
495 case IBMVFC_HOST_ACTION_INIT_WAIT:
496 case IBMVFC_HOST_ACTION_NONE:
497 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
498 vhost->action = action;
504 case IBMVFC_HOST_ACTION_TGT_INIT:
505 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
506 vhost->action = action;
508 case IBMVFC_HOST_ACTION_INIT:
509 case IBMVFC_HOST_ACTION_TGT_DEL:
510 switch (vhost->action) {
511 case IBMVFC_HOST_ACTION_RESET:
512 case IBMVFC_HOST_ACTION_REENABLE:
515 vhost->action = action;
519 case IBMVFC_HOST_ACTION_LOGO:
520 case IBMVFC_HOST_ACTION_QUERY_TGTS:
521 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
522 case IBMVFC_HOST_ACTION_NONE:
523 case IBMVFC_HOST_ACTION_RESET:
524 case IBMVFC_HOST_ACTION_REENABLE:
526 vhost->action = action;
532 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
533 * @vhost: ibmvfc host struct
538 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
540 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
541 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
542 scsi_block_requests(vhost->host);
543 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
548 wake_up(&vhost->work_wait_q);
552 * ibmvfc_link_down - Handle a link down event from the adapter
553 * @vhost: ibmvfc host struct
554 * @state: ibmvfc host state to enter
557 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
558 enum ibmvfc_host_state state)
560 struct ibmvfc_target *tgt;
563 scsi_block_requests(vhost->host);
564 list_for_each_entry(tgt, &vhost->targets, queue)
565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
566 ibmvfc_set_host_state(vhost, state);
567 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
568 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
569 wake_up(&vhost->work_wait_q);
574 * ibmvfc_init_host - Start host initialization
575 * @vhost: ibmvfc host struct
580 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
582 struct ibmvfc_target *tgt;
584 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
585 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
587 "Host initialization retries exceeded. Taking adapter offline\n");
588 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
593 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
594 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
595 vhost->async_crq.cur = 0;
597 list_for_each_entry(tgt, &vhost->targets, queue)
598 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
599 scsi_block_requests(vhost->host);
600 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
601 vhost->job_step = ibmvfc_npiv_login;
602 wake_up(&vhost->work_wait_q);
607 * ibmvfc_send_crq - Send a CRQ
608 * @vhost: ibmvfc host struct
609 * @word1: the first 64 bits of the data
610 * @word2: the second 64 bits of the data
613 * 0 on success / other on failure
615 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
617 struct vio_dev *vdev = to_vio_dev(vhost->dev);
618 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
622 * ibmvfc_send_crq_init - Send a CRQ init message
623 * @vhost: ibmvfc host struct
626 * 0 on success / other on failure
628 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
630 ibmvfc_dbg(vhost, "Sending CRQ init\n");
631 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
635 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
636 * @vhost: ibmvfc host struct
639 * 0 on success / other on failure
641 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
643 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
644 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
648 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
649 * @vhost: ibmvfc host struct
651 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
652 * the crq with the hypervisor.
654 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
657 struct vio_dev *vdev = to_vio_dev(vhost->dev);
658 struct ibmvfc_crq_queue *crq = &vhost->crq;
660 ibmvfc_dbg(vhost, "Releasing CRQ\n");
661 free_irq(vdev->irq, vhost);
662 tasklet_kill(&vhost->tasklet);
666 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
667 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
669 vhost->state = IBMVFC_NO_CRQ;
670 vhost->logged_in = 0;
671 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
672 free_page((unsigned long)crq->msgs);
676 * ibmvfc_reenable_crq_queue - reenables the CRQ
677 * @vhost: ibmvfc host struct
680 * 0 on success / other on failure
682 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
685 struct vio_dev *vdev = to_vio_dev(vhost->dev);
687 /* Re-enable the CRQ */
691 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
692 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
695 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
701 * ibmvfc_reset_crq - resets a crq after a failure
702 * @vhost: ibmvfc host struct
705 * 0 on success / other on failure
707 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
711 struct vio_dev *vdev = to_vio_dev(vhost->dev);
712 struct ibmvfc_crq_queue *crq = &vhost->crq;
718 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
719 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
721 spin_lock_irqsave(vhost->host->host_lock, flags);
722 vhost->state = IBMVFC_NO_CRQ;
723 vhost->logged_in = 0;
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 = cpu_to_be16(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 (be64_to_cpu(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 be64_to_cpu(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 = cpu_to_be32(IBMVFC_OS_LINUX);
1178 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1179 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1180 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1181 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1182 login_info->vfc_frame_version = cpu_to_be32(1);
1183 login_info->fcp_version = cpu_to_be16(3);
1184 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
1185 if (vhost->client_migrated)
1186 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
1188 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1189 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1190 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1191 login_info->async.len = cpu_to_be32(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 = cpu_to_be64(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 = cpu_to_be64(sg_dma_address(sg));
1317 md[i].len = cpu_to_be32(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);
1342 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1344 sg_mapped = scsi_dma_map(scmd);
1346 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
1348 } else if (unlikely(sg_mapped < 0)) {
1349 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1350 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1354 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1355 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
1356 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1358 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
1359 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1362 if (sg_mapped == 1) {
1363 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1367 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
1369 if (!evt->ext_list) {
1370 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1371 &evt->ext_list_token);
1373 if (!evt->ext_list) {
1374 scsi_dma_unmap(scmd);
1375 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1376 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1381 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1383 data->va = cpu_to_be64(evt->ext_list_token);
1384 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
1390 * ibmvfc_timeout - Internal command timeout handler
1391 * @evt: struct ibmvfc_event that timed out
1393 * Called when an internally generated command times out
1395 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1397 struct ibmvfc_host *vhost = evt->vhost;
1398 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1399 ibmvfc_reset_host(vhost);
1403 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1404 * @evt: event to be sent
1405 * @vhost: ibmvfc host struct
1406 * @timeout: timeout in seconds - 0 means do not time command
1408 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1410 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1411 struct ibmvfc_host *vhost, unsigned long timeout)
1413 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
1416 /* Copy the IU into the transfer area */
1417 *evt->xfer_iu = evt->iu;
1418 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1419 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
1420 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1421 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
1425 list_add_tail(&evt->queue, &vhost->sent);
1426 init_timer(&evt->timer);
1429 evt->timer.data = (unsigned long) evt;
1430 evt->timer.expires = jiffies + (timeout * HZ);
1431 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1432 add_timer(&evt->timer);
1437 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1438 be64_to_cpu(crq_as_u64[1])))) {
1439 list_del(&evt->queue);
1440 del_timer(&evt->timer);
1442 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1443 * Firmware will send a CRQ with a transport event (0xFF) to
1444 * tell this client what has happened to the transport. This
1445 * will be handled in ibmvfc_handle_crq()
1447 if (rc == H_CLOSED) {
1448 if (printk_ratelimit())
1449 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1451 scsi_dma_unmap(evt->cmnd);
1452 ibmvfc_free_event(evt);
1453 return SCSI_MLQUEUE_HOST_BUSY;
1456 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1458 evt->cmnd->result = DID_ERROR << 16;
1459 evt->done = ibmvfc_scsi_eh_done;
1461 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
1465 ibmvfc_trc_start(evt);
1471 * ibmvfc_log_error - Log an error for the failed command if appropriate
1472 * @evt: ibmvfc event to log
1475 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1477 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1478 struct ibmvfc_host *vhost = evt->vhost;
1479 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1480 struct scsi_cmnd *cmnd = evt->cmnd;
1481 const char *err = unknown_error;
1482 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
1487 logerr = cmd_status[index].log;
1488 err = cmd_status[index].name;
1491 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1494 if (rsp->flags & FCP_RSP_LEN_VALID)
1495 rsp_code = rsp->data.info.rsp_code;
1497 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1498 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1499 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1500 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1504 * ibmvfc_relogin - Log back into the specified device
1505 * @sdev: scsi device struct
1508 static void ibmvfc_relogin(struct scsi_device *sdev)
1510 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1511 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1512 struct ibmvfc_target *tgt;
1514 list_for_each_entry(tgt, &vhost->targets, queue) {
1515 if (rport == tgt->rport) {
1516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1521 ibmvfc_reinit_host(vhost);
1525 * ibmvfc_scsi_done - Handle responses from commands
1526 * @evt: ibmvfc event to be handled
1528 * Used as a callback when sending scsi cmds.
1530 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1532 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1533 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1534 struct scsi_cmnd *cmnd = evt->cmnd;
1536 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
1539 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1540 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
1541 else if (rsp->flags & FCP_RESID_UNDER)
1542 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
1544 scsi_set_resid(cmnd, 0);
1546 if (vfc_cmd->status) {
1547 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1549 if (rsp->flags & FCP_RSP_LEN_VALID)
1550 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
1551 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1552 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1553 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1554 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1555 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1556 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
1557 ibmvfc_relogin(cmnd->device);
1559 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1560 cmnd->result = (DID_ERROR << 16);
1562 ibmvfc_log_error(evt);
1565 if (!cmnd->result &&
1566 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1567 cmnd->result = (DID_ERROR << 16);
1569 scsi_dma_unmap(cmnd);
1570 cmnd->scsi_done(cmnd);
1574 complete(evt->eh_comp);
1576 ibmvfc_free_event(evt);
1580 * ibmvfc_host_chkready - Check if the host can accept commands
1581 * @vhost: struct ibmvfc host
1584 * 1 if host can accept command / 0 if not
1586 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1590 switch (vhost->state) {
1591 case IBMVFC_LINK_DEAD:
1592 case IBMVFC_HOST_OFFLINE:
1593 result = DID_NO_CONNECT << 16;
1596 case IBMVFC_INITIALIZING:
1598 case IBMVFC_LINK_DOWN:
1599 result = DID_REQUEUE << 16;
1610 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1611 * @cmnd: struct scsi_cmnd to be executed
1612 * @done: Callback function to be called when cmnd is completed
1615 * 0 on success / other on failure
1617 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
1618 void (*done) (struct scsi_cmnd *))
1620 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1621 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1622 struct ibmvfc_cmd *vfc_cmd;
1623 struct ibmvfc_event *evt;
1626 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1627 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1633 cmnd->result = (DID_OK << 16);
1634 evt = ibmvfc_get_event(vhost);
1635 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1637 cmnd->scsi_done = done;
1638 vfc_cmd = &evt->iu.cmd;
1639 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1640 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1641 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1642 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1643 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1644 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1645 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1646 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1647 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1648 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1649 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1651 if (cmnd->flags & SCMD_TAGGED) {
1652 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1653 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1656 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1657 return ibmvfc_send_event(evt, vhost, 0);
1659 ibmvfc_free_event(evt);
1661 return SCSI_MLQUEUE_HOST_BUSY;
1663 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1664 scmd_printk(KERN_ERR, cmnd,
1665 "Failed to map DMA buffer for command. rc=%d\n", rc);
1667 cmnd->result = DID_ERROR << 16;
1672 static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1675 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1676 * @evt: ibmvfc event struct
1679 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1681 /* copy the response back */
1683 *evt->sync_iu = *evt->xfer_iu;
1685 complete(&evt->comp);
1689 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1690 * @evt: struct ibmvfc_event
1693 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1695 struct ibmvfc_host *vhost = evt->vhost;
1697 ibmvfc_free_event(evt);
1698 vhost->aborting_passthru = 0;
1699 dev_info(vhost->dev, "Passthru command cancelled\n");
1703 * ibmvfc_bsg_timeout - Handle a BSG timeout
1704 * @job: struct fc_bsg_job that timed out
1707 * 0 on success / other on failure
1709 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
1711 struct ibmvfc_host *vhost = shost_priv(job->shost);
1712 unsigned long port_id = (unsigned long)job->dd_data;
1713 struct ibmvfc_event *evt;
1714 struct ibmvfc_tmf *tmf;
1715 unsigned long flags;
1719 spin_lock_irqsave(vhost->host->host_lock, flags);
1720 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1721 __ibmvfc_reset_host(vhost);
1722 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1726 vhost->aborting_passthru = 1;
1727 evt = ibmvfc_get_event(vhost);
1728 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1731 memset(tmf, 0, sizeof(*tmf));
1732 tmf->common.version = cpu_to_be32(1);
1733 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1734 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1735 tmf->scsi_id = cpu_to_be64(port_id);
1736 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1737 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
1738 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1741 vhost->aborting_passthru = 0;
1742 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1745 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1748 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1755 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1756 * @vhost: struct ibmvfc_host to send command
1757 * @port_id: port ID to send command
1760 * 0 on success / other on failure
1762 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1764 struct ibmvfc_port_login *plogi;
1765 struct ibmvfc_target *tgt;
1766 struct ibmvfc_event *evt;
1767 union ibmvfc_iu rsp_iu;
1768 unsigned long flags;
1769 int rc = 0, issue_login = 1;
1772 spin_lock_irqsave(vhost->host->host_lock, flags);
1773 list_for_each_entry(tgt, &vhost->targets, queue) {
1774 if (tgt->scsi_id == port_id) {
1782 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1785 evt = ibmvfc_get_event(vhost);
1786 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1787 plogi = &evt->iu.plogi;
1788 memset(plogi, 0, sizeof(*plogi));
1789 plogi->common.version = cpu_to_be32(1);
1790 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1791 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1792 plogi->scsi_id = cpu_to_be64(port_id);
1793 evt->sync_iu = &rsp_iu;
1794 init_completion(&evt->comp);
1796 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1797 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1802 wait_for_completion(&evt->comp);
1804 if (rsp_iu.plogi.common.status)
1807 spin_lock_irqsave(vhost->host->host_lock, flags);
1808 ibmvfc_free_event(evt);
1810 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1816 * ibmvfc_bsg_request - Handle a BSG request
1817 * @job: struct fc_bsg_job to be executed
1820 * 0 on success / other on failure
1822 static int ibmvfc_bsg_request(struct fc_bsg_job *job)
1824 struct ibmvfc_host *vhost = shost_priv(job->shost);
1825 struct fc_rport *rport = job->rport;
1826 struct ibmvfc_passthru_mad *mad;
1827 struct ibmvfc_event *evt;
1828 union ibmvfc_iu rsp_iu;
1829 unsigned long flags, port_id = -1;
1830 unsigned int code = job->request->msgcode;
1831 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1832 u32 fc_flags, rsp_len;
1835 job->reply->reply_payload_rcv_len = 0;
1837 port_id = rport->port_id;
1840 case FC_BSG_HST_ELS_NOLOGIN:
1841 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
1842 (job->request->rqst_data.h_els.port_id[1] << 8) |
1843 job->request->rqst_data.h_els.port_id[2];
1844 case FC_BSG_RPT_ELS:
1845 fc_flags = IBMVFC_FC_ELS;
1849 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
1850 (job->request->rqst_data.h_ct.port_id[1] << 8) |
1851 job->request->rqst_data.h_ct.port_id[2];
1853 fc_flags = IBMVFC_FC_CT_IU;
1861 if (!mutex_trylock(&vhost->passthru_mutex))
1864 job->dd_data = (void *)port_id;
1865 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1866 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1869 mutex_unlock(&vhost->passthru_mutex);
1873 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1874 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1877 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1878 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1879 mutex_unlock(&vhost->passthru_mutex);
1883 if (req_seg > 1 || rsp_seg > 1) {
1889 rc = ibmvfc_bsg_plogi(vhost, port_id);
1891 spin_lock_irqsave(vhost->host->host_lock, flags);
1893 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1894 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1895 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1899 evt = ibmvfc_get_event(vhost);
1900 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1901 mad = &evt->iu.passthru;
1903 memset(mad, 0, sizeof(*mad));
1904 mad->common.version = cpu_to_be32(1);
1905 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1906 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1908 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1909 offsetof(struct ibmvfc_passthru_mad, iu));
1910 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1912 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1913 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1914 mad->iu.flags = cpu_to_be32(fc_flags);
1915 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1917 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1918 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1919 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1920 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1921 mad->iu.scsi_id = cpu_to_be64(port_id);
1922 mad->iu.tag = cpu_to_be64((u64)evt);
1923 rsp_len = be32_to_cpu(mad->iu.rsp.len);
1925 evt->sync_iu = &rsp_iu;
1926 init_completion(&evt->comp);
1927 rc = ibmvfc_send_event(evt, vhost, 0);
1928 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1935 wait_for_completion(&evt->comp);
1937 if (rsp_iu.passthru.common.status)
1940 job->reply->reply_payload_rcv_len = rsp_len;
1942 spin_lock_irqsave(vhost->host->host_lock, flags);
1943 ibmvfc_free_event(evt);
1944 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1945 job->reply->result = rc;
1949 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1950 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1951 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1952 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1953 mutex_unlock(&vhost->passthru_mutex);
1959 * ibmvfc_reset_device - Reset the device with the specified reset type
1960 * @sdev: scsi device to reset
1962 * @desc: reset type description for log messages
1965 * 0 on success / other on failure
1967 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1969 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1970 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1971 struct ibmvfc_cmd *tmf;
1972 struct ibmvfc_event *evt = NULL;
1973 union ibmvfc_iu rsp_iu;
1974 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1975 int rsp_rc = -EBUSY;
1976 unsigned long flags;
1979 spin_lock_irqsave(vhost->host->host_lock, flags);
1980 if (vhost->state == IBMVFC_ACTIVE) {
1981 evt = ibmvfc_get_event(vhost);
1982 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1985 memset(tmf, 0, sizeof(*tmf));
1986 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1987 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1988 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1989 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1990 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1991 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1992 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
1993 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1994 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
1995 tmf->iu.tmf_flags = type;
1996 evt->sync_iu = &rsp_iu;
1998 init_completion(&evt->comp);
1999 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2001 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2004 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2009 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2010 wait_for_completion(&evt->comp);
2012 if (rsp_iu.cmd.status)
2013 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2016 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2017 rsp_code = fc_rsp->data.info.rsp_code;
2019 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2020 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2021 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2022 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2023 fc_rsp->scsi_status);
2026 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2028 spin_lock_irqsave(vhost->host->host_lock, flags);
2029 ibmvfc_free_event(evt);
2030 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2035 * ibmvfc_match_rport - Match function for specified remote port
2036 * @evt: ibmvfc event struct
2037 * @device: device to match (rport)
2040 * 1 if event matches rport / 0 if event does not match rport
2042 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
2044 struct fc_rport *cmd_rport;
2047 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2048 if (cmd_rport == rport)
2055 * ibmvfc_match_target - Match function for specified target
2056 * @evt: ibmvfc event struct
2057 * @device: device to match (starget)
2060 * 1 if event matches starget / 0 if event does not match starget
2062 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2064 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2070 * ibmvfc_match_lun - Match function for specified LUN
2071 * @evt: ibmvfc event struct
2072 * @device: device to match (sdev)
2075 * 1 if event matches sdev / 0 if event does not match sdev
2077 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2079 if (evt->cmnd && evt->cmnd->device == device)
2085 * ibmvfc_wait_for_ops - Wait for ops to complete
2086 * @vhost: ibmvfc host struct
2087 * @device: device to match (starget or sdev)
2088 * @match: match function
2093 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2094 int (*match) (struct ibmvfc_event *, void *))
2096 struct ibmvfc_event *evt;
2097 DECLARE_COMPLETION_ONSTACK(comp);
2099 unsigned long flags;
2100 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2105 spin_lock_irqsave(vhost->host->host_lock, flags);
2106 list_for_each_entry(evt, &vhost->sent, queue) {
2107 if (match(evt, device)) {
2108 evt->eh_comp = ∁
2112 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2115 timeout = wait_for_completion_timeout(&comp, timeout);
2119 spin_lock_irqsave(vhost->host->host_lock, flags);
2120 list_for_each_entry(evt, &vhost->sent, queue) {
2121 if (match(evt, device)) {
2122 evt->eh_comp = NULL;
2126 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2128 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2130 return wait ? FAILED : SUCCESS;
2140 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2141 * @sdev: scsi device to cancel commands
2142 * @type: type of error recovery being performed
2144 * This sends a cancel to the VIOS for the specified device. This does
2145 * NOT send any abort to the actual device. That must be done separately.
2148 * 0 on success / other on failure
2150 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2152 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2153 struct scsi_target *starget = scsi_target(sdev);
2154 struct fc_rport *rport = starget_to_rport(starget);
2155 struct ibmvfc_tmf *tmf;
2156 struct ibmvfc_event *evt, *found_evt;
2157 union ibmvfc_iu rsp;
2158 int rsp_rc = -EBUSY;
2159 unsigned long flags;
2163 spin_lock_irqsave(vhost->host->host_lock, flags);
2165 list_for_each_entry(evt, &vhost->sent, queue) {
2166 if (evt->cmnd && evt->cmnd->device == sdev) {
2173 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2174 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2175 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2179 if (vhost->logged_in) {
2180 evt = ibmvfc_get_event(vhost);
2181 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2184 memset(tmf, 0, sizeof(*tmf));
2185 tmf->common.version = cpu_to_be32(1);
2186 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2187 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2188 tmf->scsi_id = cpu_to_be64(rport->port_id);
2189 int_to_scsilun(sdev->lun, &tmf->lun);
2190 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
2191 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
2192 if (vhost->state == IBMVFC_ACTIVE)
2193 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
2195 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2196 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2197 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
2199 evt->sync_iu = &rsp;
2200 init_completion(&evt->comp);
2201 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2204 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2207 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2208 /* If failure is received, the host adapter is most likely going
2209 through reset, return success so the caller will wait for the command
2210 being cancelled to get returned */
2214 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2216 wait_for_completion(&evt->comp);
2217 status = be16_to_cpu(rsp.mad_common.status);
2218 spin_lock_irqsave(vhost->host->host_lock, flags);
2219 ibmvfc_free_event(evt);
2220 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2222 if (status != IBMVFC_MAD_SUCCESS) {
2223 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2225 case IBMVFC_MAD_DRIVER_FAILED:
2226 case IBMVFC_MAD_CRQ_ERROR:
2227 /* Host adapter most likely going through reset, return success to
2228 the caller will wait for the command being cancelled to get returned */
2235 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2240 * ibmvfc_match_key - Match function for specified cancel key
2241 * @evt: ibmvfc event struct
2242 * @key: cancel key to match
2245 * 1 if event matches key / 0 if event does not match key
2247 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
2249 unsigned long cancel_key = (unsigned long)key;
2251 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
2252 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
2258 * ibmvfc_match_evt - Match function for specified event
2259 * @evt: ibmvfc event struct
2260 * @match: event to match
2263 * 1 if event matches key / 0 if event does not match key
2265 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2273 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2274 * @sdev: scsi device to abort commands
2276 * This sends an Abort Task Set to the VIOS for the specified device. This does
2277 * NOT send any cancel to the VIOS. That must be done separately.
2280 * 0 on success / other on failure
2282 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2284 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2285 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2286 struct ibmvfc_cmd *tmf;
2287 struct ibmvfc_event *evt, *found_evt;
2288 union ibmvfc_iu rsp_iu;
2289 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2290 int rc, rsp_rc = -EBUSY;
2291 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2294 spin_lock_irqsave(vhost->host->host_lock, flags);
2296 list_for_each_entry(evt, &vhost->sent, queue) {
2297 if (evt->cmnd && evt->cmnd->device == sdev) {
2304 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2305 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2306 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2310 if (vhost->state == IBMVFC_ACTIVE) {
2311 evt = ibmvfc_get_event(vhost);
2312 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2315 memset(tmf, 0, sizeof(*tmf));
2316 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2317 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2318 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2319 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2320 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2321 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2322 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
2323 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2324 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2325 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2326 evt->sync_iu = &rsp_iu;
2328 init_completion(&evt->comp);
2329 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2332 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2335 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2339 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2340 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2343 rc = ibmvfc_cancel_all(sdev, 0);
2345 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2351 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2352 ibmvfc_reset_host(vhost);
2354 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2359 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2360 if (rc != SUCCESS) {
2361 spin_lock_irqsave(vhost->host->host_lock, flags);
2362 ibmvfc_hard_reset_host(vhost);
2363 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2371 if (rsp_iu.cmd.status)
2372 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2375 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2376 rsp_code = fc_rsp->data.info.rsp_code;
2378 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2379 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2380 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2381 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2382 fc_rsp->scsi_status);
2385 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2388 spin_lock_irqsave(vhost->host->host_lock, flags);
2389 ibmvfc_free_event(evt);
2390 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2395 * ibmvfc_eh_abort_handler - Abort a command
2396 * @cmd: scsi command to abort
2399 * SUCCESS / FAST_IO_FAIL / FAILED
2401 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2403 struct scsi_device *sdev = cmd->device;
2404 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2405 int cancel_rc, block_rc;
2409 block_rc = fc_block_scsi_eh(cmd);
2410 ibmvfc_wait_while_resetting(vhost);
2411 if (block_rc != FAST_IO_FAIL) {
2412 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2413 ibmvfc_abort_task_set(sdev);
2415 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2418 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2420 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2428 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2429 * @cmd: scsi command struct
2432 * SUCCESS / FAST_IO_FAIL / FAILED
2434 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2436 struct scsi_device *sdev = cmd->device;
2437 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2438 int cancel_rc, block_rc, reset_rc = 0;
2442 block_rc = fc_block_scsi_eh(cmd);
2443 ibmvfc_wait_while_resetting(vhost);
2444 if (block_rc != FAST_IO_FAIL) {
2445 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2446 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2448 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2450 if (!cancel_rc && !reset_rc)
2451 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2453 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2461 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2462 * @sdev: scsi device struct
2463 * @data: return code
2466 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2468 unsigned long *rc = data;
2469 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2473 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2474 * @sdev: scsi device struct
2475 * @data: return code
2478 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2480 unsigned long *rc = data;
2481 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2485 * ibmvfc_eh_target_reset_handler - Reset the target
2486 * @cmd: scsi command struct
2489 * SUCCESS / FAST_IO_FAIL / FAILED
2491 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2493 struct scsi_device *sdev = cmd->device;
2494 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2495 struct scsi_target *starget = scsi_target(sdev);
2499 unsigned long cancel_rc = 0;
2502 block_rc = fc_block_scsi_eh(cmd);
2503 ibmvfc_wait_while_resetting(vhost);
2504 if (block_rc != FAST_IO_FAIL) {
2505 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2506 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2508 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
2510 if (!cancel_rc && !reset_rc)
2511 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2513 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2521 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2522 * @cmd: struct scsi_cmnd having problems
2525 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2528 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2530 block_rc = fc_block_scsi_eh(cmd);
2531 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2532 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2534 if (block_rc == FAST_IO_FAIL)
2535 return FAST_IO_FAIL;
2537 return rc ? FAILED : SUCCESS;
2541 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2542 * @rport: rport struct
2547 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2549 struct Scsi_Host *shost = rport_to_shost(rport);
2550 struct ibmvfc_host *vhost = shost_priv(shost);
2551 struct fc_rport *dev_rport;
2552 struct scsi_device *sdev;
2556 shost_for_each_device(sdev, shost) {
2557 dev_rport = starget_to_rport(scsi_target(sdev));
2558 if (dev_rport != rport)
2560 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2563 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
2566 ibmvfc_issue_fc_host_lip(shost);
2570 static const struct ibmvfc_async_desc ae_desc [] = {
2571 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2572 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2573 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2574 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2575 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2576 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2577 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2578 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2579 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2580 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2581 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2582 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2583 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
2586 static const struct ibmvfc_async_desc unknown_ae = {
2587 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
2591 * ibmvfc_get_ae_desc - Get text description for async event
2595 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
2599 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2600 if (ae_desc[i].ae == ae)
2606 static const struct {
2607 enum ibmvfc_ae_link_state state;
2610 { IBMVFC_AE_LS_LINK_UP, " link up" },
2611 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2612 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2613 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2617 * ibmvfc_get_link_state - Get text description for link state
2618 * @state: link state
2621 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2625 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2626 if (link_desc[i].state == state)
2627 return link_desc[i].desc;
2633 * ibmvfc_handle_async - Handle an async event from the adapter
2634 * @crq: crq to process
2635 * @vhost: ibmvfc host struct
2638 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2639 struct ibmvfc_host *vhost)
2641 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
2642 struct ibmvfc_target *tgt;
2644 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
2645 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2646 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
2647 ibmvfc_get_link_state(crq->link_state));
2649 switch (be64_to_cpu(crq->event)) {
2650 case IBMVFC_AE_RESUME:
2651 switch (crq->link_state) {
2652 case IBMVFC_AE_LS_LINK_DOWN:
2653 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2655 case IBMVFC_AE_LS_LINK_DEAD:
2656 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2658 case IBMVFC_AE_LS_LINK_UP:
2659 case IBMVFC_AE_LS_LINK_BOUNCED:
2661 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2662 vhost->delay_init = 1;
2663 __ibmvfc_reset_host(vhost);
2668 case IBMVFC_AE_LINK_UP:
2669 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2670 vhost->delay_init = 1;
2671 __ibmvfc_reset_host(vhost);
2673 case IBMVFC_AE_SCN_FABRIC:
2674 case IBMVFC_AE_SCN_DOMAIN:
2675 vhost->events_to_log |= IBMVFC_AE_RSCN;
2676 if (vhost->state < IBMVFC_HALTED) {
2677 vhost->delay_init = 1;
2678 __ibmvfc_reset_host(vhost);
2681 case IBMVFC_AE_SCN_NPORT:
2682 case IBMVFC_AE_SCN_GROUP:
2683 vhost->events_to_log |= IBMVFC_AE_RSCN;
2684 ibmvfc_reinit_host(vhost);
2686 case IBMVFC_AE_ELS_LOGO:
2687 case IBMVFC_AE_ELS_PRLO:
2688 case IBMVFC_AE_ELS_PLOGI:
2689 list_for_each_entry(tgt, &vhost->targets, queue) {
2690 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2692 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
2694 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
2696 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
2698 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
2700 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
2701 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2702 ibmvfc_reinit_host(vhost);
2706 case IBMVFC_AE_LINK_DOWN:
2707 case IBMVFC_AE_ADAPTER_FAILED:
2708 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2710 case IBMVFC_AE_LINK_DEAD:
2711 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2713 case IBMVFC_AE_HALT:
2714 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2717 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2723 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2724 * @crq: Command/Response queue
2725 * @vhost: ibmvfc host struct
2728 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2731 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
2733 switch (crq->valid) {
2734 case IBMVFC_CRQ_INIT_RSP:
2735 switch (crq->format) {
2736 case IBMVFC_CRQ_INIT:
2737 dev_info(vhost->dev, "Partner initialized\n");
2738 /* Send back a response */
2739 rc = ibmvfc_send_crq_init_complete(vhost);
2741 ibmvfc_init_host(vhost);
2743 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2745 case IBMVFC_CRQ_INIT_COMPLETE:
2746 dev_info(vhost->dev, "Partner initialization complete\n");
2747 ibmvfc_init_host(vhost);
2750 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2753 case IBMVFC_CRQ_XPORT_EVENT:
2754 vhost->state = IBMVFC_NO_CRQ;
2755 vhost->logged_in = 0;
2756 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2757 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2758 /* We need to re-setup the interpartition connection */
2759 dev_info(vhost->dev, "Re-enabling adapter\n");
2760 vhost->client_migrated = 1;
2761 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2762 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2763 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
2765 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2766 ibmvfc_purge_requests(vhost, DID_ERROR);
2767 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2768 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
2771 case IBMVFC_CRQ_CMD_RSP:
2774 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2778 if (crq->format == IBMVFC_ASYNC_EVENT)
2781 /* The only kind of payload CRQs we should get are responses to
2782 * things we send. Make sure this response is to something we
2785 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2786 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2791 if (unlikely(atomic_read(&evt->free))) {
2792 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2797 del_timer(&evt->timer);
2798 list_del(&evt->queue);
2799 ibmvfc_trc_end(evt);
2804 * ibmvfc_scan_finished - Check if the device scan is done.
2805 * @shost: scsi host struct
2806 * @time: current elapsed time
2809 * 0 if scan is not done / 1 if scan is done
2811 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2813 unsigned long flags;
2814 struct ibmvfc_host *vhost = shost_priv(shost);
2817 spin_lock_irqsave(shost->host_lock, flags);
2818 if (time >= (init_timeout * HZ)) {
2819 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2820 "continuing initialization\n", init_timeout);
2824 if (vhost->scan_complete)
2826 spin_unlock_irqrestore(shost->host_lock, flags);
2831 * ibmvfc_slave_alloc - Setup the device's task set value
2832 * @sdev: struct scsi_device device to configure
2834 * Set the device's task set value so that error handling works as
2838 * 0 on success / -ENXIO if device does not exist
2840 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2842 struct Scsi_Host *shost = sdev->host;
2843 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2844 struct ibmvfc_host *vhost = shost_priv(shost);
2845 unsigned long flags = 0;
2847 if (!rport || fc_remote_port_chkready(rport))
2850 spin_lock_irqsave(shost->host_lock, flags);
2851 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2852 spin_unlock_irqrestore(shost->host_lock, flags);
2857 * ibmvfc_target_alloc - Setup the target's task set value
2858 * @starget: struct scsi_target
2860 * Set the target's task set value so that error handling works as
2864 * 0 on success / -ENXIO if device does not exist
2866 static int ibmvfc_target_alloc(struct scsi_target *starget)
2868 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2869 struct ibmvfc_host *vhost = shost_priv(shost);
2870 unsigned long flags = 0;
2872 spin_lock_irqsave(shost->host_lock, flags);
2873 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2874 spin_unlock_irqrestore(shost->host_lock, flags);
2879 * ibmvfc_slave_configure - Configure the device
2880 * @sdev: struct scsi_device device to configure
2882 * Enable allow_restart for a device if it is a disk. Adjust the
2883 * queue_depth here also.
2888 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2890 struct Scsi_Host *shost = sdev->host;
2891 unsigned long flags = 0;
2893 spin_lock_irqsave(shost->host_lock, flags);
2894 if (sdev->type == TYPE_DISK) {
2895 sdev->allow_restart = 1;
2896 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ);
2898 spin_unlock_irqrestore(shost->host_lock, flags);
2903 * ibmvfc_change_queue_depth - Change the device's queue depth
2904 * @sdev: scsi device struct
2905 * @qdepth: depth to set
2906 * @reason: calling context
2911 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2913 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2914 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2916 return scsi_change_queue_depth(sdev, qdepth);
2919 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2920 struct device_attribute *attr, char *buf)
2922 struct Scsi_Host *shost = class_to_shost(dev);
2923 struct ibmvfc_host *vhost = shost_priv(shost);
2925 return snprintf(buf, PAGE_SIZE, "%s\n",
2926 vhost->login_buf->resp.partition_name);
2929 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2930 struct device_attribute *attr, char *buf)
2932 struct Scsi_Host *shost = class_to_shost(dev);
2933 struct ibmvfc_host *vhost = shost_priv(shost);
2935 return snprintf(buf, PAGE_SIZE, "%s\n",
2936 vhost->login_buf->resp.device_name);
2939 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2940 struct device_attribute *attr, char *buf)
2942 struct Scsi_Host *shost = class_to_shost(dev);
2943 struct ibmvfc_host *vhost = shost_priv(shost);
2945 return snprintf(buf, PAGE_SIZE, "%s\n",
2946 vhost->login_buf->resp.port_loc_code);
2949 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2950 struct device_attribute *attr, char *buf)
2952 struct Scsi_Host *shost = class_to_shost(dev);
2953 struct ibmvfc_host *vhost = shost_priv(shost);
2955 return snprintf(buf, PAGE_SIZE, "%s\n",
2956 vhost->login_buf->resp.drc_name);
2959 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2960 struct device_attribute *attr, char *buf)
2962 struct Scsi_Host *shost = class_to_shost(dev);
2963 struct ibmvfc_host *vhost = shost_priv(shost);
2964 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2967 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2968 struct device_attribute *attr, char *buf)
2970 struct Scsi_Host *shost = class_to_shost(dev);
2971 struct ibmvfc_host *vhost = shost_priv(shost);
2972 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2976 * ibmvfc_show_log_level - Show the adapter's error logging level
2977 * @dev: class device struct
2981 * number of bytes printed to buffer
2983 static ssize_t ibmvfc_show_log_level(struct device *dev,
2984 struct device_attribute *attr, char *buf)
2986 struct Scsi_Host *shost = class_to_shost(dev);
2987 struct ibmvfc_host *vhost = shost_priv(shost);
2988 unsigned long flags = 0;
2991 spin_lock_irqsave(shost->host_lock, flags);
2992 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2993 spin_unlock_irqrestore(shost->host_lock, flags);
2998 * ibmvfc_store_log_level - Change the adapter's error logging level
2999 * @dev: class device struct
3003 * number of bytes printed to buffer
3005 static ssize_t ibmvfc_store_log_level(struct device *dev,
3006 struct device_attribute *attr,
3007 const char *buf, size_t count)
3009 struct Scsi_Host *shost = class_to_shost(dev);
3010 struct ibmvfc_host *vhost = shost_priv(shost);
3011 unsigned long flags = 0;
3013 spin_lock_irqsave(shost->host_lock, flags);
3014 vhost->log_level = simple_strtoul(buf, NULL, 10);
3015 spin_unlock_irqrestore(shost->host_lock, flags);
3019 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3020 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3021 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3022 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3023 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
3024 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
3025 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3026 ibmvfc_show_log_level, ibmvfc_store_log_level);
3028 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3030 * ibmvfc_read_trace - Dump the adapter trace
3031 * @filp: open sysfs file
3032 * @kobj: kobject struct
3033 * @bin_attr: bin_attribute struct
3036 * @count: buffer size
3039 * number of bytes printed to buffer
3041 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
3042 struct bin_attribute *bin_attr,
3043 char *buf, loff_t off, size_t count)
3045 struct device *dev = container_of(kobj, struct device, kobj);
3046 struct Scsi_Host *shost = class_to_shost(dev);
3047 struct ibmvfc_host *vhost = shost_priv(shost);
3048 unsigned long flags = 0;
3049 int size = IBMVFC_TRACE_SIZE;
3050 char *src = (char *)vhost->trace;
3054 if (off + count > size) {
3059 spin_lock_irqsave(shost->host_lock, flags);
3060 memcpy(buf, &src[off], count);
3061 spin_unlock_irqrestore(shost->host_lock, flags);
3065 static struct bin_attribute ibmvfc_trace_attr = {
3071 .read = ibmvfc_read_trace,
3075 static struct device_attribute *ibmvfc_attrs[] = {
3076 &dev_attr_partition_name,
3077 &dev_attr_device_name,
3078 &dev_attr_port_loc_code,
3080 &dev_attr_npiv_version,
3081 &dev_attr_capabilities,
3082 &dev_attr_log_level,
3086 static struct scsi_host_template driver_template = {
3087 .module = THIS_MODULE,
3088 .name = "IBM POWER Virtual FC Adapter",
3089 .proc_name = IBMVFC_NAME,
3090 .queuecommand = ibmvfc_queuecommand,
3091 .eh_abort_handler = ibmvfc_eh_abort_handler,
3092 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3093 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3094 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3095 .slave_alloc = ibmvfc_slave_alloc,
3096 .slave_configure = ibmvfc_slave_configure,
3097 .target_alloc = ibmvfc_target_alloc,
3098 .scan_finished = ibmvfc_scan_finished,
3099 .change_queue_depth = ibmvfc_change_queue_depth,
3101 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3103 .sg_tablesize = SG_ALL,
3104 .max_sectors = IBMVFC_MAX_SECTORS,
3105 .use_clustering = ENABLE_CLUSTERING,
3106 .shost_attrs = ibmvfc_attrs,
3107 .track_queue_depth = 1,
3111 * ibmvfc_next_async_crq - Returns the next entry in async queue
3112 * @vhost: ibmvfc host struct
3115 * Pointer to next entry in queue / NULL if empty
3117 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3119 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3120 struct ibmvfc_async_crq *crq;
3122 crq = &async_crq->msgs[async_crq->cur];
3123 if (crq->valid & 0x80) {
3124 if (++async_crq->cur == async_crq->size)
3134 * ibmvfc_next_crq - Returns the next entry in message queue
3135 * @vhost: ibmvfc host struct
3138 * Pointer to next entry in queue / NULL if empty
3140 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3142 struct ibmvfc_crq_queue *queue = &vhost->crq;
3143 struct ibmvfc_crq *crq;
3145 crq = &queue->msgs[queue->cur];
3146 if (crq->valid & 0x80) {
3147 if (++queue->cur == queue->size)
3157 * ibmvfc_interrupt - Interrupt handler
3158 * @irq: number of irq to handle, not used
3159 * @dev_instance: ibmvfc_host that received interrupt
3164 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3166 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3167 unsigned long flags;
3169 spin_lock_irqsave(vhost->host->host_lock, flags);
3170 vio_disable_interrupts(to_vio_dev(vhost->dev));
3171 tasklet_schedule(&vhost->tasklet);
3172 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3177 * ibmvfc_tasklet - Interrupt handler tasklet
3178 * @data: ibmvfc host struct
3183 static void ibmvfc_tasklet(void *data)
3185 struct ibmvfc_host *vhost = data;
3186 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3187 struct ibmvfc_crq *crq;
3188 struct ibmvfc_async_crq *async;
3189 unsigned long flags;
3192 spin_lock_irqsave(vhost->host->host_lock, flags);
3194 /* Pull all the valid messages off the async CRQ */
3195 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3196 ibmvfc_handle_async(async, vhost);
3201 /* Pull all the valid messages off the CRQ */
3202 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3203 ibmvfc_handle_crq(crq, vhost);
3208 vio_enable_interrupts(vdev);
3209 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3210 vio_disable_interrupts(vdev);
3211 ibmvfc_handle_async(async, vhost);
3214 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3215 vio_disable_interrupts(vdev);
3216 ibmvfc_handle_crq(crq, vhost);
3223 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3227 * ibmvfc_init_tgt - Set the next init job step for the target
3228 * @tgt: ibmvfc target struct
3229 * @job_step: job step to perform
3232 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3233 void (*job_step) (struct ibmvfc_target *))
3235 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3236 tgt->job_step = job_step;
3237 wake_up(&tgt->vhost->work_wait_q);
3241 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3242 * @tgt: ibmvfc target struct
3243 * @job_step: initialization job step
3245 * Returns: 1 if step will be retried / 0 if not
3248 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3249 void (*job_step) (struct ibmvfc_target *))
3251 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3252 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3253 wake_up(&tgt->vhost->work_wait_q);
3256 ibmvfc_init_tgt(tgt, job_step);
3260 /* Defined in FC-LS */
3261 static const struct {
3278 * ibmvfc_get_prli_rsp - Find PRLI response index
3279 * @flags: PRLI response flags
3282 static int ibmvfc_get_prli_rsp(u16 flags)
3285 int code = (flags & 0x0f00) >> 8;
3287 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3288 if (prli_rsp[i].code == code)
3295 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3296 * @evt: ibmvfc event struct
3299 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3301 struct ibmvfc_target *tgt = evt->tgt;
3302 struct ibmvfc_host *vhost = evt->vhost;
3303 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3304 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3305 u32 status = be16_to_cpu(rsp->common.status);
3306 int index, 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, "Process Login succeeded: %X %02X %04X\n",
3313 parms->type, parms->flags, parms->service_parms);
3315 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3316 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
3317 if (prli_rsp[index].logged_in) {
3318 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
3319 tgt->need_login = 0;
3321 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
3322 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3323 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
3324 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3327 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3328 } else if (prli_rsp[index].retry)
3329 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3331 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3333 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3335 case IBMVFC_MAD_DRIVER_FAILED:
3337 case IBMVFC_MAD_CRQ_ERROR:
3338 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3340 case IBMVFC_MAD_FAILED:
3342 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3343 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
3344 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3345 else if (tgt->logo_rcvd)
3346 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3347 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3348 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3350 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3352 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3353 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3354 rsp->status, rsp->error, status);
3358 kref_put(&tgt->kref, ibmvfc_release_tgt);
3359 ibmvfc_free_event(evt);
3360 wake_up(&vhost->work_wait_q);
3364 * ibmvfc_tgt_send_prli - Send a process login
3365 * @tgt: ibmvfc target struct
3368 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3370 struct ibmvfc_process_login *prli;
3371 struct ibmvfc_host *vhost = tgt->vhost;
3372 struct ibmvfc_event *evt;
3374 if (vhost->discovery_threads >= disc_threads)
3377 kref_get(&tgt->kref);
3378 evt = ibmvfc_get_event(vhost);
3379 vhost->discovery_threads++;
3380 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3382 prli = &evt->iu.prli;
3383 memset(prli, 0, sizeof(*prli));
3384 prli->common.version = cpu_to_be32(1);
3385 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3386 prli->common.length = cpu_to_be16(sizeof(*prli));
3387 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
3389 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3390 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3391 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
3392 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
3395 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3397 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3398 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3399 vhost->discovery_threads--;
3400 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3401 kref_put(&tgt->kref, ibmvfc_release_tgt);
3403 tgt_dbg(tgt, "Sent process login\n");
3407 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3408 * @evt: ibmvfc event struct
3411 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3413 struct ibmvfc_target *tgt = evt->tgt;
3414 struct ibmvfc_host *vhost = evt->vhost;
3415 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3416 u32 status = be16_to_cpu(rsp->common.status);
3417 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3419 vhost->discovery_threads--;
3420 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3422 case IBMVFC_MAD_SUCCESS:
3423 tgt_dbg(tgt, "Port Login succeeded\n");
3424 if (tgt->ids.port_name &&
3425 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3427 tgt_dbg(tgt, "Port re-init required\n");
3430 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3431 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3432 tgt->ids.port_id = tgt->scsi_id;
3433 memcpy(&tgt->service_parms, &rsp->service_parms,
3434 sizeof(tgt->service_parms));
3435 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3436 sizeof(tgt->service_parms_change));
3437 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3439 case IBMVFC_MAD_DRIVER_FAILED:
3441 case IBMVFC_MAD_CRQ_ERROR:
3442 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3444 case IBMVFC_MAD_FAILED:
3446 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3447 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3449 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3451 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3452 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error,
3453 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type,
3454 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status);
3458 kref_put(&tgt->kref, ibmvfc_release_tgt);
3459 ibmvfc_free_event(evt);
3460 wake_up(&vhost->work_wait_q);
3464 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3465 * @tgt: ibmvfc target struct
3468 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3470 struct ibmvfc_port_login *plogi;
3471 struct ibmvfc_host *vhost = tgt->vhost;
3472 struct ibmvfc_event *evt;
3474 if (vhost->discovery_threads >= disc_threads)
3477 kref_get(&tgt->kref);
3479 evt = ibmvfc_get_event(vhost);
3480 vhost->discovery_threads++;
3481 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3482 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3484 plogi = &evt->iu.plogi;
3485 memset(plogi, 0, sizeof(*plogi));
3486 plogi->common.version = cpu_to_be32(1);
3487 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3488 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3489 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
3491 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3492 vhost->discovery_threads--;
3493 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3494 kref_put(&tgt->kref, ibmvfc_release_tgt);
3496 tgt_dbg(tgt, "Sent port login\n");
3500 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3501 * @evt: ibmvfc event struct
3504 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3506 struct ibmvfc_target *tgt = evt->tgt;
3507 struct ibmvfc_host *vhost = evt->vhost;
3508 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3509 u32 status = be16_to_cpu(rsp->common.status);
3511 vhost->discovery_threads--;
3512 ibmvfc_free_event(evt);
3513 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3516 case IBMVFC_MAD_SUCCESS:
3517 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3519 case IBMVFC_MAD_DRIVER_FAILED:
3520 kref_put(&tgt->kref, ibmvfc_release_tgt);
3521 wake_up(&vhost->work_wait_q);
3523 case IBMVFC_MAD_FAILED:
3525 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3529 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3530 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3531 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3532 tgt->scsi_id != tgt->new_scsi_id)
3533 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3534 kref_put(&tgt->kref, ibmvfc_release_tgt);
3535 wake_up(&vhost->work_wait_q);
3539 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3540 * @tgt: ibmvfc target struct
3543 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3545 struct ibmvfc_implicit_logout *mad;
3546 struct ibmvfc_host *vhost = tgt->vhost;
3547 struct ibmvfc_event *evt;
3549 if (vhost->discovery_threads >= disc_threads)
3552 kref_get(&tgt->kref);
3553 evt = ibmvfc_get_event(vhost);
3554 vhost->discovery_threads++;
3555 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3557 mad = &evt->iu.implicit_logout;
3558 memset(mad, 0, sizeof(*mad));
3559 mad->common.version = cpu_to_be32(1);
3560 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3561 mad->common.length = cpu_to_be16(sizeof(*mad));
3562 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
3564 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3565 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3566 vhost->discovery_threads--;
3567 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3568 kref_put(&tgt->kref, ibmvfc_release_tgt);
3570 tgt_dbg(tgt, "Sent Implicit Logout\n");
3574 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3575 * @mad: ibmvfc passthru mad struct
3576 * @tgt: ibmvfc target struct
3579 * 1 if PLOGI needed / 0 if PLOGI not needed
3581 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3582 struct ibmvfc_target *tgt)
3584 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3585 sizeof(tgt->ids.port_name)))
3587 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3588 sizeof(tgt->ids.node_name)))
3590 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
3596 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3597 * @evt: ibmvfc event struct
3600 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3602 struct ibmvfc_target *tgt = evt->tgt;
3603 struct ibmvfc_host *vhost = evt->vhost;
3604 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3605 u32 status = be16_to_cpu(mad->common.status);
3606 u8 fc_reason, fc_explain;
3608 vhost->discovery_threads--;
3609 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3610 del_timer(&tgt->timer);
3613 case IBMVFC_MAD_SUCCESS:
3614 tgt_dbg(tgt, "ADISC succeeded\n");
3615 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3616 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3618 case IBMVFC_MAD_DRIVER_FAILED:
3620 case IBMVFC_MAD_FAILED:
3622 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3623 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3624 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
3625 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3626 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
3627 mad->iu.status, mad->iu.error,
3628 ibmvfc_get_fc_type(fc_reason), fc_reason,
3629 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3633 kref_put(&tgt->kref, ibmvfc_release_tgt);
3634 ibmvfc_free_event(evt);
3635 wake_up(&vhost->work_wait_q);
3639 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3640 * @evt: ibmvfc event struct
3643 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3645 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3647 memset(mad, 0, sizeof(*mad));
3648 mad->common.version = cpu_to_be32(1);
3649 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3650 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3651 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3652 offsetof(struct ibmvfc_passthru_mad, iu));
3653 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3654 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3655 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3656 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3657 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3658 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3659 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3660 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3661 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3662 offsetof(struct ibmvfc_passthru_fc_iu, response));
3663 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
3667 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3668 * @evt: ibmvfc event struct
3670 * Just cleanup this event struct. Everything else is handled by
3671 * the ADISC completion handler. If the ADISC never actually comes
3672 * back, we still have the timer running on the ADISC event struct
3673 * which will fire and cause the CRQ to get reset.
3676 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3678 struct ibmvfc_host *vhost = evt->vhost;
3679 struct ibmvfc_target *tgt = evt->tgt;
3681 tgt_dbg(tgt, "ADISC cancel complete\n");
3682 vhost->abort_threads--;
3683 ibmvfc_free_event(evt);
3684 kref_put(&tgt->kref, ibmvfc_release_tgt);
3685 wake_up(&vhost->work_wait_q);
3689 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3690 * @tgt: ibmvfc target struct
3692 * If an ADISC times out, send a cancel. If the cancel times
3693 * out, reset the CRQ. When the ADISC comes back as cancelled,
3694 * log back into the target.
3696 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3698 struct ibmvfc_host *vhost = tgt->vhost;
3699 struct ibmvfc_event *evt;
3700 struct ibmvfc_tmf *tmf;
3701 unsigned long flags;
3704 tgt_dbg(tgt, "ADISC timeout\n");
3705 spin_lock_irqsave(vhost->host->host_lock, flags);
3706 if (vhost->abort_threads >= disc_threads ||
3707 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3708 vhost->state != IBMVFC_INITIALIZING ||
3709 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3710 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3714 vhost->abort_threads++;
3715 kref_get(&tgt->kref);
3716 evt = ibmvfc_get_event(vhost);
3717 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3721 memset(tmf, 0, sizeof(*tmf));
3722 tmf->common.version = cpu_to_be32(1);
3723 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3724 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3725 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3726 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
3728 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3731 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3732 vhost->abort_threads--;
3733 kref_put(&tgt->kref, ibmvfc_release_tgt);
3734 __ibmvfc_reset_host(vhost);
3736 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3737 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3741 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3742 * @tgt: ibmvfc target struct
3744 * When sending an ADISC we end up with two timers running. The
3745 * first timer is the timer in the ibmvfc target struct. If this
3746 * fires, we send a cancel to the target. The second timer is the
3747 * timer on the ibmvfc event for the ADISC, which is longer. If that
3748 * fires, it means the ADISC timed out and our attempt to cancel it
3749 * also failed, so we need to reset the CRQ.
3751 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3753 struct ibmvfc_passthru_mad *mad;
3754 struct ibmvfc_host *vhost = tgt->vhost;
3755 struct ibmvfc_event *evt;
3757 if (vhost->discovery_threads >= disc_threads)
3760 kref_get(&tgt->kref);
3761 evt = ibmvfc_get_event(vhost);
3762 vhost->discovery_threads++;
3763 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3766 ibmvfc_init_passthru(evt);
3767 mad = &evt->iu.passthru;
3768 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3769 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3770 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
3772 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
3773 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3774 sizeof(vhost->login_buf->resp.port_name));
3775 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3776 sizeof(vhost->login_buf->resp.node_name));
3777 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
3779 if (timer_pending(&tgt->timer))
3780 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3782 tgt->timer.data = (unsigned long) tgt;
3783 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3784 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3785 add_timer(&tgt->timer);
3788 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3789 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3790 vhost->discovery_threads--;
3791 del_timer(&tgt->timer);
3792 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3793 kref_put(&tgt->kref, ibmvfc_release_tgt);
3795 tgt_dbg(tgt, "Sent ADISC\n");
3799 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3800 * @evt: ibmvfc event struct
3803 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3805 struct ibmvfc_target *tgt = evt->tgt;
3806 struct ibmvfc_host *vhost = evt->vhost;
3807 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3808 u32 status = be16_to_cpu(rsp->common.status);
3809 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3811 vhost->discovery_threads--;
3812 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3814 case IBMVFC_MAD_SUCCESS:
3815 tgt_dbg(tgt, "Query Target succeeded\n");
3816 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3817 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
3818 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3820 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3822 case IBMVFC_MAD_DRIVER_FAILED:
3824 case IBMVFC_MAD_CRQ_ERROR:
3825 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3827 case IBMVFC_MAD_FAILED:
3829 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3830 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3831 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
3832 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3833 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3834 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3836 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3838 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3839 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3840 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)),
3841 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)),
3842 rsp->fc_explain, status);
3846 kref_put(&tgt->kref, ibmvfc_release_tgt);
3847 ibmvfc_free_event(evt);
3848 wake_up(&vhost->work_wait_q);
3852 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3853 * @tgt: ibmvfc target struct
3856 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3858 struct ibmvfc_query_tgt *query_tgt;
3859 struct ibmvfc_host *vhost = tgt->vhost;
3860 struct ibmvfc_event *evt;
3862 if (vhost->discovery_threads >= disc_threads)
3865 kref_get(&tgt->kref);
3866 evt = ibmvfc_get_event(vhost);
3867 vhost->discovery_threads++;
3869 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3870 query_tgt = &evt->iu.query_tgt;
3871 memset(query_tgt, 0, sizeof(*query_tgt));
3872 query_tgt->common.version = cpu_to_be32(1);
3873 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3874 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3875 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
3877 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3878 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3879 vhost->discovery_threads--;
3880 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3881 kref_put(&tgt->kref, ibmvfc_release_tgt);
3883 tgt_dbg(tgt, "Sent Query Target\n");
3887 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3888 * @vhost: ibmvfc host struct
3889 * @scsi_id: SCSI ID to allocate target for
3892 * 0 on success / other on failure
3894 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3896 struct ibmvfc_target *tgt;
3897 unsigned long flags;
3899 spin_lock_irqsave(vhost->host->host_lock, flags);
3900 list_for_each_entry(tgt, &vhost->targets, queue) {
3901 if (tgt->scsi_id == scsi_id) {
3902 if (tgt->need_login)
3903 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3907 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3909 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3911 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
3916 memset(tgt, 0, sizeof(*tgt));
3917 tgt->scsi_id = scsi_id;
3918 tgt->new_scsi_id = scsi_id;
3920 tgt->need_login = 1;
3921 tgt->cancel_key = vhost->task_set++;
3922 init_timer(&tgt->timer);
3923 kref_init(&tgt->kref);
3924 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3925 spin_lock_irqsave(vhost->host->host_lock, flags);
3926 list_add_tail(&tgt->queue, &vhost->targets);
3929 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3934 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3935 * @vhost: ibmvfc host struct
3938 * 0 on success / other on failure
3940 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3944 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3945 rc = ibmvfc_alloc_target(vhost,
3946 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3947 IBMVFC_DISC_TGT_SCSI_ID_MASK);
3953 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3954 * @evt: ibmvfc event struct
3957 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3959 struct ibmvfc_host *vhost = evt->vhost;
3960 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3961 u32 mad_status = be16_to_cpu(rsp->common.status);
3962 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3964 switch (mad_status) {
3965 case IBMVFC_MAD_SUCCESS:
3966 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3967 vhost->num_targets = be32_to_cpu(rsp->num_written);
3968 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3970 case IBMVFC_MAD_FAILED:
3971 level += ibmvfc_retry_host_init(vhost);
3972 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3973 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3974 rsp->status, rsp->error);
3976 case IBMVFC_MAD_DRIVER_FAILED:
3979 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3980 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3984 ibmvfc_free_event(evt);
3985 wake_up(&vhost->work_wait_q);
3989 * ibmvfc_discover_targets - Send Discover Targets MAD
3990 * @vhost: ibmvfc host struct
3993 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3995 struct ibmvfc_discover_targets *mad;
3996 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3998 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3999 mad = &evt->iu.discover_targets;
4000 memset(mad, 0, sizeof(*mad));
4001 mad->common.version = cpu_to_be32(1);
4002 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
4003 mad->common.length = cpu_to_be16(sizeof(*mad));
4004 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
4005 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
4006 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
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 discover targets\n");
4012 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4016 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4017 * @evt: ibmvfc event struct
4020 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4022 struct ibmvfc_host *vhost = evt->vhost;
4023 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
4024 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4025 unsigned int npiv_max_sectors;
4026 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4028 switch (mad_status) {
4029 case IBMVFC_MAD_SUCCESS:
4030 ibmvfc_free_event(evt);
4032 case IBMVFC_MAD_FAILED:
4033 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4034 level += ibmvfc_retry_host_init(vhost);
4036 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4037 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
4038 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4039 rsp->status, rsp->error);
4040 ibmvfc_free_event(evt);
4042 case IBMVFC_MAD_CRQ_ERROR:
4043 ibmvfc_retry_host_init(vhost);
4044 case IBMVFC_MAD_DRIVER_FAILED:
4045 ibmvfc_free_event(evt);
4048 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4049 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4050 ibmvfc_free_event(evt);
4054 vhost->client_migrated = 0;
4056 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
4057 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4059 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4060 wake_up(&vhost->work_wait_q);
4064 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
4065 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4067 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4068 wake_up(&vhost->work_wait_q);
4072 vhost->logged_in = 1;
4073 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
4074 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4075 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4076 rsp->drc_name, npiv_max_sectors);
4078 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4079 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4080 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4081 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
4082 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4083 fc_host_supported_classes(vhost->host) = 0;
4084 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
4085 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
4086 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
4087 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
4088 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
4089 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4090 fc_host_maxframe_size(vhost->host) =
4091 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
4093 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
4094 vhost->host->max_sectors = npiv_max_sectors;
4095 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4096 wake_up(&vhost->work_wait_q);
4100 * ibmvfc_npiv_login - Sends NPIV login
4101 * @vhost: ibmvfc host struct
4104 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4106 struct ibmvfc_npiv_login_mad *mad;
4107 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4109 ibmvfc_gather_partition_info(vhost);
4110 ibmvfc_set_login_info(vhost);
4111 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4113 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4114 mad = &evt->iu.npiv_login;
4115 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
4116 mad->common.version = cpu_to_be32(1);
4117 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4118 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4119 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4120 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
4122 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4124 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4125 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4127 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4131 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4132 * @vhost: ibmvfc host struct
4135 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4137 struct ibmvfc_host *vhost = evt->vhost;
4138 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
4140 ibmvfc_free_event(evt);
4142 switch (mad_status) {
4143 case IBMVFC_MAD_SUCCESS:
4144 if (list_empty(&vhost->sent) &&
4145 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
4146 ibmvfc_init_host(vhost);
4150 case IBMVFC_MAD_FAILED:
4151 case IBMVFC_MAD_NOT_SUPPORTED:
4152 case IBMVFC_MAD_CRQ_ERROR:
4153 case IBMVFC_MAD_DRIVER_FAILED:
4155 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4159 ibmvfc_hard_reset_host(vhost);
4163 * ibmvfc_npiv_logout - Issue an NPIV Logout
4164 * @vhost: ibmvfc host struct
4167 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4169 struct ibmvfc_npiv_logout_mad *mad;
4170 struct ibmvfc_event *evt;
4172 evt = ibmvfc_get_event(vhost);
4173 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4175 mad = &evt->iu.npiv_logout;
4176 memset(mad, 0, sizeof(*mad));
4177 mad->common.version = cpu_to_be32(1);
4178 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4179 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
4181 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4183 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4184 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4186 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4190 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4191 * @vhost: ibmvfc host struct
4194 * 1 if work to do / 0 if not
4196 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4198 struct ibmvfc_target *tgt;
4200 list_for_each_entry(tgt, &vhost->targets, queue) {
4201 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4202 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4210 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4211 * @vhost: ibmvfc host struct
4214 * 1 if work to do / 0 if not
4216 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4218 struct ibmvfc_target *tgt;
4220 if (kthread_should_stop())
4222 switch (vhost->action) {
4223 case IBMVFC_HOST_ACTION_NONE:
4224 case IBMVFC_HOST_ACTION_INIT_WAIT:
4225 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4227 case IBMVFC_HOST_ACTION_TGT_INIT:
4228 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4229 if (vhost->discovery_threads == disc_threads)
4231 list_for_each_entry(tgt, &vhost->targets, queue)
4232 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4234 list_for_each_entry(tgt, &vhost->targets, queue)
4235 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4238 case IBMVFC_HOST_ACTION_LOGO:
4239 case IBMVFC_HOST_ACTION_INIT:
4240 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4241 case IBMVFC_HOST_ACTION_TGT_DEL:
4242 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4243 case IBMVFC_HOST_ACTION_QUERY:
4244 case IBMVFC_HOST_ACTION_RESET:
4245 case IBMVFC_HOST_ACTION_REENABLE:
4254 * ibmvfc_work_to_do - Is there task level work to do?
4255 * @vhost: ibmvfc host struct
4258 * 1 if work to do / 0 if not
4260 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4262 unsigned long flags;
4265 spin_lock_irqsave(vhost->host->host_lock, flags);
4266 rc = __ibmvfc_work_to_do(vhost);
4267 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4272 * ibmvfc_log_ae - Log async events if necessary
4273 * @vhost: ibmvfc host struct
4274 * @events: events to log
4277 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4279 if (events & IBMVFC_AE_RSCN)
4280 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4281 if ((events & IBMVFC_AE_LINKDOWN) &&
4282 vhost->state >= IBMVFC_HALTED)
4283 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4284 if ((events & IBMVFC_AE_LINKUP) &&
4285 vhost->state == IBMVFC_INITIALIZING)
4286 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4290 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4291 * @tgt: ibmvfc target struct
4294 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4296 struct ibmvfc_host *vhost = tgt->vhost;
4297 struct fc_rport *rport;
4298 unsigned long flags;
4300 tgt_dbg(tgt, "Adding rport\n");
4301 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4302 spin_lock_irqsave(vhost->host->host_lock, flags);
4304 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4305 tgt_dbg(tgt, "Deleting rport\n");
4306 list_del(&tgt->queue);
4307 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4308 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4309 fc_remote_port_delete(rport);
4310 del_timer_sync(&tgt->timer);
4311 kref_put(&tgt->kref, ibmvfc_release_tgt);
4313 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4314 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4319 tgt_dbg(tgt, "rport add succeeded\n");
4321 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
4322 rport->supported_classes = 0;
4323 tgt->target_id = rport->scsi_target_id;
4324 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
4325 rport->supported_classes |= FC_COS_CLASS1;
4326 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
4327 rport->supported_classes |= FC_COS_CLASS2;
4328 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
4329 rport->supported_classes |= FC_COS_CLASS3;
4331 blk_queue_max_segments(rport->rqst_q, 1);
4333 tgt_dbg(tgt, "rport add failed\n");
4334 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4338 * ibmvfc_do_work - Do task level work
4339 * @vhost: ibmvfc host struct
4342 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4344 struct ibmvfc_target *tgt;
4345 unsigned long flags;
4346 struct fc_rport *rport;
4349 ibmvfc_log_ae(vhost, vhost->events_to_log);
4350 spin_lock_irqsave(vhost->host->host_lock, flags);
4351 vhost->events_to_log = 0;
4352 switch (vhost->action) {
4353 case IBMVFC_HOST_ACTION_NONE:
4354 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4355 case IBMVFC_HOST_ACTION_INIT_WAIT:
4357 case IBMVFC_HOST_ACTION_RESET:
4358 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4359 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4360 rc = ibmvfc_reset_crq(vhost);
4361 spin_lock_irqsave(vhost->host->host_lock, flags);
4363 vio_enable_interrupts(to_vio_dev(vhost->dev));
4364 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4365 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
4366 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4367 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4370 case IBMVFC_HOST_ACTION_REENABLE:
4371 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4372 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4373 rc = ibmvfc_reenable_crq_queue(vhost);
4374 spin_lock_irqsave(vhost->host->host_lock, flags);
4375 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4376 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4377 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4380 case IBMVFC_HOST_ACTION_LOGO:
4381 vhost->job_step(vhost);
4383 case IBMVFC_HOST_ACTION_INIT:
4384 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
4385 if (vhost->delay_init) {
4386 vhost->delay_init = 0;
4387 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4391 vhost->job_step(vhost);
4393 case IBMVFC_HOST_ACTION_QUERY:
4394 list_for_each_entry(tgt, &vhost->targets, queue)
4395 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4396 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4398 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4399 list_for_each_entry(tgt, &vhost->targets, queue) {
4400 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4406 if (!ibmvfc_dev_init_to_do(vhost))
4407 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4409 case IBMVFC_HOST_ACTION_TGT_DEL:
4410 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4411 list_for_each_entry(tgt, &vhost->targets, queue) {
4412 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4413 tgt_dbg(tgt, "Deleting rport\n");
4416 list_del(&tgt->queue);
4417 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4418 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4420 fc_remote_port_delete(rport);
4421 del_timer_sync(&tgt->timer);
4422 kref_put(&tgt->kref, ibmvfc_release_tgt);
4427 if (vhost->state == IBMVFC_INITIALIZING) {
4428 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
4429 if (vhost->reinit) {
4431 scsi_block_requests(vhost->host);
4432 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4433 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4435 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4436 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4437 wake_up(&vhost->init_wait_q);
4438 schedule_work(&vhost->rport_add_work_q);
4439 vhost->init_retries = 0;
4440 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4441 scsi_unblock_requests(vhost->host);
4446 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4447 vhost->job_step = ibmvfc_discover_targets;
4450 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4451 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4452 scsi_unblock_requests(vhost->host);
4453 wake_up(&vhost->init_wait_q);
4457 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4458 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4459 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4460 ibmvfc_alloc_targets(vhost);
4461 spin_lock_irqsave(vhost->host->host_lock, flags);
4463 case IBMVFC_HOST_ACTION_TGT_INIT:
4464 list_for_each_entry(tgt, &vhost->targets, queue) {
4465 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4471 if (!ibmvfc_dev_init_to_do(vhost))
4472 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4478 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4482 * ibmvfc_work - Do task level work
4483 * @data: ibmvfc host struct
4488 static int ibmvfc_work(void *data)
4490 struct ibmvfc_host *vhost = data;
4493 set_user_nice(current, MIN_NICE);
4496 rc = wait_event_interruptible(vhost->work_wait_q,
4497 ibmvfc_work_to_do(vhost));
4501 if (kthread_should_stop())
4504 ibmvfc_do_work(vhost);
4507 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4512 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4513 * @vhost: ibmvfc host struct
4515 * Allocates a page for messages, maps it for dma, and registers
4516 * the crq with the hypervisor.
4519 * zero on success / other on failure
4521 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4523 int rc, retrc = -ENOMEM;
4524 struct device *dev = vhost->dev;
4525 struct vio_dev *vdev = to_vio_dev(dev);
4526 struct ibmvfc_crq_queue *crq = &vhost->crq;
4529 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4534 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4535 crq->msg_token = dma_map_single(dev, crq->msgs,
4536 PAGE_SIZE, DMA_BIDIRECTIONAL);
4538 if (dma_mapping_error(dev, crq->msg_token))
4541 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4542 crq->msg_token, PAGE_SIZE);
4544 if (rc == H_RESOURCE)
4545 /* maybe kexecing and resource is busy. try a reset */
4546 retrc = rc = ibmvfc_reset_crq(vhost);
4549 dev_warn(dev, "Partner adapter not ready\n");
4551 dev_warn(dev, "Error %d opening adapter\n", rc);
4552 goto reg_crq_failed;
4557 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4559 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4560 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4561 goto req_irq_failed;
4564 if ((rc = vio_enable_interrupts(vdev))) {
4565 dev_err(dev, "Error %d enabling interrupts\n", rc);
4566 goto req_irq_failed;
4574 tasklet_kill(&vhost->tasklet);
4576 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4577 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4579 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4581 free_page((unsigned long)crq->msgs);
4586 * ibmvfc_free_mem - Free memory for vhost
4587 * @vhost: ibmvfc host struct
4592 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4594 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4597 mempool_destroy(vhost->tgt_pool);
4598 kfree(vhost->trace);
4599 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4600 vhost->disc_buf_dma);
4601 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4602 vhost->login_buf, vhost->login_buf_dma);
4603 dma_pool_destroy(vhost->sg_pool);
4604 dma_unmap_single(vhost->dev, async_q->msg_token,
4605 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4606 free_page((unsigned long)async_q->msgs);
4611 * ibmvfc_alloc_mem - Allocate memory for vhost
4612 * @vhost: ibmvfc host struct
4615 * 0 on success / non-zero on failure
4617 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4619 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4620 struct device *dev = vhost->dev;
4623 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4624 if (!async_q->msgs) {
4625 dev_err(dev, "Couldn't allocate async queue.\n");
4629 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4630 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4631 async_q->size * sizeof(*async_q->msgs),
4634 if (dma_mapping_error(dev, async_q->msg_token)) {
4635 dev_err(dev, "Failed to map async queue\n");
4636 goto free_async_crq;
4639 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4640 SG_ALL * sizeof(struct srp_direct_buf),
4641 sizeof(struct srp_direct_buf), 0);
4643 if (!vhost->sg_pool) {
4644 dev_err(dev, "Failed to allocate sg pool\n");
4645 goto unmap_async_crq;
4648 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4649 &vhost->login_buf_dma, GFP_KERNEL);
4651 if (!vhost->login_buf) {
4652 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4656 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4657 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4658 &vhost->disc_buf_dma, GFP_KERNEL);
4660 if (!vhost->disc_buf) {
4661 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4662 goto free_login_buffer;
4665 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4666 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4669 goto free_disc_buffer;
4671 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4672 sizeof(struct ibmvfc_target));
4674 if (!vhost->tgt_pool) {
4675 dev_err(dev, "Couldn't allocate target memory pool\n");
4683 kfree(vhost->trace);
4685 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4686 vhost->disc_buf_dma);
4688 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4689 vhost->login_buf, vhost->login_buf_dma);
4691 dma_pool_destroy(vhost->sg_pool);
4693 dma_unmap_single(dev, async_q->msg_token,
4694 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4696 free_page((unsigned long)async_q->msgs);
4703 * ibmvfc_rport_add_thread - Worker thread for rport adds
4704 * @work: work struct
4707 static void ibmvfc_rport_add_thread(struct work_struct *work)
4709 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4711 struct ibmvfc_target *tgt;
4712 struct fc_rport *rport;
4713 unsigned long flags;
4717 spin_lock_irqsave(vhost->host->host_lock, flags);
4720 if (vhost->state != IBMVFC_ACTIVE)
4723 list_for_each_entry(tgt, &vhost->targets, queue) {
4724 if (tgt->add_rport) {
4727 kref_get(&tgt->kref);
4730 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4731 ibmvfc_tgt_add_rport(tgt);
4732 } else if (get_device(&rport->dev)) {
4733 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4734 tgt_dbg(tgt, "Setting rport roles\n");
4735 fc_remote_port_rolechg(rport, tgt->ids.roles);
4736 put_device(&rport->dev);
4738 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4741 kref_put(&tgt->kref, ibmvfc_release_tgt);
4742 spin_lock_irqsave(vhost->host->host_lock, flags);
4748 if (vhost->state == IBMVFC_ACTIVE)
4749 vhost->scan_complete = 1;
4750 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4755 * ibmvfc_probe - Adapter hot plug add entry point
4756 * @vdev: vio device struct
4757 * @id: vio device id struct
4760 * 0 on success / non-zero on failure
4762 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4764 struct ibmvfc_host *vhost;
4765 struct Scsi_Host *shost;
4766 struct device *dev = &vdev->dev;
4770 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4772 dev_err(dev, "Couldn't allocate host data\n");
4776 shost->transportt = ibmvfc_transport_template;
4777 shost->can_queue = max_requests;
4778 shost->max_lun = max_lun;
4779 shost->max_id = max_targets;
4780 shost->max_sectors = IBMVFC_MAX_SECTORS;
4781 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4782 shost->unique_id = shost->host_no;
4784 vhost = shost_priv(shost);
4785 INIT_LIST_HEAD(&vhost->sent);
4786 INIT_LIST_HEAD(&vhost->free);
4787 INIT_LIST_HEAD(&vhost->targets);
4788 sprintf(vhost->name, IBMVFC_NAME);
4789 vhost->host = shost;
4791 vhost->partition_number = -1;
4792 vhost->log_level = log_level;
4793 vhost->task_set = 1;
4794 strcpy(vhost->partition_name, "UNKNOWN");
4795 init_waitqueue_head(&vhost->work_wait_q);
4796 init_waitqueue_head(&vhost->init_wait_q);
4797 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4798 mutex_init(&vhost->passthru_mutex);
4800 if ((rc = ibmvfc_alloc_mem(vhost)))
4801 goto free_scsi_host;
4803 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4806 if (IS_ERR(vhost->work_thread)) {
4807 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4808 PTR_ERR(vhost->work_thread));
4809 rc = PTR_ERR(vhost->work_thread);
4813 if ((rc = ibmvfc_init_crq(vhost))) {
4814 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4818 if ((rc = ibmvfc_init_event_pool(vhost))) {
4819 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4823 if ((rc = scsi_add_host(shost, dev)))
4824 goto release_event_pool;
4826 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4828 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4829 &ibmvfc_trace_attr))) {
4830 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4834 if (shost_to_fc_host(shost)->rqst_q)
4835 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
4836 dev_set_drvdata(dev, vhost);
4837 spin_lock(&ibmvfc_driver_lock);
4838 list_add_tail(&vhost->queue, &ibmvfc_head);
4839 spin_unlock(&ibmvfc_driver_lock);
4841 ibmvfc_send_crq_init(vhost);
4842 scsi_scan_host(shost);
4846 scsi_remove_host(shost);
4848 ibmvfc_free_event_pool(vhost);
4850 ibmvfc_release_crq_queue(vhost);
4852 kthread_stop(vhost->work_thread);
4854 ibmvfc_free_mem(vhost);
4856 scsi_host_put(shost);
4863 * ibmvfc_remove - Adapter hot plug remove entry point
4864 * @vdev: vio device struct
4869 static int ibmvfc_remove(struct vio_dev *vdev)
4871 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4872 unsigned long flags;
4875 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4877 spin_lock_irqsave(vhost->host->host_lock, flags);
4878 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4879 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4881 ibmvfc_wait_while_resetting(vhost);
4882 ibmvfc_release_crq_queue(vhost);
4883 kthread_stop(vhost->work_thread);
4884 fc_remove_host(vhost->host);
4885 scsi_remove_host(vhost->host);
4887 spin_lock_irqsave(vhost->host->host_lock, flags);
4888 ibmvfc_purge_requests(vhost, DID_ERROR);
4889 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4890 ibmvfc_free_event_pool(vhost);
4892 ibmvfc_free_mem(vhost);
4893 spin_lock(&ibmvfc_driver_lock);
4894 list_del(&vhost->queue);
4895 spin_unlock(&ibmvfc_driver_lock);
4896 scsi_host_put(vhost->host);
4902 * ibmvfc_resume - Resume from suspend
4903 * @dev: device struct
4905 * We may have lost an interrupt across suspend/resume, so kick the
4909 static int ibmvfc_resume(struct device *dev)
4911 unsigned long flags;
4912 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4913 struct vio_dev *vdev = to_vio_dev(dev);
4915 spin_lock_irqsave(vhost->host->host_lock, flags);
4916 vio_disable_interrupts(vdev);
4917 tasklet_schedule(&vhost->tasklet);
4918 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4923 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4924 * @vdev: vio device struct
4927 * Number of bytes the driver will need to DMA map at the same time in
4928 * order to perform well.
4930 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4932 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4933 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4936 static struct vio_device_id ibmvfc_device_table[] = {
4937 {"fcp", "IBM,vfc-client"},
4940 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4942 static struct dev_pm_ops ibmvfc_pm_ops = {
4943 .resume = ibmvfc_resume
4946 static struct vio_driver ibmvfc_driver = {
4947 .id_table = ibmvfc_device_table,
4948 .probe = ibmvfc_probe,
4949 .remove = ibmvfc_remove,
4950 .get_desired_dma = ibmvfc_get_desired_dma,
4951 .name = IBMVFC_NAME,
4952 .pm = &ibmvfc_pm_ops,
4955 static struct fc_function_template ibmvfc_transport_functions = {
4956 .show_host_fabric_name = 1,
4957 .show_host_node_name = 1,
4958 .show_host_port_name = 1,
4959 .show_host_supported_classes = 1,
4960 .show_host_port_type = 1,
4961 .show_host_port_id = 1,
4962 .show_host_maxframe_size = 1,
4964 .get_host_port_state = ibmvfc_get_host_port_state,
4965 .show_host_port_state = 1,
4967 .get_host_speed = ibmvfc_get_host_speed,
4968 .show_host_speed = 1,
4970 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4971 .terminate_rport_io = ibmvfc_terminate_rport_io,
4973 .show_rport_maxframe_size = 1,
4974 .show_rport_supported_classes = 1,
4976 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4977 .show_rport_dev_loss_tmo = 1,
4979 .get_starget_node_name = ibmvfc_get_starget_node_name,
4980 .show_starget_node_name = 1,
4982 .get_starget_port_name = ibmvfc_get_starget_port_name,
4983 .show_starget_port_name = 1,
4985 .get_starget_port_id = ibmvfc_get_starget_port_id,
4986 .show_starget_port_id = 1,
4988 .bsg_request = ibmvfc_bsg_request,
4989 .bsg_timeout = ibmvfc_bsg_timeout,
4993 * ibmvfc_module_init - Initialize the ibmvfc module
4996 * 0 on success / other on failure
4998 static int __init ibmvfc_module_init(void)
5002 if (!firmware_has_feature(FW_FEATURE_VIO))
5005 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
5006 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
5008 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
5009 if (!ibmvfc_transport_template)
5012 rc = vio_register_driver(&ibmvfc_driver);
5014 fc_release_transport(ibmvfc_transport_template);
5019 * ibmvfc_module_exit - Teardown the ibmvfc module
5024 static void __exit ibmvfc_module_exit(void)
5026 vio_unregister_driver(&ibmvfc_driver);
5027 fc_release_transport(ibmvfc_transport_template);
5030 module_init(ibmvfc_module_init);
5031 module_exit(ibmvfc_module_exit);