2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
34 #include <linux/stringify.h>
35 #include <asm/firmware.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_tcq.h>
43 #include <scsi/scsi_transport_fc.h>
44 #include <scsi/scsi_bsg_fc.h>
47 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
48 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
49 static unsigned int max_lun = IBMVFC_MAX_LUN;
50 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
51 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
52 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
53 static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
54 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
55 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
56 static LIST_HEAD(ibmvfc_head);
57 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
58 static struct scsi_transport_template *ibmvfc_transport_template;
60 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
61 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
62 MODULE_LICENSE("GPL");
63 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
65 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
66 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
68 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
69 MODULE_PARM_DESC(default_timeout,
70 "Default timeout in seconds for initialization and EH commands. "
71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
72 module_param_named(max_requests, max_requests, uint, S_IRUGO);
73 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
75 module_param_named(max_lun, max_lun, uint, S_IRUGO);
76 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
77 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
78 module_param_named(max_targets, max_targets, uint, S_IRUGO);
79 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
80 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
81 module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
82 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
84 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
85 MODULE_PARM_DESC(debug, "Enable driver debug information. "
86 "[Default=" __stringify(IBMVFC_DEBUG) "]");
87 module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
88 MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
89 "transport should insulate the loss of a remote port. Once this "
90 "value is exceeded, the scsi target is removed. "
91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
92 module_param_named(log_level, log_level, uint, 0);
93 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
116 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
117 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
125 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
126 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
127 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
128 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
133 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
134 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
135 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
136 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
138 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
139 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
140 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
142 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
145 static void ibmvfc_npiv_login(struct ibmvfc_host *);
146 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
147 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
148 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
149 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
151 static const char *unknown_error = "unknown error";
153 #ifdef CONFIG_SCSI_IBMVFC_TRACE
155 * ibmvfc_trc_start - Log a start trace entry
156 * @evt: ibmvfc event struct
159 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
161 struct ibmvfc_host *vhost = evt->vhost;
162 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
163 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
164 struct ibmvfc_trace_entry *entry;
166 entry = &vhost->trace[vhost->trace_index++];
168 entry->time = jiffies;
169 entry->fmt = evt->crq.format;
170 entry->type = IBMVFC_TRC_START;
172 switch (entry->fmt) {
173 case IBMVFC_CMD_FORMAT:
174 entry->op_code = vfc_cmd->iu.cdb[0];
175 entry->scsi_id = vfc_cmd->tgt_scsi_id;
176 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
177 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
178 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
180 case IBMVFC_MAD_FORMAT:
181 entry->op_code = mad->opcode;
189 * ibmvfc_trc_end - Log an end trace entry
190 * @evt: ibmvfc event struct
193 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
195 struct ibmvfc_host *vhost = evt->vhost;
196 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
197 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
198 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
201 entry->time = jiffies;
202 entry->fmt = evt->crq.format;
203 entry->type = IBMVFC_TRC_END;
205 switch (entry->fmt) {
206 case IBMVFC_CMD_FORMAT:
207 entry->op_code = vfc_cmd->iu.cdb[0];
208 entry->scsi_id = vfc_cmd->tgt_scsi_id;
209 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
210 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
211 entry->u.end.status = vfc_cmd->status;
212 entry->u.end.error = vfc_cmd->error;
213 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
214 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
215 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
217 case IBMVFC_MAD_FORMAT:
218 entry->op_code = mad->opcode;
219 entry->u.end.status = mad->status;
228 #define ibmvfc_trc_start(evt) do { } while (0)
229 #define ibmvfc_trc_end(evt) do { } while (0)
233 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
234 * @status: status / error class
238 * index into cmd_status / -EINVAL on failure
240 static int ibmvfc_get_err_index(u16 status, u16 error)
244 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
245 if ((cmd_status[i].status & status) == cmd_status[i].status &&
246 cmd_status[i].error == error)
253 * ibmvfc_get_cmd_error - Find the error description for the fcp response
254 * @status: status / error class
258 * error description string
260 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
262 int rc = ibmvfc_get_err_index(status, error);
264 return cmd_status[rc].name;
265 return unknown_error;
269 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
270 * @vfc_cmd: ibmvfc command struct
273 * SCSI result value to return for completed command
275 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
278 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
279 int fc_rsp_len = rsp->fcp_rsp_len;
281 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
282 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
283 rsp->data.info.rsp_code))
284 return DID_ERROR << 16;
286 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
288 return rsp->scsi_status | (cmd_status[err].result << 16);
289 return rsp->scsi_status | (DID_ERROR << 16);
293 * ibmvfc_retry_cmd - Determine if error status is retryable
294 * @status: status / error class
298 * 1 if error should be retried / 0 if it should not
300 static int ibmvfc_retry_cmd(u16 status, u16 error)
302 int rc = ibmvfc_get_err_index(status, error);
305 return cmd_status[rc].retry;
309 static const char *unknown_fc_explain = "unknown fc explain";
311 static const struct {
315 { 0x00, "no additional explanation" },
316 { 0x01, "service parameter error - options" },
317 { 0x03, "service parameter error - initiator control" },
318 { 0x05, "service parameter error - recipient control" },
319 { 0x07, "service parameter error - received data field size" },
320 { 0x09, "service parameter error - concurrent seq" },
321 { 0x0B, "service parameter error - credit" },
322 { 0x0D, "invalid N_Port/F_Port_Name" },
323 { 0x0E, "invalid node/Fabric Name" },
324 { 0x0F, "invalid common service parameters" },
325 { 0x11, "invalid association header" },
326 { 0x13, "association header required" },
327 { 0x15, "invalid originator S_ID" },
328 { 0x17, "invalid OX_ID-RX-ID combination" },
329 { 0x19, "command (request) already in progress" },
330 { 0x1E, "N_Port Login requested" },
331 { 0x1F, "Invalid N_Port_ID" },
334 static const struct {
338 { 0x00, "no additional explanation" },
339 { 0x01, "port identifier not registered" },
340 { 0x02, "port name not registered" },
341 { 0x03, "node name not registered" },
342 { 0x04, "class of service not registered" },
343 { 0x06, "initial process associator not registered" },
344 { 0x07, "FC-4 TYPEs not registered" },
345 { 0x08, "symbolic port name not registered" },
346 { 0x09, "symbolic node name not registered" },
347 { 0x0A, "port type not registered" },
348 { 0xF0, "authorization exception" },
349 { 0xF1, "authentication exception" },
350 { 0xF2, "data base full" },
351 { 0xF3, "data base empty" },
352 { 0xF4, "processing request" },
353 { 0xF5, "unable to verify connection" },
354 { 0xF6, "devices not in a common zone" },
358 * ibmvfc_get_ls_explain - Return the FC Explain description text
359 * @status: FC Explain status
364 static const char *ibmvfc_get_ls_explain(u16 status)
368 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
369 if (ls_explain[i].fc_explain == status)
370 return ls_explain[i].name;
372 return unknown_fc_explain;
376 * ibmvfc_get_gs_explain - Return the FC Explain description text
377 * @status: FC Explain status
382 static const char *ibmvfc_get_gs_explain(u16 status)
386 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
387 if (gs_explain[i].fc_explain == status)
388 return gs_explain[i].name;
390 return unknown_fc_explain;
393 static const struct {
394 enum ibmvfc_fc_type fc_type;
397 { IBMVFC_FABRIC_REJECT, "fabric reject" },
398 { IBMVFC_PORT_REJECT, "port reject" },
399 { IBMVFC_LS_REJECT, "ELS reject" },
400 { IBMVFC_FABRIC_BUSY, "fabric busy" },
401 { IBMVFC_PORT_BUSY, "port busy" },
402 { IBMVFC_BASIC_REJECT, "basic reject" },
405 static const char *unknown_fc_type = "unknown fc type";
408 * ibmvfc_get_fc_type - Return the FC Type description text
409 * @status: FC Type error status
414 static const char *ibmvfc_get_fc_type(u16 status)
418 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
419 if (fc_type[i].fc_type == status)
420 return fc_type[i].name;
422 return unknown_fc_type;
426 * ibmvfc_set_tgt_action - Set the next init action for the target
427 * @tgt: ibmvfc target struct
428 * @action: action to perform
431 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
432 enum ibmvfc_target_action action)
434 switch (tgt->action) {
435 case IBMVFC_TGT_ACTION_DEL_RPORT:
438 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
440 tgt->action = action;
446 * ibmvfc_set_host_state - Set the state for the host
447 * @vhost: ibmvfc host struct
448 * @state: state to set host to
451 * 0 if state changed / non-zero if not changed
453 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
454 enum ibmvfc_host_state state)
458 switch (vhost->state) {
459 case IBMVFC_HOST_OFFLINE:
463 vhost->state = state;
471 * ibmvfc_set_host_action - Set the next init action for the host
472 * @vhost: ibmvfc host struct
473 * @action: action to perform
476 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
477 enum ibmvfc_host_action action)
480 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
481 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
482 vhost->action = action;
484 case IBMVFC_HOST_ACTION_LOGO_WAIT:
485 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
486 vhost->action = action;
488 case IBMVFC_HOST_ACTION_INIT_WAIT:
489 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
490 vhost->action = action;
492 case IBMVFC_HOST_ACTION_QUERY:
493 switch (vhost->action) {
494 case IBMVFC_HOST_ACTION_INIT_WAIT:
495 case IBMVFC_HOST_ACTION_NONE:
496 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
497 vhost->action = action;
503 case IBMVFC_HOST_ACTION_TGT_INIT:
504 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
505 vhost->action = action;
507 case IBMVFC_HOST_ACTION_LOGO:
508 case IBMVFC_HOST_ACTION_INIT:
509 case IBMVFC_HOST_ACTION_TGT_DEL:
510 case IBMVFC_HOST_ACTION_QUERY_TGTS:
511 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
512 case IBMVFC_HOST_ACTION_NONE:
514 vhost->action = action;
520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
521 * @vhost: ibmvfc host struct
526 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
528 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
529 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
530 scsi_block_requests(vhost->host);
531 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
536 wake_up(&vhost->work_wait_q);
540 * ibmvfc_link_down - Handle a link down event from the adapter
541 * @vhost: ibmvfc host struct
542 * @state: ibmvfc host state to enter
545 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
546 enum ibmvfc_host_state state)
548 struct ibmvfc_target *tgt;
551 scsi_block_requests(vhost->host);
552 list_for_each_entry(tgt, &vhost->targets, queue)
553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
554 ibmvfc_set_host_state(vhost, state);
555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
556 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
557 wake_up(&vhost->work_wait_q);
562 * ibmvfc_init_host - Start host initialization
563 * @vhost: ibmvfc host struct
568 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
570 struct ibmvfc_target *tgt;
572 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
573 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
575 "Host initialization retries exceeded. Taking adapter offline\n");
576 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
581 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
582 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
583 vhost->async_crq.cur = 0;
585 list_for_each_entry(tgt, &vhost->targets, queue)
586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
587 scsi_block_requests(vhost->host);
588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
589 vhost->job_step = ibmvfc_npiv_login;
590 wake_up(&vhost->work_wait_q);
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
601 * 0 on success / other on failure
603 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
605 struct vio_dev *vdev = to_vio_dev(vhost->dev);
606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
614 * 0 on success / other on failure
616 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
618 ibmvfc_dbg(vhost, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
627 * 0 on success / other on failure
629 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
642 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
645 struct vio_dev *vdev = to_vio_dev(vhost->dev);
646 struct ibmvfc_crq_queue *crq = &vhost->crq;
648 ibmvfc_dbg(vhost, "Releasing CRQ\n");
649 free_irq(vdev->irq, vhost);
650 tasklet_kill(&vhost->tasklet);
652 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
653 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
655 vhost->state = IBMVFC_NO_CRQ;
656 vhost->logged_in = 0;
657 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
658 free_page((unsigned long)crq->msgs);
662 * ibmvfc_reenable_crq_queue - reenables the CRQ
663 * @vhost: ibmvfc host struct
666 * 0 on success / other on failure
668 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
671 struct vio_dev *vdev = to_vio_dev(vhost->dev);
673 /* Re-enable the CRQ */
675 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
676 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
679 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
685 * ibmvfc_reset_crq - resets a crq after a failure
686 * @vhost: ibmvfc host struct
689 * 0 on success / other on failure
691 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
694 struct vio_dev *vdev = to_vio_dev(vhost->dev);
695 struct ibmvfc_crq_queue *crq = &vhost->crq;
699 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
700 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
702 vhost->state = IBMVFC_NO_CRQ;
703 vhost->logged_in = 0;
704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
706 /* Clean out the queue */
707 memset(crq->msgs, 0, PAGE_SIZE);
710 /* And re-open it again */
711 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
712 crq->msg_token, PAGE_SIZE);
715 /* Adapter is good, but other end is not ready */
716 dev_warn(vhost->dev, "Partner adapter not ready\n");
718 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
724 * ibmvfc_valid_event - Determines if event is valid.
725 * @pool: event_pool that contains the event
726 * @evt: ibmvfc event to be checked for validity
729 * 1 if event is valid / 0 if event is not valid
731 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
732 struct ibmvfc_event *evt)
734 int index = evt - pool->events;
735 if (index < 0 || index >= pool->size) /* outside of bounds */
737 if (evt != pool->events + index) /* unaligned */
743 * ibmvfc_free_event - Free the specified event
744 * @evt: ibmvfc_event to be freed
747 static void ibmvfc_free_event(struct ibmvfc_event *evt)
749 struct ibmvfc_host *vhost = evt->vhost;
750 struct ibmvfc_event_pool *pool = &vhost->pool;
752 BUG_ON(!ibmvfc_valid_event(pool, evt));
753 BUG_ON(atomic_inc_return(&evt->free) != 1);
754 list_add_tail(&evt->queue, &vhost->free);
758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
759 * @evt: ibmvfc event struct
761 * This function does not setup any error status, that must be done
762 * before this function gets called.
764 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
766 struct scsi_cmnd *cmnd = evt->cmnd;
769 scsi_dma_unmap(cmnd);
770 cmnd->scsi_done(cmnd);
774 complete(evt->eh_comp);
776 ibmvfc_free_event(evt);
780 * ibmvfc_fail_request - Fail request with specified error code
781 * @evt: ibmvfc event struct
782 * @error_code: error code to fail request with
787 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
790 evt->cmnd->result = (error_code << 16);
791 evt->done = ibmvfc_scsi_eh_done;
793 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
795 list_del(&evt->queue);
796 del_timer(&evt->timer);
802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
803 * @vhost: ibmvfc host struct
804 * @error_code: error code to fail requests with
809 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
811 struct ibmvfc_event *evt, *pos;
813 ibmvfc_dbg(vhost, "Purging all requests\n");
814 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
815 ibmvfc_fail_request(evt, error_code);
819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
820 * @vhost: struct ibmvfc host to reset
822 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
826 scsi_block_requests(vhost->host);
827 ibmvfc_purge_requests(vhost, DID_ERROR);
828 if ((rc = ibmvfc_reset_crq(vhost)) ||
829 (rc = ibmvfc_send_crq_init(vhost)) ||
830 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
831 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
832 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
834 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
839 * @vhost: struct ibmvfc host to reset
841 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
845 scsi_block_requests(vhost->host);
846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
847 vhost->job_step = ibmvfc_npiv_logout;
848 wake_up(&vhost->work_wait_q);
850 ibmvfc_hard_reset_host(vhost);
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
857 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
861 spin_lock_irqsave(vhost->host->host_lock, flags);
862 __ibmvfc_reset_host(vhost);
863 spin_unlock_irqrestore(vhost->host->host_lock, flags);
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
870 * Returns: 1 if init will be retried / 0 if not
873 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
878 vhost->delay_init = 1;
879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
884 __ibmvfc_reset_host(vhost);
886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
891 wake_up(&vhost->work_wait_q);
896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
897 * @starget: scsi target struct
900 * ibmvfc_target struct / NULL if not found
902 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
905 struct ibmvfc_host *vhost = shost_priv(shost);
906 struct ibmvfc_target *tgt;
908 list_for_each_entry(tgt, &vhost->targets, queue)
909 if (tgt->target_id == starget->id) {
910 kref_get(&tgt->kref);
917 * ibmvfc_get_target - Find the specified scsi_target
918 * @starget: scsi target struct
921 * ibmvfc_target struct / NULL if not found
923 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
926 struct ibmvfc_target *tgt;
929 spin_lock_irqsave(shost->host_lock, flags);
930 tgt = __ibmvfc_get_target(starget);
931 spin_unlock_irqrestore(shost->host_lock, flags);
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
942 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
944 struct ibmvfc_host *vhost = shost_priv(shost);
947 spin_lock_irqsave(shost->host_lock, flags);
948 if (vhost->state == IBMVFC_ACTIVE) {
949 switch (vhost->login_buf->resp.link_speed / 100) {
951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
970 vhost->login_buf->resp.link_speed / 100);
971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
976 spin_unlock_irqrestore(shost->host_lock, flags);
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
986 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
988 struct ibmvfc_host *vhost = shost_priv(shost);
991 spin_lock_irqsave(shost->host_lock, flags);
992 switch (vhost->state) {
993 case IBMVFC_INITIALIZING:
995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
997 case IBMVFC_LINK_DOWN:
998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1000 case IBMVFC_LINK_DEAD:
1001 case IBMVFC_HOST_OFFLINE:
1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1015 spin_unlock_irqrestore(shost->host_lock, flags);
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1026 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1029 rport->dev_loss_tmo = timeout;
1031 rport->dev_loss_tmo = 1;
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1039 static void ibmvfc_release_tgt(struct kref *kref)
1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1052 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1057 kref_put(&tgt->kref, ibmvfc_release_tgt);
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1067 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1072 kref_put(&tgt->kref, ibmvfc_release_tgt);
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1082 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1087 kref_put(&tgt->kref, ibmvfc_release_tgt);
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1095 * 0 on success / other on failure
1097 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1099 long timeout = wait_event_timeout(vhost->init_wait_q,
1100 ((vhost->state == IBMVFC_ACTIVE ||
1101 vhost->state == IBMVFC_HOST_OFFLINE ||
1102 vhost->state == IBMVFC_LINK_DEAD) &&
1103 vhost->action == IBMVFC_HOST_ACTION_NONE),
1104 (init_timeout * HZ));
1106 return timeout ? 0 : -EIO;
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1114 * 0 on success / other on failure
1116 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1118 struct ibmvfc_host *vhost = shost_priv(shost);
1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost);
1122 return ibmvfc_wait_while_resetting(vhost);
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1131 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1133 struct device_node *rootdn;
1135 const unsigned int *num;
1137 rootdn = of_find_node_by_path("/");
1141 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1144 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1146 vhost->partition_number = *num;
1147 of_node_put(rootdn);
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1157 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1160 struct device_node *of_node = vhost->dev->archdata.of_node;
1161 const char *location;
1163 memset(login_info, 0, sizeof(*login_info));
1165 login_info->ostype = IBMVFC_OS_LINUX;
1166 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1167 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1168 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1169 login_info->partition_num = vhost->partition_number;
1170 login_info->vfc_frame_version = 1;
1171 login_info->fcp_version = 3;
1172 login_info->flags = IBMVFC_FLUSH_ON_HALT;
1173 if (vhost->client_migrated)
1174 login_info->flags |= IBMVFC_CLIENT_MIGRATED;
1176 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1177 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1178 login_info->async.va = vhost->async_crq.msg_token;
1179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1181 strncpy(login_info->device_name,
1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1184 location = of_get_property(of_node, "ibm,loc-code", NULL);
1185 location = location ? location : dev_name(vhost->dev);
1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1193 * Returns zero on success.
1195 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1198 struct ibmvfc_event_pool *pool = &vhost->pool;
1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1206 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1207 pool->size * sizeof(*pool->iu_storage),
1208 &pool->iu_token, 0);
1210 if (!pool->iu_storage) {
1211 kfree(pool->events);
1215 for (i = 0; i < pool->size; ++i) {
1216 struct ibmvfc_event *evt = &pool->events[i];
1217 atomic_set(&evt->free, 1);
1218 evt->crq.valid = 0x80;
1219 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1220 evt->xfer_iu = pool->iu_storage + i;
1222 evt->ext_list = NULL;
1223 list_add_tail(&evt->queue, &vhost->free);
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1235 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1238 struct ibmvfc_event_pool *pool = &vhost->pool;
1241 for (i = 0; i < pool->size; ++i) {
1242 list_del(&pool->events[i].queue);
1243 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1244 if (pool->events[i].ext_list)
1245 dma_pool_free(vhost->sg_pool,
1246 pool->events[i].ext_list,
1247 pool->events[i].ext_list_token);
1250 kfree(pool->events);
1251 dma_free_coherent(vhost->dev,
1252 pool->size * sizeof(*pool->iu_storage),
1253 pool->iu_storage, pool->iu_token);
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1261 * Returns a free event from the pool.
1263 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1265 struct ibmvfc_event *evt;
1267 BUG_ON(list_empty(&vhost->free));
1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1269 atomic_set(&evt->free, 0);
1270 list_del(&evt->queue);
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1281 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1282 void (*done) (struct ibmvfc_event *), u8 format)
1285 evt->sync_iu = NULL;
1286 evt->crq.format = format;
1288 evt->eh_comp = NULL;
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1297 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1298 struct srp_direct_buf *md)
1301 struct scatterlist *sg;
1303 scsi_for_each_sg(scmd, sg, nseg, i) {
1304 md[i].va = sg_dma_address(sg);
1305 md[i].len = sg_dma_len(sg);
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1312 * @scmd: Scsi_Cmnd with the scatterlist
1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1318 * 0 on success / non-zero on failure
1320 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1321 struct ibmvfc_event *evt,
1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1326 struct srp_direct_buf *data = &vfc_cmd->ioba;
1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1329 sg_mapped = scsi_dma_map(scmd);
1331 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1333 } else if (unlikely(sg_mapped < 0)) {
1334 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1335 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1339 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1340 vfc_cmd->flags |= IBMVFC_WRITE;
1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1343 vfc_cmd->flags |= IBMVFC_READ;
1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1347 if (sg_mapped == 1) {
1348 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1352 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1354 if (!evt->ext_list) {
1355 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1356 &evt->ext_list_token);
1358 if (!evt->ext_list) {
1359 scsi_dma_unmap(scmd);
1360 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1361 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1366 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1368 data->va = evt->ext_list_token;
1369 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1375 * ibmvfc_timeout - Internal command timeout handler
1376 * @evt: struct ibmvfc_event that timed out
1378 * Called when an internally generated command times out
1380 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1382 struct ibmvfc_host *vhost = evt->vhost;
1383 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1384 ibmvfc_reset_host(vhost);
1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1389 * @evt: event to be sent
1390 * @vhost: ibmvfc host struct
1391 * @timeout: timeout in seconds - 0 means do not time command
1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1395 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1396 struct ibmvfc_host *vhost, unsigned long timeout)
1398 u64 *crq_as_u64 = (u64 *) &evt->crq;
1401 /* Copy the IU into the transfer area */
1402 *evt->xfer_iu = evt->iu;
1403 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1404 evt->xfer_iu->cmd.tag = (u64)evt;
1405 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1406 evt->xfer_iu->mad_common.tag = (u64)evt;
1410 list_add_tail(&evt->queue, &vhost->sent);
1411 init_timer(&evt->timer);
1414 evt->timer.data = (unsigned long) evt;
1415 evt->timer.expires = jiffies + (timeout * HZ);
1416 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1417 add_timer(&evt->timer);
1422 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1423 list_del(&evt->queue);
1424 del_timer(&evt->timer);
1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1427 * Firmware will send a CRQ with a transport event (0xFF) to
1428 * tell this client what has happened to the transport. This
1429 * will be handled in ibmvfc_handle_crq()
1431 if (rc == H_CLOSED) {
1432 if (printk_ratelimit())
1433 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1435 scsi_dma_unmap(evt->cmnd);
1436 ibmvfc_free_event(evt);
1437 return SCSI_MLQUEUE_HOST_BUSY;
1440 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1442 evt->cmnd->result = DID_ERROR << 16;
1443 evt->done = ibmvfc_scsi_eh_done;
1445 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1449 ibmvfc_trc_start(evt);
1455 * ibmvfc_log_error - Log an error for the failed command if appropriate
1456 * @evt: ibmvfc event to log
1459 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1462 struct ibmvfc_host *vhost = evt->vhost;
1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1464 struct scsi_cmnd *cmnd = evt->cmnd;
1465 const char *err = unknown_error;
1466 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1471 logerr = cmd_status[index].log;
1472 err = cmd_status[index].name;
1475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1478 if (rsp->flags & FCP_RSP_LEN_VALID)
1479 rsp_code = rsp->data.info.rsp_code;
1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1488 * ibmvfc_relogin - Log back into the specified device
1489 * @sdev: scsi device struct
1492 static void ibmvfc_relogin(struct scsi_device *sdev)
1494 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1495 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1496 struct ibmvfc_target *tgt;
1498 list_for_each_entry(tgt, &vhost->targets, queue) {
1499 if (rport == tgt->rport) {
1500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1505 ibmvfc_reinit_host(vhost);
1509 * ibmvfc_scsi_done - Handle responses from commands
1510 * @evt: ibmvfc event to be handled
1512 * Used as a callback when sending scsi cmds.
1514 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1516 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1517 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1518 struct scsi_cmnd *cmnd = evt->cmnd;
1520 u32 sense_len = rsp->fcp_sense_len;
1523 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1524 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1525 else if (rsp->flags & FCP_RESID_UNDER)
1526 scsi_set_resid(cmnd, rsp->fcp_resid);
1528 scsi_set_resid(cmnd, 0);
1530 if (vfc_cmd->status) {
1531 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1533 if (rsp->flags & FCP_RSP_LEN_VALID)
1534 rsp_len = rsp->fcp_rsp_len;
1535 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1536 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1537 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1538 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1539 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
1540 ibmvfc_relogin(cmnd->device);
1542 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1543 cmnd->result = (DID_ERROR << 16);
1545 ibmvfc_log_error(evt);
1548 if (!cmnd->result &&
1549 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1550 cmnd->result = (DID_ERROR << 16);
1552 scsi_dma_unmap(cmnd);
1553 cmnd->scsi_done(cmnd);
1557 complete(evt->eh_comp);
1559 ibmvfc_free_event(evt);
1563 * ibmvfc_host_chkready - Check if the host can accept commands
1564 * @vhost: struct ibmvfc host
1567 * 1 if host can accept command / 0 if not
1569 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1573 switch (vhost->state) {
1574 case IBMVFC_LINK_DEAD:
1575 case IBMVFC_HOST_OFFLINE:
1576 result = DID_NO_CONNECT << 16;
1579 case IBMVFC_INITIALIZING:
1581 case IBMVFC_LINK_DOWN:
1582 result = DID_REQUEUE << 16;
1593 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1594 * @cmnd: struct scsi_cmnd to be executed
1595 * @done: Callback function to be called when cmnd is completed
1598 * 0 on success / other on failure
1600 static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1601 void (*done) (struct scsi_cmnd *))
1603 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1604 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1605 struct ibmvfc_cmd *vfc_cmd;
1606 struct ibmvfc_event *evt;
1610 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1611 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1617 cmnd->result = (DID_OK << 16);
1618 evt = ibmvfc_get_event(vhost);
1619 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1621 cmnd->scsi_done = done;
1622 vfc_cmd = &evt->iu.cmd;
1623 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1624 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1625 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1626 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1627 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1628 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1629 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1630 vfc_cmd->tgt_scsi_id = rport->port_id;
1631 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1632 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1633 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1635 if (scsi_populate_tag_msg(cmnd, tag)) {
1636 vfc_cmd->task_tag = tag[1];
1638 case MSG_SIMPLE_TAG:
1639 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1642 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1644 case MSG_ORDERED_TAG:
1645 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1650 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1651 return ibmvfc_send_event(evt, vhost, 0);
1653 ibmvfc_free_event(evt);
1655 return SCSI_MLQUEUE_HOST_BUSY;
1657 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1658 scmd_printk(KERN_ERR, cmnd,
1659 "Failed to map DMA buffer for command. rc=%d\n", rc);
1661 cmnd->result = DID_ERROR << 16;
1667 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1668 * @evt: ibmvfc event struct
1671 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1673 /* copy the response back */
1675 *evt->sync_iu = *evt->xfer_iu;
1677 complete(&evt->comp);
1681 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1682 * @evt: struct ibmvfc_event
1685 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1687 struct ibmvfc_host *vhost = evt->vhost;
1689 ibmvfc_free_event(evt);
1690 vhost->aborting_passthru = 0;
1691 dev_info(vhost->dev, "Passthru command cancelled\n");
1695 * ibmvfc_bsg_timeout - Handle a BSG timeout
1696 * @job: struct fc_bsg_job that timed out
1699 * 0 on success / other on failure
1701 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
1703 struct ibmvfc_host *vhost = shost_priv(job->shost);
1704 unsigned long port_id = (unsigned long)job->dd_data;
1705 struct ibmvfc_event *evt;
1706 struct ibmvfc_tmf *tmf;
1707 unsigned long flags;
1711 spin_lock_irqsave(vhost->host->host_lock, flags);
1712 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1713 __ibmvfc_reset_host(vhost);
1714 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1718 vhost->aborting_passthru = 1;
1719 evt = ibmvfc_get_event(vhost);
1720 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1723 memset(tmf, 0, sizeof(*tmf));
1724 tmf->common.version = 1;
1725 tmf->common.opcode = IBMVFC_TMF_MAD;
1726 tmf->common.length = sizeof(*tmf);
1727 tmf->scsi_id = port_id;
1728 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
1729 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY;
1730 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1733 vhost->aborting_passthru = 0;
1734 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1737 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1740 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1747 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1748 * @vhost: struct ibmvfc_host to send command
1749 * @port_id: port ID to send command
1752 * 0 on success / other on failure
1754 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1756 struct ibmvfc_port_login *plogi;
1757 struct ibmvfc_target *tgt;
1758 struct ibmvfc_event *evt;
1759 union ibmvfc_iu rsp_iu;
1760 unsigned long flags;
1761 int rc = 0, issue_login = 1;
1764 spin_lock_irqsave(vhost->host->host_lock, flags);
1765 list_for_each_entry(tgt, &vhost->targets, queue) {
1766 if (tgt->scsi_id == port_id) {
1774 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1777 evt = ibmvfc_get_event(vhost);
1778 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1779 plogi = &evt->iu.plogi;
1780 memset(plogi, 0, sizeof(*plogi));
1781 plogi->common.version = 1;
1782 plogi->common.opcode = IBMVFC_PORT_LOGIN;
1783 plogi->common.length = sizeof(*plogi);
1784 plogi->scsi_id = port_id;
1785 evt->sync_iu = &rsp_iu;
1786 init_completion(&evt->comp);
1788 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1789 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1794 wait_for_completion(&evt->comp);
1796 if (rsp_iu.plogi.common.status)
1799 spin_lock_irqsave(vhost->host->host_lock, flags);
1800 ibmvfc_free_event(evt);
1802 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1808 * ibmvfc_bsg_request - Handle a BSG request
1809 * @job: struct fc_bsg_job to be executed
1812 * 0 on success / other on failure
1814 static int ibmvfc_bsg_request(struct fc_bsg_job *job)
1816 struct ibmvfc_host *vhost = shost_priv(job->shost);
1817 struct fc_rport *rport = job->rport;
1818 struct ibmvfc_passthru_mad *mad;
1819 struct ibmvfc_event *evt;
1820 union ibmvfc_iu rsp_iu;
1821 unsigned long flags, port_id = -1;
1822 unsigned int code = job->request->msgcode;
1823 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1824 u32 fc_flags, rsp_len;
1827 job->reply->reply_payload_rcv_len = 0;
1829 port_id = rport->port_id;
1832 case FC_BSG_HST_ELS_NOLOGIN:
1833 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
1834 (job->request->rqst_data.h_els.port_id[1] << 8) |
1835 job->request->rqst_data.h_els.port_id[2];
1836 case FC_BSG_RPT_ELS:
1837 fc_flags = IBMVFC_FC_ELS;
1841 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
1842 (job->request->rqst_data.h_ct.port_id[1] << 8) |
1843 job->request->rqst_data.h_ct.port_id[2];
1845 fc_flags = IBMVFC_FC_CT_IU;
1853 if (!mutex_trylock(&vhost->passthru_mutex))
1856 job->dd_data = (void *)port_id;
1857 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1858 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1861 mutex_unlock(&vhost->passthru_mutex);
1865 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1866 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1869 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1870 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1871 mutex_unlock(&vhost->passthru_mutex);
1875 if (req_seg > 1 || rsp_seg > 1) {
1881 rc = ibmvfc_bsg_plogi(vhost, port_id);
1883 spin_lock_irqsave(vhost->host->host_lock, flags);
1885 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1886 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1887 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1891 evt = ibmvfc_get_event(vhost);
1892 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1893 mad = &evt->iu.passthru;
1895 memset(mad, 0, sizeof(*mad));
1896 mad->common.version = 1;
1897 mad->common.opcode = IBMVFC_PASSTHRU;
1898 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
1900 mad->cmd_ioba.va = (u64)evt->crq.ioba +
1901 offsetof(struct ibmvfc_passthru_mad, iu);
1902 mad->cmd_ioba.len = sizeof(mad->iu);
1904 mad->iu.cmd_len = job->request_payload.payload_len;
1905 mad->iu.rsp_len = job->reply_payload.payload_len;
1906 mad->iu.flags = fc_flags;
1907 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
1909 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list);
1910 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list);
1911 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list);
1912 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list);
1913 mad->iu.scsi_id = port_id;
1914 mad->iu.tag = (u64)evt;
1915 rsp_len = mad->iu.rsp.len;
1917 evt->sync_iu = &rsp_iu;
1918 init_completion(&evt->comp);
1919 rc = ibmvfc_send_event(evt, vhost, 0);
1920 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1927 wait_for_completion(&evt->comp);
1929 if (rsp_iu.passthru.common.status)
1932 job->reply->reply_payload_rcv_len = rsp_len;
1934 spin_lock_irqsave(vhost->host->host_lock, flags);
1935 ibmvfc_free_event(evt);
1936 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1937 job->reply->result = rc;
1941 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1942 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1943 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1944 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1945 mutex_unlock(&vhost->passthru_mutex);
1951 * ibmvfc_reset_device - Reset the device with the specified reset type
1952 * @sdev: scsi device to reset
1954 * @desc: reset type description for log messages
1957 * 0 on success / other on failure
1959 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1961 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1962 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1963 struct ibmvfc_cmd *tmf;
1964 struct ibmvfc_event *evt = NULL;
1965 union ibmvfc_iu rsp_iu;
1966 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1967 int rsp_rc = -EBUSY;
1968 unsigned long flags;
1971 spin_lock_irqsave(vhost->host->host_lock, flags);
1972 if (vhost->state == IBMVFC_ACTIVE) {
1973 evt = ibmvfc_get_event(vhost);
1974 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1977 memset(tmf, 0, sizeof(*tmf));
1978 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1979 tmf->resp.len = sizeof(tmf->rsp);
1980 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1981 tmf->payload_len = sizeof(tmf->iu);
1982 tmf->resp_len = sizeof(tmf->rsp);
1983 tmf->cancel_key = (unsigned long)sdev->hostdata;
1984 tmf->tgt_scsi_id = rport->port_id;
1985 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1986 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1987 tmf->iu.tmf_flags = type;
1988 evt->sync_iu = &rsp_iu;
1990 init_completion(&evt->comp);
1991 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1993 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1996 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2001 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2002 wait_for_completion(&evt->comp);
2004 if (rsp_iu.cmd.status)
2005 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2008 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2009 rsp_code = fc_rsp->data.info.rsp_code;
2011 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2012 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2013 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
2014 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2015 fc_rsp->scsi_status);
2018 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2020 spin_lock_irqsave(vhost->host->host_lock, flags);
2021 ibmvfc_free_event(evt);
2022 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2027 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2028 * @sdev: scsi device to abort commands
2030 * This sends an Abort Task Set to the VIOS for the specified device. This does
2031 * NOT send any cancel to the VIOS. That must be done separately.
2034 * 0 on success / other on failure
2036 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2038 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2039 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2040 struct ibmvfc_cmd *tmf;
2041 struct ibmvfc_event *evt, *found_evt;
2042 union ibmvfc_iu rsp_iu;
2043 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2044 int rsp_rc = -EBUSY;
2045 unsigned long flags;
2048 spin_lock_irqsave(vhost->host->host_lock, flags);
2050 list_for_each_entry(evt, &vhost->sent, queue) {
2051 if (evt->cmnd && evt->cmnd->device == sdev) {
2058 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2059 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2060 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2064 if (vhost->state == IBMVFC_ACTIVE) {
2065 evt = ibmvfc_get_event(vhost);
2066 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2069 memset(tmf, 0, sizeof(*tmf));
2070 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
2071 tmf->resp.len = sizeof(tmf->rsp);
2072 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
2073 tmf->payload_len = sizeof(tmf->iu);
2074 tmf->resp_len = sizeof(tmf->rsp);
2075 tmf->cancel_key = (unsigned long)sdev->hostdata;
2076 tmf->tgt_scsi_id = rport->port_id;
2077 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2078 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
2079 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2080 evt->sync_iu = &rsp_iu;
2082 init_completion(&evt->comp);
2083 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2086 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2089 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2093 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2094 wait_for_completion(&evt->comp);
2096 if (rsp_iu.cmd.status)
2097 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2100 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2101 rsp_code = fc_rsp->data.info.rsp_code;
2103 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2104 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2105 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
2106 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2107 fc_rsp->scsi_status);
2110 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2112 spin_lock_irqsave(vhost->host->host_lock, flags);
2113 ibmvfc_free_event(evt);
2114 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2119 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2120 * @sdev: scsi device to cancel commands
2121 * @type: type of error recovery being performed
2123 * This sends a cancel to the VIOS for the specified device. This does
2124 * NOT send any abort to the actual device. That must be done separately.
2127 * 0 on success / other on failure
2129 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2131 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2132 struct scsi_target *starget = scsi_target(sdev);
2133 struct fc_rport *rport = starget_to_rport(starget);
2134 struct ibmvfc_tmf *tmf;
2135 struct ibmvfc_event *evt, *found_evt;
2136 union ibmvfc_iu rsp;
2137 int rsp_rc = -EBUSY;
2138 unsigned long flags;
2142 spin_lock_irqsave(vhost->host->host_lock, flags);
2144 list_for_each_entry(evt, &vhost->sent, queue) {
2145 if (evt->cmnd && evt->cmnd->device == sdev) {
2152 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2153 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2154 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2158 if (vhost->state == IBMVFC_ACTIVE) {
2159 evt = ibmvfc_get_event(vhost);
2160 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2163 memset(tmf, 0, sizeof(*tmf));
2164 tmf->common.version = 1;
2165 tmf->common.opcode = IBMVFC_TMF_MAD;
2166 tmf->common.length = sizeof(*tmf);
2167 tmf->scsi_id = rport->port_id;
2168 int_to_scsilun(sdev->lun, &tmf->lun);
2169 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
2170 tmf->cancel_key = (unsigned long)sdev->hostdata;
2171 tmf->my_cancel_key = (unsigned long)starget->hostdata;
2173 evt->sync_iu = &rsp;
2174 init_completion(&evt->comp);
2175 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2178 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2181 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2185 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2187 wait_for_completion(&evt->comp);
2188 status = rsp.mad_common.status;
2189 spin_lock_irqsave(vhost->host->host_lock, flags);
2190 ibmvfc_free_event(evt);
2191 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2193 if (status != IBMVFC_MAD_SUCCESS) {
2194 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2198 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2203 * ibmvfc_match_target - Match function for specified target
2204 * @evt: ibmvfc event struct
2205 * @device: device to match (starget)
2208 * 1 if event matches starget / 0 if event does not match starget
2210 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2212 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2218 * ibmvfc_match_lun - Match function for specified LUN
2219 * @evt: ibmvfc event struct
2220 * @device: device to match (sdev)
2223 * 1 if event matches sdev / 0 if event does not match sdev
2225 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2227 if (evt->cmnd && evt->cmnd->device == device)
2233 * ibmvfc_wait_for_ops - Wait for ops to complete
2234 * @vhost: ibmvfc host struct
2235 * @device: device to match (starget or sdev)
2236 * @match: match function
2241 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2242 int (*match) (struct ibmvfc_event *, void *))
2244 struct ibmvfc_event *evt;
2245 DECLARE_COMPLETION_ONSTACK(comp);
2247 unsigned long flags;
2248 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2253 spin_lock_irqsave(vhost->host->host_lock, flags);
2254 list_for_each_entry(evt, &vhost->sent, queue) {
2255 if (match(evt, device)) {
2256 evt->eh_comp = ∁
2260 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2263 timeout = wait_for_completion_timeout(&comp, timeout);
2267 spin_lock_irqsave(vhost->host->host_lock, flags);
2268 list_for_each_entry(evt, &vhost->sent, queue) {
2269 if (match(evt, device)) {
2270 evt->eh_comp = NULL;
2274 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2276 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2278 return wait ? FAILED : SUCCESS;
2288 * ibmvfc_eh_abort_handler - Abort a command
2289 * @cmd: scsi command to abort
2294 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2296 struct scsi_device *sdev = cmd->device;
2297 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2298 int cancel_rc, abort_rc;
2302 ibmvfc_wait_while_resetting(vhost);
2303 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2304 abort_rc = ibmvfc_abort_task_set(sdev);
2306 if (!cancel_rc && !abort_rc)
2307 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2314 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2315 * @cmd: scsi command struct
2320 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2322 struct scsi_device *sdev = cmd->device;
2323 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2324 int cancel_rc, reset_rc;
2328 ibmvfc_wait_while_resetting(vhost);
2329 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2330 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2332 if (!cancel_rc && !reset_rc)
2333 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2340 * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function
2341 * @sdev: scsi device struct
2342 * @data: return code
2345 static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data)
2347 unsigned long *rc = data;
2348 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2352 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2353 * @sdev: scsi device struct
2354 * @data: return code
2357 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2359 unsigned long *rc = data;
2360 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2364 * ibmvfc_dev_abort_all - Device iterated abort task set function
2365 * @sdev: scsi device struct
2366 * @data: return code
2369 static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2371 unsigned long *rc = data;
2372 *rc |= ibmvfc_abort_task_set(sdev);
2376 * ibmvfc_eh_target_reset_handler - Reset the target
2377 * @cmd: scsi command struct
2382 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2384 struct scsi_device *sdev = cmd->device;
2385 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2386 struct scsi_target *starget = scsi_target(sdev);
2389 unsigned long cancel_rc = 0;
2392 ibmvfc_wait_while_resetting(vhost);
2393 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2394 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2396 if (!cancel_rc && !reset_rc)
2397 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2404 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2405 * @cmd: struct scsi_cmnd having problems
2408 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2411 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2413 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2414 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2415 return rc ? FAILED : SUCCESS;
2419 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2420 * @rport: rport struct
2425 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2427 struct scsi_target *starget = to_scsi_target(&rport->dev);
2428 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2429 struct ibmvfc_host *vhost = shost_priv(shost);
2430 unsigned long cancel_rc = 0;
2431 unsigned long abort_rc = 0;
2435 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts);
2436 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2438 if (!cancel_rc && !abort_rc)
2439 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2442 ibmvfc_issue_fc_host_lip(shost);
2446 static const struct {
2447 enum ibmvfc_async_event ae;
2450 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2451 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2452 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2453 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2454 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2455 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2456 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2457 { IBMVFC_AE_LINK_UP, "Link Up" },
2458 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2459 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2460 { IBMVFC_AE_HALT, "Halt" },
2461 { IBMVFC_AE_RESUME, "Resume" },
2462 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2465 static const char *unknown_ae = "Unknown async";
2468 * ibmvfc_get_ae_desc - Get text description for async event
2472 static const char *ibmvfc_get_ae_desc(u64 ae)
2476 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2477 if (ae_desc[i].ae == ae)
2478 return ae_desc[i].desc;
2484 * ibmvfc_handle_async - Handle an async event from the adapter
2485 * @crq: crq to process
2486 * @vhost: ibmvfc host struct
2489 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2490 struct ibmvfc_host *vhost)
2492 const char *desc = ibmvfc_get_ae_desc(crq->event);
2493 struct ibmvfc_target *tgt;
2495 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2496 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
2498 switch (crq->event) {
2499 case IBMVFC_AE_RESUME:
2500 switch (crq->link_state) {
2501 case IBMVFC_AE_LS_LINK_DOWN:
2502 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2504 case IBMVFC_AE_LS_LINK_DEAD:
2505 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2507 case IBMVFC_AE_LS_LINK_UP:
2508 case IBMVFC_AE_LS_LINK_BOUNCED:
2510 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2511 vhost->delay_init = 1;
2512 __ibmvfc_reset_host(vhost);
2517 case IBMVFC_AE_LINK_UP:
2518 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2519 vhost->delay_init = 1;
2520 __ibmvfc_reset_host(vhost);
2522 case IBMVFC_AE_SCN_FABRIC:
2523 case IBMVFC_AE_SCN_DOMAIN:
2524 vhost->events_to_log |= IBMVFC_AE_RSCN;
2525 vhost->delay_init = 1;
2526 __ibmvfc_reset_host(vhost);
2528 case IBMVFC_AE_SCN_NPORT:
2529 case IBMVFC_AE_SCN_GROUP:
2530 vhost->events_to_log |= IBMVFC_AE_RSCN;
2531 ibmvfc_reinit_host(vhost);
2533 case IBMVFC_AE_ELS_LOGO:
2534 case IBMVFC_AE_ELS_PRLO:
2535 case IBMVFC_AE_ELS_PLOGI:
2536 list_for_each_entry(tgt, &vhost->targets, queue) {
2537 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2539 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id)
2541 if (crq->wwpn && tgt->ids.port_name != crq->wwpn)
2543 if (crq->node_name && tgt->ids.node_name != crq->node_name)
2545 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO)
2547 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) {
2548 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2549 ibmvfc_reinit_host(vhost);
2553 case IBMVFC_AE_LINK_DOWN:
2554 case IBMVFC_AE_ADAPTER_FAILED:
2555 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2557 case IBMVFC_AE_LINK_DEAD:
2558 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2560 case IBMVFC_AE_HALT:
2561 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2564 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2570 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2571 * @crq: Command/Response queue
2572 * @vhost: ibmvfc host struct
2575 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2578 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2580 switch (crq->valid) {
2581 case IBMVFC_CRQ_INIT_RSP:
2582 switch (crq->format) {
2583 case IBMVFC_CRQ_INIT:
2584 dev_info(vhost->dev, "Partner initialized\n");
2585 /* Send back a response */
2586 rc = ibmvfc_send_crq_init_complete(vhost);
2588 ibmvfc_init_host(vhost);
2590 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2592 case IBMVFC_CRQ_INIT_COMPLETE:
2593 dev_info(vhost->dev, "Partner initialization complete\n");
2594 ibmvfc_init_host(vhost);
2597 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2600 case IBMVFC_CRQ_XPORT_EVENT:
2601 vhost->state = IBMVFC_NO_CRQ;
2602 vhost->logged_in = 0;
2603 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2604 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2605 /* We need to re-setup the interpartition connection */
2606 dev_info(vhost->dev, "Re-enabling adapter\n");
2607 vhost->client_migrated = 1;
2608 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2609 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2610 (rc = ibmvfc_send_crq_init(vhost))) {
2611 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2612 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2614 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2616 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2618 ibmvfc_purge_requests(vhost, DID_ERROR);
2619 if ((rc = ibmvfc_reset_crq(vhost)) ||
2620 (rc = ibmvfc_send_crq_init(vhost))) {
2621 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2622 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2624 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2627 case IBMVFC_CRQ_CMD_RSP:
2630 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2634 if (crq->format == IBMVFC_ASYNC_EVENT)
2637 /* The only kind of payload CRQs we should get are responses to
2638 * things we send. Make sure this response is to something we
2641 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2642 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2647 if (unlikely(atomic_read(&evt->free))) {
2648 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2653 del_timer(&evt->timer);
2654 list_del(&evt->queue);
2655 ibmvfc_trc_end(evt);
2660 * ibmvfc_scan_finished - Check if the device scan is done.
2661 * @shost: scsi host struct
2662 * @time: current elapsed time
2665 * 0 if scan is not done / 1 if scan is done
2667 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2669 unsigned long flags;
2670 struct ibmvfc_host *vhost = shost_priv(shost);
2673 spin_lock_irqsave(shost->host_lock, flags);
2674 if (time >= (init_timeout * HZ)) {
2675 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2676 "continuing initialization\n", init_timeout);
2680 if (vhost->scan_complete)
2682 spin_unlock_irqrestore(shost->host_lock, flags);
2687 * ibmvfc_slave_alloc - Setup the device's task set value
2688 * @sdev: struct scsi_device device to configure
2690 * Set the device's task set value so that error handling works as
2694 * 0 on success / -ENXIO if device does not exist
2696 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2698 struct Scsi_Host *shost = sdev->host;
2699 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2700 struct ibmvfc_host *vhost = shost_priv(shost);
2701 unsigned long flags = 0;
2703 if (!rport || fc_remote_port_chkready(rport))
2706 spin_lock_irqsave(shost->host_lock, flags);
2707 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2708 spin_unlock_irqrestore(shost->host_lock, flags);
2713 * ibmvfc_target_alloc - Setup the target's task set value
2714 * @starget: struct scsi_target
2716 * Set the target's task set value so that error handling works as
2720 * 0 on success / -ENXIO if device does not exist
2722 static int ibmvfc_target_alloc(struct scsi_target *starget)
2724 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2725 struct ibmvfc_host *vhost = shost_priv(shost);
2726 unsigned long flags = 0;
2728 spin_lock_irqsave(shost->host_lock, flags);
2729 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2730 spin_unlock_irqrestore(shost->host_lock, flags);
2735 * ibmvfc_slave_configure - Configure the device
2736 * @sdev: struct scsi_device device to configure
2738 * Enable allow_restart for a device if it is a disk. Adjust the
2739 * queue_depth here also.
2744 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2746 struct Scsi_Host *shost = sdev->host;
2747 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2748 unsigned long flags = 0;
2750 spin_lock_irqsave(shost->host_lock, flags);
2751 if (sdev->type == TYPE_DISK)
2752 sdev->allow_restart = 1;
2754 if (sdev->tagged_supported) {
2755 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2756 scsi_activate_tcq(sdev, sdev->queue_depth);
2758 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2760 rport->dev_loss_tmo = dev_loss_tmo;
2761 spin_unlock_irqrestore(shost->host_lock, flags);
2766 * ibmvfc_change_queue_depth - Change the device's queue depth
2767 * @sdev: scsi device struct
2768 * @qdepth: depth to set
2769 * @reason: calling context
2774 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth,
2777 if (reason != SCSI_QDEPTH_DEFAULT)
2780 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2781 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2783 scsi_adjust_queue_depth(sdev, 0, qdepth);
2784 return sdev->queue_depth;
2788 * ibmvfc_change_queue_type - Change the device's queue type
2789 * @sdev: scsi device struct
2790 * @tag_type: type of tags to use
2793 * actual queue type set
2795 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2797 if (sdev->tagged_supported) {
2798 scsi_set_tag_type(sdev, tag_type);
2801 scsi_activate_tcq(sdev, sdev->queue_depth);
2803 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2810 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2811 struct device_attribute *attr, char *buf)
2813 struct Scsi_Host *shost = class_to_shost(dev);
2814 struct ibmvfc_host *vhost = shost_priv(shost);
2816 return snprintf(buf, PAGE_SIZE, "%s\n",
2817 vhost->login_buf->resp.partition_name);
2820 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2821 struct device_attribute *attr, char *buf)
2823 struct Scsi_Host *shost = class_to_shost(dev);
2824 struct ibmvfc_host *vhost = shost_priv(shost);
2826 return snprintf(buf, PAGE_SIZE, "%s\n",
2827 vhost->login_buf->resp.device_name);
2830 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2831 struct device_attribute *attr, char *buf)
2833 struct Scsi_Host *shost = class_to_shost(dev);
2834 struct ibmvfc_host *vhost = shost_priv(shost);
2836 return snprintf(buf, PAGE_SIZE, "%s\n",
2837 vhost->login_buf->resp.port_loc_code);
2840 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2841 struct device_attribute *attr, char *buf)
2843 struct Scsi_Host *shost = class_to_shost(dev);
2844 struct ibmvfc_host *vhost = shost_priv(shost);
2846 return snprintf(buf, PAGE_SIZE, "%s\n",
2847 vhost->login_buf->resp.drc_name);
2850 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2851 struct device_attribute *attr, char *buf)
2853 struct Scsi_Host *shost = class_to_shost(dev);
2854 struct ibmvfc_host *vhost = shost_priv(shost);
2855 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2858 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2859 struct device_attribute *attr, char *buf)
2861 struct Scsi_Host *shost = class_to_shost(dev);
2862 struct ibmvfc_host *vhost = shost_priv(shost);
2863 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2867 * ibmvfc_show_log_level - Show the adapter's error logging level
2868 * @dev: class device struct
2872 * number of bytes printed to buffer
2874 static ssize_t ibmvfc_show_log_level(struct device *dev,
2875 struct device_attribute *attr, char *buf)
2877 struct Scsi_Host *shost = class_to_shost(dev);
2878 struct ibmvfc_host *vhost = shost_priv(shost);
2879 unsigned long flags = 0;
2882 spin_lock_irqsave(shost->host_lock, flags);
2883 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2884 spin_unlock_irqrestore(shost->host_lock, flags);
2889 * ibmvfc_store_log_level - Change the adapter's error logging level
2890 * @dev: class device struct
2894 * number of bytes printed to buffer
2896 static ssize_t ibmvfc_store_log_level(struct device *dev,
2897 struct device_attribute *attr,
2898 const char *buf, size_t count)
2900 struct Scsi_Host *shost = class_to_shost(dev);
2901 struct ibmvfc_host *vhost = shost_priv(shost);
2902 unsigned long flags = 0;
2904 spin_lock_irqsave(shost->host_lock, flags);
2905 vhost->log_level = simple_strtoul(buf, NULL, 10);
2906 spin_unlock_irqrestore(shost->host_lock, flags);
2910 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
2911 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
2912 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
2913 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
2914 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
2915 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
2916 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
2917 ibmvfc_show_log_level, ibmvfc_store_log_level);
2919 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2921 * ibmvfc_read_trace - Dump the adapter trace
2922 * @filp: open sysfs file
2923 * @kobj: kobject struct
2924 * @bin_attr: bin_attribute struct
2927 * @count: buffer size
2930 * number of bytes printed to buffer
2932 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
2933 struct bin_attribute *bin_attr,
2934 char *buf, loff_t off, size_t count)
2936 struct device *dev = container_of(kobj, struct device, kobj);
2937 struct Scsi_Host *shost = class_to_shost(dev);
2938 struct ibmvfc_host *vhost = shost_priv(shost);
2939 unsigned long flags = 0;
2940 int size = IBMVFC_TRACE_SIZE;
2941 char *src = (char *)vhost->trace;
2945 if (off + count > size) {
2950 spin_lock_irqsave(shost->host_lock, flags);
2951 memcpy(buf, &src[off], count);
2952 spin_unlock_irqrestore(shost->host_lock, flags);
2956 static struct bin_attribute ibmvfc_trace_attr = {
2962 .read = ibmvfc_read_trace,
2966 static struct device_attribute *ibmvfc_attrs[] = {
2967 &dev_attr_partition_name,
2968 &dev_attr_device_name,
2969 &dev_attr_port_loc_code,
2971 &dev_attr_npiv_version,
2972 &dev_attr_capabilities,
2973 &dev_attr_log_level,
2977 static struct scsi_host_template driver_template = {
2978 .module = THIS_MODULE,
2979 .name = "IBM POWER Virtual FC Adapter",
2980 .proc_name = IBMVFC_NAME,
2981 .queuecommand = ibmvfc_queuecommand,
2982 .eh_abort_handler = ibmvfc_eh_abort_handler,
2983 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2984 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2985 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2986 .slave_alloc = ibmvfc_slave_alloc,
2987 .slave_configure = ibmvfc_slave_configure,
2988 .target_alloc = ibmvfc_target_alloc,
2989 .scan_finished = ibmvfc_scan_finished,
2990 .change_queue_depth = ibmvfc_change_queue_depth,
2991 .change_queue_type = ibmvfc_change_queue_type,
2993 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2995 .sg_tablesize = SG_ALL,
2996 .max_sectors = IBMVFC_MAX_SECTORS,
2997 .use_clustering = ENABLE_CLUSTERING,
2998 .shost_attrs = ibmvfc_attrs,
3002 * ibmvfc_next_async_crq - Returns the next entry in async queue
3003 * @vhost: ibmvfc host struct
3006 * Pointer to next entry in queue / NULL if empty
3008 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3010 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3011 struct ibmvfc_async_crq *crq;
3013 crq = &async_crq->msgs[async_crq->cur];
3014 if (crq->valid & 0x80) {
3015 if (++async_crq->cur == async_crq->size)
3025 * ibmvfc_next_crq - Returns the next entry in message queue
3026 * @vhost: ibmvfc host struct
3029 * Pointer to next entry in queue / NULL if empty
3031 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3033 struct ibmvfc_crq_queue *queue = &vhost->crq;
3034 struct ibmvfc_crq *crq;
3036 crq = &queue->msgs[queue->cur];
3037 if (crq->valid & 0x80) {
3038 if (++queue->cur == queue->size)
3048 * ibmvfc_interrupt - Interrupt handler
3049 * @irq: number of irq to handle, not used
3050 * @dev_instance: ibmvfc_host that received interrupt
3055 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3057 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3058 unsigned long flags;
3060 spin_lock_irqsave(vhost->host->host_lock, flags);
3061 vio_disable_interrupts(to_vio_dev(vhost->dev));
3062 tasklet_schedule(&vhost->tasklet);
3063 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3068 * ibmvfc_tasklet - Interrupt handler tasklet
3069 * @data: ibmvfc host struct
3074 static void ibmvfc_tasklet(void *data)
3076 struct ibmvfc_host *vhost = data;
3077 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3078 struct ibmvfc_crq *crq;
3079 struct ibmvfc_async_crq *async;
3080 unsigned long flags;
3083 spin_lock_irqsave(vhost->host->host_lock, flags);
3085 /* Pull all the valid messages off the async CRQ */
3086 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3087 ibmvfc_handle_async(async, vhost);
3092 /* Pull all the valid messages off the CRQ */
3093 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3094 ibmvfc_handle_crq(crq, vhost);
3099 vio_enable_interrupts(vdev);
3100 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3101 vio_disable_interrupts(vdev);
3102 ibmvfc_handle_async(async, vhost);
3105 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3106 vio_disable_interrupts(vdev);
3107 ibmvfc_handle_crq(crq, vhost);
3114 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3118 * ibmvfc_init_tgt - Set the next init job step for the target
3119 * @tgt: ibmvfc target struct
3120 * @job_step: job step to perform
3123 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3124 void (*job_step) (struct ibmvfc_target *))
3126 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3127 tgt->job_step = job_step;
3128 wake_up(&tgt->vhost->work_wait_q);
3132 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3133 * @tgt: ibmvfc target struct
3134 * @job_step: initialization job step
3136 * Returns: 1 if step will be retried / 0 if not
3139 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3140 void (*job_step) (struct ibmvfc_target *))
3142 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3143 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3144 wake_up(&tgt->vhost->work_wait_q);
3147 ibmvfc_init_tgt(tgt, job_step);
3151 /* Defined in FC-LS */
3152 static const struct {
3169 * ibmvfc_get_prli_rsp - Find PRLI response index
3170 * @flags: PRLI response flags
3173 static int ibmvfc_get_prli_rsp(u16 flags)
3176 int code = (flags & 0x0f00) >> 8;
3178 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3179 if (prli_rsp[i].code == code)
3186 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3187 * @evt: ibmvfc event struct
3190 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3192 struct ibmvfc_target *tgt = evt->tgt;
3193 struct ibmvfc_host *vhost = evt->vhost;
3194 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3195 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3196 u32 status = rsp->common.status;
3197 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3199 vhost->discovery_threads--;
3200 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3202 case IBMVFC_MAD_SUCCESS:
3203 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3204 parms->type, parms->flags, parms->service_parms);
3206 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3207 index = ibmvfc_get_prli_rsp(parms->flags);
3208 if (prli_rsp[index].logged_in) {
3209 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
3210 tgt->need_login = 0;
3212 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
3213 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3214 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
3215 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3218 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3219 } else if (prli_rsp[index].retry)
3220 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3222 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3224 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3226 case IBMVFC_MAD_DRIVER_FAILED:
3228 case IBMVFC_MAD_CRQ_ERROR:
3229 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3231 case IBMVFC_MAD_FAILED:
3233 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED)
3234 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3235 else if (tgt->logo_rcvd)
3236 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3237 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3238 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3240 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3242 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3243 ibmvfc_get_cmd_error(rsp->status, rsp->error),
3244 rsp->status, rsp->error, status);
3248 kref_put(&tgt->kref, ibmvfc_release_tgt);
3249 ibmvfc_free_event(evt);
3250 wake_up(&vhost->work_wait_q);
3254 * ibmvfc_tgt_send_prli - Send a process login
3255 * @tgt: ibmvfc target struct
3258 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3260 struct ibmvfc_process_login *prli;
3261 struct ibmvfc_host *vhost = tgt->vhost;
3262 struct ibmvfc_event *evt;
3264 if (vhost->discovery_threads >= disc_threads)
3267 kref_get(&tgt->kref);
3268 evt = ibmvfc_get_event(vhost);
3269 vhost->discovery_threads++;
3270 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3272 prli = &evt->iu.prli;
3273 memset(prli, 0, sizeof(*prli));
3274 prli->common.version = 1;
3275 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
3276 prli->common.length = sizeof(*prli);
3277 prli->scsi_id = tgt->scsi_id;
3279 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3280 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
3281 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
3283 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3284 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3285 vhost->discovery_threads--;
3286 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3287 kref_put(&tgt->kref, ibmvfc_release_tgt);
3289 tgt_dbg(tgt, "Sent process login\n");
3293 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3294 * @evt: ibmvfc event struct
3297 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3299 struct ibmvfc_target *tgt = evt->tgt;
3300 struct ibmvfc_host *vhost = evt->vhost;
3301 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3302 u32 status = rsp->common.status;
3303 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3305 vhost->discovery_threads--;
3306 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3308 case IBMVFC_MAD_SUCCESS:
3309 tgt_dbg(tgt, "Port Login succeeded\n");
3310 if (tgt->ids.port_name &&
3311 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3313 tgt_dbg(tgt, "Port re-init required\n");
3316 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3317 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3318 tgt->ids.port_id = tgt->scsi_id;
3319 memcpy(&tgt->service_parms, &rsp->service_parms,
3320 sizeof(tgt->service_parms));
3321 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3322 sizeof(tgt->service_parms_change));
3323 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3325 case IBMVFC_MAD_DRIVER_FAILED:
3327 case IBMVFC_MAD_CRQ_ERROR:
3328 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3330 case IBMVFC_MAD_FAILED:
3332 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3333 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3335 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3337 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3338 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3339 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3340 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
3344 kref_put(&tgt->kref, ibmvfc_release_tgt);
3345 ibmvfc_free_event(evt);
3346 wake_up(&vhost->work_wait_q);
3350 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3351 * @tgt: ibmvfc target struct
3354 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3356 struct ibmvfc_port_login *plogi;
3357 struct ibmvfc_host *vhost = tgt->vhost;
3358 struct ibmvfc_event *evt;
3360 if (vhost->discovery_threads >= disc_threads)
3363 kref_get(&tgt->kref);
3365 evt = ibmvfc_get_event(vhost);
3366 vhost->discovery_threads++;
3367 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3368 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3370 plogi = &evt->iu.plogi;
3371 memset(plogi, 0, sizeof(*plogi));
3372 plogi->common.version = 1;
3373 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3374 plogi->common.length = sizeof(*plogi);
3375 plogi->scsi_id = tgt->scsi_id;
3377 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3378 vhost->discovery_threads--;
3379 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3380 kref_put(&tgt->kref, ibmvfc_release_tgt);
3382 tgt_dbg(tgt, "Sent port login\n");
3386 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3387 * @evt: ibmvfc event struct
3390 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3392 struct ibmvfc_target *tgt = evt->tgt;
3393 struct ibmvfc_host *vhost = evt->vhost;
3394 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3395 u32 status = rsp->common.status;
3397 vhost->discovery_threads--;
3398 ibmvfc_free_event(evt);
3399 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3402 case IBMVFC_MAD_SUCCESS:
3403 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3405 case IBMVFC_MAD_DRIVER_FAILED:
3406 kref_put(&tgt->kref, ibmvfc_release_tgt);
3407 wake_up(&vhost->work_wait_q);
3409 case IBMVFC_MAD_FAILED:
3411 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3415 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3416 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3417 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3418 tgt->scsi_id != tgt->new_scsi_id)
3419 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3420 kref_put(&tgt->kref, ibmvfc_release_tgt);
3421 wake_up(&vhost->work_wait_q);
3425 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3426 * @tgt: ibmvfc target struct
3429 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3431 struct ibmvfc_implicit_logout *mad;
3432 struct ibmvfc_host *vhost = tgt->vhost;
3433 struct ibmvfc_event *evt;
3435 if (vhost->discovery_threads >= disc_threads)
3438 kref_get(&tgt->kref);
3439 evt = ibmvfc_get_event(vhost);
3440 vhost->discovery_threads++;
3441 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3443 mad = &evt->iu.implicit_logout;
3444 memset(mad, 0, sizeof(*mad));
3445 mad->common.version = 1;
3446 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3447 mad->common.length = sizeof(*mad);
3448 mad->old_scsi_id = tgt->scsi_id;
3450 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3451 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3452 vhost->discovery_threads--;
3453 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3454 kref_put(&tgt->kref, ibmvfc_release_tgt);
3456 tgt_dbg(tgt, "Sent Implicit Logout\n");
3460 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3461 * @mad: ibmvfc passthru mad struct
3462 * @tgt: ibmvfc target struct
3465 * 1 if PLOGI needed / 0 if PLOGI not needed
3467 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3468 struct ibmvfc_target *tgt)
3470 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3471 sizeof(tgt->ids.port_name)))
3473 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3474 sizeof(tgt->ids.node_name)))
3476 if (mad->fc_iu.response[6] != tgt->scsi_id)
3482 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3483 * @evt: ibmvfc event struct
3486 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3488 struct ibmvfc_target *tgt = evt->tgt;
3489 struct ibmvfc_host *vhost = evt->vhost;
3490 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3491 u32 status = mad->common.status;
3492 u8 fc_reason, fc_explain;
3494 vhost->discovery_threads--;
3495 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3496 del_timer(&tgt->timer);
3499 case IBMVFC_MAD_SUCCESS:
3500 tgt_dbg(tgt, "ADISC succeeded\n");
3501 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3502 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3504 case IBMVFC_MAD_DRIVER_FAILED:
3506 case IBMVFC_MAD_FAILED:
3508 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3509 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3510 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3511 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3512 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3513 mad->iu.status, mad->iu.error,
3514 ibmvfc_get_fc_type(fc_reason), fc_reason,
3515 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3519 kref_put(&tgt->kref, ibmvfc_release_tgt);
3520 ibmvfc_free_event(evt);
3521 wake_up(&vhost->work_wait_q);
3525 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3526 * @evt: ibmvfc event struct
3529 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3531 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3533 memset(mad, 0, sizeof(*mad));
3534 mad->common.version = 1;
3535 mad->common.opcode = IBMVFC_PASSTHRU;
3536 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3537 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3538 offsetof(struct ibmvfc_passthru_mad, iu);
3539 mad->cmd_ioba.len = sizeof(mad->iu);
3540 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3541 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3542 mad->iu.cmd.va = (u64)evt->crq.ioba +
3543 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3544 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3545 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3546 mad->iu.rsp.va = (u64)evt->crq.ioba +
3547 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3548 offsetof(struct ibmvfc_passthru_fc_iu, response);
3549 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3553 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3554 * @evt: ibmvfc event struct
3556 * Just cleanup this event struct. Everything else is handled by
3557 * the ADISC completion handler. If the ADISC never actually comes
3558 * back, we still have the timer running on the ADISC event struct
3559 * which will fire and cause the CRQ to get reset.
3562 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3564 struct ibmvfc_host *vhost = evt->vhost;
3565 struct ibmvfc_target *tgt = evt->tgt;
3567 tgt_dbg(tgt, "ADISC cancel complete\n");
3568 vhost->abort_threads--;
3569 ibmvfc_free_event(evt);
3570 kref_put(&tgt->kref, ibmvfc_release_tgt);
3571 wake_up(&vhost->work_wait_q);
3575 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3576 * @tgt: ibmvfc target struct
3578 * If an ADISC times out, send a cancel. If the cancel times
3579 * out, reset the CRQ. When the ADISC comes back as cancelled,
3580 * log back into the target.
3582 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3584 struct ibmvfc_host *vhost = tgt->vhost;
3585 struct ibmvfc_event *evt;
3586 struct ibmvfc_tmf *tmf;
3587 unsigned long flags;
3590 tgt_dbg(tgt, "ADISC timeout\n");
3591 spin_lock_irqsave(vhost->host->host_lock, flags);
3592 if (vhost->abort_threads >= disc_threads ||
3593 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3594 vhost->state != IBMVFC_INITIALIZING ||
3595 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3596 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3600 vhost->abort_threads++;
3601 kref_get(&tgt->kref);
3602 evt = ibmvfc_get_event(vhost);
3603 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3607 memset(tmf, 0, sizeof(*tmf));
3608 tmf->common.version = 1;
3609 tmf->common.opcode = IBMVFC_TMF_MAD;
3610 tmf->common.length = sizeof(*tmf);
3611 tmf->scsi_id = tgt->scsi_id;
3612 tmf->cancel_key = tgt->cancel_key;
3614 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3617 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3618 vhost->abort_threads--;
3619 kref_put(&tgt->kref, ibmvfc_release_tgt);
3620 __ibmvfc_reset_host(vhost);
3622 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3623 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3627 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3628 * @tgt: ibmvfc target struct
3630 * When sending an ADISC we end up with two timers running. The
3631 * first timer is the timer in the ibmvfc target struct. If this
3632 * fires, we send a cancel to the target. The second timer is the
3633 * timer on the ibmvfc event for the ADISC, which is longer. If that
3634 * fires, it means the ADISC timed out and our attempt to cancel it
3635 * also failed, so we need to reset the CRQ.
3637 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3639 struct ibmvfc_passthru_mad *mad;
3640 struct ibmvfc_host *vhost = tgt->vhost;
3641 struct ibmvfc_event *evt;
3643 if (vhost->discovery_threads >= disc_threads)
3646 kref_get(&tgt->kref);
3647 evt = ibmvfc_get_event(vhost);
3648 vhost->discovery_threads++;
3649 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3652 ibmvfc_init_passthru(evt);
3653 mad = &evt->iu.passthru;
3654 mad->iu.flags = IBMVFC_FC_ELS;
3655 mad->iu.scsi_id = tgt->scsi_id;
3656 mad->iu.cancel_key = tgt->cancel_key;
3658 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3659 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3660 sizeof(vhost->login_buf->resp.port_name));
3661 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3662 sizeof(vhost->login_buf->resp.node_name));
3663 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3665 if (timer_pending(&tgt->timer))
3666 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3668 tgt->timer.data = (unsigned long) tgt;
3669 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3670 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3671 add_timer(&tgt->timer);
3674 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3675 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3676 vhost->discovery_threads--;
3677 del_timer(&tgt->timer);
3678 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3679 kref_put(&tgt->kref, ibmvfc_release_tgt);
3681 tgt_dbg(tgt, "Sent ADISC\n");
3685 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3686 * @evt: ibmvfc event struct
3689 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3691 struct ibmvfc_target *tgt = evt->tgt;
3692 struct ibmvfc_host *vhost = evt->vhost;
3693 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3694 u32 status = rsp->common.status;
3695 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3697 vhost->discovery_threads--;
3698 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3700 case IBMVFC_MAD_SUCCESS:
3701 tgt_dbg(tgt, "Query Target succeeded\n");
3702 tgt->new_scsi_id = rsp->scsi_id;
3703 if (rsp->scsi_id != tgt->scsi_id)
3704 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3706 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3708 case IBMVFC_MAD_DRIVER_FAILED:
3710 case IBMVFC_MAD_CRQ_ERROR:
3711 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3713 case IBMVFC_MAD_FAILED:
3715 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3716 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3717 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3718 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3719 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3720 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3722 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3724 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3725 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3726 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3727 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3731 kref_put(&tgt->kref, ibmvfc_release_tgt);
3732 ibmvfc_free_event(evt);
3733 wake_up(&vhost->work_wait_q);
3737 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3738 * @tgt: ibmvfc target struct
3741 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3743 struct ibmvfc_query_tgt *query_tgt;
3744 struct ibmvfc_host *vhost = tgt->vhost;
3745 struct ibmvfc_event *evt;
3747 if (vhost->discovery_threads >= disc_threads)
3750 kref_get(&tgt->kref);
3751 evt = ibmvfc_get_event(vhost);
3752 vhost->discovery_threads++;
3754 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3755 query_tgt = &evt->iu.query_tgt;
3756 memset(query_tgt, 0, sizeof(*query_tgt));
3757 query_tgt->common.version = 1;
3758 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3759 query_tgt->common.length = sizeof(*query_tgt);
3760 query_tgt->wwpn = tgt->ids.port_name;
3762 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3763 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3764 vhost->discovery_threads--;
3765 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3766 kref_put(&tgt->kref, ibmvfc_release_tgt);
3768 tgt_dbg(tgt, "Sent Query Target\n");
3772 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3773 * @vhost: ibmvfc host struct
3774 * @scsi_id: SCSI ID to allocate target for
3777 * 0 on success / other on failure
3779 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3781 struct ibmvfc_target *tgt;
3782 unsigned long flags;
3784 spin_lock_irqsave(vhost->host->host_lock, flags);
3785 list_for_each_entry(tgt, &vhost->targets, queue) {
3786 if (tgt->scsi_id == scsi_id) {
3787 if (tgt->need_login)
3788 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3792 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3794 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3796 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
3801 memset(tgt, 0, sizeof(*tgt));
3802 tgt->scsi_id = scsi_id;
3803 tgt->new_scsi_id = scsi_id;
3805 tgt->need_login = 1;
3806 tgt->cancel_key = vhost->task_set++;
3807 init_timer(&tgt->timer);
3808 kref_init(&tgt->kref);
3809 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3810 spin_lock_irqsave(vhost->host->host_lock, flags);
3811 list_add_tail(&tgt->queue, &vhost->targets);
3814 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3819 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3820 * @vhost: ibmvfc host struct
3823 * 0 on success / other on failure
3825 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3829 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3830 rc = ibmvfc_alloc_target(vhost,
3831 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3837 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3838 * @evt: ibmvfc event struct
3841 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3843 struct ibmvfc_host *vhost = evt->vhost;
3844 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3845 u32 mad_status = rsp->common.status;
3846 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3848 switch (mad_status) {
3849 case IBMVFC_MAD_SUCCESS:
3850 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3851 vhost->num_targets = rsp->num_written;
3852 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3854 case IBMVFC_MAD_FAILED:
3855 level += ibmvfc_retry_host_init(vhost);
3856 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3857 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3859 case IBMVFC_MAD_DRIVER_FAILED:
3862 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3863 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3867 ibmvfc_free_event(evt);
3868 wake_up(&vhost->work_wait_q);
3872 * ibmvfc_discover_targets - Send Discover Targets MAD
3873 * @vhost: ibmvfc host struct
3876 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3878 struct ibmvfc_discover_targets *mad;
3879 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3881 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3882 mad = &evt->iu.discover_targets;
3883 memset(mad, 0, sizeof(*mad));
3884 mad->common.version = 1;
3885 mad->common.opcode = IBMVFC_DISC_TARGETS;
3886 mad->common.length = sizeof(*mad);
3887 mad->bufflen = vhost->disc_buf_sz;
3888 mad->buffer.va = vhost->disc_buf_dma;
3889 mad->buffer.len = vhost->disc_buf_sz;
3890 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3892 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3893 ibmvfc_dbg(vhost, "Sent discover targets\n");
3895 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3899 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3900 * @evt: ibmvfc event struct
3903 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3905 struct ibmvfc_host *vhost = evt->vhost;
3906 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3907 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3908 unsigned int npiv_max_sectors;
3909 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3911 switch (mad_status) {
3912 case IBMVFC_MAD_SUCCESS:
3913 ibmvfc_free_event(evt);
3915 case IBMVFC_MAD_FAILED:
3916 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3917 level += ibmvfc_retry_host_init(vhost);
3919 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3920 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
3921 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3922 ibmvfc_free_event(evt);
3924 case IBMVFC_MAD_CRQ_ERROR:
3925 ibmvfc_retry_host_init(vhost);
3926 case IBMVFC_MAD_DRIVER_FAILED:
3927 ibmvfc_free_event(evt);
3930 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3931 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3932 ibmvfc_free_event(evt);
3936 vhost->client_migrated = 0;
3938 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3939 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3941 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3942 wake_up(&vhost->work_wait_q);
3946 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3947 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3949 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3950 wake_up(&vhost->work_wait_q);
3954 vhost->logged_in = 1;
3955 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3956 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3957 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3958 rsp->drc_name, npiv_max_sectors);
3960 fc_host_fabric_name(vhost->host) = rsp->node_name;
3961 fc_host_node_name(vhost->host) = rsp->node_name;
3962 fc_host_port_name(vhost->host) = rsp->port_name;
3963 fc_host_port_id(vhost->host) = rsp->scsi_id;
3964 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3965 fc_host_supported_classes(vhost->host) = 0;
3966 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3967 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3968 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3969 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3970 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3971 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3972 fc_host_maxframe_size(vhost->host) =
3973 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3975 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3976 vhost->host->max_sectors = npiv_max_sectors;
3977 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3978 wake_up(&vhost->work_wait_q);
3982 * ibmvfc_npiv_login - Sends NPIV login
3983 * @vhost: ibmvfc host struct
3986 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3988 struct ibmvfc_npiv_login_mad *mad;
3989 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3991 ibmvfc_gather_partition_info(vhost);
3992 ibmvfc_set_login_info(vhost);
3993 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3995 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3996 mad = &evt->iu.npiv_login;
3997 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3998 mad->common.version = 1;
3999 mad->common.opcode = IBMVFC_NPIV_LOGIN;
4000 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
4001 mad->buffer.va = vhost->login_buf_dma;
4002 mad->buffer.len = sizeof(*vhost->login_buf);
4004 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4006 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4007 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4009 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4013 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4014 * @vhost: ibmvfc host struct
4017 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4019 struct ibmvfc_host *vhost = evt->vhost;
4020 u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
4022 ibmvfc_free_event(evt);
4024 switch (mad_status) {
4025 case IBMVFC_MAD_SUCCESS:
4026 if (list_empty(&vhost->sent) &&
4027 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
4028 ibmvfc_init_host(vhost);
4032 case IBMVFC_MAD_FAILED:
4033 case IBMVFC_MAD_NOT_SUPPORTED:
4034 case IBMVFC_MAD_CRQ_ERROR:
4035 case IBMVFC_MAD_DRIVER_FAILED:
4037 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4041 ibmvfc_hard_reset_host(vhost);
4045 * ibmvfc_npiv_logout - Issue an NPIV Logout
4046 * @vhost: ibmvfc host struct
4049 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4051 struct ibmvfc_npiv_logout_mad *mad;
4052 struct ibmvfc_event *evt;
4054 evt = ibmvfc_get_event(vhost);
4055 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4057 mad = &evt->iu.npiv_logout;
4058 memset(mad, 0, sizeof(*mad));
4059 mad->common.version = 1;
4060 mad->common.opcode = IBMVFC_NPIV_LOGOUT;
4061 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
4063 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4065 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4066 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4068 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4072 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4073 * @vhost: ibmvfc host struct
4076 * 1 if work to do / 0 if not
4078 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4080 struct ibmvfc_target *tgt;
4082 list_for_each_entry(tgt, &vhost->targets, queue) {
4083 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4084 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4092 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4093 * @vhost: ibmvfc host struct
4096 * 1 if work to do / 0 if not
4098 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4100 struct ibmvfc_target *tgt;
4102 if (kthread_should_stop())
4104 switch (vhost->action) {
4105 case IBMVFC_HOST_ACTION_NONE:
4106 case IBMVFC_HOST_ACTION_INIT_WAIT:
4107 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4109 case IBMVFC_HOST_ACTION_TGT_INIT:
4110 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4111 if (vhost->discovery_threads == disc_threads)
4113 list_for_each_entry(tgt, &vhost->targets, queue)
4114 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4116 list_for_each_entry(tgt, &vhost->targets, queue)
4117 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4120 case IBMVFC_HOST_ACTION_LOGO:
4121 case IBMVFC_HOST_ACTION_INIT:
4122 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4123 case IBMVFC_HOST_ACTION_TGT_DEL:
4124 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4125 case IBMVFC_HOST_ACTION_QUERY:
4134 * ibmvfc_work_to_do - Is there task level work to do?
4135 * @vhost: ibmvfc host struct
4138 * 1 if work to do / 0 if not
4140 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4142 unsigned long flags;
4145 spin_lock_irqsave(vhost->host->host_lock, flags);
4146 rc = __ibmvfc_work_to_do(vhost);
4147 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4152 * ibmvfc_log_ae - Log async events if necessary
4153 * @vhost: ibmvfc host struct
4154 * @events: events to log
4157 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4159 if (events & IBMVFC_AE_RSCN)
4160 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4161 if ((events & IBMVFC_AE_LINKDOWN) &&
4162 vhost->state >= IBMVFC_HALTED)
4163 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4164 if ((events & IBMVFC_AE_LINKUP) &&
4165 vhost->state == IBMVFC_INITIALIZING)
4166 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4170 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4171 * @tgt: ibmvfc target struct
4174 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4176 struct ibmvfc_host *vhost = tgt->vhost;
4177 struct fc_rport *rport;
4178 unsigned long flags;
4180 tgt_dbg(tgt, "Adding rport\n");
4181 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4182 spin_lock_irqsave(vhost->host->host_lock, flags);
4184 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4185 tgt_dbg(tgt, "Deleting rport\n");
4186 list_del(&tgt->queue);
4187 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4188 fc_remote_port_delete(rport);
4189 del_timer_sync(&tgt->timer);
4190 kref_put(&tgt->kref, ibmvfc_release_tgt);
4195 tgt_dbg(tgt, "rport add succeeded\n");
4197 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
4198 rport->supported_classes = 0;
4199 tgt->target_id = rport->scsi_target_id;
4200 if (tgt->service_parms.class1_parms[0] & 0x80000000)
4201 rport->supported_classes |= FC_COS_CLASS1;
4202 if (tgt->service_parms.class2_parms[0] & 0x80000000)
4203 rport->supported_classes |= FC_COS_CLASS2;
4204 if (tgt->service_parms.class3_parms[0] & 0x80000000)
4205 rport->supported_classes |= FC_COS_CLASS3;
4207 blk_queue_max_segments(rport->rqst_q, 1);
4209 tgt_dbg(tgt, "rport add failed\n");
4210 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4214 * ibmvfc_do_work - Do task level work
4215 * @vhost: ibmvfc host struct
4218 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4220 struct ibmvfc_target *tgt;
4221 unsigned long flags;
4222 struct fc_rport *rport;
4224 ibmvfc_log_ae(vhost, vhost->events_to_log);
4225 spin_lock_irqsave(vhost->host->host_lock, flags);
4226 vhost->events_to_log = 0;
4227 switch (vhost->action) {
4228 case IBMVFC_HOST_ACTION_NONE:
4229 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4230 case IBMVFC_HOST_ACTION_INIT_WAIT:
4232 case IBMVFC_HOST_ACTION_LOGO:
4233 vhost->job_step(vhost);
4235 case IBMVFC_HOST_ACTION_INIT:
4236 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
4237 if (vhost->delay_init) {
4238 vhost->delay_init = 0;
4239 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4243 vhost->job_step(vhost);
4245 case IBMVFC_HOST_ACTION_QUERY:
4246 list_for_each_entry(tgt, &vhost->targets, queue)
4247 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4248 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4250 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4251 list_for_each_entry(tgt, &vhost->targets, queue) {
4252 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4258 if (!ibmvfc_dev_init_to_do(vhost))
4259 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4261 case IBMVFC_HOST_ACTION_TGT_DEL:
4262 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4263 list_for_each_entry(tgt, &vhost->targets, queue) {
4264 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4265 tgt_dbg(tgt, "Deleting rport\n");
4268 list_del(&tgt->queue);
4269 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4271 fc_remote_port_delete(rport);
4272 del_timer_sync(&tgt->timer);
4273 kref_put(&tgt->kref, ibmvfc_release_tgt);
4278 if (vhost->state == IBMVFC_INITIALIZING) {
4279 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
4280 if (vhost->reinit) {
4282 scsi_block_requests(vhost->host);
4283 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4284 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4286 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4287 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4288 wake_up(&vhost->init_wait_q);
4289 schedule_work(&vhost->rport_add_work_q);
4290 vhost->init_retries = 0;
4291 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4292 scsi_unblock_requests(vhost->host);
4297 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4298 vhost->job_step = ibmvfc_discover_targets;
4301 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4302 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4303 scsi_unblock_requests(vhost->host);
4304 wake_up(&vhost->init_wait_q);
4308 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4309 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4310 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4311 ibmvfc_alloc_targets(vhost);
4312 spin_lock_irqsave(vhost->host->host_lock, flags);
4314 case IBMVFC_HOST_ACTION_TGT_INIT:
4315 list_for_each_entry(tgt, &vhost->targets, queue) {
4316 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4322 if (!ibmvfc_dev_init_to_do(vhost))
4323 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4329 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4333 * ibmvfc_work - Do task level work
4334 * @data: ibmvfc host struct
4339 static int ibmvfc_work(void *data)
4341 struct ibmvfc_host *vhost = data;
4344 set_user_nice(current, -20);
4347 rc = wait_event_interruptible(vhost->work_wait_q,
4348 ibmvfc_work_to_do(vhost));
4352 if (kthread_should_stop())
4355 ibmvfc_do_work(vhost);
4358 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4363 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4364 * @vhost: ibmvfc host struct
4366 * Allocates a page for messages, maps it for dma, and registers
4367 * the crq with the hypervisor.
4370 * zero on success / other on failure
4372 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4374 int rc, retrc = -ENOMEM;
4375 struct device *dev = vhost->dev;
4376 struct vio_dev *vdev = to_vio_dev(dev);
4377 struct ibmvfc_crq_queue *crq = &vhost->crq;
4380 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4385 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4386 crq->msg_token = dma_map_single(dev, crq->msgs,
4387 PAGE_SIZE, DMA_BIDIRECTIONAL);
4389 if (dma_mapping_error(dev, crq->msg_token))
4392 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4393 crq->msg_token, PAGE_SIZE);
4395 if (rc == H_RESOURCE)
4396 /* maybe kexecing and resource is busy. try a reset */
4397 retrc = rc = ibmvfc_reset_crq(vhost);
4400 dev_warn(dev, "Partner adapter not ready\n");
4402 dev_warn(dev, "Error %d opening adapter\n", rc);
4403 goto reg_crq_failed;
4408 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4410 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4411 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4412 goto req_irq_failed;
4415 if ((rc = vio_enable_interrupts(vdev))) {
4416 dev_err(dev, "Error %d enabling interrupts\n", rc);
4417 goto req_irq_failed;
4425 tasklet_kill(&vhost->tasklet);
4427 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4428 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4430 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4432 free_page((unsigned long)crq->msgs);
4437 * ibmvfc_free_mem - Free memory for vhost
4438 * @vhost: ibmvfc host struct
4443 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4445 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4448 mempool_destroy(vhost->tgt_pool);
4449 kfree(vhost->trace);
4450 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4451 vhost->disc_buf_dma);
4452 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4453 vhost->login_buf, vhost->login_buf_dma);
4454 dma_pool_destroy(vhost->sg_pool);
4455 dma_unmap_single(vhost->dev, async_q->msg_token,
4456 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4457 free_page((unsigned long)async_q->msgs);
4462 * ibmvfc_alloc_mem - Allocate memory for vhost
4463 * @vhost: ibmvfc host struct
4466 * 0 on success / non-zero on failure
4468 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4470 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4471 struct device *dev = vhost->dev;
4474 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4475 if (!async_q->msgs) {
4476 dev_err(dev, "Couldn't allocate async queue.\n");
4480 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4481 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4482 async_q->size * sizeof(*async_q->msgs),
4485 if (dma_mapping_error(dev, async_q->msg_token)) {
4486 dev_err(dev, "Failed to map async queue\n");
4487 goto free_async_crq;
4490 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4491 SG_ALL * sizeof(struct srp_direct_buf),
4492 sizeof(struct srp_direct_buf), 0);
4494 if (!vhost->sg_pool) {
4495 dev_err(dev, "Failed to allocate sg pool\n");
4496 goto unmap_async_crq;
4499 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4500 &vhost->login_buf_dma, GFP_KERNEL);
4502 if (!vhost->login_buf) {
4503 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4507 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4508 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4509 &vhost->disc_buf_dma, GFP_KERNEL);
4511 if (!vhost->disc_buf) {
4512 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4513 goto free_login_buffer;
4516 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4517 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4520 goto free_disc_buffer;
4522 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4523 sizeof(struct ibmvfc_target));
4525 if (!vhost->tgt_pool) {
4526 dev_err(dev, "Couldn't allocate target memory pool\n");
4534 kfree(vhost->trace);
4536 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4537 vhost->disc_buf_dma);
4539 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4540 vhost->login_buf, vhost->login_buf_dma);
4542 dma_pool_destroy(vhost->sg_pool);
4544 dma_unmap_single(dev, async_q->msg_token,
4545 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4547 free_page((unsigned long)async_q->msgs);
4554 * ibmvfc_rport_add_thread - Worker thread for rport adds
4555 * @work: work struct
4558 static void ibmvfc_rport_add_thread(struct work_struct *work)
4560 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4562 struct ibmvfc_target *tgt;
4563 struct fc_rport *rport;
4564 unsigned long flags;
4568 spin_lock_irqsave(vhost->host->host_lock, flags);
4571 if (vhost->state != IBMVFC_ACTIVE)
4574 list_for_each_entry(tgt, &vhost->targets, queue) {
4575 if (tgt->add_rport) {
4578 kref_get(&tgt->kref);
4581 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4582 ibmvfc_tgt_add_rport(tgt);
4583 } else if (get_device(&rport->dev)) {
4584 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4585 tgt_dbg(tgt, "Setting rport roles\n");
4586 fc_remote_port_rolechg(rport, tgt->ids.roles);
4587 put_device(&rport->dev);
4590 kref_put(&tgt->kref, ibmvfc_release_tgt);
4591 spin_lock_irqsave(vhost->host->host_lock, flags);
4597 if (vhost->state == IBMVFC_ACTIVE)
4598 vhost->scan_complete = 1;
4599 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4604 * ibmvfc_probe - Adapter hot plug add entry point
4605 * @vdev: vio device struct
4606 * @id: vio device id struct
4609 * 0 on success / non-zero on failure
4611 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4613 struct ibmvfc_host *vhost;
4614 struct Scsi_Host *shost;
4615 struct device *dev = &vdev->dev;
4619 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4621 dev_err(dev, "Couldn't allocate host data\n");
4625 shost->transportt = ibmvfc_transport_template;
4626 shost->can_queue = max_requests;
4627 shost->max_lun = max_lun;
4628 shost->max_id = max_targets;
4629 shost->max_sectors = IBMVFC_MAX_SECTORS;
4630 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4631 shost->unique_id = shost->host_no;
4633 vhost = shost_priv(shost);
4634 INIT_LIST_HEAD(&vhost->sent);
4635 INIT_LIST_HEAD(&vhost->free);
4636 INIT_LIST_HEAD(&vhost->targets);
4637 sprintf(vhost->name, IBMVFC_NAME);
4638 vhost->host = shost;
4640 vhost->partition_number = -1;
4641 vhost->log_level = log_level;
4642 vhost->task_set = 1;
4643 strcpy(vhost->partition_name, "UNKNOWN");
4644 init_waitqueue_head(&vhost->work_wait_q);
4645 init_waitqueue_head(&vhost->init_wait_q);
4646 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4647 mutex_init(&vhost->passthru_mutex);
4649 if ((rc = ibmvfc_alloc_mem(vhost)))
4650 goto free_scsi_host;
4652 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4655 if (IS_ERR(vhost->work_thread)) {
4656 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4657 PTR_ERR(vhost->work_thread));
4661 if ((rc = ibmvfc_init_crq(vhost))) {
4662 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4666 if ((rc = ibmvfc_init_event_pool(vhost))) {
4667 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4671 if ((rc = scsi_add_host(shost, dev)))
4672 goto release_event_pool;
4674 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4675 &ibmvfc_trace_attr))) {
4676 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4680 if (shost_to_fc_host(shost)->rqst_q)
4681 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
4682 dev_set_drvdata(dev, vhost);
4683 spin_lock(&ibmvfc_driver_lock);
4684 list_add_tail(&vhost->queue, &ibmvfc_head);
4685 spin_unlock(&ibmvfc_driver_lock);
4687 ibmvfc_send_crq_init(vhost);
4688 scsi_scan_host(shost);
4692 scsi_remove_host(shost);
4694 ibmvfc_free_event_pool(vhost);
4696 ibmvfc_release_crq_queue(vhost);
4698 kthread_stop(vhost->work_thread);
4700 ibmvfc_free_mem(vhost);
4702 scsi_host_put(shost);
4709 * ibmvfc_remove - Adapter hot plug remove entry point
4710 * @vdev: vio device struct
4715 static int ibmvfc_remove(struct vio_dev *vdev)
4717 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4718 unsigned long flags;
4721 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4723 spin_lock_irqsave(vhost->host->host_lock, flags);
4724 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4725 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4727 ibmvfc_wait_while_resetting(vhost);
4728 ibmvfc_release_crq_queue(vhost);
4729 kthread_stop(vhost->work_thread);
4730 fc_remove_host(vhost->host);
4731 scsi_remove_host(vhost->host);
4733 spin_lock_irqsave(vhost->host->host_lock, flags);
4734 ibmvfc_purge_requests(vhost, DID_ERROR);
4735 ibmvfc_free_event_pool(vhost);
4736 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4738 ibmvfc_free_mem(vhost);
4739 spin_lock(&ibmvfc_driver_lock);
4740 list_del(&vhost->queue);
4741 spin_unlock(&ibmvfc_driver_lock);
4742 scsi_host_put(vhost->host);
4748 * ibmvfc_resume - Resume from suspend
4749 * @dev: device struct
4751 * We may have lost an interrupt across suspend/resume, so kick the
4755 static int ibmvfc_resume(struct device *dev)
4757 unsigned long flags;
4758 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4759 struct vio_dev *vdev = to_vio_dev(dev);
4761 spin_lock_irqsave(vhost->host->host_lock, flags);
4762 vio_disable_interrupts(vdev);
4763 tasklet_schedule(&vhost->tasklet);
4764 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4769 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4770 * @vdev: vio device struct
4773 * Number of bytes the driver will need to DMA map at the same time in
4774 * order to perform well.
4776 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4778 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4779 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4782 static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4783 {"fcp", "IBM,vfc-client"},
4786 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4788 static struct dev_pm_ops ibmvfc_pm_ops = {
4789 .resume = ibmvfc_resume
4792 static struct vio_driver ibmvfc_driver = {
4793 .id_table = ibmvfc_device_table,
4794 .probe = ibmvfc_probe,
4795 .remove = ibmvfc_remove,
4796 .get_desired_dma = ibmvfc_get_desired_dma,
4798 .name = IBMVFC_NAME,
4799 .owner = THIS_MODULE,
4800 .pm = &ibmvfc_pm_ops,
4804 static struct fc_function_template ibmvfc_transport_functions = {
4805 .show_host_fabric_name = 1,
4806 .show_host_node_name = 1,
4807 .show_host_port_name = 1,
4808 .show_host_supported_classes = 1,
4809 .show_host_port_type = 1,
4810 .show_host_port_id = 1,
4811 .show_host_maxframe_size = 1,
4813 .get_host_port_state = ibmvfc_get_host_port_state,
4814 .show_host_port_state = 1,
4816 .get_host_speed = ibmvfc_get_host_speed,
4817 .show_host_speed = 1,
4819 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4820 .terminate_rport_io = ibmvfc_terminate_rport_io,
4822 .show_rport_maxframe_size = 1,
4823 .show_rport_supported_classes = 1,
4825 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4826 .show_rport_dev_loss_tmo = 1,
4828 .get_starget_node_name = ibmvfc_get_starget_node_name,
4829 .show_starget_node_name = 1,
4831 .get_starget_port_name = ibmvfc_get_starget_port_name,
4832 .show_starget_port_name = 1,
4834 .get_starget_port_id = ibmvfc_get_starget_port_id,
4835 .show_starget_port_id = 1,
4837 .bsg_request = ibmvfc_bsg_request,
4838 .bsg_timeout = ibmvfc_bsg_timeout,
4842 * ibmvfc_module_init - Initialize the ibmvfc module
4845 * 0 on success / other on failure
4847 static int __init ibmvfc_module_init(void)
4851 if (!firmware_has_feature(FW_FEATURE_VIO))
4854 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4855 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4857 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4858 if (!ibmvfc_transport_template)
4861 rc = vio_register_driver(&ibmvfc_driver);
4863 fc_release_transport(ibmvfc_transport_template);
4868 * ibmvfc_module_exit - Teardown the ibmvfc module
4873 static void __exit ibmvfc_module_exit(void)
4875 vio_unregister_driver(&ibmvfc_driver);
4876 fc_release_transport(ibmvfc_transport_template);
4879 module_init(ibmvfc_module_init);
4880 module_exit(ibmvfc_module_exit);