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