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Merge tag 'ceph-for-4.13-rc8' of git://github.com/ceph/ceph-client
[linux/fpc-iii.git] / drivers / scsi / ibmvscsi / ibmvfc.c
blobcc4e05be8d4a24aa01782a62ca2fd3d157d24777
1 /*
2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
3 *
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
5 *
6 * Copyright (C) IBM Corporation, 2008
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dmapool.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/kthread.h>
31 #include <linux/slab.h>
32 #include <linux/of.h>
33 #include <linux/pm.h>
34 #include <linux/stringify.h>
35 #include <linux/bsg-lib.h>
36 #include <asm/firmware.h>
37 #include <asm/irq.h>
38 #include <asm/vio.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_cmnd.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_tcq.h>
44 #include <scsi/scsi_transport_fc.h>
45 #include <scsi/scsi_bsg_fc.h>
46 #include "ibmvfc.h"
47
48 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
49 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
50 static u64 max_lun = IBMVFC_MAX_LUN;
51 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
52 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
53 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
54 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
55 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
56 static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
57 static LIST_HEAD(ibmvfc_head);
58 static DEFINE_SPINLOCK(ibmvfc_driver_lock);
59 static struct scsi_transport_template *ibmvfc_transport_template;
60
61 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
62 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
63 MODULE_LICENSE("GPL");
64 MODULE_VERSION(IBMVFC_DRIVER_VERSION);
65
66 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
67 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
68 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
69 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
70 MODULE_PARM_DESC(default_timeout,
71 "Default timeout in seconds for initialization and EH commands. "
72 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
73 module_param_named(max_requests, max_requests, uint, S_IRUGO);
74 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
75 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
76 module_param_named(max_lun, max_lun, ullong, S_IRUGO);
77 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
78 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
79 module_param_named(max_targets, max_targets, uint, S_IRUGO);
80 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
81 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
82 module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
83 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
84 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
85 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
86 MODULE_PARM_DESC(debug, "Enable driver debug information. "
87 "[Default=" __stringify(IBMVFC_DEBUG) "]");
88 module_param_named(log_level, log_level, uint, 0);
89 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
90 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
91 module_param_named(cls3_error, cls3_error, uint, 0);
92 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
93 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
94
95 static const struct {
96 u16 status;
97 u16 error;
98 u8 result;
99 u8 retry;
100 int log;
101 char *name;
102 } cmd_status [] = {
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
116 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
117
118 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
125 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
126 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
127 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
128
129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
132 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
133 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
134 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
135 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
137 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
138 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
139 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
140
141 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
142 };
143
144 static void ibmvfc_npiv_login(struct ibmvfc_host *);
145 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
146 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
147 static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
148 static void ibmvfc_npiv_logout(struct ibmvfc_host *);
149
150 static const char *unknown_error = "unknown error";
151
152 #ifdef CONFIG_SCSI_IBMVFC_TRACE
153 /**
154 * ibmvfc_trc_start - Log a start trace entry
155 * @evt: ibmvfc event struct
156 *
157 **/
158 static void ibmvfc_trc_start(struct ibmvfc_event *evt)
159 {
160 struct ibmvfc_host *vhost = evt->vhost;
161 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
162 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
163 struct ibmvfc_trace_entry *entry;
164
165 entry = &vhost->trace[vhost->trace_index++];
166 entry->evt = evt;
167 entry->time = jiffies;
168 entry->fmt = evt->crq.format;
169 entry->type = IBMVFC_TRC_START;
170
171 switch (entry->fmt) {
172 case IBMVFC_CMD_FORMAT:
173 entry->op_code = vfc_cmd->iu.cdb[0];
174 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
175 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
176 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
177 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
178 break;
179 case IBMVFC_MAD_FORMAT:
180 entry->op_code = be32_to_cpu(mad->opcode);
181 break;
182 default:
183 break;
184 };
185 }
186
187 /**
188 * ibmvfc_trc_end - Log an end trace entry
189 * @evt: ibmvfc event struct
190 *
191 **/
192 static void ibmvfc_trc_end(struct ibmvfc_event *evt)
193 {
194 struct ibmvfc_host *vhost = evt->vhost;
195 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
196 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
197 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
198
199 entry->evt = evt;
200 entry->time = jiffies;
201 entry->fmt = evt->crq.format;
202 entry->type = IBMVFC_TRC_END;
203
204 switch (entry->fmt) {
205 case IBMVFC_CMD_FORMAT:
206 entry->op_code = vfc_cmd->iu.cdb[0];
207 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
208 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
209 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
210 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
211 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
212 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
213 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
214 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
215 break;
216 case IBMVFC_MAD_FORMAT:
217 entry->op_code = be32_to_cpu(mad->opcode);
218 entry->u.end.status = be16_to_cpu(mad->status);
219 break;
220 default:
221 break;
222
223 };
224 }
225
226 #else
227 #define ibmvfc_trc_start(evt) do { } while (0)
228 #define ibmvfc_trc_end(evt) do { } while (0)
229 #endif
230
231 /**
232 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
233 * @status: status / error class
234 * @error: error
235 *
236 * Return value:
237 * index into cmd_status / -EINVAL on failure
238 **/
239 static int ibmvfc_get_err_index(u16 status, u16 error)
240 {
241 int i;
242
243 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
244 if ((cmd_status[i].status & status) == cmd_status[i].status &&
245 cmd_status[i].error == error)
246 return i;
247
248 return -EINVAL;
249 }
250
251 /**
252 * ibmvfc_get_cmd_error - Find the error description for the fcp response
253 * @status: status / error class
254 * @error: error
255 *
256 * Return value:
257 * error description string
258 **/
259 static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
260 {
261 int rc = ibmvfc_get_err_index(status, error);
262 if (rc >= 0)
263 return cmd_status[rc].name;
264 return unknown_error;
265 }
266
267 /**
268 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
269 * @vfc_cmd: ibmvfc command struct
270 *
271 * Return value:
272 * SCSI result value to return for completed command
273 **/
274 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
275 {
276 int err;
277 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
278 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
279
280 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
281 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
282 rsp->data.info.rsp_code))
283 return DID_ERROR << 16;
284
285 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
286 if (err >= 0)
287 return rsp->scsi_status | (cmd_status[err].result << 16);
288 return rsp->scsi_status | (DID_ERROR << 16);
289 }
290
291 /**
292 * ibmvfc_retry_cmd - Determine if error status is retryable
293 * @status: status / error class
294 * @error: error
295 *
296 * Return value:
297 * 1 if error should be retried / 0 if it should not
298 **/
299 static int ibmvfc_retry_cmd(u16 status, u16 error)
300 {
301 int rc = ibmvfc_get_err_index(status, error);
302
303 if (rc >= 0)
304 return cmd_status[rc].retry;
305 return 1;
306 }
307
308 static const char *unknown_fc_explain = "unknown fc explain";
309
310 static const struct {
311 u16 fc_explain;
312 char *name;
313 } ls_explain [] = {
314 { 0x00, "no additional explanation" },
315 { 0x01, "service parameter error - options" },
316 { 0x03, "service parameter error - initiator control" },
317 { 0x05, "service parameter error - recipient control" },
318 { 0x07, "service parameter error - received data field size" },
319 { 0x09, "service parameter error - concurrent seq" },
320 { 0x0B, "service parameter error - credit" },
321 { 0x0D, "invalid N_Port/F_Port_Name" },
322 { 0x0E, "invalid node/Fabric Name" },
323 { 0x0F, "invalid common service parameters" },
324 { 0x11, "invalid association header" },
325 { 0x13, "association header required" },
326 { 0x15, "invalid originator S_ID" },
327 { 0x17, "invalid OX_ID-RX-ID combination" },
328 { 0x19, "command (request) already in progress" },
329 { 0x1E, "N_Port Login requested" },
330 { 0x1F, "Invalid N_Port_ID" },
331 };
332
333 static const struct {
334 u16 fc_explain;
335 char *name;
336 } gs_explain [] = {
337 { 0x00, "no additional explanation" },
338 { 0x01, "port identifier not registered" },
339 { 0x02, "port name not registered" },
340 { 0x03, "node name not registered" },
341 { 0x04, "class of service not registered" },
342 { 0x06, "initial process associator not registered" },
343 { 0x07, "FC-4 TYPEs not registered" },
344 { 0x08, "symbolic port name not registered" },
345 { 0x09, "symbolic node name not registered" },
346 { 0x0A, "port type not registered" },
347 { 0xF0, "authorization exception" },
348 { 0xF1, "authentication exception" },
349 { 0xF2, "data base full" },
350 { 0xF3, "data base empty" },
351 { 0xF4, "processing request" },
352 { 0xF5, "unable to verify connection" },
353 { 0xF6, "devices not in a common zone" },
354 };
355
356 /**
357 * ibmvfc_get_ls_explain - Return the FC Explain description text
358 * @status: FC Explain status
359 *
360 * Returns:
361 * error string
362 **/
363 static const char *ibmvfc_get_ls_explain(u16 status)
364 {
365 int i;
366
367 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
368 if (ls_explain[i].fc_explain == status)
369 return ls_explain[i].name;
370
371 return unknown_fc_explain;
372 }
373
374 /**
375 * ibmvfc_get_gs_explain - Return the FC Explain description text
376 * @status: FC Explain status
377 *
378 * Returns:
379 * error string
380 **/
381 static const char *ibmvfc_get_gs_explain(u16 status)
382 {
383 int i;
384
385 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
386 if (gs_explain[i].fc_explain == status)
387 return gs_explain[i].name;
388
389 return unknown_fc_explain;
390 }
391
392 static const struct {
393 enum ibmvfc_fc_type fc_type;
394 char *name;
395 } fc_type [] = {
396 { IBMVFC_FABRIC_REJECT, "fabric reject" },
397 { IBMVFC_PORT_REJECT, "port reject" },
398 { IBMVFC_LS_REJECT, "ELS reject" },
399 { IBMVFC_FABRIC_BUSY, "fabric busy" },
400 { IBMVFC_PORT_BUSY, "port busy" },
401 { IBMVFC_BASIC_REJECT, "basic reject" },
402 };
403
404 static const char *unknown_fc_type = "unknown fc type";
405
406 /**
407 * ibmvfc_get_fc_type - Return the FC Type description text
408 * @status: FC Type error status
409 *
410 * Returns:
411 * error string
412 **/
413 static const char *ibmvfc_get_fc_type(u16 status)
414 {
415 int i;
416
417 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
418 if (fc_type[i].fc_type == status)
419 return fc_type[i].name;
420
421 return unknown_fc_type;
422 }
423
424 /**
425 * ibmvfc_set_tgt_action - Set the next init action for the target
426 * @tgt: ibmvfc target struct
427 * @action: action to perform
428 *
429 **/
430 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
431 enum ibmvfc_target_action action)
432 {
433 switch (tgt->action) {
434 case IBMVFC_TGT_ACTION_DEL_RPORT:
435 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
436 tgt->action = action;
437 case IBMVFC_TGT_ACTION_DELETED_RPORT:
438 break;
439 default:
440 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
441 tgt->add_rport = 0;
442 tgt->action = action;
443 break;
444 }
445 }
446
447 /**
448 * ibmvfc_set_host_state - Set the state for the host
449 * @vhost: ibmvfc host struct
450 * @state: state to set host to
451 *
452 * Returns:
453 * 0 if state changed / non-zero if not changed
454 **/
455 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
456 enum ibmvfc_host_state state)
457 {
458 int rc = 0;
459
460 switch (vhost->state) {
461 case IBMVFC_HOST_OFFLINE:
462 rc = -EINVAL;
463 break;
464 default:
465 vhost->state = state;
466 break;
467 };
468
469 return rc;
470 }
471
472 /**
473 * ibmvfc_set_host_action - Set the next init action for the host
474 * @vhost: ibmvfc host struct
475 * @action: action to perform
476 *
477 **/
478 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
479 enum ibmvfc_host_action action)
480 {
481 switch (action) {
482 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
483 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
484 vhost->action = action;
485 break;
486 case IBMVFC_HOST_ACTION_LOGO_WAIT:
487 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
488 vhost->action = action;
489 break;
490 case IBMVFC_HOST_ACTION_INIT_WAIT:
491 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
492 vhost->action = action;
493 break;
494 case IBMVFC_HOST_ACTION_QUERY:
495 switch (vhost->action) {
496 case IBMVFC_HOST_ACTION_INIT_WAIT:
497 case IBMVFC_HOST_ACTION_NONE:
498 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
499 vhost->action = action;
500 break;
501 default:
502 break;
503 };
504 break;
505 case IBMVFC_HOST_ACTION_TGT_INIT:
506 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
507 vhost->action = action;
508 break;
509 case IBMVFC_HOST_ACTION_INIT:
510 case IBMVFC_HOST_ACTION_TGT_DEL:
511 switch (vhost->action) {
512 case IBMVFC_HOST_ACTION_RESET:
513 case IBMVFC_HOST_ACTION_REENABLE:
514 break;
515 default:
516 vhost->action = action;
517 break;
518 };
519 break;
520 case IBMVFC_HOST_ACTION_LOGO:
521 case IBMVFC_HOST_ACTION_QUERY_TGTS:
522 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
523 case IBMVFC_HOST_ACTION_NONE:
524 case IBMVFC_HOST_ACTION_RESET:
525 case IBMVFC_HOST_ACTION_REENABLE:
526 default:
527 vhost->action = action;
528 break;
529 };
530 }
531
532 /**
533 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
534 * @vhost: ibmvfc host struct
535 *
536 * Return value:
537 * nothing
538 **/
539 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
540 {
541 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
542 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
543 scsi_block_requests(vhost->host);
544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
545 }
546 } else
547 vhost->reinit = 1;
548
549 wake_up(&vhost->work_wait_q);
550 }
551
552 /**
553 * ibmvfc_link_down - Handle a link down event from the adapter
554 * @vhost: ibmvfc host struct
555 * @state: ibmvfc host state to enter
556 *
557 **/
558 static void ibmvfc_link_down(struct ibmvfc_host *vhost,
559 enum ibmvfc_host_state state)
560 {
561 struct ibmvfc_target *tgt;
562
563 ENTER;
564 scsi_block_requests(vhost->host);
565 list_for_each_entry(tgt, &vhost->targets, queue)
566 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
567 ibmvfc_set_host_state(vhost, state);
568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
569 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
570 wake_up(&vhost->work_wait_q);
571 LEAVE;
572 }
573
574 /**
575 * ibmvfc_init_host - Start host initialization
576 * @vhost: ibmvfc host struct
577 *
578 * Return value:
579 * nothing
580 **/
581 static void ibmvfc_init_host(struct ibmvfc_host *vhost)
582 {
583 struct ibmvfc_target *tgt;
584
585 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
586 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
587 dev_err(vhost->dev,
588 "Host initialization retries exceeded. Taking adapter offline\n");
589 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
590 return;
591 }
592 }
593
594 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
595 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
596 vhost->async_crq.cur = 0;
597
598 list_for_each_entry(tgt, &vhost->targets, queue)
599 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
600 scsi_block_requests(vhost->host);
601 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
602 vhost->job_step = ibmvfc_npiv_login;
603 wake_up(&vhost->work_wait_q);
604 }
605 }
606
607 /**
608 * ibmvfc_send_crq - Send a CRQ
609 * @vhost: ibmvfc host struct
610 * @word1: the first 64 bits of the data
611 * @word2: the second 64 bits of the data
612 *
613 * Return value:
614 * 0 on success / other on failure
615 **/
616 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
617 {
618 struct vio_dev *vdev = to_vio_dev(vhost->dev);
619 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
620 }
621
622 /**
623 * ibmvfc_send_crq_init - Send a CRQ init message
624 * @vhost: ibmvfc host struct
625 *
626 * Return value:
627 * 0 on success / other on failure
628 **/
629 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
630 {
631 ibmvfc_dbg(vhost, "Sending CRQ init\n");
632 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
633 }
634
635 /**
636 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
637 * @vhost: ibmvfc host struct
638 *
639 * Return value:
640 * 0 on success / other on failure
641 **/
642 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
643 {
644 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
645 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
646 }
647
648 /**
649 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
650 * @vhost: ibmvfc host struct
651 *
652 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
653 * the crq with the hypervisor.
654 **/
655 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
656 {
657 long rc = 0;
658 struct vio_dev *vdev = to_vio_dev(vhost->dev);
659 struct ibmvfc_crq_queue *crq = &vhost->crq;
660
661 ibmvfc_dbg(vhost, "Releasing CRQ\n");
662 free_irq(vdev->irq, vhost);
663 tasklet_kill(&vhost->tasklet);
664 do {
665 if (rc)
666 msleep(100);
667 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
668 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
669
670 vhost->state = IBMVFC_NO_CRQ;
671 vhost->logged_in = 0;
672 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
673 free_page((unsigned long)crq->msgs);
674 }
675
676 /**
677 * ibmvfc_reenable_crq_queue - reenables the CRQ
678 * @vhost: ibmvfc host struct
679 *
680 * Return value:
681 * 0 on success / other on failure
682 **/
683 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
684 {
685 int rc = 0;
686 struct vio_dev *vdev = to_vio_dev(vhost->dev);
687
688 /* Re-enable the CRQ */
689 do {
690 if (rc)
691 msleep(100);
692 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
693 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
694
695 if (rc)
696 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
697
698 return rc;
699 }
700
701 /**
702 * ibmvfc_reset_crq - resets a crq after a failure
703 * @vhost: ibmvfc host struct
704 *
705 * Return value:
706 * 0 on success / other on failure
707 **/
708 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
709 {
710 int rc = 0;
711 unsigned long flags;
712 struct vio_dev *vdev = to_vio_dev(vhost->dev);
713 struct ibmvfc_crq_queue *crq = &vhost->crq;
714
715 /* Close the CRQ */
716 do {
717 if (rc)
718 msleep(100);
719 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
720 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
721
722 spin_lock_irqsave(vhost->host->host_lock, flags);
723 vhost->state = IBMVFC_NO_CRQ;
724 vhost->logged_in = 0;
725
726 /* Clean out the queue */
727 memset(crq->msgs, 0, PAGE_SIZE);
728 crq->cur = 0;
729
730 /* And re-open it again */
731 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
732 crq->msg_token, PAGE_SIZE);
733
734 if (rc == H_CLOSED)
735 /* Adapter is good, but other end is not ready */
736 dev_warn(vhost->dev, "Partner adapter not ready\n");
737 else if (rc != 0)
738 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
739 spin_unlock_irqrestore(vhost->host->host_lock, flags);
740
741 return rc;
742 }
743
744 /**
745 * ibmvfc_valid_event - Determines if event is valid.
746 * @pool: event_pool that contains the event
747 * @evt: ibmvfc event to be checked for validity
748 *
749 * Return value:
750 * 1 if event is valid / 0 if event is not valid
751 **/
752 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
753 struct ibmvfc_event *evt)
754 {
755 int index = evt - pool->events;
756 if (index < 0 || index >= pool->size) /* outside of bounds */
757 return 0;
758 if (evt != pool->events + index) /* unaligned */
759 return 0;
760 return 1;
761 }
762
763 /**
764 * ibmvfc_free_event - Free the specified event
765 * @evt: ibmvfc_event to be freed
766 *
767 **/
768 static void ibmvfc_free_event(struct ibmvfc_event *evt)
769 {
770 struct ibmvfc_host *vhost = evt->vhost;
771 struct ibmvfc_event_pool *pool = &vhost->pool;
772
773 BUG_ON(!ibmvfc_valid_event(pool, evt));
774 BUG_ON(atomic_inc_return(&evt->free) != 1);
775 list_add_tail(&evt->queue, &vhost->free);
776 }
777
778 /**
779 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
780 * @evt: ibmvfc event struct
781 *
782 * This function does not setup any error status, that must be done
783 * before this function gets called.
784 **/
785 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
786 {
787 struct scsi_cmnd *cmnd = evt->cmnd;
788
789 if (cmnd) {
790 scsi_dma_unmap(cmnd);
791 cmnd->scsi_done(cmnd);
792 }
793
794 if (evt->eh_comp)
795 complete(evt->eh_comp);
796
797 ibmvfc_free_event(evt);
798 }
799
800 /**
801 * ibmvfc_fail_request - Fail request with specified error code
802 * @evt: ibmvfc event struct
803 * @error_code: error code to fail request with
804 *
805 * Return value:
806 * none
807 **/
808 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
809 {
810 if (evt->cmnd) {
811 evt->cmnd->result = (error_code << 16);
812 evt->done = ibmvfc_scsi_eh_done;
813 } else
814 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
815
816 list_del(&evt->queue);
817 del_timer(&evt->timer);
818 ibmvfc_trc_end(evt);
819 evt->done(evt);
820 }
821
822 /**
823 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
824 * @vhost: ibmvfc host struct
825 * @error_code: error code to fail requests with
826 *
827 * Return value:
828 * none
829 **/
830 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
831 {
832 struct ibmvfc_event *evt, *pos;
833
834 ibmvfc_dbg(vhost, "Purging all requests\n");
835 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
836 ibmvfc_fail_request(evt, error_code);
837 }
838
839 /**
840 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
841 * @vhost: struct ibmvfc host to reset
842 **/
843 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
844 {
845 ibmvfc_purge_requests(vhost, DID_ERROR);
846 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
847 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
848 }
849
850 /**
851 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
852 * @vhost: struct ibmvfc host to reset
853 **/
854 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
855 {
856 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
857 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
858 scsi_block_requests(vhost->host);
859 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
860 vhost->job_step = ibmvfc_npiv_logout;
861 wake_up(&vhost->work_wait_q);
862 } else
863 ibmvfc_hard_reset_host(vhost);
864 }
865
866 /**
867 * ibmvfc_reset_host - Reset the connection to the server
868 * @vhost: ibmvfc host struct
869 **/
870 static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
871 {
872 unsigned long flags;
873
874 spin_lock_irqsave(vhost->host->host_lock, flags);
875 __ibmvfc_reset_host(vhost);
876 spin_unlock_irqrestore(vhost->host->host_lock, flags);
877 }
878
879 /**
880 * ibmvfc_retry_host_init - Retry host initialization if allowed
881 * @vhost: ibmvfc host struct
882 *
883 * Returns: 1 if init will be retried / 0 if not
884 *
885 **/
886 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
887 {
888 int retry = 0;
889
890 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
891 vhost->delay_init = 1;
892 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
893 dev_err(vhost->dev,
894 "Host initialization retries exceeded. Taking adapter offline\n");
895 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
896 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
897 __ibmvfc_reset_host(vhost);
898 else {
899 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
900 retry = 1;
901 }
902 }
903
904 wake_up(&vhost->work_wait_q);
905 return retry;
906 }
907
908 /**
909 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
910 * @starget: scsi target struct
911 *
912 * Return value:
913 * ibmvfc_target struct / NULL if not found
914 **/
915 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
916 {
917 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
918 struct ibmvfc_host *vhost = shost_priv(shost);
919 struct ibmvfc_target *tgt;
920
921 list_for_each_entry(tgt, &vhost->targets, queue)
922 if (tgt->target_id == starget->id) {
923 kref_get(&tgt->kref);
924 return tgt;
925 }
926 return NULL;
927 }
928
929 /**
930 * ibmvfc_get_target - Find the specified scsi_target
931 * @starget: scsi target struct
932 *
933 * Return value:
934 * ibmvfc_target struct / NULL if not found
935 **/
936 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
937 {
938 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
939 struct ibmvfc_target *tgt;
940 unsigned long flags;
941
942 spin_lock_irqsave(shost->host_lock, flags);
943 tgt = __ibmvfc_get_target(starget);
944 spin_unlock_irqrestore(shost->host_lock, flags);
945 return tgt;
946 }
947
948 /**
949 * ibmvfc_get_host_speed - Get host port speed
950 * @shost: scsi host struct
951 *
952 * Return value:
953 * none
954 **/
955 static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
956 {
957 struct ibmvfc_host *vhost = shost_priv(shost);
958 unsigned long flags;
959
960 spin_lock_irqsave(shost->host_lock, flags);
961 if (vhost->state == IBMVFC_ACTIVE) {
962 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
963 case 1:
964 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
965 break;
966 case 2:
967 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
968 break;
969 case 4:
970 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
971 break;
972 case 8:
973 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
974 break;
975 case 10:
976 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
977 break;
978 case 16:
979 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
980 break;
981 default:
982 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
983 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
985 break;
986 }
987 } else
988 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
989 spin_unlock_irqrestore(shost->host_lock, flags);
990 }
991
992 /**
993 * ibmvfc_get_host_port_state - Get host port state
994 * @shost: scsi host struct
995 *
996 * Return value:
997 * none
998 **/
999 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1000 {
1001 struct ibmvfc_host *vhost = shost_priv(shost);
1002 unsigned long flags;
1003
1004 spin_lock_irqsave(shost->host_lock, flags);
1005 switch (vhost->state) {
1006 case IBMVFC_INITIALIZING:
1007 case IBMVFC_ACTIVE:
1008 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1009 break;
1010 case IBMVFC_LINK_DOWN:
1011 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1012 break;
1013 case IBMVFC_LINK_DEAD:
1014 case IBMVFC_HOST_OFFLINE:
1015 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1016 break;
1017 case IBMVFC_HALTED:
1018 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1019 break;
1020 case IBMVFC_NO_CRQ:
1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1022 break;
1023 default:
1024 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1025 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1026 break;
1027 }
1028 spin_unlock_irqrestore(shost->host_lock, flags);
1029 }
1030
1031 /**
1032 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1033 * @rport: rport struct
1034 * @timeout: timeout value
1035 *
1036 * Return value:
1037 * none
1038 **/
1039 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1040 {
1041 if (timeout)
1042 rport->dev_loss_tmo = timeout;
1043 else
1044 rport->dev_loss_tmo = 1;
1045 }
1046
1047 /**
1048 * ibmvfc_release_tgt - Free memory allocated for a target
1049 * @kref: kref struct
1050 *
1051 **/
1052 static void ibmvfc_release_tgt(struct kref *kref)
1053 {
1054 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1055 kfree(tgt);
1056 }
1057
1058 /**
1059 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1060 * @starget: scsi target struct
1061 *
1062 * Return value:
1063 * none
1064 **/
1065 static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1066 {
1067 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1068 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1069 if (tgt)
1070 kref_put(&tgt->kref, ibmvfc_release_tgt);
1071 }
1072
1073 /**
1074 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1075 * @starget: scsi target struct
1076 *
1077 * Return value:
1078 * none
1079 **/
1080 static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1081 {
1082 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1083 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1084 if (tgt)
1085 kref_put(&tgt->kref, ibmvfc_release_tgt);
1086 }
1087
1088 /**
1089 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1090 * @starget: scsi target struct
1091 *
1092 * Return value:
1093 * none
1094 **/
1095 static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1096 {
1097 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1098 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1099 if (tgt)
1100 kref_put(&tgt->kref, ibmvfc_release_tgt);
1101 }
1102
1103 /**
1104 * ibmvfc_wait_while_resetting - Wait while the host resets
1105 * @vhost: ibmvfc host struct
1106 *
1107 * Return value:
1108 * 0 on success / other on failure
1109 **/
1110 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1111 {
1112 long timeout = wait_event_timeout(vhost->init_wait_q,
1113 ((vhost->state == IBMVFC_ACTIVE ||
1114 vhost->state == IBMVFC_HOST_OFFLINE ||
1115 vhost->state == IBMVFC_LINK_DEAD) &&
1116 vhost->action == IBMVFC_HOST_ACTION_NONE),
1117 (init_timeout * HZ));
1118
1119 return timeout ? 0 : -EIO;
1120 }
1121
1122 /**
1123 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1124 * @shost: scsi host struct
1125 *
1126 * Return value:
1127 * 0 on success / other on failure
1128 **/
1129 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1130 {
1131 struct ibmvfc_host *vhost = shost_priv(shost);
1132
1133 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1134 ibmvfc_reset_host(vhost);
1135 return ibmvfc_wait_while_resetting(vhost);
1136 }
1137
1138 /**
1139 * ibmvfc_gather_partition_info - Gather info about the LPAR
1140 *
1141 * Return value:
1142 * none
1143 **/
1144 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1145 {
1146 struct device_node *rootdn;
1147 const char *name;
1148 const unsigned int *num;
1149
1150 rootdn = of_find_node_by_path("/");
1151 if (!rootdn)
1152 return;
1153
1154 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1155 if (name)
1156 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1157 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1158 if (num)
1159 vhost->partition_number = *num;
1160 of_node_put(rootdn);
1161 }
1162
1163 /**
1164 * ibmvfc_set_login_info - Setup info for NPIV login
1165 * @vhost: ibmvfc host struct
1166 *
1167 * Return value:
1168 * none
1169 **/
1170 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1171 {
1172 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1173 struct device_node *of_node = vhost->dev->of_node;
1174 const char *location;
1175
1176 memset(login_info, 0, sizeof(*login_info));
1177
1178 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1179 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1180 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1181 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1182 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1183 login_info->vfc_frame_version = cpu_to_be32(1);
1184 login_info->fcp_version = cpu_to_be16(3);
1185 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
1186 if (vhost->client_migrated)
1187 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
1188
1189 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1190 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1191 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1192 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
1193 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1194 strncpy(login_info->device_name,
1195 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1196
1197 location = of_get_property(of_node, "ibm,loc-code", NULL);
1198 location = location ? location : dev_name(vhost->dev);
1199 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1200 }
1201
1202 /**
1203 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1204 * @vhost: ibmvfc host who owns the event pool
1205 *
1206 * Returns zero on success.
1207 **/
1208 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1209 {
1210 int i;
1211 struct ibmvfc_event_pool *pool = &vhost->pool;
1212
1213 ENTER;
1214 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1215 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1216 if (!pool->events)
1217 return -ENOMEM;
1218
1219 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1220 pool->size * sizeof(*pool->iu_storage),
1221 &pool->iu_token, 0);
1222
1223 if (!pool->iu_storage) {
1224 kfree(pool->events);
1225 return -ENOMEM;
1226 }
1227
1228 for (i = 0; i < pool->size; ++i) {
1229 struct ibmvfc_event *evt = &pool->events[i];
1230 atomic_set(&evt->free, 1);
1231 evt->crq.valid = 0x80;
1232 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
1233 evt->xfer_iu = pool->iu_storage + i;
1234 evt->vhost = vhost;
1235 evt->ext_list = NULL;
1236 list_add_tail(&evt->queue, &vhost->free);
1237 }
1238
1239 LEAVE;
1240 return 0;
1241 }
1242
1243 /**
1244 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1245 * @vhost: ibmvfc host who owns the event pool
1246 *
1247 **/
1248 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1249 {
1250 int i;
1251 struct ibmvfc_event_pool *pool = &vhost->pool;
1252
1253 ENTER;
1254 for (i = 0; i < pool->size; ++i) {
1255 list_del(&pool->events[i].queue);
1256 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1257 if (pool->events[i].ext_list)
1258 dma_pool_free(vhost->sg_pool,
1259 pool->events[i].ext_list,
1260 pool->events[i].ext_list_token);
1261 }
1262
1263 kfree(pool->events);
1264 dma_free_coherent(vhost->dev,
1265 pool->size * sizeof(*pool->iu_storage),
1266 pool->iu_storage, pool->iu_token);
1267 LEAVE;
1268 }
1269
1270 /**
1271 * ibmvfc_get_event - Gets the next free event in pool
1272 * @vhost: ibmvfc host struct
1273 *
1274 * Returns a free event from the pool.
1275 **/
1276 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1277 {
1278 struct ibmvfc_event *evt;
1279
1280 BUG_ON(list_empty(&vhost->free));
1281 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1282 atomic_set(&evt->free, 0);
1283 list_del(&evt->queue);
1284 return evt;
1285 }
1286
1287 /**
1288 * ibmvfc_init_event - Initialize fields in an event struct that are always
1289 * required.
1290 * @evt: The event
1291 * @done: Routine to call when the event is responded to
1292 * @format: SRP or MAD format
1293 **/
1294 static void ibmvfc_init_event(struct ibmvfc_event *evt,
1295 void (*done) (struct ibmvfc_event *), u8 format)
1296 {
1297 evt->cmnd = NULL;
1298 evt->sync_iu = NULL;
1299 evt->crq.format = format;
1300 evt->done = done;
1301 evt->eh_comp = NULL;
1302 }
1303
1304 /**
1305 * ibmvfc_map_sg_list - Initialize scatterlist
1306 * @scmd: scsi command struct
1307 * @nseg: number of scatterlist segments
1308 * @md: memory descriptor list to initialize
1309 **/
1310 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1311 struct srp_direct_buf *md)
1312 {
1313 int i;
1314 struct scatterlist *sg;
1315
1316 scsi_for_each_sg(scmd, sg, nseg, i) {
1317 md[i].va = cpu_to_be64(sg_dma_address(sg));
1318 md[i].len = cpu_to_be32(sg_dma_len(sg));
1319 md[i].key = 0;
1320 }
1321 }
1322
1323 /**
1324 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1325 * @scmd: Scsi_Cmnd with the scatterlist
1326 * @evt: ibmvfc event struct
1327 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1328 * @dev: device for which to map dma memory
1329 *
1330 * Returns:
1331 * 0 on success / non-zero on failure
1332 **/
1333 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1334 struct ibmvfc_event *evt,
1335 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1336 {
1337
1338 int sg_mapped;
1339 struct srp_direct_buf *data = &vfc_cmd->ioba;
1340 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1341
1342 if (cls3_error)
1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1344
1345 sg_mapped = scsi_dma_map(scmd);
1346 if (!sg_mapped) {
1347 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
1348 return 0;
1349 } else if (unlikely(sg_mapped < 0)) {
1350 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1351 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1352 return sg_mapped;
1353 }
1354
1355 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1356 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
1357 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1358 } else {
1359 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
1360 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1361 }
1362
1363 if (sg_mapped == 1) {
1364 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1365 return 0;
1366 }
1367
1368 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
1369
1370 if (!evt->ext_list) {
1371 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1372 &evt->ext_list_token);
1373
1374 if (!evt->ext_list) {
1375 scsi_dma_unmap(scmd);
1376 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1377 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1378 return -ENOMEM;
1379 }
1380 }
1381
1382 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1383
1384 data->va = cpu_to_be64(evt->ext_list_token);
1385 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
1386 data->key = 0;
1387 return 0;
1388 }
1389
1390 /**
1391 * ibmvfc_timeout - Internal command timeout handler
1392 * @evt: struct ibmvfc_event that timed out
1393 *
1394 * Called when an internally generated command times out
1395 **/
1396 static void ibmvfc_timeout(struct ibmvfc_event *evt)
1397 {
1398 struct ibmvfc_host *vhost = evt->vhost;
1399 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1400 ibmvfc_reset_host(vhost);
1401 }
1402
1403 /**
1404 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1405 * @evt: event to be sent
1406 * @vhost: ibmvfc host struct
1407 * @timeout: timeout in seconds - 0 means do not time command
1408 *
1409 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1410 **/
1411 static int ibmvfc_send_event(struct ibmvfc_event *evt,
1412 struct ibmvfc_host *vhost, unsigned long timeout)
1413 {
1414 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
1415 int rc;
1416
1417 /* Copy the IU into the transfer area */
1418 *evt->xfer_iu = evt->iu;
1419 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1420 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
1421 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1422 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
1423 else
1424 BUG();
1425
1426 list_add_tail(&evt->queue, &vhost->sent);
1427 init_timer(&evt->timer);
1428
1429 if (timeout) {
1430 evt->timer.data = (unsigned long) evt;
1431 evt->timer.expires = jiffies + (timeout * HZ);
1432 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1433 add_timer(&evt->timer);
1434 }
1435
1436 mb();
1437
1438 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1439 be64_to_cpu(crq_as_u64[1])))) {
1440 list_del(&evt->queue);
1441 del_timer(&evt->timer);
1442
1443 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1444 * Firmware will send a CRQ with a transport event (0xFF) to
1445 * tell this client what has happened to the transport. This
1446 * will be handled in ibmvfc_handle_crq()
1447 */
1448 if (rc == H_CLOSED) {
1449 if (printk_ratelimit())
1450 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1451 if (evt->cmnd)
1452 scsi_dma_unmap(evt->cmnd);
1453 ibmvfc_free_event(evt);
1454 return SCSI_MLQUEUE_HOST_BUSY;
1455 }
1456
1457 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1458 if (evt->cmnd) {
1459 evt->cmnd->result = DID_ERROR << 16;
1460 evt->done = ibmvfc_scsi_eh_done;
1461 } else
1462 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
1463
1464 evt->done(evt);
1465 } else
1466 ibmvfc_trc_start(evt);
1467
1468 return 0;
1469 }
1470
1471 /**
1472 * ibmvfc_log_error - Log an error for the failed command if appropriate
1473 * @evt: ibmvfc event to log
1474 *
1475 **/
1476 static void ibmvfc_log_error(struct ibmvfc_event *evt)
1477 {
1478 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1479 struct ibmvfc_host *vhost = evt->vhost;
1480 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1481 struct scsi_cmnd *cmnd = evt->cmnd;
1482 const char *err = unknown_error;
1483 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
1484 int logerr = 0;
1485 int rsp_code = 0;
1486
1487 if (index >= 0) {
1488 logerr = cmd_status[index].log;
1489 err = cmd_status[index].name;
1490 }
1491
1492 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1493 return;
1494
1495 if (rsp->flags & FCP_RSP_LEN_VALID)
1496 rsp_code = rsp->data.info.rsp_code;
1497
1498 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1499 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1500 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1501 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1502 }
1503
1504 /**
1505 * ibmvfc_relogin - Log back into the specified device
1506 * @sdev: scsi device struct
1507 *
1508 **/
1509 static void ibmvfc_relogin(struct scsi_device *sdev)
1510 {
1511 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1512 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1513 struct ibmvfc_target *tgt;
1514
1515 list_for_each_entry(tgt, &vhost->targets, queue) {
1516 if (rport == tgt->rport) {
1517 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1518 break;
1519 }
1520 }
1521
1522 ibmvfc_reinit_host(vhost);
1523 }
1524
1525 /**
1526 * ibmvfc_scsi_done - Handle responses from commands
1527 * @evt: ibmvfc event to be handled
1528 *
1529 * Used as a callback when sending scsi cmds.
1530 **/
1531 static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1532 {
1533 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1534 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1535 struct scsi_cmnd *cmnd = evt->cmnd;
1536 u32 rsp_len = 0;
1537 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
1538
1539 if (cmnd) {
1540 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1541 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
1542 else if (rsp->flags & FCP_RESID_UNDER)
1543 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
1544 else
1545 scsi_set_resid(cmnd, 0);
1546
1547 if (vfc_cmd->status) {
1548 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1549
1550 if (rsp->flags & FCP_RSP_LEN_VALID)
1551 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
1552 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1553 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1554 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1555 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1556 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1557 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
1558 ibmvfc_relogin(cmnd->device);
1559
1560 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1561 cmnd->result = (DID_ERROR << 16);
1562
1563 ibmvfc_log_error(evt);
1564 }
1565
1566 if (!cmnd->result &&
1567 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1568 cmnd->result = (DID_ERROR << 16);
1569
1570 scsi_dma_unmap(cmnd);
1571 cmnd->scsi_done(cmnd);
1572 }
1573
1574 if (evt->eh_comp)
1575 complete(evt->eh_comp);
1576
1577 ibmvfc_free_event(evt);
1578 }
1579
1580 /**
1581 * ibmvfc_host_chkready - Check if the host can accept commands
1582 * @vhost: struct ibmvfc host
1583 *
1584 * Returns:
1585 * 1 if host can accept command / 0 if not
1586 **/
1587 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1588 {
1589 int result = 0;
1590
1591 switch (vhost->state) {
1592 case IBMVFC_LINK_DEAD:
1593 case IBMVFC_HOST_OFFLINE:
1594 result = DID_NO_CONNECT << 16;
1595 break;
1596 case IBMVFC_NO_CRQ:
1597 case IBMVFC_INITIALIZING:
1598 case IBMVFC_HALTED:
1599 case IBMVFC_LINK_DOWN:
1600 result = DID_REQUEUE << 16;
1601 break;
1602 case IBMVFC_ACTIVE:
1603 result = 0;
1604 break;
1605 };
1606
1607 return result;
1608 }
1609
1610 /**
1611 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1612 * @cmnd: struct scsi_cmnd to be executed
1613 * @done: Callback function to be called when cmnd is completed
1614 *
1615 * Returns:
1616 * 0 on success / other on failure
1617 **/
1618 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
1619 void (*done) (struct scsi_cmnd *))
1620 {
1621 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1622 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1623 struct ibmvfc_cmd *vfc_cmd;
1624 struct ibmvfc_event *evt;
1625 int rc;
1626
1627 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1628 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1629 cmnd->result = rc;
1630 done(cmnd);
1631 return 0;
1632 }
1633
1634 cmnd->result = (DID_OK << 16);
1635 evt = ibmvfc_get_event(vhost);
1636 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1637 evt->cmnd = cmnd;
1638 cmnd->scsi_done = done;
1639 vfc_cmd = &evt->iu.cmd;
1640 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1641 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1642 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1643 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1644 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1645 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1646 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1647 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1648 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1649 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1650 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1651
1652 if (cmnd->flags & SCMD_TAGGED) {
1653 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1654 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1655 }
1656
1657 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1658 return ibmvfc_send_event(evt, vhost, 0);
1659
1660 ibmvfc_free_event(evt);
1661 if (rc == -ENOMEM)
1662 return SCSI_MLQUEUE_HOST_BUSY;
1663
1664 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1665 scmd_printk(KERN_ERR, cmnd,
1666 "Failed to map DMA buffer for command. rc=%d\n", rc);
1667
1668 cmnd->result = DID_ERROR << 16;
1669 done(cmnd);
1670 return 0;
1671 }
1672
1673 static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1674
1675 /**
1676 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1677 * @evt: ibmvfc event struct
1678 *
1679 **/
1680 static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1681 {
1682 /* copy the response back */
1683 if (evt->sync_iu)
1684 *evt->sync_iu = *evt->xfer_iu;
1685
1686 complete(&evt->comp);
1687 }
1688
1689 /**
1690 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1691 * @evt: struct ibmvfc_event
1692 *
1693 **/
1694 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1695 {
1696 struct ibmvfc_host *vhost = evt->vhost;
1697
1698 ibmvfc_free_event(evt);
1699 vhost->aborting_passthru = 0;
1700 dev_info(vhost->dev, "Passthru command cancelled\n");
1701 }
1702
1703 /**
1704 * ibmvfc_bsg_timeout - Handle a BSG timeout
1705 * @job: struct bsg_job that timed out
1706 *
1707 * Returns:
1708 * 0 on success / other on failure
1709 **/
1710 static int ibmvfc_bsg_timeout(struct bsg_job *job)
1711 {
1712 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1713 unsigned long port_id = (unsigned long)job->dd_data;
1714 struct ibmvfc_event *evt;
1715 struct ibmvfc_tmf *tmf;
1716 unsigned long flags;
1717 int rc;
1718
1719 ENTER;
1720 spin_lock_irqsave(vhost->host->host_lock, flags);
1721 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1722 __ibmvfc_reset_host(vhost);
1723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1724 return 0;
1725 }
1726
1727 vhost->aborting_passthru = 1;
1728 evt = ibmvfc_get_event(vhost);
1729 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1730
1731 tmf = &evt->iu.tmf;
1732 memset(tmf, 0, sizeof(*tmf));
1733 tmf->common.version = cpu_to_be32(1);
1734 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1735 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1736 tmf->scsi_id = cpu_to_be64(port_id);
1737 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1738 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
1739 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1740
1741 if (rc != 0) {
1742 vhost->aborting_passthru = 0;
1743 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1744 rc = -EIO;
1745 } else
1746 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1747 port_id);
1748
1749 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1750
1751 LEAVE;
1752 return rc;
1753 }
1754
1755 /**
1756 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1757 * @vhost: struct ibmvfc_host to send command
1758 * @port_id: port ID to send command
1759 *
1760 * Returns:
1761 * 0 on success / other on failure
1762 **/
1763 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1764 {
1765 struct ibmvfc_port_login *plogi;
1766 struct ibmvfc_target *tgt;
1767 struct ibmvfc_event *evt;
1768 union ibmvfc_iu rsp_iu;
1769 unsigned long flags;
1770 int rc = 0, issue_login = 1;
1771
1772 ENTER;
1773 spin_lock_irqsave(vhost->host->host_lock, flags);
1774 list_for_each_entry(tgt, &vhost->targets, queue) {
1775 if (tgt->scsi_id == port_id) {
1776 issue_login = 0;
1777 break;
1778 }
1779 }
1780
1781 if (!issue_login)
1782 goto unlock_out;
1783 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1784 goto unlock_out;
1785
1786 evt = ibmvfc_get_event(vhost);
1787 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1788 plogi = &evt->iu.plogi;
1789 memset(plogi, 0, sizeof(*plogi));
1790 plogi->common.version = cpu_to_be32(1);
1791 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1792 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1793 plogi->scsi_id = cpu_to_be64(port_id);
1794 evt->sync_iu = &rsp_iu;
1795 init_completion(&evt->comp);
1796
1797 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1798 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1799
1800 if (rc)
1801 return -EIO;
1802
1803 wait_for_completion(&evt->comp);
1804
1805 if (rsp_iu.plogi.common.status)
1806 rc = -EIO;
1807
1808 spin_lock_irqsave(vhost->host->host_lock, flags);
1809 ibmvfc_free_event(evt);
1810 unlock_out:
1811 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1812 LEAVE;
1813 return rc;
1814 }
1815
1816 /**
1817 * ibmvfc_bsg_request - Handle a BSG request
1818 * @job: struct bsg_job to be executed
1819 *
1820 * Returns:
1821 * 0 on success / other on failure
1822 **/
1823 static int ibmvfc_bsg_request(struct bsg_job *job)
1824 {
1825 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1826 struct fc_rport *rport = fc_bsg_to_rport(job);
1827 struct ibmvfc_passthru_mad *mad;
1828 struct ibmvfc_event *evt;
1829 union ibmvfc_iu rsp_iu;
1830 unsigned long flags, port_id = -1;
1831 struct fc_bsg_request *bsg_request = job->request;
1832 struct fc_bsg_reply *bsg_reply = job->reply;
1833 unsigned int code = bsg_request->msgcode;
1834 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1835 u32 fc_flags, rsp_len;
1836
1837 ENTER;
1838 bsg_reply->reply_payload_rcv_len = 0;
1839 if (rport)
1840 port_id = rport->port_id;
1841
1842 switch (code) {
1843 case FC_BSG_HST_ELS_NOLOGIN:
1844 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
1845 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
1846 bsg_request->rqst_data.h_els.port_id[2];
1847 case FC_BSG_RPT_ELS:
1848 fc_flags = IBMVFC_FC_ELS;
1849 break;
1850 case FC_BSG_HST_CT:
1851 issue_login = 1;
1852 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
1853 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
1854 bsg_request->rqst_data.h_ct.port_id[2];
1855 case FC_BSG_RPT_CT:
1856 fc_flags = IBMVFC_FC_CT_IU;
1857 break;
1858 default:
1859 return -ENOTSUPP;
1860 };
1861
1862 if (port_id == -1)
1863 return -EINVAL;
1864 if (!mutex_trylock(&vhost->passthru_mutex))
1865 return -EBUSY;
1866
1867 job->dd_data = (void *)port_id;
1868 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1869 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1870
1871 if (!req_seg) {
1872 mutex_unlock(&vhost->passthru_mutex);
1873 return -ENOMEM;
1874 }
1875
1876 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1877 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1878
1879 if (!rsp_seg) {
1880 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1881 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1882 mutex_unlock(&vhost->passthru_mutex);
1883 return -ENOMEM;
1884 }
1885
1886 if (req_seg > 1 || rsp_seg > 1) {
1887 rc = -EINVAL;
1888 goto out;
1889 }
1890
1891 if (issue_login)
1892 rc = ibmvfc_bsg_plogi(vhost, port_id);
1893
1894 spin_lock_irqsave(vhost->host->host_lock, flags);
1895
1896 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1897 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1898 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1899 goto out;
1900 }
1901
1902 evt = ibmvfc_get_event(vhost);
1903 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1904 mad = &evt->iu.passthru;
1905
1906 memset(mad, 0, sizeof(*mad));
1907 mad->common.version = cpu_to_be32(1);
1908 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1909 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1910
1911 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1912 offsetof(struct ibmvfc_passthru_mad, iu));
1913 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1914
1915 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1916 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1917 mad->iu.flags = cpu_to_be32(fc_flags);
1918 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1919
1920 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1921 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1922 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1923 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1924 mad->iu.scsi_id = cpu_to_be64(port_id);
1925 mad->iu.tag = cpu_to_be64((u64)evt);
1926 rsp_len = be32_to_cpu(mad->iu.rsp.len);
1927
1928 evt->sync_iu = &rsp_iu;
1929 init_completion(&evt->comp);
1930 rc = ibmvfc_send_event(evt, vhost, 0);
1931 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1932
1933 if (rc) {
1934 rc = -EIO;
1935 goto out;
1936 }
1937
1938 wait_for_completion(&evt->comp);
1939
1940 if (rsp_iu.passthru.common.status)
1941 rc = -EIO;
1942 else
1943 bsg_reply->reply_payload_rcv_len = rsp_len;
1944
1945 spin_lock_irqsave(vhost->host->host_lock, flags);
1946 ibmvfc_free_event(evt);
1947 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1948 bsg_reply->result = rc;
1949 bsg_job_done(job, bsg_reply->result,
1950 bsg_reply->reply_payload_rcv_len);
1951 rc = 0;
1952 out:
1953 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1954 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1955 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1956 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1957 mutex_unlock(&vhost->passthru_mutex);
1958 LEAVE;
1959 return rc;
1960 }
1961
1962 /**
1963 * ibmvfc_reset_device - Reset the device with the specified reset type
1964 * @sdev: scsi device to reset
1965 * @type: reset type
1966 * @desc: reset type description for log messages
1967 *
1968 * Returns:
1969 * 0 on success / other on failure
1970 **/
1971 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1972 {
1973 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1974 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1975 struct ibmvfc_cmd *tmf;
1976 struct ibmvfc_event *evt = NULL;
1977 union ibmvfc_iu rsp_iu;
1978 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1979 int rsp_rc = -EBUSY;
1980 unsigned long flags;
1981 int rsp_code = 0;
1982
1983 spin_lock_irqsave(vhost->host->host_lock, flags);
1984 if (vhost->state == IBMVFC_ACTIVE) {
1985 evt = ibmvfc_get_event(vhost);
1986 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1987
1988 tmf = &evt->iu.cmd;
1989 memset(tmf, 0, sizeof(*tmf));
1990 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1991 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1992 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1993 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1994 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1995 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1996 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
1997 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1998 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
1999 tmf->iu.tmf_flags = type;
2000 evt->sync_iu = &rsp_iu;
2001
2002 init_completion(&evt->comp);
2003 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2004 }
2005 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2006
2007 if (rsp_rc != 0) {
2008 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2009 desc, rsp_rc);
2010 return -EIO;
2011 }
2012
2013 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2014 wait_for_completion(&evt->comp);
2015
2016 if (rsp_iu.cmd.status)
2017 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2018
2019 if (rsp_code) {
2020 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2021 rsp_code = fc_rsp->data.info.rsp_code;
2022
2023 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2024 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2025 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2026 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2027 fc_rsp->scsi_status);
2028 rsp_rc = -EIO;
2029 } else
2030 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2031
2032 spin_lock_irqsave(vhost->host->host_lock, flags);
2033 ibmvfc_free_event(evt);
2034 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2035 return rsp_rc;
2036 }
2037
2038 /**
2039 * ibmvfc_match_rport - Match function for specified remote port
2040 * @evt: ibmvfc event struct
2041 * @device: device to match (rport)
2042 *
2043 * Returns:
2044 * 1 if event matches rport / 0 if event does not match rport
2045 **/
2046 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
2047 {
2048 struct fc_rport *cmd_rport;
2049
2050 if (evt->cmnd) {
2051 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2052 if (cmd_rport == rport)
2053 return 1;
2054 }
2055 return 0;
2056 }
2057
2058 /**
2059 * ibmvfc_match_target - Match function for specified target
2060 * @evt: ibmvfc event struct
2061 * @device: device to match (starget)
2062 *
2063 * Returns:
2064 * 1 if event matches starget / 0 if event does not match starget
2065 **/
2066 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2067 {
2068 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2069 return 1;
2070 return 0;
2071 }
2072
2073 /**
2074 * ibmvfc_match_lun - Match function for specified LUN
2075 * @evt: ibmvfc event struct
2076 * @device: device to match (sdev)
2077 *
2078 * Returns:
2079 * 1 if event matches sdev / 0 if event does not match sdev
2080 **/
2081 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2082 {
2083 if (evt->cmnd && evt->cmnd->device == device)
2084 return 1;
2085 return 0;
2086 }
2087
2088 /**
2089 * ibmvfc_wait_for_ops - Wait for ops to complete
2090 * @vhost: ibmvfc host struct
2091 * @device: device to match (starget or sdev)
2092 * @match: match function
2093 *
2094 * Returns:
2095 * SUCCESS / FAILED
2096 **/
2097 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2098 int (*match) (struct ibmvfc_event *, void *))
2099 {
2100 struct ibmvfc_event *evt;
2101 DECLARE_COMPLETION_ONSTACK(comp);
2102 int wait;
2103 unsigned long flags;
2104 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2105
2106 ENTER;
2107 do {
2108 wait = 0;
2109 spin_lock_irqsave(vhost->host->host_lock, flags);
2110 list_for_each_entry(evt, &vhost->sent, queue) {
2111 if (match(evt, device)) {
2112 evt->eh_comp = &comp;
2113 wait++;
2114 }
2115 }
2116 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2117
2118 if (wait) {
2119 timeout = wait_for_completion_timeout(&comp, timeout);
2120
2121 if (!timeout) {
2122 wait = 0;
2123 spin_lock_irqsave(vhost->host->host_lock, flags);
2124 list_for_each_entry(evt, &vhost->sent, queue) {
2125 if (match(evt, device)) {
2126 evt->eh_comp = NULL;
2127 wait++;
2128 }
2129 }
2130 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2131 if (wait)
2132 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2133 LEAVE;
2134 return wait ? FAILED : SUCCESS;
2135 }
2136 }
2137 } while (wait);
2138
2139 LEAVE;
2140 return SUCCESS;
2141 }
2142
2143 /**
2144 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2145 * @sdev: scsi device to cancel commands
2146 * @type: type of error recovery being performed
2147 *
2148 * This sends a cancel to the VIOS for the specified device. This does
2149 * NOT send any abort to the actual device. That must be done separately.
2150 *
2151 * Returns:
2152 * 0 on success / other on failure
2153 **/
2154 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2155 {
2156 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2157 struct scsi_target *starget = scsi_target(sdev);
2158 struct fc_rport *rport = starget_to_rport(starget);
2159 struct ibmvfc_tmf *tmf;
2160 struct ibmvfc_event *evt, *found_evt;
2161 union ibmvfc_iu rsp;
2162 int rsp_rc = -EBUSY;
2163 unsigned long flags;
2164 u16 status;
2165
2166 ENTER;
2167 spin_lock_irqsave(vhost->host->host_lock, flags);
2168 found_evt = NULL;
2169 list_for_each_entry(evt, &vhost->sent, queue) {
2170 if (evt->cmnd && evt->cmnd->device == sdev) {
2171 found_evt = evt;
2172 break;
2173 }
2174 }
2175
2176 if (!found_evt) {
2177 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2178 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2179 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2180 return 0;
2181 }
2182
2183 if (vhost->logged_in) {
2184 evt = ibmvfc_get_event(vhost);
2185 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2186
2187 tmf = &evt->iu.tmf;
2188 memset(tmf, 0, sizeof(*tmf));
2189 tmf->common.version = cpu_to_be32(1);
2190 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2191 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2192 tmf->scsi_id = cpu_to_be64(rport->port_id);
2193 int_to_scsilun(sdev->lun, &tmf->lun);
2194 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
2195 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
2196 if (vhost->state == IBMVFC_ACTIVE)
2197 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
2198 else
2199 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2200 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2201 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
2202
2203 evt->sync_iu = &rsp;
2204 init_completion(&evt->comp);
2205 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2206 }
2207
2208 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2209
2210 if (rsp_rc != 0) {
2211 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2212 /* If failure is received, the host adapter is most likely going
2213 through reset, return success so the caller will wait for the command
2214 being cancelled to get returned */
2215 return 0;
2216 }
2217
2218 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2219
2220 wait_for_completion(&evt->comp);
2221 status = be16_to_cpu(rsp.mad_common.status);
2222 spin_lock_irqsave(vhost->host->host_lock, flags);
2223 ibmvfc_free_event(evt);
2224 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2225
2226 if (status != IBMVFC_MAD_SUCCESS) {
2227 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2228 switch (status) {
2229 case IBMVFC_MAD_DRIVER_FAILED:
2230 case IBMVFC_MAD_CRQ_ERROR:
2231 /* Host adapter most likely going through reset, return success to
2232 the caller will wait for the command being cancelled to get returned */
2233 return 0;
2234 default:
2235 return -EIO;
2236 };
2237 }
2238
2239 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2240 return 0;
2241 }
2242
2243 /**
2244 * ibmvfc_match_key - Match function for specified cancel key
2245 * @evt: ibmvfc event struct
2246 * @key: cancel key to match
2247 *
2248 * Returns:
2249 * 1 if event matches key / 0 if event does not match key
2250 **/
2251 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
2252 {
2253 unsigned long cancel_key = (unsigned long)key;
2254
2255 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
2256 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
2257 return 1;
2258 return 0;
2259 }
2260
2261 /**
2262 * ibmvfc_match_evt - Match function for specified event
2263 * @evt: ibmvfc event struct
2264 * @match: event to match
2265 *
2266 * Returns:
2267 * 1 if event matches key / 0 if event does not match key
2268 **/
2269 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2270 {
2271 if (evt == match)
2272 return 1;
2273 return 0;
2274 }
2275
2276 /**
2277 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2278 * @sdev: scsi device to abort commands
2279 *
2280 * This sends an Abort Task Set to the VIOS for the specified device. This does
2281 * NOT send any cancel to the VIOS. That must be done separately.
2282 *
2283 * Returns:
2284 * 0 on success / other on failure
2285 **/
2286 static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2287 {
2288 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2289 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2290 struct ibmvfc_cmd *tmf;
2291 struct ibmvfc_event *evt, *found_evt;
2292 union ibmvfc_iu rsp_iu;
2293 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2294 int rc, rsp_rc = -EBUSY;
2295 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2296 int rsp_code = 0;
2297
2298 spin_lock_irqsave(vhost->host->host_lock, flags);
2299 found_evt = NULL;
2300 list_for_each_entry(evt, &vhost->sent, queue) {
2301 if (evt->cmnd && evt->cmnd->device == sdev) {
2302 found_evt = evt;
2303 break;
2304 }
2305 }
2306
2307 if (!found_evt) {
2308 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2309 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2310 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2311 return 0;
2312 }
2313
2314 if (vhost->state == IBMVFC_ACTIVE) {
2315 evt = ibmvfc_get_event(vhost);
2316 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2317
2318 tmf = &evt->iu.cmd;
2319 memset(tmf, 0, sizeof(*tmf));
2320 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2321 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2322 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2323 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2324 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2325 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2326 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
2327 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2328 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2329 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2330 evt->sync_iu = &rsp_iu;
2331
2332 init_completion(&evt->comp);
2333 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2334 }
2335
2336 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2337
2338 if (rsp_rc != 0) {
2339 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2340 return -EIO;
2341 }
2342
2343 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2344 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2345
2346 if (!timeout) {
2347 rc = ibmvfc_cancel_all(sdev, 0);
2348 if (!rc) {
2349 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2350 if (rc == SUCCESS)
2351 rc = 0;
2352 }
2353
2354 if (rc) {
2355 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2356 ibmvfc_reset_host(vhost);
2357 rsp_rc = -EIO;
2358 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2359
2360 if (rc == SUCCESS)
2361 rsp_rc = 0;
2362
2363 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2364 if (rc != SUCCESS) {
2365 spin_lock_irqsave(vhost->host->host_lock, flags);
2366 ibmvfc_hard_reset_host(vhost);
2367 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2368 rsp_rc = 0;
2369 }
2370
2371 goto out;
2372 }
2373 }
2374
2375 if (rsp_iu.cmd.status)
2376 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2377
2378 if (rsp_code) {
2379 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2380 rsp_code = fc_rsp->data.info.rsp_code;
2381
2382 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2383 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2384 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2385 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2386 fc_rsp->scsi_status);
2387 rsp_rc = -EIO;
2388 } else
2389 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2390
2391 out:
2392 spin_lock_irqsave(vhost->host->host_lock, flags);
2393 ibmvfc_free_event(evt);
2394 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2395 return rsp_rc;
2396 }
2397
2398 /**
2399 * ibmvfc_eh_abort_handler - Abort a command
2400 * @cmd: scsi command to abort
2401 *
2402 * Returns:
2403 * SUCCESS / FAST_IO_FAIL / FAILED
2404 **/
2405 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2406 {
2407 struct scsi_device *sdev = cmd->device;
2408 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2409 int cancel_rc, block_rc;
2410 int rc = FAILED;
2411
2412 ENTER;
2413 block_rc = fc_block_scsi_eh(cmd);
2414 ibmvfc_wait_while_resetting(vhost);
2415 if (block_rc != FAST_IO_FAIL) {
2416 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2417 ibmvfc_abort_task_set(sdev);
2418 } else
2419 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2420
2421 if (!cancel_rc)
2422 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2423
2424 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2425 rc = FAST_IO_FAIL;
2426
2427 LEAVE;
2428 return rc;
2429 }
2430
2431 /**
2432 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2433 * @cmd: scsi command struct
2434 *
2435 * Returns:
2436 * SUCCESS / FAST_IO_FAIL / FAILED
2437 **/
2438 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2439 {
2440 struct scsi_device *sdev = cmd->device;
2441 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2442 int cancel_rc, block_rc, reset_rc = 0;
2443 int rc = FAILED;
2444
2445 ENTER;
2446 block_rc = fc_block_scsi_eh(cmd);
2447 ibmvfc_wait_while_resetting(vhost);
2448 if (block_rc != FAST_IO_FAIL) {
2449 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2450 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2451 } else
2452 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2453
2454 if (!cancel_rc && !reset_rc)
2455 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2456
2457 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2458 rc = FAST_IO_FAIL;
2459
2460 LEAVE;
2461 return rc;
2462 }
2463
2464 /**
2465 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2466 * @sdev: scsi device struct
2467 * @data: return code
2468 *
2469 **/
2470 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2471 {
2472 unsigned long *rc = data;
2473 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2474 }
2475
2476 /**
2477 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2478 * @sdev: scsi device struct
2479 * @data: return code
2480 *
2481 **/
2482 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2483 {
2484 unsigned long *rc = data;
2485 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2486 }
2487
2488 /**
2489 * ibmvfc_eh_target_reset_handler - Reset the target
2490 * @cmd: scsi command struct
2491 *
2492 * Returns:
2493 * SUCCESS / FAST_IO_FAIL / FAILED
2494 **/
2495 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2496 {
2497 struct scsi_device *sdev = cmd->device;
2498 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2499 struct scsi_target *starget = scsi_target(sdev);
2500 int block_rc;
2501 int reset_rc = 0;
2502 int rc = FAILED;
2503 unsigned long cancel_rc = 0;
2504
2505 ENTER;
2506 block_rc = fc_block_scsi_eh(cmd);
2507 ibmvfc_wait_while_resetting(vhost);
2508 if (block_rc != FAST_IO_FAIL) {
2509 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2510 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2511 } else
2512 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
2513
2514 if (!cancel_rc && !reset_rc)
2515 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2516
2517 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2518 rc = FAST_IO_FAIL;
2519
2520 LEAVE;
2521 return rc;
2522 }
2523
2524 /**
2525 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2526 * @cmd: struct scsi_cmnd having problems
2527 *
2528 **/
2529 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2530 {
2531 int rc, block_rc;
2532 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2533
2534 block_rc = fc_block_scsi_eh(cmd);
2535 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2536 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2537
2538 if (block_rc == FAST_IO_FAIL)
2539 return FAST_IO_FAIL;
2540
2541 return rc ? FAILED : SUCCESS;
2542 }
2543
2544 /**
2545 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2546 * @rport: rport struct
2547 *
2548 * Return value:
2549 * none
2550 **/
2551 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2552 {
2553 struct Scsi_Host *shost = rport_to_shost(rport);
2554 struct ibmvfc_host *vhost = shost_priv(shost);
2555 struct fc_rport *dev_rport;
2556 struct scsi_device *sdev;
2557 unsigned long rc;
2558
2559 ENTER;
2560 shost_for_each_device(sdev, shost) {
2561 dev_rport = starget_to_rport(scsi_target(sdev));
2562 if (dev_rport != rport)
2563 continue;
2564 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2565 }
2566
2567 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
2568
2569 if (rc == FAILED)
2570 ibmvfc_issue_fc_host_lip(shost);
2571 LEAVE;
2572 }
2573
2574 static const struct ibmvfc_async_desc ae_desc [] = {
2575 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2576 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2577 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2578 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2579 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2580 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2581 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2582 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2583 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2584 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2585 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2586 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2587 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
2588 };
2589
2590 static const struct ibmvfc_async_desc unknown_ae = {
2591 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
2592 };
2593
2594 /**
2595 * ibmvfc_get_ae_desc - Get text description for async event
2596 * @ae: async event
2597 *
2598 **/
2599 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
2600 {
2601 int i;
2602
2603 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2604 if (ae_desc[i].ae == ae)
2605 return &ae_desc[i];
2606
2607 return &unknown_ae;
2608 }
2609
2610 static const struct {
2611 enum ibmvfc_ae_link_state state;
2612 const char *desc;
2613 } link_desc [] = {
2614 { IBMVFC_AE_LS_LINK_UP, " link up" },
2615 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2616 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2617 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2618 };
2619
2620 /**
2621 * ibmvfc_get_link_state - Get text description for link state
2622 * @state: link state
2623 *
2624 **/
2625 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2626 {
2627 int i;
2628
2629 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2630 if (link_desc[i].state == state)
2631 return link_desc[i].desc;
2632
2633 return "";
2634 }
2635
2636 /**
2637 * ibmvfc_handle_async - Handle an async event from the adapter
2638 * @crq: crq to process
2639 * @vhost: ibmvfc host struct
2640 *
2641 **/
2642 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2643 struct ibmvfc_host *vhost)
2644 {
2645 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
2646 struct ibmvfc_target *tgt;
2647
2648 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
2649 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2650 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
2651 ibmvfc_get_link_state(crq->link_state));
2652
2653 switch (be64_to_cpu(crq->event)) {
2654 case IBMVFC_AE_RESUME:
2655 switch (crq->link_state) {
2656 case IBMVFC_AE_LS_LINK_DOWN:
2657 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2658 break;
2659 case IBMVFC_AE_LS_LINK_DEAD:
2660 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2661 break;
2662 case IBMVFC_AE_LS_LINK_UP:
2663 case IBMVFC_AE_LS_LINK_BOUNCED:
2664 default:
2665 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2666 vhost->delay_init = 1;
2667 __ibmvfc_reset_host(vhost);
2668 break;
2669 };
2670
2671 break;
2672 case IBMVFC_AE_LINK_UP:
2673 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2674 vhost->delay_init = 1;
2675 __ibmvfc_reset_host(vhost);
2676 break;
2677 case IBMVFC_AE_SCN_FABRIC:
2678 case IBMVFC_AE_SCN_DOMAIN:
2679 vhost->events_to_log |= IBMVFC_AE_RSCN;
2680 if (vhost->state < IBMVFC_HALTED) {
2681 vhost->delay_init = 1;
2682 __ibmvfc_reset_host(vhost);
2683 }
2684 break;
2685 case IBMVFC_AE_SCN_NPORT:
2686 case IBMVFC_AE_SCN_GROUP:
2687 vhost->events_to_log |= IBMVFC_AE_RSCN;
2688 ibmvfc_reinit_host(vhost);
2689 break;
2690 case IBMVFC_AE_ELS_LOGO:
2691 case IBMVFC_AE_ELS_PRLO:
2692 case IBMVFC_AE_ELS_PLOGI:
2693 list_for_each_entry(tgt, &vhost->targets, queue) {
2694 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2695 break;
2696 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
2697 continue;
2698 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
2699 continue;
2700 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
2701 continue;
2702 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
2703 tgt->logo_rcvd = 1;
2704 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
2705 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2706 ibmvfc_reinit_host(vhost);
2707 }
2708 }
2709 break;
2710 case IBMVFC_AE_LINK_DOWN:
2711 case IBMVFC_AE_ADAPTER_FAILED:
2712 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2713 break;
2714 case IBMVFC_AE_LINK_DEAD:
2715 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2716 break;
2717 case IBMVFC_AE_HALT:
2718 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2719 break;
2720 default:
2721 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
2722 break;
2723 };
2724 }
2725
2726 /**
2727 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2728 * @crq: Command/Response queue
2729 * @vhost: ibmvfc host struct
2730 *
2731 **/
2732 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2733 {
2734 long rc;
2735 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
2736
2737 switch (crq->valid) {
2738 case IBMVFC_CRQ_INIT_RSP:
2739 switch (crq->format) {
2740 case IBMVFC_CRQ_INIT:
2741 dev_info(vhost->dev, "Partner initialized\n");
2742 /* Send back a response */
2743 rc = ibmvfc_send_crq_init_complete(vhost);
2744 if (rc == 0)
2745 ibmvfc_init_host(vhost);
2746 else
2747 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2748 break;
2749 case IBMVFC_CRQ_INIT_COMPLETE:
2750 dev_info(vhost->dev, "Partner initialization complete\n");
2751 ibmvfc_init_host(vhost);
2752 break;
2753 default:
2754 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2755 }
2756 return;
2757 case IBMVFC_CRQ_XPORT_EVENT:
2758 vhost->state = IBMVFC_NO_CRQ;
2759 vhost->logged_in = 0;
2760 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2761 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2762 /* We need to re-setup the interpartition connection */
2763 dev_info(vhost->dev, "Re-enabling adapter\n");
2764 vhost->client_migrated = 1;
2765 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2766 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2767 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
2768 } else {
2769 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2770 ibmvfc_purge_requests(vhost, DID_ERROR);
2771 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2772 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
2773 }
2774 return;
2775 case IBMVFC_CRQ_CMD_RSP:
2776 break;
2777 default:
2778 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2779 return;
2780 }
2781
2782 if (crq->format == IBMVFC_ASYNC_EVENT)
2783 return;
2784
2785 /* The only kind of payload CRQs we should get are responses to
2786 * things we send. Make sure this response is to something we
2787 * actually sent
2788 */
2789 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2790 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
2791 crq->ioba);
2792 return;
2793 }
2794
2795 if (unlikely(atomic_read(&evt->free))) {
2796 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
2797 crq->ioba);
2798 return;
2799 }
2800
2801 del_timer(&evt->timer);
2802 list_del(&evt->queue);
2803 ibmvfc_trc_end(evt);
2804 evt->done(evt);
2805 }
2806
2807 /**
2808 * ibmvfc_scan_finished - Check if the device scan is done.
2809 * @shost: scsi host struct
2810 * @time: current elapsed time
2811 *
2812 * Returns:
2813 * 0 if scan is not done / 1 if scan is done
2814 **/
2815 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2816 {
2817 unsigned long flags;
2818 struct ibmvfc_host *vhost = shost_priv(shost);
2819 int done = 0;
2820
2821 spin_lock_irqsave(shost->host_lock, flags);
2822 if (time >= (init_timeout * HZ)) {
2823 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2824 "continuing initialization\n", init_timeout);
2825 done = 1;
2826 }
2827
2828 if (vhost->scan_complete)
2829 done = 1;
2830 spin_unlock_irqrestore(shost->host_lock, flags);
2831 return done;
2832 }
2833
2834 /**
2835 * ibmvfc_slave_alloc - Setup the device's task set value
2836 * @sdev: struct scsi_device device to configure
2837 *
2838 * Set the device's task set value so that error handling works as
2839 * expected.
2840 *
2841 * Returns:
2842 * 0 on success / -ENXIO if device does not exist
2843 **/
2844 static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2845 {
2846 struct Scsi_Host *shost = sdev->host;
2847 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2848 struct ibmvfc_host *vhost = shost_priv(shost);
2849 unsigned long flags = 0;
2850
2851 if (!rport || fc_remote_port_chkready(rport))
2852 return -ENXIO;
2853
2854 spin_lock_irqsave(shost->host_lock, flags);
2855 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2856 spin_unlock_irqrestore(shost->host_lock, flags);
2857 return 0;
2858 }
2859
2860 /**
2861 * ibmvfc_target_alloc - Setup the target's task set value
2862 * @starget: struct scsi_target
2863 *
2864 * Set the target's task set value so that error handling works as
2865 * expected.
2866 *
2867 * Returns:
2868 * 0 on success / -ENXIO if device does not exist
2869 **/
2870 static int ibmvfc_target_alloc(struct scsi_target *starget)
2871 {
2872 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2873 struct ibmvfc_host *vhost = shost_priv(shost);
2874 unsigned long flags = 0;
2875
2876 spin_lock_irqsave(shost->host_lock, flags);
2877 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2878 spin_unlock_irqrestore(shost->host_lock, flags);
2879 return 0;
2880 }
2881
2882 /**
2883 * ibmvfc_slave_configure - Configure the device
2884 * @sdev: struct scsi_device device to configure
2885 *
2886 * Enable allow_restart for a device if it is a disk. Adjust the
2887 * queue_depth here also.
2888 *
2889 * Returns:
2890 * 0
2891 **/
2892 static int ibmvfc_slave_configure(struct scsi_device *sdev)
2893 {
2894 struct Scsi_Host *shost = sdev->host;
2895 unsigned long flags = 0;
2896
2897 spin_lock_irqsave(shost->host_lock, flags);
2898 if (sdev->type == TYPE_DISK)
2899 sdev->allow_restart = 1;
2900 spin_unlock_irqrestore(shost->host_lock, flags);
2901 return 0;
2902 }
2903
2904 /**
2905 * ibmvfc_change_queue_depth - Change the device's queue depth
2906 * @sdev: scsi device struct
2907 * @qdepth: depth to set
2908 * @reason: calling context
2909 *
2910 * Return value:
2911 * actual depth set
2912 **/
2913 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2914 {
2915 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2916 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2917
2918 return scsi_change_queue_depth(sdev, qdepth);
2919 }
2920
2921 static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2922 struct device_attribute *attr, char *buf)
2923 {
2924 struct Scsi_Host *shost = class_to_shost(dev);
2925 struct ibmvfc_host *vhost = shost_priv(shost);
2926
2927 return snprintf(buf, PAGE_SIZE, "%s\n",
2928 vhost->login_buf->resp.partition_name);
2929 }
2930
2931 static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2932 struct device_attribute *attr, char *buf)
2933 {
2934 struct Scsi_Host *shost = class_to_shost(dev);
2935 struct ibmvfc_host *vhost = shost_priv(shost);
2936
2937 return snprintf(buf, PAGE_SIZE, "%s\n",
2938 vhost->login_buf->resp.device_name);
2939 }
2940
2941 static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2942 struct device_attribute *attr, char *buf)
2943 {
2944 struct Scsi_Host *shost = class_to_shost(dev);
2945 struct ibmvfc_host *vhost = shost_priv(shost);
2946
2947 return snprintf(buf, PAGE_SIZE, "%s\n",
2948 vhost->login_buf->resp.port_loc_code);
2949 }
2950
2951 static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2952 struct device_attribute *attr, char *buf)
2953 {
2954 struct Scsi_Host *shost = class_to_shost(dev);
2955 struct ibmvfc_host *vhost = shost_priv(shost);
2956
2957 return snprintf(buf, PAGE_SIZE, "%s\n",
2958 vhost->login_buf->resp.drc_name);
2959 }
2960
2961 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2962 struct device_attribute *attr, char *buf)
2963 {
2964 struct Scsi_Host *shost = class_to_shost(dev);
2965 struct ibmvfc_host *vhost = shost_priv(shost);
2966 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2967 }
2968
2969 static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2970 struct device_attribute *attr, char *buf)
2971 {
2972 struct Scsi_Host *shost = class_to_shost(dev);
2973 struct ibmvfc_host *vhost = shost_priv(shost);
2974 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2975 }
2976
2977 /**
2978 * ibmvfc_show_log_level - Show the adapter's error logging level
2979 * @dev: class device struct
2980 * @buf: buffer
2981 *
2982 * Return value:
2983 * number of bytes printed to buffer
2984 **/
2985 static ssize_t ibmvfc_show_log_level(struct device *dev,
2986 struct device_attribute *attr, char *buf)
2987 {
2988 struct Scsi_Host *shost = class_to_shost(dev);
2989 struct ibmvfc_host *vhost = shost_priv(shost);
2990 unsigned long flags = 0;
2991 int len;
2992
2993 spin_lock_irqsave(shost->host_lock, flags);
2994 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2995 spin_unlock_irqrestore(shost->host_lock, flags);
2996 return len;
2997 }
2998
2999 /**
3000 * ibmvfc_store_log_level - Change 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 **/
3007 static ssize_t ibmvfc_store_log_level(struct device *dev,
3008 struct device_attribute *attr,
3009 const char *buf, size_t count)
3010 {
3011 struct Scsi_Host *shost = class_to_shost(dev);
3012 struct ibmvfc_host *vhost = shost_priv(shost);
3013 unsigned long flags = 0;
3014
3015 spin_lock_irqsave(shost->host_lock, flags);
3016 vhost->log_level = simple_strtoul(buf, NULL, 10);
3017 spin_unlock_irqrestore(shost->host_lock, flags);
3018 return strlen(buf);
3019 }
3020
3021 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3022 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3023 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3024 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3025 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
3026 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
3027 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3028 ibmvfc_show_log_level, ibmvfc_store_log_level);
3029
3030 #ifdef CONFIG_SCSI_IBMVFC_TRACE
3031 /**
3032 * ibmvfc_read_trace - Dump the adapter trace
3033 * @filp: open sysfs file
3034 * @kobj: kobject struct
3035 * @bin_attr: bin_attribute struct
3036 * @buf: buffer
3037 * @off: offset
3038 * @count: buffer size
3039 *
3040 * Return value:
3041 * number of bytes printed to buffer
3042 **/
3043 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
3044 struct bin_attribute *bin_attr,
3045 char *buf, loff_t off, size_t count)
3046 {
3047 struct device *dev = container_of(kobj, struct device, kobj);
3048 struct Scsi_Host *shost = class_to_shost(dev);
3049 struct ibmvfc_host *vhost = shost_priv(shost);
3050 unsigned long flags = 0;
3051 int size = IBMVFC_TRACE_SIZE;
3052 char *src = (char *)vhost->trace;
3053
3054 if (off > size)
3055 return 0;
3056 if (off + count > size) {
3057 size -= off;
3058 count = size;
3059 }
3060
3061 spin_lock_irqsave(shost->host_lock, flags);
3062 memcpy(buf, &src[off], count);
3063 spin_unlock_irqrestore(shost->host_lock, flags);
3064 return count;
3065 }
3066
3067 static struct bin_attribute ibmvfc_trace_attr = {
3068 .attr = {
3069 .name = "trace",
3070 .mode = S_IRUGO,
3071 },
3072 .size = 0,
3073 .read = ibmvfc_read_trace,
3074 };
3075 #endif
3076
3077 static struct device_attribute *ibmvfc_attrs[] = {
3078 &dev_attr_partition_name,
3079 &dev_attr_device_name,
3080 &dev_attr_port_loc_code,
3081 &dev_attr_drc_name,
3082 &dev_attr_npiv_version,
3083 &dev_attr_capabilities,
3084 &dev_attr_log_level,
3085 NULL
3086 };
3087
3088 static struct scsi_host_template driver_template = {
3089 .module = THIS_MODULE,
3090 .name = "IBM POWER Virtual FC Adapter",
3091 .proc_name = IBMVFC_NAME,
3092 .queuecommand = ibmvfc_queuecommand,
3093 .eh_timed_out = fc_eh_timed_out,
3094 .eh_abort_handler = ibmvfc_eh_abort_handler,
3095 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3096 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3097 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3098 .slave_alloc = ibmvfc_slave_alloc,
3099 .slave_configure = ibmvfc_slave_configure,
3100 .target_alloc = ibmvfc_target_alloc,
3101 .scan_finished = ibmvfc_scan_finished,
3102 .change_queue_depth = ibmvfc_change_queue_depth,
3103 .cmd_per_lun = 16,
3104 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3105 .this_id = -1,
3106 .sg_tablesize = SG_ALL,
3107 .max_sectors = IBMVFC_MAX_SECTORS,
3108 .use_clustering = ENABLE_CLUSTERING,
3109 .shost_attrs = ibmvfc_attrs,
3110 .track_queue_depth = 1,
3111 };
3112
3113 /**
3114 * ibmvfc_next_async_crq - Returns the next entry in async queue
3115 * @vhost: ibmvfc host struct
3116 *
3117 * Returns:
3118 * Pointer to next entry in queue / NULL if empty
3119 **/
3120 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3121 {
3122 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3123 struct ibmvfc_async_crq *crq;
3124
3125 crq = &async_crq->msgs[async_crq->cur];
3126 if (crq->valid & 0x80) {
3127 if (++async_crq->cur == async_crq->size)
3128 async_crq->cur = 0;
3129 rmb();
3130 } else
3131 crq = NULL;
3132
3133 return crq;
3134 }
3135
3136 /**
3137 * ibmvfc_next_crq - Returns the next entry in message queue
3138 * @vhost: ibmvfc host struct
3139 *
3140 * Returns:
3141 * Pointer to next entry in queue / NULL if empty
3142 **/
3143 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3144 {
3145 struct ibmvfc_crq_queue *queue = &vhost->crq;
3146 struct ibmvfc_crq *crq;
3147
3148 crq = &queue->msgs[queue->cur];
3149 if (crq->valid & 0x80) {
3150 if (++queue->cur == queue->size)
3151 queue->cur = 0;
3152 rmb();
3153 } else
3154 crq = NULL;
3155
3156 return crq;
3157 }
3158
3159 /**
3160 * ibmvfc_interrupt - Interrupt handler
3161 * @irq: number of irq to handle, not used
3162 * @dev_instance: ibmvfc_host that received interrupt
3163 *
3164 * Returns:
3165 * IRQ_HANDLED
3166 **/
3167 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3168 {
3169 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3170 unsigned long flags;
3171
3172 spin_lock_irqsave(vhost->host->host_lock, flags);
3173 vio_disable_interrupts(to_vio_dev(vhost->dev));
3174 tasklet_schedule(&vhost->tasklet);
3175 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3176 return IRQ_HANDLED;
3177 }
3178
3179 /**
3180 * ibmvfc_tasklet - Interrupt handler tasklet
3181 * @data: ibmvfc host struct
3182 *
3183 * Returns:
3184 * Nothing
3185 **/
3186 static void ibmvfc_tasklet(void *data)
3187 {
3188 struct ibmvfc_host *vhost = data;
3189 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3190 struct ibmvfc_crq *crq;
3191 struct ibmvfc_async_crq *async;
3192 unsigned long flags;
3193 int done = 0;
3194
3195 spin_lock_irqsave(vhost->host->host_lock, flags);
3196 while (!done) {
3197 /* Pull all the valid messages off the async CRQ */
3198 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3199 ibmvfc_handle_async(async, vhost);
3200 async->valid = 0;
3201 wmb();
3202 }
3203
3204 /* Pull all the valid messages off the CRQ */
3205 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3206 ibmvfc_handle_crq(crq, vhost);
3207 crq->valid = 0;
3208 wmb();
3209 }
3210
3211 vio_enable_interrupts(vdev);
3212 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3213 vio_disable_interrupts(vdev);
3214 ibmvfc_handle_async(async, vhost);
3215 async->valid = 0;
3216 wmb();
3217 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3218 vio_disable_interrupts(vdev);
3219 ibmvfc_handle_crq(crq, vhost);
3220 crq->valid = 0;
3221 wmb();
3222 } else
3223 done = 1;
3224 }
3225
3226 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3227 }
3228
3229 /**
3230 * ibmvfc_init_tgt - Set the next init job step for the target
3231 * @tgt: ibmvfc target struct
3232 * @job_step: job step to perform
3233 *
3234 **/
3235 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3236 void (*job_step) (struct ibmvfc_target *))
3237 {
3238 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3239 tgt->job_step = job_step;
3240 wake_up(&tgt->vhost->work_wait_q);
3241 }
3242
3243 /**
3244 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3245 * @tgt: ibmvfc target struct
3246 * @job_step: initialization job step
3247 *
3248 * Returns: 1 if step will be retried / 0 if not
3249 *
3250 **/
3251 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3252 void (*job_step) (struct ibmvfc_target *))
3253 {
3254 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3255 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3256 wake_up(&tgt->vhost->work_wait_q);
3257 return 0;
3258 } else
3259 ibmvfc_init_tgt(tgt, job_step);
3260 return 1;
3261 }
3262
3263 /* Defined in FC-LS */
3264 static const struct {
3265 int code;
3266 int retry;
3267 int logged_in;
3268 } prli_rsp [] = {
3269 { 0, 1, 0 },
3270 { 1, 0, 1 },
3271 { 2, 1, 0 },
3272 { 3, 1, 0 },
3273 { 4, 0, 0 },
3274 { 5, 0, 0 },
3275 { 6, 0, 1 },
3276 { 7, 0, 0 },
3277 { 8, 1, 0 },
3278 };
3279
3280 /**
3281 * ibmvfc_get_prli_rsp - Find PRLI response index
3282 * @flags: PRLI response flags
3283 *
3284 **/
3285 static int ibmvfc_get_prli_rsp(u16 flags)
3286 {
3287 int i;
3288 int code = (flags & 0x0f00) >> 8;
3289
3290 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3291 if (prli_rsp[i].code == code)
3292 return i;
3293
3294 return 0;
3295 }
3296
3297 /**
3298 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3299 * @evt: ibmvfc event struct
3300 *
3301 **/
3302 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3303 {
3304 struct ibmvfc_target *tgt = evt->tgt;
3305 struct ibmvfc_host *vhost = evt->vhost;
3306 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3307 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3308 u32 status = be16_to_cpu(rsp->common.status);
3309 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3310
3311 vhost->discovery_threads--;
3312 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3313 switch (status) {
3314 case IBMVFC_MAD_SUCCESS:
3315 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3316 parms->type, parms->flags, parms->service_parms);
3317
3318 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3319 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
3320 if (prli_rsp[index].logged_in) {
3321 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
3322 tgt->need_login = 0;
3323 tgt->ids.roles = 0;
3324 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
3325 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3326 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
3327 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3328 tgt->add_rport = 1;
3329 } else
3330 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3331 } else if (prli_rsp[index].retry)
3332 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3333 else
3334 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3335 } else
3336 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3337 break;
3338 case IBMVFC_MAD_DRIVER_FAILED:
3339 break;
3340 case IBMVFC_MAD_CRQ_ERROR:
3341 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3342 break;
3343 case IBMVFC_MAD_FAILED:
3344 default:
3345 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3346 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
3347 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3348 else if (tgt->logo_rcvd)
3349 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3350 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3351 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3352 else
3353 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3354
3355 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3356 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3357 rsp->status, rsp->error, status);
3358 break;
3359 };
3360
3361 kref_put(&tgt->kref, ibmvfc_release_tgt);
3362 ibmvfc_free_event(evt);
3363 wake_up(&vhost->work_wait_q);
3364 }
3365
3366 /**
3367 * ibmvfc_tgt_send_prli - Send a process login
3368 * @tgt: ibmvfc target struct
3369 *
3370 **/
3371 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3372 {
3373 struct ibmvfc_process_login *prli;
3374 struct ibmvfc_host *vhost = tgt->vhost;
3375 struct ibmvfc_event *evt;
3376
3377 if (vhost->discovery_threads >= disc_threads)
3378 return;
3379
3380 kref_get(&tgt->kref);
3381 evt = ibmvfc_get_event(vhost);
3382 vhost->discovery_threads++;
3383 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3384 evt->tgt = tgt;
3385 prli = &evt->iu.prli;
3386 memset(prli, 0, sizeof(*prli));
3387 prli->common.version = cpu_to_be32(1);
3388 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3389 prli->common.length = cpu_to_be16(sizeof(*prli));
3390 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
3391
3392 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3393 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3394 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
3395 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
3396
3397 if (cls3_error)
3398 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3399
3400 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3401 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3402 vhost->discovery_threads--;
3403 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3404 kref_put(&tgt->kref, ibmvfc_release_tgt);
3405 } else
3406 tgt_dbg(tgt, "Sent process login\n");
3407 }
3408
3409 /**
3410 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3411 * @evt: ibmvfc event struct
3412 *
3413 **/
3414 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3415 {
3416 struct ibmvfc_target *tgt = evt->tgt;
3417 struct ibmvfc_host *vhost = evt->vhost;
3418 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3419 u32 status = be16_to_cpu(rsp->common.status);
3420 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3421
3422 vhost->discovery_threads--;
3423 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3424 switch (status) {
3425 case IBMVFC_MAD_SUCCESS:
3426 tgt_dbg(tgt, "Port Login succeeded\n");
3427 if (tgt->ids.port_name &&
3428 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3429 vhost->reinit = 1;
3430 tgt_dbg(tgt, "Port re-init required\n");
3431 break;
3432 }
3433 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3434 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3435 tgt->ids.port_id = tgt->scsi_id;
3436 memcpy(&tgt->service_parms, &rsp->service_parms,
3437 sizeof(tgt->service_parms));
3438 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3439 sizeof(tgt->service_parms_change));
3440 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3441 break;
3442 case IBMVFC_MAD_DRIVER_FAILED:
3443 break;
3444 case IBMVFC_MAD_CRQ_ERROR:
3445 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3446 break;
3447 case IBMVFC_MAD_FAILED:
3448 default:
3449 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3450 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3451 else
3452 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3453
3454 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3455 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error,
3456 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type,
3457 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status);
3458 break;
3459 };
3460
3461 kref_put(&tgt->kref, ibmvfc_release_tgt);
3462 ibmvfc_free_event(evt);
3463 wake_up(&vhost->work_wait_q);
3464 }
3465
3466 /**
3467 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3468 * @tgt: ibmvfc target struct
3469 *
3470 **/
3471 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3472 {
3473 struct ibmvfc_port_login *plogi;
3474 struct ibmvfc_host *vhost = tgt->vhost;
3475 struct ibmvfc_event *evt;
3476
3477 if (vhost->discovery_threads >= disc_threads)
3478 return;
3479
3480 kref_get(&tgt->kref);
3481 tgt->logo_rcvd = 0;
3482 evt = ibmvfc_get_event(vhost);
3483 vhost->discovery_threads++;
3484 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3485 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3486 evt->tgt = tgt;
3487 plogi = &evt->iu.plogi;
3488 memset(plogi, 0, sizeof(*plogi));
3489 plogi->common.version = cpu_to_be32(1);
3490 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3491 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3492 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
3493
3494 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3495 vhost->discovery_threads--;
3496 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3497 kref_put(&tgt->kref, ibmvfc_release_tgt);
3498 } else
3499 tgt_dbg(tgt, "Sent port login\n");
3500 }
3501
3502 /**
3503 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3504 * @evt: ibmvfc event struct
3505 *
3506 **/
3507 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3508 {
3509 struct ibmvfc_target *tgt = evt->tgt;
3510 struct ibmvfc_host *vhost = evt->vhost;
3511 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3512 u32 status = be16_to_cpu(rsp->common.status);
3513
3514 vhost->discovery_threads--;
3515 ibmvfc_free_event(evt);
3516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3517
3518 switch (status) {
3519 case IBMVFC_MAD_SUCCESS:
3520 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3521 break;
3522 case IBMVFC_MAD_DRIVER_FAILED:
3523 kref_put(&tgt->kref, ibmvfc_release_tgt);
3524 wake_up(&vhost->work_wait_q);
3525 return;
3526 case IBMVFC_MAD_FAILED:
3527 default:
3528 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3529 break;
3530 };
3531
3532 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3533 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3534 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3535 tgt->scsi_id != tgt->new_scsi_id)
3536 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3537 kref_put(&tgt->kref, ibmvfc_release_tgt);
3538 wake_up(&vhost->work_wait_q);
3539 }
3540
3541 /**
3542 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3543 * @tgt: ibmvfc target struct
3544 *
3545 **/
3546 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3547 {
3548 struct ibmvfc_implicit_logout *mad;
3549 struct ibmvfc_host *vhost = tgt->vhost;
3550 struct ibmvfc_event *evt;
3551
3552 if (vhost->discovery_threads >= disc_threads)
3553 return;
3554
3555 kref_get(&tgt->kref);
3556 evt = ibmvfc_get_event(vhost);
3557 vhost->discovery_threads++;
3558 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3559 evt->tgt = tgt;
3560 mad = &evt->iu.implicit_logout;
3561 memset(mad, 0, sizeof(*mad));
3562 mad->common.version = cpu_to_be32(1);
3563 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3564 mad->common.length = cpu_to_be16(sizeof(*mad));
3565 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
3566
3567 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3568 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3569 vhost->discovery_threads--;
3570 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3571 kref_put(&tgt->kref, ibmvfc_release_tgt);
3572 } else
3573 tgt_dbg(tgt, "Sent Implicit Logout\n");
3574 }
3575
3576 /**
3577 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3578 * @mad: ibmvfc passthru mad struct
3579 * @tgt: ibmvfc target struct
3580 *
3581 * Returns:
3582 * 1 if PLOGI needed / 0 if PLOGI not needed
3583 **/
3584 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3585 struct ibmvfc_target *tgt)
3586 {
3587 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3588 sizeof(tgt->ids.port_name)))
3589 return 1;
3590 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3591 sizeof(tgt->ids.node_name)))
3592 return 1;
3593 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
3594 return 1;
3595 return 0;
3596 }
3597
3598 /**
3599 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3600 * @evt: ibmvfc event struct
3601 *
3602 **/
3603 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3604 {
3605 struct ibmvfc_target *tgt = evt->tgt;
3606 struct ibmvfc_host *vhost = evt->vhost;
3607 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3608 u32 status = be16_to_cpu(mad->common.status);
3609 u8 fc_reason, fc_explain;
3610
3611 vhost->discovery_threads--;
3612 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3613 del_timer(&tgt->timer);
3614
3615 switch (status) {
3616 case IBMVFC_MAD_SUCCESS:
3617 tgt_dbg(tgt, "ADISC succeeded\n");
3618 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3619 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3620 break;
3621 case IBMVFC_MAD_DRIVER_FAILED:
3622 break;
3623 case IBMVFC_MAD_FAILED:
3624 default:
3625 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3626 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3627 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
3628 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3629 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
3630 mad->iu.status, mad->iu.error,
3631 ibmvfc_get_fc_type(fc_reason), fc_reason,
3632 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3633 break;
3634 };
3635
3636 kref_put(&tgt->kref, ibmvfc_release_tgt);
3637 ibmvfc_free_event(evt);
3638 wake_up(&vhost->work_wait_q);
3639 }
3640
3641 /**
3642 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3643 * @evt: ibmvfc event struct
3644 *
3645 **/
3646 static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3647 {
3648 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3649
3650 memset(mad, 0, sizeof(*mad));
3651 mad->common.version = cpu_to_be32(1);
3652 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3653 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3654 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3655 offsetof(struct ibmvfc_passthru_mad, iu));
3656 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3657 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3658 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3659 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3660 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3661 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3662 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3663 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3664 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3665 offsetof(struct ibmvfc_passthru_fc_iu, response));
3666 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
3667 }
3668
3669 /**
3670 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3671 * @evt: ibmvfc event struct
3672 *
3673 * Just cleanup this event struct. Everything else is handled by
3674 * the ADISC completion handler. If the ADISC never actually comes
3675 * back, we still have the timer running on the ADISC event struct
3676 * which will fire and cause the CRQ to get reset.
3677 *
3678 **/
3679 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3680 {
3681 struct ibmvfc_host *vhost = evt->vhost;
3682 struct ibmvfc_target *tgt = evt->tgt;
3683
3684 tgt_dbg(tgt, "ADISC cancel complete\n");
3685 vhost->abort_threads--;
3686 ibmvfc_free_event(evt);
3687 kref_put(&tgt->kref, ibmvfc_release_tgt);
3688 wake_up(&vhost->work_wait_q);
3689 }
3690
3691 /**
3692 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3693 * @tgt: ibmvfc target struct
3694 *
3695 * If an ADISC times out, send a cancel. If the cancel times
3696 * out, reset the CRQ. When the ADISC comes back as cancelled,
3697 * log back into the target.
3698 **/
3699 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3700 {
3701 struct ibmvfc_host *vhost = tgt->vhost;
3702 struct ibmvfc_event *evt;
3703 struct ibmvfc_tmf *tmf;
3704 unsigned long flags;
3705 int rc;
3706
3707 tgt_dbg(tgt, "ADISC timeout\n");
3708 spin_lock_irqsave(vhost->host->host_lock, flags);
3709 if (vhost->abort_threads >= disc_threads ||
3710 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3711 vhost->state != IBMVFC_INITIALIZING ||
3712 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3713 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3714 return;
3715 }
3716
3717 vhost->abort_threads++;
3718 kref_get(&tgt->kref);
3719 evt = ibmvfc_get_event(vhost);
3720 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3721
3722 evt->tgt = tgt;
3723 tmf = &evt->iu.tmf;
3724 memset(tmf, 0, sizeof(*tmf));
3725 tmf->common.version = cpu_to_be32(1);
3726 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3727 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3728 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3729 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
3730
3731 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3732
3733 if (rc) {
3734 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3735 vhost->abort_threads--;
3736 kref_put(&tgt->kref, ibmvfc_release_tgt);
3737 __ibmvfc_reset_host(vhost);
3738 } else
3739 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3740 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3741 }
3742
3743 /**
3744 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3745 * @tgt: ibmvfc target struct
3746 *
3747 * When sending an ADISC we end up with two timers running. The
3748 * first timer is the timer in the ibmvfc target struct. If this
3749 * fires, we send a cancel to the target. The second timer is the
3750 * timer on the ibmvfc event for the ADISC, which is longer. If that
3751 * fires, it means the ADISC timed out and our attempt to cancel it
3752 * also failed, so we need to reset the CRQ.
3753 **/
3754 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3755 {
3756 struct ibmvfc_passthru_mad *mad;
3757 struct ibmvfc_host *vhost = tgt->vhost;
3758 struct ibmvfc_event *evt;
3759
3760 if (vhost->discovery_threads >= disc_threads)
3761 return;
3762
3763 kref_get(&tgt->kref);
3764 evt = ibmvfc_get_event(vhost);
3765 vhost->discovery_threads++;
3766 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3767 evt->tgt = tgt;
3768
3769 ibmvfc_init_passthru(evt);
3770 mad = &evt->iu.passthru;
3771 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3772 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3773 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
3774
3775 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
3776 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3777 sizeof(vhost->login_buf->resp.port_name));
3778 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3779 sizeof(vhost->login_buf->resp.node_name));
3780 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
3781
3782 if (timer_pending(&tgt->timer))
3783 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3784 else {
3785 tgt->timer.data = (unsigned long) tgt;
3786 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3787 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3788 add_timer(&tgt->timer);
3789 }
3790
3791 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3792 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
3793 vhost->discovery_threads--;
3794 del_timer(&tgt->timer);
3795 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3796 kref_put(&tgt->kref, ibmvfc_release_tgt);
3797 } else
3798 tgt_dbg(tgt, "Sent ADISC\n");
3799 }
3800
3801 /**
3802 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3803 * @evt: ibmvfc event struct
3804 *
3805 **/
3806 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3807 {
3808 struct ibmvfc_target *tgt = evt->tgt;
3809 struct ibmvfc_host *vhost = evt->vhost;
3810 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3811 u32 status = be16_to_cpu(rsp->common.status);
3812 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3813
3814 vhost->discovery_threads--;
3815 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3816 switch (status) {
3817 case IBMVFC_MAD_SUCCESS:
3818 tgt_dbg(tgt, "Query Target succeeded\n");
3819 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3820 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
3821 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3822 else
3823 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
3824 break;
3825 case IBMVFC_MAD_DRIVER_FAILED:
3826 break;
3827 case IBMVFC_MAD_CRQ_ERROR:
3828 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3829 break;
3830 case IBMVFC_MAD_FAILED:
3831 default:
3832 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3833 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3834 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
3835 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3836 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3837 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3838 else
3839 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3840
3841 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3842 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3843 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)),
3844 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)),
3845 rsp->fc_explain, status);
3846 break;
3847 };
3848
3849 kref_put(&tgt->kref, ibmvfc_release_tgt);
3850 ibmvfc_free_event(evt);
3851 wake_up(&vhost->work_wait_q);
3852 }
3853
3854 /**
3855 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3856 * @tgt: ibmvfc target struct
3857 *
3858 **/
3859 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3860 {
3861 struct ibmvfc_query_tgt *query_tgt;
3862 struct ibmvfc_host *vhost = tgt->vhost;
3863 struct ibmvfc_event *evt;
3864
3865 if (vhost->discovery_threads >= disc_threads)
3866 return;
3867
3868 kref_get(&tgt->kref);
3869 evt = ibmvfc_get_event(vhost);
3870 vhost->discovery_threads++;
3871 evt->tgt = tgt;
3872 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3873 query_tgt = &evt->iu.query_tgt;
3874 memset(query_tgt, 0, sizeof(*query_tgt));
3875 query_tgt->common.version = cpu_to_be32(1);
3876 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3877 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3878 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
3879
3880 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3881 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3882 vhost->discovery_threads--;
3883 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3884 kref_put(&tgt->kref, ibmvfc_release_tgt);
3885 } else
3886 tgt_dbg(tgt, "Sent Query Target\n");
3887 }
3888
3889 /**
3890 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3891 * @vhost: ibmvfc host struct
3892 * @scsi_id: SCSI ID to allocate target for
3893 *
3894 * Returns:
3895 * 0 on success / other on failure
3896 **/
3897 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3898 {
3899 struct ibmvfc_target *tgt;
3900 unsigned long flags;
3901
3902 spin_lock_irqsave(vhost->host->host_lock, flags);
3903 list_for_each_entry(tgt, &vhost->targets, queue) {
3904 if (tgt->scsi_id == scsi_id) {
3905 if (tgt->need_login)
3906 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3907 goto unlock_out;
3908 }
3909 }
3910 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3911
3912 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
3913 memset(tgt, 0, sizeof(*tgt));
3914 tgt->scsi_id = scsi_id;
3915 tgt->new_scsi_id = scsi_id;
3916 tgt->vhost = vhost;
3917 tgt->need_login = 1;
3918 tgt->cancel_key = vhost->task_set++;
3919 init_timer(&tgt->timer);
3920 kref_init(&tgt->kref);
3921 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3922 spin_lock_irqsave(vhost->host->host_lock, flags);
3923 list_add_tail(&tgt->queue, &vhost->targets);
3924
3925 unlock_out:
3926 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3927 return 0;
3928 }
3929
3930 /**
3931 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3932 * @vhost: ibmvfc host struct
3933 *
3934 * Returns:
3935 * 0 on success / other on failure
3936 **/
3937 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3938 {
3939 int i, rc;
3940
3941 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3942 rc = ibmvfc_alloc_target(vhost,
3943 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3944 IBMVFC_DISC_TGT_SCSI_ID_MASK);
3945
3946 return rc;
3947 }
3948
3949 /**
3950 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3951 * @evt: ibmvfc event struct
3952 *
3953 **/
3954 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3955 {
3956 struct ibmvfc_host *vhost = evt->vhost;
3957 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3958 u32 mad_status = be16_to_cpu(rsp->common.status);
3959 int level = IBMVFC_DEFAULT_LOG_LEVEL;
3960
3961 switch (mad_status) {
3962 case IBMVFC_MAD_SUCCESS:
3963 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3964 vhost->num_targets = be32_to_cpu(rsp->num_written);
3965 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3966 break;
3967 case IBMVFC_MAD_FAILED:
3968 level += ibmvfc_retry_host_init(vhost);
3969 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3970 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3971 rsp->status, rsp->error);
3972 break;
3973 case IBMVFC_MAD_DRIVER_FAILED:
3974 break;
3975 default:
3976 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3977 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3978 break;
3979 }
3980
3981 ibmvfc_free_event(evt);
3982 wake_up(&vhost->work_wait_q);
3983 }
3984
3985 /**
3986 * ibmvfc_discover_targets - Send Discover Targets MAD
3987 * @vhost: ibmvfc host struct
3988 *
3989 **/
3990 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3991 {
3992 struct ibmvfc_discover_targets *mad;
3993 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3994
3995 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3996 mad = &evt->iu.discover_targets;
3997 memset(mad, 0, sizeof(*mad));
3998 mad->common.version = cpu_to_be32(1);
3999 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
4000 mad->common.length = cpu_to_be16(sizeof(*mad));
4001 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
4002 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
4003 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
4004 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4005
4006 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4007 ibmvfc_dbg(vhost, "Sent discover targets\n");
4008 else
4009 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4010 }
4011
4012 /**
4013 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4014 * @evt: ibmvfc event struct
4015 *
4016 **/
4017 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4018 {
4019 struct ibmvfc_host *vhost = evt->vhost;
4020 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
4021 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4022 unsigned int npiv_max_sectors;
4023 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4024
4025 switch (mad_status) {
4026 case IBMVFC_MAD_SUCCESS:
4027 ibmvfc_free_event(evt);
4028 break;
4029 case IBMVFC_MAD_FAILED:
4030 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4031 level += ibmvfc_retry_host_init(vhost);
4032 else
4033 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4034 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
4035 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4036 rsp->status, rsp->error);
4037 ibmvfc_free_event(evt);
4038 return;
4039 case IBMVFC_MAD_CRQ_ERROR:
4040 ibmvfc_retry_host_init(vhost);
4041 case IBMVFC_MAD_DRIVER_FAILED:
4042 ibmvfc_free_event(evt);
4043 return;
4044 default:
4045 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4046 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4047 ibmvfc_free_event(evt);
4048 return;
4049 }
4050
4051 vhost->client_migrated = 0;
4052
4053 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
4054 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4055 rsp->flags);
4056 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4057 wake_up(&vhost->work_wait_q);
4058 return;
4059 }
4060
4061 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
4062 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4063 rsp->max_cmds);
4064 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4065 wake_up(&vhost->work_wait_q);
4066 return;
4067 }
4068
4069 vhost->logged_in = 1;
4070 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
4071 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4072 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4073 rsp->drc_name, npiv_max_sectors);
4074
4075 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4076 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4077 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4078 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
4079 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4080 fc_host_supported_classes(vhost->host) = 0;
4081 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
4082 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
4083 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
4084 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
4085 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
4086 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4087 fc_host_maxframe_size(vhost->host) =
4088 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
4089
4090 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
4091 vhost->host->max_sectors = npiv_max_sectors;
4092 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4093 wake_up(&vhost->work_wait_q);
4094 }
4095
4096 /**
4097 * ibmvfc_npiv_login - Sends NPIV login
4098 * @vhost: ibmvfc host struct
4099 *
4100 **/
4101 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4102 {
4103 struct ibmvfc_npiv_login_mad *mad;
4104 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4105
4106 ibmvfc_gather_partition_info(vhost);
4107 ibmvfc_set_login_info(vhost);
4108 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4109
4110 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4111 mad = &evt->iu.npiv_login;
4112 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
4113 mad->common.version = cpu_to_be32(1);
4114 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4115 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4116 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4117 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
4118
4119 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4120
4121 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4122 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4123 else
4124 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4125 };
4126
4127 /**
4128 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4129 * @vhost: ibmvfc host struct
4130 *
4131 **/
4132 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4133 {
4134 struct ibmvfc_host *vhost = evt->vhost;
4135 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
4136
4137 ibmvfc_free_event(evt);
4138
4139 switch (mad_status) {
4140 case IBMVFC_MAD_SUCCESS:
4141 if (list_empty(&vhost->sent) &&
4142 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
4143 ibmvfc_init_host(vhost);
4144 return;
4145 }
4146 break;
4147 case IBMVFC_MAD_FAILED:
4148 case IBMVFC_MAD_NOT_SUPPORTED:
4149 case IBMVFC_MAD_CRQ_ERROR:
4150 case IBMVFC_MAD_DRIVER_FAILED:
4151 default:
4152 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4153 break;
4154 }
4155
4156 ibmvfc_hard_reset_host(vhost);
4157 }
4158
4159 /**
4160 * ibmvfc_npiv_logout - Issue an NPIV Logout
4161 * @vhost: ibmvfc host struct
4162 *
4163 **/
4164 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4165 {
4166 struct ibmvfc_npiv_logout_mad *mad;
4167 struct ibmvfc_event *evt;
4168
4169 evt = ibmvfc_get_event(vhost);
4170 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4171
4172 mad = &evt->iu.npiv_logout;
4173 memset(mad, 0, sizeof(*mad));
4174 mad->common.version = cpu_to_be32(1);
4175 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4176 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
4177
4178 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4179
4180 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4181 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4182 else
4183 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4184 }
4185
4186 /**
4187 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4188 * @vhost: ibmvfc host struct
4189 *
4190 * Returns:
4191 * 1 if work to do / 0 if not
4192 **/
4193 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4194 {
4195 struct ibmvfc_target *tgt;
4196
4197 list_for_each_entry(tgt, &vhost->targets, queue) {
4198 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4199 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4200 return 1;
4201 }
4202
4203 return 0;
4204 }
4205
4206 /**
4207 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4208 * @vhost: ibmvfc host struct
4209 *
4210 * Returns:
4211 * 1 if work to do / 0 if not
4212 **/
4213 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4214 {
4215 struct ibmvfc_target *tgt;
4216
4217 if (kthread_should_stop())
4218 return 1;
4219 switch (vhost->action) {
4220 case IBMVFC_HOST_ACTION_NONE:
4221 case IBMVFC_HOST_ACTION_INIT_WAIT:
4222 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4223 return 0;
4224 case IBMVFC_HOST_ACTION_TGT_INIT:
4225 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4226 if (vhost->discovery_threads == disc_threads)
4227 return 0;
4228 list_for_each_entry(tgt, &vhost->targets, queue)
4229 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4230 return 1;
4231 list_for_each_entry(tgt, &vhost->targets, queue)
4232 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4233 return 0;
4234 return 1;
4235 case IBMVFC_HOST_ACTION_LOGO:
4236 case IBMVFC_HOST_ACTION_INIT:
4237 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4238 case IBMVFC_HOST_ACTION_TGT_DEL:
4239 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4240 case IBMVFC_HOST_ACTION_QUERY:
4241 case IBMVFC_HOST_ACTION_RESET:
4242 case IBMVFC_HOST_ACTION_REENABLE:
4243 default:
4244 break;
4245 };
4246
4247 return 1;
4248 }
4249
4250 /**
4251 * ibmvfc_work_to_do - Is there task level work to do?
4252 * @vhost: ibmvfc host struct
4253 *
4254 * Returns:
4255 * 1 if work to do / 0 if not
4256 **/
4257 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4258 {
4259 unsigned long flags;
4260 int rc;
4261
4262 spin_lock_irqsave(vhost->host->host_lock, flags);
4263 rc = __ibmvfc_work_to_do(vhost);
4264 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4265 return rc;
4266 }
4267
4268 /**
4269 * ibmvfc_log_ae - Log async events if necessary
4270 * @vhost: ibmvfc host struct
4271 * @events: events to log
4272 *
4273 **/
4274 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4275 {
4276 if (events & IBMVFC_AE_RSCN)
4277 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4278 if ((events & IBMVFC_AE_LINKDOWN) &&
4279 vhost->state >= IBMVFC_HALTED)
4280 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4281 if ((events & IBMVFC_AE_LINKUP) &&
4282 vhost->state == IBMVFC_INITIALIZING)
4283 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4284 }
4285
4286 /**
4287 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4288 * @tgt: ibmvfc target struct
4289 *
4290 **/
4291 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4292 {
4293 struct ibmvfc_host *vhost = tgt->vhost;
4294 struct fc_rport *rport;
4295 unsigned long flags;
4296
4297 tgt_dbg(tgt, "Adding rport\n");
4298 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4299 spin_lock_irqsave(vhost->host->host_lock, flags);
4300
4301 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4302 tgt_dbg(tgt, "Deleting rport\n");
4303 list_del(&tgt->queue);
4304 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4305 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4306 fc_remote_port_delete(rport);
4307 del_timer_sync(&tgt->timer);
4308 kref_put(&tgt->kref, ibmvfc_release_tgt);
4309 return;
4310 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4311 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4312 return;
4313 }
4314
4315 if (rport) {
4316 tgt_dbg(tgt, "rport add succeeded\n");
4317 tgt->rport = rport;
4318 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
4319 rport->supported_classes = 0;
4320 tgt->target_id = rport->scsi_target_id;
4321 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
4322 rport->supported_classes |= FC_COS_CLASS1;
4323 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
4324 rport->supported_classes |= FC_COS_CLASS2;
4325 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
4326 rport->supported_classes |= FC_COS_CLASS3;
4327 if (rport->rqst_q)
4328 blk_queue_max_segments(rport->rqst_q, 1);
4329 } else
4330 tgt_dbg(tgt, "rport add failed\n");
4331 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4332 }
4333
4334 /**
4335 * ibmvfc_do_work - Do task level work
4336 * @vhost: ibmvfc host struct
4337 *
4338 **/
4339 static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4340 {
4341 struct ibmvfc_target *tgt;
4342 unsigned long flags;
4343 struct fc_rport *rport;
4344 int rc;
4345
4346 ibmvfc_log_ae(vhost, vhost->events_to_log);
4347 spin_lock_irqsave(vhost->host->host_lock, flags);
4348 vhost->events_to_log = 0;
4349 switch (vhost->action) {
4350 case IBMVFC_HOST_ACTION_NONE:
4351 case IBMVFC_HOST_ACTION_LOGO_WAIT:
4352 case IBMVFC_HOST_ACTION_INIT_WAIT:
4353 break;
4354 case IBMVFC_HOST_ACTION_RESET:
4355 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4356 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4357 rc = ibmvfc_reset_crq(vhost);
4358 spin_lock_irqsave(vhost->host->host_lock, flags);
4359 if (rc == H_CLOSED)
4360 vio_enable_interrupts(to_vio_dev(vhost->dev));
4361 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4362 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
4363 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4364 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4365 }
4366 break;
4367 case IBMVFC_HOST_ACTION_REENABLE:
4368 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4369 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4370 rc = ibmvfc_reenable_crq_queue(vhost);
4371 spin_lock_irqsave(vhost->host->host_lock, flags);
4372 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4373 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4374 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4375 }
4376 break;
4377 case IBMVFC_HOST_ACTION_LOGO:
4378 vhost->job_step(vhost);
4379 break;
4380 case IBMVFC_HOST_ACTION_INIT:
4381 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
4382 if (vhost->delay_init) {
4383 vhost->delay_init = 0;
4384 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4385 ssleep(15);
4386 return;
4387 } else
4388 vhost->job_step(vhost);
4389 break;
4390 case IBMVFC_HOST_ACTION_QUERY:
4391 list_for_each_entry(tgt, &vhost->targets, queue)
4392 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4393 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4394 break;
4395 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4396 list_for_each_entry(tgt, &vhost->targets, queue) {
4397 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4398 tgt->job_step(tgt);
4399 break;
4400 }
4401 }
4402
4403 if (!ibmvfc_dev_init_to_do(vhost))
4404 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4405 break;
4406 case IBMVFC_HOST_ACTION_TGT_DEL:
4407 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
4408 list_for_each_entry(tgt, &vhost->targets, queue) {
4409 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4410 tgt_dbg(tgt, "Deleting rport\n");
4411 rport = tgt->rport;
4412 tgt->rport = NULL;
4413 list_del(&tgt->queue);
4414 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
4415 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4416 if (rport)
4417 fc_remote_port_delete(rport);
4418 del_timer_sync(&tgt->timer);
4419 kref_put(&tgt->kref, ibmvfc_release_tgt);
4420 return;
4421 }
4422 }
4423
4424 if (vhost->state == IBMVFC_INITIALIZING) {
4425 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
4426 if (vhost->reinit) {
4427 vhost->reinit = 0;
4428 scsi_block_requests(vhost->host);
4429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4430 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4431 } else {
4432 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4433 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4434 wake_up(&vhost->init_wait_q);
4435 schedule_work(&vhost->rport_add_work_q);
4436 vhost->init_retries = 0;
4437 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4438 scsi_unblock_requests(vhost->host);
4439 }
4440
4441 return;
4442 } else {
4443 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4444 vhost->job_step = ibmvfc_discover_targets;
4445 }
4446 } else {
4447 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4448 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4449 scsi_unblock_requests(vhost->host);
4450 wake_up(&vhost->init_wait_q);
4451 return;
4452 }
4453 break;
4454 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4455 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4456 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4457 ibmvfc_alloc_targets(vhost);
4458 spin_lock_irqsave(vhost->host->host_lock, flags);
4459 break;
4460 case IBMVFC_HOST_ACTION_TGT_INIT:
4461 list_for_each_entry(tgt, &vhost->targets, queue) {
4462 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4463 tgt->job_step(tgt);
4464 break;
4465 }
4466 }
4467
4468 if (!ibmvfc_dev_init_to_do(vhost))
4469 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
4470 break;
4471 default:
4472 break;
4473 };
4474
4475 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4476 }
4477
4478 /**
4479 * ibmvfc_work - Do task level work
4480 * @data: ibmvfc host struct
4481 *
4482 * Returns:
4483 * zero
4484 **/
4485 static int ibmvfc_work(void *data)
4486 {
4487 struct ibmvfc_host *vhost = data;
4488 int rc;
4489
4490 set_user_nice(current, MIN_NICE);
4491
4492 while (1) {
4493 rc = wait_event_interruptible(vhost->work_wait_q,
4494 ibmvfc_work_to_do(vhost));
4495
4496 BUG_ON(rc);
4497
4498 if (kthread_should_stop())
4499 break;
4500
4501 ibmvfc_do_work(vhost);
4502 }
4503
4504 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4505 return 0;
4506 }
4507
4508 /**
4509 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4510 * @vhost: ibmvfc host struct
4511 *
4512 * Allocates a page for messages, maps it for dma, and registers
4513 * the crq with the hypervisor.
4514 *
4515 * Return value:
4516 * zero on success / other on failure
4517 **/
4518 static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4519 {
4520 int rc, retrc = -ENOMEM;
4521 struct device *dev = vhost->dev;
4522 struct vio_dev *vdev = to_vio_dev(dev);
4523 struct ibmvfc_crq_queue *crq = &vhost->crq;
4524
4525 ENTER;
4526 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4527
4528 if (!crq->msgs)
4529 return -ENOMEM;
4530
4531 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4532 crq->msg_token = dma_map_single(dev, crq->msgs,
4533 PAGE_SIZE, DMA_BIDIRECTIONAL);
4534
4535 if (dma_mapping_error(dev, crq->msg_token))
4536 goto map_failed;
4537
4538 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4539 crq->msg_token, PAGE_SIZE);
4540
4541 if (rc == H_RESOURCE)
4542 /* maybe kexecing and resource is busy. try a reset */
4543 retrc = rc = ibmvfc_reset_crq(vhost);
4544
4545 if (rc == H_CLOSED)
4546 dev_warn(dev, "Partner adapter not ready\n");
4547 else if (rc) {
4548 dev_warn(dev, "Error %d opening adapter\n", rc);
4549 goto reg_crq_failed;
4550 }
4551
4552 retrc = 0;
4553
4554 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4555
4556 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4557 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4558 goto req_irq_failed;
4559 }
4560
4561 if ((rc = vio_enable_interrupts(vdev))) {
4562 dev_err(dev, "Error %d enabling interrupts\n", rc);
4563 goto req_irq_failed;
4564 }
4565
4566 crq->cur = 0;
4567 LEAVE;
4568 return retrc;
4569
4570 req_irq_failed:
4571 tasklet_kill(&vhost->tasklet);
4572 do {
4573 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4574 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4575 reg_crq_failed:
4576 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4577 map_failed:
4578 free_page((unsigned long)crq->msgs);
4579 return retrc;
4580 }
4581
4582 /**
4583 * ibmvfc_free_mem - Free memory for vhost
4584 * @vhost: ibmvfc host struct
4585 *
4586 * Return value:
4587 * none
4588 **/
4589 static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4590 {
4591 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4592
4593 ENTER;
4594 mempool_destroy(vhost->tgt_pool);
4595 kfree(vhost->trace);
4596 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4597 vhost->disc_buf_dma);
4598 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4599 vhost->login_buf, vhost->login_buf_dma);
4600 dma_pool_destroy(vhost->sg_pool);
4601 dma_unmap_single(vhost->dev, async_q->msg_token,
4602 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4603 free_page((unsigned long)async_q->msgs);
4604 LEAVE;
4605 }
4606
4607 /**
4608 * ibmvfc_alloc_mem - Allocate memory for vhost
4609 * @vhost: ibmvfc host struct
4610 *
4611 * Return value:
4612 * 0 on success / non-zero on failure
4613 **/
4614 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4615 {
4616 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4617 struct device *dev = vhost->dev;
4618
4619 ENTER;
4620 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4621 if (!async_q->msgs) {
4622 dev_err(dev, "Couldn't allocate async queue.\n");
4623 goto nomem;
4624 }
4625
4626 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4627 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4628 async_q->size * sizeof(*async_q->msgs),
4629 DMA_BIDIRECTIONAL);
4630
4631 if (dma_mapping_error(dev, async_q->msg_token)) {
4632 dev_err(dev, "Failed to map async queue\n");
4633 goto free_async_crq;
4634 }
4635
4636 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4637 SG_ALL * sizeof(struct srp_direct_buf),
4638 sizeof(struct srp_direct_buf), 0);
4639
4640 if (!vhost->sg_pool) {
4641 dev_err(dev, "Failed to allocate sg pool\n");
4642 goto unmap_async_crq;
4643 }
4644
4645 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4646 &vhost->login_buf_dma, GFP_KERNEL);
4647
4648 if (!vhost->login_buf) {
4649 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4650 goto free_sg_pool;
4651 }
4652
4653 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4654 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4655 &vhost->disc_buf_dma, GFP_KERNEL);
4656
4657 if (!vhost->disc_buf) {
4658 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4659 goto free_login_buffer;
4660 }
4661
4662 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4663 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4664
4665 if (!vhost->trace)
4666 goto free_disc_buffer;
4667
4668 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4669 sizeof(struct ibmvfc_target));
4670
4671 if (!vhost->tgt_pool) {
4672 dev_err(dev, "Couldn't allocate target memory pool\n");
4673 goto free_trace;
4674 }
4675
4676 LEAVE;
4677 return 0;
4678
4679 free_trace:
4680 kfree(vhost->trace);
4681 free_disc_buffer:
4682 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4683 vhost->disc_buf_dma);
4684 free_login_buffer:
4685 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4686 vhost->login_buf, vhost->login_buf_dma);
4687 free_sg_pool:
4688 dma_pool_destroy(vhost->sg_pool);
4689 unmap_async_crq:
4690 dma_unmap_single(dev, async_q->msg_token,
4691 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4692 free_async_crq:
4693 free_page((unsigned long)async_q->msgs);
4694 nomem:
4695 LEAVE;
4696 return -ENOMEM;
4697 }
4698
4699 /**
4700 * ibmvfc_rport_add_thread - Worker thread for rport adds
4701 * @work: work struct
4702 *
4703 **/
4704 static void ibmvfc_rport_add_thread(struct work_struct *work)
4705 {
4706 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4707 rport_add_work_q);
4708 struct ibmvfc_target *tgt;
4709 struct fc_rport *rport;
4710 unsigned long flags;
4711 int did_work;
4712
4713 ENTER;
4714 spin_lock_irqsave(vhost->host->host_lock, flags);
4715 do {
4716 did_work = 0;
4717 if (vhost->state != IBMVFC_ACTIVE)
4718 break;
4719
4720 list_for_each_entry(tgt, &vhost->targets, queue) {
4721 if (tgt->add_rport) {
4722 did_work = 1;
4723 tgt->add_rport = 0;
4724 kref_get(&tgt->kref);
4725 rport = tgt->rport;
4726 if (!rport) {
4727 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4728 ibmvfc_tgt_add_rport(tgt);
4729 } else if (get_device(&rport->dev)) {
4730 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4731 tgt_dbg(tgt, "Setting rport roles\n");
4732 fc_remote_port_rolechg(rport, tgt->ids.roles);
4733 put_device(&rport->dev);
4734 } else {
4735 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4736 }
4737
4738 kref_put(&tgt->kref, ibmvfc_release_tgt);
4739 spin_lock_irqsave(vhost->host->host_lock, flags);
4740 break;
4741 }
4742 }
4743 } while(did_work);
4744
4745 if (vhost->state == IBMVFC_ACTIVE)
4746 vhost->scan_complete = 1;
4747 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4748 LEAVE;
4749 }
4750
4751 /**
4752 * ibmvfc_probe - Adapter hot plug add entry point
4753 * @vdev: vio device struct
4754 * @id: vio device id struct
4755 *
4756 * Return value:
4757 * 0 on success / non-zero on failure
4758 **/
4759 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4760 {
4761 struct ibmvfc_host *vhost;
4762 struct Scsi_Host *shost;
4763 struct device *dev = &vdev->dev;
4764 int rc = -ENOMEM;
4765
4766 ENTER;
4767 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4768 if (!shost) {
4769 dev_err(dev, "Couldn't allocate host data\n");
4770 goto out;
4771 }
4772
4773 shost->transportt = ibmvfc_transport_template;
4774 shost->can_queue = max_requests;
4775 shost->max_lun = max_lun;
4776 shost->max_id = max_targets;
4777 shost->max_sectors = IBMVFC_MAX_SECTORS;
4778 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4779 shost->unique_id = shost->host_no;
4780
4781 vhost = shost_priv(shost);
4782 INIT_LIST_HEAD(&vhost->sent);
4783 INIT_LIST_HEAD(&vhost->free);
4784 INIT_LIST_HEAD(&vhost->targets);
4785 sprintf(vhost->name, IBMVFC_NAME);
4786 vhost->host = shost;
4787 vhost->dev = dev;
4788 vhost->partition_number = -1;
4789 vhost->log_level = log_level;
4790 vhost->task_set = 1;
4791 strcpy(vhost->partition_name, "UNKNOWN");
4792 init_waitqueue_head(&vhost->work_wait_q);
4793 init_waitqueue_head(&vhost->init_wait_q);
4794 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
4795 mutex_init(&vhost->passthru_mutex);
4796
4797 if ((rc = ibmvfc_alloc_mem(vhost)))
4798 goto free_scsi_host;
4799
4800 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4801 shost->host_no);
4802
4803 if (IS_ERR(vhost->work_thread)) {
4804 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4805 PTR_ERR(vhost->work_thread));
4806 goto free_host_mem;
4807 }
4808
4809 if ((rc = ibmvfc_init_crq(vhost))) {
4810 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4811 goto kill_kthread;
4812 }
4813
4814 if ((rc = ibmvfc_init_event_pool(vhost))) {
4815 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4816 goto release_crq;
4817 }
4818
4819 if ((rc = scsi_add_host(shost, dev)))
4820 goto release_event_pool;
4821
4822 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4823
4824 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4825 &ibmvfc_trace_attr))) {
4826 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4827 goto remove_shost;
4828 }
4829
4830 if (shost_to_fc_host(shost)->rqst_q)
4831 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
4832 dev_set_drvdata(dev, vhost);
4833 spin_lock(&ibmvfc_driver_lock);
4834 list_add_tail(&vhost->queue, &ibmvfc_head);
4835 spin_unlock(&ibmvfc_driver_lock);
4836
4837 ibmvfc_send_crq_init(vhost);
4838 scsi_scan_host(shost);
4839 return 0;
4840
4841 remove_shost:
4842 scsi_remove_host(shost);
4843 release_event_pool:
4844 ibmvfc_free_event_pool(vhost);
4845 release_crq:
4846 ibmvfc_release_crq_queue(vhost);
4847 kill_kthread:
4848 kthread_stop(vhost->work_thread);
4849 free_host_mem:
4850 ibmvfc_free_mem(vhost);
4851 free_scsi_host:
4852 scsi_host_put(shost);
4853 out:
4854 LEAVE;
4855 return rc;
4856 }
4857
4858 /**
4859 * ibmvfc_remove - Adapter hot plug remove entry point
4860 * @vdev: vio device struct
4861 *
4862 * Return value:
4863 * 0
4864 **/
4865 static int ibmvfc_remove(struct vio_dev *vdev)
4866 {
4867 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4868 unsigned long flags;
4869
4870 ENTER;
4871 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
4872
4873 spin_lock_irqsave(vhost->host->host_lock, flags);
4874 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4875 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4876
4877 ibmvfc_wait_while_resetting(vhost);
4878 ibmvfc_release_crq_queue(vhost);
4879 kthread_stop(vhost->work_thread);
4880 fc_remove_host(vhost->host);
4881 scsi_remove_host(vhost->host);
4882
4883 spin_lock_irqsave(vhost->host->host_lock, flags);
4884 ibmvfc_purge_requests(vhost, DID_ERROR);
4885 ibmvfc_free_event_pool(vhost);
4886 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4887
4888 ibmvfc_free_mem(vhost);
4889 spin_lock(&ibmvfc_driver_lock);
4890 list_del(&vhost->queue);
4891 spin_unlock(&ibmvfc_driver_lock);
4892 scsi_host_put(vhost->host);
4893 LEAVE;
4894 return 0;
4895 }
4896
4897 /**
4898 * ibmvfc_resume - Resume from suspend
4899 * @dev: device struct
4900 *
4901 * We may have lost an interrupt across suspend/resume, so kick the
4902 * interrupt handler
4903 *
4904 */
4905 static int ibmvfc_resume(struct device *dev)
4906 {
4907 unsigned long flags;
4908 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4909 struct vio_dev *vdev = to_vio_dev(dev);
4910
4911 spin_lock_irqsave(vhost->host->host_lock, flags);
4912 vio_disable_interrupts(vdev);
4913 tasklet_schedule(&vhost->tasklet);
4914 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4915 return 0;
4916 }
4917
4918 /**
4919 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4920 * @vdev: vio device struct
4921 *
4922 * Return value:
4923 * Number of bytes the driver will need to DMA map at the same time in
4924 * order to perform well.
4925 */
4926 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4927 {
4928 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4929 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4930 }
4931
4932 static struct vio_device_id ibmvfc_device_table[] = {
4933 {"fcp", "IBM,vfc-client"},
4934 { "", "" }
4935 };
4936 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4937
4938 static const struct dev_pm_ops ibmvfc_pm_ops = {
4939 .resume = ibmvfc_resume
4940 };
4941
4942 static struct vio_driver ibmvfc_driver = {
4943 .id_table = ibmvfc_device_table,
4944 .probe = ibmvfc_probe,
4945 .remove = ibmvfc_remove,
4946 .get_desired_dma = ibmvfc_get_desired_dma,
4947 .name = IBMVFC_NAME,
4948 .pm = &ibmvfc_pm_ops,
4949 };
4950
4951 static struct fc_function_template ibmvfc_transport_functions = {
4952 .show_host_fabric_name = 1,
4953 .show_host_node_name = 1,
4954 .show_host_port_name = 1,
4955 .show_host_supported_classes = 1,
4956 .show_host_port_type = 1,
4957 .show_host_port_id = 1,
4958 .show_host_maxframe_size = 1,
4959
4960 .get_host_port_state = ibmvfc_get_host_port_state,
4961 .show_host_port_state = 1,
4962
4963 .get_host_speed = ibmvfc_get_host_speed,
4964 .show_host_speed = 1,
4965
4966 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4967 .terminate_rport_io = ibmvfc_terminate_rport_io,
4968
4969 .show_rport_maxframe_size = 1,
4970 .show_rport_supported_classes = 1,
4971
4972 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4973 .show_rport_dev_loss_tmo = 1,
4974
4975 .get_starget_node_name = ibmvfc_get_starget_node_name,
4976 .show_starget_node_name = 1,
4977
4978 .get_starget_port_name = ibmvfc_get_starget_port_name,
4979 .show_starget_port_name = 1,
4980
4981 .get_starget_port_id = ibmvfc_get_starget_port_id,
4982 .show_starget_port_id = 1,
4983
4984 .bsg_request = ibmvfc_bsg_request,
4985 .bsg_timeout = ibmvfc_bsg_timeout,
4986 };
4987
4988 /**
4989 * ibmvfc_module_init - Initialize the ibmvfc module
4990 *
4991 * Return value:
4992 * 0 on success / other on failure
4993 **/
4994 static int __init ibmvfc_module_init(void)
4995 {
4996 int rc;
4997
4998 if (!firmware_has_feature(FW_FEATURE_VIO))
4999 return -ENODEV;
5000
5001 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
5002 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
5003
5004 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
5005 if (!ibmvfc_transport_template)
5006 return -ENOMEM;
5007
5008 rc = vio_register_driver(&ibmvfc_driver);
5009 if (rc)
5010 fc_release_transport(ibmvfc_transport_template);
5011 return rc;
5012 }
5013
5014 /**
5015 * ibmvfc_module_exit - Teardown the ibmvfc module
5016 *
5017 * Return value:
5018 * nothing
5019 **/
5020 static void __exit ibmvfc_module_exit(void)
5021 {
5022 vio_unregister_driver(&ibmvfc_driver);
5023 fc_release_transport(ibmvfc_transport_template);
5024 }
5025
5026 module_init(ibmvfc_module_init);
5027 module_exit(ibmvfc_module_exit);
Linux with added FPC-III support