2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
32 #include <linux/stringify.h>
33 #include <asm/firmware.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_device.h>
40 #include <scsi/scsi_tcq.h>
41 #include <scsi/scsi_transport_fc.h>
44 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
45 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
46 static unsigned int max_lun = IBMVFC_MAX_LUN;
47 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
48 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
49 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
50 static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
51 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
52 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
53 static LIST_HEAD(ibmvfc_head);
54 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
55 static struct scsi_transport_template *ibmvfc_transport_template;
57 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
62 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
63 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
65 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
66 MODULE_PARM_DESC(default_timeout,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
69 module_param_named(max_requests, max_requests, uint, S_IRUGO);
70 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
72 module_param_named(max_lun, max_lun, uint, S_IRUGO);
73 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
75 module_param_named(max_targets, max_targets, uint, S_IRUGO);
76 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
78 module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR);
79 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
81 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
82 MODULE_PARM_DESC(debug, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG) "]");
84 module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
85 MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
89 module_param_named(log_level, log_level, uint, 0);
90 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
142 static void ibmvfc_npiv_login(struct ibmvfc_host *);
143 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
144 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
145 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
147 static const char *unknown_error = "unknown error";
149 #ifdef CONFIG_SCSI_IBMVFC_TRACE
151 * ibmvfc_trc_start - Log a start trace entry
152 * @evt: ibmvfc event struct
155 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
157 struct ibmvfc_host *vhost = evt->vhost;
158 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
159 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
160 struct ibmvfc_trace_entry *entry;
162 entry = &vhost->trace[vhost->trace_index++];
164 entry->time = jiffies;
165 entry->fmt = evt->crq.format;
166 entry->type = IBMVFC_TRC_START;
168 switch (entry->fmt) {
169 case IBMVFC_CMD_FORMAT:
170 entry->op_code = vfc_cmd->iu.cdb[0];
171 entry->scsi_id = vfc_cmd->tgt_scsi_id;
172 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
173 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
174 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
176 case IBMVFC_MAD_FORMAT:
177 entry->op_code = mad->opcode;
185 * ibmvfc_trc_end - Log an end trace entry
186 * @evt: ibmvfc event struct
189 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
191 struct ibmvfc_host *vhost = evt->vhost;
192 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
193 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
194 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
197 entry->time = jiffies;
198 entry->fmt = evt->crq.format;
199 entry->type = IBMVFC_TRC_END;
201 switch (entry->fmt) {
202 case IBMVFC_CMD_FORMAT:
203 entry->op_code = vfc_cmd->iu.cdb[0];
204 entry->scsi_id = vfc_cmd->tgt_scsi_id;
205 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
206 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
207 entry->u.end.status = vfc_cmd->status;
208 entry->u.end.error = vfc_cmd->error;
209 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
210 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
211 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
213 case IBMVFC_MAD_FORMAT:
214 entry->op_code = mad->opcode;
215 entry->u.end.status = mad->status;
224 #define ibmvfc_trc_start(evt) do { } while (0)
225 #define ibmvfc_trc_end(evt) do { } while (0)
229 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
230 * @status: status / error class
234 * index into cmd_status / -EINVAL on failure
236 static int ibmvfc_get_err_index(u16 status, u16 error)
240 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
241 if ((cmd_status[i].status & status) == cmd_status[i].status &&
242 cmd_status[i].error == error)
249 * ibmvfc_get_cmd_error - Find the error description for the fcp response
250 * @status: status / error class
254 * error description string
256 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
258 int rc = ibmvfc_get_err_index(status, error);
260 return cmd_status[rc].name;
261 return unknown_error;
265 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
266 * @vfc_cmd: ibmvfc command struct
269 * SCSI result value to return for completed command
271 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
274 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
275 int fc_rsp_len = rsp->fcp_rsp_len;
277 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
278 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
279 rsp->data.info.rsp_code))
280 return DID_ERROR << 16;
282 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
284 return rsp->scsi_status | (cmd_status[err].result << 16);
285 return rsp->scsi_status | (DID_ERROR << 16);
289 * ibmvfc_retry_cmd - Determine if error status is retryable
290 * @status: status / error class
294 * 1 if error should be retried / 0 if it should not
296 static int ibmvfc_retry_cmd(u16 status, u16 error)
298 int rc = ibmvfc_get_err_index(status, error);
301 return cmd_status[rc].retry;
305 static const char *unknown_fc_explain = "unknown fc explain";
307 static const struct {
311 { 0x00, "no additional explanation" },
312 { 0x01, "service parameter error - options" },
313 { 0x03, "service parameter error - initiator control" },
314 { 0x05, "service parameter error - recipient control" },
315 { 0x07, "service parameter error - received data field size" },
316 { 0x09, "service parameter error - concurrent seq" },
317 { 0x0B, "service parameter error - credit" },
318 { 0x0D, "invalid N_Port/F_Port_Name" },
319 { 0x0E, "invalid node/Fabric Name" },
320 { 0x0F, "invalid common service parameters" },
321 { 0x11, "invalid association header" },
322 { 0x13, "association header required" },
323 { 0x15, "invalid originator S_ID" },
324 { 0x17, "invalid OX_ID-RX-ID combination" },
325 { 0x19, "command (request) already in progress" },
326 { 0x1E, "N_Port Login requested" },
327 { 0x1F, "Invalid N_Port_ID" },
330 static const struct {
334 { 0x00, "no additional explanation" },
335 { 0x01, "port identifier not registered" },
336 { 0x02, "port name not registered" },
337 { 0x03, "node name not registered" },
338 { 0x04, "class of service not registered" },
339 { 0x06, "initial process associator not registered" },
340 { 0x07, "FC-4 TYPEs not registered" },
341 { 0x08, "symbolic port name not registered" },
342 { 0x09, "symbolic node name not registered" },
343 { 0x0A, "port type not registered" },
344 { 0xF0, "authorization exception" },
345 { 0xF1, "authentication exception" },
346 { 0xF2, "data base full" },
347 { 0xF3, "data base empty" },
348 { 0xF4, "processing request" },
349 { 0xF5, "unable to verify connection" },
350 { 0xF6, "devices not in a common zone" },
354 * ibmvfc_get_ls_explain - Return the FC Explain description text
355 * @status: FC Explain status
360 static const char *ibmvfc_get_ls_explain(u16 status)
364 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
365 if (ls_explain[i].fc_explain == status)
366 return ls_explain[i].name;
368 return unknown_fc_explain;
372 * ibmvfc_get_gs_explain - Return the FC Explain description text
373 * @status: FC Explain status
378 static const char *ibmvfc_get_gs_explain(u16 status)
382 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
383 if (gs_explain[i].fc_explain == status)
384 return gs_explain[i].name;
386 return unknown_fc_explain;
389 static const struct {
390 enum ibmvfc_fc_type fc_type;
393 { IBMVFC_FABRIC_REJECT, "fabric reject" },
394 { IBMVFC_PORT_REJECT, "port reject" },
395 { IBMVFC_LS_REJECT, "ELS reject" },
396 { IBMVFC_FABRIC_BUSY, "fabric busy" },
397 { IBMVFC_PORT_BUSY, "port busy" },
398 { IBMVFC_BASIC_REJECT, "basic reject" },
401 static const char *unknown_fc_type = "unknown fc type";
404 * ibmvfc_get_fc_type - Return the FC Type description text
405 * @status: FC Type error status
410 static const char *ibmvfc_get_fc_type(u16 status)
414 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
415 if (fc_type[i].fc_type == status)
416 return fc_type[i].name;
418 return unknown_fc_type;
422 * ibmvfc_set_tgt_action - Set the next init action for the target
423 * @tgt: ibmvfc target struct
424 * @action: action to perform
427 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
428 enum ibmvfc_target_action action)
430 switch (tgt->action) {
431 case IBMVFC_TGT_ACTION_DEL_RPORT:
434 tgt->action = action;
440 * ibmvfc_set_host_state - Set the state for the host
441 * @vhost: ibmvfc host struct
442 * @state: state to set host to
445 * 0 if state changed / non-zero if not changed
447 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
448 enum ibmvfc_host_state state)
452 switch (vhost->state) {
453 case IBMVFC_HOST_OFFLINE:
457 vhost->state = state;
465 * ibmvfc_set_host_action - Set the next init action for the host
466 * @vhost: ibmvfc host struct
467 * @action: action to perform
470 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
471 enum ibmvfc_host_action action)
474 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
475 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
476 vhost->action = action;
478 case IBMVFC_HOST_ACTION_INIT_WAIT:
479 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
480 vhost->action = action;
482 case IBMVFC_HOST_ACTION_QUERY:
483 switch (vhost->action) {
484 case IBMVFC_HOST_ACTION_INIT_WAIT:
485 case IBMVFC_HOST_ACTION_NONE:
486 case IBMVFC_HOST_ACTION_TGT_ADD:
487 vhost->action = action;
493 case IBMVFC_HOST_ACTION_TGT_INIT:
494 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
495 vhost->action = action;
497 case IBMVFC_HOST_ACTION_INIT:
498 case IBMVFC_HOST_ACTION_TGT_DEL:
499 case IBMVFC_HOST_ACTION_QUERY_TGTS:
500 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
501 case IBMVFC_HOST_ACTION_TGT_ADD:
502 case IBMVFC_HOST_ACTION_NONE:
504 vhost->action = action;
510 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
511 * @vhost: ibmvfc host struct
516 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
518 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
519 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
520 scsi_block_requests(vhost->host);
521 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
526 wake_up(&vhost->work_wait_q);
530 * ibmvfc_link_down - Handle a link down event from the adapter
531 * @vhost: ibmvfc host struct
532 * @state: ibmvfc host state to enter
535 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
536 enum ibmvfc_host_state state)
538 struct ibmvfc_target *tgt;
541 scsi_block_requests(vhost->host);
542 list_for_each_entry(tgt, &vhost->targets, queue)
543 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
544 ibmvfc_set_host_state(vhost, state);
545 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
546 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
547 wake_up(&vhost->work_wait_q);
552 * ibmvfc_init_host - Start host initialization
553 * @vhost: ibmvfc host struct
554 * @relogin: is this a re-login?
559 static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
561 struct ibmvfc_target *tgt;
563 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
564 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
566 "Host initialization retries exceeded. Taking adapter offline\n");
567 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
572 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
574 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
575 vhost->async_crq.cur = 0;
578 list_for_each_entry(tgt, &vhost->targets, queue)
580 scsi_block_requests(vhost->host);
581 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
582 vhost->job_step = ibmvfc_npiv_login;
583 wake_up(&vhost->work_wait_q);
588 * ibmvfc_send_crq - Send a CRQ
589 * @vhost: ibmvfc host struct
590 * @word1: the first 64 bits of the data
591 * @word2: the second 64 bits of the data
594 * 0 on success / other on failure
596 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
598 struct vio_dev *vdev = to_vio_dev(vhost->dev);
599 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
603 * ibmvfc_send_crq_init - Send a CRQ init message
604 * @vhost: ibmvfc host struct
607 * 0 on success / other on failure
609 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
611 ibmvfc_dbg(vhost, "Sending CRQ init\n");
612 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
616 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
617 * @vhost: ibmvfc host struct
620 * 0 on success / other on failure
622 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
624 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
625 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
629 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
630 * @vhost: ibmvfc host struct
632 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
633 * the crq with the hypervisor.
635 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
638 struct vio_dev *vdev = to_vio_dev(vhost->dev);
639 struct ibmvfc_crq_queue *crq = &vhost->crq;
641 ibmvfc_dbg(vhost, "Releasing CRQ\n");
642 free_irq(vdev->irq, vhost);
644 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
645 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
647 vhost->state = IBMVFC_NO_CRQ;
648 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
649 free_page((unsigned long)crq->msgs);
653 * ibmvfc_reenable_crq_queue - reenables the CRQ
654 * @vhost: ibmvfc host struct
657 * 0 on success / other on failure
659 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
662 struct vio_dev *vdev = to_vio_dev(vhost->dev);
664 /* Re-enable the CRQ */
666 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
667 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
670 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
676 * ibmvfc_reset_crq - resets a crq after a failure
677 * @vhost: ibmvfc host struct
680 * 0 on success / other on failure
682 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
685 struct vio_dev *vdev = to_vio_dev(vhost->dev);
686 struct ibmvfc_crq_queue *crq = &vhost->crq;
690 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
691 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
693 vhost->state = IBMVFC_NO_CRQ;
694 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
696 /* Clean out the queue */
697 memset(crq->msgs, 0, PAGE_SIZE);
700 /* And re-open it again */
701 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
702 crq->msg_token, PAGE_SIZE);
705 /* Adapter is good, but other end is not ready */
706 dev_warn(vhost->dev, "Partner adapter not ready\n");
708 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
714 * ibmvfc_valid_event - Determines if event is valid.
715 * @pool: event_pool that contains the event
716 * @evt: ibmvfc event to be checked for validity
719 * 1 if event is valid / 0 if event is not valid
721 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
722 struct ibmvfc_event *evt)
724 int index = evt - pool->events;
725 if (index < 0 || index >= pool->size) /* outside of bounds */
727 if (evt != pool->events + index) /* unaligned */
733 * ibmvfc_free_event - Free the specified event
734 * @evt: ibmvfc_event to be freed
737 static void ibmvfc_free_event(struct ibmvfc_event *evt)
739 struct ibmvfc_host *vhost = evt->vhost;
740 struct ibmvfc_event_pool *pool = &vhost->pool;
742 BUG_ON(!ibmvfc_valid_event(pool, evt));
743 BUG_ON(atomic_inc_return(&evt->free) != 1);
744 list_add_tail(&evt->queue, &vhost->free);
748 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
749 * @evt: ibmvfc event struct
751 * This function does not setup any error status, that must be done
752 * before this function gets called.
754 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
756 struct scsi_cmnd *cmnd = evt->cmnd;
759 scsi_dma_unmap(cmnd);
760 cmnd->scsi_done(cmnd);
764 complete(evt->eh_comp);
766 ibmvfc_free_event(evt);
770 * ibmvfc_fail_request - Fail request with specified error code
771 * @evt: ibmvfc event struct
772 * @error_code: error code to fail request with
777 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
780 evt->cmnd->result = (error_code << 16);
781 evt->done = ibmvfc_scsi_eh_done;
783 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
785 list_del(&evt->queue);
786 del_timer(&evt->timer);
792 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
793 * @vhost: ibmvfc host struct
794 * @error_code: error code to fail requests with
799 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
801 struct ibmvfc_event *evt, *pos;
803 ibmvfc_dbg(vhost, "Purging all requests\n");
804 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
805 ibmvfc_fail_request(evt, error_code);
809 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
810 * @vhost: struct ibmvfc host to reset
812 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
816 scsi_block_requests(vhost->host);
817 ibmvfc_purge_requests(vhost, DID_ERROR);
818 if ((rc = ibmvfc_reset_crq(vhost)) ||
819 (rc = ibmvfc_send_crq_init(vhost)) ||
820 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
821 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
822 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
824 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
828 * ibmvfc_reset_host - Reset the connection to the server
829 * @vhost: struct ibmvfc host to reset
831 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
835 spin_lock_irqsave(vhost->host->host_lock, flags);
836 __ibmvfc_reset_host(vhost);
837 spin_unlock_irqrestore(vhost->host->host_lock, flags);
841 * ibmvfc_retry_host_init - Retry host initialization if allowed
842 * @vhost: ibmvfc host struct
845 static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
847 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
848 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
850 "Host initialization retries exceeded. Taking adapter offline\n");
851 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
852 } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES)
853 __ibmvfc_reset_host(vhost);
855 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
858 wake_up(&vhost->work_wait_q);
862 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
863 * @starget: scsi target struct
866 * ibmvfc_target struct / NULL if not found
868 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
870 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
871 struct ibmvfc_host *vhost = shost_priv(shost);
872 struct ibmvfc_target *tgt;
874 list_for_each_entry(tgt, &vhost->targets, queue)
875 if (tgt->target_id == starget->id) {
876 kref_get(&tgt->kref);
883 * ibmvfc_get_target - Find the specified scsi_target
884 * @starget: scsi target struct
887 * ibmvfc_target struct / NULL if not found
889 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
891 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
892 struct ibmvfc_target *tgt;
895 spin_lock_irqsave(shost->host_lock, flags);
896 tgt = __ibmvfc_get_target(starget);
897 spin_unlock_irqrestore(shost->host_lock, flags);
902 * ibmvfc_get_host_speed - Get host port speed
903 * @shost: scsi host struct
908 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
910 struct ibmvfc_host *vhost = shost_priv(shost);
913 spin_lock_irqsave(shost->host_lock, flags);
914 if (vhost->state == IBMVFC_ACTIVE) {
915 switch (vhost->login_buf->resp.link_speed / 100) {
917 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
920 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
923 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
926 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
929 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
932 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
935 ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n",
936 vhost->login_buf->resp.link_speed / 100);
937 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
941 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
942 spin_unlock_irqrestore(shost->host_lock, flags);
946 * ibmvfc_get_host_port_state - Get host port state
947 * @shost: scsi host struct
952 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
954 struct ibmvfc_host *vhost = shost_priv(shost);
957 spin_lock_irqsave(shost->host_lock, flags);
958 switch (vhost->state) {
959 case IBMVFC_INITIALIZING:
961 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
963 case IBMVFC_LINK_DOWN:
964 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
966 case IBMVFC_LINK_DEAD:
967 case IBMVFC_HOST_OFFLINE:
968 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
971 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
974 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
977 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
978 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
981 spin_unlock_irqrestore(shost->host_lock, flags);
985 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
986 * @rport: rport struct
987 * @timeout: timeout value
992 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
995 rport->dev_loss_tmo = timeout;
997 rport->dev_loss_tmo = 1;
1001 * ibmvfc_release_tgt - Free memory allocated for a target
1002 * @kref: kref struct
1005 static void ibmvfc_release_tgt(struct kref *kref)
1007 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1012 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1013 * @starget: scsi target struct
1018 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1020 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1021 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1023 kref_put(&tgt->kref, ibmvfc_release_tgt);
1027 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1028 * @starget: scsi target struct
1033 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1035 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1036 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1038 kref_put(&tgt->kref, ibmvfc_release_tgt);
1042 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1043 * @starget: scsi target struct
1048 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1050 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1051 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1053 kref_put(&tgt->kref, ibmvfc_release_tgt);
1057 * ibmvfc_wait_while_resetting - Wait while the host resets
1058 * @vhost: ibmvfc host struct
1061 * 0 on success / other on failure
1063 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1065 long timeout = wait_event_timeout(vhost->init_wait_q,
1066 ((vhost->state == IBMVFC_ACTIVE ||
1067 vhost->state == IBMVFC_HOST_OFFLINE ||
1068 vhost->state == IBMVFC_LINK_DEAD) &&
1069 vhost->action == IBMVFC_HOST_ACTION_NONE),
1070 (init_timeout * HZ));
1072 return timeout ? 0 : -EIO;
1076 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1077 * @shost: scsi host struct
1080 * 0 on success / other on failure
1082 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1084 struct ibmvfc_host *vhost = shost_priv(shost);
1086 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1087 ibmvfc_reset_host(vhost);
1088 return ibmvfc_wait_while_resetting(vhost);
1092 * ibmvfc_gather_partition_info - Gather info about the LPAR
1097 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1099 struct device_node *rootdn;
1101 const unsigned int *num;
1103 rootdn = of_find_node_by_path("/");
1107 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1109 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1110 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1112 vhost->partition_number = *num;
1113 of_node_put(rootdn);
1117 * ibmvfc_set_login_info - Setup info for NPIV login
1118 * @vhost: ibmvfc host struct
1123 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1125 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1126 struct device_node *of_node = vhost->dev->archdata.of_node;
1127 const char *location;
1129 memset(login_info, 0, sizeof(*login_info));
1131 login_info->ostype = IBMVFC_OS_LINUX;
1132 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1133 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1134 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1135 login_info->partition_num = vhost->partition_number;
1136 login_info->vfc_frame_version = 1;
1137 login_info->fcp_version = 3;
1138 if (vhost->client_migrated)
1139 login_info->flags = IBMVFC_CLIENT_MIGRATED;
1141 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1142 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1143 login_info->async.va = vhost->async_crq.msg_token;
1144 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
1145 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1146 strncpy(login_info->device_name,
1147 vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME);
1149 location = of_get_property(of_node, "ibm,loc-code", NULL);
1150 location = location ? location : vhost->dev->bus_id;
1151 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1155 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1156 * @vhost: ibmvfc host who owns the event pool
1158 * Returns zero on success.
1160 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1163 struct ibmvfc_event_pool *pool = &vhost->pool;
1166 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1167 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1171 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1172 pool->size * sizeof(*pool->iu_storage),
1173 &pool->iu_token, 0);
1175 if (!pool->iu_storage) {
1176 kfree(pool->events);
1180 for (i = 0; i < pool->size; ++i) {
1181 struct ibmvfc_event *evt = &pool->events[i];
1182 atomic_set(&evt->free, 1);
1183 evt->crq.valid = 0x80;
1184 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1185 evt->xfer_iu = pool->iu_storage + i;
1187 evt->ext_list = NULL;
1188 list_add_tail(&evt->queue, &vhost->free);
1196 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1197 * @vhost: ibmvfc host who owns the event pool
1200 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1203 struct ibmvfc_event_pool *pool = &vhost->pool;
1206 for (i = 0; i < pool->size; ++i) {
1207 list_del(&pool->events[i].queue);
1208 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1209 if (pool->events[i].ext_list)
1210 dma_pool_free(vhost->sg_pool,
1211 pool->events[i].ext_list,
1212 pool->events[i].ext_list_token);
1215 kfree(pool->events);
1216 dma_free_coherent(vhost->dev,
1217 pool->size * sizeof(*pool->iu_storage),
1218 pool->iu_storage, pool->iu_token);
1223 * ibmvfc_get_event - Gets the next free event in pool
1224 * @vhost: ibmvfc host struct
1226 * Returns a free event from the pool.
1228 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1230 struct ibmvfc_event *evt;
1232 BUG_ON(list_empty(&vhost->free));
1233 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1234 atomic_set(&evt->free, 0);
1235 list_del(&evt->queue);
1240 * ibmvfc_init_event - Initialize fields in an event struct that are always
1243 * @done: Routine to call when the event is responded to
1244 * @format: SRP or MAD format
1246 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1247 void (*done) (struct ibmvfc_event *), u8 format)
1250 evt->sync_iu = NULL;
1251 evt->crq.format = format;
1253 evt->eh_comp = NULL;
1257 * ibmvfc_map_sg_list - Initialize scatterlist
1258 * @scmd: scsi command struct
1259 * @nseg: number of scatterlist segments
1260 * @md: memory descriptor list to initialize
1262 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1263 struct srp_direct_buf *md)
1266 struct scatterlist *sg;
1268 scsi_for_each_sg(scmd, sg, nseg, i) {
1269 md[i].va = sg_dma_address(sg);
1270 md[i].len = sg_dma_len(sg);
1276 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1277 * @scmd: Scsi_Cmnd with the scatterlist
1278 * @evt: ibmvfc event struct
1279 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1280 * @dev: device for which to map dma memory
1283 * 0 on success / non-zero on failure
1285 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1286 struct ibmvfc_event *evt,
1287 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1291 struct srp_direct_buf *data = &vfc_cmd->ioba;
1292 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1294 sg_mapped = scsi_dma_map(scmd);
1296 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1298 } else if (unlikely(sg_mapped < 0)) {
1299 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1300 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1304 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1305 vfc_cmd->flags |= IBMVFC_WRITE;
1306 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1308 vfc_cmd->flags |= IBMVFC_READ;
1309 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1312 if (sg_mapped == 1) {
1313 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1317 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1319 if (!evt->ext_list) {
1320 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1321 &evt->ext_list_token);
1323 if (!evt->ext_list) {
1324 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1329 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1331 data->va = evt->ext_list_token;
1332 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1338 * ibmvfc_timeout - Internal command timeout handler
1339 * @evt: struct ibmvfc_event that timed out
1341 * Called when an internally generated command times out
1343 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1345 struct ibmvfc_host *vhost = evt->vhost;
1346 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1347 ibmvfc_reset_host(vhost);
1351 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1352 * @evt: event to be sent
1353 * @vhost: ibmvfc host struct
1354 * @timeout: timeout in seconds - 0 means do not time command
1356 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1358 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1359 struct ibmvfc_host *vhost, unsigned long timeout)
1361 u64 *crq_as_u64 = (u64 *) &evt->crq;
1364 /* Copy the IU into the transfer area */
1365 *evt->xfer_iu = evt->iu;
1366 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1367 evt->xfer_iu->cmd.tag = (u64)evt;
1368 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1369 evt->xfer_iu->mad_common.tag = (u64)evt;
1373 list_add_tail(&evt->queue, &vhost->sent);
1374 init_timer(&evt->timer);
1377 evt->timer.data = (unsigned long) evt;
1378 evt->timer.expires = jiffies + (timeout * HZ);
1379 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1380 add_timer(&evt->timer);
1383 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1384 list_del(&evt->queue);
1385 del_timer(&evt->timer);
1387 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1388 * Firmware will send a CRQ with a transport event (0xFF) to
1389 * tell this client what has happened to the transport. This
1390 * will be handled in ibmvfc_handle_crq()
1392 if (rc == H_CLOSED) {
1393 if (printk_ratelimit())
1394 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1396 scsi_dma_unmap(evt->cmnd);
1397 ibmvfc_free_event(evt);
1398 return SCSI_MLQUEUE_HOST_BUSY;
1401 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1403 evt->cmnd->result = DID_ERROR << 16;
1404 evt->done = ibmvfc_scsi_eh_done;
1406 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1410 ibmvfc_trc_start(evt);
1416 * ibmvfc_log_error - Log an error for the failed command if appropriate
1417 * @evt: ibmvfc event to log
1420 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1422 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1423 struct ibmvfc_host *vhost = evt->vhost;
1424 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1425 struct scsi_cmnd *cmnd = evt->cmnd;
1426 const char *err = unknown_error;
1427 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1432 logerr = cmd_status[index].log;
1433 err = cmd_status[index].name;
1436 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1439 if (rsp->flags & FCP_RSP_LEN_VALID)
1440 rsp_code = rsp->data.info.rsp_code;
1442 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1443 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1444 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1445 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1449 * ibmvfc_scsi_done - Handle responses from commands
1450 * @evt: ibmvfc event to be handled
1452 * Used as a callback when sending scsi cmds.
1454 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1456 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1457 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1458 struct scsi_cmnd *cmnd = evt->cmnd;
1460 u32 sense_len = rsp->fcp_sense_len;
1463 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1464 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1465 else if (rsp->flags & FCP_RESID_UNDER)
1466 scsi_set_resid(cmnd, rsp->fcp_resid);
1468 scsi_set_resid(cmnd, 0);
1470 if (vfc_cmd->status) {
1471 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1473 if (rsp->flags & FCP_RSP_LEN_VALID)
1474 rsp_len = rsp->fcp_rsp_len;
1475 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1476 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1477 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1478 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1479 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
1480 ibmvfc_reinit_host(evt->vhost);
1482 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1483 cmnd->result = (DID_ERROR << 16);
1485 ibmvfc_log_error(evt);
1488 if (!cmnd->result &&
1489 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1490 cmnd->result = (DID_ERROR << 16);
1492 scsi_dma_unmap(cmnd);
1493 cmnd->scsi_done(cmnd);
1497 complete(evt->eh_comp);
1499 ibmvfc_free_event(evt);
1503 * ibmvfc_host_chkready - Check if the host can accept commands
1504 * @vhost: struct ibmvfc host
1507 * 1 if host can accept command / 0 if not
1509 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1513 switch (vhost->state) {
1514 case IBMVFC_LINK_DEAD:
1515 case IBMVFC_HOST_OFFLINE:
1516 result = DID_NO_CONNECT << 16;
1519 case IBMVFC_INITIALIZING:
1521 case IBMVFC_LINK_DOWN:
1522 result = DID_REQUEUE << 16;
1533 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1534 * @cmnd: struct scsi_cmnd to be executed
1535 * @done: Callback function to be called when cmnd is completed
1538 * 0 on success / other on failure
1540 static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1541 void (*done) (struct scsi_cmnd *))
1543 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1544 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1545 struct ibmvfc_cmd *vfc_cmd;
1546 struct ibmvfc_event *evt;
1550 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1551 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1557 cmnd->result = (DID_OK << 16);
1558 evt = ibmvfc_get_event(vhost);
1559 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1561 cmnd->scsi_done = done;
1562 vfc_cmd = &evt->iu.cmd;
1563 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1564 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1565 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1566 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1567 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1568 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1569 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1570 vfc_cmd->tgt_scsi_id = rport->port_id;
1571 if ((rport->supported_classes & FC_COS_CLASS3) &&
1572 (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3))
1573 vfc_cmd->flags = IBMVFC_CLASS_3_ERR;
1574 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1575 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1576 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1578 if (scsi_populate_tag_msg(cmnd, tag)) {
1579 vfc_cmd->task_tag = tag[1];
1581 case MSG_SIMPLE_TAG:
1582 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1585 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1587 case MSG_ORDERED_TAG:
1588 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1593 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1594 return ibmvfc_send_event(evt, vhost, 0);
1596 ibmvfc_free_event(evt);
1598 return SCSI_MLQUEUE_HOST_BUSY;
1600 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1601 scmd_printk(KERN_ERR, cmnd,
1602 "Failed to map DMA buffer for command. rc=%d\n", rc);
1604 cmnd->result = DID_ERROR << 16;
1610 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1611 * @evt: ibmvfc event struct
1614 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1616 /* copy the response back */
1618 *evt->sync_iu = *evt->xfer_iu;
1620 complete(&evt->comp);
1624 * ibmvfc_reset_device - Reset the device with the specified reset type
1625 * @sdev: scsi device to reset
1627 * @desc: reset type description for log messages
1630 * 0 on success / other on failure
1632 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1634 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1635 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1636 struct ibmvfc_cmd *tmf;
1637 struct ibmvfc_event *evt = NULL;
1638 union ibmvfc_iu rsp_iu;
1639 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1640 int rsp_rc = -EBUSY;
1641 unsigned long flags;
1644 spin_lock_irqsave(vhost->host->host_lock, flags);
1645 if (vhost->state == IBMVFC_ACTIVE) {
1646 evt = ibmvfc_get_event(vhost);
1647 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1650 memset(tmf, 0, sizeof(*tmf));
1651 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1652 tmf->resp.len = sizeof(tmf->rsp);
1653 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1654 tmf->payload_len = sizeof(tmf->iu);
1655 tmf->resp_len = sizeof(tmf->rsp);
1656 tmf->cancel_key = (unsigned long)sdev->hostdata;
1657 tmf->tgt_scsi_id = rport->port_id;
1658 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1659 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1660 tmf->iu.tmf_flags = type;
1661 evt->sync_iu = &rsp_iu;
1663 init_completion(&evt->comp);
1664 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1666 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1669 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1674 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1675 wait_for_completion(&evt->comp);
1677 if (rsp_iu.cmd.status) {
1678 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1679 rsp_code = fc_rsp->data.info.rsp_code;
1681 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1682 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1683 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1684 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1685 fc_rsp->scsi_status);
1688 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1690 spin_lock_irqsave(vhost->host->host_lock, flags);
1691 ibmvfc_free_event(evt);
1692 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1697 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1698 * @sdev: scsi device to abort commands
1700 * This sends an Abort Task Set to the VIOS for the specified device. This does
1701 * NOT send any cancel to the VIOS. That must be done separately.
1704 * 0 on success / other on failure
1706 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1708 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1709 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1710 struct ibmvfc_cmd *tmf;
1711 struct ibmvfc_event *evt, *found_evt;
1712 union ibmvfc_iu rsp_iu;
1713 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1714 int rsp_rc = -EBUSY;
1715 unsigned long flags;
1718 spin_lock_irqsave(vhost->host->host_lock, flags);
1720 list_for_each_entry(evt, &vhost->sent, queue) {
1721 if (evt->cmnd && evt->cmnd->device == sdev) {
1728 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1729 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1730 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1734 if (vhost->state == IBMVFC_ACTIVE) {
1735 evt = ibmvfc_get_event(vhost);
1736 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1739 memset(tmf, 0, sizeof(*tmf));
1740 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1741 tmf->resp.len = sizeof(tmf->rsp);
1742 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1743 tmf->payload_len = sizeof(tmf->iu);
1744 tmf->resp_len = sizeof(tmf->rsp);
1745 tmf->cancel_key = (unsigned long)sdev->hostdata;
1746 tmf->tgt_scsi_id = rport->port_id;
1747 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1748 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1749 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1750 evt->sync_iu = &rsp_iu;
1752 init_completion(&evt->comp);
1753 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1756 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1759 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1763 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1764 wait_for_completion(&evt->comp);
1766 if (rsp_iu.cmd.status) {
1767 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1768 rsp_code = fc_rsp->data.info.rsp_code;
1770 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1771 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1772 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1773 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1774 fc_rsp->scsi_status);
1777 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1779 spin_lock_irqsave(vhost->host->host_lock, flags);
1780 ibmvfc_free_event(evt);
1781 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1786 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1787 * @sdev: scsi device to cancel commands
1788 * @type: type of error recovery being performed
1790 * This sends a cancel to the VIOS for the specified device. This does
1791 * NOT send any abort to the actual device. That must be done separately.
1794 * 0 on success / other on failure
1796 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1798 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1799 struct scsi_target *starget = scsi_target(sdev);
1800 struct fc_rport *rport = starget_to_rport(starget);
1801 struct ibmvfc_tmf *tmf;
1802 struct ibmvfc_event *evt, *found_evt;
1803 union ibmvfc_iu rsp;
1804 int rsp_rc = -EBUSY;
1805 unsigned long flags;
1809 spin_lock_irqsave(vhost->host->host_lock, flags);
1811 list_for_each_entry(evt, &vhost->sent, queue) {
1812 if (evt->cmnd && evt->cmnd->device == sdev) {
1819 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1820 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1821 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1825 if (vhost->state == IBMVFC_ACTIVE) {
1826 evt = ibmvfc_get_event(vhost);
1827 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1830 memset(tmf, 0, sizeof(*tmf));
1831 tmf->common.version = 1;
1832 tmf->common.opcode = IBMVFC_TMF_MAD;
1833 tmf->common.length = sizeof(*tmf);
1834 tmf->scsi_id = rport->port_id;
1835 int_to_scsilun(sdev->lun, &tmf->lun);
1836 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1837 tmf->cancel_key = (unsigned long)sdev->hostdata;
1838 tmf->my_cancel_key = (unsigned long)starget->hostdata;
1840 evt->sync_iu = &rsp;
1841 init_completion(&evt->comp);
1842 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1845 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1848 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1852 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1854 wait_for_completion(&evt->comp);
1855 status = rsp.mad_common.status;
1856 spin_lock_irqsave(vhost->host->host_lock, flags);
1857 ibmvfc_free_event(evt);
1858 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1860 if (status != IBMVFC_MAD_SUCCESS) {
1861 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1865 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1870 * ibmvfc_match_target - Match function for specified target
1871 * @evt: ibmvfc event struct
1872 * @device: device to match (starget)
1875 * 1 if event matches starget / 0 if event does not match starget
1877 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
1879 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
1885 * ibmvfc_match_lun - Match function for specified LUN
1886 * @evt: ibmvfc event struct
1887 * @device: device to match (sdev)
1890 * 1 if event matches sdev / 0 if event does not match sdev
1892 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
1894 if (evt->cmnd && evt->cmnd->device == device)
1900 * ibmvfc_wait_for_ops - Wait for ops to complete
1901 * @vhost: ibmvfc host struct
1902 * @device: device to match (starget or sdev)
1903 * @match: match function
1908 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
1909 int (*match) (struct ibmvfc_event *, void *))
1911 struct ibmvfc_event *evt;
1912 DECLARE_COMPLETION_ONSTACK(comp);
1914 unsigned long flags;
1915 signed long timeout = init_timeout * HZ;
1920 spin_lock_irqsave(vhost->host->host_lock, flags);
1921 list_for_each_entry(evt, &vhost->sent, queue) {
1922 if (match(evt, device)) {
1923 evt->eh_comp = ∁
1927 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1930 timeout = wait_for_completion_timeout(&comp, timeout);
1934 spin_lock_irqsave(vhost->host->host_lock, flags);
1935 list_for_each_entry(evt, &vhost->sent, queue) {
1936 if (match(evt, device)) {
1937 evt->eh_comp = NULL;
1941 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1943 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
1945 return wait ? FAILED : SUCCESS;
1955 * ibmvfc_eh_abort_handler - Abort a command
1956 * @cmd: scsi command to abort
1961 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
1963 struct scsi_device *sdev = cmd->device;
1964 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1965 int cancel_rc, abort_rc;
1969 ibmvfc_wait_while_resetting(vhost);
1970 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
1971 abort_rc = ibmvfc_abort_task_set(sdev);
1973 if (!cancel_rc && !abort_rc)
1974 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
1981 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1982 * @cmd: scsi command struct
1987 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
1989 struct scsi_device *sdev = cmd->device;
1990 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1991 int cancel_rc, reset_rc;
1995 ibmvfc_wait_while_resetting(vhost);
1996 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
1997 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
1999 if (!cancel_rc && !reset_rc)
2000 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2007 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2008 * @sdev: scsi device struct
2009 * @data: return code
2012 static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
2014 unsigned long *rc = data;
2015 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2019 * ibmvfc_dev_abort_all - Device iterated abort task set function
2020 * @sdev: scsi device struct
2021 * @data: return code
2024 static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2026 unsigned long *rc = data;
2027 *rc |= ibmvfc_abort_task_set(sdev);
2031 * ibmvfc_eh_target_reset_handler - Reset the target
2032 * @cmd: scsi command struct
2037 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2039 struct scsi_device *sdev = cmd->device;
2040 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2041 struct scsi_target *starget = scsi_target(sdev);
2044 unsigned long cancel_rc = 0;
2047 ibmvfc_wait_while_resetting(vhost);
2048 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2049 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2051 if (!cancel_rc && !reset_rc)
2052 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2059 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2060 * @cmd: struct scsi_cmnd having problems
2063 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2066 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2068 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2069 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2070 return rc ? FAILED : SUCCESS;
2074 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2075 * @rport: rport struct
2080 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2082 struct scsi_target *starget = to_scsi_target(&rport->dev);
2083 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2084 struct ibmvfc_host *vhost = shost_priv(shost);
2085 unsigned long cancel_rc = 0;
2086 unsigned long abort_rc = 0;
2090 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2091 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2093 if (!cancel_rc && !abort_rc)
2094 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2097 ibmvfc_issue_fc_host_lip(shost);
2101 static const struct {
2102 enum ibmvfc_async_event ae;
2105 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2106 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2107 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2108 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2109 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2110 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2111 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2112 { IBMVFC_AE_LINK_UP, "Link Up" },
2113 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2114 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2115 { IBMVFC_AE_HALT, "Halt" },
2116 { IBMVFC_AE_RESUME, "Resume" },
2117 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2120 static const char *unknown_ae = "Unknown async";
2123 * ibmvfc_get_ae_desc - Get text description for async event
2127 static const char *ibmvfc_get_ae_desc(u64 ae)
2131 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2132 if (ae_desc[i].ae == ae)
2133 return ae_desc[i].desc;
2139 * ibmvfc_handle_async - Handle an async event from the adapter
2140 * @crq: crq to process
2141 * @vhost: ibmvfc host struct
2144 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2145 struct ibmvfc_host *vhost)
2147 const char *desc = ibmvfc_get_ae_desc(crq->event);
2149 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx,"
2150 " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
2152 switch (crq->event) {
2153 case IBMVFC_AE_LINK_UP:
2154 case IBMVFC_AE_RESUME:
2155 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2156 ibmvfc_init_host(vhost, 1);
2158 case IBMVFC_AE_SCN_FABRIC:
2159 vhost->events_to_log |= IBMVFC_AE_RSCN;
2160 ibmvfc_init_host(vhost, 1);
2162 case IBMVFC_AE_SCN_NPORT:
2163 case IBMVFC_AE_SCN_GROUP:
2164 case IBMVFC_AE_SCN_DOMAIN:
2165 vhost->events_to_log |= IBMVFC_AE_RSCN;
2166 case IBMVFC_AE_ELS_LOGO:
2167 case IBMVFC_AE_ELS_PRLO:
2168 case IBMVFC_AE_ELS_PLOGI:
2169 ibmvfc_reinit_host(vhost);
2171 case IBMVFC_AE_LINK_DOWN:
2172 case IBMVFC_AE_ADAPTER_FAILED:
2173 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2175 case IBMVFC_AE_LINK_DEAD:
2176 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2178 case IBMVFC_AE_HALT:
2179 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2182 dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event);
2188 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2189 * @crq: Command/Response queue
2190 * @vhost: ibmvfc host struct
2193 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2196 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2198 switch (crq->valid) {
2199 case IBMVFC_CRQ_INIT_RSP:
2200 switch (crq->format) {
2201 case IBMVFC_CRQ_INIT:
2202 dev_info(vhost->dev, "Partner initialized\n");
2203 /* Send back a response */
2204 rc = ibmvfc_send_crq_init_complete(vhost);
2206 ibmvfc_init_host(vhost, 0);
2208 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2210 case IBMVFC_CRQ_INIT_COMPLETE:
2211 dev_info(vhost->dev, "Partner initialization complete\n");
2212 ibmvfc_init_host(vhost, 0);
2215 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2218 case IBMVFC_CRQ_XPORT_EVENT:
2219 vhost->state = IBMVFC_NO_CRQ;
2220 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2221 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2222 /* We need to re-setup the interpartition connection */
2223 dev_info(vhost->dev, "Re-enabling adapter\n");
2224 vhost->client_migrated = 1;
2225 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2226 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2227 (rc = ibmvfc_send_crq_init(vhost))) {
2228 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2229 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2231 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2233 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2235 ibmvfc_purge_requests(vhost, DID_ERROR);
2236 if ((rc = ibmvfc_reset_crq(vhost)) ||
2237 (rc = ibmvfc_send_crq_init(vhost))) {
2238 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2239 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2241 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2244 case IBMVFC_CRQ_CMD_RSP:
2247 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2251 if (crq->format == IBMVFC_ASYNC_EVENT)
2254 /* The only kind of payload CRQs we should get are responses to
2255 * things we send. Make sure this response is to something we
2258 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2259 dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n",
2264 if (unlikely(atomic_read(&evt->free))) {
2265 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n",
2270 del_timer(&evt->timer);
2271 list_del(&evt->queue);
2272 ibmvfc_trc_end(evt);
2277 * ibmvfc_scan_finished - Check if the device scan is done.
2278 * @shost: scsi host struct
2279 * @time: current elapsed time
2282 * 0 if scan is not done / 1 if scan is done
2284 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2286 unsigned long flags;
2287 struct ibmvfc_host *vhost = shost_priv(shost);
2290 spin_lock_irqsave(shost->host_lock, flags);
2291 if (time >= (init_timeout * HZ)) {
2292 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2293 "continuing initialization\n", init_timeout);
2297 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE)
2299 spin_unlock_irqrestore(shost->host_lock, flags);
2304 * ibmvfc_slave_alloc - Setup the device's task set value
2305 * @sdev: struct scsi_device device to configure
2307 * Set the device's task set value so that error handling works as
2311 * 0 on success / -ENXIO if device does not exist
2313 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2315 struct Scsi_Host *shost = sdev->host;
2316 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2317 struct ibmvfc_host *vhost = shost_priv(shost);
2318 unsigned long flags = 0;
2320 if (!rport || fc_remote_port_chkready(rport))
2323 spin_lock_irqsave(shost->host_lock, flags);
2324 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2325 spin_unlock_irqrestore(shost->host_lock, flags);
2330 * ibmvfc_target_alloc - Setup the target's task set value
2331 * @starget: struct scsi_target
2333 * Set the target's task set value so that error handling works as
2337 * 0 on success / -ENXIO if device does not exist
2339 static int ibmvfc_target_alloc(struct scsi_target *starget)
2341 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2342 struct ibmvfc_host *vhost = shost_priv(shost);
2343 unsigned long flags = 0;
2345 spin_lock_irqsave(shost->host_lock, flags);
2346 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2347 spin_unlock_irqrestore(shost->host_lock, flags);
2352 * ibmvfc_slave_configure - Configure the device
2353 * @sdev: struct scsi_device device to configure
2355 * Enable allow_restart for a device if it is a disk. Adjust the
2356 * queue_depth here also.
2361 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2363 struct Scsi_Host *shost = sdev->host;
2364 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2365 unsigned long flags = 0;
2367 spin_lock_irqsave(shost->host_lock, flags);
2368 if (sdev->type == TYPE_DISK)
2369 sdev->allow_restart = 1;
2371 if (sdev->tagged_supported) {
2372 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2373 scsi_activate_tcq(sdev, sdev->queue_depth);
2375 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2377 rport->dev_loss_tmo = dev_loss_tmo;
2378 spin_unlock_irqrestore(shost->host_lock, flags);
2383 * ibmvfc_change_queue_depth - Change the device's queue depth
2384 * @sdev: scsi device struct
2385 * @qdepth: depth to set
2390 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2392 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2393 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2395 scsi_adjust_queue_depth(sdev, 0, qdepth);
2396 return sdev->queue_depth;
2400 * ibmvfc_change_queue_type - Change the device's queue type
2401 * @sdev: scsi device struct
2402 * @tag_type: type of tags to use
2405 * actual queue type set
2407 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2409 if (sdev->tagged_supported) {
2410 scsi_set_tag_type(sdev, tag_type);
2413 scsi_activate_tcq(sdev, sdev->queue_depth);
2415 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2422 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2423 struct device_attribute *attr, char *buf)
2425 struct Scsi_Host *shost = class_to_shost(dev);
2426 struct ibmvfc_host *vhost = shost_priv(shost);
2428 return snprintf(buf, PAGE_SIZE, "%s\n",
2429 vhost->login_buf->resp.partition_name);
2432 static struct device_attribute ibmvfc_host_partition_name = {
2434 .name = "partition_name",
2437 .show = ibmvfc_show_host_partition_name,
2440 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2441 struct device_attribute *attr, char *buf)
2443 struct Scsi_Host *shost = class_to_shost(dev);
2444 struct ibmvfc_host *vhost = shost_priv(shost);
2446 return snprintf(buf, PAGE_SIZE, "%s\n",
2447 vhost->login_buf->resp.device_name);
2450 static struct device_attribute ibmvfc_host_device_name = {
2452 .name = "device_name",
2455 .show = ibmvfc_show_host_device_name,
2458 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2459 struct device_attribute *attr, char *buf)
2461 struct Scsi_Host *shost = class_to_shost(dev);
2462 struct ibmvfc_host *vhost = shost_priv(shost);
2464 return snprintf(buf, PAGE_SIZE, "%s\n",
2465 vhost->login_buf->resp.port_loc_code);
2468 static struct device_attribute ibmvfc_host_loc_code = {
2470 .name = "port_loc_code",
2473 .show = ibmvfc_show_host_loc_code,
2476 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2477 struct device_attribute *attr, char *buf)
2479 struct Scsi_Host *shost = class_to_shost(dev);
2480 struct ibmvfc_host *vhost = shost_priv(shost);
2482 return snprintf(buf, PAGE_SIZE, "%s\n",
2483 vhost->login_buf->resp.drc_name);
2486 static struct device_attribute ibmvfc_host_drc_name = {
2491 .show = ibmvfc_show_host_drc_name,
2494 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2495 struct device_attribute *attr, char *buf)
2497 struct Scsi_Host *shost = class_to_shost(dev);
2498 struct ibmvfc_host *vhost = shost_priv(shost);
2499 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2502 static struct device_attribute ibmvfc_host_npiv_version = {
2504 .name = "npiv_version",
2507 .show = ibmvfc_show_host_npiv_version,
2511 * ibmvfc_show_log_level - Show the adapter's error logging level
2512 * @dev: class device struct
2516 * number of bytes printed to buffer
2518 static ssize_t ibmvfc_show_log_level(struct device *dev,
2519 struct device_attribute *attr, char *buf)
2521 struct Scsi_Host *shost = class_to_shost(dev);
2522 struct ibmvfc_host *vhost = shost_priv(shost);
2523 unsigned long flags = 0;
2526 spin_lock_irqsave(shost->host_lock, flags);
2527 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2528 spin_unlock_irqrestore(shost->host_lock, flags);
2533 * ibmvfc_store_log_level - Change the adapter's error logging level
2534 * @dev: class device struct
2538 * number of bytes printed to buffer
2540 static ssize_t ibmvfc_store_log_level(struct device *dev,
2541 struct device_attribute *attr,
2542 const char *buf, size_t count)
2544 struct Scsi_Host *shost = class_to_shost(dev);
2545 struct ibmvfc_host *vhost = shost_priv(shost);
2546 unsigned long flags = 0;
2548 spin_lock_irqsave(shost->host_lock, flags);
2549 vhost->log_level = simple_strtoul(buf, NULL, 10);
2550 spin_unlock_irqrestore(shost->host_lock, flags);
2554 static struct device_attribute ibmvfc_log_level_attr = {
2556 .name = "log_level",
2557 .mode = S_IRUGO | S_IWUSR,
2559 .show = ibmvfc_show_log_level,
2560 .store = ibmvfc_store_log_level
2563 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2565 * ibmvfc_read_trace - Dump the adapter trace
2566 * @kobj: kobject struct
2567 * @bin_attr: bin_attribute struct
2570 * @count: buffer size
2573 * number of bytes printed to buffer
2575 static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2576 struct bin_attribute *bin_attr,
2577 char *buf, loff_t off, size_t count)
2579 struct device *dev = container_of(kobj, struct device, kobj);
2580 struct Scsi_Host *shost = class_to_shost(dev);
2581 struct ibmvfc_host *vhost = shost_priv(shost);
2582 unsigned long flags = 0;
2583 int size = IBMVFC_TRACE_SIZE;
2584 char *src = (char *)vhost->trace;
2588 if (off + count > size) {
2593 spin_lock_irqsave(shost->host_lock, flags);
2594 memcpy(buf, &src[off], count);
2595 spin_unlock_irqrestore(shost->host_lock, flags);
2599 static struct bin_attribute ibmvfc_trace_attr = {
2605 .read = ibmvfc_read_trace,
2609 static struct device_attribute *ibmvfc_attrs[] = {
2610 &ibmvfc_host_partition_name,
2611 &ibmvfc_host_device_name,
2612 &ibmvfc_host_loc_code,
2613 &ibmvfc_host_drc_name,
2614 &ibmvfc_host_npiv_version,
2615 &ibmvfc_log_level_attr,
2619 static struct scsi_host_template driver_template = {
2620 .module = THIS_MODULE,
2621 .name = "IBM POWER Virtual FC Adapter",
2622 .proc_name = IBMVFC_NAME,
2623 .queuecommand = ibmvfc_queuecommand,
2624 .eh_abort_handler = ibmvfc_eh_abort_handler,
2625 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2626 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2627 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2628 .slave_alloc = ibmvfc_slave_alloc,
2629 .slave_configure = ibmvfc_slave_configure,
2630 .target_alloc = ibmvfc_target_alloc,
2631 .scan_finished = ibmvfc_scan_finished,
2632 .change_queue_depth = ibmvfc_change_queue_depth,
2633 .change_queue_type = ibmvfc_change_queue_type,
2635 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2637 .sg_tablesize = SG_ALL,
2638 .max_sectors = IBMVFC_MAX_SECTORS,
2639 .use_clustering = ENABLE_CLUSTERING,
2640 .shost_attrs = ibmvfc_attrs,
2644 * ibmvfc_next_async_crq - Returns the next entry in async queue
2645 * @vhost: ibmvfc host struct
2648 * Pointer to next entry in queue / NULL if empty
2650 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2652 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2653 struct ibmvfc_async_crq *crq;
2655 crq = &async_crq->msgs[async_crq->cur];
2656 if (crq->valid & 0x80) {
2657 if (++async_crq->cur == async_crq->size)
2666 * ibmvfc_next_crq - Returns the next entry in message queue
2667 * @vhost: ibmvfc host struct
2670 * Pointer to next entry in queue / NULL if empty
2672 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2674 struct ibmvfc_crq_queue *queue = &vhost->crq;
2675 struct ibmvfc_crq *crq;
2677 crq = &queue->msgs[queue->cur];
2678 if (crq->valid & 0x80) {
2679 if (++queue->cur == queue->size)
2688 * ibmvfc_interrupt - Interrupt handler
2689 * @irq: number of irq to handle, not used
2690 * @dev_instance: ibmvfc_host that received interrupt
2695 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2697 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
2698 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2699 struct ibmvfc_crq *crq;
2700 struct ibmvfc_async_crq *async;
2701 unsigned long flags;
2704 spin_lock_irqsave(vhost->host->host_lock, flags);
2705 vio_disable_interrupts(to_vio_dev(vhost->dev));
2707 /* Pull all the valid messages off the CRQ */
2708 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2709 ibmvfc_handle_crq(crq, vhost);
2713 /* Pull all the valid messages off the async CRQ */
2714 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2715 ibmvfc_handle_async(async, vhost);
2719 vio_enable_interrupts(vdev);
2720 if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2721 vio_disable_interrupts(vdev);
2722 ibmvfc_handle_crq(crq, vhost);
2724 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2725 vio_disable_interrupts(vdev);
2726 ibmvfc_handle_async(async, vhost);
2732 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2737 * ibmvfc_init_tgt - Set the next init job step for the target
2738 * @tgt: ibmvfc target struct
2739 * @job_step: job step to perform
2742 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2743 void (*job_step) (struct ibmvfc_target *))
2745 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2746 tgt->job_step = job_step;
2747 wake_up(&tgt->vhost->work_wait_q);
2751 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2752 * @tgt: ibmvfc target struct
2753 * @job_step: initialization job step
2756 static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
2757 void (*job_step) (struct ibmvfc_target *))
2759 if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) {
2760 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2761 wake_up(&tgt->vhost->work_wait_q);
2763 ibmvfc_init_tgt(tgt, job_step);
2767 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2768 * @evt: ibmvfc event struct
2771 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2773 struct ibmvfc_target *tgt = evt->tgt;
2774 struct ibmvfc_host *vhost = evt->vhost;
2775 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
2776 u32 status = rsp->common.status;
2778 vhost->discovery_threads--;
2779 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2781 case IBMVFC_MAD_SUCCESS:
2782 tgt_dbg(tgt, "Process Login succeeded\n");
2783 tgt->need_login = 0;
2784 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT);
2786 case IBMVFC_MAD_DRIVER_FAILED:
2788 case IBMVFC_MAD_CRQ_ERROR:
2789 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2791 case IBMVFC_MAD_FAILED:
2793 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2794 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2795 rsp->status, rsp->error, status);
2796 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2797 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2799 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2803 kref_put(&tgt->kref, ibmvfc_release_tgt);
2804 ibmvfc_free_event(evt);
2805 wake_up(&vhost->work_wait_q);
2809 * ibmvfc_tgt_send_prli - Send a process login
2810 * @tgt: ibmvfc target struct
2813 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2815 struct ibmvfc_process_login *prli;
2816 struct ibmvfc_host *vhost = tgt->vhost;
2817 struct ibmvfc_event *evt;
2819 if (vhost->discovery_threads >= disc_threads)
2822 kref_get(&tgt->kref);
2823 evt = ibmvfc_get_event(vhost);
2824 vhost->discovery_threads++;
2825 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2827 prli = &evt->iu.prli;
2828 memset(prli, 0, sizeof(*prli));
2829 prli->common.version = 1;
2830 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2831 prli->common.length = sizeof(*prli);
2832 prli->scsi_id = tgt->scsi_id;
2834 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2835 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2836 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2838 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2839 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2840 vhost->discovery_threads--;
2841 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2842 kref_put(&tgt->kref, ibmvfc_release_tgt);
2844 tgt_dbg(tgt, "Sent process login\n");
2848 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2849 * @evt: ibmvfc event struct
2852 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
2854 struct ibmvfc_target *tgt = evt->tgt;
2855 struct ibmvfc_host *vhost = evt->vhost;
2856 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
2857 u32 status = rsp->common.status;
2859 vhost->discovery_threads--;
2860 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2862 case IBMVFC_MAD_SUCCESS:
2863 tgt_dbg(tgt, "Port Login succeeded\n");
2864 if (tgt->ids.port_name &&
2865 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
2867 tgt_dbg(tgt, "Port re-init required\n");
2870 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
2871 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
2872 tgt->ids.port_id = tgt->scsi_id;
2873 tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET;
2874 memcpy(&tgt->service_parms, &rsp->service_parms,
2875 sizeof(tgt->service_parms));
2876 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
2877 sizeof(tgt->service_parms_change));
2878 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
2880 case IBMVFC_MAD_DRIVER_FAILED:
2882 case IBMVFC_MAD_CRQ_ERROR:
2883 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2885 case IBMVFC_MAD_FAILED:
2887 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2888 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
2889 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
2890 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
2892 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2893 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2895 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2899 kref_put(&tgt->kref, ibmvfc_release_tgt);
2900 ibmvfc_free_event(evt);
2901 wake_up(&vhost->work_wait_q);
2905 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
2906 * @tgt: ibmvfc target struct
2909 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
2911 struct ibmvfc_port_login *plogi;
2912 struct ibmvfc_host *vhost = tgt->vhost;
2913 struct ibmvfc_event *evt;
2915 if (vhost->discovery_threads >= disc_threads)
2918 kref_get(&tgt->kref);
2919 evt = ibmvfc_get_event(vhost);
2920 vhost->discovery_threads++;
2921 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2922 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
2924 plogi = &evt->iu.plogi;
2925 memset(plogi, 0, sizeof(*plogi));
2926 plogi->common.version = 1;
2927 plogi->common.opcode = IBMVFC_PORT_LOGIN;
2928 plogi->common.length = sizeof(*plogi);
2929 plogi->scsi_id = tgt->scsi_id;
2931 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2932 vhost->discovery_threads--;
2933 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2934 kref_put(&tgt->kref, ibmvfc_release_tgt);
2936 tgt_dbg(tgt, "Sent port login\n");
2940 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
2941 * @evt: ibmvfc event struct
2944 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
2946 struct ibmvfc_target *tgt = evt->tgt;
2947 struct ibmvfc_host *vhost = evt->vhost;
2948 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
2949 u32 status = rsp->common.status;
2951 vhost->discovery_threads--;
2952 ibmvfc_free_event(evt);
2953 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2956 case IBMVFC_MAD_SUCCESS:
2957 tgt_dbg(tgt, "Implicit Logout succeeded\n");
2959 case IBMVFC_MAD_DRIVER_FAILED:
2960 kref_put(&tgt->kref, ibmvfc_release_tgt);
2961 wake_up(&vhost->work_wait_q);
2963 case IBMVFC_MAD_FAILED:
2965 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
2969 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
2970 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
2971 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
2972 tgt->scsi_id != tgt->new_scsi_id)
2973 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2974 kref_put(&tgt->kref, ibmvfc_release_tgt);
2975 wake_up(&vhost->work_wait_q);
2979 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
2980 * @tgt: ibmvfc target struct
2983 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
2985 struct ibmvfc_implicit_logout *mad;
2986 struct ibmvfc_host *vhost = tgt->vhost;
2987 struct ibmvfc_event *evt;
2989 if (vhost->discovery_threads >= disc_threads)
2992 kref_get(&tgt->kref);
2993 evt = ibmvfc_get_event(vhost);
2994 vhost->discovery_threads++;
2995 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
2997 mad = &evt->iu.implicit_logout;
2998 memset(mad, 0, sizeof(*mad));
2999 mad->common.version = 1;
3000 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3001 mad->common.length = sizeof(*mad);
3002 mad->old_scsi_id = tgt->scsi_id;
3004 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3005 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3006 vhost->discovery_threads--;
3007 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3008 kref_put(&tgt->kref, ibmvfc_release_tgt);
3010 tgt_dbg(tgt, "Sent Implicit Logout\n");
3014 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3015 * @mad: ibmvfc passthru mad struct
3016 * @tgt: ibmvfc target struct
3019 * 1 if PLOGI needed / 0 if PLOGI not needed
3021 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3022 struct ibmvfc_target *tgt)
3024 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3025 sizeof(tgt->ids.port_name)))
3027 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3028 sizeof(tgt->ids.node_name)))
3030 if (mad->fc_iu.response[6] != tgt->scsi_id)
3036 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3037 * @evt: ibmvfc event struct
3040 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3042 struct ibmvfc_target *tgt = evt->tgt;
3043 struct ibmvfc_host *vhost = evt->vhost;
3044 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3045 u32 status = mad->common.status;
3046 u8 fc_reason, fc_explain;
3048 vhost->discovery_threads--;
3049 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3052 case IBMVFC_MAD_SUCCESS:
3053 tgt_dbg(tgt, "ADISC succeeded\n");
3054 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3055 tgt->need_login = 1;
3057 case IBMVFC_MAD_DRIVER_FAILED:
3059 case IBMVFC_MAD_FAILED:
3061 tgt->need_login = 1;
3062 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3063 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3064 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3065 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3066 mad->iu.status, mad->iu.error,
3067 ibmvfc_get_fc_type(fc_reason), fc_reason,
3068 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3072 kref_put(&tgt->kref, ibmvfc_release_tgt);
3073 ibmvfc_free_event(evt);
3074 wake_up(&vhost->work_wait_q);
3078 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3079 * @evt: ibmvfc event struct
3082 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3084 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3086 memset(mad, 0, sizeof(*mad));
3087 mad->common.version = 1;
3088 mad->common.opcode = IBMVFC_PASSTHRU;
3089 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3090 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3091 offsetof(struct ibmvfc_passthru_mad, iu);
3092 mad->cmd_ioba.len = sizeof(mad->iu);
3093 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3094 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3095 mad->iu.cmd.va = (u64)evt->crq.ioba +
3096 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3097 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3098 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3099 mad->iu.rsp.va = (u64)evt->crq.ioba +
3100 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3101 offsetof(struct ibmvfc_passthru_fc_iu, response);
3102 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3106 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3107 * @tgt: ibmvfc target struct
3110 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3112 struct ibmvfc_passthru_mad *mad;
3113 struct ibmvfc_host *vhost = tgt->vhost;
3114 struct ibmvfc_event *evt;
3116 if (vhost->discovery_threads >= disc_threads)
3119 kref_get(&tgt->kref);
3120 evt = ibmvfc_get_event(vhost);
3121 vhost->discovery_threads++;
3122 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3125 ibmvfc_init_passthru(evt);
3126 mad = &evt->iu.passthru;
3127 mad->iu.flags = IBMVFC_FC_ELS;
3128 mad->iu.scsi_id = tgt->scsi_id;
3130 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3131 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3132 sizeof(vhost->login_buf->resp.port_name));
3133 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3134 sizeof(vhost->login_buf->resp.node_name));
3135 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3137 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3138 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3139 vhost->discovery_threads--;
3140 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3141 kref_put(&tgt->kref, ibmvfc_release_tgt);
3143 tgt_dbg(tgt, "Sent ADISC\n");
3147 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3148 * @evt: ibmvfc event struct
3151 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3153 struct ibmvfc_target *tgt = evt->tgt;
3154 struct ibmvfc_host *vhost = evt->vhost;
3155 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3156 u32 status = rsp->common.status;
3158 vhost->discovery_threads--;
3159 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3161 case IBMVFC_MAD_SUCCESS:
3162 tgt_dbg(tgt, "Query Target succeeded\n");
3163 tgt->new_scsi_id = rsp->scsi_id;
3164 if (rsp->scsi_id != tgt->scsi_id)
3165 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3167 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3169 case IBMVFC_MAD_DRIVER_FAILED:
3171 case IBMVFC_MAD_CRQ_ERROR:
3172 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3174 case IBMVFC_MAD_FAILED:
3176 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3177 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3178 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3179 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3181 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3182 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3183 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3184 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3185 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3186 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3188 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3192 kref_put(&tgt->kref, ibmvfc_release_tgt);
3193 ibmvfc_free_event(evt);
3194 wake_up(&vhost->work_wait_q);
3198 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3199 * @tgt: ibmvfc target struct
3202 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3204 struct ibmvfc_query_tgt *query_tgt;
3205 struct ibmvfc_host *vhost = tgt->vhost;
3206 struct ibmvfc_event *evt;
3208 if (vhost->discovery_threads >= disc_threads)
3211 kref_get(&tgt->kref);
3212 evt = ibmvfc_get_event(vhost);
3213 vhost->discovery_threads++;
3215 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3216 query_tgt = &evt->iu.query_tgt;
3217 memset(query_tgt, 0, sizeof(*query_tgt));
3218 query_tgt->common.version = 1;
3219 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3220 query_tgt->common.length = sizeof(*query_tgt);
3221 query_tgt->wwpn = tgt->ids.port_name;
3223 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3224 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3225 vhost->discovery_threads--;
3226 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3227 kref_put(&tgt->kref, ibmvfc_release_tgt);
3229 tgt_dbg(tgt, "Sent Query Target\n");
3233 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3234 * @vhost: ibmvfc host struct
3235 * @scsi_id: SCSI ID to allocate target for
3238 * 0 on success / other on failure
3240 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3242 struct ibmvfc_target *tgt;
3243 unsigned long flags;
3245 spin_lock_irqsave(vhost->host->host_lock, flags);
3246 list_for_each_entry(tgt, &vhost->targets, queue) {
3247 if (tgt->scsi_id == scsi_id) {
3248 if (tgt->need_login)
3249 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3253 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3255 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
3257 dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n",
3262 tgt->scsi_id = scsi_id;
3263 tgt->new_scsi_id = scsi_id;
3265 tgt->need_login = 1;
3266 kref_init(&tgt->kref);
3267 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3268 spin_lock_irqsave(vhost->host->host_lock, flags);
3269 list_add_tail(&tgt->queue, &vhost->targets);
3272 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3277 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3278 * @vhost: ibmvfc host struct
3281 * 0 on success / other on failure
3283 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3287 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3288 rc = ibmvfc_alloc_target(vhost,
3289 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3295 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3296 * @evt: ibmvfc event struct
3299 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3301 struct ibmvfc_host *vhost = evt->vhost;
3302 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3303 u32 mad_status = rsp->common.status;
3305 switch (mad_status) {
3306 case IBMVFC_MAD_SUCCESS:
3307 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3308 vhost->num_targets = rsp->num_written;
3309 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3311 case IBMVFC_MAD_FAILED:
3312 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n",
3313 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3314 ibmvfc_retry_host_init(vhost);
3316 case IBMVFC_MAD_DRIVER_FAILED:
3319 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3320 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3324 ibmvfc_free_event(evt);
3325 wake_up(&vhost->work_wait_q);
3329 * ibmvfc_discover_targets - Send Discover Targets MAD
3330 * @vhost: ibmvfc host struct
3333 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3335 struct ibmvfc_discover_targets *mad;
3336 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3338 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3339 mad = &evt->iu.discover_targets;
3340 memset(mad, 0, sizeof(*mad));
3341 mad->common.version = 1;
3342 mad->common.opcode = IBMVFC_DISC_TARGETS;
3343 mad->common.length = sizeof(*mad);
3344 mad->bufflen = vhost->disc_buf_sz;
3345 mad->buffer.va = vhost->disc_buf_dma;
3346 mad->buffer.len = vhost->disc_buf_sz;
3347 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3349 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3350 ibmvfc_dbg(vhost, "Sent discover targets\n");
3352 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3356 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3357 * @evt: ibmvfc event struct
3360 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3362 struct ibmvfc_host *vhost = evt->vhost;
3363 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3364 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3365 unsigned int npiv_max_sectors;
3367 switch (mad_status) {
3368 case IBMVFC_MAD_SUCCESS:
3369 ibmvfc_free_event(evt);
3371 case IBMVFC_MAD_FAILED:
3372 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n",
3373 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3374 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3375 ibmvfc_retry_host_init(vhost);
3377 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3378 ibmvfc_free_event(evt);
3380 case IBMVFC_MAD_CRQ_ERROR:
3381 ibmvfc_retry_host_init(vhost);
3382 case IBMVFC_MAD_DRIVER_FAILED:
3383 ibmvfc_free_event(evt);
3386 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3387 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3388 ibmvfc_free_event(evt);
3392 vhost->client_migrated = 0;
3394 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3395 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3397 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3398 wake_up(&vhost->work_wait_q);
3402 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3403 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3405 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3406 wake_up(&vhost->work_wait_q);
3410 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3411 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3412 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3413 rsp->drc_name, npiv_max_sectors);
3415 fc_host_fabric_name(vhost->host) = rsp->node_name;
3416 fc_host_node_name(vhost->host) = rsp->node_name;
3417 fc_host_port_name(vhost->host) = rsp->port_name;
3418 fc_host_port_id(vhost->host) = rsp->scsi_id;
3419 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3420 fc_host_supported_classes(vhost->host) = 0;
3421 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3422 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3423 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3424 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3425 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3426 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3427 fc_host_maxframe_size(vhost->host) =
3428 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3430 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3431 vhost->host->max_sectors = npiv_max_sectors;
3432 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3433 wake_up(&vhost->work_wait_q);
3437 * ibmvfc_npiv_login - Sends NPIV login
3438 * @vhost: ibmvfc host struct
3441 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3443 struct ibmvfc_npiv_login_mad *mad;
3444 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3446 ibmvfc_gather_partition_info(vhost);
3447 ibmvfc_set_login_info(vhost);
3448 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3450 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3451 mad = &evt->iu.npiv_login;
3452 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3453 mad->common.version = 1;
3454 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3455 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3456 mad->buffer.va = vhost->login_buf_dma;
3457 mad->buffer.len = sizeof(*vhost->login_buf);
3459 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3461 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3462 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3464 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3468 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3469 * @vhost: ibmvfc host struct
3472 * 1 if work to do / 0 if not
3474 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3476 struct ibmvfc_target *tgt;
3478 list_for_each_entry(tgt, &vhost->targets, queue) {
3479 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3480 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3488 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3489 * @vhost: ibmvfc host struct
3492 * 1 if work to do / 0 if not
3494 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3496 struct ibmvfc_target *tgt;
3498 if (kthread_should_stop())
3500 switch (vhost->action) {
3501 case IBMVFC_HOST_ACTION_NONE:
3502 case IBMVFC_HOST_ACTION_INIT_WAIT:
3504 case IBMVFC_HOST_ACTION_TGT_INIT:
3505 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3506 if (vhost->discovery_threads == disc_threads)
3508 list_for_each_entry(tgt, &vhost->targets, queue)
3509 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3511 list_for_each_entry(tgt, &vhost->targets, queue)
3512 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3515 case IBMVFC_HOST_ACTION_INIT:
3516 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3517 case IBMVFC_HOST_ACTION_TGT_ADD:
3518 case IBMVFC_HOST_ACTION_TGT_DEL:
3519 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
3520 case IBMVFC_HOST_ACTION_QUERY:
3529 * ibmvfc_work_to_do - Is there task level work to do?
3530 * @vhost: ibmvfc host struct
3533 * 1 if work to do / 0 if not
3535 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3537 unsigned long flags;
3540 spin_lock_irqsave(vhost->host->host_lock, flags);
3541 rc = __ibmvfc_work_to_do(vhost);
3542 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3547 * ibmvfc_log_ae - Log async events if necessary
3548 * @vhost: ibmvfc host struct
3549 * @events: events to log
3552 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3554 if (events & IBMVFC_AE_RSCN)
3555 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3556 if ((events & IBMVFC_AE_LINKDOWN) &&
3557 vhost->state >= IBMVFC_HALTED)
3558 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3559 if ((events & IBMVFC_AE_LINKUP) &&
3560 vhost->state == IBMVFC_INITIALIZING)
3561 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3565 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3566 * @tgt: ibmvfc target struct
3569 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3571 struct ibmvfc_host *vhost = tgt->vhost;
3572 struct fc_rport *rport;
3573 unsigned long flags;
3575 tgt_dbg(tgt, "Adding rport\n");
3576 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3577 spin_lock_irqsave(vhost->host->host_lock, flags);
3579 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3581 tgt_dbg(tgt, "rport add succeeded\n");
3582 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3583 rport->supported_classes = 0;
3584 tgt->target_id = rport->scsi_target_id;
3585 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3586 rport->supported_classes |= FC_COS_CLASS1;
3587 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3588 rport->supported_classes |= FC_COS_CLASS2;
3589 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3590 rport->supported_classes |= FC_COS_CLASS3;
3592 tgt_dbg(tgt, "rport add failed\n");
3593 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3597 * ibmvfc_do_work - Do task level work
3598 * @vhost: ibmvfc host struct
3601 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3603 struct ibmvfc_target *tgt;
3604 unsigned long flags;
3605 struct fc_rport *rport;
3607 ibmvfc_log_ae(vhost, vhost->events_to_log);
3608 spin_lock_irqsave(vhost->host->host_lock, flags);
3609 vhost->events_to_log = 0;
3610 switch (vhost->action) {
3611 case IBMVFC_HOST_ACTION_NONE:
3612 case IBMVFC_HOST_ACTION_INIT_WAIT:
3614 case IBMVFC_HOST_ACTION_INIT:
3615 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
3616 vhost->job_step(vhost);
3618 case IBMVFC_HOST_ACTION_QUERY:
3619 list_for_each_entry(tgt, &vhost->targets, queue)
3620 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3621 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3623 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3624 list_for_each_entry(tgt, &vhost->targets, queue) {
3625 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3631 if (!ibmvfc_dev_init_to_do(vhost))
3632 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3634 case IBMVFC_HOST_ACTION_TGT_DEL:
3635 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
3636 list_for_each_entry(tgt, &vhost->targets, queue) {
3637 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3638 tgt_dbg(tgt, "Deleting rport\n");
3641 list_del(&tgt->queue);
3642 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3644 fc_remote_port_delete(rport);
3645 kref_put(&tgt->kref, ibmvfc_release_tgt);
3650 if (vhost->state == IBMVFC_INITIALIZING) {
3651 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
3652 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3653 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD);
3654 vhost->init_retries = 0;
3655 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3656 scsi_unblock_requests(vhost->host);
3659 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3660 vhost->job_step = ibmvfc_discover_targets;
3663 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3664 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3665 scsi_unblock_requests(vhost->host);
3666 wake_up(&vhost->init_wait_q);
3670 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3671 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
3672 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3673 ibmvfc_alloc_targets(vhost);
3674 spin_lock_irqsave(vhost->host->host_lock, flags);
3676 case IBMVFC_HOST_ACTION_TGT_INIT:
3677 list_for_each_entry(tgt, &vhost->targets, queue) {
3678 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3684 if (!ibmvfc_dev_init_to_do(vhost))
3685 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
3687 case IBMVFC_HOST_ACTION_TGT_ADD:
3688 list_for_each_entry(tgt, &vhost->targets, queue) {
3689 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) {
3690 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3691 ibmvfc_tgt_add_rport(tgt);
3696 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
3698 scsi_block_requests(vhost->host);
3699 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3701 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3702 wake_up(&vhost->init_wait_q);
3709 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3713 * ibmvfc_work - Do task level work
3714 * @data: ibmvfc host struct
3719 static int ibmvfc_work(void *data)
3721 struct ibmvfc_host *vhost = data;
3724 set_user_nice(current, -20);
3727 rc = wait_event_interruptible(vhost->work_wait_q,
3728 ibmvfc_work_to_do(vhost));
3732 if (kthread_should_stop())
3735 ibmvfc_do_work(vhost);
3738 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
3743 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3744 * @vhost: ibmvfc host struct
3746 * Allocates a page for messages, maps it for dma, and registers
3747 * the crq with the hypervisor.
3750 * zero on success / other on failure
3752 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
3754 int rc, retrc = -ENOMEM;
3755 struct device *dev = vhost->dev;
3756 struct vio_dev *vdev = to_vio_dev(dev);
3757 struct ibmvfc_crq_queue *crq = &vhost->crq;
3760 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
3765 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3766 crq->msg_token = dma_map_single(dev, crq->msgs,
3767 PAGE_SIZE, DMA_BIDIRECTIONAL);
3769 if (dma_mapping_error(dev, crq->msg_token))
3772 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3773 crq->msg_token, PAGE_SIZE);
3775 if (rc == H_RESOURCE)
3776 /* maybe kexecing and resource is busy. try a reset */
3777 retrc = rc = ibmvfc_reset_crq(vhost);
3780 dev_warn(dev, "Partner adapter not ready\n");
3782 dev_warn(dev, "Error %d opening adapter\n", rc);
3783 goto reg_crq_failed;
3788 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
3789 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
3790 goto req_irq_failed;
3793 if ((rc = vio_enable_interrupts(vdev))) {
3794 dev_err(dev, "Error %d enabling interrupts\n", rc);
3795 goto req_irq_failed;
3804 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3805 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3807 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3809 free_page((unsigned long)crq->msgs);
3814 * ibmvfc_free_mem - Free memory for vhost
3815 * @vhost: ibmvfc host struct
3820 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
3822 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3825 mempool_destroy(vhost->tgt_pool);
3826 kfree(vhost->trace);
3827 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
3828 vhost->disc_buf_dma);
3829 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
3830 vhost->login_buf, vhost->login_buf_dma);
3831 dma_pool_destroy(vhost->sg_pool);
3832 dma_unmap_single(vhost->dev, async_q->msg_token,
3833 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3834 free_page((unsigned long)async_q->msgs);
3839 * ibmvfc_alloc_mem - Allocate memory for vhost
3840 * @vhost: ibmvfc host struct
3843 * 0 on success / non-zero on failure
3845 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
3847 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3848 struct device *dev = vhost->dev;
3851 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
3852 if (!async_q->msgs) {
3853 dev_err(dev, "Couldn't allocate async queue.\n");
3857 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
3858 async_q->msg_token = dma_map_single(dev, async_q->msgs,
3859 async_q->size * sizeof(*async_q->msgs),
3862 if (dma_mapping_error(dev, async_q->msg_token)) {
3863 dev_err(dev, "Failed to map async queue\n");
3864 goto free_async_crq;
3867 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
3868 SG_ALL * sizeof(struct srp_direct_buf),
3869 sizeof(struct srp_direct_buf), 0);
3871 if (!vhost->sg_pool) {
3872 dev_err(dev, "Failed to allocate sg pool\n");
3873 goto unmap_async_crq;
3876 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
3877 &vhost->login_buf_dma, GFP_KERNEL);
3879 if (!vhost->login_buf) {
3880 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
3884 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
3885 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
3886 &vhost->disc_buf_dma, GFP_KERNEL);
3888 if (!vhost->disc_buf) {
3889 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
3890 goto free_login_buffer;
3893 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
3894 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
3897 goto free_disc_buffer;
3899 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
3900 sizeof(struct ibmvfc_target));
3902 if (!vhost->tgt_pool) {
3903 dev_err(dev, "Couldn't allocate target memory pool\n");
3911 kfree(vhost->trace);
3913 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
3914 vhost->disc_buf_dma);
3916 dma_free_coherent(dev, sizeof(*vhost->login_buf),
3917 vhost->login_buf, vhost->login_buf_dma);
3919 dma_pool_destroy(vhost->sg_pool);
3921 dma_unmap_single(dev, async_q->msg_token,
3922 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3924 free_page((unsigned long)async_q->msgs);
3931 * ibmvfc_probe - Adapter hot plug add entry point
3932 * @vdev: vio device struct
3933 * @id: vio device id struct
3936 * 0 on success / non-zero on failure
3938 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
3940 struct ibmvfc_host *vhost;
3941 struct Scsi_Host *shost;
3942 struct device *dev = &vdev->dev;
3946 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
3948 dev_err(dev, "Couldn't allocate host data\n");
3952 shost->transportt = ibmvfc_transport_template;
3953 shost->can_queue = max_requests;
3954 shost->max_lun = max_lun;
3955 shost->max_id = max_targets;
3956 shost->max_sectors = IBMVFC_MAX_SECTORS;
3957 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
3958 shost->unique_id = shost->host_no;
3960 vhost = shost_priv(shost);
3961 INIT_LIST_HEAD(&vhost->sent);
3962 INIT_LIST_HEAD(&vhost->free);
3963 INIT_LIST_HEAD(&vhost->targets);
3964 sprintf(vhost->name, IBMVFC_NAME);
3965 vhost->host = shost;
3967 vhost->partition_number = -1;
3968 vhost->log_level = log_level;
3969 strcpy(vhost->partition_name, "UNKNOWN");
3970 init_waitqueue_head(&vhost->work_wait_q);
3971 init_waitqueue_head(&vhost->init_wait_q);
3973 if ((rc = ibmvfc_alloc_mem(vhost)))
3974 goto free_scsi_host;
3976 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
3979 if (IS_ERR(vhost->work_thread)) {
3980 dev_err(dev, "Couldn't create kernel thread: %ld\n",
3981 PTR_ERR(vhost->work_thread));
3985 if ((rc = ibmvfc_init_crq(vhost))) {
3986 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3990 if ((rc = ibmvfc_init_event_pool(vhost))) {
3991 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
3995 if ((rc = scsi_add_host(shost, dev)))
3996 goto release_event_pool;
3998 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
3999 &ibmvfc_trace_attr))) {
4000 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4004 dev_set_drvdata(dev, vhost);
4005 spin_lock(&ibmvfc_driver_lock);
4006 list_add_tail(&vhost->queue, &ibmvfc_head);
4007 spin_unlock(&ibmvfc_driver_lock);
4009 ibmvfc_send_crq_init(vhost);
4010 scsi_scan_host(shost);
4014 scsi_remove_host(shost);
4016 ibmvfc_free_event_pool(vhost);
4018 ibmvfc_release_crq_queue(vhost);
4020 kthread_stop(vhost->work_thread);
4022 ibmvfc_free_mem(vhost);
4024 scsi_host_put(shost);
4031 * ibmvfc_remove - Adapter hot plug remove entry point
4032 * @vdev: vio device struct
4037 static int ibmvfc_remove(struct vio_dev *vdev)
4039 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4040 unsigned long flags;
4043 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4044 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4045 ibmvfc_wait_while_resetting(vhost);
4046 ibmvfc_release_crq_queue(vhost);
4047 kthread_stop(vhost->work_thread);
4048 fc_remove_host(vhost->host);
4049 scsi_remove_host(vhost->host);
4051 spin_lock_irqsave(vhost->host->host_lock, flags);
4052 ibmvfc_purge_requests(vhost, DID_ERROR);
4053 ibmvfc_free_event_pool(vhost);
4054 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4056 ibmvfc_free_mem(vhost);
4057 spin_lock(&ibmvfc_driver_lock);
4058 list_del(&vhost->queue);
4059 spin_unlock(&ibmvfc_driver_lock);
4060 scsi_host_put(vhost->host);
4066 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4067 * @vdev: vio device struct
4070 * Number of bytes the driver will need to DMA map at the same time in
4071 * order to perform well.
4073 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4075 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4076 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4079 static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4080 {"fcp", "IBM,vfc-client"},
4083 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4085 static struct vio_driver ibmvfc_driver = {
4086 .id_table = ibmvfc_device_table,
4087 .probe = ibmvfc_probe,
4088 .remove = ibmvfc_remove,
4089 .get_desired_dma = ibmvfc_get_desired_dma,
4091 .name = IBMVFC_NAME,
4092 .owner = THIS_MODULE,
4096 static struct fc_function_template ibmvfc_transport_functions = {
4097 .show_host_fabric_name = 1,
4098 .show_host_node_name = 1,
4099 .show_host_port_name = 1,
4100 .show_host_supported_classes = 1,
4101 .show_host_port_type = 1,
4102 .show_host_port_id = 1,
4104 .get_host_port_state = ibmvfc_get_host_port_state,
4105 .show_host_port_state = 1,
4107 .get_host_speed = ibmvfc_get_host_speed,
4108 .show_host_speed = 1,
4110 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4111 .terminate_rport_io = ibmvfc_terminate_rport_io,
4113 .show_rport_maxframe_size = 1,
4114 .show_rport_supported_classes = 1,
4116 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4117 .show_rport_dev_loss_tmo = 1,
4119 .get_starget_node_name = ibmvfc_get_starget_node_name,
4120 .show_starget_node_name = 1,
4122 .get_starget_port_name = ibmvfc_get_starget_port_name,
4123 .show_starget_port_name = 1,
4125 .get_starget_port_id = ibmvfc_get_starget_port_id,
4126 .show_starget_port_id = 1,
4130 * ibmvfc_module_init - Initialize the ibmvfc module
4133 * 0 on success / other on failure
4135 static int __init ibmvfc_module_init(void)
4139 if (!firmware_has_feature(FW_FEATURE_VIO))
4142 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4143 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4145 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4146 if (!ibmvfc_transport_template)
4149 rc = vio_register_driver(&ibmvfc_driver);
4151 fc_release_transport(ibmvfc_transport_template);
4156 * ibmvfc_module_exit - Teardown the ibmvfc module
4161 static void __exit ibmvfc_module_exit(void)
4163 vio_unregister_driver(&ibmvfc_driver);
4164 fc_release_transport(ibmvfc_transport_template);
4167 module_init(ibmvfc_module_init);
4168 module_exit(ibmvfc_module_exit);