2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 * Copyright (C) IBM Corporation, 2008
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
34 #include <linux/stringify.h>
35 #include <asm/firmware.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_tcq.h>
43 #include <scsi/scsi_transport_fc.h>
44 #include <scsi/scsi_bsg_fc.h>
47 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
48 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
49 static u64 max_lun = IBMVFC_MAX_LUN;
50 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
51 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
52 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
53 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
54 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
55 static LIST_HEAD(ibmvfc_head);
56 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
57 static struct scsi_transport_template *ibmvfc_transport_template;
59 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
60 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
61 MODULE_LICENSE("GPL");
62 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
64 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
65 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
66 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
67 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
68 MODULE_PARM_DESC(default_timeout,
69 "Default timeout in seconds for initialization and EH commands. "
70 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
71 module_param_named(max_requests, max_requests, uint, S_IRUGO);
72 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
73 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
74 module_param_named(max_lun, max_lun, ullong, S_IRUGO);
75 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
76 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
77 module_param_named(max_targets, max_targets, uint, S_IRUGO);
78 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
79 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
80 module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
81 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
82 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
83 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
84 MODULE_PARM_DESC(debug, "Enable driver debug information. "
85 "[Default=" __stringify(IBMVFC_DEBUG) "]");
86 module_param_named(log_level, log_level, uint, 0);
87 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
88 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
98 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
99 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
100 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
113 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
114 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
115 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
116 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
118 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
124 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
125 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
126 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
129 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
130 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
131 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
132 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
134 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
136 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
139 static void ibmvfc_npiv_login(struct ibmvfc_host *);
140 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
141 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
142 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
143 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
145 static const char *unknown_error = "unknown error";
147 #ifdef CONFIG_SCSI_IBMVFC_TRACE
149 * ibmvfc_trc_start - Log a start trace entry
150 * @evt: ibmvfc event struct
153 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
155 struct ibmvfc_host *vhost = evt->vhost;
156 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
157 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
158 struct ibmvfc_trace_entry *entry;
160 entry = &vhost->trace[vhost->trace_index++];
162 entry->time = jiffies;
163 entry->fmt = evt->crq.format;
164 entry->type = IBMVFC_TRC_START;
166 switch (entry->fmt) {
167 case IBMVFC_CMD_FORMAT:
168 entry->op_code = vfc_cmd->iu.cdb[0];
169 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
170 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
171 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
172 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
174 case IBMVFC_MAD_FORMAT:
175 entry->op_code = be32_to_cpu(mad->opcode);
183 * ibmvfc_trc_end - Log an end trace entry
184 * @evt: ibmvfc event struct
187 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
189 struct ibmvfc_host *vhost = evt->vhost;
190 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
191 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
192 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
195 entry->time = jiffies;
196 entry->fmt = evt->crq.format;
197 entry->type = IBMVFC_TRC_END;
199 switch (entry->fmt) {
200 case IBMVFC_CMD_FORMAT:
201 entry->op_code = vfc_cmd->iu.cdb[0];
202 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
203 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
204 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
205 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
206 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
207 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
208 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
209 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
211 case IBMVFC_MAD_FORMAT:
212 entry->op_code = be32_to_cpu(mad->opcode);
213 entry->u.end.status = be16_to_cpu(mad->status);
222 #define ibmvfc_trc_start(evt) do { } while (0)
223 #define ibmvfc_trc_end(evt) do { } while (0)
227 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
228 * @status: status / error class
232 * index into cmd_status / -EINVAL on failure
234 static int ibmvfc_get_err_index(u16 status, u16 error)
238 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
239 if ((cmd_status[i].status & status) == cmd_status[i].status &&
240 cmd_status[i].error == error)
247 * ibmvfc_get_cmd_error - Find the error description for the fcp response
248 * @status: status / error class
252 * error description string
254 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
256 int rc = ibmvfc_get_err_index(status, error);
258 return cmd_status[rc].name;
259 return unknown_error;
263 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
264 * @vfc_cmd: ibmvfc command struct
267 * SCSI result value to return for completed command
269 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
272 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
273 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
275 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
276 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
277 rsp->data.info.rsp_code))
278 return DID_ERROR << 16;
280 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
282 return rsp->scsi_status | (cmd_status[err].result << 16);
283 return rsp->scsi_status | (DID_ERROR << 16);
287 * ibmvfc_retry_cmd - Determine if error status is retryable
288 * @status: status / error class
292 * 1 if error should be retried / 0 if it should not
294 static int ibmvfc_retry_cmd(u16 status, u16 error)
296 int rc = ibmvfc_get_err_index(status, error);
299 return cmd_status[rc].retry;
303 static const char *unknown_fc_explain = "unknown fc explain";
305 static const struct {
309 { 0x00, "no additional explanation" },
310 { 0x01, "service parameter error - options" },
311 { 0x03, "service parameter error - initiator control" },
312 { 0x05, "service parameter error - recipient control" },
313 { 0x07, "service parameter error - received data field size" },
314 { 0x09, "service parameter error - concurrent seq" },
315 { 0x0B, "service parameter error - credit" },
316 { 0x0D, "invalid N_Port/F_Port_Name" },
317 { 0x0E, "invalid node/Fabric Name" },
318 { 0x0F, "invalid common service parameters" },
319 { 0x11, "invalid association header" },
320 { 0x13, "association header required" },
321 { 0x15, "invalid originator S_ID" },
322 { 0x17, "invalid OX_ID-RX-ID combination" },
323 { 0x19, "command (request) already in progress" },
324 { 0x1E, "N_Port Login requested" },
325 { 0x1F, "Invalid N_Port_ID" },
328 static const struct {
332 { 0x00, "no additional explanation" },
333 { 0x01, "port identifier not registered" },
334 { 0x02, "port name not registered" },
335 { 0x03, "node name not registered" },
336 { 0x04, "class of service not registered" },
337 { 0x06, "initial process associator not registered" },
338 { 0x07, "FC-4 TYPEs not registered" },
339 { 0x08, "symbolic port name not registered" },
340 { 0x09, "symbolic node name not registered" },
341 { 0x0A, "port type not registered" },
342 { 0xF0, "authorization exception" },
343 { 0xF1, "authentication exception" },
344 { 0xF2, "data base full" },
345 { 0xF3, "data base empty" },
346 { 0xF4, "processing request" },
347 { 0xF5, "unable to verify connection" },
348 { 0xF6, "devices not in a common zone" },
352 * ibmvfc_get_ls_explain - Return the FC Explain description text
353 * @status: FC Explain status
358 static const char *ibmvfc_get_ls_explain(u16 status)
362 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
363 if (ls_explain[i].fc_explain == status)
364 return ls_explain[i].name;
366 return unknown_fc_explain;
370 * ibmvfc_get_gs_explain - Return the FC Explain description text
371 * @status: FC Explain status
376 static const char *ibmvfc_get_gs_explain(u16 status)
380 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
381 if (gs_explain[i].fc_explain == status)
382 return gs_explain[i].name;
384 return unknown_fc_explain;
387 static const struct {
388 enum ibmvfc_fc_type fc_type;
391 { IBMVFC_FABRIC_REJECT, "fabric reject" },
392 { IBMVFC_PORT_REJECT, "port reject" },
393 { IBMVFC_LS_REJECT, "ELS reject" },
394 { IBMVFC_FABRIC_BUSY, "fabric busy" },
395 { IBMVFC_PORT_BUSY, "port busy" },
396 { IBMVFC_BASIC_REJECT, "basic reject" },
399 static const char *unknown_fc_type = "unknown fc type";
402 * ibmvfc_get_fc_type - Return the FC Type description text
403 * @status: FC Type error status
408 static const char *ibmvfc_get_fc_type(u16 status)
412 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
413 if (fc_type[i].fc_type == status)
414 return fc_type[i].name;
416 return unknown_fc_type;
420 * ibmvfc_set_tgt_action - Set the next init action for the target
421 * @tgt: ibmvfc target struct
422 * @action: action to perform
425 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
426 enum ibmvfc_target_action action)
428 switch (tgt->action) {
429 case IBMVFC_TGT_ACTION_DEL_RPORT:
430 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
431 tgt->action = action;
432 case IBMVFC_TGT_ACTION_DELETED_RPORT:
435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
437 tgt->action = action;
443 * ibmvfc_set_host_state - Set the state for the host
444 * @vhost: ibmvfc host struct
445 * @state: state to set host to
448 * 0 if state changed / non-zero if not changed
450 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
451 enum ibmvfc_host_state state)
455 switch (vhost->state) {
456 case IBMVFC_HOST_OFFLINE:
460 vhost->state = state;
468 * ibmvfc_set_host_action - Set the next init action for the host
469 * @vhost: ibmvfc host struct
470 * @action: action to perform
473 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
474 enum ibmvfc_host_action action)
477 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
479 vhost->action = action;
481 case IBMVFC_HOST_ACTION_LOGO_WAIT:
482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
483 vhost->action = action;
485 case IBMVFC_HOST_ACTION_INIT_WAIT:
486 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
487 vhost->action = action;
489 case IBMVFC_HOST_ACTION_QUERY:
490 switch (vhost->action) {
491 case IBMVFC_HOST_ACTION_INIT_WAIT:
492 case IBMVFC_HOST_ACTION_NONE:
493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
494 vhost->action = action;
500 case IBMVFC_HOST_ACTION_TGT_INIT:
501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
502 vhost->action = action;
504 case IBMVFC_HOST_ACTION_INIT:
505 case IBMVFC_HOST_ACTION_TGT_DEL:
506 switch (vhost->action) {
507 case IBMVFC_HOST_ACTION_RESET:
508 case IBMVFC_HOST_ACTION_REENABLE:
511 vhost->action = action;
515 case IBMVFC_HOST_ACTION_LOGO:
516 case IBMVFC_HOST_ACTION_QUERY_TGTS:
517 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
518 case IBMVFC_HOST_ACTION_NONE:
519 case IBMVFC_HOST_ACTION_RESET:
520 case IBMVFC_HOST_ACTION_REENABLE:
522 vhost->action = action;
528 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
529 * @vhost: ibmvfc host struct
534 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
536 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
537 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
538 scsi_block_requests(vhost->host);
539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
544 wake_up(&vhost->work_wait_q);
548 * ibmvfc_link_down - Handle a link down event from the adapter
549 * @vhost: ibmvfc host struct
550 * @state: ibmvfc host state to enter
553 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
554 enum ibmvfc_host_state state)
556 struct ibmvfc_target *tgt;
559 scsi_block_requests(vhost->host);
560 list_for_each_entry(tgt, &vhost->targets, queue)
561 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
562 ibmvfc_set_host_state(vhost, state);
563 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
564 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
565 wake_up(&vhost->work_wait_q);
570 * ibmvfc_init_host - Start host initialization
571 * @vhost: ibmvfc host struct
576 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
578 struct ibmvfc_target *tgt;
580 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
581 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
583 "Host initialization retries exceeded. Taking adapter offline\n");
584 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
589 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
590 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
591 vhost->async_crq.cur = 0;
593 list_for_each_entry(tgt, &vhost->targets, queue)
594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
595 scsi_block_requests(vhost->host);
596 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
597 vhost->job_step = ibmvfc_npiv_login;
598 wake_up(&vhost->work_wait_q);
603 * ibmvfc_send_crq - Send a CRQ
604 * @vhost: ibmvfc host struct
605 * @word1: the first 64 bits of the data
606 * @word2: the second 64 bits of the data
609 * 0 on success / other on failure
611 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
613 struct vio_dev *vdev = to_vio_dev(vhost->dev);
614 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
618 * ibmvfc_send_crq_init - Send a CRQ init message
619 * @vhost: ibmvfc host struct
622 * 0 on success / other on failure
624 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
626 ibmvfc_dbg(vhost, "Sending CRQ init\n");
627 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
631 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
632 * @vhost: ibmvfc host struct
635 * 0 on success / other on failure
637 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
639 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
640 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
644 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
645 * @vhost: ibmvfc host struct
647 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
648 * the crq with the hypervisor.
650 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
653 struct vio_dev *vdev = to_vio_dev(vhost->dev);
654 struct ibmvfc_crq_queue *crq = &vhost->crq;
656 ibmvfc_dbg(vhost, "Releasing CRQ\n");
657 free_irq(vdev->irq, vhost);
658 tasklet_kill(&vhost->tasklet);
662 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
663 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
665 vhost->state = IBMVFC_NO_CRQ;
666 vhost->logged_in = 0;
667 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
668 free_page((unsigned long)crq->msgs);
672 * ibmvfc_reenable_crq_queue - reenables the CRQ
673 * @vhost: ibmvfc host struct
676 * 0 on success / other on failure
678 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
681 struct vio_dev *vdev = to_vio_dev(vhost->dev);
683 /* Re-enable the CRQ */
687 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
688 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
691 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
697 * ibmvfc_reset_crq - resets a crq after a failure
698 * @vhost: ibmvfc host struct
701 * 0 on success / other on failure
703 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
707 struct vio_dev *vdev = to_vio_dev(vhost->dev);
708 struct ibmvfc_crq_queue *crq = &vhost->crq;
714 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
715 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
717 spin_lock_irqsave(vhost->host->host_lock, flags);
718 vhost->state = IBMVFC_NO_CRQ;
719 vhost->logged_in = 0;
721 /* Clean out the queue */
722 memset(crq->msgs, 0, PAGE_SIZE);
725 /* And re-open it again */
726 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
727 crq->msg_token, PAGE_SIZE);
730 /* Adapter is good, but other end is not ready */
731 dev_warn(vhost->dev, "Partner adapter not ready\n");
733 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
734 spin_unlock_irqrestore(vhost->host->host_lock, flags);
740 * ibmvfc_valid_event - Determines if event is valid.
741 * @pool: event_pool that contains the event
742 * @evt: ibmvfc event to be checked for validity
745 * 1 if event is valid / 0 if event is not valid
747 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
748 struct ibmvfc_event *evt)
750 int index = evt - pool->events;
751 if (index < 0 || index >= pool->size) /* outside of bounds */
753 if (evt != pool->events + index) /* unaligned */
759 * ibmvfc_free_event - Free the specified event
760 * @evt: ibmvfc_event to be freed
763 static void ibmvfc_free_event(struct ibmvfc_event *evt)
765 struct ibmvfc_host *vhost = evt->vhost;
766 struct ibmvfc_event_pool *pool = &vhost->pool;
768 BUG_ON(!ibmvfc_valid_event(pool, evt));
769 BUG_ON(atomic_inc_return(&evt->free) != 1);
770 list_add_tail(&evt->queue, &vhost->free);
774 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
775 * @evt: ibmvfc event struct
777 * This function does not setup any error status, that must be done
778 * before this function gets called.
780 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
782 struct scsi_cmnd *cmnd = evt->cmnd;
785 scsi_dma_unmap(cmnd);
786 cmnd->scsi_done(cmnd);
790 complete(evt->eh_comp);
792 ibmvfc_free_event(evt);
796 * ibmvfc_fail_request - Fail request with specified error code
797 * @evt: ibmvfc event struct
798 * @error_code: error code to fail request with
803 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
806 evt->cmnd->result = (error_code << 16);
807 evt->done = ibmvfc_scsi_eh_done;
809 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
811 list_del(&evt->queue);
812 del_timer(&evt->timer);
818 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
819 * @vhost: ibmvfc host struct
820 * @error_code: error code to fail requests with
825 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
827 struct ibmvfc_event *evt, *pos;
829 ibmvfc_dbg(vhost, "Purging all requests\n");
830 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
831 ibmvfc_fail_request(evt, error_code);
835 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
836 * @vhost: struct ibmvfc host to reset
838 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
840 ibmvfc_purge_requests(vhost, DID_ERROR);
841 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
842 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
846 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
847 * @vhost: struct ibmvfc host to reset
849 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
851 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
852 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
853 scsi_block_requests(vhost->host);
854 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
855 vhost->job_step = ibmvfc_npiv_logout;
856 wake_up(&vhost->work_wait_q);
858 ibmvfc_hard_reset_host(vhost);
862 * ibmvfc_reset_host - Reset the connection to the server
863 * @vhost: ibmvfc host struct
865 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
869 spin_lock_irqsave(vhost->host->host_lock, flags);
870 __ibmvfc_reset_host(vhost);
871 spin_unlock_irqrestore(vhost->host->host_lock, flags);
875 * ibmvfc_retry_host_init - Retry host initialization if allowed
876 * @vhost: ibmvfc host struct
878 * Returns: 1 if init will be retried / 0 if not
881 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
885 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
886 vhost->delay_init = 1;
887 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
889 "Host initialization retries exceeded. Taking adapter offline\n");
890 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
891 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
892 __ibmvfc_reset_host(vhost);
894 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
899 wake_up(&vhost->work_wait_q);
904 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
905 * @starget: scsi target struct
908 * ibmvfc_target struct / NULL if not found
910 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
912 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
913 struct ibmvfc_host *vhost = shost_priv(shost);
914 struct ibmvfc_target *tgt;
916 list_for_each_entry(tgt, &vhost->targets, queue)
917 if (tgt->target_id == starget->id) {
918 kref_get(&tgt->kref);
925 * ibmvfc_get_target - Find the specified scsi_target
926 * @starget: scsi target struct
929 * ibmvfc_target struct / NULL if not found
931 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
933 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
934 struct ibmvfc_target *tgt;
937 spin_lock_irqsave(shost->host_lock, flags);
938 tgt = __ibmvfc_get_target(starget);
939 spin_unlock_irqrestore(shost->host_lock, flags);
944 * ibmvfc_get_host_speed - Get host port speed
945 * @shost: scsi host struct
950 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
952 struct ibmvfc_host *vhost = shost_priv(shost);
955 spin_lock_irqsave(shost->host_lock, flags);
956 if (vhost->state == IBMVFC_ACTIVE) {
957 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
959 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
962 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
965 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
968 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
971 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
974 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
977 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
978 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
979 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
983 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
984 spin_unlock_irqrestore(shost->host_lock, flags);
988 * ibmvfc_get_host_port_state - Get host port state
989 * @shost: scsi host struct
994 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
996 struct ibmvfc_host *vhost = shost_priv(shost);
999 spin_lock_irqsave(shost->host_lock, flags);
1000 switch (vhost->state) {
1001 case IBMVFC_INITIALIZING:
1003 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1005 case IBMVFC_LINK_DOWN:
1006 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1008 case IBMVFC_LINK_DEAD:
1009 case IBMVFC_HOST_OFFLINE:
1010 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1013 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1016 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1019 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1020 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1023 spin_unlock_irqrestore(shost->host_lock, flags);
1027 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1028 * @rport: rport struct
1029 * @timeout: timeout value
1034 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1037 rport->dev_loss_tmo = timeout;
1039 rport->dev_loss_tmo = 1;
1043 * ibmvfc_release_tgt - Free memory allocated for a target
1044 * @kref: kref struct
1047 static void ibmvfc_release_tgt(struct kref *kref)
1049 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1054 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1055 * @starget: scsi target struct
1060 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1062 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1063 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1065 kref_put(&tgt->kref, ibmvfc_release_tgt);
1069 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1070 * @starget: scsi target struct
1075 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1077 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1078 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1080 kref_put(&tgt->kref, ibmvfc_release_tgt);
1084 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1085 * @starget: scsi target struct
1090 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1092 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1093 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1095 kref_put(&tgt->kref, ibmvfc_release_tgt);
1099 * ibmvfc_wait_while_resetting - Wait while the host resets
1100 * @vhost: ibmvfc host struct
1103 * 0 on success / other on failure
1105 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1107 long timeout = wait_event_timeout(vhost->init_wait_q,
1108 ((vhost->state == IBMVFC_ACTIVE ||
1109 vhost->state == IBMVFC_HOST_OFFLINE ||
1110 vhost->state == IBMVFC_LINK_DEAD) &&
1111 vhost->action == IBMVFC_HOST_ACTION_NONE),
1112 (init_timeout * HZ));
1114 return timeout ? 0 : -EIO;
1118 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1119 * @shost: scsi host struct
1122 * 0 on success / other on failure
1124 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1126 struct ibmvfc_host *vhost = shost_priv(shost);
1128 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1129 ibmvfc_reset_host(vhost);
1130 return ibmvfc_wait_while_resetting(vhost);
1134 * ibmvfc_gather_partition_info - Gather info about the LPAR
1139 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1141 struct device_node *rootdn;
1143 const unsigned int *num;
1145 rootdn = of_find_node_by_path("/");
1149 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1151 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1152 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1154 vhost->partition_number = *num;
1155 of_node_put(rootdn);
1159 * ibmvfc_set_login_info - Setup info for NPIV login
1160 * @vhost: ibmvfc host struct
1165 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1167 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1168 struct device_node *of_node = vhost->dev->of_node;
1169 const char *location;
1171 memset(login_info, 0, sizeof(*login_info));
1173 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1174 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1175 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1176 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1177 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1178 login_info->vfc_frame_version = cpu_to_be32(1);
1179 login_info->fcp_version = cpu_to_be16(3);
1180 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
1181 if (vhost->client_migrated)
1182 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
1184 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1185 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1186 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1187 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
1188 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1189 strncpy(login_info->device_name,
1190 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1192 location = of_get_property(of_node, "ibm,loc-code", NULL);
1193 location = location ? location : dev_name(vhost->dev);
1194 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1198 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1199 * @vhost: ibmvfc host who owns the event pool
1201 * Returns zero on success.
1203 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1206 struct ibmvfc_event_pool *pool = &vhost->pool;
1209 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1210 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1214 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1215 pool->size * sizeof(*pool->iu_storage),
1216 &pool->iu_token, 0);
1218 if (!pool->iu_storage) {
1219 kfree(pool->events);
1223 for (i = 0; i < pool->size; ++i) {
1224 struct ibmvfc_event *evt = &pool->events[i];
1225 atomic_set(&evt->free, 1);
1226 evt->crq.valid = 0x80;
1227 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
1228 evt->xfer_iu = pool->iu_storage + i;
1230 evt->ext_list = NULL;
1231 list_add_tail(&evt->queue, &vhost->free);
1239 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1240 * @vhost: ibmvfc host who owns the event pool
1243 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1246 struct ibmvfc_event_pool *pool = &vhost->pool;
1249 for (i = 0; i < pool->size; ++i) {
1250 list_del(&pool->events[i].queue);
1251 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1252 if (pool->events[i].ext_list)
1253 dma_pool_free(vhost->sg_pool,
1254 pool->events[i].ext_list,
1255 pool->events[i].ext_list_token);
1258 kfree(pool->events);
1259 dma_free_coherent(vhost->dev,
1260 pool->size * sizeof(*pool->iu_storage),
1261 pool->iu_storage, pool->iu_token);
1266 * ibmvfc_get_event - Gets the next free event in pool
1267 * @vhost: ibmvfc host struct
1269 * Returns a free event from the pool.
1271 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1273 struct ibmvfc_event *evt;
1275 BUG_ON(list_empty(&vhost->free));
1276 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1277 atomic_set(&evt->free, 0);
1278 list_del(&evt->queue);
1283 * ibmvfc_init_event - Initialize fields in an event struct that are always
1286 * @done: Routine to call when the event is responded to
1287 * @format: SRP or MAD format
1289 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1290 void (*done) (struct ibmvfc_event *), u8 format)
1293 evt->sync_iu = NULL;
1294 evt->crq.format = format;
1296 evt->eh_comp = NULL;
1300 * ibmvfc_map_sg_list - Initialize scatterlist
1301 * @scmd: scsi command struct
1302 * @nseg: number of scatterlist segments
1303 * @md: memory descriptor list to initialize
1305 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1306 struct srp_direct_buf *md)
1309 struct scatterlist *sg;
1311 scsi_for_each_sg(scmd, sg, nseg, i) {
1312 md[i].va = cpu_to_be64(sg_dma_address(sg));
1313 md[i].len = cpu_to_be32(sg_dma_len(sg));
1319 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1320 * @scmd: Scsi_Cmnd with the scatterlist
1321 * @evt: ibmvfc event struct
1322 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1323 * @dev: device for which to map dma memory
1326 * 0 on success / non-zero on failure
1328 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1329 struct ibmvfc_event *evt,
1330 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1334 struct srp_direct_buf *data = &vfc_cmd->ioba;
1335 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1337 sg_mapped = scsi_dma_map(scmd);
1339 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
1341 } else if (unlikely(sg_mapped < 0)) {
1342 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1343 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1347 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1348 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
1349 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1351 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
1352 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1355 if (sg_mapped == 1) {
1356 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1360 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
1362 if (!evt->ext_list) {
1363 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1364 &evt->ext_list_token);
1366 if (!evt->ext_list) {
1367 scsi_dma_unmap(scmd);
1368 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1369 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1374 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1376 data->va = cpu_to_be64(evt->ext_list_token);
1377 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
1383 * ibmvfc_timeout - Internal command timeout handler
1384 * @evt: struct ibmvfc_event that timed out
1386 * Called when an internally generated command times out
1388 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1390 struct ibmvfc_host *vhost = evt->vhost;
1391 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1392 ibmvfc_reset_host(vhost);
1396 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1397 * @evt: event to be sent
1398 * @vhost: ibmvfc host struct
1399 * @timeout: timeout in seconds - 0 means do not time command
1401 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1403 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1404 struct ibmvfc_host *vhost, unsigned long timeout)
1406 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
1409 /* Copy the IU into the transfer area */
1410 *evt->xfer_iu = evt->iu;
1411 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1412 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
1413 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1414 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
1418 list_add_tail(&evt->queue, &vhost->sent);
1419 init_timer(&evt->timer);
1422 evt->timer.data = (unsigned long) evt;
1423 evt->timer.expires = jiffies + (timeout * HZ);
1424 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1425 add_timer(&evt->timer);
1430 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1431 be64_to_cpu(crq_as_u64[1])))) {
1432 list_del(&evt->queue);
1433 del_timer(&evt->timer);
1435 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1436 * Firmware will send a CRQ with a transport event (0xFF) to
1437 * tell this client what has happened to the transport. This
1438 * will be handled in ibmvfc_handle_crq()
1440 if (rc == H_CLOSED) {
1441 if (printk_ratelimit())
1442 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1444 scsi_dma_unmap(evt->cmnd);
1445 ibmvfc_free_event(evt);
1446 return SCSI_MLQUEUE_HOST_BUSY;
1449 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1451 evt->cmnd->result = DID_ERROR << 16;
1452 evt->done = ibmvfc_scsi_eh_done;
1454 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
1458 ibmvfc_trc_start(evt);
1464 * ibmvfc_log_error - Log an error for the failed command if appropriate
1465 * @evt: ibmvfc event to log
1468 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1470 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1471 struct ibmvfc_host *vhost = evt->vhost;
1472 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1473 struct scsi_cmnd *cmnd = evt->cmnd;
1474 const char *err = unknown_error;
1475 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
1480 logerr = cmd_status[index].log;
1481 err = cmd_status[index].name;
1484 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1487 if (rsp->flags & FCP_RSP_LEN_VALID)
1488 rsp_code = rsp->data.info.rsp_code;
1490 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1491 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1492 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1493 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1497 * ibmvfc_relogin - Log back into the specified device
1498 * @sdev: scsi device struct
1501 static void ibmvfc_relogin(struct scsi_device *sdev)
1503 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1504 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1505 struct ibmvfc_target *tgt;
1507 list_for_each_entry(tgt, &vhost->targets, queue) {
1508 if (rport == tgt->rport) {
1509 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1514 ibmvfc_reinit_host(vhost);
1518 * ibmvfc_scsi_done - Handle responses from commands
1519 * @evt: ibmvfc event to be handled
1521 * Used as a callback when sending scsi cmds.
1523 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1525 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1526 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1527 struct scsi_cmnd *cmnd = evt->cmnd;
1529 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
1532 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1533 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
1534 else if (rsp->flags & FCP_RESID_UNDER)
1535 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
1537 scsi_set_resid(cmnd, 0);
1539 if (vfc_cmd->status) {
1540 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1542 if (rsp->flags & FCP_RSP_LEN_VALID)
1543 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
1544 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1545 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1546 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1547 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1548 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1549 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
1550 ibmvfc_relogin(cmnd->device);
1552 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1553 cmnd->result = (DID_ERROR << 16);
1555 ibmvfc_log_error(evt);
1558 if (!cmnd->result &&
1559 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1560 cmnd->result = (DID_ERROR << 16);
1562 scsi_dma_unmap(cmnd);
1563 cmnd->scsi_done(cmnd);
1567 complete(evt->eh_comp);
1569 ibmvfc_free_event(evt);
1573 * ibmvfc_host_chkready - Check if the host can accept commands
1574 * @vhost: struct ibmvfc host
1577 * 1 if host can accept command / 0 if not
1579 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1583 switch (vhost->state) {
1584 case IBMVFC_LINK_DEAD:
1585 case IBMVFC_HOST_OFFLINE:
1586 result = DID_NO_CONNECT << 16;
1589 case IBMVFC_INITIALIZING:
1591 case IBMVFC_LINK_DOWN:
1592 result = DID_REQUEUE << 16;
1603 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1604 * @cmnd: struct scsi_cmnd to be executed
1605 * @done: Callback function to be called when cmnd is completed
1608 * 0 on success / other on failure
1610 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
1611 void (*done) (struct scsi_cmnd *))
1613 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1614 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1615 struct ibmvfc_cmd *vfc_cmd;
1616 struct ibmvfc_event *evt;
1619 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1620 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1626 cmnd->result = (DID_OK << 16);
1627 evt = ibmvfc_get_event(vhost);
1628 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1630 cmnd->scsi_done = done;
1631 vfc_cmd = &evt->iu.cmd;
1632 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1633 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1634 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1635 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1636 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1637 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1638 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1639 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1640 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1641 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1642 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1644 if (cmnd->flags & SCMD_TAGGED) {
1645 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1646 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1649 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1650 return ibmvfc_send_event(evt, vhost, 0);
1652 ibmvfc_free_event(evt);
1654 return SCSI_MLQUEUE_HOST_BUSY;
1656 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1657 scmd_printk(KERN_ERR, cmnd,
1658 "Failed to map DMA buffer for command. rc=%d\n", rc);
1660 cmnd->result = DID_ERROR << 16;
1665 static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1668 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1669 * @evt: ibmvfc event struct
1672 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1674 /* copy the response back */
1676 *evt->sync_iu = *evt->xfer_iu;
1678 complete(&evt->comp);
1682 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1683 * @evt: struct ibmvfc_event
1686 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1688 struct ibmvfc_host *vhost = evt->vhost;
1690 ibmvfc_free_event(evt);
1691 vhost->aborting_passthru = 0;
1692 dev_info(vhost->dev, "Passthru command cancelled\n");
1696 * ibmvfc_bsg_timeout - Handle a BSG timeout
1697 * @job: struct fc_bsg_job that timed out
1700 * 0 on success / other on failure
1702 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
1704 struct ibmvfc_host *vhost = shost_priv(job->shost);
1705 unsigned long port_id = (unsigned long)job->dd_data;
1706 struct ibmvfc_event *evt;
1707 struct ibmvfc_tmf *tmf;
1708 unsigned long flags;
1712 spin_lock_irqsave(vhost->host->host_lock, flags);
1713 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1714 __ibmvfc_reset_host(vhost);
1715 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1719 vhost->aborting_passthru = 1;
1720 evt = ibmvfc_get_event(vhost);
1721 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1724 memset(tmf, 0, sizeof(*tmf));
1725 tmf->common.version = cpu_to_be32(1);
1726 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1727 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1728 tmf->scsi_id = cpu_to_be64(port_id);
1729 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1730 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
1731 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1734 vhost->aborting_passthru = 0;
1735 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1738 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1741 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1748 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1749 * @vhost: struct ibmvfc_host to send command
1750 * @port_id: port ID to send command
1753 * 0 on success / other on failure
1755 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1757 struct ibmvfc_port_login *plogi;
1758 struct ibmvfc_target *tgt;
1759 struct ibmvfc_event *evt;
1760 union ibmvfc_iu rsp_iu;
1761 unsigned long flags;
1762 int rc = 0, issue_login = 1;
1765 spin_lock_irqsave(vhost->host->host_lock, flags);
1766 list_for_each_entry(tgt, &vhost->targets, queue) {
1767 if (tgt->scsi_id == port_id) {
1775 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1778 evt = ibmvfc_get_event(vhost);
1779 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1780 plogi = &evt->iu.plogi;
1781 memset(plogi, 0, sizeof(*plogi));
1782 plogi->common.version = cpu_to_be32(1);
1783 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1784 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1785 plogi->scsi_id = cpu_to_be64(port_id);
1786 evt->sync_iu = &rsp_iu;
1787 init_completion(&evt->comp);
1789 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1790 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1795 wait_for_completion(&evt->comp);
1797 if (rsp_iu.plogi.common.status)
1800 spin_lock_irqsave(vhost->host->host_lock, flags);
1801 ibmvfc_free_event(evt);
1803 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1809 * ibmvfc_bsg_request - Handle a BSG request
1810 * @job: struct fc_bsg_job to be executed
1813 * 0 on success / other on failure
1815 static int ibmvfc_bsg_request(struct fc_bsg_job *job)
1817 struct ibmvfc_host *vhost = shost_priv(job->shost);
1818 struct fc_rport *rport = job->rport;
1819 struct ibmvfc_passthru_mad *mad;
1820 struct ibmvfc_event *evt;
1821 union ibmvfc_iu rsp_iu;
1822 unsigned long flags, port_id = -1;
1823 unsigned int code = job->request->msgcode;
1824 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1825 u32 fc_flags, rsp_len;
1828 job->reply->reply_payload_rcv_len = 0;
1830 port_id = rport->port_id;
1833 case FC_BSG_HST_ELS_NOLOGIN:
1834 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
1835 (job->request->rqst_data.h_els.port_id[1] << 8) |
1836 job->request->rqst_data.h_els.port_id[2];
1837 case FC_BSG_RPT_ELS:
1838 fc_flags = IBMVFC_FC_ELS;
1842 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
1843 (job->request->rqst_data.h_ct.port_id[1] << 8) |
1844 job->request->rqst_data.h_ct.port_id[2];
1846 fc_flags = IBMVFC_FC_CT_IU;
1854 if (!mutex_trylock(&vhost->passthru_mutex))
1857 job->dd_data = (void *)port_id;
1858 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1859 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1862 mutex_unlock(&vhost->passthru_mutex);
1866 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1867 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1870 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1871 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1872 mutex_unlock(&vhost->passthru_mutex);
1876 if (req_seg > 1 || rsp_seg > 1) {
1882 rc = ibmvfc_bsg_plogi(vhost, port_id);
1884 spin_lock_irqsave(vhost->host->host_lock, flags);
1886 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1887 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1888 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1892 evt = ibmvfc_get_event(vhost);
1893 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1894 mad = &evt->iu.passthru;
1896 memset(mad, 0, sizeof(*mad));
1897 mad->common.version = cpu_to_be32(1);
1898 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1899 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1901 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1902 offsetof(struct ibmvfc_passthru_mad, iu));
1903 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1905 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1906 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1907 mad->iu.flags = cpu_to_be32(fc_flags);
1908 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1910 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1911 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1912 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1913 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1914 mad->iu.scsi_id = cpu_to_be64(port_id);
1915 mad->iu.tag = cpu_to_be64((u64)evt);
1916 rsp_len = be32_to_cpu(mad->iu.rsp.len);
1918 evt->sync_iu = &rsp_iu;
1919 init_completion(&evt->comp);
1920 rc = ibmvfc_send_event(evt, vhost, 0);
1921 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1928 wait_for_completion(&evt->comp);
1930 if (rsp_iu.passthru.common.status)
1933 job->reply->reply_payload_rcv_len = rsp_len;
1935 spin_lock_irqsave(vhost->host->host_lock, flags);
1936 ibmvfc_free_event(evt);
1937 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1938 job->reply->result = rc;
1942 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1943 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1944 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1945 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1946 mutex_unlock(&vhost->passthru_mutex);
1952 * ibmvfc_reset_device - Reset the device with the specified reset type
1953 * @sdev: scsi device to reset
1955 * @desc: reset type description for log messages
1958 * 0 on success / other on failure
1960 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1962 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1963 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1964 struct ibmvfc_cmd *tmf;
1965 struct ibmvfc_event *evt = NULL;
1966 union ibmvfc_iu rsp_iu;
1967 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1968 int rsp_rc = -EBUSY;
1969 unsigned long flags;
1972 spin_lock_irqsave(vhost->host->host_lock, flags);
1973 if (vhost->state == IBMVFC_ACTIVE) {
1974 evt = ibmvfc_get_event(vhost);
1975 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1978 memset(tmf, 0, sizeof(*tmf));
1979 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1980 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1981 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1982 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1983 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1984 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1985 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
1986 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1987 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
1988 tmf->iu.tmf_flags = type;
1989 evt->sync_iu = &rsp_iu;
1991 init_completion(&evt->comp);
1992 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1994 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1997 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2002 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2003 wait_for_completion(&evt->comp);
2005 if (rsp_iu.cmd.status)
2006 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2009 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2010 rsp_code = fc_rsp->data.info.rsp_code;
2012 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2013 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2014 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2015 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2016 fc_rsp->scsi_status);
2019 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2021 spin_lock_irqsave(vhost->host->host_lock, flags);
2022 ibmvfc_free_event(evt);
2023 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2028 * ibmvfc_match_rport - Match function for specified remote port
2029 * @evt: ibmvfc event struct
2030 * @device: device to match (rport)
2033 * 1 if event matches rport / 0 if event does not match rport
2035 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
2037 struct fc_rport *cmd_rport;
2040 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2041 if (cmd_rport == rport)
2048 * ibmvfc_match_target - Match function for specified target
2049 * @evt: ibmvfc event struct
2050 * @device: device to match (starget)
2053 * 1 if event matches starget / 0 if event does not match starget
2055 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2057 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2063 * ibmvfc_match_lun - Match function for specified LUN
2064 * @evt: ibmvfc event struct
2065 * @device: device to match (sdev)
2068 * 1 if event matches sdev / 0 if event does not match sdev
2070 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2072 if (evt->cmnd && evt->cmnd->device == device)
2078 * ibmvfc_wait_for_ops - Wait for ops to complete
2079 * @vhost: ibmvfc host struct
2080 * @device: device to match (starget or sdev)
2081 * @match: match function
2086 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2087 int (*match) (struct ibmvfc_event *, void *))
2089 struct ibmvfc_event *evt;
2090 DECLARE_COMPLETION_ONSTACK(comp);
2092 unsigned long flags;
2093 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2098 spin_lock_irqsave(vhost->host->host_lock, flags);
2099 list_for_each_entry(evt, &vhost->sent, queue) {
2100 if (match(evt, device)) {
2101 evt->eh_comp = ∁
2105 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2108 timeout = wait_for_completion_timeout(&comp, timeout);
2112 spin_lock_irqsave(vhost->host->host_lock, flags);
2113 list_for_each_entry(evt, &vhost->sent, queue) {
2114 if (match(evt, device)) {
2115 evt->eh_comp = NULL;
2119 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2121 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2123 return wait ? FAILED : SUCCESS;
2133 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2134 * @sdev: scsi device to cancel commands
2135 * @type: type of error recovery being performed
2137 * This sends a cancel to the VIOS for the specified device. This does
2138 * NOT send any abort to the actual device. That must be done separately.
2141 * 0 on success / other on failure
2143 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2145 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2146 struct scsi_target *starget = scsi_target(sdev);
2147 struct fc_rport *rport = starget_to_rport(starget);
2148 struct ibmvfc_tmf *tmf;
2149 struct ibmvfc_event *evt, *found_evt;
2150 union ibmvfc_iu rsp;
2151 int rsp_rc = -EBUSY;
2152 unsigned long flags;
2156 spin_lock_irqsave(vhost->host->host_lock, flags);
2158 list_for_each_entry(evt, &vhost->sent, queue) {
2159 if (evt->cmnd && evt->cmnd->device == sdev) {
2166 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2167 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2168 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2172 if (vhost->logged_in) {
2173 evt = ibmvfc_get_event(vhost);
2174 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2177 memset(tmf, 0, sizeof(*tmf));
2178 tmf->common.version = cpu_to_be32(1);
2179 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2180 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2181 tmf->scsi_id = cpu_to_be64(rport->port_id);
2182 int_to_scsilun(sdev->lun, &tmf->lun);
2183 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
2184 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
2185 if (vhost->state == IBMVFC_ACTIVE)
2186 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
2188 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2189 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2190 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
2192 evt->sync_iu = &rsp;
2193 init_completion(&evt->comp);
2194 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2197 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2200 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2201 /* If failure is received, the host adapter is most likely going
2202 through reset, return success so the caller will wait for the command
2203 being cancelled to get returned */
2207 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2209 wait_for_completion(&evt->comp);
2210 status = be16_to_cpu(rsp.mad_common.status);
2211 spin_lock_irqsave(vhost->host->host_lock, flags);
2212 ibmvfc_free_event(evt);
2213 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2215 if (status != IBMVFC_MAD_SUCCESS) {
2216 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2218 case IBMVFC_MAD_DRIVER_FAILED:
2219 case IBMVFC_MAD_CRQ_ERROR:
2220 /* Host adapter most likely going through reset, return success to
2221 the caller will wait for the command being cancelled to get returned */
2228 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2233 * ibmvfc_match_key - Match function for specified cancel key
2234 * @evt: ibmvfc event struct
2235 * @key: cancel key to match
2238 * 1 if event matches key / 0 if event does not match key
2240 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
2242 unsigned long cancel_key = (unsigned long)key;
2244 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
2245 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
2251 * ibmvfc_match_evt - Match function for specified event
2252 * @evt: ibmvfc event struct
2253 * @match: event to match
2256 * 1 if event matches key / 0 if event does not match key
2258 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2266 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2267 * @sdev: scsi device to abort commands
2269 * This sends an Abort Task Set to the VIOS for the specified device. This does
2270 * NOT send any cancel to the VIOS. That must be done separately.
2273 * 0 on success / other on failure
2275 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2277 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2278 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2279 struct ibmvfc_cmd *tmf;
2280 struct ibmvfc_event *evt, *found_evt;
2281 union ibmvfc_iu rsp_iu;
2282 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2283 int rc, rsp_rc = -EBUSY;
2284 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2287 spin_lock_irqsave(vhost->host->host_lock, flags);
2289 list_for_each_entry(evt, &vhost->sent, queue) {
2290 if (evt->cmnd && evt->cmnd->device == sdev) {
2297 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2298 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2299 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2303 if (vhost->state == IBMVFC_ACTIVE) {
2304 evt = ibmvfc_get_event(vhost);
2305 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2308 memset(tmf, 0, sizeof(*tmf));
2309 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2310 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2311 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2312 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2313 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2314 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2315 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
2316 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2317 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2318 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2319 evt->sync_iu = &rsp_iu;
2321 init_completion(&evt->comp);
2322 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2325 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2328 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2332 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2333 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2336 rc = ibmvfc_cancel_all(sdev, 0);
2338 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2344 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2345 ibmvfc_reset_host(vhost);
2347 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2352 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2353 if (rc != SUCCESS) {
2354 spin_lock_irqsave(vhost->host->host_lock, flags);
2355 ibmvfc_hard_reset_host(vhost);
2356 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2364 if (rsp_iu.cmd.status)
2365 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2368 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2369 rsp_code = fc_rsp->data.info.rsp_code;
2371 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2372 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2373 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2374 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2375 fc_rsp->scsi_status);
2378 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2381 spin_lock_irqsave(vhost->host->host_lock, flags);
2382 ibmvfc_free_event(evt);
2383 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2388 * ibmvfc_eh_abort_handler - Abort a command
2389 * @cmd: scsi command to abort
2392 * SUCCESS / FAST_IO_FAIL / FAILED
2394 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2396 struct scsi_device *sdev = cmd->device;
2397 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2398 int cancel_rc, block_rc;
2402 block_rc = fc_block_scsi_eh(cmd);
2403 ibmvfc_wait_while_resetting(vhost);
2404 if (block_rc != FAST_IO_FAIL) {
2405 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2406 ibmvfc_abort_task_set(sdev);
2408 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2411 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2413 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2421 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2422 * @cmd: scsi command struct
2425 * SUCCESS / FAST_IO_FAIL / FAILED
2427 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2429 struct scsi_device *sdev = cmd->device;
2430 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2431 int cancel_rc, block_rc, reset_rc = 0;
2435 block_rc = fc_block_scsi_eh(cmd);
2436 ibmvfc_wait_while_resetting(vhost);
2437 if (block_rc != FAST_IO_FAIL) {
2438 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2439 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2441 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2443 if (!cancel_rc && !reset_rc)
2444 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2446 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2454 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2455 * @sdev: scsi device struct
2456 * @data: return code
2459 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2461 unsigned long *rc = data;
2462 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2466 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2467 * @sdev: scsi device struct
2468 * @data: return code
2471 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2473 unsigned long *rc = data;
2474 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2478 * ibmvfc_eh_target_reset_handler - Reset the target
2479 * @cmd: scsi command struct
2482 * SUCCESS / FAST_IO_FAIL / FAILED
2484 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2486 struct scsi_device *sdev = cmd->device;
2487 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2488 struct scsi_target *starget = scsi_target(sdev);
2492 unsigned long cancel_rc = 0;
2495 block_rc = fc_block_scsi_eh(cmd);
2496 ibmvfc_wait_while_resetting(vhost);
2497 if (block_rc != FAST_IO_FAIL) {
2498 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2499 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2501 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
2503 if (!cancel_rc && !reset_rc)
2504 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2506 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2514 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2515 * @cmd: struct scsi_cmnd having problems
2518 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2521 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2523 block_rc = fc_block_scsi_eh(cmd);
2524 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2525 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2527 if (block_rc == FAST_IO_FAIL)
2528 return FAST_IO_FAIL;
2530 return rc ? FAILED : SUCCESS;
2534 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2535 * @rport: rport struct
2540 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2542 struct Scsi_Host *shost = rport_to_shost(rport);
2543 struct ibmvfc_host *vhost = shost_priv(shost);
2544 struct fc_rport *dev_rport;
2545 struct scsi_device *sdev;
2549 shost_for_each_device(sdev, shost) {
2550 dev_rport = starget_to_rport(scsi_target(sdev));
2551 if (dev_rport != rport)
2553 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2556 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
2559 ibmvfc_issue_fc_host_lip(shost);
2563 static const struct ibmvfc_async_desc ae_desc [] = {
2564 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2565 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2566 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2567 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2568 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2569 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2570 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2571 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2572 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2573 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2574 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2575 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2576 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
2579 static const struct ibmvfc_async_desc unknown_ae = {
2580 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
2584 * ibmvfc_get_ae_desc - Get text description for async event
2588 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
2592 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2593 if (ae_desc[i].ae == ae)
2599 static const struct {
2600 enum ibmvfc_ae_link_state state;
2603 { IBMVFC_AE_LS_LINK_UP, " link up" },
2604 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2605 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2606 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2610 * ibmvfc_get_link_state - Get text description for link state
2611 * @state: link state
2614 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2618 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2619 if (link_desc[i].state == state)
2620 return link_desc[i].desc;
2626 * ibmvfc_handle_async - Handle an async event from the adapter
2627 * @crq: crq to process
2628 * @vhost: ibmvfc host struct
2631 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2632 struct ibmvfc_host *vhost)
2634 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
2635 struct ibmvfc_target *tgt;
2637 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
2638 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name,
2639 ibmvfc_get_link_state(crq->link_state));
2641 switch (be64_to_cpu(crq->event)) {
2642 case IBMVFC_AE_RESUME:
2643 switch (crq->link_state) {
2644 case IBMVFC_AE_LS_LINK_DOWN:
2645 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2647 case IBMVFC_AE_LS_LINK_DEAD:
2648 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2650 case IBMVFC_AE_LS_LINK_UP:
2651 case IBMVFC_AE_LS_LINK_BOUNCED:
2653 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2654 vhost->delay_init = 1;
2655 __ibmvfc_reset_host(vhost);
2660 case IBMVFC_AE_LINK_UP:
2661 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2662 vhost->delay_init = 1;
2663 __ibmvfc_reset_host(vhost);
2665 case IBMVFC_AE_SCN_FABRIC:
2666 case IBMVFC_AE_SCN_DOMAIN:
2667 vhost->events_to_log |= IBMVFC_AE_RSCN;
2668 if (vhost->state < IBMVFC_HALTED) {
2669 vhost->delay_init = 1;
2670 __ibmvfc_reset_host(vhost);
2673 case IBMVFC_AE_SCN_NPORT:
2674 case IBMVFC_AE_SCN_GROUP:
2675 vhost->events_to_log |= IBMVFC_AE_RSCN;
2676 ibmvfc_reinit_host(vhost);
2678 case IBMVFC_AE_ELS_LOGO:
2679 case IBMVFC_AE_ELS_PRLO:
2680 case IBMVFC_AE_ELS_PLOGI:
2681 list_for_each_entry(tgt, &vhost->targets, queue) {
2682 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2684 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
2686 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
2688 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
2690 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
2692 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
2693 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2694 ibmvfc_reinit_host(vhost);
2698 case IBMVFC_AE_LINK_DOWN:
2699 case IBMVFC_AE_ADAPTER_FAILED:
2700 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2702 case IBMVFC_AE_LINK_DEAD:
2703 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2705 case IBMVFC_AE_HALT:
2706 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2709 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2715 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2716 * @crq: Command/Response queue
2717 * @vhost: ibmvfc host struct
2720 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2723 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
2725 switch (crq->valid) {
2726 case IBMVFC_CRQ_INIT_RSP:
2727 switch (crq->format) {
2728 case IBMVFC_CRQ_INIT:
2729 dev_info(vhost->dev, "Partner initialized\n");
2730 /* Send back a response */
2731 rc = ibmvfc_send_crq_init_complete(vhost);
2733 ibmvfc_init_host(vhost);
2735 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2737 case IBMVFC_CRQ_INIT_COMPLETE:
2738 dev_info(vhost->dev, "Partner initialization complete\n");
2739 ibmvfc_init_host(vhost);
2742 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2745 case IBMVFC_CRQ_XPORT_EVENT:
2746 vhost->state = IBMVFC_NO_CRQ;
2747 vhost->logged_in = 0;
2748 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2749 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2750 /* We need to re-setup the interpartition connection */
2751 dev_info(vhost->dev, "Re-enabling adapter\n");
2752 vhost->client_migrated = 1;
2753 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2754 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2755 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
2757 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2758 ibmvfc_purge_requests(vhost, DID_ERROR);
2759 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2760 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
2763 case IBMVFC_CRQ_CMD_RSP:
2766 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2770 if (crq->format == IBMVFC_ASYNC_EVENT)
2773 /* The only kind of payload CRQs we should get are responses to
2774 * things we send. Make sure this response is to something we
2777 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2778 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2783 if (unlikely(atomic_read(&evt->free))) {
2784 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2789 del_timer(&evt->timer);
2790 list_del(&evt->queue);
2791 ibmvfc_trc_end(evt);
2796 * ibmvfc_scan_finished - Check if the device scan is done.
2797 * @shost: scsi host struct
2798 * @time: current elapsed time
2801 * 0 if scan is not done / 1 if scan is done
2803 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2805 unsigned long flags;
2806 struct ibmvfc_host *vhost = shost_priv(shost);
2809 spin_lock_irqsave(shost->host_lock, flags);
2810 if (time >= (init_timeout * HZ)) {
2811 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2812 "continuing initialization\n", init_timeout);
2816 if (vhost->scan_complete)
2818 spin_unlock_irqrestore(shost->host_lock, flags);
2823 * ibmvfc_slave_alloc - Setup the device's task set value
2824 * @sdev: struct scsi_device device to configure
2826 * Set the device's task set value so that error handling works as
2830 * 0 on success / -ENXIO if device does not exist
2832 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2834 struct Scsi_Host *shost = sdev->host;
2835 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2836 struct ibmvfc_host *vhost = shost_priv(shost);
2837 unsigned long flags = 0;
2839 if (!rport || fc_remote_port_chkready(rport))
2842 spin_lock_irqsave(shost->host_lock, flags);
2843 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2844 spin_unlock_irqrestore(shost->host_lock, flags);
2849 * ibmvfc_target_alloc - Setup the target's task set value
2850 * @starget: struct scsi_target
2852 * Set the target's task set value so that error handling works as
2856 * 0 on success / -ENXIO if device does not exist
2858 static int ibmvfc_target_alloc(struct scsi_target *starget)
2860 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2861 struct ibmvfc_host *vhost = shost_priv(shost);
2862 unsigned long flags = 0;
2864 spin_lock_irqsave(shost->host_lock, flags);
2865 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2866 spin_unlock_irqrestore(shost->host_lock, flags);
2871 * ibmvfc_slave_configure - Configure the device
2872 * @sdev: struct scsi_device device to configure
2874 * Enable allow_restart for a device if it is a disk. Adjust the
2875 * queue_depth here also.
2880 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2882 struct Scsi_Host *shost = sdev->host;
2883 unsigned long flags = 0;
2885 spin_lock_irqsave(shost->host_lock, flags);
2886 if (sdev->type == TYPE_DISK)
2887 sdev->allow_restart = 1;
2888 spin_unlock_irqrestore(shost->host_lock, flags);
2893 * ibmvfc_change_queue_depth - Change the device's queue depth
2894 * @sdev: scsi device struct
2895 * @qdepth: depth to set
2896 * @reason: calling context
2901 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2903 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2904 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2906 return scsi_change_queue_depth(sdev, qdepth);
2909 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2910 struct device_attribute *attr, char *buf)
2912 struct Scsi_Host *shost = class_to_shost(dev);
2913 struct ibmvfc_host *vhost = shost_priv(shost);
2915 return snprintf(buf, PAGE_SIZE, "%s\n",
2916 vhost->login_buf->resp.partition_name);
2919 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2920 struct device_attribute *attr, char *buf)
2922 struct Scsi_Host *shost = class_to_shost(dev);
2923 struct ibmvfc_host *vhost = shost_priv(shost);
2925 return snprintf(buf, PAGE_SIZE, "%s\n",
2926 vhost->login_buf->resp.device_name);
2929 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2930 struct device_attribute *attr, char *buf)
2932 struct Scsi_Host *shost = class_to_shost(dev);
2933 struct ibmvfc_host *vhost = shost_priv(shost);
2935 return snprintf(buf, PAGE_SIZE, "%s\n",
2936 vhost->login_buf->resp.port_loc_code);
2939 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2940 struct device_attribute *attr, char *buf)
2942 struct Scsi_Host *shost = class_to_shost(dev);
2943 struct ibmvfc_host *vhost = shost_priv(shost);
2945 return snprintf(buf, PAGE_SIZE, "%s\n",
2946 vhost->login_buf->resp.drc_name);
2949 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2950 struct device_attribute *attr, char *buf)
2952 struct Scsi_Host *shost = class_to_shost(dev);
2953 struct ibmvfc_host *vhost = shost_priv(shost);
2954 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2957 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2958 struct device_attribute *attr, char *buf)
2960 struct Scsi_Host *shost = class_to_shost(dev);
2961 struct ibmvfc_host *vhost = shost_priv(shost);
2962 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2966 * ibmvfc_show_log_level - Show the adapter's error logging level
2967 * @dev: class device struct
2971 * number of bytes printed to buffer
2973 static ssize_t ibmvfc_show_log_level(struct device *dev,
2974 struct device_attribute *attr, char *buf)
2976 struct Scsi_Host *shost = class_to_shost(dev);
2977 struct ibmvfc_host *vhost = shost_priv(shost);
2978 unsigned long flags = 0;
2981 spin_lock_irqsave(shost->host_lock, flags);
2982 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2983 spin_unlock_irqrestore(shost->host_lock, flags);
2988 * ibmvfc_store_log_level - Change the adapter's error logging level
2989 * @dev: class device struct
2993 * number of bytes printed to buffer
2995 static ssize_t ibmvfc_store_log_level(struct device *dev,
2996 struct device_attribute *attr,
2997 const char *buf, size_t count)
2999 struct Scsi_Host *shost = class_to_shost(dev);
3000 struct ibmvfc_host *vhost = shost_priv(shost);
3001 unsigned long flags = 0;
3003 spin_lock_irqsave(shost->host_lock, flags);
3004 vhost->log_level = simple_strtoul(buf, NULL, 10);
3005 spin_unlock_irqrestore(shost->host_lock, flags);
3009 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3010 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3011 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3012 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3013 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
3014 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
3015 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3016 ibmvfc_show_log_level, ibmvfc_store_log_level);
3018 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3020 * ibmvfc_read_trace - Dump the adapter trace
3021 * @filp: open sysfs file
3022 * @kobj: kobject struct
3023 * @bin_attr: bin_attribute struct
3026 * @count: buffer size
3029 * number of bytes printed to buffer
3031 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
3032 struct bin_attribute *bin_attr,
3033 char *buf, loff_t off, size_t count)
3035 struct device *dev = container_of(kobj, struct device, kobj);
3036 struct Scsi_Host *shost = class_to_shost(dev);
3037 struct ibmvfc_host *vhost = shost_priv(shost);
3038 unsigned long flags = 0;
3039 int size = IBMVFC_TRACE_SIZE;
3040 char *src = (char *)vhost->trace;
3044 if (off + count > size) {
3049 spin_lock_irqsave(shost->host_lock, flags);
3050 memcpy(buf, &src[off], count);
3051 spin_unlock_irqrestore(shost->host_lock, flags);
3055 static struct bin_attribute ibmvfc_trace_attr = {
3061 .read = ibmvfc_read_trace,
3065 static struct device_attribute *ibmvfc_attrs[] = {
3066 &dev_attr_partition_name,
3067 &dev_attr_device_name,
3068 &dev_attr_port_loc_code,
3070 &dev_attr_npiv_version,
3071 &dev_attr_capabilities,
3072 &dev_attr_log_level,
3076 static struct scsi_host_template driver_template = {
3077 .module = THIS_MODULE,
3078 .name = "IBM POWER Virtual FC Adapter",
3079 .proc_name = IBMVFC_NAME,
3080 .queuecommand = ibmvfc_queuecommand,
3081 .eh_abort_handler = ibmvfc_eh_abort_handler,
3082 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3083 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3084 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3085 .slave_alloc = ibmvfc_slave_alloc,
3086 .slave_configure = ibmvfc_slave_configure,
3087 .target_alloc = ibmvfc_target_alloc,
3088 .scan_finished = ibmvfc_scan_finished,
3089 .change_queue_depth = ibmvfc_change_queue_depth,
3091 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3093 .sg_tablesize = SG_ALL,
3094 .max_sectors = IBMVFC_MAX_SECTORS,
3095 .use_clustering = ENABLE_CLUSTERING,
3096 .shost_attrs = ibmvfc_attrs,
3097 .track_queue_depth = 1,
3101 * ibmvfc_next_async_crq - Returns the next entry in async queue
3102 * @vhost: ibmvfc host struct
3105 * Pointer to next entry in queue / NULL if empty
3107 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3109 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3110 struct ibmvfc_async_crq *crq;
3112 crq = &async_crq->msgs[async_crq->cur];
3113 if (crq->valid & 0x80) {
3114 if (++async_crq->cur == async_crq->size)
3124 * ibmvfc_next_crq - Returns the next entry in message queue
3125 * @vhost: ibmvfc host struct
3128 * Pointer to next entry in queue / NULL if empty
3130 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3132 struct ibmvfc_crq_queue *queue = &vhost->crq;
3133 struct ibmvfc_crq *crq;
3135 crq = &queue->msgs[queue->cur];
3136 if (crq->valid & 0x80) {
3137 if (++queue->cur == queue->size)
3147 * ibmvfc_interrupt - Interrupt handler
3148 * @irq: number of irq to handle, not used
3149 * @dev_instance: ibmvfc_host that received interrupt
3154 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3156 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3157 unsigned long flags;
3159 spin_lock_irqsave(vhost->host->host_lock, flags);
3160 vio_disable_interrupts(to_vio_dev(vhost->dev));
3161 tasklet_schedule(&vhost->tasklet);
3162 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3167 * ibmvfc_tasklet - Interrupt handler tasklet
3168 * @data: ibmvfc host struct
3173 static void ibmvfc_tasklet(void *data)
3175 struct ibmvfc_host *vhost = data;
3176 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3177 struct ibmvfc_crq *crq;
3178 struct ibmvfc_async_crq *async;
3179 unsigned long flags;
3182 spin_lock_irqsave(vhost->host->host_lock, flags);
3184 /* Pull all the valid messages off the async CRQ */
3185 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3186 ibmvfc_handle_async(async, vhost);
3191 /* Pull all the valid messages off the CRQ */
3192 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3193 ibmvfc_handle_crq(crq, vhost);
3198 vio_enable_interrupts(vdev);
3199 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3200 vio_disable_interrupts(vdev);
3201 ibmvfc_handle_async(async, vhost);
3204 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3205 vio_disable_interrupts(vdev);
3206 ibmvfc_handle_crq(crq, vhost);
3213 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3217 * ibmvfc_init_tgt - Set the next init job step for the target
3218 * @tgt: ibmvfc target struct
3219 * @job_step: job step to perform
3222 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3223 void (*job_step) (struct ibmvfc_target *))
3225 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3226 tgt->job_step = job_step;
3227 wake_up(&tgt->vhost->work_wait_q);
3231 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3232 * @tgt: ibmvfc target struct
3233 * @job_step: initialization job step
3235 * Returns: 1 if step will be retried / 0 if not
3238 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3239 void (*job_step) (struct ibmvfc_target *))
3241 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3242 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3243 wake_up(&tgt->vhost->work_wait_q);
3246 ibmvfc_init_tgt(tgt, job_step);
3250 /* Defined in FC-LS */
3251 static const struct {
3268 * ibmvfc_get_prli_rsp - Find PRLI response index
3269 * @flags: PRLI response flags
3272 static int ibmvfc_get_prli_rsp(u16 flags)
3275 int code = (flags & 0x0f00) >> 8;
3277 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3278 if (prli_rsp[i].code == code)
3285 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3286 * @evt: ibmvfc event struct
3289 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3291 struct ibmvfc_target *tgt = evt->tgt;
3292 struct ibmvfc_host *vhost = evt->vhost;
3293 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3294 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3295 u32 status = be16_to_cpu(rsp->common.status);
3296 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3298 vhost->discovery_threads--;
3299 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3301 case IBMVFC_MAD_SUCCESS:
3302 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3303 parms->type, parms->flags, parms->service_parms);
3305 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3306 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
3307 if (prli_rsp[index].logged_in) {
3308 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
3309 tgt->need_login = 0;
3311 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
3312 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3313 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
3314 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3318 } else if (prli_rsp[index].retry)
3319 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3321 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3323 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3325 case IBMVFC_MAD_DRIVER_FAILED:
3327 case IBMVFC_MAD_CRQ_ERROR:
3328 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3330 case IBMVFC_MAD_FAILED:
3332 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3333 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
3334 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3335 else if (tgt->logo_rcvd)
3336 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3337 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3338 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3340 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3342 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3343 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3344 rsp->status, rsp->error, status);
3348 kref_put(&tgt->kref, ibmvfc_release_tgt);
3349 ibmvfc_free_event(evt);
3350 wake_up(&vhost->work_wait_q);
3354 * ibmvfc_tgt_send_prli - Send a process login
3355 * @tgt: ibmvfc target struct
3358 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3360 struct ibmvfc_process_login *prli;
3361 struct ibmvfc_host *vhost = tgt->vhost;
3362 struct ibmvfc_event *evt;
3364 if (vhost->discovery_threads >= disc_threads)
3367 kref_get(&tgt->kref);
3368 evt = ibmvfc_get_event(vhost);
3369 vhost->discovery_threads++;
3370 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3372 prli = &evt->iu.prli;
3373 memset(prli, 0, sizeof(*prli));
3374 prli->common.version = cpu_to_be32(1);
3375 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3376 prli->common.length = cpu_to_be16(sizeof(*prli));
3377 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
3379 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3380 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3381 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
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)), rsp->status, rsp->error,
3439 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type,
3440 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status);
3444 kref_put(&tgt->kref, ibmvfc_release_tgt);
3445 ibmvfc_free_event(evt);
3446 wake_up(&vhost->work_wait_q);
3450 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3451 * @tgt: ibmvfc target struct
3454 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3456 struct ibmvfc_port_login *plogi;
3457 struct ibmvfc_host *vhost = tgt->vhost;
3458 struct ibmvfc_event *evt;
3460 if (vhost->discovery_threads >= disc_threads)
3463 kref_get(&tgt->kref);
3465 evt = ibmvfc_get_event(vhost);
3466 vhost->discovery_threads++;
3467 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3468 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3470 plogi = &evt->iu.plogi;
3471 memset(plogi, 0, sizeof(*plogi));
3472 plogi->common.version = cpu_to_be32(1);
3473 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3474 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3475 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
3477 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3478 vhost->discovery_threads--;
3479 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3480 kref_put(&tgt->kref, ibmvfc_release_tgt);
3482 tgt_dbg(tgt, "Sent port login\n");
3486 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3487 * @evt: ibmvfc event struct
3490 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3492 struct ibmvfc_target *tgt = evt->tgt;
3493 struct ibmvfc_host *vhost = evt->vhost;
3494 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3495 u32 status = be16_to_cpu(rsp->common.status);
3497 vhost->discovery_threads--;
3498 ibmvfc_free_event(evt);
3499 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3502 case IBMVFC_MAD_SUCCESS:
3503 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3505 case IBMVFC_MAD_DRIVER_FAILED:
3506 kref_put(&tgt->kref, ibmvfc_release_tgt);
3507 wake_up(&vhost->work_wait_q);
3509 case IBMVFC_MAD_FAILED:
3511 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3515 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3516 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3517 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3518 tgt->scsi_id != tgt->new_scsi_id)
3519 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3520 kref_put(&tgt->kref, ibmvfc_release_tgt);
3521 wake_up(&vhost->work_wait_q);
3525 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3526 * @tgt: ibmvfc target struct
3529 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3531 struct ibmvfc_implicit_logout *mad;
3532 struct ibmvfc_host *vhost = tgt->vhost;
3533 struct ibmvfc_event *evt;
3535 if (vhost->discovery_threads >= disc_threads)
3538 kref_get(&tgt->kref);
3539 evt = ibmvfc_get_event(vhost);
3540 vhost->discovery_threads++;
3541 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3543 mad = &evt->iu.implicit_logout;
3544 memset(mad, 0, sizeof(*mad));
3545 mad->common.version = cpu_to_be32(1);
3546 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3547 mad->common.length = cpu_to_be16(sizeof(*mad));
3548 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
3550 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3551 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3552 vhost->discovery_threads--;
3553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3554 kref_put(&tgt->kref, ibmvfc_release_tgt);
3556 tgt_dbg(tgt, "Sent Implicit Logout\n");
3560 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3561 * @mad: ibmvfc passthru mad struct
3562 * @tgt: ibmvfc target struct
3565 * 1 if PLOGI needed / 0 if PLOGI not needed
3567 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3568 struct ibmvfc_target *tgt)
3570 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3571 sizeof(tgt->ids.port_name)))
3573 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3574 sizeof(tgt->ids.node_name)))
3576 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
3582 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3583 * @evt: ibmvfc event struct
3586 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3588 struct ibmvfc_target *tgt = evt->tgt;
3589 struct ibmvfc_host *vhost = evt->vhost;
3590 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3591 u32 status = be16_to_cpu(mad->common.status);
3592 u8 fc_reason, fc_explain;
3594 vhost->discovery_threads--;
3595 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3596 del_timer(&tgt->timer);
3599 case IBMVFC_MAD_SUCCESS:
3600 tgt_dbg(tgt, "ADISC succeeded\n");
3601 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3602 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3604 case IBMVFC_MAD_DRIVER_FAILED:
3606 case IBMVFC_MAD_FAILED:
3608 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3609 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3610 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
3611 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3612 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
3613 mad->iu.status, mad->iu.error,
3614 ibmvfc_get_fc_type(fc_reason), fc_reason,
3615 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3619 kref_put(&tgt->kref, ibmvfc_release_tgt);
3620 ibmvfc_free_event(evt);
3621 wake_up(&vhost->work_wait_q);
3625 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3626 * @evt: ibmvfc event struct
3629 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3631 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3633 memset(mad, 0, sizeof(*mad));
3634 mad->common.version = cpu_to_be32(1);
3635 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3636 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3637 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3638 offsetof(struct ibmvfc_passthru_mad, iu));
3639 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3640 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3641 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3642 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3643 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3644 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3645 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3646 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3647 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3648 offsetof(struct ibmvfc_passthru_fc_iu, response));
3649 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
3653 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3654 * @evt: ibmvfc event struct
3656 * Just cleanup this event struct. Everything else is handled by
3657 * the ADISC completion handler. If the ADISC never actually comes
3658 * back, we still have the timer running on the ADISC event struct
3659 * which will fire and cause the CRQ to get reset.
3662 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3664 struct ibmvfc_host *vhost = evt->vhost;
3665 struct ibmvfc_target *tgt = evt->tgt;
3667 tgt_dbg(tgt, "ADISC cancel complete\n");
3668 vhost->abort_threads--;
3669 ibmvfc_free_event(evt);
3670 kref_put(&tgt->kref, ibmvfc_release_tgt);
3671 wake_up(&vhost->work_wait_q);
3675 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3676 * @tgt: ibmvfc target struct
3678 * If an ADISC times out, send a cancel. If the cancel times
3679 * out, reset the CRQ. When the ADISC comes back as cancelled,
3680 * log back into the target.
3682 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
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.data = (unsigned long) tgt;
3769 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3770 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3771 add_timer(&tgt->timer);
3774 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3775 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3776 vhost->discovery_threads--;
3777 del_timer(&tgt->timer);
3778 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3779 kref_put(&tgt->kref, ibmvfc_release_tgt);
3781 tgt_dbg(tgt, "Sent ADISC\n");
3785 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3786 * @evt: ibmvfc event struct
3789 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3791 struct ibmvfc_target *tgt = evt->tgt;
3792 struct ibmvfc_host *vhost = evt->vhost;
3793 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3794 u32 status = be16_to_cpu(rsp->common.status);
3795 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3797 vhost->discovery_threads--;
3798 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3800 case IBMVFC_MAD_SUCCESS:
3801 tgt_dbg(tgt, "Query Target succeeded\n");
3802 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3803 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
3804 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3806 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3808 case IBMVFC_MAD_DRIVER_FAILED:
3810 case IBMVFC_MAD_CRQ_ERROR:
3811 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3813 case IBMVFC_MAD_FAILED:
3815 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3816 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3817 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
3818 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3819 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3820 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3822 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3824 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3825 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3826 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)),
3827 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)),
3828 rsp->fc_explain, status);
3832 kref_put(&tgt->kref, ibmvfc_release_tgt);
3833 ibmvfc_free_event(evt);
3834 wake_up(&vhost->work_wait_q);
3838 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3839 * @tgt: ibmvfc target struct
3842 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3844 struct ibmvfc_query_tgt *query_tgt;
3845 struct ibmvfc_host *vhost = tgt->vhost;
3846 struct ibmvfc_event *evt;
3848 if (vhost->discovery_threads >= disc_threads)
3851 kref_get(&tgt->kref);
3852 evt = ibmvfc_get_event(vhost);
3853 vhost->discovery_threads++;
3855 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3856 query_tgt = &evt->iu.query_tgt;
3857 memset(query_tgt, 0, sizeof(*query_tgt));
3858 query_tgt->common.version = cpu_to_be32(1);
3859 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3860 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3861 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
3863 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3864 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3865 vhost->discovery_threads--;
3866 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3867 kref_put(&tgt->kref, ibmvfc_release_tgt);
3869 tgt_dbg(tgt, "Sent Query Target\n");
3873 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3874 * @vhost: ibmvfc host struct
3875 * @scsi_id: SCSI ID to allocate target for
3878 * 0 on success / other on failure
3880 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3882 struct ibmvfc_target *tgt;
3883 unsigned long flags;
3885 spin_lock_irqsave(vhost->host->host_lock, flags);
3886 list_for_each_entry(tgt, &vhost->targets, queue) {
3887 if (tgt->scsi_id == scsi_id) {
3888 if (tgt->need_login)
3889 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3893 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3895 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3897 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
3902 memset(tgt, 0, sizeof(*tgt));
3903 tgt->scsi_id = scsi_id;
3904 tgt->new_scsi_id = scsi_id;
3906 tgt->need_login = 1;
3907 tgt->cancel_key = vhost->task_set++;
3908 init_timer(&tgt->timer);
3909 kref_init(&tgt->kref);
3910 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3911 spin_lock_irqsave(vhost->host->host_lock, flags);
3912 list_add_tail(&tgt->queue, &vhost->targets);
3915 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3920 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3921 * @vhost: ibmvfc host struct
3924 * 0 on success / other on failure
3926 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3930 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3931 rc = ibmvfc_alloc_target(vhost,
3932 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3933 IBMVFC_DISC_TGT_SCSI_ID_MASK);
3939 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3940 * @evt: ibmvfc event struct
3943 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3945 struct ibmvfc_host *vhost = evt->vhost;
3946 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3947 u32 mad_status = be16_to_cpu(rsp->common.status);
3948 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3950 switch (mad_status) {
3951 case IBMVFC_MAD_SUCCESS:
3952 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3953 vhost->num_targets = be32_to_cpu(rsp->num_written);
3954 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3956 case IBMVFC_MAD_FAILED:
3957 level += ibmvfc_retry_host_init(vhost);
3958 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3959 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3960 rsp->status, rsp->error);
3962 case IBMVFC_MAD_DRIVER_FAILED:
3965 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3966 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3970 ibmvfc_free_event(evt);
3971 wake_up(&vhost->work_wait_q);
3975 * ibmvfc_discover_targets - Send Discover Targets MAD
3976 * @vhost: ibmvfc host struct
3979 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3981 struct ibmvfc_discover_targets *mad;
3982 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3984 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3985 mad = &evt->iu.discover_targets;
3986 memset(mad, 0, sizeof(*mad));
3987 mad->common.version = cpu_to_be32(1);
3988 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
3989 mad->common.length = cpu_to_be16(sizeof(*mad));
3990 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
3991 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
3992 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
3993 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3995 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3996 ibmvfc_dbg(vhost, "Sent discover targets\n");
3998 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4002 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4003 * @evt: ibmvfc event struct
4006 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4008 struct ibmvfc_host *vhost = evt->vhost;
4009 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
4010 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4011 unsigned int npiv_max_sectors;
4012 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4014 switch (mad_status) {
4015 case IBMVFC_MAD_SUCCESS:
4016 ibmvfc_free_event(evt);
4018 case IBMVFC_MAD_FAILED:
4019 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4020 level += ibmvfc_retry_host_init(vhost);
4022 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4023 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
4024 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4025 rsp->status, rsp->error);
4026 ibmvfc_free_event(evt);
4028 case IBMVFC_MAD_CRQ_ERROR:
4029 ibmvfc_retry_host_init(vhost);
4030 case IBMVFC_MAD_DRIVER_FAILED:
4031 ibmvfc_free_event(evt);
4034 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4035 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4036 ibmvfc_free_event(evt);
4040 vhost->client_migrated = 0;
4042 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
4043 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4045 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4046 wake_up(&vhost->work_wait_q);
4050 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
4051 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4053 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4054 wake_up(&vhost->work_wait_q);
4058 vhost->logged_in = 1;
4059 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
4060 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4061 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4062 rsp->drc_name, npiv_max_sectors);
4064 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4065 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4066 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4067 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
4068 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4069 fc_host_supported_classes(vhost->host) = 0;
4070 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
4071 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
4072 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
4073 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
4074 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
4075 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4076 fc_host_maxframe_size(vhost->host) =
4077 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
4079 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
4080 vhost->host->max_sectors = npiv_max_sectors;
4081 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4082 wake_up(&vhost->work_wait_q);
4086 * ibmvfc_npiv_login - Sends NPIV login
4087 * @vhost: ibmvfc host struct
4090 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4092 struct ibmvfc_npiv_login_mad *mad;
4093 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4095 ibmvfc_gather_partition_info(vhost);
4096 ibmvfc_set_login_info(vhost);
4097 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4099 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4100 mad = &evt->iu.npiv_login;
4101 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
4102 mad->common.version = cpu_to_be32(1);
4103 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4104 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4105 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4106 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
4108 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4110 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4111 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4113 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4117 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4118 * @vhost: ibmvfc host struct
4121 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4123 struct ibmvfc_host *vhost = evt->vhost;
4124 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
4126 ibmvfc_free_event(evt);
4128 switch (mad_status) {
4129 case IBMVFC_MAD_SUCCESS:
4130 if (list_empty(&vhost->sent) &&
4131 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
4132 ibmvfc_init_host(vhost);
4136 case IBMVFC_MAD_FAILED:
4137 case IBMVFC_MAD_NOT_SUPPORTED:
4138 case IBMVFC_MAD_CRQ_ERROR:
4139 case IBMVFC_MAD_DRIVER_FAILED:
4141 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4145 ibmvfc_hard_reset_host(vhost);
4149 * ibmvfc_npiv_logout - Issue an NPIV Logout
4150 * @vhost: ibmvfc host struct
4153 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4155 struct ibmvfc_npiv_logout_mad *mad;
4156 struct ibmvfc_event *evt;
4158 evt = ibmvfc_get_event(vhost);
4159 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4161 mad = &evt->iu.npiv_logout;
4162 memset(mad, 0, sizeof(*mad));
4163 mad->common.version = cpu_to_be32(1);
4164 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4165 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
4167 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4169 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4170 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4172 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4176 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4177 * @vhost: ibmvfc host struct
4180 * 1 if work to do / 0 if not
4182 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4184 struct ibmvfc_target *tgt;
4186 list_for_each_entry(tgt, &vhost->targets, queue) {
4187 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4188 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4196 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4197 * @vhost: ibmvfc host struct
4200 * 1 if work to do / 0 if not
4202 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4204 struct ibmvfc_target *tgt;
4206 if (kthread_should_stop())
4208 switch (vhost->action) {
4209 case IBMVFC_HOST_ACTION_NONE:
4210 case IBMVFC_HOST_ACTION_INIT_WAIT:
4211 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4213 case IBMVFC_HOST_ACTION_TGT_INIT:
4214 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4215 if (vhost->discovery_threads == disc_threads)
4217 list_for_each_entry(tgt, &vhost->targets, queue)
4218 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4220 list_for_each_entry(tgt, &vhost->targets, queue)
4221 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4224 case IBMVFC_HOST_ACTION_LOGO:
4225 case IBMVFC_HOST_ACTION_INIT:
4226 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4227 case IBMVFC_HOST_ACTION_TGT_DEL:
4228 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4229 case IBMVFC_HOST_ACTION_QUERY:
4230 case IBMVFC_HOST_ACTION_RESET:
4231 case IBMVFC_HOST_ACTION_REENABLE:
4240 * ibmvfc_work_to_do - Is there task level work to do?
4241 * @vhost: ibmvfc host struct
4244 * 1 if work to do / 0 if not
4246 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4248 unsigned long flags;
4251 spin_lock_irqsave(vhost->host->host_lock, flags);
4252 rc = __ibmvfc_work_to_do(vhost);
4253 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4258 * ibmvfc_log_ae - Log async events if necessary
4259 * @vhost: ibmvfc host struct
4260 * @events: events to log
4263 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4265 if (events & IBMVFC_AE_RSCN)
4266 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4267 if ((events & IBMVFC_AE_LINKDOWN) &&
4268 vhost->state >= IBMVFC_HALTED)
4269 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4270 if ((events & IBMVFC_AE_LINKUP) &&
4271 vhost->state == IBMVFC_INITIALIZING)
4272 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4276 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4277 * @tgt: ibmvfc target struct
4280 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4282 struct ibmvfc_host *vhost = tgt->vhost;
4283 struct fc_rport *rport;
4284 unsigned long flags;
4286 tgt_dbg(tgt, "Adding rport\n");
4287 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4288 spin_lock_irqsave(vhost->host->host_lock, flags);
4290 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4291 tgt_dbg(tgt, "Deleting rport\n");
4292 list_del(&tgt->queue);
4293 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4294 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4295 fc_remote_port_delete(rport);
4296 del_timer_sync(&tgt->timer);
4297 kref_put(&tgt->kref, ibmvfc_release_tgt);
4299 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4300 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4305 tgt_dbg(tgt, "rport add succeeded\n");
4307 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
4308 rport->supported_classes = 0;
4309 tgt->target_id = rport->scsi_target_id;
4310 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
4311 rport->supported_classes |= FC_COS_CLASS1;
4312 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
4313 rport->supported_classes |= FC_COS_CLASS2;
4314 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
4315 rport->supported_classes |= FC_COS_CLASS3;
4317 blk_queue_max_segments(rport->rqst_q, 1);
4319 tgt_dbg(tgt, "rport add failed\n");
4320 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4324 * ibmvfc_do_work - Do task level work
4325 * @vhost: ibmvfc host struct
4328 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4330 struct ibmvfc_target *tgt;
4331 unsigned long flags;
4332 struct fc_rport *rport;
4335 ibmvfc_log_ae(vhost, vhost->events_to_log);
4336 spin_lock_irqsave(vhost->host->host_lock, flags);
4337 vhost->events_to_log = 0;
4338 switch (vhost->action) {
4339 case IBMVFC_HOST_ACTION_NONE:
4340 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4341 case IBMVFC_HOST_ACTION_INIT_WAIT:
4343 case IBMVFC_HOST_ACTION_RESET:
4344 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4345 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4346 rc = ibmvfc_reset_crq(vhost);
4347 spin_lock_irqsave(vhost->host->host_lock, flags);
4349 vio_enable_interrupts(to_vio_dev(vhost->dev));
4350 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4351 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
4352 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4353 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4356 case IBMVFC_HOST_ACTION_REENABLE:
4357 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4358 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4359 rc = ibmvfc_reenable_crq_queue(vhost);
4360 spin_lock_irqsave(vhost->host->host_lock, flags);
4361 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4362 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4363 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4366 case IBMVFC_HOST_ACTION_LOGO:
4367 vhost->job_step(vhost);
4369 case IBMVFC_HOST_ACTION_INIT:
4370 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
4371 if (vhost->delay_init) {
4372 vhost->delay_init = 0;
4373 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4377 vhost->job_step(vhost);
4379 case IBMVFC_HOST_ACTION_QUERY:
4380 list_for_each_entry(tgt, &vhost->targets, queue)
4381 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4382 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4384 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4385 list_for_each_entry(tgt, &vhost->targets, queue) {
4386 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4392 if (!ibmvfc_dev_init_to_do(vhost))
4393 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4395 case IBMVFC_HOST_ACTION_TGT_DEL:
4396 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4397 list_for_each_entry(tgt, &vhost->targets, queue) {
4398 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4399 tgt_dbg(tgt, "Deleting rport\n");
4402 list_del(&tgt->queue);
4403 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4404 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4406 fc_remote_port_delete(rport);
4407 del_timer_sync(&tgt->timer);
4408 kref_put(&tgt->kref, ibmvfc_release_tgt);
4413 if (vhost->state == IBMVFC_INITIALIZING) {
4414 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
4415 if (vhost->reinit) {
4417 scsi_block_requests(vhost->host);
4418 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4419 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4421 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4422 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4423 wake_up(&vhost->init_wait_q);
4424 schedule_work(&vhost->rport_add_work_q);
4425 vhost->init_retries = 0;
4426 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4427 scsi_unblock_requests(vhost->host);
4432 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4433 vhost->job_step = ibmvfc_discover_targets;
4436 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4437 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4438 scsi_unblock_requests(vhost->host);
4439 wake_up(&vhost->init_wait_q);
4443 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4444 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4445 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4446 ibmvfc_alloc_targets(vhost);
4447 spin_lock_irqsave(vhost->host->host_lock, flags);
4449 case IBMVFC_HOST_ACTION_TGT_INIT:
4450 list_for_each_entry(tgt, &vhost->targets, queue) {
4451 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4457 if (!ibmvfc_dev_init_to_do(vhost))
4458 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4464 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4468 * ibmvfc_work - Do task level work
4469 * @data: ibmvfc host struct
4474 static int ibmvfc_work(void *data)
4476 struct ibmvfc_host *vhost = data;
4479 set_user_nice(current, MIN_NICE);
4482 rc = wait_event_interruptible(vhost->work_wait_q,
4483 ibmvfc_work_to_do(vhost));
4487 if (kthread_should_stop())
4490 ibmvfc_do_work(vhost);
4493 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4498 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4499 * @vhost: ibmvfc host struct
4501 * Allocates a page for messages, maps it for dma, and registers
4502 * the crq with the hypervisor.
4505 * zero on success / other on failure
4507 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4509 int rc, retrc = -ENOMEM;
4510 struct device *dev = vhost->dev;
4511 struct vio_dev *vdev = to_vio_dev(dev);
4512 struct ibmvfc_crq_queue *crq = &vhost->crq;
4515 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4520 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4521 crq->msg_token = dma_map_single(dev, crq->msgs,
4522 PAGE_SIZE, DMA_BIDIRECTIONAL);
4524 if (dma_mapping_error(dev, crq->msg_token))
4527 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4528 crq->msg_token, PAGE_SIZE);
4530 if (rc == H_RESOURCE)
4531 /* maybe kexecing and resource is busy. try a reset */
4532 retrc = rc = ibmvfc_reset_crq(vhost);
4535 dev_warn(dev, "Partner adapter not ready\n");
4537 dev_warn(dev, "Error %d opening adapter\n", rc);
4538 goto reg_crq_failed;
4543 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4545 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4546 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4547 goto req_irq_failed;
4550 if ((rc = vio_enable_interrupts(vdev))) {
4551 dev_err(dev, "Error %d enabling interrupts\n", rc);
4552 goto req_irq_failed;
4560 tasklet_kill(&vhost->tasklet);
4562 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4563 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4565 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4567 free_page((unsigned long)crq->msgs);
4572 * ibmvfc_free_mem - Free memory for vhost
4573 * @vhost: ibmvfc host struct
4578 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4580 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4583 mempool_destroy(vhost->tgt_pool);
4584 kfree(vhost->trace);
4585 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4586 vhost->disc_buf_dma);
4587 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4588 vhost->login_buf, vhost->login_buf_dma);
4589 dma_pool_destroy(vhost->sg_pool);
4590 dma_unmap_single(vhost->dev, async_q->msg_token,
4591 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4592 free_page((unsigned long)async_q->msgs);
4597 * ibmvfc_alloc_mem - Allocate memory for vhost
4598 * @vhost: ibmvfc host struct
4601 * 0 on success / non-zero on failure
4603 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4605 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4606 struct device *dev = vhost->dev;
4609 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4610 if (!async_q->msgs) {
4611 dev_err(dev, "Couldn't allocate async queue.\n");
4615 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4616 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4617 async_q->size * sizeof(*async_q->msgs),
4620 if (dma_mapping_error(dev, async_q->msg_token)) {
4621 dev_err(dev, "Failed to map async queue\n");
4622 goto free_async_crq;
4625 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4626 SG_ALL * sizeof(struct srp_direct_buf),
4627 sizeof(struct srp_direct_buf), 0);
4629 if (!vhost->sg_pool) {
4630 dev_err(dev, "Failed to allocate sg pool\n");
4631 goto unmap_async_crq;
4634 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4635 &vhost->login_buf_dma, GFP_KERNEL);
4637 if (!vhost->login_buf) {
4638 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4642 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4643 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4644 &vhost->disc_buf_dma, GFP_KERNEL);
4646 if (!vhost->disc_buf) {
4647 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4648 goto free_login_buffer;
4651 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4652 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4655 goto free_disc_buffer;
4657 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4658 sizeof(struct ibmvfc_target));
4660 if (!vhost->tgt_pool) {
4661 dev_err(dev, "Couldn't allocate target memory pool\n");
4669 kfree(vhost->trace);
4671 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4672 vhost->disc_buf_dma);
4674 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4675 vhost->login_buf, vhost->login_buf_dma);
4677 dma_pool_destroy(vhost->sg_pool);
4679 dma_unmap_single(dev, async_q->msg_token,
4680 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4682 free_page((unsigned long)async_q->msgs);
4689 * ibmvfc_rport_add_thread - Worker thread for rport adds
4690 * @work: work struct
4693 static void ibmvfc_rport_add_thread(struct work_struct *work)
4695 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4697 struct ibmvfc_target *tgt;
4698 struct fc_rport *rport;
4699 unsigned long flags;
4703 spin_lock_irqsave(vhost->host->host_lock, flags);
4706 if (vhost->state != IBMVFC_ACTIVE)
4709 list_for_each_entry(tgt, &vhost->targets, queue) {
4710 if (tgt->add_rport) {
4713 kref_get(&tgt->kref);
4716 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4717 ibmvfc_tgt_add_rport(tgt);
4718 } else if (get_device(&rport->dev)) {
4719 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4720 tgt_dbg(tgt, "Setting rport roles\n");
4721 fc_remote_port_rolechg(rport, tgt->ids.roles);
4722 put_device(&rport->dev);
4725 kref_put(&tgt->kref, ibmvfc_release_tgt);
4726 spin_lock_irqsave(vhost->host->host_lock, flags);
4732 if (vhost->state == IBMVFC_ACTIVE)
4733 vhost->scan_complete = 1;
4734 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4739 * ibmvfc_probe - Adapter hot plug add entry point
4740 * @vdev: vio device struct
4741 * @id: vio device id struct
4744 * 0 on success / non-zero on failure
4746 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4748 struct ibmvfc_host *vhost;
4749 struct Scsi_Host *shost;
4750 struct device *dev = &vdev->dev;
4754 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4756 dev_err(dev, "Couldn't allocate host data\n");
4760 shost->transportt = ibmvfc_transport_template;
4761 shost->can_queue = max_requests;
4762 shost->max_lun = max_lun;
4763 shost->max_id = max_targets;
4764 shost->max_sectors = IBMVFC_MAX_SECTORS;
4765 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4766 shost->unique_id = shost->host_no;
4768 vhost = shost_priv(shost);
4769 INIT_LIST_HEAD(&vhost->sent);
4770 INIT_LIST_HEAD(&vhost->free);
4771 INIT_LIST_HEAD(&vhost->targets);
4772 sprintf(vhost->name, IBMVFC_NAME);
4773 vhost->host = shost;
4775 vhost->partition_number = -1;
4776 vhost->log_level = log_level;
4777 vhost->task_set = 1;
4778 strcpy(vhost->partition_name, "UNKNOWN");
4779 init_waitqueue_head(&vhost->work_wait_q);
4780 init_waitqueue_head(&vhost->init_wait_q);
4781 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4782 mutex_init(&vhost->passthru_mutex);
4784 if ((rc = ibmvfc_alloc_mem(vhost)))
4785 goto free_scsi_host;
4787 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4790 if (IS_ERR(vhost->work_thread)) {
4791 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4792 PTR_ERR(vhost->work_thread));
4796 if ((rc = ibmvfc_init_crq(vhost))) {
4797 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4801 if ((rc = ibmvfc_init_event_pool(vhost))) {
4802 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4806 if ((rc = scsi_add_host(shost, dev)))
4807 goto release_event_pool;
4809 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4811 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4812 &ibmvfc_trace_attr))) {
4813 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4817 if (shost_to_fc_host(shost)->rqst_q)
4818 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
4819 dev_set_drvdata(dev, vhost);
4820 spin_lock(&ibmvfc_driver_lock);
4821 list_add_tail(&vhost->queue, &ibmvfc_head);
4822 spin_unlock(&ibmvfc_driver_lock);
4824 ibmvfc_send_crq_init(vhost);
4825 scsi_scan_host(shost);
4829 scsi_remove_host(shost);
4831 ibmvfc_free_event_pool(vhost);
4833 ibmvfc_release_crq_queue(vhost);
4835 kthread_stop(vhost->work_thread);
4837 ibmvfc_free_mem(vhost);
4839 scsi_host_put(shost);
4846 * ibmvfc_remove - Adapter hot plug remove entry point
4847 * @vdev: vio device struct
4852 static int ibmvfc_remove(struct vio_dev *vdev)
4854 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4855 unsigned long flags;
4858 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4860 spin_lock_irqsave(vhost->host->host_lock, flags);
4861 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4862 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4864 ibmvfc_wait_while_resetting(vhost);
4865 ibmvfc_release_crq_queue(vhost);
4866 kthread_stop(vhost->work_thread);
4867 fc_remove_host(vhost->host);
4868 scsi_remove_host(vhost->host);
4870 spin_lock_irqsave(vhost->host->host_lock, flags);
4871 ibmvfc_purge_requests(vhost, DID_ERROR);
4872 ibmvfc_free_event_pool(vhost);
4873 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4875 ibmvfc_free_mem(vhost);
4876 spin_lock(&ibmvfc_driver_lock);
4877 list_del(&vhost->queue);
4878 spin_unlock(&ibmvfc_driver_lock);
4879 scsi_host_put(vhost->host);
4885 * ibmvfc_resume - Resume from suspend
4886 * @dev: device struct
4888 * We may have lost an interrupt across suspend/resume, so kick the
4892 static int ibmvfc_resume(struct device *dev)
4894 unsigned long flags;
4895 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4896 struct vio_dev *vdev = to_vio_dev(dev);
4898 spin_lock_irqsave(vhost->host->host_lock, flags);
4899 vio_disable_interrupts(vdev);
4900 tasklet_schedule(&vhost->tasklet);
4901 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4906 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4907 * @vdev: vio device struct
4910 * Number of bytes the driver will need to DMA map at the same time in
4911 * order to perform well.
4913 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4915 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4916 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4919 static struct vio_device_id ibmvfc_device_table[] = {
4920 {"fcp", "IBM,vfc-client"},
4923 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4925 static struct dev_pm_ops ibmvfc_pm_ops = {
4926 .resume = ibmvfc_resume
4929 static struct vio_driver ibmvfc_driver = {
4930 .id_table = ibmvfc_device_table,
4931 .probe = ibmvfc_probe,
4932 .remove = ibmvfc_remove,
4933 .get_desired_dma = ibmvfc_get_desired_dma,
4934 .name = IBMVFC_NAME,
4935 .pm = &ibmvfc_pm_ops,
4938 static struct fc_function_template ibmvfc_transport_functions = {
4939 .show_host_fabric_name = 1,
4940 .show_host_node_name = 1,
4941 .show_host_port_name = 1,
4942 .show_host_supported_classes = 1,
4943 .show_host_port_type = 1,
4944 .show_host_port_id = 1,
4945 .show_host_maxframe_size = 1,
4947 .get_host_port_state = ibmvfc_get_host_port_state,
4948 .show_host_port_state = 1,
4950 .get_host_speed = ibmvfc_get_host_speed,
4951 .show_host_speed = 1,
4953 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4954 .terminate_rport_io = ibmvfc_terminate_rport_io,
4956 .show_rport_maxframe_size = 1,
4957 .show_rport_supported_classes = 1,
4959 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4960 .show_rport_dev_loss_tmo = 1,
4962 .get_starget_node_name = ibmvfc_get_starget_node_name,
4963 .show_starget_node_name = 1,
4965 .get_starget_port_name = ibmvfc_get_starget_port_name,
4966 .show_starget_port_name = 1,
4968 .get_starget_port_id = ibmvfc_get_starget_port_id,
4969 .show_starget_port_id = 1,
4971 .bsg_request = ibmvfc_bsg_request,
4972 .bsg_timeout = ibmvfc_bsg_timeout,
4976 * ibmvfc_module_init - Initialize the ibmvfc module
4979 * 0 on success / other on failure
4981 static int __init ibmvfc_module_init(void)
4985 if (!firmware_has_feature(FW_FEATURE_VIO))
4988 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4989 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4991 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4992 if (!ibmvfc_transport_template)
4995 rc = vio_register_driver(&ibmvfc_driver);
4997 fc_release_transport(ibmvfc_transport_template);
5002 * ibmvfc_module_exit - Teardown the ibmvfc module
5007 static void __exit ibmvfc_module_exit(void)
5009 vio_unregister_driver(&ibmvfc_driver);
5010 fc_release_transport(ibmvfc_transport_template);
5013 module_init(ibmvfc_module_init);
5014 module_exit(ibmvfc_module_exit);