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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / drivers / scsi / ibmvscsi / ibmvfc.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
072b91f9
BK		 2/*
3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 *
5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 *
7 * Copyright (C) IBM Corporation, 2008
072b91f9
BK		 8 */
9
10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/dma-mapping.h>
13#include <linux/dmapool.h>
14#include <linux/delay.h>
15#include <linux/interrupt.h>
16#include <linux/kthread.h>
5a0e3ad6 17#include <linux/slab.h>
072b91f9 18#include <linux/of.h>
b0f4d4cf 19#include <linux/pm.h>
072b91f9 20#include <linux/stringify.h>
75cc8cfc 21#include <linux/bsg-lib.h>
072b91f9
BK		 22#include <asm/firmware.h>
23#include <asm/irq.h>
24#include <asm/vio.h>
25#include <scsi/scsi.h>
26#include <scsi/scsi_cmnd.h>
27#include <scsi/scsi_host.h>
28#include <scsi/scsi_device.h>
29#include <scsi/scsi_tcq.h>
30#include <scsi/scsi_transport_fc.h>
d31429e1 31#include <scsi/scsi_bsg_fc.h>
072b91f9
BK		 32#include "ibmvfc.h"
33
34static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
35static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
1abf635d 36static u64 max_lun = IBMVFC_MAX_LUN;
072b91f9
BK		 37static unsigned int max_targets = IBMVFC_MAX_TARGETS;
38static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
39static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
072b91f9
BK		 40static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
41static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
a6104b1e 42static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
072b91f9
BK		 43static LIST_HEAD(ibmvfc_head);
44static DEFINE_SPINLOCK(ibmvfc_driver_lock);
45static struct scsi_transport_template *ibmvfc_transport_template;
46
47MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
48MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
49MODULE_LICENSE("GPL");
50MODULE_VERSION(IBMVFC_DRIVER_VERSION);
51
52module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
53MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
54 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
55module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
56MODULE_PARM_DESC(default_timeout,
57 "Default timeout in seconds for initialization and EH commands. "
58 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
59module_param_named(max_requests, max_requests, uint, S_IRUGO);
60MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
61 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
1abf635d 62module_param_named(max_lun, max_lun, ullong, S_IRUGO);
072b91f9
BK		 63MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
64 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
65module_param_named(max_targets, max_targets, uint, S_IRUGO);
66MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
67 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
545ef9a2 68module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
072b91f9
BK		 69MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
70 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
71module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
72MODULE_PARM_DESC(debug, "Enable driver debug information. "
73 "[Default=" __stringify(IBMVFC_DEBUG) "]");
072b91f9
BK		 74module_param_named(log_level, log_level, uint, 0);
75MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
76 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
a6104b1e 77module_param_named(cls3_error, cls3_error, uint, 0);
6c46301f 78MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
a6104b1e 79 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
072b91f9
BK		 80
81static const struct {
82 u16 status;
83 u16 error;
84 u8 result;
85 u8 retry;
86 int log;
87 char *name;
88} cmd_status [] = {
89 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
90 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
91 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
752b3232 92 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
072b91f9
BK		 93 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
94 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
95 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
96 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
97 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
98 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
99 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
100 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
497f9c50 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
072b91f9
BK		 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
103
104 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
105 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
752b3232
BK		 106 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
107 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
072b91f9 108 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
752b3232
BK		 109 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
110 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
072b91f9 111 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
646d3857 112 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
072b91f9
BK		 113 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
114
115 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
116 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
117 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
118 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
119 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
120 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
121 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
122 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
123 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
124 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
125 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
126
127 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
95237c25 128 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." },
072b91f9
BK		 129};
130
131static void ibmvfc_npiv_login(struct ibmvfc_host *);
132static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
133static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
134static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
79111d08 135static void ibmvfc_npiv_logout(struct ibmvfc_host *);
ed830385 136static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *);
072b91f9
BK		 137
138static const char *unknown_error = "unknown error";
139
140#ifdef CONFIG_SCSI_IBMVFC_TRACE
141/**
142 * ibmvfc_trc_start - Log a start trace entry
143 * @evt: ibmvfc event struct
144 *
145 **/
146static void ibmvfc_trc_start(struct ibmvfc_event *evt)
147{
148 struct ibmvfc_host *vhost = evt->vhost;
149 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
150 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
151 struct ibmvfc_trace_entry *entry;
152
153 entry = &vhost->trace[vhost->trace_index++];
154 entry->evt = evt;
155 entry->time = jiffies;
156 entry->fmt = evt->crq.format;
157 entry->type = IBMVFC_TRC_START;
158
159 switch (entry->fmt) {
160 case IBMVFC_CMD_FORMAT:
161 entry->op_code = vfc_cmd->iu.cdb[0];
0aab6c3f 162 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 163 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
164 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f 165 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
072b91f9
BK		 166 break;
167 case IBMVFC_MAD_FORMAT:
0aab6c3f 168 entry->op_code = be32_to_cpu(mad->opcode);
072b91f9
BK		 169 break;
170 default:
171 break;
f36cfe6a 172 }
072b91f9
BK		 173}
174
175/**
176 * ibmvfc_trc_end - Log an end trace entry
177 * @evt: ibmvfc event struct
178 *
179 **/
180static void ibmvfc_trc_end(struct ibmvfc_event *evt)
181{
182 struct ibmvfc_host *vhost = evt->vhost;
183 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
184 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
185 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
186
187 entry->evt = evt;
188 entry->time = jiffies;
189 entry->fmt = evt->crq.format;
190 entry->type = IBMVFC_TRC_END;
191
192 switch (entry->fmt) {
193 case IBMVFC_CMD_FORMAT:
194 entry->op_code = vfc_cmd->iu.cdb[0];
0aab6c3f 195 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 196 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
197 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f
TD		 198 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
199 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
072b91f9
BK		 200 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
201 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
202 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
203 break;
204 case IBMVFC_MAD_FORMAT:
0aab6c3f
TD		 205 entry->op_code = be32_to_cpu(mad->opcode);
206 entry->u.end.status = be16_to_cpu(mad->status);
072b91f9
BK		 207 break;
208 default:
209 break;
210
f36cfe6a 211 }
072b91f9
BK		 212}
213
214#else
215#define ibmvfc_trc_start(evt) do { } while (0)
216#define ibmvfc_trc_end(evt) do { } while (0)
217#endif
218
219/**
220 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
221 * @status: status / error class
222 * @error: error
223 *
224 * Return value:
225 * index into cmd_status / -EINVAL on failure
226 **/
227static int ibmvfc_get_err_index(u16 status, u16 error)
228{
229 int i;
230
231 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
232 if ((cmd_status[i].status & status) == cmd_status[i].status &&
233 cmd_status[i].error == error)
234 return i;
235
236 return -EINVAL;
237}
238
239/**
240 * ibmvfc_get_cmd_error - Find the error description for the fcp response
241 * @status: status / error class
242 * @error: error
243 *
244 * Return value:
245 * error description string
246 **/
247static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
248{
249 int rc = ibmvfc_get_err_index(status, error);
250 if (rc >= 0)
251 return cmd_status[rc].name;
252 return unknown_error;
253}
254
255/**
256 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
257 * @vfc_cmd: ibmvfc command struct
258 *
259 * Return value:
260 * SCSI result value to return for completed command
261 **/
262static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
263{
264 int err;
265 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
0aab6c3f 266 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 267
268 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
4a2837d4 269 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
072b91f9
BK		 270 rsp->data.info.rsp_code))
271 return DID_ERROR << 16;
272
0aab6c3f 273 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 274 if (err >= 0)
275 return rsp->scsi_status | (cmd_status[err].result << 16);
276 return rsp->scsi_status | (DID_ERROR << 16);
277}
278
279/**
280 * ibmvfc_retry_cmd - Determine if error status is retryable
281 * @status: status / error class
282 * @error: error
283 *
284 * Return value:
285 * 1 if error should be retried / 0 if it should not
286 **/
287static int ibmvfc_retry_cmd(u16 status, u16 error)
288{
289 int rc = ibmvfc_get_err_index(status, error);
290
291 if (rc >= 0)
292 return cmd_status[rc].retry;
293 return 1;
294}
295
296static const char *unknown_fc_explain = "unknown fc explain";
297
298static const struct {
299 u16 fc_explain;
300 char *name;
301} ls_explain [] = {
302 { 0x00, "no additional explanation" },
303 { 0x01, "service parameter error - options" },
304 { 0x03, "service parameter error - initiator control" },
305 { 0x05, "service parameter error - recipient control" },
306 { 0x07, "service parameter error - received data field size" },
307 { 0x09, "service parameter error - concurrent seq" },
308 { 0x0B, "service parameter error - credit" },
309 { 0x0D, "invalid N_Port/F_Port_Name" },
310 { 0x0E, "invalid node/Fabric Name" },
311 { 0x0F, "invalid common service parameters" },
312 { 0x11, "invalid association header" },
313 { 0x13, "association header required" },
314 { 0x15, "invalid originator S_ID" },
315 { 0x17, "invalid OX_ID-RX-ID combination" },
316 { 0x19, "command (request) already in progress" },
317 { 0x1E, "N_Port Login requested" },
318 { 0x1F, "Invalid N_Port_ID" },
319};
320
321static const struct {
322 u16 fc_explain;
323 char *name;
324} gs_explain [] = {
325 { 0x00, "no additional explanation" },
326 { 0x01, "port identifier not registered" },
327 { 0x02, "port name not registered" },
328 { 0x03, "node name not registered" },
329 { 0x04, "class of service not registered" },
330 { 0x06, "initial process associator not registered" },
331 { 0x07, "FC-4 TYPEs not registered" },
332 { 0x08, "symbolic port name not registered" },
333 { 0x09, "symbolic node name not registered" },
334 { 0x0A, "port type not registered" },
335 { 0xF0, "authorization exception" },
336 { 0xF1, "authentication exception" },
337 { 0xF2, "data base full" },
338 { 0xF3, "data base empty" },
339 { 0xF4, "processing request" },
340 { 0xF5, "unable to verify connection" },
341 { 0xF6, "devices not in a common zone" },
342};
343
344/**
345 * ibmvfc_get_ls_explain - Return the FC Explain description text
346 * @status: FC Explain status
347 *
348 * Returns:
349 * error string
350 **/
351static const char *ibmvfc_get_ls_explain(u16 status)
352{
353 int i;
354
355 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
356 if (ls_explain[i].fc_explain == status)
357 return ls_explain[i].name;
358
359 return unknown_fc_explain;
360}
361
362/**
363 * ibmvfc_get_gs_explain - Return the FC Explain description text
364 * @status: FC Explain status
365 *
366 * Returns:
367 * error string
368 **/
369static const char *ibmvfc_get_gs_explain(u16 status)
370{
371 int i;
372
373 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
374 if (gs_explain[i].fc_explain == status)
375 return gs_explain[i].name;
376
377 return unknown_fc_explain;
378}
379
380static const struct {
381 enum ibmvfc_fc_type fc_type;
382 char *name;
383} fc_type [] = {
384 { IBMVFC_FABRIC_REJECT, "fabric reject" },
385 { IBMVFC_PORT_REJECT, "port reject" },
386 { IBMVFC_LS_REJECT, "ELS reject" },
387 { IBMVFC_FABRIC_BUSY, "fabric busy" },
388 { IBMVFC_PORT_BUSY, "port busy" },
389 { IBMVFC_BASIC_REJECT, "basic reject" },
390};
391
392static const char *unknown_fc_type = "unknown fc type";
393
394/**
395 * ibmvfc_get_fc_type - Return the FC Type description text
396 * @status: FC Type error status
397 *
398 * Returns:
399 * error string
400 **/
401static const char *ibmvfc_get_fc_type(u16 status)
402{
403 int i;
404
405 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
406 if (fc_type[i].fc_type == status)
407 return fc_type[i].name;
408
409 return unknown_fc_type;
410}
411
412/**
413 * ibmvfc_set_tgt_action - Set the next init action for the target
414 * @tgt: ibmvfc target struct
415 * @action: action to perform
416 *
ed830385
BK		 417 * Returns:
418 * 0 if action changed / non-zero if not changed
072b91f9 419 **/
ed830385 420static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
072b91f9
BK		 421 enum ibmvfc_target_action action)
422{
ed830385
BK		 423 int rc = -EINVAL;
424
072b91f9 425 switch (tgt->action) {
ed830385
BK		 426 case IBMVFC_TGT_ACTION_LOGOUT_RPORT:
427 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT ||
428 action == IBMVFC_TGT_ACTION_DEL_RPORT) {
429 tgt->action = action;
430 rc = 0;
431 }
432 break;
433 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT:
434 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) {
435 tgt->action = action;
436 rc = 0;
437 }
438 break;
072b91f9 439 case IBMVFC_TGT_ACTION_DEL_RPORT:
ed830385 440 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
d5da3040 441 tgt->action = action;
ed830385
BK		 442 rc = 0;
443 }
d5da3040 444 case IBMVFC_TGT_ACTION_DELETED_RPORT:
072b91f9
BK		 445 break;
446 default:
ed830385 447 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT)
43c8da90 448 tgt->add_rport = 0;
072b91f9 449 tgt->action = action;
ed830385 450 rc = 0;
072b91f9
BK		 451 break;
452 }
ed830385
BK		 453
454 return rc;
072b91f9
BK		 455}
456
457/**
458 * ibmvfc_set_host_state - Set the state for the host
459 * @vhost: ibmvfc host struct
460 * @state: state to set host to
461 *
462 * Returns:
463 * 0 if state changed / non-zero if not changed
464 **/
465static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
466 enum ibmvfc_host_state state)
467{
468 int rc = 0;
469
470 switch (vhost->state) {
471 case IBMVFC_HOST_OFFLINE:
472 rc = -EINVAL;
473 break;
474 default:
475 vhost->state = state;
476 break;
f36cfe6a 477 }
072b91f9
BK		 478
479 return rc;
480}
481
482/**
483 * ibmvfc_set_host_action - Set the next init action for the host
484 * @vhost: ibmvfc host struct
485 * @action: action to perform
486 *
487 **/
488static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
489 enum ibmvfc_host_action action)
490{
491 switch (action) {
492 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
493 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
494 vhost->action = action;
495 break;
79111d08
BK		 496 case IBMVFC_HOST_ACTION_LOGO_WAIT:
497 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
498 vhost->action = action;
499 break;
072b91f9
BK		 500 case IBMVFC_HOST_ACTION_INIT_WAIT:
501 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
502 vhost->action = action;
503 break;
504 case IBMVFC_HOST_ACTION_QUERY:
505 switch (vhost->action) {
506 case IBMVFC_HOST_ACTION_INIT_WAIT:
507 case IBMVFC_HOST_ACTION_NONE:
43c8da90 508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 509 vhost->action = action;
510 break;
511 default:
512 break;
f36cfe6a 513 }
072b91f9
BK		 514 break;
515 case IBMVFC_HOST_ACTION_TGT_INIT:
516 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
517 vhost->action = action;
518 break;
519 case IBMVFC_HOST_ACTION_INIT:
520 case IBMVFC_HOST_ACTION_TGT_DEL:
73ee5d86
BK		 521 switch (vhost->action) {
522 case IBMVFC_HOST_ACTION_RESET:
523 case IBMVFC_HOST_ACTION_REENABLE:
524 break;
525 default:
526 vhost->action = action;
527 break;
f36cfe6a 528 }
73ee5d86
BK		 529 break;
530 case IBMVFC_HOST_ACTION_LOGO:
072b91f9 531 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 532 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 533 case IBMVFC_HOST_ACTION_NONE:
73ee5d86
BK		 534 case IBMVFC_HOST_ACTION_RESET:
535 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 536 default:
537 vhost->action = action;
538 break;
f36cfe6a 539 }
072b91f9
BK		 540}
541
542/**
543 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
544 * @vhost: ibmvfc host struct
545 *
546 * Return value:
547 * nothing
548 **/
549static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
550{
551 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 552 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
553 scsi_block_requests(vhost->host);
554 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
555 }
072b91f9
BK		 556 } else
557 vhost->reinit = 1;
558
559 wake_up(&vhost->work_wait_q);
560}
561
ed830385
BK		 562/**
563 * ibmvfc_del_tgt - Schedule cleanup and removal of the target
564 * @tgt: ibmvfc target struct
565 * @job_step: job step to perform
566 *
567 **/
568static void ibmvfc_del_tgt(struct ibmvfc_target *tgt)
569{
570 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT))
571 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del;
572 wake_up(&tgt->vhost->work_wait_q);
573}
574
072b91f9
BK		 575/**
576 * ibmvfc_link_down - Handle a link down event from the adapter
577 * @vhost: ibmvfc host struct
578 * @state: ibmvfc host state to enter
579 *
580 **/
581static void ibmvfc_link_down(struct ibmvfc_host *vhost,
582 enum ibmvfc_host_state state)
583{
584 struct ibmvfc_target *tgt;
585
586 ENTER;
587 scsi_block_requests(vhost->host);
588 list_for_each_entry(tgt, &vhost->targets, queue)
ed830385 589 ibmvfc_del_tgt(tgt);
072b91f9
BK		 590 ibmvfc_set_host_state(vhost, state);
591 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
592 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
593 wake_up(&vhost->work_wait_q);
594 LEAVE;
595}
596
597/**
598 * ibmvfc_init_host - Start host initialization
599 * @vhost: ibmvfc host struct
600 *
601 * Return value:
602 * nothing
603 **/
861890c6 604static void ibmvfc_init_host(struct ibmvfc_host *vhost)
072b91f9
BK		 605{
606 struct ibmvfc_target *tgt;
607
608 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82 609 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 610 dev_err(vhost->dev,
611 "Host initialization retries exceeded. Taking adapter offline\n");
612 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
613 return;
614 }
615 }
616
617 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
861890c6
BK		 618 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
619 vhost->async_crq.cur = 0;
cf6f10d7 620
072b91f9 621 list_for_each_entry(tgt, &vhost->targets, queue)
ed830385 622 ibmvfc_del_tgt(tgt);
072b91f9
BK		 623 scsi_block_requests(vhost->host);
624 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
625 vhost->job_step = ibmvfc_npiv_login;
626 wake_up(&vhost->work_wait_q);
627 }
628}
629
630/**
631 * ibmvfc_send_crq - Send a CRQ
632 * @vhost: ibmvfc host struct
633 * @word1: the first 64 bits of the data
634 * @word2: the second 64 bits of the data
635 *
636 * Return value:
637 * 0 on success / other on failure
638 **/
639static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
640{
641 struct vio_dev *vdev = to_vio_dev(vhost->dev);
642 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
643}
644
645/**
646 * ibmvfc_send_crq_init - Send a CRQ init message
647 * @vhost: ibmvfc host struct
648 *
649 * Return value:
650 * 0 on success / other on failure
651 **/
652static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
653{
654 ibmvfc_dbg(vhost, "Sending CRQ init\n");
655 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
656}
657
658/**
659 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
660 * @vhost: ibmvfc host struct
661 *
662 * Return value:
663 * 0 on success / other on failure
664 **/
665static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
666{
667 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
668 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
669}
670
671/**
672 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
673 * @vhost: ibmvfc host struct
674 *
675 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
676 * the crq with the hypervisor.
677 **/
678static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
679{
73ee5d86 680 long rc = 0;
072b91f9
BK		 681 struct vio_dev *vdev = to_vio_dev(vhost->dev);
682 struct ibmvfc_crq_queue *crq = &vhost->crq;
683
684 ibmvfc_dbg(vhost, "Releasing CRQ\n");
685 free_irq(vdev->irq, vhost);
039a0898 686 tasklet_kill(&vhost->tasklet);
072b91f9 687 do {
73ee5d86
BK		 688 if (rc)
689 msleep(100);
072b91f9
BK		 690 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
691 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
692
693 vhost->state = IBMVFC_NO_CRQ;
79111d08 694 vhost->logged_in = 0;
072b91f9
BK		 695 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
696 free_page((unsigned long)crq->msgs);
697}
698
699/**
700 * ibmvfc_reenable_crq_queue - reenables the CRQ
701 * @vhost: ibmvfc host struct
702 *
703 * Return value:
704 * 0 on success / other on failure
705 **/
706static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
707{
73ee5d86 708 int rc = 0;
072b91f9
BK		 709 struct vio_dev *vdev = to_vio_dev(vhost->dev);
710
711 /* Re-enable the CRQ */
712 do {
73ee5d86
BK		 713 if (rc)
714 msleep(100);
072b91f9
BK		 715 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
716 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
717
718 if (rc)
719 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
720
721 return rc;
722}
723
724/**
725 * ibmvfc_reset_crq - resets a crq after a failure
726 * @vhost: ibmvfc host struct
727 *
728 * Return value:
729 * 0 on success / other on failure
730 **/
731static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
732{
73ee5d86
BK		 733 int rc = 0;
734 unsigned long flags;
072b91f9
BK		 735 struct vio_dev *vdev = to_vio_dev(vhost->dev);
736 struct ibmvfc_crq_queue *crq = &vhost->crq;
737
738 /* Close the CRQ */
739 do {
73ee5d86
BK		 740 if (rc)
741 msleep(100);
072b91f9
BK		 742 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
743 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
744
73ee5d86 745 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 746 vhost->state = IBMVFC_NO_CRQ;
79111d08 747 vhost->logged_in = 0;
072b91f9
BK		 748
749 /* Clean out the queue */
750 memset(crq->msgs, 0, PAGE_SIZE);
751 crq->cur = 0;
752
753 /* And re-open it again */
754 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
755 crq->msg_token, PAGE_SIZE);
756
757 if (rc == H_CLOSED)
758 /* Adapter is good, but other end is not ready */
759 dev_warn(vhost->dev, "Partner adapter not ready\n");
760 else if (rc != 0)
761 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
73ee5d86 762 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 763
764 return rc;
765}
766
767/**
768 * ibmvfc_valid_event - Determines if event is valid.
769 * @pool: event_pool that contains the event
770 * @evt: ibmvfc event to be checked for validity
771 *
772 * Return value:
773 * 1 if event is valid / 0 if event is not valid
774 **/
775static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
776 struct ibmvfc_event *evt)
777{
778 int index = evt - pool->events;
779 if (index < 0 || index >= pool->size) /* outside of bounds */
780 return 0;
781 if (evt != pool->events + index) /* unaligned */
782 return 0;
783 return 1;
784}
785
786/**
787 * ibmvfc_free_event - Free the specified event
788 * @evt: ibmvfc_event to be freed
789 *
790 **/
791static void ibmvfc_free_event(struct ibmvfc_event *evt)
792{
793 struct ibmvfc_host *vhost = evt->vhost;
794 struct ibmvfc_event_pool *pool = &vhost->pool;
795
796 BUG_ON(!ibmvfc_valid_event(pool, evt));
797 BUG_ON(atomic_inc_return(&evt->free) != 1);
798 list_add_tail(&evt->queue, &vhost->free);
799}
800
801/**
802 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
803 * @evt: ibmvfc event struct
804 *
805 * This function does not setup any error status, that must be done
806 * before this function gets called.
807 **/
808static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
809{
810 struct scsi_cmnd *cmnd = evt->cmnd;
811
812 if (cmnd) {
813 scsi_dma_unmap(cmnd);
814 cmnd->scsi_done(cmnd);
815 }
816
ad8dcffa
BK		 817 if (evt->eh_comp)
818 complete(evt->eh_comp);
819
072b91f9
BK		 820 ibmvfc_free_event(evt);
821}
822
823/**
824 * ibmvfc_fail_request - Fail request with specified error code
825 * @evt: ibmvfc event struct
826 * @error_code: error code to fail request with
827 *
828 * Return value:
829 * none
830 **/
831static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
832{
833 if (evt->cmnd) {
834 evt->cmnd->result = (error_code << 16);
835 evt->done = ibmvfc_scsi_eh_done;
836 } else
0aab6c3f 837 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
072b91f9
BK		 838
839 list_del(&evt->queue);
840 del_timer(&evt->timer);
841 ibmvfc_trc_end(evt);
842 evt->done(evt);
843}
844
845/**
846 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
847 * @vhost: ibmvfc host struct
848 * @error_code: error code to fail requests with
849 *
850 * Return value:
851 * none
852 **/
853static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
854{
855 struct ibmvfc_event *evt, *pos;
856
857 ibmvfc_dbg(vhost, "Purging all requests\n");
858 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
859 ibmvfc_fail_request(evt, error_code);
860}
861
862/**
79111d08 863 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
072b91f9
BK		 864 * @vhost: struct ibmvfc host to reset
865 **/
79111d08 866static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
072b91f9 867{
072b91f9 868 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 869 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
870 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
072b91f9
BK		 871}
872
873/**
79111d08 874 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
072b91f9
BK		 875 * @vhost: struct ibmvfc host to reset
876 **/
79111d08
BK		 877static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
878{
879 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
880 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
881 scsi_block_requests(vhost->host);
882 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
883 vhost->job_step = ibmvfc_npiv_logout;
884 wake_up(&vhost->work_wait_q);
885 } else
886 ibmvfc_hard_reset_host(vhost);
887}
888
889/**
890 * ibmvfc_reset_host - Reset the connection to the server
891 * @vhost: ibmvfc host struct
892 **/
072b91f9
BK		 893static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
894{
895 unsigned long flags;
896
897 spin_lock_irqsave(vhost->host->host_lock, flags);
898 __ibmvfc_reset_host(vhost);
899 spin_unlock_irqrestore(vhost->host->host_lock, flags);
900}
901
902/**
903 * ibmvfc_retry_host_init - Retry host initialization if allowed
904 * @vhost: ibmvfc host struct
905 *
7d0e4622
BK		 906 * Returns: 1 if init will be retried / 0 if not
907 *
072b91f9 908 **/
7d0e4622 909static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
072b91f9 910{
7d0e4622
BK		 911 int retry = 0;
912
072b91f9 913 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82
BK		 914 vhost->delay_init = 1;
915 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 916 dev_err(vhost->dev,
917 "Host initialization retries exceeded. Taking adapter offline\n");
918 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1c41fa82 919 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
072b91f9 920 __ibmvfc_reset_host(vhost);
7d0e4622 921 else {
072b91f9 922 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
7d0e4622
BK		 923 retry = 1;
924 }
072b91f9
BK		 925 }
926
927 wake_up(&vhost->work_wait_q);
7d0e4622 928 return retry;
072b91f9
BK		 929}
930
931/**
b3c10489 932 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 933 * @starget: scsi target struct
934 *
935 * Return value:
936 * ibmvfc_target struct / NULL if not found
937 **/
b3c10489 938static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 939{
940 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
941 struct ibmvfc_host *vhost = shost_priv(shost);
942 struct ibmvfc_target *tgt;
943
944 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 945 if (tgt->target_id == starget->id) {
946 kref_get(&tgt->kref);
072b91f9 947 return tgt;
b3c10489 948 }
072b91f9
BK		 949 return NULL;
950}
951
952/**
b3c10489 953 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 954 * @starget: scsi target struct
955 *
956 * Return value:
957 * ibmvfc_target struct / NULL if not found
958 **/
b3c10489 959static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 960{
961 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
962 struct ibmvfc_target *tgt;
963 unsigned long flags;
964
965 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 966 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 967 spin_unlock_irqrestore(shost->host_lock, flags);
968 return tgt;
969}
970
971/**
972 * ibmvfc_get_host_speed - Get host port speed
973 * @shost: scsi host struct
974 *
975 * Return value:
976 * none
977 **/
978static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
979{
980 struct ibmvfc_host *vhost = shost_priv(shost);
981 unsigned long flags;
982
983 spin_lock_irqsave(shost->host_lock, flags);
984 if (vhost->state == IBMVFC_ACTIVE) {
0aab6c3f 985 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
072b91f9
BK		 986 case 1:
987 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
988 break;
989 case 2:
990 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
991 break;
992 case 4:
993 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
994 break;
995 case 8:
996 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
997 break;
998 case 10:
999 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
1000 break;
1001 case 16:
1002 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
1003 break;
1004 default:
775a42ec 1005 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
0aab6c3f 1006 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
072b91f9
BK		 1007 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1008 break;
1009 }
1010 } else
1011 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1012 spin_unlock_irqrestore(shost->host_lock, flags);
1013}
1014
1015/**
1016 * ibmvfc_get_host_port_state - Get host port state
1017 * @shost: scsi host struct
1018 *
1019 * Return value:
1020 * none
1021 **/
1022static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1023{
1024 struct ibmvfc_host *vhost = shost_priv(shost);
1025 unsigned long flags;
1026
1027 spin_lock_irqsave(shost->host_lock, flags);
1028 switch (vhost->state) {
1029 case IBMVFC_INITIALIZING:
1030 case IBMVFC_ACTIVE:
1031 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1032 break;
1033 case IBMVFC_LINK_DOWN:
1034 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1035 break;
1036 case IBMVFC_LINK_DEAD:
1037 case IBMVFC_HOST_OFFLINE:
1038 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1039 break;
1040 case IBMVFC_HALTED:
1041 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1042 break;
0ae808e0
BK		 1043 case IBMVFC_NO_CRQ:
1044 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1045 break;
072b91f9
BK		 1046 default:
1047 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1048 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1049 break;
1050 }
1051 spin_unlock_irqrestore(shost->host_lock, flags);
1052}
1053
1054/**
1055 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1056 * @rport: rport struct
1057 * @timeout: timeout value
1058 *
1059 * Return value:
1060 * none
1061 **/
1062static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1063{
1064 if (timeout)
1065 rport->dev_loss_tmo = timeout;
1066 else
1067 rport->dev_loss_tmo = 1;
1068}
1069
b3c10489
BK		 1070/**
1071 * ibmvfc_release_tgt - Free memory allocated for a target
1072 * @kref: kref struct
1073 *
1074 **/
1075static void ibmvfc_release_tgt(struct kref *kref)
1076{
1077 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1078 kfree(tgt);
1079}
1080
072b91f9
BK		 1081/**
1082 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1083 * @starget: scsi target struct
1084 *
1085 * Return value:
1086 * none
1087 **/
1088static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1089{
b3c10489 1090 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1091 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1092 if (tgt)
1093 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1094}
1095
1096/**
1097 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1098 * @starget: scsi target struct
1099 *
1100 * Return value:
1101 * none
1102 **/
1103static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1104{
b3c10489 1105 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1106 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1107 if (tgt)
1108 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1109}
1110
1111/**
1112 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1113 * @starget: scsi target struct
1114 *
1115 * Return value:
1116 * none
1117 **/
1118static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1119{
b3c10489 1120 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1121 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1122 if (tgt)
1123 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1124}
1125
1126/**
1127 * ibmvfc_wait_while_resetting - Wait while the host resets
1128 * @vhost: ibmvfc host struct
1129 *
1130 * Return value:
1131 * 0 on success / other on failure
1132 **/
1133static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1134{
1135 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1136 ((vhost->state == IBMVFC_ACTIVE ||
1137 vhost->state == IBMVFC_HOST_OFFLINE ||
1138 vhost->state == IBMVFC_LINK_DEAD) &&
1139 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1140 (init_timeout * HZ));
1141
1142 return timeout ? 0 : -EIO;
1143}
1144
1145/**
1146 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1147 * @shost: scsi host struct
1148 *
1149 * Return value:
1150 * 0 on success / other on failure
1151 **/
1152static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1153{
1154 struct ibmvfc_host *vhost = shost_priv(shost);
1155
1156 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1157 ibmvfc_reset_host(vhost);
1158 return ibmvfc_wait_while_resetting(vhost);
1159}
1160
1161/**
1162 * ibmvfc_gather_partition_info - Gather info about the LPAR
1163 *
1164 * Return value:
1165 * none
1166 **/
1167static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1168{
1169 struct device_node *rootdn;
1170 const char *name;
1171 const unsigned int *num;
1172
1173 rootdn = of_find_node_by_path("/");
1174 if (!rootdn)
1175 return;
1176
1177 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1178 if (name)
1179 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1180 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1181 if (num)
1182 vhost->partition_number = *num;
1183 of_node_put(rootdn);
1184}
1185
1186/**
1187 * ibmvfc_set_login_info - Setup info for NPIV login
1188 * @vhost: ibmvfc host struct
1189 *
1190 * Return value:
1191 * none
1192 **/
1193static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1194{
1195 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
61c7a080 1196 struct device_node *of_node = vhost->dev->of_node;
072b91f9
BK		 1197 const char *location;
1198
1199 memset(login_info, 0, sizeof(*login_info));
1200
0aab6c3f
TD		 1201 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1202 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1203 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1204 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1205 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1206 login_info->vfc_frame_version = cpu_to_be32(1);
1207 login_info->fcp_version = cpu_to_be16(3);
1208 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
072b91f9 1209 if (vhost->client_migrated)
0aab6c3f 1210 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
072b91f9 1211
0aab6c3f
TD		 1212 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1213 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1214 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1215 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
072b91f9
BK		 1216 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1217 strncpy(login_info->device_name,
71610f55 1218 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
072b91f9
BK		 1219
1220 location = of_get_property(of_node, "ibm,loc-code", NULL);
71610f55 1221 location = location ? location : dev_name(vhost->dev);
072b91f9
BK		 1222 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1223}
1224
1225/**
1226 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1227 * @vhost: ibmvfc host who owns the event pool
1228 *
1229 * Returns zero on success.
1230 **/
1231static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1232{
1233 int i;
1234 struct ibmvfc_event_pool *pool = &vhost->pool;
1235
1236 ENTER;
1237 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1238 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1239 if (!pool->events)
1240 return -ENOMEM;
1241
1242 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1243 pool->size * sizeof(*pool->iu_storage),
1244 &pool->iu_token, 0);
1245
1246 if (!pool->iu_storage) {
1247 kfree(pool->events);
1248 return -ENOMEM;
1249 }
1250
1251 for (i = 0; i < pool->size; ++i) {
1252 struct ibmvfc_event *evt = &pool->events[i];
1253 atomic_set(&evt->free, 1);
1254 evt->crq.valid = 0x80;
0aab6c3f 1255 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
072b91f9
BK		 1256 evt->xfer_iu = pool->iu_storage + i;
1257 evt->vhost = vhost;
1258 evt->ext_list = NULL;
1259 list_add_tail(&evt->queue, &vhost->free);
1260 }
1261
1262 LEAVE;
1263 return 0;
1264}
1265
1266/**
1267 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1268 * @vhost: ibmvfc host who owns the event pool
1269 *
1270 **/
1271static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1272{
1273 int i;
1274 struct ibmvfc_event_pool *pool = &vhost->pool;
1275
1276 ENTER;
1277 for (i = 0; i < pool->size; ++i) {
1278 list_del(&pool->events[i].queue);
1279 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1280 if (pool->events[i].ext_list)
1281 dma_pool_free(vhost->sg_pool,
1282 pool->events[i].ext_list,
1283 pool->events[i].ext_list_token);
1284 }
1285
1286 kfree(pool->events);
1287 dma_free_coherent(vhost->dev,
1288 pool->size * sizeof(*pool->iu_storage),
1289 pool->iu_storage, pool->iu_token);
1290 LEAVE;
1291}
1292
1293/**
1294 * ibmvfc_get_event - Gets the next free event in pool
1295 * @vhost: ibmvfc host struct
1296 *
1297 * Returns a free event from the pool.
1298 **/
1299static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1300{
1301 struct ibmvfc_event *evt;
1302
1303 BUG_ON(list_empty(&vhost->free));
1304 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1305 atomic_set(&evt->free, 0);
1306 list_del(&evt->queue);
1307 return evt;
1308}
1309
1310/**
1311 * ibmvfc_init_event - Initialize fields in an event struct that are always
1312 * required.
1313 * @evt: The event
1314 * @done: Routine to call when the event is responded to
1315 * @format: SRP or MAD format
1316 **/
1317static void ibmvfc_init_event(struct ibmvfc_event *evt,
1318 void (*done) (struct ibmvfc_event *), u8 format)
1319{
1320 evt->cmnd = NULL;
1321 evt->sync_iu = NULL;
1322 evt->crq.format = format;
1323 evt->done = done;
ad8dcffa 1324 evt->eh_comp = NULL;
072b91f9
BK		 1325}
1326
1327/**
1328 * ibmvfc_map_sg_list - Initialize scatterlist
1329 * @scmd: scsi command struct
1330 * @nseg: number of scatterlist segments
1331 * @md: memory descriptor list to initialize
1332 **/
1333static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1334 struct srp_direct_buf *md)
1335{
1336 int i;
1337 struct scatterlist *sg;
1338
1339 scsi_for_each_sg(scmd, sg, nseg, i) {
0aab6c3f
TD		 1340 md[i].va = cpu_to_be64(sg_dma_address(sg));
1341 md[i].len = cpu_to_be32(sg_dma_len(sg));
072b91f9
BK		 1342 md[i].key = 0;
1343 }
1344}
1345
1346/**
1347 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
91ebc1fa 1348 * @scmd: struct scsi_cmnd with the scatterlist
072b91f9
BK		 1349 * @evt: ibmvfc event struct
1350 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1351 * @dev: device for which to map dma memory
1352 *
1353 * Returns:
1354 * 0 on success / non-zero on failure
1355 **/
1356static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1357 struct ibmvfc_event *evt,
1358 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1359{
1360
1361 int sg_mapped;
1362 struct srp_direct_buf *data = &vfc_cmd->ioba;
1363 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1364
a6104b1e
TD		 1365 if (cls3_error)
1366 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1367
072b91f9
BK		 1368 sg_mapped = scsi_dma_map(scmd);
1369 if (!sg_mapped) {
0aab6c3f 1370 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
072b91f9
BK		 1371 return 0;
1372 } else if (unlikely(sg_mapped < 0)) {
1373 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1374 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1375 return sg_mapped;
1376 }
1377
1378 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
0aab6c3f 1379 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
072b91f9
BK		 1380 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1381 } else {
0aab6c3f 1382 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
072b91f9
BK		 1383 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1384 }
1385
1386 if (sg_mapped == 1) {
1387 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1388 return 0;
1389 }
1390
0aab6c3f 1391 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
072b91f9
BK		 1392
1393 if (!evt->ext_list) {
1394 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1395 &evt->ext_list_token);
1396
1397 if (!evt->ext_list) {
64b840dd
BK		 1398 scsi_dma_unmap(scmd);
1399 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1400 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
072b91f9
BK		 1401 return -ENOMEM;
1402 }
1403 }
1404
1405 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1406
0aab6c3f
TD		 1407 data->va = cpu_to_be64(evt->ext_list_token);
1408 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
072b91f9
BK		 1409 data->key = 0;
1410 return 0;
1411}
1412
1413/**
1414 * ibmvfc_timeout - Internal command timeout handler
1415 * @evt: struct ibmvfc_event that timed out
1416 *
1417 * Called when an internally generated command times out
1418 **/
9a5d04fc 1419static void ibmvfc_timeout(struct timer_list *t)
072b91f9 1420{
9a5d04fc 1421 struct ibmvfc_event *evt = from_timer(evt, t, timer);
072b91f9
BK		 1422 struct ibmvfc_host *vhost = evt->vhost;
1423 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1424 ibmvfc_reset_host(vhost);
1425}
1426
1427/**
1428 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1429 * @evt: event to be sent
1430 * @vhost: ibmvfc host struct
1431 * @timeout: timeout in seconds - 0 means do not time command
1432 *
1433 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1434 **/
1435static int ibmvfc_send_event(struct ibmvfc_event *evt,
1436 struct ibmvfc_host *vhost, unsigned long timeout)
1437{
0aab6c3f 1438 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
072b91f9
BK		 1439 int rc;
1440
1441 /* Copy the IU into the transfer area */
1442 *evt->xfer_iu = evt->iu;
1443 if (evt->crq.format == IBMVFC_CMD_FORMAT)
0aab6c3f 1444 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
072b91f9 1445 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
0aab6c3f 1446 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
072b91f9
BK		 1447 else
1448 BUG();
1449
1450 list_add_tail(&evt->queue, &vhost->sent);
9a5d04fc 1451 timer_setup(&evt->timer, ibmvfc_timeout, 0);
072b91f9
BK		 1452
1453 if (timeout) {
072b91f9 1454 evt->timer.expires = jiffies + (timeout * HZ);
072b91f9
BK		 1455 add_timer(&evt->timer);
1456 }
1457
a528ab7a
BK		 1458 mb();
1459
0aab6c3f
TD		 1460 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1461 be64_to_cpu(crq_as_u64[1])))) {
072b91f9
BK		 1462 list_del(&evt->queue);
1463 del_timer(&evt->timer);
1464
1465 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1466 * Firmware will send a CRQ with a transport event (0xFF) to
1467 * tell this client what has happened to the transport. This
1468 * will be handled in ibmvfc_handle_crq()
1469 */
1470 if (rc == H_CLOSED) {
1471 if (printk_ratelimit())
1472 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1473 if (evt->cmnd)
1474 scsi_dma_unmap(evt->cmnd);
1475 ibmvfc_free_event(evt);
1476 return SCSI_MLQUEUE_HOST_BUSY;
1477 }
1478
1479 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1480 if (evt->cmnd) {
1481 evt->cmnd->result = DID_ERROR << 16;
1482 evt->done = ibmvfc_scsi_eh_done;
1483 } else
0aab6c3f 1484 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
072b91f9
BK		 1485
1486 evt->done(evt);
1487 } else
1488 ibmvfc_trc_start(evt);
1489
1490 return 0;
1491}
1492
1493/**
1494 * ibmvfc_log_error - Log an error for the failed command if appropriate
1495 * @evt: ibmvfc event to log
1496 *
1497 **/
1498static void ibmvfc_log_error(struct ibmvfc_event *evt)
1499{
1500 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1501 struct ibmvfc_host *vhost = evt->vhost;
1502 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1503 struct scsi_cmnd *cmnd = evt->cmnd;
1504 const char *err = unknown_error;
0aab6c3f 1505 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 1506 int logerr = 0;
1507 int rsp_code = 0;
1508
1509 if (index >= 0) {
1510 logerr = cmd_status[index].log;
1511 err = cmd_status[index].name;
1512 }
1513
0ae808e0 1514 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1515 return;
1516
1517 if (rsp->flags & FCP_RSP_LEN_VALID)
1518 rsp_code = rsp->data.info.rsp_code;
1519
6dc6a944 1520 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
072b91f9 1521 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
3e6f7de4 1522 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error),
072b91f9
BK		 1523 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1524}
1525
6d29cc56
BK		 1526/**
1527 * ibmvfc_relogin - Log back into the specified device
1528 * @sdev: scsi device struct
1529 *
1530 **/
1531static void ibmvfc_relogin(struct scsi_device *sdev)
1532{
1533 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1534 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1535 struct ibmvfc_target *tgt;
1536
1537 list_for_each_entry(tgt, &vhost->targets, queue) {
1538 if (rport == tgt->rport) {
ed830385 1539 ibmvfc_del_tgt(tgt);
6d29cc56
BK		 1540 break;
1541 }
1542 }
1543
1544 ibmvfc_reinit_host(vhost);
1545}
1546
072b91f9
BK		 1547/**
1548 * ibmvfc_scsi_done - Handle responses from commands
1549 * @evt: ibmvfc event to be handled
1550 *
1551 * Used as a callback when sending scsi cmds.
1552 **/
1553static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1554{
1555 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1556 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1557 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d 1558 u32 rsp_len = 0;
0aab6c3f 1559 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
072b91f9
BK		 1560
1561 if (cmnd) {
0aab6c3f
TD		 1562 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1563 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
072b91f9 1564 else if (rsp->flags & FCP_RESID_UNDER)
0aab6c3f 1565 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
072b91f9
BK		 1566 else
1567 scsi_set_resid(cmnd, 0);
1568
1569 if (vfc_cmd->status) {
1570 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1571
1572 if (rsp->flags & FCP_RSP_LEN_VALID)
0aab6c3f 1573 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 1574 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1575 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1576 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9 1577 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
0aab6c3f
TD		 1578 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1579 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
6d29cc56 1580 ibmvfc_relogin(cmnd->device);
072b91f9 1581
50119dad
BK		 1582 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1583 cmnd->result = (DID_ERROR << 16);
1584
072b91f9
BK		 1585 ibmvfc_log_error(evt);
1586 }
1587
1588 if (!cmnd->result &&
1589 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1590 cmnd->result = (DID_ERROR << 16);
1591
1592 scsi_dma_unmap(cmnd);
1593 cmnd->scsi_done(cmnd);
1594 }
1595
ad8dcffa
BK		 1596 if (evt->eh_comp)
1597 complete(evt->eh_comp);
1598
072b91f9
BK		 1599 ibmvfc_free_event(evt);
1600}
1601
1602/**
1603 * ibmvfc_host_chkready - Check if the host can accept commands
1604 * @vhost: struct ibmvfc host
1605 *
1606 * Returns:
1607 * 1 if host can accept command / 0 if not
1608 **/
1609static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1610{
1611 int result = 0;
1612
1613 switch (vhost->state) {
1614 case IBMVFC_LINK_DEAD:
1615 case IBMVFC_HOST_OFFLINE:
1616 result = DID_NO_CONNECT << 16;
1617 break;
1618 case IBMVFC_NO_CRQ:
1619 case IBMVFC_INITIALIZING:
1620 case IBMVFC_HALTED:
1621 case IBMVFC_LINK_DOWN:
1622 result = DID_REQUEUE << 16;
1623 break;
1624 case IBMVFC_ACTIVE:
1625 result = 0;
1626 break;
f36cfe6a 1627 }
072b91f9
BK		 1628
1629 return result;
1630}
1631
1632/**
1633 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1634 * @cmnd: struct scsi_cmnd to be executed
1635 * @done: Callback function to be called when cmnd is completed
1636 *
1637 * Returns:
1638 * 0 on success / other on failure
1639 **/
f281233d 1640static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
072b91f9
BK		 1641 void (*done) (struct scsi_cmnd *))
1642{
1643 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1644 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1645 struct ibmvfc_cmd *vfc_cmd;
1646 struct ibmvfc_event *evt;
072b91f9
BK		 1647 int rc;
1648
1649 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1650 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1651 cmnd->result = rc;
1652 done(cmnd);
1653 return 0;
1654 }
1655
1656 cmnd->result = (DID_OK << 16);
1657 evt = ibmvfc_get_event(vhost);
1658 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1659 evt->cmnd = cmnd;
1660 cmnd->scsi_done = done;
1661 vfc_cmd = &evt->iu.cmd;
1662 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
0aab6c3f
TD		 1663 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1664 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1665 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1666 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1667 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1668 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1669 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1670 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
072b91f9
BK		 1671 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1672 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1673
50668633
CH		 1674 if (cmnd->flags & SCMD_TAGGED) {
1675 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1676 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
072b91f9
BK		 1677 }
1678
1679 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1680 return ibmvfc_send_event(evt, vhost, 0);
1681
1682 ibmvfc_free_event(evt);
1683 if (rc == -ENOMEM)
1684 return SCSI_MLQUEUE_HOST_BUSY;
1685
1686 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1687 scmd_printk(KERN_ERR, cmnd,
1688 "Failed to map DMA buffer for command. rc=%d\n", rc);
1689
1690 cmnd->result = DID_ERROR << 16;
1691 done(cmnd);
1692 return 0;
1693}
1694
f281233d
JG		 1695static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1696
072b91f9
BK		 1697/**
1698 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1699 * @evt: ibmvfc event struct
1700 *
1701 **/
1702static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1703{
1704 /* copy the response back */
1705 if (evt->sync_iu)
1706 *evt->sync_iu = *evt->xfer_iu;
1707
1708 complete(&evt->comp);
1709}
1710
d31429e1
BK		 1711/**
1712 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1713 * @evt: struct ibmvfc_event
1714 *
1715 **/
1716static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1717{
1718 struct ibmvfc_host *vhost = evt->vhost;
1719
1720 ibmvfc_free_event(evt);
1721 vhost->aborting_passthru = 0;
1722 dev_info(vhost->dev, "Passthru command cancelled\n");
1723}
1724
1725/**
1726 * ibmvfc_bsg_timeout - Handle a BSG timeout
75cc8cfc 1727 * @job: struct bsg_job that timed out
d31429e1
BK		 1728 *
1729 * Returns:
1730 * 0 on success / other on failure
1731 **/
75cc8cfc 1732static int ibmvfc_bsg_timeout(struct bsg_job *job)
d31429e1 1733{
cd21c605 1734 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
d31429e1
BK		 1735 unsigned long port_id = (unsigned long)job->dd_data;
1736 struct ibmvfc_event *evt;
1737 struct ibmvfc_tmf *tmf;
1738 unsigned long flags;
1739 int rc;
1740
1741 ENTER;
1742 spin_lock_irqsave(vhost->host->host_lock, flags);
1743 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1744 __ibmvfc_reset_host(vhost);
1745 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1746 return 0;
1747 }
1748
1749 vhost->aborting_passthru = 1;
1750 evt = ibmvfc_get_event(vhost);
1751 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1752
1753 tmf = &evt->iu.tmf;
1754 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1755 tmf->common.version = cpu_to_be32(1);
1756 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1757 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1758 tmf->scsi_id = cpu_to_be64(port_id);
1759 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1760 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
d31429e1
BK		 1761 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1762
1763 if (rc != 0) {
1764 vhost->aborting_passthru = 0;
1765 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1766 rc = -EIO;
1767 } else
1768 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1769 port_id);
1770
1771 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1772
1773 LEAVE;
1774 return rc;
1775}
1776
1777/**
1778 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1779 * @vhost: struct ibmvfc_host to send command
1780 * @port_id: port ID to send command
1781 *
1782 * Returns:
1783 * 0 on success / other on failure
1784 **/
1785static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1786{
1787 struct ibmvfc_port_login *plogi;
1788 struct ibmvfc_target *tgt;
1789 struct ibmvfc_event *evt;
1790 union ibmvfc_iu rsp_iu;
1791 unsigned long flags;
1792 int rc = 0, issue_login = 1;
1793
1794 ENTER;
1795 spin_lock_irqsave(vhost->host->host_lock, flags);
1796 list_for_each_entry(tgt, &vhost->targets, queue) {
1797 if (tgt->scsi_id == port_id) {
1798 issue_login = 0;
1799 break;
1800 }
1801 }
1802
1803 if (!issue_login)
1804 goto unlock_out;
1805 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1806 goto unlock_out;
1807
1808 evt = ibmvfc_get_event(vhost);
1809 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1810 plogi = &evt->iu.plogi;
1811 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 1812 plogi->common.version = cpu_to_be32(1);
1813 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1814 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1815 plogi->scsi_id = cpu_to_be64(port_id);
d31429e1
BK		 1816 evt->sync_iu = &rsp_iu;
1817 init_completion(&evt->comp);
1818
1819 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1820 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1821
1822 if (rc)
1823 return -EIO;
1824
1825 wait_for_completion(&evt->comp);
1826
1827 if (rsp_iu.plogi.common.status)
1828 rc = -EIO;
1829
1830 spin_lock_irqsave(vhost->host->host_lock, flags);
1831 ibmvfc_free_event(evt);
1832unlock_out:
1833 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1834 LEAVE;
1835 return rc;
1836}
1837
1838/**
1839 * ibmvfc_bsg_request - Handle a BSG request
75cc8cfc 1840 * @job: struct bsg_job to be executed
d31429e1
BK		 1841 *
1842 * Returns:
1843 * 0 on success / other on failure
1844 **/
75cc8cfc 1845static int ibmvfc_bsg_request(struct bsg_job *job)
d31429e1 1846{
cd21c605 1847 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1d69b122 1848 struct fc_rport *rport = fc_bsg_to_rport(job);
d31429e1
BK		 1849 struct ibmvfc_passthru_mad *mad;
1850 struct ibmvfc_event *evt;
1851 union ibmvfc_iu rsp_iu;
1852 unsigned long flags, port_id = -1;
01e0e15c
JT		 1853 struct fc_bsg_request *bsg_request = job->request;
1854 struct fc_bsg_reply *bsg_reply = job->reply;
1855 unsigned int code = bsg_request->msgcode;
d31429e1
BK		 1856 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1857 u32 fc_flags, rsp_len;
1858
1859 ENTER;
01e0e15c 1860 bsg_reply->reply_payload_rcv_len = 0;
d31429e1
BK		 1861 if (rport)
1862 port_id = rport->port_id;
1863
1864 switch (code) {
1865 case FC_BSG_HST_ELS_NOLOGIN:
01e0e15c
JT		 1866 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
1867 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
1868 bsg_request->rqst_data.h_els.port_id[2];
4c735987 1869 /* fall through */
d31429e1
BK		 1870 case FC_BSG_RPT_ELS:
1871 fc_flags = IBMVFC_FC_ELS;
1872 break;
1873 case FC_BSG_HST_CT:
1874 issue_login = 1;
01e0e15c
JT		 1875 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
1876 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
1877 bsg_request->rqst_data.h_ct.port_id[2];
4c735987 1878 /* fall through */
d31429e1
BK		 1879 case FC_BSG_RPT_CT:
1880 fc_flags = IBMVFC_FC_CT_IU;
1881 break;
1882 default:
1883 return -ENOTSUPP;
f36cfe6a 1884 }
d31429e1
BK		 1885
1886 if (port_id == -1)
1887 return -EINVAL;
1888 if (!mutex_trylock(&vhost->passthru_mutex))
1889 return -EBUSY;
1890
1891 job->dd_data = (void *)port_id;
1892 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1893 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1894
1895 if (!req_seg) {
1896 mutex_unlock(&vhost->passthru_mutex);
1897 return -ENOMEM;
1898 }
1899
1900 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1901 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1902
1903 if (!rsp_seg) {
1904 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1905 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1906 mutex_unlock(&vhost->passthru_mutex);
1907 return -ENOMEM;
1908 }
1909
1910 if (req_seg > 1 || rsp_seg > 1) {
1911 rc = -EINVAL;
1912 goto out;
1913 }
1914
1915 if (issue_login)
1916 rc = ibmvfc_bsg_plogi(vhost, port_id);
1917
1918 spin_lock_irqsave(vhost->host->host_lock, flags);
1919
1920 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1921 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1922 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1923 goto out;
1924 }
1925
1926 evt = ibmvfc_get_event(vhost);
1927 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1928 mad = &evt->iu.passthru;
1929
1930 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 1931 mad->common.version = cpu_to_be32(1);
1932 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1933 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1934
1935 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1936 offsetof(struct ibmvfc_passthru_mad, iu));
1937 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1938
1939 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1940 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1941 mad->iu.flags = cpu_to_be32(fc_flags);
1942 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1943
1944 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1945 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1946 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1947 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1948 mad->iu.scsi_id = cpu_to_be64(port_id);
1949 mad->iu.tag = cpu_to_be64((u64)evt);
1950 rsp_len = be32_to_cpu(mad->iu.rsp.len);
d31429e1
BK		 1951
1952 evt->sync_iu = &rsp_iu;
1953 init_completion(&evt->comp);
1954 rc = ibmvfc_send_event(evt, vhost, 0);
1955 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1956
1957 if (rc) {
1958 rc = -EIO;
1959 goto out;
1960 }
1961
1962 wait_for_completion(&evt->comp);
1963
1964 if (rsp_iu.passthru.common.status)
1965 rc = -EIO;
1966 else
01e0e15c 1967 bsg_reply->reply_payload_rcv_len = rsp_len;
d31429e1
BK		 1968
1969 spin_lock_irqsave(vhost->host->host_lock, flags);
1970 ibmvfc_free_event(evt);
1971 spin_unlock_irqrestore(vhost->host->host_lock, flags);
01e0e15c 1972 bsg_reply->result = rc;
06548160 1973 bsg_job_done(job, bsg_reply->result,
1abaede7 1974 bsg_reply->reply_payload_rcv_len);
d31429e1
BK		 1975 rc = 0;
1976out:
1977 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1978 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1979 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1980 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1981 mutex_unlock(&vhost->passthru_mutex);
1982 LEAVE;
1983 return rc;
1984}
1985
072b91f9
BK		 1986/**
1987 * ibmvfc_reset_device - Reset the device with the specified reset type
1988 * @sdev: scsi device to reset
1989 * @type: reset type
1990 * @desc: reset type description for log messages
1991 *
1992 * Returns:
1993 * 0 on success / other on failure
1994 **/
1995static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1996{
1997 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1998 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1999 struct ibmvfc_cmd *tmf;
50ed9a00 2000 struct ibmvfc_event *evt = NULL;
072b91f9
BK		 2001 union ibmvfc_iu rsp_iu;
2002 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2003 int rsp_rc = -EBUSY;
2004 unsigned long flags;
2005 int rsp_code = 0;
2006
2007 spin_lock_irqsave(vhost->host->host_lock, flags);
2008 if (vhost->state == IBMVFC_ACTIVE) {
2009 evt = ibmvfc_get_event(vhost);
2010 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2011
2012 tmf = &evt->iu.cmd;
2013 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2014 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2015 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2016 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2017 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2018 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2019 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2020 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
072b91f9 2021 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 2022 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
072b91f9
BK		 2023 tmf->iu.tmf_flags = type;
2024 evt->sync_iu = &rsp_iu;
2025
2026 init_completion(&evt->comp);
2027 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2028 }
2029 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2030
2031 if (rsp_rc != 0) {
2032 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2033 desc, rsp_rc);
2034 return -EIO;
2035 }
2036
2037 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2038 wait_for_completion(&evt->comp);
2039
230934a6
BK		 2040 if (rsp_iu.cmd.status)
2041 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2042
2043 if (rsp_code) {
072b91f9
BK		 2044 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2045 rsp_code = fc_rsp->data.info.rsp_code;
2046
2047 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
0aab6c3f
TD		 2048 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2049 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
3e6f7de4 2050 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
072b91f9
BK		 2051 fc_rsp->scsi_status);
2052 rsp_rc = -EIO;
2053 } else
2054 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2055
2056 spin_lock_irqsave(vhost->host->host_lock, flags);
2057 ibmvfc_free_event(evt);
2058 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2059 return rsp_rc;
2060}
2061
2062/**
d2fab5cf
BK		 2063 * ibmvfc_match_rport - Match function for specified remote port
2064 * @evt: ibmvfc event struct
2065 * @device: device to match (rport)
072b91f9
BK		 2066 *
2067 * Returns:
d2fab5cf 2068 * 1 if event matches rport / 0 if event does not match rport
072b91f9 2069 **/
d2fab5cf 2070static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
072b91f9 2071{
d2fab5cf 2072 struct fc_rport *cmd_rport;
072b91f9 2073
d2fab5cf
BK		 2074 if (evt->cmnd) {
2075 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2076 if (cmd_rport == rport)
2077 return 1;
072b91f9 2078 }
d2fab5cf
BK		 2079 return 0;
2080}
072b91f9 2081
d2fab5cf
BK		 2082/**
2083 * ibmvfc_match_target - Match function for specified target
2084 * @evt: ibmvfc event struct
2085 * @device: device to match (starget)
2086 *
2087 * Returns:
2088 * 1 if event matches starget / 0 if event does not match starget
2089 **/
2090static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2091{
2092 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2093 return 1;
2094 return 0;
2095}
072b91f9 2096
d2fab5cf
BK		 2097/**
2098 * ibmvfc_match_lun - Match function for specified LUN
2099 * @evt: ibmvfc event struct
2100 * @device: device to match (sdev)
2101 *
2102 * Returns:
2103 * 1 if event matches sdev / 0 if event does not match sdev
2104 **/
2105static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2106{
2107 if (evt->cmnd && evt->cmnd->device == device)
2108 return 1;
2109 return 0;
2110}
072b91f9 2111
d2fab5cf
BK		 2112/**
2113 * ibmvfc_wait_for_ops - Wait for ops to complete
2114 * @vhost: ibmvfc host struct
2115 * @device: device to match (starget or sdev)
2116 * @match: match function
2117 *
2118 * Returns:
2119 * SUCCESS / FAILED
2120 **/
2121static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2122 int (*match) (struct ibmvfc_event *, void *))
2123{
2124 struct ibmvfc_event *evt;
2125 DECLARE_COMPLETION_ONSTACK(comp);
2126 int wait;
2127 unsigned long flags;
2128 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
072b91f9 2129
d2fab5cf
BK		 2130 ENTER;
2131 do {
2132 wait = 0;
2133 spin_lock_irqsave(vhost->host->host_lock, flags);
2134 list_for_each_entry(evt, &vhost->sent, queue) {
2135 if (match(evt, device)) {
2136 evt->eh_comp = &comp;
2137 wait++;
2138 }
2139 }
2140 spin_unlock_irqrestore(vhost->host->host_lock, flags);
230934a6 2141
d2fab5cf
BK		 2142 if (wait) {
2143 timeout = wait_for_completion_timeout(&comp, timeout);
072b91f9 2144
d2fab5cf
BK		 2145 if (!timeout) {
2146 wait = 0;
2147 spin_lock_irqsave(vhost->host->host_lock, flags);
2148 list_for_each_entry(evt, &vhost->sent, queue) {
2149 if (match(evt, device)) {
2150 evt->eh_comp = NULL;
2151 wait++;
2152 }
2153 }
2154 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2155 if (wait)
2156 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2157 LEAVE;
2158 return wait ? FAILED : SUCCESS;
2159 }
2160 }
2161 } while (wait);
072b91f9 2162
d2fab5cf
BK		 2163 LEAVE;
2164 return SUCCESS;
072b91f9
BK		 2165}
2166
2167/**
2168 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2169 * @sdev: scsi device to cancel commands
2170 * @type: type of error recovery being performed
2171 *
2172 * This sends a cancel to the VIOS for the specified device. This does
2173 * NOT send any abort to the actual device. That must be done separately.
2174 *
2175 * Returns:
2176 * 0 on success / other on failure
2177 **/
2178static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2179{
2180 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 2181 struct scsi_target *starget = scsi_target(sdev);
2182 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 2183 struct ibmvfc_tmf *tmf;
2184 struct ibmvfc_event *evt, *found_evt;
2185 union ibmvfc_iu rsp;
2186 int rsp_rc = -EBUSY;
2187 unsigned long flags;
2188 u16 status;
2189
2190 ENTER;
2191 spin_lock_irqsave(vhost->host->host_lock, flags);
2192 found_evt = NULL;
2193 list_for_each_entry(evt, &vhost->sent, queue) {
2194 if (evt->cmnd && evt->cmnd->device == sdev) {
2195 found_evt = evt;
2196 break;
2197 }
2198 }
2199
2200 if (!found_evt) {
2201 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2202 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2203 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2204 return 0;
2205 }
2206
55d29bf0 2207 if (vhost->logged_in) {
072b91f9
BK		 2208 evt = ibmvfc_get_event(vhost);
2209 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2210
2211 tmf = &evt->iu.tmf;
2212 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2213 tmf->common.version = cpu_to_be32(1);
2214 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2215 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2216 tmf->scsi_id = cpu_to_be64(rport->port_id);
072b91f9 2217 int_to_scsilun(sdev->lun, &tmf->lun);
0aab6c3f 2218 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
90f725db 2219 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
55d29bf0 2220 if (vhost->state == IBMVFC_ACTIVE)
0aab6c3f 2221 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
55d29bf0 2222 else
0aab6c3f
TD		 2223 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2224 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2225 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
072b91f9
BK		 2226
2227 evt->sync_iu = &rsp;
2228 init_completion(&evt->comp);
2229 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2230 }
2231
2232 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2233
2234 if (rsp_rc != 0) {
2235 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
c281e32a
BK		 2236 /* If failure is received, the host adapter is most likely going
2237 through reset, return success so the caller will wait for the command
2238 being cancelled to get returned */
2239 return 0;
072b91f9
BK		 2240 }
2241
2242 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2243
2244 wait_for_completion(&evt->comp);
0aab6c3f 2245 status = be16_to_cpu(rsp.mad_common.status);
072b91f9
BK		 2246 spin_lock_irqsave(vhost->host->host_lock, flags);
2247 ibmvfc_free_event(evt);
2248 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2249
2250 if (status != IBMVFC_MAD_SUCCESS) {
2251 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
c281e32a
BK		 2252 switch (status) {
2253 case IBMVFC_MAD_DRIVER_FAILED:
2254 case IBMVFC_MAD_CRQ_ERROR:
2255 /* Host adapter most likely going through reset, return success to
2256 the caller will wait for the command being cancelled to get returned */
2257 return 0;
2258 default:
2259 return -EIO;
2260 };
072b91f9
BK		 2261 }
2262
2263 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2264 return 0;
2265}
2266
ad8dcffa 2267/**
d2fab5cf 2268 * ibmvfc_match_key - Match function for specified cancel key
ad8dcffa 2269 * @evt: ibmvfc event struct
d2fab5cf 2270 * @key: cancel key to match
ad8dcffa
BK		 2271 *
2272 * Returns:
d2fab5cf 2273 * 1 if event matches key / 0 if event does not match key
ad8dcffa 2274 **/
d2fab5cf 2275static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
ad8dcffa 2276{
d2fab5cf 2277 unsigned long cancel_key = (unsigned long)key;
ad8dcffa 2278
d2fab5cf 2279 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
0aab6c3f 2280 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
ad8dcffa
BK		 2281 return 1;
2282 return 0;
2283}
2284
a077c7fa
BK		 2285/**
2286 * ibmvfc_match_evt - Match function for specified event
2287 * @evt: ibmvfc event struct
2288 * @match: event to match
2289 *
2290 * Returns:
2291 * 1 if event matches key / 0 if event does not match key
2292 **/
2293static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2294{
2295 if (evt == match)
2296 return 1;
2297 return 0;
2298}
2299
ad8dcffa 2300/**
d2fab5cf
BK		 2301 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2302 * @sdev: scsi device to abort commands
2303 *
2304 * This sends an Abort Task Set to the VIOS for the specified device. This does
2305 * NOT send any cancel to the VIOS. That must be done separately.
ad8dcffa
BK		 2306 *
2307 * Returns:
d2fab5cf 2308 * 0 on success / other on failure
ad8dcffa 2309 **/
d2fab5cf 2310static int ibmvfc_abort_task_set(struct scsi_device *sdev)
ad8dcffa 2311{
d2fab5cf
BK		 2312 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2313 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2314 struct ibmvfc_cmd *tmf;
2315 struct ibmvfc_event *evt, *found_evt;
2316 union ibmvfc_iu rsp_iu;
2317 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2318 int rc, rsp_rc = -EBUSY;
2319 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2320 int rsp_code = 0;
ad8dcffa 2321
d2fab5cf
BK		 2322 spin_lock_irqsave(vhost->host->host_lock, flags);
2323 found_evt = NULL;
2324 list_for_each_entry(evt, &vhost->sent, queue) {
2325 if (evt->cmnd && evt->cmnd->device == sdev) {
2326 found_evt = evt;
2327 break;
ad8dcffa 2328 }
d2fab5cf
BK		 2329 }
2330
2331 if (!found_evt) {
2332 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2333 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
ad8dcffa 2334 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2fab5cf
BK		 2335 return 0;
2336 }
ad8dcffa 2337
d2fab5cf
BK		 2338 if (vhost->state == IBMVFC_ACTIVE) {
2339 evt = ibmvfc_get_event(vhost);
2340 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
ad8dcffa 2341
d2fab5cf
BK		 2342 tmf = &evt->iu.cmd;
2343 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2344 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2345 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2346 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2347 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2348 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2349 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2350 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
d2fab5cf 2351 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 2352 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
d2fab5cf
BK		 2353 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2354 evt->sync_iu = &rsp_iu;
2355
2356 init_completion(&evt->comp);
2357 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2358 }
2359
2360 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2361
2362 if (rsp_rc != 0) {
2363 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2364 return -EIO;
2365 }
2366
2367 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2368 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2369
2370 if (!timeout) {
f8804b72 2371 rc = ibmvfc_cancel_all(sdev, 0);
d2fab5cf
BK		 2372 if (!rc) {
2373 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2374 if (rc == SUCCESS)
2375 rc = 0;
ad8dcffa 2376 }
ad8dcffa 2377
d2fab5cf
BK		 2378 if (rc) {
2379 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2380 ibmvfc_reset_host(vhost);
a077c7fa
BK		 2381 rsp_rc = -EIO;
2382 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2383
2384 if (rc == SUCCESS)
2385 rsp_rc = 0;
2386
2387 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2388 if (rc != SUCCESS) {
2389 spin_lock_irqsave(vhost->host->host_lock, flags);
2390 ibmvfc_hard_reset_host(vhost);
2391 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2392 rsp_rc = 0;
2393 }
2394
d2fab5cf
BK		 2395 goto out;
2396 }
2397 }
2398
2399 if (rsp_iu.cmd.status)
2400 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2401
2402 if (rsp_code) {
2403 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2404 rsp_code = fc_rsp->data.info.rsp_code;
2405
2406 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2407 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
0aab6c3f 2408 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
3e6f7de4 2409 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
d2fab5cf
BK		 2410 fc_rsp->scsi_status);
2411 rsp_rc = -EIO;
2412 } else
2413 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2414
2415out:
2416 spin_lock_irqsave(vhost->host->host_lock, flags);
2417 ibmvfc_free_event(evt);
2418 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2419 return rsp_rc;
ad8dcffa
BK		 2420}
2421
072b91f9
BK		 2422/**
2423 * ibmvfc_eh_abort_handler - Abort a command
2424 * @cmd: scsi command to abort
2425 *
2426 * Returns:
93631b4a 2427 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2428 **/
2429static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2430{
ad8dcffa
BK		 2431 struct scsi_device *sdev = cmd->device;
2432 struct ibmvfc_host *vhost = shost_priv(sdev->host);
55d29bf0 2433 int cancel_rc, block_rc;
ad8dcffa 2434 int rc = FAILED;
072b91f9
BK		 2435
2436 ENTER;
93631b4a 2437 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2438 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2439 if (block_rc != FAST_IO_FAIL) {
2440 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
55d29bf0 2441 ibmvfc_abort_task_set(sdev);
93631b4a 2442 } else
90f725db 2443 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2444
55d29bf0 2445 if (!cancel_rc)
ad8dcffa 2446 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2447
93631b4a
BK		 2448 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2449 rc = FAST_IO_FAIL;
2450
072b91f9 2451 LEAVE;
ad8dcffa 2452 return rc;
072b91f9
BK		 2453}
2454
2455/**
2456 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2457 * @cmd: scsi command struct
2458 *
2459 * Returns:
93631b4a 2460 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2461 **/
2462static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2463{
ad8dcffa
BK		 2464 struct scsi_device *sdev = cmd->device;
2465 struct ibmvfc_host *vhost = shost_priv(sdev->host);
93631b4a 2466 int cancel_rc, block_rc, reset_rc = 0;
ad8dcffa 2467 int rc = FAILED;
072b91f9
BK		 2468
2469 ENTER;
93631b4a 2470 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2471 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2472 if (block_rc != FAST_IO_FAIL) {
2473 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2474 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2475 } else
90f725db 2476 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2477
ad8dcffa
BK		 2478 if (!cancel_rc && !reset_rc)
2479 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2480
93631b4a
BK		 2481 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2482 rc = FAST_IO_FAIL;
2483
072b91f9 2484 LEAVE;
ad8dcffa 2485 return rc;
072b91f9
BK		 2486}
2487
93631b4a
BK		 2488/**
2489 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2490 * @sdev: scsi device struct
2491 * @data: return code
2492 *
2493 **/
2494static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2495{
2496 unsigned long *rc = data;
90f725db 2497 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
93631b4a
BK		 2498}
2499
4a5c4a5e
BK		 2500/**
2501 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2502 * @sdev: scsi device struct
2503 * @data: return code
2504 *
2505 **/
2506static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
072b91f9
BK		 2507{
2508 unsigned long *rc = data;
2509 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2510}
2511
072b91f9
BK		 2512/**
2513 * ibmvfc_eh_target_reset_handler - Reset the target
2514 * @cmd: scsi command struct
2515 *
2516 * Returns:
93631b4a 2517 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2518 **/
2519static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2520{
ad8dcffa
BK		 2521 struct scsi_device *sdev = cmd->device;
2522 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2523 struct scsi_target *starget = scsi_target(sdev);
93631b4a
BK		 2524 int block_rc;
2525 int reset_rc = 0;
ad8dcffa 2526 int rc = FAILED;
072b91f9 2527 unsigned long cancel_rc = 0;
072b91f9
BK		 2528
2529 ENTER;
93631b4a 2530 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2531 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2532 if (block_rc != FAST_IO_FAIL) {
2533 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2534 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2535 } else
2536 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
072b91f9 2537
ad8dcffa
BK		 2538 if (!cancel_rc && !reset_rc)
2539 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9 2540
93631b4a
BK		 2541 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2542 rc = FAST_IO_FAIL;
2543
072b91f9 2544 LEAVE;
ad8dcffa 2545 return rc;
072b91f9
BK		 2546}
2547
2548/**
2549 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2550 * @cmd: struct scsi_cmnd having problems
2551 *
2552 **/
2553static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2554{
8d8a3f59 2555 int rc;
072b91f9
BK		 2556 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2557
2558 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2559 rc = ibmvfc_issue_fc_host_lip(vhost->host);
93631b4a 2560
072b91f9
BK		 2561 return rc ? FAILED : SUCCESS;
2562}
2563
2564/**
2565 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2566 * @rport: rport struct
2567 *
2568 * Return value:
2569 * none
2570 **/
2571static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2572{
d2fab5cf 2573 struct Scsi_Host *shost = rport_to_shost(rport);
072b91f9 2574 struct ibmvfc_host *vhost = shost_priv(shost);
d2fab5cf
BK		 2575 struct fc_rport *dev_rport;
2576 struct scsi_device *sdev;
2577 unsigned long rc;
072b91f9
BK		 2578
2579 ENTER;
d2fab5cf
BK		 2580 shost_for_each_device(sdev, shost) {
2581 dev_rport = starget_to_rport(scsi_target(sdev));
2582 if (dev_rport != rport)
2583 continue;
90f725db 2584 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
d2fab5cf 2585 }
072b91f9 2586
d2fab5cf 2587 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
ad8dcffa
BK		 2588
2589 if (rc == FAILED)
072b91f9 2590 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2591 LEAVE;
2592}
2593
d99e5f48 2594static const struct ibmvfc_async_desc ae_desc [] = {
402c6eec
RJ		 2595 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2596 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2597 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2598 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2599 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2600 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2601 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2602 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2603 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2604 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2605 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2606 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2607 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
072b91f9
BK		 2608};
2609
d99e5f48 2610static const struct ibmvfc_async_desc unknown_ae = {
402c6eec 2611 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
d99e5f48 2612};
072b91f9
BK		 2613
2614/**
2615 * ibmvfc_get_ae_desc - Get text description for async event
2616 * @ae: async event
2617 *
2618 **/
d99e5f48 2619static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
072b91f9
BK		 2620{
2621 int i;
2622
2623 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2624 if (ae_desc[i].ae == ae)
d99e5f48
BK		 2625 return &ae_desc[i];
2626
2627 return &unknown_ae;
2628}
2629
2630static const struct {
2631 enum ibmvfc_ae_link_state state;
2632 const char *desc;
2633} link_desc [] = {
2634 { IBMVFC_AE_LS_LINK_UP, " link up" },
2635 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2636 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2637 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2638};
2639
2640/**
2641 * ibmvfc_get_link_state - Get text description for link state
2642 * @state: link state
2643 *
2644 **/
2645static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2646{
2647 int i;
2648
2649 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2650 if (link_desc[i].state == state)
2651 return link_desc[i].desc;
072b91f9 2652
d99e5f48 2653 return "";
072b91f9
BK		 2654}
2655
2656/**
2657 * ibmvfc_handle_async - Handle an async event from the adapter
2658 * @crq: crq to process
2659 * @vhost: ibmvfc host struct
2660 *
2661 **/
2662static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2663 struct ibmvfc_host *vhost)
2664{
0aab6c3f 2665 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
6d29cc56 2666 struct ibmvfc_target *tgt;
072b91f9 2667
d99e5f48 2668 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
21367e20
TD		 2669 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2670 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
d99e5f48 2671 ibmvfc_get_link_state(crq->link_state));
072b91f9 2672
0aab6c3f 2673 switch (be64_to_cpu(crq->event)) {
072b91f9 2674 case IBMVFC_AE_RESUME:
497f9c50
BK		 2675 switch (crq->link_state) {
2676 case IBMVFC_AE_LS_LINK_DOWN:
2677 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2678 break;
2679 case IBMVFC_AE_LS_LINK_DEAD:
2680 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2681 break;
2682 case IBMVFC_AE_LS_LINK_UP:
2683 case IBMVFC_AE_LS_LINK_BOUNCED:
2684 default:
2685 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2686 vhost->delay_init = 1;
2687 __ibmvfc_reset_host(vhost);
2688 break;
f36cfe6a 2689 }
497f9c50
BK		 2690
2691 break;
2692 case IBMVFC_AE_LINK_UP:
072b91f9 2693 vhost->events_to_log |= IBMVFC_AE_LINKUP;
d2131b33
BK		 2694 vhost->delay_init = 1;
2695 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2696 break;
2697 case IBMVFC_AE_SCN_FABRIC:
d2131b33 2698 case IBMVFC_AE_SCN_DOMAIN:
072b91f9 2699 vhost->events_to_log |= IBMVFC_AE_RSCN;
5cdf1626
BK		 2700 if (vhost->state < IBMVFC_HALTED) {
2701 vhost->delay_init = 1;
2702 __ibmvfc_reset_host(vhost);
2703 }
072b91f9
BK		 2704 break;
2705 case IBMVFC_AE_SCN_NPORT:
2706 case IBMVFC_AE_SCN_GROUP:
072b91f9 2707 vhost->events_to_log |= IBMVFC_AE_RSCN;
6d29cc56
BK		 2708 ibmvfc_reinit_host(vhost);
2709 break;
072b91f9
BK		 2710 case IBMVFC_AE_ELS_LOGO:
2711 case IBMVFC_AE_ELS_PRLO:
2712 case IBMVFC_AE_ELS_PLOGI:
6d29cc56
BK		 2713 list_for_each_entry(tgt, &vhost->targets, queue) {
2714 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2715 break;
0aab6c3f 2716 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
6d29cc56 2717 continue;
0aab6c3f 2718 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
6d29cc56 2719 continue;
0aab6c3f 2720 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
6d29cc56 2721 continue;
0aab6c3f 2722 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
017b2ae3 2723 tgt->logo_rcvd = 1;
0aab6c3f 2724 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
ed830385 2725 ibmvfc_del_tgt(tgt);
017b2ae3
BK		 2726 ibmvfc_reinit_host(vhost);
2727 }
6d29cc56 2728 }
072b91f9
BK		 2729 break;
2730 case IBMVFC_AE_LINK_DOWN:
2731 case IBMVFC_AE_ADAPTER_FAILED:
2732 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2733 break;
2734 case IBMVFC_AE_LINK_DEAD:
2735 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2736 break;
2737 case IBMVFC_AE_HALT:
2738 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2739 break;
2740 default:
775a42ec 2741 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
072b91f9 2742 break;
f36cfe6a 2743 }
072b91f9
BK		 2744}
2745
2746/**
2747 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2748 * @crq: Command/Response queue
2749 * @vhost: ibmvfc host struct
2750 *
2751 **/
2752static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2753{
2754 long rc;
0aab6c3f 2755 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
072b91f9
BK		 2756
2757 switch (crq->valid) {
2758 case IBMVFC_CRQ_INIT_RSP:
2759 switch (crq->format) {
2760 case IBMVFC_CRQ_INIT:
2761 dev_info(vhost->dev, "Partner initialized\n");
2762 /* Send back a response */
2763 rc = ibmvfc_send_crq_init_complete(vhost);
2764 if (rc == 0)
861890c6 2765 ibmvfc_init_host(vhost);
072b91f9
BK		 2766 else
2767 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2768 break;
2769 case IBMVFC_CRQ_INIT_COMPLETE:
2770 dev_info(vhost->dev, "Partner initialization complete\n");
861890c6 2771 ibmvfc_init_host(vhost);
072b91f9
BK		 2772 break;
2773 default:
2774 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2775 }
2776 return;
2777 case IBMVFC_CRQ_XPORT_EVENT:
2778 vhost->state = IBMVFC_NO_CRQ;
79111d08 2779 vhost->logged_in = 0;
072b91f9
BK		 2780 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2781 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2782 /* We need to re-setup the interpartition connection */
d6e2635b 2783 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n");
072b91f9
BK		 2784 vhost->client_migrated = 1;
2785 ibmvfc_purge_requests(vhost, DID_REQUEUE);
73ee5d86
BK		 2786 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2787 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
d6e2635b
TD		 2788 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) {
2789 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format);
072b91f9 2790 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 2791 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2792 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
d6e2635b
TD		 2793 } else {
2794 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format);
072b91f9
BK		 2795 }
2796 return;
2797 case IBMVFC_CRQ_CMD_RSP:
2798 break;
2799 default:
2800 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2801 return;
2802 }
2803
2804 if (crq->format == IBMVFC_ASYNC_EVENT)
2805 return;
2806
2807 /* The only kind of payload CRQs we should get are responses to
2808 * things we send. Make sure this response is to something we
2809 * actually sent
2810 */
2811 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
775a42ec 2812 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
072b91f9
BK		 2813 crq->ioba);
2814 return;
2815 }
2816
2817 if (unlikely(atomic_read(&evt->free))) {
775a42ec 2818 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
072b91f9
BK		 2819 crq->ioba);
2820 return;
2821 }
2822
2823 del_timer(&evt->timer);
2824 list_del(&evt->queue);
2825 ibmvfc_trc_end(evt);
2826 evt->done(evt);
2827}
2828
2829/**
2830 * ibmvfc_scan_finished - Check if the device scan is done.
2831 * @shost: scsi host struct
2832 * @time: current elapsed time
2833 *
2834 * Returns:
2835 * 0 if scan is not done / 1 if scan is done
2836 **/
2837static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2838{
2839 unsigned long flags;
2840 struct ibmvfc_host *vhost = shost_priv(shost);
2841 int done = 0;
2842
2843 spin_lock_irqsave(shost->host_lock, flags);
2844 if (time >= (init_timeout * HZ)) {
2845 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2846 "continuing initialization\n", init_timeout);
2847 done = 1;
2848 }
2849
43c8da90 2850 if (vhost->scan_complete)
072b91f9
BK		 2851 done = 1;
2852 spin_unlock_irqrestore(shost->host_lock, flags);
2853 return done;
2854}
2855
2856/**
2857 * ibmvfc_slave_alloc - Setup the device's task set value
2858 * @sdev: struct scsi_device device to configure
2859 *
2860 * Set the device's task set value so that error handling works as
2861 * expected.
2862 *
2863 * Returns:
2864 * 0 on success / -ENXIO if device does not exist
2865 **/
2866static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2867{
2868 struct Scsi_Host *shost = sdev->host;
2869 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2870 struct ibmvfc_host *vhost = shost_priv(shost);
2871 unsigned long flags = 0;
2872
2873 if (!rport || fc_remote_port_chkready(rport))
2874 return -ENXIO;
2875
2876 spin_lock_irqsave(shost->host_lock, flags);
2877 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2878 spin_unlock_irqrestore(shost->host_lock, flags);
2879 return 0;
2880}
2881
ad8dcffa
BK		 2882/**
2883 * ibmvfc_target_alloc - Setup the target's task set value
2884 * @starget: struct scsi_target
2885 *
2886 * Set the target's task set value so that error handling works as
2887 * expected.
2888 *
2889 * Returns:
2890 * 0 on success / -ENXIO if device does not exist
2891 **/
2892static int ibmvfc_target_alloc(struct scsi_target *starget)
2893{
2894 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2895 struct ibmvfc_host *vhost = shost_priv(shost);
2896 unsigned long flags = 0;
2897
2898 spin_lock_irqsave(shost->host_lock, flags);
2899 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2900 spin_unlock_irqrestore(shost->host_lock, flags);
2901 return 0;
2902}
2903
072b91f9
BK		 2904/**
2905 * ibmvfc_slave_configure - Configure the device
2906 * @sdev: struct scsi_device device to configure
2907 *
2908 * Enable allow_restart for a device if it is a disk. Adjust the
2909 * queue_depth here also.
2910 *
2911 * Returns:
2912 * 0
2913 **/
2914static int ibmvfc_slave_configure(struct scsi_device *sdev)
2915{
2916 struct Scsi_Host *shost = sdev->host;
072b91f9
BK		 2917 unsigned long flags = 0;
2918
2919 spin_lock_irqsave(shost->host_lock, flags);
2920 if (sdev->type == TYPE_DISK)
2921 sdev->allow_restart = 1;
072b91f9
BK		 2922 spin_unlock_irqrestore(shost->host_lock, flags);
2923 return 0;
2924}
2925
2926/**
2927 * ibmvfc_change_queue_depth - Change the device's queue depth
2928 * @sdev: scsi device struct
2929 * @qdepth: depth to set
e881a172 2930 * @reason: calling context
072b91f9
BK		 2931 *
2932 * Return value:
2933 * actual depth set
2934 **/
db5ed4df 2935static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
072b91f9
BK		 2936{
2937 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2938 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2939
db5ed4df 2940 return scsi_change_queue_depth(sdev, qdepth);
072b91f9
BK		 2941}
2942
072b91f9
BK		 2943static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2944 struct device_attribute *attr, char *buf)
2945{
2946 struct Scsi_Host *shost = class_to_shost(dev);
2947 struct ibmvfc_host *vhost = shost_priv(shost);
2948
2949 return snprintf(buf, PAGE_SIZE, "%s\n",
2950 vhost->login_buf->resp.partition_name);
2951}
2952
072b91f9
BK		 2953static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2954 struct device_attribute *attr, char *buf)
2955{
2956 struct Scsi_Host *shost = class_to_shost(dev);
2957 struct ibmvfc_host *vhost = shost_priv(shost);
2958
2959 return snprintf(buf, PAGE_SIZE, "%s\n",
2960 vhost->login_buf->resp.device_name);
2961}
2962
072b91f9
BK		 2963static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2964 struct device_attribute *attr, char *buf)
2965{
2966 struct Scsi_Host *shost = class_to_shost(dev);
2967 struct ibmvfc_host *vhost = shost_priv(shost);
2968
2969 return snprintf(buf, PAGE_SIZE, "%s\n",
2970 vhost->login_buf->resp.port_loc_code);
2971}
2972
072b91f9
BK		 2973static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2974 struct device_attribute *attr, char *buf)
2975{
2976 struct Scsi_Host *shost = class_to_shost(dev);
2977 struct ibmvfc_host *vhost = shost_priv(shost);
2978
2979 return snprintf(buf, PAGE_SIZE, "%s\n",
2980 vhost->login_buf->resp.drc_name);
2981}
2982
072b91f9
BK		 2983static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2984 struct device_attribute *attr, char *buf)
2985{
2986 struct Scsi_Host *shost = class_to_shost(dev);
2987 struct ibmvfc_host *vhost = shost_priv(shost);
2988 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2989}
2990
497f9c50
BK		 2991static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2992 struct device_attribute *attr, char *buf)
2993{
2994 struct Scsi_Host *shost = class_to_shost(dev);
2995 struct ibmvfc_host *vhost = shost_priv(shost);
2996 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2997}
2998
072b91f9
BK		 2999/**
3000 * ibmvfc_show_log_level - Show the adapter's error logging level
3001 * @dev: class device struct
3002 * @buf: buffer
3003 *
3004 * Return value:
3005 * number of bytes printed to buffer
3006 **/
3007static ssize_t ibmvfc_show_log_level(struct device *dev,
3008 struct device_attribute *attr, char *buf)
3009{
3010 struct Scsi_Host *shost = class_to_shost(dev);
3011 struct ibmvfc_host *vhost = shost_priv(shost);
3012 unsigned long flags = 0;
3013 int len;
3014
3015 spin_lock_irqsave(shost->host_lock, flags);
3016 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
3017 spin_unlock_irqrestore(shost->host_lock, flags);
3018 return len;
3019}
3020
3021/**
3022 * ibmvfc_store_log_level - Change the adapter's error logging level
3023 * @dev: class device struct
3024 * @buf: buffer
3025 *
3026 * Return value:
3027 * number of bytes printed to buffer
3028 **/
3029static ssize_t ibmvfc_store_log_level(struct device *dev,
3030 struct device_attribute *attr,
3031 const char *buf, size_t count)
3032{
3033 struct Scsi_Host *shost = class_to_shost(dev);
3034 struct ibmvfc_host *vhost = shost_priv(shost);
3035 unsigned long flags = 0;
3036
3037 spin_lock_irqsave(shost->host_lock, flags);
3038 vhost->log_level = simple_strtoul(buf, NULL, 10);
3039 spin_unlock_irqrestore(shost->host_lock, flags);
3040 return strlen(buf);
3041}
3042
85e2399e
BK		 3043static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3044static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3045static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3046static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3047static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
497f9c50 3048static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
85e2399e
BK		 3049static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3050 ibmvfc_show_log_level, ibmvfc_store_log_level);
072b91f9
BK		 3051
3052#ifdef CONFIG_SCSI_IBMVFC_TRACE
3053/**
3054 * ibmvfc_read_trace - Dump the adapter trace
2c3c8bea 3055 * @filp: open sysfs file
072b91f9
BK		 3056 * @kobj: kobject struct
3057 * @bin_attr: bin_attribute struct
3058 * @buf: buffer
3059 * @off: offset
3060 * @count: buffer size
3061 *
3062 * Return value:
3063 * number of bytes printed to buffer
3064 **/
2c3c8bea 3065static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
072b91f9
BK		 3066 struct bin_attribute *bin_attr,
3067 char *buf, loff_t off, size_t count)
3068{
3069 struct device *dev = container_of(kobj, struct device, kobj);
3070 struct Scsi_Host *shost = class_to_shost(dev);
3071 struct ibmvfc_host *vhost = shost_priv(shost);
3072 unsigned long flags = 0;
3073 int size = IBMVFC_TRACE_SIZE;
3074 char *src = (char *)vhost->trace;
3075
3076 if (off > size)
3077 return 0;
3078 if (off + count > size) {
3079 size -= off;
3080 count = size;
3081 }
3082
3083 spin_lock_irqsave(shost->host_lock, flags);
3084 memcpy(buf, &src[off], count);
3085 spin_unlock_irqrestore(shost->host_lock, flags);
3086 return count;
3087}
3088
3089static struct bin_attribute ibmvfc_trace_attr = {
3090 .attr = {
3091 .name = "trace",
3092 .mode = S_IRUGO,
3093 },
3094 .size = 0,
3095 .read = ibmvfc_read_trace,
3096};
3097#endif
3098
3099static struct device_attribute *ibmvfc_attrs[] = {
85e2399e
BK		 3100 &dev_attr_partition_name,
3101 &dev_attr_device_name,
3102 &dev_attr_port_loc_code,
3103 &dev_attr_drc_name,
3104 &dev_attr_npiv_version,
497f9c50 3105 &dev_attr_capabilities,
85e2399e 3106 &dev_attr_log_level,
072b91f9
BK		 3107 NULL
3108};
3109
3110static struct scsi_host_template driver_template = {
3111 .module = THIS_MODULE,
3112 .name = "IBM POWER Virtual FC Adapter",
3113 .proc_name = IBMVFC_NAME,
3114 .queuecommand = ibmvfc_queuecommand,
b6a05c82 3115 .eh_timed_out = fc_eh_timed_out,
072b91f9
BK		 3116 .eh_abort_handler = ibmvfc_eh_abort_handler,
3117 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3118 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3119 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3120 .slave_alloc = ibmvfc_slave_alloc,
3121 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 3122 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 3123 .scan_finished = ibmvfc_scan_finished,
3124 .change_queue_depth = ibmvfc_change_queue_depth,
072b91f9
BK		 3125 .cmd_per_lun = 16,
3126 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3127 .this_id = -1,
3128 .sg_tablesize = SG_ALL,
3129 .max_sectors = IBMVFC_MAX_SECTORS,
072b91f9 3130 .shost_attrs = ibmvfc_attrs,
c40ecc12 3131 .track_queue_depth = 1,
072b91f9
BK		 3132};
3133
3134/**
3135 * ibmvfc_next_async_crq - Returns the next entry in async queue
3136 * @vhost: ibmvfc host struct
3137 *
3138 * Returns:
3139 * Pointer to next entry in queue / NULL if empty
3140 **/
3141static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3142{
3143 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3144 struct ibmvfc_async_crq *crq;
3145
3146 crq = &async_crq->msgs[async_crq->cur];
3147 if (crq->valid & 0x80) {
3148 if (++async_crq->cur == async_crq->size)
3149 async_crq->cur = 0;
f5832fa2 3150 rmb();
072b91f9
BK		 3151 } else
3152 crq = NULL;
3153
3154 return crq;
3155}
3156
3157/**
3158 * ibmvfc_next_crq - Returns the next entry in message queue
3159 * @vhost: ibmvfc host struct
3160 *
3161 * Returns:
3162 * Pointer to next entry in queue / NULL if empty
3163 **/
3164static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3165{
3166 struct ibmvfc_crq_queue *queue = &vhost->crq;
3167 struct ibmvfc_crq *crq;
3168
3169 crq = &queue->msgs[queue->cur];
3170 if (crq->valid & 0x80) {
3171 if (++queue->cur == queue->size)
3172 queue->cur = 0;
f5832fa2 3173 rmb();
072b91f9
BK		 3174 } else
3175 crq = NULL;
3176
3177 return crq;
3178}
3179
3180/**
3181 * ibmvfc_interrupt - Interrupt handler
3182 * @irq: number of irq to handle, not used
3183 * @dev_instance: ibmvfc_host that received interrupt
3184 *
3185 * Returns:
3186 * IRQ_HANDLED
3187 **/
3188static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3189{
3190 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
039a0898
BK		 3191 unsigned long flags;
3192
3193 spin_lock_irqsave(vhost->host->host_lock, flags);
3194 vio_disable_interrupts(to_vio_dev(vhost->dev));
3195 tasklet_schedule(&vhost->tasklet);
3196 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3197 return IRQ_HANDLED;
3198}
3199
3200/**
3201 * ibmvfc_tasklet - Interrupt handler tasklet
3202 * @data: ibmvfc host struct
3203 *
3204 * Returns:
3205 * Nothing
3206 **/
3207static void ibmvfc_tasklet(void *data)
3208{
3209 struct ibmvfc_host *vhost = data;
072b91f9
BK		 3210 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3211 struct ibmvfc_crq *crq;
3212 struct ibmvfc_async_crq *async;
3213 unsigned long flags;
3214 int done = 0;
3215
3216 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 3217 while (!done) {
072b91f9
BK		 3218 /* Pull all the valid messages off the async CRQ */
3219 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3220 ibmvfc_handle_async(async, vhost);
3221 async->valid = 0;
f5832fa2 3222 wmb();
072b91f9
BK		 3223 }
3224
f1d7fb7a
BK		 3225 /* Pull all the valid messages off the CRQ */
3226 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
072b91f9
BK		 3227 ibmvfc_handle_crq(crq, vhost);
3228 crq->valid = 0;
f5832fa2 3229 wmb();
f1d7fb7a
BK		 3230 }
3231
3232 vio_enable_interrupts(vdev);
3233 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
072b91f9
BK		 3234 vio_disable_interrupts(vdev);
3235 ibmvfc_handle_async(async, vhost);
4081b77c 3236 async->valid = 0;
f5832fa2 3237 wmb();
f1d7fb7a
BK		 3238 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3239 vio_disable_interrupts(vdev);
3240 ibmvfc_handle_crq(crq, vhost);
3241 crq->valid = 0;
f5832fa2 3242 wmb();
072b91f9
BK		 3243 } else
3244 done = 1;
3245 }
3246
3247 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 3248}
3249
3250/**
3251 * ibmvfc_init_tgt - Set the next init job step for the target
3252 * @tgt: ibmvfc target struct
3253 * @job_step: job step to perform
3254 *
3255 **/
3256static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3257 void (*job_step) (struct ibmvfc_target *))
3258{
ed830385
BK		 3259 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT))
3260 tgt->job_step = job_step;
072b91f9
BK		 3261 wake_up(&tgt->vhost->work_wait_q);
3262}
3263
3264/**
3265 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3266 * @tgt: ibmvfc target struct
3267 * @job_step: initialization job step
3268 *
7d0e4622
BK		 3269 * Returns: 1 if step will be retried / 0 if not
3270 *
072b91f9 3271 **/
7d0e4622 3272static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
072b91f9
BK		 3273 void (*job_step) (struct ibmvfc_target *))
3274{
1c41fa82 3275 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
ed830385 3276 ibmvfc_del_tgt(tgt);
072b91f9 3277 wake_up(&tgt->vhost->work_wait_q);
7d0e4622 3278 return 0;
072b91f9
BK		 3279 } else
3280 ibmvfc_init_tgt(tgt, job_step);
7d0e4622 3281 return 1;
072b91f9
BK		 3282}
3283
a3b7aeab
BK		 3284/* Defined in FC-LS */
3285static const struct {
3286 int code;
3287 int retry;
3288 int logged_in;
3289} prli_rsp [] = {
3290 { 0, 1, 0 },
3291 { 1, 0, 1 },
3292 { 2, 1, 0 },
3293 { 3, 1, 0 },
3294 { 4, 0, 0 },
3295 { 5, 0, 0 },
3296 { 6, 0, 1 },
3297 { 7, 0, 0 },
3298 { 8, 1, 0 },
3299};
3300
3301/**
3302 * ibmvfc_get_prli_rsp - Find PRLI response index
3303 * @flags: PRLI response flags
3304 *
3305 **/
3306static int ibmvfc_get_prli_rsp(u16 flags)
3307{
3308 int i;
3309 int code = (flags & 0x0f00) >> 8;
3310
3311 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3312 if (prli_rsp[i].code == code)
3313 return i;
3314
3315 return 0;
3316}
3317
072b91f9
BK		 3318/**
3319 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3320 * @evt: ibmvfc event struct
3321 *
3322 **/
3323static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3324{
3325 struct ibmvfc_target *tgt = evt->tgt;
3326 struct ibmvfc_host *vhost = evt->vhost;
3327 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
a3b7aeab 3328 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
0aab6c3f 3329 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3330 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3331
3332 vhost->discovery_threads--;
3333 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3334 switch (status) {
3335 case IBMVFC_MAD_SUCCESS:
a3b7aeab
BK		 3336 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3337 parms->type, parms->flags, parms->service_parms);
3338
3339 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
0aab6c3f 3340 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
a3b7aeab 3341 if (prli_rsp[index].logged_in) {
0aab6c3f 3342 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
a3b7aeab
BK		 3343 tgt->need_login = 0;
3344 tgt->ids.roles = 0;
0aab6c3f 3345 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
a3b7aeab 3346 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
0aab6c3f 3347 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
a3b7aeab 3348 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
43c8da90 3349 tgt->add_rport = 1;
a3b7aeab 3350 } else
ed830385 3351 ibmvfc_del_tgt(tgt);
a3b7aeab
BK		 3352 } else if (prli_rsp[index].retry)
3353 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3354 else
ed830385 3355 ibmvfc_del_tgt(tgt);
a3b7aeab 3356 } else
ed830385 3357 ibmvfc_del_tgt(tgt);
072b91f9
BK		 3358 break;
3359 case IBMVFC_MAD_DRIVER_FAILED:
3360 break;
3361 case IBMVFC_MAD_CRQ_ERROR:
3362 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3363 break;
3364 case IBMVFC_MAD_FAILED:
3365 default:
0aab6c3f
TD		 3366 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3367 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
017b2ae3
BK		 3368 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3369 else if (tgt->logo_rcvd)
3370 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
0aab6c3f 3371 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3372 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499 3373 else
ed830385 3374 ibmvfc_del_tgt(tgt);
7d0e4622
BK		 3375
3376 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
0aab6c3f 3377 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4 3378 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status);
072b91f9 3379 break;
f36cfe6a 3380 }
072b91f9
BK		 3381
3382 kref_put(&tgt->kref, ibmvfc_release_tgt);
3383 ibmvfc_free_event(evt);
3384 wake_up(&vhost->work_wait_q);
3385}
3386
3387/**
3388 * ibmvfc_tgt_send_prli - Send a process login
3389 * @tgt: ibmvfc target struct
3390 *
3391 **/
3392static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3393{
3394 struct ibmvfc_process_login *prli;
3395 struct ibmvfc_host *vhost = tgt->vhost;
3396 struct ibmvfc_event *evt;
3397
3398 if (vhost->discovery_threads >= disc_threads)
3399 return;
3400
3401 kref_get(&tgt->kref);
3402 evt = ibmvfc_get_event(vhost);
3403 vhost->discovery_threads++;
3404 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3405 evt->tgt = tgt;
3406 prli = &evt->iu.prli;
3407 memset(prli, 0, sizeof(*prli));
0aab6c3f
TD		 3408 prli->common.version = cpu_to_be32(1);
3409 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3410 prli->common.length = cpu_to_be16(sizeof(*prli));
3411 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3412
3413 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
0aab6c3f
TD		 3414 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3415 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
bb5a5054 3416 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
072b91f9 3417
a6104b1e
TD		 3418 if (cls3_error)
3419 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3420
072b91f9
BK		 3421 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3422 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3423 vhost->discovery_threads--;
3424 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3425 kref_put(&tgt->kref, ibmvfc_release_tgt);
3426 } else
3427 tgt_dbg(tgt, "Sent process login\n");
3428}
3429
3430/**
3431 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3432 * @evt: ibmvfc event struct
3433 *
3434 **/
3435static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3436{
3437 struct ibmvfc_target *tgt = evt->tgt;
3438 struct ibmvfc_host *vhost = evt->vhost;
3439 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
0aab6c3f 3440 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3441 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3442
3443 vhost->discovery_threads--;
3444 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3445 switch (status) {
3446 case IBMVFC_MAD_SUCCESS:
3447 tgt_dbg(tgt, "Port Login succeeded\n");
3448 if (tgt->ids.port_name &&
3449 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3450 vhost->reinit = 1;
3451 tgt_dbg(tgt, "Port re-init required\n");
3452 break;
3453 }
3454 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3455 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3456 tgt->ids.port_id = tgt->scsi_id;
072b91f9
BK		 3457 memcpy(&tgt->service_parms, &rsp->service_parms,
3458 sizeof(tgt->service_parms));
3459 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3460 sizeof(tgt->service_parms_change));
3461 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3462 break;
3463 case IBMVFC_MAD_DRIVER_FAILED:
3464 break;
3465 case IBMVFC_MAD_CRQ_ERROR:
3466 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3467 break;
3468 case IBMVFC_MAD_FAILED:
3469 default:
0aab6c3f 3470 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3471 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499 3472 else
ed830385 3473 ibmvfc_del_tgt(tgt);
7d0e4622
BK		 3474
3475 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3e6f7de4
TD		 3476 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3477 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
3478 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
3479 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status);
072b91f9 3480 break;
f36cfe6a 3481 }
072b91f9
BK		 3482
3483 kref_put(&tgt->kref, ibmvfc_release_tgt);
3484 ibmvfc_free_event(evt);
3485 wake_up(&vhost->work_wait_q);
3486}
3487
3488/**
3489 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3490 * @tgt: ibmvfc target struct
3491 *
3492 **/
3493static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3494{
3495 struct ibmvfc_port_login *plogi;
3496 struct ibmvfc_host *vhost = tgt->vhost;
3497 struct ibmvfc_event *evt;
3498
3499 if (vhost->discovery_threads >= disc_threads)
3500 return;
3501
3502 kref_get(&tgt->kref);
017b2ae3 3503 tgt->logo_rcvd = 0;
072b91f9
BK		 3504 evt = ibmvfc_get_event(vhost);
3505 vhost->discovery_threads++;
3506 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3507 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3508 evt->tgt = tgt;
3509 plogi = &evt->iu.plogi;
3510 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 3511 plogi->common.version = cpu_to_be32(1);
3512 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3513 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3514 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3515
3516 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3517 vhost->discovery_threads--;
3518 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3519 kref_put(&tgt->kref, ibmvfc_release_tgt);
3520 } else
3521 tgt_dbg(tgt, "Sent port login\n");
3522}
3523
3524/**
3525 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3526 * @evt: ibmvfc event struct
3527 *
3528 **/
3529static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3530{
3531 struct ibmvfc_target *tgt = evt->tgt;
3532 struct ibmvfc_host *vhost = evt->vhost;
3533 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
0aab6c3f 3534 u32 status = be16_to_cpu(rsp->common.status);
072b91f9
BK		 3535
3536 vhost->discovery_threads--;
3537 ibmvfc_free_event(evt);
3538 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3539
3540 switch (status) {
3541 case IBMVFC_MAD_SUCCESS:
3542 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3543 break;
3544 case IBMVFC_MAD_DRIVER_FAILED:
3545 kref_put(&tgt->kref, ibmvfc_release_tgt);
3546 wake_up(&vhost->work_wait_q);
3547 return;
3548 case IBMVFC_MAD_FAILED:
3549 default:
3550 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3551 break;
f36cfe6a 3552 }
072b91f9 3553
ed830385 3554 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
072b91f9
BK		 3555 kref_put(&tgt->kref, ibmvfc_release_tgt);
3556 wake_up(&vhost->work_wait_q);
3557}
3558
3559/**
ed830385 3560 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout
072b91f9
BK		 3561 * @tgt: ibmvfc target struct
3562 *
ed830385
BK		 3563 * Returns:
3564 * Allocated and initialized ibmvfc_event struct
072b91f9 3565 **/
ed830385
BK		 3566static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt,
3567 void (*done) (struct ibmvfc_event *))
072b91f9
BK		 3568{
3569 struct ibmvfc_implicit_logout *mad;
3570 struct ibmvfc_host *vhost = tgt->vhost;
3571 struct ibmvfc_event *evt;
3572
072b91f9
BK		 3573 kref_get(&tgt->kref);
3574 evt = ibmvfc_get_event(vhost);
ed830385 3575 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT);
072b91f9
BK		 3576 evt->tgt = tgt;
3577 mad = &evt->iu.implicit_logout;
3578 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3579 mad->common.version = cpu_to_be32(1);
3580 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3581 mad->common.length = cpu_to_be16(sizeof(*mad));
3582 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
ed830385
BK		 3583 return evt;
3584}
3585
3586/**
3587 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3588 * @tgt: ibmvfc target struct
3589 *
3590 **/
3591static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3592{
3593 struct ibmvfc_host *vhost = tgt->vhost;
3594 struct ibmvfc_event *evt;
3595
3596 if (vhost->discovery_threads >= disc_threads)
3597 return;
3598
3599 vhost->discovery_threads++;
3600 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt,
3601 ibmvfc_tgt_implicit_logout_done);
072b91f9
BK		 3602
3603 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3604 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3605 vhost->discovery_threads--;
3606 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3607 kref_put(&tgt->kref, ibmvfc_release_tgt);
3608 } else
3609 tgt_dbg(tgt, "Sent Implicit Logout\n");
3610}
3611
ed830385
BK		 3612/**
3613 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD
3614 * @evt: ibmvfc event struct
3615 *
3616 **/
3617static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt)
3618{
3619 struct ibmvfc_target *tgt = evt->tgt;
3620 struct ibmvfc_host *vhost = evt->vhost;
3621 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3622 u32 status = be16_to_cpu(mad->common.status);
3623
3624 vhost->discovery_threads--;
3625 ibmvfc_free_event(evt);
3626 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3627
3628 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed");
3629 kref_put(&tgt->kref, ibmvfc_release_tgt);
3630 wake_up(&vhost->work_wait_q);
3631}
3632
3633/**
3634 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target
3635 * @tgt: ibmvfc target struct
3636 *
3637 **/
3638static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt)
3639{
3640 struct ibmvfc_host *vhost = tgt->vhost;
3641 struct ibmvfc_event *evt;
3642
66bb7fa8
BK		 3643 if (!vhost->logged_in) {
3644 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3645 return;
3646 }
3647
ed830385 3648 if (vhost->discovery_threads >= disc_threads)
b893eb01 3649 return;
ed830385
BK		 3650
3651 vhost->discovery_threads++;
3652 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt,
3653 ibmvfc_tgt_implicit_logout_and_del_done);
3654
3655 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT);
3656 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3657 vhost->discovery_threads--;
3658 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3659 kref_put(&tgt->kref, ibmvfc_release_tgt);
3660 } else
3661 tgt_dbg(tgt, "Sent Implicit Logout\n");
3662}
3663
989b8545
BK		 3664/**
3665 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3666 * @mad: ibmvfc passthru mad struct
3667 * @tgt: ibmvfc target struct
3668 *
3669 * Returns:
3670 * 1 if PLOGI needed / 0 if PLOGI not needed
3671 **/
3672static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3673 struct ibmvfc_target *tgt)
3674{
09dd15e0 3675 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
989b8545 3676 return 1;
09dd15e0 3677 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
989b8545 3678 return 1;
0aab6c3f 3679 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
989b8545
BK		 3680 return 1;
3681 return 0;
3682}
3683
3684/**
3685 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3686 * @evt: ibmvfc event struct
3687 *
3688 **/
3689static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3690{
3691 struct ibmvfc_target *tgt = evt->tgt;
3692 struct ibmvfc_host *vhost = evt->vhost;
3693 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
0aab6c3f 3694 u32 status = be16_to_cpu(mad->common.status);
989b8545
BK		 3695 u8 fc_reason, fc_explain;
3696
3697 vhost->discovery_threads--;
3698 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
10501e1c 3699 del_timer(&tgt->timer);
989b8545
BK		 3700
3701 switch (status) {
3702 case IBMVFC_MAD_SUCCESS:
3703 tgt_dbg(tgt, "ADISC succeeded\n");
3704 if (ibmvfc_adisc_needs_plogi(mad, tgt))
ed830385 3705 ibmvfc_del_tgt(tgt);
989b8545
BK		 3706 break;
3707 case IBMVFC_MAD_DRIVER_FAILED:
3708 break;
3709 case IBMVFC_MAD_FAILED:
3710 default:
ed830385 3711 ibmvfc_del_tgt(tgt);
0aab6c3f
TD		 3712 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3713 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
989b8545 3714 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f 3715 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
3e6f7de4 3716 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error),
989b8545
BK		 3717 ibmvfc_get_fc_type(fc_reason), fc_reason,
3718 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3719 break;
f36cfe6a 3720 }
989b8545
BK		 3721
3722 kref_put(&tgt->kref, ibmvfc_release_tgt);
3723 ibmvfc_free_event(evt);
3724 wake_up(&vhost->work_wait_q);
3725}
3726
3727/**
3728 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3729 * @evt: ibmvfc event struct
3730 *
3731 **/
3732static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3733{
3734 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3735
3736 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3737 mad->common.version = cpu_to_be32(1);
3738 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3739 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3740 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3741 offsetof(struct ibmvfc_passthru_mad, iu));
3742 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3743 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3744 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3745 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3746 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3747 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3748 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3749 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3750 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3751 offsetof(struct ibmvfc_passthru_fc_iu, response));
3752 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
989b8545
BK		 3753}
3754
10501e1c
BK		 3755/**
3756 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3757 * @evt: ibmvfc event struct
3758 *
3759 * Just cleanup this event struct. Everything else is handled by
3760 * the ADISC completion handler. If the ADISC never actually comes
3761 * back, we still have the timer running on the ADISC event struct
3762 * which will fire and cause the CRQ to get reset.
3763 *
3764 **/
3765static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3766{
3767 struct ibmvfc_host *vhost = evt->vhost;
3768 struct ibmvfc_target *tgt = evt->tgt;
3769
3770 tgt_dbg(tgt, "ADISC cancel complete\n");
3771 vhost->abort_threads--;
3772 ibmvfc_free_event(evt);
3773 kref_put(&tgt->kref, ibmvfc_release_tgt);
3774 wake_up(&vhost->work_wait_q);
3775}
3776
3777/**
3778 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3779 * @tgt: ibmvfc target struct
3780 *
3781 * If an ADISC times out, send a cancel. If the cancel times
3782 * out, reset the CRQ. When the ADISC comes back as cancelled,
3783 * log back into the target.
3784 **/
9a5d04fc 3785static void ibmvfc_adisc_timeout(struct timer_list *t)
10501e1c 3786{
9a5d04fc 3787 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
10501e1c
BK		 3788 struct ibmvfc_host *vhost = tgt->vhost;
3789 struct ibmvfc_event *evt;
3790 struct ibmvfc_tmf *tmf;
3791 unsigned long flags;
3792 int rc;
3793
3794 tgt_dbg(tgt, "ADISC timeout\n");
3795 spin_lock_irqsave(vhost->host->host_lock, flags);
3796 if (vhost->abort_threads >= disc_threads ||
3797 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3798 vhost->state != IBMVFC_INITIALIZING ||
3799 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3800 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3801 return;
3802 }
3803
3804 vhost->abort_threads++;
3805 kref_get(&tgt->kref);
3806 evt = ibmvfc_get_event(vhost);
3807 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3808
3809 evt->tgt = tgt;
3810 tmf = &evt->iu.tmf;
3811 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 3812 tmf->common.version = cpu_to_be32(1);
3813 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3814 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3815 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3816 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
10501e1c
BK		 3817
3818 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3819
3820 if (rc) {
3821 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3822 vhost->abort_threads--;
3823 kref_put(&tgt->kref, ibmvfc_release_tgt);
3824 __ibmvfc_reset_host(vhost);
3825 } else
3826 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3827 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3828}
3829
989b8545
BK		 3830/**
3831 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3832 * @tgt: ibmvfc target struct
3833 *
10501e1c
BK		 3834 * When sending an ADISC we end up with two timers running. The
3835 * first timer is the timer in the ibmvfc target struct. If this
3836 * fires, we send a cancel to the target. The second timer is the
3837 * timer on the ibmvfc event for the ADISC, which is longer. If that
3838 * fires, it means the ADISC timed out and our attempt to cancel it
3839 * also failed, so we need to reset the CRQ.
989b8545
BK		 3840 **/
3841static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3842{
3843 struct ibmvfc_passthru_mad *mad;
3844 struct ibmvfc_host *vhost = tgt->vhost;
3845 struct ibmvfc_event *evt;
3846
3847 if (vhost->discovery_threads >= disc_threads)
3848 return;
3849
3850 kref_get(&tgt->kref);
3851 evt = ibmvfc_get_event(vhost);
3852 vhost->discovery_threads++;
3853 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3854 evt->tgt = tgt;
3855
3856 ibmvfc_init_passthru(evt);
3857 mad = &evt->iu.passthru;
0aab6c3f
TD		 3858 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3859 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3860 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
989b8545 3861
0aab6c3f 3862 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
989b8545
BK		 3863 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3864 sizeof(vhost->login_buf->resp.port_name));
3865 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3866 sizeof(vhost->login_buf->resp.node_name));
0aab6c3f 3867 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
989b8545 3868
10501e1c
BK		 3869 if (timer_pending(&tgt->timer))
3870 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3871 else {
10501e1c 3872 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
10501e1c
BK		 3873 add_timer(&tgt->timer);
3874 }
3875
989b8545 3876 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
10501e1c 3877 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
989b8545 3878 vhost->discovery_threads--;
10501e1c 3879 del_timer(&tgt->timer);
989b8545
BK		 3880 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3881 kref_put(&tgt->kref, ibmvfc_release_tgt);
3882 } else
3883 tgt_dbg(tgt, "Sent ADISC\n");
3884}
3885
072b91f9
BK		 3886/**
3887 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3888 * @evt: ibmvfc event struct
3889 *
3890 **/
3891static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3892{
3893 struct ibmvfc_target *tgt = evt->tgt;
3894 struct ibmvfc_host *vhost = evt->vhost;
3895 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
0aab6c3f 3896 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3897 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3898
3899 vhost->discovery_threads--;
3900 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3901 switch (status) {
3902 case IBMVFC_MAD_SUCCESS:
3903 tgt_dbg(tgt, "Query Target succeeded\n");
0aab6c3f 3904 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
ed830385 3905 ibmvfc_del_tgt(tgt);
989b8545
BK		 3906 else
3907 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3908 break;
3909 case IBMVFC_MAD_DRIVER_FAILED:
3910 break;
3911 case IBMVFC_MAD_CRQ_ERROR:
3912 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3913 break;
3914 case IBMVFC_MAD_FAILED:
3915 default:
0aab6c3f
TD		 3916 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3917 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3918 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
ed830385 3919 ibmvfc_del_tgt(tgt);
0aab6c3f 3920 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3921 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499 3922 else
ed830385 3923 ibmvfc_del_tgt(tgt);
7d0e4622
BK		 3924
3925 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f 3926 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4
TD		 3927 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
3928 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
3929 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain),
3930 status);
072b91f9 3931 break;
f36cfe6a 3932 }
072b91f9
BK		 3933
3934 kref_put(&tgt->kref, ibmvfc_release_tgt);
3935 ibmvfc_free_event(evt);
3936 wake_up(&vhost->work_wait_q);
3937}
3938
3939/**
3940 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3941 * @tgt: ibmvfc target struct
3942 *
3943 **/
3944static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3945{
3946 struct ibmvfc_query_tgt *query_tgt;
3947 struct ibmvfc_host *vhost = tgt->vhost;
3948 struct ibmvfc_event *evt;
3949
3950 if (vhost->discovery_threads >= disc_threads)
3951 return;
3952
3953 kref_get(&tgt->kref);
3954 evt = ibmvfc_get_event(vhost);
3955 vhost->discovery_threads++;
3956 evt->tgt = tgt;
3957 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3958 query_tgt = &evt->iu.query_tgt;
3959 memset(query_tgt, 0, sizeof(*query_tgt));
0aab6c3f
TD		 3960 query_tgt->common.version = cpu_to_be32(1);
3961 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3962 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3963 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
072b91f9
BK		 3964
3965 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3966 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3967 vhost->discovery_threads--;
3968 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3969 kref_put(&tgt->kref, ibmvfc_release_tgt);
3970 } else
3971 tgt_dbg(tgt, "Sent Query Target\n");
3972}
3973
3974/**
3975 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3976 * @vhost: ibmvfc host struct
3977 * @scsi_id: SCSI ID to allocate target for
3978 *
3979 * Returns:
3980 * 0 on success / other on failure
3981 **/
3982static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3983{
3984 struct ibmvfc_target *tgt;
3985 unsigned long flags;
3986
3987 spin_lock_irqsave(vhost->host->host_lock, flags);
3988 list_for_each_entry(tgt, &vhost->targets, queue) {
3989 if (tgt->scsi_id == scsi_id) {
3990 if (tgt->need_login)
3991 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3992 goto unlock_out;
3993 }
3994 }
3995 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3996
7270b9bd 3997 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
0883e3b3 3998 memset(tgt, 0, sizeof(*tgt));
072b91f9 3999 tgt->scsi_id = scsi_id;
072b91f9
BK		 4000 tgt->vhost = vhost;
4001 tgt->need_login = 1;
10501e1c 4002 tgt->cancel_key = vhost->task_set++;
9a5d04fc 4003 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
072b91f9
BK		 4004 kref_init(&tgt->kref);
4005 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
4006 spin_lock_irqsave(vhost->host->host_lock, flags);
4007 list_add_tail(&tgt->queue, &vhost->targets);
4008
4009unlock_out:
4010 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4011 return 0;
4012}
4013
4014/**
4015 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
4016 * @vhost: ibmvfc host struct
4017 *
4018 * Returns:
4019 * 0 on success / other on failure
4020 **/
4021static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
4022{
4023 int i, rc;
4024
4025 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
4026 rc = ibmvfc_alloc_target(vhost,
0aab6c3f
TD		 4027 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
4028 IBMVFC_DISC_TGT_SCSI_ID_MASK);
072b91f9
BK		 4029
4030 return rc;
4031}
4032
4033/**
4034 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
4035 * @evt: ibmvfc event struct
4036 *
4037 **/
4038static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
4039{
4040 struct ibmvfc_host *vhost = evt->vhost;
4041 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
0aab6c3f 4042 u32 mad_status = be16_to_cpu(rsp->common.status);
7d0e4622 4043 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 4044
4045 switch (mad_status) {
4046 case IBMVFC_MAD_SUCCESS:
4047 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
0aab6c3f 4048 vhost->num_targets = be32_to_cpu(rsp->num_written);
072b91f9
BK		 4049 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
4050 break;
4051 case IBMVFC_MAD_FAILED:
7d0e4622
BK		 4052 level += ibmvfc_retry_host_init(vhost);
4053 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
0aab6c3f 4054 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4 4055 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
072b91f9
BK		 4056 break;
4057 case IBMVFC_MAD_DRIVER_FAILED:
4058 break;
4059 default:
4060 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
4061 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4062 break;
4063 }
4064
4065 ibmvfc_free_event(evt);
4066 wake_up(&vhost->work_wait_q);
4067}
4068
4069/**
4070 * ibmvfc_discover_targets - Send Discover Targets MAD
4071 * @vhost: ibmvfc host struct
4072 *
4073 **/
4074static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
4075{
4076 struct ibmvfc_discover_targets *mad;
4077 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4078
4079 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
4080 mad = &evt->iu.discover_targets;
4081 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 4082 mad->common.version = cpu_to_be32(1);
4083 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
4084 mad->common.length = cpu_to_be16(sizeof(*mad));
4085 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
4086 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
4087 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
072b91f9
BK		 4088 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4089
4090 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4091 ibmvfc_dbg(vhost, "Sent discover targets\n");
4092 else
4093 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4094}
4095
4096/**
4097 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4098 * @evt: ibmvfc event struct
4099 *
4100 **/
4101static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4102{
4103 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4104 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
072b91f9
BK		 4105 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4106 unsigned int npiv_max_sectors;
7d0e4622 4107 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 4108
4109 switch (mad_status) {
4110 case IBMVFC_MAD_SUCCESS:
4111 ibmvfc_free_event(evt);
4112 break;
4113 case IBMVFC_MAD_FAILED:
0aab6c3f 4114 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 4115 level += ibmvfc_retry_host_init(vhost);
072b91f9
BK		 4116 else
4117 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
7d0e4622 4118 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
0aab6c3f 4119 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4 4120 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
072b91f9
BK		 4121 ibmvfc_free_event(evt);
4122 return;
4123 case IBMVFC_MAD_CRQ_ERROR:
4124 ibmvfc_retry_host_init(vhost);
4c735987 4125 /* fall through */
072b91f9
BK		 4126 case IBMVFC_MAD_DRIVER_FAILED:
4127 ibmvfc_free_event(evt);
4128 return;
4129 default:
4130 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4131 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4132 ibmvfc_free_event(evt);
4133 return;
4134 }
4135
4136 vhost->client_migrated = 0;
4137
0aab6c3f 4138 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
072b91f9
BK		 4139 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4140 rsp->flags);
4141 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4142 wake_up(&vhost->work_wait_q);
4143 return;
4144 }
4145
0aab6c3f 4146 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
072b91f9
BK		 4147 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4148 rsp->max_cmds);
4149 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4150 wake_up(&vhost->work_wait_q);
4151 return;
4152 }
4153
79111d08 4154 vhost->logged_in = 1;
0aab6c3f 4155 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
072b91f9
BK		 4156 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4157 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4158 rsp->drc_name, npiv_max_sectors);
4159
0aab6c3f
TD		 4160 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4161 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4162 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4163 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
072b91f9
BK		 4164 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4165 fc_host_supported_classes(vhost->host) = 0;
0aab6c3f 4166 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4167 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
0aab6c3f 4168 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4169 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
0aab6c3f 4170 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
072b91f9
BK		 4171 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4172 fc_host_maxframe_size(vhost->host) =
0aab6c3f 4173 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4174
0aab6c3f 4175 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
072b91f9
BK		 4176 vhost->host->max_sectors = npiv_max_sectors;
4177 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4178 wake_up(&vhost->work_wait_q);
4179}
4180
4181/**
4182 * ibmvfc_npiv_login - Sends NPIV login
4183 * @vhost: ibmvfc host struct
4184 *
4185 **/
4186static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4187{
4188 struct ibmvfc_npiv_login_mad *mad;
4189 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4190
4191 ibmvfc_gather_partition_info(vhost);
4192 ibmvfc_set_login_info(vhost);
4193 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4194
4195 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4196 mad = &evt->iu.npiv_login;
4197 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
0aab6c3f
TD		 4198 mad->common.version = cpu_to_be32(1);
4199 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4200 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4201 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4202 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
072b91f9 4203
072b91f9
BK		 4204 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4205
4206 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4207 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4208 else
4209 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4210};
4211
79111d08
BK		 4212/**
4213 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4214 * @vhost: ibmvfc host struct
4215 *
4216 **/
4217static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4218{
4219 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4220 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
79111d08
BK		 4221
4222 ibmvfc_free_event(evt);
4223
4224 switch (mad_status) {
4225 case IBMVFC_MAD_SUCCESS:
4226 if (list_empty(&vhost->sent) &&
4227 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
861890c6 4228 ibmvfc_init_host(vhost);
79111d08
BK		 4229 return;
4230 }
4231 break;
4232 case IBMVFC_MAD_FAILED:
4233 case IBMVFC_MAD_NOT_SUPPORTED:
4234 case IBMVFC_MAD_CRQ_ERROR:
4235 case IBMVFC_MAD_DRIVER_FAILED:
4236 default:
4237 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4238 break;
4239 }
4240
4241 ibmvfc_hard_reset_host(vhost);
4242}
4243
4244/**
4245 * ibmvfc_npiv_logout - Issue an NPIV Logout
4246 * @vhost: ibmvfc host struct
4247 *
4248 **/
4249static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4250{
4251 struct ibmvfc_npiv_logout_mad *mad;
4252 struct ibmvfc_event *evt;
4253
4254 evt = ibmvfc_get_event(vhost);
4255 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4256
4257 mad = &evt->iu.npiv_logout;
4258 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 4259 mad->common.version = cpu_to_be32(1);
4260 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4261 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
79111d08
BK		 4262
4263 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4264
4265 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4266 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4267 else
4268 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4269}
4270
072b91f9
BK		 4271/**
4272 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4273 * @vhost: ibmvfc host struct
4274 *
4275 * Returns:
4276 * 1 if work to do / 0 if not
4277 **/
4278static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4279{
4280 struct ibmvfc_target *tgt;
4281
4282 list_for_each_entry(tgt, &vhost->targets, queue) {
4283 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4284 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4285 return 1;
4286 }
4287
4288 return 0;
4289}
4290
ed830385
BK		 4291/**
4292 * ibmvfc_dev_logo_to_do - Is there target logout work to do?
4293 * @vhost: ibmvfc host struct
4294 *
4295 * Returns:
4296 * 1 if work to do / 0 if not
4297 **/
4298static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost)
4299{
4300 struct ibmvfc_target *tgt;
4301
4302 list_for_each_entry(tgt, &vhost->targets, queue) {
4303 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT ||
4304 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT)
4305 return 1;
4306 }
4307 return 0;
4308}
4309
072b91f9
BK		 4310/**
4311 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4312 * @vhost: ibmvfc host struct
4313 *
4314 * Returns:
4315 * 1 if work to do / 0 if not
4316 **/
4317static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4318{
4319 struct ibmvfc_target *tgt;
4320
4321 if (kthread_should_stop())
4322 return 1;
4323 switch (vhost->action) {
4324 case IBMVFC_HOST_ACTION_NONE:
4325 case IBMVFC_HOST_ACTION_INIT_WAIT:
79111d08 4326 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4327 return 0;
4328 case IBMVFC_HOST_ACTION_TGT_INIT:
4329 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4330 if (vhost->discovery_threads == disc_threads)
4331 return 0;
4332 list_for_each_entry(tgt, &vhost->targets, queue)
4333 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4334 return 1;
4335 list_for_each_entry(tgt, &vhost->targets, queue)
4336 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4337 return 0;
4338 return 1;
ed830385
BK		 4339 case IBMVFC_HOST_ACTION_TGT_DEL:
4340 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4341 if (vhost->discovery_threads == disc_threads)
4342 return 0;
4343 list_for_each_entry(tgt, &vhost->targets, queue)
4344 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT)
4345 return 1;
4346 list_for_each_entry(tgt, &vhost->targets, queue)
4347 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT)
4348 return 0;
4349 return 1;
79111d08 4350 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 4351 case IBMVFC_HOST_ACTION_INIT:
4352 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
072b91f9 4353 case IBMVFC_HOST_ACTION_QUERY:
73ee5d86
BK		 4354 case IBMVFC_HOST_ACTION_RESET:
4355 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 4356 default:
4357 break;
f36cfe6a 4358 }
072b91f9
BK		 4359
4360 return 1;
4361}
4362
4363/**
4364 * ibmvfc_work_to_do - Is there task level work to do?
4365 * @vhost: ibmvfc host struct
4366 *
4367 * Returns:
4368 * 1 if work to do / 0 if not
4369 **/
4370static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4371{
4372 unsigned long flags;
4373 int rc;
4374
4375 spin_lock_irqsave(vhost->host->host_lock, flags);
4376 rc = __ibmvfc_work_to_do(vhost);
4377 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4378 return rc;
4379}
4380
4381/**
4382 * ibmvfc_log_ae - Log async events if necessary
4383 * @vhost: ibmvfc host struct
4384 * @events: events to log
4385 *
4386 **/
4387static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4388{
4389 if (events & IBMVFC_AE_RSCN)
4390 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4391 if ((events & IBMVFC_AE_LINKDOWN) &&
4392 vhost->state >= IBMVFC_HALTED)
4393 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4394 if ((events & IBMVFC_AE_LINKUP) &&
4395 vhost->state == IBMVFC_INITIALIZING)
4396 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4397}
4398
4399/**
4400 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4401 * @tgt: ibmvfc target struct
4402 *
4403 **/
4404static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4405{
4406 struct ibmvfc_host *vhost = tgt->vhost;
43c8da90 4407 struct fc_rport *rport;
072b91f9
BK		 4408 unsigned long flags;
4409
43c8da90
BK		 4410 tgt_dbg(tgt, "Adding rport\n");
4411 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4412 spin_lock_irqsave(vhost->host->host_lock, flags);
4413
4414 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4415 tgt_dbg(tgt, "Deleting rport\n");
4416 list_del(&tgt->queue);
d5da3040 4417 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
0883e3b3 4418 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4419 fc_remote_port_delete(rport);
4420 del_timer_sync(&tgt->timer);
4421 kref_put(&tgt->kref, ibmvfc_release_tgt);
0883e3b3 4422 return;
d5da3040
BK		 4423 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4424 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4425 return;
0883e3b3
BK		 4426 }
4427
072b91f9
BK		 4428 if (rport) {
4429 tgt_dbg(tgt, "rport add succeeded\n");
43c8da90 4430 tgt->rport = rport;
0aab6c3f 4431 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4432 rport->supported_classes = 0;
52d7e861 4433 tgt->target_id = rport->scsi_target_id;
0aab6c3f 4434 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4435 rport->supported_classes |= FC_COS_CLASS1;
0aab6c3f 4436 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4437 rport->supported_classes |= FC_COS_CLASS2;
0aab6c3f 4438 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
072b91f9 4439 rport->supported_classes |= FC_COS_CLASS3;
d31429e1 4440 if (rport->rqst_q)
8a78362c 4441 blk_queue_max_segments(rport->rqst_q, 1);
072b91f9
BK		 4442 } else
4443 tgt_dbg(tgt, "rport add failed\n");
4444 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4445}
4446
4447/**
4448 * ibmvfc_do_work - Do task level work
4449 * @vhost: ibmvfc host struct
4450 *
4451 **/
4452static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4453{
4454 struct ibmvfc_target *tgt;
4455 unsigned long flags;
4456 struct fc_rport *rport;
73ee5d86 4457 int rc;
072b91f9
BK		 4458
4459 ibmvfc_log_ae(vhost, vhost->events_to_log);
4460 spin_lock_irqsave(vhost->host->host_lock, flags);
4461 vhost->events_to_log = 0;
4462 switch (vhost->action) {
4463 case IBMVFC_HOST_ACTION_NONE:
79111d08 4464 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4465 case IBMVFC_HOST_ACTION_INIT_WAIT:
4466 break;
73ee5d86
BK		 4467 case IBMVFC_HOST_ACTION_RESET:
4468 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4469 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4470 rc = ibmvfc_reset_crq(vhost);
4471 spin_lock_irqsave(vhost->host->host_lock, flags);
d24099df
BK		 4472 if (rc == H_CLOSED)
4473 vio_enable_interrupts(to_vio_dev(vhost->dev));
38553564
BK		 4474 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4475 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
73ee5d86
BK		 4476 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4477 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4478 }
4479 break;
4480 case IBMVFC_HOST_ACTION_REENABLE:
4481 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4482 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4483 rc = ibmvfc_reenable_crq_queue(vhost);
4484 spin_lock_irqsave(vhost->host->host_lock, flags);
4485 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4486 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4487 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4488 }
4489 break;
79111d08
BK		 4490 case IBMVFC_HOST_ACTION_LOGO:
4491 vhost->job_step(vhost);
4492 break;
072b91f9
BK		 4493 case IBMVFC_HOST_ACTION_INIT:
4494 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
1c41fa82
BK		 4495 if (vhost->delay_init) {
4496 vhost->delay_init = 0;
4497 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2131b33 4498 ssleep(15);
1c41fa82
BK		 4499 return;
4500 } else
4501 vhost->job_step(vhost);
072b91f9
BK		 4502 break;
4503 case IBMVFC_HOST_ACTION_QUERY:
4504 list_for_each_entry(tgt, &vhost->targets, queue)
4505 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4506 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4507 break;
4508 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4509 list_for_each_entry(tgt, &vhost->targets, queue) {
4510 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4511 tgt->job_step(tgt);
4512 break;
4513 }
4514 }
4515
4516 if (!ibmvfc_dev_init_to_do(vhost))
4517 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4518 break;
4519 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4520 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
ed830385
BK		 4521 list_for_each_entry(tgt, &vhost->targets, queue) {
4522 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) {
4523 tgt->job_step(tgt);
4524 break;
4525 }
4526 }
4527
4528 if (ibmvfc_dev_logo_to_do(vhost)) {
4529 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4530 return;
4531 }
4532
072b91f9
BK		 4533 list_for_each_entry(tgt, &vhost->targets, queue) {
4534 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4535 tgt_dbg(tgt, "Deleting rport\n");
4536 rport = tgt->rport;
4537 tgt->rport = NULL;
4538 list_del(&tgt->queue);
d5da3040 4539 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
072b91f9
BK		 4540 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4541 if (rport)
4542 fc_remote_port_delete(rport);
10501e1c 4543 del_timer_sync(&tgt->timer);
072b91f9
BK		 4544 kref_put(&tgt->kref, ibmvfc_release_tgt);
4545 return;
4546 }
4547 }
4548
4549 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499 4550 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
43c8da90
BK		 4551 if (vhost->reinit) {
4552 vhost->reinit = 0;
4553 scsi_block_requests(vhost->host);
4554 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4555 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4556 } else {
4557 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4558 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4559 wake_up(&vhost->init_wait_q);
4560 schedule_work(&vhost->rport_add_work_q);
4561 vhost->init_retries = 0;
4562 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4563 scsi_unblock_requests(vhost->host);
4564 }
4565
10e79499
BK		 4566 return;
4567 } else {
4568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4569 vhost->job_step = ibmvfc_discover_targets;
4570 }
072b91f9
BK		 4571 } else {
4572 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4573 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4574 scsi_unblock_requests(vhost->host);
4575 wake_up(&vhost->init_wait_q);
4576 return;
4577 }
4578 break;
4579 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4580 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4581 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4582 ibmvfc_alloc_targets(vhost);
4583 spin_lock_irqsave(vhost->host->host_lock, flags);
4584 break;
4585 case IBMVFC_HOST_ACTION_TGT_INIT:
4586 list_for_each_entry(tgt, &vhost->targets, queue) {
4587 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4588 tgt->job_step(tgt);
4589 break;
4590 }
4591 }
4592
10e79499
BK		 4593 if (!ibmvfc_dev_init_to_do(vhost))
4594 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9 4595 break;
072b91f9
BK		 4596 default:
4597 break;
f36cfe6a 4598 }
072b91f9
BK		 4599
4600 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4601}
4602
4603/**
4604 * ibmvfc_work - Do task level work
4605 * @data: ibmvfc host struct
4606 *
4607 * Returns:
4608 * zero
4609 **/
4610static int ibmvfc_work(void *data)
4611{
4612 struct ibmvfc_host *vhost = data;
4613 int rc;
4614
8698a745 4615 set_user_nice(current, MIN_NICE);
072b91f9
BK		 4616
4617 while (1) {
4618 rc = wait_event_interruptible(vhost->work_wait_q,
4619 ibmvfc_work_to_do(vhost));
4620
4621 BUG_ON(rc);
4622
4623 if (kthread_should_stop())
4624 break;
4625
4626 ibmvfc_do_work(vhost);
4627 }
4628
4629 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4630 return 0;
4631}
4632
4633/**
4634 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4635 * @vhost: ibmvfc host struct
4636 *
4637 * Allocates a page for messages, maps it for dma, and registers
4638 * the crq with the hypervisor.
4639 *
4640 * Return value:
4641 * zero on success / other on failure
4642 **/
4643static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4644{
4645 int rc, retrc = -ENOMEM;
4646 struct device *dev = vhost->dev;
4647 struct vio_dev *vdev = to_vio_dev(dev);
4648 struct ibmvfc_crq_queue *crq = &vhost->crq;
4649
4650 ENTER;
4651 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4652
4653 if (!crq->msgs)
4654 return -ENOMEM;
4655
4656 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4657 crq->msg_token = dma_map_single(dev, crq->msgs,
4658 PAGE_SIZE, DMA_BIDIRECTIONAL);
4659
8d8bb39b 4660 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 4661 goto map_failed;
4662
4663 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4664 crq->msg_token, PAGE_SIZE);
4665
4666 if (rc == H_RESOURCE)
4667 /* maybe kexecing and resource is busy. try a reset */
4668 retrc = rc = ibmvfc_reset_crq(vhost);
4669
4670 if (rc == H_CLOSED)
4671 dev_warn(dev, "Partner adapter not ready\n");
4672 else if (rc) {
4673 dev_warn(dev, "Error %d opening adapter\n", rc);
4674 goto reg_crq_failed;
4675 }
4676
4677 retrc = 0;
4678
039a0898
BK		 4679 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4680
072b91f9
BK		 4681 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4682 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4683 goto req_irq_failed;
4684 }
4685
4686 if ((rc = vio_enable_interrupts(vdev))) {
4687 dev_err(dev, "Error %d enabling interrupts\n", rc);
4688 goto req_irq_failed;
4689 }
4690
4691 crq->cur = 0;
4692 LEAVE;
4693 return retrc;
4694
4695req_irq_failed:
039a0898 4696 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 4697 do {
4698 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4699 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4700reg_crq_failed:
4701 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4702map_failed:
4703 free_page((unsigned long)crq->msgs);
4704 return retrc;
4705}
4706
4707/**
4708 * ibmvfc_free_mem - Free memory for vhost
4709 * @vhost: ibmvfc host struct
4710 *
4711 * Return value:
4712 * none
4713 **/
4714static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4715{
4716 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4717
4718 ENTER;
4719 mempool_destroy(vhost->tgt_pool);
4720 kfree(vhost->trace);
4721 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4722 vhost->disc_buf_dma);
4723 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4724 vhost->login_buf, vhost->login_buf_dma);
4725 dma_pool_destroy(vhost->sg_pool);
4726 dma_unmap_single(vhost->dev, async_q->msg_token,
4727 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4728 free_page((unsigned long)async_q->msgs);
4729 LEAVE;
4730}
4731
4732/**
4733 * ibmvfc_alloc_mem - Allocate memory for vhost
4734 * @vhost: ibmvfc host struct
4735 *
4736 * Return value:
4737 * 0 on success / non-zero on failure
4738 **/
4739static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4740{
4741 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4742 struct device *dev = vhost->dev;
4743
4744 ENTER;
4745 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4746 if (!async_q->msgs) {
4747 dev_err(dev, "Couldn't allocate async queue.\n");
4748 goto nomem;
4749 }
4750
4751 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4752 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4753 async_q->size * sizeof(*async_q->msgs),
4754 DMA_BIDIRECTIONAL);
4755
8d8bb39b 4756 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 4757 dev_err(dev, "Failed to map async queue\n");
4758 goto free_async_crq;
4759 }
4760
4761 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4762 SG_ALL * sizeof(struct srp_direct_buf),
4763 sizeof(struct srp_direct_buf), 0);
4764
4765 if (!vhost->sg_pool) {
4766 dev_err(dev, "Failed to allocate sg pool\n");
4767 goto unmap_async_crq;
4768 }
4769
4770 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4771 &vhost->login_buf_dma, GFP_KERNEL);
4772
4773 if (!vhost->login_buf) {
4774 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4775 goto free_sg_pool;
4776 }
4777
4778 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4779 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4780 &vhost->disc_buf_dma, GFP_KERNEL);
4781
4782 if (!vhost->disc_buf) {
4783 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4784 goto free_login_buffer;
4785 }
4786
4787 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4788 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4789
4790 if (!vhost->trace)
4791 goto free_disc_buffer;
4792
d6886692 4793 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
072b91f9
BK		 4794 sizeof(struct ibmvfc_target));
4795
4796 if (!vhost->tgt_pool) {
4797 dev_err(dev, "Couldn't allocate target memory pool\n");
4798 goto free_trace;
4799 }
4800
4801 LEAVE;
4802 return 0;
4803
4804free_trace:
4805 kfree(vhost->trace);
4806free_disc_buffer:
4807 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4808 vhost->disc_buf_dma);
4809free_login_buffer:
4810 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4811 vhost->login_buf, vhost->login_buf_dma);
4812free_sg_pool:
4813 dma_pool_destroy(vhost->sg_pool);
4814unmap_async_crq:
4815 dma_unmap_single(dev, async_q->msg_token,
4816 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4817free_async_crq:
4818 free_page((unsigned long)async_q->msgs);
4819nomem:
4820 LEAVE;
4821 return -ENOMEM;
4822}
4823
43c8da90
BK		 4824/**
4825 * ibmvfc_rport_add_thread - Worker thread for rport adds
4826 * @work: work struct
4827 *
4828 **/
4829static void ibmvfc_rport_add_thread(struct work_struct *work)
4830{
4831 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4832 rport_add_work_q);
4833 struct ibmvfc_target *tgt;
4834 struct fc_rport *rport;
4835 unsigned long flags;
4836 int did_work;
4837
4838 ENTER;
4839 spin_lock_irqsave(vhost->host->host_lock, flags);
4840 do {
4841 did_work = 0;
4842 if (vhost->state != IBMVFC_ACTIVE)
4843 break;
4844
4845 list_for_each_entry(tgt, &vhost->targets, queue) {
4846 if (tgt->add_rport) {
4847 did_work = 1;
4848 tgt->add_rport = 0;
4849 kref_get(&tgt->kref);
4850 rport = tgt->rport;
4851 if (!rport) {
4852 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4853 ibmvfc_tgt_add_rport(tgt);
4854 } else if (get_device(&rport->dev)) {
4855 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4856 tgt_dbg(tgt, "Setting rport roles\n");
4857 fc_remote_port_rolechg(rport, tgt->ids.roles);
4858 put_device(&rport->dev);
0073887a
DC		 4859 } else {
4860 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4861 }
4862
4863 kref_put(&tgt->kref, ibmvfc_release_tgt);
4864 spin_lock_irqsave(vhost->host->host_lock, flags);
4865 break;
4866 }
4867 }
4868 } while(did_work);
4869
4870 if (vhost->state == IBMVFC_ACTIVE)
4871 vhost->scan_complete = 1;
4872 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4873 LEAVE;
4874}
4875
072b91f9
BK		 4876/**
4877 * ibmvfc_probe - Adapter hot plug add entry point
4878 * @vdev: vio device struct
4879 * @id: vio device id struct
4880 *
4881 * Return value:
4882 * 0 on success / non-zero on failure
4883 **/
4884static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4885{
4886 struct ibmvfc_host *vhost;
4887 struct Scsi_Host *shost;
4888 struct device *dev = &vdev->dev;
4889 int rc = -ENOMEM;
4890
4891 ENTER;
4892 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4893 if (!shost) {
4894 dev_err(dev, "Couldn't allocate host data\n");
4895 goto out;
4896 }
4897
4898 shost->transportt = ibmvfc_transport_template;
4899 shost->can_queue = max_requests;
4900 shost->max_lun = max_lun;
4901 shost->max_id = max_targets;
4902 shost->max_sectors = IBMVFC_MAX_SECTORS;
4903 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4904 shost->unique_id = shost->host_no;
4905
4906 vhost = shost_priv(shost);
4907 INIT_LIST_HEAD(&vhost->sent);
4908 INIT_LIST_HEAD(&vhost->free);
4909 INIT_LIST_HEAD(&vhost->targets);
4910 sprintf(vhost->name, IBMVFC_NAME);
4911 vhost->host = shost;
4912 vhost->dev = dev;
4913 vhost->partition_number = -1;
4914 vhost->log_level = log_level;
10501e1c 4915 vhost->task_set = 1;
072b91f9
BK		 4916 strcpy(vhost->partition_name, "UNKNOWN");
4917 init_waitqueue_head(&vhost->work_wait_q);
4918 init_waitqueue_head(&vhost->init_wait_q);
43c8da90 4919 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
d31429e1 4920 mutex_init(&vhost->passthru_mutex);
072b91f9
BK		 4921
4922 if ((rc = ibmvfc_alloc_mem(vhost)))
4923 goto free_scsi_host;
4924
4925 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4926 shost->host_no);
4927
4928 if (IS_ERR(vhost->work_thread)) {
4929 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4930 PTR_ERR(vhost->work_thread));
4931 goto free_host_mem;
4932 }
4933
4934 if ((rc = ibmvfc_init_crq(vhost))) {
4935 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4936 goto kill_kthread;
4937 }
4938
4939 if ((rc = ibmvfc_init_event_pool(vhost))) {
4940 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4941 goto release_crq;
4942 }
4943
4944 if ((rc = scsi_add_host(shost, dev)))
4945 goto release_event_pool;
4946
a5110f29
MC		 4947 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4948
072b91f9
BK		 4949 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4950 &ibmvfc_trace_attr))) {
4951 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4952 goto remove_shost;
4953 }
4954
d31429e1 4955 if (shost_to_fc_host(shost)->rqst_q)
8a78362c 4956 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
072b91f9
BK		 4957 dev_set_drvdata(dev, vhost);
4958 spin_lock(&ibmvfc_driver_lock);
4959 list_add_tail(&vhost->queue, &ibmvfc_head);
4960 spin_unlock(&ibmvfc_driver_lock);
4961
4962 ibmvfc_send_crq_init(vhost);
4963 scsi_scan_host(shost);
4964 return 0;
4965
4966remove_shost:
4967 scsi_remove_host(shost);
4968release_event_pool:
4969 ibmvfc_free_event_pool(vhost);
4970release_crq:
4971 ibmvfc_release_crq_queue(vhost);
4972kill_kthread:
4973 kthread_stop(vhost->work_thread);
4974free_host_mem:
4975 ibmvfc_free_mem(vhost);
4976free_scsi_host:
4977 scsi_host_put(shost);
4978out:
4979 LEAVE;
4980 return rc;
4981}
4982
4983/**
4984 * ibmvfc_remove - Adapter hot plug remove entry point
4985 * @vdev: vio device struct
4986 *
4987 * Return value:
4988 * 0
4989 **/
4990static int ibmvfc_remove(struct vio_dev *vdev)
4991{
4992 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4993 unsigned long flags;
4994
4995 ENTER;
4996 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
70431105
BK		 4997
4998 spin_lock_irqsave(vhost->host->host_lock, flags);
2d0da2a4 4999 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
70431105
BK		 5000 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5001
2d0da2a4
BK		 5002 ibmvfc_wait_while_resetting(vhost);
5003 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 5004 kthread_stop(vhost->work_thread);
5005 fc_remove_host(vhost->host);
5006 scsi_remove_host(vhost->host);
072b91f9
BK		 5007
5008 spin_lock_irqsave(vhost->host->host_lock, flags);
5009 ibmvfc_purge_requests(vhost, DID_ERROR);
072b91f9 5010 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5578257c 5011 ibmvfc_free_event_pool(vhost);
072b91f9
BK		 5012
5013 ibmvfc_free_mem(vhost);
5014 spin_lock(&ibmvfc_driver_lock);
5015 list_del(&vhost->queue);
5016 spin_unlock(&ibmvfc_driver_lock);
5017 scsi_host_put(vhost->host);
5018 LEAVE;
5019 return 0;
5020}
5021
b0f4d4cf
BK		 5022/**
5023 * ibmvfc_resume - Resume from suspend
5024 * @dev: device struct
5025 *
5026 * We may have lost an interrupt across suspend/resume, so kick the
5027 * interrupt handler
5028 *
5029 */
5030static int ibmvfc_resume(struct device *dev)
5031{
5032 unsigned long flags;
5033 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
5034 struct vio_dev *vdev = to_vio_dev(dev);
5035
5036 spin_lock_irqsave(vhost->host->host_lock, flags);
5037 vio_disable_interrupts(vdev);
5038 tasklet_schedule(&vhost->tasklet);
5039 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5040 return 0;
5041}
5042
39c1ffec
BK		 5043/**
5044 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
5045 * @vdev: vio device struct
5046 *
5047 * Return value:
5048 * Number of bytes the driver will need to DMA map at the same time in
5049 * order to perform well.
5050 */
5051static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
5052{
5053 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
5054 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
5055}
5056
e4df3eaa 5057static const struct vio_device_id ibmvfc_device_table[] = {
072b91f9
BK		 5058 {"fcp", "IBM,vfc-client"},
5059 { "", "" }
5060};
5061MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
5062
e4a80c31 5063static const struct dev_pm_ops ibmvfc_pm_ops = {
b0f4d4cf
BK		 5064 .resume = ibmvfc_resume
5065};
5066
072b91f9
BK		 5067static struct vio_driver ibmvfc_driver = {
5068 .id_table = ibmvfc_device_table,
5069 .probe = ibmvfc_probe,
5070 .remove = ibmvfc_remove,
39c1ffec 5071 .get_desired_dma = ibmvfc_get_desired_dma,
cb52d897
BH		 5072 .name = IBMVFC_NAME,
5073 .pm = &ibmvfc_pm_ops,
072b91f9
BK		 5074};
5075
5076static struct fc_function_template ibmvfc_transport_functions = {
5077 .show_host_fabric_name = 1,
5078 .show_host_node_name = 1,
5079 .show_host_port_name = 1,
5080 .show_host_supported_classes = 1,
5081 .show_host_port_type = 1,
5082 .show_host_port_id = 1,
9ab3610f 5083 .show_host_maxframe_size = 1,
072b91f9
BK		 5084
5085 .get_host_port_state = ibmvfc_get_host_port_state,
5086 .show_host_port_state = 1,
5087
5088 .get_host_speed = ibmvfc_get_host_speed,
5089 .show_host_speed = 1,
5090
5091 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
5092 .terminate_rport_io = ibmvfc_terminate_rport_io,
5093
5094 .show_rport_maxframe_size = 1,
5095 .show_rport_supported_classes = 1,
5096
5097 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
5098 .show_rport_dev_loss_tmo = 1,
5099
5100 .get_starget_node_name = ibmvfc_get_starget_node_name,
5101 .show_starget_node_name = 1,
5102
5103 .get_starget_port_name = ibmvfc_get_starget_port_name,
5104 .show_starget_port_name = 1,
5105
5106 .get_starget_port_id = ibmvfc_get_starget_port_id,
5107 .show_starget_port_id = 1,
d31429e1
BK		 5108
5109 .bsg_request = ibmvfc_bsg_request,
5110 .bsg_timeout = ibmvfc_bsg_timeout,
072b91f9
BK		 5111};
5112
5113/**
5114 * ibmvfc_module_init - Initialize the ibmvfc module
5115 *
5116 * Return value:
5117 * 0 on success / other on failure
5118 **/
5119static int __init ibmvfc_module_init(void)
5120{
5121 int rc;
5122
5123 if (!firmware_has_feature(FW_FEATURE_VIO))
5124 return -ENODEV;
5125
5126 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
5127 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
5128
5129 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
5130 if (!ibmvfc_transport_template)
5131 return -ENOMEM;
5132
5133 rc = vio_register_driver(&ibmvfc_driver);
5134 if (rc)
5135 fc_release_transport(ibmvfc_transport_template);
5136 return rc;
5137}
5138
5139/**
5140 * ibmvfc_module_exit - Teardown the ibmvfc module
5141 *
5142 * Return value:
5143 * nothing
5144 **/
5145static void __exit ibmvfc_module_exit(void)
5146{
5147 vio_unregister_driver(&ibmvfc_driver);
5148 fc_release_transport(ibmvfc_transport_template);
5149}
5150
5151module_init(ibmvfc_module_init);
5152module_exit(ibmvfc_module_exit);
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