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[SCSI] ibmvfc: Add details to async event log
[net-next-2.6.git] / drivers / scsi / ibmvscsi / ibmvfc.c
CommitLineData
072b91f9
BK		 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/of.h>
32#include <linux/stringify.h>
33#include <asm/firmware.h>
34#include <asm/irq.h>
35#include <asm/vio.h>
36#include <scsi/scsi.h>
37#include <scsi/scsi_cmnd.h>
38#include <scsi/scsi_host.h>
39#include <scsi/scsi_device.h>
40#include <scsi/scsi_tcq.h>
41#include <scsi/scsi_transport_fc.h>
42#include "ibmvfc.h"
43
44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
46static unsigned int max_lun = IBMVFC_MAX_LUN;
47static unsigned int max_targets = IBMVFC_MAX_TARGETS;
48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
51static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
53static LIST_HEAD(ibmvfc_head);
54static DEFINE_SPINLOCK(ibmvfc_driver_lock);
55static struct scsi_transport_template *ibmvfc_transport_template;
56
57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59MODULE_LICENSE("GPL");
60MODULE_VERSION(IBMVFC_DRIVER_VERSION);
61
62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
66MODULE_PARM_DESC(default_timeout,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
69module_param_named(max_requests, max_requests, uint, S_IRUGO);
70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
72module_param_named(max_lun, max_lun, uint, S_IRUGO);
73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
75module_param_named(max_targets, max_targets, uint, S_IRUGO);
76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
78module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR);
79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
82MODULE_PARM_DESC(debug, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG) "]");
84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
89module_param_named(log_level, log_level, uint, 0);
90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
92
93static const struct {
94 u16 status;
95 u16 error;
96 u8 result;
97 u8 retry;
98 int log;
99 char *name;
100} cmd_status [] = {
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
115
116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
125
126 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
130 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
131 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
132 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
134 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
135 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
136 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
137
138 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
139};
140
141static void ibmvfc_npiv_login(struct ibmvfc_host *);
142static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
143static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
144static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
145
146static const char *unknown_error = "unknown error";
147
148#ifdef CONFIG_SCSI_IBMVFC_TRACE
149/**
150 * ibmvfc_trc_start - Log a start trace entry
151 * @evt: ibmvfc event struct
152 *
153 **/
154static void ibmvfc_trc_start(struct ibmvfc_event *evt)
155{
156 struct ibmvfc_host *vhost = evt->vhost;
157 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
158 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
159 struct ibmvfc_trace_entry *entry;
160
161 entry = &vhost->trace[vhost->trace_index++];
162 entry->evt = evt;
163 entry->time = jiffies;
164 entry->fmt = evt->crq.format;
165 entry->type = IBMVFC_TRC_START;
166
167 switch (entry->fmt) {
168 case IBMVFC_CMD_FORMAT:
169 entry->op_code = vfc_cmd->iu.cdb[0];
170 entry->scsi_id = vfc_cmd->tgt_scsi_id;
171 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
172 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
173 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
174 break;
175 case IBMVFC_MAD_FORMAT:
176 entry->op_code = mad->opcode;
177 break;
178 default:
179 break;
180 };
181}
182
183/**
184 * ibmvfc_trc_end - Log an end trace entry
185 * @evt: ibmvfc event struct
186 *
187 **/
188static void ibmvfc_trc_end(struct ibmvfc_event *evt)
189{
190 struct ibmvfc_host *vhost = evt->vhost;
191 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
192 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
193 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
194
195 entry->evt = evt;
196 entry->time = jiffies;
197 entry->fmt = evt->crq.format;
198 entry->type = IBMVFC_TRC_END;
199
200 switch (entry->fmt) {
201 case IBMVFC_CMD_FORMAT:
202 entry->op_code = vfc_cmd->iu.cdb[0];
203 entry->scsi_id = vfc_cmd->tgt_scsi_id;
204 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
205 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
206 entry->u.end.status = vfc_cmd->status;
207 entry->u.end.error = vfc_cmd->error;
208 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
209 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
210 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
211 break;
212 case IBMVFC_MAD_FORMAT:
213 entry->op_code = mad->opcode;
214 entry->u.end.status = mad->status;
215 break;
216 default:
217 break;
218
219 };
220}
221
222#else
223#define ibmvfc_trc_start(evt) do { } while (0)
224#define ibmvfc_trc_end(evt) do { } while (0)
225#endif
226
227/**
228 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
229 * @status: status / error class
230 * @error: error
231 *
232 * Return value:
233 * index into cmd_status / -EINVAL on failure
234 **/
235static int ibmvfc_get_err_index(u16 status, u16 error)
236{
237 int i;
238
239 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
240 if ((cmd_status[i].status & status) == cmd_status[i].status &&
241 cmd_status[i].error == error)
242 return i;
243
244 return -EINVAL;
245}
246
247/**
248 * ibmvfc_get_cmd_error - Find the error description for the fcp response
249 * @status: status / error class
250 * @error: error
251 *
252 * Return value:
253 * error description string
254 **/
255static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
256{
257 int rc = ibmvfc_get_err_index(status, error);
258 if (rc >= 0)
259 return cmd_status[rc].name;
260 return unknown_error;
261}
262
263/**
264 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
265 * @vfc_cmd: ibmvfc command struct
266 *
267 * Return value:
268 * SCSI result value to return for completed command
269 **/
270static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
271{
272 int err;
273 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
274 int fc_rsp_len = rsp->fcp_rsp_len;
275
276 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
277 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
278 rsp->data.info.rsp_code))
279 return DID_ERROR << 16;
280
281 if (!vfc_cmd->status) {
282 if (rsp->flags & FCP_RESID_OVER)
283 return rsp->scsi_status | (DID_ERROR << 16);
284 else
285 return rsp->scsi_status | (DID_OK << 16);
286 }
287
288 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
289 if (err >= 0)
290 return rsp->scsi_status | (cmd_status[err].result << 16);
291 return rsp->scsi_status | (DID_ERROR << 16);
292}
293
294/**
295 * ibmvfc_retry_cmd - Determine if error status is retryable
296 * @status: status / error class
297 * @error: error
298 *
299 * Return value:
300 * 1 if error should be retried / 0 if it should not
301 **/
302static int ibmvfc_retry_cmd(u16 status, u16 error)
303{
304 int rc = ibmvfc_get_err_index(status, error);
305
306 if (rc >= 0)
307 return cmd_status[rc].retry;
308 return 1;
309}
310
311static const char *unknown_fc_explain = "unknown fc explain";
312
313static const struct {
314 u16 fc_explain;
315 char *name;
316} ls_explain [] = {
317 { 0x00, "no additional explanation" },
318 { 0x01, "service parameter error - options" },
319 { 0x03, "service parameter error - initiator control" },
320 { 0x05, "service parameter error - recipient control" },
321 { 0x07, "service parameter error - received data field size" },
322 { 0x09, "service parameter error - concurrent seq" },
323 { 0x0B, "service parameter error - credit" },
324 { 0x0D, "invalid N_Port/F_Port_Name" },
325 { 0x0E, "invalid node/Fabric Name" },
326 { 0x0F, "invalid common service parameters" },
327 { 0x11, "invalid association header" },
328 { 0x13, "association header required" },
329 { 0x15, "invalid originator S_ID" },
330 { 0x17, "invalid OX_ID-RX-ID combination" },
331 { 0x19, "command (request) already in progress" },
332 { 0x1E, "N_Port Login requested" },
333 { 0x1F, "Invalid N_Port_ID" },
334};
335
336static const struct {
337 u16 fc_explain;
338 char *name;
339} gs_explain [] = {
340 { 0x00, "no additional explanation" },
341 { 0x01, "port identifier not registered" },
342 { 0x02, "port name not registered" },
343 { 0x03, "node name not registered" },
344 { 0x04, "class of service not registered" },
345 { 0x06, "initial process associator not registered" },
346 { 0x07, "FC-4 TYPEs not registered" },
347 { 0x08, "symbolic port name not registered" },
348 { 0x09, "symbolic node name not registered" },
349 { 0x0A, "port type not registered" },
350 { 0xF0, "authorization exception" },
351 { 0xF1, "authentication exception" },
352 { 0xF2, "data base full" },
353 { 0xF3, "data base empty" },
354 { 0xF4, "processing request" },
355 { 0xF5, "unable to verify connection" },
356 { 0xF6, "devices not in a common zone" },
357};
358
359/**
360 * ibmvfc_get_ls_explain - Return the FC Explain description text
361 * @status: FC Explain status
362 *
363 * Returns:
364 * error string
365 **/
366static const char *ibmvfc_get_ls_explain(u16 status)
367{
368 int i;
369
370 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
371 if (ls_explain[i].fc_explain == status)
372 return ls_explain[i].name;
373
374 return unknown_fc_explain;
375}
376
377/**
378 * ibmvfc_get_gs_explain - Return the FC Explain description text
379 * @status: FC Explain status
380 *
381 * Returns:
382 * error string
383 **/
384static const char *ibmvfc_get_gs_explain(u16 status)
385{
386 int i;
387
388 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
389 if (gs_explain[i].fc_explain == status)
390 return gs_explain[i].name;
391
392 return unknown_fc_explain;
393}
394
395static const struct {
396 enum ibmvfc_fc_type fc_type;
397 char *name;
398} fc_type [] = {
399 { IBMVFC_FABRIC_REJECT, "fabric reject" },
400 { IBMVFC_PORT_REJECT, "port reject" },
401 { IBMVFC_LS_REJECT, "ELS reject" },
402 { IBMVFC_FABRIC_BUSY, "fabric busy" },
403 { IBMVFC_PORT_BUSY, "port busy" },
404 { IBMVFC_BASIC_REJECT, "basic reject" },
405};
406
407static const char *unknown_fc_type = "unknown fc type";
408
409/**
410 * ibmvfc_get_fc_type - Return the FC Type description text
411 * @status: FC Type error status
412 *
413 * Returns:
414 * error string
415 **/
416static const char *ibmvfc_get_fc_type(u16 status)
417{
418 int i;
419
420 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
421 if (fc_type[i].fc_type == status)
422 return fc_type[i].name;
423
424 return unknown_fc_type;
425}
426
427/**
428 * ibmvfc_set_tgt_action - Set the next init action for the target
429 * @tgt: ibmvfc target struct
430 * @action: action to perform
431 *
432 **/
433static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
434 enum ibmvfc_target_action action)
435{
436 switch (tgt->action) {
437 case IBMVFC_TGT_ACTION_DEL_RPORT:
438 break;
439 default:
440 tgt->action = action;
441 break;
442 }
443}
444
445/**
446 * ibmvfc_set_host_state - Set the state for the host
447 * @vhost: ibmvfc host struct
448 * @state: state to set host to
449 *
450 * Returns:
451 * 0 if state changed / non-zero if not changed
452 **/
453static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
454 enum ibmvfc_host_state state)
455{
456 int rc = 0;
457
458 switch (vhost->state) {
459 case IBMVFC_HOST_OFFLINE:
460 rc = -EINVAL;
461 break;
462 default:
463 vhost->state = state;
464 break;
465 };
466
467 return rc;
468}
469
470/**
471 * ibmvfc_set_host_action - Set the next init action for the host
472 * @vhost: ibmvfc host struct
473 * @action: action to perform
474 *
475 **/
476static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
477 enum ibmvfc_host_action action)
478{
479 switch (action) {
480 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
481 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
482 vhost->action = action;
483 break;
484 case IBMVFC_HOST_ACTION_INIT_WAIT:
485 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
486 vhost->action = action;
487 break;
488 case IBMVFC_HOST_ACTION_QUERY:
489 switch (vhost->action) {
490 case IBMVFC_HOST_ACTION_INIT_WAIT:
491 case IBMVFC_HOST_ACTION_NONE:
492 case IBMVFC_HOST_ACTION_TGT_ADD:
493 vhost->action = action;
494 break;
495 default:
496 break;
497 };
498 break;
499 case IBMVFC_HOST_ACTION_TGT_INIT:
500 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
501 vhost->action = action;
502 break;
503 case IBMVFC_HOST_ACTION_INIT:
504 case IBMVFC_HOST_ACTION_TGT_DEL:
505 case IBMVFC_HOST_ACTION_QUERY_TGTS:
506 case IBMVFC_HOST_ACTION_TGT_ADD:
507 case IBMVFC_HOST_ACTION_NONE:
508 default:
509 vhost->action = action;
510 break;
511 };
512}
513
514/**
515 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
516 * @vhost: ibmvfc host struct
517 *
518 * Return value:
519 * nothing
520 **/
521static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
522{
523 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 524 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
525 scsi_block_requests(vhost->host);
526 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
527 }
072b91f9
BK		 528 } else
529 vhost->reinit = 1;
530
531 wake_up(&vhost->work_wait_q);
532}
533
534/**
535 * ibmvfc_link_down - Handle a link down event from the adapter
536 * @vhost: ibmvfc host struct
537 * @state: ibmvfc host state to enter
538 *
539 **/
540static void ibmvfc_link_down(struct ibmvfc_host *vhost,
541 enum ibmvfc_host_state state)
542{
543 struct ibmvfc_target *tgt;
544
545 ENTER;
546 scsi_block_requests(vhost->host);
547 list_for_each_entry(tgt, &vhost->targets, queue)
548 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
549 ibmvfc_set_host_state(vhost, state);
550 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
551 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
552 wake_up(&vhost->work_wait_q);
553 LEAVE;
554}
555
556/**
557 * ibmvfc_init_host - Start host initialization
558 * @vhost: ibmvfc host struct
cf6f10d7 559 * @relogin: is this a re-login?
072b91f9
BK		 560 *
561 * Return value:
562 * nothing
563 **/
cf6f10d7 564static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
072b91f9
BK		 565{
566 struct ibmvfc_target *tgt;
567
568 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
569 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
570 dev_err(vhost->dev,
571 "Host initialization retries exceeded. Taking adapter offline\n");
572 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
573 return;
574 }
575 }
576
577 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
cf6f10d7
BK		 578 if (!relogin) {
579 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
580 vhost->async_crq.cur = 0;
581 }
582
072b91f9
BK		 583 list_for_each_entry(tgt, &vhost->targets, queue)
584 tgt->need_login = 1;
585 scsi_block_requests(vhost->host);
586 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
587 vhost->job_step = ibmvfc_npiv_login;
588 wake_up(&vhost->work_wait_q);
589 }
590}
591
592/**
593 * ibmvfc_send_crq - Send a CRQ
594 * @vhost: ibmvfc host struct
595 * @word1: the first 64 bits of the data
596 * @word2: the second 64 bits of the data
597 *
598 * Return value:
599 * 0 on success / other on failure
600 **/
601static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
602{
603 struct vio_dev *vdev = to_vio_dev(vhost->dev);
604 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
605}
606
607/**
608 * ibmvfc_send_crq_init - Send a CRQ init message
609 * @vhost: ibmvfc host struct
610 *
611 * Return value:
612 * 0 on success / other on failure
613 **/
614static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
615{
616 ibmvfc_dbg(vhost, "Sending CRQ init\n");
617 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
618}
619
620/**
621 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
622 * @vhost: ibmvfc host struct
623 *
624 * Return value:
625 * 0 on success / other on failure
626 **/
627static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
628{
629 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
630 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
631}
632
633/**
634 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
635 * @vhost: ibmvfc host struct
636 *
637 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
638 * the crq with the hypervisor.
639 **/
640static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
641{
642 long rc;
643 struct vio_dev *vdev = to_vio_dev(vhost->dev);
644 struct ibmvfc_crq_queue *crq = &vhost->crq;
645
646 ibmvfc_dbg(vhost, "Releasing CRQ\n");
647 free_irq(vdev->irq, vhost);
648 do {
649 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
650 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
651
652 vhost->state = IBMVFC_NO_CRQ;
653 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
654 free_page((unsigned long)crq->msgs);
655}
656
657/**
658 * ibmvfc_reenable_crq_queue - reenables the CRQ
659 * @vhost: ibmvfc host struct
660 *
661 * Return value:
662 * 0 on success / other on failure
663 **/
664static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
665{
666 int rc;
667 struct vio_dev *vdev = to_vio_dev(vhost->dev);
668
669 /* Re-enable the CRQ */
670 do {
671 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
672 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
673
674 if (rc)
675 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
676
677 return rc;
678}
679
680/**
681 * ibmvfc_reset_crq - resets a crq after a failure
682 * @vhost: ibmvfc host struct
683 *
684 * Return value:
685 * 0 on success / other on failure
686 **/
687static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
688{
689 int rc;
690 struct vio_dev *vdev = to_vio_dev(vhost->dev);
691 struct ibmvfc_crq_queue *crq = &vhost->crq;
692
693 /* Close the CRQ */
694 do {
695 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
696 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
697
698 vhost->state = IBMVFC_NO_CRQ;
699 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
700
701 /* Clean out the queue */
702 memset(crq->msgs, 0, PAGE_SIZE);
703 crq->cur = 0;
704
705 /* And re-open it again */
706 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
707 crq->msg_token, PAGE_SIZE);
708
709 if (rc == H_CLOSED)
710 /* Adapter is good, but other end is not ready */
711 dev_warn(vhost->dev, "Partner adapter not ready\n");
712 else if (rc != 0)
713 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
714
715 return rc;
716}
717
718/**
719 * ibmvfc_valid_event - Determines if event is valid.
720 * @pool: event_pool that contains the event
721 * @evt: ibmvfc event to be checked for validity
722 *
723 * Return value:
724 * 1 if event is valid / 0 if event is not valid
725 **/
726static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
727 struct ibmvfc_event *evt)
728{
729 int index = evt - pool->events;
730 if (index < 0 || index >= pool->size) /* outside of bounds */
731 return 0;
732 if (evt != pool->events + index) /* unaligned */
733 return 0;
734 return 1;
735}
736
737/**
738 * ibmvfc_free_event - Free the specified event
739 * @evt: ibmvfc_event to be freed
740 *
741 **/
742static void ibmvfc_free_event(struct ibmvfc_event *evt)
743{
744 struct ibmvfc_host *vhost = evt->vhost;
745 struct ibmvfc_event_pool *pool = &vhost->pool;
746
747 BUG_ON(!ibmvfc_valid_event(pool, evt));
748 BUG_ON(atomic_inc_return(&evt->free) != 1);
749 list_add_tail(&evt->queue, &vhost->free);
750}
751
752/**
753 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
754 * @evt: ibmvfc event struct
755 *
756 * This function does not setup any error status, that must be done
757 * before this function gets called.
758 **/
759static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
760{
761 struct scsi_cmnd *cmnd = evt->cmnd;
762
763 if (cmnd) {
764 scsi_dma_unmap(cmnd);
765 cmnd->scsi_done(cmnd);
766 }
767
768 ibmvfc_free_event(evt);
769}
770
771/**
772 * ibmvfc_fail_request - Fail request with specified error code
773 * @evt: ibmvfc event struct
774 * @error_code: error code to fail request with
775 *
776 * Return value:
777 * none
778 **/
779static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
780{
781 if (evt->cmnd) {
782 evt->cmnd->result = (error_code << 16);
783 evt->done = ibmvfc_scsi_eh_done;
784 } else
785 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
786
787 list_del(&evt->queue);
788 del_timer(&evt->timer);
789 ibmvfc_trc_end(evt);
790 evt->done(evt);
791}
792
793/**
794 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
795 * @vhost: ibmvfc host struct
796 * @error_code: error code to fail requests with
797 *
798 * Return value:
799 * none
800 **/
801static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
802{
803 struct ibmvfc_event *evt, *pos;
804
805 ibmvfc_dbg(vhost, "Purging all requests\n");
806 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
807 ibmvfc_fail_request(evt, error_code);
808}
809
810/**
811 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
812 * @vhost: struct ibmvfc host to reset
813 **/
814static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
815{
816 int rc;
817
818 scsi_block_requests(vhost->host);
819 ibmvfc_purge_requests(vhost, DID_ERROR);
820 if ((rc = ibmvfc_reset_crq(vhost)) ||
821 (rc = ibmvfc_send_crq_init(vhost)) ||
822 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
823 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
824 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
825 } else
826 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
827}
828
829/**
830 * ibmvfc_reset_host - Reset the connection to the server
831 * @vhost: struct ibmvfc host to reset
832 **/
833static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
834{
835 unsigned long flags;
836
837 spin_lock_irqsave(vhost->host->host_lock, flags);
838 __ibmvfc_reset_host(vhost);
839 spin_unlock_irqrestore(vhost->host->host_lock, flags);
840}
841
842/**
843 * ibmvfc_retry_host_init - Retry host initialization if allowed
844 * @vhost: ibmvfc host struct
845 *
846 **/
847static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
848{
849 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
850 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
851 dev_err(vhost->dev,
852 "Host initialization retries exceeded. Taking adapter offline\n");
853 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
854 } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES)
855 __ibmvfc_reset_host(vhost);
856 else
857 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
858 }
859
860 wake_up(&vhost->work_wait_q);
861}
862
863/**
b3c10489 864 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 865 * @starget: scsi target struct
866 *
867 * Return value:
868 * ibmvfc_target struct / NULL if not found
869 **/
b3c10489 870static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 871{
872 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
873 struct ibmvfc_host *vhost = shost_priv(shost);
874 struct ibmvfc_target *tgt;
875
876 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 877 if (tgt->target_id == starget->id) {
878 kref_get(&tgt->kref);
072b91f9 879 return tgt;
b3c10489 880 }
072b91f9
BK		 881 return NULL;
882}
883
884/**
b3c10489 885 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 886 * @starget: scsi target struct
887 *
888 * Return value:
889 * ibmvfc_target struct / NULL if not found
890 **/
b3c10489 891static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 892{
893 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
894 struct ibmvfc_target *tgt;
895 unsigned long flags;
896
897 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 898 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 899 spin_unlock_irqrestore(shost->host_lock, flags);
900 return tgt;
901}
902
903/**
904 * ibmvfc_get_host_speed - Get host port speed
905 * @shost: scsi host struct
906 *
907 * Return value:
908 * none
909 **/
910static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
911{
912 struct ibmvfc_host *vhost = shost_priv(shost);
913 unsigned long flags;
914
915 spin_lock_irqsave(shost->host_lock, flags);
916 if (vhost->state == IBMVFC_ACTIVE) {
917 switch (vhost->login_buf->resp.link_speed / 100) {
918 case 1:
919 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
920 break;
921 case 2:
922 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
923 break;
924 case 4:
925 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
926 break;
927 case 8:
928 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
929 break;
930 case 10:
931 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
932 break;
933 case 16:
934 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
935 break;
936 default:
937 ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n",
938 vhost->login_buf->resp.link_speed / 100);
939 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
940 break;
941 }
942 } else
943 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
944 spin_unlock_irqrestore(shost->host_lock, flags);
945}
946
947/**
948 * ibmvfc_get_host_port_state - Get host port state
949 * @shost: scsi host struct
950 *
951 * Return value:
952 * none
953 **/
954static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
955{
956 struct ibmvfc_host *vhost = shost_priv(shost);
957 unsigned long flags;
958
959 spin_lock_irqsave(shost->host_lock, flags);
960 switch (vhost->state) {
961 case IBMVFC_INITIALIZING:
962 case IBMVFC_ACTIVE:
963 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
964 break;
965 case IBMVFC_LINK_DOWN:
966 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
967 break;
968 case IBMVFC_LINK_DEAD:
969 case IBMVFC_HOST_OFFLINE:
970 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
971 break;
972 case IBMVFC_HALTED:
973 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
974 break;
0ae808e0
BK		 975 case IBMVFC_NO_CRQ:
976 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
977 break;
072b91f9
BK		 978 default:
979 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
980 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
981 break;
982 }
983 spin_unlock_irqrestore(shost->host_lock, flags);
984}
985
986/**
987 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
988 * @rport: rport struct
989 * @timeout: timeout value
990 *
991 * Return value:
992 * none
993 **/
994static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
995{
996 if (timeout)
997 rport->dev_loss_tmo = timeout;
998 else
999 rport->dev_loss_tmo = 1;
1000}
1001
b3c10489
BK		 1002/**
1003 * ibmvfc_release_tgt - Free memory allocated for a target
1004 * @kref: kref struct
1005 *
1006 **/
1007static void ibmvfc_release_tgt(struct kref *kref)
1008{
1009 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1010 kfree(tgt);
1011}
1012
072b91f9
BK		 1013/**
1014 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1015 * @starget: scsi target struct
1016 *
1017 * Return value:
1018 * none
1019 **/
1020static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1021{
b3c10489 1022 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1023 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1024 if (tgt)
1025 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1026}
1027
1028/**
1029 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1030 * @starget: scsi target struct
1031 *
1032 * Return value:
1033 * none
1034 **/
1035static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1036{
b3c10489 1037 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1038 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1039 if (tgt)
1040 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1041}
1042
1043/**
1044 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1045 * @starget: scsi target struct
1046 *
1047 * Return value:
1048 * none
1049 **/
1050static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1051{
b3c10489 1052 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1053 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1054 if (tgt)
1055 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1056}
1057
1058/**
1059 * ibmvfc_wait_while_resetting - Wait while the host resets
1060 * @vhost: ibmvfc host struct
1061 *
1062 * Return value:
1063 * 0 on success / other on failure
1064 **/
1065static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1066{
1067 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1068 ((vhost->state == IBMVFC_ACTIVE ||
1069 vhost->state == IBMVFC_HOST_OFFLINE ||
1070 vhost->state == IBMVFC_LINK_DEAD) &&
1071 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1072 (init_timeout * HZ));
1073
1074 return timeout ? 0 : -EIO;
1075}
1076
1077/**
1078 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1079 * @shost: scsi host struct
1080 *
1081 * Return value:
1082 * 0 on success / other on failure
1083 **/
1084static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1085{
1086 struct ibmvfc_host *vhost = shost_priv(shost);
1087
1088 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1089 ibmvfc_reset_host(vhost);
1090 return ibmvfc_wait_while_resetting(vhost);
1091}
1092
1093/**
1094 * ibmvfc_gather_partition_info - Gather info about the LPAR
1095 *
1096 * Return value:
1097 * none
1098 **/
1099static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1100{
1101 struct device_node *rootdn;
1102 const char *name;
1103 const unsigned int *num;
1104
1105 rootdn = of_find_node_by_path("/");
1106 if (!rootdn)
1107 return;
1108
1109 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1110 if (name)
1111 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1112 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1113 if (num)
1114 vhost->partition_number = *num;
1115 of_node_put(rootdn);
1116}
1117
1118/**
1119 * ibmvfc_set_login_info - Setup info for NPIV login
1120 * @vhost: ibmvfc host struct
1121 *
1122 * Return value:
1123 * none
1124 **/
1125static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1126{
1127 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1128 struct device_node *of_node = vhost->dev->archdata.of_node;
1129 const char *location;
1130
1131 memset(login_info, 0, sizeof(*login_info));
1132
1133 login_info->ostype = IBMVFC_OS_LINUX;
1134 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1135 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1136 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1137 login_info->partition_num = vhost->partition_number;
1138 login_info->vfc_frame_version = 1;
1139 login_info->fcp_version = 3;
1140 if (vhost->client_migrated)
1141 login_info->flags = IBMVFC_CLIENT_MIGRATED;
1142
1143 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1144 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1145 login_info->async.va = vhost->async_crq.msg_token;
52d7e861 1146 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
072b91f9
BK		 1147 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1148 strncpy(login_info->device_name,
1149 vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME);
1150
1151 location = of_get_property(of_node, "ibm,loc-code", NULL);
1152 location = location ? location : vhost->dev->bus_id;
1153 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1154}
1155
1156/**
1157 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1158 * @vhost: ibmvfc host who owns the event pool
1159 *
1160 * Returns zero on success.
1161 **/
1162static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1163{
1164 int i;
1165 struct ibmvfc_event_pool *pool = &vhost->pool;
1166
1167 ENTER;
1168 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1169 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1170 if (!pool->events)
1171 return -ENOMEM;
1172
1173 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1174 pool->size * sizeof(*pool->iu_storage),
1175 &pool->iu_token, 0);
1176
1177 if (!pool->iu_storage) {
1178 kfree(pool->events);
1179 return -ENOMEM;
1180 }
1181
1182 for (i = 0; i < pool->size; ++i) {
1183 struct ibmvfc_event *evt = &pool->events[i];
1184 atomic_set(&evt->free, 1);
1185 evt->crq.valid = 0x80;
1186 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1187 evt->xfer_iu = pool->iu_storage + i;
1188 evt->vhost = vhost;
1189 evt->ext_list = NULL;
1190 list_add_tail(&evt->queue, &vhost->free);
1191 }
1192
1193 LEAVE;
1194 return 0;
1195}
1196
1197/**
1198 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1199 * @vhost: ibmvfc host who owns the event pool
1200 *
1201 **/
1202static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1203{
1204 int i;
1205 struct ibmvfc_event_pool *pool = &vhost->pool;
1206
1207 ENTER;
1208 for (i = 0; i < pool->size; ++i) {
1209 list_del(&pool->events[i].queue);
1210 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1211 if (pool->events[i].ext_list)
1212 dma_pool_free(vhost->sg_pool,
1213 pool->events[i].ext_list,
1214 pool->events[i].ext_list_token);
1215 }
1216
1217 kfree(pool->events);
1218 dma_free_coherent(vhost->dev,
1219 pool->size * sizeof(*pool->iu_storage),
1220 pool->iu_storage, pool->iu_token);
1221 LEAVE;
1222}
1223
1224/**
1225 * ibmvfc_get_event - Gets the next free event in pool
1226 * @vhost: ibmvfc host struct
1227 *
1228 * Returns a free event from the pool.
1229 **/
1230static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1231{
1232 struct ibmvfc_event *evt;
1233
1234 BUG_ON(list_empty(&vhost->free));
1235 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1236 atomic_set(&evt->free, 0);
1237 list_del(&evt->queue);
1238 return evt;
1239}
1240
1241/**
1242 * ibmvfc_init_event - Initialize fields in an event struct that are always
1243 * required.
1244 * @evt: The event
1245 * @done: Routine to call when the event is responded to
1246 * @format: SRP or MAD format
1247 **/
1248static void ibmvfc_init_event(struct ibmvfc_event *evt,
1249 void (*done) (struct ibmvfc_event *), u8 format)
1250{
1251 evt->cmnd = NULL;
1252 evt->sync_iu = NULL;
1253 evt->crq.format = format;
1254 evt->done = done;
1255}
1256
1257/**
1258 * ibmvfc_map_sg_list - Initialize scatterlist
1259 * @scmd: scsi command struct
1260 * @nseg: number of scatterlist segments
1261 * @md: memory descriptor list to initialize
1262 **/
1263static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1264 struct srp_direct_buf *md)
1265{
1266 int i;
1267 struct scatterlist *sg;
1268
1269 scsi_for_each_sg(scmd, sg, nseg, i) {
1270 md[i].va = sg_dma_address(sg);
1271 md[i].len = sg_dma_len(sg);
1272 md[i].key = 0;
1273 }
1274}
1275
1276/**
1277 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1278 * @scmd: Scsi_Cmnd with the scatterlist
1279 * @evt: ibmvfc event struct
1280 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1281 * @dev: device for which to map dma memory
1282 *
1283 * Returns:
1284 * 0 on success / non-zero on failure
1285 **/
1286static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1287 struct ibmvfc_event *evt,
1288 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1289{
1290
1291 int sg_mapped;
1292 struct srp_direct_buf *data = &vfc_cmd->ioba;
1293 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1294
1295 sg_mapped = scsi_dma_map(scmd);
1296 if (!sg_mapped) {
1297 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1298 return 0;
1299 } else if (unlikely(sg_mapped < 0)) {
1300 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1301 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1302 return sg_mapped;
1303 }
1304
1305 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1306 vfc_cmd->flags |= IBMVFC_WRITE;
1307 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1308 } else {
1309 vfc_cmd->flags |= IBMVFC_READ;
1310 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1311 }
1312
1313 if (sg_mapped == 1) {
1314 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1315 return 0;
1316 }
1317
1318 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1319
1320 if (!evt->ext_list) {
1321 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1322 &evt->ext_list_token);
1323
1324 if (!evt->ext_list) {
1325 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1326 return -ENOMEM;
1327 }
1328 }
1329
1330 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1331
1332 data->va = evt->ext_list_token;
1333 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1334 data->key = 0;
1335 return 0;
1336}
1337
1338/**
1339 * ibmvfc_timeout - Internal command timeout handler
1340 * @evt: struct ibmvfc_event that timed out
1341 *
1342 * Called when an internally generated command times out
1343 **/
1344static void ibmvfc_timeout(struct ibmvfc_event *evt)
1345{
1346 struct ibmvfc_host *vhost = evt->vhost;
1347 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1348 ibmvfc_reset_host(vhost);
1349}
1350
1351/**
1352 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1353 * @evt: event to be sent
1354 * @vhost: ibmvfc host struct
1355 * @timeout: timeout in seconds - 0 means do not time command
1356 *
1357 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1358 **/
1359static int ibmvfc_send_event(struct ibmvfc_event *evt,
1360 struct ibmvfc_host *vhost, unsigned long timeout)
1361{
1362 u64 *crq_as_u64 = (u64 *) &evt->crq;
1363 int rc;
1364
1365 /* Copy the IU into the transfer area */
1366 *evt->xfer_iu = evt->iu;
1367 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1368 evt->xfer_iu->cmd.tag = (u64)evt;
1369 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1370 evt->xfer_iu->mad_common.tag = (u64)evt;
1371 else
1372 BUG();
1373
1374 list_add_tail(&evt->queue, &vhost->sent);
1375 init_timer(&evt->timer);
1376
1377 if (timeout) {
1378 evt->timer.data = (unsigned long) evt;
1379 evt->timer.expires = jiffies + (timeout * HZ);
1380 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1381 add_timer(&evt->timer);
1382 }
1383
1384 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1385 list_del(&evt->queue);
1386 del_timer(&evt->timer);
1387
1388 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1389 * Firmware will send a CRQ with a transport event (0xFF) to
1390 * tell this client what has happened to the transport. This
1391 * will be handled in ibmvfc_handle_crq()
1392 */
1393 if (rc == H_CLOSED) {
1394 if (printk_ratelimit())
1395 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1396 if (evt->cmnd)
1397 scsi_dma_unmap(evt->cmnd);
1398 ibmvfc_free_event(evt);
1399 return SCSI_MLQUEUE_HOST_BUSY;
1400 }
1401
1402 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1403 if (evt->cmnd) {
1404 evt->cmnd->result = DID_ERROR << 16;
1405 evt->done = ibmvfc_scsi_eh_done;
1406 } else
1407 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1408
1409 evt->done(evt);
1410 } else
1411 ibmvfc_trc_start(evt);
1412
1413 return 0;
1414}
1415
1416/**
1417 * ibmvfc_log_error - Log an error for the failed command if appropriate
1418 * @evt: ibmvfc event to log
1419 *
1420 **/
1421static void ibmvfc_log_error(struct ibmvfc_event *evt)
1422{
1423 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1424 struct ibmvfc_host *vhost = evt->vhost;
1425 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1426 struct scsi_cmnd *cmnd = evt->cmnd;
1427 const char *err = unknown_error;
1428 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1429 int logerr = 0;
1430 int rsp_code = 0;
1431
1432 if (index >= 0) {
1433 logerr = cmd_status[index].log;
1434 err = cmd_status[index].name;
1435 }
1436
0ae808e0 1437 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1438 return;
1439
1440 if (rsp->flags & FCP_RSP_LEN_VALID)
1441 rsp_code = rsp->data.info.rsp_code;
1442
1443 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1444 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1445 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1446 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1447}
1448
1449/**
1450 * ibmvfc_scsi_done - Handle responses from commands
1451 * @evt: ibmvfc event to be handled
1452 *
1453 * Used as a callback when sending scsi cmds.
1454 **/
1455static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1456{
1457 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1458 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1459 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d
BK		 1460 u32 rsp_len = 0;
1461 u32 sense_len = rsp->fcp_sense_len;
072b91f9
BK		 1462
1463 if (cmnd) {
1464 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1465 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1466 else if (rsp->flags & FCP_RESID_UNDER)
1467 scsi_set_resid(cmnd, rsp->fcp_resid);
1468 else
1469 scsi_set_resid(cmnd, 0);
1470
1471 if (vfc_cmd->status) {
1472 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1473
1474 if (rsp->flags & FCP_RSP_LEN_VALID)
1475 rsp_len = rsp->fcp_rsp_len;
1476 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1477 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1478 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9
BK		 1479 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1480
1481 ibmvfc_log_error(evt);
1482 }
1483
1484 if (!cmnd->result &&
1485 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1486 cmnd->result = (DID_ERROR << 16);
1487
1488 scsi_dma_unmap(cmnd);
1489 cmnd->scsi_done(cmnd);
1490 }
1491
1492 ibmvfc_free_event(evt);
1493}
1494
1495/**
1496 * ibmvfc_host_chkready - Check if the host can accept commands
1497 * @vhost: struct ibmvfc host
1498 *
1499 * Returns:
1500 * 1 if host can accept command / 0 if not
1501 **/
1502static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1503{
1504 int result = 0;
1505
1506 switch (vhost->state) {
1507 case IBMVFC_LINK_DEAD:
1508 case IBMVFC_HOST_OFFLINE:
1509 result = DID_NO_CONNECT << 16;
1510 break;
1511 case IBMVFC_NO_CRQ:
1512 case IBMVFC_INITIALIZING:
1513 case IBMVFC_HALTED:
1514 case IBMVFC_LINK_DOWN:
1515 result = DID_REQUEUE << 16;
1516 break;
1517 case IBMVFC_ACTIVE:
1518 result = 0;
1519 break;
1520 };
1521
1522 return result;
1523}
1524
1525/**
1526 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1527 * @cmnd: struct scsi_cmnd to be executed
1528 * @done: Callback function to be called when cmnd is completed
1529 *
1530 * Returns:
1531 * 0 on success / other on failure
1532 **/
1533static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1534 void (*done) (struct scsi_cmnd *))
1535{
1536 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1537 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1538 struct ibmvfc_cmd *vfc_cmd;
1539 struct ibmvfc_event *evt;
1540 u8 tag[2];
1541 int rc;
1542
1543 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1544 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1545 cmnd->result = rc;
1546 done(cmnd);
1547 return 0;
1548 }
1549
1550 cmnd->result = (DID_OK << 16);
1551 evt = ibmvfc_get_event(vhost);
1552 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1553 evt->cmnd = cmnd;
1554 cmnd->scsi_done = done;
1555 vfc_cmd = &evt->iu.cmd;
1556 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1557 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1558 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1559 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1560 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1561 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1562 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1563 vfc_cmd->tgt_scsi_id = rport->port_id;
1564 if ((rport->supported_classes & FC_COS_CLASS3) &&
1565 (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3))
1566 vfc_cmd->flags = IBMVFC_CLASS_3_ERR;
1567 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1568 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1569 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1570
1571 if (scsi_populate_tag_msg(cmnd, tag)) {
1572 vfc_cmd->task_tag = tag[1];
1573 switch (tag[0]) {
1574 case MSG_SIMPLE_TAG:
1575 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1576 break;
1577 case MSG_HEAD_TAG:
1578 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1579 break;
1580 case MSG_ORDERED_TAG:
1581 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1582 break;
1583 };
1584 }
1585
1586 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1587 return ibmvfc_send_event(evt, vhost, 0);
1588
1589 ibmvfc_free_event(evt);
1590 if (rc == -ENOMEM)
1591 return SCSI_MLQUEUE_HOST_BUSY;
1592
1593 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1594 scmd_printk(KERN_ERR, cmnd,
1595 "Failed to map DMA buffer for command. rc=%d\n", rc);
1596
1597 cmnd->result = DID_ERROR << 16;
1598 done(cmnd);
1599 return 0;
1600}
1601
1602/**
1603 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1604 * @evt: ibmvfc event struct
1605 *
1606 **/
1607static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1608{
1609 /* copy the response back */
1610 if (evt->sync_iu)
1611 *evt->sync_iu = *evt->xfer_iu;
1612
1613 complete(&evt->comp);
1614}
1615
1616/**
1617 * ibmvfc_reset_device - Reset the device with the specified reset type
1618 * @sdev: scsi device to reset
1619 * @type: reset type
1620 * @desc: reset type description for log messages
1621 *
1622 * Returns:
1623 * 0 on success / other on failure
1624 **/
1625static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1626{
1627 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1628 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1629 struct ibmvfc_cmd *tmf;
1630 struct ibmvfc_event *evt;
1631 union ibmvfc_iu rsp_iu;
1632 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1633 int rsp_rc = -EBUSY;
1634 unsigned long flags;
1635 int rsp_code = 0;
1636
1637 spin_lock_irqsave(vhost->host->host_lock, flags);
1638 if (vhost->state == IBMVFC_ACTIVE) {
1639 evt = ibmvfc_get_event(vhost);
1640 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1641
1642 tmf = &evt->iu.cmd;
1643 memset(tmf, 0, sizeof(*tmf));
1644 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1645 tmf->resp.len = sizeof(tmf->rsp);
1646 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1647 tmf->payload_len = sizeof(tmf->iu);
1648 tmf->resp_len = sizeof(tmf->rsp);
1649 tmf->cancel_key = (unsigned long)sdev->hostdata;
1650 tmf->tgt_scsi_id = rport->port_id;
1651 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1652 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1653 tmf->iu.tmf_flags = type;
1654 evt->sync_iu = &rsp_iu;
1655
1656 init_completion(&evt->comp);
1657 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1658 }
1659 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1660
1661 if (rsp_rc != 0) {
1662 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1663 desc, rsp_rc);
1664 return -EIO;
1665 }
1666
1667 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1668 wait_for_completion(&evt->comp);
1669
1670 if (rsp_iu.cmd.status) {
1671 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1672 rsp_code = fc_rsp->data.info.rsp_code;
1673
1674 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1675 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1676 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1677 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1678 fc_rsp->scsi_status);
1679 rsp_rc = -EIO;
1680 } else
1681 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1682
1683 spin_lock_irqsave(vhost->host->host_lock, flags);
1684 ibmvfc_free_event(evt);
1685 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1686 return rsp_rc;
1687}
1688
1689/**
1690 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1691 * @sdev: scsi device to abort commands
1692 *
1693 * This sends an Abort Task Set to the VIOS for the specified device. This does
1694 * NOT send any cancel to the VIOS. That must be done separately.
1695 *
1696 * Returns:
1697 * 0 on success / other on failure
1698 **/
1699static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1700{
1701 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1702 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1703 struct ibmvfc_cmd *tmf;
1704 struct ibmvfc_event *evt, *found_evt;
1705 union ibmvfc_iu rsp_iu;
1706 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1707 int rsp_rc = -EBUSY;
1708 unsigned long flags;
1709 int rsp_code = 0;
1710
1711 spin_lock_irqsave(vhost->host->host_lock, flags);
1712 found_evt = NULL;
1713 list_for_each_entry(evt, &vhost->sent, queue) {
1714 if (evt->cmnd && evt->cmnd->device == sdev) {
1715 found_evt = evt;
1716 break;
1717 }
1718 }
1719
1720 if (!found_evt) {
1721 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1722 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1724 return 0;
1725 }
1726
1727 if (vhost->state == IBMVFC_ACTIVE) {
1728 evt = ibmvfc_get_event(vhost);
1729 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1730
1731 tmf = &evt->iu.cmd;
1732 memset(tmf, 0, sizeof(*tmf));
1733 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1734 tmf->resp.len = sizeof(tmf->rsp);
1735 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1736 tmf->payload_len = sizeof(tmf->iu);
1737 tmf->resp_len = sizeof(tmf->rsp);
1738 tmf->cancel_key = (unsigned long)sdev->hostdata;
1739 tmf->tgt_scsi_id = rport->port_id;
1740 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1741 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1742 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1743 evt->sync_iu = &rsp_iu;
1744
1745 init_completion(&evt->comp);
1746 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1747 }
1748
1749 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1750
1751 if (rsp_rc != 0) {
1752 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1753 return -EIO;
1754 }
1755
1756 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1757 wait_for_completion(&evt->comp);
1758
1759 if (rsp_iu.cmd.status) {
1760 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1761 rsp_code = fc_rsp->data.info.rsp_code;
1762
1763 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1764 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1765 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1766 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1767 fc_rsp->scsi_status);
1768 rsp_rc = -EIO;
1769 } else
1770 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1771
1772 spin_lock_irqsave(vhost->host->host_lock, flags);
1773 ibmvfc_free_event(evt);
1774 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1775 return rsp_rc;
1776}
1777
1778/**
1779 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1780 * @sdev: scsi device to cancel commands
1781 * @type: type of error recovery being performed
1782 *
1783 * This sends a cancel to the VIOS for the specified device. This does
1784 * NOT send any abort to the actual device. That must be done separately.
1785 *
1786 * Returns:
1787 * 0 on success / other on failure
1788 **/
1789static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1790{
1791 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1792 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1793 struct ibmvfc_tmf *tmf;
1794 struct ibmvfc_event *evt, *found_evt;
1795 union ibmvfc_iu rsp;
1796 int rsp_rc = -EBUSY;
1797 unsigned long flags;
1798 u16 status;
1799
1800 ENTER;
1801 spin_lock_irqsave(vhost->host->host_lock, flags);
1802 found_evt = NULL;
1803 list_for_each_entry(evt, &vhost->sent, queue) {
1804 if (evt->cmnd && evt->cmnd->device == sdev) {
1805 found_evt = evt;
1806 break;
1807 }
1808 }
1809
1810 if (!found_evt) {
1811 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1812 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1813 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1814 return 0;
1815 }
1816
1817 if (vhost->state == IBMVFC_ACTIVE) {
1818 evt = ibmvfc_get_event(vhost);
1819 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1820
1821 tmf = &evt->iu.tmf;
1822 memset(tmf, 0, sizeof(*tmf));
1823 tmf->common.version = 1;
1824 tmf->common.opcode = IBMVFC_TMF_MAD;
1825 tmf->common.length = sizeof(*tmf);
1826 tmf->scsi_id = rport->port_id;
1827 int_to_scsilun(sdev->lun, &tmf->lun);
1828 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1829 tmf->cancel_key = (unsigned long)sdev->hostdata;
1830 tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata);
1831
1832 evt->sync_iu = &rsp;
1833 init_completion(&evt->comp);
1834 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1835 }
1836
1837 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1838
1839 if (rsp_rc != 0) {
1840 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1841 return -EIO;
1842 }
1843
1844 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1845
1846 wait_for_completion(&evt->comp);
1847 status = rsp.mad_common.status;
1848 spin_lock_irqsave(vhost->host->host_lock, flags);
1849 ibmvfc_free_event(evt);
1850 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1851
1852 if (status != IBMVFC_MAD_SUCCESS) {
1853 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1854 return -EIO;
1855 }
1856
1857 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1858 return 0;
1859}
1860
1861/**
1862 * ibmvfc_eh_abort_handler - Abort a command
1863 * @cmd: scsi command to abort
1864 *
1865 * Returns:
1866 * SUCCESS / FAILED
1867 **/
1868static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
1869{
1870 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1871 struct ibmvfc_event *evt, *pos;
1872 int cancel_rc, abort_rc;
1873 unsigned long flags;
1874
1875 ENTER;
1876 ibmvfc_wait_while_resetting(vhost);
1877 cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET);
1878 abort_rc = ibmvfc_abort_task_set(cmd->device);
1879
1880 if (!cancel_rc && !abort_rc) {
1881 spin_lock_irqsave(vhost->host->host_lock, flags);
1882 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
1883 if (evt->cmnd && evt->cmnd->device == cmd->device)
1884 ibmvfc_fail_request(evt, DID_ABORT);
1885 }
1886 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1887 LEAVE;
1888 return SUCCESS;
1889 }
1890
1891 LEAVE;
1892 return FAILED;
1893}
1894
1895/**
1896 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1897 * @cmd: scsi command struct
1898 *
1899 * Returns:
1900 * SUCCESS / FAILED
1901 **/
1902static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
1903{
1904 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1905 struct ibmvfc_event *evt, *pos;
1906 int cancel_rc, reset_rc;
1907 unsigned long flags;
1908
1909 ENTER;
1910 ibmvfc_wait_while_resetting(vhost);
1911 cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET);
1912 reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN");
1913
1914 if (!cancel_rc && !reset_rc) {
1915 spin_lock_irqsave(vhost->host->host_lock, flags);
1916 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
1917 if (evt->cmnd && evt->cmnd->device == cmd->device)
1918 ibmvfc_fail_request(evt, DID_ABORT);
1919 }
1920 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1921 LEAVE;
1922 return SUCCESS;
1923 }
1924
1925 LEAVE;
1926 return FAILED;
1927}
1928
1929/**
1930 * ibmvfc_dev_cancel_all - Device iterated cancel all function
1931 * @sdev: scsi device struct
1932 * @data: return code
1933 *
1934 **/
1935static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
1936{
1937 unsigned long *rc = data;
1938 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
1939}
1940
1941/**
1942 * ibmvfc_dev_abort_all - Device iterated abort task set function
1943 * @sdev: scsi device struct
1944 * @data: return code
1945 *
1946 **/
1947static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
1948{
1949 unsigned long *rc = data;
1950 *rc |= ibmvfc_abort_task_set(sdev);
1951}
1952
1953/**
1954 * ibmvfc_eh_target_reset_handler - Reset the target
1955 * @cmd: scsi command struct
1956 *
1957 * Returns:
1958 * SUCCESS / FAILED
1959 **/
1960static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
1961{
1962 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1963 struct scsi_target *starget = scsi_target(cmd->device);
1964 struct ibmvfc_event *evt, *pos;
1965 int reset_rc;
1966 unsigned long cancel_rc = 0;
1967 unsigned long flags;
1968
1969 ENTER;
1970 ibmvfc_wait_while_resetting(vhost);
1971 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
1972 reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target");
1973
1974 if (!cancel_rc && !reset_rc) {
1975 spin_lock_irqsave(vhost->host->host_lock, flags);
1976 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
1977 if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
1978 ibmvfc_fail_request(evt, DID_ABORT);
1979 }
1980 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1981 LEAVE;
1982 return SUCCESS;
1983 }
1984
1985 LEAVE;
1986 return FAILED;
1987}
1988
1989/**
1990 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
1991 * @cmd: struct scsi_cmnd having problems
1992 *
1993 **/
1994static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
1995{
1996 int rc;
1997 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
1998
1999 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2000 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2001 return rc ? FAILED : SUCCESS;
2002}
2003
2004/**
2005 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2006 * @rport: rport struct
2007 *
2008 * Return value:
2009 * none
2010 **/
2011static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2012{
2013 struct scsi_target *starget = to_scsi_target(&rport->dev);
2014 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2015 struct ibmvfc_host *vhost = shost_priv(shost);
2016 struct ibmvfc_event *evt, *pos;
2017 unsigned long cancel_rc = 0;
2018 unsigned long abort_rc = 0;
2019 unsigned long flags;
2020
2021 ENTER;
2022 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2023 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2024
2025 if (!cancel_rc && !abort_rc) {
2026 spin_lock_irqsave(shost->host_lock, flags);
2027 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
2028 if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
2029 ibmvfc_fail_request(evt, DID_ABORT);
2030 }
2031 spin_unlock_irqrestore(shost->host_lock, flags);
2032 } else
2033 ibmvfc_issue_fc_host_lip(shost);
2034
2035 scsi_target_unblock(&rport->dev);
2036 LEAVE;
2037}
2038
2039static const struct {
2040 enum ibmvfc_async_event ae;
2041 const char *desc;
2042} ae_desc [] = {
2043 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2044 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2045 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2046 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2047 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2048 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2049 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2050 { IBMVFC_AE_LINK_UP, "Link Up" },
2051 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2052 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2053 { IBMVFC_AE_HALT, "Halt" },
2054 { IBMVFC_AE_RESUME, "Resume" },
2055 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2056};
2057
2058static const char *unknown_ae = "Unknown async";
2059
2060/**
2061 * ibmvfc_get_ae_desc - Get text description for async event
2062 * @ae: async event
2063 *
2064 **/
2065static const char *ibmvfc_get_ae_desc(u64 ae)
2066{
2067 int i;
2068
2069 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2070 if (ae_desc[i].ae == ae)
2071 return ae_desc[i].desc;
2072
2073 return unknown_ae;
2074}
2075
2076/**
2077 * ibmvfc_handle_async - Handle an async event from the adapter
2078 * @crq: crq to process
2079 * @vhost: ibmvfc host struct
2080 *
2081 **/
2082static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2083 struct ibmvfc_host *vhost)
2084{
2085 const char *desc = ibmvfc_get_ae_desc(crq->event);
2086
3e339946
BK		 2087 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx,"
2088 " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
072b91f9
BK		 2089
2090 switch (crq->event) {
2091 case IBMVFC_AE_LINK_UP:
2092 case IBMVFC_AE_RESUME:
2093 vhost->events_to_log |= IBMVFC_AE_LINKUP;
cf6f10d7 2094 ibmvfc_init_host(vhost, 1);
072b91f9
BK		 2095 break;
2096 case IBMVFC_AE_SCN_FABRIC:
2097 vhost->events_to_log |= IBMVFC_AE_RSCN;
cf6f10d7 2098 ibmvfc_init_host(vhost, 1);
072b91f9
BK		 2099 break;
2100 case IBMVFC_AE_SCN_NPORT:
2101 case IBMVFC_AE_SCN_GROUP:
2102 case IBMVFC_AE_SCN_DOMAIN:
2103 vhost->events_to_log |= IBMVFC_AE_RSCN;
2104 case IBMVFC_AE_ELS_LOGO:
2105 case IBMVFC_AE_ELS_PRLO:
2106 case IBMVFC_AE_ELS_PLOGI:
2107 ibmvfc_reinit_host(vhost);
2108 break;
2109 case IBMVFC_AE_LINK_DOWN:
2110 case IBMVFC_AE_ADAPTER_FAILED:
2111 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2112 break;
2113 case IBMVFC_AE_LINK_DEAD:
2114 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2115 break;
2116 case IBMVFC_AE_HALT:
2117 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2118 break;
2119 default:
2120 dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event);
2121 break;
2122 };
2123}
2124
2125/**
2126 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2127 * @crq: Command/Response queue
2128 * @vhost: ibmvfc host struct
2129 *
2130 **/
2131static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2132{
2133 long rc;
2134 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2135
2136 switch (crq->valid) {
2137 case IBMVFC_CRQ_INIT_RSP:
2138 switch (crq->format) {
2139 case IBMVFC_CRQ_INIT:
2140 dev_info(vhost->dev, "Partner initialized\n");
2141 /* Send back a response */
2142 rc = ibmvfc_send_crq_init_complete(vhost);
2143 if (rc == 0)
cf6f10d7 2144 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2145 else
2146 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2147 break;
2148 case IBMVFC_CRQ_INIT_COMPLETE:
2149 dev_info(vhost->dev, "Partner initialization complete\n");
cf6f10d7 2150 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2151 break;
2152 default:
2153 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2154 }
2155 return;
2156 case IBMVFC_CRQ_XPORT_EVENT:
2157 vhost->state = IBMVFC_NO_CRQ;
2158 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2159 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2160 /* We need to re-setup the interpartition connection */
2161 dev_info(vhost->dev, "Re-enabling adapter\n");
2162 vhost->client_migrated = 1;
2163 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2164 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2165 (rc = ibmvfc_send_crq_init(vhost))) {
2166 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2167 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2168 } else
2169 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2170 } else {
2171 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2172
2173 ibmvfc_purge_requests(vhost, DID_ERROR);
2174 if ((rc = ibmvfc_reset_crq(vhost)) ||
2175 (rc = ibmvfc_send_crq_init(vhost))) {
2176 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2177 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2178 } else
2179 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2180 }
2181 return;
2182 case IBMVFC_CRQ_CMD_RSP:
2183 break;
2184 default:
2185 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2186 return;
2187 }
2188
2189 if (crq->format == IBMVFC_ASYNC_EVENT)
2190 return;
2191
2192 /* The only kind of payload CRQs we should get are responses to
2193 * things we send. Make sure this response is to something we
2194 * actually sent
2195 */
2196 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2197 dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n",
2198 crq->ioba);
2199 return;
2200 }
2201
2202 if (unlikely(atomic_read(&evt->free))) {
2203 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n",
2204 crq->ioba);
2205 return;
2206 }
2207
2208 del_timer(&evt->timer);
2209 list_del(&evt->queue);
2210 ibmvfc_trc_end(evt);
2211 evt->done(evt);
2212}
2213
2214/**
2215 * ibmvfc_scan_finished - Check if the device scan is done.
2216 * @shost: scsi host struct
2217 * @time: current elapsed time
2218 *
2219 * Returns:
2220 * 0 if scan is not done / 1 if scan is done
2221 **/
2222static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2223{
2224 unsigned long flags;
2225 struct ibmvfc_host *vhost = shost_priv(shost);
2226 int done = 0;
2227
2228 spin_lock_irqsave(shost->host_lock, flags);
2229 if (time >= (init_timeout * HZ)) {
2230 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2231 "continuing initialization\n", init_timeout);
2232 done = 1;
2233 }
2234
2235 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE)
2236 done = 1;
2237 spin_unlock_irqrestore(shost->host_lock, flags);
2238 return done;
2239}
2240
2241/**
2242 * ibmvfc_slave_alloc - Setup the device's task set value
2243 * @sdev: struct scsi_device device to configure
2244 *
2245 * Set the device's task set value so that error handling works as
2246 * expected.
2247 *
2248 * Returns:
2249 * 0 on success / -ENXIO if device does not exist
2250 **/
2251static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2252{
2253 struct Scsi_Host *shost = sdev->host;
2254 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2255 struct ibmvfc_host *vhost = shost_priv(shost);
2256 unsigned long flags = 0;
2257
2258 if (!rport || fc_remote_port_chkready(rport))
2259 return -ENXIO;
2260
2261 spin_lock_irqsave(shost->host_lock, flags);
2262 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2263 spin_unlock_irqrestore(shost->host_lock, flags);
2264 return 0;
2265}
2266
2267/**
2268 * ibmvfc_slave_configure - Configure the device
2269 * @sdev: struct scsi_device device to configure
2270 *
2271 * Enable allow_restart for a device if it is a disk. Adjust the
2272 * queue_depth here also.
2273 *
2274 * Returns:
2275 * 0
2276 **/
2277static int ibmvfc_slave_configure(struct scsi_device *sdev)
2278{
2279 struct Scsi_Host *shost = sdev->host;
2280 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2281 unsigned long flags = 0;
2282
2283 spin_lock_irqsave(shost->host_lock, flags);
2284 if (sdev->type == TYPE_DISK)
2285 sdev->allow_restart = 1;
2286
2287 if (sdev->tagged_supported) {
2288 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2289 scsi_activate_tcq(sdev, sdev->queue_depth);
2290 } else
2291 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2292
2293 rport->dev_loss_tmo = dev_loss_tmo;
2294 spin_unlock_irqrestore(shost->host_lock, flags);
2295 return 0;
2296}
2297
2298/**
2299 * ibmvfc_change_queue_depth - Change the device's queue depth
2300 * @sdev: scsi device struct
2301 * @qdepth: depth to set
2302 *
2303 * Return value:
2304 * actual depth set
2305 **/
2306static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2307{
2308 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2309 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2310
2311 scsi_adjust_queue_depth(sdev, 0, qdepth);
2312 return sdev->queue_depth;
2313}
2314
2315/**
2316 * ibmvfc_change_queue_type - Change the device's queue type
2317 * @sdev: scsi device struct
2318 * @tag_type: type of tags to use
2319 *
2320 * Return value:
2321 * actual queue type set
2322 **/
2323static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2324{
2325 if (sdev->tagged_supported) {
2326 scsi_set_tag_type(sdev, tag_type);
2327
2328 if (tag_type)
2329 scsi_activate_tcq(sdev, sdev->queue_depth);
2330 else
2331 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2332 } else
2333 tag_type = 0;
2334
2335 return tag_type;
2336}
2337
2338static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2339 struct device_attribute *attr, char *buf)
2340{
2341 struct Scsi_Host *shost = class_to_shost(dev);
2342 struct ibmvfc_host *vhost = shost_priv(shost);
2343
2344 return snprintf(buf, PAGE_SIZE, "%s\n",
2345 vhost->login_buf->resp.partition_name);
2346}
2347
2348static struct device_attribute ibmvfc_host_partition_name = {
2349 .attr = {
2350 .name = "partition_name",
2351 .mode = S_IRUGO,
2352 },
2353 .show = ibmvfc_show_host_partition_name,
2354};
2355
2356static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2357 struct device_attribute *attr, char *buf)
2358{
2359 struct Scsi_Host *shost = class_to_shost(dev);
2360 struct ibmvfc_host *vhost = shost_priv(shost);
2361
2362 return snprintf(buf, PAGE_SIZE, "%s\n",
2363 vhost->login_buf->resp.device_name);
2364}
2365
2366static struct device_attribute ibmvfc_host_device_name = {
2367 .attr = {
2368 .name = "device_name",
2369 .mode = S_IRUGO,
2370 },
2371 .show = ibmvfc_show_host_device_name,
2372};
2373
2374static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2375 struct device_attribute *attr, char *buf)
2376{
2377 struct Scsi_Host *shost = class_to_shost(dev);
2378 struct ibmvfc_host *vhost = shost_priv(shost);
2379
2380 return snprintf(buf, PAGE_SIZE, "%s\n",
2381 vhost->login_buf->resp.port_loc_code);
2382}
2383
2384static struct device_attribute ibmvfc_host_loc_code = {
2385 .attr = {
2386 .name = "port_loc_code",
2387 .mode = S_IRUGO,
2388 },
2389 .show = ibmvfc_show_host_loc_code,
2390};
2391
2392static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2393 struct device_attribute *attr, char *buf)
2394{
2395 struct Scsi_Host *shost = class_to_shost(dev);
2396 struct ibmvfc_host *vhost = shost_priv(shost);
2397
2398 return snprintf(buf, PAGE_SIZE, "%s\n",
2399 vhost->login_buf->resp.drc_name);
2400}
2401
2402static struct device_attribute ibmvfc_host_drc_name = {
2403 .attr = {
2404 .name = "drc_name",
2405 .mode = S_IRUGO,
2406 },
2407 .show = ibmvfc_show_host_drc_name,
2408};
2409
2410static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2411 struct device_attribute *attr, char *buf)
2412{
2413 struct Scsi_Host *shost = class_to_shost(dev);
2414 struct ibmvfc_host *vhost = shost_priv(shost);
2415 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2416}
2417
2418static struct device_attribute ibmvfc_host_npiv_version = {
2419 .attr = {
2420 .name = "npiv_version",
2421 .mode = S_IRUGO,
2422 },
2423 .show = ibmvfc_show_host_npiv_version,
2424};
2425
2426/**
2427 * ibmvfc_show_log_level - Show the adapter's error logging level
2428 * @dev: class device struct
2429 * @buf: buffer
2430 *
2431 * Return value:
2432 * number of bytes printed to buffer
2433 **/
2434static ssize_t ibmvfc_show_log_level(struct device *dev,
2435 struct device_attribute *attr, char *buf)
2436{
2437 struct Scsi_Host *shost = class_to_shost(dev);
2438 struct ibmvfc_host *vhost = shost_priv(shost);
2439 unsigned long flags = 0;
2440 int len;
2441
2442 spin_lock_irqsave(shost->host_lock, flags);
2443 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2444 spin_unlock_irqrestore(shost->host_lock, flags);
2445 return len;
2446}
2447
2448/**
2449 * ibmvfc_store_log_level - Change the adapter's error logging level
2450 * @dev: class device struct
2451 * @buf: buffer
2452 *
2453 * Return value:
2454 * number of bytes printed to buffer
2455 **/
2456static ssize_t ibmvfc_store_log_level(struct device *dev,
2457 struct device_attribute *attr,
2458 const char *buf, size_t count)
2459{
2460 struct Scsi_Host *shost = class_to_shost(dev);
2461 struct ibmvfc_host *vhost = shost_priv(shost);
2462 unsigned long flags = 0;
2463
2464 spin_lock_irqsave(shost->host_lock, flags);
2465 vhost->log_level = simple_strtoul(buf, NULL, 10);
2466 spin_unlock_irqrestore(shost->host_lock, flags);
2467 return strlen(buf);
2468}
2469
2470static struct device_attribute ibmvfc_log_level_attr = {
2471 .attr = {
2472 .name = "log_level",
2473 .mode = S_IRUGO | S_IWUSR,
2474 },
2475 .show = ibmvfc_show_log_level,
2476 .store = ibmvfc_store_log_level
2477};
2478
2479#ifdef CONFIG_SCSI_IBMVFC_TRACE
2480/**
2481 * ibmvfc_read_trace - Dump the adapter trace
2482 * @kobj: kobject struct
2483 * @bin_attr: bin_attribute struct
2484 * @buf: buffer
2485 * @off: offset
2486 * @count: buffer size
2487 *
2488 * Return value:
2489 * number of bytes printed to buffer
2490 **/
2491static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2492 struct bin_attribute *bin_attr,
2493 char *buf, loff_t off, size_t count)
2494{
2495 struct device *dev = container_of(kobj, struct device, kobj);
2496 struct Scsi_Host *shost = class_to_shost(dev);
2497 struct ibmvfc_host *vhost = shost_priv(shost);
2498 unsigned long flags = 0;
2499 int size = IBMVFC_TRACE_SIZE;
2500 char *src = (char *)vhost->trace;
2501
2502 if (off > size)
2503 return 0;
2504 if (off + count > size) {
2505 size -= off;
2506 count = size;
2507 }
2508
2509 spin_lock_irqsave(shost->host_lock, flags);
2510 memcpy(buf, &src[off], count);
2511 spin_unlock_irqrestore(shost->host_lock, flags);
2512 return count;
2513}
2514
2515static struct bin_attribute ibmvfc_trace_attr = {
2516 .attr = {
2517 .name = "trace",
2518 .mode = S_IRUGO,
2519 },
2520 .size = 0,
2521 .read = ibmvfc_read_trace,
2522};
2523#endif
2524
2525static struct device_attribute *ibmvfc_attrs[] = {
2526 &ibmvfc_host_partition_name,
2527 &ibmvfc_host_device_name,
2528 &ibmvfc_host_loc_code,
2529 &ibmvfc_host_drc_name,
2530 &ibmvfc_host_npiv_version,
2531 &ibmvfc_log_level_attr,
2532 NULL
2533};
2534
2535static struct scsi_host_template driver_template = {
2536 .module = THIS_MODULE,
2537 .name = "IBM POWER Virtual FC Adapter",
2538 .proc_name = IBMVFC_NAME,
2539 .queuecommand = ibmvfc_queuecommand,
2540 .eh_abort_handler = ibmvfc_eh_abort_handler,
2541 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2542 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2543 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2544 .slave_alloc = ibmvfc_slave_alloc,
2545 .slave_configure = ibmvfc_slave_configure,
2546 .scan_finished = ibmvfc_scan_finished,
2547 .change_queue_depth = ibmvfc_change_queue_depth,
2548 .change_queue_type = ibmvfc_change_queue_type,
2549 .cmd_per_lun = 16,
2550 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2551 .this_id = -1,
2552 .sg_tablesize = SG_ALL,
2553 .max_sectors = IBMVFC_MAX_SECTORS,
2554 .use_clustering = ENABLE_CLUSTERING,
2555 .shost_attrs = ibmvfc_attrs,
2556};
2557
2558/**
2559 * ibmvfc_next_async_crq - Returns the next entry in async queue
2560 * @vhost: ibmvfc host struct
2561 *
2562 * Returns:
2563 * Pointer to next entry in queue / NULL if empty
2564 **/
2565static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2566{
2567 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2568 struct ibmvfc_async_crq *crq;
2569
2570 crq = &async_crq->msgs[async_crq->cur];
2571 if (crq->valid & 0x80) {
2572 if (++async_crq->cur == async_crq->size)
2573 async_crq->cur = 0;
2574 } else
2575 crq = NULL;
2576
2577 return crq;
2578}
2579
2580/**
2581 * ibmvfc_next_crq - Returns the next entry in message queue
2582 * @vhost: ibmvfc host struct
2583 *
2584 * Returns:
2585 * Pointer to next entry in queue / NULL if empty
2586 **/
2587static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2588{
2589 struct ibmvfc_crq_queue *queue = &vhost->crq;
2590 struct ibmvfc_crq *crq;
2591
2592 crq = &queue->msgs[queue->cur];
2593 if (crq->valid & 0x80) {
2594 if (++queue->cur == queue->size)
2595 queue->cur = 0;
2596 } else
2597 crq = NULL;
2598
2599 return crq;
2600}
2601
2602/**
2603 * ibmvfc_interrupt - Interrupt handler
2604 * @irq: number of irq to handle, not used
2605 * @dev_instance: ibmvfc_host that received interrupt
2606 *
2607 * Returns:
2608 * IRQ_HANDLED
2609 **/
2610static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2611{
2612 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
2613 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2614 struct ibmvfc_crq *crq;
2615 struct ibmvfc_async_crq *async;
2616 unsigned long flags;
2617 int done = 0;
2618
2619 spin_lock_irqsave(vhost->host->host_lock, flags);
2620 vio_disable_interrupts(to_vio_dev(vhost->dev));
2621 while (!done) {
2622 /* Pull all the valid messages off the CRQ */
2623 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2624 ibmvfc_handle_crq(crq, vhost);
2625 crq->valid = 0;
2626 }
2627
2628 /* Pull all the valid messages off the async CRQ */
2629 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2630 ibmvfc_handle_async(async, vhost);
2631 async->valid = 0;
2632 }
2633
2634 vio_enable_interrupts(vdev);
2635 if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2636 vio_disable_interrupts(vdev);
2637 ibmvfc_handle_crq(crq, vhost);
2638 crq->valid = 0;
2639 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2640 vio_disable_interrupts(vdev);
2641 ibmvfc_handle_async(async, vhost);
2642 crq->valid = 0;
2643 } else
2644 done = 1;
2645 }
2646
2647 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2648 return IRQ_HANDLED;
2649}
2650
2651/**
2652 * ibmvfc_init_tgt - Set the next init job step for the target
2653 * @tgt: ibmvfc target struct
2654 * @job_step: job step to perform
2655 *
2656 **/
2657static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2658 void (*job_step) (struct ibmvfc_target *))
2659{
2660 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2661 tgt->job_step = job_step;
2662 wake_up(&tgt->vhost->work_wait_q);
2663}
2664
2665/**
2666 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2667 * @tgt: ibmvfc target struct
2668 * @job_step: initialization job step
2669 *
2670 **/
2671static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
2672 void (*job_step) (struct ibmvfc_target *))
2673{
2674 if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) {
2675 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2676 wake_up(&tgt->vhost->work_wait_q);
2677 } else
2678 ibmvfc_init_tgt(tgt, job_step);
2679}
2680
072b91f9
BK		 2681/**
2682 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2683 * @evt: ibmvfc event struct
2684 *
2685 **/
2686static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2687{
2688 struct ibmvfc_target *tgt = evt->tgt;
2689 struct ibmvfc_host *vhost = evt->vhost;
2690 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
2691 u32 status = rsp->common.status;
2692
2693 vhost->discovery_threads--;
2694 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2695 switch (status) {
2696 case IBMVFC_MAD_SUCCESS:
2697 tgt_dbg(tgt, "Process Login succeeded\n");
2698 tgt->need_login = 0;
2699 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT);
2700 break;
2701 case IBMVFC_MAD_DRIVER_FAILED:
2702 break;
2703 case IBMVFC_MAD_CRQ_ERROR:
2704 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2705 break;
2706 case IBMVFC_MAD_FAILED:
2707 default:
2708 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2709 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2710 rsp->status, rsp->error, status);
2711 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2712 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2713 break;
2714 };
2715
2716 kref_put(&tgt->kref, ibmvfc_release_tgt);
2717 ibmvfc_free_event(evt);
2718 wake_up(&vhost->work_wait_q);
2719}
2720
2721/**
2722 * ibmvfc_tgt_send_prli - Send a process login
2723 * @tgt: ibmvfc target struct
2724 *
2725 **/
2726static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2727{
2728 struct ibmvfc_process_login *prli;
2729 struct ibmvfc_host *vhost = tgt->vhost;
2730 struct ibmvfc_event *evt;
2731
2732 if (vhost->discovery_threads >= disc_threads)
2733 return;
2734
2735 kref_get(&tgt->kref);
2736 evt = ibmvfc_get_event(vhost);
2737 vhost->discovery_threads++;
2738 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2739 evt->tgt = tgt;
2740 prli = &evt->iu.prli;
2741 memset(prli, 0, sizeof(*prli));
2742 prli->common.version = 1;
2743 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2744 prli->common.length = sizeof(*prli);
2745 prli->scsi_id = tgt->scsi_id;
2746
2747 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2748 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2749 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2750
2751 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2752 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2753 vhost->discovery_threads--;
2754 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2755 kref_put(&tgt->kref, ibmvfc_release_tgt);
2756 } else
2757 tgt_dbg(tgt, "Sent process login\n");
2758}
2759
2760/**
2761 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2762 * @evt: ibmvfc event struct
2763 *
2764 **/
2765static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
2766{
2767 struct ibmvfc_target *tgt = evt->tgt;
2768 struct ibmvfc_host *vhost = evt->vhost;
2769 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
2770 u32 status = rsp->common.status;
2771
2772 vhost->discovery_threads--;
2773 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2774 switch (status) {
2775 case IBMVFC_MAD_SUCCESS:
2776 tgt_dbg(tgt, "Port Login succeeded\n");
2777 if (tgt->ids.port_name &&
2778 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
2779 vhost->reinit = 1;
2780 tgt_dbg(tgt, "Port re-init required\n");
2781 break;
2782 }
2783 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
2784 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
2785 tgt->ids.port_id = tgt->scsi_id;
2786 tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET;
2787 memcpy(&tgt->service_parms, &rsp->service_parms,
2788 sizeof(tgt->service_parms));
2789 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
2790 sizeof(tgt->service_parms_change));
2791 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
2792 break;
2793 case IBMVFC_MAD_DRIVER_FAILED:
2794 break;
2795 case IBMVFC_MAD_CRQ_ERROR:
2796 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2797 break;
2798 case IBMVFC_MAD_FAILED:
2799 default:
2800 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2801 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
2802 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
2803 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
2804
2805 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2806 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2807 break;
2808 };
2809
2810 kref_put(&tgt->kref, ibmvfc_release_tgt);
2811 ibmvfc_free_event(evt);
2812 wake_up(&vhost->work_wait_q);
2813}
2814
2815/**
2816 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
2817 * @tgt: ibmvfc target struct
2818 *
2819 **/
2820static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
2821{
2822 struct ibmvfc_port_login *plogi;
2823 struct ibmvfc_host *vhost = tgt->vhost;
2824 struct ibmvfc_event *evt;
2825
2826 if (vhost->discovery_threads >= disc_threads)
2827 return;
2828
2829 kref_get(&tgt->kref);
2830 evt = ibmvfc_get_event(vhost);
2831 vhost->discovery_threads++;
2832 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2833 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
2834 evt->tgt = tgt;
2835 plogi = &evt->iu.plogi;
2836 memset(plogi, 0, sizeof(*plogi));
2837 plogi->common.version = 1;
2838 plogi->common.opcode = IBMVFC_PORT_LOGIN;
2839 plogi->common.length = sizeof(*plogi);
2840 plogi->scsi_id = tgt->scsi_id;
2841
2842 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2843 vhost->discovery_threads--;
2844 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2845 kref_put(&tgt->kref, ibmvfc_release_tgt);
2846 } else
2847 tgt_dbg(tgt, "Sent port login\n");
2848}
2849
2850/**
2851 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
2852 * @evt: ibmvfc event struct
2853 *
2854 **/
2855static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
2856{
2857 struct ibmvfc_target *tgt = evt->tgt;
2858 struct ibmvfc_host *vhost = evt->vhost;
2859 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
2860 u32 status = rsp->common.status;
2861
2862 vhost->discovery_threads--;
2863 ibmvfc_free_event(evt);
2864 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2865
2866 switch (status) {
2867 case IBMVFC_MAD_SUCCESS:
2868 tgt_dbg(tgt, "Implicit Logout succeeded\n");
2869 break;
2870 case IBMVFC_MAD_DRIVER_FAILED:
2871 kref_put(&tgt->kref, ibmvfc_release_tgt);
2872 wake_up(&vhost->work_wait_q);
2873 return;
2874 case IBMVFC_MAD_FAILED:
2875 default:
2876 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
2877 break;
2878 };
2879
2880 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
2881 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
2882 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
2883 tgt->scsi_id != tgt->new_scsi_id)
2884 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2885 kref_put(&tgt->kref, ibmvfc_release_tgt);
2886 wake_up(&vhost->work_wait_q);
2887}
2888
2889/**
2890 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
2891 * @tgt: ibmvfc target struct
2892 *
2893 **/
2894static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
2895{
2896 struct ibmvfc_implicit_logout *mad;
2897 struct ibmvfc_host *vhost = tgt->vhost;
2898 struct ibmvfc_event *evt;
2899
2900 if (vhost->discovery_threads >= disc_threads)
2901 return;
2902
2903 kref_get(&tgt->kref);
2904 evt = ibmvfc_get_event(vhost);
2905 vhost->discovery_threads++;
2906 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
2907 evt->tgt = tgt;
2908 mad = &evt->iu.implicit_logout;
2909 memset(mad, 0, sizeof(*mad));
2910 mad->common.version = 1;
2911 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
2912 mad->common.length = sizeof(*mad);
2913 mad->old_scsi_id = tgt->scsi_id;
2914
2915 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2916 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2917 vhost->discovery_threads--;
2918 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2919 kref_put(&tgt->kref, ibmvfc_release_tgt);
2920 } else
2921 tgt_dbg(tgt, "Sent Implicit Logout\n");
2922}
2923
989b8545
BK		 2924/**
2925 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
2926 * @mad: ibmvfc passthru mad struct
2927 * @tgt: ibmvfc target struct
2928 *
2929 * Returns:
2930 * 1 if PLOGI needed / 0 if PLOGI not needed
2931 **/
2932static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
2933 struct ibmvfc_target *tgt)
2934{
2935 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
2936 sizeof(tgt->ids.port_name)))
2937 return 1;
2938 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
2939 sizeof(tgt->ids.node_name)))
2940 return 1;
2941 if (mad->fc_iu.response[6] != tgt->scsi_id)
2942 return 1;
2943 return 0;
2944}
2945
2946/**
2947 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
2948 * @evt: ibmvfc event struct
2949 *
2950 **/
2951static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
2952{
2953 struct ibmvfc_target *tgt = evt->tgt;
2954 struct ibmvfc_host *vhost = evt->vhost;
2955 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
2956 u32 status = mad->common.status;
2957 u8 fc_reason, fc_explain;
2958
2959 vhost->discovery_threads--;
2960 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2961
2962 switch (status) {
2963 case IBMVFC_MAD_SUCCESS:
2964 tgt_dbg(tgt, "ADISC succeeded\n");
2965 if (ibmvfc_adisc_needs_plogi(mad, tgt))
2966 tgt->need_login = 1;
2967 break;
2968 case IBMVFC_MAD_DRIVER_FAILED:
2969 break;
2970 case IBMVFC_MAD_FAILED:
2971 default:
2972 tgt->need_login = 1;
2973 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
2974 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
2975 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2976 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
2977 mad->iu.status, mad->iu.error,
2978 ibmvfc_get_fc_type(fc_reason), fc_reason,
2979 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
2980 break;
2981 };
2982
2983 kref_put(&tgt->kref, ibmvfc_release_tgt);
2984 ibmvfc_free_event(evt);
2985 wake_up(&vhost->work_wait_q);
2986}
2987
2988/**
2989 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
2990 * @evt: ibmvfc event struct
2991 *
2992 **/
2993static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
2994{
2995 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
2996
2997 memset(mad, 0, sizeof(*mad));
2998 mad->common.version = 1;
2999 mad->common.opcode = IBMVFC_PASSTHRU;
3000 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3001 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3002 offsetof(struct ibmvfc_passthru_mad, iu);
3003 mad->cmd_ioba.len = sizeof(mad->iu);
3004 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3005 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3006 mad->iu.cmd.va = (u64)evt->crq.ioba +
3007 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3008 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3009 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3010 mad->iu.rsp.va = (u64)evt->crq.ioba +
3011 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3012 offsetof(struct ibmvfc_passthru_fc_iu, response);
3013 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3014}
3015
3016/**
3017 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3018 * @tgt: ibmvfc target struct
3019 *
3020 **/
3021static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3022{
3023 struct ibmvfc_passthru_mad *mad;
3024 struct ibmvfc_host *vhost = tgt->vhost;
3025 struct ibmvfc_event *evt;
3026
3027 if (vhost->discovery_threads >= disc_threads)
3028 return;
3029
3030 kref_get(&tgt->kref);
3031 evt = ibmvfc_get_event(vhost);
3032 vhost->discovery_threads++;
3033 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3034 evt->tgt = tgt;
3035
3036 ibmvfc_init_passthru(evt);
3037 mad = &evt->iu.passthru;
3038 mad->iu.flags = IBMVFC_FC_ELS;
3039 mad->iu.scsi_id = tgt->scsi_id;
3040
3041 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3042 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3043 sizeof(vhost->login_buf->resp.port_name));
3044 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3045 sizeof(vhost->login_buf->resp.node_name));
3046 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3047
3048 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3049 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3050 vhost->discovery_threads--;
3051 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3052 kref_put(&tgt->kref, ibmvfc_release_tgt);
3053 } else
3054 tgt_dbg(tgt, "Sent ADISC\n");
3055}
3056
072b91f9
BK		 3057/**
3058 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3059 * @evt: ibmvfc event struct
3060 *
3061 **/
3062static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3063{
3064 struct ibmvfc_target *tgt = evt->tgt;
3065 struct ibmvfc_host *vhost = evt->vhost;
3066 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3067 u32 status = rsp->common.status;
3068
3069 vhost->discovery_threads--;
3070 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3071 switch (status) {
3072 case IBMVFC_MAD_SUCCESS:
3073 tgt_dbg(tgt, "Query Target succeeded\n");
3074 tgt->new_scsi_id = rsp->scsi_id;
3075 if (rsp->scsi_id != tgt->scsi_id)
3076 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3077 else
3078 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3079 break;
3080 case IBMVFC_MAD_DRIVER_FAILED:
3081 break;
3082 case IBMVFC_MAD_CRQ_ERROR:
3083 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3084 break;
3085 case IBMVFC_MAD_FAILED:
3086 default:
3087 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3088 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3089 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3090 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3091
3092 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3093 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3094 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3095 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3096 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3097 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3098 break;
3099 };
3100
3101 kref_put(&tgt->kref, ibmvfc_release_tgt);
3102 ibmvfc_free_event(evt);
3103 wake_up(&vhost->work_wait_q);
3104}
3105
3106/**
3107 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3108 * @tgt: ibmvfc target struct
3109 *
3110 **/
3111static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3112{
3113 struct ibmvfc_query_tgt *query_tgt;
3114 struct ibmvfc_host *vhost = tgt->vhost;
3115 struct ibmvfc_event *evt;
3116
3117 if (vhost->discovery_threads >= disc_threads)
3118 return;
3119
3120 kref_get(&tgt->kref);
3121 evt = ibmvfc_get_event(vhost);
3122 vhost->discovery_threads++;
3123 evt->tgt = tgt;
3124 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3125 query_tgt = &evt->iu.query_tgt;
3126 memset(query_tgt, 0, sizeof(*query_tgt));
3127 query_tgt->common.version = 1;
3128 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3129 query_tgt->common.length = sizeof(*query_tgt);
3130 query_tgt->wwpn = tgt->ids.port_name;
3131
3132 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3133 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3134 vhost->discovery_threads--;
3135 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3136 kref_put(&tgt->kref, ibmvfc_release_tgt);
3137 } else
3138 tgt_dbg(tgt, "Sent Query Target\n");
3139}
3140
3141/**
3142 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3143 * @vhost: ibmvfc host struct
3144 * @scsi_id: SCSI ID to allocate target for
3145 *
3146 * Returns:
3147 * 0 on success / other on failure
3148 **/
3149static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3150{
3151 struct ibmvfc_target *tgt;
3152 unsigned long flags;
3153
3154 spin_lock_irqsave(vhost->host->host_lock, flags);
3155 list_for_each_entry(tgt, &vhost->targets, queue) {
3156 if (tgt->scsi_id == scsi_id) {
3157 if (tgt->need_login)
3158 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3159 goto unlock_out;
3160 }
3161 }
3162 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3163
3164 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
3165 if (!tgt) {
3166 dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n",
3167 scsi_id);
3168 return -ENOMEM;
3169 }
3170
3171 tgt->scsi_id = scsi_id;
3172 tgt->new_scsi_id = scsi_id;
3173 tgt->vhost = vhost;
3174 tgt->need_login = 1;
3175 kref_init(&tgt->kref);
3176 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3177 spin_lock_irqsave(vhost->host->host_lock, flags);
3178 list_add_tail(&tgt->queue, &vhost->targets);
3179
3180unlock_out:
3181 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3182 return 0;
3183}
3184
3185/**
3186 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3187 * @vhost: ibmvfc host struct
3188 *
3189 * Returns:
3190 * 0 on success / other on failure
3191 **/
3192static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3193{
3194 int i, rc;
3195
3196 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3197 rc = ibmvfc_alloc_target(vhost,
3198 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3199
3200 return rc;
3201}
3202
3203/**
3204 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3205 * @evt: ibmvfc event struct
3206 *
3207 **/
3208static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3209{
3210 struct ibmvfc_host *vhost = evt->vhost;
3211 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3212 u32 mad_status = rsp->common.status;
3213
3214 switch (mad_status) {
3215 case IBMVFC_MAD_SUCCESS:
3216 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3217 vhost->num_targets = rsp->num_written;
3218 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3219 break;
3220 case IBMVFC_MAD_FAILED:
3221 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n",
3222 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3223 ibmvfc_retry_host_init(vhost);
3224 break;
3225 case IBMVFC_MAD_DRIVER_FAILED:
3226 break;
3227 default:
3228 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3229 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3230 break;
3231 }
3232
3233 ibmvfc_free_event(evt);
3234 wake_up(&vhost->work_wait_q);
3235}
3236
3237/**
3238 * ibmvfc_discover_targets - Send Discover Targets MAD
3239 * @vhost: ibmvfc host struct
3240 *
3241 **/
3242static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3243{
3244 struct ibmvfc_discover_targets *mad;
3245 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3246
3247 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3248 mad = &evt->iu.discover_targets;
3249 memset(mad, 0, sizeof(*mad));
3250 mad->common.version = 1;
3251 mad->common.opcode = IBMVFC_DISC_TARGETS;
3252 mad->common.length = sizeof(*mad);
3253 mad->bufflen = vhost->disc_buf_sz;
3254 mad->buffer.va = vhost->disc_buf_dma;
3255 mad->buffer.len = vhost->disc_buf_sz;
3256 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3257
3258 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3259 ibmvfc_dbg(vhost, "Sent discover targets\n");
3260 else
3261 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3262}
3263
3264/**
3265 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3266 * @evt: ibmvfc event struct
3267 *
3268 **/
3269static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3270{
3271 struct ibmvfc_host *vhost = evt->vhost;
3272 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3273 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3274 unsigned int npiv_max_sectors;
3275
3276 switch (mad_status) {
3277 case IBMVFC_MAD_SUCCESS:
3278 ibmvfc_free_event(evt);
3279 break;
3280 case IBMVFC_MAD_FAILED:
3281 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n",
3282 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3283 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3284 ibmvfc_retry_host_init(vhost);
3285 else
3286 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3287 ibmvfc_free_event(evt);
3288 return;
3289 case IBMVFC_MAD_CRQ_ERROR:
3290 ibmvfc_retry_host_init(vhost);
3291 case IBMVFC_MAD_DRIVER_FAILED:
3292 ibmvfc_free_event(evt);
3293 return;
3294 default:
3295 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3296 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3297 ibmvfc_free_event(evt);
3298 return;
3299 }
3300
3301 vhost->client_migrated = 0;
3302
3303 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3304 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3305 rsp->flags);
3306 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3307 wake_up(&vhost->work_wait_q);
3308 return;
3309 }
3310
3311 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3312 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3313 rsp->max_cmds);
3314 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3315 wake_up(&vhost->work_wait_q);
3316 return;
3317 }
3318
3319 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3320 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3321 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3322 rsp->drc_name, npiv_max_sectors);
3323
3324 fc_host_fabric_name(vhost->host) = rsp->node_name;
3325 fc_host_node_name(vhost->host) = rsp->node_name;
3326 fc_host_port_name(vhost->host) = rsp->port_name;
3327 fc_host_port_id(vhost->host) = rsp->scsi_id;
3328 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3329 fc_host_supported_classes(vhost->host) = 0;
3330 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3331 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3332 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3333 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3334 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3335 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3336 fc_host_maxframe_size(vhost->host) =
3337 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3338
3339 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3340 vhost->host->max_sectors = npiv_max_sectors;
3341 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3342 wake_up(&vhost->work_wait_q);
3343}
3344
3345/**
3346 * ibmvfc_npiv_login - Sends NPIV login
3347 * @vhost: ibmvfc host struct
3348 *
3349 **/
3350static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3351{
3352 struct ibmvfc_npiv_login_mad *mad;
3353 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3354
3355 ibmvfc_gather_partition_info(vhost);
3356 ibmvfc_set_login_info(vhost);
3357 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3358
3359 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3360 mad = &evt->iu.npiv_login;
3361 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3362 mad->common.version = 1;
3363 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3364 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3365 mad->buffer.va = vhost->login_buf_dma;
3366 mad->buffer.len = sizeof(*vhost->login_buf);
3367
072b91f9
BK		 3368 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3369
3370 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3371 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3372 else
3373 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3374};
3375
3376/**
3377 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3378 * @vhost: ibmvfc host struct
3379 *
3380 * Returns:
3381 * 1 if work to do / 0 if not
3382 **/
3383static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3384{
3385 struct ibmvfc_target *tgt;
3386
3387 list_for_each_entry(tgt, &vhost->targets, queue) {
3388 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3389 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3390 return 1;
3391 }
3392
3393 return 0;
3394}
3395
3396/**
3397 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3398 * @vhost: ibmvfc host struct
3399 *
3400 * Returns:
3401 * 1 if work to do / 0 if not
3402 **/
3403static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3404{
3405 struct ibmvfc_target *tgt;
3406
3407 if (kthread_should_stop())
3408 return 1;
3409 switch (vhost->action) {
3410 case IBMVFC_HOST_ACTION_NONE:
3411 case IBMVFC_HOST_ACTION_INIT_WAIT:
3412 return 0;
3413 case IBMVFC_HOST_ACTION_TGT_INIT:
3414 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3415 if (vhost->discovery_threads == disc_threads)
3416 return 0;
3417 list_for_each_entry(tgt, &vhost->targets, queue)
3418 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3419 return 1;
3420 list_for_each_entry(tgt, &vhost->targets, queue)
3421 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3422 return 0;
3423 return 1;
3424 case IBMVFC_HOST_ACTION_INIT:
3425 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3426 case IBMVFC_HOST_ACTION_TGT_ADD:
3427 case IBMVFC_HOST_ACTION_TGT_DEL:
3428 case IBMVFC_HOST_ACTION_QUERY:
3429 default:
3430 break;
3431 };
3432
3433 return 1;
3434}
3435
3436/**
3437 * ibmvfc_work_to_do - Is there task level work to do?
3438 * @vhost: ibmvfc host struct
3439 *
3440 * Returns:
3441 * 1 if work to do / 0 if not
3442 **/
3443static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3444{
3445 unsigned long flags;
3446 int rc;
3447
3448 spin_lock_irqsave(vhost->host->host_lock, flags);
3449 rc = __ibmvfc_work_to_do(vhost);
3450 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3451 return rc;
3452}
3453
3454/**
3455 * ibmvfc_log_ae - Log async events if necessary
3456 * @vhost: ibmvfc host struct
3457 * @events: events to log
3458 *
3459 **/
3460static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3461{
3462 if (events & IBMVFC_AE_RSCN)
3463 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3464 if ((events & IBMVFC_AE_LINKDOWN) &&
3465 vhost->state >= IBMVFC_HALTED)
3466 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3467 if ((events & IBMVFC_AE_LINKUP) &&
3468 vhost->state == IBMVFC_INITIALIZING)
3469 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3470}
3471
3472/**
3473 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3474 * @tgt: ibmvfc target struct
3475 *
3476 **/
3477static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3478{
3479 struct ibmvfc_host *vhost = tgt->vhost;
3480 struct fc_rport *rport;
3481 unsigned long flags;
3482
3483 tgt_dbg(tgt, "Adding rport\n");
3484 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3485 spin_lock_irqsave(vhost->host->host_lock, flags);
3486 tgt->rport = rport;
3487 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3488 if (rport) {
3489 tgt_dbg(tgt, "rport add succeeded\n");
3490 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3491 rport->supported_classes = 0;
52d7e861 3492 tgt->target_id = rport->scsi_target_id;
072b91f9
BK		 3493 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3494 rport->supported_classes |= FC_COS_CLASS1;
3495 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3496 rport->supported_classes |= FC_COS_CLASS2;
3497 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3498 rport->supported_classes |= FC_COS_CLASS3;
3499 } else
3500 tgt_dbg(tgt, "rport add failed\n");
3501 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3502}
3503
3504/**
3505 * ibmvfc_do_work - Do task level work
3506 * @vhost: ibmvfc host struct
3507 *
3508 **/
3509static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3510{
3511 struct ibmvfc_target *tgt;
3512 unsigned long flags;
3513 struct fc_rport *rport;
3514
3515 ibmvfc_log_ae(vhost, vhost->events_to_log);
3516 spin_lock_irqsave(vhost->host->host_lock, flags);
3517 vhost->events_to_log = 0;
3518 switch (vhost->action) {
3519 case IBMVFC_HOST_ACTION_NONE:
3520 case IBMVFC_HOST_ACTION_INIT_WAIT:
3521 break;
3522 case IBMVFC_HOST_ACTION_INIT:
3523 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
3524 vhost->job_step(vhost);
3525 break;
3526 case IBMVFC_HOST_ACTION_QUERY:
3527 list_for_each_entry(tgt, &vhost->targets, queue)
3528 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3529 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3530 break;
3531 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3532 list_for_each_entry(tgt, &vhost->targets, queue) {
3533 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3534 tgt->job_step(tgt);
3535 break;
3536 }
3537 }
3538
3539 if (!ibmvfc_dev_init_to_do(vhost))
3540 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3541 break;
3542 case IBMVFC_HOST_ACTION_TGT_DEL:
3543 list_for_each_entry(tgt, &vhost->targets, queue) {
3544 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3545 tgt_dbg(tgt, "Deleting rport\n");
3546 rport = tgt->rport;
3547 tgt->rport = NULL;
3548 list_del(&tgt->queue);
3549 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3550 if (rport)
3551 fc_remote_port_delete(rport);
3552 kref_put(&tgt->kref, ibmvfc_release_tgt);
3553 return;
3554 }
3555 }
3556
3557 if (vhost->state == IBMVFC_INITIALIZING) {
3558 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3559 vhost->job_step = ibmvfc_discover_targets;
3560 } else {
3561 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3562 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3563 scsi_unblock_requests(vhost->host);
3564 wake_up(&vhost->init_wait_q);
3565 return;
3566 }
3567 break;
3568 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3569 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
3570 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3571 ibmvfc_alloc_targets(vhost);
3572 spin_lock_irqsave(vhost->host->host_lock, flags);
3573 break;
3574 case IBMVFC_HOST_ACTION_TGT_INIT:
3575 list_for_each_entry(tgt, &vhost->targets, queue) {
3576 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3577 tgt->job_step(tgt);
3578 break;
3579 }
3580 }
3581
3582 if (!ibmvfc_dev_init_to_do(vhost)) {
3583 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3584 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD);
3585 vhost->init_retries = 0;
3586 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3587 scsi_unblock_requests(vhost->host);
3588 return;
3589 }
3590 break;
3591 case IBMVFC_HOST_ACTION_TGT_ADD:
3592 list_for_each_entry(tgt, &vhost->targets, queue) {
3593 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) {
3594 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3595 ibmvfc_tgt_add_rport(tgt);
3596 return;
3597 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3598 tgt_dbg(tgt, "Deleting rport\n");
3599 rport = tgt->rport;
3600 tgt->rport = NULL;
3601 list_del(&tgt->queue);
3602 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3603 if (rport)
3604 fc_remote_port_delete(rport);
3605 kref_put(&tgt->kref, ibmvfc_release_tgt);
3606 return;
3607 }
3608 }
3609
915be024 3610 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
072b91f9 3611 vhost->reinit = 0;
915be024 3612 scsi_block_requests(vhost->host);
072b91f9
BK		 3613 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3614 } else {
3615 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3616 wake_up(&vhost->init_wait_q);
3617 }
3618 break;
3619 default:
3620 break;
3621 };
3622
3623 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3624}
3625
3626/**
3627 * ibmvfc_work - Do task level work
3628 * @data: ibmvfc host struct
3629 *
3630 * Returns:
3631 * zero
3632 **/
3633static int ibmvfc_work(void *data)
3634{
3635 struct ibmvfc_host *vhost = data;
3636 int rc;
3637
3638 set_user_nice(current, -20);
3639
3640 while (1) {
3641 rc = wait_event_interruptible(vhost->work_wait_q,
3642 ibmvfc_work_to_do(vhost));
3643
3644 BUG_ON(rc);
3645
3646 if (kthread_should_stop())
3647 break;
3648
3649 ibmvfc_do_work(vhost);
3650 }
3651
3652 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
3653 return 0;
3654}
3655
3656/**
3657 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3658 * @vhost: ibmvfc host struct
3659 *
3660 * Allocates a page for messages, maps it for dma, and registers
3661 * the crq with the hypervisor.
3662 *
3663 * Return value:
3664 * zero on success / other on failure
3665 **/
3666static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
3667{
3668 int rc, retrc = -ENOMEM;
3669 struct device *dev = vhost->dev;
3670 struct vio_dev *vdev = to_vio_dev(dev);
3671 struct ibmvfc_crq_queue *crq = &vhost->crq;
3672
3673 ENTER;
3674 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
3675
3676 if (!crq->msgs)
3677 return -ENOMEM;
3678
3679 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3680 crq->msg_token = dma_map_single(dev, crq->msgs,
3681 PAGE_SIZE, DMA_BIDIRECTIONAL);
3682
8d8bb39b 3683 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 3684 goto map_failed;
3685
3686 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3687 crq->msg_token, PAGE_SIZE);
3688
3689 if (rc == H_RESOURCE)
3690 /* maybe kexecing and resource is busy. try a reset */
3691 retrc = rc = ibmvfc_reset_crq(vhost);
3692
3693 if (rc == H_CLOSED)
3694 dev_warn(dev, "Partner adapter not ready\n");
3695 else if (rc) {
3696 dev_warn(dev, "Error %d opening adapter\n", rc);
3697 goto reg_crq_failed;
3698 }
3699
3700 retrc = 0;
3701
3702 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
3703 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
3704 goto req_irq_failed;
3705 }
3706
3707 if ((rc = vio_enable_interrupts(vdev))) {
3708 dev_err(dev, "Error %d enabling interrupts\n", rc);
3709 goto req_irq_failed;
3710 }
3711
3712 crq->cur = 0;
3713 LEAVE;
3714 return retrc;
3715
3716req_irq_failed:
3717 do {
3718 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3719 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3720reg_crq_failed:
3721 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3722map_failed:
3723 free_page((unsigned long)crq->msgs);
3724 return retrc;
3725}
3726
3727/**
3728 * ibmvfc_free_mem - Free memory for vhost
3729 * @vhost: ibmvfc host struct
3730 *
3731 * Return value:
3732 * none
3733 **/
3734static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
3735{
3736 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3737
3738 ENTER;
3739 mempool_destroy(vhost->tgt_pool);
3740 kfree(vhost->trace);
3741 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
3742 vhost->disc_buf_dma);
3743 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
3744 vhost->login_buf, vhost->login_buf_dma);
3745 dma_pool_destroy(vhost->sg_pool);
3746 dma_unmap_single(vhost->dev, async_q->msg_token,
3747 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3748 free_page((unsigned long)async_q->msgs);
3749 LEAVE;
3750}
3751
3752/**
3753 * ibmvfc_alloc_mem - Allocate memory for vhost
3754 * @vhost: ibmvfc host struct
3755 *
3756 * Return value:
3757 * 0 on success / non-zero on failure
3758 **/
3759static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
3760{
3761 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3762 struct device *dev = vhost->dev;
3763
3764 ENTER;
3765 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
3766 if (!async_q->msgs) {
3767 dev_err(dev, "Couldn't allocate async queue.\n");
3768 goto nomem;
3769 }
3770
3771 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
3772 async_q->msg_token = dma_map_single(dev, async_q->msgs,
3773 async_q->size * sizeof(*async_q->msgs),
3774 DMA_BIDIRECTIONAL);
3775
8d8bb39b 3776 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 3777 dev_err(dev, "Failed to map async queue\n");
3778 goto free_async_crq;
3779 }
3780
3781 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
3782 SG_ALL * sizeof(struct srp_direct_buf),
3783 sizeof(struct srp_direct_buf), 0);
3784
3785 if (!vhost->sg_pool) {
3786 dev_err(dev, "Failed to allocate sg pool\n");
3787 goto unmap_async_crq;
3788 }
3789
3790 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
3791 &vhost->login_buf_dma, GFP_KERNEL);
3792
3793 if (!vhost->login_buf) {
3794 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
3795 goto free_sg_pool;
3796 }
3797
3798 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
3799 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
3800 &vhost->disc_buf_dma, GFP_KERNEL);
3801
3802 if (!vhost->disc_buf) {
3803 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
3804 goto free_login_buffer;
3805 }
3806
3807 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
3808 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
3809
3810 if (!vhost->trace)
3811 goto free_disc_buffer;
3812
3813 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
3814 sizeof(struct ibmvfc_target));
3815
3816 if (!vhost->tgt_pool) {
3817 dev_err(dev, "Couldn't allocate target memory pool\n");
3818 goto free_trace;
3819 }
3820
3821 LEAVE;
3822 return 0;
3823
3824free_trace:
3825 kfree(vhost->trace);
3826free_disc_buffer:
3827 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
3828 vhost->disc_buf_dma);
3829free_login_buffer:
3830 dma_free_coherent(dev, sizeof(*vhost->login_buf),
3831 vhost->login_buf, vhost->login_buf_dma);
3832free_sg_pool:
3833 dma_pool_destroy(vhost->sg_pool);
3834unmap_async_crq:
3835 dma_unmap_single(dev, async_q->msg_token,
3836 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3837free_async_crq:
3838 free_page((unsigned long)async_q->msgs);
3839nomem:
3840 LEAVE;
3841 return -ENOMEM;
3842}
3843
3844/**
3845 * ibmvfc_probe - Adapter hot plug add entry point
3846 * @vdev: vio device struct
3847 * @id: vio device id struct
3848 *
3849 * Return value:
3850 * 0 on success / non-zero on failure
3851 **/
3852static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
3853{
3854 struct ibmvfc_host *vhost;
3855 struct Scsi_Host *shost;
3856 struct device *dev = &vdev->dev;
3857 int rc = -ENOMEM;
3858
3859 ENTER;
3860 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
3861 if (!shost) {
3862 dev_err(dev, "Couldn't allocate host data\n");
3863 goto out;
3864 }
3865
3866 shost->transportt = ibmvfc_transport_template;
3867 shost->can_queue = max_requests;
3868 shost->max_lun = max_lun;
3869 shost->max_id = max_targets;
3870 shost->max_sectors = IBMVFC_MAX_SECTORS;
3871 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
3872 shost->unique_id = shost->host_no;
3873
3874 vhost = shost_priv(shost);
3875 INIT_LIST_HEAD(&vhost->sent);
3876 INIT_LIST_HEAD(&vhost->free);
3877 INIT_LIST_HEAD(&vhost->targets);
3878 sprintf(vhost->name, IBMVFC_NAME);
3879 vhost->host = shost;
3880 vhost->dev = dev;
3881 vhost->partition_number = -1;
3882 vhost->log_level = log_level;
3883 strcpy(vhost->partition_name, "UNKNOWN");
3884 init_waitqueue_head(&vhost->work_wait_q);
3885 init_waitqueue_head(&vhost->init_wait_q);
3886
3887 if ((rc = ibmvfc_alloc_mem(vhost)))
3888 goto free_scsi_host;
3889
3890 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
3891 shost->host_no);
3892
3893 if (IS_ERR(vhost->work_thread)) {
3894 dev_err(dev, "Couldn't create kernel thread: %ld\n",
3895 PTR_ERR(vhost->work_thread));
3896 goto free_host_mem;
3897 }
3898
3899 if ((rc = ibmvfc_init_crq(vhost))) {
3900 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3901 goto kill_kthread;
3902 }
3903
3904 if ((rc = ibmvfc_init_event_pool(vhost))) {
3905 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
3906 goto release_crq;
3907 }
3908
3909 if ((rc = scsi_add_host(shost, dev)))
3910 goto release_event_pool;
3911
3912 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
3913 &ibmvfc_trace_attr))) {
3914 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
3915 goto remove_shost;
3916 }
3917
3918 dev_set_drvdata(dev, vhost);
3919 spin_lock(&ibmvfc_driver_lock);
3920 list_add_tail(&vhost->queue, &ibmvfc_head);
3921 spin_unlock(&ibmvfc_driver_lock);
3922
3923 ibmvfc_send_crq_init(vhost);
3924 scsi_scan_host(shost);
3925 return 0;
3926
3927remove_shost:
3928 scsi_remove_host(shost);
3929release_event_pool:
3930 ibmvfc_free_event_pool(vhost);
3931release_crq:
3932 ibmvfc_release_crq_queue(vhost);
3933kill_kthread:
3934 kthread_stop(vhost->work_thread);
3935free_host_mem:
3936 ibmvfc_free_mem(vhost);
3937free_scsi_host:
3938 scsi_host_put(shost);
3939out:
3940 LEAVE;
3941 return rc;
3942}
3943
3944/**
3945 * ibmvfc_remove - Adapter hot plug remove entry point
3946 * @vdev: vio device struct
3947 *
3948 * Return value:
3949 * 0
3950 **/
3951static int ibmvfc_remove(struct vio_dev *vdev)
3952{
3953 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
3954 unsigned long flags;
3955
3956 ENTER;
3957 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
2d0da2a4
BK		 3958 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
3959 ibmvfc_wait_while_resetting(vhost);
3960 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 3961 kthread_stop(vhost->work_thread);
3962 fc_remove_host(vhost->host);
3963 scsi_remove_host(vhost->host);
072b91f9
BK		 3964
3965 spin_lock_irqsave(vhost->host->host_lock, flags);
3966 ibmvfc_purge_requests(vhost, DID_ERROR);
3967 ibmvfc_free_event_pool(vhost);
3968 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3969
3970 ibmvfc_free_mem(vhost);
3971 spin_lock(&ibmvfc_driver_lock);
3972 list_del(&vhost->queue);
3973 spin_unlock(&ibmvfc_driver_lock);
3974 scsi_host_put(vhost->host);
3975 LEAVE;
3976 return 0;
3977}
3978
39c1ffec
BK		 3979/**
3980 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
3981 * @vdev: vio device struct
3982 *
3983 * Return value:
3984 * Number of bytes the driver will need to DMA map at the same time in
3985 * order to perform well.
3986 */
3987static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
3988{
3989 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
3990 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
3991}
3992
072b91f9
BK		 3993static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
3994 {"fcp", "IBM,vfc-client"},
3995 { "", "" }
3996};
3997MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
3998
3999static struct vio_driver ibmvfc_driver = {
4000 .id_table = ibmvfc_device_table,
4001 .probe = ibmvfc_probe,
4002 .remove = ibmvfc_remove,
39c1ffec 4003 .get_desired_dma = ibmvfc_get_desired_dma,
072b91f9
BK		 4004 .driver = {
4005 .name = IBMVFC_NAME,
4006 .owner = THIS_MODULE,
4007 }
4008};
4009
4010static struct fc_function_template ibmvfc_transport_functions = {
4011 .show_host_fabric_name = 1,
4012 .show_host_node_name = 1,
4013 .show_host_port_name = 1,
4014 .show_host_supported_classes = 1,
4015 .show_host_port_type = 1,
4016 .show_host_port_id = 1,
4017
4018 .get_host_port_state = ibmvfc_get_host_port_state,
4019 .show_host_port_state = 1,
4020
4021 .get_host_speed = ibmvfc_get_host_speed,
4022 .show_host_speed = 1,
4023
4024 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4025 .terminate_rport_io = ibmvfc_terminate_rport_io,
4026
4027 .show_rport_maxframe_size = 1,
4028 .show_rport_supported_classes = 1,
4029
4030 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4031 .show_rport_dev_loss_tmo = 1,
4032
4033 .get_starget_node_name = ibmvfc_get_starget_node_name,
4034 .show_starget_node_name = 1,
4035
4036 .get_starget_port_name = ibmvfc_get_starget_port_name,
4037 .show_starget_port_name = 1,
4038
4039 .get_starget_port_id = ibmvfc_get_starget_port_id,
4040 .show_starget_port_id = 1,
4041};
4042
4043/**
4044 * ibmvfc_module_init - Initialize the ibmvfc module
4045 *
4046 * Return value:
4047 * 0 on success / other on failure
4048 **/
4049static int __init ibmvfc_module_init(void)
4050{
4051 int rc;
4052
4053 if (!firmware_has_feature(FW_FEATURE_VIO))
4054 return -ENODEV;
4055
4056 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4057 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4058
4059 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4060 if (!ibmvfc_transport_template)
4061 return -ENOMEM;
4062
4063 rc = vio_register_driver(&ibmvfc_driver);
4064 if (rc)
4065 fc_release_transport(ibmvfc_transport_template);
4066 return rc;
4067}
4068
4069/**
4070 * ibmvfc_module_exit - Teardown the ibmvfc module
4071 *
4072 * Return value:
4073 * nothing
4074 **/
4075static void __exit ibmvfc_module_exit(void)
4076{
4077 vio_unregister_driver(&ibmvfc_driver);
4078 fc_release_transport(ibmvfc_transport_template);
4079}
4080
4081module_init(ibmvfc_module_init);
4082module_exit(ibmvfc_module_exit);
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