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);
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_TRANSPORT_DISRUPTED, 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, 1, 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_ERROR, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 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_ERROR, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 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 *);
146 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
148 static const char *unknown_error = "unknown error";
150 #ifdef CONFIG_SCSI_IBMVFC_TRACE
152 * ibmvfc_trc_start - Log a start trace entry
153 * @evt: ibmvfc event struct
156 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
158 struct ibmvfc_host *vhost = evt->vhost;
159 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
160 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
161 struct ibmvfc_trace_entry *entry;
163 entry = &vhost->trace[vhost->trace_index++];
165 entry->time = jiffies;
166 entry->fmt = evt->crq.format;
167 entry->type = IBMVFC_TRC_START;
169 switch (entry->fmt) {
170 case IBMVFC_CMD_FORMAT:
171 entry->op_code = vfc_cmd->iu.cdb[0];
172 entry->scsi_id = vfc_cmd->tgt_scsi_id;
173 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
174 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
175 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
177 case IBMVFC_MAD_FORMAT:
178 entry->op_code = mad->opcode;
186 * ibmvfc_trc_end - Log an end trace entry
187 * @evt: ibmvfc event struct
190 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
192 struct ibmvfc_host *vhost = evt->vhost;
193 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
194 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
195 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
198 entry->time = jiffies;
199 entry->fmt = evt->crq.format;
200 entry->type = IBMVFC_TRC_END;
202 switch (entry->fmt) {
203 case IBMVFC_CMD_FORMAT:
204 entry->op_code = vfc_cmd->iu.cdb[0];
205 entry->scsi_id = vfc_cmd->tgt_scsi_id;
206 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
207 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
208 entry->u.end.status = vfc_cmd->status;
209 entry->u.end.error = vfc_cmd->error;
210 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
211 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
212 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
214 case IBMVFC_MAD_FORMAT:
215 entry->op_code = mad->opcode;
216 entry->u.end.status = mad->status;
225 #define ibmvfc_trc_start(evt) do { } while (0)
226 #define ibmvfc_trc_end(evt) do { } while (0)
230 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
231 * @status: status / error class
235 * index into cmd_status / -EINVAL on failure
237 static int ibmvfc_get_err_index(u16 status, u16 error)
241 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
242 if ((cmd_status[i].status & status) == cmd_status[i].status &&
243 cmd_status[i].error == error)
250 * ibmvfc_get_cmd_error - Find the error description for the fcp response
251 * @status: status / error class
255 * error description string
257 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
259 int rc = ibmvfc_get_err_index(status, error);
261 return cmd_status[rc].name;
262 return unknown_error;
266 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
267 * @vfc_cmd: ibmvfc command struct
270 * SCSI result value to return for completed command
272 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
275 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
276 int fc_rsp_len = rsp->fcp_rsp_len;
278 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
279 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
280 rsp->data.info.rsp_code))
281 return DID_ERROR << 16;
283 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
285 return rsp->scsi_status | (cmd_status[err].result << 16);
286 return rsp->scsi_status | (DID_ERROR << 16);
290 * ibmvfc_retry_cmd - Determine if error status is retryable
291 * @status: status / error class
295 * 1 if error should be retried / 0 if it should not
297 static int ibmvfc_retry_cmd(u16 status, u16 error)
299 int rc = ibmvfc_get_err_index(status, error);
302 return cmd_status[rc].retry;
306 static const char *unknown_fc_explain = "unknown fc explain";
308 static const struct {
312 { 0x00, "no additional explanation" },
313 { 0x01, "service parameter error - options" },
314 { 0x03, "service parameter error - initiator control" },
315 { 0x05, "service parameter error - recipient control" },
316 { 0x07, "service parameter error - received data field size" },
317 { 0x09, "service parameter error - concurrent seq" },
318 { 0x0B, "service parameter error - credit" },
319 { 0x0D, "invalid N_Port/F_Port_Name" },
320 { 0x0E, "invalid node/Fabric Name" },
321 { 0x0F, "invalid common service parameters" },
322 { 0x11, "invalid association header" },
323 { 0x13, "association header required" },
324 { 0x15, "invalid originator S_ID" },
325 { 0x17, "invalid OX_ID-RX-ID combination" },
326 { 0x19, "command (request) already in progress" },
327 { 0x1E, "N_Port Login requested" },
328 { 0x1F, "Invalid N_Port_ID" },
331 static const struct {
335 { 0x00, "no additional explanation" },
336 { 0x01, "port identifier not registered" },
337 { 0x02, "port name not registered" },
338 { 0x03, "node name not registered" },
339 { 0x04, "class of service not registered" },
340 { 0x06, "initial process associator not registered" },
341 { 0x07, "FC-4 TYPEs not registered" },
342 { 0x08, "symbolic port name not registered" },
343 { 0x09, "symbolic node name not registered" },
344 { 0x0A, "port type not registered" },
345 { 0xF0, "authorization exception" },
346 { 0xF1, "authentication exception" },
347 { 0xF2, "data base full" },
348 { 0xF3, "data base empty" },
349 { 0xF4, "processing request" },
350 { 0xF5, "unable to verify connection" },
351 { 0xF6, "devices not in a common zone" },
355 * ibmvfc_get_ls_explain - Return the FC Explain description text
356 * @status: FC Explain status
361 static const char *ibmvfc_get_ls_explain(u16 status)
365 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
366 if (ls_explain[i].fc_explain == status)
367 return ls_explain[i].name;
369 return unknown_fc_explain;
373 * ibmvfc_get_gs_explain - Return the FC Explain description text
374 * @status: FC Explain status
379 static const char *ibmvfc_get_gs_explain(u16 status)
383 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
384 if (gs_explain[i].fc_explain == status)
385 return gs_explain[i].name;
387 return unknown_fc_explain;
390 static const struct {
391 enum ibmvfc_fc_type fc_type;
394 { IBMVFC_FABRIC_REJECT, "fabric reject" },
395 { IBMVFC_PORT_REJECT, "port reject" },
396 { IBMVFC_LS_REJECT, "ELS reject" },
397 { IBMVFC_FABRIC_BUSY, "fabric busy" },
398 { IBMVFC_PORT_BUSY, "port busy" },
399 { IBMVFC_BASIC_REJECT, "basic reject" },
402 static const char *unknown_fc_type = "unknown fc type";
405 * ibmvfc_get_fc_type - Return the FC Type description text
406 * @status: FC Type error status
411 static const char *ibmvfc_get_fc_type(u16 status)
415 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
416 if (fc_type[i].fc_type == status)
417 return fc_type[i].name;
419 return unknown_fc_type;
423 * ibmvfc_set_tgt_action - Set the next init action for the target
424 * @tgt: ibmvfc target struct
425 * @action: action to perform
428 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
429 enum ibmvfc_target_action action)
431 switch (tgt->action) {
432 case IBMVFC_TGT_ACTION_DEL_RPORT:
435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
437 tgt->action = action;
443 * ibmvfc_set_host_state - Set the state for the host
444 * @vhost: ibmvfc host struct
445 * @state: state to set host to
448 * 0 if state changed / non-zero if not changed
450 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
451 enum ibmvfc_host_state state)
455 switch (vhost->state) {
456 case IBMVFC_HOST_OFFLINE:
460 vhost->state = state;
468 * ibmvfc_set_host_action - Set the next init action for the host
469 * @vhost: ibmvfc host struct
470 * @action: action to perform
473 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
474 enum ibmvfc_host_action action)
477 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
479 vhost->action = action;
481 case IBMVFC_HOST_ACTION_LOGO_WAIT:
482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
483 vhost->action = action;
485 case IBMVFC_HOST_ACTION_INIT_WAIT:
486 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
487 vhost->action = action;
489 case IBMVFC_HOST_ACTION_QUERY:
490 switch (vhost->action) {
491 case IBMVFC_HOST_ACTION_INIT_WAIT:
492 case IBMVFC_HOST_ACTION_NONE:
493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
494 vhost->action = action;
500 case IBMVFC_HOST_ACTION_TGT_INIT:
501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
502 vhost->action = action;
504 case IBMVFC_HOST_ACTION_LOGO:
505 case IBMVFC_HOST_ACTION_INIT:
506 case IBMVFC_HOST_ACTION_TGT_DEL:
507 case IBMVFC_HOST_ACTION_QUERY_TGTS:
508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
509 case IBMVFC_HOST_ACTION_NONE:
511 vhost->action = action;
517 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
518 * @vhost: ibmvfc host struct
523 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
525 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
526 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
527 scsi_block_requests(vhost->host);
528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
533 wake_up(&vhost->work_wait_q);
537 * ibmvfc_link_down - Handle a link down event from the adapter
538 * @vhost: ibmvfc host struct
539 * @state: ibmvfc host state to enter
542 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
543 enum ibmvfc_host_state state)
545 struct ibmvfc_target *tgt;
548 scsi_block_requests(vhost->host);
549 list_for_each_entry(tgt, &vhost->targets, queue)
550 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
551 ibmvfc_set_host_state(vhost, state);
552 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
553 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
554 wake_up(&vhost->work_wait_q);
559 * ibmvfc_init_host - Start host initialization
560 * @vhost: ibmvfc host struct
565 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
567 struct ibmvfc_target *tgt;
569 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
570 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
572 "Host initialization retries exceeded. Taking adapter offline\n");
573 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
578 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
579 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
580 vhost->async_crq.cur = 0;
582 list_for_each_entry(tgt, &vhost->targets, queue)
583 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
584 scsi_block_requests(vhost->host);
585 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
586 vhost->job_step = ibmvfc_npiv_login;
587 wake_up(&vhost->work_wait_q);
592 * ibmvfc_send_crq - Send a CRQ
593 * @vhost: ibmvfc host struct
594 * @word1: the first 64 bits of the data
595 * @word2: the second 64 bits of the data
598 * 0 on success / other on failure
600 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
602 struct vio_dev *vdev = to_vio_dev(vhost->dev);
603 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
607 * ibmvfc_send_crq_init - Send a CRQ init message
608 * @vhost: ibmvfc host struct
611 * 0 on success / other on failure
613 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
615 ibmvfc_dbg(vhost, "Sending CRQ init\n");
616 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
620 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
621 * @vhost: ibmvfc host struct
624 * 0 on success / other on failure
626 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
628 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
629 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
633 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
634 * @vhost: ibmvfc host struct
636 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
637 * the crq with the hypervisor.
639 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
642 struct vio_dev *vdev = to_vio_dev(vhost->dev);
643 struct ibmvfc_crq_queue *crq = &vhost->crq;
645 ibmvfc_dbg(vhost, "Releasing CRQ\n");
646 free_irq(vdev->irq, vhost);
647 tasklet_kill(&vhost->tasklet);
649 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
650 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
652 vhost->state = IBMVFC_NO_CRQ;
653 vhost->logged_in = 0;
654 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
655 free_page((unsigned long)crq->msgs);
659 * ibmvfc_reenable_crq_queue - reenables the CRQ
660 * @vhost: ibmvfc host struct
663 * 0 on success / other on failure
665 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
668 struct vio_dev *vdev = to_vio_dev(vhost->dev);
670 /* Re-enable the CRQ */
672 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
673 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
676 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
682 * ibmvfc_reset_crq - resets a crq after a failure
683 * @vhost: ibmvfc host struct
686 * 0 on success / other on failure
688 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
691 struct vio_dev *vdev = to_vio_dev(vhost->dev);
692 struct ibmvfc_crq_queue *crq = &vhost->crq;
696 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
697 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
699 vhost->state = IBMVFC_NO_CRQ;
700 vhost->logged_in = 0;
701 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
703 /* Clean out the queue */
704 memset(crq->msgs, 0, PAGE_SIZE);
707 /* And re-open it again */
708 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
709 crq->msg_token, PAGE_SIZE);
712 /* Adapter is good, but other end is not ready */
713 dev_warn(vhost->dev, "Partner adapter not ready\n");
715 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
721 * ibmvfc_valid_event - Determines if event is valid.
722 * @pool: event_pool that contains the event
723 * @evt: ibmvfc event to be checked for validity
726 * 1 if event is valid / 0 if event is not valid
728 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
729 struct ibmvfc_event *evt)
731 int index = evt - pool->events;
732 if (index < 0 || index >= pool->size) /* outside of bounds */
734 if (evt != pool->events + index) /* unaligned */
740 * ibmvfc_free_event - Free the specified event
741 * @evt: ibmvfc_event to be freed
744 static void ibmvfc_free_event(struct ibmvfc_event *evt)
746 struct ibmvfc_host *vhost = evt->vhost;
747 struct ibmvfc_event_pool *pool = &vhost->pool;
749 BUG_ON(!ibmvfc_valid_event(pool, evt));
750 BUG_ON(atomic_inc_return(&evt->free) != 1);
751 list_add_tail(&evt->queue, &vhost->free);
755 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
756 * @evt: ibmvfc event struct
758 * This function does not setup any error status, that must be done
759 * before this function gets called.
761 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
763 struct scsi_cmnd *cmnd = evt->cmnd;
766 scsi_dma_unmap(cmnd);
767 cmnd->scsi_done(cmnd);
771 complete(evt->eh_comp);
773 ibmvfc_free_event(evt);
777 * ibmvfc_fail_request - Fail request with specified error code
778 * @evt: ibmvfc event struct
779 * @error_code: error code to fail request with
784 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
787 evt->cmnd->result = (error_code << 16);
788 evt->done = ibmvfc_scsi_eh_done;
790 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
792 list_del(&evt->queue);
793 del_timer(&evt->timer);
799 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
800 * @vhost: ibmvfc host struct
801 * @error_code: error code to fail requests with
806 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
808 struct ibmvfc_event *evt, *pos;
810 ibmvfc_dbg(vhost, "Purging all requests\n");
811 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
812 ibmvfc_fail_request(evt, error_code);
816 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
817 * @vhost: struct ibmvfc host to reset
819 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
823 scsi_block_requests(vhost->host);
824 ibmvfc_purge_requests(vhost, DID_ERROR);
825 if ((rc = ibmvfc_reset_crq(vhost)) ||
826 (rc = ibmvfc_send_crq_init(vhost)) ||
827 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
828 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
829 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
831 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
835 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
836 * @vhost: struct ibmvfc host to reset
838 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
840 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
841 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
842 scsi_block_requests(vhost->host);
843 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
844 vhost->job_step = ibmvfc_npiv_logout;
845 wake_up(&vhost->work_wait_q);
847 ibmvfc_hard_reset_host(vhost);
851 * ibmvfc_reset_host - Reset the connection to the server
852 * @vhost: ibmvfc host struct
854 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
858 spin_lock_irqsave(vhost->host->host_lock, flags);
859 __ibmvfc_reset_host(vhost);
860 spin_unlock_irqrestore(vhost->host->host_lock, flags);
864 * ibmvfc_retry_host_init - Retry host initialization if allowed
865 * @vhost: ibmvfc host struct
867 * Returns: 1 if init will be retried / 0 if not
870 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
874 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
875 vhost->delay_init = 1;
876 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
878 "Host initialization retries exceeded. Taking adapter offline\n");
879 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
880 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
881 __ibmvfc_reset_host(vhost);
883 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
888 wake_up(&vhost->work_wait_q);
893 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
894 * @starget: scsi target struct
897 * ibmvfc_target struct / NULL if not found
899 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
901 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
902 struct ibmvfc_host *vhost = shost_priv(shost);
903 struct ibmvfc_target *tgt;
905 list_for_each_entry(tgt, &vhost->targets, queue)
906 if (tgt->target_id == starget->id) {
907 kref_get(&tgt->kref);
914 * ibmvfc_get_target - Find the specified scsi_target
915 * @starget: scsi target struct
918 * ibmvfc_target struct / NULL if not found
920 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
922 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
923 struct ibmvfc_target *tgt;
926 spin_lock_irqsave(shost->host_lock, flags);
927 tgt = __ibmvfc_get_target(starget);
928 spin_unlock_irqrestore(shost->host_lock, flags);
933 * ibmvfc_get_host_speed - Get host port speed
934 * @shost: scsi host struct
939 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
941 struct ibmvfc_host *vhost = shost_priv(shost);
944 spin_lock_irqsave(shost->host_lock, flags);
945 if (vhost->state == IBMVFC_ACTIVE) {
946 switch (vhost->login_buf->resp.link_speed / 100) {
948 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
951 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
954 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
957 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
960 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
963 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
966 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
967 vhost->login_buf->resp.link_speed / 100);
968 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
972 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
973 spin_unlock_irqrestore(shost->host_lock, flags);
977 * ibmvfc_get_host_port_state - Get host port state
978 * @shost: scsi host struct
983 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
985 struct ibmvfc_host *vhost = shost_priv(shost);
988 spin_lock_irqsave(shost->host_lock, flags);
989 switch (vhost->state) {
990 case IBMVFC_INITIALIZING:
992 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
994 case IBMVFC_LINK_DOWN:
995 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
997 case IBMVFC_LINK_DEAD:
998 case IBMVFC_HOST_OFFLINE:
999 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1002 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1005 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1008 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1009 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1012 spin_unlock_irqrestore(shost->host_lock, flags);
1016 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1017 * @rport: rport struct
1018 * @timeout: timeout value
1023 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1026 rport->dev_loss_tmo = timeout;
1028 rport->dev_loss_tmo = 1;
1032 * ibmvfc_release_tgt - Free memory allocated for a target
1033 * @kref: kref struct
1036 static void ibmvfc_release_tgt(struct kref *kref)
1038 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1043 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1044 * @starget: scsi target struct
1049 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1051 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1052 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1054 kref_put(&tgt->kref, ibmvfc_release_tgt);
1058 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1059 * @starget: scsi target struct
1064 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1066 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1067 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1069 kref_put(&tgt->kref, ibmvfc_release_tgt);
1073 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1074 * @starget: scsi target struct
1079 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1081 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1082 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1084 kref_put(&tgt->kref, ibmvfc_release_tgt);
1088 * ibmvfc_wait_while_resetting - Wait while the host resets
1089 * @vhost: ibmvfc host struct
1092 * 0 on success / other on failure
1094 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1096 long timeout = wait_event_timeout(vhost->init_wait_q,
1097 ((vhost->state == IBMVFC_ACTIVE ||
1098 vhost->state == IBMVFC_HOST_OFFLINE ||
1099 vhost->state == IBMVFC_LINK_DEAD) &&
1100 vhost->action == IBMVFC_HOST_ACTION_NONE),
1101 (init_timeout * HZ));
1103 return timeout ? 0 : -EIO;
1107 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1108 * @shost: scsi host struct
1111 * 0 on success / other on failure
1113 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1115 struct ibmvfc_host *vhost = shost_priv(shost);
1117 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1118 ibmvfc_reset_host(vhost);
1119 return ibmvfc_wait_while_resetting(vhost);
1123 * ibmvfc_gather_partition_info - Gather info about the LPAR
1128 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1130 struct device_node *rootdn;
1132 const unsigned int *num;
1134 rootdn = of_find_node_by_path("/");
1138 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1140 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1141 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1143 vhost->partition_number = *num;
1144 of_node_put(rootdn);
1148 * ibmvfc_set_login_info - Setup info for NPIV login
1149 * @vhost: ibmvfc host struct
1154 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1156 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1157 struct device_node *of_node = vhost->dev->archdata.of_node;
1158 const char *location;
1160 memset(login_info, 0, sizeof(*login_info));
1162 login_info->ostype = IBMVFC_OS_LINUX;
1163 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1164 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1165 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1166 login_info->partition_num = vhost->partition_number;
1167 login_info->vfc_frame_version = 1;
1168 login_info->fcp_version = 3;
1169 login_info->flags = IBMVFC_FLUSH_ON_HALT;
1170 if (vhost->client_migrated)
1171 login_info->flags |= IBMVFC_CLIENT_MIGRATED;
1173 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1174 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1175 login_info->async.va = vhost->async_crq.msg_token;
1176 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
1177 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1178 strncpy(login_info->device_name,
1179 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1181 location = of_get_property(of_node, "ibm,loc-code", NULL);
1182 location = location ? location : dev_name(vhost->dev);
1183 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1187 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1188 * @vhost: ibmvfc host who owns the event pool
1190 * Returns zero on success.
1192 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1195 struct ibmvfc_event_pool *pool = &vhost->pool;
1198 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1199 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1203 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1204 pool->size * sizeof(*pool->iu_storage),
1205 &pool->iu_token, 0);
1207 if (!pool->iu_storage) {
1208 kfree(pool->events);
1212 for (i = 0; i < pool->size; ++i) {
1213 struct ibmvfc_event *evt = &pool->events[i];
1214 atomic_set(&evt->free, 1);
1215 evt->crq.valid = 0x80;
1216 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1217 evt->xfer_iu = pool->iu_storage + i;
1219 evt->ext_list = NULL;
1220 list_add_tail(&evt->queue, &vhost->free);
1228 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1229 * @vhost: ibmvfc host who owns the event pool
1232 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1235 struct ibmvfc_event_pool *pool = &vhost->pool;
1238 for (i = 0; i < pool->size; ++i) {
1239 list_del(&pool->events[i].queue);
1240 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1241 if (pool->events[i].ext_list)
1242 dma_pool_free(vhost->sg_pool,
1243 pool->events[i].ext_list,
1244 pool->events[i].ext_list_token);
1247 kfree(pool->events);
1248 dma_free_coherent(vhost->dev,
1249 pool->size * sizeof(*pool->iu_storage),
1250 pool->iu_storage, pool->iu_token);
1255 * ibmvfc_get_event - Gets the next free event in pool
1256 * @vhost: ibmvfc host struct
1258 * Returns a free event from the pool.
1260 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1262 struct ibmvfc_event *evt;
1264 BUG_ON(list_empty(&vhost->free));
1265 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1266 atomic_set(&evt->free, 0);
1267 list_del(&evt->queue);
1272 * ibmvfc_init_event - Initialize fields in an event struct that are always
1275 * @done: Routine to call when the event is responded to
1276 * @format: SRP or MAD format
1278 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1279 void (*done) (struct ibmvfc_event *), u8 format)
1282 evt->sync_iu = NULL;
1283 evt->crq.format = format;
1285 evt->eh_comp = NULL;
1289 * ibmvfc_map_sg_list - Initialize scatterlist
1290 * @scmd: scsi command struct
1291 * @nseg: number of scatterlist segments
1292 * @md: memory descriptor list to initialize
1294 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1295 struct srp_direct_buf *md)
1298 struct scatterlist *sg;
1300 scsi_for_each_sg(scmd, sg, nseg, i) {
1301 md[i].va = sg_dma_address(sg);
1302 md[i].len = sg_dma_len(sg);
1308 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1309 * @scmd: Scsi_Cmnd with the scatterlist
1310 * @evt: ibmvfc event struct
1311 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1312 * @dev: device for which to map dma memory
1315 * 0 on success / non-zero on failure
1317 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1318 struct ibmvfc_event *evt,
1319 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1323 struct srp_direct_buf *data = &vfc_cmd->ioba;
1324 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1326 sg_mapped = scsi_dma_map(scmd);
1328 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1330 } else if (unlikely(sg_mapped < 0)) {
1331 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1332 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1336 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1337 vfc_cmd->flags |= IBMVFC_WRITE;
1338 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1340 vfc_cmd->flags |= IBMVFC_READ;
1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1344 if (sg_mapped == 1) {
1345 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1349 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1351 if (!evt->ext_list) {
1352 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1353 &evt->ext_list_token);
1355 if (!evt->ext_list) {
1356 scsi_dma_unmap(scmd);
1357 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1358 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1363 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1365 data->va = evt->ext_list_token;
1366 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1372 * ibmvfc_timeout - Internal command timeout handler
1373 * @evt: struct ibmvfc_event that timed out
1375 * Called when an internally generated command times out
1377 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1379 struct ibmvfc_host *vhost = evt->vhost;
1380 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1381 ibmvfc_reset_host(vhost);
1385 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1386 * @evt: event to be sent
1387 * @vhost: ibmvfc host struct
1388 * @timeout: timeout in seconds - 0 means do not time command
1390 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1392 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1393 struct ibmvfc_host *vhost, unsigned long timeout)
1395 u64 *crq_as_u64 = (u64 *) &evt->crq;
1398 /* Copy the IU into the transfer area */
1399 *evt->xfer_iu = evt->iu;
1400 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1401 evt->xfer_iu->cmd.tag = (u64)evt;
1402 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1403 evt->xfer_iu->mad_common.tag = (u64)evt;
1407 list_add_tail(&evt->queue, &vhost->sent);
1408 init_timer(&evt->timer);
1411 evt->timer.data = (unsigned long) evt;
1412 evt->timer.expires = jiffies + (timeout * HZ);
1413 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1414 add_timer(&evt->timer);
1419 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1420 list_del(&evt->queue);
1421 del_timer(&evt->timer);
1423 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1424 * Firmware will send a CRQ with a transport event (0xFF) to
1425 * tell this client what has happened to the transport. This
1426 * will be handled in ibmvfc_handle_crq()
1428 if (rc == H_CLOSED) {
1429 if (printk_ratelimit())
1430 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1432 scsi_dma_unmap(evt->cmnd);
1433 ibmvfc_free_event(evt);
1434 return SCSI_MLQUEUE_HOST_BUSY;
1437 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1439 evt->cmnd->result = DID_ERROR << 16;
1440 evt->done = ibmvfc_scsi_eh_done;
1442 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1446 ibmvfc_trc_start(evt);
1452 * ibmvfc_log_error - Log an error for the failed command if appropriate
1453 * @evt: ibmvfc event to log
1456 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1458 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1459 struct ibmvfc_host *vhost = evt->vhost;
1460 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1461 struct scsi_cmnd *cmnd = evt->cmnd;
1462 const char *err = unknown_error;
1463 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1468 logerr = cmd_status[index].log;
1469 err = cmd_status[index].name;
1472 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1475 if (rsp->flags & FCP_RSP_LEN_VALID)
1476 rsp_code = rsp->data.info.rsp_code;
1478 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1479 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1480 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1481 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1485 * ibmvfc_relogin - Log back into the specified device
1486 * @sdev: scsi device struct
1489 static void ibmvfc_relogin(struct scsi_device *sdev)
1491 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1492 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1493 struct ibmvfc_target *tgt;
1495 list_for_each_entry(tgt, &vhost->targets, queue) {
1496 if (rport == tgt->rport) {
1497 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1502 ibmvfc_reinit_host(vhost);
1506 * ibmvfc_scsi_done - Handle responses from commands
1507 * @evt: ibmvfc event to be handled
1509 * Used as a callback when sending scsi cmds.
1511 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1513 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1514 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1515 struct scsi_cmnd *cmnd = evt->cmnd;
1517 u32 sense_len = rsp->fcp_sense_len;
1520 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1521 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1522 else if (rsp->flags & FCP_RESID_UNDER)
1523 scsi_set_resid(cmnd, rsp->fcp_resid);
1525 scsi_set_resid(cmnd, 0);
1527 if (vfc_cmd->status) {
1528 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1530 if (rsp->flags & FCP_RSP_LEN_VALID)
1531 rsp_len = rsp->fcp_rsp_len;
1532 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1533 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1534 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1535 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1536 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
1537 ibmvfc_relogin(cmnd->device);
1539 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1540 cmnd->result = (DID_ERROR << 16);
1542 ibmvfc_log_error(evt);
1545 if (!cmnd->result &&
1546 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1547 cmnd->result = (DID_ERROR << 16);
1549 scsi_dma_unmap(cmnd);
1550 cmnd->scsi_done(cmnd);
1554 complete(evt->eh_comp);
1556 ibmvfc_free_event(evt);
1560 * ibmvfc_host_chkready - Check if the host can accept commands
1561 * @vhost: struct ibmvfc host
1564 * 1 if host can accept command / 0 if not
1566 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1570 switch (vhost->state) {
1571 case IBMVFC_LINK_DEAD:
1572 case IBMVFC_HOST_OFFLINE:
1573 result = DID_NO_CONNECT << 16;
1576 case IBMVFC_INITIALIZING:
1578 case IBMVFC_LINK_DOWN:
1579 result = DID_REQUEUE << 16;
1590 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1591 * @cmnd: struct scsi_cmnd to be executed
1592 * @done: Callback function to be called when cmnd is completed
1595 * 0 on success / other on failure
1597 static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1598 void (*done) (struct scsi_cmnd *))
1600 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1601 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1602 struct ibmvfc_cmd *vfc_cmd;
1603 struct ibmvfc_event *evt;
1607 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1608 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1614 cmnd->result = (DID_OK << 16);
1615 evt = ibmvfc_get_event(vhost);
1616 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1618 cmnd->scsi_done = done;
1619 vfc_cmd = &evt->iu.cmd;
1620 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1621 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1622 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1623 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1624 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1625 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1626 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1627 vfc_cmd->tgt_scsi_id = rport->port_id;
1628 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1629 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1630 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1632 if (scsi_populate_tag_msg(cmnd, tag)) {
1633 vfc_cmd->task_tag = tag[1];
1635 case MSG_SIMPLE_TAG:
1636 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1639 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1641 case MSG_ORDERED_TAG:
1642 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1647 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1648 return ibmvfc_send_event(evt, vhost, 0);
1650 ibmvfc_free_event(evt);
1652 return SCSI_MLQUEUE_HOST_BUSY;
1654 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1655 scmd_printk(KERN_ERR, cmnd,
1656 "Failed to map DMA buffer for command. rc=%d\n", rc);
1658 cmnd->result = DID_ERROR << 16;
1664 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1665 * @evt: ibmvfc event struct
1668 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1670 /* copy the response back */
1672 *evt->sync_iu = *evt->xfer_iu;
1674 complete(&evt->comp);
1678 * ibmvfc_reset_device - Reset the device with the specified reset type
1679 * @sdev: scsi device to reset
1681 * @desc: reset type description for log messages
1684 * 0 on success / other on failure
1686 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1688 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1689 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1690 struct ibmvfc_cmd *tmf;
1691 struct ibmvfc_event *evt = NULL;
1692 union ibmvfc_iu rsp_iu;
1693 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1694 int rsp_rc = -EBUSY;
1695 unsigned long flags;
1698 spin_lock_irqsave(vhost->host->host_lock, flags);
1699 if (vhost->state == IBMVFC_ACTIVE) {
1700 evt = ibmvfc_get_event(vhost);
1701 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1704 memset(tmf, 0, sizeof(*tmf));
1705 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1706 tmf->resp.len = sizeof(tmf->rsp);
1707 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1708 tmf->payload_len = sizeof(tmf->iu);
1709 tmf->resp_len = sizeof(tmf->rsp);
1710 tmf->cancel_key = (unsigned long)sdev->hostdata;
1711 tmf->tgt_scsi_id = rport->port_id;
1712 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1713 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1714 tmf->iu.tmf_flags = type;
1715 evt->sync_iu = &rsp_iu;
1717 init_completion(&evt->comp);
1718 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1720 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1723 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1728 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1729 wait_for_completion(&evt->comp);
1731 if (rsp_iu.cmd.status)
1732 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
1735 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1736 rsp_code = fc_rsp->data.info.rsp_code;
1738 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1739 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1740 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1741 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1742 fc_rsp->scsi_status);
1745 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1747 spin_lock_irqsave(vhost->host->host_lock, flags);
1748 ibmvfc_free_event(evt);
1749 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1754 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1755 * @sdev: scsi device to abort commands
1757 * This sends an Abort Task Set to the VIOS for the specified device. This does
1758 * NOT send any cancel to the VIOS. That must be done separately.
1761 * 0 on success / other on failure
1763 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1765 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1766 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1767 struct ibmvfc_cmd *tmf;
1768 struct ibmvfc_event *evt, *found_evt;
1769 union ibmvfc_iu rsp_iu;
1770 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1771 int rsp_rc = -EBUSY;
1772 unsigned long flags;
1775 spin_lock_irqsave(vhost->host->host_lock, flags);
1777 list_for_each_entry(evt, &vhost->sent, queue) {
1778 if (evt->cmnd && evt->cmnd->device == sdev) {
1785 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1786 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1787 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1791 if (vhost->state == IBMVFC_ACTIVE) {
1792 evt = ibmvfc_get_event(vhost);
1793 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1796 memset(tmf, 0, sizeof(*tmf));
1797 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1798 tmf->resp.len = sizeof(tmf->rsp);
1799 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1800 tmf->payload_len = sizeof(tmf->iu);
1801 tmf->resp_len = sizeof(tmf->rsp);
1802 tmf->cancel_key = (unsigned long)sdev->hostdata;
1803 tmf->tgt_scsi_id = rport->port_id;
1804 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1805 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1806 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1807 evt->sync_iu = &rsp_iu;
1809 init_completion(&evt->comp);
1810 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1813 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1816 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1820 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1821 wait_for_completion(&evt->comp);
1823 if (rsp_iu.cmd.status)
1824 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
1827 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1828 rsp_code = fc_rsp->data.info.rsp_code;
1830 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1831 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1832 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1833 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1834 fc_rsp->scsi_status);
1837 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1839 spin_lock_irqsave(vhost->host->host_lock, flags);
1840 ibmvfc_free_event(evt);
1841 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1846 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1847 * @sdev: scsi device to cancel commands
1848 * @type: type of error recovery being performed
1850 * This sends a cancel to the VIOS for the specified device. This does
1851 * NOT send any abort to the actual device. That must be done separately.
1854 * 0 on success / other on failure
1856 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1858 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1859 struct scsi_target *starget = scsi_target(sdev);
1860 struct fc_rport *rport = starget_to_rport(starget);
1861 struct ibmvfc_tmf *tmf;
1862 struct ibmvfc_event *evt, *found_evt;
1863 union ibmvfc_iu rsp;
1864 int rsp_rc = -EBUSY;
1865 unsigned long flags;
1869 spin_lock_irqsave(vhost->host->host_lock, flags);
1871 list_for_each_entry(evt, &vhost->sent, queue) {
1872 if (evt->cmnd && evt->cmnd->device == sdev) {
1879 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1880 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1881 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1885 if (vhost->state == IBMVFC_ACTIVE) {
1886 evt = ibmvfc_get_event(vhost);
1887 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1890 memset(tmf, 0, sizeof(*tmf));
1891 tmf->common.version = 1;
1892 tmf->common.opcode = IBMVFC_TMF_MAD;
1893 tmf->common.length = sizeof(*tmf);
1894 tmf->scsi_id = rport->port_id;
1895 int_to_scsilun(sdev->lun, &tmf->lun);
1896 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1897 tmf->cancel_key = (unsigned long)sdev->hostdata;
1898 tmf->my_cancel_key = (unsigned long)starget->hostdata;
1900 evt->sync_iu = &rsp;
1901 init_completion(&evt->comp);
1902 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1905 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1908 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1912 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1914 wait_for_completion(&evt->comp);
1915 status = rsp.mad_common.status;
1916 spin_lock_irqsave(vhost->host->host_lock, flags);
1917 ibmvfc_free_event(evt);
1918 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1920 if (status != IBMVFC_MAD_SUCCESS) {
1921 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1925 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1930 * ibmvfc_match_target - Match function for specified target
1931 * @evt: ibmvfc event struct
1932 * @device: device to match (starget)
1935 * 1 if event matches starget / 0 if event does not match starget
1937 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
1939 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
1945 * ibmvfc_match_lun - Match function for specified LUN
1946 * @evt: ibmvfc event struct
1947 * @device: device to match (sdev)
1950 * 1 if event matches sdev / 0 if event does not match sdev
1952 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
1954 if (evt->cmnd && evt->cmnd->device == device)
1960 * ibmvfc_wait_for_ops - Wait for ops to complete
1961 * @vhost: ibmvfc host struct
1962 * @device: device to match (starget or sdev)
1963 * @match: match function
1968 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
1969 int (*match) (struct ibmvfc_event *, void *))
1971 struct ibmvfc_event *evt;
1972 DECLARE_COMPLETION_ONSTACK(comp);
1974 unsigned long flags;
1975 signed long timeout = init_timeout * HZ;
1980 spin_lock_irqsave(vhost->host->host_lock, flags);
1981 list_for_each_entry(evt, &vhost->sent, queue) {
1982 if (match(evt, device)) {
1983 evt->eh_comp = ∁
1987 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1990 timeout = wait_for_completion_timeout(&comp, timeout);
1994 spin_lock_irqsave(vhost->host->host_lock, flags);
1995 list_for_each_entry(evt, &vhost->sent, queue) {
1996 if (match(evt, device)) {
1997 evt->eh_comp = NULL;
2001 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2003 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2005 return wait ? FAILED : SUCCESS;
2015 * ibmvfc_eh_abort_handler - Abort a command
2016 * @cmd: scsi command to abort
2021 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2023 struct scsi_device *sdev = cmd->device;
2024 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2025 int cancel_rc, abort_rc;
2029 ibmvfc_wait_while_resetting(vhost);
2030 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2031 abort_rc = ibmvfc_abort_task_set(sdev);
2033 if (!cancel_rc && !abort_rc)
2034 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2041 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2042 * @cmd: scsi command struct
2047 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2049 struct scsi_device *sdev = cmd->device;
2050 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2051 int cancel_rc, reset_rc;
2055 ibmvfc_wait_while_resetting(vhost);
2056 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2057 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2059 if (!cancel_rc && !reset_rc)
2060 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2067 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2068 * @sdev: scsi device struct
2069 * @data: return code
2072 static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
2074 unsigned long *rc = data;
2075 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2079 * ibmvfc_dev_abort_all - Device iterated abort task set function
2080 * @sdev: scsi device struct
2081 * @data: return code
2084 static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2086 unsigned long *rc = data;
2087 *rc |= ibmvfc_abort_task_set(sdev);
2091 * ibmvfc_eh_target_reset_handler - Reset the target
2092 * @cmd: scsi command struct
2097 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2099 struct scsi_device *sdev = cmd->device;
2100 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2101 struct scsi_target *starget = scsi_target(sdev);
2104 unsigned long cancel_rc = 0;
2107 ibmvfc_wait_while_resetting(vhost);
2108 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2109 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2111 if (!cancel_rc && !reset_rc)
2112 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2119 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2120 * @cmd: struct scsi_cmnd having problems
2123 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2126 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2128 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2129 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2130 return rc ? FAILED : SUCCESS;
2134 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2135 * @rport: rport struct
2140 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2142 struct scsi_target *starget = to_scsi_target(&rport->dev);
2143 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2144 struct ibmvfc_host *vhost = shost_priv(shost);
2145 unsigned long cancel_rc = 0;
2146 unsigned long abort_rc = 0;
2150 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2151 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2153 if (!cancel_rc && !abort_rc)
2154 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2157 ibmvfc_issue_fc_host_lip(shost);
2161 static const struct {
2162 enum ibmvfc_async_event ae;
2165 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2166 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2167 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2168 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2169 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2170 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2171 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2172 { IBMVFC_AE_LINK_UP, "Link Up" },
2173 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2174 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2175 { IBMVFC_AE_HALT, "Halt" },
2176 { IBMVFC_AE_RESUME, "Resume" },
2177 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2180 static const char *unknown_ae = "Unknown async";
2183 * ibmvfc_get_ae_desc - Get text description for async event
2187 static const char *ibmvfc_get_ae_desc(u64 ae)
2191 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2192 if (ae_desc[i].ae == ae)
2193 return ae_desc[i].desc;
2199 * ibmvfc_handle_async - Handle an async event from the adapter
2200 * @crq: crq to process
2201 * @vhost: ibmvfc host struct
2204 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2205 struct ibmvfc_host *vhost)
2207 const char *desc = ibmvfc_get_ae_desc(crq->event);
2208 struct ibmvfc_target *tgt;
2210 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2211 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
2213 switch (crq->event) {
2214 case IBMVFC_AE_RESUME:
2215 switch (crq->link_state) {
2216 case IBMVFC_AE_LS_LINK_DOWN:
2217 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2219 case IBMVFC_AE_LS_LINK_DEAD:
2220 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2222 case IBMVFC_AE_LS_LINK_UP:
2223 case IBMVFC_AE_LS_LINK_BOUNCED:
2225 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2226 vhost->delay_init = 1;
2227 __ibmvfc_reset_host(vhost);
2232 case IBMVFC_AE_LINK_UP:
2233 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2234 vhost->delay_init = 1;
2235 __ibmvfc_reset_host(vhost);
2237 case IBMVFC_AE_SCN_FABRIC:
2238 case IBMVFC_AE_SCN_DOMAIN:
2239 vhost->events_to_log |= IBMVFC_AE_RSCN;
2240 vhost->delay_init = 1;
2241 __ibmvfc_reset_host(vhost);
2243 case IBMVFC_AE_SCN_NPORT:
2244 case IBMVFC_AE_SCN_GROUP:
2245 vhost->events_to_log |= IBMVFC_AE_RSCN;
2246 ibmvfc_reinit_host(vhost);
2248 case IBMVFC_AE_ELS_LOGO:
2249 case IBMVFC_AE_ELS_PRLO:
2250 case IBMVFC_AE_ELS_PLOGI:
2251 list_for_each_entry(tgt, &vhost->targets, queue) {
2252 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2254 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id)
2256 if (crq->wwpn && tgt->ids.port_name != crq->wwpn)
2258 if (crq->node_name && tgt->ids.node_name != crq->node_name)
2260 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO)
2262 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) {
2263 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2264 ibmvfc_reinit_host(vhost);
2268 case IBMVFC_AE_LINK_DOWN:
2269 case IBMVFC_AE_ADAPTER_FAILED:
2270 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2272 case IBMVFC_AE_LINK_DEAD:
2273 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2275 case IBMVFC_AE_HALT:
2276 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2279 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2285 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2286 * @crq: Command/Response queue
2287 * @vhost: ibmvfc host struct
2290 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2293 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2295 switch (crq->valid) {
2296 case IBMVFC_CRQ_INIT_RSP:
2297 switch (crq->format) {
2298 case IBMVFC_CRQ_INIT:
2299 dev_info(vhost->dev, "Partner initialized\n");
2300 /* Send back a response */
2301 rc = ibmvfc_send_crq_init_complete(vhost);
2303 ibmvfc_init_host(vhost);
2305 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2307 case IBMVFC_CRQ_INIT_COMPLETE:
2308 dev_info(vhost->dev, "Partner initialization complete\n");
2309 ibmvfc_init_host(vhost);
2312 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2315 case IBMVFC_CRQ_XPORT_EVENT:
2316 vhost->state = IBMVFC_NO_CRQ;
2317 vhost->logged_in = 0;
2318 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2319 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2320 /* We need to re-setup the interpartition connection */
2321 dev_info(vhost->dev, "Re-enabling adapter\n");
2322 vhost->client_migrated = 1;
2323 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2324 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2325 (rc = ibmvfc_send_crq_init(vhost))) {
2326 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2327 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2329 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2331 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2333 ibmvfc_purge_requests(vhost, DID_ERROR);
2334 if ((rc = ibmvfc_reset_crq(vhost)) ||
2335 (rc = ibmvfc_send_crq_init(vhost))) {
2336 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2337 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2339 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2342 case IBMVFC_CRQ_CMD_RSP:
2345 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2349 if (crq->format == IBMVFC_ASYNC_EVENT)
2352 /* The only kind of payload CRQs we should get are responses to
2353 * things we send. Make sure this response is to something we
2356 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2357 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2362 if (unlikely(atomic_read(&evt->free))) {
2363 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2368 del_timer(&evt->timer);
2369 list_del(&evt->queue);
2370 ibmvfc_trc_end(evt);
2375 * ibmvfc_scan_finished - Check if the device scan is done.
2376 * @shost: scsi host struct
2377 * @time: current elapsed time
2380 * 0 if scan is not done / 1 if scan is done
2382 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2384 unsigned long flags;
2385 struct ibmvfc_host *vhost = shost_priv(shost);
2388 spin_lock_irqsave(shost->host_lock, flags);
2389 if (time >= (init_timeout * HZ)) {
2390 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2391 "continuing initialization\n", init_timeout);
2395 if (vhost->scan_complete)
2397 spin_unlock_irqrestore(shost->host_lock, flags);
2402 * ibmvfc_slave_alloc - Setup the device's task set value
2403 * @sdev: struct scsi_device device to configure
2405 * Set the device's task set value so that error handling works as
2409 * 0 on success / -ENXIO if device does not exist
2411 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2413 struct Scsi_Host *shost = sdev->host;
2414 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2415 struct ibmvfc_host *vhost = shost_priv(shost);
2416 unsigned long flags = 0;
2418 if (!rport || fc_remote_port_chkready(rport))
2421 spin_lock_irqsave(shost->host_lock, flags);
2422 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2423 spin_unlock_irqrestore(shost->host_lock, flags);
2428 * ibmvfc_target_alloc - Setup the target's task set value
2429 * @starget: struct scsi_target
2431 * Set the target's task set value so that error handling works as
2435 * 0 on success / -ENXIO if device does not exist
2437 static int ibmvfc_target_alloc(struct scsi_target *starget)
2439 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2440 struct ibmvfc_host *vhost = shost_priv(shost);
2441 unsigned long flags = 0;
2443 spin_lock_irqsave(shost->host_lock, flags);
2444 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2445 spin_unlock_irqrestore(shost->host_lock, flags);
2450 * ibmvfc_slave_configure - Configure the device
2451 * @sdev: struct scsi_device device to configure
2453 * Enable allow_restart for a device if it is a disk. Adjust the
2454 * queue_depth here also.
2459 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2461 struct Scsi_Host *shost = sdev->host;
2462 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2463 unsigned long flags = 0;
2465 spin_lock_irqsave(shost->host_lock, flags);
2466 if (sdev->type == TYPE_DISK)
2467 sdev->allow_restart = 1;
2469 if (sdev->tagged_supported) {
2470 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2471 scsi_activate_tcq(sdev, sdev->queue_depth);
2473 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2475 rport->dev_loss_tmo = dev_loss_tmo;
2476 spin_unlock_irqrestore(shost->host_lock, flags);
2481 * ibmvfc_change_queue_depth - Change the device's queue depth
2482 * @sdev: scsi device struct
2483 * @qdepth: depth to set
2488 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2490 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2491 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2493 scsi_adjust_queue_depth(sdev, 0, qdepth);
2494 return sdev->queue_depth;
2498 * ibmvfc_change_queue_type - Change the device's queue type
2499 * @sdev: scsi device struct
2500 * @tag_type: type of tags to use
2503 * actual queue type set
2505 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2507 if (sdev->tagged_supported) {
2508 scsi_set_tag_type(sdev, tag_type);
2511 scsi_activate_tcq(sdev, sdev->queue_depth);
2513 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2520 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2521 struct device_attribute *attr, char *buf)
2523 struct Scsi_Host *shost = class_to_shost(dev);
2524 struct ibmvfc_host *vhost = shost_priv(shost);
2526 return snprintf(buf, PAGE_SIZE, "%s\n",
2527 vhost->login_buf->resp.partition_name);
2530 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2531 struct device_attribute *attr, char *buf)
2533 struct Scsi_Host *shost = class_to_shost(dev);
2534 struct ibmvfc_host *vhost = shost_priv(shost);
2536 return snprintf(buf, PAGE_SIZE, "%s\n",
2537 vhost->login_buf->resp.device_name);
2540 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2541 struct device_attribute *attr, char *buf)
2543 struct Scsi_Host *shost = class_to_shost(dev);
2544 struct ibmvfc_host *vhost = shost_priv(shost);
2546 return snprintf(buf, PAGE_SIZE, "%s\n",
2547 vhost->login_buf->resp.port_loc_code);
2550 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2551 struct device_attribute *attr, char *buf)
2553 struct Scsi_Host *shost = class_to_shost(dev);
2554 struct ibmvfc_host *vhost = shost_priv(shost);
2556 return snprintf(buf, PAGE_SIZE, "%s\n",
2557 vhost->login_buf->resp.drc_name);
2560 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2561 struct device_attribute *attr, char *buf)
2563 struct Scsi_Host *shost = class_to_shost(dev);
2564 struct ibmvfc_host *vhost = shost_priv(shost);
2565 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2568 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2569 struct device_attribute *attr, char *buf)
2571 struct Scsi_Host *shost = class_to_shost(dev);
2572 struct ibmvfc_host *vhost = shost_priv(shost);
2573 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2577 * ibmvfc_show_log_level - Show the adapter's error logging level
2578 * @dev: class device struct
2582 * number of bytes printed to buffer
2584 static ssize_t ibmvfc_show_log_level(struct device *dev,
2585 struct device_attribute *attr, char *buf)
2587 struct Scsi_Host *shost = class_to_shost(dev);
2588 struct ibmvfc_host *vhost = shost_priv(shost);
2589 unsigned long flags = 0;
2592 spin_lock_irqsave(shost->host_lock, flags);
2593 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2594 spin_unlock_irqrestore(shost->host_lock, flags);
2599 * ibmvfc_store_log_level - Change the adapter's error logging level
2600 * @dev: class device struct
2604 * number of bytes printed to buffer
2606 static ssize_t ibmvfc_store_log_level(struct device *dev,
2607 struct device_attribute *attr,
2608 const char *buf, size_t count)
2610 struct Scsi_Host *shost = class_to_shost(dev);
2611 struct ibmvfc_host *vhost = shost_priv(shost);
2612 unsigned long flags = 0;
2614 spin_lock_irqsave(shost->host_lock, flags);
2615 vhost->log_level = simple_strtoul(buf, NULL, 10);
2616 spin_unlock_irqrestore(shost->host_lock, flags);
2620 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
2621 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
2622 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
2623 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
2624 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
2625 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
2626 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
2627 ibmvfc_show_log_level, ibmvfc_store_log_level);
2629 #ifdef CONFIG_SCSI_IBMVFC_TRACE
2631 * ibmvfc_read_trace - Dump the adapter trace
2632 * @kobj: kobject struct
2633 * @bin_attr: bin_attribute struct
2636 * @count: buffer size
2639 * number of bytes printed to buffer
2641 static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2642 struct bin_attribute *bin_attr,
2643 char *buf, loff_t off, size_t count)
2645 struct device *dev = container_of(kobj, struct device, kobj);
2646 struct Scsi_Host *shost = class_to_shost(dev);
2647 struct ibmvfc_host *vhost = shost_priv(shost);
2648 unsigned long flags = 0;
2649 int size = IBMVFC_TRACE_SIZE;
2650 char *src = (char *)vhost->trace;
2654 if (off + count > size) {
2659 spin_lock_irqsave(shost->host_lock, flags);
2660 memcpy(buf, &src[off], count);
2661 spin_unlock_irqrestore(shost->host_lock, flags);
2665 static struct bin_attribute ibmvfc_trace_attr = {
2671 .read = ibmvfc_read_trace,
2675 static struct device_attribute *ibmvfc_attrs[] = {
2676 &dev_attr_partition_name,
2677 &dev_attr_device_name,
2678 &dev_attr_port_loc_code,
2680 &dev_attr_npiv_version,
2681 &dev_attr_capabilities,
2682 &dev_attr_log_level,
2686 static struct scsi_host_template driver_template = {
2687 .module = THIS_MODULE,
2688 .name = "IBM POWER Virtual FC Adapter",
2689 .proc_name = IBMVFC_NAME,
2690 .queuecommand = ibmvfc_queuecommand,
2691 .eh_abort_handler = ibmvfc_eh_abort_handler,
2692 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2693 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2694 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2695 .slave_alloc = ibmvfc_slave_alloc,
2696 .slave_configure = ibmvfc_slave_configure,
2697 .target_alloc = ibmvfc_target_alloc,
2698 .scan_finished = ibmvfc_scan_finished,
2699 .change_queue_depth = ibmvfc_change_queue_depth,
2700 .change_queue_type = ibmvfc_change_queue_type,
2702 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2704 .sg_tablesize = SG_ALL,
2705 .max_sectors = IBMVFC_MAX_SECTORS,
2706 .use_clustering = ENABLE_CLUSTERING,
2707 .shost_attrs = ibmvfc_attrs,
2711 * ibmvfc_next_async_crq - Returns the next entry in async queue
2712 * @vhost: ibmvfc host struct
2715 * Pointer to next entry in queue / NULL if empty
2717 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2719 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2720 struct ibmvfc_async_crq *crq;
2722 crq = &async_crq->msgs[async_crq->cur];
2723 if (crq->valid & 0x80) {
2724 if (++async_crq->cur == async_crq->size)
2733 * ibmvfc_next_crq - Returns the next entry in message queue
2734 * @vhost: ibmvfc host struct
2737 * Pointer to next entry in queue / NULL if empty
2739 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2741 struct ibmvfc_crq_queue *queue = &vhost->crq;
2742 struct ibmvfc_crq *crq;
2744 crq = &queue->msgs[queue->cur];
2745 if (crq->valid & 0x80) {
2746 if (++queue->cur == queue->size)
2755 * ibmvfc_interrupt - Interrupt handler
2756 * @irq: number of irq to handle, not used
2757 * @dev_instance: ibmvfc_host that received interrupt
2762 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2764 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
2765 unsigned long flags;
2767 spin_lock_irqsave(vhost->host->host_lock, flags);
2768 vio_disable_interrupts(to_vio_dev(vhost->dev));
2769 tasklet_schedule(&vhost->tasklet);
2770 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2775 * ibmvfc_tasklet - Interrupt handler tasklet
2776 * @data: ibmvfc host struct
2781 static void ibmvfc_tasklet(void *data)
2783 struct ibmvfc_host *vhost = data;
2784 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2785 struct ibmvfc_crq *crq;
2786 struct ibmvfc_async_crq *async;
2787 unsigned long flags;
2790 spin_lock_irqsave(vhost->host->host_lock, flags);
2792 /* Pull all the valid messages off the async CRQ */
2793 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2794 ibmvfc_handle_async(async, vhost);
2798 /* Pull all the valid messages off the CRQ */
2799 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2800 ibmvfc_handle_crq(crq, vhost);
2804 vio_enable_interrupts(vdev);
2805 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2806 vio_disable_interrupts(vdev);
2807 ibmvfc_handle_async(async, vhost);
2809 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2810 vio_disable_interrupts(vdev);
2811 ibmvfc_handle_crq(crq, vhost);
2817 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2821 * ibmvfc_init_tgt - Set the next init job step for the target
2822 * @tgt: ibmvfc target struct
2823 * @job_step: job step to perform
2826 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2827 void (*job_step) (struct ibmvfc_target *))
2829 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2830 tgt->job_step = job_step;
2831 wake_up(&tgt->vhost->work_wait_q);
2835 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2836 * @tgt: ibmvfc target struct
2837 * @job_step: initialization job step
2839 * Returns: 1 if step will be retried / 0 if not
2842 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
2843 void (*job_step) (struct ibmvfc_target *))
2845 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
2846 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2847 wake_up(&tgt->vhost->work_wait_q);
2850 ibmvfc_init_tgt(tgt, job_step);
2854 /* Defined in FC-LS */
2855 static const struct {
2872 * ibmvfc_get_prli_rsp - Find PRLI response index
2873 * @flags: PRLI response flags
2876 static int ibmvfc_get_prli_rsp(u16 flags)
2879 int code = (flags & 0x0f00) >> 8;
2881 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
2882 if (prli_rsp[i].code == code)
2889 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2890 * @evt: ibmvfc event struct
2893 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2895 struct ibmvfc_target *tgt = evt->tgt;
2896 struct ibmvfc_host *vhost = evt->vhost;
2897 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
2898 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
2899 u32 status = rsp->common.status;
2900 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
2902 vhost->discovery_threads--;
2903 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2905 case IBMVFC_MAD_SUCCESS:
2906 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
2907 parms->type, parms->flags, parms->service_parms);
2909 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
2910 index = ibmvfc_get_prli_rsp(parms->flags);
2911 if (prli_rsp[index].logged_in) {
2912 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
2913 tgt->need_login = 0;
2915 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
2916 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
2917 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
2918 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
2921 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2922 } else if (prli_rsp[index].retry)
2923 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2925 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2927 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2929 case IBMVFC_MAD_DRIVER_FAILED:
2931 case IBMVFC_MAD_CRQ_ERROR:
2932 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2934 case IBMVFC_MAD_FAILED:
2936 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED)
2937 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2938 else if (tgt->logo_rcvd)
2939 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2940 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2941 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2943 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2945 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2946 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2947 rsp->status, rsp->error, status);
2951 kref_put(&tgt->kref, ibmvfc_release_tgt);
2952 ibmvfc_free_event(evt);
2953 wake_up(&vhost->work_wait_q);
2957 * ibmvfc_tgt_send_prli - Send a process login
2958 * @tgt: ibmvfc target struct
2961 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2963 struct ibmvfc_process_login *prli;
2964 struct ibmvfc_host *vhost = tgt->vhost;
2965 struct ibmvfc_event *evt;
2967 if (vhost->discovery_threads >= disc_threads)
2970 kref_get(&tgt->kref);
2971 evt = ibmvfc_get_event(vhost);
2972 vhost->discovery_threads++;
2973 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2975 prli = &evt->iu.prli;
2976 memset(prli, 0, sizeof(*prli));
2977 prli->common.version = 1;
2978 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2979 prli->common.length = sizeof(*prli);
2980 prli->scsi_id = tgt->scsi_id;
2982 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2983 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2984 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2986 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2987 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2988 vhost->discovery_threads--;
2989 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2990 kref_put(&tgt->kref, ibmvfc_release_tgt);
2992 tgt_dbg(tgt, "Sent process login\n");
2996 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2997 * @evt: ibmvfc event struct
3000 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3002 struct ibmvfc_target *tgt = evt->tgt;
3003 struct ibmvfc_host *vhost = evt->vhost;
3004 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3005 u32 status = rsp->common.status;
3006 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3008 vhost->discovery_threads--;
3009 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3011 case IBMVFC_MAD_SUCCESS:
3012 tgt_dbg(tgt, "Port Login succeeded\n");
3013 if (tgt->ids.port_name &&
3014 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3016 tgt_dbg(tgt, "Port re-init required\n");
3019 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3020 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3021 tgt->ids.port_id = tgt->scsi_id;
3022 memcpy(&tgt->service_parms, &rsp->service_parms,
3023 sizeof(tgt->service_parms));
3024 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3025 sizeof(tgt->service_parms_change));
3026 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3028 case IBMVFC_MAD_DRIVER_FAILED:
3030 case IBMVFC_MAD_CRQ_ERROR:
3031 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3033 case IBMVFC_MAD_FAILED:
3035 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3036 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3038 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3040 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3041 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3042 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3043 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
3047 kref_put(&tgt->kref, ibmvfc_release_tgt);
3048 ibmvfc_free_event(evt);
3049 wake_up(&vhost->work_wait_q);
3053 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3054 * @tgt: ibmvfc target struct
3057 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3059 struct ibmvfc_port_login *plogi;
3060 struct ibmvfc_host *vhost = tgt->vhost;
3061 struct ibmvfc_event *evt;
3063 if (vhost->discovery_threads >= disc_threads)
3066 kref_get(&tgt->kref);
3068 evt = ibmvfc_get_event(vhost);
3069 vhost->discovery_threads++;
3070 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3071 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3073 plogi = &evt->iu.plogi;
3074 memset(plogi, 0, sizeof(*plogi));
3075 plogi->common.version = 1;
3076 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3077 plogi->common.length = sizeof(*plogi);
3078 plogi->scsi_id = tgt->scsi_id;
3080 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3081 vhost->discovery_threads--;
3082 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3083 kref_put(&tgt->kref, ibmvfc_release_tgt);
3085 tgt_dbg(tgt, "Sent port login\n");
3089 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3090 * @evt: ibmvfc event struct
3093 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3095 struct ibmvfc_target *tgt = evt->tgt;
3096 struct ibmvfc_host *vhost = evt->vhost;
3097 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3098 u32 status = rsp->common.status;
3100 vhost->discovery_threads--;
3101 ibmvfc_free_event(evt);
3102 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3105 case IBMVFC_MAD_SUCCESS:
3106 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3108 case IBMVFC_MAD_DRIVER_FAILED:
3109 kref_put(&tgt->kref, ibmvfc_release_tgt);
3110 wake_up(&vhost->work_wait_q);
3112 case IBMVFC_MAD_FAILED:
3114 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3118 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3119 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3120 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3121 tgt->scsi_id != tgt->new_scsi_id)
3122 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3123 kref_put(&tgt->kref, ibmvfc_release_tgt);
3124 wake_up(&vhost->work_wait_q);
3128 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3129 * @tgt: ibmvfc target struct
3132 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3134 struct ibmvfc_implicit_logout *mad;
3135 struct ibmvfc_host *vhost = tgt->vhost;
3136 struct ibmvfc_event *evt;
3138 if (vhost->discovery_threads >= disc_threads)
3141 kref_get(&tgt->kref);
3142 evt = ibmvfc_get_event(vhost);
3143 vhost->discovery_threads++;
3144 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3146 mad = &evt->iu.implicit_logout;
3147 memset(mad, 0, sizeof(*mad));
3148 mad->common.version = 1;
3149 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3150 mad->common.length = sizeof(*mad);
3151 mad->old_scsi_id = tgt->scsi_id;
3153 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3154 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3155 vhost->discovery_threads--;
3156 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3157 kref_put(&tgt->kref, ibmvfc_release_tgt);
3159 tgt_dbg(tgt, "Sent Implicit Logout\n");
3163 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3164 * @mad: ibmvfc passthru mad struct
3165 * @tgt: ibmvfc target struct
3168 * 1 if PLOGI needed / 0 if PLOGI not needed
3170 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3171 struct ibmvfc_target *tgt)
3173 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3174 sizeof(tgt->ids.port_name)))
3176 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3177 sizeof(tgt->ids.node_name)))
3179 if (mad->fc_iu.response[6] != tgt->scsi_id)
3185 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3186 * @evt: ibmvfc event struct
3189 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3191 struct ibmvfc_target *tgt = evt->tgt;
3192 struct ibmvfc_host *vhost = evt->vhost;
3193 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3194 u32 status = mad->common.status;
3195 u8 fc_reason, fc_explain;
3197 vhost->discovery_threads--;
3198 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3199 del_timer(&tgt->timer);
3202 case IBMVFC_MAD_SUCCESS:
3203 tgt_dbg(tgt, "ADISC succeeded\n");
3204 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3205 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3207 case IBMVFC_MAD_DRIVER_FAILED:
3209 case IBMVFC_MAD_FAILED:
3211 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3212 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3213 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3214 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3215 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3216 mad->iu.status, mad->iu.error,
3217 ibmvfc_get_fc_type(fc_reason), fc_reason,
3218 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3222 kref_put(&tgt->kref, ibmvfc_release_tgt);
3223 ibmvfc_free_event(evt);
3224 wake_up(&vhost->work_wait_q);
3228 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3229 * @evt: ibmvfc event struct
3232 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3234 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3236 memset(mad, 0, sizeof(*mad));
3237 mad->common.version = 1;
3238 mad->common.opcode = IBMVFC_PASSTHRU;
3239 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3240 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3241 offsetof(struct ibmvfc_passthru_mad, iu);
3242 mad->cmd_ioba.len = sizeof(mad->iu);
3243 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3244 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3245 mad->iu.cmd.va = (u64)evt->crq.ioba +
3246 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3247 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3248 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3249 mad->iu.rsp.va = (u64)evt->crq.ioba +
3250 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3251 offsetof(struct ibmvfc_passthru_fc_iu, response);
3252 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3256 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3257 * @evt: ibmvfc event struct
3259 * Just cleanup this event struct. Everything else is handled by
3260 * the ADISC completion handler. If the ADISC never actually comes
3261 * back, we still have the timer running on the ADISC event struct
3262 * which will fire and cause the CRQ to get reset.
3265 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3267 struct ibmvfc_host *vhost = evt->vhost;
3268 struct ibmvfc_target *tgt = evt->tgt;
3270 tgt_dbg(tgt, "ADISC cancel complete\n");
3271 vhost->abort_threads--;
3272 ibmvfc_free_event(evt);
3273 kref_put(&tgt->kref, ibmvfc_release_tgt);
3274 wake_up(&vhost->work_wait_q);
3278 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3279 * @tgt: ibmvfc target struct
3281 * If an ADISC times out, send a cancel. If the cancel times
3282 * out, reset the CRQ. When the ADISC comes back as cancelled,
3283 * log back into the target.
3285 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3287 struct ibmvfc_host *vhost = tgt->vhost;
3288 struct ibmvfc_event *evt;
3289 struct ibmvfc_tmf *tmf;
3290 unsigned long flags;
3293 tgt_dbg(tgt, "ADISC timeout\n");
3294 spin_lock_irqsave(vhost->host->host_lock, flags);
3295 if (vhost->abort_threads >= disc_threads ||
3296 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3297 vhost->state != IBMVFC_INITIALIZING ||
3298 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3299 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3303 vhost->abort_threads++;
3304 kref_get(&tgt->kref);
3305 evt = ibmvfc_get_event(vhost);
3306 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3310 memset(tmf, 0, sizeof(*tmf));
3311 tmf->common.version = 1;
3312 tmf->common.opcode = IBMVFC_TMF_MAD;
3313 tmf->common.length = sizeof(*tmf);
3314 tmf->scsi_id = tgt->scsi_id;
3315 tmf->cancel_key = tgt->cancel_key;
3317 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3320 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3321 vhost->abort_threads--;
3322 kref_put(&tgt->kref, ibmvfc_release_tgt);
3323 __ibmvfc_reset_host(vhost);
3325 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3326 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3330 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3331 * @tgt: ibmvfc target struct
3333 * When sending an ADISC we end up with two timers running. The
3334 * first timer is the timer in the ibmvfc target struct. If this
3335 * fires, we send a cancel to the target. The second timer is the
3336 * timer on the ibmvfc event for the ADISC, which is longer. If that
3337 * fires, it means the ADISC timed out and our attempt to cancel it
3338 * also failed, so we need to reset the CRQ.
3340 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3342 struct ibmvfc_passthru_mad *mad;
3343 struct ibmvfc_host *vhost = tgt->vhost;
3344 struct ibmvfc_event *evt;
3346 if (vhost->discovery_threads >= disc_threads)
3349 kref_get(&tgt->kref);
3350 evt = ibmvfc_get_event(vhost);
3351 vhost->discovery_threads++;
3352 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3355 ibmvfc_init_passthru(evt);
3356 mad = &evt->iu.passthru;
3357 mad->iu.flags = IBMVFC_FC_ELS;
3358 mad->iu.scsi_id = tgt->scsi_id;
3359 mad->iu.cancel_key = tgt->cancel_key;
3361 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3362 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3363 sizeof(vhost->login_buf->resp.port_name));
3364 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3365 sizeof(vhost->login_buf->resp.node_name));
3366 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3368 if (timer_pending(&tgt->timer))
3369 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3371 tgt->timer.data = (unsigned long) tgt;
3372 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3373 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3374 add_timer(&tgt->timer);
3377 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3378 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3379 vhost->discovery_threads--;
3380 del_timer(&tgt->timer);
3381 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3382 kref_put(&tgt->kref, ibmvfc_release_tgt);
3384 tgt_dbg(tgt, "Sent ADISC\n");
3388 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3389 * @evt: ibmvfc event struct
3392 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3394 struct ibmvfc_target *tgt = evt->tgt;
3395 struct ibmvfc_host *vhost = evt->vhost;
3396 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3397 u32 status = rsp->common.status;
3398 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3400 vhost->discovery_threads--;
3401 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3403 case IBMVFC_MAD_SUCCESS:
3404 tgt_dbg(tgt, "Query Target succeeded\n");
3405 tgt->new_scsi_id = rsp->scsi_id;
3406 if (rsp->scsi_id != tgt->scsi_id)
3407 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3409 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3411 case IBMVFC_MAD_DRIVER_FAILED:
3413 case IBMVFC_MAD_CRQ_ERROR:
3414 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3416 case IBMVFC_MAD_FAILED:
3418 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3419 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3420 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3421 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3422 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3423 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3425 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3427 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3428 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3429 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3430 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3434 kref_put(&tgt->kref, ibmvfc_release_tgt);
3435 ibmvfc_free_event(evt);
3436 wake_up(&vhost->work_wait_q);
3440 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3441 * @tgt: ibmvfc target struct
3444 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3446 struct ibmvfc_query_tgt *query_tgt;
3447 struct ibmvfc_host *vhost = tgt->vhost;
3448 struct ibmvfc_event *evt;
3450 if (vhost->discovery_threads >= disc_threads)
3453 kref_get(&tgt->kref);
3454 evt = ibmvfc_get_event(vhost);
3455 vhost->discovery_threads++;
3457 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3458 query_tgt = &evt->iu.query_tgt;
3459 memset(query_tgt, 0, sizeof(*query_tgt));
3460 query_tgt->common.version = 1;
3461 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3462 query_tgt->common.length = sizeof(*query_tgt);
3463 query_tgt->wwpn = tgt->ids.port_name;
3465 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3466 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3467 vhost->discovery_threads--;
3468 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3469 kref_put(&tgt->kref, ibmvfc_release_tgt);
3471 tgt_dbg(tgt, "Sent Query Target\n");
3475 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3476 * @vhost: ibmvfc host struct
3477 * @scsi_id: SCSI ID to allocate target for
3480 * 0 on success / other on failure
3482 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3484 struct ibmvfc_target *tgt;
3485 unsigned long flags;
3487 spin_lock_irqsave(vhost->host->host_lock, flags);
3488 list_for_each_entry(tgt, &vhost->targets, queue) {
3489 if (tgt->scsi_id == scsi_id) {
3490 if (tgt->need_login)
3491 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3495 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3497 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3499 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
3504 memset(tgt, 0, sizeof(*tgt));
3505 tgt->scsi_id = scsi_id;
3506 tgt->new_scsi_id = scsi_id;
3508 tgt->need_login = 1;
3509 tgt->cancel_key = vhost->task_set++;
3510 init_timer(&tgt->timer);
3511 kref_init(&tgt->kref);
3512 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3513 spin_lock_irqsave(vhost->host->host_lock, flags);
3514 list_add_tail(&tgt->queue, &vhost->targets);
3517 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3522 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3523 * @vhost: ibmvfc host struct
3526 * 0 on success / other on failure
3528 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3532 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3533 rc = ibmvfc_alloc_target(vhost,
3534 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3540 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3541 * @evt: ibmvfc event struct
3544 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3546 struct ibmvfc_host *vhost = evt->vhost;
3547 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3548 u32 mad_status = rsp->common.status;
3549 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3551 switch (mad_status) {
3552 case IBMVFC_MAD_SUCCESS:
3553 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3554 vhost->num_targets = rsp->num_written;
3555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3557 case IBMVFC_MAD_FAILED:
3558 level += ibmvfc_retry_host_init(vhost);
3559 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3560 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3562 case IBMVFC_MAD_DRIVER_FAILED:
3565 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3566 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3570 ibmvfc_free_event(evt);
3571 wake_up(&vhost->work_wait_q);
3575 * ibmvfc_discover_targets - Send Discover Targets MAD
3576 * @vhost: ibmvfc host struct
3579 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3581 struct ibmvfc_discover_targets *mad;
3582 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3584 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3585 mad = &evt->iu.discover_targets;
3586 memset(mad, 0, sizeof(*mad));
3587 mad->common.version = 1;
3588 mad->common.opcode = IBMVFC_DISC_TARGETS;
3589 mad->common.length = sizeof(*mad);
3590 mad->bufflen = vhost->disc_buf_sz;
3591 mad->buffer.va = vhost->disc_buf_dma;
3592 mad->buffer.len = vhost->disc_buf_sz;
3593 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3595 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3596 ibmvfc_dbg(vhost, "Sent discover targets\n");
3598 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3602 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3603 * @evt: ibmvfc event struct
3606 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3608 struct ibmvfc_host *vhost = evt->vhost;
3609 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3610 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3611 unsigned int npiv_max_sectors;
3612 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3614 switch (mad_status) {
3615 case IBMVFC_MAD_SUCCESS:
3616 ibmvfc_free_event(evt);
3618 case IBMVFC_MAD_FAILED:
3619 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3620 level += ibmvfc_retry_host_init(vhost);
3622 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3623 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
3624 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3625 ibmvfc_free_event(evt);
3627 case IBMVFC_MAD_CRQ_ERROR:
3628 ibmvfc_retry_host_init(vhost);
3629 case IBMVFC_MAD_DRIVER_FAILED:
3630 ibmvfc_free_event(evt);
3633 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3634 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3635 ibmvfc_free_event(evt);
3639 vhost->client_migrated = 0;
3641 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3642 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3644 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3645 wake_up(&vhost->work_wait_q);
3649 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3650 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3652 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3653 wake_up(&vhost->work_wait_q);
3657 vhost->logged_in = 1;
3658 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3659 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3660 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3661 rsp->drc_name, npiv_max_sectors);
3663 fc_host_fabric_name(vhost->host) = rsp->node_name;
3664 fc_host_node_name(vhost->host) = rsp->node_name;
3665 fc_host_port_name(vhost->host) = rsp->port_name;
3666 fc_host_port_id(vhost->host) = rsp->scsi_id;
3667 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3668 fc_host_supported_classes(vhost->host) = 0;
3669 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3670 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3671 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3672 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3673 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3674 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3675 fc_host_maxframe_size(vhost->host) =
3676 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3678 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3679 vhost->host->max_sectors = npiv_max_sectors;
3680 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3681 wake_up(&vhost->work_wait_q);
3685 * ibmvfc_npiv_login - Sends NPIV login
3686 * @vhost: ibmvfc host struct
3689 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3691 struct ibmvfc_npiv_login_mad *mad;
3692 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3694 ibmvfc_gather_partition_info(vhost);
3695 ibmvfc_set_login_info(vhost);
3696 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3698 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3699 mad = &evt->iu.npiv_login;
3700 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3701 mad->common.version = 1;
3702 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3703 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3704 mad->buffer.va = vhost->login_buf_dma;
3705 mad->buffer.len = sizeof(*vhost->login_buf);
3707 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3709 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3710 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3712 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3716 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
3717 * @vhost: ibmvfc host struct
3720 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
3722 struct ibmvfc_host *vhost = evt->vhost;
3723 u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
3725 ibmvfc_free_event(evt);
3727 switch (mad_status) {
3728 case IBMVFC_MAD_SUCCESS:
3729 if (list_empty(&vhost->sent) &&
3730 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
3731 ibmvfc_init_host(vhost);
3735 case IBMVFC_MAD_FAILED:
3736 case IBMVFC_MAD_NOT_SUPPORTED:
3737 case IBMVFC_MAD_CRQ_ERROR:
3738 case IBMVFC_MAD_DRIVER_FAILED:
3740 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
3744 ibmvfc_hard_reset_host(vhost);
3748 * ibmvfc_npiv_logout - Issue an NPIV Logout
3749 * @vhost: ibmvfc host struct
3752 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
3754 struct ibmvfc_npiv_logout_mad *mad;
3755 struct ibmvfc_event *evt;
3757 evt = ibmvfc_get_event(vhost);
3758 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
3760 mad = &evt->iu.npiv_logout;
3761 memset(mad, 0, sizeof(*mad));
3762 mad->common.version = 1;
3763 mad->common.opcode = IBMVFC_NPIV_LOGOUT;
3764 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
3766 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
3768 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3769 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
3771 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3775 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3776 * @vhost: ibmvfc host struct
3779 * 1 if work to do / 0 if not
3781 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3783 struct ibmvfc_target *tgt;
3785 list_for_each_entry(tgt, &vhost->targets, queue) {
3786 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3787 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3795 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3796 * @vhost: ibmvfc host struct
3799 * 1 if work to do / 0 if not
3801 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3803 struct ibmvfc_target *tgt;
3805 if (kthread_should_stop())
3807 switch (vhost->action) {
3808 case IBMVFC_HOST_ACTION_NONE:
3809 case IBMVFC_HOST_ACTION_INIT_WAIT:
3810 case IBMVFC_HOST_ACTION_LOGO_WAIT:
3812 case IBMVFC_HOST_ACTION_TGT_INIT:
3813 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3814 if (vhost->discovery_threads == disc_threads)
3816 list_for_each_entry(tgt, &vhost->targets, queue)
3817 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3819 list_for_each_entry(tgt, &vhost->targets, queue)
3820 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3823 case IBMVFC_HOST_ACTION_LOGO:
3824 case IBMVFC_HOST_ACTION_INIT:
3825 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3826 case IBMVFC_HOST_ACTION_TGT_DEL:
3827 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
3828 case IBMVFC_HOST_ACTION_QUERY:
3837 * ibmvfc_work_to_do - Is there task level work to do?
3838 * @vhost: ibmvfc host struct
3841 * 1 if work to do / 0 if not
3843 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3845 unsigned long flags;
3848 spin_lock_irqsave(vhost->host->host_lock, flags);
3849 rc = __ibmvfc_work_to_do(vhost);
3850 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3855 * ibmvfc_log_ae - Log async events if necessary
3856 * @vhost: ibmvfc host struct
3857 * @events: events to log
3860 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3862 if (events & IBMVFC_AE_RSCN)
3863 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3864 if ((events & IBMVFC_AE_LINKDOWN) &&
3865 vhost->state >= IBMVFC_HALTED)
3866 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3867 if ((events & IBMVFC_AE_LINKUP) &&
3868 vhost->state == IBMVFC_INITIALIZING)
3869 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3873 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3874 * @tgt: ibmvfc target struct
3877 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3879 struct ibmvfc_host *vhost = tgt->vhost;
3880 struct fc_rport *rport;
3881 unsigned long flags;
3883 tgt_dbg(tgt, "Adding rport\n");
3884 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3885 spin_lock_irqsave(vhost->host->host_lock, flags);
3887 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3888 tgt_dbg(tgt, "Deleting rport\n");
3889 list_del(&tgt->queue);
3890 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3891 fc_remote_port_delete(rport);
3892 del_timer_sync(&tgt->timer);
3893 kref_put(&tgt->kref, ibmvfc_release_tgt);
3898 tgt_dbg(tgt, "rport add succeeded\n");
3900 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3901 rport->supported_classes = 0;
3902 tgt->target_id = rport->scsi_target_id;
3903 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3904 rport->supported_classes |= FC_COS_CLASS1;
3905 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3906 rport->supported_classes |= FC_COS_CLASS2;
3907 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3908 rport->supported_classes |= FC_COS_CLASS3;
3910 tgt_dbg(tgt, "rport add failed\n");
3911 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3915 * ibmvfc_do_work - Do task level work
3916 * @vhost: ibmvfc host struct
3919 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3921 struct ibmvfc_target *tgt;
3922 unsigned long flags;
3923 struct fc_rport *rport;
3925 ibmvfc_log_ae(vhost, vhost->events_to_log);
3926 spin_lock_irqsave(vhost->host->host_lock, flags);
3927 vhost->events_to_log = 0;
3928 switch (vhost->action) {
3929 case IBMVFC_HOST_ACTION_NONE:
3930 case IBMVFC_HOST_ACTION_LOGO_WAIT:
3931 case IBMVFC_HOST_ACTION_INIT_WAIT:
3933 case IBMVFC_HOST_ACTION_LOGO:
3934 vhost->job_step(vhost);
3936 case IBMVFC_HOST_ACTION_INIT:
3937 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
3938 if (vhost->delay_init) {
3939 vhost->delay_init = 0;
3940 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3944 vhost->job_step(vhost);
3946 case IBMVFC_HOST_ACTION_QUERY:
3947 list_for_each_entry(tgt, &vhost->targets, queue)
3948 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3949 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3951 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3952 list_for_each_entry(tgt, &vhost->targets, queue) {
3953 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3959 if (!ibmvfc_dev_init_to_do(vhost))
3960 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3962 case IBMVFC_HOST_ACTION_TGT_DEL:
3963 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
3964 list_for_each_entry(tgt, &vhost->targets, queue) {
3965 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3966 tgt_dbg(tgt, "Deleting rport\n");
3969 list_del(&tgt->queue);
3970 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3972 fc_remote_port_delete(rport);
3973 del_timer_sync(&tgt->timer);
3974 kref_put(&tgt->kref, ibmvfc_release_tgt);
3979 if (vhost->state == IBMVFC_INITIALIZING) {
3980 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
3981 if (vhost->reinit) {
3983 scsi_block_requests(vhost->host);
3984 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3985 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3987 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3988 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3989 wake_up(&vhost->init_wait_q);
3990 schedule_work(&vhost->rport_add_work_q);
3991 vhost->init_retries = 0;
3992 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3993 scsi_unblock_requests(vhost->host);
3998 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3999 vhost->job_step = ibmvfc_discover_targets;
4002 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4003 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4004 scsi_unblock_requests(vhost->host);
4005 wake_up(&vhost->init_wait_q);
4009 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4010 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4011 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4012 ibmvfc_alloc_targets(vhost);
4013 spin_lock_irqsave(vhost->host->host_lock, flags);
4015 case IBMVFC_HOST_ACTION_TGT_INIT:
4016 list_for_each_entry(tgt, &vhost->targets, queue) {
4017 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4023 if (!ibmvfc_dev_init_to_do(vhost))
4024 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4030 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4034 * ibmvfc_work - Do task level work
4035 * @data: ibmvfc host struct
4040 static int ibmvfc_work(void *data)
4042 struct ibmvfc_host *vhost = data;
4045 set_user_nice(current, -20);
4048 rc = wait_event_interruptible(vhost->work_wait_q,
4049 ibmvfc_work_to_do(vhost));
4053 if (kthread_should_stop())
4056 ibmvfc_do_work(vhost);
4059 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4064 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4065 * @vhost: ibmvfc host struct
4067 * Allocates a page for messages, maps it for dma, and registers
4068 * the crq with the hypervisor.
4071 * zero on success / other on failure
4073 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4075 int rc, retrc = -ENOMEM;
4076 struct device *dev = vhost->dev;
4077 struct vio_dev *vdev = to_vio_dev(dev);
4078 struct ibmvfc_crq_queue *crq = &vhost->crq;
4081 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4086 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4087 crq->msg_token = dma_map_single(dev, crq->msgs,
4088 PAGE_SIZE, DMA_BIDIRECTIONAL);
4090 if (dma_mapping_error(dev, crq->msg_token))
4093 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4094 crq->msg_token, PAGE_SIZE);
4096 if (rc == H_RESOURCE)
4097 /* maybe kexecing and resource is busy. try a reset */
4098 retrc = rc = ibmvfc_reset_crq(vhost);
4101 dev_warn(dev, "Partner adapter not ready\n");
4103 dev_warn(dev, "Error %d opening adapter\n", rc);
4104 goto reg_crq_failed;
4109 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4111 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4112 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4113 goto req_irq_failed;
4116 if ((rc = vio_enable_interrupts(vdev))) {
4117 dev_err(dev, "Error %d enabling interrupts\n", rc);
4118 goto req_irq_failed;
4126 tasklet_kill(&vhost->tasklet);
4128 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4129 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4131 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4133 free_page((unsigned long)crq->msgs);
4138 * ibmvfc_free_mem - Free memory for vhost
4139 * @vhost: ibmvfc host struct
4144 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4146 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4149 mempool_destroy(vhost->tgt_pool);
4150 kfree(vhost->trace);
4151 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4152 vhost->disc_buf_dma);
4153 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4154 vhost->login_buf, vhost->login_buf_dma);
4155 dma_pool_destroy(vhost->sg_pool);
4156 dma_unmap_single(vhost->dev, async_q->msg_token,
4157 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4158 free_page((unsigned long)async_q->msgs);
4163 * ibmvfc_alloc_mem - Allocate memory for vhost
4164 * @vhost: ibmvfc host struct
4167 * 0 on success / non-zero on failure
4169 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4171 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4172 struct device *dev = vhost->dev;
4175 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4176 if (!async_q->msgs) {
4177 dev_err(dev, "Couldn't allocate async queue.\n");
4181 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4182 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4183 async_q->size * sizeof(*async_q->msgs),
4186 if (dma_mapping_error(dev, async_q->msg_token)) {
4187 dev_err(dev, "Failed to map async queue\n");
4188 goto free_async_crq;
4191 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4192 SG_ALL * sizeof(struct srp_direct_buf),
4193 sizeof(struct srp_direct_buf), 0);
4195 if (!vhost->sg_pool) {
4196 dev_err(dev, "Failed to allocate sg pool\n");
4197 goto unmap_async_crq;
4200 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4201 &vhost->login_buf_dma, GFP_KERNEL);
4203 if (!vhost->login_buf) {
4204 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4208 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4209 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4210 &vhost->disc_buf_dma, GFP_KERNEL);
4212 if (!vhost->disc_buf) {
4213 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4214 goto free_login_buffer;
4217 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4218 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4221 goto free_disc_buffer;
4223 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4224 sizeof(struct ibmvfc_target));
4226 if (!vhost->tgt_pool) {
4227 dev_err(dev, "Couldn't allocate target memory pool\n");
4235 kfree(vhost->trace);
4237 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4238 vhost->disc_buf_dma);
4240 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4241 vhost->login_buf, vhost->login_buf_dma);
4243 dma_pool_destroy(vhost->sg_pool);
4245 dma_unmap_single(dev, async_q->msg_token,
4246 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4248 free_page((unsigned long)async_q->msgs);
4255 * ibmvfc_rport_add_thread - Worker thread for rport adds
4256 * @work: work struct
4259 static void ibmvfc_rport_add_thread(struct work_struct *work)
4261 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4263 struct ibmvfc_target *tgt;
4264 struct fc_rport *rport;
4265 unsigned long flags;
4269 spin_lock_irqsave(vhost->host->host_lock, flags);
4272 if (vhost->state != IBMVFC_ACTIVE)
4275 list_for_each_entry(tgt, &vhost->targets, queue) {
4276 if (tgt->add_rport) {
4279 kref_get(&tgt->kref);
4282 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4283 ibmvfc_tgt_add_rport(tgt);
4284 } else if (get_device(&rport->dev)) {
4285 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4286 tgt_dbg(tgt, "Setting rport roles\n");
4287 fc_remote_port_rolechg(rport, tgt->ids.roles);
4288 put_device(&rport->dev);
4291 kref_put(&tgt->kref, ibmvfc_release_tgt);
4292 spin_lock_irqsave(vhost->host->host_lock, flags);
4298 if (vhost->state == IBMVFC_ACTIVE)
4299 vhost->scan_complete = 1;
4300 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4305 * ibmvfc_probe - Adapter hot plug add entry point
4306 * @vdev: vio device struct
4307 * @id: vio device id struct
4310 * 0 on success / non-zero on failure
4312 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4314 struct ibmvfc_host *vhost;
4315 struct Scsi_Host *shost;
4316 struct device *dev = &vdev->dev;
4320 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4322 dev_err(dev, "Couldn't allocate host data\n");
4326 shost->transportt = ibmvfc_transport_template;
4327 shost->can_queue = max_requests;
4328 shost->max_lun = max_lun;
4329 shost->max_id = max_targets;
4330 shost->max_sectors = IBMVFC_MAX_SECTORS;
4331 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4332 shost->unique_id = shost->host_no;
4334 vhost = shost_priv(shost);
4335 INIT_LIST_HEAD(&vhost->sent);
4336 INIT_LIST_HEAD(&vhost->free);
4337 INIT_LIST_HEAD(&vhost->targets);
4338 sprintf(vhost->name, IBMVFC_NAME);
4339 vhost->host = shost;
4341 vhost->partition_number = -1;
4342 vhost->log_level = log_level;
4343 vhost->task_set = 1;
4344 strcpy(vhost->partition_name, "UNKNOWN");
4345 init_waitqueue_head(&vhost->work_wait_q);
4346 init_waitqueue_head(&vhost->init_wait_q);
4347 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4349 if ((rc = ibmvfc_alloc_mem(vhost)))
4350 goto free_scsi_host;
4352 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4355 if (IS_ERR(vhost->work_thread)) {
4356 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4357 PTR_ERR(vhost->work_thread));
4361 if ((rc = ibmvfc_init_crq(vhost))) {
4362 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4366 if ((rc = ibmvfc_init_event_pool(vhost))) {
4367 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4371 if ((rc = scsi_add_host(shost, dev)))
4372 goto release_event_pool;
4374 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4375 &ibmvfc_trace_attr))) {
4376 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4380 dev_set_drvdata(dev, vhost);
4381 spin_lock(&ibmvfc_driver_lock);
4382 list_add_tail(&vhost->queue, &ibmvfc_head);
4383 spin_unlock(&ibmvfc_driver_lock);
4385 ibmvfc_send_crq_init(vhost);
4386 scsi_scan_host(shost);
4390 scsi_remove_host(shost);
4392 ibmvfc_free_event_pool(vhost);
4394 ibmvfc_release_crq_queue(vhost);
4396 kthread_stop(vhost->work_thread);
4398 ibmvfc_free_mem(vhost);
4400 scsi_host_put(shost);
4407 * ibmvfc_remove - Adapter hot plug remove entry point
4408 * @vdev: vio device struct
4413 static int ibmvfc_remove(struct vio_dev *vdev)
4415 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4416 unsigned long flags;
4419 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4421 spin_lock_irqsave(vhost->host->host_lock, flags);
4422 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4423 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4425 ibmvfc_wait_while_resetting(vhost);
4426 ibmvfc_release_crq_queue(vhost);
4427 kthread_stop(vhost->work_thread);
4428 fc_remove_host(vhost->host);
4429 scsi_remove_host(vhost->host);
4431 spin_lock_irqsave(vhost->host->host_lock, flags);
4432 ibmvfc_purge_requests(vhost, DID_ERROR);
4433 ibmvfc_free_event_pool(vhost);
4434 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4436 ibmvfc_free_mem(vhost);
4437 spin_lock(&ibmvfc_driver_lock);
4438 list_del(&vhost->queue);
4439 spin_unlock(&ibmvfc_driver_lock);
4440 scsi_host_put(vhost->host);
4446 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4447 * @vdev: vio device struct
4450 * Number of bytes the driver will need to DMA map at the same time in
4451 * order to perform well.
4453 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4455 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4456 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4459 static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4460 {"fcp", "IBM,vfc-client"},
4463 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4465 static struct vio_driver ibmvfc_driver = {
4466 .id_table = ibmvfc_device_table,
4467 .probe = ibmvfc_probe,
4468 .remove = ibmvfc_remove,
4469 .get_desired_dma = ibmvfc_get_desired_dma,
4471 .name = IBMVFC_NAME,
4472 .owner = THIS_MODULE,
4476 static struct fc_function_template ibmvfc_transport_functions = {
4477 .show_host_fabric_name = 1,
4478 .show_host_node_name = 1,
4479 .show_host_port_name = 1,
4480 .show_host_supported_classes = 1,
4481 .show_host_port_type = 1,
4482 .show_host_port_id = 1,
4483 .show_host_maxframe_size = 1,
4485 .get_host_port_state = ibmvfc_get_host_port_state,
4486 .show_host_port_state = 1,
4488 .get_host_speed = ibmvfc_get_host_speed,
4489 .show_host_speed = 1,
4491 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4492 .terminate_rport_io = ibmvfc_terminate_rport_io,
4494 .show_rport_maxframe_size = 1,
4495 .show_rport_supported_classes = 1,
4497 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4498 .show_rport_dev_loss_tmo = 1,
4500 .get_starget_node_name = ibmvfc_get_starget_node_name,
4501 .show_starget_node_name = 1,
4503 .get_starget_port_name = ibmvfc_get_starget_port_name,
4504 .show_starget_port_name = 1,
4506 .get_starget_port_id = ibmvfc_get_starget_port_id,
4507 .show_starget_port_id = 1,
4511 * ibmvfc_module_init - Initialize the ibmvfc module
4514 * 0 on success / other on failure
4516 static int __init ibmvfc_module_init(void)
4520 if (!firmware_has_feature(FW_FEATURE_VIO))
4523 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4524 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4526 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4527 if (!ibmvfc_transport_template)
4530 rc = vio_register_driver(&ibmvfc_driver);
4532 fc_release_transport(ibmvfc_transport_template);
4537 * ibmvfc_module_exit - Teardown the ibmvfc module
4542 static void __exit ibmvfc_module_exit(void)
4544 vio_unregister_driver(&ibmvfc_driver);
4545 fc_release_transport(ibmvfc_transport_template);
4548 module_init(ibmvfc_module_init);
4549 module_exit(ibmvfc_module_exit);