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[SCSI] ibmvfc: Improve device rediscovery
[net-next-2.6.git] / drivers / scsi / ibmvscsi / ibmvfc.c
CommitLineData
072b91f9
BK		 1/*
2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
3 *
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
5 *
6 * Copyright (C) IBM Corporation, 2008
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/dma-mapping.h>
27#include <linux/dmapool.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/kthread.h>
31#include <linux/of.h>
32#include <linux/stringify.h>
33#include <asm/firmware.h>
34#include <asm/irq.h>
35#include <asm/vio.h>
36#include <scsi/scsi.h>
37#include <scsi/scsi_cmnd.h>
38#include <scsi/scsi_host.h>
39#include <scsi/scsi_device.h>
40#include <scsi/scsi_tcq.h>
41#include <scsi/scsi_transport_fc.h>
42#include "ibmvfc.h"
43
44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
46static unsigned int max_lun = IBMVFC_MAX_LUN;
47static unsigned int max_targets = IBMVFC_MAX_TARGETS;
48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
51static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
53static LIST_HEAD(ibmvfc_head);
54static DEFINE_SPINLOCK(ibmvfc_driver_lock);
55static struct scsi_transport_template *ibmvfc_transport_template;
56
57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59MODULE_LICENSE("GPL");
60MODULE_VERSION(IBMVFC_DRIVER_VERSION);
61
62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
66MODULE_PARM_DESC(default_timeout,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
69module_param_named(max_requests, max_requests, uint, S_IRUGO);
70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
72module_param_named(max_lun, max_lun, uint, S_IRUGO);
73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
75module_param_named(max_targets, max_targets, uint, S_IRUGO);
76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
545ef9a2 78module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
072b91f9
BK		 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
82MODULE_PARM_DESC(debug, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG) "]");
84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
89module_param_named(log_level, log_level, uint, 0);
90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
92
93static const struct {
94 u16 status;
95 u16 error;
96 u8 result;
97 u8 retry;
98 int log;
99 char *name;
100} cmd_status [] = {
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
752b3232 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
072b91f9
BK		 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
497f9c50 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
072b91f9
BK		 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" },
752b3232
BK		 118 { 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" },
072b91f9 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
752b3232
BK		 121 { 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" },
072b91f9 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
646d3857 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
072b91f9
BK		 125 { 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 *);
79111d08 146static void ibmvfc_npiv_logout(struct ibmvfc_host *);
072b91f9
BK		 147
148static const char *unknown_error = "unknown error";
149
150#ifdef CONFIG_SCSI_IBMVFC_TRACE
151/**
152 * ibmvfc_trc_start - Log a start trace entry
153 * @evt: ibmvfc event struct
154 *
155 **/
156static void ibmvfc_trc_start(struct ibmvfc_event *evt)
157{
158 struct ibmvfc_host *vhost = evt->vhost;
159 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
160 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
161 struct ibmvfc_trace_entry *entry;
162
163 entry = &vhost->trace[vhost->trace_index++];
164 entry->evt = evt;
165 entry->time = jiffies;
166 entry->fmt = evt->crq.format;
167 entry->type = IBMVFC_TRC_START;
168
169 switch (entry->fmt) {
170 case IBMVFC_CMD_FORMAT:
171 entry->op_code = vfc_cmd->iu.cdb[0];
172 entry->scsi_id = vfc_cmd->tgt_scsi_id;
173 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
174 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
175 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
176 break;
177 case IBMVFC_MAD_FORMAT:
178 entry->op_code = mad->opcode;
179 break;
180 default:
181 break;
182 };
183}
184
185/**
186 * ibmvfc_trc_end - Log an end trace entry
187 * @evt: ibmvfc event struct
188 *
189 **/
190static void ibmvfc_trc_end(struct ibmvfc_event *evt)
191{
192 struct ibmvfc_host *vhost = evt->vhost;
193 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
194 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
195 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
196
197 entry->evt = evt;
198 entry->time = jiffies;
199 entry->fmt = evt->crq.format;
200 entry->type = IBMVFC_TRC_END;
201
202 switch (entry->fmt) {
203 case IBMVFC_CMD_FORMAT:
204 entry->op_code = vfc_cmd->iu.cdb[0];
205 entry->scsi_id = vfc_cmd->tgt_scsi_id;
206 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
207 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
208 entry->u.end.status = vfc_cmd->status;
209 entry->u.end.error = vfc_cmd->error;
210 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
211 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
212 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
213 break;
214 case IBMVFC_MAD_FORMAT:
215 entry->op_code = mad->opcode;
216 entry->u.end.status = mad->status;
217 break;
218 default:
219 break;
220
221 };
222}
223
224#else
225#define ibmvfc_trc_start(evt) do { } while (0)
226#define ibmvfc_trc_end(evt) do { } while (0)
227#endif
228
229/**
230 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
231 * @status: status / error class
232 * @error: error
233 *
234 * Return value:
235 * index into cmd_status / -EINVAL on failure
236 **/
237static int ibmvfc_get_err_index(u16 status, u16 error)
238{
239 int i;
240
241 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
242 if ((cmd_status[i].status & status) == cmd_status[i].status &&
243 cmd_status[i].error == error)
244 return i;
245
246 return -EINVAL;
247}
248
249/**
250 * ibmvfc_get_cmd_error - Find the error description for the fcp response
251 * @status: status / error class
252 * @error: error
253 *
254 * Return value:
255 * error description string
256 **/
257static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
258{
259 int rc = ibmvfc_get_err_index(status, error);
260 if (rc >= 0)
261 return cmd_status[rc].name;
262 return unknown_error;
263}
264
265/**
266 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
267 * @vfc_cmd: ibmvfc command struct
268 *
269 * Return value:
270 * SCSI result value to return for completed command
271 **/
272static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
273{
274 int err;
275 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
276 int fc_rsp_len = rsp->fcp_rsp_len;
277
278 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
4a2837d4 279 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
072b91f9
BK		 280 rsp->data.info.rsp_code))
281 return DID_ERROR << 16;
282
072b91f9
BK		 283 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
284 if (err >= 0)
285 return rsp->scsi_status | (cmd_status[err].result << 16);
286 return rsp->scsi_status | (DID_ERROR << 16);
287}
288
289/**
290 * ibmvfc_retry_cmd - Determine if error status is retryable
291 * @status: status / error class
292 * @error: error
293 *
294 * Return value:
295 * 1 if error should be retried / 0 if it should not
296 **/
297static int ibmvfc_retry_cmd(u16 status, u16 error)
298{
299 int rc = ibmvfc_get_err_index(status, error);
300
301 if (rc >= 0)
302 return cmd_status[rc].retry;
303 return 1;
304}
305
306static const char *unknown_fc_explain = "unknown fc explain";
307
308static const struct {
309 u16 fc_explain;
310 char *name;
311} ls_explain [] = {
312 { 0x00, "no additional explanation" },
313 { 0x01, "service parameter error - options" },
314 { 0x03, "service parameter error - initiator control" },
315 { 0x05, "service parameter error - recipient control" },
316 { 0x07, "service parameter error - received data field size" },
317 { 0x09, "service parameter error - concurrent seq" },
318 { 0x0B, "service parameter error - credit" },
319 { 0x0D, "invalid N_Port/F_Port_Name" },
320 { 0x0E, "invalid node/Fabric Name" },
321 { 0x0F, "invalid common service parameters" },
322 { 0x11, "invalid association header" },
323 { 0x13, "association header required" },
324 { 0x15, "invalid originator S_ID" },
325 { 0x17, "invalid OX_ID-RX-ID combination" },
326 { 0x19, "command (request) already in progress" },
327 { 0x1E, "N_Port Login requested" },
328 { 0x1F, "Invalid N_Port_ID" },
329};
330
331static const struct {
332 u16 fc_explain;
333 char *name;
334} gs_explain [] = {
335 { 0x00, "no additional explanation" },
336 { 0x01, "port identifier not registered" },
337 { 0x02, "port name not registered" },
338 { 0x03, "node name not registered" },
339 { 0x04, "class of service not registered" },
340 { 0x06, "initial process associator not registered" },
341 { 0x07, "FC-4 TYPEs not registered" },
342 { 0x08, "symbolic port name not registered" },
343 { 0x09, "symbolic node name not registered" },
344 { 0x0A, "port type not registered" },
345 { 0xF0, "authorization exception" },
346 { 0xF1, "authentication exception" },
347 { 0xF2, "data base full" },
348 { 0xF3, "data base empty" },
349 { 0xF4, "processing request" },
350 { 0xF5, "unable to verify connection" },
351 { 0xF6, "devices not in a common zone" },
352};
353
354/**
355 * ibmvfc_get_ls_explain - Return the FC Explain description text
356 * @status: FC Explain status
357 *
358 * Returns:
359 * error string
360 **/
361static const char *ibmvfc_get_ls_explain(u16 status)
362{
363 int i;
364
365 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
366 if (ls_explain[i].fc_explain == status)
367 return ls_explain[i].name;
368
369 return unknown_fc_explain;
370}
371
372/**
373 * ibmvfc_get_gs_explain - Return the FC Explain description text
374 * @status: FC Explain status
375 *
376 * Returns:
377 * error string
378 **/
379static const char *ibmvfc_get_gs_explain(u16 status)
380{
381 int i;
382
383 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
384 if (gs_explain[i].fc_explain == status)
385 return gs_explain[i].name;
386
387 return unknown_fc_explain;
388}
389
390static const struct {
391 enum ibmvfc_fc_type fc_type;
392 char *name;
393} fc_type [] = {
394 { IBMVFC_FABRIC_REJECT, "fabric reject" },
395 { IBMVFC_PORT_REJECT, "port reject" },
396 { IBMVFC_LS_REJECT, "ELS reject" },
397 { IBMVFC_FABRIC_BUSY, "fabric busy" },
398 { IBMVFC_PORT_BUSY, "port busy" },
399 { IBMVFC_BASIC_REJECT, "basic reject" },
400};
401
402static const char *unknown_fc_type = "unknown fc type";
403
404/**
405 * ibmvfc_get_fc_type - Return the FC Type description text
406 * @status: FC Type error status
407 *
408 * Returns:
409 * error string
410 **/
411static const char *ibmvfc_get_fc_type(u16 status)
412{
413 int i;
414
415 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
416 if (fc_type[i].fc_type == status)
417 return fc_type[i].name;
418
419 return unknown_fc_type;
420}
421
422/**
423 * ibmvfc_set_tgt_action - Set the next init action for the target
424 * @tgt: ibmvfc target struct
425 * @action: action to perform
426 *
427 **/
428static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
429 enum ibmvfc_target_action action)
430{
431 switch (tgt->action) {
432 case IBMVFC_TGT_ACTION_DEL_RPORT:
433 break;
434 default:
43c8da90
BK		 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
436 tgt->add_rport = 0;
072b91f9
BK		 437 tgt->action = action;
438 break;
439 }
440}
441
442/**
443 * ibmvfc_set_host_state - Set the state for the host
444 * @vhost: ibmvfc host struct
445 * @state: state to set host to
446 *
447 * Returns:
448 * 0 if state changed / non-zero if not changed
449 **/
450static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
451 enum ibmvfc_host_state state)
452{
453 int rc = 0;
454
455 switch (vhost->state) {
456 case IBMVFC_HOST_OFFLINE:
457 rc = -EINVAL;
458 break;
459 default:
460 vhost->state = state;
461 break;
462 };
463
464 return rc;
465}
466
467/**
468 * ibmvfc_set_host_action - Set the next init action for the host
469 * @vhost: ibmvfc host struct
470 * @action: action to perform
471 *
472 **/
473static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
474 enum ibmvfc_host_action action)
475{
476 switch (action) {
477 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
479 vhost->action = action;
480 break;
79111d08
BK		 481 case IBMVFC_HOST_ACTION_LOGO_WAIT:
482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
483 vhost->action = action;
484 break;
072b91f9
BK		 485 case IBMVFC_HOST_ACTION_INIT_WAIT:
486 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
487 vhost->action = action;
488 break;
489 case IBMVFC_HOST_ACTION_QUERY:
490 switch (vhost->action) {
491 case IBMVFC_HOST_ACTION_INIT_WAIT:
492 case IBMVFC_HOST_ACTION_NONE:
43c8da90 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 494 vhost->action = action;
495 break;
496 default:
497 break;
498 };
499 break;
500 case IBMVFC_HOST_ACTION_TGT_INIT:
501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
502 vhost->action = action;
503 break;
79111d08 504 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 505 case IBMVFC_HOST_ACTION_INIT:
506 case IBMVFC_HOST_ACTION_TGT_DEL:
507 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 509 case IBMVFC_HOST_ACTION_NONE:
510 default:
511 vhost->action = action;
512 break;
513 };
514}
515
516/**
517 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
518 * @vhost: ibmvfc host struct
519 *
520 * Return value:
521 * nothing
522 **/
523static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
524{
525 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 526 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
527 scsi_block_requests(vhost->host);
528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
529 }
072b91f9
BK		 530 } else
531 vhost->reinit = 1;
532
533 wake_up(&vhost->work_wait_q);
534}
535
536/**
537 * ibmvfc_link_down - Handle a link down event from the adapter
538 * @vhost: ibmvfc host struct
539 * @state: ibmvfc host state to enter
540 *
541 **/
542static void ibmvfc_link_down(struct ibmvfc_host *vhost,
543 enum ibmvfc_host_state state)
544{
545 struct ibmvfc_target *tgt;
546
547 ENTER;
548 scsi_block_requests(vhost->host);
549 list_for_each_entry(tgt, &vhost->targets, queue)
550 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
551 ibmvfc_set_host_state(vhost, state);
552 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
553 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
554 wake_up(&vhost->work_wait_q);
555 LEAVE;
556}
557
558/**
559 * ibmvfc_init_host - Start host initialization
560 * @vhost: ibmvfc host struct
cf6f10d7 561 * @relogin: is this a re-login?
072b91f9
BK		 562 *
563 * Return value:
564 * nothing
565 **/
cf6f10d7 566static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
072b91f9
BK		 567{
568 struct ibmvfc_target *tgt;
569
570 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82 571 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 572 dev_err(vhost->dev,
573 "Host initialization retries exceeded. Taking adapter offline\n");
574 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
575 return;
576 }
577 }
578
579 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
cf6f10d7
BK		 580 if (!relogin) {
581 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
582 vhost->async_crq.cur = 0;
583 }
584
072b91f9 585 list_for_each_entry(tgt, &vhost->targets, queue)
5e47167b 586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 587 scsi_block_requests(vhost->host);
588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
589 vhost->job_step = ibmvfc_npiv_login;
590 wake_up(&vhost->work_wait_q);
591 }
592}
593
594/**
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
599 *
600 * Return value:
601 * 0 on success / other on failure
602 **/
603static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
604{
605 struct vio_dev *vdev = to_vio_dev(vhost->dev);
606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
607}
608
609/**
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
612 *
613 * Return value:
614 * 0 on success / other on failure
615 **/
616static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
617{
618 ibmvfc_dbg(vhost, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
620}
621
622/**
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
625 *
626 * Return value:
627 * 0 on success / other on failure
628 **/
629static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
630{
631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
633}
634
635/**
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
638 *
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
641 **/
642static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
643{
644 long rc;
645 struct vio_dev *vdev = to_vio_dev(vhost->dev);
646 struct ibmvfc_crq_queue *crq = &vhost->crq;
647
648 ibmvfc_dbg(vhost, "Releasing CRQ\n");
649 free_irq(vdev->irq, vhost);
039a0898 650 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 651 do {
652 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
653 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
654
655 vhost->state = IBMVFC_NO_CRQ;
79111d08 656 vhost->logged_in = 0;
072b91f9
BK		 657 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
658 free_page((unsigned long)crq->msgs);
659}
660
661/**
662 * ibmvfc_reenable_crq_queue - reenables the CRQ
663 * @vhost: ibmvfc host struct
664 *
665 * Return value:
666 * 0 on success / other on failure
667 **/
668static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
669{
670 int rc;
671 struct vio_dev *vdev = to_vio_dev(vhost->dev);
672
673 /* Re-enable the CRQ */
674 do {
675 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
676 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
677
678 if (rc)
679 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
680
681 return rc;
682}
683
684/**
685 * ibmvfc_reset_crq - resets a crq after a failure
686 * @vhost: ibmvfc host struct
687 *
688 * Return value:
689 * 0 on success / other on failure
690 **/
691static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
692{
693 int rc;
694 struct vio_dev *vdev = to_vio_dev(vhost->dev);
695 struct ibmvfc_crq_queue *crq = &vhost->crq;
696
697 /* Close the CRQ */
698 do {
699 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
700 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
701
702 vhost->state = IBMVFC_NO_CRQ;
79111d08 703 vhost->logged_in = 0;
072b91f9
BK		 704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
705
706 /* Clean out the queue */
707 memset(crq->msgs, 0, PAGE_SIZE);
708 crq->cur = 0;
709
710 /* And re-open it again */
711 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
712 crq->msg_token, PAGE_SIZE);
713
714 if (rc == H_CLOSED)
715 /* Adapter is good, but other end is not ready */
716 dev_warn(vhost->dev, "Partner adapter not ready\n");
717 else if (rc != 0)
718 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
719
720 return rc;
721}
722
723/**
724 * ibmvfc_valid_event - Determines if event is valid.
725 * @pool: event_pool that contains the event
726 * @evt: ibmvfc event to be checked for validity
727 *
728 * Return value:
729 * 1 if event is valid / 0 if event is not valid
730 **/
731static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
732 struct ibmvfc_event *evt)
733{
734 int index = evt - pool->events;
735 if (index < 0 || index >= pool->size) /* outside of bounds */
736 return 0;
737 if (evt != pool->events + index) /* unaligned */
738 return 0;
739 return 1;
740}
741
742/**
743 * ibmvfc_free_event - Free the specified event
744 * @evt: ibmvfc_event to be freed
745 *
746 **/
747static void ibmvfc_free_event(struct ibmvfc_event *evt)
748{
749 struct ibmvfc_host *vhost = evt->vhost;
750 struct ibmvfc_event_pool *pool = &vhost->pool;
751
752 BUG_ON(!ibmvfc_valid_event(pool, evt));
753 BUG_ON(atomic_inc_return(&evt->free) != 1);
754 list_add_tail(&evt->queue, &vhost->free);
755}
756
757/**
758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
759 * @evt: ibmvfc event struct
760 *
761 * This function does not setup any error status, that must be done
762 * before this function gets called.
763 **/
764static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
765{
766 struct scsi_cmnd *cmnd = evt->cmnd;
767
768 if (cmnd) {
769 scsi_dma_unmap(cmnd);
770 cmnd->scsi_done(cmnd);
771 }
772
ad8dcffa
BK		 773 if (evt->eh_comp)
774 complete(evt->eh_comp);
775
072b91f9
BK		 776 ibmvfc_free_event(evt);
777}
778
779/**
780 * ibmvfc_fail_request - Fail request with specified error code
781 * @evt: ibmvfc event struct
782 * @error_code: error code to fail request with
783 *
784 * Return value:
785 * none
786 **/
787static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
788{
789 if (evt->cmnd) {
790 evt->cmnd->result = (error_code << 16);
791 evt->done = ibmvfc_scsi_eh_done;
792 } else
793 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
794
795 list_del(&evt->queue);
796 del_timer(&evt->timer);
797 ibmvfc_trc_end(evt);
798 evt->done(evt);
799}
800
801/**
802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
803 * @vhost: ibmvfc host struct
804 * @error_code: error code to fail requests with
805 *
806 * Return value:
807 * none
808 **/
809static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
810{
811 struct ibmvfc_event *evt, *pos;
812
813 ibmvfc_dbg(vhost, "Purging all requests\n");
814 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
815 ibmvfc_fail_request(evt, error_code);
816}
817
818/**
79111d08 819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
072b91f9
BK		 820 * @vhost: struct ibmvfc host to reset
821 **/
79111d08 822static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
072b91f9
BK		 823{
824 int rc;
825
826 scsi_block_requests(vhost->host);
827 ibmvfc_purge_requests(vhost, DID_ERROR);
828 if ((rc = ibmvfc_reset_crq(vhost)) ||
829 (rc = ibmvfc_send_crq_init(vhost)) ||
830 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
831 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
832 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
833 } else
834 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
835}
836
837/**
79111d08 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
072b91f9
BK		 839 * @vhost: struct ibmvfc host to reset
840 **/
79111d08
BK		 841static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
842{
843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
845 scsi_block_requests(vhost->host);
846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
847 vhost->job_step = ibmvfc_npiv_logout;
848 wake_up(&vhost->work_wait_q);
849 } else
850 ibmvfc_hard_reset_host(vhost);
851}
852
853/**
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
856 **/
072b91f9
BK		 857static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
858{
859 unsigned long flags;
860
861 spin_lock_irqsave(vhost->host->host_lock, flags);
862 __ibmvfc_reset_host(vhost);
863 spin_unlock_irqrestore(vhost->host->host_lock, flags);
864}
865
866/**
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
869 *
7d0e4622
BK		 870 * Returns: 1 if init will be retried / 0 if not
871 *
072b91f9 872 **/
7d0e4622 873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
072b91f9 874{
7d0e4622
BK		 875 int retry = 0;
876
072b91f9 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82
BK		 878 vhost->delay_init = 1;
879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 880 dev_err(vhost->dev,
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1c41fa82 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
072b91f9 884 __ibmvfc_reset_host(vhost);
7d0e4622 885 else {
072b91f9 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
7d0e4622
BK		 887 retry = 1;
888 }
072b91f9
BK		 889 }
890
891 wake_up(&vhost->work_wait_q);
7d0e4622 892 return retry;
072b91f9
BK		 893}
894
895/**
b3c10489 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 897 * @starget: scsi target struct
898 *
899 * Return value:
900 * ibmvfc_target struct / NULL if not found
901 **/
b3c10489 902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 903{
904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
905 struct ibmvfc_host *vhost = shost_priv(shost);
906 struct ibmvfc_target *tgt;
907
908 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 909 if (tgt->target_id == starget->id) {
910 kref_get(&tgt->kref);
072b91f9 911 return tgt;
b3c10489 912 }
072b91f9
BK		 913 return NULL;
914}
915
916/**
b3c10489 917 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 918 * @starget: scsi target struct
919 *
920 * Return value:
921 * ibmvfc_target struct / NULL if not found
922 **/
b3c10489 923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 924{
925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
926 struct ibmvfc_target *tgt;
927 unsigned long flags;
928
929 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 930 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 931 spin_unlock_irqrestore(shost->host_lock, flags);
932 return tgt;
933}
934
935/**
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
938 *
939 * Return value:
940 * none
941 **/
942static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
943{
944 struct ibmvfc_host *vhost = shost_priv(shost);
945 unsigned long flags;
946
947 spin_lock_irqsave(shost->host_lock, flags);
948 if (vhost->state == IBMVFC_ACTIVE) {
949 switch (vhost->login_buf->resp.link_speed / 100) {
950 case 1:
951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
952 break;
953 case 2:
954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
955 break;
956 case 4:
957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
958 break;
959 case 8:
960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
961 break;
962 case 10:
963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
964 break;
965 case 16:
966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
967 break;
968 default:
775a42ec 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
072b91f9
BK		 970 vhost->login_buf->resp.link_speed / 100);
971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
972 break;
973 }
974 } else
975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
976 spin_unlock_irqrestore(shost->host_lock, flags);
977}
978
979/**
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
982 *
983 * Return value:
984 * none
985 **/
986static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
987{
988 struct ibmvfc_host *vhost = shost_priv(shost);
989 unsigned long flags;
990
991 spin_lock_irqsave(shost->host_lock, flags);
992 switch (vhost->state) {
993 case IBMVFC_INITIALIZING:
994 case IBMVFC_ACTIVE:
995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
996 break;
997 case IBMVFC_LINK_DOWN:
998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
999 break;
1000 case IBMVFC_LINK_DEAD:
1001 case IBMVFC_HOST_OFFLINE:
1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1003 break;
1004 case IBMVFC_HALTED:
1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1006 break;
0ae808e0
BK		 1007 case IBMVFC_NO_CRQ:
1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1009 break;
072b91f9
BK		 1010 default:
1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1013 break;
1014 }
1015 spin_unlock_irqrestore(shost->host_lock, flags);
1016}
1017
1018/**
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1022 *
1023 * Return value:
1024 * none
1025 **/
1026static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1027{
1028 if (timeout)
1029 rport->dev_loss_tmo = timeout;
1030 else
1031 rport->dev_loss_tmo = 1;
1032}
1033
b3c10489
BK		 1034/**
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1037 *
1038 **/
1039static void ibmvfc_release_tgt(struct kref *kref)
1040{
1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1042 kfree(tgt);
1043}
1044
072b91f9
BK		 1045/**
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1048 *
1049 * Return value:
1050 * none
1051 **/
1052static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1053{
b3c10489 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1056 if (tgt)
1057 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1058}
1059
1060/**
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1063 *
1064 * Return value:
1065 * none
1066 **/
1067static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1068{
b3c10489 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1071 if (tgt)
1072 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1073}
1074
1075/**
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1078 *
1079 * Return value:
1080 * none
1081 **/
1082static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1083{
b3c10489 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1086 if (tgt)
1087 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1088}
1089
1090/**
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1093 *
1094 * Return value:
1095 * 0 on success / other on failure
1096 **/
1097static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1098{
1099 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1100 ((vhost->state == IBMVFC_ACTIVE ||
1101 vhost->state == IBMVFC_HOST_OFFLINE ||
1102 vhost->state == IBMVFC_LINK_DEAD) &&
1103 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1104 (init_timeout * HZ));
1105
1106 return timeout ? 0 : -EIO;
1107}
1108
1109/**
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1112 *
1113 * Return value:
1114 * 0 on success / other on failure
1115 **/
1116static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1117{
1118 struct ibmvfc_host *vhost = shost_priv(shost);
1119
1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost);
1122 return ibmvfc_wait_while_resetting(vhost);
1123}
1124
1125/**
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1127 *
1128 * Return value:
1129 * none
1130 **/
1131static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1132{
1133 struct device_node *rootdn;
1134 const char *name;
1135 const unsigned int *num;
1136
1137 rootdn = of_find_node_by_path("/");
1138 if (!rootdn)
1139 return;
1140
1141 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1142 if (name)
1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1144 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1145 if (num)
1146 vhost->partition_number = *num;
1147 of_node_put(rootdn);
1148}
1149
1150/**
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1153 *
1154 * Return value:
1155 * none
1156 **/
1157static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1158{
1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1160 struct device_node *of_node = vhost->dev->archdata.of_node;
1161 const char *location;
1162
1163 memset(login_info, 0, sizeof(*login_info));
1164
1165 login_info->ostype = IBMVFC_OS_LINUX;
1166 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1167 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1168 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1169 login_info->partition_num = vhost->partition_number;
1170 login_info->vfc_frame_version = 1;
1171 login_info->fcp_version = 3;
497f9c50 1172 login_info->flags = IBMVFC_FLUSH_ON_HALT;
072b91f9 1173 if (vhost->client_migrated)
497f9c50 1174 login_info->flags |= IBMVFC_CLIENT_MIGRATED;
072b91f9
BK		 1175
1176 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1177 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1178 login_info->async.va = vhost->async_crq.msg_token;
52d7e861 1179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
072b91f9
BK		 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1181 strncpy(login_info->device_name,
71610f55 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
072b91f9
BK		 1183
1184 location = of_get_property(of_node, "ibm,loc-code", NULL);
71610f55 1185 location = location ? location : dev_name(vhost->dev);
072b91f9
BK		 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1187}
1188
1189/**
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1192 *
1193 * Returns zero on success.
1194 **/
1195static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1196{
1197 int i;
1198 struct ibmvfc_event_pool *pool = &vhost->pool;
1199
1200 ENTER;
1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1203 if (!pool->events)
1204 return -ENOMEM;
1205
1206 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1207 pool->size * sizeof(*pool->iu_storage),
1208 &pool->iu_token, 0);
1209
1210 if (!pool->iu_storage) {
1211 kfree(pool->events);
1212 return -ENOMEM;
1213 }
1214
1215 for (i = 0; i < pool->size; ++i) {
1216 struct ibmvfc_event *evt = &pool->events[i];
1217 atomic_set(&evt->free, 1);
1218 evt->crq.valid = 0x80;
1219 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1220 evt->xfer_iu = pool->iu_storage + i;
1221 evt->vhost = vhost;
1222 evt->ext_list = NULL;
1223 list_add_tail(&evt->queue, &vhost->free);
1224 }
1225
1226 LEAVE;
1227 return 0;
1228}
1229
1230/**
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1233 *
1234 **/
1235static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1236{
1237 int i;
1238 struct ibmvfc_event_pool *pool = &vhost->pool;
1239
1240 ENTER;
1241 for (i = 0; i < pool->size; ++i) {
1242 list_del(&pool->events[i].queue);
1243 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1244 if (pool->events[i].ext_list)
1245 dma_pool_free(vhost->sg_pool,
1246 pool->events[i].ext_list,
1247 pool->events[i].ext_list_token);
1248 }
1249
1250 kfree(pool->events);
1251 dma_free_coherent(vhost->dev,
1252 pool->size * sizeof(*pool->iu_storage),
1253 pool->iu_storage, pool->iu_token);
1254 LEAVE;
1255}
1256
1257/**
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1260 *
1261 * Returns a free event from the pool.
1262 **/
1263static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1264{
1265 struct ibmvfc_event *evt;
1266
1267 BUG_ON(list_empty(&vhost->free));
1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1269 atomic_set(&evt->free, 0);
1270 list_del(&evt->queue);
1271 return evt;
1272}
1273
1274/**
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1276 * required.
1277 * @evt: The event
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1280 **/
1281static void ibmvfc_init_event(struct ibmvfc_event *evt,
1282 void (*done) (struct ibmvfc_event *), u8 format)
1283{
1284 evt->cmnd = NULL;
1285 evt->sync_iu = NULL;
1286 evt->crq.format = format;
1287 evt->done = done;
ad8dcffa 1288 evt->eh_comp = NULL;
072b91f9
BK		 1289}
1290
1291/**
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1296 **/
1297static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1298 struct srp_direct_buf *md)
1299{
1300 int i;
1301 struct scatterlist *sg;
1302
1303 scsi_for_each_sg(scmd, sg, nseg, i) {
1304 md[i].va = sg_dma_address(sg);
1305 md[i].len = sg_dma_len(sg);
1306 md[i].key = 0;
1307 }
1308}
1309
1310/**
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1312 * @scmd: Scsi_Cmnd with the scatterlist
1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1316 *
1317 * Returns:
1318 * 0 on success / non-zero on failure
1319 **/
1320static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1321 struct ibmvfc_event *evt,
1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1323{
1324
1325 int sg_mapped;
1326 struct srp_direct_buf *data = &vfc_cmd->ioba;
1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1328
1329 sg_mapped = scsi_dma_map(scmd);
1330 if (!sg_mapped) {
1331 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1332 return 0;
1333 } else if (unlikely(sg_mapped < 0)) {
1334 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1335 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1336 return sg_mapped;
1337 }
1338
1339 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1340 vfc_cmd->flags |= IBMVFC_WRITE;
1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1342 } else {
1343 vfc_cmd->flags |= IBMVFC_READ;
1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1345 }
1346
1347 if (sg_mapped == 1) {
1348 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1349 return 0;
1350 }
1351
1352 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1353
1354 if (!evt->ext_list) {
1355 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1356 &evt->ext_list_token);
1357
1358 if (!evt->ext_list) {
64b840dd
BK		 1359 scsi_dma_unmap(scmd);
1360 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1361 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
072b91f9
BK		 1362 return -ENOMEM;
1363 }
1364 }
1365
1366 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1367
1368 data->va = evt->ext_list_token;
1369 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1370 data->key = 0;
1371 return 0;
1372}
1373
1374/**
1375 * ibmvfc_timeout - Internal command timeout handler
1376 * @evt: struct ibmvfc_event that timed out
1377 *
1378 * Called when an internally generated command times out
1379 **/
1380static void ibmvfc_timeout(struct ibmvfc_event *evt)
1381{
1382 struct ibmvfc_host *vhost = evt->vhost;
1383 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1384 ibmvfc_reset_host(vhost);
1385}
1386
1387/**
1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1389 * @evt: event to be sent
1390 * @vhost: ibmvfc host struct
1391 * @timeout: timeout in seconds - 0 means do not time command
1392 *
1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1394 **/
1395static int ibmvfc_send_event(struct ibmvfc_event *evt,
1396 struct ibmvfc_host *vhost, unsigned long timeout)
1397{
1398 u64 *crq_as_u64 = (u64 *) &evt->crq;
1399 int rc;
1400
1401 /* Copy the IU into the transfer area */
1402 *evt->xfer_iu = evt->iu;
1403 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1404 evt->xfer_iu->cmd.tag = (u64)evt;
1405 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1406 evt->xfer_iu->mad_common.tag = (u64)evt;
1407 else
1408 BUG();
1409
1410 list_add_tail(&evt->queue, &vhost->sent);
1411 init_timer(&evt->timer);
1412
1413 if (timeout) {
1414 evt->timer.data = (unsigned long) evt;
1415 evt->timer.expires = jiffies + (timeout * HZ);
1416 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1417 add_timer(&evt->timer);
1418 }
1419
a528ab7a
BK		 1420 mb();
1421
072b91f9
BK		 1422 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1423 list_del(&evt->queue);
1424 del_timer(&evt->timer);
1425
1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1427 * Firmware will send a CRQ with a transport event (0xFF) to
1428 * tell this client what has happened to the transport. This
1429 * will be handled in ibmvfc_handle_crq()
1430 */
1431 if (rc == H_CLOSED) {
1432 if (printk_ratelimit())
1433 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1434 if (evt->cmnd)
1435 scsi_dma_unmap(evt->cmnd);
1436 ibmvfc_free_event(evt);
1437 return SCSI_MLQUEUE_HOST_BUSY;
1438 }
1439
1440 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1441 if (evt->cmnd) {
1442 evt->cmnd->result = DID_ERROR << 16;
1443 evt->done = ibmvfc_scsi_eh_done;
1444 } else
1445 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1446
1447 evt->done(evt);
1448 } else
1449 ibmvfc_trc_start(evt);
1450
1451 return 0;
1452}
1453
1454/**
1455 * ibmvfc_log_error - Log an error for the failed command if appropriate
1456 * @evt: ibmvfc event to log
1457 *
1458 **/
1459static void ibmvfc_log_error(struct ibmvfc_event *evt)
1460{
1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1462 struct ibmvfc_host *vhost = evt->vhost;
1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1464 struct scsi_cmnd *cmnd = evt->cmnd;
1465 const char *err = unknown_error;
1466 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1467 int logerr = 0;
1468 int rsp_code = 0;
1469
1470 if (index >= 0) {
1471 logerr = cmd_status[index].log;
1472 err = cmd_status[index].name;
1473 }
1474
0ae808e0 1475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1476 return;
1477
1478 if (rsp->flags & FCP_RSP_LEN_VALID)
1479 rsp_code = rsp->data.info.rsp_code;
1480
1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1485}
1486
1487/**
1488 * ibmvfc_scsi_done - Handle responses from commands
1489 * @evt: ibmvfc event to be handled
1490 *
1491 * Used as a callback when sending scsi cmds.
1492 **/
1493static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1494{
1495 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1496 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1497 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d
BK		 1498 u32 rsp_len = 0;
1499 u32 sense_len = rsp->fcp_sense_len;
072b91f9
BK		 1500
1501 if (cmnd) {
1502 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1503 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1504 else if (rsp->flags & FCP_RESID_UNDER)
1505 scsi_set_resid(cmnd, rsp->fcp_resid);
1506 else
1507 scsi_set_resid(cmnd, 0);
1508
1509 if (vfc_cmd->status) {
1510 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1511
1512 if (rsp->flags & FCP_RSP_LEN_VALID)
1513 rsp_len = rsp->fcp_rsp_len;
1514 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1515 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1516 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9 1517 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
646d3857
BK		 1518 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
1519 ibmvfc_reinit_host(evt->vhost);
072b91f9 1520
50119dad
BK		 1521 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1522 cmnd->result = (DID_ERROR << 16);
1523
072b91f9
BK		 1524 ibmvfc_log_error(evt);
1525 }
1526
1527 if (!cmnd->result &&
1528 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1529 cmnd->result = (DID_ERROR << 16);
1530
1531 scsi_dma_unmap(cmnd);
1532 cmnd->scsi_done(cmnd);
1533 }
1534
ad8dcffa
BK		 1535 if (evt->eh_comp)
1536 complete(evt->eh_comp);
1537
072b91f9
BK		 1538 ibmvfc_free_event(evt);
1539}
1540
1541/**
1542 * ibmvfc_host_chkready - Check if the host can accept commands
1543 * @vhost: struct ibmvfc host
1544 *
1545 * Returns:
1546 * 1 if host can accept command / 0 if not
1547 **/
1548static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1549{
1550 int result = 0;
1551
1552 switch (vhost->state) {
1553 case IBMVFC_LINK_DEAD:
1554 case IBMVFC_HOST_OFFLINE:
1555 result = DID_NO_CONNECT << 16;
1556 break;
1557 case IBMVFC_NO_CRQ:
1558 case IBMVFC_INITIALIZING:
1559 case IBMVFC_HALTED:
1560 case IBMVFC_LINK_DOWN:
1561 result = DID_REQUEUE << 16;
1562 break;
1563 case IBMVFC_ACTIVE:
1564 result = 0;
1565 break;
1566 };
1567
1568 return result;
1569}
1570
1571/**
1572 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1573 * @cmnd: struct scsi_cmnd to be executed
1574 * @done: Callback function to be called when cmnd is completed
1575 *
1576 * Returns:
1577 * 0 on success / other on failure
1578 **/
1579static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1580 void (*done) (struct scsi_cmnd *))
1581{
1582 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1583 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1584 struct ibmvfc_cmd *vfc_cmd;
1585 struct ibmvfc_event *evt;
1586 u8 tag[2];
1587 int rc;
1588
1589 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1590 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1591 cmnd->result = rc;
1592 done(cmnd);
1593 return 0;
1594 }
1595
1596 cmnd->result = (DID_OK << 16);
1597 evt = ibmvfc_get_event(vhost);
1598 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1599 evt->cmnd = cmnd;
1600 cmnd->scsi_done = done;
1601 vfc_cmd = &evt->iu.cmd;
1602 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1603 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1604 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1605 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1606 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1607 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1608 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1609 vfc_cmd->tgt_scsi_id = rport->port_id;
072b91f9
BK		 1610 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1611 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1612 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1613
1614 if (scsi_populate_tag_msg(cmnd, tag)) {
1615 vfc_cmd->task_tag = tag[1];
1616 switch (tag[0]) {
1617 case MSG_SIMPLE_TAG:
1618 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1619 break;
1620 case MSG_HEAD_TAG:
1621 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1622 break;
1623 case MSG_ORDERED_TAG:
1624 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1625 break;
1626 };
1627 }
1628
1629 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1630 return ibmvfc_send_event(evt, vhost, 0);
1631
1632 ibmvfc_free_event(evt);
1633 if (rc == -ENOMEM)
1634 return SCSI_MLQUEUE_HOST_BUSY;
1635
1636 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1637 scmd_printk(KERN_ERR, cmnd,
1638 "Failed to map DMA buffer for command. rc=%d\n", rc);
1639
1640 cmnd->result = DID_ERROR << 16;
1641 done(cmnd);
1642 return 0;
1643}
1644
1645/**
1646 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1647 * @evt: ibmvfc event struct
1648 *
1649 **/
1650static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1651{
1652 /* copy the response back */
1653 if (evt->sync_iu)
1654 *evt->sync_iu = *evt->xfer_iu;
1655
1656 complete(&evt->comp);
1657}
1658
1659/**
1660 * ibmvfc_reset_device - Reset the device with the specified reset type
1661 * @sdev: scsi device to reset
1662 * @type: reset type
1663 * @desc: reset type description for log messages
1664 *
1665 * Returns:
1666 * 0 on success / other on failure
1667 **/
1668static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1669{
1670 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1671 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1672 struct ibmvfc_cmd *tmf;
50ed9a00 1673 struct ibmvfc_event *evt = NULL;
072b91f9
BK		 1674 union ibmvfc_iu rsp_iu;
1675 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1676 int rsp_rc = -EBUSY;
1677 unsigned long flags;
1678 int rsp_code = 0;
1679
1680 spin_lock_irqsave(vhost->host->host_lock, flags);
1681 if (vhost->state == IBMVFC_ACTIVE) {
1682 evt = ibmvfc_get_event(vhost);
1683 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1684
1685 tmf = &evt->iu.cmd;
1686 memset(tmf, 0, sizeof(*tmf));
1687 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1688 tmf->resp.len = sizeof(tmf->rsp);
1689 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1690 tmf->payload_len = sizeof(tmf->iu);
1691 tmf->resp_len = sizeof(tmf->rsp);
1692 tmf->cancel_key = (unsigned long)sdev->hostdata;
1693 tmf->tgt_scsi_id = rport->port_id;
1694 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1695 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1696 tmf->iu.tmf_flags = type;
1697 evt->sync_iu = &rsp_iu;
1698
1699 init_completion(&evt->comp);
1700 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1701 }
1702 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1703
1704 if (rsp_rc != 0) {
1705 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1706 desc, rsp_rc);
1707 return -EIO;
1708 }
1709
1710 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1711 wait_for_completion(&evt->comp);
1712
1713 if (rsp_iu.cmd.status) {
1714 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1715 rsp_code = fc_rsp->data.info.rsp_code;
1716
1717 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1718 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1719 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1720 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1721 fc_rsp->scsi_status);
1722 rsp_rc = -EIO;
1723 } else
1724 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1725
1726 spin_lock_irqsave(vhost->host->host_lock, flags);
1727 ibmvfc_free_event(evt);
1728 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1729 return rsp_rc;
1730}
1731
1732/**
1733 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1734 * @sdev: scsi device to abort commands
1735 *
1736 * This sends an Abort Task Set to the VIOS for the specified device. This does
1737 * NOT send any cancel to the VIOS. That must be done separately.
1738 *
1739 * Returns:
1740 * 0 on success / other on failure
1741 **/
1742static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1743{
1744 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1745 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1746 struct ibmvfc_cmd *tmf;
1747 struct ibmvfc_event *evt, *found_evt;
1748 union ibmvfc_iu rsp_iu;
1749 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1750 int rsp_rc = -EBUSY;
1751 unsigned long flags;
1752 int rsp_code = 0;
1753
1754 spin_lock_irqsave(vhost->host->host_lock, flags);
1755 found_evt = NULL;
1756 list_for_each_entry(evt, &vhost->sent, queue) {
1757 if (evt->cmnd && evt->cmnd->device == sdev) {
1758 found_evt = evt;
1759 break;
1760 }
1761 }
1762
1763 if (!found_evt) {
1764 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1765 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1766 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1767 return 0;
1768 }
1769
1770 if (vhost->state == IBMVFC_ACTIVE) {
1771 evt = ibmvfc_get_event(vhost);
1772 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1773
1774 tmf = &evt->iu.cmd;
1775 memset(tmf, 0, sizeof(*tmf));
1776 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1777 tmf->resp.len = sizeof(tmf->rsp);
1778 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1779 tmf->payload_len = sizeof(tmf->iu);
1780 tmf->resp_len = sizeof(tmf->rsp);
1781 tmf->cancel_key = (unsigned long)sdev->hostdata;
1782 tmf->tgt_scsi_id = rport->port_id;
1783 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1784 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1785 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1786 evt->sync_iu = &rsp_iu;
1787
1788 init_completion(&evt->comp);
1789 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1790 }
1791
1792 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1793
1794 if (rsp_rc != 0) {
1795 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1796 return -EIO;
1797 }
1798
1799 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1800 wait_for_completion(&evt->comp);
1801
1802 if (rsp_iu.cmd.status) {
1803 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1804 rsp_code = fc_rsp->data.info.rsp_code;
1805
1806 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1807 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1808 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1809 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1810 fc_rsp->scsi_status);
1811 rsp_rc = -EIO;
1812 } else
1813 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1814
1815 spin_lock_irqsave(vhost->host->host_lock, flags);
1816 ibmvfc_free_event(evt);
1817 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1818 return rsp_rc;
1819}
1820
1821/**
1822 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1823 * @sdev: scsi device to cancel commands
1824 * @type: type of error recovery being performed
1825 *
1826 * This sends a cancel to the VIOS for the specified device. This does
1827 * NOT send any abort to the actual device. That must be done separately.
1828 *
1829 * Returns:
1830 * 0 on success / other on failure
1831 **/
1832static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1833{
1834 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 1835 struct scsi_target *starget = scsi_target(sdev);
1836 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 1837 struct ibmvfc_tmf *tmf;
1838 struct ibmvfc_event *evt, *found_evt;
1839 union ibmvfc_iu rsp;
1840 int rsp_rc = -EBUSY;
1841 unsigned long flags;
1842 u16 status;
1843
1844 ENTER;
1845 spin_lock_irqsave(vhost->host->host_lock, flags);
1846 found_evt = NULL;
1847 list_for_each_entry(evt, &vhost->sent, queue) {
1848 if (evt->cmnd && evt->cmnd->device == sdev) {
1849 found_evt = evt;
1850 break;
1851 }
1852 }
1853
1854 if (!found_evt) {
1855 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1856 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1857 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1858 return 0;
1859 }
1860
1861 if (vhost->state == IBMVFC_ACTIVE) {
1862 evt = ibmvfc_get_event(vhost);
1863 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1864
1865 tmf = &evt->iu.tmf;
1866 memset(tmf, 0, sizeof(*tmf));
1867 tmf->common.version = 1;
1868 tmf->common.opcode = IBMVFC_TMF_MAD;
1869 tmf->common.length = sizeof(*tmf);
1870 tmf->scsi_id = rport->port_id;
1871 int_to_scsilun(sdev->lun, &tmf->lun);
1872 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1873 tmf->cancel_key = (unsigned long)sdev->hostdata;
ad8dcffa 1874 tmf->my_cancel_key = (unsigned long)starget->hostdata;
072b91f9
BK		 1875
1876 evt->sync_iu = &rsp;
1877 init_completion(&evt->comp);
1878 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1879 }
1880
1881 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1882
1883 if (rsp_rc != 0) {
1884 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1885 return -EIO;
1886 }
1887
1888 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1889
1890 wait_for_completion(&evt->comp);
1891 status = rsp.mad_common.status;
1892 spin_lock_irqsave(vhost->host->host_lock, flags);
1893 ibmvfc_free_event(evt);
1894 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1895
1896 if (status != IBMVFC_MAD_SUCCESS) {
1897 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1898 return -EIO;
1899 }
1900
1901 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1902 return 0;
1903}
1904
ad8dcffa
BK		 1905/**
1906 * ibmvfc_match_target - Match function for specified target
1907 * @evt: ibmvfc event struct
1908 * @device: device to match (starget)
1909 *
1910 * Returns:
1911 * 1 if event matches starget / 0 if event does not match starget
1912 **/
1913static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
1914{
1915 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
1916 return 1;
1917 return 0;
1918}
1919
1920/**
1921 * ibmvfc_match_lun - Match function for specified LUN
1922 * @evt: ibmvfc event struct
1923 * @device: device to match (sdev)
1924 *
1925 * Returns:
1926 * 1 if event matches sdev / 0 if event does not match sdev
1927 **/
1928static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
1929{
1930 if (evt->cmnd && evt->cmnd->device == device)
1931 return 1;
1932 return 0;
1933}
1934
1935/**
1936 * ibmvfc_wait_for_ops - Wait for ops to complete
1937 * @vhost: ibmvfc host struct
1938 * @device: device to match (starget or sdev)
1939 * @match: match function
1940 *
1941 * Returns:
1942 * SUCCESS / FAILED
1943 **/
1944static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
1945 int (*match) (struct ibmvfc_event *, void *))
1946{
1947 struct ibmvfc_event *evt;
1948 DECLARE_COMPLETION_ONSTACK(comp);
1949 int wait;
1950 unsigned long flags;
1951 signed long timeout = init_timeout * HZ;
1952
1953 ENTER;
1954 do {
1955 wait = 0;
1956 spin_lock_irqsave(vhost->host->host_lock, flags);
1957 list_for_each_entry(evt, &vhost->sent, queue) {
1958 if (match(evt, device)) {
1959 evt->eh_comp = &comp;
1960 wait++;
1961 }
1962 }
1963 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1964
1965 if (wait) {
1966 timeout = wait_for_completion_timeout(&comp, timeout);
1967
1968 if (!timeout) {
1969 wait = 0;
1970 spin_lock_irqsave(vhost->host->host_lock, flags);
1971 list_for_each_entry(evt, &vhost->sent, queue) {
1972 if (match(evt, device)) {
1973 evt->eh_comp = NULL;
1974 wait++;
1975 }
1976 }
1977 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1978 if (wait)
1979 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
1980 LEAVE;
1981 return wait ? FAILED : SUCCESS;
1982 }
1983 }
1984 } while (wait);
1985
1986 LEAVE;
1987 return SUCCESS;
1988}
1989
072b91f9
BK		 1990/**
1991 * ibmvfc_eh_abort_handler - Abort a command
1992 * @cmd: scsi command to abort
1993 *
1994 * Returns:
1995 * SUCCESS / FAILED
1996 **/
1997static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
1998{
ad8dcffa
BK		 1999 struct scsi_device *sdev = cmd->device;
2000 struct ibmvfc_host *vhost = shost_priv(sdev->host);
072b91f9 2001 int cancel_rc, abort_rc;
ad8dcffa 2002 int rc = FAILED;
072b91f9
BK		 2003
2004 ENTER;
2005 ibmvfc_wait_while_resetting(vhost);
ad8dcffa
BK		 2006 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2007 abort_rc = ibmvfc_abort_task_set(sdev);
072b91f9 2008
ad8dcffa
BK		 2009 if (!cancel_rc && !abort_rc)
2010 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9
BK		 2011
2012 LEAVE;
ad8dcffa 2013 return rc;
072b91f9
BK		 2014}
2015
2016/**
2017 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2018 * @cmd: scsi command struct
2019 *
2020 * Returns:
2021 * SUCCESS / FAILED
2022 **/
2023static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2024{
ad8dcffa
BK		 2025 struct scsi_device *sdev = cmd->device;
2026 struct ibmvfc_host *vhost = shost_priv(sdev->host);
072b91f9 2027 int cancel_rc, reset_rc;
ad8dcffa 2028 int rc = FAILED;
072b91f9
BK		 2029
2030 ENTER;
2031 ibmvfc_wait_while_resetting(vhost);
ad8dcffa
BK		 2032 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2033 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
072b91f9 2034
ad8dcffa
BK		 2035 if (!cancel_rc && !reset_rc)
2036 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9
BK		 2037
2038 LEAVE;
ad8dcffa 2039 return rc;
072b91f9
BK		 2040}
2041
2042/**
2043 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2044 * @sdev: scsi device struct
2045 * @data: return code
2046 *
2047 **/
2048static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
2049{
2050 unsigned long *rc = data;
2051 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2052}
2053
2054/**
2055 * ibmvfc_dev_abort_all - Device iterated abort task set function
2056 * @sdev: scsi device struct
2057 * @data: return code
2058 *
2059 **/
2060static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2061{
2062 unsigned long *rc = data;
2063 *rc |= ibmvfc_abort_task_set(sdev);
2064}
2065
2066/**
2067 * ibmvfc_eh_target_reset_handler - Reset the target
2068 * @cmd: scsi command struct
2069 *
2070 * Returns:
2071 * SUCCESS / FAILED
2072 **/
2073static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2074{
ad8dcffa
BK		 2075 struct scsi_device *sdev = cmd->device;
2076 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2077 struct scsi_target *starget = scsi_target(sdev);
072b91f9 2078 int reset_rc;
ad8dcffa 2079 int rc = FAILED;
072b91f9 2080 unsigned long cancel_rc = 0;
072b91f9
BK		 2081
2082 ENTER;
2083 ibmvfc_wait_while_resetting(vhost);
2084 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
ad8dcffa 2085 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
072b91f9 2086
ad8dcffa
BK		 2087 if (!cancel_rc && !reset_rc)
2088 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9
BK		 2089
2090 LEAVE;
ad8dcffa 2091 return rc;
072b91f9
BK		 2092}
2093
2094/**
2095 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2096 * @cmd: struct scsi_cmnd having problems
2097 *
2098 **/
2099static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2100{
2101 int rc;
2102 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2103
2104 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2105 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2106 return rc ? FAILED : SUCCESS;
2107}
2108
2109/**
2110 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2111 * @rport: rport struct
2112 *
2113 * Return value:
2114 * none
2115 **/
2116static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2117{
2118 struct scsi_target *starget = to_scsi_target(&rport->dev);
2119 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2120 struct ibmvfc_host *vhost = shost_priv(shost);
072b91f9
BK		 2121 unsigned long cancel_rc = 0;
2122 unsigned long abort_rc = 0;
ad8dcffa 2123 int rc = FAILED;
072b91f9
BK		 2124
2125 ENTER;
2126 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2127 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2128
ad8dcffa
BK		 2129 if (!cancel_rc && !abort_rc)
2130 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2131
2132 if (rc == FAILED)
072b91f9 2133 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2134 LEAVE;
2135}
2136
2137static const struct {
2138 enum ibmvfc_async_event ae;
2139 const char *desc;
2140} ae_desc [] = {
2141 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2142 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2143 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2144 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2145 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2146 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2147 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2148 { IBMVFC_AE_LINK_UP, "Link Up" },
2149 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2150 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2151 { IBMVFC_AE_HALT, "Halt" },
2152 { IBMVFC_AE_RESUME, "Resume" },
2153 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2154};
2155
2156static const char *unknown_ae = "Unknown async";
2157
2158/**
2159 * ibmvfc_get_ae_desc - Get text description for async event
2160 * @ae: async event
2161 *
2162 **/
2163static const char *ibmvfc_get_ae_desc(u64 ae)
2164{
2165 int i;
2166
2167 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2168 if (ae_desc[i].ae == ae)
2169 return ae_desc[i].desc;
2170
2171 return unknown_ae;
2172}
2173
2174/**
2175 * ibmvfc_handle_async - Handle an async event from the adapter
2176 * @crq: crq to process
2177 * @vhost: ibmvfc host struct
2178 *
2179 **/
2180static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2181 struct ibmvfc_host *vhost)
2182{
2183 const char *desc = ibmvfc_get_ae_desc(crq->event);
2184
775a42ec
SR		 2185 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2186 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
072b91f9
BK		 2187
2188 switch (crq->event) {
072b91f9 2189 case IBMVFC_AE_RESUME:
497f9c50
BK		 2190 switch (crq->link_state) {
2191 case IBMVFC_AE_LS_LINK_DOWN:
2192 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2193 break;
2194 case IBMVFC_AE_LS_LINK_DEAD:
2195 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2196 break;
2197 case IBMVFC_AE_LS_LINK_UP:
2198 case IBMVFC_AE_LS_LINK_BOUNCED:
2199 default:
2200 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2201 vhost->delay_init = 1;
2202 __ibmvfc_reset_host(vhost);
2203 break;
2204 };
2205
2206 break;
2207 case IBMVFC_AE_LINK_UP:
072b91f9 2208 vhost->events_to_log |= IBMVFC_AE_LINKUP;
d2131b33
BK		 2209 vhost->delay_init = 1;
2210 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2211 break;
2212 case IBMVFC_AE_SCN_FABRIC:
d2131b33 2213 case IBMVFC_AE_SCN_DOMAIN:
072b91f9 2214 vhost->events_to_log |= IBMVFC_AE_RSCN;
d2131b33
BK		 2215 vhost->delay_init = 1;
2216 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2217 break;
2218 case IBMVFC_AE_SCN_NPORT:
2219 case IBMVFC_AE_SCN_GROUP:
072b91f9
BK		 2220 vhost->events_to_log |= IBMVFC_AE_RSCN;
2221 case IBMVFC_AE_ELS_LOGO:
2222 case IBMVFC_AE_ELS_PRLO:
2223 case IBMVFC_AE_ELS_PLOGI:
2224 ibmvfc_reinit_host(vhost);
2225 break;
2226 case IBMVFC_AE_LINK_DOWN:
2227 case IBMVFC_AE_ADAPTER_FAILED:
2228 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2229 break;
2230 case IBMVFC_AE_LINK_DEAD:
2231 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2232 break;
2233 case IBMVFC_AE_HALT:
2234 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2235 break;
2236 default:
775a42ec 2237 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
072b91f9
BK		 2238 break;
2239 };
2240}
2241
2242/**
2243 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2244 * @crq: Command/Response queue
2245 * @vhost: ibmvfc host struct
2246 *
2247 **/
2248static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2249{
2250 long rc;
2251 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2252
2253 switch (crq->valid) {
2254 case IBMVFC_CRQ_INIT_RSP:
2255 switch (crq->format) {
2256 case IBMVFC_CRQ_INIT:
2257 dev_info(vhost->dev, "Partner initialized\n");
2258 /* Send back a response */
2259 rc = ibmvfc_send_crq_init_complete(vhost);
2260 if (rc == 0)
cf6f10d7 2261 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2262 else
2263 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2264 break;
2265 case IBMVFC_CRQ_INIT_COMPLETE:
2266 dev_info(vhost->dev, "Partner initialization complete\n");
cf6f10d7 2267 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2268 break;
2269 default:
2270 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2271 }
2272 return;
2273 case IBMVFC_CRQ_XPORT_EVENT:
2274 vhost->state = IBMVFC_NO_CRQ;
79111d08 2275 vhost->logged_in = 0;
072b91f9
BK		 2276 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2277 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2278 /* We need to re-setup the interpartition connection */
2279 dev_info(vhost->dev, "Re-enabling adapter\n");
2280 vhost->client_migrated = 1;
2281 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2282 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2283 (rc = ibmvfc_send_crq_init(vhost))) {
2284 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2285 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2286 } else
2287 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2288 } else {
2289 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2290
2291 ibmvfc_purge_requests(vhost, DID_ERROR);
2292 if ((rc = ibmvfc_reset_crq(vhost)) ||
2293 (rc = ibmvfc_send_crq_init(vhost))) {
2294 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2295 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2296 } else
2297 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2298 }
2299 return;
2300 case IBMVFC_CRQ_CMD_RSP:
2301 break;
2302 default:
2303 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2304 return;
2305 }
2306
2307 if (crq->format == IBMVFC_ASYNC_EVENT)
2308 return;
2309
2310 /* The only kind of payload CRQs we should get are responses to
2311 * things we send. Make sure this response is to something we
2312 * actually sent
2313 */
2314 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
775a42ec 2315 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
072b91f9
BK		 2316 crq->ioba);
2317 return;
2318 }
2319
2320 if (unlikely(atomic_read(&evt->free))) {
775a42ec 2321 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
072b91f9
BK		 2322 crq->ioba);
2323 return;
2324 }
2325
2326 del_timer(&evt->timer);
2327 list_del(&evt->queue);
2328 ibmvfc_trc_end(evt);
2329 evt->done(evt);
2330}
2331
2332/**
2333 * ibmvfc_scan_finished - Check if the device scan is done.
2334 * @shost: scsi host struct
2335 * @time: current elapsed time
2336 *
2337 * Returns:
2338 * 0 if scan is not done / 1 if scan is done
2339 **/
2340static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2341{
2342 unsigned long flags;
2343 struct ibmvfc_host *vhost = shost_priv(shost);
2344 int done = 0;
2345
2346 spin_lock_irqsave(shost->host_lock, flags);
2347 if (time >= (init_timeout * HZ)) {
2348 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2349 "continuing initialization\n", init_timeout);
2350 done = 1;
2351 }
2352
43c8da90 2353 if (vhost->scan_complete)
072b91f9
BK		 2354 done = 1;
2355 spin_unlock_irqrestore(shost->host_lock, flags);
2356 return done;
2357}
2358
2359/**
2360 * ibmvfc_slave_alloc - Setup the device's task set value
2361 * @sdev: struct scsi_device device to configure
2362 *
2363 * Set the device's task set value so that error handling works as
2364 * expected.
2365 *
2366 * Returns:
2367 * 0 on success / -ENXIO if device does not exist
2368 **/
2369static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2370{
2371 struct Scsi_Host *shost = sdev->host;
2372 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2373 struct ibmvfc_host *vhost = shost_priv(shost);
2374 unsigned long flags = 0;
2375
2376 if (!rport || fc_remote_port_chkready(rport))
2377 return -ENXIO;
2378
2379 spin_lock_irqsave(shost->host_lock, flags);
2380 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2381 spin_unlock_irqrestore(shost->host_lock, flags);
2382 return 0;
2383}
2384
ad8dcffa
BK		 2385/**
2386 * ibmvfc_target_alloc - Setup the target's task set value
2387 * @starget: struct scsi_target
2388 *
2389 * Set the target's task set value so that error handling works as
2390 * expected.
2391 *
2392 * Returns:
2393 * 0 on success / -ENXIO if device does not exist
2394 **/
2395static int ibmvfc_target_alloc(struct scsi_target *starget)
2396{
2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2398 struct ibmvfc_host *vhost = shost_priv(shost);
2399 unsigned long flags = 0;
2400
2401 spin_lock_irqsave(shost->host_lock, flags);
2402 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2403 spin_unlock_irqrestore(shost->host_lock, flags);
2404 return 0;
2405}
2406
072b91f9
BK		 2407/**
2408 * ibmvfc_slave_configure - Configure the device
2409 * @sdev: struct scsi_device device to configure
2410 *
2411 * Enable allow_restart for a device if it is a disk. Adjust the
2412 * queue_depth here also.
2413 *
2414 * Returns:
2415 * 0
2416 **/
2417static int ibmvfc_slave_configure(struct scsi_device *sdev)
2418{
2419 struct Scsi_Host *shost = sdev->host;
2420 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2421 unsigned long flags = 0;
2422
2423 spin_lock_irqsave(shost->host_lock, flags);
2424 if (sdev->type == TYPE_DISK)
2425 sdev->allow_restart = 1;
2426
2427 if (sdev->tagged_supported) {
2428 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2429 scsi_activate_tcq(sdev, sdev->queue_depth);
2430 } else
2431 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2432
2433 rport->dev_loss_tmo = dev_loss_tmo;
2434 spin_unlock_irqrestore(shost->host_lock, flags);
2435 return 0;
2436}
2437
2438/**
2439 * ibmvfc_change_queue_depth - Change the device's queue depth
2440 * @sdev: scsi device struct
2441 * @qdepth: depth to set
2442 *
2443 * Return value:
2444 * actual depth set
2445 **/
2446static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2447{
2448 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2449 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2450
2451 scsi_adjust_queue_depth(sdev, 0, qdepth);
2452 return sdev->queue_depth;
2453}
2454
2455/**
2456 * ibmvfc_change_queue_type - Change the device's queue type
2457 * @sdev: scsi device struct
2458 * @tag_type: type of tags to use
2459 *
2460 * Return value:
2461 * actual queue type set
2462 **/
2463static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2464{
2465 if (sdev->tagged_supported) {
2466 scsi_set_tag_type(sdev, tag_type);
2467
2468 if (tag_type)
2469 scsi_activate_tcq(sdev, sdev->queue_depth);
2470 else
2471 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2472 } else
2473 tag_type = 0;
2474
2475 return tag_type;
2476}
2477
2478static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2479 struct device_attribute *attr, char *buf)
2480{
2481 struct Scsi_Host *shost = class_to_shost(dev);
2482 struct ibmvfc_host *vhost = shost_priv(shost);
2483
2484 return snprintf(buf, PAGE_SIZE, "%s\n",
2485 vhost->login_buf->resp.partition_name);
2486}
2487
072b91f9
BK		 2488static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2489 struct device_attribute *attr, char *buf)
2490{
2491 struct Scsi_Host *shost = class_to_shost(dev);
2492 struct ibmvfc_host *vhost = shost_priv(shost);
2493
2494 return snprintf(buf, PAGE_SIZE, "%s\n",
2495 vhost->login_buf->resp.device_name);
2496}
2497
072b91f9
BK		 2498static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2499 struct device_attribute *attr, char *buf)
2500{
2501 struct Scsi_Host *shost = class_to_shost(dev);
2502 struct ibmvfc_host *vhost = shost_priv(shost);
2503
2504 return snprintf(buf, PAGE_SIZE, "%s\n",
2505 vhost->login_buf->resp.port_loc_code);
2506}
2507
072b91f9
BK		 2508static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2509 struct device_attribute *attr, char *buf)
2510{
2511 struct Scsi_Host *shost = class_to_shost(dev);
2512 struct ibmvfc_host *vhost = shost_priv(shost);
2513
2514 return snprintf(buf, PAGE_SIZE, "%s\n",
2515 vhost->login_buf->resp.drc_name);
2516}
2517
072b91f9
BK		 2518static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2519 struct device_attribute *attr, char *buf)
2520{
2521 struct Scsi_Host *shost = class_to_shost(dev);
2522 struct ibmvfc_host *vhost = shost_priv(shost);
2523 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2524}
2525
497f9c50
BK		 2526static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2527 struct device_attribute *attr, char *buf)
2528{
2529 struct Scsi_Host *shost = class_to_shost(dev);
2530 struct ibmvfc_host *vhost = shost_priv(shost);
2531 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2532}
2533
072b91f9
BK		 2534/**
2535 * ibmvfc_show_log_level - Show the adapter's error logging level
2536 * @dev: class device struct
2537 * @buf: buffer
2538 *
2539 * Return value:
2540 * number of bytes printed to buffer
2541 **/
2542static ssize_t ibmvfc_show_log_level(struct device *dev,
2543 struct device_attribute *attr, char *buf)
2544{
2545 struct Scsi_Host *shost = class_to_shost(dev);
2546 struct ibmvfc_host *vhost = shost_priv(shost);
2547 unsigned long flags = 0;
2548 int len;
2549
2550 spin_lock_irqsave(shost->host_lock, flags);
2551 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2552 spin_unlock_irqrestore(shost->host_lock, flags);
2553 return len;
2554}
2555
2556/**
2557 * ibmvfc_store_log_level - Change the adapter's error logging level
2558 * @dev: class device struct
2559 * @buf: buffer
2560 *
2561 * Return value:
2562 * number of bytes printed to buffer
2563 **/
2564static ssize_t ibmvfc_store_log_level(struct device *dev,
2565 struct device_attribute *attr,
2566 const char *buf, size_t count)
2567{
2568 struct Scsi_Host *shost = class_to_shost(dev);
2569 struct ibmvfc_host *vhost = shost_priv(shost);
2570 unsigned long flags = 0;
2571
2572 spin_lock_irqsave(shost->host_lock, flags);
2573 vhost->log_level = simple_strtoul(buf, NULL, 10);
2574 spin_unlock_irqrestore(shost->host_lock, flags);
2575 return strlen(buf);
2576}
2577
85e2399e
BK		 2578static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
2579static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
2580static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
2581static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
2582static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
497f9c50 2583static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
85e2399e
BK		 2584static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
2585 ibmvfc_show_log_level, ibmvfc_store_log_level);
072b91f9
BK		 2586
2587#ifdef CONFIG_SCSI_IBMVFC_TRACE
2588/**
2589 * ibmvfc_read_trace - Dump the adapter trace
2590 * @kobj: kobject struct
2591 * @bin_attr: bin_attribute struct
2592 * @buf: buffer
2593 * @off: offset
2594 * @count: buffer size
2595 *
2596 * Return value:
2597 * number of bytes printed to buffer
2598 **/
2599static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2600 struct bin_attribute *bin_attr,
2601 char *buf, loff_t off, size_t count)
2602{
2603 struct device *dev = container_of(kobj, struct device, kobj);
2604 struct Scsi_Host *shost = class_to_shost(dev);
2605 struct ibmvfc_host *vhost = shost_priv(shost);
2606 unsigned long flags = 0;
2607 int size = IBMVFC_TRACE_SIZE;
2608 char *src = (char *)vhost->trace;
2609
2610 if (off > size)
2611 return 0;
2612 if (off + count > size) {
2613 size -= off;
2614 count = size;
2615 }
2616
2617 spin_lock_irqsave(shost->host_lock, flags);
2618 memcpy(buf, &src[off], count);
2619 spin_unlock_irqrestore(shost->host_lock, flags);
2620 return count;
2621}
2622
2623static struct bin_attribute ibmvfc_trace_attr = {
2624 .attr = {
2625 .name = "trace",
2626 .mode = S_IRUGO,
2627 },
2628 .size = 0,
2629 .read = ibmvfc_read_trace,
2630};
2631#endif
2632
2633static struct device_attribute *ibmvfc_attrs[] = {
85e2399e
BK		 2634 &dev_attr_partition_name,
2635 &dev_attr_device_name,
2636 &dev_attr_port_loc_code,
2637 &dev_attr_drc_name,
2638 &dev_attr_npiv_version,
497f9c50 2639 &dev_attr_capabilities,
85e2399e 2640 &dev_attr_log_level,
072b91f9
BK		 2641 NULL
2642};
2643
2644static struct scsi_host_template driver_template = {
2645 .module = THIS_MODULE,
2646 .name = "IBM POWER Virtual FC Adapter",
2647 .proc_name = IBMVFC_NAME,
2648 .queuecommand = ibmvfc_queuecommand,
2649 .eh_abort_handler = ibmvfc_eh_abort_handler,
2650 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2651 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2652 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2653 .slave_alloc = ibmvfc_slave_alloc,
2654 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 2655 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 2656 .scan_finished = ibmvfc_scan_finished,
2657 .change_queue_depth = ibmvfc_change_queue_depth,
2658 .change_queue_type = ibmvfc_change_queue_type,
2659 .cmd_per_lun = 16,
2660 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2661 .this_id = -1,
2662 .sg_tablesize = SG_ALL,
2663 .max_sectors = IBMVFC_MAX_SECTORS,
2664 .use_clustering = ENABLE_CLUSTERING,
2665 .shost_attrs = ibmvfc_attrs,
2666};
2667
2668/**
2669 * ibmvfc_next_async_crq - Returns the next entry in async queue
2670 * @vhost: ibmvfc host struct
2671 *
2672 * Returns:
2673 * Pointer to next entry in queue / NULL if empty
2674 **/
2675static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2676{
2677 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2678 struct ibmvfc_async_crq *crq;
2679
2680 crq = &async_crq->msgs[async_crq->cur];
2681 if (crq->valid & 0x80) {
2682 if (++async_crq->cur == async_crq->size)
2683 async_crq->cur = 0;
2684 } else
2685 crq = NULL;
2686
2687 return crq;
2688}
2689
2690/**
2691 * ibmvfc_next_crq - Returns the next entry in message queue
2692 * @vhost: ibmvfc host struct
2693 *
2694 * Returns:
2695 * Pointer to next entry in queue / NULL if empty
2696 **/
2697static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2698{
2699 struct ibmvfc_crq_queue *queue = &vhost->crq;
2700 struct ibmvfc_crq *crq;
2701
2702 crq = &queue->msgs[queue->cur];
2703 if (crq->valid & 0x80) {
2704 if (++queue->cur == queue->size)
2705 queue->cur = 0;
2706 } else
2707 crq = NULL;
2708
2709 return crq;
2710}
2711
2712/**
2713 * ibmvfc_interrupt - Interrupt handler
2714 * @irq: number of irq to handle, not used
2715 * @dev_instance: ibmvfc_host that received interrupt
2716 *
2717 * Returns:
2718 * IRQ_HANDLED
2719 **/
2720static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2721{
2722 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
039a0898
BK		 2723 unsigned long flags;
2724
2725 spin_lock_irqsave(vhost->host->host_lock, flags);
2726 vio_disable_interrupts(to_vio_dev(vhost->dev));
2727 tasklet_schedule(&vhost->tasklet);
2728 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2729 return IRQ_HANDLED;
2730}
2731
2732/**
2733 * ibmvfc_tasklet - Interrupt handler tasklet
2734 * @data: ibmvfc host struct
2735 *
2736 * Returns:
2737 * Nothing
2738 **/
2739static void ibmvfc_tasklet(void *data)
2740{
2741 struct ibmvfc_host *vhost = data;
072b91f9
BK		 2742 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2743 struct ibmvfc_crq *crq;
2744 struct ibmvfc_async_crq *async;
2745 unsigned long flags;
2746 int done = 0;
2747
2748 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9
BK		 2749 while (!done) {
2750 /* Pull all the valid messages off the CRQ */
2751 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2752 ibmvfc_handle_crq(crq, vhost);
2753 crq->valid = 0;
2754 }
2755
2756 /* Pull all the valid messages off the async CRQ */
2757 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2758 ibmvfc_handle_async(async, vhost);
2759 async->valid = 0;
2760 }
2761
2762 vio_enable_interrupts(vdev);
2763 if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2764 vio_disable_interrupts(vdev);
2765 ibmvfc_handle_crq(crq, vhost);
2766 crq->valid = 0;
2767 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2768 vio_disable_interrupts(vdev);
2769 ibmvfc_handle_async(async, vhost);
4081b77c 2770 async->valid = 0;
072b91f9
BK		 2771 } else
2772 done = 1;
2773 }
2774
2775 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 2776}
2777
2778/**
2779 * ibmvfc_init_tgt - Set the next init job step for the target
2780 * @tgt: ibmvfc target struct
2781 * @job_step: job step to perform
2782 *
2783 **/
2784static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2785 void (*job_step) (struct ibmvfc_target *))
2786{
2787 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2788 tgt->job_step = job_step;
2789 wake_up(&tgt->vhost->work_wait_q);
2790}
2791
2792/**
2793 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2794 * @tgt: ibmvfc target struct
2795 * @job_step: initialization job step
2796 *
7d0e4622
BK		 2797 * Returns: 1 if step will be retried / 0 if not
2798 *
072b91f9 2799 **/
7d0e4622 2800static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
072b91f9
BK		 2801 void (*job_step) (struct ibmvfc_target *))
2802{
1c41fa82 2803 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
072b91f9
BK		 2804 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2805 wake_up(&tgt->vhost->work_wait_q);
7d0e4622 2806 return 0;
072b91f9
BK		 2807 } else
2808 ibmvfc_init_tgt(tgt, job_step);
7d0e4622 2809 return 1;
072b91f9
BK		 2810}
2811
a3b7aeab
BK		 2812/* Defined in FC-LS */
2813static const struct {
2814 int code;
2815 int retry;
2816 int logged_in;
2817} prli_rsp [] = {
2818 { 0, 1, 0 },
2819 { 1, 0, 1 },
2820 { 2, 1, 0 },
2821 { 3, 1, 0 },
2822 { 4, 0, 0 },
2823 { 5, 0, 0 },
2824 { 6, 0, 1 },
2825 { 7, 0, 0 },
2826 { 8, 1, 0 },
2827};
2828
2829/**
2830 * ibmvfc_get_prli_rsp - Find PRLI response index
2831 * @flags: PRLI response flags
2832 *
2833 **/
2834static int ibmvfc_get_prli_rsp(u16 flags)
2835{
2836 int i;
2837 int code = (flags & 0x0f00) >> 8;
2838
2839 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
2840 if (prli_rsp[i].code == code)
2841 return i;
2842
2843 return 0;
2844}
2845
072b91f9
BK		 2846/**
2847 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2848 * @evt: ibmvfc event struct
2849 *
2850 **/
2851static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2852{
2853 struct ibmvfc_target *tgt = evt->tgt;
2854 struct ibmvfc_host *vhost = evt->vhost;
2855 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
a3b7aeab 2856 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
072b91f9 2857 u32 status = rsp->common.status;
7d0e4622 2858 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 2859
2860 vhost->discovery_threads--;
2861 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2862 switch (status) {
2863 case IBMVFC_MAD_SUCCESS:
a3b7aeab
BK		 2864 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
2865 parms->type, parms->flags, parms->service_parms);
2866
2867 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
2868 index = ibmvfc_get_prli_rsp(parms->flags);
2869 if (prli_rsp[index].logged_in) {
2870 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
2871 tgt->need_login = 0;
2872 tgt->ids.roles = 0;
2873 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
2874 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
2875 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
2876 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
43c8da90 2877 tgt->add_rport = 1;
a3b7aeab
BK		 2878 } else
2879 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2880 } else if (prli_rsp[index].retry)
2881 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2882 else
2883 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2884 } else
2885 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 2886 break;
2887 case IBMVFC_MAD_DRIVER_FAILED:
2888 break;
2889 case IBMVFC_MAD_CRQ_ERROR:
2890 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2891 break;
2892 case IBMVFC_MAD_FAILED:
2893 default:
072b91f9 2894 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 2895 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499
BK		 2896 else
2897 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 2898
2899 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2900 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2901 rsp->status, rsp->error, status);
072b91f9
BK		 2902 break;
2903 };
2904
2905 kref_put(&tgt->kref, ibmvfc_release_tgt);
2906 ibmvfc_free_event(evt);
2907 wake_up(&vhost->work_wait_q);
2908}
2909
2910/**
2911 * ibmvfc_tgt_send_prli - Send a process login
2912 * @tgt: ibmvfc target struct
2913 *
2914 **/
2915static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2916{
2917 struct ibmvfc_process_login *prli;
2918 struct ibmvfc_host *vhost = tgt->vhost;
2919 struct ibmvfc_event *evt;
2920
2921 if (vhost->discovery_threads >= disc_threads)
2922 return;
2923
2924 kref_get(&tgt->kref);
2925 evt = ibmvfc_get_event(vhost);
2926 vhost->discovery_threads++;
2927 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2928 evt->tgt = tgt;
2929 prli = &evt->iu.prli;
2930 memset(prli, 0, sizeof(*prli));
2931 prli->common.version = 1;
2932 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2933 prli->common.length = sizeof(*prli);
2934 prli->scsi_id = tgt->scsi_id;
2935
2936 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2937 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2938 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2939
2940 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2941 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2942 vhost->discovery_threads--;
2943 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2944 kref_put(&tgt->kref, ibmvfc_release_tgt);
2945 } else
2946 tgt_dbg(tgt, "Sent process login\n");
2947}
2948
2949/**
2950 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2951 * @evt: ibmvfc event struct
2952 *
2953 **/
2954static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
2955{
2956 struct ibmvfc_target *tgt = evt->tgt;
2957 struct ibmvfc_host *vhost = evt->vhost;
2958 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
2959 u32 status = rsp->common.status;
7d0e4622 2960 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 2961
2962 vhost->discovery_threads--;
2963 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2964 switch (status) {
2965 case IBMVFC_MAD_SUCCESS:
2966 tgt_dbg(tgt, "Port Login succeeded\n");
2967 if (tgt->ids.port_name &&
2968 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
2969 vhost->reinit = 1;
2970 tgt_dbg(tgt, "Port re-init required\n");
2971 break;
2972 }
2973 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
2974 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
2975 tgt->ids.port_id = tgt->scsi_id;
072b91f9
BK		 2976 memcpy(&tgt->service_parms, &rsp->service_parms,
2977 sizeof(tgt->service_parms));
2978 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
2979 sizeof(tgt->service_parms_change));
2980 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
2981 break;
2982 case IBMVFC_MAD_DRIVER_FAILED:
2983 break;
2984 case IBMVFC_MAD_CRQ_ERROR:
2985 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2986 break;
2987 case IBMVFC_MAD_FAILED:
2988 default:
072b91f9 2989 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 2990 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499
BK		 2991 else
2992 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 2993
2994 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2995 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
2996 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
2997 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
072b91f9
BK		 2998 break;
2999 };
3000
3001 kref_put(&tgt->kref, ibmvfc_release_tgt);
3002 ibmvfc_free_event(evt);
3003 wake_up(&vhost->work_wait_q);
3004}
3005
3006/**
3007 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3008 * @tgt: ibmvfc target struct
3009 *
3010 **/
3011static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3012{
3013 struct ibmvfc_port_login *plogi;
3014 struct ibmvfc_host *vhost = tgt->vhost;
3015 struct ibmvfc_event *evt;
3016
3017 if (vhost->discovery_threads >= disc_threads)
3018 return;
3019
3020 kref_get(&tgt->kref);
3021 evt = ibmvfc_get_event(vhost);
3022 vhost->discovery_threads++;
3023 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3024 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3025 evt->tgt = tgt;
3026 plogi = &evt->iu.plogi;
3027 memset(plogi, 0, sizeof(*plogi));
3028 plogi->common.version = 1;
3029 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3030 plogi->common.length = sizeof(*plogi);
3031 plogi->scsi_id = tgt->scsi_id;
3032
3033 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3034 vhost->discovery_threads--;
3035 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3036 kref_put(&tgt->kref, ibmvfc_release_tgt);
3037 } else
3038 tgt_dbg(tgt, "Sent port login\n");
3039}
3040
3041/**
3042 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3043 * @evt: ibmvfc event struct
3044 *
3045 **/
3046static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3047{
3048 struct ibmvfc_target *tgt = evt->tgt;
3049 struct ibmvfc_host *vhost = evt->vhost;
3050 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3051 u32 status = rsp->common.status;
3052
3053 vhost->discovery_threads--;
3054 ibmvfc_free_event(evt);
3055 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3056
3057 switch (status) {
3058 case IBMVFC_MAD_SUCCESS:
3059 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3060 break;
3061 case IBMVFC_MAD_DRIVER_FAILED:
3062 kref_put(&tgt->kref, ibmvfc_release_tgt);
3063 wake_up(&vhost->work_wait_q);
3064 return;
3065 case IBMVFC_MAD_FAILED:
3066 default:
3067 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3068 break;
3069 };
3070
3071 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3072 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3073 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3074 tgt->scsi_id != tgt->new_scsi_id)
3075 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3076 kref_put(&tgt->kref, ibmvfc_release_tgt);
3077 wake_up(&vhost->work_wait_q);
3078}
3079
3080/**
3081 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3082 * @tgt: ibmvfc target struct
3083 *
3084 **/
3085static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3086{
3087 struct ibmvfc_implicit_logout *mad;
3088 struct ibmvfc_host *vhost = tgt->vhost;
3089 struct ibmvfc_event *evt;
3090
3091 if (vhost->discovery_threads >= disc_threads)
3092 return;
3093
3094 kref_get(&tgt->kref);
3095 evt = ibmvfc_get_event(vhost);
3096 vhost->discovery_threads++;
3097 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3098 evt->tgt = tgt;
3099 mad = &evt->iu.implicit_logout;
3100 memset(mad, 0, sizeof(*mad));
3101 mad->common.version = 1;
3102 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3103 mad->common.length = sizeof(*mad);
3104 mad->old_scsi_id = tgt->scsi_id;
3105
3106 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3107 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3108 vhost->discovery_threads--;
3109 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3110 kref_put(&tgt->kref, ibmvfc_release_tgt);
3111 } else
3112 tgt_dbg(tgt, "Sent Implicit Logout\n");
3113}
3114
989b8545
BK		 3115/**
3116 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3117 * @mad: ibmvfc passthru mad struct
3118 * @tgt: ibmvfc target struct
3119 *
3120 * Returns:
3121 * 1 if PLOGI needed / 0 if PLOGI not needed
3122 **/
3123static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3124 struct ibmvfc_target *tgt)
3125{
3126 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3127 sizeof(tgt->ids.port_name)))
3128 return 1;
3129 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3130 sizeof(tgt->ids.node_name)))
3131 return 1;
3132 if (mad->fc_iu.response[6] != tgt->scsi_id)
3133 return 1;
3134 return 0;
3135}
3136
3137/**
3138 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3139 * @evt: ibmvfc event struct
3140 *
3141 **/
3142static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3143{
3144 struct ibmvfc_target *tgt = evt->tgt;
3145 struct ibmvfc_host *vhost = evt->vhost;
3146 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3147 u32 status = mad->common.status;
3148 u8 fc_reason, fc_explain;
3149
3150 vhost->discovery_threads--;
3151 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
10501e1c 3152 del_timer(&tgt->timer);
989b8545
BK		 3153
3154 switch (status) {
3155 case IBMVFC_MAD_SUCCESS:
3156 tgt_dbg(tgt, "ADISC succeeded\n");
3157 if (ibmvfc_adisc_needs_plogi(mad, tgt))
5e47167b 3158 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3159 break;
3160 case IBMVFC_MAD_DRIVER_FAILED:
3161 break;
3162 case IBMVFC_MAD_FAILED:
3163 default:
5e47167b 3164 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3165 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3166 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3167 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3168 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3169 mad->iu.status, mad->iu.error,
3170 ibmvfc_get_fc_type(fc_reason), fc_reason,
3171 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3172 break;
3173 };
3174
3175 kref_put(&tgt->kref, ibmvfc_release_tgt);
3176 ibmvfc_free_event(evt);
3177 wake_up(&vhost->work_wait_q);
3178}
3179
3180/**
3181 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3182 * @evt: ibmvfc event struct
3183 *
3184 **/
3185static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3186{
3187 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3188
3189 memset(mad, 0, sizeof(*mad));
3190 mad->common.version = 1;
3191 mad->common.opcode = IBMVFC_PASSTHRU;
3192 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3193 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3194 offsetof(struct ibmvfc_passthru_mad, iu);
3195 mad->cmd_ioba.len = sizeof(mad->iu);
3196 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3197 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3198 mad->iu.cmd.va = (u64)evt->crq.ioba +
3199 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3200 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3201 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3202 mad->iu.rsp.va = (u64)evt->crq.ioba +
3203 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3204 offsetof(struct ibmvfc_passthru_fc_iu, response);
3205 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3206}
3207
10501e1c
BK		 3208/**
3209 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3210 * @evt: ibmvfc event struct
3211 *
3212 * Just cleanup this event struct. Everything else is handled by
3213 * the ADISC completion handler. If the ADISC never actually comes
3214 * back, we still have the timer running on the ADISC event struct
3215 * which will fire and cause the CRQ to get reset.
3216 *
3217 **/
3218static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3219{
3220 struct ibmvfc_host *vhost = evt->vhost;
3221 struct ibmvfc_target *tgt = evt->tgt;
3222
3223 tgt_dbg(tgt, "ADISC cancel complete\n");
3224 vhost->abort_threads--;
3225 ibmvfc_free_event(evt);
3226 kref_put(&tgt->kref, ibmvfc_release_tgt);
3227 wake_up(&vhost->work_wait_q);
3228}
3229
3230/**
3231 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3232 * @tgt: ibmvfc target struct
3233 *
3234 * If an ADISC times out, send a cancel. If the cancel times
3235 * out, reset the CRQ. When the ADISC comes back as cancelled,
3236 * log back into the target.
3237 **/
3238static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3239{
3240 struct ibmvfc_host *vhost = tgt->vhost;
3241 struct ibmvfc_event *evt;
3242 struct ibmvfc_tmf *tmf;
3243 unsigned long flags;
3244 int rc;
3245
3246 tgt_dbg(tgt, "ADISC timeout\n");
3247 spin_lock_irqsave(vhost->host->host_lock, flags);
3248 if (vhost->abort_threads >= disc_threads ||
3249 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3250 vhost->state != IBMVFC_INITIALIZING ||
3251 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3252 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3253 return;
3254 }
3255
3256 vhost->abort_threads++;
3257 kref_get(&tgt->kref);
3258 evt = ibmvfc_get_event(vhost);
3259 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3260
3261 evt->tgt = tgt;
3262 tmf = &evt->iu.tmf;
3263 memset(tmf, 0, sizeof(*tmf));
3264 tmf->common.version = 1;
3265 tmf->common.opcode = IBMVFC_TMF_MAD;
3266 tmf->common.length = sizeof(*tmf);
3267 tmf->scsi_id = tgt->scsi_id;
3268 tmf->cancel_key = tgt->cancel_key;
3269
3270 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3271
3272 if (rc) {
3273 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3274 vhost->abort_threads--;
3275 kref_put(&tgt->kref, ibmvfc_release_tgt);
3276 __ibmvfc_reset_host(vhost);
3277 } else
3278 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3279 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3280}
3281
989b8545
BK		 3282/**
3283 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3284 * @tgt: ibmvfc target struct
3285 *
10501e1c
BK		 3286 * When sending an ADISC we end up with two timers running. The
3287 * first timer is the timer in the ibmvfc target struct. If this
3288 * fires, we send a cancel to the target. The second timer is the
3289 * timer on the ibmvfc event for the ADISC, which is longer. If that
3290 * fires, it means the ADISC timed out and our attempt to cancel it
3291 * also failed, so we need to reset the CRQ.
989b8545
BK		 3292 **/
3293static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3294{
3295 struct ibmvfc_passthru_mad *mad;
3296 struct ibmvfc_host *vhost = tgt->vhost;
3297 struct ibmvfc_event *evt;
3298
3299 if (vhost->discovery_threads >= disc_threads)
3300 return;
3301
3302 kref_get(&tgt->kref);
3303 evt = ibmvfc_get_event(vhost);
3304 vhost->discovery_threads++;
3305 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3306 evt->tgt = tgt;
3307
3308 ibmvfc_init_passthru(evt);
3309 mad = &evt->iu.passthru;
3310 mad->iu.flags = IBMVFC_FC_ELS;
3311 mad->iu.scsi_id = tgt->scsi_id;
10501e1c 3312 mad->iu.cancel_key = tgt->cancel_key;
989b8545
BK		 3313
3314 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3315 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3316 sizeof(vhost->login_buf->resp.port_name));
3317 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3318 sizeof(vhost->login_buf->resp.node_name));
3319 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3320
10501e1c
BK		 3321 if (timer_pending(&tgt->timer))
3322 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3323 else {
3324 tgt->timer.data = (unsigned long) tgt;
3325 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3326 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3327 add_timer(&tgt->timer);
3328 }
3329
989b8545 3330 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
10501e1c 3331 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
989b8545 3332 vhost->discovery_threads--;
10501e1c 3333 del_timer(&tgt->timer);
989b8545
BK		 3334 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3335 kref_put(&tgt->kref, ibmvfc_release_tgt);
3336 } else
3337 tgt_dbg(tgt, "Sent ADISC\n");
3338}
3339
072b91f9
BK		 3340/**
3341 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3342 * @evt: ibmvfc event struct
3343 *
3344 **/
3345static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3346{
3347 struct ibmvfc_target *tgt = evt->tgt;
3348 struct ibmvfc_host *vhost = evt->vhost;
3349 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3350 u32 status = rsp->common.status;
7d0e4622 3351 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3352
3353 vhost->discovery_threads--;
3354 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3355 switch (status) {
3356 case IBMVFC_MAD_SUCCESS:
3357 tgt_dbg(tgt, "Query Target succeeded\n");
3358 tgt->new_scsi_id = rsp->scsi_id;
3359 if (rsp->scsi_id != tgt->scsi_id)
3360 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3361 else
3362 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3363 break;
3364 case IBMVFC_MAD_DRIVER_FAILED:
3365 break;
3366 case IBMVFC_MAD_CRQ_ERROR:
3367 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3368 break;
3369 case IBMVFC_MAD_FAILED:
3370 default:
072b91f9
BK		 3371 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3372 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3373 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3374 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3375 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 3376 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499
BK		 3377 else
3378 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3379
3380 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3381 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3382 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3383 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
072b91f9
BK		 3384 break;
3385 };
3386
3387 kref_put(&tgt->kref, ibmvfc_release_tgt);
3388 ibmvfc_free_event(evt);
3389 wake_up(&vhost->work_wait_q);
3390}
3391
3392/**
3393 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3394 * @tgt: ibmvfc target struct
3395 *
3396 **/
3397static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3398{
3399 struct ibmvfc_query_tgt *query_tgt;
3400 struct ibmvfc_host *vhost = tgt->vhost;
3401 struct ibmvfc_event *evt;
3402
3403 if (vhost->discovery_threads >= disc_threads)
3404 return;
3405
3406 kref_get(&tgt->kref);
3407 evt = ibmvfc_get_event(vhost);
3408 vhost->discovery_threads++;
3409 evt->tgt = tgt;
3410 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3411 query_tgt = &evt->iu.query_tgt;
3412 memset(query_tgt, 0, sizeof(*query_tgt));
3413 query_tgt->common.version = 1;
3414 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3415 query_tgt->common.length = sizeof(*query_tgt);
3416 query_tgt->wwpn = tgt->ids.port_name;
3417
3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3419 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3420 vhost->discovery_threads--;
3421 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3422 kref_put(&tgt->kref, ibmvfc_release_tgt);
3423 } else
3424 tgt_dbg(tgt, "Sent Query Target\n");
3425}
3426
3427/**
3428 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3429 * @vhost: ibmvfc host struct
3430 * @scsi_id: SCSI ID to allocate target for
3431 *
3432 * Returns:
3433 * 0 on success / other on failure
3434 **/
3435static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3436{
3437 struct ibmvfc_target *tgt;
3438 unsigned long flags;
3439
3440 spin_lock_irqsave(vhost->host->host_lock, flags);
3441 list_for_each_entry(tgt, &vhost->targets, queue) {
3442 if (tgt->scsi_id == scsi_id) {
3443 if (tgt->need_login)
3444 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3445 goto unlock_out;
3446 }
3447 }
3448 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3449
7270b9bd 3450 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
072b91f9 3451 if (!tgt) {
775a42ec 3452 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
072b91f9
BK		 3453 scsi_id);
3454 return -ENOMEM;
3455 }
3456
0883e3b3 3457 memset(tgt, 0, sizeof(*tgt));
072b91f9
BK		 3458 tgt->scsi_id = scsi_id;
3459 tgt->new_scsi_id = scsi_id;
3460 tgt->vhost = vhost;
3461 tgt->need_login = 1;
10501e1c
BK		 3462 tgt->cancel_key = vhost->task_set++;
3463 init_timer(&tgt->timer);
072b91f9
BK		 3464 kref_init(&tgt->kref);
3465 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3466 spin_lock_irqsave(vhost->host->host_lock, flags);
3467 list_add_tail(&tgt->queue, &vhost->targets);
3468
3469unlock_out:
3470 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3471 return 0;
3472}
3473
3474/**
3475 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3476 * @vhost: ibmvfc host struct
3477 *
3478 * Returns:
3479 * 0 on success / other on failure
3480 **/
3481static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3482{
3483 int i, rc;
3484
3485 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3486 rc = ibmvfc_alloc_target(vhost,
3487 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3488
3489 return rc;
3490}
3491
3492/**
3493 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3494 * @evt: ibmvfc event struct
3495 *
3496 **/
3497static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3498{
3499 struct ibmvfc_host *vhost = evt->vhost;
3500 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3501 u32 mad_status = rsp->common.status;
7d0e4622 3502 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3503
3504 switch (mad_status) {
3505 case IBMVFC_MAD_SUCCESS:
3506 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3507 vhost->num_targets = rsp->num_written;
3508 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3509 break;
3510 case IBMVFC_MAD_FAILED:
7d0e4622
BK		 3511 level += ibmvfc_retry_host_init(vhost);
3512 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3513 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
072b91f9
BK		 3514 break;
3515 case IBMVFC_MAD_DRIVER_FAILED:
3516 break;
3517 default:
3518 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3519 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3520 break;
3521 }
3522
3523 ibmvfc_free_event(evt);
3524 wake_up(&vhost->work_wait_q);
3525}
3526
3527/**
3528 * ibmvfc_discover_targets - Send Discover Targets MAD
3529 * @vhost: ibmvfc host struct
3530 *
3531 **/
3532static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3533{
3534 struct ibmvfc_discover_targets *mad;
3535 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3536
3537 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3538 mad = &evt->iu.discover_targets;
3539 memset(mad, 0, sizeof(*mad));
3540 mad->common.version = 1;
3541 mad->common.opcode = IBMVFC_DISC_TARGETS;
3542 mad->common.length = sizeof(*mad);
3543 mad->bufflen = vhost->disc_buf_sz;
3544 mad->buffer.va = vhost->disc_buf_dma;
3545 mad->buffer.len = vhost->disc_buf_sz;
3546 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3547
3548 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3549 ibmvfc_dbg(vhost, "Sent discover targets\n");
3550 else
3551 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3552}
3553
3554/**
3555 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3556 * @evt: ibmvfc event struct
3557 *
3558 **/
3559static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3560{
3561 struct ibmvfc_host *vhost = evt->vhost;
3562 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3563 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3564 unsigned int npiv_max_sectors;
7d0e4622 3565 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3566
3567 switch (mad_status) {
3568 case IBMVFC_MAD_SUCCESS:
3569 ibmvfc_free_event(evt);
3570 break;
3571 case IBMVFC_MAD_FAILED:
072b91f9 3572 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 3573 level += ibmvfc_retry_host_init(vhost);
072b91f9
BK		 3574 else
3575 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
7d0e4622
BK		 3576 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
3577 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
072b91f9
BK		 3578 ibmvfc_free_event(evt);
3579 return;
3580 case IBMVFC_MAD_CRQ_ERROR:
3581 ibmvfc_retry_host_init(vhost);
3582 case IBMVFC_MAD_DRIVER_FAILED:
3583 ibmvfc_free_event(evt);
3584 return;
3585 default:
3586 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3587 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3588 ibmvfc_free_event(evt);
3589 return;
3590 }
3591
3592 vhost->client_migrated = 0;
3593
3594 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3595 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3596 rsp->flags);
3597 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3598 wake_up(&vhost->work_wait_q);
3599 return;
3600 }
3601
3602 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3603 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3604 rsp->max_cmds);
3605 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3606 wake_up(&vhost->work_wait_q);
3607 return;
3608 }
3609
79111d08 3610 vhost->logged_in = 1;
072b91f9
BK		 3611 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3612 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3613 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3614 rsp->drc_name, npiv_max_sectors);
3615
3616 fc_host_fabric_name(vhost->host) = rsp->node_name;
3617 fc_host_node_name(vhost->host) = rsp->node_name;
3618 fc_host_port_name(vhost->host) = rsp->port_name;
3619 fc_host_port_id(vhost->host) = rsp->scsi_id;
3620 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3621 fc_host_supported_classes(vhost->host) = 0;
3622 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3623 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3624 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3625 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3626 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3627 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3628 fc_host_maxframe_size(vhost->host) =
3629 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3630
3631 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3632 vhost->host->max_sectors = npiv_max_sectors;
3633 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3634 wake_up(&vhost->work_wait_q);
3635}
3636
3637/**
3638 * ibmvfc_npiv_login - Sends NPIV login
3639 * @vhost: ibmvfc host struct
3640 *
3641 **/
3642static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3643{
3644 struct ibmvfc_npiv_login_mad *mad;
3645 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3646
3647 ibmvfc_gather_partition_info(vhost);
3648 ibmvfc_set_login_info(vhost);
3649 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3650
3651 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3652 mad = &evt->iu.npiv_login;
3653 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3654 mad->common.version = 1;
3655 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3656 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3657 mad->buffer.va = vhost->login_buf_dma;
3658 mad->buffer.len = sizeof(*vhost->login_buf);
3659
072b91f9
BK		 3660 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3661
3662 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3663 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3664 else
3665 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3666};
3667
79111d08
BK		 3668/**
3669 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
3670 * @vhost: ibmvfc host struct
3671 *
3672 **/
3673static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
3674{
3675 struct ibmvfc_host *vhost = evt->vhost;
3676 u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
3677
3678 ibmvfc_free_event(evt);
3679
3680 switch (mad_status) {
3681 case IBMVFC_MAD_SUCCESS:
3682 if (list_empty(&vhost->sent) &&
3683 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
3684 ibmvfc_init_host(vhost, 0);
3685 return;
3686 }
3687 break;
3688 case IBMVFC_MAD_FAILED:
3689 case IBMVFC_MAD_NOT_SUPPORTED:
3690 case IBMVFC_MAD_CRQ_ERROR:
3691 case IBMVFC_MAD_DRIVER_FAILED:
3692 default:
3693 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
3694 break;
3695 }
3696
3697 ibmvfc_hard_reset_host(vhost);
3698}
3699
3700/**
3701 * ibmvfc_npiv_logout - Issue an NPIV Logout
3702 * @vhost: ibmvfc host struct
3703 *
3704 **/
3705static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
3706{
3707 struct ibmvfc_npiv_logout_mad *mad;
3708 struct ibmvfc_event *evt;
3709
3710 evt = ibmvfc_get_event(vhost);
3711 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
3712
3713 mad = &evt->iu.npiv_logout;
3714 memset(mad, 0, sizeof(*mad));
3715 mad->common.version = 1;
3716 mad->common.opcode = IBMVFC_NPIV_LOGOUT;
3717 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
3718
3719 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
3720
3721 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3722 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
3723 else
3724 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3725}
3726
072b91f9
BK		 3727/**
3728 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3729 * @vhost: ibmvfc host struct
3730 *
3731 * Returns:
3732 * 1 if work to do / 0 if not
3733 **/
3734static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3735{
3736 struct ibmvfc_target *tgt;
3737
3738 list_for_each_entry(tgt, &vhost->targets, queue) {
3739 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3740 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3741 return 1;
3742 }
3743
3744 return 0;
3745}
3746
3747/**
3748 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3749 * @vhost: ibmvfc host struct
3750 *
3751 * Returns:
3752 * 1 if work to do / 0 if not
3753 **/
3754static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3755{
3756 struct ibmvfc_target *tgt;
3757
3758 if (kthread_should_stop())
3759 return 1;
3760 switch (vhost->action) {
3761 case IBMVFC_HOST_ACTION_NONE:
3762 case IBMVFC_HOST_ACTION_INIT_WAIT:
79111d08 3763 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 3764 return 0;
3765 case IBMVFC_HOST_ACTION_TGT_INIT:
3766 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3767 if (vhost->discovery_threads == disc_threads)
3768 return 0;
3769 list_for_each_entry(tgt, &vhost->targets, queue)
3770 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3771 return 1;
3772 list_for_each_entry(tgt, &vhost->targets, queue)
3773 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3774 return 0;
3775 return 1;
79111d08 3776 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 3777 case IBMVFC_HOST_ACTION_INIT:
3778 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
072b91f9 3779 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 3780 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 3781 case IBMVFC_HOST_ACTION_QUERY:
3782 default:
3783 break;
3784 };
3785
3786 return 1;
3787}
3788
3789/**
3790 * ibmvfc_work_to_do - Is there task level work to do?
3791 * @vhost: ibmvfc host struct
3792 *
3793 * Returns:
3794 * 1 if work to do / 0 if not
3795 **/
3796static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3797{
3798 unsigned long flags;
3799 int rc;
3800
3801 spin_lock_irqsave(vhost->host->host_lock, flags);
3802 rc = __ibmvfc_work_to_do(vhost);
3803 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3804 return rc;
3805}
3806
3807/**
3808 * ibmvfc_log_ae - Log async events if necessary
3809 * @vhost: ibmvfc host struct
3810 * @events: events to log
3811 *
3812 **/
3813static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3814{
3815 if (events & IBMVFC_AE_RSCN)
3816 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3817 if ((events & IBMVFC_AE_LINKDOWN) &&
3818 vhost->state >= IBMVFC_HALTED)
3819 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3820 if ((events & IBMVFC_AE_LINKUP) &&
3821 vhost->state == IBMVFC_INITIALIZING)
3822 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3823}
3824
3825/**
3826 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3827 * @tgt: ibmvfc target struct
3828 *
3829 **/
3830static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3831{
3832 struct ibmvfc_host *vhost = tgt->vhost;
43c8da90 3833 struct fc_rport *rport;
072b91f9
BK		 3834 unsigned long flags;
3835
43c8da90
BK		 3836 tgt_dbg(tgt, "Adding rport\n");
3837 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3838 spin_lock_irqsave(vhost->host->host_lock, flags);
3839
3840 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3841 tgt_dbg(tgt, "Deleting rport\n");
3842 list_del(&tgt->queue);
0883e3b3 3843 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 3844 fc_remote_port_delete(rport);
3845 del_timer_sync(&tgt->timer);
3846 kref_put(&tgt->kref, ibmvfc_release_tgt);
0883e3b3
BK		 3847 return;
3848 }
3849
072b91f9
BK		 3850 if (rport) {
3851 tgt_dbg(tgt, "rport add succeeded\n");
43c8da90 3852 tgt->rport = rport;
072b91f9
BK		 3853 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3854 rport->supported_classes = 0;
52d7e861 3855 tgt->target_id = rport->scsi_target_id;
072b91f9
BK		 3856 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3857 rport->supported_classes |= FC_COS_CLASS1;
3858 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3859 rport->supported_classes |= FC_COS_CLASS2;
3860 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3861 rport->supported_classes |= FC_COS_CLASS3;
3862 } else
3863 tgt_dbg(tgt, "rport add failed\n");
3864 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3865}
3866
3867/**
3868 * ibmvfc_do_work - Do task level work
3869 * @vhost: ibmvfc host struct
3870 *
3871 **/
3872static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3873{
3874 struct ibmvfc_target *tgt;
3875 unsigned long flags;
3876 struct fc_rport *rport;
3877
3878 ibmvfc_log_ae(vhost, vhost->events_to_log);
3879 spin_lock_irqsave(vhost->host->host_lock, flags);
3880 vhost->events_to_log = 0;
3881 switch (vhost->action) {
3882 case IBMVFC_HOST_ACTION_NONE:
79111d08 3883 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 3884 case IBMVFC_HOST_ACTION_INIT_WAIT:
3885 break;
79111d08
BK		 3886 case IBMVFC_HOST_ACTION_LOGO:
3887 vhost->job_step(vhost);
3888 break;
072b91f9
BK		 3889 case IBMVFC_HOST_ACTION_INIT:
3890 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
1c41fa82
BK		 3891 if (vhost->delay_init) {
3892 vhost->delay_init = 0;
3893 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2131b33 3894 ssleep(15);
1c41fa82
BK		 3895 return;
3896 } else
3897 vhost->job_step(vhost);
072b91f9
BK		 3898 break;
3899 case IBMVFC_HOST_ACTION_QUERY:
3900 list_for_each_entry(tgt, &vhost->targets, queue)
3901 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3902 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3903 break;
3904 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3905 list_for_each_entry(tgt, &vhost->targets, queue) {
3906 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3907 tgt->job_step(tgt);
3908 break;
3909 }
3910 }
3911
3912 if (!ibmvfc_dev_init_to_do(vhost))
3913 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3914 break;
3915 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 3916 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 3917 list_for_each_entry(tgt, &vhost->targets, queue) {
3918 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3919 tgt_dbg(tgt, "Deleting rport\n");
3920 rport = tgt->rport;
3921 tgt->rport = NULL;
3922 list_del(&tgt->queue);
3923 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3924 if (rport)
3925 fc_remote_port_delete(rport);
10501e1c 3926 del_timer_sync(&tgt->timer);
072b91f9
BK		 3927 kref_put(&tgt->kref, ibmvfc_release_tgt);
3928 return;
3929 }
3930 }
3931
3932 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499 3933 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
43c8da90
BK		 3934 if (vhost->reinit) {
3935 vhost->reinit = 0;
3936 scsi_block_requests(vhost->host);
3937 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3938 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3939 } else {
3940 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3941 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3942 wake_up(&vhost->init_wait_q);
3943 schedule_work(&vhost->rport_add_work_q);
3944 vhost->init_retries = 0;
3945 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3946 scsi_unblock_requests(vhost->host);
3947 }
3948
10e79499
BK		 3949 return;
3950 } else {
3951 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3952 vhost->job_step = ibmvfc_discover_targets;
3953 }
072b91f9
BK		 3954 } else {
3955 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3956 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3957 scsi_unblock_requests(vhost->host);
3958 wake_up(&vhost->init_wait_q);
3959 return;
3960 }
3961 break;
3962 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3963 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
3964 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3965 ibmvfc_alloc_targets(vhost);
3966 spin_lock_irqsave(vhost->host->host_lock, flags);
3967 break;
3968 case IBMVFC_HOST_ACTION_TGT_INIT:
3969 list_for_each_entry(tgt, &vhost->targets, queue) {
3970 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3971 tgt->job_step(tgt);
3972 break;
3973 }
3974 }
3975
10e79499
BK		 3976 if (!ibmvfc_dev_init_to_do(vhost))
3977 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9 3978 break;
072b91f9
BK		 3979 default:
3980 break;
3981 };
3982
3983 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3984}
3985
3986/**
3987 * ibmvfc_work - Do task level work
3988 * @data: ibmvfc host struct
3989 *
3990 * Returns:
3991 * zero
3992 **/
3993static int ibmvfc_work(void *data)
3994{
3995 struct ibmvfc_host *vhost = data;
3996 int rc;
3997
3998 set_user_nice(current, -20);
3999
4000 while (1) {
4001 rc = wait_event_interruptible(vhost->work_wait_q,
4002 ibmvfc_work_to_do(vhost));
4003
4004 BUG_ON(rc);
4005
4006 if (kthread_should_stop())
4007 break;
4008
4009 ibmvfc_do_work(vhost);
4010 }
4011
4012 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4013 return 0;
4014}
4015
4016/**
4017 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4018 * @vhost: ibmvfc host struct
4019 *
4020 * Allocates a page for messages, maps it for dma, and registers
4021 * the crq with the hypervisor.
4022 *
4023 * Return value:
4024 * zero on success / other on failure
4025 **/
4026static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4027{
4028 int rc, retrc = -ENOMEM;
4029 struct device *dev = vhost->dev;
4030 struct vio_dev *vdev = to_vio_dev(dev);
4031 struct ibmvfc_crq_queue *crq = &vhost->crq;
4032
4033 ENTER;
4034 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4035
4036 if (!crq->msgs)
4037 return -ENOMEM;
4038
4039 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4040 crq->msg_token = dma_map_single(dev, crq->msgs,
4041 PAGE_SIZE, DMA_BIDIRECTIONAL);
4042
8d8bb39b 4043 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 4044 goto map_failed;
4045
4046 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4047 crq->msg_token, PAGE_SIZE);
4048
4049 if (rc == H_RESOURCE)
4050 /* maybe kexecing and resource is busy. try a reset */
4051 retrc = rc = ibmvfc_reset_crq(vhost);
4052
4053 if (rc == H_CLOSED)
4054 dev_warn(dev, "Partner adapter not ready\n");
4055 else if (rc) {
4056 dev_warn(dev, "Error %d opening adapter\n", rc);
4057 goto reg_crq_failed;
4058 }
4059
4060 retrc = 0;
4061
039a0898
BK		 4062 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4063
072b91f9
BK		 4064 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4065 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4066 goto req_irq_failed;
4067 }
4068
4069 if ((rc = vio_enable_interrupts(vdev))) {
4070 dev_err(dev, "Error %d enabling interrupts\n", rc);
4071 goto req_irq_failed;
4072 }
4073
4074 crq->cur = 0;
4075 LEAVE;
4076 return retrc;
4077
4078req_irq_failed:
039a0898 4079 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 4080 do {
4081 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4082 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4083reg_crq_failed:
4084 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4085map_failed:
4086 free_page((unsigned long)crq->msgs);
4087 return retrc;
4088}
4089
4090/**
4091 * ibmvfc_free_mem - Free memory for vhost
4092 * @vhost: ibmvfc host struct
4093 *
4094 * Return value:
4095 * none
4096 **/
4097static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4098{
4099 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4100
4101 ENTER;
4102 mempool_destroy(vhost->tgt_pool);
4103 kfree(vhost->trace);
4104 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4105 vhost->disc_buf_dma);
4106 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4107 vhost->login_buf, vhost->login_buf_dma);
4108 dma_pool_destroy(vhost->sg_pool);
4109 dma_unmap_single(vhost->dev, async_q->msg_token,
4110 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4111 free_page((unsigned long)async_q->msgs);
4112 LEAVE;
4113}
4114
4115/**
4116 * ibmvfc_alloc_mem - Allocate memory for vhost
4117 * @vhost: ibmvfc host struct
4118 *
4119 * Return value:
4120 * 0 on success / non-zero on failure
4121 **/
4122static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4123{
4124 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4125 struct device *dev = vhost->dev;
4126
4127 ENTER;
4128 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4129 if (!async_q->msgs) {
4130 dev_err(dev, "Couldn't allocate async queue.\n");
4131 goto nomem;
4132 }
4133
4134 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4135 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4136 async_q->size * sizeof(*async_q->msgs),
4137 DMA_BIDIRECTIONAL);
4138
8d8bb39b 4139 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 4140 dev_err(dev, "Failed to map async queue\n");
4141 goto free_async_crq;
4142 }
4143
4144 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4145 SG_ALL * sizeof(struct srp_direct_buf),
4146 sizeof(struct srp_direct_buf), 0);
4147
4148 if (!vhost->sg_pool) {
4149 dev_err(dev, "Failed to allocate sg pool\n");
4150 goto unmap_async_crq;
4151 }
4152
4153 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4154 &vhost->login_buf_dma, GFP_KERNEL);
4155
4156 if (!vhost->login_buf) {
4157 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4158 goto free_sg_pool;
4159 }
4160
4161 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4162 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4163 &vhost->disc_buf_dma, GFP_KERNEL);
4164
4165 if (!vhost->disc_buf) {
4166 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4167 goto free_login_buffer;
4168 }
4169
4170 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4171 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4172
4173 if (!vhost->trace)
4174 goto free_disc_buffer;
4175
4176 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
4177 sizeof(struct ibmvfc_target));
4178
4179 if (!vhost->tgt_pool) {
4180 dev_err(dev, "Couldn't allocate target memory pool\n");
4181 goto free_trace;
4182 }
4183
4184 LEAVE;
4185 return 0;
4186
4187free_trace:
4188 kfree(vhost->trace);
4189free_disc_buffer:
4190 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4191 vhost->disc_buf_dma);
4192free_login_buffer:
4193 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4194 vhost->login_buf, vhost->login_buf_dma);
4195free_sg_pool:
4196 dma_pool_destroy(vhost->sg_pool);
4197unmap_async_crq:
4198 dma_unmap_single(dev, async_q->msg_token,
4199 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4200free_async_crq:
4201 free_page((unsigned long)async_q->msgs);
4202nomem:
4203 LEAVE;
4204 return -ENOMEM;
4205}
4206
43c8da90
BK		 4207/**
4208 * ibmvfc_rport_add_thread - Worker thread for rport adds
4209 * @work: work struct
4210 *
4211 **/
4212static void ibmvfc_rport_add_thread(struct work_struct *work)
4213{
4214 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4215 rport_add_work_q);
4216 struct ibmvfc_target *tgt;
4217 struct fc_rport *rport;
4218 unsigned long flags;
4219 int did_work;
4220
4221 ENTER;
4222 spin_lock_irqsave(vhost->host->host_lock, flags);
4223 do {
4224 did_work = 0;
4225 if (vhost->state != IBMVFC_ACTIVE)
4226 break;
4227
4228 list_for_each_entry(tgt, &vhost->targets, queue) {
4229 if (tgt->add_rport) {
4230 did_work = 1;
4231 tgt->add_rport = 0;
4232 kref_get(&tgt->kref);
4233 rport = tgt->rport;
4234 if (!rport) {
4235 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4236 ibmvfc_tgt_add_rport(tgt);
4237 } else if (get_device(&rport->dev)) {
4238 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4239 tgt_dbg(tgt, "Setting rport roles\n");
4240 fc_remote_port_rolechg(rport, tgt->ids.roles);
4241 put_device(&rport->dev);
4242 }
4243
4244 kref_put(&tgt->kref, ibmvfc_release_tgt);
4245 spin_lock_irqsave(vhost->host->host_lock, flags);
4246 break;
4247 }
4248 }
4249 } while(did_work);
4250
4251 if (vhost->state == IBMVFC_ACTIVE)
4252 vhost->scan_complete = 1;
4253 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4254 LEAVE;
4255}
4256
072b91f9
BK		 4257/**
4258 * ibmvfc_probe - Adapter hot plug add entry point
4259 * @vdev: vio device struct
4260 * @id: vio device id struct
4261 *
4262 * Return value:
4263 * 0 on success / non-zero on failure
4264 **/
4265static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4266{
4267 struct ibmvfc_host *vhost;
4268 struct Scsi_Host *shost;
4269 struct device *dev = &vdev->dev;
4270 int rc = -ENOMEM;
4271
4272 ENTER;
4273 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4274 if (!shost) {
4275 dev_err(dev, "Couldn't allocate host data\n");
4276 goto out;
4277 }
4278
4279 shost->transportt = ibmvfc_transport_template;
4280 shost->can_queue = max_requests;
4281 shost->max_lun = max_lun;
4282 shost->max_id = max_targets;
4283 shost->max_sectors = IBMVFC_MAX_SECTORS;
4284 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4285 shost->unique_id = shost->host_no;
4286
4287 vhost = shost_priv(shost);
4288 INIT_LIST_HEAD(&vhost->sent);
4289 INIT_LIST_HEAD(&vhost->free);
4290 INIT_LIST_HEAD(&vhost->targets);
4291 sprintf(vhost->name, IBMVFC_NAME);
4292 vhost->host = shost;
4293 vhost->dev = dev;
4294 vhost->partition_number = -1;
4295 vhost->log_level = log_level;
10501e1c 4296 vhost->task_set = 1;
072b91f9
BK		 4297 strcpy(vhost->partition_name, "UNKNOWN");
4298 init_waitqueue_head(&vhost->work_wait_q);
4299 init_waitqueue_head(&vhost->init_wait_q);
43c8da90 4300 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
072b91f9
BK		 4301
4302 if ((rc = ibmvfc_alloc_mem(vhost)))
4303 goto free_scsi_host;
4304
4305 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4306 shost->host_no);
4307
4308 if (IS_ERR(vhost->work_thread)) {
4309 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4310 PTR_ERR(vhost->work_thread));
4311 goto free_host_mem;
4312 }
4313
4314 if ((rc = ibmvfc_init_crq(vhost))) {
4315 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4316 goto kill_kthread;
4317 }
4318
4319 if ((rc = ibmvfc_init_event_pool(vhost))) {
4320 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4321 goto release_crq;
4322 }
4323
4324 if ((rc = scsi_add_host(shost, dev)))
4325 goto release_event_pool;
4326
4327 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4328 &ibmvfc_trace_attr))) {
4329 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4330 goto remove_shost;
4331 }
4332
4333 dev_set_drvdata(dev, vhost);
4334 spin_lock(&ibmvfc_driver_lock);
4335 list_add_tail(&vhost->queue, &ibmvfc_head);
4336 spin_unlock(&ibmvfc_driver_lock);
4337
4338 ibmvfc_send_crq_init(vhost);
4339 scsi_scan_host(shost);
4340 return 0;
4341
4342remove_shost:
4343 scsi_remove_host(shost);
4344release_event_pool:
4345 ibmvfc_free_event_pool(vhost);
4346release_crq:
4347 ibmvfc_release_crq_queue(vhost);
4348kill_kthread:
4349 kthread_stop(vhost->work_thread);
4350free_host_mem:
4351 ibmvfc_free_mem(vhost);
4352free_scsi_host:
4353 scsi_host_put(shost);
4354out:
4355 LEAVE;
4356 return rc;
4357}
4358
4359/**
4360 * ibmvfc_remove - Adapter hot plug remove entry point
4361 * @vdev: vio device struct
4362 *
4363 * Return value:
4364 * 0
4365 **/
4366static int ibmvfc_remove(struct vio_dev *vdev)
4367{
4368 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4369 unsigned long flags;
4370
4371 ENTER;
4372 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
2d0da2a4
BK		 4373 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4374 ibmvfc_wait_while_resetting(vhost);
4375 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 4376 kthread_stop(vhost->work_thread);
4377 fc_remove_host(vhost->host);
4378 scsi_remove_host(vhost->host);
072b91f9
BK		 4379
4380 spin_lock_irqsave(vhost->host->host_lock, flags);
4381 ibmvfc_purge_requests(vhost, DID_ERROR);
4382 ibmvfc_free_event_pool(vhost);
4383 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4384
4385 ibmvfc_free_mem(vhost);
4386 spin_lock(&ibmvfc_driver_lock);
4387 list_del(&vhost->queue);
4388 spin_unlock(&ibmvfc_driver_lock);
4389 scsi_host_put(vhost->host);
4390 LEAVE;
4391 return 0;
4392}
4393
39c1ffec
BK		 4394/**
4395 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4396 * @vdev: vio device struct
4397 *
4398 * Return value:
4399 * Number of bytes the driver will need to DMA map at the same time in
4400 * order to perform well.
4401 */
4402static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4403{
4404 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4405 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4406}
4407
072b91f9
BK		 4408static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4409 {"fcp", "IBM,vfc-client"},
4410 { "", "" }
4411};
4412MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4413
4414static struct vio_driver ibmvfc_driver = {
4415 .id_table = ibmvfc_device_table,
4416 .probe = ibmvfc_probe,
4417 .remove = ibmvfc_remove,
39c1ffec 4418 .get_desired_dma = ibmvfc_get_desired_dma,
072b91f9
BK		 4419 .driver = {
4420 .name = IBMVFC_NAME,
4421 .owner = THIS_MODULE,
4422 }
4423};
4424
4425static struct fc_function_template ibmvfc_transport_functions = {
4426 .show_host_fabric_name = 1,
4427 .show_host_node_name = 1,
4428 .show_host_port_name = 1,
4429 .show_host_supported_classes = 1,
4430 .show_host_port_type = 1,
4431 .show_host_port_id = 1,
9ab3610f 4432 .show_host_maxframe_size = 1,
072b91f9
BK		 4433
4434 .get_host_port_state = ibmvfc_get_host_port_state,
4435 .show_host_port_state = 1,
4436
4437 .get_host_speed = ibmvfc_get_host_speed,
4438 .show_host_speed = 1,
4439
4440 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4441 .terminate_rport_io = ibmvfc_terminate_rport_io,
4442
4443 .show_rport_maxframe_size = 1,
4444 .show_rport_supported_classes = 1,
4445
4446 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4447 .show_rport_dev_loss_tmo = 1,
4448
4449 .get_starget_node_name = ibmvfc_get_starget_node_name,
4450 .show_starget_node_name = 1,
4451
4452 .get_starget_port_name = ibmvfc_get_starget_port_name,
4453 .show_starget_port_name = 1,
4454
4455 .get_starget_port_id = ibmvfc_get_starget_port_id,
4456 .show_starget_port_id = 1,
4457};
4458
4459/**
4460 * ibmvfc_module_init - Initialize the ibmvfc module
4461 *
4462 * Return value:
4463 * 0 on success / other on failure
4464 **/
4465static int __init ibmvfc_module_init(void)
4466{
4467 int rc;
4468
4469 if (!firmware_has_feature(FW_FEATURE_VIO))
4470 return -ENODEV;
4471
4472 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4473 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4474
4475 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4476 if (!ibmvfc_transport_template)
4477 return -ENOMEM;
4478
4479 rc = vio_register_driver(&ibmvfc_driver);
4480 if (rc)
4481 fc_release_transport(ibmvfc_transport_template);
4482 return rc;
4483}
4484
4485/**
4486 * ibmvfc_module_exit - Teardown the ibmvfc module
4487 *
4488 * Return value:
4489 * nothing
4490 **/
4491static void __exit ibmvfc_module_exit(void)
4492{
4493 vio_unregister_driver(&ibmvfc_driver);
4494 fc_release_transport(ibmvfc_transport_template);
4495}
4496
4497module_init(ibmvfc_module_init);
4498module_exit(ibmvfc_module_exit);
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