1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
7 * Copyright (C) IBM Corporation, 2008
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/dmapool.h>
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/irqdomain.h>
17 #include <linux/kthread.h>
18 #include <linux/slab.h>
21 #include <linux/stringify.h>
22 #include <linux/bsg-lib.h>
23 #include <asm/firmware.h>
27 #include <scsi/scsi.h>
28 #include <scsi/scsi_cmnd.h>
29 #include <scsi/scsi_host.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_tcq.h>
32 #include <scsi/scsi_transport_fc.h>
33 #include <scsi/scsi_bsg_fc.h>
36 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
37 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
38 static u64 max_lun = IBMVFC_MAX_LUN;
39 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
40 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
41 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
42 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
43 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
44 static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
45 static unsigned int mq_enabled = IBMVFC_MQ;
46 static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES;
47 static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS;
48 static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ;
49 static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M;
51 static LIST_HEAD(ibmvfc_head);
52 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
53 static struct scsi_transport_template *ibmvfc_transport_template;
55 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
56 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
60 module_param_named(mq, mq_enabled, uint, S_IRUGO);
61 MODULE_PARM_DESC(mq, "Enable multiqueue support. "
62 "[Default=" __stringify(IBMVFC_MQ) "]");
63 module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO);
64 MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. "
65 "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]");
66 module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO);
67 MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. "
68 "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]");
69 module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO);
70 MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. "
71 "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]");
72 module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO);
73 MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. "
74 "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]");
76 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
77 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
78 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
79 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
80 MODULE_PARM_DESC(default_timeout,
81 "Default timeout in seconds for initialization and EH commands. "
82 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
83 module_param_named(max_requests, max_requests, uint, S_IRUGO);
84 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
85 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
86 module_param_named(max_lun, max_lun, ullong, S_IRUGO);
87 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
88 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
89 module_param_named(max_targets, max_targets, uint, S_IRUGO);
90 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
91 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
92 module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
93 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
94 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
95 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
96 MODULE_PARM_DESC(debug, "Enable driver debug information. "
97 "[Default=" __stringify(IBMVFC_DEBUG) "]");
98 module_param_named(log_level, log_level, uint, 0);
99 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
100 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
101 module_param_named(cls3_error, cls3_error, uint, 0);
102 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
103 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
105 static const struct {
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
116 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
117 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
118 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
119 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
120 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
121 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
122 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
123 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
124 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
125 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
126 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
128 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
129 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
130 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
131 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
132 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
133 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
134 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
135 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
136 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
137 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
139 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
140 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
141 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
142 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
143 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
144 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
145 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
146 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
147 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
148 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
149 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
151 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
152 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." },
155 static void ibmvfc_npiv_login(struct ibmvfc_host *);
156 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
157 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
158 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
159 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
160 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *);
161 static void ibmvfc_tgt_move_login(struct ibmvfc_target *);
163 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *);
164 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *);
166 static const char *unknown_error = "unknown error";
168 static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba,
169 unsigned long length, unsigned long *cookie,
172 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
175 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length);
182 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags)
184 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities);
186 return (host_caps & cap_flags) ? 1 : 0;
189 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost,
190 struct ibmvfc_cmd *vfc_cmd)
192 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
193 return &vfc_cmd->v2.iu;
195 return &vfc_cmd->v1.iu;
198 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost,
199 struct ibmvfc_cmd *vfc_cmd)
201 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
202 return &vfc_cmd->v2.rsp;
204 return &vfc_cmd->v1.rsp;
207 #ifdef CONFIG_SCSI_IBMVFC_TRACE
209 * ibmvfc_trc_start - Log a start trace entry
210 * @evt: ibmvfc event struct
213 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
215 struct ibmvfc_host *vhost = evt->vhost;
216 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
217 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
218 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
219 struct ibmvfc_trace_entry *entry;
220 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK;
222 entry = &vhost->trace[index];
224 entry->time = jiffies;
225 entry->fmt = evt->crq.format;
226 entry->type = IBMVFC_TRC_START;
228 switch (entry->fmt) {
229 case IBMVFC_CMD_FORMAT:
230 entry->op_code = iu->cdb[0];
231 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
232 entry->lun = scsilun_to_int(&iu->lun);
233 entry->tmf_flags = iu->tmf_flags;
234 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len);
236 case IBMVFC_MAD_FORMAT:
237 entry->op_code = be32_to_cpu(mad->opcode);
245 * ibmvfc_trc_end - Log an end trace entry
246 * @evt: ibmvfc event struct
249 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
251 struct ibmvfc_host *vhost = evt->vhost;
252 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
253 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
254 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
255 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
256 struct ibmvfc_trace_entry *entry;
257 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK;
259 entry = &vhost->trace[index];
261 entry->time = jiffies;
262 entry->fmt = evt->crq.format;
263 entry->type = IBMVFC_TRC_END;
265 switch (entry->fmt) {
266 case IBMVFC_CMD_FORMAT:
267 entry->op_code = iu->cdb[0];
268 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
269 entry->lun = scsilun_to_int(&iu->lun);
270 entry->tmf_flags = iu->tmf_flags;
271 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
272 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
273 entry->u.end.fcp_rsp_flags = rsp->flags;
274 entry->u.end.rsp_code = rsp->data.info.rsp_code;
275 entry->u.end.scsi_status = rsp->scsi_status;
277 case IBMVFC_MAD_FORMAT:
278 entry->op_code = be32_to_cpu(mad->opcode);
279 entry->u.end.status = be16_to_cpu(mad->status);
288 #define ibmvfc_trc_start(evt) do { } while (0)
289 #define ibmvfc_trc_end(evt) do { } while (0)
293 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
294 * @status: status / error class
298 * index into cmd_status / -EINVAL on failure
300 static int ibmvfc_get_err_index(u16 status, u16 error)
304 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
305 if ((cmd_status[i].status & status) == cmd_status[i].status &&
306 cmd_status[i].error == error)
313 * ibmvfc_get_cmd_error - Find the error description for the fcp response
314 * @status: status / error class
318 * error description string
320 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
322 int rc = ibmvfc_get_err_index(status, error);
324 return cmd_status[rc].name;
325 return unknown_error;
329 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
330 * @vhost: ibmvfc host struct
331 * @vfc_cmd: ibmvfc command struct
334 * SCSI result value to return for completed command
336 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd)
339 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
340 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
342 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
343 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
344 rsp->data.info.rsp_code))
345 return DID_ERROR << 16;
347 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
349 return rsp->scsi_status | (cmd_status[err].result << 16);
350 return rsp->scsi_status | (DID_ERROR << 16);
354 * ibmvfc_retry_cmd - Determine if error status is retryable
355 * @status: status / error class
359 * 1 if error should be retried / 0 if it should not
361 static int ibmvfc_retry_cmd(u16 status, u16 error)
363 int rc = ibmvfc_get_err_index(status, error);
366 return cmd_status[rc].retry;
370 static const char *unknown_fc_explain = "unknown fc explain";
372 static const struct {
376 { 0x00, "no additional explanation" },
377 { 0x01, "service parameter error - options" },
378 { 0x03, "service parameter error - initiator control" },
379 { 0x05, "service parameter error - recipient control" },
380 { 0x07, "service parameter error - received data field size" },
381 { 0x09, "service parameter error - concurrent seq" },
382 { 0x0B, "service parameter error - credit" },
383 { 0x0D, "invalid N_Port/F_Port_Name" },
384 { 0x0E, "invalid node/Fabric Name" },
385 { 0x0F, "invalid common service parameters" },
386 { 0x11, "invalid association header" },
387 { 0x13, "association header required" },
388 { 0x15, "invalid originator S_ID" },
389 { 0x17, "invalid OX_ID-RX-ID combination" },
390 { 0x19, "command (request) already in progress" },
391 { 0x1E, "N_Port Login requested" },
392 { 0x1F, "Invalid N_Port_ID" },
395 static const struct {
399 { 0x00, "no additional explanation" },
400 { 0x01, "port identifier not registered" },
401 { 0x02, "port name not registered" },
402 { 0x03, "node name not registered" },
403 { 0x04, "class of service not registered" },
404 { 0x06, "initial process associator not registered" },
405 { 0x07, "FC-4 TYPEs not registered" },
406 { 0x08, "symbolic port name not registered" },
407 { 0x09, "symbolic node name not registered" },
408 { 0x0A, "port type not registered" },
409 { 0xF0, "authorization exception" },
410 { 0xF1, "authentication exception" },
411 { 0xF2, "data base full" },
412 { 0xF3, "data base empty" },
413 { 0xF4, "processing request" },
414 { 0xF5, "unable to verify connection" },
415 { 0xF6, "devices not in a common zone" },
419 * ibmvfc_get_ls_explain - Return the FC Explain description text
420 * @status: FC Explain status
425 static const char *ibmvfc_get_ls_explain(u16 status)
429 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
430 if (ls_explain[i].fc_explain == status)
431 return ls_explain[i].name;
433 return unknown_fc_explain;
437 * ibmvfc_get_gs_explain - Return the FC Explain description text
438 * @status: FC Explain status
443 static const char *ibmvfc_get_gs_explain(u16 status)
447 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
448 if (gs_explain[i].fc_explain == status)
449 return gs_explain[i].name;
451 return unknown_fc_explain;
454 static const struct {
455 enum ibmvfc_fc_type fc_type;
458 { IBMVFC_FABRIC_REJECT, "fabric reject" },
459 { IBMVFC_PORT_REJECT, "port reject" },
460 { IBMVFC_LS_REJECT, "ELS reject" },
461 { IBMVFC_FABRIC_BUSY, "fabric busy" },
462 { IBMVFC_PORT_BUSY, "port busy" },
463 { IBMVFC_BASIC_REJECT, "basic reject" },
466 static const char *unknown_fc_type = "unknown fc type";
469 * ibmvfc_get_fc_type - Return the FC Type description text
470 * @status: FC Type error status
475 static const char *ibmvfc_get_fc_type(u16 status)
479 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
480 if (fc_type[i].fc_type == status)
481 return fc_type[i].name;
483 return unknown_fc_type;
487 * ibmvfc_set_tgt_action - Set the next init action for the target
488 * @tgt: ibmvfc target struct
489 * @action: action to perform
492 * 0 if action changed / non-zero if not changed
494 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
495 enum ibmvfc_target_action action)
499 switch (tgt->action) {
500 case IBMVFC_TGT_ACTION_LOGOUT_RPORT:
501 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT ||
502 action == IBMVFC_TGT_ACTION_DEL_RPORT) {
503 tgt->action = action;
507 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT:
508 if (action == IBMVFC_TGT_ACTION_DEL_RPORT ||
509 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) {
510 tgt->action = action;
514 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT:
515 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) {
516 tgt->action = action;
520 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT:
521 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) {
522 tgt->action = action;
526 case IBMVFC_TGT_ACTION_DEL_RPORT:
527 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
528 tgt->action = action;
532 case IBMVFC_TGT_ACTION_DELETED_RPORT:
535 tgt->action = action;
540 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT)
547 * ibmvfc_set_host_state - Set the state for the host
548 * @vhost: ibmvfc host struct
549 * @state: state to set host to
552 * 0 if state changed / non-zero if not changed
554 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
555 enum ibmvfc_host_state state)
559 switch (vhost->state) {
560 case IBMVFC_HOST_OFFLINE:
564 vhost->state = state;
572 * ibmvfc_set_host_action - Set the next init action for the host
573 * @vhost: ibmvfc host struct
574 * @action: action to perform
577 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
578 enum ibmvfc_host_action action)
581 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
582 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
583 vhost->action = action;
585 case IBMVFC_HOST_ACTION_LOGO_WAIT:
586 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
587 vhost->action = action;
589 case IBMVFC_HOST_ACTION_INIT_WAIT:
590 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
591 vhost->action = action;
593 case IBMVFC_HOST_ACTION_QUERY:
594 switch (vhost->action) {
595 case IBMVFC_HOST_ACTION_INIT_WAIT:
596 case IBMVFC_HOST_ACTION_NONE:
597 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
598 vhost->action = action;
604 case IBMVFC_HOST_ACTION_TGT_INIT:
605 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
606 vhost->action = action;
608 case IBMVFC_HOST_ACTION_REENABLE:
609 case IBMVFC_HOST_ACTION_RESET:
610 vhost->action = action;
612 case IBMVFC_HOST_ACTION_INIT:
613 case IBMVFC_HOST_ACTION_TGT_DEL:
614 case IBMVFC_HOST_ACTION_LOGO:
615 case IBMVFC_HOST_ACTION_QUERY_TGTS:
616 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
617 case IBMVFC_HOST_ACTION_NONE:
619 switch (vhost->action) {
620 case IBMVFC_HOST_ACTION_RESET:
621 case IBMVFC_HOST_ACTION_REENABLE:
624 vhost->action = action;
632 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
633 * @vhost: ibmvfc host struct
638 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
640 if (vhost->action == IBMVFC_HOST_ACTION_NONE &&
641 vhost->state == IBMVFC_ACTIVE) {
642 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
643 scsi_block_requests(vhost->host);
644 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
649 wake_up(&vhost->work_wait_q);
653 * ibmvfc_del_tgt - Schedule cleanup and removal of the target
654 * @tgt: ibmvfc target struct
656 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt)
658 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) {
659 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del;
660 tgt->init_retries = 0;
662 wake_up(&tgt->vhost->work_wait_q);
666 * ibmvfc_link_down - Handle a link down event from the adapter
667 * @vhost: ibmvfc host struct
668 * @state: ibmvfc host state to enter
671 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
672 enum ibmvfc_host_state state)
674 struct ibmvfc_target *tgt;
677 scsi_block_requests(vhost->host);
678 list_for_each_entry(tgt, &vhost->targets, queue)
680 ibmvfc_set_host_state(vhost, state);
681 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
682 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
683 wake_up(&vhost->work_wait_q);
688 * ibmvfc_init_host - Start host initialization
689 * @vhost: ibmvfc host struct
694 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
696 struct ibmvfc_target *tgt;
698 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
699 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
701 "Host initialization retries exceeded. Taking adapter offline\n");
702 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
707 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
708 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE);
709 vhost->async_crq.cur = 0;
711 list_for_each_entry(tgt, &vhost->targets, queue)
713 scsi_block_requests(vhost->host);
714 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
715 vhost->job_step = ibmvfc_npiv_login;
716 wake_up(&vhost->work_wait_q);
721 * ibmvfc_send_crq - Send a CRQ
722 * @vhost: ibmvfc host struct
723 * @word1: the first 64 bits of the data
724 * @word2: the second 64 bits of the data
727 * 0 on success / other on failure
729 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
731 struct vio_dev *vdev = to_vio_dev(vhost->dev);
732 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
735 static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1,
736 u64 word2, u64 word3, u64 word4)
738 struct vio_dev *vdev = to_vio_dev(vhost->dev);
740 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie,
741 word1, word2, word3, word4);
745 * ibmvfc_send_crq_init - Send a CRQ init message
746 * @vhost: ibmvfc host struct
749 * 0 on success / other on failure
751 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
753 ibmvfc_dbg(vhost, "Sending CRQ init\n");
754 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
758 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
759 * @vhost: ibmvfc host struct
762 * 0 on success / other on failure
764 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
766 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
767 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
771 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
772 * @vhost: ibmvfc host who owns the event pool
773 * @queue: ibmvfc queue struct
776 * Returns zero on success.
778 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost,
779 struct ibmvfc_queue *queue,
783 struct ibmvfc_event_pool *pool = &queue->evt_pool;
790 pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL);
794 pool->iu_storage = dma_alloc_coherent(vhost->dev,
795 size * sizeof(*pool->iu_storage),
798 if (!pool->iu_storage) {
803 INIT_LIST_HEAD(&queue->sent);
804 INIT_LIST_HEAD(&queue->free);
805 spin_lock_init(&queue->l_lock);
807 for (i = 0; i < size; ++i) {
808 struct ibmvfc_event *evt = &pool->events[i];
813 * 0 = being completed
816 atomic_set(&evt->active, -1);
817 atomic_set(&evt->free, 1);
818 evt->crq.valid = 0x80;
819 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
820 evt->xfer_iu = pool->iu_storage + i;
823 evt->ext_list = NULL;
824 list_add_tail(&evt->queue_list, &queue->free);
832 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
833 * @vhost: ibmvfc host who owns the event pool
834 * @queue: ibmvfc queue struct
837 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost,
838 struct ibmvfc_queue *queue)
841 struct ibmvfc_event_pool *pool = &queue->evt_pool;
844 for (i = 0; i < pool->size; ++i) {
845 list_del(&pool->events[i].queue_list);
846 BUG_ON(atomic_read(&pool->events[i].free) != 1);
847 if (pool->events[i].ext_list)
848 dma_pool_free(vhost->sg_pool,
849 pool->events[i].ext_list,
850 pool->events[i].ext_list_token);
854 dma_free_coherent(vhost->dev,
855 pool->size * sizeof(*pool->iu_storage),
856 pool->iu_storage, pool->iu_token);
861 * ibmvfc_free_queue - Deallocate queue
862 * @vhost: ibmvfc host struct
863 * @queue: ibmvfc queue struct
865 * Unmaps dma and deallocates page for messages
867 static void ibmvfc_free_queue(struct ibmvfc_host *vhost,
868 struct ibmvfc_queue *queue)
870 struct device *dev = vhost->dev;
872 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
873 free_page((unsigned long)queue->msgs.handle);
874 queue->msgs.handle = NULL;
876 ibmvfc_free_event_pool(vhost, queue);
880 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
881 * @vhost: ibmvfc host struct
883 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
884 * the crq with the hypervisor.
886 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
889 struct vio_dev *vdev = to_vio_dev(vhost->dev);
890 struct ibmvfc_queue *crq = &vhost->crq;
892 ibmvfc_dbg(vhost, "Releasing CRQ\n");
893 free_irq(vdev->irq, vhost);
894 tasklet_kill(&vhost->tasklet);
898 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
899 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
901 vhost->state = IBMVFC_NO_CRQ;
902 vhost->logged_in = 0;
904 ibmvfc_free_queue(vhost, crq);
908 * ibmvfc_reenable_crq_queue - reenables the CRQ
909 * @vhost: ibmvfc host struct
912 * 0 on success / other on failure
914 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
917 struct vio_dev *vdev = to_vio_dev(vhost->dev);
920 ibmvfc_release_sub_crqs(vhost);
922 /* Re-enable the CRQ */
926 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
927 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
930 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
932 spin_lock_irqsave(vhost->host->host_lock, flags);
933 spin_lock(vhost->crq.q_lock);
934 vhost->do_enquiry = 1;
935 vhost->using_channels = 0;
936 spin_unlock(vhost->crq.q_lock);
937 spin_unlock_irqrestore(vhost->host->host_lock, flags);
939 ibmvfc_init_sub_crqs(vhost);
945 * ibmvfc_reset_crq - resets a crq after a failure
946 * @vhost: ibmvfc host struct
949 * 0 on success / other on failure
951 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
955 struct vio_dev *vdev = to_vio_dev(vhost->dev);
956 struct ibmvfc_queue *crq = &vhost->crq;
958 ibmvfc_release_sub_crqs(vhost);
964 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
965 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
967 spin_lock_irqsave(vhost->host->host_lock, flags);
968 spin_lock(vhost->crq.q_lock);
969 vhost->state = IBMVFC_NO_CRQ;
970 vhost->logged_in = 0;
971 vhost->do_enquiry = 1;
972 vhost->using_channels = 0;
974 /* Clean out the queue */
975 memset(crq->msgs.crq, 0, PAGE_SIZE);
978 /* And re-open it again */
979 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
980 crq->msg_token, PAGE_SIZE);
983 /* Adapter is good, but other end is not ready */
984 dev_warn(vhost->dev, "Partner adapter not ready\n");
986 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
988 spin_unlock(vhost->crq.q_lock);
989 spin_unlock_irqrestore(vhost->host->host_lock, flags);
991 ibmvfc_init_sub_crqs(vhost);
997 * ibmvfc_valid_event - Determines if event is valid.
998 * @pool: event_pool that contains the event
999 * @evt: ibmvfc event to be checked for validity
1002 * 1 if event is valid / 0 if event is not valid
1004 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
1005 struct ibmvfc_event *evt)
1007 int index = evt - pool->events;
1008 if (index < 0 || index >= pool->size) /* outside of bounds */
1010 if (evt != pool->events + index) /* unaligned */
1016 * ibmvfc_free_event - Free the specified event
1017 * @evt: ibmvfc_event to be freed
1020 static void ibmvfc_free_event(struct ibmvfc_event *evt)
1022 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool;
1023 unsigned long flags;
1025 BUG_ON(!ibmvfc_valid_event(pool, evt));
1026 BUG_ON(atomic_inc_return(&evt->free) != 1);
1027 BUG_ON(atomic_dec_and_test(&evt->active));
1029 spin_lock_irqsave(&evt->queue->l_lock, flags);
1030 list_add_tail(&evt->queue_list, &evt->queue->free);
1032 complete(evt->eh_comp);
1033 spin_unlock_irqrestore(&evt->queue->l_lock, flags);
1037 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
1038 * @evt: ibmvfc event struct
1040 * This function does not setup any error status, that must be done
1041 * before this function gets called.
1043 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
1045 struct scsi_cmnd *cmnd = evt->cmnd;
1048 scsi_dma_unmap(cmnd);
1049 cmnd->scsi_done(cmnd);
1052 ibmvfc_free_event(evt);
1056 * ibmvfc_complete_purge - Complete failed command list
1057 * @purge_list: list head of failed commands
1059 * This function runs completions on commands to fail as a result of a
1060 * host reset or platform migration.
1062 static void ibmvfc_complete_purge(struct list_head *purge_list)
1064 struct ibmvfc_event *evt, *pos;
1066 list_for_each_entry_safe(evt, pos, purge_list, queue_list) {
1067 list_del(&evt->queue_list);
1068 ibmvfc_trc_end(evt);
1074 * ibmvfc_fail_request - Fail request with specified error code
1075 * @evt: ibmvfc event struct
1076 * @error_code: error code to fail request with
1081 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
1084 * Anything we are failing should still be active. Otherwise, it
1085 * implies we already got a response for the command and are doing
1086 * something bad like double completing it.
1088 BUG_ON(!atomic_dec_and_test(&evt->active));
1090 evt->cmnd->result = (error_code << 16);
1091 evt->done = ibmvfc_scsi_eh_done;
1093 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
1095 del_timer(&evt->timer);
1099 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
1100 * @vhost: ibmvfc host struct
1101 * @error_code: error code to fail requests with
1106 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
1108 struct ibmvfc_event *evt, *pos;
1109 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs;
1110 unsigned long flags;
1114 if (vhost->using_channels)
1115 hwqs = vhost->scsi_scrqs.active_queues;
1117 ibmvfc_dbg(vhost, "Purging all requests\n");
1118 spin_lock_irqsave(&vhost->crq.l_lock, flags);
1119 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list)
1120 ibmvfc_fail_request(evt, error_code);
1121 list_splice_init(&vhost->crq.sent, &vhost->purge);
1122 spin_unlock_irqrestore(&vhost->crq.l_lock, flags);
1124 for (i = 0; i < hwqs; i++) {
1125 spin_lock_irqsave(queues[i].q_lock, flags);
1126 spin_lock(&queues[i].l_lock);
1127 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list)
1128 ibmvfc_fail_request(evt, error_code);
1129 list_splice_init(&queues[i].sent, &vhost->purge);
1130 spin_unlock(&queues[i].l_lock);
1131 spin_unlock_irqrestore(queues[i].q_lock, flags);
1136 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
1137 * @vhost: struct ibmvfc host to reset
1139 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
1141 ibmvfc_purge_requests(vhost, DID_ERROR);
1142 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
1143 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
1147 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
1148 * @vhost: struct ibmvfc host to reset
1150 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
1152 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
1153 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
1154 scsi_block_requests(vhost->host);
1155 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
1156 vhost->job_step = ibmvfc_npiv_logout;
1157 wake_up(&vhost->work_wait_q);
1159 ibmvfc_hard_reset_host(vhost);
1163 * ibmvfc_reset_host - Reset the connection to the server
1164 * @vhost: ibmvfc host struct
1166 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
1168 unsigned long flags;
1170 spin_lock_irqsave(vhost->host->host_lock, flags);
1171 __ibmvfc_reset_host(vhost);
1172 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1176 * ibmvfc_retry_host_init - Retry host initialization if allowed
1177 * @vhost: ibmvfc host struct
1179 * Returns: 1 if init will be retried / 0 if not
1182 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
1186 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1187 vhost->delay_init = 1;
1188 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
1190 "Host initialization retries exceeded. Taking adapter offline\n");
1191 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1192 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
1193 __ibmvfc_reset_host(vhost);
1195 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
1200 wake_up(&vhost->work_wait_q);
1205 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
1206 * @starget: scsi target struct
1209 * ibmvfc_target struct / NULL if not found
1211 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
1213 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1214 struct ibmvfc_host *vhost = shost_priv(shost);
1215 struct ibmvfc_target *tgt;
1217 list_for_each_entry(tgt, &vhost->targets, queue)
1218 if (tgt->target_id == starget->id) {
1219 kref_get(&tgt->kref);
1226 * ibmvfc_get_target - Find the specified scsi_target
1227 * @starget: scsi target struct
1230 * ibmvfc_target struct / NULL if not found
1232 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
1234 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1235 struct ibmvfc_target *tgt;
1236 unsigned long flags;
1238 spin_lock_irqsave(shost->host_lock, flags);
1239 tgt = __ibmvfc_get_target(starget);
1240 spin_unlock_irqrestore(shost->host_lock, flags);
1245 * ibmvfc_get_host_speed - Get host port speed
1246 * @shost: scsi host struct
1251 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
1253 struct ibmvfc_host *vhost = shost_priv(shost);
1254 unsigned long flags;
1256 spin_lock_irqsave(shost->host_lock, flags);
1257 if (vhost->state == IBMVFC_ACTIVE) {
1258 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
1260 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
1263 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
1266 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
1269 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
1272 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
1275 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
1278 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
1279 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
1280 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1284 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1285 spin_unlock_irqrestore(shost->host_lock, flags);
1289 * ibmvfc_get_host_port_state - Get host port state
1290 * @shost: scsi host struct
1295 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1297 struct ibmvfc_host *vhost = shost_priv(shost);
1298 unsigned long flags;
1300 spin_lock_irqsave(shost->host_lock, flags);
1301 switch (vhost->state) {
1302 case IBMVFC_INITIALIZING:
1304 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1306 case IBMVFC_LINK_DOWN:
1307 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1309 case IBMVFC_LINK_DEAD:
1310 case IBMVFC_HOST_OFFLINE:
1311 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1314 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1317 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1320 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1321 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1324 spin_unlock_irqrestore(shost->host_lock, flags);
1328 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1329 * @rport: rport struct
1330 * @timeout: timeout value
1335 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1338 rport->dev_loss_tmo = timeout;
1340 rport->dev_loss_tmo = 1;
1344 * ibmvfc_release_tgt - Free memory allocated for a target
1345 * @kref: kref struct
1348 static void ibmvfc_release_tgt(struct kref *kref)
1350 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1355 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1356 * @starget: scsi target struct
1361 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1363 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1364 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1366 kref_put(&tgt->kref, ibmvfc_release_tgt);
1370 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1371 * @starget: scsi target struct
1376 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1378 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1379 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1381 kref_put(&tgt->kref, ibmvfc_release_tgt);
1385 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1386 * @starget: scsi target struct
1391 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1393 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1394 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1396 kref_put(&tgt->kref, ibmvfc_release_tgt);
1400 * ibmvfc_wait_while_resetting - Wait while the host resets
1401 * @vhost: ibmvfc host struct
1404 * 0 on success / other on failure
1406 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1408 long timeout = wait_event_timeout(vhost->init_wait_q,
1409 ((vhost->state == IBMVFC_ACTIVE ||
1410 vhost->state == IBMVFC_HOST_OFFLINE ||
1411 vhost->state == IBMVFC_LINK_DEAD) &&
1412 vhost->action == IBMVFC_HOST_ACTION_NONE),
1413 (init_timeout * HZ));
1415 return timeout ? 0 : -EIO;
1419 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1420 * @shost: scsi host struct
1423 * 0 on success / other on failure
1425 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1427 struct ibmvfc_host *vhost = shost_priv(shost);
1429 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1430 ibmvfc_reset_host(vhost);
1431 return ibmvfc_wait_while_resetting(vhost);
1435 * ibmvfc_gather_partition_info - Gather info about the LPAR
1436 * @vhost: ibmvfc host struct
1441 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1443 struct device_node *rootdn;
1445 const unsigned int *num;
1447 rootdn = of_find_node_by_path("/");
1451 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1453 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1454 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1456 vhost->partition_number = *num;
1457 of_node_put(rootdn);
1461 * ibmvfc_set_login_info - Setup info for NPIV login
1462 * @vhost: ibmvfc host struct
1467 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1469 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1470 struct ibmvfc_queue *async_crq = &vhost->async_crq;
1471 struct device_node *of_node = vhost->dev->of_node;
1472 const char *location;
1474 memset(login_info, 0, sizeof(*login_info));
1476 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1477 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1478 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1479 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1480 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1481 login_info->vfc_frame_version = cpu_to_be32(1);
1482 login_info->fcp_version = cpu_to_be16(3);
1483 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
1484 if (vhost->client_migrated)
1485 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
1487 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1488 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN);
1490 if (vhost->mq_enabled || vhost->using_channels)
1491 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS);
1493 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1494 login_info->async.len = cpu_to_be32(async_crq->size *
1495 sizeof(*async_crq->msgs.async));
1496 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1497 strncpy(login_info->device_name,
1498 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1500 location = of_get_property(of_node, "ibm,loc-code", NULL);
1501 location = location ? location : dev_name(vhost->dev);
1502 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1506 * ibmvfc_get_event - Gets the next free event in pool
1507 * @queue: ibmvfc queue struct
1509 * Returns a free event from the pool.
1511 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue)
1513 struct ibmvfc_event *evt;
1514 unsigned long flags;
1516 spin_lock_irqsave(&queue->l_lock, flags);
1517 BUG_ON(list_empty(&queue->free));
1518 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list);
1519 atomic_set(&evt->free, 0);
1520 list_del(&evt->queue_list);
1521 spin_unlock_irqrestore(&queue->l_lock, flags);
1526 * ibmvfc_locked_done - Calls evt completion with host_lock held
1527 * @evt: ibmvfc evt to complete
1529 * All non-scsi command completion callbacks have the expectation that the
1530 * host_lock is held. This callback is used by ibmvfc_init_event to wrap a
1531 * MAD evt with the host_lock.
1533 static void ibmvfc_locked_done(struct ibmvfc_event *evt)
1535 unsigned long flags;
1537 spin_lock_irqsave(evt->vhost->host->host_lock, flags);
1539 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags);
1543 * ibmvfc_init_event - Initialize fields in an event struct that are always
1546 * @done: Routine to call when the event is responded to
1547 * @format: SRP or MAD format
1549 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1550 void (*done) (struct ibmvfc_event *), u8 format)
1553 evt->sync_iu = NULL;
1554 evt->eh_comp = NULL;
1555 evt->crq.format = format;
1556 if (format == IBMVFC_CMD_FORMAT)
1560 evt->done = ibmvfc_locked_done;
1566 * ibmvfc_map_sg_list - Initialize scatterlist
1567 * @scmd: scsi command struct
1568 * @nseg: number of scatterlist segments
1569 * @md: memory descriptor list to initialize
1571 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1572 struct srp_direct_buf *md)
1575 struct scatterlist *sg;
1577 scsi_for_each_sg(scmd, sg, nseg, i) {
1578 md[i].va = cpu_to_be64(sg_dma_address(sg));
1579 md[i].len = cpu_to_be32(sg_dma_len(sg));
1585 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields
1586 * @scmd: struct scsi_cmnd with the scatterlist
1587 * @evt: ibmvfc event struct
1588 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1589 * @dev: device for which to map dma memory
1592 * 0 on success / non-zero on failure
1594 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1595 struct ibmvfc_event *evt,
1596 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1600 struct srp_direct_buf *data = &vfc_cmd->ioba;
1601 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1602 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd);
1605 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1607 sg_mapped = scsi_dma_map(scmd);
1609 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
1611 } else if (unlikely(sg_mapped < 0)) {
1612 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1613 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1617 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1618 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
1619 iu->add_cdb_len |= IBMVFC_WRDATA;
1621 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
1622 iu->add_cdb_len |= IBMVFC_RDDATA;
1625 if (sg_mapped == 1) {
1626 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1630 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
1632 if (!evt->ext_list) {
1633 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1634 &evt->ext_list_token);
1636 if (!evt->ext_list) {
1637 scsi_dma_unmap(scmd);
1638 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1639 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1644 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1646 data->va = cpu_to_be64(evt->ext_list_token);
1647 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
1653 * ibmvfc_timeout - Internal command timeout handler
1654 * @t: struct ibmvfc_event that timed out
1656 * Called when an internally generated command times out
1658 static void ibmvfc_timeout(struct timer_list *t)
1660 struct ibmvfc_event *evt = from_timer(evt, t, timer);
1661 struct ibmvfc_host *vhost = evt->vhost;
1662 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1663 ibmvfc_reset_host(vhost);
1667 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1668 * @evt: event to be sent
1669 * @vhost: ibmvfc host struct
1670 * @timeout: timeout in seconds - 0 means do not time command
1672 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1674 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1675 struct ibmvfc_host *vhost, unsigned long timeout)
1677 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
1678 unsigned long flags;
1681 /* Copy the IU into the transfer area */
1682 *evt->xfer_iu = evt->iu;
1683 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1684 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
1685 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1686 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
1690 timer_setup(&evt->timer, ibmvfc_timeout, 0);
1693 evt->timer.expires = jiffies + (timeout * HZ);
1694 add_timer(&evt->timer);
1697 spin_lock_irqsave(&evt->queue->l_lock, flags);
1698 list_add_tail(&evt->queue_list, &evt->queue->sent);
1702 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT)
1703 rc = ibmvfc_send_sub_crq(vhost,
1704 evt->queue->vios_cookie,
1705 be64_to_cpu(crq_as_u64[0]),
1706 be64_to_cpu(crq_as_u64[1]),
1709 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1710 be64_to_cpu(crq_as_u64[1]));
1713 list_del(&evt->queue_list);
1714 spin_unlock_irqrestore(&evt->queue->l_lock, flags);
1715 del_timer(&evt->timer);
1717 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1718 * Firmware will send a CRQ with a transport event (0xFF) to
1719 * tell this client what has happened to the transport. This
1720 * will be handled in ibmvfc_handle_crq()
1722 if (rc == H_CLOSED) {
1723 if (printk_ratelimit())
1724 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1726 scsi_dma_unmap(evt->cmnd);
1727 ibmvfc_free_event(evt);
1728 return SCSI_MLQUEUE_HOST_BUSY;
1731 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1733 evt->cmnd->result = DID_ERROR << 16;
1734 evt->done = ibmvfc_scsi_eh_done;
1736 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
1740 atomic_set(&evt->active, 1);
1741 spin_unlock_irqrestore(&evt->queue->l_lock, flags);
1742 ibmvfc_trc_start(evt);
1749 * ibmvfc_log_error - Log an error for the failed command if appropriate
1750 * @evt: ibmvfc event to log
1753 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1755 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1756 struct ibmvfc_host *vhost = evt->vhost;
1757 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
1758 struct scsi_cmnd *cmnd = evt->cmnd;
1759 const char *err = unknown_error;
1760 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
1765 logerr = cmd_status[index].log;
1766 err = cmd_status[index].name;
1769 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1772 if (rsp->flags & FCP_RSP_LEN_VALID)
1773 rsp_code = rsp->data.info.rsp_code;
1775 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
1776 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1777 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error),
1778 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1782 * ibmvfc_relogin - Log back into the specified device
1783 * @sdev: scsi device struct
1786 static void ibmvfc_relogin(struct scsi_device *sdev)
1788 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1789 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1790 struct ibmvfc_target *tgt;
1791 unsigned long flags;
1793 spin_lock_irqsave(vhost->host->host_lock, flags);
1794 list_for_each_entry(tgt, &vhost->targets, queue) {
1795 if (rport == tgt->rport) {
1796 ibmvfc_del_tgt(tgt);
1801 ibmvfc_reinit_host(vhost);
1802 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1806 * ibmvfc_scsi_done - Handle responses from commands
1807 * @evt: ibmvfc event to be handled
1809 * Used as a callback when sending scsi cmds.
1811 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1813 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1814 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd);
1815 struct scsi_cmnd *cmnd = evt->cmnd;
1817 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
1820 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1821 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
1822 else if (rsp->flags & FCP_RESID_UNDER)
1823 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
1825 scsi_set_resid(cmnd, 0);
1827 if (vfc_cmd->status) {
1828 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd);
1830 if (rsp->flags & FCP_RSP_LEN_VALID)
1831 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
1832 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1833 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1834 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1835 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1836 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1837 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
1838 ibmvfc_relogin(cmnd->device);
1840 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1841 cmnd->result = (DID_ERROR << 16);
1843 ibmvfc_log_error(evt);
1846 if (!cmnd->result &&
1847 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1848 cmnd->result = (DID_ERROR << 16);
1850 scsi_dma_unmap(cmnd);
1851 cmnd->scsi_done(cmnd);
1854 ibmvfc_free_event(evt);
1858 * ibmvfc_host_chkready - Check if the host can accept commands
1859 * @vhost: struct ibmvfc host
1862 * 1 if host can accept command / 0 if not
1864 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1868 switch (vhost->state) {
1869 case IBMVFC_LINK_DEAD:
1870 case IBMVFC_HOST_OFFLINE:
1871 result = DID_NO_CONNECT << 16;
1874 case IBMVFC_INITIALIZING:
1876 case IBMVFC_LINK_DOWN:
1877 result = DID_REQUEUE << 16;
1887 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev)
1889 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1890 struct ibmvfc_host *vhost = evt->vhost;
1891 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
1892 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
1893 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
1896 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1897 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
1898 offset = offsetof(struct ibmvfc_cmd, v2.rsp);
1899 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name);
1901 offset = offsetof(struct ibmvfc_cmd, v1.rsp);
1902 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset);
1903 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp));
1904 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1905 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu));
1906 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp));
1907 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1908 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1909 int_to_scsilun(sdev->lun, &iu->lun);
1915 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1916 * @shost: scsi host struct
1917 * @cmnd: struct scsi_cmnd to be executed
1920 * 0 on success / other on failure
1922 static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
1924 struct ibmvfc_host *vhost = shost_priv(shost);
1925 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1926 struct ibmvfc_cmd *vfc_cmd;
1927 struct ibmvfc_fcp_cmd_iu *iu;
1928 struct ibmvfc_event *evt;
1929 u32 tag_and_hwq = blk_mq_unique_tag(cmnd->request);
1930 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq);
1934 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1935 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1937 cmnd->scsi_done(cmnd);
1941 cmnd->result = (DID_OK << 16);
1942 if (vhost->using_channels) {
1943 scsi_channel = hwq % vhost->scsi_scrqs.active_queues;
1944 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]);
1945 evt->hwq = hwq % vhost->scsi_scrqs.active_queues;
1947 evt = ibmvfc_get_event(&vhost->crq);
1949 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1952 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device);
1953 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
1955 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1956 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len);
1958 if (cmnd->flags & SCMD_TAGGED) {
1959 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1960 iu->pri_task_attr = IBMVFC_SIMPLE_TASK;
1963 vfc_cmd->correlation = cpu_to_be64((u64)evt);
1965 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1966 return ibmvfc_send_event(evt, vhost, 0);
1968 ibmvfc_free_event(evt);
1970 return SCSI_MLQUEUE_HOST_BUSY;
1972 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1973 scmd_printk(KERN_ERR, cmnd,
1974 "Failed to map DMA buffer for command. rc=%d\n", rc);
1976 cmnd->result = DID_ERROR << 16;
1977 cmnd->scsi_done(cmnd);
1982 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1983 * @evt: ibmvfc event struct
1986 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1988 /* copy the response back */
1990 *evt->sync_iu = *evt->xfer_iu;
1992 complete(&evt->comp);
1996 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1997 * @evt: struct ibmvfc_event
2000 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
2002 struct ibmvfc_host *vhost = evt->vhost;
2004 ibmvfc_free_event(evt);
2005 vhost->aborting_passthru = 0;
2006 dev_info(vhost->dev, "Passthru command cancelled\n");
2010 * ibmvfc_bsg_timeout - Handle a BSG timeout
2011 * @job: struct bsg_job that timed out
2014 * 0 on success / other on failure
2016 static int ibmvfc_bsg_timeout(struct bsg_job *job)
2018 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
2019 unsigned long port_id = (unsigned long)job->dd_data;
2020 struct ibmvfc_event *evt;
2021 struct ibmvfc_tmf *tmf;
2022 unsigned long flags;
2026 spin_lock_irqsave(vhost->host->host_lock, flags);
2027 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
2028 __ibmvfc_reset_host(vhost);
2029 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2033 vhost->aborting_passthru = 1;
2034 evt = ibmvfc_get_event(&vhost->crq);
2035 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
2038 memset(tmf, 0, sizeof(*tmf));
2039 tmf->common.version = cpu_to_be32(1);
2040 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2041 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2042 tmf->scsi_id = cpu_to_be64(port_id);
2043 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
2044 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
2045 rc = ibmvfc_send_event(evt, vhost, default_timeout);
2048 vhost->aborting_passthru = 0;
2049 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
2052 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
2055 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2062 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
2063 * @vhost: struct ibmvfc_host to send command
2064 * @port_id: port ID to send command
2067 * 0 on success / other on failure
2069 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
2071 struct ibmvfc_port_login *plogi;
2072 struct ibmvfc_target *tgt;
2073 struct ibmvfc_event *evt;
2074 union ibmvfc_iu rsp_iu;
2075 unsigned long flags;
2076 int rc = 0, issue_login = 1;
2079 spin_lock_irqsave(vhost->host->host_lock, flags);
2080 list_for_each_entry(tgt, &vhost->targets, queue) {
2081 if (tgt->scsi_id == port_id) {
2089 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
2092 evt = ibmvfc_get_event(&vhost->crq);
2093 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2094 plogi = &evt->iu.plogi;
2095 memset(plogi, 0, sizeof(*plogi));
2096 plogi->common.version = cpu_to_be32(1);
2097 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
2098 plogi->common.length = cpu_to_be16(sizeof(*plogi));
2099 plogi->scsi_id = cpu_to_be64(port_id);
2100 evt->sync_iu = &rsp_iu;
2101 init_completion(&evt->comp);
2103 rc = ibmvfc_send_event(evt, vhost, default_timeout);
2104 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2109 wait_for_completion(&evt->comp);
2111 if (rsp_iu.plogi.common.status)
2114 spin_lock_irqsave(vhost->host->host_lock, flags);
2115 ibmvfc_free_event(evt);
2117 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2123 * ibmvfc_bsg_request - Handle a BSG request
2124 * @job: struct bsg_job to be executed
2127 * 0 on success / other on failure
2129 static int ibmvfc_bsg_request(struct bsg_job *job)
2131 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
2132 struct fc_rport *rport = fc_bsg_to_rport(job);
2133 struct ibmvfc_passthru_mad *mad;
2134 struct ibmvfc_event *evt;
2135 union ibmvfc_iu rsp_iu;
2136 unsigned long flags, port_id = -1;
2137 struct fc_bsg_request *bsg_request = job->request;
2138 struct fc_bsg_reply *bsg_reply = job->reply;
2139 unsigned int code = bsg_request->msgcode;
2140 int rc = 0, req_seg, rsp_seg, issue_login = 0;
2141 u32 fc_flags, rsp_len;
2144 bsg_reply->reply_payload_rcv_len = 0;
2146 port_id = rport->port_id;
2149 case FC_BSG_HST_ELS_NOLOGIN:
2150 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
2151 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
2152 bsg_request->rqst_data.h_els.port_id[2];
2154 case FC_BSG_RPT_ELS:
2155 fc_flags = IBMVFC_FC_ELS;
2159 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
2160 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
2161 bsg_request->rqst_data.h_ct.port_id[2];
2164 fc_flags = IBMVFC_FC_CT_IU;
2172 if (!mutex_trylock(&vhost->passthru_mutex))
2175 job->dd_data = (void *)port_id;
2176 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
2177 job->request_payload.sg_cnt, DMA_TO_DEVICE);
2180 mutex_unlock(&vhost->passthru_mutex);
2184 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
2185 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
2188 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
2189 job->request_payload.sg_cnt, DMA_TO_DEVICE);
2190 mutex_unlock(&vhost->passthru_mutex);
2194 if (req_seg > 1 || rsp_seg > 1) {
2200 rc = ibmvfc_bsg_plogi(vhost, port_id);
2202 spin_lock_irqsave(vhost->host->host_lock, flags);
2204 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
2205 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
2206 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2210 evt = ibmvfc_get_event(&vhost->crq);
2211 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2212 mad = &evt->iu.passthru;
2214 memset(mad, 0, sizeof(*mad));
2215 mad->common.version = cpu_to_be32(1);
2216 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
2217 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
2219 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
2220 offsetof(struct ibmvfc_passthru_mad, iu));
2221 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
2223 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
2224 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
2225 mad->iu.flags = cpu_to_be32(fc_flags);
2226 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
2228 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
2229 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
2230 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
2231 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
2232 mad->iu.scsi_id = cpu_to_be64(port_id);
2233 mad->iu.tag = cpu_to_be64((u64)evt);
2234 rsp_len = be32_to_cpu(mad->iu.rsp.len);
2236 evt->sync_iu = &rsp_iu;
2237 init_completion(&evt->comp);
2238 rc = ibmvfc_send_event(evt, vhost, 0);
2239 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2246 wait_for_completion(&evt->comp);
2248 if (rsp_iu.passthru.common.status)
2251 bsg_reply->reply_payload_rcv_len = rsp_len;
2253 spin_lock_irqsave(vhost->host->host_lock, flags);
2254 ibmvfc_free_event(evt);
2255 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2256 bsg_reply->result = rc;
2257 bsg_job_done(job, bsg_reply->result,
2258 bsg_reply->reply_payload_rcv_len);
2261 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
2262 job->request_payload.sg_cnt, DMA_TO_DEVICE);
2263 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
2264 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
2265 mutex_unlock(&vhost->passthru_mutex);
2271 * ibmvfc_reset_device - Reset the device with the specified reset type
2272 * @sdev: scsi device to reset
2274 * @desc: reset type description for log messages
2277 * 0 on success / other on failure
2279 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
2281 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2282 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2283 struct ibmvfc_cmd *tmf;
2284 struct ibmvfc_event *evt = NULL;
2285 union ibmvfc_iu rsp_iu;
2286 struct ibmvfc_fcp_cmd_iu *iu;
2287 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd);
2288 int rsp_rc = -EBUSY;
2289 unsigned long flags;
2292 spin_lock_irqsave(vhost->host->host_lock, flags);
2293 if (vhost->state == IBMVFC_ACTIVE) {
2294 if (vhost->using_channels)
2295 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]);
2297 evt = ibmvfc_get_event(&vhost->crq);
2299 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2300 tmf = ibmvfc_init_vfc_cmd(evt, sdev);
2301 iu = ibmvfc_get_fcp_iu(vhost, tmf);
2303 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2304 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
2305 tmf->target_wwpn = cpu_to_be64(rport->port_name);
2306 iu->tmf_flags = type;
2307 evt->sync_iu = &rsp_iu;
2309 init_completion(&evt->comp);
2310 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2312 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2315 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2320 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2321 wait_for_completion(&evt->comp);
2323 if (rsp_iu.cmd.status)
2324 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd);
2327 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2328 rsp_code = fc_rsp->data.info.rsp_code;
2330 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2331 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2332 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2333 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
2334 fc_rsp->scsi_status);
2337 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2339 spin_lock_irqsave(vhost->host->host_lock, flags);
2340 ibmvfc_free_event(evt);
2341 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2346 * ibmvfc_match_rport - Match function for specified remote port
2347 * @evt: ibmvfc event struct
2348 * @rport: device to match
2351 * 1 if event matches rport / 0 if event does not match rport
2353 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
2355 struct fc_rport *cmd_rport;
2358 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2359 if (cmd_rport == rport)
2366 * ibmvfc_match_target - Match function for specified target
2367 * @evt: ibmvfc event struct
2368 * @device: device to match (starget)
2371 * 1 if event matches starget / 0 if event does not match starget
2373 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2375 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2381 * ibmvfc_match_lun - Match function for specified LUN
2382 * @evt: ibmvfc event struct
2383 * @device: device to match (sdev)
2386 * 1 if event matches sdev / 0 if event does not match sdev
2388 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2390 if (evt->cmnd && evt->cmnd->device == device)
2396 * ibmvfc_event_is_free - Check if event is free or not
2397 * @evt: ibmvfc event struct
2402 static bool ibmvfc_event_is_free(struct ibmvfc_event *evt)
2404 struct ibmvfc_event *loop_evt;
2406 list_for_each_entry(loop_evt, &evt->queue->free, queue_list)
2407 if (loop_evt == evt)
2414 * ibmvfc_wait_for_ops - Wait for ops to complete
2415 * @vhost: ibmvfc host struct
2416 * @device: device to match (starget or sdev)
2417 * @match: match function
2422 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2423 int (*match) (struct ibmvfc_event *, void *))
2425 struct ibmvfc_event *evt;
2426 DECLARE_COMPLETION_ONSTACK(comp);
2427 int wait, i, q_index, q_size;
2428 unsigned long flags;
2429 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2430 struct ibmvfc_queue *queues;
2433 if (vhost->mq_enabled && vhost->using_channels) {
2434 queues = vhost->scsi_scrqs.scrqs;
2435 q_size = vhost->scsi_scrqs.active_queues;
2437 queues = &vhost->crq;
2443 spin_lock_irqsave(vhost->host->host_lock, flags);
2444 for (q_index = 0; q_index < q_size; q_index++) {
2445 spin_lock(&queues[q_index].l_lock);
2446 for (i = 0; i < queues[q_index].evt_pool.size; i++) {
2447 evt = &queues[q_index].evt_pool.events[i];
2448 if (!ibmvfc_event_is_free(evt)) {
2449 if (match(evt, device)) {
2450 evt->eh_comp = ∁
2455 spin_unlock(&queues[q_index].l_lock);
2457 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2460 timeout = wait_for_completion_timeout(&comp, timeout);
2464 spin_lock_irqsave(vhost->host->host_lock, flags);
2465 for (q_index = 0; q_index < q_size; q_index++) {
2466 spin_lock(&queues[q_index].l_lock);
2467 for (i = 0; i < queues[q_index].evt_pool.size; i++) {
2468 evt = &queues[q_index].evt_pool.events[i];
2469 if (!ibmvfc_event_is_free(evt)) {
2470 if (match(evt, device)) {
2471 evt->eh_comp = NULL;
2476 spin_unlock(&queues[q_index].l_lock);
2478 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2480 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2482 return wait ? FAILED : SUCCESS;
2491 static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue,
2492 struct scsi_device *sdev,
2495 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2496 struct scsi_target *starget = scsi_target(sdev);
2497 struct fc_rport *rport = starget_to_rport(starget);
2498 struct ibmvfc_event *evt;
2499 struct ibmvfc_tmf *tmf;
2501 evt = ibmvfc_get_event(queue);
2502 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2505 memset(tmf, 0, sizeof(*tmf));
2506 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
2507 tmf->common.version = cpu_to_be32(2);
2508 tmf->target_wwpn = cpu_to_be64(rport->port_name);
2510 tmf->common.version = cpu_to_be32(1);
2512 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2513 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2514 tmf->scsi_id = cpu_to_be64(rport->port_id);
2515 int_to_scsilun(sdev->lun, &tmf->lun);
2516 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS))
2517 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
2518 if (vhost->state == IBMVFC_ACTIVE)
2519 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
2521 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2522 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2523 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
2525 init_completion(&evt->comp);
2530 static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type)
2532 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2533 struct ibmvfc_event *evt, *found_evt, *temp;
2534 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs;
2535 unsigned long flags;
2542 spin_lock_irqsave(vhost->host->host_lock, flags);
2543 num_hwq = vhost->scsi_scrqs.active_queues;
2544 for (i = 0; i < num_hwq; i++) {
2545 spin_lock(queues[i].q_lock);
2546 spin_lock(&queues[i].l_lock);
2548 list_for_each_entry(evt, &queues[i].sent, queue_list) {
2549 if (evt->cmnd && evt->cmnd->device == sdev) {
2554 spin_unlock(&queues[i].l_lock);
2556 if (found_evt && vhost->logged_in) {
2557 evt = ibmvfc_init_tmf(&queues[i], sdev, type);
2558 evt->sync_iu = &queues[i].cancel_rsp;
2559 ibmvfc_send_event(evt, vhost, default_timeout);
2560 list_add_tail(&evt->cancel, &cancelq);
2563 spin_unlock(queues[i].q_lock);
2565 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2567 if (list_empty(&cancelq)) {
2568 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2569 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2573 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2575 list_for_each_entry_safe(evt, temp, &cancelq, cancel) {
2576 wait_for_completion(&evt->comp);
2577 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status);
2578 list_del(&evt->cancel);
2579 ibmvfc_free_event(evt);
2581 if (status != IBMVFC_MAD_SUCCESS) {
2582 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2584 case IBMVFC_MAD_DRIVER_FAILED:
2585 case IBMVFC_MAD_CRQ_ERROR:
2586 /* Host adapter most likely going through reset, return success to
2587 * the caller will wait for the command being cancelled to get returned
2600 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2605 static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type)
2607 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2608 struct ibmvfc_event *evt, *found_evt;
2609 union ibmvfc_iu rsp;
2610 int rsp_rc = -EBUSY;
2611 unsigned long flags;
2616 spin_lock_irqsave(vhost->host->host_lock, flags);
2617 spin_lock(&vhost->crq.l_lock);
2618 list_for_each_entry(evt, &vhost->crq.sent, queue_list) {
2619 if (evt->cmnd && evt->cmnd->device == sdev) {
2624 spin_unlock(&vhost->crq.l_lock);
2627 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2628 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2629 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2633 if (vhost->logged_in) {
2634 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type);
2635 evt->sync_iu = &rsp;
2636 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2639 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2642 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2643 /* If failure is received, the host adapter is most likely going
2644 through reset, return success so the caller will wait for the command
2645 being cancelled to get returned */
2649 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2651 wait_for_completion(&evt->comp);
2652 status = be16_to_cpu(rsp.mad_common.status);
2653 spin_lock_irqsave(vhost->host->host_lock, flags);
2654 ibmvfc_free_event(evt);
2655 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2657 if (status != IBMVFC_MAD_SUCCESS) {
2658 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2660 case IBMVFC_MAD_DRIVER_FAILED:
2661 case IBMVFC_MAD_CRQ_ERROR:
2662 /* Host adapter most likely going through reset, return success to
2663 the caller will wait for the command being cancelled to get returned */
2670 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2675 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2676 * @sdev: scsi device to cancel commands
2677 * @type: type of error recovery being performed
2679 * This sends a cancel to the VIOS for the specified device. This does
2680 * NOT send any abort to the actual device. That must be done separately.
2683 * 0 on success / other on failure
2685 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2687 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2689 if (vhost->mq_enabled && vhost->using_channels)
2690 return ibmvfc_cancel_all_mq(sdev, type);
2692 return ibmvfc_cancel_all_sq(sdev, type);
2696 * ibmvfc_match_key - Match function for specified cancel key
2697 * @evt: ibmvfc event struct
2698 * @key: cancel key to match
2701 * 1 if event matches key / 0 if event does not match key
2703 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
2705 unsigned long cancel_key = (unsigned long)key;
2707 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
2708 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
2714 * ibmvfc_match_evt - Match function for specified event
2715 * @evt: ibmvfc event struct
2716 * @match: event to match
2719 * 1 if event matches key / 0 if event does not match key
2721 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2729 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2730 * @sdev: scsi device to abort commands
2732 * This sends an Abort Task Set to the VIOS for the specified device. This does
2733 * NOT send any cancel to the VIOS. That must be done separately.
2736 * 0 on success / other on failure
2738 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2740 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2741 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2742 struct ibmvfc_cmd *tmf;
2743 struct ibmvfc_event *evt, *found_evt;
2744 union ibmvfc_iu rsp_iu;
2745 struct ibmvfc_fcp_cmd_iu *iu;
2746 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd);
2747 int rc, rsp_rc = -EBUSY;
2748 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2752 spin_lock_irqsave(vhost->host->host_lock, flags);
2753 spin_lock(&vhost->crq.l_lock);
2754 list_for_each_entry(evt, &vhost->crq.sent, queue_list) {
2755 if (evt->cmnd && evt->cmnd->device == sdev) {
2760 spin_unlock(&vhost->crq.l_lock);
2763 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2764 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2765 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2769 if (vhost->state == IBMVFC_ACTIVE) {
2770 evt = ibmvfc_get_event(&vhost->crq);
2771 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2772 tmf = ibmvfc_init_vfc_cmd(evt, sdev);
2773 iu = ibmvfc_get_fcp_iu(vhost, tmf);
2775 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
2776 tmf->target_wwpn = cpu_to_be64(rport->port_name);
2777 iu->tmf_flags = IBMVFC_ABORT_TASK_SET;
2778 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2779 evt->sync_iu = &rsp_iu;
2781 tmf->correlation = cpu_to_be64((u64)evt);
2783 init_completion(&evt->comp);
2784 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2787 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2790 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2794 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2795 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2798 rc = ibmvfc_cancel_all(sdev, 0);
2800 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2806 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2807 ibmvfc_reset_host(vhost);
2809 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2814 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2815 if (rc != SUCCESS) {
2816 spin_lock_irqsave(vhost->host->host_lock, flags);
2817 ibmvfc_hard_reset_host(vhost);
2818 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2826 if (rsp_iu.cmd.status)
2827 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd);
2830 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2831 rsp_code = fc_rsp->data.info.rsp_code;
2833 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2834 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2835 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2836 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
2837 fc_rsp->scsi_status);
2840 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2843 spin_lock_irqsave(vhost->host->host_lock, flags);
2844 ibmvfc_free_event(evt);
2845 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2850 * ibmvfc_eh_abort_handler - Abort a command
2851 * @cmd: scsi command to abort
2854 * SUCCESS / FAST_IO_FAIL / FAILED
2856 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2858 struct scsi_device *sdev = cmd->device;
2859 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2860 int cancel_rc, block_rc;
2864 block_rc = fc_block_scsi_eh(cmd);
2865 ibmvfc_wait_while_resetting(vhost);
2866 if (block_rc != FAST_IO_FAIL) {
2867 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2868 ibmvfc_abort_task_set(sdev);
2870 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2873 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2875 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2883 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2884 * @cmd: scsi command struct
2887 * SUCCESS / FAST_IO_FAIL / FAILED
2889 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2891 struct scsi_device *sdev = cmd->device;
2892 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2893 int cancel_rc, block_rc, reset_rc = 0;
2897 block_rc = fc_block_scsi_eh(cmd);
2898 ibmvfc_wait_while_resetting(vhost);
2899 if (block_rc != FAST_IO_FAIL) {
2900 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2901 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2903 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2905 if (!cancel_rc && !reset_rc)
2906 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2908 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2916 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2917 * @sdev: scsi device struct
2918 * @data: return code
2921 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2923 unsigned long *rc = data;
2924 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2928 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2929 * @sdev: scsi device struct
2930 * @data: return code
2933 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2935 unsigned long *rc = data;
2936 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2940 * ibmvfc_eh_target_reset_handler - Reset the target
2941 * @cmd: scsi command struct
2944 * SUCCESS / FAST_IO_FAIL / FAILED
2946 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2948 struct scsi_device *sdev = cmd->device;
2949 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2950 struct scsi_target *starget = scsi_target(sdev);
2954 unsigned long cancel_rc = 0;
2957 block_rc = fc_block_scsi_eh(cmd);
2958 ibmvfc_wait_while_resetting(vhost);
2959 if (block_rc != FAST_IO_FAIL) {
2960 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2961 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2963 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
2965 if (!cancel_rc && !reset_rc)
2966 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2968 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2976 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2977 * @cmd: struct scsi_cmnd having problems
2980 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2983 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2985 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2986 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2988 return rc ? FAILED : SUCCESS;
2992 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2993 * @rport: rport struct
2998 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
3000 struct Scsi_Host *shost = rport_to_shost(rport);
3001 struct ibmvfc_host *vhost = shost_priv(shost);
3002 struct fc_rport *dev_rport;
3003 struct scsi_device *sdev;
3004 struct ibmvfc_target *tgt;
3005 unsigned long rc, flags;
3009 shost_for_each_device(sdev, shost) {
3010 dev_rport = starget_to_rport(scsi_target(sdev));
3011 if (dev_rport != rport)
3013 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
3016 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
3019 ibmvfc_issue_fc_host_lip(shost);
3021 spin_lock_irqsave(shost->host_lock, flags);
3023 list_for_each_entry(tgt, &vhost->targets, queue) {
3024 if (tgt->scsi_id == rport->port_id) {
3030 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) {
3032 * If we get here, that means we previously attempted to send
3033 * an implicit logout to the target but it failed, most likely
3034 * due to I/O being pending, so we need to send it again
3036 ibmvfc_del_tgt(tgt);
3037 ibmvfc_reinit_host(vhost);
3040 spin_unlock_irqrestore(shost->host_lock, flags);
3044 static const struct ibmvfc_async_desc ae_desc [] = {
3045 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3046 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3047 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3048 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3049 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3050 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
3051 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
3052 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
3053 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
3054 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
3055 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
3056 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
3057 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
3060 static const struct ibmvfc_async_desc unknown_ae = {
3061 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
3065 * ibmvfc_get_ae_desc - Get text description for async event
3069 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
3073 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
3074 if (ae_desc[i].ae == ae)
3080 static const struct {
3081 enum ibmvfc_ae_link_state state;
3084 { IBMVFC_AE_LS_LINK_UP, " link up" },
3085 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
3086 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
3087 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
3091 * ibmvfc_get_link_state - Get text description for link state
3092 * @state: link state
3095 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
3099 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
3100 if (link_desc[i].state == state)
3101 return link_desc[i].desc;
3107 * ibmvfc_handle_async - Handle an async event from the adapter
3108 * @crq: crq to process
3109 * @vhost: ibmvfc host struct
3112 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
3113 struct ibmvfc_host *vhost)
3115 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
3116 struct ibmvfc_target *tgt;
3118 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
3119 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
3120 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
3121 ibmvfc_get_link_state(crq->link_state));
3123 switch (be64_to_cpu(crq->event)) {
3124 case IBMVFC_AE_RESUME:
3125 switch (crq->link_state) {
3126 case IBMVFC_AE_LS_LINK_DOWN:
3127 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3129 case IBMVFC_AE_LS_LINK_DEAD:
3130 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3132 case IBMVFC_AE_LS_LINK_UP:
3133 case IBMVFC_AE_LS_LINK_BOUNCED:
3135 vhost->events_to_log |= IBMVFC_AE_LINKUP;
3136 vhost->delay_init = 1;
3137 __ibmvfc_reset_host(vhost);
3142 case IBMVFC_AE_LINK_UP:
3143 vhost->events_to_log |= IBMVFC_AE_LINKUP;
3144 vhost->delay_init = 1;
3145 __ibmvfc_reset_host(vhost);
3147 case IBMVFC_AE_SCN_FABRIC:
3148 case IBMVFC_AE_SCN_DOMAIN:
3149 vhost->events_to_log |= IBMVFC_AE_RSCN;
3150 if (vhost->state < IBMVFC_HALTED) {
3151 vhost->delay_init = 1;
3152 __ibmvfc_reset_host(vhost);
3155 case IBMVFC_AE_SCN_NPORT:
3156 case IBMVFC_AE_SCN_GROUP:
3157 vhost->events_to_log |= IBMVFC_AE_RSCN;
3158 ibmvfc_reinit_host(vhost);
3160 case IBMVFC_AE_ELS_LOGO:
3161 case IBMVFC_AE_ELS_PRLO:
3162 case IBMVFC_AE_ELS_PLOGI:
3163 list_for_each_entry(tgt, &vhost->targets, queue) {
3164 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
3166 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
3168 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
3170 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
3172 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
3174 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
3175 ibmvfc_del_tgt(tgt);
3176 ibmvfc_reinit_host(vhost);
3180 case IBMVFC_AE_LINK_DOWN:
3181 case IBMVFC_AE_ADAPTER_FAILED:
3182 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3184 case IBMVFC_AE_LINK_DEAD:
3185 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3187 case IBMVFC_AE_HALT:
3188 ibmvfc_link_down(vhost, IBMVFC_HALTED);
3191 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
3197 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
3198 * @crq: Command/Response queue
3199 * @vhost: ibmvfc host struct
3200 * @evt_doneq: Event done queue
3203 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost,
3204 struct list_head *evt_doneq)
3207 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
3209 switch (crq->valid) {
3210 case IBMVFC_CRQ_INIT_RSP:
3211 switch (crq->format) {
3212 case IBMVFC_CRQ_INIT:
3213 dev_info(vhost->dev, "Partner initialized\n");
3214 /* Send back a response */
3215 rc = ibmvfc_send_crq_init_complete(vhost);
3217 ibmvfc_init_host(vhost);
3219 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
3221 case IBMVFC_CRQ_INIT_COMPLETE:
3222 dev_info(vhost->dev, "Partner initialization complete\n");
3223 ibmvfc_init_host(vhost);
3226 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
3229 case IBMVFC_CRQ_XPORT_EVENT:
3230 vhost->state = IBMVFC_NO_CRQ;
3231 vhost->logged_in = 0;
3232 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3233 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
3234 /* We need to re-setup the interpartition connection */
3235 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n");
3236 vhost->client_migrated = 1;
3237 ibmvfc_purge_requests(vhost, DID_REQUEUE);
3238 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3239 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
3240 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) {
3241 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format);
3242 ibmvfc_purge_requests(vhost, DID_ERROR);
3243 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3244 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
3246 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format);
3249 case IBMVFC_CRQ_CMD_RSP:
3252 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
3256 if (crq->format == IBMVFC_ASYNC_EVENT)
3259 /* The only kind of payload CRQs we should get are responses to
3260 * things we send. Make sure this response is to something we
3263 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) {
3264 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
3269 if (unlikely(atomic_dec_if_positive(&evt->active))) {
3270 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
3275 spin_lock(&evt->queue->l_lock);
3276 list_move_tail(&evt->queue_list, evt_doneq);
3277 spin_unlock(&evt->queue->l_lock);
3281 * ibmvfc_scan_finished - Check if the device scan is done.
3282 * @shost: scsi host struct
3283 * @time: current elapsed time
3286 * 0 if scan is not done / 1 if scan is done
3288 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
3290 unsigned long flags;
3291 struct ibmvfc_host *vhost = shost_priv(shost);
3294 spin_lock_irqsave(shost->host_lock, flags);
3295 if (time >= (init_timeout * HZ)) {
3296 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
3297 "continuing initialization\n", init_timeout);
3301 if (vhost->scan_complete)
3303 spin_unlock_irqrestore(shost->host_lock, flags);
3308 * ibmvfc_slave_alloc - Setup the device's task set value
3309 * @sdev: struct scsi_device device to configure
3311 * Set the device's task set value so that error handling works as
3315 * 0 on success / -ENXIO if device does not exist
3317 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
3319 struct Scsi_Host *shost = sdev->host;
3320 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3321 struct ibmvfc_host *vhost = shost_priv(shost);
3322 unsigned long flags = 0;
3324 if (!rport || fc_remote_port_chkready(rport))
3327 spin_lock_irqsave(shost->host_lock, flags);
3328 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
3329 spin_unlock_irqrestore(shost->host_lock, flags);
3334 * ibmvfc_target_alloc - Setup the target's task set value
3335 * @starget: struct scsi_target
3337 * Set the target's task set value so that error handling works as
3341 * 0 on success / -ENXIO if device does not exist
3343 static int ibmvfc_target_alloc(struct scsi_target *starget)
3345 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
3346 struct ibmvfc_host *vhost = shost_priv(shost);
3347 unsigned long flags = 0;
3349 spin_lock_irqsave(shost->host_lock, flags);
3350 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
3351 spin_unlock_irqrestore(shost->host_lock, flags);
3356 * ibmvfc_slave_configure - Configure the device
3357 * @sdev: struct scsi_device device to configure
3359 * Enable allow_restart for a device if it is a disk. Adjust the
3360 * queue_depth here also.
3365 static int ibmvfc_slave_configure(struct scsi_device *sdev)
3367 struct Scsi_Host *shost = sdev->host;
3368 unsigned long flags = 0;
3370 spin_lock_irqsave(shost->host_lock, flags);
3371 if (sdev->type == TYPE_DISK) {
3372 sdev->allow_restart = 1;
3373 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ);
3375 spin_unlock_irqrestore(shost->host_lock, flags);
3380 * ibmvfc_change_queue_depth - Change the device's queue depth
3381 * @sdev: scsi device struct
3382 * @qdepth: depth to set
3387 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
3389 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
3390 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
3392 return scsi_change_queue_depth(sdev, qdepth);
3395 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
3396 struct device_attribute *attr, char *buf)
3398 struct Scsi_Host *shost = class_to_shost(dev);
3399 struct ibmvfc_host *vhost = shost_priv(shost);
3401 return snprintf(buf, PAGE_SIZE, "%s\n",
3402 vhost->login_buf->resp.partition_name);
3405 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
3406 struct device_attribute *attr, char *buf)
3408 struct Scsi_Host *shost = class_to_shost(dev);
3409 struct ibmvfc_host *vhost = shost_priv(shost);
3411 return snprintf(buf, PAGE_SIZE, "%s\n",
3412 vhost->login_buf->resp.device_name);
3415 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
3416 struct device_attribute *attr, char *buf)
3418 struct Scsi_Host *shost = class_to_shost(dev);
3419 struct ibmvfc_host *vhost = shost_priv(shost);
3421 return snprintf(buf, PAGE_SIZE, "%s\n",
3422 vhost->login_buf->resp.port_loc_code);
3425 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
3426 struct device_attribute *attr, char *buf)
3428 struct Scsi_Host *shost = class_to_shost(dev);
3429 struct ibmvfc_host *vhost = shost_priv(shost);
3431 return snprintf(buf, PAGE_SIZE, "%s\n",
3432 vhost->login_buf->resp.drc_name);
3435 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
3436 struct device_attribute *attr, char *buf)
3438 struct Scsi_Host *shost = class_to_shost(dev);
3439 struct ibmvfc_host *vhost = shost_priv(shost);
3440 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version));
3443 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
3444 struct device_attribute *attr, char *buf)
3446 struct Scsi_Host *shost = class_to_shost(dev);
3447 struct ibmvfc_host *vhost = shost_priv(shost);
3448 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities));
3452 * ibmvfc_show_log_level - Show the adapter's error logging level
3453 * @dev: class device struct
3458 * number of bytes printed to buffer
3460 static ssize_t ibmvfc_show_log_level(struct device *dev,
3461 struct device_attribute *attr, char *buf)
3463 struct Scsi_Host *shost = class_to_shost(dev);
3464 struct ibmvfc_host *vhost = shost_priv(shost);
3465 unsigned long flags = 0;
3468 spin_lock_irqsave(shost->host_lock, flags);
3469 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
3470 spin_unlock_irqrestore(shost->host_lock, flags);
3475 * ibmvfc_store_log_level - Change the adapter's error logging level
3476 * @dev: class device struct
3479 * @count: buffer size
3482 * number of bytes printed to buffer
3484 static ssize_t ibmvfc_store_log_level(struct device *dev,
3485 struct device_attribute *attr,
3486 const char *buf, size_t count)
3488 struct Scsi_Host *shost = class_to_shost(dev);
3489 struct ibmvfc_host *vhost = shost_priv(shost);
3490 unsigned long flags = 0;
3492 spin_lock_irqsave(shost->host_lock, flags);
3493 vhost->log_level = simple_strtoul(buf, NULL, 10);
3494 spin_unlock_irqrestore(shost->host_lock, flags);
3498 static ssize_t ibmvfc_show_scsi_channels(struct device *dev,
3499 struct device_attribute *attr, char *buf)
3501 struct Scsi_Host *shost = class_to_shost(dev);
3502 struct ibmvfc_host *vhost = shost_priv(shost);
3503 unsigned long flags = 0;
3506 spin_lock_irqsave(shost->host_lock, flags);
3507 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels);
3508 spin_unlock_irqrestore(shost->host_lock, flags);
3512 static ssize_t ibmvfc_store_scsi_channels(struct device *dev,
3513 struct device_attribute *attr,
3514 const char *buf, size_t count)
3516 struct Scsi_Host *shost = class_to_shost(dev);
3517 struct ibmvfc_host *vhost = shost_priv(shost);
3518 unsigned long flags = 0;
3519 unsigned int channels;
3521 spin_lock_irqsave(shost->host_lock, flags);
3522 channels = simple_strtoul(buf, NULL, 10);
3523 vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues);
3524 ibmvfc_hard_reset_host(vhost);
3525 spin_unlock_irqrestore(shost->host_lock, flags);
3529 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3530 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3531 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3532 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3533 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
3534 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
3535 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3536 ibmvfc_show_log_level, ibmvfc_store_log_level);
3537 static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR,
3538 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels);
3540 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3542 * ibmvfc_read_trace - Dump the adapter trace
3543 * @filp: open sysfs file
3544 * @kobj: kobject struct
3545 * @bin_attr: bin_attribute struct
3548 * @count: buffer size
3551 * number of bytes printed to buffer
3553 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
3554 struct bin_attribute *bin_attr,
3555 char *buf, loff_t off, size_t count)
3557 struct device *dev = kobj_to_dev(kobj);
3558 struct Scsi_Host *shost = class_to_shost(dev);
3559 struct ibmvfc_host *vhost = shost_priv(shost);
3560 unsigned long flags = 0;
3561 int size = IBMVFC_TRACE_SIZE;
3562 char *src = (char *)vhost->trace;
3566 if (off + count > size) {
3571 spin_lock_irqsave(shost->host_lock, flags);
3572 memcpy(buf, &src[off], count);
3573 spin_unlock_irqrestore(shost->host_lock, flags);
3577 static struct bin_attribute ibmvfc_trace_attr = {
3583 .read = ibmvfc_read_trace,
3587 static struct device_attribute *ibmvfc_attrs[] = {
3588 &dev_attr_partition_name,
3589 &dev_attr_device_name,
3590 &dev_attr_port_loc_code,
3592 &dev_attr_npiv_version,
3593 &dev_attr_capabilities,
3594 &dev_attr_log_level,
3595 &dev_attr_nr_scsi_channels,
3599 static struct scsi_host_template driver_template = {
3600 .module = THIS_MODULE,
3601 .name = "IBM POWER Virtual FC Adapter",
3602 .proc_name = IBMVFC_NAME,
3603 .queuecommand = ibmvfc_queuecommand,
3604 .eh_timed_out = fc_eh_timed_out,
3605 .eh_abort_handler = ibmvfc_eh_abort_handler,
3606 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3607 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3608 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3609 .slave_alloc = ibmvfc_slave_alloc,
3610 .slave_configure = ibmvfc_slave_configure,
3611 .target_alloc = ibmvfc_target_alloc,
3612 .scan_finished = ibmvfc_scan_finished,
3613 .change_queue_depth = ibmvfc_change_queue_depth,
3615 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3617 .sg_tablesize = SG_ALL,
3618 .max_sectors = IBMVFC_MAX_SECTORS,
3619 .shost_attrs = ibmvfc_attrs,
3620 .track_queue_depth = 1,
3625 * ibmvfc_next_async_crq - Returns the next entry in async queue
3626 * @vhost: ibmvfc host struct
3629 * Pointer to next entry in queue / NULL if empty
3631 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3633 struct ibmvfc_queue *async_crq = &vhost->async_crq;
3634 struct ibmvfc_async_crq *crq;
3636 crq = &async_crq->msgs.async[async_crq->cur];
3637 if (crq->valid & 0x80) {
3638 if (++async_crq->cur == async_crq->size)
3648 * ibmvfc_next_crq - Returns the next entry in message queue
3649 * @vhost: ibmvfc host struct
3652 * Pointer to next entry in queue / NULL if empty
3654 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3656 struct ibmvfc_queue *queue = &vhost->crq;
3657 struct ibmvfc_crq *crq;
3659 crq = &queue->msgs.crq[queue->cur];
3660 if (crq->valid & 0x80) {
3661 if (++queue->cur == queue->size)
3671 * ibmvfc_interrupt - Interrupt handler
3672 * @irq: number of irq to handle, not used
3673 * @dev_instance: ibmvfc_host that received interrupt
3678 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3680 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3681 unsigned long flags;
3683 spin_lock_irqsave(vhost->host->host_lock, flags);
3684 vio_disable_interrupts(to_vio_dev(vhost->dev));
3685 tasklet_schedule(&vhost->tasklet);
3686 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3691 * ibmvfc_tasklet - Interrupt handler tasklet
3692 * @data: ibmvfc host struct
3697 static void ibmvfc_tasklet(void *data)
3699 struct ibmvfc_host *vhost = data;
3700 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3701 struct ibmvfc_crq *crq;
3702 struct ibmvfc_async_crq *async;
3703 struct ibmvfc_event *evt, *temp;
3704 unsigned long flags;
3706 LIST_HEAD(evt_doneq);
3708 spin_lock_irqsave(vhost->host->host_lock, flags);
3709 spin_lock(vhost->crq.q_lock);
3711 /* Pull all the valid messages off the async CRQ */
3712 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3713 ibmvfc_handle_async(async, vhost);
3718 /* Pull all the valid messages off the CRQ */
3719 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3720 ibmvfc_handle_crq(crq, vhost, &evt_doneq);
3725 vio_enable_interrupts(vdev);
3726 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3727 vio_disable_interrupts(vdev);
3728 ibmvfc_handle_async(async, vhost);
3731 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3732 vio_disable_interrupts(vdev);
3733 ibmvfc_handle_crq(crq, vhost, &evt_doneq);
3740 spin_unlock(vhost->crq.q_lock);
3741 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3743 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) {
3744 del_timer(&evt->timer);
3745 list_del(&evt->queue_list);
3746 ibmvfc_trc_end(evt);
3751 static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable)
3753 struct device *dev = scrq->vhost->dev;
3754 struct vio_dev *vdev = to_vio_dev(dev);
3756 int irq_action = H_ENABLE_VIO_INTERRUPT;
3759 irq_action = H_DISABLE_VIO_INTERRUPT;
3761 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action,
3762 scrq->hw_irq, 0, 0);
3765 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n",
3766 enable ? "enable" : "disable", scrq->hwq_id, rc);
3771 static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost,
3772 struct list_head *evt_doneq)
3774 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
3776 switch (crq->valid) {
3777 case IBMVFC_CRQ_CMD_RSP:
3779 case IBMVFC_CRQ_XPORT_EVENT:
3782 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid);
3786 /* The only kind of payload CRQs we should get are responses to
3787 * things we send. Make sure this response is to something we
3790 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) {
3791 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
3796 if (unlikely(atomic_dec_if_positive(&evt->active))) {
3797 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
3802 spin_lock(&evt->queue->l_lock);
3803 list_move_tail(&evt->queue_list, evt_doneq);
3804 spin_unlock(&evt->queue->l_lock);
3807 static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq)
3809 struct ibmvfc_crq *crq;
3811 crq = &scrq->msgs.scrq[scrq->cur].crq;
3812 if (crq->valid & 0x80) {
3813 if (++scrq->cur == scrq->size)
3822 static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq)
3824 struct ibmvfc_crq *crq;
3825 struct ibmvfc_event *evt, *temp;
3826 unsigned long flags;
3828 LIST_HEAD(evt_doneq);
3830 spin_lock_irqsave(scrq->q_lock, flags);
3832 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) {
3833 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq);
3838 ibmvfc_toggle_scrq_irq(scrq, 1);
3839 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) {
3840 ibmvfc_toggle_scrq_irq(scrq, 0);
3841 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq);
3847 spin_unlock_irqrestore(scrq->q_lock, flags);
3849 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) {
3850 del_timer(&evt->timer);
3851 list_del(&evt->queue_list);
3852 ibmvfc_trc_end(evt);
3857 static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance)
3859 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance;
3861 ibmvfc_toggle_scrq_irq(scrq, 0);
3862 ibmvfc_drain_sub_crq(scrq);
3868 * ibmvfc_init_tgt - Set the next init job step for the target
3869 * @tgt: ibmvfc target struct
3870 * @job_step: job step to perform
3873 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3874 void (*job_step) (struct ibmvfc_target *))
3876 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT))
3877 tgt->job_step = job_step;
3878 wake_up(&tgt->vhost->work_wait_q);
3882 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3883 * @tgt: ibmvfc target struct
3884 * @job_step: initialization job step
3886 * Returns: 1 if step will be retried / 0 if not
3889 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3890 void (*job_step) (struct ibmvfc_target *))
3892 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3893 ibmvfc_del_tgt(tgt);
3894 wake_up(&tgt->vhost->work_wait_q);
3897 ibmvfc_init_tgt(tgt, job_step);
3901 /* Defined in FC-LS */
3902 static const struct {
3919 * ibmvfc_get_prli_rsp - Find PRLI response index
3920 * @flags: PRLI response flags
3923 static int ibmvfc_get_prli_rsp(u16 flags)
3926 int code = (flags & 0x0f00) >> 8;
3928 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3929 if (prli_rsp[i].code == code)
3936 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3937 * @evt: ibmvfc event struct
3940 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3942 struct ibmvfc_target *tgt = evt->tgt;
3943 struct ibmvfc_host *vhost = evt->vhost;
3944 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3945 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3946 u32 status = be16_to_cpu(rsp->common.status);
3947 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3949 vhost->discovery_threads--;
3950 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3952 case IBMVFC_MAD_SUCCESS:
3953 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3954 parms->type, parms->flags, parms->service_parms);
3956 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3957 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
3958 if (prli_rsp[index].logged_in) {
3959 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
3960 tgt->need_login = 0;
3962 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
3963 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3964 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
3965 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3968 ibmvfc_del_tgt(tgt);
3969 } else if (prli_rsp[index].retry)
3970 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3972 ibmvfc_del_tgt(tgt);
3974 ibmvfc_del_tgt(tgt);
3976 case IBMVFC_MAD_DRIVER_FAILED:
3978 case IBMVFC_MAD_CRQ_ERROR:
3979 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3981 case IBMVFC_MAD_FAILED:
3983 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3984 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
3985 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3986 else if (tgt->logo_rcvd)
3987 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3988 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3989 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3991 ibmvfc_del_tgt(tgt);
3993 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3994 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3995 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status);
3999 kref_put(&tgt->kref, ibmvfc_release_tgt);
4000 ibmvfc_free_event(evt);
4001 wake_up(&vhost->work_wait_q);
4005 * ibmvfc_tgt_send_prli - Send a process login
4006 * @tgt: ibmvfc target struct
4009 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
4011 struct ibmvfc_process_login *prli;
4012 struct ibmvfc_host *vhost = tgt->vhost;
4013 struct ibmvfc_event *evt;
4015 if (vhost->discovery_threads >= disc_threads)
4018 kref_get(&tgt->kref);
4019 evt = ibmvfc_get_event(&vhost->crq);
4020 vhost->discovery_threads++;
4021 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
4023 prli = &evt->iu.prli;
4024 memset(prli, 0, sizeof(*prli));
4025 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
4026 prli->common.version = cpu_to_be32(2);
4027 prli->target_wwpn = cpu_to_be64(tgt->wwpn);
4029 prli->common.version = cpu_to_be32(1);
4031 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
4032 prli->common.length = cpu_to_be16(sizeof(*prli));
4033 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
4035 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
4036 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
4037 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
4038 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
4041 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
4043 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4044 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4045 vhost->discovery_threads--;
4046 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4047 kref_put(&tgt->kref, ibmvfc_release_tgt);
4049 tgt_dbg(tgt, "Sent process login\n");
4053 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
4054 * @evt: ibmvfc event struct
4057 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
4059 struct ibmvfc_target *tgt = evt->tgt;
4060 struct ibmvfc_host *vhost = evt->vhost;
4061 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
4062 u32 status = be16_to_cpu(rsp->common.status);
4063 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4065 vhost->discovery_threads--;
4066 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4068 case IBMVFC_MAD_SUCCESS:
4069 tgt_dbg(tgt, "Port Login succeeded\n");
4070 if (tgt->ids.port_name &&
4071 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
4073 tgt_dbg(tgt, "Port re-init required\n");
4076 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
4077 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
4078 tgt->ids.port_id = tgt->scsi_id;
4079 memcpy(&tgt->service_parms, &rsp->service_parms,
4080 sizeof(tgt->service_parms));
4081 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
4082 sizeof(tgt->service_parms_change));
4083 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
4085 case IBMVFC_MAD_DRIVER_FAILED:
4087 case IBMVFC_MAD_CRQ_ERROR:
4088 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
4090 case IBMVFC_MAD_FAILED:
4092 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4093 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
4095 ibmvfc_del_tgt(tgt);
4097 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
4098 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4099 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
4100 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
4101 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status);
4105 kref_put(&tgt->kref, ibmvfc_release_tgt);
4106 ibmvfc_free_event(evt);
4107 wake_up(&vhost->work_wait_q);
4111 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
4112 * @tgt: ibmvfc target struct
4115 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
4117 struct ibmvfc_port_login *plogi;
4118 struct ibmvfc_host *vhost = tgt->vhost;
4119 struct ibmvfc_event *evt;
4121 if (vhost->discovery_threads >= disc_threads)
4124 kref_get(&tgt->kref);
4126 evt = ibmvfc_get_event(&vhost->crq);
4127 vhost->discovery_threads++;
4128 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4129 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
4131 plogi = &evt->iu.plogi;
4132 memset(plogi, 0, sizeof(*plogi));
4133 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
4134 plogi->common.version = cpu_to_be32(2);
4135 plogi->target_wwpn = cpu_to_be64(tgt->wwpn);
4137 plogi->common.version = cpu_to_be32(1);
4139 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
4140 plogi->common.length = cpu_to_be16(sizeof(*plogi));
4141 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
4143 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4144 vhost->discovery_threads--;
4145 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4146 kref_put(&tgt->kref, ibmvfc_release_tgt);
4148 tgt_dbg(tgt, "Sent port login\n");
4152 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
4153 * @evt: ibmvfc event struct
4156 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
4158 struct ibmvfc_target *tgt = evt->tgt;
4159 struct ibmvfc_host *vhost = evt->vhost;
4160 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
4161 u32 status = be16_to_cpu(rsp->common.status);
4163 vhost->discovery_threads--;
4164 ibmvfc_free_event(evt);
4165 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4168 case IBMVFC_MAD_SUCCESS:
4169 tgt_dbg(tgt, "Implicit Logout succeeded\n");
4171 case IBMVFC_MAD_DRIVER_FAILED:
4172 kref_put(&tgt->kref, ibmvfc_release_tgt);
4173 wake_up(&vhost->work_wait_q);
4175 case IBMVFC_MAD_FAILED:
4177 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
4181 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
4182 kref_put(&tgt->kref, ibmvfc_release_tgt);
4183 wake_up(&vhost->work_wait_q);
4187 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout
4188 * @tgt: ibmvfc target struct
4189 * @done: Routine to call when the event is responded to
4192 * Allocated and initialized ibmvfc_event struct
4194 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt,
4195 void (*done) (struct ibmvfc_event *))
4197 struct ibmvfc_implicit_logout *mad;
4198 struct ibmvfc_host *vhost = tgt->vhost;
4199 struct ibmvfc_event *evt;
4201 kref_get(&tgt->kref);
4202 evt = ibmvfc_get_event(&vhost->crq);
4203 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT);
4205 mad = &evt->iu.implicit_logout;
4206 memset(mad, 0, sizeof(*mad));
4207 mad->common.version = cpu_to_be32(1);
4208 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
4209 mad->common.length = cpu_to_be16(sizeof(*mad));
4210 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
4215 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
4216 * @tgt: ibmvfc target struct
4219 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
4221 struct ibmvfc_host *vhost = tgt->vhost;
4222 struct ibmvfc_event *evt;
4224 if (vhost->discovery_threads >= disc_threads)
4227 vhost->discovery_threads++;
4228 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt,
4229 ibmvfc_tgt_implicit_logout_done);
4231 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4232 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4233 vhost->discovery_threads--;
4234 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4235 kref_put(&tgt->kref, ibmvfc_release_tgt);
4237 tgt_dbg(tgt, "Sent Implicit Logout\n");
4241 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD
4242 * @evt: ibmvfc event struct
4245 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt)
4247 struct ibmvfc_target *tgt = evt->tgt;
4248 struct ibmvfc_host *vhost = evt->vhost;
4249 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
4250 u32 status = be16_to_cpu(mad->common.status);
4252 vhost->discovery_threads--;
4253 ibmvfc_free_event(evt);
4256 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the
4257 * driver in which case we need to free up all the targets. If we are
4258 * not unloading, we will still go through a hard reset to get out of
4259 * offline state, so there is no need to track the old targets in that
4262 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE)
4263 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4265 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT);
4267 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed");
4268 kref_put(&tgt->kref, ibmvfc_release_tgt);
4269 wake_up(&vhost->work_wait_q);
4273 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target
4274 * @tgt: ibmvfc target struct
4277 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt)
4279 struct ibmvfc_host *vhost = tgt->vhost;
4280 struct ibmvfc_event *evt;
4282 if (!vhost->logged_in) {
4283 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4287 if (vhost->discovery_threads >= disc_threads)
4290 vhost->discovery_threads++;
4291 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt,
4292 ibmvfc_tgt_implicit_logout_and_del_done);
4294 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT);
4295 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4296 vhost->discovery_threads--;
4297 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4298 kref_put(&tgt->kref, ibmvfc_release_tgt);
4300 tgt_dbg(tgt, "Sent Implicit Logout\n");
4304 * ibmvfc_tgt_move_login_done - Completion handler for Move Login
4305 * @evt: ibmvfc event struct
4308 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt)
4310 struct ibmvfc_target *tgt = evt->tgt;
4311 struct ibmvfc_host *vhost = evt->vhost;
4312 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login;
4313 u32 status = be16_to_cpu(rsp->common.status);
4314 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4316 vhost->discovery_threads--;
4317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4319 case IBMVFC_MAD_SUCCESS:
4320 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id);
4321 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
4322 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
4323 tgt->scsi_id = tgt->new_scsi_id;
4324 tgt->ids.port_id = tgt->scsi_id;
4325 memcpy(&tgt->service_parms, &rsp->service_parms,
4326 sizeof(tgt->service_parms));
4327 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
4328 sizeof(tgt->service_parms_change));
4329 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
4331 case IBMVFC_MAD_DRIVER_FAILED:
4333 case IBMVFC_MAD_CRQ_ERROR:
4334 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login);
4336 case IBMVFC_MAD_FAILED:
4338 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login);
4341 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n",
4342 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags),
4347 kref_put(&tgt->kref, ibmvfc_release_tgt);
4348 ibmvfc_free_event(evt);
4349 wake_up(&vhost->work_wait_q);
4354 * ibmvfc_tgt_move_login - Initiate a move login for specified target
4355 * @tgt: ibmvfc target struct
4358 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt)
4360 struct ibmvfc_host *vhost = tgt->vhost;
4361 struct ibmvfc_move_login *move;
4362 struct ibmvfc_event *evt;
4364 if (vhost->discovery_threads >= disc_threads)
4367 kref_get(&tgt->kref);
4368 evt = ibmvfc_get_event(&vhost->crq);
4369 vhost->discovery_threads++;
4370 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4371 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT);
4373 move = &evt->iu.move_login;
4374 memset(move, 0, sizeof(*move));
4375 move->common.version = cpu_to_be32(1);
4376 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN);
4377 move->common.length = cpu_to_be16(sizeof(*move));
4379 move->old_scsi_id = cpu_to_be64(tgt->scsi_id);
4380 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id);
4381 move->wwpn = cpu_to_be64(tgt->wwpn);
4382 move->node_name = cpu_to_be64(tgt->ids.node_name);
4384 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4385 vhost->discovery_threads--;
4386 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4387 kref_put(&tgt->kref, ibmvfc_release_tgt);
4389 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id);
4393 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
4394 * @mad: ibmvfc passthru mad struct
4395 * @tgt: ibmvfc target struct
4398 * 1 if PLOGI needed / 0 if PLOGI not needed
4400 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
4401 struct ibmvfc_target *tgt)
4403 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
4405 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
4407 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
4413 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
4414 * @evt: ibmvfc event struct
4417 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
4419 struct ibmvfc_target *tgt = evt->tgt;
4420 struct ibmvfc_host *vhost = evt->vhost;
4421 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
4422 u32 status = be16_to_cpu(mad->common.status);
4423 u8 fc_reason, fc_explain;
4425 vhost->discovery_threads--;
4426 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4427 del_timer(&tgt->timer);
4430 case IBMVFC_MAD_SUCCESS:
4431 tgt_dbg(tgt, "ADISC succeeded\n");
4432 if (ibmvfc_adisc_needs_plogi(mad, tgt))
4433 ibmvfc_del_tgt(tgt);
4435 case IBMVFC_MAD_DRIVER_FAILED:
4437 case IBMVFC_MAD_FAILED:
4439 ibmvfc_del_tgt(tgt);
4440 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
4441 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
4442 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
4443 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
4444 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error),
4445 ibmvfc_get_fc_type(fc_reason), fc_reason,
4446 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
4450 kref_put(&tgt->kref, ibmvfc_release_tgt);
4451 ibmvfc_free_event(evt);
4452 wake_up(&vhost->work_wait_q);
4456 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
4457 * @evt: ibmvfc event struct
4460 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
4462 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
4464 memset(mad, 0, sizeof(*mad));
4465 mad->common.version = cpu_to_be32(1);
4466 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
4467 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
4468 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
4469 offsetof(struct ibmvfc_passthru_mad, iu));
4470 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
4471 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
4472 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
4473 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
4474 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
4475 offsetof(struct ibmvfc_passthru_fc_iu, payload));
4476 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
4477 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
4478 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
4479 offsetof(struct ibmvfc_passthru_fc_iu, response));
4480 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
4484 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
4485 * @evt: ibmvfc event struct
4487 * Just cleanup this event struct. Everything else is handled by
4488 * the ADISC completion handler. If the ADISC never actually comes
4489 * back, we still have the timer running on the ADISC event struct
4490 * which will fire and cause the CRQ to get reset.
4493 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
4495 struct ibmvfc_host *vhost = evt->vhost;
4496 struct ibmvfc_target *tgt = evt->tgt;
4498 tgt_dbg(tgt, "ADISC cancel complete\n");
4499 vhost->abort_threads--;
4500 ibmvfc_free_event(evt);
4501 kref_put(&tgt->kref, ibmvfc_release_tgt);
4502 wake_up(&vhost->work_wait_q);
4506 * ibmvfc_adisc_timeout - Handle an ADISC timeout
4507 * @t: ibmvfc target struct
4509 * If an ADISC times out, send a cancel. If the cancel times
4510 * out, reset the CRQ. When the ADISC comes back as cancelled,
4511 * log back into the target.
4513 static void ibmvfc_adisc_timeout(struct timer_list *t)
4515 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
4516 struct ibmvfc_host *vhost = tgt->vhost;
4517 struct ibmvfc_event *evt;
4518 struct ibmvfc_tmf *tmf;
4519 unsigned long flags;
4522 tgt_dbg(tgt, "ADISC timeout\n");
4523 spin_lock_irqsave(vhost->host->host_lock, flags);
4524 if (vhost->abort_threads >= disc_threads ||
4525 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
4526 vhost->state != IBMVFC_INITIALIZING ||
4527 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
4528 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4532 vhost->abort_threads++;
4533 kref_get(&tgt->kref);
4534 evt = ibmvfc_get_event(&vhost->crq);
4535 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
4539 memset(tmf, 0, sizeof(*tmf));
4540 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
4541 tmf->common.version = cpu_to_be32(2);
4542 tmf->target_wwpn = cpu_to_be64(tgt->wwpn);
4544 tmf->common.version = cpu_to_be32(1);
4546 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
4547 tmf->common.length = cpu_to_be16(sizeof(*tmf));
4548 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
4549 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
4551 rc = ibmvfc_send_event(evt, vhost, default_timeout);
4554 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
4555 vhost->abort_threads--;
4556 kref_put(&tgt->kref, ibmvfc_release_tgt);
4557 __ibmvfc_reset_host(vhost);
4559 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
4560 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4564 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
4565 * @tgt: ibmvfc target struct
4567 * When sending an ADISC we end up with two timers running. The
4568 * first timer is the timer in the ibmvfc target struct. If this
4569 * fires, we send a cancel to the target. The second timer is the
4570 * timer on the ibmvfc event for the ADISC, which is longer. If that
4571 * fires, it means the ADISC timed out and our attempt to cancel it
4572 * also failed, so we need to reset the CRQ.
4574 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
4576 struct ibmvfc_passthru_mad *mad;
4577 struct ibmvfc_host *vhost = tgt->vhost;
4578 struct ibmvfc_event *evt;
4580 if (vhost->discovery_threads >= disc_threads)
4583 kref_get(&tgt->kref);
4584 evt = ibmvfc_get_event(&vhost->crq);
4585 vhost->discovery_threads++;
4586 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
4589 ibmvfc_init_passthru(evt);
4590 mad = &evt->iu.passthru;
4591 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
4592 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
4593 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
4595 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
4596 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
4597 sizeof(vhost->login_buf->resp.port_name));
4598 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
4599 sizeof(vhost->login_buf->resp.node_name));
4600 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
4602 if (timer_pending(&tgt->timer))
4603 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
4605 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
4606 add_timer(&tgt->timer);
4609 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4610 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
4611 vhost->discovery_threads--;
4612 del_timer(&tgt->timer);
4613 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4614 kref_put(&tgt->kref, ibmvfc_release_tgt);
4616 tgt_dbg(tgt, "Sent ADISC\n");
4620 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
4621 * @evt: ibmvfc event struct
4624 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
4626 struct ibmvfc_target *tgt = evt->tgt;
4627 struct ibmvfc_host *vhost = evt->vhost;
4628 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
4629 u32 status = be16_to_cpu(rsp->common.status);
4630 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4632 vhost->discovery_threads--;
4633 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4635 case IBMVFC_MAD_SUCCESS:
4636 tgt_dbg(tgt, "Query Target succeeded\n");
4637 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
4638 ibmvfc_del_tgt(tgt);
4640 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
4642 case IBMVFC_MAD_DRIVER_FAILED:
4644 case IBMVFC_MAD_CRQ_ERROR:
4645 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
4647 case IBMVFC_MAD_FAILED:
4649 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
4650 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
4651 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
4652 ibmvfc_del_tgt(tgt);
4653 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4654 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
4656 ibmvfc_del_tgt(tgt);
4658 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
4659 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4660 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
4661 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
4662 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain),
4667 kref_put(&tgt->kref, ibmvfc_release_tgt);
4668 ibmvfc_free_event(evt);
4669 wake_up(&vhost->work_wait_q);
4673 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
4674 * @tgt: ibmvfc target struct
4677 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
4679 struct ibmvfc_query_tgt *query_tgt;
4680 struct ibmvfc_host *vhost = tgt->vhost;
4681 struct ibmvfc_event *evt;
4683 if (vhost->discovery_threads >= disc_threads)
4686 kref_get(&tgt->kref);
4687 evt = ibmvfc_get_event(&vhost->crq);
4688 vhost->discovery_threads++;
4690 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
4691 query_tgt = &evt->iu.query_tgt;
4692 memset(query_tgt, 0, sizeof(*query_tgt));
4693 query_tgt->common.version = cpu_to_be32(1);
4694 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
4695 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
4696 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
4698 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4699 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4700 vhost->discovery_threads--;
4701 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4702 kref_put(&tgt->kref, ibmvfc_release_tgt);
4704 tgt_dbg(tgt, "Sent Query Target\n");
4708 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
4709 * @vhost: ibmvfc host struct
4710 * @target: Holds SCSI ID to allocate target forand the WWPN
4713 * 0 on success / other on failure
4715 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost,
4716 struct ibmvfc_discover_targets_entry *target)
4718 struct ibmvfc_target *stgt = NULL;
4719 struct ibmvfc_target *wtgt = NULL;
4720 struct ibmvfc_target *tgt;
4721 unsigned long flags;
4722 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK;
4723 u64 wwpn = be64_to_cpu(target->wwpn);
4725 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */
4726 spin_lock_irqsave(vhost->host->host_lock, flags);
4727 list_for_each_entry(tgt, &vhost->targets, queue) {
4728 if (tgt->wwpn == wwpn) {
4734 list_for_each_entry(tgt, &vhost->targets, queue) {
4735 if (tgt->scsi_id == scsi_id) {
4741 if (wtgt && !stgt) {
4743 * A WWPN target has moved and we still are tracking the old
4744 * SCSI ID. The only way we should be able to get here is if
4745 * we attempted to send an implicit logout for the old SCSI ID
4746 * and it failed for some reason, such as there being I/O
4747 * pending to the target. In this case, we will have already
4748 * deleted the rport from the FC transport so we do a move
4749 * login, which works even with I/O pending, however, if
4750 * there is still I/O pending, it will stay outstanding, so
4751 * we only do this if fast fail is disabled for the rport,
4752 * otherwise we let terminate_rport_io clean up the port
4753 * before we login at the new location.
4755 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) {
4756 if (wtgt->move_login) {
4758 * Do a move login here. The old target is no longer
4759 * known to the transport layer We don't use the
4760 * normal ibmvfc_set_tgt_action to set this, as we
4761 * don't normally want to allow this state change.
4763 wtgt->new_scsi_id = scsi_id;
4764 wtgt->action = IBMVFC_TGT_ACTION_INIT;
4765 wtgt->init_retries = 0;
4766 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login);
4770 tgt_err(wtgt, "Unexpected target state: %d, %p\n",
4771 wtgt->action, wtgt->rport);
4774 if (tgt->need_login)
4775 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
4778 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4780 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
4781 memset(tgt, 0, sizeof(*tgt));
4782 tgt->scsi_id = scsi_id;
4785 tgt->need_login = 1;
4786 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
4787 kref_init(&tgt->kref);
4788 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
4789 spin_lock_irqsave(vhost->host->host_lock, flags);
4790 tgt->cancel_key = vhost->task_set++;
4791 list_add_tail(&tgt->queue, &vhost->targets);
4794 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4799 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
4800 * @vhost: ibmvfc host struct
4803 * 0 on success / other on failure
4805 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
4809 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
4810 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]);
4816 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
4817 * @evt: ibmvfc event struct
4820 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
4822 struct ibmvfc_host *vhost = evt->vhost;
4823 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
4824 u32 mad_status = be16_to_cpu(rsp->common.status);
4825 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4827 switch (mad_status) {
4828 case IBMVFC_MAD_SUCCESS:
4829 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
4830 vhost->num_targets = be32_to_cpu(rsp->num_written);
4831 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
4833 case IBMVFC_MAD_FAILED:
4834 level += ibmvfc_retry_host_init(vhost);
4835 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
4836 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4837 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
4839 case IBMVFC_MAD_DRIVER_FAILED:
4842 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
4843 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4847 ibmvfc_free_event(evt);
4848 wake_up(&vhost->work_wait_q);
4852 * ibmvfc_discover_targets - Send Discover Targets MAD
4853 * @vhost: ibmvfc host struct
4856 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
4858 struct ibmvfc_discover_targets *mad;
4859 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
4861 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
4862 mad = &evt->iu.discover_targets;
4863 memset(mad, 0, sizeof(*mad));
4864 mad->common.version = cpu_to_be32(1);
4865 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
4866 mad->common.length = cpu_to_be16(sizeof(*mad));
4867 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
4868 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
4869 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
4870 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST);
4871 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4873 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4874 ibmvfc_dbg(vhost, "Sent discover targets\n");
4876 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4879 static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt)
4881 struct ibmvfc_host *vhost = evt->vhost;
4882 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf;
4883 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs;
4884 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status);
4885 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4886 int flags, active_queues, i;
4888 ibmvfc_free_event(evt);
4890 switch (mad_status) {
4891 case IBMVFC_MAD_SUCCESS:
4892 ibmvfc_dbg(vhost, "Channel Setup succeeded\n");
4893 flags = be32_to_cpu(setup->flags);
4894 vhost->do_enquiry = 0;
4895 active_queues = be32_to_cpu(setup->num_scsi_subq_channels);
4896 scrqs->active_queues = active_queues;
4898 if (flags & IBMVFC_CHANNELS_CANCELED) {
4899 ibmvfc_dbg(vhost, "Channels Canceled\n");
4900 vhost->using_channels = 0;
4903 vhost->using_channels = 1;
4904 for (i = 0; i < active_queues; i++)
4905 scrqs->scrqs[i].vios_cookie =
4906 be64_to_cpu(setup->channel_handles[i]);
4908 ibmvfc_dbg(vhost, "Using %u channels\n",
4909 vhost->scsi_scrqs.active_queues);
4912 case IBMVFC_MAD_FAILED:
4913 level += ibmvfc_retry_host_init(vhost);
4914 ibmvfc_log(vhost, level, "Channel Setup failed\n");
4916 case IBMVFC_MAD_DRIVER_FAILED:
4919 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n",
4921 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4925 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4926 wake_up(&vhost->work_wait_q);
4929 static void ibmvfc_channel_setup(struct ibmvfc_host *vhost)
4931 struct ibmvfc_channel_setup_mad *mad;
4932 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf;
4933 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
4934 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs;
4935 unsigned int num_channels =
4936 min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels);
4939 memset(setup_buf, 0, sizeof(*setup_buf));
4940 if (num_channels == 0)
4941 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS);
4943 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels);
4944 for (i = 0; i < num_channels; i++)
4945 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie);
4948 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT);
4949 mad = &evt->iu.channel_setup;
4950 memset(mad, 0, sizeof(*mad));
4951 mad->common.version = cpu_to_be32(1);
4952 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP);
4953 mad->common.length = cpu_to_be16(sizeof(*mad));
4954 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma);
4955 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf));
4957 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4959 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4960 ibmvfc_dbg(vhost, "Sent channel setup\n");
4962 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
4965 static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt)
4967 struct ibmvfc_host *vhost = evt->vhost;
4968 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry;
4969 u32 mad_status = be16_to_cpu(rsp->common.status);
4970 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4972 switch (mad_status) {
4973 case IBMVFC_MAD_SUCCESS:
4974 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n");
4975 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels);
4976 ibmvfc_free_event(evt);
4978 case IBMVFC_MAD_FAILED:
4979 level += ibmvfc_retry_host_init(vhost);
4980 ibmvfc_log(vhost, level, "Channel Enquiry failed\n");
4982 case IBMVFC_MAD_DRIVER_FAILED:
4983 ibmvfc_free_event(evt);
4986 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n",
4988 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4989 ibmvfc_free_event(evt);
4993 ibmvfc_channel_setup(vhost);
4996 static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost)
4998 struct ibmvfc_channel_enquiry *mad;
4999 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
5001 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT);
5002 mad = &evt->iu.channel_enquiry;
5003 memset(mad, 0, sizeof(*mad));
5004 mad->common.version = cpu_to_be32(1);
5005 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY);
5006 mad->common.length = cpu_to_be16(sizeof(*mad));
5008 if (mig_channels_only)
5009 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT);
5010 if (mig_no_less_channels)
5011 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT);
5013 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
5015 if (!ibmvfc_send_event(evt, vhost, default_timeout))
5016 ibmvfc_dbg(vhost, "Send channel enquiry\n");
5018 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5022 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
5023 * @evt: ibmvfc event struct
5026 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
5028 struct ibmvfc_host *vhost = evt->vhost;
5029 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
5030 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
5031 unsigned int npiv_max_sectors;
5032 int level = IBMVFC_DEFAULT_LOG_LEVEL;
5034 switch (mad_status) {
5035 case IBMVFC_MAD_SUCCESS:
5036 ibmvfc_free_event(evt);
5038 case IBMVFC_MAD_FAILED:
5039 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
5040 level += ibmvfc_retry_host_init(vhost);
5042 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5043 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
5044 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
5045 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
5046 ibmvfc_free_event(evt);
5048 case IBMVFC_MAD_CRQ_ERROR:
5049 ibmvfc_retry_host_init(vhost);
5051 case IBMVFC_MAD_DRIVER_FAILED:
5052 ibmvfc_free_event(evt);
5055 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
5056 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5057 ibmvfc_free_event(evt);
5061 vhost->client_migrated = 0;
5063 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
5064 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
5066 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5067 wake_up(&vhost->work_wait_q);
5071 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
5072 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
5074 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5075 wake_up(&vhost->work_wait_q);
5079 vhost->logged_in = 1;
5080 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
5081 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
5082 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
5083 rsp->drc_name, npiv_max_sectors);
5085 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
5086 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
5087 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
5088 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
5089 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
5090 fc_host_supported_classes(vhost->host) = 0;
5091 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
5092 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
5093 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
5094 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
5095 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
5096 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
5097 fc_host_maxframe_size(vhost->host) =
5098 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
5100 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
5101 vhost->host->max_sectors = npiv_max_sectors;
5103 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) {
5104 ibmvfc_channel_enquiry(vhost);
5106 vhost->do_enquiry = 0;
5107 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
5108 wake_up(&vhost->work_wait_q);
5113 * ibmvfc_npiv_login - Sends NPIV login
5114 * @vhost: ibmvfc host struct
5117 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
5119 struct ibmvfc_npiv_login_mad *mad;
5120 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
5122 ibmvfc_gather_partition_info(vhost);
5123 ibmvfc_set_login_info(vhost);
5124 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
5126 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
5127 mad = &evt->iu.npiv_login;
5128 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
5129 mad->common.version = cpu_to_be32(1);
5130 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
5131 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
5132 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
5133 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
5135 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
5137 if (!ibmvfc_send_event(evt, vhost, default_timeout))
5138 ibmvfc_dbg(vhost, "Sent NPIV login\n");
5140 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5144 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
5145 * @evt: ibmvfc event struct
5148 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
5150 struct ibmvfc_host *vhost = evt->vhost;
5151 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
5153 ibmvfc_free_event(evt);
5155 switch (mad_status) {
5156 case IBMVFC_MAD_SUCCESS:
5157 if (list_empty(&vhost->crq.sent) &&
5158 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
5159 ibmvfc_init_host(vhost);
5163 case IBMVFC_MAD_FAILED:
5164 case IBMVFC_MAD_NOT_SUPPORTED:
5165 case IBMVFC_MAD_CRQ_ERROR:
5166 case IBMVFC_MAD_DRIVER_FAILED:
5168 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
5172 ibmvfc_hard_reset_host(vhost);
5176 * ibmvfc_npiv_logout - Issue an NPIV Logout
5177 * @vhost: ibmvfc host struct
5180 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
5182 struct ibmvfc_npiv_logout_mad *mad;
5183 struct ibmvfc_event *evt;
5185 evt = ibmvfc_get_event(&vhost->crq);
5186 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
5188 mad = &evt->iu.npiv_logout;
5189 memset(mad, 0, sizeof(*mad));
5190 mad->common.version = cpu_to_be32(1);
5191 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
5192 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
5194 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
5196 if (!ibmvfc_send_event(evt, vhost, default_timeout))
5197 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
5199 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5203 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
5204 * @vhost: ibmvfc host struct
5207 * 1 if work to do / 0 if not
5209 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
5211 struct ibmvfc_target *tgt;
5213 list_for_each_entry(tgt, &vhost->targets, queue) {
5214 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
5215 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
5223 * ibmvfc_dev_logo_to_do - Is there target logout work to do?
5224 * @vhost: ibmvfc host struct
5227 * 1 if work to do / 0 if not
5229 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost)
5231 struct ibmvfc_target *tgt;
5233 list_for_each_entry(tgt, &vhost->targets, queue) {
5234 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT ||
5235 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT)
5242 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
5243 * @vhost: ibmvfc host struct
5246 * 1 if work to do / 0 if not
5248 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
5250 struct ibmvfc_target *tgt;
5252 if (kthread_should_stop())
5254 switch (vhost->action) {
5255 case IBMVFC_HOST_ACTION_NONE:
5256 case IBMVFC_HOST_ACTION_INIT_WAIT:
5257 case IBMVFC_HOST_ACTION_LOGO_WAIT:
5259 case IBMVFC_HOST_ACTION_TGT_INIT:
5260 case IBMVFC_HOST_ACTION_QUERY_TGTS:
5261 if (vhost->discovery_threads == disc_threads)
5263 list_for_each_entry(tgt, &vhost->targets, queue)
5264 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
5266 list_for_each_entry(tgt, &vhost->targets, queue)
5267 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
5270 case IBMVFC_HOST_ACTION_TGT_DEL:
5271 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
5272 if (vhost->discovery_threads == disc_threads)
5274 list_for_each_entry(tgt, &vhost->targets, queue)
5275 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT)
5277 list_for_each_entry(tgt, &vhost->targets, queue)
5278 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT)
5281 case IBMVFC_HOST_ACTION_LOGO:
5282 case IBMVFC_HOST_ACTION_INIT:
5283 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
5284 case IBMVFC_HOST_ACTION_QUERY:
5285 case IBMVFC_HOST_ACTION_RESET:
5286 case IBMVFC_HOST_ACTION_REENABLE:
5295 * ibmvfc_work_to_do - Is there task level work to do?
5296 * @vhost: ibmvfc host struct
5299 * 1 if work to do / 0 if not
5301 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
5303 unsigned long flags;
5306 spin_lock_irqsave(vhost->host->host_lock, flags);
5307 rc = __ibmvfc_work_to_do(vhost);
5308 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5313 * ibmvfc_log_ae - Log async events if necessary
5314 * @vhost: ibmvfc host struct
5315 * @events: events to log
5318 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
5320 if (events & IBMVFC_AE_RSCN)
5321 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
5322 if ((events & IBMVFC_AE_LINKDOWN) &&
5323 vhost->state >= IBMVFC_HALTED)
5324 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
5325 if ((events & IBMVFC_AE_LINKUP) &&
5326 vhost->state == IBMVFC_INITIALIZING)
5327 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
5331 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
5332 * @tgt: ibmvfc target struct
5335 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
5337 struct ibmvfc_host *vhost = tgt->vhost;
5338 struct fc_rport *rport;
5339 unsigned long flags;
5341 tgt_dbg(tgt, "Adding rport\n");
5342 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
5343 spin_lock_irqsave(vhost->host->host_lock, flags);
5345 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
5346 tgt_dbg(tgt, "Deleting rport\n");
5347 list_del(&tgt->queue);
5348 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
5349 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5350 fc_remote_port_delete(rport);
5351 del_timer_sync(&tgt->timer);
5352 kref_put(&tgt->kref, ibmvfc_release_tgt);
5354 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) {
5355 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n");
5356 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT);
5358 tgt->init_retries = 0;
5359 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5360 fc_remote_port_delete(rport);
5362 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
5363 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5368 tgt_dbg(tgt, "rport add succeeded\n");
5370 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
5371 rport->supported_classes = 0;
5372 tgt->target_id = rport->scsi_target_id;
5373 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
5374 rport->supported_classes |= FC_COS_CLASS1;
5375 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
5376 rport->supported_classes |= FC_COS_CLASS2;
5377 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
5378 rport->supported_classes |= FC_COS_CLASS3;
5380 blk_queue_max_segments(rport->rqst_q, 1);
5382 tgt_dbg(tgt, "rport add failed\n");
5383 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5387 * ibmvfc_do_work - Do task level work
5388 * @vhost: ibmvfc host struct
5391 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
5393 struct ibmvfc_target *tgt;
5394 unsigned long flags;
5395 struct fc_rport *rport;
5399 ibmvfc_log_ae(vhost, vhost->events_to_log);
5400 spin_lock_irqsave(vhost->host->host_lock, flags);
5401 vhost->events_to_log = 0;
5402 switch (vhost->action) {
5403 case IBMVFC_HOST_ACTION_NONE:
5404 case IBMVFC_HOST_ACTION_LOGO_WAIT:
5405 case IBMVFC_HOST_ACTION_INIT_WAIT:
5407 case IBMVFC_HOST_ACTION_RESET:
5408 list_splice_init(&vhost->purge, &purge);
5409 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5410 ibmvfc_complete_purge(&purge);
5411 rc = ibmvfc_reset_crq(vhost);
5413 spin_lock_irqsave(vhost->host->host_lock, flags);
5414 if (!rc || rc == H_CLOSED)
5415 vio_enable_interrupts(to_vio_dev(vhost->dev));
5416 if (vhost->action == IBMVFC_HOST_ACTION_RESET) {
5418 * The only action we could have changed to would have
5419 * been reenable, in which case, we skip the rest of
5420 * this path and wait until we've done the re-enable
5421 * before sending the crq init.
5423 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
5425 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
5426 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
5427 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5428 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
5432 case IBMVFC_HOST_ACTION_REENABLE:
5433 list_splice_init(&vhost->purge, &purge);
5434 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5435 ibmvfc_complete_purge(&purge);
5436 rc = ibmvfc_reenable_crq_queue(vhost);
5438 spin_lock_irqsave(vhost->host->host_lock, flags);
5439 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) {
5441 * The only action we could have changed to would have
5442 * been reset, in which case, we skip the rest of this
5443 * path and wait until we've done the reset before
5444 * sending the crq init.
5446 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
5447 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
5448 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5449 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
5453 case IBMVFC_HOST_ACTION_LOGO:
5454 vhost->job_step(vhost);
5456 case IBMVFC_HOST_ACTION_INIT:
5457 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
5458 if (vhost->delay_init) {
5459 vhost->delay_init = 0;
5460 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5464 vhost->job_step(vhost);
5466 case IBMVFC_HOST_ACTION_QUERY:
5467 list_for_each_entry(tgt, &vhost->targets, queue)
5468 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
5469 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
5471 case IBMVFC_HOST_ACTION_QUERY_TGTS:
5472 list_for_each_entry(tgt, &vhost->targets, queue) {
5473 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
5479 if (!ibmvfc_dev_init_to_do(vhost))
5480 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
5482 case IBMVFC_HOST_ACTION_TGT_DEL:
5483 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
5484 list_for_each_entry(tgt, &vhost->targets, queue) {
5485 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) {
5491 if (ibmvfc_dev_logo_to_do(vhost)) {
5492 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5496 list_for_each_entry(tgt, &vhost->targets, queue) {
5497 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
5498 tgt_dbg(tgt, "Deleting rport\n");
5501 list_del(&tgt->queue);
5502 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
5503 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5505 fc_remote_port_delete(rport);
5506 del_timer_sync(&tgt->timer);
5507 kref_put(&tgt->kref, ibmvfc_release_tgt);
5509 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) {
5510 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n");
5513 tgt->init_retries = 0;
5514 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT);
5517 * If fast fail is enabled, we wait for it to fire and then clean up
5518 * the old port, since we expect the fast fail timer to clean up the
5519 * outstanding I/O faster than waiting for normal command timeouts.
5520 * However, if fast fail is disabled, any I/O outstanding to the
5521 * rport LUNs will stay outstanding indefinitely, since the EH handlers
5522 * won't get invoked for I/O's timing out. If this is a NPIV failover
5523 * scenario, the better alternative is to use the move login.
5525 if (rport && rport->fast_io_fail_tmo == -1)
5526 tgt->move_login = 1;
5527 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5529 fc_remote_port_delete(rport);
5534 if (vhost->state == IBMVFC_INITIALIZING) {
5535 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
5536 if (vhost->reinit) {
5538 scsi_block_requests(vhost->host);
5539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
5540 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5542 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
5543 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
5544 wake_up(&vhost->init_wait_q);
5545 schedule_work(&vhost->rport_add_work_q);
5546 vhost->init_retries = 0;
5547 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5548 scsi_unblock_requests(vhost->host);
5553 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
5554 vhost->job_step = ibmvfc_discover_targets;
5557 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
5558 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5559 scsi_unblock_requests(vhost->host);
5560 wake_up(&vhost->init_wait_q);
5564 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
5565 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
5566 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5567 ibmvfc_alloc_targets(vhost);
5568 spin_lock_irqsave(vhost->host->host_lock, flags);
5570 case IBMVFC_HOST_ACTION_TGT_INIT:
5571 list_for_each_entry(tgt, &vhost->targets, queue) {
5572 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
5578 if (!ibmvfc_dev_init_to_do(vhost))
5579 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
5585 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5589 * ibmvfc_work - Do task level work
5590 * @data: ibmvfc host struct
5595 static int ibmvfc_work(void *data)
5597 struct ibmvfc_host *vhost = data;
5600 set_user_nice(current, MIN_NICE);
5603 rc = wait_event_interruptible(vhost->work_wait_q,
5604 ibmvfc_work_to_do(vhost));
5608 if (kthread_should_stop())
5611 ibmvfc_do_work(vhost);
5614 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
5619 * ibmvfc_alloc_queue - Allocate queue
5620 * @vhost: ibmvfc host struct
5621 * @queue: ibmvfc queue to allocate
5622 * @fmt: queue format to allocate
5625 * 0 on success / non-zero on failure
5627 static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost,
5628 struct ibmvfc_queue *queue,
5629 enum ibmvfc_msg_fmt fmt)
5631 struct device *dev = vhost->dev;
5633 unsigned int pool_size = 0;
5636 spin_lock_init(&queue->_lock);
5637 queue->q_lock = &queue->_lock;
5640 case IBMVFC_CRQ_FMT:
5641 fmt_size = sizeof(*queue->msgs.crq);
5642 pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
5644 case IBMVFC_ASYNC_FMT:
5645 fmt_size = sizeof(*queue->msgs.async);
5647 case IBMVFC_SUB_CRQ_FMT:
5648 fmt_size = sizeof(*queue->msgs.scrq);
5649 /* We need one extra event for Cancel Commands */
5650 pool_size = max_requests + 1;
5653 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt);
5657 if (ibmvfc_init_event_pool(vhost, queue, pool_size)) {
5658 dev_err(dev, "Couldn't initialize event pool.\n");
5662 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL);
5663 if (!queue->msgs.handle)
5666 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE,
5669 if (dma_mapping_error(dev, queue->msg_token)) {
5670 free_page((unsigned long)queue->msgs.handle);
5671 queue->msgs.handle = NULL;
5677 queue->size = PAGE_SIZE / fmt_size;
5682 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
5683 * @vhost: ibmvfc host struct
5685 * Allocates a page for messages, maps it for dma, and registers
5686 * the crq with the hypervisor.
5689 * zero on success / other on failure
5691 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
5693 int rc, retrc = -ENOMEM;
5694 struct device *dev = vhost->dev;
5695 struct vio_dev *vdev = to_vio_dev(dev);
5696 struct ibmvfc_queue *crq = &vhost->crq;
5699 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT))
5702 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5703 crq->msg_token, PAGE_SIZE);
5705 if (rc == H_RESOURCE)
5706 /* maybe kexecing and resource is busy. try a reset */
5707 retrc = rc = ibmvfc_reset_crq(vhost);
5710 dev_warn(dev, "Partner adapter not ready\n");
5712 dev_warn(dev, "Error %d opening adapter\n", rc);
5713 goto reg_crq_failed;
5718 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
5720 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
5721 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
5722 goto req_irq_failed;
5725 if ((rc = vio_enable_interrupts(vdev))) {
5726 dev_err(dev, "Error %d enabling interrupts\n", rc);
5727 goto req_irq_failed;
5734 tasklet_kill(&vhost->tasklet);
5736 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5737 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5739 ibmvfc_free_queue(vhost, crq);
5743 static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost,
5746 struct device *dev = vhost->dev;
5747 struct vio_dev *vdev = to_vio_dev(dev);
5748 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index];
5753 if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT))
5756 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE,
5757 &scrq->cookie, &scrq->hw_irq);
5759 /* H_CLOSED indicates successful register, but no CRQ partner */
5760 if (rc && rc != H_CLOSED) {
5761 dev_warn(dev, "Error registering sub-crq: %d\n", rc);
5762 if (rc == H_PARAMETER)
5763 dev_warn_once(dev, "Firmware may not support MQ\n");
5767 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
5771 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index);
5775 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d",
5776 vdev->unit_address, index);
5777 rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq);
5780 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index);
5781 irq_dispose_mapping(scrq->irq);
5785 scrq->hwq_id = index;
5786 scrq->vhost = vhost;
5793 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie);
5794 } while (rtas_busy_delay(rc));
5796 ibmvfc_free_queue(vhost, scrq);
5801 static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index)
5803 struct device *dev = vhost->dev;
5804 struct vio_dev *vdev = to_vio_dev(dev);
5805 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index];
5810 free_irq(scrq->irq, scrq);
5811 irq_dispose_mapping(scrq->irq);
5815 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address,
5817 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5820 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc);
5822 ibmvfc_free_queue(vhost, scrq);
5826 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost)
5831 if (!vhost->mq_enabled)
5834 vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues,
5835 sizeof(*vhost->scsi_scrqs.scrqs),
5837 if (!vhost->scsi_scrqs.scrqs) {
5838 vhost->do_enquiry = 0;
5842 for (i = 0; i < nr_scsi_hw_queues; i++) {
5843 if (ibmvfc_register_scsi_channel(vhost, i)) {
5844 for (j = i; j > 0; j--)
5845 ibmvfc_deregister_scsi_channel(vhost, j - 1);
5846 kfree(vhost->scsi_scrqs.scrqs);
5847 vhost->scsi_scrqs.scrqs = NULL;
5848 vhost->scsi_scrqs.active_queues = 0;
5849 vhost->do_enquiry = 0;
5857 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost)
5862 if (!vhost->scsi_scrqs.scrqs)
5865 for (i = 0; i < nr_scsi_hw_queues; i++)
5866 ibmvfc_deregister_scsi_channel(vhost, i);
5868 kfree(vhost->scsi_scrqs.scrqs);
5869 vhost->scsi_scrqs.scrqs = NULL;
5870 vhost->scsi_scrqs.active_queues = 0;
5875 * ibmvfc_free_mem - Free memory for vhost
5876 * @vhost: ibmvfc host struct
5881 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
5883 struct ibmvfc_queue *async_q = &vhost->async_crq;
5886 mempool_destroy(vhost->tgt_pool);
5887 kfree(vhost->trace);
5888 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
5889 vhost->disc_buf_dma);
5890 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
5891 vhost->login_buf, vhost->login_buf_dma);
5892 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf),
5893 vhost->channel_setup_buf, vhost->channel_setup_dma);
5894 dma_pool_destroy(vhost->sg_pool);
5895 ibmvfc_free_queue(vhost, async_q);
5900 * ibmvfc_alloc_mem - Allocate memory for vhost
5901 * @vhost: ibmvfc host struct
5904 * 0 on success / non-zero on failure
5906 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
5908 struct ibmvfc_queue *async_q = &vhost->async_crq;
5909 struct device *dev = vhost->dev;
5912 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) {
5913 dev_err(dev, "Couldn't allocate/map async queue.\n");
5917 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
5918 SG_ALL * sizeof(struct srp_direct_buf),
5919 sizeof(struct srp_direct_buf), 0);
5921 if (!vhost->sg_pool) {
5922 dev_err(dev, "Failed to allocate sg pool\n");
5923 goto unmap_async_crq;
5926 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
5927 &vhost->login_buf_dma, GFP_KERNEL);
5929 if (!vhost->login_buf) {
5930 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
5934 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets;
5935 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
5936 &vhost->disc_buf_dma, GFP_KERNEL);
5938 if (!vhost->disc_buf) {
5939 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
5940 goto free_login_buffer;
5943 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
5944 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
5945 atomic_set(&vhost->trace_index, -1);
5948 goto free_disc_buffer;
5950 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
5951 sizeof(struct ibmvfc_target));
5953 if (!vhost->tgt_pool) {
5954 dev_err(dev, "Couldn't allocate target memory pool\n");
5958 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf),
5959 &vhost->channel_setup_dma,
5962 if (!vhost->channel_setup_buf) {
5963 dev_err(dev, "Couldn't allocate Channel Setup buffer\n");
5971 mempool_destroy(vhost->tgt_pool);
5973 kfree(vhost->trace);
5975 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
5976 vhost->disc_buf_dma);
5978 dma_free_coherent(dev, sizeof(*vhost->login_buf),
5979 vhost->login_buf, vhost->login_buf_dma);
5981 dma_pool_destroy(vhost->sg_pool);
5983 ibmvfc_free_queue(vhost, async_q);
5990 * ibmvfc_rport_add_thread - Worker thread for rport adds
5991 * @work: work struct
5994 static void ibmvfc_rport_add_thread(struct work_struct *work)
5996 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
5998 struct ibmvfc_target *tgt;
5999 struct fc_rport *rport;
6000 unsigned long flags;
6004 spin_lock_irqsave(vhost->host->host_lock, flags);
6007 if (vhost->state != IBMVFC_ACTIVE)
6010 list_for_each_entry(tgt, &vhost->targets, queue) {
6011 if (tgt->add_rport) {
6014 kref_get(&tgt->kref);
6017 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6018 ibmvfc_tgt_add_rport(tgt);
6019 } else if (get_device(&rport->dev)) {
6020 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6021 tgt_dbg(tgt, "Setting rport roles\n");
6022 fc_remote_port_rolechg(rport, tgt->ids.roles);
6023 put_device(&rport->dev);
6025 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6028 kref_put(&tgt->kref, ibmvfc_release_tgt);
6029 spin_lock_irqsave(vhost->host->host_lock, flags);
6035 if (vhost->state == IBMVFC_ACTIVE)
6036 vhost->scan_complete = 1;
6037 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6042 * ibmvfc_probe - Adapter hot plug add entry point
6043 * @vdev: vio device struct
6044 * @id: vio device id struct
6047 * 0 on success / non-zero on failure
6049 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
6051 struct ibmvfc_host *vhost;
6052 struct Scsi_Host *shost;
6053 struct device *dev = &vdev->dev;
6055 unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES;
6058 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
6060 dev_err(dev, "Couldn't allocate host data\n");
6064 shost->transportt = ibmvfc_transport_template;
6065 shost->can_queue = max_requests;
6066 shost->max_lun = max_lun;
6067 shost->max_id = max_targets;
6068 shost->max_sectors = IBMVFC_MAX_SECTORS;
6069 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
6070 shost->unique_id = shost->host_no;
6071 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1;
6073 vhost = shost_priv(shost);
6074 INIT_LIST_HEAD(&vhost->targets);
6075 INIT_LIST_HEAD(&vhost->purge);
6076 sprintf(vhost->name, IBMVFC_NAME);
6077 vhost->host = shost;
6079 vhost->partition_number = -1;
6080 vhost->log_level = log_level;
6081 vhost->task_set = 1;
6083 vhost->mq_enabled = mq_enabled;
6084 vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels);
6085 vhost->using_channels = 0;
6086 vhost->do_enquiry = 1;
6088 strcpy(vhost->partition_name, "UNKNOWN");
6089 init_waitqueue_head(&vhost->work_wait_q);
6090 init_waitqueue_head(&vhost->init_wait_q);
6091 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
6092 mutex_init(&vhost->passthru_mutex);
6094 if ((rc = ibmvfc_alloc_mem(vhost)))
6095 goto free_scsi_host;
6097 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
6100 if (IS_ERR(vhost->work_thread)) {
6101 dev_err(dev, "Couldn't create kernel thread: %ld\n",
6102 PTR_ERR(vhost->work_thread));
6103 rc = PTR_ERR(vhost->work_thread);
6107 if ((rc = ibmvfc_init_crq(vhost))) {
6108 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
6112 if ((rc = scsi_add_host(shost, dev)))
6115 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
6117 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
6118 &ibmvfc_trace_attr))) {
6119 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
6123 ibmvfc_init_sub_crqs(vhost);
6125 if (shost_to_fc_host(shost)->rqst_q)
6126 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
6127 dev_set_drvdata(dev, vhost);
6128 spin_lock(&ibmvfc_driver_lock);
6129 list_add_tail(&vhost->queue, &ibmvfc_head);
6130 spin_unlock(&ibmvfc_driver_lock);
6132 ibmvfc_send_crq_init(vhost);
6133 scsi_scan_host(shost);
6137 scsi_remove_host(shost);
6139 ibmvfc_release_crq_queue(vhost);
6141 kthread_stop(vhost->work_thread);
6143 ibmvfc_free_mem(vhost);
6145 scsi_host_put(shost);
6152 * ibmvfc_remove - Adapter hot plug remove entry point
6153 * @vdev: vio device struct
6158 static void ibmvfc_remove(struct vio_dev *vdev)
6160 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
6162 unsigned long flags;
6165 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
6167 spin_lock_irqsave(vhost->host->host_lock, flags);
6168 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
6169 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6171 ibmvfc_wait_while_resetting(vhost);
6172 kthread_stop(vhost->work_thread);
6173 fc_remove_host(vhost->host);
6174 scsi_remove_host(vhost->host);
6176 spin_lock_irqsave(vhost->host->host_lock, flags);
6177 ibmvfc_purge_requests(vhost, DID_ERROR);
6178 list_splice_init(&vhost->purge, &purge);
6179 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6180 ibmvfc_complete_purge(&purge);
6181 ibmvfc_release_sub_crqs(vhost);
6182 ibmvfc_release_crq_queue(vhost);
6184 ibmvfc_free_mem(vhost);
6185 spin_lock(&ibmvfc_driver_lock);
6186 list_del(&vhost->queue);
6187 spin_unlock(&ibmvfc_driver_lock);
6188 scsi_host_put(vhost->host);
6193 * ibmvfc_resume - Resume from suspend
6194 * @dev: device struct
6196 * We may have lost an interrupt across suspend/resume, so kick the
6200 static int ibmvfc_resume(struct device *dev)
6202 unsigned long flags;
6203 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
6204 struct vio_dev *vdev = to_vio_dev(dev);
6206 spin_lock_irqsave(vhost->host->host_lock, flags);
6207 vio_disable_interrupts(vdev);
6208 tasklet_schedule(&vhost->tasklet);
6209 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6214 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
6215 * @vdev: vio device struct
6218 * Number of bytes the driver will need to DMA map at the same time in
6219 * order to perform well.
6221 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
6223 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
6224 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
6227 static const struct vio_device_id ibmvfc_device_table[] = {
6228 {"fcp", "IBM,vfc-client"},
6231 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
6233 static const struct dev_pm_ops ibmvfc_pm_ops = {
6234 .resume = ibmvfc_resume
6237 static struct vio_driver ibmvfc_driver = {
6238 .id_table = ibmvfc_device_table,
6239 .probe = ibmvfc_probe,
6240 .remove = ibmvfc_remove,
6241 .get_desired_dma = ibmvfc_get_desired_dma,
6242 .name = IBMVFC_NAME,
6243 .pm = &ibmvfc_pm_ops,
6246 static struct fc_function_template ibmvfc_transport_functions = {
6247 .show_host_fabric_name = 1,
6248 .show_host_node_name = 1,
6249 .show_host_port_name = 1,
6250 .show_host_supported_classes = 1,
6251 .show_host_port_type = 1,
6252 .show_host_port_id = 1,
6253 .show_host_maxframe_size = 1,
6255 .get_host_port_state = ibmvfc_get_host_port_state,
6256 .show_host_port_state = 1,
6258 .get_host_speed = ibmvfc_get_host_speed,
6259 .show_host_speed = 1,
6261 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
6262 .terminate_rport_io = ibmvfc_terminate_rport_io,
6264 .show_rport_maxframe_size = 1,
6265 .show_rport_supported_classes = 1,
6267 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
6268 .show_rport_dev_loss_tmo = 1,
6270 .get_starget_node_name = ibmvfc_get_starget_node_name,
6271 .show_starget_node_name = 1,
6273 .get_starget_port_name = ibmvfc_get_starget_port_name,
6274 .show_starget_port_name = 1,
6276 .get_starget_port_id = ibmvfc_get_starget_port_id,
6277 .show_starget_port_id = 1,
6279 .bsg_request = ibmvfc_bsg_request,
6280 .bsg_timeout = ibmvfc_bsg_timeout,
6284 * ibmvfc_module_init - Initialize the ibmvfc module
6287 * 0 on success / other on failure
6289 static int __init ibmvfc_module_init(void)
6293 if (!firmware_has_feature(FW_FEATURE_VIO))
6296 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
6297 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
6299 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
6300 if (!ibmvfc_transport_template)
6303 rc = vio_register_driver(&ibmvfc_driver);
6305 fc_release_transport(ibmvfc_transport_template);
6310 * ibmvfc_module_exit - Teardown the ibmvfc module
6315 static void __exit ibmvfc_module_exit(void)
6317 vio_unregister_driver(&ibmvfc_driver);
6318 fc_release_transport(ibmvfc_transport_template);
6321 module_init(ibmvfc_module_init);
6322 module_exit(ibmvfc_module_exit);