1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
7 * Copyright (C) IBM Corporation, 2008
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/dmapool.h>
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/kthread.h>
17 #include <linux/slab.h>
20 #include <linux/stringify.h>
21 #include <linux/bsg-lib.h>
22 #include <asm/firmware.h>
25 #include <scsi/scsi.h>
26 #include <scsi/scsi_cmnd.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/scsi_tcq.h>
30 #include <scsi/scsi_transport_fc.h>
31 #include <scsi/scsi_bsg_fc.h>
34 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
35 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
36 static u64 max_lun = IBMVFC_MAX_LUN;
37 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
38 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
39 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
40 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
41 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
42 static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
43 static LIST_HEAD(ibmvfc_head);
44 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
45 static struct scsi_transport_template *ibmvfc_transport_template;
47 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
48 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
49 MODULE_LICENSE("GPL");
50 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
52 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
53 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
54 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
55 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
56 MODULE_PARM_DESC(default_timeout,
57 "Default timeout in seconds for initialization and EH commands. "
58 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
59 module_param_named(max_requests, max_requests, uint, S_IRUGO);
60 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
61 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
62 module_param_named(max_lun, max_lun, ullong, S_IRUGO);
63 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
64 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
65 module_param_named(max_targets, max_targets, uint, S_IRUGO);
66 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
67 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
68 module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
69 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
70 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
71 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
72 MODULE_PARM_DESC(debug, "Enable driver debug information. "
73 "[Default=" __stringify(IBMVFC_DEBUG) "]");
74 module_param_named(log_level, log_level, uint, 0);
75 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
76 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
77 module_param_named(cls3_error, cls3_error, uint, 0);
78 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
79 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
89 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
90 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
91 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
92 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
93 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
94 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
95 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
96 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
97 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
98 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
99 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
100 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
104 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
105 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
106 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
107 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
108 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
109 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
110 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
111 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
112 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
113 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
115 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
116 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
117 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
118 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
119 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
120 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
121 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
122 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
123 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
124 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
125 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
127 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
128 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." },
131 static void ibmvfc_npiv_login(struct ibmvfc_host *);
132 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
133 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
134 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
135 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
137 static const char *unknown_error = "unknown error";
139 #ifdef CONFIG_SCSI_IBMVFC_TRACE
141 * ibmvfc_trc_start - Log a start trace entry
142 * @evt: ibmvfc event struct
145 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
147 struct ibmvfc_host *vhost = evt->vhost;
148 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
149 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
150 struct ibmvfc_trace_entry *entry;
152 entry = &vhost->trace[vhost->trace_index++];
154 entry->time = jiffies;
155 entry->fmt = evt->crq.format;
156 entry->type = IBMVFC_TRC_START;
158 switch (entry->fmt) {
159 case IBMVFC_CMD_FORMAT:
160 entry->op_code = vfc_cmd->iu.cdb[0];
161 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
162 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
163 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
164 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
166 case IBMVFC_MAD_FORMAT:
167 entry->op_code = be32_to_cpu(mad->opcode);
175 * ibmvfc_trc_end - Log an end trace entry
176 * @evt: ibmvfc event struct
179 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
181 struct ibmvfc_host *vhost = evt->vhost;
182 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
183 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
184 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
187 entry->time = jiffies;
188 entry->fmt = evt->crq.format;
189 entry->type = IBMVFC_TRC_END;
191 switch (entry->fmt) {
192 case IBMVFC_CMD_FORMAT:
193 entry->op_code = vfc_cmd->iu.cdb[0];
194 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
195 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
196 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
197 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
198 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
199 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
200 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
201 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
203 case IBMVFC_MAD_FORMAT:
204 entry->op_code = be32_to_cpu(mad->opcode);
205 entry->u.end.status = be16_to_cpu(mad->status);
214 #define ibmvfc_trc_start(evt) do { } while (0)
215 #define ibmvfc_trc_end(evt) do { } while (0)
219 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
220 * @status: status / error class
224 * index into cmd_status / -EINVAL on failure
226 static int ibmvfc_get_err_index(u16 status, u16 error)
230 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
231 if ((cmd_status[i].status & status) == cmd_status[i].status &&
232 cmd_status[i].error == error)
239 * ibmvfc_get_cmd_error - Find the error description for the fcp response
240 * @status: status / error class
244 * error description string
246 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
248 int rc = ibmvfc_get_err_index(status, error);
250 return cmd_status[rc].name;
251 return unknown_error;
255 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
256 * @vfc_cmd: ibmvfc command struct
259 * SCSI result value to return for completed command
261 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
264 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
265 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
267 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
268 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
269 rsp->data.info.rsp_code))
270 return DID_ERROR << 16;
272 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
274 return rsp->scsi_status | (cmd_status[err].result << 16);
275 return rsp->scsi_status | (DID_ERROR << 16);
279 * ibmvfc_retry_cmd - Determine if error status is retryable
280 * @status: status / error class
284 * 1 if error should be retried / 0 if it should not
286 static int ibmvfc_retry_cmd(u16 status, u16 error)
288 int rc = ibmvfc_get_err_index(status, error);
291 return cmd_status[rc].retry;
295 static const char *unknown_fc_explain = "unknown fc explain";
297 static const struct {
301 { 0x00, "no additional explanation" },
302 { 0x01, "service parameter error - options" },
303 { 0x03, "service parameter error - initiator control" },
304 { 0x05, "service parameter error - recipient control" },
305 { 0x07, "service parameter error - received data field size" },
306 { 0x09, "service parameter error - concurrent seq" },
307 { 0x0B, "service parameter error - credit" },
308 { 0x0D, "invalid N_Port/F_Port_Name" },
309 { 0x0E, "invalid node/Fabric Name" },
310 { 0x0F, "invalid common service parameters" },
311 { 0x11, "invalid association header" },
312 { 0x13, "association header required" },
313 { 0x15, "invalid originator S_ID" },
314 { 0x17, "invalid OX_ID-RX-ID combination" },
315 { 0x19, "command (request) already in progress" },
316 { 0x1E, "N_Port Login requested" },
317 { 0x1F, "Invalid N_Port_ID" },
320 static const struct {
324 { 0x00, "no additional explanation" },
325 { 0x01, "port identifier not registered" },
326 { 0x02, "port name not registered" },
327 { 0x03, "node name not registered" },
328 { 0x04, "class of service not registered" },
329 { 0x06, "initial process associator not registered" },
330 { 0x07, "FC-4 TYPEs not registered" },
331 { 0x08, "symbolic port name not registered" },
332 { 0x09, "symbolic node name not registered" },
333 { 0x0A, "port type not registered" },
334 { 0xF0, "authorization exception" },
335 { 0xF1, "authentication exception" },
336 { 0xF2, "data base full" },
337 { 0xF3, "data base empty" },
338 { 0xF4, "processing request" },
339 { 0xF5, "unable to verify connection" },
340 { 0xF6, "devices not in a common zone" },
344 * ibmvfc_get_ls_explain - Return the FC Explain description text
345 * @status: FC Explain status
350 static const char *ibmvfc_get_ls_explain(u16 status)
354 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
355 if (ls_explain[i].fc_explain == status)
356 return ls_explain[i].name;
358 return unknown_fc_explain;
362 * ibmvfc_get_gs_explain - Return the FC Explain description text
363 * @status: FC Explain status
368 static const char *ibmvfc_get_gs_explain(u16 status)
372 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
373 if (gs_explain[i].fc_explain == status)
374 return gs_explain[i].name;
376 return unknown_fc_explain;
379 static const struct {
380 enum ibmvfc_fc_type fc_type;
383 { IBMVFC_FABRIC_REJECT, "fabric reject" },
384 { IBMVFC_PORT_REJECT, "port reject" },
385 { IBMVFC_LS_REJECT, "ELS reject" },
386 { IBMVFC_FABRIC_BUSY, "fabric busy" },
387 { IBMVFC_PORT_BUSY, "port busy" },
388 { IBMVFC_BASIC_REJECT, "basic reject" },
391 static const char *unknown_fc_type = "unknown fc type";
394 * ibmvfc_get_fc_type - Return the FC Type description text
395 * @status: FC Type error status
400 static const char *ibmvfc_get_fc_type(u16 status)
404 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
405 if (fc_type[i].fc_type == status)
406 return fc_type[i].name;
408 return unknown_fc_type;
412 * ibmvfc_set_tgt_action - Set the next init action for the target
413 * @tgt: ibmvfc target struct
414 * @action: action to perform
417 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
418 enum ibmvfc_target_action action)
420 switch (tgt->action) {
421 case IBMVFC_TGT_ACTION_DEL_RPORT:
422 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
423 tgt->action = action;
424 case IBMVFC_TGT_ACTION_DELETED_RPORT:
427 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
429 tgt->action = action;
435 * ibmvfc_set_host_state - Set the state for the host
436 * @vhost: ibmvfc host struct
437 * @state: state to set host to
440 * 0 if state changed / non-zero if not changed
442 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
443 enum ibmvfc_host_state state)
447 switch (vhost->state) {
448 case IBMVFC_HOST_OFFLINE:
452 vhost->state = state;
460 * ibmvfc_set_host_action - Set the next init action for the host
461 * @vhost: ibmvfc host struct
462 * @action: action to perform
465 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
466 enum ibmvfc_host_action action)
469 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
470 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
471 vhost->action = action;
473 case IBMVFC_HOST_ACTION_LOGO_WAIT:
474 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
475 vhost->action = action;
477 case IBMVFC_HOST_ACTION_INIT_WAIT:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
479 vhost->action = action;
481 case IBMVFC_HOST_ACTION_QUERY:
482 switch (vhost->action) {
483 case IBMVFC_HOST_ACTION_INIT_WAIT:
484 case IBMVFC_HOST_ACTION_NONE:
485 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
486 vhost->action = action;
492 case IBMVFC_HOST_ACTION_TGT_INIT:
493 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
494 vhost->action = action;
496 case IBMVFC_HOST_ACTION_INIT:
497 case IBMVFC_HOST_ACTION_TGT_DEL:
498 switch (vhost->action) {
499 case IBMVFC_HOST_ACTION_RESET:
500 case IBMVFC_HOST_ACTION_REENABLE:
503 vhost->action = action;
507 case IBMVFC_HOST_ACTION_LOGO:
508 case IBMVFC_HOST_ACTION_QUERY_TGTS:
509 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
510 case IBMVFC_HOST_ACTION_NONE:
511 case IBMVFC_HOST_ACTION_RESET:
512 case IBMVFC_HOST_ACTION_REENABLE:
514 vhost->action = action;
520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
521 * @vhost: ibmvfc host struct
526 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
528 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
529 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
530 scsi_block_requests(vhost->host);
531 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
536 wake_up(&vhost->work_wait_q);
540 * ibmvfc_link_down - Handle a link down event from the adapter
541 * @vhost: ibmvfc host struct
542 * @state: ibmvfc host state to enter
545 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
546 enum ibmvfc_host_state state)
548 struct ibmvfc_target *tgt;
551 scsi_block_requests(vhost->host);
552 list_for_each_entry(tgt, &vhost->targets, queue)
553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
554 ibmvfc_set_host_state(vhost, state);
555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
556 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
557 wake_up(&vhost->work_wait_q);
562 * ibmvfc_init_host - Start host initialization
563 * @vhost: ibmvfc host struct
568 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
570 struct ibmvfc_target *tgt;
572 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
573 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
575 "Host initialization retries exceeded. Taking adapter offline\n");
576 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
581 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
582 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
583 vhost->async_crq.cur = 0;
585 list_for_each_entry(tgt, &vhost->targets, queue)
586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
587 scsi_block_requests(vhost->host);
588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
589 vhost->job_step = ibmvfc_npiv_login;
590 wake_up(&vhost->work_wait_q);
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
601 * 0 on success / other on failure
603 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
605 struct vio_dev *vdev = to_vio_dev(vhost->dev);
606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
614 * 0 on success / other on failure
616 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
618 ibmvfc_dbg(vhost, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
627 * 0 on success / other on failure
629 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
642 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
645 struct vio_dev *vdev = to_vio_dev(vhost->dev);
646 struct ibmvfc_crq_queue *crq = &vhost->crq;
648 ibmvfc_dbg(vhost, "Releasing CRQ\n");
649 free_irq(vdev->irq, vhost);
650 tasklet_kill(&vhost->tasklet);
654 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
655 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
657 vhost->state = IBMVFC_NO_CRQ;
658 vhost->logged_in = 0;
659 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
660 free_page((unsigned long)crq->msgs);
664 * ibmvfc_reenable_crq_queue - reenables the CRQ
665 * @vhost: ibmvfc host struct
668 * 0 on success / other on failure
670 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
673 struct vio_dev *vdev = to_vio_dev(vhost->dev);
675 /* Re-enable the CRQ */
679 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
680 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
683 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
689 * ibmvfc_reset_crq - resets a crq after a failure
690 * @vhost: ibmvfc host struct
693 * 0 on success / other on failure
695 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
699 struct vio_dev *vdev = to_vio_dev(vhost->dev);
700 struct ibmvfc_crq_queue *crq = &vhost->crq;
706 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
707 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
709 spin_lock_irqsave(vhost->host->host_lock, flags);
710 vhost->state = IBMVFC_NO_CRQ;
711 vhost->logged_in = 0;
713 /* Clean out the queue */
714 memset(crq->msgs, 0, PAGE_SIZE);
717 /* And re-open it again */
718 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
719 crq->msg_token, PAGE_SIZE);
722 /* Adapter is good, but other end is not ready */
723 dev_warn(vhost->dev, "Partner adapter not ready\n");
725 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
726 spin_unlock_irqrestore(vhost->host->host_lock, flags);
732 * ibmvfc_valid_event - Determines if event is valid.
733 * @pool: event_pool that contains the event
734 * @evt: ibmvfc event to be checked for validity
737 * 1 if event is valid / 0 if event is not valid
739 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
740 struct ibmvfc_event *evt)
742 int index = evt - pool->events;
743 if (index < 0 || index >= pool->size) /* outside of bounds */
745 if (evt != pool->events + index) /* unaligned */
751 * ibmvfc_free_event - Free the specified event
752 * @evt: ibmvfc_event to be freed
755 static void ibmvfc_free_event(struct ibmvfc_event *evt)
757 struct ibmvfc_host *vhost = evt->vhost;
758 struct ibmvfc_event_pool *pool = &vhost->pool;
760 BUG_ON(!ibmvfc_valid_event(pool, evt));
761 BUG_ON(atomic_inc_return(&evt->free) != 1);
762 list_add_tail(&evt->queue, &vhost->free);
766 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
767 * @evt: ibmvfc event struct
769 * This function does not setup any error status, that must be done
770 * before this function gets called.
772 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
774 struct scsi_cmnd *cmnd = evt->cmnd;
777 scsi_dma_unmap(cmnd);
778 cmnd->scsi_done(cmnd);
782 complete(evt->eh_comp);
784 ibmvfc_free_event(evt);
788 * ibmvfc_fail_request - Fail request with specified error code
789 * @evt: ibmvfc event struct
790 * @error_code: error code to fail request with
795 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
798 evt->cmnd->result = (error_code << 16);
799 evt->done = ibmvfc_scsi_eh_done;
801 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
803 list_del(&evt->queue);
804 del_timer(&evt->timer);
810 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
811 * @vhost: ibmvfc host struct
812 * @error_code: error code to fail requests with
817 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
819 struct ibmvfc_event *evt, *pos;
821 ibmvfc_dbg(vhost, "Purging all requests\n");
822 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
823 ibmvfc_fail_request(evt, error_code);
827 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
828 * @vhost: struct ibmvfc host to reset
830 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
832 ibmvfc_purge_requests(vhost, DID_ERROR);
833 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
834 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
839 * @vhost: struct ibmvfc host to reset
841 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
845 scsi_block_requests(vhost->host);
846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
847 vhost->job_step = ibmvfc_npiv_logout;
848 wake_up(&vhost->work_wait_q);
850 ibmvfc_hard_reset_host(vhost);
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
857 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
861 spin_lock_irqsave(vhost->host->host_lock, flags);
862 __ibmvfc_reset_host(vhost);
863 spin_unlock_irqrestore(vhost->host->host_lock, flags);
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
870 * Returns: 1 if init will be retried / 0 if not
873 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
878 vhost->delay_init = 1;
879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
884 __ibmvfc_reset_host(vhost);
886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
891 wake_up(&vhost->work_wait_q);
896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
897 * @starget: scsi target struct
900 * ibmvfc_target struct / NULL if not found
902 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
905 struct ibmvfc_host *vhost = shost_priv(shost);
906 struct ibmvfc_target *tgt;
908 list_for_each_entry(tgt, &vhost->targets, queue)
909 if (tgt->target_id == starget->id) {
910 kref_get(&tgt->kref);
917 * ibmvfc_get_target - Find the specified scsi_target
918 * @starget: scsi target struct
921 * ibmvfc_target struct / NULL if not found
923 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
926 struct ibmvfc_target *tgt;
929 spin_lock_irqsave(shost->host_lock, flags);
930 tgt = __ibmvfc_get_target(starget);
931 spin_unlock_irqrestore(shost->host_lock, flags);
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
942 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
944 struct ibmvfc_host *vhost = shost_priv(shost);
947 spin_lock_irqsave(shost->host_lock, flags);
948 if (vhost->state == IBMVFC_ACTIVE) {
949 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
970 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
976 spin_unlock_irqrestore(shost->host_lock, flags);
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
986 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
988 struct ibmvfc_host *vhost = shost_priv(shost);
991 spin_lock_irqsave(shost->host_lock, flags);
992 switch (vhost->state) {
993 case IBMVFC_INITIALIZING:
995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
997 case IBMVFC_LINK_DOWN:
998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1000 case IBMVFC_LINK_DEAD:
1001 case IBMVFC_HOST_OFFLINE:
1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1015 spin_unlock_irqrestore(shost->host_lock, flags);
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1026 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1029 rport->dev_loss_tmo = timeout;
1031 rport->dev_loss_tmo = 1;
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1039 static void ibmvfc_release_tgt(struct kref *kref)
1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1052 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1057 kref_put(&tgt->kref, ibmvfc_release_tgt);
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1067 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1072 kref_put(&tgt->kref, ibmvfc_release_tgt);
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1082 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1087 kref_put(&tgt->kref, ibmvfc_release_tgt);
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1095 * 0 on success / other on failure
1097 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1099 long timeout = wait_event_timeout(vhost->init_wait_q,
1100 ((vhost->state == IBMVFC_ACTIVE ||
1101 vhost->state == IBMVFC_HOST_OFFLINE ||
1102 vhost->state == IBMVFC_LINK_DEAD) &&
1103 vhost->action == IBMVFC_HOST_ACTION_NONE),
1104 (init_timeout * HZ));
1106 return timeout ? 0 : -EIO;
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1114 * 0 on success / other on failure
1116 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1118 struct ibmvfc_host *vhost = shost_priv(shost);
1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost);
1122 return ibmvfc_wait_while_resetting(vhost);
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1131 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1133 struct device_node *rootdn;
1135 const unsigned int *num;
1137 rootdn = of_find_node_by_path("/");
1141 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1144 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1146 vhost->partition_number = *num;
1147 of_node_put(rootdn);
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1157 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1160 struct device_node *of_node = vhost->dev->of_node;
1161 const char *location;
1163 memset(login_info, 0, sizeof(*login_info));
1165 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1166 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1167 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1168 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1169 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1170 login_info->vfc_frame_version = cpu_to_be32(1);
1171 login_info->fcp_version = cpu_to_be16(3);
1172 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
1173 if (vhost->client_migrated)
1174 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
1176 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1177 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1178 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1179 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1181 strncpy(login_info->device_name,
1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1184 location = of_get_property(of_node, "ibm,loc-code", NULL);
1185 location = location ? location : dev_name(vhost->dev);
1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1193 * Returns zero on success.
1195 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1198 struct ibmvfc_event_pool *pool = &vhost->pool;
1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1206 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1207 pool->size * sizeof(*pool->iu_storage),
1208 &pool->iu_token, 0);
1210 if (!pool->iu_storage) {
1211 kfree(pool->events);
1215 for (i = 0; i < pool->size; ++i) {
1216 struct ibmvfc_event *evt = &pool->events[i];
1217 atomic_set(&evt->free, 1);
1218 evt->crq.valid = 0x80;
1219 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
1220 evt->xfer_iu = pool->iu_storage + i;
1222 evt->ext_list = NULL;
1223 list_add_tail(&evt->queue, &vhost->free);
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1235 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1238 struct ibmvfc_event_pool *pool = &vhost->pool;
1241 for (i = 0; i < pool->size; ++i) {
1242 list_del(&pool->events[i].queue);
1243 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1244 if (pool->events[i].ext_list)
1245 dma_pool_free(vhost->sg_pool,
1246 pool->events[i].ext_list,
1247 pool->events[i].ext_list_token);
1250 kfree(pool->events);
1251 dma_free_coherent(vhost->dev,
1252 pool->size * sizeof(*pool->iu_storage),
1253 pool->iu_storage, pool->iu_token);
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1261 * Returns a free event from the pool.
1263 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1265 struct ibmvfc_event *evt;
1267 BUG_ON(list_empty(&vhost->free));
1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1269 atomic_set(&evt->free, 0);
1270 list_del(&evt->queue);
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1281 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1282 void (*done) (struct ibmvfc_event *), u8 format)
1285 evt->sync_iu = NULL;
1286 evt->crq.format = format;
1288 evt->eh_comp = NULL;
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1297 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1298 struct srp_direct_buf *md)
1301 struct scatterlist *sg;
1303 scsi_for_each_sg(scmd, sg, nseg, i) {
1304 md[i].va = cpu_to_be64(sg_dma_address(sg));
1305 md[i].len = cpu_to_be32(sg_dma_len(sg));
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1312 * @scmd: struct scsi_cmnd with the scatterlist
1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1318 * 0 on success / non-zero on failure
1320 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1321 struct ibmvfc_event *evt,
1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1326 struct srp_direct_buf *data = &vfc_cmd->ioba;
1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1330 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1332 sg_mapped = scsi_dma_map(scmd);
1334 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
1336 } else if (unlikely(sg_mapped < 0)) {
1337 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1338 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1342 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1346 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
1347 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1350 if (sg_mapped == 1) {
1351 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1355 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
1357 if (!evt->ext_list) {
1358 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1359 &evt->ext_list_token);
1361 if (!evt->ext_list) {
1362 scsi_dma_unmap(scmd);
1363 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1364 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1369 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1371 data->va = cpu_to_be64(evt->ext_list_token);
1372 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
1378 * ibmvfc_timeout - Internal command timeout handler
1379 * @evt: struct ibmvfc_event that timed out
1381 * Called when an internally generated command times out
1383 static void ibmvfc_timeout(struct timer_list *t)
1385 struct ibmvfc_event *evt = from_timer(evt, t, timer);
1386 struct ibmvfc_host *vhost = evt->vhost;
1387 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1388 ibmvfc_reset_host(vhost);
1392 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1393 * @evt: event to be sent
1394 * @vhost: ibmvfc host struct
1395 * @timeout: timeout in seconds - 0 means do not time command
1397 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1399 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1400 struct ibmvfc_host *vhost, unsigned long timeout)
1402 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
1405 /* Copy the IU into the transfer area */
1406 *evt->xfer_iu = evt->iu;
1407 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1408 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
1409 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1410 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
1414 list_add_tail(&evt->queue, &vhost->sent);
1415 timer_setup(&evt->timer, ibmvfc_timeout, 0);
1418 evt->timer.expires = jiffies + (timeout * HZ);
1419 add_timer(&evt->timer);
1424 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1425 be64_to_cpu(crq_as_u64[1])))) {
1426 list_del(&evt->queue);
1427 del_timer(&evt->timer);
1429 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1430 * Firmware will send a CRQ with a transport event (0xFF) to
1431 * tell this client what has happened to the transport. This
1432 * will be handled in ibmvfc_handle_crq()
1434 if (rc == H_CLOSED) {
1435 if (printk_ratelimit())
1436 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1438 scsi_dma_unmap(evt->cmnd);
1439 ibmvfc_free_event(evt);
1440 return SCSI_MLQUEUE_HOST_BUSY;
1443 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1445 evt->cmnd->result = DID_ERROR << 16;
1446 evt->done = ibmvfc_scsi_eh_done;
1448 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
1452 ibmvfc_trc_start(evt);
1458 * ibmvfc_log_error - Log an error for the failed command if appropriate
1459 * @evt: ibmvfc event to log
1462 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1464 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1465 struct ibmvfc_host *vhost = evt->vhost;
1466 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1467 struct scsi_cmnd *cmnd = evt->cmnd;
1468 const char *err = unknown_error;
1469 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
1474 logerr = cmd_status[index].log;
1475 err = cmd_status[index].name;
1478 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1481 if (rsp->flags & FCP_RSP_LEN_VALID)
1482 rsp_code = rsp->data.info.rsp_code;
1484 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
1485 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1486 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error),
1487 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1491 * ibmvfc_relogin - Log back into the specified device
1492 * @sdev: scsi device struct
1495 static void ibmvfc_relogin(struct scsi_device *sdev)
1497 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1498 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1499 struct ibmvfc_target *tgt;
1501 list_for_each_entry(tgt, &vhost->targets, queue) {
1502 if (rport == tgt->rport) {
1503 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1508 ibmvfc_reinit_host(vhost);
1512 * ibmvfc_scsi_done - Handle responses from commands
1513 * @evt: ibmvfc event to be handled
1515 * Used as a callback when sending scsi cmds.
1517 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1519 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1520 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1521 struct scsi_cmnd *cmnd = evt->cmnd;
1523 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
1526 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1527 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
1528 else if (rsp->flags & FCP_RESID_UNDER)
1529 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
1531 scsi_set_resid(cmnd, 0);
1533 if (vfc_cmd->status) {
1534 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1536 if (rsp->flags & FCP_RSP_LEN_VALID)
1537 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
1538 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1539 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1540 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1541 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1542 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1543 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
1544 ibmvfc_relogin(cmnd->device);
1546 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1547 cmnd->result = (DID_ERROR << 16);
1549 ibmvfc_log_error(evt);
1552 if (!cmnd->result &&
1553 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1554 cmnd->result = (DID_ERROR << 16);
1556 scsi_dma_unmap(cmnd);
1557 cmnd->scsi_done(cmnd);
1561 complete(evt->eh_comp);
1563 ibmvfc_free_event(evt);
1567 * ibmvfc_host_chkready - Check if the host can accept commands
1568 * @vhost: struct ibmvfc host
1571 * 1 if host can accept command / 0 if not
1573 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1577 switch (vhost->state) {
1578 case IBMVFC_LINK_DEAD:
1579 case IBMVFC_HOST_OFFLINE:
1580 result = DID_NO_CONNECT << 16;
1583 case IBMVFC_INITIALIZING:
1585 case IBMVFC_LINK_DOWN:
1586 result = DID_REQUEUE << 16;
1597 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1598 * @cmnd: struct scsi_cmnd to be executed
1599 * @done: Callback function to be called when cmnd is completed
1602 * 0 on success / other on failure
1604 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
1605 void (*done) (struct scsi_cmnd *))
1607 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1608 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1609 struct ibmvfc_cmd *vfc_cmd;
1610 struct ibmvfc_event *evt;
1613 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1614 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1620 cmnd->result = (DID_OK << 16);
1621 evt = ibmvfc_get_event(vhost);
1622 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1624 cmnd->scsi_done = done;
1625 vfc_cmd = &evt->iu.cmd;
1626 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1627 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1628 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1629 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1630 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1631 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1632 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1633 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1634 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1635 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1636 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1638 if (cmnd->flags & SCMD_TAGGED) {
1639 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1640 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1643 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1644 return ibmvfc_send_event(evt, vhost, 0);
1646 ibmvfc_free_event(evt);
1648 return SCSI_MLQUEUE_HOST_BUSY;
1650 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1651 scmd_printk(KERN_ERR, cmnd,
1652 "Failed to map DMA buffer for command. rc=%d\n", rc);
1654 cmnd->result = DID_ERROR << 16;
1659 static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1662 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1663 * @evt: ibmvfc event struct
1666 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1668 /* copy the response back */
1670 *evt->sync_iu = *evt->xfer_iu;
1672 complete(&evt->comp);
1676 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1677 * @evt: struct ibmvfc_event
1680 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1682 struct ibmvfc_host *vhost = evt->vhost;
1684 ibmvfc_free_event(evt);
1685 vhost->aborting_passthru = 0;
1686 dev_info(vhost->dev, "Passthru command cancelled\n");
1690 * ibmvfc_bsg_timeout - Handle a BSG timeout
1691 * @job: struct bsg_job that timed out
1694 * 0 on success / other on failure
1696 static int ibmvfc_bsg_timeout(struct bsg_job *job)
1698 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1699 unsigned long port_id = (unsigned long)job->dd_data;
1700 struct ibmvfc_event *evt;
1701 struct ibmvfc_tmf *tmf;
1702 unsigned long flags;
1706 spin_lock_irqsave(vhost->host->host_lock, flags);
1707 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1708 __ibmvfc_reset_host(vhost);
1709 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1713 vhost->aborting_passthru = 1;
1714 evt = ibmvfc_get_event(vhost);
1715 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1718 memset(tmf, 0, sizeof(*tmf));
1719 tmf->common.version = cpu_to_be32(1);
1720 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1721 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1722 tmf->scsi_id = cpu_to_be64(port_id);
1723 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1724 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
1725 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1728 vhost->aborting_passthru = 0;
1729 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1732 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1735 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1742 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1743 * @vhost: struct ibmvfc_host to send command
1744 * @port_id: port ID to send command
1747 * 0 on success / other on failure
1749 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1751 struct ibmvfc_port_login *plogi;
1752 struct ibmvfc_target *tgt;
1753 struct ibmvfc_event *evt;
1754 union ibmvfc_iu rsp_iu;
1755 unsigned long flags;
1756 int rc = 0, issue_login = 1;
1759 spin_lock_irqsave(vhost->host->host_lock, flags);
1760 list_for_each_entry(tgt, &vhost->targets, queue) {
1761 if (tgt->scsi_id == port_id) {
1769 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1772 evt = ibmvfc_get_event(vhost);
1773 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1774 plogi = &evt->iu.plogi;
1775 memset(plogi, 0, sizeof(*plogi));
1776 plogi->common.version = cpu_to_be32(1);
1777 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1778 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1779 plogi->scsi_id = cpu_to_be64(port_id);
1780 evt->sync_iu = &rsp_iu;
1781 init_completion(&evt->comp);
1783 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1784 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1789 wait_for_completion(&evt->comp);
1791 if (rsp_iu.plogi.common.status)
1794 spin_lock_irqsave(vhost->host->host_lock, flags);
1795 ibmvfc_free_event(evt);
1797 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1803 * ibmvfc_bsg_request - Handle a BSG request
1804 * @job: struct bsg_job to be executed
1807 * 0 on success / other on failure
1809 static int ibmvfc_bsg_request(struct bsg_job *job)
1811 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1812 struct fc_rport *rport = fc_bsg_to_rport(job);
1813 struct ibmvfc_passthru_mad *mad;
1814 struct ibmvfc_event *evt;
1815 union ibmvfc_iu rsp_iu;
1816 unsigned long flags, port_id = -1;
1817 struct fc_bsg_request *bsg_request = job->request;
1818 struct fc_bsg_reply *bsg_reply = job->reply;
1819 unsigned int code = bsg_request->msgcode;
1820 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1821 u32 fc_flags, rsp_len;
1824 bsg_reply->reply_payload_rcv_len = 0;
1826 port_id = rport->port_id;
1829 case FC_BSG_HST_ELS_NOLOGIN:
1830 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
1831 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
1832 bsg_request->rqst_data.h_els.port_id[2];
1833 case FC_BSG_RPT_ELS:
1834 fc_flags = IBMVFC_FC_ELS;
1838 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
1839 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
1840 bsg_request->rqst_data.h_ct.port_id[2];
1842 fc_flags = IBMVFC_FC_CT_IU;
1850 if (!mutex_trylock(&vhost->passthru_mutex))
1853 job->dd_data = (void *)port_id;
1854 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1855 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1858 mutex_unlock(&vhost->passthru_mutex);
1862 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1863 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1866 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1867 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1868 mutex_unlock(&vhost->passthru_mutex);
1872 if (req_seg > 1 || rsp_seg > 1) {
1878 rc = ibmvfc_bsg_plogi(vhost, port_id);
1880 spin_lock_irqsave(vhost->host->host_lock, flags);
1882 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1883 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1884 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1888 evt = ibmvfc_get_event(vhost);
1889 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1890 mad = &evt->iu.passthru;
1892 memset(mad, 0, sizeof(*mad));
1893 mad->common.version = cpu_to_be32(1);
1894 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1895 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1897 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1898 offsetof(struct ibmvfc_passthru_mad, iu));
1899 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1901 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1902 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1903 mad->iu.flags = cpu_to_be32(fc_flags);
1904 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1906 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1907 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1908 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1909 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1910 mad->iu.scsi_id = cpu_to_be64(port_id);
1911 mad->iu.tag = cpu_to_be64((u64)evt);
1912 rsp_len = be32_to_cpu(mad->iu.rsp.len);
1914 evt->sync_iu = &rsp_iu;
1915 init_completion(&evt->comp);
1916 rc = ibmvfc_send_event(evt, vhost, 0);
1917 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1924 wait_for_completion(&evt->comp);
1926 if (rsp_iu.passthru.common.status)
1929 bsg_reply->reply_payload_rcv_len = rsp_len;
1931 spin_lock_irqsave(vhost->host->host_lock, flags);
1932 ibmvfc_free_event(evt);
1933 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1934 bsg_reply->result = rc;
1935 bsg_job_done(job, bsg_reply->result,
1936 bsg_reply->reply_payload_rcv_len);
1939 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1940 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1941 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1942 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1943 mutex_unlock(&vhost->passthru_mutex);
1949 * ibmvfc_reset_device - Reset the device with the specified reset type
1950 * @sdev: scsi device to reset
1952 * @desc: reset type description for log messages
1955 * 0 on success / other on failure
1957 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1959 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1960 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1961 struct ibmvfc_cmd *tmf;
1962 struct ibmvfc_event *evt = NULL;
1963 union ibmvfc_iu rsp_iu;
1964 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1965 int rsp_rc = -EBUSY;
1966 unsigned long flags;
1969 spin_lock_irqsave(vhost->host->host_lock, flags);
1970 if (vhost->state == IBMVFC_ACTIVE) {
1971 evt = ibmvfc_get_event(vhost);
1972 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1975 memset(tmf, 0, sizeof(*tmf));
1976 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1977 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1978 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1979 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1980 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1981 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1982 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
1983 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1984 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
1985 tmf->iu.tmf_flags = type;
1986 evt->sync_iu = &rsp_iu;
1988 init_completion(&evt->comp);
1989 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1991 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1994 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1999 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2000 wait_for_completion(&evt->comp);
2002 if (rsp_iu.cmd.status)
2003 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2006 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2007 rsp_code = fc_rsp->data.info.rsp_code;
2009 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2010 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2011 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2012 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
2013 fc_rsp->scsi_status);
2016 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2018 spin_lock_irqsave(vhost->host->host_lock, flags);
2019 ibmvfc_free_event(evt);
2020 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2025 * ibmvfc_match_rport - Match function for specified remote port
2026 * @evt: ibmvfc event struct
2027 * @device: device to match (rport)
2030 * 1 if event matches rport / 0 if event does not match rport
2032 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
2034 struct fc_rport *cmd_rport;
2037 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2038 if (cmd_rport == rport)
2045 * ibmvfc_match_target - Match function for specified target
2046 * @evt: ibmvfc event struct
2047 * @device: device to match (starget)
2050 * 1 if event matches starget / 0 if event does not match starget
2052 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2054 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2060 * ibmvfc_match_lun - Match function for specified LUN
2061 * @evt: ibmvfc event struct
2062 * @device: device to match (sdev)
2065 * 1 if event matches sdev / 0 if event does not match sdev
2067 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2069 if (evt->cmnd && evt->cmnd->device == device)
2075 * ibmvfc_wait_for_ops - Wait for ops to complete
2076 * @vhost: ibmvfc host struct
2077 * @device: device to match (starget or sdev)
2078 * @match: match function
2083 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2084 int (*match) (struct ibmvfc_event *, void *))
2086 struct ibmvfc_event *evt;
2087 DECLARE_COMPLETION_ONSTACK(comp);
2089 unsigned long flags;
2090 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2095 spin_lock_irqsave(vhost->host->host_lock, flags);
2096 list_for_each_entry(evt, &vhost->sent, queue) {
2097 if (match(evt, device)) {
2098 evt->eh_comp = ∁
2102 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2105 timeout = wait_for_completion_timeout(&comp, timeout);
2109 spin_lock_irqsave(vhost->host->host_lock, flags);
2110 list_for_each_entry(evt, &vhost->sent, queue) {
2111 if (match(evt, device)) {
2112 evt->eh_comp = NULL;
2116 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2118 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2120 return wait ? FAILED : SUCCESS;
2130 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2131 * @sdev: scsi device to cancel commands
2132 * @type: type of error recovery being performed
2134 * This sends a cancel to the VIOS for the specified device. This does
2135 * NOT send any abort to the actual device. That must be done separately.
2138 * 0 on success / other on failure
2140 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2142 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2143 struct scsi_target *starget = scsi_target(sdev);
2144 struct fc_rport *rport = starget_to_rport(starget);
2145 struct ibmvfc_tmf *tmf;
2146 struct ibmvfc_event *evt, *found_evt;
2147 union ibmvfc_iu rsp;
2148 int rsp_rc = -EBUSY;
2149 unsigned long flags;
2153 spin_lock_irqsave(vhost->host->host_lock, flags);
2155 list_for_each_entry(evt, &vhost->sent, queue) {
2156 if (evt->cmnd && evt->cmnd->device == sdev) {
2163 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2164 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2165 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2169 if (vhost->logged_in) {
2170 evt = ibmvfc_get_event(vhost);
2171 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2174 memset(tmf, 0, sizeof(*tmf));
2175 tmf->common.version = cpu_to_be32(1);
2176 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2177 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2178 tmf->scsi_id = cpu_to_be64(rport->port_id);
2179 int_to_scsilun(sdev->lun, &tmf->lun);
2180 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
2181 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
2182 if (vhost->state == IBMVFC_ACTIVE)
2183 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
2185 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2186 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2187 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
2189 evt->sync_iu = &rsp;
2190 init_completion(&evt->comp);
2191 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2194 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2197 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2198 /* If failure is received, the host adapter is most likely going
2199 through reset, return success so the caller will wait for the command
2200 being cancelled to get returned */
2204 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2206 wait_for_completion(&evt->comp);
2207 status = be16_to_cpu(rsp.mad_common.status);
2208 spin_lock_irqsave(vhost->host->host_lock, flags);
2209 ibmvfc_free_event(evt);
2210 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2212 if (status != IBMVFC_MAD_SUCCESS) {
2213 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2215 case IBMVFC_MAD_DRIVER_FAILED:
2216 case IBMVFC_MAD_CRQ_ERROR:
2217 /* Host adapter most likely going through reset, return success to
2218 the caller will wait for the command being cancelled to get returned */
2225 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2230 * ibmvfc_match_key - Match function for specified cancel key
2231 * @evt: ibmvfc event struct
2232 * @key: cancel key to match
2235 * 1 if event matches key / 0 if event does not match key
2237 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
2239 unsigned long cancel_key = (unsigned long)key;
2241 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
2242 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
2248 * ibmvfc_match_evt - Match function for specified event
2249 * @evt: ibmvfc event struct
2250 * @match: event to match
2253 * 1 if event matches key / 0 if event does not match key
2255 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2263 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2264 * @sdev: scsi device to abort commands
2266 * This sends an Abort Task Set to the VIOS for the specified device. This does
2267 * NOT send any cancel to the VIOS. That must be done separately.
2270 * 0 on success / other on failure
2272 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2274 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2275 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2276 struct ibmvfc_cmd *tmf;
2277 struct ibmvfc_event *evt, *found_evt;
2278 union ibmvfc_iu rsp_iu;
2279 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2280 int rc, rsp_rc = -EBUSY;
2281 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2284 spin_lock_irqsave(vhost->host->host_lock, flags);
2286 list_for_each_entry(evt, &vhost->sent, queue) {
2287 if (evt->cmnd && evt->cmnd->device == sdev) {
2294 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2295 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2296 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2300 if (vhost->state == IBMVFC_ACTIVE) {
2301 evt = ibmvfc_get_event(vhost);
2302 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2305 memset(tmf, 0, sizeof(*tmf));
2306 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2307 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2308 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2309 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2310 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2311 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2312 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
2313 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2314 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2315 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2316 evt->sync_iu = &rsp_iu;
2318 init_completion(&evt->comp);
2319 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2322 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2325 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2329 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2330 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2333 rc = ibmvfc_cancel_all(sdev, 0);
2335 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2341 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2342 ibmvfc_reset_host(vhost);
2344 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2349 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2350 if (rc != SUCCESS) {
2351 spin_lock_irqsave(vhost->host->host_lock, flags);
2352 ibmvfc_hard_reset_host(vhost);
2353 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2361 if (rsp_iu.cmd.status)
2362 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2365 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2366 rsp_code = fc_rsp->data.info.rsp_code;
2368 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2369 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2370 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2371 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
2372 fc_rsp->scsi_status);
2375 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2378 spin_lock_irqsave(vhost->host->host_lock, flags);
2379 ibmvfc_free_event(evt);
2380 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2385 * ibmvfc_eh_abort_handler - Abort a command
2386 * @cmd: scsi command to abort
2389 * SUCCESS / FAST_IO_FAIL / FAILED
2391 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2393 struct scsi_device *sdev = cmd->device;
2394 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2395 int cancel_rc, block_rc;
2399 block_rc = fc_block_scsi_eh(cmd);
2400 ibmvfc_wait_while_resetting(vhost);
2401 if (block_rc != FAST_IO_FAIL) {
2402 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2403 ibmvfc_abort_task_set(sdev);
2405 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2408 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2410 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2418 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2419 * @cmd: scsi command struct
2422 * SUCCESS / FAST_IO_FAIL / FAILED
2424 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2426 struct scsi_device *sdev = cmd->device;
2427 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2428 int cancel_rc, block_rc, reset_rc = 0;
2432 block_rc = fc_block_scsi_eh(cmd);
2433 ibmvfc_wait_while_resetting(vhost);
2434 if (block_rc != FAST_IO_FAIL) {
2435 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2436 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2438 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2440 if (!cancel_rc && !reset_rc)
2441 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2443 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2451 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2452 * @sdev: scsi device struct
2453 * @data: return code
2456 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2458 unsigned long *rc = data;
2459 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2463 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2464 * @sdev: scsi device struct
2465 * @data: return code
2468 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2470 unsigned long *rc = data;
2471 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2475 * ibmvfc_eh_target_reset_handler - Reset the target
2476 * @cmd: scsi command struct
2479 * SUCCESS / FAST_IO_FAIL / FAILED
2481 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2483 struct scsi_device *sdev = cmd->device;
2484 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2485 struct scsi_target *starget = scsi_target(sdev);
2489 unsigned long cancel_rc = 0;
2492 block_rc = fc_block_scsi_eh(cmd);
2493 ibmvfc_wait_while_resetting(vhost);
2494 if (block_rc != FAST_IO_FAIL) {
2495 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2496 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2498 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
2500 if (!cancel_rc && !reset_rc)
2501 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2503 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2511 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2512 * @cmd: struct scsi_cmnd having problems
2515 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2518 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2520 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2521 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2523 return rc ? FAILED : SUCCESS;
2527 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2528 * @rport: rport struct
2533 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2535 struct Scsi_Host *shost = rport_to_shost(rport);
2536 struct ibmvfc_host *vhost = shost_priv(shost);
2537 struct fc_rport *dev_rport;
2538 struct scsi_device *sdev;
2542 shost_for_each_device(sdev, shost) {
2543 dev_rport = starget_to_rport(scsi_target(sdev));
2544 if (dev_rport != rport)
2546 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2549 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
2552 ibmvfc_issue_fc_host_lip(shost);
2556 static const struct ibmvfc_async_desc ae_desc [] = {
2557 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2558 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2559 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2560 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2561 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2562 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2563 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2564 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2565 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2566 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2567 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2568 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2569 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
2572 static const struct ibmvfc_async_desc unknown_ae = {
2573 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
2577 * ibmvfc_get_ae_desc - Get text description for async event
2581 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
2585 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2586 if (ae_desc[i].ae == ae)
2592 static const struct {
2593 enum ibmvfc_ae_link_state state;
2596 { IBMVFC_AE_LS_LINK_UP, " link up" },
2597 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2598 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2599 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2603 * ibmvfc_get_link_state - Get text description for link state
2604 * @state: link state
2607 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2611 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2612 if (link_desc[i].state == state)
2613 return link_desc[i].desc;
2619 * ibmvfc_handle_async - Handle an async event from the adapter
2620 * @crq: crq to process
2621 * @vhost: ibmvfc host struct
2624 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2625 struct ibmvfc_host *vhost)
2627 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
2628 struct ibmvfc_target *tgt;
2630 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
2631 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2632 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
2633 ibmvfc_get_link_state(crq->link_state));
2635 switch (be64_to_cpu(crq->event)) {
2636 case IBMVFC_AE_RESUME:
2637 switch (crq->link_state) {
2638 case IBMVFC_AE_LS_LINK_DOWN:
2639 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2641 case IBMVFC_AE_LS_LINK_DEAD:
2642 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2644 case IBMVFC_AE_LS_LINK_UP:
2645 case IBMVFC_AE_LS_LINK_BOUNCED:
2647 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2648 vhost->delay_init = 1;
2649 __ibmvfc_reset_host(vhost);
2654 case IBMVFC_AE_LINK_UP:
2655 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2656 vhost->delay_init = 1;
2657 __ibmvfc_reset_host(vhost);
2659 case IBMVFC_AE_SCN_FABRIC:
2660 case IBMVFC_AE_SCN_DOMAIN:
2661 vhost->events_to_log |= IBMVFC_AE_RSCN;
2662 if (vhost->state < IBMVFC_HALTED) {
2663 vhost->delay_init = 1;
2664 __ibmvfc_reset_host(vhost);
2667 case IBMVFC_AE_SCN_NPORT:
2668 case IBMVFC_AE_SCN_GROUP:
2669 vhost->events_to_log |= IBMVFC_AE_RSCN;
2670 ibmvfc_reinit_host(vhost);
2672 case IBMVFC_AE_ELS_LOGO:
2673 case IBMVFC_AE_ELS_PRLO:
2674 case IBMVFC_AE_ELS_PLOGI:
2675 list_for_each_entry(tgt, &vhost->targets, queue) {
2676 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2678 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
2680 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
2682 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
2684 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
2686 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
2687 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2688 ibmvfc_reinit_host(vhost);
2692 case IBMVFC_AE_LINK_DOWN:
2693 case IBMVFC_AE_ADAPTER_FAILED:
2694 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2696 case IBMVFC_AE_LINK_DEAD:
2697 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2699 case IBMVFC_AE_HALT:
2700 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2703 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2709 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2710 * @crq: Command/Response queue
2711 * @vhost: ibmvfc host struct
2714 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2717 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
2719 switch (crq->valid) {
2720 case IBMVFC_CRQ_INIT_RSP:
2721 switch (crq->format) {
2722 case IBMVFC_CRQ_INIT:
2723 dev_info(vhost->dev, "Partner initialized\n");
2724 /* Send back a response */
2725 rc = ibmvfc_send_crq_init_complete(vhost);
2727 ibmvfc_init_host(vhost);
2729 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2731 case IBMVFC_CRQ_INIT_COMPLETE:
2732 dev_info(vhost->dev, "Partner initialization complete\n");
2733 ibmvfc_init_host(vhost);
2736 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2739 case IBMVFC_CRQ_XPORT_EVENT:
2740 vhost->state = IBMVFC_NO_CRQ;
2741 vhost->logged_in = 0;
2742 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2743 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2744 /* We need to re-setup the interpartition connection */
2745 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n");
2746 vhost->client_migrated = 1;
2747 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2748 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2749 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
2750 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) {
2751 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format);
2752 ibmvfc_purge_requests(vhost, DID_ERROR);
2753 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2754 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
2756 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format);
2759 case IBMVFC_CRQ_CMD_RSP:
2762 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2766 if (crq->format == IBMVFC_ASYNC_EVENT)
2769 /* The only kind of payload CRQs we should get are responses to
2770 * things we send. Make sure this response is to something we
2773 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2774 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2779 if (unlikely(atomic_read(&evt->free))) {
2780 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2785 del_timer(&evt->timer);
2786 list_del(&evt->queue);
2787 ibmvfc_trc_end(evt);
2792 * ibmvfc_scan_finished - Check if the device scan is done.
2793 * @shost: scsi host struct
2794 * @time: current elapsed time
2797 * 0 if scan is not done / 1 if scan is done
2799 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2801 unsigned long flags;
2802 struct ibmvfc_host *vhost = shost_priv(shost);
2805 spin_lock_irqsave(shost->host_lock, flags);
2806 if (time >= (init_timeout * HZ)) {
2807 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2808 "continuing initialization\n", init_timeout);
2812 if (vhost->scan_complete)
2814 spin_unlock_irqrestore(shost->host_lock, flags);
2819 * ibmvfc_slave_alloc - Setup the device's task set value
2820 * @sdev: struct scsi_device device to configure
2822 * Set the device's task set value so that error handling works as
2826 * 0 on success / -ENXIO if device does not exist
2828 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2830 struct Scsi_Host *shost = sdev->host;
2831 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2832 struct ibmvfc_host *vhost = shost_priv(shost);
2833 unsigned long flags = 0;
2835 if (!rport || fc_remote_port_chkready(rport))
2838 spin_lock_irqsave(shost->host_lock, flags);
2839 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2840 spin_unlock_irqrestore(shost->host_lock, flags);
2845 * ibmvfc_target_alloc - Setup the target's task set value
2846 * @starget: struct scsi_target
2848 * Set the target's task set value so that error handling works as
2852 * 0 on success / -ENXIO if device does not exist
2854 static int ibmvfc_target_alloc(struct scsi_target *starget)
2856 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2857 struct ibmvfc_host *vhost = shost_priv(shost);
2858 unsigned long flags = 0;
2860 spin_lock_irqsave(shost->host_lock, flags);
2861 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2862 spin_unlock_irqrestore(shost->host_lock, flags);
2867 * ibmvfc_slave_configure - Configure the device
2868 * @sdev: struct scsi_device device to configure
2870 * Enable allow_restart for a device if it is a disk. Adjust the
2871 * queue_depth here also.
2876 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2878 struct Scsi_Host *shost = sdev->host;
2879 unsigned long flags = 0;
2881 spin_lock_irqsave(shost->host_lock, flags);
2882 if (sdev->type == TYPE_DISK)
2883 sdev->allow_restart = 1;
2884 spin_unlock_irqrestore(shost->host_lock, flags);
2889 * ibmvfc_change_queue_depth - Change the device's queue depth
2890 * @sdev: scsi device struct
2891 * @qdepth: depth to set
2892 * @reason: calling context
2897 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2899 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2900 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2902 return scsi_change_queue_depth(sdev, qdepth);
2905 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2906 struct device_attribute *attr, char *buf)
2908 struct Scsi_Host *shost = class_to_shost(dev);
2909 struct ibmvfc_host *vhost = shost_priv(shost);
2911 return snprintf(buf, PAGE_SIZE, "%s\n",
2912 vhost->login_buf->resp.partition_name);
2915 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2916 struct device_attribute *attr, char *buf)
2918 struct Scsi_Host *shost = class_to_shost(dev);
2919 struct ibmvfc_host *vhost = shost_priv(shost);
2921 return snprintf(buf, PAGE_SIZE, "%s\n",
2922 vhost->login_buf->resp.device_name);
2925 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2926 struct device_attribute *attr, char *buf)
2928 struct Scsi_Host *shost = class_to_shost(dev);
2929 struct ibmvfc_host *vhost = shost_priv(shost);
2931 return snprintf(buf, PAGE_SIZE, "%s\n",
2932 vhost->login_buf->resp.port_loc_code);
2935 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2936 struct device_attribute *attr, char *buf)
2938 struct Scsi_Host *shost = class_to_shost(dev);
2939 struct ibmvfc_host *vhost = shost_priv(shost);
2941 return snprintf(buf, PAGE_SIZE, "%s\n",
2942 vhost->login_buf->resp.drc_name);
2945 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2946 struct device_attribute *attr, char *buf)
2948 struct Scsi_Host *shost = class_to_shost(dev);
2949 struct ibmvfc_host *vhost = shost_priv(shost);
2950 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2953 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2954 struct device_attribute *attr, char *buf)
2956 struct Scsi_Host *shost = class_to_shost(dev);
2957 struct ibmvfc_host *vhost = shost_priv(shost);
2958 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2962 * ibmvfc_show_log_level - Show the adapter's error logging level
2963 * @dev: class device struct
2967 * number of bytes printed to buffer
2969 static ssize_t ibmvfc_show_log_level(struct device *dev,
2970 struct device_attribute *attr, char *buf)
2972 struct Scsi_Host *shost = class_to_shost(dev);
2973 struct ibmvfc_host *vhost = shost_priv(shost);
2974 unsigned long flags = 0;
2977 spin_lock_irqsave(shost->host_lock, flags);
2978 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2979 spin_unlock_irqrestore(shost->host_lock, flags);
2984 * ibmvfc_store_log_level - Change the adapter's error logging level
2985 * @dev: class device struct
2989 * number of bytes printed to buffer
2991 static ssize_t ibmvfc_store_log_level(struct device *dev,
2992 struct device_attribute *attr,
2993 const char *buf, size_t count)
2995 struct Scsi_Host *shost = class_to_shost(dev);
2996 struct ibmvfc_host *vhost = shost_priv(shost);
2997 unsigned long flags = 0;
2999 spin_lock_irqsave(shost->host_lock, flags);
3000 vhost->log_level = simple_strtoul(buf, NULL, 10);
3001 spin_unlock_irqrestore(shost->host_lock, flags);
3005 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3006 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3007 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3008 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3009 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
3010 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
3011 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3012 ibmvfc_show_log_level, ibmvfc_store_log_level);
3014 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3016 * ibmvfc_read_trace - Dump the adapter trace
3017 * @filp: open sysfs file
3018 * @kobj: kobject struct
3019 * @bin_attr: bin_attribute struct
3022 * @count: buffer size
3025 * number of bytes printed to buffer
3027 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
3028 struct bin_attribute *bin_attr,
3029 char *buf, loff_t off, size_t count)
3031 struct device *dev = container_of(kobj, struct device, kobj);
3032 struct Scsi_Host *shost = class_to_shost(dev);
3033 struct ibmvfc_host *vhost = shost_priv(shost);
3034 unsigned long flags = 0;
3035 int size = IBMVFC_TRACE_SIZE;
3036 char *src = (char *)vhost->trace;
3040 if (off + count > size) {
3045 spin_lock_irqsave(shost->host_lock, flags);
3046 memcpy(buf, &src[off], count);
3047 spin_unlock_irqrestore(shost->host_lock, flags);
3051 static struct bin_attribute ibmvfc_trace_attr = {
3057 .read = ibmvfc_read_trace,
3061 static struct device_attribute *ibmvfc_attrs[] = {
3062 &dev_attr_partition_name,
3063 &dev_attr_device_name,
3064 &dev_attr_port_loc_code,
3066 &dev_attr_npiv_version,
3067 &dev_attr_capabilities,
3068 &dev_attr_log_level,
3072 static struct scsi_host_template driver_template = {
3073 .module = THIS_MODULE,
3074 .name = "IBM POWER Virtual FC Adapter",
3075 .proc_name = IBMVFC_NAME,
3076 .queuecommand = ibmvfc_queuecommand,
3077 .eh_timed_out = fc_eh_timed_out,
3078 .eh_abort_handler = ibmvfc_eh_abort_handler,
3079 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3080 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3081 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3082 .slave_alloc = ibmvfc_slave_alloc,
3083 .slave_configure = ibmvfc_slave_configure,
3084 .target_alloc = ibmvfc_target_alloc,
3085 .scan_finished = ibmvfc_scan_finished,
3086 .change_queue_depth = ibmvfc_change_queue_depth,
3088 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3090 .sg_tablesize = SG_ALL,
3091 .max_sectors = IBMVFC_MAX_SECTORS,
3092 .shost_attrs = ibmvfc_attrs,
3093 .track_queue_depth = 1,
3097 * ibmvfc_next_async_crq - Returns the next entry in async queue
3098 * @vhost: ibmvfc host struct
3101 * Pointer to next entry in queue / NULL if empty
3103 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3105 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3106 struct ibmvfc_async_crq *crq;
3108 crq = &async_crq->msgs[async_crq->cur];
3109 if (crq->valid & 0x80) {
3110 if (++async_crq->cur == async_crq->size)
3120 * ibmvfc_next_crq - Returns the next entry in message queue
3121 * @vhost: ibmvfc host struct
3124 * Pointer to next entry in queue / NULL if empty
3126 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3128 struct ibmvfc_crq_queue *queue = &vhost->crq;
3129 struct ibmvfc_crq *crq;
3131 crq = &queue->msgs[queue->cur];
3132 if (crq->valid & 0x80) {
3133 if (++queue->cur == queue->size)
3143 * ibmvfc_interrupt - Interrupt handler
3144 * @irq: number of irq to handle, not used
3145 * @dev_instance: ibmvfc_host that received interrupt
3150 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3152 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3153 unsigned long flags;
3155 spin_lock_irqsave(vhost->host->host_lock, flags);
3156 vio_disable_interrupts(to_vio_dev(vhost->dev));
3157 tasklet_schedule(&vhost->tasklet);
3158 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3163 * ibmvfc_tasklet - Interrupt handler tasklet
3164 * @data: ibmvfc host struct
3169 static void ibmvfc_tasklet(void *data)
3171 struct ibmvfc_host *vhost = data;
3172 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3173 struct ibmvfc_crq *crq;
3174 struct ibmvfc_async_crq *async;
3175 unsigned long flags;
3178 spin_lock_irqsave(vhost->host->host_lock, flags);
3180 /* Pull all the valid messages off the async CRQ */
3181 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3182 ibmvfc_handle_async(async, vhost);
3187 /* Pull all the valid messages off the CRQ */
3188 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3189 ibmvfc_handle_crq(crq, vhost);
3194 vio_enable_interrupts(vdev);
3195 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3196 vio_disable_interrupts(vdev);
3197 ibmvfc_handle_async(async, vhost);
3200 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3201 vio_disable_interrupts(vdev);
3202 ibmvfc_handle_crq(crq, vhost);
3209 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3213 * ibmvfc_init_tgt - Set the next init job step for the target
3214 * @tgt: ibmvfc target struct
3215 * @job_step: job step to perform
3218 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3219 void (*job_step) (struct ibmvfc_target *))
3221 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3222 tgt->job_step = job_step;
3223 wake_up(&tgt->vhost->work_wait_q);
3227 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3228 * @tgt: ibmvfc target struct
3229 * @job_step: initialization job step
3231 * Returns: 1 if step will be retried / 0 if not
3234 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3235 void (*job_step) (struct ibmvfc_target *))
3237 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3238 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3239 wake_up(&tgt->vhost->work_wait_q);
3242 ibmvfc_init_tgt(tgt, job_step);
3246 /* Defined in FC-LS */
3247 static const struct {
3264 * ibmvfc_get_prli_rsp - Find PRLI response index
3265 * @flags: PRLI response flags
3268 static int ibmvfc_get_prli_rsp(u16 flags)
3271 int code = (flags & 0x0f00) >> 8;
3273 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3274 if (prli_rsp[i].code == code)
3281 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3282 * @evt: ibmvfc event struct
3285 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3287 struct ibmvfc_target *tgt = evt->tgt;
3288 struct ibmvfc_host *vhost = evt->vhost;
3289 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3290 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3291 u32 status = be16_to_cpu(rsp->common.status);
3292 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3294 vhost->discovery_threads--;
3295 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3297 case IBMVFC_MAD_SUCCESS:
3298 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3299 parms->type, parms->flags, parms->service_parms);
3301 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3302 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
3303 if (prli_rsp[index].logged_in) {
3304 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
3305 tgt->need_login = 0;
3307 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
3308 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3309 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
3310 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3313 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3314 } else if (prli_rsp[index].retry)
3315 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3319 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3321 case IBMVFC_MAD_DRIVER_FAILED:
3323 case IBMVFC_MAD_CRQ_ERROR:
3324 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3326 case IBMVFC_MAD_FAILED:
3328 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3329 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
3330 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3331 else if (tgt->logo_rcvd)
3332 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3333 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3334 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3336 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3338 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3339 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3340 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status);
3344 kref_put(&tgt->kref, ibmvfc_release_tgt);
3345 ibmvfc_free_event(evt);
3346 wake_up(&vhost->work_wait_q);
3350 * ibmvfc_tgt_send_prli - Send a process login
3351 * @tgt: ibmvfc target struct
3354 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3356 struct ibmvfc_process_login *prli;
3357 struct ibmvfc_host *vhost = tgt->vhost;
3358 struct ibmvfc_event *evt;
3360 if (vhost->discovery_threads >= disc_threads)
3363 kref_get(&tgt->kref);
3364 evt = ibmvfc_get_event(vhost);
3365 vhost->discovery_threads++;
3366 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3368 prli = &evt->iu.prli;
3369 memset(prli, 0, sizeof(*prli));
3370 prli->common.version = cpu_to_be32(1);
3371 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3372 prli->common.length = cpu_to_be16(sizeof(*prli));
3373 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
3375 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3376 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3377 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
3378 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
3381 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3383 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3384 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3385 vhost->discovery_threads--;
3386 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3387 kref_put(&tgt->kref, ibmvfc_release_tgt);
3389 tgt_dbg(tgt, "Sent process login\n");
3393 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3394 * @evt: ibmvfc event struct
3397 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3399 struct ibmvfc_target *tgt = evt->tgt;
3400 struct ibmvfc_host *vhost = evt->vhost;
3401 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3402 u32 status = be16_to_cpu(rsp->common.status);
3403 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3405 vhost->discovery_threads--;
3406 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3408 case IBMVFC_MAD_SUCCESS:
3409 tgt_dbg(tgt, "Port Login succeeded\n");
3410 if (tgt->ids.port_name &&
3411 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3413 tgt_dbg(tgt, "Port re-init required\n");
3416 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3417 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3418 tgt->ids.port_id = tgt->scsi_id;
3419 memcpy(&tgt->service_parms, &rsp->service_parms,
3420 sizeof(tgt->service_parms));
3421 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3422 sizeof(tgt->service_parms_change));
3423 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3425 case IBMVFC_MAD_DRIVER_FAILED:
3427 case IBMVFC_MAD_CRQ_ERROR:
3428 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3430 case IBMVFC_MAD_FAILED:
3432 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3433 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3435 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3437 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3438 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3439 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
3440 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
3441 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status);
3445 kref_put(&tgt->kref, ibmvfc_release_tgt);
3446 ibmvfc_free_event(evt);
3447 wake_up(&vhost->work_wait_q);
3451 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3452 * @tgt: ibmvfc target struct
3455 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3457 struct ibmvfc_port_login *plogi;
3458 struct ibmvfc_host *vhost = tgt->vhost;
3459 struct ibmvfc_event *evt;
3461 if (vhost->discovery_threads >= disc_threads)
3464 kref_get(&tgt->kref);
3466 evt = ibmvfc_get_event(vhost);
3467 vhost->discovery_threads++;
3468 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3469 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3471 plogi = &evt->iu.plogi;
3472 memset(plogi, 0, sizeof(*plogi));
3473 plogi->common.version = cpu_to_be32(1);
3474 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3475 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3476 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
3478 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3479 vhost->discovery_threads--;
3480 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3481 kref_put(&tgt->kref, ibmvfc_release_tgt);
3483 tgt_dbg(tgt, "Sent port login\n");
3487 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3488 * @evt: ibmvfc event struct
3491 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3493 struct ibmvfc_target *tgt = evt->tgt;
3494 struct ibmvfc_host *vhost = evt->vhost;
3495 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3496 u32 status = be16_to_cpu(rsp->common.status);
3498 vhost->discovery_threads--;
3499 ibmvfc_free_event(evt);
3500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3503 case IBMVFC_MAD_SUCCESS:
3504 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3506 case IBMVFC_MAD_DRIVER_FAILED:
3507 kref_put(&tgt->kref, ibmvfc_release_tgt);
3508 wake_up(&vhost->work_wait_q);
3510 case IBMVFC_MAD_FAILED:
3512 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3516 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3517 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3518 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3519 tgt->scsi_id != tgt->new_scsi_id)
3520 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3521 kref_put(&tgt->kref, ibmvfc_release_tgt);
3522 wake_up(&vhost->work_wait_q);
3526 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3527 * @tgt: ibmvfc target struct
3530 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3532 struct ibmvfc_implicit_logout *mad;
3533 struct ibmvfc_host *vhost = tgt->vhost;
3534 struct ibmvfc_event *evt;
3536 if (vhost->discovery_threads >= disc_threads)
3539 kref_get(&tgt->kref);
3540 evt = ibmvfc_get_event(vhost);
3541 vhost->discovery_threads++;
3542 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3544 mad = &evt->iu.implicit_logout;
3545 memset(mad, 0, sizeof(*mad));
3546 mad->common.version = cpu_to_be32(1);
3547 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3548 mad->common.length = cpu_to_be16(sizeof(*mad));
3549 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
3551 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3552 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3553 vhost->discovery_threads--;
3554 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3555 kref_put(&tgt->kref, ibmvfc_release_tgt);
3557 tgt_dbg(tgt, "Sent Implicit Logout\n");
3561 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3562 * @mad: ibmvfc passthru mad struct
3563 * @tgt: ibmvfc target struct
3566 * 1 if PLOGI needed / 0 if PLOGI not needed
3568 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3569 struct ibmvfc_target *tgt)
3571 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
3573 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
3575 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
3581 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3582 * @evt: ibmvfc event struct
3585 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3587 struct ibmvfc_target *tgt = evt->tgt;
3588 struct ibmvfc_host *vhost = evt->vhost;
3589 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3590 u32 status = be16_to_cpu(mad->common.status);
3591 u8 fc_reason, fc_explain;
3593 vhost->discovery_threads--;
3594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3595 del_timer(&tgt->timer);
3598 case IBMVFC_MAD_SUCCESS:
3599 tgt_dbg(tgt, "ADISC succeeded\n");
3600 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3601 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3603 case IBMVFC_MAD_DRIVER_FAILED:
3605 case IBMVFC_MAD_FAILED:
3607 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3608 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3609 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
3610 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3611 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
3612 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error),
3613 ibmvfc_get_fc_type(fc_reason), fc_reason,
3614 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3618 kref_put(&tgt->kref, ibmvfc_release_tgt);
3619 ibmvfc_free_event(evt);
3620 wake_up(&vhost->work_wait_q);
3624 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3625 * @evt: ibmvfc event struct
3628 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3630 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3632 memset(mad, 0, sizeof(*mad));
3633 mad->common.version = cpu_to_be32(1);
3634 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3635 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3636 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3637 offsetof(struct ibmvfc_passthru_mad, iu));
3638 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3639 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3640 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3641 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3642 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3643 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3644 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3645 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3646 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3647 offsetof(struct ibmvfc_passthru_fc_iu, response));
3648 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
3652 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3653 * @evt: ibmvfc event struct
3655 * Just cleanup this event struct. Everything else is handled by
3656 * the ADISC completion handler. If the ADISC never actually comes
3657 * back, we still have the timer running on the ADISC event struct
3658 * which will fire and cause the CRQ to get reset.
3661 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3663 struct ibmvfc_host *vhost = evt->vhost;
3664 struct ibmvfc_target *tgt = evt->tgt;
3666 tgt_dbg(tgt, "ADISC cancel complete\n");
3667 vhost->abort_threads--;
3668 ibmvfc_free_event(evt);
3669 kref_put(&tgt->kref, ibmvfc_release_tgt);
3670 wake_up(&vhost->work_wait_q);
3674 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3675 * @tgt: ibmvfc target struct
3677 * If an ADISC times out, send a cancel. If the cancel times
3678 * out, reset the CRQ. When the ADISC comes back as cancelled,
3679 * log back into the target.
3681 static void ibmvfc_adisc_timeout(struct timer_list *t)
3683 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
3684 struct ibmvfc_host *vhost = tgt->vhost;
3685 struct ibmvfc_event *evt;
3686 struct ibmvfc_tmf *tmf;
3687 unsigned long flags;
3690 tgt_dbg(tgt, "ADISC timeout\n");
3691 spin_lock_irqsave(vhost->host->host_lock, flags);
3692 if (vhost->abort_threads >= disc_threads ||
3693 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3694 vhost->state != IBMVFC_INITIALIZING ||
3695 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3696 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3700 vhost->abort_threads++;
3701 kref_get(&tgt->kref);
3702 evt = ibmvfc_get_event(vhost);
3703 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3707 memset(tmf, 0, sizeof(*tmf));
3708 tmf->common.version = cpu_to_be32(1);
3709 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3710 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3711 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3712 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
3714 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3717 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3718 vhost->abort_threads--;
3719 kref_put(&tgt->kref, ibmvfc_release_tgt);
3720 __ibmvfc_reset_host(vhost);
3722 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3727 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3728 * @tgt: ibmvfc target struct
3730 * When sending an ADISC we end up with two timers running. The
3731 * first timer is the timer in the ibmvfc target struct. If this
3732 * fires, we send a cancel to the target. The second timer is the
3733 * timer on the ibmvfc event for the ADISC, which is longer. If that
3734 * fires, it means the ADISC timed out and our attempt to cancel it
3735 * also failed, so we need to reset the CRQ.
3737 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3739 struct ibmvfc_passthru_mad *mad;
3740 struct ibmvfc_host *vhost = tgt->vhost;
3741 struct ibmvfc_event *evt;
3743 if (vhost->discovery_threads >= disc_threads)
3746 kref_get(&tgt->kref);
3747 evt = ibmvfc_get_event(vhost);
3748 vhost->discovery_threads++;
3749 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3752 ibmvfc_init_passthru(evt);
3753 mad = &evt->iu.passthru;
3754 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3755 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3756 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
3758 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
3759 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3760 sizeof(vhost->login_buf->resp.port_name));
3761 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3762 sizeof(vhost->login_buf->resp.node_name));
3763 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
3765 if (timer_pending(&tgt->timer))
3766 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3768 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3769 add_timer(&tgt->timer);
3772 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3773 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3774 vhost->discovery_threads--;
3775 del_timer(&tgt->timer);
3776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3777 kref_put(&tgt->kref, ibmvfc_release_tgt);
3779 tgt_dbg(tgt, "Sent ADISC\n");
3783 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3784 * @evt: ibmvfc event struct
3787 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3789 struct ibmvfc_target *tgt = evt->tgt;
3790 struct ibmvfc_host *vhost = evt->vhost;
3791 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3792 u32 status = be16_to_cpu(rsp->common.status);
3793 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3795 vhost->discovery_threads--;
3796 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3798 case IBMVFC_MAD_SUCCESS:
3799 tgt_dbg(tgt, "Query Target succeeded\n");
3800 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3801 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
3802 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3804 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3806 case IBMVFC_MAD_DRIVER_FAILED:
3808 case IBMVFC_MAD_CRQ_ERROR:
3809 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3811 case IBMVFC_MAD_FAILED:
3813 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3814 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3815 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
3816 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3817 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3818 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3820 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3822 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3823 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3824 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
3825 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
3826 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain),
3831 kref_put(&tgt->kref, ibmvfc_release_tgt);
3832 ibmvfc_free_event(evt);
3833 wake_up(&vhost->work_wait_q);
3837 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3838 * @tgt: ibmvfc target struct
3841 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3843 struct ibmvfc_query_tgt *query_tgt;
3844 struct ibmvfc_host *vhost = tgt->vhost;
3845 struct ibmvfc_event *evt;
3847 if (vhost->discovery_threads >= disc_threads)
3850 kref_get(&tgt->kref);
3851 evt = ibmvfc_get_event(vhost);
3852 vhost->discovery_threads++;
3854 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3855 query_tgt = &evt->iu.query_tgt;
3856 memset(query_tgt, 0, sizeof(*query_tgt));
3857 query_tgt->common.version = cpu_to_be32(1);
3858 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3859 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3860 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
3862 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3863 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3864 vhost->discovery_threads--;
3865 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3866 kref_put(&tgt->kref, ibmvfc_release_tgt);
3868 tgt_dbg(tgt, "Sent Query Target\n");
3872 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3873 * @vhost: ibmvfc host struct
3874 * @scsi_id: SCSI ID to allocate target for
3877 * 0 on success / other on failure
3879 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3881 struct ibmvfc_target *tgt;
3882 unsigned long flags;
3884 spin_lock_irqsave(vhost->host->host_lock, flags);
3885 list_for_each_entry(tgt, &vhost->targets, queue) {
3886 if (tgt->scsi_id == scsi_id) {
3887 if (tgt->need_login)
3888 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3892 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3894 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3895 memset(tgt, 0, sizeof(*tgt));
3896 tgt->scsi_id = scsi_id;
3897 tgt->new_scsi_id = scsi_id;
3899 tgt->need_login = 1;
3900 tgt->cancel_key = vhost->task_set++;
3901 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
3902 kref_init(&tgt->kref);
3903 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3904 spin_lock_irqsave(vhost->host->host_lock, flags);
3905 list_add_tail(&tgt->queue, &vhost->targets);
3908 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3913 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3914 * @vhost: ibmvfc host struct
3917 * 0 on success / other on failure
3919 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3923 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3924 rc = ibmvfc_alloc_target(vhost,
3925 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3926 IBMVFC_DISC_TGT_SCSI_ID_MASK);
3932 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3933 * @evt: ibmvfc event struct
3936 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3938 struct ibmvfc_host *vhost = evt->vhost;
3939 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3940 u32 mad_status = be16_to_cpu(rsp->common.status);
3941 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3943 switch (mad_status) {
3944 case IBMVFC_MAD_SUCCESS:
3945 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3946 vhost->num_targets = be32_to_cpu(rsp->num_written);
3947 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3949 case IBMVFC_MAD_FAILED:
3950 level += ibmvfc_retry_host_init(vhost);
3951 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3952 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3953 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
3955 case IBMVFC_MAD_DRIVER_FAILED:
3958 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3959 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3963 ibmvfc_free_event(evt);
3964 wake_up(&vhost->work_wait_q);
3968 * ibmvfc_discover_targets - Send Discover Targets MAD
3969 * @vhost: ibmvfc host struct
3972 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3974 struct ibmvfc_discover_targets *mad;
3975 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3977 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3978 mad = &evt->iu.discover_targets;
3979 memset(mad, 0, sizeof(*mad));
3980 mad->common.version = cpu_to_be32(1);
3981 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
3982 mad->common.length = cpu_to_be16(sizeof(*mad));
3983 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
3984 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
3985 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
3986 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3988 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3989 ibmvfc_dbg(vhost, "Sent discover targets\n");
3991 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3995 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3996 * @evt: ibmvfc event struct
3999 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4001 struct ibmvfc_host *vhost = evt->vhost;
4002 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
4003 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4004 unsigned int npiv_max_sectors;
4005 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4007 switch (mad_status) {
4008 case IBMVFC_MAD_SUCCESS:
4009 ibmvfc_free_event(evt);
4011 case IBMVFC_MAD_FAILED:
4012 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4013 level += ibmvfc_retry_host_init(vhost);
4015 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4016 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
4017 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4018 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
4019 ibmvfc_free_event(evt);
4021 case IBMVFC_MAD_CRQ_ERROR:
4022 ibmvfc_retry_host_init(vhost);
4023 case IBMVFC_MAD_DRIVER_FAILED:
4024 ibmvfc_free_event(evt);
4027 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4028 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4029 ibmvfc_free_event(evt);
4033 vhost->client_migrated = 0;
4035 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
4036 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4038 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4039 wake_up(&vhost->work_wait_q);
4043 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
4044 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4046 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4047 wake_up(&vhost->work_wait_q);
4051 vhost->logged_in = 1;
4052 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
4053 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4054 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4055 rsp->drc_name, npiv_max_sectors);
4057 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4058 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4059 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4060 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
4061 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4062 fc_host_supported_classes(vhost->host) = 0;
4063 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
4064 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
4065 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
4066 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
4067 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
4068 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4069 fc_host_maxframe_size(vhost->host) =
4070 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
4072 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
4073 vhost->host->max_sectors = npiv_max_sectors;
4074 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4075 wake_up(&vhost->work_wait_q);
4079 * ibmvfc_npiv_login - Sends NPIV login
4080 * @vhost: ibmvfc host struct
4083 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4085 struct ibmvfc_npiv_login_mad *mad;
4086 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4088 ibmvfc_gather_partition_info(vhost);
4089 ibmvfc_set_login_info(vhost);
4090 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4092 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4093 mad = &evt->iu.npiv_login;
4094 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
4095 mad->common.version = cpu_to_be32(1);
4096 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4097 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4098 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4099 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
4101 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4103 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4104 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4106 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4110 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4111 * @vhost: ibmvfc host struct
4114 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4116 struct ibmvfc_host *vhost = evt->vhost;
4117 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
4119 ibmvfc_free_event(evt);
4121 switch (mad_status) {
4122 case IBMVFC_MAD_SUCCESS:
4123 if (list_empty(&vhost->sent) &&
4124 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
4125 ibmvfc_init_host(vhost);
4129 case IBMVFC_MAD_FAILED:
4130 case IBMVFC_MAD_NOT_SUPPORTED:
4131 case IBMVFC_MAD_CRQ_ERROR:
4132 case IBMVFC_MAD_DRIVER_FAILED:
4134 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4138 ibmvfc_hard_reset_host(vhost);
4142 * ibmvfc_npiv_logout - Issue an NPIV Logout
4143 * @vhost: ibmvfc host struct
4146 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4148 struct ibmvfc_npiv_logout_mad *mad;
4149 struct ibmvfc_event *evt;
4151 evt = ibmvfc_get_event(vhost);
4152 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4154 mad = &evt->iu.npiv_logout;
4155 memset(mad, 0, sizeof(*mad));
4156 mad->common.version = cpu_to_be32(1);
4157 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4158 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
4160 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4162 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4163 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4165 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4169 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4170 * @vhost: ibmvfc host struct
4173 * 1 if work to do / 0 if not
4175 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4177 struct ibmvfc_target *tgt;
4179 list_for_each_entry(tgt, &vhost->targets, queue) {
4180 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4181 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4189 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4190 * @vhost: ibmvfc host struct
4193 * 1 if work to do / 0 if not
4195 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4197 struct ibmvfc_target *tgt;
4199 if (kthread_should_stop())
4201 switch (vhost->action) {
4202 case IBMVFC_HOST_ACTION_NONE:
4203 case IBMVFC_HOST_ACTION_INIT_WAIT:
4204 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4206 case IBMVFC_HOST_ACTION_TGT_INIT:
4207 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4208 if (vhost->discovery_threads == disc_threads)
4210 list_for_each_entry(tgt, &vhost->targets, queue)
4211 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4213 list_for_each_entry(tgt, &vhost->targets, queue)
4214 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4217 case IBMVFC_HOST_ACTION_LOGO:
4218 case IBMVFC_HOST_ACTION_INIT:
4219 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4220 case IBMVFC_HOST_ACTION_TGT_DEL:
4221 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4222 case IBMVFC_HOST_ACTION_QUERY:
4223 case IBMVFC_HOST_ACTION_RESET:
4224 case IBMVFC_HOST_ACTION_REENABLE:
4233 * ibmvfc_work_to_do - Is there task level work to do?
4234 * @vhost: ibmvfc host struct
4237 * 1 if work to do / 0 if not
4239 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4241 unsigned long flags;
4244 spin_lock_irqsave(vhost->host->host_lock, flags);
4245 rc = __ibmvfc_work_to_do(vhost);
4246 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4251 * ibmvfc_log_ae - Log async events if necessary
4252 * @vhost: ibmvfc host struct
4253 * @events: events to log
4256 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4258 if (events & IBMVFC_AE_RSCN)
4259 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4260 if ((events & IBMVFC_AE_LINKDOWN) &&
4261 vhost->state >= IBMVFC_HALTED)
4262 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4263 if ((events & IBMVFC_AE_LINKUP) &&
4264 vhost->state == IBMVFC_INITIALIZING)
4265 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4269 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4270 * @tgt: ibmvfc target struct
4273 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4275 struct ibmvfc_host *vhost = tgt->vhost;
4276 struct fc_rport *rport;
4277 unsigned long flags;
4279 tgt_dbg(tgt, "Adding rport\n");
4280 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4281 spin_lock_irqsave(vhost->host->host_lock, flags);
4283 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4284 tgt_dbg(tgt, "Deleting rport\n");
4285 list_del(&tgt->queue);
4286 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4287 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4288 fc_remote_port_delete(rport);
4289 del_timer_sync(&tgt->timer);
4290 kref_put(&tgt->kref, ibmvfc_release_tgt);
4292 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4293 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4298 tgt_dbg(tgt, "rport add succeeded\n");
4300 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
4301 rport->supported_classes = 0;
4302 tgt->target_id = rport->scsi_target_id;
4303 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
4304 rport->supported_classes |= FC_COS_CLASS1;
4305 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
4306 rport->supported_classes |= FC_COS_CLASS2;
4307 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
4308 rport->supported_classes |= FC_COS_CLASS3;
4310 blk_queue_max_segments(rport->rqst_q, 1);
4312 tgt_dbg(tgt, "rport add failed\n");
4313 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4317 * ibmvfc_do_work - Do task level work
4318 * @vhost: ibmvfc host struct
4321 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4323 struct ibmvfc_target *tgt;
4324 unsigned long flags;
4325 struct fc_rport *rport;
4328 ibmvfc_log_ae(vhost, vhost->events_to_log);
4329 spin_lock_irqsave(vhost->host->host_lock, flags);
4330 vhost->events_to_log = 0;
4331 switch (vhost->action) {
4332 case IBMVFC_HOST_ACTION_NONE:
4333 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4334 case IBMVFC_HOST_ACTION_INIT_WAIT:
4336 case IBMVFC_HOST_ACTION_RESET:
4337 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4338 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4339 rc = ibmvfc_reset_crq(vhost);
4340 spin_lock_irqsave(vhost->host->host_lock, flags);
4342 vio_enable_interrupts(to_vio_dev(vhost->dev));
4343 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4344 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
4345 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4346 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4349 case IBMVFC_HOST_ACTION_REENABLE:
4350 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4351 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4352 rc = ibmvfc_reenable_crq_queue(vhost);
4353 spin_lock_irqsave(vhost->host->host_lock, flags);
4354 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4355 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4356 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4359 case IBMVFC_HOST_ACTION_LOGO:
4360 vhost->job_step(vhost);
4362 case IBMVFC_HOST_ACTION_INIT:
4363 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
4364 if (vhost->delay_init) {
4365 vhost->delay_init = 0;
4366 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4370 vhost->job_step(vhost);
4372 case IBMVFC_HOST_ACTION_QUERY:
4373 list_for_each_entry(tgt, &vhost->targets, queue)
4374 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4375 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4377 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4378 list_for_each_entry(tgt, &vhost->targets, queue) {
4379 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4385 if (!ibmvfc_dev_init_to_do(vhost))
4386 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4388 case IBMVFC_HOST_ACTION_TGT_DEL:
4389 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4390 list_for_each_entry(tgt, &vhost->targets, queue) {
4391 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4392 tgt_dbg(tgt, "Deleting rport\n");
4395 list_del(&tgt->queue);
4396 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4397 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4399 fc_remote_port_delete(rport);
4400 del_timer_sync(&tgt->timer);
4401 kref_put(&tgt->kref, ibmvfc_release_tgt);
4406 if (vhost->state == IBMVFC_INITIALIZING) {
4407 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
4408 if (vhost->reinit) {
4410 scsi_block_requests(vhost->host);
4411 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4412 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4414 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4415 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4416 wake_up(&vhost->init_wait_q);
4417 schedule_work(&vhost->rport_add_work_q);
4418 vhost->init_retries = 0;
4419 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4420 scsi_unblock_requests(vhost->host);
4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4426 vhost->job_step = ibmvfc_discover_targets;
4429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4430 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4431 scsi_unblock_requests(vhost->host);
4432 wake_up(&vhost->init_wait_q);
4436 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4437 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4438 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4439 ibmvfc_alloc_targets(vhost);
4440 spin_lock_irqsave(vhost->host->host_lock, flags);
4442 case IBMVFC_HOST_ACTION_TGT_INIT:
4443 list_for_each_entry(tgt, &vhost->targets, queue) {
4444 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4450 if (!ibmvfc_dev_init_to_do(vhost))
4451 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4457 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4461 * ibmvfc_work - Do task level work
4462 * @data: ibmvfc host struct
4467 static int ibmvfc_work(void *data)
4469 struct ibmvfc_host *vhost = data;
4472 set_user_nice(current, MIN_NICE);
4475 rc = wait_event_interruptible(vhost->work_wait_q,
4476 ibmvfc_work_to_do(vhost));
4480 if (kthread_should_stop())
4483 ibmvfc_do_work(vhost);
4486 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4491 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4492 * @vhost: ibmvfc host struct
4494 * Allocates a page for messages, maps it for dma, and registers
4495 * the crq with the hypervisor.
4498 * zero on success / other on failure
4500 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4502 int rc, retrc = -ENOMEM;
4503 struct device *dev = vhost->dev;
4504 struct vio_dev *vdev = to_vio_dev(dev);
4505 struct ibmvfc_crq_queue *crq = &vhost->crq;
4508 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4513 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4514 crq->msg_token = dma_map_single(dev, crq->msgs,
4515 PAGE_SIZE, DMA_BIDIRECTIONAL);
4517 if (dma_mapping_error(dev, crq->msg_token))
4520 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4521 crq->msg_token, PAGE_SIZE);
4523 if (rc == H_RESOURCE)
4524 /* maybe kexecing and resource is busy. try a reset */
4525 retrc = rc = ibmvfc_reset_crq(vhost);
4528 dev_warn(dev, "Partner adapter not ready\n");
4530 dev_warn(dev, "Error %d opening adapter\n", rc);
4531 goto reg_crq_failed;
4536 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4538 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4539 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4540 goto req_irq_failed;
4543 if ((rc = vio_enable_interrupts(vdev))) {
4544 dev_err(dev, "Error %d enabling interrupts\n", rc);
4545 goto req_irq_failed;
4553 tasklet_kill(&vhost->tasklet);
4555 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4556 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4558 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4560 free_page((unsigned long)crq->msgs);
4565 * ibmvfc_free_mem - Free memory for vhost
4566 * @vhost: ibmvfc host struct
4571 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4573 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4576 mempool_destroy(vhost->tgt_pool);
4577 kfree(vhost->trace);
4578 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4579 vhost->disc_buf_dma);
4580 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4581 vhost->login_buf, vhost->login_buf_dma);
4582 dma_pool_destroy(vhost->sg_pool);
4583 dma_unmap_single(vhost->dev, async_q->msg_token,
4584 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4585 free_page((unsigned long)async_q->msgs);
4590 * ibmvfc_alloc_mem - Allocate memory for vhost
4591 * @vhost: ibmvfc host struct
4594 * 0 on success / non-zero on failure
4596 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4598 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4599 struct device *dev = vhost->dev;
4602 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4603 if (!async_q->msgs) {
4604 dev_err(dev, "Couldn't allocate async queue.\n");
4608 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4609 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4610 async_q->size * sizeof(*async_q->msgs),
4613 if (dma_mapping_error(dev, async_q->msg_token)) {
4614 dev_err(dev, "Failed to map async queue\n");
4615 goto free_async_crq;
4618 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4619 SG_ALL * sizeof(struct srp_direct_buf),
4620 sizeof(struct srp_direct_buf), 0);
4622 if (!vhost->sg_pool) {
4623 dev_err(dev, "Failed to allocate sg pool\n");
4624 goto unmap_async_crq;
4627 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4628 &vhost->login_buf_dma, GFP_KERNEL);
4630 if (!vhost->login_buf) {
4631 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4635 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4636 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4637 &vhost->disc_buf_dma, GFP_KERNEL);
4639 if (!vhost->disc_buf) {
4640 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4641 goto free_login_buffer;
4644 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4645 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4648 goto free_disc_buffer;
4650 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4651 sizeof(struct ibmvfc_target));
4653 if (!vhost->tgt_pool) {
4654 dev_err(dev, "Couldn't allocate target memory pool\n");
4662 kfree(vhost->trace);
4664 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4665 vhost->disc_buf_dma);
4667 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4668 vhost->login_buf, vhost->login_buf_dma);
4670 dma_pool_destroy(vhost->sg_pool);
4672 dma_unmap_single(dev, async_q->msg_token,
4673 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4675 free_page((unsigned long)async_q->msgs);
4682 * ibmvfc_rport_add_thread - Worker thread for rport adds
4683 * @work: work struct
4686 static void ibmvfc_rport_add_thread(struct work_struct *work)
4688 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4690 struct ibmvfc_target *tgt;
4691 struct fc_rport *rport;
4692 unsigned long flags;
4696 spin_lock_irqsave(vhost->host->host_lock, flags);
4699 if (vhost->state != IBMVFC_ACTIVE)
4702 list_for_each_entry(tgt, &vhost->targets, queue) {
4703 if (tgt->add_rport) {
4706 kref_get(&tgt->kref);
4709 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4710 ibmvfc_tgt_add_rport(tgt);
4711 } else if (get_device(&rport->dev)) {
4712 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4713 tgt_dbg(tgt, "Setting rport roles\n");
4714 fc_remote_port_rolechg(rport, tgt->ids.roles);
4715 put_device(&rport->dev);
4717 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4720 kref_put(&tgt->kref, ibmvfc_release_tgt);
4721 spin_lock_irqsave(vhost->host->host_lock, flags);
4727 if (vhost->state == IBMVFC_ACTIVE)
4728 vhost->scan_complete = 1;
4729 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4734 * ibmvfc_probe - Adapter hot plug add entry point
4735 * @vdev: vio device struct
4736 * @id: vio device id struct
4739 * 0 on success / non-zero on failure
4741 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4743 struct ibmvfc_host *vhost;
4744 struct Scsi_Host *shost;
4745 struct device *dev = &vdev->dev;
4749 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4751 dev_err(dev, "Couldn't allocate host data\n");
4755 shost->transportt = ibmvfc_transport_template;
4756 shost->can_queue = max_requests;
4757 shost->max_lun = max_lun;
4758 shost->max_id = max_targets;
4759 shost->max_sectors = IBMVFC_MAX_SECTORS;
4760 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4761 shost->unique_id = shost->host_no;
4763 vhost = shost_priv(shost);
4764 INIT_LIST_HEAD(&vhost->sent);
4765 INIT_LIST_HEAD(&vhost->free);
4766 INIT_LIST_HEAD(&vhost->targets);
4767 sprintf(vhost->name, IBMVFC_NAME);
4768 vhost->host = shost;
4770 vhost->partition_number = -1;
4771 vhost->log_level = log_level;
4772 vhost->task_set = 1;
4773 strcpy(vhost->partition_name, "UNKNOWN");
4774 init_waitqueue_head(&vhost->work_wait_q);
4775 init_waitqueue_head(&vhost->init_wait_q);
4776 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4777 mutex_init(&vhost->passthru_mutex);
4779 if ((rc = ibmvfc_alloc_mem(vhost)))
4780 goto free_scsi_host;
4782 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4785 if (IS_ERR(vhost->work_thread)) {
4786 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4787 PTR_ERR(vhost->work_thread));
4791 if ((rc = ibmvfc_init_crq(vhost))) {
4792 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4796 if ((rc = ibmvfc_init_event_pool(vhost))) {
4797 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4801 if ((rc = scsi_add_host(shost, dev)))
4802 goto release_event_pool;
4804 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4806 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4807 &ibmvfc_trace_attr))) {
4808 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4812 if (shost_to_fc_host(shost)->rqst_q)
4813 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
4814 dev_set_drvdata(dev, vhost);
4815 spin_lock(&ibmvfc_driver_lock);
4816 list_add_tail(&vhost->queue, &ibmvfc_head);
4817 spin_unlock(&ibmvfc_driver_lock);
4819 ibmvfc_send_crq_init(vhost);
4820 scsi_scan_host(shost);
4824 scsi_remove_host(shost);
4826 ibmvfc_free_event_pool(vhost);
4828 ibmvfc_release_crq_queue(vhost);
4830 kthread_stop(vhost->work_thread);
4832 ibmvfc_free_mem(vhost);
4834 scsi_host_put(shost);
4841 * ibmvfc_remove - Adapter hot plug remove entry point
4842 * @vdev: vio device struct
4847 static int ibmvfc_remove(struct vio_dev *vdev)
4849 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4850 unsigned long flags;
4853 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4855 spin_lock_irqsave(vhost->host->host_lock, flags);
4856 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4857 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4859 ibmvfc_wait_while_resetting(vhost);
4860 ibmvfc_release_crq_queue(vhost);
4861 kthread_stop(vhost->work_thread);
4862 fc_remove_host(vhost->host);
4863 scsi_remove_host(vhost->host);
4865 spin_lock_irqsave(vhost->host->host_lock, flags);
4866 ibmvfc_purge_requests(vhost, DID_ERROR);
4867 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4868 ibmvfc_free_event_pool(vhost);
4870 ibmvfc_free_mem(vhost);
4871 spin_lock(&ibmvfc_driver_lock);
4872 list_del(&vhost->queue);
4873 spin_unlock(&ibmvfc_driver_lock);
4874 scsi_host_put(vhost->host);
4880 * ibmvfc_resume - Resume from suspend
4881 * @dev: device struct
4883 * We may have lost an interrupt across suspend/resume, so kick the
4887 static int ibmvfc_resume(struct device *dev)
4889 unsigned long flags;
4890 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4891 struct vio_dev *vdev = to_vio_dev(dev);
4893 spin_lock_irqsave(vhost->host->host_lock, flags);
4894 vio_disable_interrupts(vdev);
4895 tasklet_schedule(&vhost->tasklet);
4896 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4901 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4902 * @vdev: vio device struct
4905 * Number of bytes the driver will need to DMA map at the same time in
4906 * order to perform well.
4908 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4910 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4911 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4914 static const struct vio_device_id ibmvfc_device_table[] = {
4915 {"fcp", "IBM,vfc-client"},
4918 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4920 static const struct dev_pm_ops ibmvfc_pm_ops = {
4921 .resume = ibmvfc_resume
4924 static struct vio_driver ibmvfc_driver = {
4925 .id_table = ibmvfc_device_table,
4926 .probe = ibmvfc_probe,
4927 .remove = ibmvfc_remove,
4928 .get_desired_dma = ibmvfc_get_desired_dma,
4929 .name = IBMVFC_NAME,
4930 .pm = &ibmvfc_pm_ops,
4933 static struct fc_function_template ibmvfc_transport_functions = {
4934 .show_host_fabric_name = 1,
4935 .show_host_node_name = 1,
4936 .show_host_port_name = 1,
4937 .show_host_supported_classes = 1,
4938 .show_host_port_type = 1,
4939 .show_host_port_id = 1,
4940 .show_host_maxframe_size = 1,
4942 .get_host_port_state = ibmvfc_get_host_port_state,
4943 .show_host_port_state = 1,
4945 .get_host_speed = ibmvfc_get_host_speed,
4946 .show_host_speed = 1,
4948 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4949 .terminate_rport_io = ibmvfc_terminate_rport_io,
4951 .show_rport_maxframe_size = 1,
4952 .show_rport_supported_classes = 1,
4954 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4955 .show_rport_dev_loss_tmo = 1,
4957 .get_starget_node_name = ibmvfc_get_starget_node_name,
4958 .show_starget_node_name = 1,
4960 .get_starget_port_name = ibmvfc_get_starget_port_name,
4961 .show_starget_port_name = 1,
4963 .get_starget_port_id = ibmvfc_get_starget_port_id,
4964 .show_starget_port_id = 1,
4966 .bsg_request = ibmvfc_bsg_request,
4967 .bsg_timeout = ibmvfc_bsg_timeout,
4971 * ibmvfc_module_init - Initialize the ibmvfc module
4974 * 0 on success / other on failure
4976 static int __init ibmvfc_module_init(void)
4980 if (!firmware_has_feature(FW_FEATURE_VIO))
4983 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4984 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4986 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4987 if (!ibmvfc_transport_template)
4990 rc = vio_register_driver(&ibmvfc_driver);
4992 fc_release_transport(ibmvfc_transport_template);
4997 * ibmvfc_module_exit - Teardown the ibmvfc module
5002 static void __exit ibmvfc_module_exit(void)
5004 vio_unregister_driver(&ibmvfc_driver);
5005 fc_release_transport(ibmvfc_transport_template);
5008 module_init(ibmvfc_module_init);
5009 module_exit(ibmvfc_module_exit);