blob: ea4abee7a2a95e8d783da6b7f82da2bc7f39aab8 [file] [log] [blame]
Brian King072b91f2008-07-01 13:14:30 -05001/*
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) "]");
Brian King545ef9a2009-03-20 15:44:37 -050078module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
Brian King072b91f2008-07-01 13:14:30 -050079MODULE_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" },
Brian King752b3232008-12-15 17:09:05 -0600104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
Brian King072b91f2008-07-01 13:14:30 -0500105 { 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" },
Brian King752b3232008-12-15 17:09:05 -0600118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
Brian King072b91f2008-07-01 13:14:30 -0500120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
Brian King752b3232008-12-15 17:09:05 -0600121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
Brian King072b91f2008-07-01 13:14:30 -0500123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
Brian King646d3852008-11-14 13:33:53 -0600124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
Brian King072b91f2008-07-01 13:14:30 -0500125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
126
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
138
139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
140};
141
142static void ibmvfc_npiv_login(struct ibmvfc_host *);
143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
145static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
146
147static const char *unknown_error = "unknown error";
148
149#ifdef CONFIG_SCSI_IBMVFC_TRACE
150/**
151 * ibmvfc_trc_start - Log a start trace entry
152 * @evt: ibmvfc event struct
153 *
154 **/
155static void ibmvfc_trc_start(struct ibmvfc_event *evt)
156{
157 struct ibmvfc_host *vhost = evt->vhost;
158 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
159 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
160 struct ibmvfc_trace_entry *entry;
161
162 entry = &vhost->trace[vhost->trace_index++];
163 entry->evt = evt;
164 entry->time = jiffies;
165 entry->fmt = evt->crq.format;
166 entry->type = IBMVFC_TRC_START;
167
168 switch (entry->fmt) {
169 case IBMVFC_CMD_FORMAT:
170 entry->op_code = vfc_cmd->iu.cdb[0];
171 entry->scsi_id = vfc_cmd->tgt_scsi_id;
172 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
173 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
174 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
175 break;
176 case IBMVFC_MAD_FORMAT:
177 entry->op_code = mad->opcode;
178 break;
179 default:
180 break;
181 };
182}
183
184/**
185 * ibmvfc_trc_end - Log an end trace entry
186 * @evt: ibmvfc event struct
187 *
188 **/
189static void ibmvfc_trc_end(struct ibmvfc_event *evt)
190{
191 struct ibmvfc_host *vhost = evt->vhost;
192 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
193 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
194 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
195
196 entry->evt = evt;
197 entry->time = jiffies;
198 entry->fmt = evt->crq.format;
199 entry->type = IBMVFC_TRC_END;
200
201 switch (entry->fmt) {
202 case IBMVFC_CMD_FORMAT:
203 entry->op_code = vfc_cmd->iu.cdb[0];
204 entry->scsi_id = vfc_cmd->tgt_scsi_id;
205 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
206 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
207 entry->u.end.status = vfc_cmd->status;
208 entry->u.end.error = vfc_cmd->error;
209 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
210 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
211 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
212 break;
213 case IBMVFC_MAD_FORMAT:
214 entry->op_code = mad->opcode;
215 entry->u.end.status = mad->status;
216 break;
217 default:
218 break;
219
220 };
221}
222
223#else
224#define ibmvfc_trc_start(evt) do { } while (0)
225#define ibmvfc_trc_end(evt) do { } while (0)
226#endif
227
228/**
229 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
230 * @status: status / error class
231 * @error: error
232 *
233 * Return value:
234 * index into cmd_status / -EINVAL on failure
235 **/
236static int ibmvfc_get_err_index(u16 status, u16 error)
237{
238 int i;
239
240 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
241 if ((cmd_status[i].status & status) == cmd_status[i].status &&
242 cmd_status[i].error == error)
243 return i;
244
245 return -EINVAL;
246}
247
248/**
249 * ibmvfc_get_cmd_error - Find the error description for the fcp response
250 * @status: status / error class
251 * @error: error
252 *
253 * Return value:
254 * error description string
255 **/
256static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
257{
258 int rc = ibmvfc_get_err_index(status, error);
259 if (rc >= 0)
260 return cmd_status[rc].name;
261 return unknown_error;
262}
263
264/**
265 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
266 * @vfc_cmd: ibmvfc command struct
267 *
268 * Return value:
269 * SCSI result value to return for completed command
270 **/
271static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
272{
273 int err;
274 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
275 int fc_rsp_len = rsp->fcp_rsp_len;
276
277 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
278 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
279 rsp->data.info.rsp_code))
280 return DID_ERROR << 16;
281
Brian King072b91f2008-07-01 13:14:30 -0500282 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
283 if (err >= 0)
284 return rsp->scsi_status | (cmd_status[err].result << 16);
285 return rsp->scsi_status | (DID_ERROR << 16);
286}
287
288/**
289 * ibmvfc_retry_cmd - Determine if error status is retryable
290 * @status: status / error class
291 * @error: error
292 *
293 * Return value:
294 * 1 if error should be retried / 0 if it should not
295 **/
296static int ibmvfc_retry_cmd(u16 status, u16 error)
297{
298 int rc = ibmvfc_get_err_index(status, error);
299
300 if (rc >= 0)
301 return cmd_status[rc].retry;
302 return 1;
303}
304
305static const char *unknown_fc_explain = "unknown fc explain";
306
307static const struct {
308 u16 fc_explain;
309 char *name;
310} ls_explain [] = {
311 { 0x00, "no additional explanation" },
312 { 0x01, "service parameter error - options" },
313 { 0x03, "service parameter error - initiator control" },
314 { 0x05, "service parameter error - recipient control" },
315 { 0x07, "service parameter error - received data field size" },
316 { 0x09, "service parameter error - concurrent seq" },
317 { 0x0B, "service parameter error - credit" },
318 { 0x0D, "invalid N_Port/F_Port_Name" },
319 { 0x0E, "invalid node/Fabric Name" },
320 { 0x0F, "invalid common service parameters" },
321 { 0x11, "invalid association header" },
322 { 0x13, "association header required" },
323 { 0x15, "invalid originator S_ID" },
324 { 0x17, "invalid OX_ID-RX-ID combination" },
325 { 0x19, "command (request) already in progress" },
326 { 0x1E, "N_Port Login requested" },
327 { 0x1F, "Invalid N_Port_ID" },
328};
329
330static const struct {
331 u16 fc_explain;
332 char *name;
333} gs_explain [] = {
334 { 0x00, "no additional explanation" },
335 { 0x01, "port identifier not registered" },
336 { 0x02, "port name not registered" },
337 { 0x03, "node name not registered" },
338 { 0x04, "class of service not registered" },
339 { 0x06, "initial process associator not registered" },
340 { 0x07, "FC-4 TYPEs not registered" },
341 { 0x08, "symbolic port name not registered" },
342 { 0x09, "symbolic node name not registered" },
343 { 0x0A, "port type not registered" },
344 { 0xF0, "authorization exception" },
345 { 0xF1, "authentication exception" },
346 { 0xF2, "data base full" },
347 { 0xF3, "data base empty" },
348 { 0xF4, "processing request" },
349 { 0xF5, "unable to verify connection" },
350 { 0xF6, "devices not in a common zone" },
351};
352
353/**
354 * ibmvfc_get_ls_explain - Return the FC Explain description text
355 * @status: FC Explain status
356 *
357 * Returns:
358 * error string
359 **/
360static const char *ibmvfc_get_ls_explain(u16 status)
361{
362 int i;
363
364 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
365 if (ls_explain[i].fc_explain == status)
366 return ls_explain[i].name;
367
368 return unknown_fc_explain;
369}
370
371/**
372 * ibmvfc_get_gs_explain - Return the FC Explain description text
373 * @status: FC Explain status
374 *
375 * Returns:
376 * error string
377 **/
378static const char *ibmvfc_get_gs_explain(u16 status)
379{
380 int i;
381
382 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
383 if (gs_explain[i].fc_explain == status)
384 return gs_explain[i].name;
385
386 return unknown_fc_explain;
387}
388
389static const struct {
390 enum ibmvfc_fc_type fc_type;
391 char *name;
392} fc_type [] = {
393 { IBMVFC_FABRIC_REJECT, "fabric reject" },
394 { IBMVFC_PORT_REJECT, "port reject" },
395 { IBMVFC_LS_REJECT, "ELS reject" },
396 { IBMVFC_FABRIC_BUSY, "fabric busy" },
397 { IBMVFC_PORT_BUSY, "port busy" },
398 { IBMVFC_BASIC_REJECT, "basic reject" },
399};
400
401static const char *unknown_fc_type = "unknown fc type";
402
403/**
404 * ibmvfc_get_fc_type - Return the FC Type description text
405 * @status: FC Type error status
406 *
407 * Returns:
408 * error string
409 **/
410static const char *ibmvfc_get_fc_type(u16 status)
411{
412 int i;
413
414 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
415 if (fc_type[i].fc_type == status)
416 return fc_type[i].name;
417
418 return unknown_fc_type;
419}
420
421/**
422 * ibmvfc_set_tgt_action - Set the next init action for the target
423 * @tgt: ibmvfc target struct
424 * @action: action to perform
425 *
426 **/
427static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
428 enum ibmvfc_target_action action)
429{
430 switch (tgt->action) {
431 case IBMVFC_TGT_ACTION_DEL_RPORT:
432 break;
433 default:
434 tgt->action = action;
435 break;
436 }
437}
438
439/**
440 * ibmvfc_set_host_state - Set the state for the host
441 * @vhost: ibmvfc host struct
442 * @state: state to set host to
443 *
444 * Returns:
445 * 0 if state changed / non-zero if not changed
446 **/
447static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
448 enum ibmvfc_host_state state)
449{
450 int rc = 0;
451
452 switch (vhost->state) {
453 case IBMVFC_HOST_OFFLINE:
454 rc = -EINVAL;
455 break;
456 default:
457 vhost->state = state;
458 break;
459 };
460
461 return rc;
462}
463
464/**
465 * ibmvfc_set_host_action - Set the next init action for the host
466 * @vhost: ibmvfc host struct
467 * @action: action to perform
468 *
469 **/
470static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
471 enum ibmvfc_host_action action)
472{
473 switch (action) {
474 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
475 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
476 vhost->action = action;
477 break;
478 case IBMVFC_HOST_ACTION_INIT_WAIT:
479 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
480 vhost->action = action;
481 break;
482 case IBMVFC_HOST_ACTION_QUERY:
483 switch (vhost->action) {
484 case IBMVFC_HOST_ACTION_INIT_WAIT:
485 case IBMVFC_HOST_ACTION_NONE:
486 case IBMVFC_HOST_ACTION_TGT_ADD:
487 vhost->action = action;
488 break;
489 default:
490 break;
491 };
492 break;
493 case IBMVFC_HOST_ACTION_TGT_INIT:
494 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
495 vhost->action = action;
496 break;
497 case IBMVFC_HOST_ACTION_INIT:
498 case IBMVFC_HOST_ACTION_TGT_DEL:
499 case IBMVFC_HOST_ACTION_QUERY_TGTS:
Brian King10e79492008-10-29 08:46:45 -0500500 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -0500501 case IBMVFC_HOST_ACTION_TGT_ADD:
502 case IBMVFC_HOST_ACTION_NONE:
503 default:
504 vhost->action = action;
505 break;
506 };
507}
508
509/**
510 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
511 * @vhost: ibmvfc host struct
512 *
513 * Return value:
514 * nothing
515 **/
516static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
517{
518 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
Brian King2d0da2a2008-07-22 08:31:42 -0500519 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
520 scsi_block_requests(vhost->host);
521 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
522 }
Brian King072b91f2008-07-01 13:14:30 -0500523 } else
524 vhost->reinit = 1;
525
526 wake_up(&vhost->work_wait_q);
527}
528
529/**
530 * ibmvfc_link_down - Handle a link down event from the adapter
531 * @vhost: ibmvfc host struct
532 * @state: ibmvfc host state to enter
533 *
534 **/
535static void ibmvfc_link_down(struct ibmvfc_host *vhost,
536 enum ibmvfc_host_state state)
537{
538 struct ibmvfc_target *tgt;
539
540 ENTER;
541 scsi_block_requests(vhost->host);
542 list_for_each_entry(tgt, &vhost->targets, queue)
543 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
544 ibmvfc_set_host_state(vhost, state);
545 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
546 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
547 wake_up(&vhost->work_wait_q);
548 LEAVE;
549}
550
551/**
552 * ibmvfc_init_host - Start host initialization
553 * @vhost: ibmvfc host struct
Brian Kingcf6f10d2008-08-15 10:59:23 -0500554 * @relogin: is this a re-login?
Brian King072b91f2008-07-01 13:14:30 -0500555 *
556 * Return value:
557 * nothing
558 **/
Brian Kingcf6f10d2008-08-15 10:59:23 -0500559static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
Brian King072b91f2008-07-01 13:14:30 -0500560{
561 struct ibmvfc_target *tgt;
562
563 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
Brian King1c41fa822008-12-03 11:02:54 -0600564 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
Brian King072b91f2008-07-01 13:14:30 -0500565 dev_err(vhost->dev,
566 "Host initialization retries exceeded. Taking adapter offline\n");
567 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
568 return;
569 }
570 }
571
572 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
Brian Kingcf6f10d2008-08-15 10:59:23 -0500573 if (!relogin) {
574 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
575 vhost->async_crq.cur = 0;
576 }
577
Brian King072b91f2008-07-01 13:14:30 -0500578 list_for_each_entry(tgt, &vhost->targets, queue)
579 tgt->need_login = 1;
580 scsi_block_requests(vhost->host);
581 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
582 vhost->job_step = ibmvfc_npiv_login;
583 wake_up(&vhost->work_wait_q);
584 }
585}
586
587/**
588 * ibmvfc_send_crq - Send a CRQ
589 * @vhost: ibmvfc host struct
590 * @word1: the first 64 bits of the data
591 * @word2: the second 64 bits of the data
592 *
593 * Return value:
594 * 0 on success / other on failure
595 **/
596static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
597{
598 struct vio_dev *vdev = to_vio_dev(vhost->dev);
599 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
600}
601
602/**
603 * ibmvfc_send_crq_init - Send a CRQ init message
604 * @vhost: ibmvfc host struct
605 *
606 * Return value:
607 * 0 on success / other on failure
608 **/
609static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
610{
611 ibmvfc_dbg(vhost, "Sending CRQ init\n");
612 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
613}
614
615/**
616 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
617 * @vhost: ibmvfc host struct
618 *
619 * Return value:
620 * 0 on success / other on failure
621 **/
622static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
623{
624 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
625 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
626}
627
628/**
629 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
630 * @vhost: ibmvfc host struct
631 *
632 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
633 * the crq with the hypervisor.
634 **/
635static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
636{
637 long rc;
638 struct vio_dev *vdev = to_vio_dev(vhost->dev);
639 struct ibmvfc_crq_queue *crq = &vhost->crq;
640
641 ibmvfc_dbg(vhost, "Releasing CRQ\n");
642 free_irq(vdev->irq, vhost);
Brian King039a0892009-03-20 15:44:35 -0500643 tasklet_kill(&vhost->tasklet);
Brian King072b91f2008-07-01 13:14:30 -0500644 do {
645 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
646 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
647
648 vhost->state = IBMVFC_NO_CRQ;
649 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
650 free_page((unsigned long)crq->msgs);
651}
652
653/**
654 * ibmvfc_reenable_crq_queue - reenables the CRQ
655 * @vhost: ibmvfc host struct
656 *
657 * Return value:
658 * 0 on success / other on failure
659 **/
660static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
661{
662 int rc;
663 struct vio_dev *vdev = to_vio_dev(vhost->dev);
664
665 /* Re-enable the CRQ */
666 do {
667 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
668 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
669
670 if (rc)
671 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
672
673 return rc;
674}
675
676/**
677 * ibmvfc_reset_crq - resets a crq after a failure
678 * @vhost: ibmvfc host struct
679 *
680 * Return value:
681 * 0 on success / other on failure
682 **/
683static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
684{
685 int rc;
686 struct vio_dev *vdev = to_vio_dev(vhost->dev);
687 struct ibmvfc_crq_queue *crq = &vhost->crq;
688
689 /* Close the CRQ */
690 do {
691 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
692 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
693
694 vhost->state = IBMVFC_NO_CRQ;
695 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
696
697 /* Clean out the queue */
698 memset(crq->msgs, 0, PAGE_SIZE);
699 crq->cur = 0;
700
701 /* And re-open it again */
702 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
703 crq->msg_token, PAGE_SIZE);
704
705 if (rc == H_CLOSED)
706 /* Adapter is good, but other end is not ready */
707 dev_warn(vhost->dev, "Partner adapter not ready\n");
708 else if (rc != 0)
709 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
710
711 return rc;
712}
713
714/**
715 * ibmvfc_valid_event - Determines if event is valid.
716 * @pool: event_pool that contains the event
717 * @evt: ibmvfc event to be checked for validity
718 *
719 * Return value:
720 * 1 if event is valid / 0 if event is not valid
721 **/
722static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
723 struct ibmvfc_event *evt)
724{
725 int index = evt - pool->events;
726 if (index < 0 || index >= pool->size) /* outside of bounds */
727 return 0;
728 if (evt != pool->events + index) /* unaligned */
729 return 0;
730 return 1;
731}
732
733/**
734 * ibmvfc_free_event - Free the specified event
735 * @evt: ibmvfc_event to be freed
736 *
737 **/
738static void ibmvfc_free_event(struct ibmvfc_event *evt)
739{
740 struct ibmvfc_host *vhost = evt->vhost;
741 struct ibmvfc_event_pool *pool = &vhost->pool;
742
743 BUG_ON(!ibmvfc_valid_event(pool, evt));
744 BUG_ON(atomic_inc_return(&evt->free) != 1);
745 list_add_tail(&evt->queue, &vhost->free);
746}
747
748/**
749 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
750 * @evt: ibmvfc event struct
751 *
752 * This function does not setup any error status, that must be done
753 * before this function gets called.
754 **/
755static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
756{
757 struct scsi_cmnd *cmnd = evt->cmnd;
758
759 if (cmnd) {
760 scsi_dma_unmap(cmnd);
761 cmnd->scsi_done(cmnd);
762 }
763
Brian Kingad8dcff2008-10-29 08:46:41 -0500764 if (evt->eh_comp)
765 complete(evt->eh_comp);
766
Brian King072b91f2008-07-01 13:14:30 -0500767 ibmvfc_free_event(evt);
768}
769
770/**
771 * ibmvfc_fail_request - Fail request with specified error code
772 * @evt: ibmvfc event struct
773 * @error_code: error code to fail request with
774 *
775 * Return value:
776 * none
777 **/
778static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
779{
780 if (evt->cmnd) {
781 evt->cmnd->result = (error_code << 16);
782 evt->done = ibmvfc_scsi_eh_done;
783 } else
784 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
785
786 list_del(&evt->queue);
787 del_timer(&evt->timer);
788 ibmvfc_trc_end(evt);
789 evt->done(evt);
790}
791
792/**
793 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
794 * @vhost: ibmvfc host struct
795 * @error_code: error code to fail requests with
796 *
797 * Return value:
798 * none
799 **/
800static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
801{
802 struct ibmvfc_event *evt, *pos;
803
804 ibmvfc_dbg(vhost, "Purging all requests\n");
805 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
806 ibmvfc_fail_request(evt, error_code);
807}
808
809/**
810 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
811 * @vhost: struct ibmvfc host to reset
812 **/
813static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
814{
815 int rc;
816
817 scsi_block_requests(vhost->host);
818 ibmvfc_purge_requests(vhost, DID_ERROR);
819 if ((rc = ibmvfc_reset_crq(vhost)) ||
820 (rc = ibmvfc_send_crq_init(vhost)) ||
821 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
822 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
823 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
824 } else
825 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
826}
827
828/**
829 * ibmvfc_reset_host - Reset the connection to the server
830 * @vhost: struct ibmvfc host to reset
831 **/
832static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
833{
834 unsigned long flags;
835
836 spin_lock_irqsave(vhost->host->host_lock, flags);
837 __ibmvfc_reset_host(vhost);
838 spin_unlock_irqrestore(vhost->host->host_lock, flags);
839}
840
841/**
842 * ibmvfc_retry_host_init - Retry host initialization if allowed
843 * @vhost: ibmvfc host struct
844 *
845 **/
846static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
847{
848 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
Brian King1c41fa822008-12-03 11:02:54 -0600849 vhost->delay_init = 1;
850 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
Brian King072b91f2008-07-01 13:14:30 -0500851 dev_err(vhost->dev,
852 "Host initialization retries exceeded. Taking adapter offline\n");
853 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
Brian King1c41fa822008-12-03 11:02:54 -0600854 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
Brian King072b91f2008-07-01 13:14:30 -0500855 __ibmvfc_reset_host(vhost);
856 else
857 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
858 }
859
860 wake_up(&vhost->work_wait_q);
861}
862
863/**
Brian Kingb3c10489c2008-07-22 08:31:41 -0500864 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
Brian King072b91f2008-07-01 13:14:30 -0500865 * @starget: scsi target struct
866 *
867 * Return value:
868 * ibmvfc_target struct / NULL if not found
869 **/
Brian Kingb3c10489c2008-07-22 08:31:41 -0500870static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
Brian King072b91f2008-07-01 13:14:30 -0500871{
872 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
873 struct ibmvfc_host *vhost = shost_priv(shost);
874 struct ibmvfc_target *tgt;
875
876 list_for_each_entry(tgt, &vhost->targets, queue)
Brian Kingb3c10489c2008-07-22 08:31:41 -0500877 if (tgt->target_id == starget->id) {
878 kref_get(&tgt->kref);
Brian King072b91f2008-07-01 13:14:30 -0500879 return tgt;
Brian Kingb3c10489c2008-07-22 08:31:41 -0500880 }
Brian King072b91f2008-07-01 13:14:30 -0500881 return NULL;
882}
883
884/**
Brian Kingb3c10489c2008-07-22 08:31:41 -0500885 * ibmvfc_get_target - Find the specified scsi_target
Brian King072b91f2008-07-01 13:14:30 -0500886 * @starget: scsi target struct
887 *
888 * Return value:
889 * ibmvfc_target struct / NULL if not found
890 **/
Brian Kingb3c10489c2008-07-22 08:31:41 -0500891static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
Brian King072b91f2008-07-01 13:14:30 -0500892{
893 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
894 struct ibmvfc_target *tgt;
895 unsigned long flags;
896
897 spin_lock_irqsave(shost->host_lock, flags);
Brian Kingb3c10489c2008-07-22 08:31:41 -0500898 tgt = __ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -0500899 spin_unlock_irqrestore(shost->host_lock, flags);
900 return tgt;
901}
902
903/**
904 * ibmvfc_get_host_speed - Get host port speed
905 * @shost: scsi host struct
906 *
907 * Return value:
908 * none
909 **/
910static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
911{
912 struct ibmvfc_host *vhost = shost_priv(shost);
913 unsigned long flags;
914
915 spin_lock_irqsave(shost->host_lock, flags);
916 if (vhost->state == IBMVFC_ACTIVE) {
917 switch (vhost->login_buf->resp.link_speed / 100) {
918 case 1:
919 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
920 break;
921 case 2:
922 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
923 break;
924 case 4:
925 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
926 break;
927 case 8:
928 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
929 break;
930 case 10:
931 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
932 break;
933 case 16:
934 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
935 break;
936 default:
Stephen Rothwell775a42e2009-01-06 14:59:00 +0000937 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
Brian King072b91f2008-07-01 13:14:30 -0500938 vhost->login_buf->resp.link_speed / 100);
939 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
940 break;
941 }
942 } else
943 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
944 spin_unlock_irqrestore(shost->host_lock, flags);
945}
946
947/**
948 * ibmvfc_get_host_port_state - Get host port state
949 * @shost: scsi host struct
950 *
951 * Return value:
952 * none
953 **/
954static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
955{
956 struct ibmvfc_host *vhost = shost_priv(shost);
957 unsigned long flags;
958
959 spin_lock_irqsave(shost->host_lock, flags);
960 switch (vhost->state) {
961 case IBMVFC_INITIALIZING:
962 case IBMVFC_ACTIVE:
963 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
964 break;
965 case IBMVFC_LINK_DOWN:
966 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
967 break;
968 case IBMVFC_LINK_DEAD:
969 case IBMVFC_HOST_OFFLINE:
970 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
971 break;
972 case IBMVFC_HALTED:
973 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
974 break;
Brian King0ae808e2008-07-22 08:31:39 -0500975 case IBMVFC_NO_CRQ:
976 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
977 break;
Brian King072b91f2008-07-01 13:14:30 -0500978 default:
979 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
980 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
981 break;
982 }
983 spin_unlock_irqrestore(shost->host_lock, flags);
984}
985
986/**
987 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
988 * @rport: rport struct
989 * @timeout: timeout value
990 *
991 * Return value:
992 * none
993 **/
994static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
995{
996 if (timeout)
997 rport->dev_loss_tmo = timeout;
998 else
999 rport->dev_loss_tmo = 1;
1000}
1001
1002/**
Brian Kingb3c10489c2008-07-22 08:31:41 -05001003 * ibmvfc_release_tgt - Free memory allocated for a target
1004 * @kref: kref struct
1005 *
1006 **/
1007static void ibmvfc_release_tgt(struct kref *kref)
1008{
1009 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1010 kfree(tgt);
1011}
1012
1013/**
Brian King072b91f2008-07-01 13:14:30 -05001014 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1015 * @starget: scsi target struct
1016 *
1017 * Return value:
1018 * none
1019 **/
1020static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1021{
Brian Kingb3c10489c2008-07-22 08:31:41 -05001022 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -05001023 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
Brian Kingb3c10489c2008-07-22 08:31:41 -05001024 if (tgt)
1025 kref_put(&tgt->kref, ibmvfc_release_tgt);
Brian King072b91f2008-07-01 13:14:30 -05001026}
1027
1028/**
1029 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1030 * @starget: scsi target struct
1031 *
1032 * Return value:
1033 * none
1034 **/
1035static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1036{
Brian Kingb3c10489c2008-07-22 08:31:41 -05001037 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -05001038 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
Brian Kingb3c10489c2008-07-22 08:31:41 -05001039 if (tgt)
1040 kref_put(&tgt->kref, ibmvfc_release_tgt);
Brian King072b91f2008-07-01 13:14:30 -05001041}
1042
1043/**
1044 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1045 * @starget: scsi target struct
1046 *
1047 * Return value:
1048 * none
1049 **/
1050static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1051{
Brian Kingb3c10489c2008-07-22 08:31:41 -05001052 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -05001053 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
Brian Kingb3c10489c2008-07-22 08:31:41 -05001054 if (tgt)
1055 kref_put(&tgt->kref, ibmvfc_release_tgt);
Brian King072b91f2008-07-01 13:14:30 -05001056}
1057
1058/**
1059 * ibmvfc_wait_while_resetting - Wait while the host resets
1060 * @vhost: ibmvfc host struct
1061 *
1062 * Return value:
1063 * 0 on success / other on failure
1064 **/
1065static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1066{
1067 long timeout = wait_event_timeout(vhost->init_wait_q,
Brian King3eddc562008-08-15 10:59:21 -05001068 ((vhost->state == IBMVFC_ACTIVE ||
1069 vhost->state == IBMVFC_HOST_OFFLINE ||
1070 vhost->state == IBMVFC_LINK_DEAD) &&
1071 vhost->action == IBMVFC_HOST_ACTION_NONE),
Brian King072b91f2008-07-01 13:14:30 -05001072 (init_timeout * HZ));
1073
1074 return timeout ? 0 : -EIO;
1075}
1076
1077/**
1078 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1079 * @shost: scsi host struct
1080 *
1081 * Return value:
1082 * 0 on success / other on failure
1083 **/
1084static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1085{
1086 struct ibmvfc_host *vhost = shost_priv(shost);
1087
1088 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1089 ibmvfc_reset_host(vhost);
1090 return ibmvfc_wait_while_resetting(vhost);
1091}
1092
1093/**
1094 * ibmvfc_gather_partition_info - Gather info about the LPAR
1095 *
1096 * Return value:
1097 * none
1098 **/
1099static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1100{
1101 struct device_node *rootdn;
1102 const char *name;
1103 const unsigned int *num;
1104
1105 rootdn = of_find_node_by_path("/");
1106 if (!rootdn)
1107 return;
1108
1109 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1110 if (name)
1111 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1112 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1113 if (num)
1114 vhost->partition_number = *num;
1115 of_node_put(rootdn);
1116}
1117
1118/**
1119 * ibmvfc_set_login_info - Setup info for NPIV login
1120 * @vhost: ibmvfc host struct
1121 *
1122 * Return value:
1123 * none
1124 **/
1125static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1126{
1127 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1128 struct device_node *of_node = vhost->dev->archdata.of_node;
1129 const char *location;
1130
1131 memset(login_info, 0, sizeof(*login_info));
1132
1133 login_info->ostype = IBMVFC_OS_LINUX;
1134 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1135 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1136 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1137 login_info->partition_num = vhost->partition_number;
1138 login_info->vfc_frame_version = 1;
1139 login_info->fcp_version = 3;
1140 if (vhost->client_migrated)
1141 login_info->flags = IBMVFC_CLIENT_MIGRATED;
1142
1143 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1144 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1145 login_info->async.va = vhost->async_crq.msg_token;
Brian King52d7e862008-07-22 08:31:46 -05001146 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
Brian King072b91f2008-07-01 13:14:30 -05001147 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1148 strncpy(login_info->device_name,
Kay Sievers71610f52008-12-03 22:41:36 +01001149 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
Brian King072b91f2008-07-01 13:14:30 -05001150
1151 location = of_get_property(of_node, "ibm,loc-code", NULL);
Kay Sievers71610f52008-12-03 22:41:36 +01001152 location = location ? location : dev_name(vhost->dev);
Brian King072b91f2008-07-01 13:14:30 -05001153 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1154}
1155
1156/**
1157 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1158 * @vhost: ibmvfc host who owns the event pool
1159 *
1160 * Returns zero on success.
1161 **/
1162static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1163{
1164 int i;
1165 struct ibmvfc_event_pool *pool = &vhost->pool;
1166
1167 ENTER;
1168 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1169 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1170 if (!pool->events)
1171 return -ENOMEM;
1172
1173 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1174 pool->size * sizeof(*pool->iu_storage),
1175 &pool->iu_token, 0);
1176
1177 if (!pool->iu_storage) {
1178 kfree(pool->events);
1179 return -ENOMEM;
1180 }
1181
1182 for (i = 0; i < pool->size; ++i) {
1183 struct ibmvfc_event *evt = &pool->events[i];
1184 atomic_set(&evt->free, 1);
1185 evt->crq.valid = 0x80;
1186 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1187 evt->xfer_iu = pool->iu_storage + i;
1188 evt->vhost = vhost;
1189 evt->ext_list = NULL;
1190 list_add_tail(&evt->queue, &vhost->free);
1191 }
1192
1193 LEAVE;
1194 return 0;
1195}
1196
1197/**
1198 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1199 * @vhost: ibmvfc host who owns the event pool
1200 *
1201 **/
1202static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1203{
1204 int i;
1205 struct ibmvfc_event_pool *pool = &vhost->pool;
1206
1207 ENTER;
1208 for (i = 0; i < pool->size; ++i) {
1209 list_del(&pool->events[i].queue);
1210 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1211 if (pool->events[i].ext_list)
1212 dma_pool_free(vhost->sg_pool,
1213 pool->events[i].ext_list,
1214 pool->events[i].ext_list_token);
1215 }
1216
1217 kfree(pool->events);
1218 dma_free_coherent(vhost->dev,
1219 pool->size * sizeof(*pool->iu_storage),
1220 pool->iu_storage, pool->iu_token);
1221 LEAVE;
1222}
1223
1224/**
1225 * ibmvfc_get_event - Gets the next free event in pool
1226 * @vhost: ibmvfc host struct
1227 *
1228 * Returns a free event from the pool.
1229 **/
1230static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1231{
1232 struct ibmvfc_event *evt;
1233
1234 BUG_ON(list_empty(&vhost->free));
1235 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1236 atomic_set(&evt->free, 0);
1237 list_del(&evt->queue);
1238 return evt;
1239}
1240
1241/**
1242 * ibmvfc_init_event - Initialize fields in an event struct that are always
1243 * required.
1244 * @evt: The event
1245 * @done: Routine to call when the event is responded to
1246 * @format: SRP or MAD format
1247 **/
1248static void ibmvfc_init_event(struct ibmvfc_event *evt,
1249 void (*done) (struct ibmvfc_event *), u8 format)
1250{
1251 evt->cmnd = NULL;
1252 evt->sync_iu = NULL;
1253 evt->crq.format = format;
1254 evt->done = done;
Brian Kingad8dcff2008-10-29 08:46:41 -05001255 evt->eh_comp = NULL;
Brian King072b91f2008-07-01 13:14:30 -05001256}
1257
1258/**
1259 * ibmvfc_map_sg_list - Initialize scatterlist
1260 * @scmd: scsi command struct
1261 * @nseg: number of scatterlist segments
1262 * @md: memory descriptor list to initialize
1263 **/
1264static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1265 struct srp_direct_buf *md)
1266{
1267 int i;
1268 struct scatterlist *sg;
1269
1270 scsi_for_each_sg(scmd, sg, nseg, i) {
1271 md[i].va = sg_dma_address(sg);
1272 md[i].len = sg_dma_len(sg);
1273 md[i].key = 0;
1274 }
1275}
1276
1277/**
1278 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1279 * @scmd: Scsi_Cmnd with the scatterlist
1280 * @evt: ibmvfc event struct
1281 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1282 * @dev: device for which to map dma memory
1283 *
1284 * Returns:
1285 * 0 on success / non-zero on failure
1286 **/
1287static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1288 struct ibmvfc_event *evt,
1289 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1290{
1291
1292 int sg_mapped;
1293 struct srp_direct_buf *data = &vfc_cmd->ioba;
1294 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1295
1296 sg_mapped = scsi_dma_map(scmd);
1297 if (!sg_mapped) {
1298 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1299 return 0;
1300 } else if (unlikely(sg_mapped < 0)) {
1301 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1302 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1303 return sg_mapped;
1304 }
1305
1306 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1307 vfc_cmd->flags |= IBMVFC_WRITE;
1308 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1309 } else {
1310 vfc_cmd->flags |= IBMVFC_READ;
1311 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1312 }
1313
1314 if (sg_mapped == 1) {
1315 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1316 return 0;
1317 }
1318
1319 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1320
1321 if (!evt->ext_list) {
1322 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1323 &evt->ext_list_token);
1324
1325 if (!evt->ext_list) {
Brian King64b840d2009-01-22 15:45:38 -06001326 scsi_dma_unmap(scmd);
1327 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1328 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
Brian King072b91f2008-07-01 13:14:30 -05001329 return -ENOMEM;
1330 }
1331 }
1332
1333 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1334
1335 data->va = evt->ext_list_token;
1336 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1337 data->key = 0;
1338 return 0;
1339}
1340
1341/**
1342 * ibmvfc_timeout - Internal command timeout handler
1343 * @evt: struct ibmvfc_event that timed out
1344 *
1345 * Called when an internally generated command times out
1346 **/
1347static void ibmvfc_timeout(struct ibmvfc_event *evt)
1348{
1349 struct ibmvfc_host *vhost = evt->vhost;
1350 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1351 ibmvfc_reset_host(vhost);
1352}
1353
1354/**
1355 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1356 * @evt: event to be sent
1357 * @vhost: ibmvfc host struct
1358 * @timeout: timeout in seconds - 0 means do not time command
1359 *
1360 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1361 **/
1362static int ibmvfc_send_event(struct ibmvfc_event *evt,
1363 struct ibmvfc_host *vhost, unsigned long timeout)
1364{
1365 u64 *crq_as_u64 = (u64 *) &evt->crq;
1366 int rc;
1367
1368 /* Copy the IU into the transfer area */
1369 *evt->xfer_iu = evt->iu;
1370 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1371 evt->xfer_iu->cmd.tag = (u64)evt;
1372 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1373 evt->xfer_iu->mad_common.tag = (u64)evt;
1374 else
1375 BUG();
1376
1377 list_add_tail(&evt->queue, &vhost->sent);
1378 init_timer(&evt->timer);
1379
1380 if (timeout) {
1381 evt->timer.data = (unsigned long) evt;
1382 evt->timer.expires = jiffies + (timeout * HZ);
1383 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1384 add_timer(&evt->timer);
1385 }
1386
Brian Kinga528ab72008-12-03 11:02:56 -06001387 mb();
1388
Brian King072b91f2008-07-01 13:14:30 -05001389 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1390 list_del(&evt->queue);
1391 del_timer(&evt->timer);
1392
1393 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1394 * Firmware will send a CRQ with a transport event (0xFF) to
1395 * tell this client what has happened to the transport. This
1396 * will be handled in ibmvfc_handle_crq()
1397 */
1398 if (rc == H_CLOSED) {
1399 if (printk_ratelimit())
1400 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1401 if (evt->cmnd)
1402 scsi_dma_unmap(evt->cmnd);
1403 ibmvfc_free_event(evt);
1404 return SCSI_MLQUEUE_HOST_BUSY;
1405 }
1406
1407 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1408 if (evt->cmnd) {
1409 evt->cmnd->result = DID_ERROR << 16;
1410 evt->done = ibmvfc_scsi_eh_done;
1411 } else
1412 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1413
1414 evt->done(evt);
1415 } else
1416 ibmvfc_trc_start(evt);
1417
1418 return 0;
1419}
1420
1421/**
1422 * ibmvfc_log_error - Log an error for the failed command if appropriate
1423 * @evt: ibmvfc event to log
1424 *
1425 **/
1426static void ibmvfc_log_error(struct ibmvfc_event *evt)
1427{
1428 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1429 struct ibmvfc_host *vhost = evt->vhost;
1430 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1431 struct scsi_cmnd *cmnd = evt->cmnd;
1432 const char *err = unknown_error;
1433 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1434 int logerr = 0;
1435 int rsp_code = 0;
1436
1437 if (index >= 0) {
1438 logerr = cmd_status[index].log;
1439 err = cmd_status[index].name;
1440 }
1441
Brian King0ae808e2008-07-22 08:31:39 -05001442 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
Brian King072b91f2008-07-01 13:14:30 -05001443 return;
1444
1445 if (rsp->flags & FCP_RSP_LEN_VALID)
1446 rsp_code = rsp->data.info.rsp_code;
1447
1448 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1449 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1450 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1451 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1452}
1453
1454/**
1455 * ibmvfc_scsi_done - Handle responses from commands
1456 * @evt: ibmvfc event to be handled
1457 *
1458 * Used as a callback when sending scsi cmds.
1459 **/
1460static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1461{
1462 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1464 struct scsi_cmnd *cmnd = evt->cmnd;
Brian King2bac4062008-08-15 10:59:26 -05001465 u32 rsp_len = 0;
1466 u32 sense_len = rsp->fcp_sense_len;
Brian King072b91f2008-07-01 13:14:30 -05001467
1468 if (cmnd) {
1469 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1470 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1471 else if (rsp->flags & FCP_RESID_UNDER)
1472 scsi_set_resid(cmnd, rsp->fcp_resid);
1473 else
1474 scsi_set_resid(cmnd, 0);
1475
1476 if (vfc_cmd->status) {
1477 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1478
1479 if (rsp->flags & FCP_RSP_LEN_VALID)
1480 rsp_len = rsp->fcp_rsp_len;
1481 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1482 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
Brian King2bac4062008-08-15 10:59:26 -05001483 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
Brian King072b91f2008-07-01 13:14:30 -05001484 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
Brian King646d3852008-11-14 13:33:53 -06001485 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
1486 ibmvfc_reinit_host(evt->vhost);
Brian King072b91f2008-07-01 13:14:30 -05001487
Brian King50119da2008-10-29 08:46:36 -05001488 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1489 cmnd->result = (DID_ERROR << 16);
1490
Brian King072b91f2008-07-01 13:14:30 -05001491 ibmvfc_log_error(evt);
1492 }
1493
1494 if (!cmnd->result &&
1495 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1496 cmnd->result = (DID_ERROR << 16);
1497
1498 scsi_dma_unmap(cmnd);
1499 cmnd->scsi_done(cmnd);
1500 }
1501
Brian Kingad8dcff2008-10-29 08:46:41 -05001502 if (evt->eh_comp)
1503 complete(evt->eh_comp);
1504
Brian King072b91f2008-07-01 13:14:30 -05001505 ibmvfc_free_event(evt);
1506}
1507
1508/**
1509 * ibmvfc_host_chkready - Check if the host can accept commands
1510 * @vhost: struct ibmvfc host
1511 *
1512 * Returns:
1513 * 1 if host can accept command / 0 if not
1514 **/
1515static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1516{
1517 int result = 0;
1518
1519 switch (vhost->state) {
1520 case IBMVFC_LINK_DEAD:
1521 case IBMVFC_HOST_OFFLINE:
1522 result = DID_NO_CONNECT << 16;
1523 break;
1524 case IBMVFC_NO_CRQ:
1525 case IBMVFC_INITIALIZING:
1526 case IBMVFC_HALTED:
1527 case IBMVFC_LINK_DOWN:
1528 result = DID_REQUEUE << 16;
1529 break;
1530 case IBMVFC_ACTIVE:
1531 result = 0;
1532 break;
1533 };
1534
1535 return result;
1536}
1537
1538/**
1539 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1540 * @cmnd: struct scsi_cmnd to be executed
1541 * @done: Callback function to be called when cmnd is completed
1542 *
1543 * Returns:
1544 * 0 on success / other on failure
1545 **/
1546static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1547 void (*done) (struct scsi_cmnd *))
1548{
1549 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1550 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1551 struct ibmvfc_cmd *vfc_cmd;
1552 struct ibmvfc_event *evt;
1553 u8 tag[2];
1554 int rc;
1555
1556 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1557 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1558 cmnd->result = rc;
1559 done(cmnd);
1560 return 0;
1561 }
1562
1563 cmnd->result = (DID_OK << 16);
1564 evt = ibmvfc_get_event(vhost);
1565 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1566 evt->cmnd = cmnd;
1567 cmnd->scsi_done = done;
1568 vfc_cmd = &evt->iu.cmd;
1569 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1570 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1571 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1572 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1573 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1574 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1575 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1576 vfc_cmd->tgt_scsi_id = rport->port_id;
Brian King072b91f2008-07-01 13:14:30 -05001577 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1578 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1579 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1580
1581 if (scsi_populate_tag_msg(cmnd, tag)) {
1582 vfc_cmd->task_tag = tag[1];
1583 switch (tag[0]) {
1584 case MSG_SIMPLE_TAG:
1585 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1586 break;
1587 case MSG_HEAD_TAG:
1588 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1589 break;
1590 case MSG_ORDERED_TAG:
1591 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1592 break;
1593 };
1594 }
1595
1596 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1597 return ibmvfc_send_event(evt, vhost, 0);
1598
1599 ibmvfc_free_event(evt);
1600 if (rc == -ENOMEM)
1601 return SCSI_MLQUEUE_HOST_BUSY;
1602
1603 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1604 scmd_printk(KERN_ERR, cmnd,
1605 "Failed to map DMA buffer for command. rc=%d\n", rc);
1606
1607 cmnd->result = DID_ERROR << 16;
1608 done(cmnd);
1609 return 0;
1610}
1611
1612/**
1613 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1614 * @evt: ibmvfc event struct
1615 *
1616 **/
1617static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1618{
1619 /* copy the response back */
1620 if (evt->sync_iu)
1621 *evt->sync_iu = *evt->xfer_iu;
1622
1623 complete(&evt->comp);
1624}
1625
1626/**
1627 * ibmvfc_reset_device - Reset the device with the specified reset type
1628 * @sdev: scsi device to reset
1629 * @type: reset type
1630 * @desc: reset type description for log messages
1631 *
1632 * Returns:
1633 * 0 on success / other on failure
1634 **/
1635static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1636{
1637 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1638 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1639 struct ibmvfc_cmd *tmf;
Brian King50ed9a02008-10-29 08:46:47 -05001640 struct ibmvfc_event *evt = NULL;
Brian King072b91f2008-07-01 13:14:30 -05001641 union ibmvfc_iu rsp_iu;
1642 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1643 int rsp_rc = -EBUSY;
1644 unsigned long flags;
1645 int rsp_code = 0;
1646
1647 spin_lock_irqsave(vhost->host->host_lock, flags);
1648 if (vhost->state == IBMVFC_ACTIVE) {
1649 evt = ibmvfc_get_event(vhost);
1650 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1651
1652 tmf = &evt->iu.cmd;
1653 memset(tmf, 0, sizeof(*tmf));
1654 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1655 tmf->resp.len = sizeof(tmf->rsp);
1656 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1657 tmf->payload_len = sizeof(tmf->iu);
1658 tmf->resp_len = sizeof(tmf->rsp);
1659 tmf->cancel_key = (unsigned long)sdev->hostdata;
1660 tmf->tgt_scsi_id = rport->port_id;
1661 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1662 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1663 tmf->iu.tmf_flags = type;
1664 evt->sync_iu = &rsp_iu;
1665
1666 init_completion(&evt->comp);
1667 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1668 }
1669 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1670
1671 if (rsp_rc != 0) {
1672 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1673 desc, rsp_rc);
1674 return -EIO;
1675 }
1676
1677 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1678 wait_for_completion(&evt->comp);
1679
1680 if (rsp_iu.cmd.status) {
1681 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1682 rsp_code = fc_rsp->data.info.rsp_code;
1683
1684 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1685 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1686 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1687 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1688 fc_rsp->scsi_status);
1689 rsp_rc = -EIO;
1690 } else
1691 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1692
1693 spin_lock_irqsave(vhost->host->host_lock, flags);
1694 ibmvfc_free_event(evt);
1695 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1696 return rsp_rc;
1697}
1698
1699/**
1700 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1701 * @sdev: scsi device to abort commands
1702 *
1703 * This sends an Abort Task Set to the VIOS for the specified device. This does
1704 * NOT send any cancel to the VIOS. That must be done separately.
1705 *
1706 * Returns:
1707 * 0 on success / other on failure
1708 **/
1709static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1710{
1711 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1712 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1713 struct ibmvfc_cmd *tmf;
1714 struct ibmvfc_event *evt, *found_evt;
1715 union ibmvfc_iu rsp_iu;
1716 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1717 int rsp_rc = -EBUSY;
1718 unsigned long flags;
1719 int rsp_code = 0;
1720
1721 spin_lock_irqsave(vhost->host->host_lock, flags);
1722 found_evt = NULL;
1723 list_for_each_entry(evt, &vhost->sent, queue) {
1724 if (evt->cmnd && evt->cmnd->device == sdev) {
1725 found_evt = evt;
1726 break;
1727 }
1728 }
1729
1730 if (!found_evt) {
1731 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1732 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1733 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1734 return 0;
1735 }
1736
1737 if (vhost->state == IBMVFC_ACTIVE) {
1738 evt = ibmvfc_get_event(vhost);
1739 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1740
1741 tmf = &evt->iu.cmd;
1742 memset(tmf, 0, sizeof(*tmf));
1743 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1744 tmf->resp.len = sizeof(tmf->rsp);
1745 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1746 tmf->payload_len = sizeof(tmf->iu);
1747 tmf->resp_len = sizeof(tmf->rsp);
1748 tmf->cancel_key = (unsigned long)sdev->hostdata;
1749 tmf->tgt_scsi_id = rport->port_id;
1750 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1751 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1752 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1753 evt->sync_iu = &rsp_iu;
1754
1755 init_completion(&evt->comp);
1756 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1757 }
1758
1759 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1760
1761 if (rsp_rc != 0) {
1762 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1763 return -EIO;
1764 }
1765
1766 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1767 wait_for_completion(&evt->comp);
1768
1769 if (rsp_iu.cmd.status) {
1770 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1771 rsp_code = fc_rsp->data.info.rsp_code;
1772
1773 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1774 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1775 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1776 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1777 fc_rsp->scsi_status);
1778 rsp_rc = -EIO;
1779 } else
1780 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1781
1782 spin_lock_irqsave(vhost->host->host_lock, flags);
1783 ibmvfc_free_event(evt);
1784 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1785 return rsp_rc;
1786}
1787
1788/**
1789 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1790 * @sdev: scsi device to cancel commands
1791 * @type: type of error recovery being performed
1792 *
1793 * This sends a cancel to the VIOS for the specified device. This does
1794 * NOT send any abort to the actual device. That must be done separately.
1795 *
1796 * Returns:
1797 * 0 on success / other on failure
1798 **/
1799static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1800{
1801 struct ibmvfc_host *vhost = shost_priv(sdev->host);
Brian Kingad8dcff2008-10-29 08:46:41 -05001802 struct scsi_target *starget = scsi_target(sdev);
1803 struct fc_rport *rport = starget_to_rport(starget);
Brian King072b91f2008-07-01 13:14:30 -05001804 struct ibmvfc_tmf *tmf;
1805 struct ibmvfc_event *evt, *found_evt;
1806 union ibmvfc_iu rsp;
1807 int rsp_rc = -EBUSY;
1808 unsigned long flags;
1809 u16 status;
1810
1811 ENTER;
1812 spin_lock_irqsave(vhost->host->host_lock, flags);
1813 found_evt = NULL;
1814 list_for_each_entry(evt, &vhost->sent, queue) {
1815 if (evt->cmnd && evt->cmnd->device == sdev) {
1816 found_evt = evt;
1817 break;
1818 }
1819 }
1820
1821 if (!found_evt) {
1822 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1823 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1824 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1825 return 0;
1826 }
1827
1828 if (vhost->state == IBMVFC_ACTIVE) {
1829 evt = ibmvfc_get_event(vhost);
1830 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1831
1832 tmf = &evt->iu.tmf;
1833 memset(tmf, 0, sizeof(*tmf));
1834 tmf->common.version = 1;
1835 tmf->common.opcode = IBMVFC_TMF_MAD;
1836 tmf->common.length = sizeof(*tmf);
1837 tmf->scsi_id = rport->port_id;
1838 int_to_scsilun(sdev->lun, &tmf->lun);
1839 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1840 tmf->cancel_key = (unsigned long)sdev->hostdata;
Brian Kingad8dcff2008-10-29 08:46:41 -05001841 tmf->my_cancel_key = (unsigned long)starget->hostdata;
Brian King072b91f2008-07-01 13:14:30 -05001842
1843 evt->sync_iu = &rsp;
1844 init_completion(&evt->comp);
1845 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1846 }
1847
1848 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1849
1850 if (rsp_rc != 0) {
1851 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1852 return -EIO;
1853 }
1854
1855 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1856
1857 wait_for_completion(&evt->comp);
1858 status = rsp.mad_common.status;
1859 spin_lock_irqsave(vhost->host->host_lock, flags);
1860 ibmvfc_free_event(evt);
1861 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1862
1863 if (status != IBMVFC_MAD_SUCCESS) {
1864 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1865 return -EIO;
1866 }
1867
1868 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1869 return 0;
1870}
1871
1872/**
Brian Kingad8dcff2008-10-29 08:46:41 -05001873 * ibmvfc_match_target - Match function for specified target
1874 * @evt: ibmvfc event struct
1875 * @device: device to match (starget)
1876 *
1877 * Returns:
1878 * 1 if event matches starget / 0 if event does not match starget
1879 **/
1880static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
1881{
1882 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
1883 return 1;
1884 return 0;
1885}
1886
1887/**
1888 * ibmvfc_match_lun - Match function for specified LUN
1889 * @evt: ibmvfc event struct
1890 * @device: device to match (sdev)
1891 *
1892 * Returns:
1893 * 1 if event matches sdev / 0 if event does not match sdev
1894 **/
1895static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
1896{
1897 if (evt->cmnd && evt->cmnd->device == device)
1898 return 1;
1899 return 0;
1900}
1901
1902/**
1903 * ibmvfc_wait_for_ops - Wait for ops to complete
1904 * @vhost: ibmvfc host struct
1905 * @device: device to match (starget or sdev)
1906 * @match: match function
1907 *
1908 * Returns:
1909 * SUCCESS / FAILED
1910 **/
1911static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
1912 int (*match) (struct ibmvfc_event *, void *))
1913{
1914 struct ibmvfc_event *evt;
1915 DECLARE_COMPLETION_ONSTACK(comp);
1916 int wait;
1917 unsigned long flags;
1918 signed long timeout = init_timeout * HZ;
1919
1920 ENTER;
1921 do {
1922 wait = 0;
1923 spin_lock_irqsave(vhost->host->host_lock, flags);
1924 list_for_each_entry(evt, &vhost->sent, queue) {
1925 if (match(evt, device)) {
1926 evt->eh_comp = &comp;
1927 wait++;
1928 }
1929 }
1930 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1931
1932 if (wait) {
1933 timeout = wait_for_completion_timeout(&comp, timeout);
1934
1935 if (!timeout) {
1936 wait = 0;
1937 spin_lock_irqsave(vhost->host->host_lock, flags);
1938 list_for_each_entry(evt, &vhost->sent, queue) {
1939 if (match(evt, device)) {
1940 evt->eh_comp = NULL;
1941 wait++;
1942 }
1943 }
1944 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1945 if (wait)
1946 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
1947 LEAVE;
1948 return wait ? FAILED : SUCCESS;
1949 }
1950 }
1951 } while (wait);
1952
1953 LEAVE;
1954 return SUCCESS;
1955}
1956
1957/**
Brian King072b91f2008-07-01 13:14:30 -05001958 * ibmvfc_eh_abort_handler - Abort a command
1959 * @cmd: scsi command to abort
1960 *
1961 * Returns:
1962 * SUCCESS / FAILED
1963 **/
1964static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
1965{
Brian Kingad8dcff2008-10-29 08:46:41 -05001966 struct scsi_device *sdev = cmd->device;
1967 struct ibmvfc_host *vhost = shost_priv(sdev->host);
Brian King072b91f2008-07-01 13:14:30 -05001968 int cancel_rc, abort_rc;
Brian Kingad8dcff2008-10-29 08:46:41 -05001969 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05001970
1971 ENTER;
1972 ibmvfc_wait_while_resetting(vhost);
Brian Kingad8dcff2008-10-29 08:46:41 -05001973 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
1974 abort_rc = ibmvfc_abort_task_set(sdev);
Brian King072b91f2008-07-01 13:14:30 -05001975
Brian Kingad8dcff2008-10-29 08:46:41 -05001976 if (!cancel_rc && !abort_rc)
1977 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
Brian King072b91f2008-07-01 13:14:30 -05001978
1979 LEAVE;
Brian Kingad8dcff2008-10-29 08:46:41 -05001980 return rc;
Brian King072b91f2008-07-01 13:14:30 -05001981}
1982
1983/**
1984 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1985 * @cmd: scsi command struct
1986 *
1987 * Returns:
1988 * SUCCESS / FAILED
1989 **/
1990static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
1991{
Brian Kingad8dcff2008-10-29 08:46:41 -05001992 struct scsi_device *sdev = cmd->device;
1993 struct ibmvfc_host *vhost = shost_priv(sdev->host);
Brian King072b91f2008-07-01 13:14:30 -05001994 int cancel_rc, reset_rc;
Brian Kingad8dcff2008-10-29 08:46:41 -05001995 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05001996
1997 ENTER;
1998 ibmvfc_wait_while_resetting(vhost);
Brian Kingad8dcff2008-10-29 08:46:41 -05001999 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2000 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
Brian King072b91f2008-07-01 13:14:30 -05002001
Brian Kingad8dcff2008-10-29 08:46:41 -05002002 if (!cancel_rc && !reset_rc)
2003 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
Brian King072b91f2008-07-01 13:14:30 -05002004
2005 LEAVE;
Brian Kingad8dcff2008-10-29 08:46:41 -05002006 return rc;
Brian King072b91f2008-07-01 13:14:30 -05002007}
2008
2009/**
2010 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2011 * @sdev: scsi device struct
2012 * @data: return code
2013 *
2014 **/
2015static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
2016{
2017 unsigned long *rc = data;
2018 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2019}
2020
2021/**
2022 * ibmvfc_dev_abort_all - Device iterated abort task set function
2023 * @sdev: scsi device struct
2024 * @data: return code
2025 *
2026 **/
2027static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2028{
2029 unsigned long *rc = data;
2030 *rc |= ibmvfc_abort_task_set(sdev);
2031}
2032
2033/**
2034 * ibmvfc_eh_target_reset_handler - Reset the target
2035 * @cmd: scsi command struct
2036 *
2037 * Returns:
2038 * SUCCESS / FAILED
2039 **/
2040static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2041{
Brian Kingad8dcff2008-10-29 08:46:41 -05002042 struct scsi_device *sdev = cmd->device;
2043 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2044 struct scsi_target *starget = scsi_target(sdev);
Brian King072b91f2008-07-01 13:14:30 -05002045 int reset_rc;
Brian Kingad8dcff2008-10-29 08:46:41 -05002046 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05002047 unsigned long cancel_rc = 0;
Brian King072b91f2008-07-01 13:14:30 -05002048
2049 ENTER;
2050 ibmvfc_wait_while_resetting(vhost);
2051 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
Brian Kingad8dcff2008-10-29 08:46:41 -05002052 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
Brian King072b91f2008-07-01 13:14:30 -05002053
Brian Kingad8dcff2008-10-29 08:46:41 -05002054 if (!cancel_rc && !reset_rc)
2055 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
Brian King072b91f2008-07-01 13:14:30 -05002056
2057 LEAVE;
Brian Kingad8dcff2008-10-29 08:46:41 -05002058 return rc;
Brian King072b91f2008-07-01 13:14:30 -05002059}
2060
2061/**
2062 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2063 * @cmd: struct scsi_cmnd having problems
2064 *
2065 **/
2066static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2067{
2068 int rc;
2069 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2070
2071 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2072 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2073 return rc ? FAILED : SUCCESS;
2074}
2075
2076/**
2077 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2078 * @rport: rport struct
2079 *
2080 * Return value:
2081 * none
2082 **/
2083static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2084{
2085 struct scsi_target *starget = to_scsi_target(&rport->dev);
2086 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2087 struct ibmvfc_host *vhost = shost_priv(shost);
Brian King072b91f2008-07-01 13:14:30 -05002088 unsigned long cancel_rc = 0;
2089 unsigned long abort_rc = 0;
Brian Kingad8dcff2008-10-29 08:46:41 -05002090 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05002091
2092 ENTER;
2093 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2094 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2095
Brian Kingad8dcff2008-10-29 08:46:41 -05002096 if (!cancel_rc && !abort_rc)
2097 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2098
2099 if (rc == FAILED)
Brian King072b91f2008-07-01 13:14:30 -05002100 ibmvfc_issue_fc_host_lip(shost);
Brian King072b91f2008-07-01 13:14:30 -05002101 LEAVE;
2102}
2103
2104static const struct {
2105 enum ibmvfc_async_event ae;
2106 const char *desc;
2107} ae_desc [] = {
2108 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2109 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2110 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2111 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2112 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2113 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2114 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2115 { IBMVFC_AE_LINK_UP, "Link Up" },
2116 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2117 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2118 { IBMVFC_AE_HALT, "Halt" },
2119 { IBMVFC_AE_RESUME, "Resume" },
2120 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2121};
2122
2123static const char *unknown_ae = "Unknown async";
2124
2125/**
2126 * ibmvfc_get_ae_desc - Get text description for async event
2127 * @ae: async event
2128 *
2129 **/
2130static const char *ibmvfc_get_ae_desc(u64 ae)
2131{
2132 int i;
2133
2134 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2135 if (ae_desc[i].ae == ae)
2136 return ae_desc[i].desc;
2137
2138 return unknown_ae;
2139}
2140
2141/**
2142 * ibmvfc_handle_async - Handle an async event from the adapter
2143 * @crq: crq to process
2144 * @vhost: ibmvfc host struct
2145 *
2146 **/
2147static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2148 struct ibmvfc_host *vhost)
2149{
2150 const char *desc = ibmvfc_get_ae_desc(crq->event);
2151
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002152 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2153 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
Brian King072b91f2008-07-01 13:14:30 -05002154
2155 switch (crq->event) {
2156 case IBMVFC_AE_LINK_UP:
2157 case IBMVFC_AE_RESUME:
2158 vhost->events_to_log |= IBMVFC_AE_LINKUP;
Brian Kingd2131b32008-12-18 09:26:51 -06002159 vhost->delay_init = 1;
2160 __ibmvfc_reset_host(vhost);
Brian King072b91f2008-07-01 13:14:30 -05002161 break;
2162 case IBMVFC_AE_SCN_FABRIC:
Brian Kingd2131b32008-12-18 09:26:51 -06002163 case IBMVFC_AE_SCN_DOMAIN:
Brian King072b91f2008-07-01 13:14:30 -05002164 vhost->events_to_log |= IBMVFC_AE_RSCN;
Brian Kingd2131b32008-12-18 09:26:51 -06002165 vhost->delay_init = 1;
2166 __ibmvfc_reset_host(vhost);
Brian King072b91f2008-07-01 13:14:30 -05002167 break;
2168 case IBMVFC_AE_SCN_NPORT:
2169 case IBMVFC_AE_SCN_GROUP:
Brian King072b91f2008-07-01 13:14:30 -05002170 vhost->events_to_log |= IBMVFC_AE_RSCN;
2171 case IBMVFC_AE_ELS_LOGO:
2172 case IBMVFC_AE_ELS_PRLO:
2173 case IBMVFC_AE_ELS_PLOGI:
2174 ibmvfc_reinit_host(vhost);
2175 break;
2176 case IBMVFC_AE_LINK_DOWN:
2177 case IBMVFC_AE_ADAPTER_FAILED:
2178 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2179 break;
2180 case IBMVFC_AE_LINK_DEAD:
2181 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2182 break;
2183 case IBMVFC_AE_HALT:
2184 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2185 break;
2186 default:
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002187 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
Brian King072b91f2008-07-01 13:14:30 -05002188 break;
2189 };
2190}
2191
2192/**
2193 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2194 * @crq: Command/Response queue
2195 * @vhost: ibmvfc host struct
2196 *
2197 **/
2198static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2199{
2200 long rc;
2201 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2202
2203 switch (crq->valid) {
2204 case IBMVFC_CRQ_INIT_RSP:
2205 switch (crq->format) {
2206 case IBMVFC_CRQ_INIT:
2207 dev_info(vhost->dev, "Partner initialized\n");
2208 /* Send back a response */
2209 rc = ibmvfc_send_crq_init_complete(vhost);
2210 if (rc == 0)
Brian Kingcf6f10d2008-08-15 10:59:23 -05002211 ibmvfc_init_host(vhost, 0);
Brian King072b91f2008-07-01 13:14:30 -05002212 else
2213 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2214 break;
2215 case IBMVFC_CRQ_INIT_COMPLETE:
2216 dev_info(vhost->dev, "Partner initialization complete\n");
Brian Kingcf6f10d2008-08-15 10:59:23 -05002217 ibmvfc_init_host(vhost, 0);
Brian King072b91f2008-07-01 13:14:30 -05002218 break;
2219 default:
2220 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2221 }
2222 return;
2223 case IBMVFC_CRQ_XPORT_EVENT:
2224 vhost->state = IBMVFC_NO_CRQ;
2225 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2226 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2227 /* We need to re-setup the interpartition connection */
2228 dev_info(vhost->dev, "Re-enabling adapter\n");
2229 vhost->client_migrated = 1;
2230 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2231 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2232 (rc = ibmvfc_send_crq_init(vhost))) {
2233 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2234 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2235 } else
2236 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2237 } else {
2238 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2239
2240 ibmvfc_purge_requests(vhost, DID_ERROR);
2241 if ((rc = ibmvfc_reset_crq(vhost)) ||
2242 (rc = ibmvfc_send_crq_init(vhost))) {
2243 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2244 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2245 } else
2246 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2247 }
2248 return;
2249 case IBMVFC_CRQ_CMD_RSP:
2250 break;
2251 default:
2252 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2253 return;
2254 }
2255
2256 if (crq->format == IBMVFC_ASYNC_EVENT)
2257 return;
2258
2259 /* The only kind of payload CRQs we should get are responses to
2260 * things we send. Make sure this response is to something we
2261 * actually sent
2262 */
2263 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002264 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
Brian King072b91f2008-07-01 13:14:30 -05002265 crq->ioba);
2266 return;
2267 }
2268
2269 if (unlikely(atomic_read(&evt->free))) {
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002270 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
Brian King072b91f2008-07-01 13:14:30 -05002271 crq->ioba);
2272 return;
2273 }
2274
2275 del_timer(&evt->timer);
2276 list_del(&evt->queue);
2277 ibmvfc_trc_end(evt);
2278 evt->done(evt);
2279}
2280
2281/**
2282 * ibmvfc_scan_finished - Check if the device scan is done.
2283 * @shost: scsi host struct
2284 * @time: current elapsed time
2285 *
2286 * Returns:
2287 * 0 if scan is not done / 1 if scan is done
2288 **/
2289static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2290{
2291 unsigned long flags;
2292 struct ibmvfc_host *vhost = shost_priv(shost);
2293 int done = 0;
2294
2295 spin_lock_irqsave(shost->host_lock, flags);
2296 if (time >= (init_timeout * HZ)) {
2297 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2298 "continuing initialization\n", init_timeout);
2299 done = 1;
2300 }
2301
2302 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE)
2303 done = 1;
2304 spin_unlock_irqrestore(shost->host_lock, flags);
2305 return done;
2306}
2307
2308/**
2309 * ibmvfc_slave_alloc - Setup the device's task set value
2310 * @sdev: struct scsi_device device to configure
2311 *
2312 * Set the device's task set value so that error handling works as
2313 * expected.
2314 *
2315 * Returns:
2316 * 0 on success / -ENXIO if device does not exist
2317 **/
2318static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2319{
2320 struct Scsi_Host *shost = sdev->host;
2321 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2322 struct ibmvfc_host *vhost = shost_priv(shost);
2323 unsigned long flags = 0;
2324
2325 if (!rport || fc_remote_port_chkready(rport))
2326 return -ENXIO;
2327
2328 spin_lock_irqsave(shost->host_lock, flags);
2329 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2330 spin_unlock_irqrestore(shost->host_lock, flags);
2331 return 0;
2332}
2333
2334/**
Brian Kingad8dcff2008-10-29 08:46:41 -05002335 * ibmvfc_target_alloc - Setup the target's task set value
2336 * @starget: struct scsi_target
2337 *
2338 * Set the target's task set value so that error handling works as
2339 * expected.
2340 *
2341 * Returns:
2342 * 0 on success / -ENXIO if device does not exist
2343 **/
2344static int ibmvfc_target_alloc(struct scsi_target *starget)
2345{
2346 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2347 struct ibmvfc_host *vhost = shost_priv(shost);
2348 unsigned long flags = 0;
2349
2350 spin_lock_irqsave(shost->host_lock, flags);
2351 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2352 spin_unlock_irqrestore(shost->host_lock, flags);
2353 return 0;
2354}
2355
2356/**
Brian King072b91f2008-07-01 13:14:30 -05002357 * ibmvfc_slave_configure - Configure the device
2358 * @sdev: struct scsi_device device to configure
2359 *
2360 * Enable allow_restart for a device if it is a disk. Adjust the
2361 * queue_depth here also.
2362 *
2363 * Returns:
2364 * 0
2365 **/
2366static int ibmvfc_slave_configure(struct scsi_device *sdev)
2367{
2368 struct Scsi_Host *shost = sdev->host;
2369 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2370 unsigned long flags = 0;
2371
2372 spin_lock_irqsave(shost->host_lock, flags);
2373 if (sdev->type == TYPE_DISK)
2374 sdev->allow_restart = 1;
2375
2376 if (sdev->tagged_supported) {
2377 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2378 scsi_activate_tcq(sdev, sdev->queue_depth);
2379 } else
2380 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2381
2382 rport->dev_loss_tmo = dev_loss_tmo;
2383 spin_unlock_irqrestore(shost->host_lock, flags);
2384 return 0;
2385}
2386
2387/**
2388 * ibmvfc_change_queue_depth - Change the device's queue depth
2389 * @sdev: scsi device struct
2390 * @qdepth: depth to set
2391 *
2392 * Return value:
2393 * actual depth set
2394 **/
2395static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2396{
2397 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2398 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2399
2400 scsi_adjust_queue_depth(sdev, 0, qdepth);
2401 return sdev->queue_depth;
2402}
2403
2404/**
2405 * ibmvfc_change_queue_type - Change the device's queue type
2406 * @sdev: scsi device struct
2407 * @tag_type: type of tags to use
2408 *
2409 * Return value:
2410 * actual queue type set
2411 **/
2412static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2413{
2414 if (sdev->tagged_supported) {
2415 scsi_set_tag_type(sdev, tag_type);
2416
2417 if (tag_type)
2418 scsi_activate_tcq(sdev, sdev->queue_depth);
2419 else
2420 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2421 } else
2422 tag_type = 0;
2423
2424 return tag_type;
2425}
2426
2427static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2428 struct device_attribute *attr, char *buf)
2429{
2430 struct Scsi_Host *shost = class_to_shost(dev);
2431 struct ibmvfc_host *vhost = shost_priv(shost);
2432
2433 return snprintf(buf, PAGE_SIZE, "%s\n",
2434 vhost->login_buf->resp.partition_name);
2435}
2436
2437static struct device_attribute ibmvfc_host_partition_name = {
2438 .attr = {
2439 .name = "partition_name",
2440 .mode = S_IRUGO,
2441 },
2442 .show = ibmvfc_show_host_partition_name,
2443};
2444
2445static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2446 struct device_attribute *attr, char *buf)
2447{
2448 struct Scsi_Host *shost = class_to_shost(dev);
2449 struct ibmvfc_host *vhost = shost_priv(shost);
2450
2451 return snprintf(buf, PAGE_SIZE, "%s\n",
2452 vhost->login_buf->resp.device_name);
2453}
2454
2455static struct device_attribute ibmvfc_host_device_name = {
2456 .attr = {
2457 .name = "device_name",
2458 .mode = S_IRUGO,
2459 },
2460 .show = ibmvfc_show_host_device_name,
2461};
2462
2463static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2464 struct device_attribute *attr, char *buf)
2465{
2466 struct Scsi_Host *shost = class_to_shost(dev);
2467 struct ibmvfc_host *vhost = shost_priv(shost);
2468
2469 return snprintf(buf, PAGE_SIZE, "%s\n",
2470 vhost->login_buf->resp.port_loc_code);
2471}
2472
2473static struct device_attribute ibmvfc_host_loc_code = {
2474 .attr = {
2475 .name = "port_loc_code",
2476 .mode = S_IRUGO,
2477 },
2478 .show = ibmvfc_show_host_loc_code,
2479};
2480
2481static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2482 struct device_attribute *attr, char *buf)
2483{
2484 struct Scsi_Host *shost = class_to_shost(dev);
2485 struct ibmvfc_host *vhost = shost_priv(shost);
2486
2487 return snprintf(buf, PAGE_SIZE, "%s\n",
2488 vhost->login_buf->resp.drc_name);
2489}
2490
2491static struct device_attribute ibmvfc_host_drc_name = {
2492 .attr = {
2493 .name = "drc_name",
2494 .mode = S_IRUGO,
2495 },
2496 .show = ibmvfc_show_host_drc_name,
2497};
2498
2499static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2500 struct device_attribute *attr, char *buf)
2501{
2502 struct Scsi_Host *shost = class_to_shost(dev);
2503 struct ibmvfc_host *vhost = shost_priv(shost);
2504 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2505}
2506
2507static struct device_attribute ibmvfc_host_npiv_version = {
2508 .attr = {
2509 .name = "npiv_version",
2510 .mode = S_IRUGO,
2511 },
2512 .show = ibmvfc_show_host_npiv_version,
2513};
2514
2515/**
2516 * ibmvfc_show_log_level - Show the adapter's error logging level
2517 * @dev: class device struct
2518 * @buf: buffer
2519 *
2520 * Return value:
2521 * number of bytes printed to buffer
2522 **/
2523static ssize_t ibmvfc_show_log_level(struct device *dev,
2524 struct device_attribute *attr, char *buf)
2525{
2526 struct Scsi_Host *shost = class_to_shost(dev);
2527 struct ibmvfc_host *vhost = shost_priv(shost);
2528 unsigned long flags = 0;
2529 int len;
2530
2531 spin_lock_irqsave(shost->host_lock, flags);
2532 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2533 spin_unlock_irqrestore(shost->host_lock, flags);
2534 return len;
2535}
2536
2537/**
2538 * ibmvfc_store_log_level - Change the adapter's error logging level
2539 * @dev: class device struct
2540 * @buf: buffer
2541 *
2542 * Return value:
2543 * number of bytes printed to buffer
2544 **/
2545static ssize_t ibmvfc_store_log_level(struct device *dev,
2546 struct device_attribute *attr,
2547 const char *buf, size_t count)
2548{
2549 struct Scsi_Host *shost = class_to_shost(dev);
2550 struct ibmvfc_host *vhost = shost_priv(shost);
2551 unsigned long flags = 0;
2552
2553 spin_lock_irqsave(shost->host_lock, flags);
2554 vhost->log_level = simple_strtoul(buf, NULL, 10);
2555 spin_unlock_irqrestore(shost->host_lock, flags);
2556 return strlen(buf);
2557}
2558
2559static struct device_attribute ibmvfc_log_level_attr = {
2560 .attr = {
2561 .name = "log_level",
2562 .mode = S_IRUGO | S_IWUSR,
2563 },
2564 .show = ibmvfc_show_log_level,
2565 .store = ibmvfc_store_log_level
2566};
2567
2568#ifdef CONFIG_SCSI_IBMVFC_TRACE
2569/**
2570 * ibmvfc_read_trace - Dump the adapter trace
2571 * @kobj: kobject struct
2572 * @bin_attr: bin_attribute struct
2573 * @buf: buffer
2574 * @off: offset
2575 * @count: buffer size
2576 *
2577 * Return value:
2578 * number of bytes printed to buffer
2579 **/
2580static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2581 struct bin_attribute *bin_attr,
2582 char *buf, loff_t off, size_t count)
2583{
2584 struct device *dev = container_of(kobj, struct device, kobj);
2585 struct Scsi_Host *shost = class_to_shost(dev);
2586 struct ibmvfc_host *vhost = shost_priv(shost);
2587 unsigned long flags = 0;
2588 int size = IBMVFC_TRACE_SIZE;
2589 char *src = (char *)vhost->trace;
2590
2591 if (off > size)
2592 return 0;
2593 if (off + count > size) {
2594 size -= off;
2595 count = size;
2596 }
2597
2598 spin_lock_irqsave(shost->host_lock, flags);
2599 memcpy(buf, &src[off], count);
2600 spin_unlock_irqrestore(shost->host_lock, flags);
2601 return count;
2602}
2603
2604static struct bin_attribute ibmvfc_trace_attr = {
2605 .attr = {
2606 .name = "trace",
2607 .mode = S_IRUGO,
2608 },
2609 .size = 0,
2610 .read = ibmvfc_read_trace,
2611};
2612#endif
2613
2614static struct device_attribute *ibmvfc_attrs[] = {
2615 &ibmvfc_host_partition_name,
2616 &ibmvfc_host_device_name,
2617 &ibmvfc_host_loc_code,
2618 &ibmvfc_host_drc_name,
2619 &ibmvfc_host_npiv_version,
2620 &ibmvfc_log_level_attr,
2621 NULL
2622};
2623
2624static struct scsi_host_template driver_template = {
2625 .module = THIS_MODULE,
2626 .name = "IBM POWER Virtual FC Adapter",
2627 .proc_name = IBMVFC_NAME,
2628 .queuecommand = ibmvfc_queuecommand,
2629 .eh_abort_handler = ibmvfc_eh_abort_handler,
2630 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2631 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2632 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2633 .slave_alloc = ibmvfc_slave_alloc,
2634 .slave_configure = ibmvfc_slave_configure,
Brian Kingad8dcff2008-10-29 08:46:41 -05002635 .target_alloc = ibmvfc_target_alloc,
Brian King072b91f2008-07-01 13:14:30 -05002636 .scan_finished = ibmvfc_scan_finished,
2637 .change_queue_depth = ibmvfc_change_queue_depth,
2638 .change_queue_type = ibmvfc_change_queue_type,
2639 .cmd_per_lun = 16,
2640 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2641 .this_id = -1,
2642 .sg_tablesize = SG_ALL,
2643 .max_sectors = IBMVFC_MAX_SECTORS,
2644 .use_clustering = ENABLE_CLUSTERING,
2645 .shost_attrs = ibmvfc_attrs,
2646};
2647
2648/**
2649 * ibmvfc_next_async_crq - Returns the next entry in async queue
2650 * @vhost: ibmvfc host struct
2651 *
2652 * Returns:
2653 * Pointer to next entry in queue / NULL if empty
2654 **/
2655static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2656{
2657 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2658 struct ibmvfc_async_crq *crq;
2659
2660 crq = &async_crq->msgs[async_crq->cur];
2661 if (crq->valid & 0x80) {
2662 if (++async_crq->cur == async_crq->size)
2663 async_crq->cur = 0;
2664 } else
2665 crq = NULL;
2666
2667 return crq;
2668}
2669
2670/**
2671 * ibmvfc_next_crq - Returns the next entry in message queue
2672 * @vhost: ibmvfc host struct
2673 *
2674 * Returns:
2675 * Pointer to next entry in queue / NULL if empty
2676 **/
2677static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2678{
2679 struct ibmvfc_crq_queue *queue = &vhost->crq;
2680 struct ibmvfc_crq *crq;
2681
2682 crq = &queue->msgs[queue->cur];
2683 if (crq->valid & 0x80) {
2684 if (++queue->cur == queue->size)
2685 queue->cur = 0;
2686 } else
2687 crq = NULL;
2688
2689 return crq;
2690}
2691
2692/**
2693 * ibmvfc_interrupt - Interrupt handler
2694 * @irq: number of irq to handle, not used
2695 * @dev_instance: ibmvfc_host that received interrupt
2696 *
2697 * Returns:
2698 * IRQ_HANDLED
2699 **/
2700static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2701{
2702 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
Brian King039a0892009-03-20 15:44:35 -05002703 unsigned long flags;
2704
2705 spin_lock_irqsave(vhost->host->host_lock, flags);
2706 vio_disable_interrupts(to_vio_dev(vhost->dev));
2707 tasklet_schedule(&vhost->tasklet);
2708 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2709 return IRQ_HANDLED;
2710}
2711
2712/**
2713 * ibmvfc_tasklet - Interrupt handler tasklet
2714 * @data: ibmvfc host struct
2715 *
2716 * Returns:
2717 * Nothing
2718 **/
2719static void ibmvfc_tasklet(void *data)
2720{
2721 struct ibmvfc_host *vhost = data;
Brian King072b91f2008-07-01 13:14:30 -05002722 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2723 struct ibmvfc_crq *crq;
2724 struct ibmvfc_async_crq *async;
2725 unsigned long flags;
2726 int done = 0;
2727
2728 spin_lock_irqsave(vhost->host->host_lock, flags);
Brian King072b91f2008-07-01 13:14:30 -05002729 while (!done) {
2730 /* Pull all the valid messages off the CRQ */
2731 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2732 ibmvfc_handle_crq(crq, vhost);
2733 crq->valid = 0;
2734 }
2735
2736 /* Pull all the valid messages off the async CRQ */
2737 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2738 ibmvfc_handle_async(async, vhost);
2739 async->valid = 0;
2740 }
2741
2742 vio_enable_interrupts(vdev);
2743 if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2744 vio_disable_interrupts(vdev);
2745 ibmvfc_handle_crq(crq, vhost);
2746 crq->valid = 0;
2747 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2748 vio_disable_interrupts(vdev);
2749 ibmvfc_handle_async(async, vhost);
Brian King4081b772008-11-14 13:33:50 -06002750 async->valid = 0;
Brian King072b91f2008-07-01 13:14:30 -05002751 } else
2752 done = 1;
2753 }
2754
2755 spin_unlock_irqrestore(vhost->host->host_lock, flags);
Brian King072b91f2008-07-01 13:14:30 -05002756}
2757
2758/**
2759 * ibmvfc_init_tgt - Set the next init job step for the target
2760 * @tgt: ibmvfc target struct
2761 * @job_step: job step to perform
2762 *
2763 **/
2764static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2765 void (*job_step) (struct ibmvfc_target *))
2766{
2767 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2768 tgt->job_step = job_step;
2769 wake_up(&tgt->vhost->work_wait_q);
2770}
2771
2772/**
2773 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2774 * @tgt: ibmvfc target struct
2775 * @job_step: initialization job step
2776 *
2777 **/
2778static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
2779 void (*job_step) (struct ibmvfc_target *))
2780{
Brian King1c41fa822008-12-03 11:02:54 -06002781 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
Brian King072b91f2008-07-01 13:14:30 -05002782 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2783 wake_up(&tgt->vhost->work_wait_q);
2784 } else
2785 ibmvfc_init_tgt(tgt, job_step);
2786}
2787
Brian Kinga3b7aea2009-02-02 18:39:40 -06002788/* Defined in FC-LS */
2789static const struct {
2790 int code;
2791 int retry;
2792 int logged_in;
2793} prli_rsp [] = {
2794 { 0, 1, 0 },
2795 { 1, 0, 1 },
2796 { 2, 1, 0 },
2797 { 3, 1, 0 },
2798 { 4, 0, 0 },
2799 { 5, 0, 0 },
2800 { 6, 0, 1 },
2801 { 7, 0, 0 },
2802 { 8, 1, 0 },
2803};
2804
2805/**
2806 * ibmvfc_get_prli_rsp - Find PRLI response index
2807 * @flags: PRLI response flags
2808 *
2809 **/
2810static int ibmvfc_get_prli_rsp(u16 flags)
2811{
2812 int i;
2813 int code = (flags & 0x0f00) >> 8;
2814
2815 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
2816 if (prli_rsp[i].code == code)
2817 return i;
2818
2819 return 0;
2820}
2821
Brian King072b91f2008-07-01 13:14:30 -05002822/**
Brian King072b91f2008-07-01 13:14:30 -05002823 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2824 * @evt: ibmvfc event struct
2825 *
2826 **/
2827static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2828{
2829 struct ibmvfc_target *tgt = evt->tgt;
2830 struct ibmvfc_host *vhost = evt->vhost;
2831 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
Brian Kinga3b7aea2009-02-02 18:39:40 -06002832 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
Brian King072b91f2008-07-01 13:14:30 -05002833 u32 status = rsp->common.status;
Brian Kinga3b7aea2009-02-02 18:39:40 -06002834 int index;
Brian King072b91f2008-07-01 13:14:30 -05002835
2836 vhost->discovery_threads--;
2837 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2838 switch (status) {
2839 case IBMVFC_MAD_SUCCESS:
Brian Kinga3b7aea2009-02-02 18:39:40 -06002840 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
2841 parms->type, parms->flags, parms->service_parms);
2842
2843 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
2844 index = ibmvfc_get_prli_rsp(parms->flags);
2845 if (prli_rsp[index].logged_in) {
2846 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
2847 tgt->need_login = 0;
2848 tgt->ids.roles = 0;
2849 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
2850 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
2851 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
2852 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
2853 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT);
2854 } else
2855 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2856 } else if (prli_rsp[index].retry)
2857 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2858 else
2859 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2860 } else
2861 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King072b91f2008-07-01 13:14:30 -05002862 break;
2863 case IBMVFC_MAD_DRIVER_FAILED:
2864 break;
2865 case IBMVFC_MAD_CRQ_ERROR:
2866 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2867 break;
2868 case IBMVFC_MAD_FAILED:
2869 default:
2870 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2871 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2872 rsp->status, rsp->error, status);
2873 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2874 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
Brian King10e79492008-10-29 08:46:45 -05002875 else
2876 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King072b91f2008-07-01 13:14:30 -05002877 break;
2878 };
2879
2880 kref_put(&tgt->kref, ibmvfc_release_tgt);
2881 ibmvfc_free_event(evt);
2882 wake_up(&vhost->work_wait_q);
2883}
2884
2885/**
2886 * ibmvfc_tgt_send_prli - Send a process login
2887 * @tgt: ibmvfc target struct
2888 *
2889 **/
2890static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2891{
2892 struct ibmvfc_process_login *prli;
2893 struct ibmvfc_host *vhost = tgt->vhost;
2894 struct ibmvfc_event *evt;
2895
2896 if (vhost->discovery_threads >= disc_threads)
2897 return;
2898
2899 kref_get(&tgt->kref);
2900 evt = ibmvfc_get_event(vhost);
2901 vhost->discovery_threads++;
2902 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2903 evt->tgt = tgt;
2904 prli = &evt->iu.prli;
2905 memset(prli, 0, sizeof(*prli));
2906 prli->common.version = 1;
2907 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2908 prli->common.length = sizeof(*prli);
2909 prli->scsi_id = tgt->scsi_id;
2910
2911 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2912 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2913 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2914
2915 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2916 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2917 vhost->discovery_threads--;
2918 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2919 kref_put(&tgt->kref, ibmvfc_release_tgt);
2920 } else
2921 tgt_dbg(tgt, "Sent process login\n");
2922}
2923
2924/**
2925 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2926 * @evt: ibmvfc event struct
2927 *
2928 **/
2929static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
2930{
2931 struct ibmvfc_target *tgt = evt->tgt;
2932 struct ibmvfc_host *vhost = evt->vhost;
2933 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
2934 u32 status = rsp->common.status;
2935
2936 vhost->discovery_threads--;
2937 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2938 switch (status) {
2939 case IBMVFC_MAD_SUCCESS:
2940 tgt_dbg(tgt, "Port Login succeeded\n");
2941 if (tgt->ids.port_name &&
2942 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
2943 vhost->reinit = 1;
2944 tgt_dbg(tgt, "Port re-init required\n");
2945 break;
2946 }
2947 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
2948 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
2949 tgt->ids.port_id = tgt->scsi_id;
Brian King072b91f2008-07-01 13:14:30 -05002950 memcpy(&tgt->service_parms, &rsp->service_parms,
2951 sizeof(tgt->service_parms));
2952 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
2953 sizeof(tgt->service_parms_change));
2954 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
2955 break;
2956 case IBMVFC_MAD_DRIVER_FAILED:
2957 break;
2958 case IBMVFC_MAD_CRQ_ERROR:
2959 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2960 break;
2961 case IBMVFC_MAD_FAILED:
2962 default:
2963 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2964 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
2965 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
2966 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
2967
2968 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2969 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
Brian King10e79492008-10-29 08:46:45 -05002970 else
2971 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King072b91f2008-07-01 13:14:30 -05002972 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_tgt_send_plogi - Send PLOGI to the specified target
2982 * @tgt: ibmvfc target struct
2983 *
2984 **/
2985static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
2986{
2987 struct ibmvfc_port_login *plogi;
2988 struct ibmvfc_host *vhost = tgt->vhost;
2989 struct ibmvfc_event *evt;
2990
2991 if (vhost->discovery_threads >= disc_threads)
2992 return;
2993
2994 kref_get(&tgt->kref);
2995 evt = ibmvfc_get_event(vhost);
2996 vhost->discovery_threads++;
2997 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2998 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
2999 evt->tgt = tgt;
3000 plogi = &evt->iu.plogi;
3001 memset(plogi, 0, sizeof(*plogi));
3002 plogi->common.version = 1;
3003 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3004 plogi->common.length = sizeof(*plogi);
3005 plogi->scsi_id = tgt->scsi_id;
3006
3007 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3008 vhost->discovery_threads--;
3009 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3010 kref_put(&tgt->kref, ibmvfc_release_tgt);
3011 } else
3012 tgt_dbg(tgt, "Sent port login\n");
3013}
3014
3015/**
3016 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3017 * @evt: ibmvfc event struct
3018 *
3019 **/
3020static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3021{
3022 struct ibmvfc_target *tgt = evt->tgt;
3023 struct ibmvfc_host *vhost = evt->vhost;
3024 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3025 u32 status = rsp->common.status;
3026
3027 vhost->discovery_threads--;
3028 ibmvfc_free_event(evt);
3029 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3030
3031 switch (status) {
3032 case IBMVFC_MAD_SUCCESS:
3033 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3034 break;
3035 case IBMVFC_MAD_DRIVER_FAILED:
3036 kref_put(&tgt->kref, ibmvfc_release_tgt);
3037 wake_up(&vhost->work_wait_q);
3038 return;
3039 case IBMVFC_MAD_FAILED:
3040 default:
3041 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3042 break;
3043 };
3044
3045 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3046 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3047 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3048 tgt->scsi_id != tgt->new_scsi_id)
3049 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3050 kref_put(&tgt->kref, ibmvfc_release_tgt);
3051 wake_up(&vhost->work_wait_q);
3052}
3053
3054/**
3055 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3056 * @tgt: ibmvfc target struct
3057 *
3058 **/
3059static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3060{
3061 struct ibmvfc_implicit_logout *mad;
3062 struct ibmvfc_host *vhost = tgt->vhost;
3063 struct ibmvfc_event *evt;
3064
3065 if (vhost->discovery_threads >= disc_threads)
3066 return;
3067
3068 kref_get(&tgt->kref);
3069 evt = ibmvfc_get_event(vhost);
3070 vhost->discovery_threads++;
3071 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3072 evt->tgt = tgt;
3073 mad = &evt->iu.implicit_logout;
3074 memset(mad, 0, sizeof(*mad));
3075 mad->common.version = 1;
3076 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3077 mad->common.length = sizeof(*mad);
3078 mad->old_scsi_id = tgt->scsi_id;
3079
3080 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3081 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3082 vhost->discovery_threads--;
3083 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3084 kref_put(&tgt->kref, ibmvfc_release_tgt);
3085 } else
3086 tgt_dbg(tgt, "Sent Implicit Logout\n");
3087}
3088
3089/**
Brian King989b8542008-07-22 08:31:47 -05003090 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3091 * @mad: ibmvfc passthru mad struct
3092 * @tgt: ibmvfc target struct
3093 *
3094 * Returns:
3095 * 1 if PLOGI needed / 0 if PLOGI not needed
3096 **/
3097static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3098 struct ibmvfc_target *tgt)
3099{
3100 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3101 sizeof(tgt->ids.port_name)))
3102 return 1;
3103 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3104 sizeof(tgt->ids.node_name)))
3105 return 1;
3106 if (mad->fc_iu.response[6] != tgt->scsi_id)
3107 return 1;
3108 return 0;
3109}
3110
3111/**
3112 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3113 * @evt: ibmvfc event struct
3114 *
3115 **/
3116static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3117{
3118 struct ibmvfc_target *tgt = evt->tgt;
3119 struct ibmvfc_host *vhost = evt->vhost;
3120 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3121 u32 status = mad->common.status;
3122 u8 fc_reason, fc_explain;
3123
3124 vhost->discovery_threads--;
3125 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
Brian King10501e12009-03-20 15:44:39 -05003126 del_timer(&tgt->timer);
Brian King989b8542008-07-22 08:31:47 -05003127
3128 switch (status) {
3129 case IBMVFC_MAD_SUCCESS:
3130 tgt_dbg(tgt, "ADISC succeeded\n");
3131 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3132 tgt->need_login = 1;
3133 break;
3134 case IBMVFC_MAD_DRIVER_FAILED:
3135 break;
3136 case IBMVFC_MAD_FAILED:
3137 default:
3138 tgt->need_login = 1;
3139 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3140 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3141 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3142 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3143 mad->iu.status, mad->iu.error,
3144 ibmvfc_get_fc_type(fc_reason), fc_reason,
3145 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3146 break;
3147 };
3148
3149 kref_put(&tgt->kref, ibmvfc_release_tgt);
3150 ibmvfc_free_event(evt);
3151 wake_up(&vhost->work_wait_q);
3152}
3153
3154/**
3155 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3156 * @evt: ibmvfc event struct
3157 *
3158 **/
3159static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3160{
3161 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3162
3163 memset(mad, 0, sizeof(*mad));
3164 mad->common.version = 1;
3165 mad->common.opcode = IBMVFC_PASSTHRU;
3166 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3167 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3168 offsetof(struct ibmvfc_passthru_mad, iu);
3169 mad->cmd_ioba.len = sizeof(mad->iu);
3170 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3171 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3172 mad->iu.cmd.va = (u64)evt->crq.ioba +
3173 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3174 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3175 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3176 mad->iu.rsp.va = (u64)evt->crq.ioba +
3177 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3178 offsetof(struct ibmvfc_passthru_fc_iu, response);
3179 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3180}
3181
3182/**
Brian King10501e12009-03-20 15:44:39 -05003183 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3184 * @evt: ibmvfc event struct
3185 *
3186 * Just cleanup this event struct. Everything else is handled by
3187 * the ADISC completion handler. If the ADISC never actually comes
3188 * back, we still have the timer running on the ADISC event struct
3189 * which will fire and cause the CRQ to get reset.
3190 *
3191 **/
3192static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3193{
3194 struct ibmvfc_host *vhost = evt->vhost;
3195 struct ibmvfc_target *tgt = evt->tgt;
3196
3197 tgt_dbg(tgt, "ADISC cancel complete\n");
3198 vhost->abort_threads--;
3199 ibmvfc_free_event(evt);
3200 kref_put(&tgt->kref, ibmvfc_release_tgt);
3201 wake_up(&vhost->work_wait_q);
3202}
3203
3204/**
3205 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3206 * @tgt: ibmvfc target struct
3207 *
3208 * If an ADISC times out, send a cancel. If the cancel times
3209 * out, reset the CRQ. When the ADISC comes back as cancelled,
3210 * log back into the target.
3211 **/
3212static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3213{
3214 struct ibmvfc_host *vhost = tgt->vhost;
3215 struct ibmvfc_event *evt;
3216 struct ibmvfc_tmf *tmf;
3217 unsigned long flags;
3218 int rc;
3219
3220 tgt_dbg(tgt, "ADISC timeout\n");
3221 spin_lock_irqsave(vhost->host->host_lock, flags);
3222 if (vhost->abort_threads >= disc_threads ||
3223 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3224 vhost->state != IBMVFC_INITIALIZING ||
3225 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3226 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3227 return;
3228 }
3229
3230 vhost->abort_threads++;
3231 kref_get(&tgt->kref);
3232 evt = ibmvfc_get_event(vhost);
3233 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3234
3235 evt->tgt = tgt;
3236 tmf = &evt->iu.tmf;
3237 memset(tmf, 0, sizeof(*tmf));
3238 tmf->common.version = 1;
3239 tmf->common.opcode = IBMVFC_TMF_MAD;
3240 tmf->common.length = sizeof(*tmf);
3241 tmf->scsi_id = tgt->scsi_id;
3242 tmf->cancel_key = tgt->cancel_key;
3243
3244 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3245
3246 if (rc) {
3247 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3248 vhost->abort_threads--;
3249 kref_put(&tgt->kref, ibmvfc_release_tgt);
3250 __ibmvfc_reset_host(vhost);
3251 } else
3252 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3253 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3254}
3255
3256/**
Brian King989b8542008-07-22 08:31:47 -05003257 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3258 * @tgt: ibmvfc target struct
3259 *
Brian King10501e12009-03-20 15:44:39 -05003260 * When sending an ADISC we end up with two timers running. The
3261 * first timer is the timer in the ibmvfc target struct. If this
3262 * fires, we send a cancel to the target. The second timer is the
3263 * timer on the ibmvfc event for the ADISC, which is longer. If that
3264 * fires, it means the ADISC timed out and our attempt to cancel it
3265 * also failed, so we need to reset the CRQ.
Brian King989b8542008-07-22 08:31:47 -05003266 **/
3267static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3268{
3269 struct ibmvfc_passthru_mad *mad;
3270 struct ibmvfc_host *vhost = tgt->vhost;
3271 struct ibmvfc_event *evt;
3272
3273 if (vhost->discovery_threads >= disc_threads)
3274 return;
3275
3276 kref_get(&tgt->kref);
3277 evt = ibmvfc_get_event(vhost);
3278 vhost->discovery_threads++;
3279 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3280 evt->tgt = tgt;
3281
3282 ibmvfc_init_passthru(evt);
3283 mad = &evt->iu.passthru;
3284 mad->iu.flags = IBMVFC_FC_ELS;
3285 mad->iu.scsi_id = tgt->scsi_id;
Brian King10501e12009-03-20 15:44:39 -05003286 mad->iu.cancel_key = tgt->cancel_key;
Brian King989b8542008-07-22 08:31:47 -05003287
3288 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3289 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3290 sizeof(vhost->login_buf->resp.port_name));
3291 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3292 sizeof(vhost->login_buf->resp.node_name));
3293 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3294
Brian King10501e12009-03-20 15:44:39 -05003295 if (timer_pending(&tgt->timer))
3296 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3297 else {
3298 tgt->timer.data = (unsigned long) tgt;
3299 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3300 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3301 add_timer(&tgt->timer);
3302 }
3303
Brian King989b8542008-07-22 08:31:47 -05003304 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
Brian King10501e12009-03-20 15:44:39 -05003305 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
Brian King989b8542008-07-22 08:31:47 -05003306 vhost->discovery_threads--;
Brian King10501e12009-03-20 15:44:39 -05003307 del_timer(&tgt->timer);
Brian King989b8542008-07-22 08:31:47 -05003308 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3309 kref_put(&tgt->kref, ibmvfc_release_tgt);
3310 } else
3311 tgt_dbg(tgt, "Sent ADISC\n");
3312}
3313
3314/**
Brian King072b91f2008-07-01 13:14:30 -05003315 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3316 * @evt: ibmvfc event struct
3317 *
3318 **/
3319static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3320{
3321 struct ibmvfc_target *tgt = evt->tgt;
3322 struct ibmvfc_host *vhost = evt->vhost;
3323 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3324 u32 status = rsp->common.status;
3325
3326 vhost->discovery_threads--;
3327 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3328 switch (status) {
3329 case IBMVFC_MAD_SUCCESS:
3330 tgt_dbg(tgt, "Query Target succeeded\n");
3331 tgt->new_scsi_id = rsp->scsi_id;
3332 if (rsp->scsi_id != tgt->scsi_id)
3333 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
Brian King989b8542008-07-22 08:31:47 -05003334 else
3335 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
Brian King072b91f2008-07-01 13:14:30 -05003336 break;
3337 case IBMVFC_MAD_DRIVER_FAILED:
3338 break;
3339 case IBMVFC_MAD_CRQ_ERROR:
3340 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3341 break;
3342 case IBMVFC_MAD_FAILED:
3343 default:
3344 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3345 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3346 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3347 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3348
3349 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3350 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3351 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3352 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3353 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3354 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
Brian King10e79492008-10-29 08:46:45 -05003355 else
3356 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King072b91f2008-07-01 13:14:30 -05003357 break;
3358 };
3359
3360 kref_put(&tgt->kref, ibmvfc_release_tgt);
3361 ibmvfc_free_event(evt);
3362 wake_up(&vhost->work_wait_q);
3363}
3364
3365/**
3366 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3367 * @tgt: ibmvfc target struct
3368 *
3369 **/
3370static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3371{
3372 struct ibmvfc_query_tgt *query_tgt;
3373 struct ibmvfc_host *vhost = tgt->vhost;
3374 struct ibmvfc_event *evt;
3375
3376 if (vhost->discovery_threads >= disc_threads)
3377 return;
3378
3379 kref_get(&tgt->kref);
3380 evt = ibmvfc_get_event(vhost);
3381 vhost->discovery_threads++;
3382 evt->tgt = tgt;
3383 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3384 query_tgt = &evt->iu.query_tgt;
3385 memset(query_tgt, 0, sizeof(*query_tgt));
3386 query_tgt->common.version = 1;
3387 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3388 query_tgt->common.length = sizeof(*query_tgt);
3389 query_tgt->wwpn = tgt->ids.port_name;
3390
3391 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3392 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3393 vhost->discovery_threads--;
3394 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3395 kref_put(&tgt->kref, ibmvfc_release_tgt);
3396 } else
3397 tgt_dbg(tgt, "Sent Query Target\n");
3398}
3399
3400/**
3401 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3402 * @vhost: ibmvfc host struct
3403 * @scsi_id: SCSI ID to allocate target for
3404 *
3405 * Returns:
3406 * 0 on success / other on failure
3407 **/
3408static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3409{
3410 struct ibmvfc_target *tgt;
3411 unsigned long flags;
3412
3413 spin_lock_irqsave(vhost->host->host_lock, flags);
3414 list_for_each_entry(tgt, &vhost->targets, queue) {
3415 if (tgt->scsi_id == scsi_id) {
3416 if (tgt->need_login)
3417 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3418 goto unlock_out;
3419 }
3420 }
3421 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3422
3423 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
3424 if (!tgt) {
Stephen Rothwell775a42e2009-01-06 14:59:00 +00003425 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
Brian King072b91f2008-07-01 13:14:30 -05003426 scsi_id);
3427 return -ENOMEM;
3428 }
3429
Brian King0883e3b2009-02-04 16:13:12 -06003430 memset(tgt, 0, sizeof(*tgt));
Brian King072b91f2008-07-01 13:14:30 -05003431 tgt->scsi_id = scsi_id;
3432 tgt->new_scsi_id = scsi_id;
3433 tgt->vhost = vhost;
3434 tgt->need_login = 1;
Brian King10501e12009-03-20 15:44:39 -05003435 tgt->cancel_key = vhost->task_set++;
3436 init_timer(&tgt->timer);
Brian King072b91f2008-07-01 13:14:30 -05003437 kref_init(&tgt->kref);
3438 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3439 spin_lock_irqsave(vhost->host->host_lock, flags);
3440 list_add_tail(&tgt->queue, &vhost->targets);
3441
3442unlock_out:
3443 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3444 return 0;
3445}
3446
3447/**
3448 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3449 * @vhost: ibmvfc host struct
3450 *
3451 * Returns:
3452 * 0 on success / other on failure
3453 **/
3454static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3455{
3456 int i, rc;
3457
3458 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3459 rc = ibmvfc_alloc_target(vhost,
3460 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3461
3462 return rc;
3463}
3464
3465/**
3466 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3467 * @evt: ibmvfc event struct
3468 *
3469 **/
3470static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3471{
3472 struct ibmvfc_host *vhost = evt->vhost;
3473 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3474 u32 mad_status = rsp->common.status;
3475
3476 switch (mad_status) {
3477 case IBMVFC_MAD_SUCCESS:
3478 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3479 vhost->num_targets = rsp->num_written;
3480 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3481 break;
3482 case IBMVFC_MAD_FAILED:
3483 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n",
3484 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3485 ibmvfc_retry_host_init(vhost);
3486 break;
3487 case IBMVFC_MAD_DRIVER_FAILED:
3488 break;
3489 default:
3490 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3491 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3492 break;
3493 }
3494
3495 ibmvfc_free_event(evt);
3496 wake_up(&vhost->work_wait_q);
3497}
3498
3499/**
3500 * ibmvfc_discover_targets - Send Discover Targets MAD
3501 * @vhost: ibmvfc host struct
3502 *
3503 **/
3504static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3505{
3506 struct ibmvfc_discover_targets *mad;
3507 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3508
3509 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3510 mad = &evt->iu.discover_targets;
3511 memset(mad, 0, sizeof(*mad));
3512 mad->common.version = 1;
3513 mad->common.opcode = IBMVFC_DISC_TARGETS;
3514 mad->common.length = sizeof(*mad);
3515 mad->bufflen = vhost->disc_buf_sz;
3516 mad->buffer.va = vhost->disc_buf_dma;
3517 mad->buffer.len = vhost->disc_buf_sz;
3518 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3519
3520 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3521 ibmvfc_dbg(vhost, "Sent discover targets\n");
3522 else
3523 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3524}
3525
3526/**
3527 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3528 * @evt: ibmvfc event struct
3529 *
3530 **/
3531static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3532{
3533 struct ibmvfc_host *vhost = evt->vhost;
3534 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3535 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3536 unsigned int npiv_max_sectors;
3537
3538 switch (mad_status) {
3539 case IBMVFC_MAD_SUCCESS:
3540 ibmvfc_free_event(evt);
3541 break;
3542 case IBMVFC_MAD_FAILED:
3543 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n",
3544 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3545 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3546 ibmvfc_retry_host_init(vhost);
3547 else
3548 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3549 ibmvfc_free_event(evt);
3550 return;
3551 case IBMVFC_MAD_CRQ_ERROR:
3552 ibmvfc_retry_host_init(vhost);
3553 case IBMVFC_MAD_DRIVER_FAILED:
3554 ibmvfc_free_event(evt);
3555 return;
3556 default:
3557 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3558 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3559 ibmvfc_free_event(evt);
3560 return;
3561 }
3562
3563 vhost->client_migrated = 0;
3564
3565 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3566 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3567 rsp->flags);
3568 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3569 wake_up(&vhost->work_wait_q);
3570 return;
3571 }
3572
3573 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3574 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3575 rsp->max_cmds);
3576 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3577 wake_up(&vhost->work_wait_q);
3578 return;
3579 }
3580
3581 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3582 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3583 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3584 rsp->drc_name, npiv_max_sectors);
3585
3586 fc_host_fabric_name(vhost->host) = rsp->node_name;
3587 fc_host_node_name(vhost->host) = rsp->node_name;
3588 fc_host_port_name(vhost->host) = rsp->port_name;
3589 fc_host_port_id(vhost->host) = rsp->scsi_id;
3590 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3591 fc_host_supported_classes(vhost->host) = 0;
3592 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3593 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3594 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3595 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3596 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3597 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3598 fc_host_maxframe_size(vhost->host) =
3599 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3600
3601 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3602 vhost->host->max_sectors = npiv_max_sectors;
3603 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3604 wake_up(&vhost->work_wait_q);
3605}
3606
3607/**
3608 * ibmvfc_npiv_login - Sends NPIV login
3609 * @vhost: ibmvfc host struct
3610 *
3611 **/
3612static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3613{
3614 struct ibmvfc_npiv_login_mad *mad;
3615 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3616
3617 ibmvfc_gather_partition_info(vhost);
3618 ibmvfc_set_login_info(vhost);
3619 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3620
3621 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3622 mad = &evt->iu.npiv_login;
3623 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3624 mad->common.version = 1;
3625 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3626 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3627 mad->buffer.va = vhost->login_buf_dma;
3628 mad->buffer.len = sizeof(*vhost->login_buf);
3629
Brian King072b91f2008-07-01 13:14:30 -05003630 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3631
3632 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3633 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3634 else
3635 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3636};
3637
3638/**
3639 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3640 * @vhost: ibmvfc host struct
3641 *
3642 * Returns:
3643 * 1 if work to do / 0 if not
3644 **/
3645static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3646{
3647 struct ibmvfc_target *tgt;
3648
3649 list_for_each_entry(tgt, &vhost->targets, queue) {
3650 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3651 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3652 return 1;
3653 }
3654
3655 return 0;
3656}
3657
3658/**
3659 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3660 * @vhost: ibmvfc host struct
3661 *
3662 * Returns:
3663 * 1 if work to do / 0 if not
3664 **/
3665static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3666{
3667 struct ibmvfc_target *tgt;
3668
3669 if (kthread_should_stop())
3670 return 1;
3671 switch (vhost->action) {
3672 case IBMVFC_HOST_ACTION_NONE:
3673 case IBMVFC_HOST_ACTION_INIT_WAIT:
3674 return 0;
3675 case IBMVFC_HOST_ACTION_TGT_INIT:
3676 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3677 if (vhost->discovery_threads == disc_threads)
3678 return 0;
3679 list_for_each_entry(tgt, &vhost->targets, queue)
3680 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3681 return 1;
3682 list_for_each_entry(tgt, &vhost->targets, queue)
3683 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3684 return 0;
3685 return 1;
3686 case IBMVFC_HOST_ACTION_INIT:
3687 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3688 case IBMVFC_HOST_ACTION_TGT_ADD:
3689 case IBMVFC_HOST_ACTION_TGT_DEL:
Brian King10e79492008-10-29 08:46:45 -05003690 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -05003691 case IBMVFC_HOST_ACTION_QUERY:
3692 default:
3693 break;
3694 };
3695
3696 return 1;
3697}
3698
3699/**
3700 * ibmvfc_work_to_do - Is there task level work to do?
3701 * @vhost: ibmvfc host struct
3702 *
3703 * Returns:
3704 * 1 if work to do / 0 if not
3705 **/
3706static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3707{
3708 unsigned long flags;
3709 int rc;
3710
3711 spin_lock_irqsave(vhost->host->host_lock, flags);
3712 rc = __ibmvfc_work_to_do(vhost);
3713 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3714 return rc;
3715}
3716
3717/**
3718 * ibmvfc_log_ae - Log async events if necessary
3719 * @vhost: ibmvfc host struct
3720 * @events: events to log
3721 *
3722 **/
3723static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3724{
3725 if (events & IBMVFC_AE_RSCN)
3726 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3727 if ((events & IBMVFC_AE_LINKDOWN) &&
3728 vhost->state >= IBMVFC_HALTED)
3729 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3730 if ((events & IBMVFC_AE_LINKUP) &&
3731 vhost->state == IBMVFC_INITIALIZING)
3732 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3733}
3734
3735/**
3736 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3737 * @tgt: ibmvfc target struct
3738 *
3739 **/
3740static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3741{
3742 struct ibmvfc_host *vhost = tgt->vhost;
Brian King0883e3b2009-02-04 16:13:12 -06003743 struct fc_rport *rport = tgt->rport;
Brian King072b91f2008-07-01 13:14:30 -05003744 unsigned long flags;
3745
Brian King0883e3b2009-02-04 16:13:12 -06003746 if (rport) {
3747 tgt_dbg(tgt, "Setting rport roles\n");
3748 fc_remote_port_rolechg(rport, tgt->ids.roles);
3749 spin_lock_irqsave(vhost->host->host_lock, flags);
3750 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3751 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3752 return;
3753 }
3754
Brian King072b91f2008-07-01 13:14:30 -05003755 tgt_dbg(tgt, "Adding rport\n");
3756 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3757 spin_lock_irqsave(vhost->host->host_lock, flags);
3758 tgt->rport = rport;
3759 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3760 if (rport) {
3761 tgt_dbg(tgt, "rport add succeeded\n");
3762 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3763 rport->supported_classes = 0;
Brian King52d7e862008-07-22 08:31:46 -05003764 tgt->target_id = rport->scsi_target_id;
Brian King072b91f2008-07-01 13:14:30 -05003765 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3766 rport->supported_classes |= FC_COS_CLASS1;
3767 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3768 rport->supported_classes |= FC_COS_CLASS2;
3769 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3770 rport->supported_classes |= FC_COS_CLASS3;
3771 } else
3772 tgt_dbg(tgt, "rport add failed\n");
3773 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3774}
3775
3776/**
3777 * ibmvfc_do_work - Do task level work
3778 * @vhost: ibmvfc host struct
3779 *
3780 **/
3781static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3782{
3783 struct ibmvfc_target *tgt;
3784 unsigned long flags;
3785 struct fc_rport *rport;
3786
3787 ibmvfc_log_ae(vhost, vhost->events_to_log);
3788 spin_lock_irqsave(vhost->host->host_lock, flags);
3789 vhost->events_to_log = 0;
3790 switch (vhost->action) {
3791 case IBMVFC_HOST_ACTION_NONE:
3792 case IBMVFC_HOST_ACTION_INIT_WAIT:
3793 break;
3794 case IBMVFC_HOST_ACTION_INIT:
3795 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
Brian King1c41fa822008-12-03 11:02:54 -06003796 if (vhost->delay_init) {
3797 vhost->delay_init = 0;
3798 spin_unlock_irqrestore(vhost->host->host_lock, flags);
Brian Kingd2131b32008-12-18 09:26:51 -06003799 ssleep(15);
Brian King1c41fa822008-12-03 11:02:54 -06003800 return;
3801 } else
3802 vhost->job_step(vhost);
Brian King072b91f2008-07-01 13:14:30 -05003803 break;
3804 case IBMVFC_HOST_ACTION_QUERY:
3805 list_for_each_entry(tgt, &vhost->targets, queue)
3806 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3807 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3808 break;
3809 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3810 list_for_each_entry(tgt, &vhost->targets, queue) {
3811 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3812 tgt->job_step(tgt);
3813 break;
3814 }
3815 }
3816
3817 if (!ibmvfc_dev_init_to_do(vhost))
3818 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3819 break;
3820 case IBMVFC_HOST_ACTION_TGT_DEL:
Brian King10e79492008-10-29 08:46:45 -05003821 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -05003822 list_for_each_entry(tgt, &vhost->targets, queue) {
3823 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3824 tgt_dbg(tgt, "Deleting rport\n");
3825 rport = tgt->rport;
3826 tgt->rport = NULL;
3827 list_del(&tgt->queue);
3828 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3829 if (rport)
3830 fc_remote_port_delete(rport);
Brian King10501e12009-03-20 15:44:39 -05003831 del_timer_sync(&tgt->timer);
Brian King072b91f2008-07-01 13:14:30 -05003832 kref_put(&tgt->kref, ibmvfc_release_tgt);
3833 return;
3834 }
3835 }
3836
3837 if (vhost->state == IBMVFC_INITIALIZING) {
Brian King10e79492008-10-29 08:46:45 -05003838 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
3839 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3840 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD);
3841 vhost->init_retries = 0;
3842 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3843 scsi_unblock_requests(vhost->host);
3844 return;
3845 } else {
3846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3847 vhost->job_step = ibmvfc_discover_targets;
3848 }
Brian King072b91f2008-07-01 13:14:30 -05003849 } else {
3850 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3851 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3852 scsi_unblock_requests(vhost->host);
3853 wake_up(&vhost->init_wait_q);
3854 return;
3855 }
3856 break;
3857 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3858 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
3859 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3860 ibmvfc_alloc_targets(vhost);
3861 spin_lock_irqsave(vhost->host->host_lock, flags);
3862 break;
3863 case IBMVFC_HOST_ACTION_TGT_INIT:
3864 list_for_each_entry(tgt, &vhost->targets, queue) {
3865 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3866 tgt->job_step(tgt);
3867 break;
3868 }
3869 }
3870
Brian King10e79492008-10-29 08:46:45 -05003871 if (!ibmvfc_dev_init_to_do(vhost))
3872 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
Brian King072b91f2008-07-01 13:14:30 -05003873 break;
3874 case IBMVFC_HOST_ACTION_TGT_ADD:
3875 list_for_each_entry(tgt, &vhost->targets, queue) {
3876 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) {
3877 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3878 ibmvfc_tgt_add_rport(tgt);
3879 return;
Brian King072b91f2008-07-01 13:14:30 -05003880 }
3881 }
3882
Brian King915be022008-08-15 10:59:22 -05003883 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
Brian King072b91f2008-07-01 13:14:30 -05003884 vhost->reinit = 0;
Brian King915be022008-08-15 10:59:22 -05003885 scsi_block_requests(vhost->host);
Brian King072b91f2008-07-01 13:14:30 -05003886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3887 } else {
3888 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3889 wake_up(&vhost->init_wait_q);
3890 }
3891 break;
3892 default:
3893 break;
3894 };
3895
3896 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3897}
3898
3899/**
3900 * ibmvfc_work - Do task level work
3901 * @data: ibmvfc host struct
3902 *
3903 * Returns:
3904 * zero
3905 **/
3906static int ibmvfc_work(void *data)
3907{
3908 struct ibmvfc_host *vhost = data;
3909 int rc;
3910
3911 set_user_nice(current, -20);
3912
3913 while (1) {
3914 rc = wait_event_interruptible(vhost->work_wait_q,
3915 ibmvfc_work_to_do(vhost));
3916
3917 BUG_ON(rc);
3918
3919 if (kthread_should_stop())
3920 break;
3921
3922 ibmvfc_do_work(vhost);
3923 }
3924
3925 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
3926 return 0;
3927}
3928
3929/**
3930 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3931 * @vhost: ibmvfc host struct
3932 *
3933 * Allocates a page for messages, maps it for dma, and registers
3934 * the crq with the hypervisor.
3935 *
3936 * Return value:
3937 * zero on success / other on failure
3938 **/
3939static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
3940{
3941 int rc, retrc = -ENOMEM;
3942 struct device *dev = vhost->dev;
3943 struct vio_dev *vdev = to_vio_dev(dev);
3944 struct ibmvfc_crq_queue *crq = &vhost->crq;
3945
3946 ENTER;
3947 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
3948
3949 if (!crq->msgs)
3950 return -ENOMEM;
3951
3952 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3953 crq->msg_token = dma_map_single(dev, crq->msgs,
3954 PAGE_SIZE, DMA_BIDIRECTIONAL);
3955
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07003956 if (dma_mapping_error(dev, crq->msg_token))
Brian King072b91f2008-07-01 13:14:30 -05003957 goto map_failed;
3958
3959 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3960 crq->msg_token, PAGE_SIZE);
3961
3962 if (rc == H_RESOURCE)
3963 /* maybe kexecing and resource is busy. try a reset */
3964 retrc = rc = ibmvfc_reset_crq(vhost);
3965
3966 if (rc == H_CLOSED)
3967 dev_warn(dev, "Partner adapter not ready\n");
3968 else if (rc) {
3969 dev_warn(dev, "Error %d opening adapter\n", rc);
3970 goto reg_crq_failed;
3971 }
3972
3973 retrc = 0;
3974
Brian King039a0892009-03-20 15:44:35 -05003975 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
3976
Brian King072b91f2008-07-01 13:14:30 -05003977 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
3978 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
3979 goto req_irq_failed;
3980 }
3981
3982 if ((rc = vio_enable_interrupts(vdev))) {
3983 dev_err(dev, "Error %d enabling interrupts\n", rc);
3984 goto req_irq_failed;
3985 }
3986
3987 crq->cur = 0;
3988 LEAVE;
3989 return retrc;
3990
3991req_irq_failed:
Brian King039a0892009-03-20 15:44:35 -05003992 tasklet_kill(&vhost->tasklet);
Brian King072b91f2008-07-01 13:14:30 -05003993 do {
3994 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3995 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3996reg_crq_failed:
3997 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3998map_failed:
3999 free_page((unsigned long)crq->msgs);
4000 return retrc;
4001}
4002
4003/**
4004 * ibmvfc_free_mem - Free memory for vhost
4005 * @vhost: ibmvfc host struct
4006 *
4007 * Return value:
4008 * none
4009 **/
4010static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4011{
4012 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4013
4014 ENTER;
4015 mempool_destroy(vhost->tgt_pool);
4016 kfree(vhost->trace);
4017 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4018 vhost->disc_buf_dma);
4019 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4020 vhost->login_buf, vhost->login_buf_dma);
4021 dma_pool_destroy(vhost->sg_pool);
4022 dma_unmap_single(vhost->dev, async_q->msg_token,
4023 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4024 free_page((unsigned long)async_q->msgs);
4025 LEAVE;
4026}
4027
4028/**
4029 * ibmvfc_alloc_mem - Allocate memory for vhost
4030 * @vhost: ibmvfc host struct
4031 *
4032 * Return value:
4033 * 0 on success / non-zero on failure
4034 **/
4035static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4036{
4037 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4038 struct device *dev = vhost->dev;
4039
4040 ENTER;
4041 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4042 if (!async_q->msgs) {
4043 dev_err(dev, "Couldn't allocate async queue.\n");
4044 goto nomem;
4045 }
4046
4047 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4048 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4049 async_q->size * sizeof(*async_q->msgs),
4050 DMA_BIDIRECTIONAL);
4051
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07004052 if (dma_mapping_error(dev, async_q->msg_token)) {
Brian King072b91f2008-07-01 13:14:30 -05004053 dev_err(dev, "Failed to map async queue\n");
4054 goto free_async_crq;
4055 }
4056
4057 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4058 SG_ALL * sizeof(struct srp_direct_buf),
4059 sizeof(struct srp_direct_buf), 0);
4060
4061 if (!vhost->sg_pool) {
4062 dev_err(dev, "Failed to allocate sg pool\n");
4063 goto unmap_async_crq;
4064 }
4065
4066 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4067 &vhost->login_buf_dma, GFP_KERNEL);
4068
4069 if (!vhost->login_buf) {
4070 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4071 goto free_sg_pool;
4072 }
4073
4074 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4075 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4076 &vhost->disc_buf_dma, GFP_KERNEL);
4077
4078 if (!vhost->disc_buf) {
4079 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4080 goto free_login_buffer;
4081 }
4082
4083 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4084 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4085
4086 if (!vhost->trace)
4087 goto free_disc_buffer;
4088
4089 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4090 sizeof(struct ibmvfc_target));
4091
4092 if (!vhost->tgt_pool) {
4093 dev_err(dev, "Couldn't allocate target memory pool\n");
4094 goto free_trace;
4095 }
4096
4097 LEAVE;
4098 return 0;
4099
4100free_trace:
4101 kfree(vhost->trace);
4102free_disc_buffer:
4103 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4104 vhost->disc_buf_dma);
4105free_login_buffer:
4106 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4107 vhost->login_buf, vhost->login_buf_dma);
4108free_sg_pool:
4109 dma_pool_destroy(vhost->sg_pool);
4110unmap_async_crq:
4111 dma_unmap_single(dev, async_q->msg_token,
4112 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4113free_async_crq:
4114 free_page((unsigned long)async_q->msgs);
4115nomem:
4116 LEAVE;
4117 return -ENOMEM;
4118}
4119
4120/**
4121 * ibmvfc_probe - Adapter hot plug add entry point
4122 * @vdev: vio device struct
4123 * @id: vio device id struct
4124 *
4125 * Return value:
4126 * 0 on success / non-zero on failure
4127 **/
4128static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4129{
4130 struct ibmvfc_host *vhost;
4131 struct Scsi_Host *shost;
4132 struct device *dev = &vdev->dev;
4133 int rc = -ENOMEM;
4134
4135 ENTER;
4136 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4137 if (!shost) {
4138 dev_err(dev, "Couldn't allocate host data\n");
4139 goto out;
4140 }
4141
4142 shost->transportt = ibmvfc_transport_template;
4143 shost->can_queue = max_requests;
4144 shost->max_lun = max_lun;
4145 shost->max_id = max_targets;
4146 shost->max_sectors = IBMVFC_MAX_SECTORS;
4147 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4148 shost->unique_id = shost->host_no;
4149
4150 vhost = shost_priv(shost);
4151 INIT_LIST_HEAD(&vhost->sent);
4152 INIT_LIST_HEAD(&vhost->free);
4153 INIT_LIST_HEAD(&vhost->targets);
4154 sprintf(vhost->name, IBMVFC_NAME);
4155 vhost->host = shost;
4156 vhost->dev = dev;
4157 vhost->partition_number = -1;
4158 vhost->log_level = log_level;
Brian King10501e12009-03-20 15:44:39 -05004159 vhost->task_set = 1;
Brian King072b91f2008-07-01 13:14:30 -05004160 strcpy(vhost->partition_name, "UNKNOWN");
4161 init_waitqueue_head(&vhost->work_wait_q);
4162 init_waitqueue_head(&vhost->init_wait_q);
4163
4164 if ((rc = ibmvfc_alloc_mem(vhost)))
4165 goto free_scsi_host;
4166
4167 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4168 shost->host_no);
4169
4170 if (IS_ERR(vhost->work_thread)) {
4171 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4172 PTR_ERR(vhost->work_thread));
4173 goto free_host_mem;
4174 }
4175
4176 if ((rc = ibmvfc_init_crq(vhost))) {
4177 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4178 goto kill_kthread;
4179 }
4180
4181 if ((rc = ibmvfc_init_event_pool(vhost))) {
4182 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4183 goto release_crq;
4184 }
4185
4186 if ((rc = scsi_add_host(shost, dev)))
4187 goto release_event_pool;
4188
4189 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4190 &ibmvfc_trace_attr))) {
4191 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4192 goto remove_shost;
4193 }
4194
4195 dev_set_drvdata(dev, vhost);
4196 spin_lock(&ibmvfc_driver_lock);
4197 list_add_tail(&vhost->queue, &ibmvfc_head);
4198 spin_unlock(&ibmvfc_driver_lock);
4199
4200 ibmvfc_send_crq_init(vhost);
4201 scsi_scan_host(shost);
4202 return 0;
4203
4204remove_shost:
4205 scsi_remove_host(shost);
4206release_event_pool:
4207 ibmvfc_free_event_pool(vhost);
4208release_crq:
4209 ibmvfc_release_crq_queue(vhost);
4210kill_kthread:
4211 kthread_stop(vhost->work_thread);
4212free_host_mem:
4213 ibmvfc_free_mem(vhost);
4214free_scsi_host:
4215 scsi_host_put(shost);
4216out:
4217 LEAVE;
4218 return rc;
4219}
4220
4221/**
4222 * ibmvfc_remove - Adapter hot plug remove entry point
4223 * @vdev: vio device struct
4224 *
4225 * Return value:
4226 * 0
4227 **/
4228static int ibmvfc_remove(struct vio_dev *vdev)
4229{
4230 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4231 unsigned long flags;
4232
4233 ENTER;
4234 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
Brian King2d0da2a2008-07-22 08:31:42 -05004235 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4236 ibmvfc_wait_while_resetting(vhost);
4237 ibmvfc_release_crq_queue(vhost);
Brian King072b91f2008-07-01 13:14:30 -05004238 kthread_stop(vhost->work_thread);
4239 fc_remove_host(vhost->host);
4240 scsi_remove_host(vhost->host);
Brian King072b91f2008-07-01 13:14:30 -05004241
4242 spin_lock_irqsave(vhost->host->host_lock, flags);
4243 ibmvfc_purge_requests(vhost, DID_ERROR);
4244 ibmvfc_free_event_pool(vhost);
4245 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4246
4247 ibmvfc_free_mem(vhost);
4248 spin_lock(&ibmvfc_driver_lock);
4249 list_del(&vhost->queue);
4250 spin_unlock(&ibmvfc_driver_lock);
4251 scsi_host_put(vhost->host);
4252 LEAVE;
4253 return 0;
4254}
4255
Brian King39c1ffe2008-07-24 04:35:48 +10004256/**
4257 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4258 * @vdev: vio device struct
4259 *
4260 * Return value:
4261 * Number of bytes the driver will need to DMA map at the same time in
4262 * order to perform well.
4263 */
4264static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4265{
4266 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4267 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4268}
4269
Brian King072b91f2008-07-01 13:14:30 -05004270static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4271 {"fcp", "IBM,vfc-client"},
4272 { "", "" }
4273};
4274MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4275
4276static struct vio_driver ibmvfc_driver = {
4277 .id_table = ibmvfc_device_table,
4278 .probe = ibmvfc_probe,
4279 .remove = ibmvfc_remove,
Brian King39c1ffe2008-07-24 04:35:48 +10004280 .get_desired_dma = ibmvfc_get_desired_dma,
Brian King072b91f2008-07-01 13:14:30 -05004281 .driver = {
4282 .name = IBMVFC_NAME,
4283 .owner = THIS_MODULE,
4284 }
4285};
4286
4287static struct fc_function_template ibmvfc_transport_functions = {
4288 .show_host_fabric_name = 1,
4289 .show_host_node_name = 1,
4290 .show_host_port_name = 1,
4291 .show_host_supported_classes = 1,
4292 .show_host_port_type = 1,
4293 .show_host_port_id = 1,
Brian King9ab36102009-03-20 15:44:38 -05004294 .show_host_maxframe_size = 1,
Brian King072b91f2008-07-01 13:14:30 -05004295
4296 .get_host_port_state = ibmvfc_get_host_port_state,
4297 .show_host_port_state = 1,
4298
4299 .get_host_speed = ibmvfc_get_host_speed,
4300 .show_host_speed = 1,
4301
4302 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4303 .terminate_rport_io = ibmvfc_terminate_rport_io,
4304
4305 .show_rport_maxframe_size = 1,
4306 .show_rport_supported_classes = 1,
4307
4308 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4309 .show_rport_dev_loss_tmo = 1,
4310
4311 .get_starget_node_name = ibmvfc_get_starget_node_name,
4312 .show_starget_node_name = 1,
4313
4314 .get_starget_port_name = ibmvfc_get_starget_port_name,
4315 .show_starget_port_name = 1,
4316
4317 .get_starget_port_id = ibmvfc_get_starget_port_id,
4318 .show_starget_port_id = 1,
4319};
4320
4321/**
4322 * ibmvfc_module_init - Initialize the ibmvfc module
4323 *
4324 * Return value:
4325 * 0 on success / other on failure
4326 **/
4327static int __init ibmvfc_module_init(void)
4328{
4329 int rc;
4330
4331 if (!firmware_has_feature(FW_FEATURE_VIO))
4332 return -ENODEV;
4333
4334 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4335 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4336
4337 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4338 if (!ibmvfc_transport_template)
4339 return -ENOMEM;
4340
4341 rc = vio_register_driver(&ibmvfc_driver);
4342 if (rc)
4343 fc_release_transport(ibmvfc_transport_template);
4344 return rc;
4345}
4346
4347/**
4348 * ibmvfc_module_exit - Teardown the ibmvfc module
4349 *
4350 * Return value:
4351 * nothing
4352 **/
4353static void __exit ibmvfc_module_exit(void)
4354{
4355 vio_unregister_driver(&ibmvfc_driver);
4356 fc_release_transport(ibmvfc_transport_template);
4357}
4358
4359module_init(ibmvfc_module_init);
4360module_exit(ibmvfc_module_exit);