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[SCSI] ibmvfc: Fix target initialization failure retry handling
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / ibmvscsi / ibmvfc.c
CommitLineData
072b91f9
BK		 1/*
2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
3 *
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
5 *
6 * Copyright (C) IBM Corporation, 2008
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/dma-mapping.h>
27#include <linux/dmapool.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/kthread.h>
31#include <linux/of.h>
32#include <linux/stringify.h>
33#include <asm/firmware.h>
34#include <asm/irq.h>
35#include <asm/vio.h>
36#include <scsi/scsi.h>
37#include <scsi/scsi_cmnd.h>
38#include <scsi/scsi_host.h>
39#include <scsi/scsi_device.h>
40#include <scsi/scsi_tcq.h>
41#include <scsi/scsi_transport_fc.h>
42#include "ibmvfc.h"
43
44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
46static unsigned int max_lun = IBMVFC_MAX_LUN;
47static unsigned int max_targets = IBMVFC_MAX_TARGETS;
48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
51static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
53static LIST_HEAD(ibmvfc_head);
54static DEFINE_SPINLOCK(ibmvfc_driver_lock);
55static struct scsi_transport_template *ibmvfc_transport_template;
56
57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59MODULE_LICENSE("GPL");
60MODULE_VERSION(IBMVFC_DRIVER_VERSION);
61
62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
66MODULE_PARM_DESC(default_timeout,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
69module_param_named(max_requests, max_requests, uint, S_IRUGO);
70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
72module_param_named(max_lun, max_lun, uint, S_IRUGO);
73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
75module_param_named(max_targets, max_targets, uint, S_IRUGO);
76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
78module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR);
79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
82MODULE_PARM_DESC(debug, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG) "]");
84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
89module_param_named(log_level, log_level, uint, 0);
90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
92
93static const struct {
94 u16 status;
95 u16 error;
96 u8 result;
97 u8 retry;
98 int log;
99 char *name;
100} cmd_status [] = {
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
115
116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" },
123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
125
126 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
130 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
131 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
132 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
134 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
135 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
136 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
137
138 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
139};
140
141static void ibmvfc_npiv_login(struct ibmvfc_host *);
142static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
143static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
144static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
145
146static const char *unknown_error = "unknown error";
147
148#ifdef CONFIG_SCSI_IBMVFC_TRACE
149/**
150 * ibmvfc_trc_start - Log a start trace entry
151 * @evt: ibmvfc event struct
152 *
153 **/
154static void ibmvfc_trc_start(struct ibmvfc_event *evt)
155{
156 struct ibmvfc_host *vhost = evt->vhost;
157 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
158 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
159 struct ibmvfc_trace_entry *entry;
160
161 entry = &vhost->trace[vhost->trace_index++];
162 entry->evt = evt;
163 entry->time = jiffies;
164 entry->fmt = evt->crq.format;
165 entry->type = IBMVFC_TRC_START;
166
167 switch (entry->fmt) {
168 case IBMVFC_CMD_FORMAT:
169 entry->op_code = vfc_cmd->iu.cdb[0];
170 entry->scsi_id = vfc_cmd->tgt_scsi_id;
171 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
172 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
173 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
174 break;
175 case IBMVFC_MAD_FORMAT:
176 entry->op_code = mad->opcode;
177 break;
178 default:
179 break;
180 };
181}
182
183/**
184 * ibmvfc_trc_end - Log an end trace entry
185 * @evt: ibmvfc event struct
186 *
187 **/
188static void ibmvfc_trc_end(struct ibmvfc_event *evt)
189{
190 struct ibmvfc_host *vhost = evt->vhost;
191 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
192 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
193 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
194
195 entry->evt = evt;
196 entry->time = jiffies;
197 entry->fmt = evt->crq.format;
198 entry->type = IBMVFC_TRC_END;
199
200 switch (entry->fmt) {
201 case IBMVFC_CMD_FORMAT:
202 entry->op_code = vfc_cmd->iu.cdb[0];
203 entry->scsi_id = vfc_cmd->tgt_scsi_id;
204 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
205 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
206 entry->u.end.status = vfc_cmd->status;
207 entry->u.end.error = vfc_cmd->error;
208 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
209 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
210 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
211 break;
212 case IBMVFC_MAD_FORMAT:
213 entry->op_code = mad->opcode;
214 entry->u.end.status = mad->status;
215 break;
216 default:
217 break;
218
219 };
220}
221
222#else
223#define ibmvfc_trc_start(evt) do { } while (0)
224#define ibmvfc_trc_end(evt) do { } while (0)
225#endif
226
227/**
228 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
229 * @status: status / error class
230 * @error: error
231 *
232 * Return value:
233 * index into cmd_status / -EINVAL on failure
234 **/
235static int ibmvfc_get_err_index(u16 status, u16 error)
236{
237 int i;
238
239 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
240 if ((cmd_status[i].status & status) == cmd_status[i].status &&
241 cmd_status[i].error == error)
242 return i;
243
244 return -EINVAL;
245}
246
247/**
248 * ibmvfc_get_cmd_error - Find the error description for the fcp response
249 * @status: status / error class
250 * @error: error
251 *
252 * Return value:
253 * error description string
254 **/
255static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
256{
257 int rc = ibmvfc_get_err_index(status, error);
258 if (rc >= 0)
259 return cmd_status[rc].name;
260 return unknown_error;
261}
262
263/**
264 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
265 * @vfc_cmd: ibmvfc command struct
266 *
267 * Return value:
268 * SCSI result value to return for completed command
269 **/
270static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
271{
272 int err;
273 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
274 int fc_rsp_len = rsp->fcp_rsp_len;
275
276 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
277 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
278 rsp->data.info.rsp_code))
279 return DID_ERROR << 16;
280
072b91f9
BK		 281 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
282 if (err >= 0)
283 return rsp->scsi_status | (cmd_status[err].result << 16);
284 return rsp->scsi_status | (DID_ERROR << 16);
285}
286
287/**
288 * ibmvfc_retry_cmd - Determine if error status is retryable
289 * @status: status / error class
290 * @error: error
291 *
292 * Return value:
293 * 1 if error should be retried / 0 if it should not
294 **/
295static int ibmvfc_retry_cmd(u16 status, u16 error)
296{
297 int rc = ibmvfc_get_err_index(status, error);
298
299 if (rc >= 0)
300 return cmd_status[rc].retry;
301 return 1;
302}
303
304static const char *unknown_fc_explain = "unknown fc explain";
305
306static const struct {
307 u16 fc_explain;
308 char *name;
309} ls_explain [] = {
310 { 0x00, "no additional explanation" },
311 { 0x01, "service parameter error - options" },
312 { 0x03, "service parameter error - initiator control" },
313 { 0x05, "service parameter error - recipient control" },
314 { 0x07, "service parameter error - received data field size" },
315 { 0x09, "service parameter error - concurrent seq" },
316 { 0x0B, "service parameter error - credit" },
317 { 0x0D, "invalid N_Port/F_Port_Name" },
318 { 0x0E, "invalid node/Fabric Name" },
319 { 0x0F, "invalid common service parameters" },
320 { 0x11, "invalid association header" },
321 { 0x13, "association header required" },
322 { 0x15, "invalid originator S_ID" },
323 { 0x17, "invalid OX_ID-RX-ID combination" },
324 { 0x19, "command (request) already in progress" },
325 { 0x1E, "N_Port Login requested" },
326 { 0x1F, "Invalid N_Port_ID" },
327};
328
329static const struct {
330 u16 fc_explain;
331 char *name;
332} gs_explain [] = {
333 { 0x00, "no additional explanation" },
334 { 0x01, "port identifier not registered" },
335 { 0x02, "port name not registered" },
336 { 0x03, "node name not registered" },
337 { 0x04, "class of service not registered" },
338 { 0x06, "initial process associator not registered" },
339 { 0x07, "FC-4 TYPEs not registered" },
340 { 0x08, "symbolic port name not registered" },
341 { 0x09, "symbolic node name not registered" },
342 { 0x0A, "port type not registered" },
343 { 0xF0, "authorization exception" },
344 { 0xF1, "authentication exception" },
345 { 0xF2, "data base full" },
346 { 0xF3, "data base empty" },
347 { 0xF4, "processing request" },
348 { 0xF5, "unable to verify connection" },
349 { 0xF6, "devices not in a common zone" },
350};
351
352/**
353 * ibmvfc_get_ls_explain - Return the FC Explain description text
354 * @status: FC Explain status
355 *
356 * Returns:
357 * error string
358 **/
359static const char *ibmvfc_get_ls_explain(u16 status)
360{
361 int i;
362
363 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
364 if (ls_explain[i].fc_explain == status)
365 return ls_explain[i].name;
366
367 return unknown_fc_explain;
368}
369
370/**
371 * ibmvfc_get_gs_explain - Return the FC Explain description text
372 * @status: FC Explain status
373 *
374 * Returns:
375 * error string
376 **/
377static const char *ibmvfc_get_gs_explain(u16 status)
378{
379 int i;
380
381 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
382 if (gs_explain[i].fc_explain == status)
383 return gs_explain[i].name;
384
385 return unknown_fc_explain;
386}
387
388static const struct {
389 enum ibmvfc_fc_type fc_type;
390 char *name;
391} fc_type [] = {
392 { IBMVFC_FABRIC_REJECT, "fabric reject" },
393 { IBMVFC_PORT_REJECT, "port reject" },
394 { IBMVFC_LS_REJECT, "ELS reject" },
395 { IBMVFC_FABRIC_BUSY, "fabric busy" },
396 { IBMVFC_PORT_BUSY, "port busy" },
397 { IBMVFC_BASIC_REJECT, "basic reject" },
398};
399
400static const char *unknown_fc_type = "unknown fc type";
401
402/**
403 * ibmvfc_get_fc_type - Return the FC Type description text
404 * @status: FC Type error status
405 *
406 * Returns:
407 * error string
408 **/
409static const char *ibmvfc_get_fc_type(u16 status)
410{
411 int i;
412
413 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
414 if (fc_type[i].fc_type == status)
415 return fc_type[i].name;
416
417 return unknown_fc_type;
418}
419
420/**
421 * ibmvfc_set_tgt_action - Set the next init action for the target
422 * @tgt: ibmvfc target struct
423 * @action: action to perform
424 *
425 **/
426static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
427 enum ibmvfc_target_action action)
428{
429 switch (tgt->action) {
430 case IBMVFC_TGT_ACTION_DEL_RPORT:
431 break;
432 default:
433 tgt->action = action;
434 break;
435 }
436}
437
438/**
439 * ibmvfc_set_host_state - Set the state for the host
440 * @vhost: ibmvfc host struct
441 * @state: state to set host to
442 *
443 * Returns:
444 * 0 if state changed / non-zero if not changed
445 **/
446static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
447 enum ibmvfc_host_state state)
448{
449 int rc = 0;
450
451 switch (vhost->state) {
452 case IBMVFC_HOST_OFFLINE:
453 rc = -EINVAL;
454 break;
455 default:
456 vhost->state = state;
457 break;
458 };
459
460 return rc;
461}
462
463/**
464 * ibmvfc_set_host_action - Set the next init action for the host
465 * @vhost: ibmvfc host struct
466 * @action: action to perform
467 *
468 **/
469static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
470 enum ibmvfc_host_action action)
471{
472 switch (action) {
473 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
474 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
475 vhost->action = action;
476 break;
477 case IBMVFC_HOST_ACTION_INIT_WAIT:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
479 vhost->action = action;
480 break;
481 case IBMVFC_HOST_ACTION_QUERY:
482 switch (vhost->action) {
483 case IBMVFC_HOST_ACTION_INIT_WAIT:
484 case IBMVFC_HOST_ACTION_NONE:
485 case IBMVFC_HOST_ACTION_TGT_ADD:
486 vhost->action = action;
487 break;
488 default:
489 break;
490 };
491 break;
492 case IBMVFC_HOST_ACTION_TGT_INIT:
493 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
494 vhost->action = action;
495 break;
496 case IBMVFC_HOST_ACTION_INIT:
497 case IBMVFC_HOST_ACTION_TGT_DEL:
498 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 499 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 500 case IBMVFC_HOST_ACTION_TGT_ADD:
501 case IBMVFC_HOST_ACTION_NONE:
502 default:
503 vhost->action = action;
504 break;
505 };
506}
507
508/**
509 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
510 * @vhost: ibmvfc host struct
511 *
512 * Return value:
513 * nothing
514 **/
515static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
516{
517 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 518 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
519 scsi_block_requests(vhost->host);
520 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
521 }
072b91f9
BK		 522 } else
523 vhost->reinit = 1;
524
525 wake_up(&vhost->work_wait_q);
526}
527
528/**
529 * ibmvfc_link_down - Handle a link down event from the adapter
530 * @vhost: ibmvfc host struct
531 * @state: ibmvfc host state to enter
532 *
533 **/
534static void ibmvfc_link_down(struct ibmvfc_host *vhost,
535 enum ibmvfc_host_state state)
536{
537 struct ibmvfc_target *tgt;
538
539 ENTER;
540 scsi_block_requests(vhost->host);
541 list_for_each_entry(tgt, &vhost->targets, queue)
542 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
543 ibmvfc_set_host_state(vhost, state);
544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
545 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
546 wake_up(&vhost->work_wait_q);
547 LEAVE;
548}
549
550/**
551 * ibmvfc_init_host - Start host initialization
552 * @vhost: ibmvfc host struct
cf6f10d7 553 * @relogin: is this a re-login?
072b91f9
BK		 554 *
555 * Return value:
556 * nothing
557 **/
cf6f10d7 558static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
072b91f9
BK		 559{
560 struct ibmvfc_target *tgt;
561
562 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
563 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
564 dev_err(vhost->dev,
565 "Host initialization retries exceeded. Taking adapter offline\n");
566 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
567 return;
568 }
569 }
570
571 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
cf6f10d7
BK		 572 if (!relogin) {
573 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
574 vhost->async_crq.cur = 0;
575 }
576
072b91f9
BK		 577 list_for_each_entry(tgt, &vhost->targets, queue)
578 tgt->need_login = 1;
579 scsi_block_requests(vhost->host);
580 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
581 vhost->job_step = ibmvfc_npiv_login;
582 wake_up(&vhost->work_wait_q);
583 }
584}
585
586/**
587 * ibmvfc_send_crq - Send a CRQ
588 * @vhost: ibmvfc host struct
589 * @word1: the first 64 bits of the data
590 * @word2: the second 64 bits of the data
591 *
592 * Return value:
593 * 0 on success / other on failure
594 **/
595static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
596{
597 struct vio_dev *vdev = to_vio_dev(vhost->dev);
598 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
599}
600
601/**
602 * ibmvfc_send_crq_init - Send a CRQ init message
603 * @vhost: ibmvfc host struct
604 *
605 * Return value:
606 * 0 on success / other on failure
607 **/
608static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
609{
610 ibmvfc_dbg(vhost, "Sending CRQ init\n");
611 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
612}
613
614/**
615 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
616 * @vhost: ibmvfc host struct
617 *
618 * Return value:
619 * 0 on success / other on failure
620 **/
621static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
622{
623 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
624 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
625}
626
627/**
628 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
629 * @vhost: ibmvfc host struct
630 *
631 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
632 * the crq with the hypervisor.
633 **/
634static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
635{
636 long rc;
637 struct vio_dev *vdev = to_vio_dev(vhost->dev);
638 struct ibmvfc_crq_queue *crq = &vhost->crq;
639
640 ibmvfc_dbg(vhost, "Releasing CRQ\n");
641 free_irq(vdev->irq, vhost);
642 do {
643 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
644 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
645
646 vhost->state = IBMVFC_NO_CRQ;
647 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
648 free_page((unsigned long)crq->msgs);
649}
650
651/**
652 * ibmvfc_reenable_crq_queue - reenables the CRQ
653 * @vhost: ibmvfc host struct
654 *
655 * Return value:
656 * 0 on success / other on failure
657 **/
658static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
659{
660 int rc;
661 struct vio_dev *vdev = to_vio_dev(vhost->dev);
662
663 /* Re-enable the CRQ */
664 do {
665 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
666 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
667
668 if (rc)
669 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
670
671 return rc;
672}
673
674/**
675 * ibmvfc_reset_crq - resets a crq after a failure
676 * @vhost: ibmvfc host struct
677 *
678 * Return value:
679 * 0 on success / other on failure
680 **/
681static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
682{
683 int rc;
684 struct vio_dev *vdev = to_vio_dev(vhost->dev);
685 struct ibmvfc_crq_queue *crq = &vhost->crq;
686
687 /* Close the CRQ */
688 do {
689 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
690 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
691
692 vhost->state = IBMVFC_NO_CRQ;
693 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
694
695 /* Clean out the queue */
696 memset(crq->msgs, 0, PAGE_SIZE);
697 crq->cur = 0;
698
699 /* And re-open it again */
700 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
701 crq->msg_token, PAGE_SIZE);
702
703 if (rc == H_CLOSED)
704 /* Adapter is good, but other end is not ready */
705 dev_warn(vhost->dev, "Partner adapter not ready\n");
706 else if (rc != 0)
707 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
708
709 return rc;
710}
711
712/**
713 * ibmvfc_valid_event - Determines if event is valid.
714 * @pool: event_pool that contains the event
715 * @evt: ibmvfc event to be checked for validity
716 *
717 * Return value:
718 * 1 if event is valid / 0 if event is not valid
719 **/
720static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
721 struct ibmvfc_event *evt)
722{
723 int index = evt - pool->events;
724 if (index < 0 || index >= pool->size) /* outside of bounds */
725 return 0;
726 if (evt != pool->events + index) /* unaligned */
727 return 0;
728 return 1;
729}
730
731/**
732 * ibmvfc_free_event - Free the specified event
733 * @evt: ibmvfc_event to be freed
734 *
735 **/
736static void ibmvfc_free_event(struct ibmvfc_event *evt)
737{
738 struct ibmvfc_host *vhost = evt->vhost;
739 struct ibmvfc_event_pool *pool = &vhost->pool;
740
741 BUG_ON(!ibmvfc_valid_event(pool, evt));
742 BUG_ON(atomic_inc_return(&evt->free) != 1);
743 list_add_tail(&evt->queue, &vhost->free);
744}
745
746/**
747 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
748 * @evt: ibmvfc event struct
749 *
750 * This function does not setup any error status, that must be done
751 * before this function gets called.
752 **/
753static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
754{
755 struct scsi_cmnd *cmnd = evt->cmnd;
756
757 if (cmnd) {
758 scsi_dma_unmap(cmnd);
759 cmnd->scsi_done(cmnd);
760 }
761
ad8dcffa
BK		 762 if (evt->eh_comp)
763 complete(evt->eh_comp);
764
072b91f9
BK		 765 ibmvfc_free_event(evt);
766}
767
768/**
769 * ibmvfc_fail_request - Fail request with specified error code
770 * @evt: ibmvfc event struct
771 * @error_code: error code to fail request with
772 *
773 * Return value:
774 * none
775 **/
776static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
777{
778 if (evt->cmnd) {
779 evt->cmnd->result = (error_code << 16);
780 evt->done = ibmvfc_scsi_eh_done;
781 } else
782 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
783
784 list_del(&evt->queue);
785 del_timer(&evt->timer);
786 ibmvfc_trc_end(evt);
787 evt->done(evt);
788}
789
790/**
791 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
792 * @vhost: ibmvfc host struct
793 * @error_code: error code to fail requests with
794 *
795 * Return value:
796 * none
797 **/
798static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
799{
800 struct ibmvfc_event *evt, *pos;
801
802 ibmvfc_dbg(vhost, "Purging all requests\n");
803 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
804 ibmvfc_fail_request(evt, error_code);
805}
806
807/**
808 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
809 * @vhost: struct ibmvfc host to reset
810 **/
811static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
812{
813 int rc;
814
815 scsi_block_requests(vhost->host);
816 ibmvfc_purge_requests(vhost, DID_ERROR);
817 if ((rc = ibmvfc_reset_crq(vhost)) ||
818 (rc = ibmvfc_send_crq_init(vhost)) ||
819 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
820 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
821 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
822 } else
823 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
824}
825
826/**
827 * ibmvfc_reset_host - Reset the connection to the server
828 * @vhost: struct ibmvfc host to reset
829 **/
830static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
831{
832 unsigned long flags;
833
834 spin_lock_irqsave(vhost->host->host_lock, flags);
835 __ibmvfc_reset_host(vhost);
836 spin_unlock_irqrestore(vhost->host->host_lock, flags);
837}
838
839/**
840 * ibmvfc_retry_host_init - Retry host initialization if allowed
841 * @vhost: ibmvfc host struct
842 *
843 **/
844static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
845{
846 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
847 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) {
848 dev_err(vhost->dev,
849 "Host initialization retries exceeded. Taking adapter offline\n");
850 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
851 } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES)
852 __ibmvfc_reset_host(vhost);
853 else
854 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
855 }
856
857 wake_up(&vhost->work_wait_q);
858}
859
860/**
b3c10489 861 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 862 * @starget: scsi target struct
863 *
864 * Return value:
865 * ibmvfc_target struct / NULL if not found
866 **/
b3c10489 867static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 868{
869 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
870 struct ibmvfc_host *vhost = shost_priv(shost);
871 struct ibmvfc_target *tgt;
872
873 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 874 if (tgt->target_id == starget->id) {
875 kref_get(&tgt->kref);
072b91f9 876 return tgt;
b3c10489 877 }
072b91f9
BK		 878 return NULL;
879}
880
881/**
b3c10489 882 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 883 * @starget: scsi target struct
884 *
885 * Return value:
886 * ibmvfc_target struct / NULL if not found
887 **/
b3c10489 888static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 889{
890 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
891 struct ibmvfc_target *tgt;
892 unsigned long flags;
893
894 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 895 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 896 spin_unlock_irqrestore(shost->host_lock, flags);
897 return tgt;
898}
899
900/**
901 * ibmvfc_get_host_speed - Get host port speed
902 * @shost: scsi host struct
903 *
904 * Return value:
905 * none
906 **/
907static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
908{
909 struct ibmvfc_host *vhost = shost_priv(shost);
910 unsigned long flags;
911
912 spin_lock_irqsave(shost->host_lock, flags);
913 if (vhost->state == IBMVFC_ACTIVE) {
914 switch (vhost->login_buf->resp.link_speed / 100) {
915 case 1:
916 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
917 break;
918 case 2:
919 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
920 break;
921 case 4:
922 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
923 break;
924 case 8:
925 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
926 break;
927 case 10:
928 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
929 break;
930 case 16:
931 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
932 break;
933 default:
934 ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n",
935 vhost->login_buf->resp.link_speed / 100);
936 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
937 break;
938 }
939 } else
940 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
941 spin_unlock_irqrestore(shost->host_lock, flags);
942}
943
944/**
945 * ibmvfc_get_host_port_state - Get host port state
946 * @shost: scsi host struct
947 *
948 * Return value:
949 * none
950 **/
951static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
952{
953 struct ibmvfc_host *vhost = shost_priv(shost);
954 unsigned long flags;
955
956 spin_lock_irqsave(shost->host_lock, flags);
957 switch (vhost->state) {
958 case IBMVFC_INITIALIZING:
959 case IBMVFC_ACTIVE:
960 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
961 break;
962 case IBMVFC_LINK_DOWN:
963 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
964 break;
965 case IBMVFC_LINK_DEAD:
966 case IBMVFC_HOST_OFFLINE:
967 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
968 break;
969 case IBMVFC_HALTED:
970 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
971 break;
0ae808e0
BK		 972 case IBMVFC_NO_CRQ:
973 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
974 break;
072b91f9
BK		 975 default:
976 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
977 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
978 break;
979 }
980 spin_unlock_irqrestore(shost->host_lock, flags);
981}
982
983/**
984 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
985 * @rport: rport struct
986 * @timeout: timeout value
987 *
988 * Return value:
989 * none
990 **/
991static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
992{
993 if (timeout)
994 rport->dev_loss_tmo = timeout;
995 else
996 rport->dev_loss_tmo = 1;
997}
998
b3c10489
BK		 999/**
1000 * ibmvfc_release_tgt - Free memory allocated for a target
1001 * @kref: kref struct
1002 *
1003 **/
1004static void ibmvfc_release_tgt(struct kref *kref)
1005{
1006 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1007 kfree(tgt);
1008}
1009
072b91f9
BK		 1010/**
1011 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1012 * @starget: scsi target struct
1013 *
1014 * Return value:
1015 * none
1016 **/
1017static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1018{
b3c10489 1019 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1020 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1021 if (tgt)
1022 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1023}
1024
1025/**
1026 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1027 * @starget: scsi target struct
1028 *
1029 * Return value:
1030 * none
1031 **/
1032static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1033{
b3c10489 1034 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1035 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1036 if (tgt)
1037 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1038}
1039
1040/**
1041 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1042 * @starget: scsi target struct
1043 *
1044 * Return value:
1045 * none
1046 **/
1047static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1048{
b3c10489 1049 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1050 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1051 if (tgt)
1052 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1053}
1054
1055/**
1056 * ibmvfc_wait_while_resetting - Wait while the host resets
1057 * @vhost: ibmvfc host struct
1058 *
1059 * Return value:
1060 * 0 on success / other on failure
1061 **/
1062static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1063{
1064 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1065 ((vhost->state == IBMVFC_ACTIVE ||
1066 vhost->state == IBMVFC_HOST_OFFLINE ||
1067 vhost->state == IBMVFC_LINK_DEAD) &&
1068 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1069 (init_timeout * HZ));
1070
1071 return timeout ? 0 : -EIO;
1072}
1073
1074/**
1075 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1076 * @shost: scsi host struct
1077 *
1078 * Return value:
1079 * 0 on success / other on failure
1080 **/
1081static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1082{
1083 struct ibmvfc_host *vhost = shost_priv(shost);
1084
1085 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1086 ibmvfc_reset_host(vhost);
1087 return ibmvfc_wait_while_resetting(vhost);
1088}
1089
1090/**
1091 * ibmvfc_gather_partition_info - Gather info about the LPAR
1092 *
1093 * Return value:
1094 * none
1095 **/
1096static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1097{
1098 struct device_node *rootdn;
1099 const char *name;
1100 const unsigned int *num;
1101
1102 rootdn = of_find_node_by_path("/");
1103 if (!rootdn)
1104 return;
1105
1106 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1107 if (name)
1108 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1109 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1110 if (num)
1111 vhost->partition_number = *num;
1112 of_node_put(rootdn);
1113}
1114
1115/**
1116 * ibmvfc_set_login_info - Setup info for NPIV login
1117 * @vhost: ibmvfc host struct
1118 *
1119 * Return value:
1120 * none
1121 **/
1122static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1123{
1124 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1125 struct device_node *of_node = vhost->dev->archdata.of_node;
1126 const char *location;
1127
1128 memset(login_info, 0, sizeof(*login_info));
1129
1130 login_info->ostype = IBMVFC_OS_LINUX;
1131 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1132 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1133 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1134 login_info->partition_num = vhost->partition_number;
1135 login_info->vfc_frame_version = 1;
1136 login_info->fcp_version = 3;
1137 if (vhost->client_migrated)
1138 login_info->flags = IBMVFC_CLIENT_MIGRATED;
1139
1140 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1141 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1142 login_info->async.va = vhost->async_crq.msg_token;
52d7e861 1143 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
072b91f9
BK		 1144 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1145 strncpy(login_info->device_name,
1146 vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME);
1147
1148 location = of_get_property(of_node, "ibm,loc-code", NULL);
1149 location = location ? location : vhost->dev->bus_id;
1150 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1151}
1152
1153/**
1154 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1155 * @vhost: ibmvfc host who owns the event pool
1156 *
1157 * Returns zero on success.
1158 **/
1159static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1160{
1161 int i;
1162 struct ibmvfc_event_pool *pool = &vhost->pool;
1163
1164 ENTER;
1165 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1166 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1167 if (!pool->events)
1168 return -ENOMEM;
1169
1170 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1171 pool->size * sizeof(*pool->iu_storage),
1172 &pool->iu_token, 0);
1173
1174 if (!pool->iu_storage) {
1175 kfree(pool->events);
1176 return -ENOMEM;
1177 }
1178
1179 for (i = 0; i < pool->size; ++i) {
1180 struct ibmvfc_event *evt = &pool->events[i];
1181 atomic_set(&evt->free, 1);
1182 evt->crq.valid = 0x80;
1183 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1184 evt->xfer_iu = pool->iu_storage + i;
1185 evt->vhost = vhost;
1186 evt->ext_list = NULL;
1187 list_add_tail(&evt->queue, &vhost->free);
1188 }
1189
1190 LEAVE;
1191 return 0;
1192}
1193
1194/**
1195 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1196 * @vhost: ibmvfc host who owns the event pool
1197 *
1198 **/
1199static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1200{
1201 int i;
1202 struct ibmvfc_event_pool *pool = &vhost->pool;
1203
1204 ENTER;
1205 for (i = 0; i < pool->size; ++i) {
1206 list_del(&pool->events[i].queue);
1207 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1208 if (pool->events[i].ext_list)
1209 dma_pool_free(vhost->sg_pool,
1210 pool->events[i].ext_list,
1211 pool->events[i].ext_list_token);
1212 }
1213
1214 kfree(pool->events);
1215 dma_free_coherent(vhost->dev,
1216 pool->size * sizeof(*pool->iu_storage),
1217 pool->iu_storage, pool->iu_token);
1218 LEAVE;
1219}
1220
1221/**
1222 * ibmvfc_get_event - Gets the next free event in pool
1223 * @vhost: ibmvfc host struct
1224 *
1225 * Returns a free event from the pool.
1226 **/
1227static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1228{
1229 struct ibmvfc_event *evt;
1230
1231 BUG_ON(list_empty(&vhost->free));
1232 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1233 atomic_set(&evt->free, 0);
1234 list_del(&evt->queue);
1235 return evt;
1236}
1237
1238/**
1239 * ibmvfc_init_event - Initialize fields in an event struct that are always
1240 * required.
1241 * @evt: The event
1242 * @done: Routine to call when the event is responded to
1243 * @format: SRP or MAD format
1244 **/
1245static void ibmvfc_init_event(struct ibmvfc_event *evt,
1246 void (*done) (struct ibmvfc_event *), u8 format)
1247{
1248 evt->cmnd = NULL;
1249 evt->sync_iu = NULL;
1250 evt->crq.format = format;
1251 evt->done = done;
ad8dcffa 1252 evt->eh_comp = NULL;
072b91f9
BK		 1253}
1254
1255/**
1256 * ibmvfc_map_sg_list - Initialize scatterlist
1257 * @scmd: scsi command struct
1258 * @nseg: number of scatterlist segments
1259 * @md: memory descriptor list to initialize
1260 **/
1261static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1262 struct srp_direct_buf *md)
1263{
1264 int i;
1265 struct scatterlist *sg;
1266
1267 scsi_for_each_sg(scmd, sg, nseg, i) {
1268 md[i].va = sg_dma_address(sg);
1269 md[i].len = sg_dma_len(sg);
1270 md[i].key = 0;
1271 }
1272}
1273
1274/**
1275 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1276 * @scmd: Scsi_Cmnd with the scatterlist
1277 * @evt: ibmvfc event struct
1278 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1279 * @dev: device for which to map dma memory
1280 *
1281 * Returns:
1282 * 0 on success / non-zero on failure
1283 **/
1284static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1285 struct ibmvfc_event *evt,
1286 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1287{
1288
1289 int sg_mapped;
1290 struct srp_direct_buf *data = &vfc_cmd->ioba;
1291 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1292
1293 sg_mapped = scsi_dma_map(scmd);
1294 if (!sg_mapped) {
1295 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1296 return 0;
1297 } else if (unlikely(sg_mapped < 0)) {
1298 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1299 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1300 return sg_mapped;
1301 }
1302
1303 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1304 vfc_cmd->flags |= IBMVFC_WRITE;
1305 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1306 } else {
1307 vfc_cmd->flags |= IBMVFC_READ;
1308 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1309 }
1310
1311 if (sg_mapped == 1) {
1312 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1313 return 0;
1314 }
1315
1316 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1317
1318 if (!evt->ext_list) {
1319 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1320 &evt->ext_list_token);
1321
1322 if (!evt->ext_list) {
1323 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1324 return -ENOMEM;
1325 }
1326 }
1327
1328 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1329
1330 data->va = evt->ext_list_token;
1331 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1332 data->key = 0;
1333 return 0;
1334}
1335
1336/**
1337 * ibmvfc_timeout - Internal command timeout handler
1338 * @evt: struct ibmvfc_event that timed out
1339 *
1340 * Called when an internally generated command times out
1341 **/
1342static void ibmvfc_timeout(struct ibmvfc_event *evt)
1343{
1344 struct ibmvfc_host *vhost = evt->vhost;
1345 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1346 ibmvfc_reset_host(vhost);
1347}
1348
1349/**
1350 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1351 * @evt: event to be sent
1352 * @vhost: ibmvfc host struct
1353 * @timeout: timeout in seconds - 0 means do not time command
1354 *
1355 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1356 **/
1357static int ibmvfc_send_event(struct ibmvfc_event *evt,
1358 struct ibmvfc_host *vhost, unsigned long timeout)
1359{
1360 u64 *crq_as_u64 = (u64 *) &evt->crq;
1361 int rc;
1362
1363 /* Copy the IU into the transfer area */
1364 *evt->xfer_iu = evt->iu;
1365 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1366 evt->xfer_iu->cmd.tag = (u64)evt;
1367 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1368 evt->xfer_iu->mad_common.tag = (u64)evt;
1369 else
1370 BUG();
1371
1372 list_add_tail(&evt->queue, &vhost->sent);
1373 init_timer(&evt->timer);
1374
1375 if (timeout) {
1376 evt->timer.data = (unsigned long) evt;
1377 evt->timer.expires = jiffies + (timeout * HZ);
1378 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1379 add_timer(&evt->timer);
1380 }
1381
1382 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1383 list_del(&evt->queue);
1384 del_timer(&evt->timer);
1385
1386 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1387 * Firmware will send a CRQ with a transport event (0xFF) to
1388 * tell this client what has happened to the transport. This
1389 * will be handled in ibmvfc_handle_crq()
1390 */
1391 if (rc == H_CLOSED) {
1392 if (printk_ratelimit())
1393 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1394 if (evt->cmnd)
1395 scsi_dma_unmap(evt->cmnd);
1396 ibmvfc_free_event(evt);
1397 return SCSI_MLQUEUE_HOST_BUSY;
1398 }
1399
1400 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1401 if (evt->cmnd) {
1402 evt->cmnd->result = DID_ERROR << 16;
1403 evt->done = ibmvfc_scsi_eh_done;
1404 } else
1405 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1406
1407 evt->done(evt);
1408 } else
1409 ibmvfc_trc_start(evt);
1410
1411 return 0;
1412}
1413
1414/**
1415 * ibmvfc_log_error - Log an error for the failed command if appropriate
1416 * @evt: ibmvfc event to log
1417 *
1418 **/
1419static void ibmvfc_log_error(struct ibmvfc_event *evt)
1420{
1421 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1422 struct ibmvfc_host *vhost = evt->vhost;
1423 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1424 struct scsi_cmnd *cmnd = evt->cmnd;
1425 const char *err = unknown_error;
1426 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1427 int logerr = 0;
1428 int rsp_code = 0;
1429
1430 if (index >= 0) {
1431 logerr = cmd_status[index].log;
1432 err = cmd_status[index].name;
1433 }
1434
0ae808e0 1435 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1436 return;
1437
1438 if (rsp->flags & FCP_RSP_LEN_VALID)
1439 rsp_code = rsp->data.info.rsp_code;
1440
1441 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1442 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1443 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1444 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1445}
1446
1447/**
1448 * ibmvfc_scsi_done - Handle responses from commands
1449 * @evt: ibmvfc event to be handled
1450 *
1451 * Used as a callback when sending scsi cmds.
1452 **/
1453static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1454{
1455 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1456 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1457 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d
BK		 1458 u32 rsp_len = 0;
1459 u32 sense_len = rsp->fcp_sense_len;
072b91f9
BK		 1460
1461 if (cmnd) {
1462 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1463 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1464 else if (rsp->flags & FCP_RESID_UNDER)
1465 scsi_set_resid(cmnd, rsp->fcp_resid);
1466 else
1467 scsi_set_resid(cmnd, 0);
1468
1469 if (vfc_cmd->status) {
1470 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1471
1472 if (rsp->flags & FCP_RSP_LEN_VALID)
1473 rsp_len = rsp->fcp_rsp_len;
1474 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1475 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1476 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9
BK		 1477 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1478
50119dad
BK		 1479 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1480 cmnd->result = (DID_ERROR << 16);
1481
072b91f9
BK		 1482 ibmvfc_log_error(evt);
1483 }
1484
1485 if (!cmnd->result &&
1486 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1487 cmnd->result = (DID_ERROR << 16);
1488
1489 scsi_dma_unmap(cmnd);
1490 cmnd->scsi_done(cmnd);
1491 }
1492
ad8dcffa
BK		 1493 if (evt->eh_comp)
1494 complete(evt->eh_comp);
1495
072b91f9
BK		 1496 ibmvfc_free_event(evt);
1497}
1498
1499/**
1500 * ibmvfc_host_chkready - Check if the host can accept commands
1501 * @vhost: struct ibmvfc host
1502 *
1503 * Returns:
1504 * 1 if host can accept command / 0 if not
1505 **/
1506static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1507{
1508 int result = 0;
1509
1510 switch (vhost->state) {
1511 case IBMVFC_LINK_DEAD:
1512 case IBMVFC_HOST_OFFLINE:
1513 result = DID_NO_CONNECT << 16;
1514 break;
1515 case IBMVFC_NO_CRQ:
1516 case IBMVFC_INITIALIZING:
1517 case IBMVFC_HALTED:
1518 case IBMVFC_LINK_DOWN:
1519 result = DID_REQUEUE << 16;
1520 break;
1521 case IBMVFC_ACTIVE:
1522 result = 0;
1523 break;
1524 };
1525
1526 return result;
1527}
1528
1529/**
1530 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1531 * @cmnd: struct scsi_cmnd to be executed
1532 * @done: Callback function to be called when cmnd is completed
1533 *
1534 * Returns:
1535 * 0 on success / other on failure
1536 **/
1537static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1538 void (*done) (struct scsi_cmnd *))
1539{
1540 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1541 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1542 struct ibmvfc_cmd *vfc_cmd;
1543 struct ibmvfc_event *evt;
1544 u8 tag[2];
1545 int rc;
1546
1547 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1548 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1549 cmnd->result = rc;
1550 done(cmnd);
1551 return 0;
1552 }
1553
1554 cmnd->result = (DID_OK << 16);
1555 evt = ibmvfc_get_event(vhost);
1556 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1557 evt->cmnd = cmnd;
1558 cmnd->scsi_done = done;
1559 vfc_cmd = &evt->iu.cmd;
1560 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1561 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1562 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1563 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1564 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1565 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1566 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1567 vfc_cmd->tgt_scsi_id = rport->port_id;
1568 if ((rport->supported_classes & FC_COS_CLASS3) &&
1569 (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3))
1570 vfc_cmd->flags = IBMVFC_CLASS_3_ERR;
1571 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1572 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1573 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1574
1575 if (scsi_populate_tag_msg(cmnd, tag)) {
1576 vfc_cmd->task_tag = tag[1];
1577 switch (tag[0]) {
1578 case MSG_SIMPLE_TAG:
1579 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1580 break;
1581 case MSG_HEAD_TAG:
1582 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1583 break;
1584 case MSG_ORDERED_TAG:
1585 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1586 break;
1587 };
1588 }
1589
1590 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1591 return ibmvfc_send_event(evt, vhost, 0);
1592
1593 ibmvfc_free_event(evt);
1594 if (rc == -ENOMEM)
1595 return SCSI_MLQUEUE_HOST_BUSY;
1596
1597 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1598 scmd_printk(KERN_ERR, cmnd,
1599 "Failed to map DMA buffer for command. rc=%d\n", rc);
1600
1601 cmnd->result = DID_ERROR << 16;
1602 done(cmnd);
1603 return 0;
1604}
1605
1606/**
1607 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1608 * @evt: ibmvfc event struct
1609 *
1610 **/
1611static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1612{
1613 /* copy the response back */
1614 if (evt->sync_iu)
1615 *evt->sync_iu = *evt->xfer_iu;
1616
1617 complete(&evt->comp);
1618}
1619
1620/**
1621 * ibmvfc_reset_device - Reset the device with the specified reset type
1622 * @sdev: scsi device to reset
1623 * @type: reset type
1624 * @desc: reset type description for log messages
1625 *
1626 * Returns:
1627 * 0 on success / other on failure
1628 **/
1629static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1630{
1631 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1632 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1633 struct ibmvfc_cmd *tmf;
1634 struct ibmvfc_event *evt;
1635 union ibmvfc_iu rsp_iu;
1636 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1637 int rsp_rc = -EBUSY;
1638 unsigned long flags;
1639 int rsp_code = 0;
1640
1641 spin_lock_irqsave(vhost->host->host_lock, flags);
1642 if (vhost->state == IBMVFC_ACTIVE) {
1643 evt = ibmvfc_get_event(vhost);
1644 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1645
1646 tmf = &evt->iu.cmd;
1647 memset(tmf, 0, sizeof(*tmf));
1648 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1649 tmf->resp.len = sizeof(tmf->rsp);
1650 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1651 tmf->payload_len = sizeof(tmf->iu);
1652 tmf->resp_len = sizeof(tmf->rsp);
1653 tmf->cancel_key = (unsigned long)sdev->hostdata;
1654 tmf->tgt_scsi_id = rport->port_id;
1655 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1656 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1657 tmf->iu.tmf_flags = type;
1658 evt->sync_iu = &rsp_iu;
1659
1660 init_completion(&evt->comp);
1661 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1662 }
1663 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1664
1665 if (rsp_rc != 0) {
1666 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1667 desc, rsp_rc);
1668 return -EIO;
1669 }
1670
1671 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1672 wait_for_completion(&evt->comp);
1673
1674 if (rsp_iu.cmd.status) {
1675 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1676 rsp_code = fc_rsp->data.info.rsp_code;
1677
1678 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1679 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1680 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1681 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1682 fc_rsp->scsi_status);
1683 rsp_rc = -EIO;
1684 } else
1685 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1686
1687 spin_lock_irqsave(vhost->host->host_lock, flags);
1688 ibmvfc_free_event(evt);
1689 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1690 return rsp_rc;
1691}
1692
1693/**
1694 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1695 * @sdev: scsi device to abort commands
1696 *
1697 * This sends an Abort Task Set to the VIOS for the specified device. This does
1698 * NOT send any cancel to the VIOS. That must be done separately.
1699 *
1700 * Returns:
1701 * 0 on success / other on failure
1702 **/
1703static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1704{
1705 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1706 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1707 struct ibmvfc_cmd *tmf;
1708 struct ibmvfc_event *evt, *found_evt;
1709 union ibmvfc_iu rsp_iu;
1710 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1711 int rsp_rc = -EBUSY;
1712 unsigned long flags;
1713 int rsp_code = 0;
1714
1715 spin_lock_irqsave(vhost->host->host_lock, flags);
1716 found_evt = NULL;
1717 list_for_each_entry(evt, &vhost->sent, queue) {
1718 if (evt->cmnd && evt->cmnd->device == sdev) {
1719 found_evt = evt;
1720 break;
1721 }
1722 }
1723
1724 if (!found_evt) {
1725 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1726 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1727 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1728 return 0;
1729 }
1730
1731 if (vhost->state == IBMVFC_ACTIVE) {
1732 evt = ibmvfc_get_event(vhost);
1733 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1734
1735 tmf = &evt->iu.cmd;
1736 memset(tmf, 0, sizeof(*tmf));
1737 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1738 tmf->resp.len = sizeof(tmf->rsp);
1739 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1740 tmf->payload_len = sizeof(tmf->iu);
1741 tmf->resp_len = sizeof(tmf->rsp);
1742 tmf->cancel_key = (unsigned long)sdev->hostdata;
1743 tmf->tgt_scsi_id = rport->port_id;
1744 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1745 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1746 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1747 evt->sync_iu = &rsp_iu;
1748
1749 init_completion(&evt->comp);
1750 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1751 }
1752
1753 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1754
1755 if (rsp_rc != 0) {
1756 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1757 return -EIO;
1758 }
1759
1760 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1761 wait_for_completion(&evt->comp);
1762
1763 if (rsp_iu.cmd.status) {
1764 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1765 rsp_code = fc_rsp->data.info.rsp_code;
1766
1767 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1768 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1769 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1770 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1771 fc_rsp->scsi_status);
1772 rsp_rc = -EIO;
1773 } else
1774 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1775
1776 spin_lock_irqsave(vhost->host->host_lock, flags);
1777 ibmvfc_free_event(evt);
1778 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1779 return rsp_rc;
1780}
1781
1782/**
1783 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1784 * @sdev: scsi device to cancel commands
1785 * @type: type of error recovery being performed
1786 *
1787 * This sends a cancel to the VIOS for the specified device. This does
1788 * NOT send any abort to the actual device. That must be done separately.
1789 *
1790 * Returns:
1791 * 0 on success / other on failure
1792 **/
1793static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1794{
1795 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 1796 struct scsi_target *starget = scsi_target(sdev);
1797 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 1798 struct ibmvfc_tmf *tmf;
1799 struct ibmvfc_event *evt, *found_evt;
1800 union ibmvfc_iu rsp;
1801 int rsp_rc = -EBUSY;
1802 unsigned long flags;
1803 u16 status;
1804
1805 ENTER;
1806 spin_lock_irqsave(vhost->host->host_lock, flags);
1807 found_evt = NULL;
1808 list_for_each_entry(evt, &vhost->sent, queue) {
1809 if (evt->cmnd && evt->cmnd->device == sdev) {
1810 found_evt = evt;
1811 break;
1812 }
1813 }
1814
1815 if (!found_evt) {
1816 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1817 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1818 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1819 return 0;
1820 }
1821
1822 if (vhost->state == IBMVFC_ACTIVE) {
1823 evt = ibmvfc_get_event(vhost);
1824 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1825
1826 tmf = &evt->iu.tmf;
1827 memset(tmf, 0, sizeof(*tmf));
1828 tmf->common.version = 1;
1829 tmf->common.opcode = IBMVFC_TMF_MAD;
1830 tmf->common.length = sizeof(*tmf);
1831 tmf->scsi_id = rport->port_id;
1832 int_to_scsilun(sdev->lun, &tmf->lun);
1833 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1834 tmf->cancel_key = (unsigned long)sdev->hostdata;
ad8dcffa 1835 tmf->my_cancel_key = (unsigned long)starget->hostdata;
072b91f9
BK		 1836
1837 evt->sync_iu = &rsp;
1838 init_completion(&evt->comp);
1839 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1840 }
1841
1842 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1843
1844 if (rsp_rc != 0) {
1845 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1846 return -EIO;
1847 }
1848
1849 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1850
1851 wait_for_completion(&evt->comp);
1852 status = rsp.mad_common.status;
1853 spin_lock_irqsave(vhost->host->host_lock, flags);
1854 ibmvfc_free_event(evt);
1855 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1856
1857 if (status != IBMVFC_MAD_SUCCESS) {
1858 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1859 return -EIO;
1860 }
1861
1862 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1863 return 0;
1864}
1865
ad8dcffa
BK		 1866/**
1867 * ibmvfc_match_target - Match function for specified target
1868 * @evt: ibmvfc event struct
1869 * @device: device to match (starget)
1870 *
1871 * Returns:
1872 * 1 if event matches starget / 0 if event does not match starget
1873 **/
1874static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
1875{
1876 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
1877 return 1;
1878 return 0;
1879}
1880
1881/**
1882 * ibmvfc_match_lun - Match function for specified LUN
1883 * @evt: ibmvfc event struct
1884 * @device: device to match (sdev)
1885 *
1886 * Returns:
1887 * 1 if event matches sdev / 0 if event does not match sdev
1888 **/
1889static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
1890{
1891 if (evt->cmnd && evt->cmnd->device == device)
1892 return 1;
1893 return 0;
1894}
1895
1896/**
1897 * ibmvfc_wait_for_ops - Wait for ops to complete
1898 * @vhost: ibmvfc host struct
1899 * @device: device to match (starget or sdev)
1900 * @match: match function
1901 *
1902 * Returns:
1903 * SUCCESS / FAILED
1904 **/
1905static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
1906 int (*match) (struct ibmvfc_event *, void *))
1907{
1908 struct ibmvfc_event *evt;
1909 DECLARE_COMPLETION_ONSTACK(comp);
1910 int wait;
1911 unsigned long flags;
1912 signed long timeout = init_timeout * HZ;
1913
1914 ENTER;
1915 do {
1916 wait = 0;
1917 spin_lock_irqsave(vhost->host->host_lock, flags);
1918 list_for_each_entry(evt, &vhost->sent, queue) {
1919 if (match(evt, device)) {
1920 evt->eh_comp = &comp;
1921 wait++;
1922 }
1923 }
1924 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1925
1926 if (wait) {
1927 timeout = wait_for_completion_timeout(&comp, timeout);
1928
1929 if (!timeout) {
1930 wait = 0;
1931 spin_lock_irqsave(vhost->host->host_lock, flags);
1932 list_for_each_entry(evt, &vhost->sent, queue) {
1933 if (match(evt, device)) {
1934 evt->eh_comp = NULL;
1935 wait++;
1936 }
1937 }
1938 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1939 if (wait)
1940 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
1941 LEAVE;
1942 return wait ? FAILED : SUCCESS;
1943 }
1944 }
1945 } while (wait);
1946
1947 LEAVE;
1948 return SUCCESS;
1949}
1950
072b91f9
BK		 1951/**
1952 * ibmvfc_eh_abort_handler - Abort a command
1953 * @cmd: scsi command to abort
1954 *
1955 * Returns:
1956 * SUCCESS / FAILED
1957 **/
1958static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
1959{
ad8dcffa
BK		 1960 struct scsi_device *sdev = cmd->device;
1961 struct ibmvfc_host *vhost = shost_priv(sdev->host);
072b91f9 1962 int cancel_rc, abort_rc;
ad8dcffa 1963 int rc = FAILED;
072b91f9
BK		 1964
1965 ENTER;
1966 ibmvfc_wait_while_resetting(vhost);
ad8dcffa
BK		 1967 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
1968 abort_rc = ibmvfc_abort_task_set(sdev);
072b91f9 1969
ad8dcffa
BK		 1970 if (!cancel_rc && !abort_rc)
1971 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9
BK		 1972
1973 LEAVE;
ad8dcffa 1974 return rc;
072b91f9
BK		 1975}
1976
1977/**
1978 * ibmvfc_eh_device_reset_handler - Reset a single LUN
1979 * @cmd: scsi command struct
1980 *
1981 * Returns:
1982 * SUCCESS / FAILED
1983 **/
1984static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
1985{
ad8dcffa
BK		 1986 struct scsi_device *sdev = cmd->device;
1987 struct ibmvfc_host *vhost = shost_priv(sdev->host);
072b91f9 1988 int cancel_rc, reset_rc;
ad8dcffa 1989 int rc = FAILED;
072b91f9
BK		 1990
1991 ENTER;
1992 ibmvfc_wait_while_resetting(vhost);
ad8dcffa
BK		 1993 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
1994 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
072b91f9 1995
ad8dcffa
BK		 1996 if (!cancel_rc && !reset_rc)
1997 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9
BK		 1998
1999 LEAVE;
ad8dcffa 2000 return rc;
072b91f9
BK		 2001}
2002
2003/**
2004 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2005 * @sdev: scsi device struct
2006 * @data: return code
2007 *
2008 **/
2009static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
2010{
2011 unsigned long *rc = data;
2012 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2013}
2014
2015/**
2016 * ibmvfc_dev_abort_all - Device iterated abort task set function
2017 * @sdev: scsi device struct
2018 * @data: return code
2019 *
2020 **/
2021static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2022{
2023 unsigned long *rc = data;
2024 *rc |= ibmvfc_abort_task_set(sdev);
2025}
2026
2027/**
2028 * ibmvfc_eh_target_reset_handler - Reset the target
2029 * @cmd: scsi command struct
2030 *
2031 * Returns:
2032 * SUCCESS / FAILED
2033 **/
2034static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2035{
ad8dcffa
BK		 2036 struct scsi_device *sdev = cmd->device;
2037 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2038 struct scsi_target *starget = scsi_target(sdev);
072b91f9 2039 int reset_rc;
ad8dcffa 2040 int rc = FAILED;
072b91f9 2041 unsigned long cancel_rc = 0;
072b91f9
BK		 2042
2043 ENTER;
2044 ibmvfc_wait_while_resetting(vhost);
2045 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
ad8dcffa 2046 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
072b91f9 2047
ad8dcffa
BK		 2048 if (!cancel_rc && !reset_rc)
2049 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9
BK		 2050
2051 LEAVE;
ad8dcffa 2052 return rc;
072b91f9
BK		 2053}
2054
2055/**
2056 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2057 * @cmd: struct scsi_cmnd having problems
2058 *
2059 **/
2060static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2061{
2062 int rc;
2063 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2064
2065 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2066 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2067 return rc ? FAILED : SUCCESS;
2068}
2069
2070/**
2071 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2072 * @rport: rport struct
2073 *
2074 * Return value:
2075 * none
2076 **/
2077static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2078{
2079 struct scsi_target *starget = to_scsi_target(&rport->dev);
2080 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2081 struct ibmvfc_host *vhost = shost_priv(shost);
072b91f9
BK		 2082 unsigned long cancel_rc = 0;
2083 unsigned long abort_rc = 0;
ad8dcffa 2084 int rc = FAILED;
072b91f9
BK		 2085
2086 ENTER;
2087 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2088 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2089
ad8dcffa
BK		 2090 if (!cancel_rc && !abort_rc)
2091 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2092
2093 if (rc == FAILED)
072b91f9 2094 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2095 LEAVE;
2096}
2097
2098static const struct {
2099 enum ibmvfc_async_event ae;
2100 const char *desc;
2101} ae_desc [] = {
2102 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2103 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2104 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2105 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2106 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2107 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2108 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2109 { IBMVFC_AE_LINK_UP, "Link Up" },
2110 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2111 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2112 { IBMVFC_AE_HALT, "Halt" },
2113 { IBMVFC_AE_RESUME, "Resume" },
2114 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2115};
2116
2117static const char *unknown_ae = "Unknown async";
2118
2119/**
2120 * ibmvfc_get_ae_desc - Get text description for async event
2121 * @ae: async event
2122 *
2123 **/
2124static const char *ibmvfc_get_ae_desc(u64 ae)
2125{
2126 int i;
2127
2128 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2129 if (ae_desc[i].ae == ae)
2130 return ae_desc[i].desc;
2131
2132 return unknown_ae;
2133}
2134
2135/**
2136 * ibmvfc_handle_async - Handle an async event from the adapter
2137 * @crq: crq to process
2138 * @vhost: ibmvfc host struct
2139 *
2140 **/
2141static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2142 struct ibmvfc_host *vhost)
2143{
2144 const char *desc = ibmvfc_get_ae_desc(crq->event);
2145
3e339946
BK		 2146 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx,"
2147 " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
072b91f9
BK		 2148
2149 switch (crq->event) {
2150 case IBMVFC_AE_LINK_UP:
2151 case IBMVFC_AE_RESUME:
2152 vhost->events_to_log |= IBMVFC_AE_LINKUP;
cf6f10d7 2153 ibmvfc_init_host(vhost, 1);
072b91f9
BK		 2154 break;
2155 case IBMVFC_AE_SCN_FABRIC:
2156 vhost->events_to_log |= IBMVFC_AE_RSCN;
cf6f10d7 2157 ibmvfc_init_host(vhost, 1);
072b91f9
BK		 2158 break;
2159 case IBMVFC_AE_SCN_NPORT:
2160 case IBMVFC_AE_SCN_GROUP:
2161 case IBMVFC_AE_SCN_DOMAIN:
2162 vhost->events_to_log |= IBMVFC_AE_RSCN;
2163 case IBMVFC_AE_ELS_LOGO:
2164 case IBMVFC_AE_ELS_PRLO:
2165 case IBMVFC_AE_ELS_PLOGI:
2166 ibmvfc_reinit_host(vhost);
2167 break;
2168 case IBMVFC_AE_LINK_DOWN:
2169 case IBMVFC_AE_ADAPTER_FAILED:
2170 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2171 break;
2172 case IBMVFC_AE_LINK_DEAD:
2173 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2174 break;
2175 case IBMVFC_AE_HALT:
2176 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2177 break;
2178 default:
2179 dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event);
2180 break;
2181 };
2182}
2183
2184/**
2185 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2186 * @crq: Command/Response queue
2187 * @vhost: ibmvfc host struct
2188 *
2189 **/
2190static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2191{
2192 long rc;
2193 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2194
2195 switch (crq->valid) {
2196 case IBMVFC_CRQ_INIT_RSP:
2197 switch (crq->format) {
2198 case IBMVFC_CRQ_INIT:
2199 dev_info(vhost->dev, "Partner initialized\n");
2200 /* Send back a response */
2201 rc = ibmvfc_send_crq_init_complete(vhost);
2202 if (rc == 0)
cf6f10d7 2203 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2204 else
2205 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2206 break;
2207 case IBMVFC_CRQ_INIT_COMPLETE:
2208 dev_info(vhost->dev, "Partner initialization complete\n");
cf6f10d7 2209 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2210 break;
2211 default:
2212 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2213 }
2214 return;
2215 case IBMVFC_CRQ_XPORT_EVENT:
2216 vhost->state = IBMVFC_NO_CRQ;
2217 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2218 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2219 /* We need to re-setup the interpartition connection */
2220 dev_info(vhost->dev, "Re-enabling adapter\n");
2221 vhost->client_migrated = 1;
2222 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2223 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2224 (rc = ibmvfc_send_crq_init(vhost))) {
2225 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2226 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2227 } else
2228 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2229 } else {
2230 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2231
2232 ibmvfc_purge_requests(vhost, DID_ERROR);
2233 if ((rc = ibmvfc_reset_crq(vhost)) ||
2234 (rc = ibmvfc_send_crq_init(vhost))) {
2235 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2236 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2237 } else
2238 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2239 }
2240 return;
2241 case IBMVFC_CRQ_CMD_RSP:
2242 break;
2243 default:
2244 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2245 return;
2246 }
2247
2248 if (crq->format == IBMVFC_ASYNC_EVENT)
2249 return;
2250
2251 /* The only kind of payload CRQs we should get are responses to
2252 * things we send. Make sure this response is to something we
2253 * actually sent
2254 */
2255 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
2256 dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n",
2257 crq->ioba);
2258 return;
2259 }
2260
2261 if (unlikely(atomic_read(&evt->free))) {
2262 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n",
2263 crq->ioba);
2264 return;
2265 }
2266
2267 del_timer(&evt->timer);
2268 list_del(&evt->queue);
2269 ibmvfc_trc_end(evt);
2270 evt->done(evt);
2271}
2272
2273/**
2274 * ibmvfc_scan_finished - Check if the device scan is done.
2275 * @shost: scsi host struct
2276 * @time: current elapsed time
2277 *
2278 * Returns:
2279 * 0 if scan is not done / 1 if scan is done
2280 **/
2281static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2282{
2283 unsigned long flags;
2284 struct ibmvfc_host *vhost = shost_priv(shost);
2285 int done = 0;
2286
2287 spin_lock_irqsave(shost->host_lock, flags);
2288 if (time >= (init_timeout * HZ)) {
2289 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2290 "continuing initialization\n", init_timeout);
2291 done = 1;
2292 }
2293
2294 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE)
2295 done = 1;
2296 spin_unlock_irqrestore(shost->host_lock, flags);
2297 return done;
2298}
2299
2300/**
2301 * ibmvfc_slave_alloc - Setup the device's task set value
2302 * @sdev: struct scsi_device device to configure
2303 *
2304 * Set the device's task set value so that error handling works as
2305 * expected.
2306 *
2307 * Returns:
2308 * 0 on success / -ENXIO if device does not exist
2309 **/
2310static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2311{
2312 struct Scsi_Host *shost = sdev->host;
2313 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2314 struct ibmvfc_host *vhost = shost_priv(shost);
2315 unsigned long flags = 0;
2316
2317 if (!rport || fc_remote_port_chkready(rport))
2318 return -ENXIO;
2319
2320 spin_lock_irqsave(shost->host_lock, flags);
2321 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2322 spin_unlock_irqrestore(shost->host_lock, flags);
2323 return 0;
2324}
2325
ad8dcffa
BK		 2326/**
2327 * ibmvfc_target_alloc - Setup the target's task set value
2328 * @starget: struct scsi_target
2329 *
2330 * Set the target's task set value so that error handling works as
2331 * expected.
2332 *
2333 * Returns:
2334 * 0 on success / -ENXIO if device does not exist
2335 **/
2336static int ibmvfc_target_alloc(struct scsi_target *starget)
2337{
2338 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2339 struct ibmvfc_host *vhost = shost_priv(shost);
2340 unsigned long flags = 0;
2341
2342 spin_lock_irqsave(shost->host_lock, flags);
2343 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2344 spin_unlock_irqrestore(shost->host_lock, flags);
2345 return 0;
2346}
2347
072b91f9
BK		 2348/**
2349 * ibmvfc_slave_configure - Configure the device
2350 * @sdev: struct scsi_device device to configure
2351 *
2352 * Enable allow_restart for a device if it is a disk. Adjust the
2353 * queue_depth here also.
2354 *
2355 * Returns:
2356 * 0
2357 **/
2358static int ibmvfc_slave_configure(struct scsi_device *sdev)
2359{
2360 struct Scsi_Host *shost = sdev->host;
2361 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2362 unsigned long flags = 0;
2363
2364 spin_lock_irqsave(shost->host_lock, flags);
2365 if (sdev->type == TYPE_DISK)
2366 sdev->allow_restart = 1;
2367
2368 if (sdev->tagged_supported) {
2369 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2370 scsi_activate_tcq(sdev, sdev->queue_depth);
2371 } else
2372 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2373
2374 rport->dev_loss_tmo = dev_loss_tmo;
2375 spin_unlock_irqrestore(shost->host_lock, flags);
2376 return 0;
2377}
2378
2379/**
2380 * ibmvfc_change_queue_depth - Change the device's queue depth
2381 * @sdev: scsi device struct
2382 * @qdepth: depth to set
2383 *
2384 * Return value:
2385 * actual depth set
2386 **/
2387static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2388{
2389 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2390 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2391
2392 scsi_adjust_queue_depth(sdev, 0, qdepth);
2393 return sdev->queue_depth;
2394}
2395
2396/**
2397 * ibmvfc_change_queue_type - Change the device's queue type
2398 * @sdev: scsi device struct
2399 * @tag_type: type of tags to use
2400 *
2401 * Return value:
2402 * actual queue type set
2403 **/
2404static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2405{
2406 if (sdev->tagged_supported) {
2407 scsi_set_tag_type(sdev, tag_type);
2408
2409 if (tag_type)
2410 scsi_activate_tcq(sdev, sdev->queue_depth);
2411 else
2412 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2413 } else
2414 tag_type = 0;
2415
2416 return tag_type;
2417}
2418
2419static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2420 struct device_attribute *attr, char *buf)
2421{
2422 struct Scsi_Host *shost = class_to_shost(dev);
2423 struct ibmvfc_host *vhost = shost_priv(shost);
2424
2425 return snprintf(buf, PAGE_SIZE, "%s\n",
2426 vhost->login_buf->resp.partition_name);
2427}
2428
2429static struct device_attribute ibmvfc_host_partition_name = {
2430 .attr = {
2431 .name = "partition_name",
2432 .mode = S_IRUGO,
2433 },
2434 .show = ibmvfc_show_host_partition_name,
2435};
2436
2437static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2438 struct device_attribute *attr, char *buf)
2439{
2440 struct Scsi_Host *shost = class_to_shost(dev);
2441 struct ibmvfc_host *vhost = shost_priv(shost);
2442
2443 return snprintf(buf, PAGE_SIZE, "%s\n",
2444 vhost->login_buf->resp.device_name);
2445}
2446
2447static struct device_attribute ibmvfc_host_device_name = {
2448 .attr = {
2449 .name = "device_name",
2450 .mode = S_IRUGO,
2451 },
2452 .show = ibmvfc_show_host_device_name,
2453};
2454
2455static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2456 struct device_attribute *attr, char *buf)
2457{
2458 struct Scsi_Host *shost = class_to_shost(dev);
2459 struct ibmvfc_host *vhost = shost_priv(shost);
2460
2461 return snprintf(buf, PAGE_SIZE, "%s\n",
2462 vhost->login_buf->resp.port_loc_code);
2463}
2464
2465static struct device_attribute ibmvfc_host_loc_code = {
2466 .attr = {
2467 .name = "port_loc_code",
2468 .mode = S_IRUGO,
2469 },
2470 .show = ibmvfc_show_host_loc_code,
2471};
2472
2473static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2474 struct device_attribute *attr, char *buf)
2475{
2476 struct Scsi_Host *shost = class_to_shost(dev);
2477 struct ibmvfc_host *vhost = shost_priv(shost);
2478
2479 return snprintf(buf, PAGE_SIZE, "%s\n",
2480 vhost->login_buf->resp.drc_name);
2481}
2482
2483static struct device_attribute ibmvfc_host_drc_name = {
2484 .attr = {
2485 .name = "drc_name",
2486 .mode = S_IRUGO,
2487 },
2488 .show = ibmvfc_show_host_drc_name,
2489};
2490
2491static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2492 struct device_attribute *attr, char *buf)
2493{
2494 struct Scsi_Host *shost = class_to_shost(dev);
2495 struct ibmvfc_host *vhost = shost_priv(shost);
2496 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2497}
2498
2499static struct device_attribute ibmvfc_host_npiv_version = {
2500 .attr = {
2501 .name = "npiv_version",
2502 .mode = S_IRUGO,
2503 },
2504 .show = ibmvfc_show_host_npiv_version,
2505};
2506
2507/**
2508 * ibmvfc_show_log_level - Show the adapter's error logging level
2509 * @dev: class device struct
2510 * @buf: buffer
2511 *
2512 * Return value:
2513 * number of bytes printed to buffer
2514 **/
2515static ssize_t ibmvfc_show_log_level(struct device *dev,
2516 struct device_attribute *attr, char *buf)
2517{
2518 struct Scsi_Host *shost = class_to_shost(dev);
2519 struct ibmvfc_host *vhost = shost_priv(shost);
2520 unsigned long flags = 0;
2521 int len;
2522
2523 spin_lock_irqsave(shost->host_lock, flags);
2524 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2525 spin_unlock_irqrestore(shost->host_lock, flags);
2526 return len;
2527}
2528
2529/**
2530 * ibmvfc_store_log_level - Change the adapter's error logging level
2531 * @dev: class device struct
2532 * @buf: buffer
2533 *
2534 * Return value:
2535 * number of bytes printed to buffer
2536 **/
2537static ssize_t ibmvfc_store_log_level(struct device *dev,
2538 struct device_attribute *attr,
2539 const char *buf, size_t count)
2540{
2541 struct Scsi_Host *shost = class_to_shost(dev);
2542 struct ibmvfc_host *vhost = shost_priv(shost);
2543 unsigned long flags = 0;
2544
2545 spin_lock_irqsave(shost->host_lock, flags);
2546 vhost->log_level = simple_strtoul(buf, NULL, 10);
2547 spin_unlock_irqrestore(shost->host_lock, flags);
2548 return strlen(buf);
2549}
2550
2551static struct device_attribute ibmvfc_log_level_attr = {
2552 .attr = {
2553 .name = "log_level",
2554 .mode = S_IRUGO | S_IWUSR,
2555 },
2556 .show = ibmvfc_show_log_level,
2557 .store = ibmvfc_store_log_level
2558};
2559
2560#ifdef CONFIG_SCSI_IBMVFC_TRACE
2561/**
2562 * ibmvfc_read_trace - Dump the adapter trace
2563 * @kobj: kobject struct
2564 * @bin_attr: bin_attribute struct
2565 * @buf: buffer
2566 * @off: offset
2567 * @count: buffer size
2568 *
2569 * Return value:
2570 * number of bytes printed to buffer
2571 **/
2572static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2573 struct bin_attribute *bin_attr,
2574 char *buf, loff_t off, size_t count)
2575{
2576 struct device *dev = container_of(kobj, struct device, kobj);
2577 struct Scsi_Host *shost = class_to_shost(dev);
2578 struct ibmvfc_host *vhost = shost_priv(shost);
2579 unsigned long flags = 0;
2580 int size = IBMVFC_TRACE_SIZE;
2581 char *src = (char *)vhost->trace;
2582
2583 if (off > size)
2584 return 0;
2585 if (off + count > size) {
2586 size -= off;
2587 count = size;
2588 }
2589
2590 spin_lock_irqsave(shost->host_lock, flags);
2591 memcpy(buf, &src[off], count);
2592 spin_unlock_irqrestore(shost->host_lock, flags);
2593 return count;
2594}
2595
2596static struct bin_attribute ibmvfc_trace_attr = {
2597 .attr = {
2598 .name = "trace",
2599 .mode = S_IRUGO,
2600 },
2601 .size = 0,
2602 .read = ibmvfc_read_trace,
2603};
2604#endif
2605
2606static struct device_attribute *ibmvfc_attrs[] = {
2607 &ibmvfc_host_partition_name,
2608 &ibmvfc_host_device_name,
2609 &ibmvfc_host_loc_code,
2610 &ibmvfc_host_drc_name,
2611 &ibmvfc_host_npiv_version,
2612 &ibmvfc_log_level_attr,
2613 NULL
2614};
2615
2616static struct scsi_host_template driver_template = {
2617 .module = THIS_MODULE,
2618 .name = "IBM POWER Virtual FC Adapter",
2619 .proc_name = IBMVFC_NAME,
2620 .queuecommand = ibmvfc_queuecommand,
2621 .eh_abort_handler = ibmvfc_eh_abort_handler,
2622 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2623 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2624 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2625 .slave_alloc = ibmvfc_slave_alloc,
2626 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 2627 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 2628 .scan_finished = ibmvfc_scan_finished,
2629 .change_queue_depth = ibmvfc_change_queue_depth,
2630 .change_queue_type = ibmvfc_change_queue_type,
2631 .cmd_per_lun = 16,
2632 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2633 .this_id = -1,
2634 .sg_tablesize = SG_ALL,
2635 .max_sectors = IBMVFC_MAX_SECTORS,
2636 .use_clustering = ENABLE_CLUSTERING,
2637 .shost_attrs = ibmvfc_attrs,
2638};
2639
2640/**
2641 * ibmvfc_next_async_crq - Returns the next entry in async queue
2642 * @vhost: ibmvfc host struct
2643 *
2644 * Returns:
2645 * Pointer to next entry in queue / NULL if empty
2646 **/
2647static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2648{
2649 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2650 struct ibmvfc_async_crq *crq;
2651
2652 crq = &async_crq->msgs[async_crq->cur];
2653 if (crq->valid & 0x80) {
2654 if (++async_crq->cur == async_crq->size)
2655 async_crq->cur = 0;
2656 } else
2657 crq = NULL;
2658
2659 return crq;
2660}
2661
2662/**
2663 * ibmvfc_next_crq - Returns the next entry in message queue
2664 * @vhost: ibmvfc host struct
2665 *
2666 * Returns:
2667 * Pointer to next entry in queue / NULL if empty
2668 **/
2669static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2670{
2671 struct ibmvfc_crq_queue *queue = &vhost->crq;
2672 struct ibmvfc_crq *crq;
2673
2674 crq = &queue->msgs[queue->cur];
2675 if (crq->valid & 0x80) {
2676 if (++queue->cur == queue->size)
2677 queue->cur = 0;
2678 } else
2679 crq = NULL;
2680
2681 return crq;
2682}
2683
2684/**
2685 * ibmvfc_interrupt - Interrupt handler
2686 * @irq: number of irq to handle, not used
2687 * @dev_instance: ibmvfc_host that received interrupt
2688 *
2689 * Returns:
2690 * IRQ_HANDLED
2691 **/
2692static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2693{
2694 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
2695 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2696 struct ibmvfc_crq *crq;
2697 struct ibmvfc_async_crq *async;
2698 unsigned long flags;
2699 int done = 0;
2700
2701 spin_lock_irqsave(vhost->host->host_lock, flags);
2702 vio_disable_interrupts(to_vio_dev(vhost->dev));
2703 while (!done) {
2704 /* Pull all the valid messages off the CRQ */
2705 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2706 ibmvfc_handle_crq(crq, vhost);
2707 crq->valid = 0;
2708 }
2709
2710 /* Pull all the valid messages off the async CRQ */
2711 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2712 ibmvfc_handle_async(async, vhost);
2713 async->valid = 0;
2714 }
2715
2716 vio_enable_interrupts(vdev);
2717 if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2718 vio_disable_interrupts(vdev);
2719 ibmvfc_handle_crq(crq, vhost);
2720 crq->valid = 0;
2721 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2722 vio_disable_interrupts(vdev);
2723 ibmvfc_handle_async(async, vhost);
2724 crq->valid = 0;
2725 } else
2726 done = 1;
2727 }
2728
2729 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2730 return IRQ_HANDLED;
2731}
2732
2733/**
2734 * ibmvfc_init_tgt - Set the next init job step for the target
2735 * @tgt: ibmvfc target struct
2736 * @job_step: job step to perform
2737 *
2738 **/
2739static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2740 void (*job_step) (struct ibmvfc_target *))
2741{
2742 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2743 tgt->job_step = job_step;
2744 wake_up(&tgt->vhost->work_wait_q);
2745}
2746
2747/**
2748 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2749 * @tgt: ibmvfc target struct
2750 * @job_step: initialization job step
2751 *
2752 **/
2753static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
2754 void (*job_step) (struct ibmvfc_target *))
2755{
2756 if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) {
2757 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2758 wake_up(&tgt->vhost->work_wait_q);
2759 } else
2760 ibmvfc_init_tgt(tgt, job_step);
2761}
2762
072b91f9
BK		 2763/**
2764 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2765 * @evt: ibmvfc event struct
2766 *
2767 **/
2768static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2769{
2770 struct ibmvfc_target *tgt = evt->tgt;
2771 struct ibmvfc_host *vhost = evt->vhost;
2772 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
2773 u32 status = rsp->common.status;
2774
2775 vhost->discovery_threads--;
2776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2777 switch (status) {
2778 case IBMVFC_MAD_SUCCESS:
2779 tgt_dbg(tgt, "Process Login succeeded\n");
2780 tgt->need_login = 0;
2781 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT);
2782 break;
2783 case IBMVFC_MAD_DRIVER_FAILED:
2784 break;
2785 case IBMVFC_MAD_CRQ_ERROR:
2786 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2787 break;
2788 case IBMVFC_MAD_FAILED:
2789 default:
2790 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2791 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2792 rsp->status, rsp->error, status);
2793 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2794 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499
BK		 2795 else
2796 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 2797 break;
2798 };
2799
2800 kref_put(&tgt->kref, ibmvfc_release_tgt);
2801 ibmvfc_free_event(evt);
2802 wake_up(&vhost->work_wait_q);
2803}
2804
2805/**
2806 * ibmvfc_tgt_send_prli - Send a process login
2807 * @tgt: ibmvfc target struct
2808 *
2809 **/
2810static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2811{
2812 struct ibmvfc_process_login *prli;
2813 struct ibmvfc_host *vhost = tgt->vhost;
2814 struct ibmvfc_event *evt;
2815
2816 if (vhost->discovery_threads >= disc_threads)
2817 return;
2818
2819 kref_get(&tgt->kref);
2820 evt = ibmvfc_get_event(vhost);
2821 vhost->discovery_threads++;
2822 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2823 evt->tgt = tgt;
2824 prli = &evt->iu.prli;
2825 memset(prli, 0, sizeof(*prli));
2826 prli->common.version = 1;
2827 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2828 prli->common.length = sizeof(*prli);
2829 prli->scsi_id = tgt->scsi_id;
2830
2831 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2832 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2833 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2834
2835 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2836 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2837 vhost->discovery_threads--;
2838 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2839 kref_put(&tgt->kref, ibmvfc_release_tgt);
2840 } else
2841 tgt_dbg(tgt, "Sent process login\n");
2842}
2843
2844/**
2845 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
2846 * @evt: ibmvfc event struct
2847 *
2848 **/
2849static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
2850{
2851 struct ibmvfc_target *tgt = evt->tgt;
2852 struct ibmvfc_host *vhost = evt->vhost;
2853 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
2854 u32 status = rsp->common.status;
2855
2856 vhost->discovery_threads--;
2857 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2858 switch (status) {
2859 case IBMVFC_MAD_SUCCESS:
2860 tgt_dbg(tgt, "Port Login succeeded\n");
2861 if (tgt->ids.port_name &&
2862 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
2863 vhost->reinit = 1;
2864 tgt_dbg(tgt, "Port re-init required\n");
2865 break;
2866 }
2867 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
2868 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
2869 tgt->ids.port_id = tgt->scsi_id;
2870 tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET;
2871 memcpy(&tgt->service_parms, &rsp->service_parms,
2872 sizeof(tgt->service_parms));
2873 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
2874 sizeof(tgt->service_parms_change));
2875 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
2876 break;
2877 case IBMVFC_MAD_DRIVER_FAILED:
2878 break;
2879 case IBMVFC_MAD_CRQ_ERROR:
2880 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2881 break;
2882 case IBMVFC_MAD_FAILED:
2883 default:
2884 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
2885 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
2886 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
2887 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
2888
2889 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
2890 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499
BK		 2891 else
2892 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 2893 break;
2894 };
2895
2896 kref_put(&tgt->kref, ibmvfc_release_tgt);
2897 ibmvfc_free_event(evt);
2898 wake_up(&vhost->work_wait_q);
2899}
2900
2901/**
2902 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
2903 * @tgt: ibmvfc target struct
2904 *
2905 **/
2906static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
2907{
2908 struct ibmvfc_port_login *plogi;
2909 struct ibmvfc_host *vhost = tgt->vhost;
2910 struct ibmvfc_event *evt;
2911
2912 if (vhost->discovery_threads >= disc_threads)
2913 return;
2914
2915 kref_get(&tgt->kref);
2916 evt = ibmvfc_get_event(vhost);
2917 vhost->discovery_threads++;
2918 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2919 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
2920 evt->tgt = tgt;
2921 plogi = &evt->iu.plogi;
2922 memset(plogi, 0, sizeof(*plogi));
2923 plogi->common.version = 1;
2924 plogi->common.opcode = IBMVFC_PORT_LOGIN;
2925 plogi->common.length = sizeof(*plogi);
2926 plogi->scsi_id = tgt->scsi_id;
2927
2928 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2929 vhost->discovery_threads--;
2930 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2931 kref_put(&tgt->kref, ibmvfc_release_tgt);
2932 } else
2933 tgt_dbg(tgt, "Sent port login\n");
2934}
2935
2936/**
2937 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
2938 * @evt: ibmvfc event struct
2939 *
2940 **/
2941static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
2942{
2943 struct ibmvfc_target *tgt = evt->tgt;
2944 struct ibmvfc_host *vhost = evt->vhost;
2945 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
2946 u32 status = rsp->common.status;
2947
2948 vhost->discovery_threads--;
2949 ibmvfc_free_event(evt);
2950 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2951
2952 switch (status) {
2953 case IBMVFC_MAD_SUCCESS:
2954 tgt_dbg(tgt, "Implicit Logout succeeded\n");
2955 break;
2956 case IBMVFC_MAD_DRIVER_FAILED:
2957 kref_put(&tgt->kref, ibmvfc_release_tgt);
2958 wake_up(&vhost->work_wait_q);
2959 return;
2960 case IBMVFC_MAD_FAILED:
2961 default:
2962 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
2963 break;
2964 };
2965
2966 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
2967 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
2968 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
2969 tgt->scsi_id != tgt->new_scsi_id)
2970 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2971 kref_put(&tgt->kref, ibmvfc_release_tgt);
2972 wake_up(&vhost->work_wait_q);
2973}
2974
2975/**
2976 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
2977 * @tgt: ibmvfc target struct
2978 *
2979 **/
2980static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
2981{
2982 struct ibmvfc_implicit_logout *mad;
2983 struct ibmvfc_host *vhost = tgt->vhost;
2984 struct ibmvfc_event *evt;
2985
2986 if (vhost->discovery_threads >= disc_threads)
2987 return;
2988
2989 kref_get(&tgt->kref);
2990 evt = ibmvfc_get_event(vhost);
2991 vhost->discovery_threads++;
2992 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
2993 evt->tgt = tgt;
2994 mad = &evt->iu.implicit_logout;
2995 memset(mad, 0, sizeof(*mad));
2996 mad->common.version = 1;
2997 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
2998 mad->common.length = sizeof(*mad);
2999 mad->old_scsi_id = tgt->scsi_id;
3000
3001 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3002 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3003 vhost->discovery_threads--;
3004 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3005 kref_put(&tgt->kref, ibmvfc_release_tgt);
3006 } else
3007 tgt_dbg(tgt, "Sent Implicit Logout\n");
3008}
3009
989b8545
BK		 3010/**
3011 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3012 * @mad: ibmvfc passthru mad struct
3013 * @tgt: ibmvfc target struct
3014 *
3015 * Returns:
3016 * 1 if PLOGI needed / 0 if PLOGI not needed
3017 **/
3018static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3019 struct ibmvfc_target *tgt)
3020{
3021 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3022 sizeof(tgt->ids.port_name)))
3023 return 1;
3024 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3025 sizeof(tgt->ids.node_name)))
3026 return 1;
3027 if (mad->fc_iu.response[6] != tgt->scsi_id)
3028 return 1;
3029 return 0;
3030}
3031
3032/**
3033 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3034 * @evt: ibmvfc event struct
3035 *
3036 **/
3037static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3038{
3039 struct ibmvfc_target *tgt = evt->tgt;
3040 struct ibmvfc_host *vhost = evt->vhost;
3041 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3042 u32 status = mad->common.status;
3043 u8 fc_reason, fc_explain;
3044
3045 vhost->discovery_threads--;
3046 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3047
3048 switch (status) {
3049 case IBMVFC_MAD_SUCCESS:
3050 tgt_dbg(tgt, "ADISC succeeded\n");
3051 if (ibmvfc_adisc_needs_plogi(mad, tgt))
3052 tgt->need_login = 1;
3053 break;
3054 case IBMVFC_MAD_DRIVER_FAILED:
3055 break;
3056 case IBMVFC_MAD_FAILED:
3057 default:
3058 tgt->need_login = 1;
3059 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3060 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3061 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3062 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3063 mad->iu.status, mad->iu.error,
3064 ibmvfc_get_fc_type(fc_reason), fc_reason,
3065 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3066 break;
3067 };
3068
3069 kref_put(&tgt->kref, ibmvfc_release_tgt);
3070 ibmvfc_free_event(evt);
3071 wake_up(&vhost->work_wait_q);
3072}
3073
3074/**
3075 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3076 * @evt: ibmvfc event struct
3077 *
3078 **/
3079static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3080{
3081 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3082
3083 memset(mad, 0, sizeof(*mad));
3084 mad->common.version = 1;
3085 mad->common.opcode = IBMVFC_PASSTHRU;
3086 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3087 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3088 offsetof(struct ibmvfc_passthru_mad, iu);
3089 mad->cmd_ioba.len = sizeof(mad->iu);
3090 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3091 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3092 mad->iu.cmd.va = (u64)evt->crq.ioba +
3093 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3094 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3095 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3096 mad->iu.rsp.va = (u64)evt->crq.ioba +
3097 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3098 offsetof(struct ibmvfc_passthru_fc_iu, response);
3099 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3100}
3101
3102/**
3103 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3104 * @tgt: ibmvfc target struct
3105 *
3106 **/
3107static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3108{
3109 struct ibmvfc_passthru_mad *mad;
3110 struct ibmvfc_host *vhost = tgt->vhost;
3111 struct ibmvfc_event *evt;
3112
3113 if (vhost->discovery_threads >= disc_threads)
3114 return;
3115
3116 kref_get(&tgt->kref);
3117 evt = ibmvfc_get_event(vhost);
3118 vhost->discovery_threads++;
3119 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3120 evt->tgt = tgt;
3121
3122 ibmvfc_init_passthru(evt);
3123 mad = &evt->iu.passthru;
3124 mad->iu.flags = IBMVFC_FC_ELS;
3125 mad->iu.scsi_id = tgt->scsi_id;
3126
3127 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3128 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3129 sizeof(vhost->login_buf->resp.port_name));
3130 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3131 sizeof(vhost->login_buf->resp.node_name));
3132 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3133
3134 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3135 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3136 vhost->discovery_threads--;
3137 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3138 kref_put(&tgt->kref, ibmvfc_release_tgt);
3139 } else
3140 tgt_dbg(tgt, "Sent ADISC\n");
3141}
3142
072b91f9
BK		 3143/**
3144 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3145 * @evt: ibmvfc event struct
3146 *
3147 **/
3148static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3149{
3150 struct ibmvfc_target *tgt = evt->tgt;
3151 struct ibmvfc_host *vhost = evt->vhost;
3152 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3153 u32 status = rsp->common.status;
3154
3155 vhost->discovery_threads--;
3156 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3157 switch (status) {
3158 case IBMVFC_MAD_SUCCESS:
3159 tgt_dbg(tgt, "Query Target succeeded\n");
3160 tgt->new_scsi_id = rsp->scsi_id;
3161 if (rsp->scsi_id != tgt->scsi_id)
3162 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3163 else
3164 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3165 break;
3166 case IBMVFC_MAD_DRIVER_FAILED:
3167 break;
3168 case IBMVFC_MAD_CRQ_ERROR:
3169 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3170 break;
3171 case IBMVFC_MAD_FAILED:
3172 default:
3173 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3174 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3175 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3176 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
3177
3178 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3179 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3180 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3181 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3182 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3183 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499
BK		 3184 else
3185 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 3186 break;
3187 };
3188
3189 kref_put(&tgt->kref, ibmvfc_release_tgt);
3190 ibmvfc_free_event(evt);
3191 wake_up(&vhost->work_wait_q);
3192}
3193
3194/**
3195 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3196 * @tgt: ibmvfc target struct
3197 *
3198 **/
3199static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3200{
3201 struct ibmvfc_query_tgt *query_tgt;
3202 struct ibmvfc_host *vhost = tgt->vhost;
3203 struct ibmvfc_event *evt;
3204
3205 if (vhost->discovery_threads >= disc_threads)
3206 return;
3207
3208 kref_get(&tgt->kref);
3209 evt = ibmvfc_get_event(vhost);
3210 vhost->discovery_threads++;
3211 evt->tgt = tgt;
3212 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3213 query_tgt = &evt->iu.query_tgt;
3214 memset(query_tgt, 0, sizeof(*query_tgt));
3215 query_tgt->common.version = 1;
3216 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3217 query_tgt->common.length = sizeof(*query_tgt);
3218 query_tgt->wwpn = tgt->ids.port_name;
3219
3220 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3221 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3222 vhost->discovery_threads--;
3223 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3224 kref_put(&tgt->kref, ibmvfc_release_tgt);
3225 } else
3226 tgt_dbg(tgt, "Sent Query Target\n");
3227}
3228
3229/**
3230 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3231 * @vhost: ibmvfc host struct
3232 * @scsi_id: SCSI ID to allocate target for
3233 *
3234 * Returns:
3235 * 0 on success / other on failure
3236 **/
3237static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3238{
3239 struct ibmvfc_target *tgt;
3240 unsigned long flags;
3241
3242 spin_lock_irqsave(vhost->host->host_lock, flags);
3243 list_for_each_entry(tgt, &vhost->targets, queue) {
3244 if (tgt->scsi_id == scsi_id) {
3245 if (tgt->need_login)
3246 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3247 goto unlock_out;
3248 }
3249 }
3250 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3251
3252 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
3253 if (!tgt) {
3254 dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n",
3255 scsi_id);
3256 return -ENOMEM;
3257 }
3258
3259 tgt->scsi_id = scsi_id;
3260 tgt->new_scsi_id = scsi_id;
3261 tgt->vhost = vhost;
3262 tgt->need_login = 1;
3263 kref_init(&tgt->kref);
3264 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3265 spin_lock_irqsave(vhost->host->host_lock, flags);
3266 list_add_tail(&tgt->queue, &vhost->targets);
3267
3268unlock_out:
3269 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3270 return 0;
3271}
3272
3273/**
3274 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3275 * @vhost: ibmvfc host struct
3276 *
3277 * Returns:
3278 * 0 on success / other on failure
3279 **/
3280static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3281{
3282 int i, rc;
3283
3284 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3285 rc = ibmvfc_alloc_target(vhost,
3286 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3287
3288 return rc;
3289}
3290
3291/**
3292 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3293 * @evt: ibmvfc event struct
3294 *
3295 **/
3296static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3297{
3298 struct ibmvfc_host *vhost = evt->vhost;
3299 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3300 u32 mad_status = rsp->common.status;
3301
3302 switch (mad_status) {
3303 case IBMVFC_MAD_SUCCESS:
3304 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3305 vhost->num_targets = rsp->num_written;
3306 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3307 break;
3308 case IBMVFC_MAD_FAILED:
3309 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n",
3310 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3311 ibmvfc_retry_host_init(vhost);
3312 break;
3313 case IBMVFC_MAD_DRIVER_FAILED:
3314 break;
3315 default:
3316 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3317 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3318 break;
3319 }
3320
3321 ibmvfc_free_event(evt);
3322 wake_up(&vhost->work_wait_q);
3323}
3324
3325/**
3326 * ibmvfc_discover_targets - Send Discover Targets MAD
3327 * @vhost: ibmvfc host struct
3328 *
3329 **/
3330static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3331{
3332 struct ibmvfc_discover_targets *mad;
3333 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3334
3335 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3336 mad = &evt->iu.discover_targets;
3337 memset(mad, 0, sizeof(*mad));
3338 mad->common.version = 1;
3339 mad->common.opcode = IBMVFC_DISC_TARGETS;
3340 mad->common.length = sizeof(*mad);
3341 mad->bufflen = vhost->disc_buf_sz;
3342 mad->buffer.va = vhost->disc_buf_dma;
3343 mad->buffer.len = vhost->disc_buf_sz;
3344 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3345
3346 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3347 ibmvfc_dbg(vhost, "Sent discover targets\n");
3348 else
3349 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3350}
3351
3352/**
3353 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3354 * @evt: ibmvfc event struct
3355 *
3356 **/
3357static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3358{
3359 struct ibmvfc_host *vhost = evt->vhost;
3360 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3361 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3362 unsigned int npiv_max_sectors;
3363
3364 switch (mad_status) {
3365 case IBMVFC_MAD_SUCCESS:
3366 ibmvfc_free_event(evt);
3367 break;
3368 case IBMVFC_MAD_FAILED:
3369 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n",
3370 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
3371 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3372 ibmvfc_retry_host_init(vhost);
3373 else
3374 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3375 ibmvfc_free_event(evt);
3376 return;
3377 case IBMVFC_MAD_CRQ_ERROR:
3378 ibmvfc_retry_host_init(vhost);
3379 case IBMVFC_MAD_DRIVER_FAILED:
3380 ibmvfc_free_event(evt);
3381 return;
3382 default:
3383 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3384 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3385 ibmvfc_free_event(evt);
3386 return;
3387 }
3388
3389 vhost->client_migrated = 0;
3390
3391 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3392 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3393 rsp->flags);
3394 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3395 wake_up(&vhost->work_wait_q);
3396 return;
3397 }
3398
3399 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3400 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3401 rsp->max_cmds);
3402 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3403 wake_up(&vhost->work_wait_q);
3404 return;
3405 }
3406
3407 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3408 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3409 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3410 rsp->drc_name, npiv_max_sectors);
3411
3412 fc_host_fabric_name(vhost->host) = rsp->node_name;
3413 fc_host_node_name(vhost->host) = rsp->node_name;
3414 fc_host_port_name(vhost->host) = rsp->port_name;
3415 fc_host_port_id(vhost->host) = rsp->scsi_id;
3416 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3417 fc_host_supported_classes(vhost->host) = 0;
3418 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3419 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3420 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3421 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3422 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3423 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3424 fc_host_maxframe_size(vhost->host) =
3425 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3426
3427 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3428 vhost->host->max_sectors = npiv_max_sectors;
3429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3430 wake_up(&vhost->work_wait_q);
3431}
3432
3433/**
3434 * ibmvfc_npiv_login - Sends NPIV login
3435 * @vhost: ibmvfc host struct
3436 *
3437 **/
3438static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3439{
3440 struct ibmvfc_npiv_login_mad *mad;
3441 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3442
3443 ibmvfc_gather_partition_info(vhost);
3444 ibmvfc_set_login_info(vhost);
3445 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3446
3447 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3448 mad = &evt->iu.npiv_login;
3449 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3450 mad->common.version = 1;
3451 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3452 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3453 mad->buffer.va = vhost->login_buf_dma;
3454 mad->buffer.len = sizeof(*vhost->login_buf);
3455
072b91f9
BK		 3456 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3457
3458 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3459 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3460 else
3461 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3462};
3463
3464/**
3465 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3466 * @vhost: ibmvfc host struct
3467 *
3468 * Returns:
3469 * 1 if work to do / 0 if not
3470 **/
3471static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3472{
3473 struct ibmvfc_target *tgt;
3474
3475 list_for_each_entry(tgt, &vhost->targets, queue) {
3476 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3477 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3478 return 1;
3479 }
3480
3481 return 0;
3482}
3483
3484/**
3485 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3486 * @vhost: ibmvfc host struct
3487 *
3488 * Returns:
3489 * 1 if work to do / 0 if not
3490 **/
3491static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3492{
3493 struct ibmvfc_target *tgt;
3494
3495 if (kthread_should_stop())
3496 return 1;
3497 switch (vhost->action) {
3498 case IBMVFC_HOST_ACTION_NONE:
3499 case IBMVFC_HOST_ACTION_INIT_WAIT:
3500 return 0;
3501 case IBMVFC_HOST_ACTION_TGT_INIT:
3502 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3503 if (vhost->discovery_threads == disc_threads)
3504 return 0;
3505 list_for_each_entry(tgt, &vhost->targets, queue)
3506 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3507 return 1;
3508 list_for_each_entry(tgt, &vhost->targets, queue)
3509 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3510 return 0;
3511 return 1;
3512 case IBMVFC_HOST_ACTION_INIT:
3513 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3514 case IBMVFC_HOST_ACTION_TGT_ADD:
3515 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 3516 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 3517 case IBMVFC_HOST_ACTION_QUERY:
3518 default:
3519 break;
3520 };
3521
3522 return 1;
3523}
3524
3525/**
3526 * ibmvfc_work_to_do - Is there task level work to do?
3527 * @vhost: ibmvfc host struct
3528 *
3529 * Returns:
3530 * 1 if work to do / 0 if not
3531 **/
3532static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3533{
3534 unsigned long flags;
3535 int rc;
3536
3537 spin_lock_irqsave(vhost->host->host_lock, flags);
3538 rc = __ibmvfc_work_to_do(vhost);
3539 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3540 return rc;
3541}
3542
3543/**
3544 * ibmvfc_log_ae - Log async events if necessary
3545 * @vhost: ibmvfc host struct
3546 * @events: events to log
3547 *
3548 **/
3549static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3550{
3551 if (events & IBMVFC_AE_RSCN)
3552 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3553 if ((events & IBMVFC_AE_LINKDOWN) &&
3554 vhost->state >= IBMVFC_HALTED)
3555 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3556 if ((events & IBMVFC_AE_LINKUP) &&
3557 vhost->state == IBMVFC_INITIALIZING)
3558 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3559}
3560
3561/**
3562 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3563 * @tgt: ibmvfc target struct
3564 *
3565 **/
3566static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3567{
3568 struct ibmvfc_host *vhost = tgt->vhost;
3569 struct fc_rport *rport;
3570 unsigned long flags;
3571
3572 tgt_dbg(tgt, "Adding rport\n");
3573 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3574 spin_lock_irqsave(vhost->host->host_lock, flags);
3575 tgt->rport = rport;
3576 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3577 if (rport) {
3578 tgt_dbg(tgt, "rport add succeeded\n");
3579 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3580 rport->supported_classes = 0;
52d7e861 3581 tgt->target_id = rport->scsi_target_id;
072b91f9
BK		 3582 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3583 rport->supported_classes |= FC_COS_CLASS1;
3584 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3585 rport->supported_classes |= FC_COS_CLASS2;
3586 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3587 rport->supported_classes |= FC_COS_CLASS3;
3588 } else
3589 tgt_dbg(tgt, "rport add failed\n");
3590 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3591}
3592
3593/**
3594 * ibmvfc_do_work - Do task level work
3595 * @vhost: ibmvfc host struct
3596 *
3597 **/
3598static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3599{
3600 struct ibmvfc_target *tgt;
3601 unsigned long flags;
3602 struct fc_rport *rport;
3603
3604 ibmvfc_log_ae(vhost, vhost->events_to_log);
3605 spin_lock_irqsave(vhost->host->host_lock, flags);
3606 vhost->events_to_log = 0;
3607 switch (vhost->action) {
3608 case IBMVFC_HOST_ACTION_NONE:
3609 case IBMVFC_HOST_ACTION_INIT_WAIT:
3610 break;
3611 case IBMVFC_HOST_ACTION_INIT:
3612 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
3613 vhost->job_step(vhost);
3614 break;
3615 case IBMVFC_HOST_ACTION_QUERY:
3616 list_for_each_entry(tgt, &vhost->targets, queue)
3617 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3618 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3619 break;
3620 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3621 list_for_each_entry(tgt, &vhost->targets, queue) {
3622 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3623 tgt->job_step(tgt);
3624 break;
3625 }
3626 }
3627
3628 if (!ibmvfc_dev_init_to_do(vhost))
3629 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3630 break;
3631 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 3632 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 3633 list_for_each_entry(tgt, &vhost->targets, queue) {
3634 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3635 tgt_dbg(tgt, "Deleting rport\n");
3636 rport = tgt->rport;
3637 tgt->rport = NULL;
3638 list_del(&tgt->queue);
3639 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3640 if (rport)
3641 fc_remote_port_delete(rport);
3642 kref_put(&tgt->kref, ibmvfc_release_tgt);
3643 return;
3644 }
3645 }
3646
3647 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499
BK		 3648 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
3649 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3650 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD);
3651 vhost->init_retries = 0;
3652 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3653 scsi_unblock_requests(vhost->host);
3654 return;
3655 } else {
3656 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
3657 vhost->job_step = ibmvfc_discover_targets;
3658 }
072b91f9
BK		 3659 } else {
3660 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3661 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3662 scsi_unblock_requests(vhost->host);
3663 wake_up(&vhost->init_wait_q);
3664 return;
3665 }
3666 break;
3667 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
3668 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
3669 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3670 ibmvfc_alloc_targets(vhost);
3671 spin_lock_irqsave(vhost->host->host_lock, flags);
3672 break;
3673 case IBMVFC_HOST_ACTION_TGT_INIT:
3674 list_for_each_entry(tgt, &vhost->targets, queue) {
3675 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3676 tgt->job_step(tgt);
3677 break;
3678 }
3679 }
3680
10e79499
BK		 3681 if (!ibmvfc_dev_init_to_do(vhost))
3682 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9
BK		 3683 break;
3684 case IBMVFC_HOST_ACTION_TGT_ADD:
3685 list_for_each_entry(tgt, &vhost->targets, queue) {
3686 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) {
3687 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3688 ibmvfc_tgt_add_rport(tgt);
3689 return;
072b91f9
BK		 3690 }
3691 }
3692
915be024 3693 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
072b91f9 3694 vhost->reinit = 0;
915be024 3695 scsi_block_requests(vhost->host);
072b91f9
BK		 3696 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3697 } else {
3698 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3699 wake_up(&vhost->init_wait_q);
3700 }
3701 break;
3702 default:
3703 break;
3704 };
3705
3706 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3707}
3708
3709/**
3710 * ibmvfc_work - Do task level work
3711 * @data: ibmvfc host struct
3712 *
3713 * Returns:
3714 * zero
3715 **/
3716static int ibmvfc_work(void *data)
3717{
3718 struct ibmvfc_host *vhost = data;
3719 int rc;
3720
3721 set_user_nice(current, -20);
3722
3723 while (1) {
3724 rc = wait_event_interruptible(vhost->work_wait_q,
3725 ibmvfc_work_to_do(vhost));
3726
3727 BUG_ON(rc);
3728
3729 if (kthread_should_stop())
3730 break;
3731
3732 ibmvfc_do_work(vhost);
3733 }
3734
3735 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
3736 return 0;
3737}
3738
3739/**
3740 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
3741 * @vhost: ibmvfc host struct
3742 *
3743 * Allocates a page for messages, maps it for dma, and registers
3744 * the crq with the hypervisor.
3745 *
3746 * Return value:
3747 * zero on success / other on failure
3748 **/
3749static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
3750{
3751 int rc, retrc = -ENOMEM;
3752 struct device *dev = vhost->dev;
3753 struct vio_dev *vdev = to_vio_dev(dev);
3754 struct ibmvfc_crq_queue *crq = &vhost->crq;
3755
3756 ENTER;
3757 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
3758
3759 if (!crq->msgs)
3760 return -ENOMEM;
3761
3762 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3763 crq->msg_token = dma_map_single(dev, crq->msgs,
3764 PAGE_SIZE, DMA_BIDIRECTIONAL);
3765
8d8bb39b 3766 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 3767 goto map_failed;
3768
3769 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3770 crq->msg_token, PAGE_SIZE);
3771
3772 if (rc == H_RESOURCE)
3773 /* maybe kexecing and resource is busy. try a reset */
3774 retrc = rc = ibmvfc_reset_crq(vhost);
3775
3776 if (rc == H_CLOSED)
3777 dev_warn(dev, "Partner adapter not ready\n");
3778 else if (rc) {
3779 dev_warn(dev, "Error %d opening adapter\n", rc);
3780 goto reg_crq_failed;
3781 }
3782
3783 retrc = 0;
3784
3785 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
3786 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
3787 goto req_irq_failed;
3788 }
3789
3790 if ((rc = vio_enable_interrupts(vdev))) {
3791 dev_err(dev, "Error %d enabling interrupts\n", rc);
3792 goto req_irq_failed;
3793 }
3794
3795 crq->cur = 0;
3796 LEAVE;
3797 return retrc;
3798
3799req_irq_failed:
3800 do {
3801 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3802 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3803reg_crq_failed:
3804 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3805map_failed:
3806 free_page((unsigned long)crq->msgs);
3807 return retrc;
3808}
3809
3810/**
3811 * ibmvfc_free_mem - Free memory for vhost
3812 * @vhost: ibmvfc host struct
3813 *
3814 * Return value:
3815 * none
3816 **/
3817static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
3818{
3819 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3820
3821 ENTER;
3822 mempool_destroy(vhost->tgt_pool);
3823 kfree(vhost->trace);
3824 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
3825 vhost->disc_buf_dma);
3826 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
3827 vhost->login_buf, vhost->login_buf_dma);
3828 dma_pool_destroy(vhost->sg_pool);
3829 dma_unmap_single(vhost->dev, async_q->msg_token,
3830 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3831 free_page((unsigned long)async_q->msgs);
3832 LEAVE;
3833}
3834
3835/**
3836 * ibmvfc_alloc_mem - Allocate memory for vhost
3837 * @vhost: ibmvfc host struct
3838 *
3839 * Return value:
3840 * 0 on success / non-zero on failure
3841 **/
3842static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
3843{
3844 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
3845 struct device *dev = vhost->dev;
3846
3847 ENTER;
3848 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
3849 if (!async_q->msgs) {
3850 dev_err(dev, "Couldn't allocate async queue.\n");
3851 goto nomem;
3852 }
3853
3854 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
3855 async_q->msg_token = dma_map_single(dev, async_q->msgs,
3856 async_q->size * sizeof(*async_q->msgs),
3857 DMA_BIDIRECTIONAL);
3858
8d8bb39b 3859 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 3860 dev_err(dev, "Failed to map async queue\n");
3861 goto free_async_crq;
3862 }
3863
3864 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
3865 SG_ALL * sizeof(struct srp_direct_buf),
3866 sizeof(struct srp_direct_buf), 0);
3867
3868 if (!vhost->sg_pool) {
3869 dev_err(dev, "Failed to allocate sg pool\n");
3870 goto unmap_async_crq;
3871 }
3872
3873 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
3874 &vhost->login_buf_dma, GFP_KERNEL);
3875
3876 if (!vhost->login_buf) {
3877 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
3878 goto free_sg_pool;
3879 }
3880
3881 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
3882 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
3883 &vhost->disc_buf_dma, GFP_KERNEL);
3884
3885 if (!vhost->disc_buf) {
3886 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
3887 goto free_login_buffer;
3888 }
3889
3890 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
3891 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
3892
3893 if (!vhost->trace)
3894 goto free_disc_buffer;
3895
3896 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
3897 sizeof(struct ibmvfc_target));
3898
3899 if (!vhost->tgt_pool) {
3900 dev_err(dev, "Couldn't allocate target memory pool\n");
3901 goto free_trace;
3902 }
3903
3904 LEAVE;
3905 return 0;
3906
3907free_trace:
3908 kfree(vhost->trace);
3909free_disc_buffer:
3910 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
3911 vhost->disc_buf_dma);
3912free_login_buffer:
3913 dma_free_coherent(dev, sizeof(*vhost->login_buf),
3914 vhost->login_buf, vhost->login_buf_dma);
3915free_sg_pool:
3916 dma_pool_destroy(vhost->sg_pool);
3917unmap_async_crq:
3918 dma_unmap_single(dev, async_q->msg_token,
3919 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
3920free_async_crq:
3921 free_page((unsigned long)async_q->msgs);
3922nomem:
3923 LEAVE;
3924 return -ENOMEM;
3925}
3926
3927/**
3928 * ibmvfc_probe - Adapter hot plug add entry point
3929 * @vdev: vio device struct
3930 * @id: vio device id struct
3931 *
3932 * Return value:
3933 * 0 on success / non-zero on failure
3934 **/
3935static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
3936{
3937 struct ibmvfc_host *vhost;
3938 struct Scsi_Host *shost;
3939 struct device *dev = &vdev->dev;
3940 int rc = -ENOMEM;
3941
3942 ENTER;
3943 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
3944 if (!shost) {
3945 dev_err(dev, "Couldn't allocate host data\n");
3946 goto out;
3947 }
3948
3949 shost->transportt = ibmvfc_transport_template;
3950 shost->can_queue = max_requests;
3951 shost->max_lun = max_lun;
3952 shost->max_id = max_targets;
3953 shost->max_sectors = IBMVFC_MAX_SECTORS;
3954 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
3955 shost->unique_id = shost->host_no;
3956
3957 vhost = shost_priv(shost);
3958 INIT_LIST_HEAD(&vhost->sent);
3959 INIT_LIST_HEAD(&vhost->free);
3960 INIT_LIST_HEAD(&vhost->targets);
3961 sprintf(vhost->name, IBMVFC_NAME);
3962 vhost->host = shost;
3963 vhost->dev = dev;
3964 vhost->partition_number = -1;
3965 vhost->log_level = log_level;
3966 strcpy(vhost->partition_name, "UNKNOWN");
3967 init_waitqueue_head(&vhost->work_wait_q);
3968 init_waitqueue_head(&vhost->init_wait_q);
3969
3970 if ((rc = ibmvfc_alloc_mem(vhost)))
3971 goto free_scsi_host;
3972
3973 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
3974 shost->host_no);
3975
3976 if (IS_ERR(vhost->work_thread)) {
3977 dev_err(dev, "Couldn't create kernel thread: %ld\n",
3978 PTR_ERR(vhost->work_thread));
3979 goto free_host_mem;
3980 }
3981
3982 if ((rc = ibmvfc_init_crq(vhost))) {
3983 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3984 goto kill_kthread;
3985 }
3986
3987 if ((rc = ibmvfc_init_event_pool(vhost))) {
3988 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
3989 goto release_crq;
3990 }
3991
3992 if ((rc = scsi_add_host(shost, dev)))
3993 goto release_event_pool;
3994
3995 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
3996 &ibmvfc_trace_attr))) {
3997 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
3998 goto remove_shost;
3999 }
4000
4001 dev_set_drvdata(dev, vhost);
4002 spin_lock(&ibmvfc_driver_lock);
4003 list_add_tail(&vhost->queue, &ibmvfc_head);
4004 spin_unlock(&ibmvfc_driver_lock);
4005
4006 ibmvfc_send_crq_init(vhost);
4007 scsi_scan_host(shost);
4008 return 0;
4009
4010remove_shost:
4011 scsi_remove_host(shost);
4012release_event_pool:
4013 ibmvfc_free_event_pool(vhost);
4014release_crq:
4015 ibmvfc_release_crq_queue(vhost);
4016kill_kthread:
4017 kthread_stop(vhost->work_thread);
4018free_host_mem:
4019 ibmvfc_free_mem(vhost);
4020free_scsi_host:
4021 scsi_host_put(shost);
4022out:
4023 LEAVE;
4024 return rc;
4025}
4026
4027/**
4028 * ibmvfc_remove - Adapter hot plug remove entry point
4029 * @vdev: vio device struct
4030 *
4031 * Return value:
4032 * 0
4033 **/
4034static int ibmvfc_remove(struct vio_dev *vdev)
4035{
4036 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4037 unsigned long flags;
4038
4039 ENTER;
4040 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
2d0da2a4
BK		 4041 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
4042 ibmvfc_wait_while_resetting(vhost);
4043 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 4044 kthread_stop(vhost->work_thread);
4045 fc_remove_host(vhost->host);
4046 scsi_remove_host(vhost->host);
072b91f9
BK		 4047
4048 spin_lock_irqsave(vhost->host->host_lock, flags);
4049 ibmvfc_purge_requests(vhost, DID_ERROR);
4050 ibmvfc_free_event_pool(vhost);
4051 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4052
4053 ibmvfc_free_mem(vhost);
4054 spin_lock(&ibmvfc_driver_lock);
4055 list_del(&vhost->queue);
4056 spin_unlock(&ibmvfc_driver_lock);
4057 scsi_host_put(vhost->host);
4058 LEAVE;
4059 return 0;
4060}
4061
39c1ffec
BK		 4062/**
4063 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4064 * @vdev: vio device struct
4065 *
4066 * Return value:
4067 * Number of bytes the driver will need to DMA map at the same time in
4068 * order to perform well.
4069 */
4070static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4071{
4072 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4073 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4074}
4075
072b91f9
BK		 4076static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4077 {"fcp", "IBM,vfc-client"},
4078 { "", "" }
4079};
4080MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4081
4082static struct vio_driver ibmvfc_driver = {
4083 .id_table = ibmvfc_device_table,
4084 .probe = ibmvfc_probe,
4085 .remove = ibmvfc_remove,
39c1ffec 4086 .get_desired_dma = ibmvfc_get_desired_dma,
072b91f9
BK		 4087 .driver = {
4088 .name = IBMVFC_NAME,
4089 .owner = THIS_MODULE,
4090 }
4091};
4092
4093static struct fc_function_template ibmvfc_transport_functions = {
4094 .show_host_fabric_name = 1,
4095 .show_host_node_name = 1,
4096 .show_host_port_name = 1,
4097 .show_host_supported_classes = 1,
4098 .show_host_port_type = 1,
4099 .show_host_port_id = 1,
4100
4101 .get_host_port_state = ibmvfc_get_host_port_state,
4102 .show_host_port_state = 1,
4103
4104 .get_host_speed = ibmvfc_get_host_speed,
4105 .show_host_speed = 1,
4106
4107 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4108 .terminate_rport_io = ibmvfc_terminate_rport_io,
4109
4110 .show_rport_maxframe_size = 1,
4111 .show_rport_supported_classes = 1,
4112
4113 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4114 .show_rport_dev_loss_tmo = 1,
4115
4116 .get_starget_node_name = ibmvfc_get_starget_node_name,
4117 .show_starget_node_name = 1,
4118
4119 .get_starget_port_name = ibmvfc_get_starget_port_name,
4120 .show_starget_port_name = 1,
4121
4122 .get_starget_port_id = ibmvfc_get_starget_port_id,
4123 .show_starget_port_id = 1,
4124};
4125
4126/**
4127 * ibmvfc_module_init - Initialize the ibmvfc module
4128 *
4129 * Return value:
4130 * 0 on success / other on failure
4131 **/
4132static int __init ibmvfc_module_init(void)
4133{
4134 int rc;
4135
4136 if (!firmware_has_feature(FW_FEATURE_VIO))
4137 return -ENODEV;
4138
4139 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4140 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4141
4142 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4143 if (!ibmvfc_transport_template)
4144 return -ENOMEM;
4145
4146 rc = vio_register_driver(&ibmvfc_driver);
4147 if (rc)
4148 fc_release_transport(ibmvfc_transport_template);
4149 return rc;
4150}
4151
4152/**
4153 * ibmvfc_module_exit - Teardown the ibmvfc module
4154 *
4155 * Return value:
4156 * nothing
4157 **/
4158static void __exit ibmvfc_module_exit(void)
4159{
4160 vio_unregister_driver(&ibmvfc_driver);
4161 fc_release_transport(ibmvfc_transport_template);
4162}
4163
4164module_init(ibmvfc_module_init);
4165module_exit(ibmvfc_module_exit);
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