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[SCSI] ibmvfc: Fix locking in ibmvfc_remove
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / ibmvscsi / ibmvfc.c
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072b91f9
BK		 1/*
2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
3 *
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
5 *
6 * Copyright (C) IBM Corporation, 2008
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/dma-mapping.h>
27#include <linux/dmapool.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/kthread.h>
31#include <linux/of.h>
32#include <linux/stringify.h>
33#include <asm/firmware.h>
34#include <asm/irq.h>
35#include <asm/vio.h>
36#include <scsi/scsi.h>
37#include <scsi/scsi_cmnd.h>
38#include <scsi/scsi_host.h>
39#include <scsi/scsi_device.h>
40#include <scsi/scsi_tcq.h>
41#include <scsi/scsi_transport_fc.h>
42#include "ibmvfc.h"
43
44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
46static unsigned int max_lun = IBMVFC_MAX_LUN;
47static unsigned int max_targets = IBMVFC_MAX_TARGETS;
48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
51static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
53static LIST_HEAD(ibmvfc_head);
54static DEFINE_SPINLOCK(ibmvfc_driver_lock);
55static struct scsi_transport_template *ibmvfc_transport_template;
56
57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
59MODULE_LICENSE("GPL");
60MODULE_VERSION(IBMVFC_DRIVER_VERSION);
61
62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
66MODULE_PARM_DESC(default_timeout,
67 "Default timeout in seconds for initialization and EH commands. "
68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
69module_param_named(max_requests, max_requests, uint, S_IRUGO);
70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
72module_param_named(max_lun, max_lun, uint, S_IRUGO);
73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
75module_param_named(max_targets, max_targets, uint, S_IRUGO);
76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
545ef9a2 78module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
072b91f9
BK		 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
82MODULE_PARM_DESC(debug, "Enable driver debug information. "
83 "[Default=" __stringify(IBMVFC_DEBUG) "]");
84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
86 "transport should insulate the loss of a remote port. Once this "
87 "value is exceeded, the scsi target is removed. "
88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
89module_param_named(log_level, log_level, uint, 0);
90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
92
93static const struct {
94 u16 status;
95 u16 error;
96 u8 result;
97 u8 retry;
98 int log;
99 char *name;
100} cmd_status [] = {
101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
752b3232 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
072b91f9
BK		 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
497f9c50 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
072b91f9
BK		 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
115
116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
752b3232
BK		 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
072b91f9 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
752b3232
BK		 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
072b91f9 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
646d3857 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
072b91f9
BK		 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
126
127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
138
139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
140};
141
142static void ibmvfc_npiv_login(struct ibmvfc_host *);
143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
145static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
79111d08 146static void ibmvfc_npiv_logout(struct ibmvfc_host *);
072b91f9
BK		 147
148static const char *unknown_error = "unknown error";
149
150#ifdef CONFIG_SCSI_IBMVFC_TRACE
151/**
152 * ibmvfc_trc_start - Log a start trace entry
153 * @evt: ibmvfc event struct
154 *
155 **/
156static void ibmvfc_trc_start(struct ibmvfc_event *evt)
157{
158 struct ibmvfc_host *vhost = evt->vhost;
159 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
160 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
161 struct ibmvfc_trace_entry *entry;
162
163 entry = &vhost->trace[vhost->trace_index++];
164 entry->evt = evt;
165 entry->time = jiffies;
166 entry->fmt = evt->crq.format;
167 entry->type = IBMVFC_TRC_START;
168
169 switch (entry->fmt) {
170 case IBMVFC_CMD_FORMAT:
171 entry->op_code = vfc_cmd->iu.cdb[0];
172 entry->scsi_id = vfc_cmd->tgt_scsi_id;
173 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
174 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
175 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
176 break;
177 case IBMVFC_MAD_FORMAT:
178 entry->op_code = mad->opcode;
179 break;
180 default:
181 break;
182 };
183}
184
185/**
186 * ibmvfc_trc_end - Log an end trace entry
187 * @evt: ibmvfc event struct
188 *
189 **/
190static void ibmvfc_trc_end(struct ibmvfc_event *evt)
191{
192 struct ibmvfc_host *vhost = evt->vhost;
193 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
194 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
195 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
196
197 entry->evt = evt;
198 entry->time = jiffies;
199 entry->fmt = evt->crq.format;
200 entry->type = IBMVFC_TRC_END;
201
202 switch (entry->fmt) {
203 case IBMVFC_CMD_FORMAT:
204 entry->op_code = vfc_cmd->iu.cdb[0];
205 entry->scsi_id = vfc_cmd->tgt_scsi_id;
206 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
207 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
208 entry->u.end.status = vfc_cmd->status;
209 entry->u.end.error = vfc_cmd->error;
210 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
211 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
212 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
213 break;
214 case IBMVFC_MAD_FORMAT:
215 entry->op_code = mad->opcode;
216 entry->u.end.status = mad->status;
217 break;
218 default:
219 break;
220
221 };
222}
223
224#else
225#define ibmvfc_trc_start(evt) do { } while (0)
226#define ibmvfc_trc_end(evt) do { } while (0)
227#endif
228
229/**
230 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
231 * @status: status / error class
232 * @error: error
233 *
234 * Return value:
235 * index into cmd_status / -EINVAL on failure
236 **/
237static int ibmvfc_get_err_index(u16 status, u16 error)
238{
239 int i;
240
241 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
242 if ((cmd_status[i].status & status) == cmd_status[i].status &&
243 cmd_status[i].error == error)
244 return i;
245
246 return -EINVAL;
247}
248
249/**
250 * ibmvfc_get_cmd_error - Find the error description for the fcp response
251 * @status: status / error class
252 * @error: error
253 *
254 * Return value:
255 * error description string
256 **/
257static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
258{
259 int rc = ibmvfc_get_err_index(status, error);
260 if (rc >= 0)
261 return cmd_status[rc].name;
262 return unknown_error;
263}
264
265/**
266 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
267 * @vfc_cmd: ibmvfc command struct
268 *
269 * Return value:
270 * SCSI result value to return for completed command
271 **/
272static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
273{
274 int err;
275 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
276 int fc_rsp_len = rsp->fcp_rsp_len;
277
278 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
4a2837d4 279 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
072b91f9
BK		 280 rsp->data.info.rsp_code))
281 return DID_ERROR << 16;
282
072b91f9
BK		 283 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
284 if (err >= 0)
285 return rsp->scsi_status | (cmd_status[err].result << 16);
286 return rsp->scsi_status | (DID_ERROR << 16);
287}
288
289/**
290 * ibmvfc_retry_cmd - Determine if error status is retryable
291 * @status: status / error class
292 * @error: error
293 *
294 * Return value:
295 * 1 if error should be retried / 0 if it should not
296 **/
297static int ibmvfc_retry_cmd(u16 status, u16 error)
298{
299 int rc = ibmvfc_get_err_index(status, error);
300
301 if (rc >= 0)
302 return cmd_status[rc].retry;
303 return 1;
304}
305
306static const char *unknown_fc_explain = "unknown fc explain";
307
308static const struct {
309 u16 fc_explain;
310 char *name;
311} ls_explain [] = {
312 { 0x00, "no additional explanation" },
313 { 0x01, "service parameter error - options" },
314 { 0x03, "service parameter error - initiator control" },
315 { 0x05, "service parameter error - recipient control" },
316 { 0x07, "service parameter error - received data field size" },
317 { 0x09, "service parameter error - concurrent seq" },
318 { 0x0B, "service parameter error - credit" },
319 { 0x0D, "invalid N_Port/F_Port_Name" },
320 { 0x0E, "invalid node/Fabric Name" },
321 { 0x0F, "invalid common service parameters" },
322 { 0x11, "invalid association header" },
323 { 0x13, "association header required" },
324 { 0x15, "invalid originator S_ID" },
325 { 0x17, "invalid OX_ID-RX-ID combination" },
326 { 0x19, "command (request) already in progress" },
327 { 0x1E, "N_Port Login requested" },
328 { 0x1F, "Invalid N_Port_ID" },
329};
330
331static const struct {
332 u16 fc_explain;
333 char *name;
334} gs_explain [] = {
335 { 0x00, "no additional explanation" },
336 { 0x01, "port identifier not registered" },
337 { 0x02, "port name not registered" },
338 { 0x03, "node name not registered" },
339 { 0x04, "class of service not registered" },
340 { 0x06, "initial process associator not registered" },
341 { 0x07, "FC-4 TYPEs not registered" },
342 { 0x08, "symbolic port name not registered" },
343 { 0x09, "symbolic node name not registered" },
344 { 0x0A, "port type not registered" },
345 { 0xF0, "authorization exception" },
346 { 0xF1, "authentication exception" },
347 { 0xF2, "data base full" },
348 { 0xF3, "data base empty" },
349 { 0xF4, "processing request" },
350 { 0xF5, "unable to verify connection" },
351 { 0xF6, "devices not in a common zone" },
352};
353
354/**
355 * ibmvfc_get_ls_explain - Return the FC Explain description text
356 * @status: FC Explain status
357 *
358 * Returns:
359 * error string
360 **/
361static const char *ibmvfc_get_ls_explain(u16 status)
362{
363 int i;
364
365 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
366 if (ls_explain[i].fc_explain == status)
367 return ls_explain[i].name;
368
369 return unknown_fc_explain;
370}
371
372/**
373 * ibmvfc_get_gs_explain - Return the FC Explain description text
374 * @status: FC Explain status
375 *
376 * Returns:
377 * error string
378 **/
379static const char *ibmvfc_get_gs_explain(u16 status)
380{
381 int i;
382
383 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
384 if (gs_explain[i].fc_explain == status)
385 return gs_explain[i].name;
386
387 return unknown_fc_explain;
388}
389
390static const struct {
391 enum ibmvfc_fc_type fc_type;
392 char *name;
393} fc_type [] = {
394 { IBMVFC_FABRIC_REJECT, "fabric reject" },
395 { IBMVFC_PORT_REJECT, "port reject" },
396 { IBMVFC_LS_REJECT, "ELS reject" },
397 { IBMVFC_FABRIC_BUSY, "fabric busy" },
398 { IBMVFC_PORT_BUSY, "port busy" },
399 { IBMVFC_BASIC_REJECT, "basic reject" },
400};
401
402static const char *unknown_fc_type = "unknown fc type";
403
404/**
405 * ibmvfc_get_fc_type - Return the FC Type description text
406 * @status: FC Type error status
407 *
408 * Returns:
409 * error string
410 **/
411static const char *ibmvfc_get_fc_type(u16 status)
412{
413 int i;
414
415 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
416 if (fc_type[i].fc_type == status)
417 return fc_type[i].name;
418
419 return unknown_fc_type;
420}
421
422/**
423 * ibmvfc_set_tgt_action - Set the next init action for the target
424 * @tgt: ibmvfc target struct
425 * @action: action to perform
426 *
427 **/
428static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
429 enum ibmvfc_target_action action)
430{
431 switch (tgt->action) {
432 case IBMVFC_TGT_ACTION_DEL_RPORT:
433 break;
434 default:
43c8da90
BK		 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
436 tgt->add_rport = 0;
072b91f9
BK		 437 tgt->action = action;
438 break;
439 }
440}
441
442/**
443 * ibmvfc_set_host_state - Set the state for the host
444 * @vhost: ibmvfc host struct
445 * @state: state to set host to
446 *
447 * Returns:
448 * 0 if state changed / non-zero if not changed
449 **/
450static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
451 enum ibmvfc_host_state state)
452{
453 int rc = 0;
454
455 switch (vhost->state) {
456 case IBMVFC_HOST_OFFLINE:
457 rc = -EINVAL;
458 break;
459 default:
460 vhost->state = state;
461 break;
462 };
463
464 return rc;
465}
466
467/**
468 * ibmvfc_set_host_action - Set the next init action for the host
469 * @vhost: ibmvfc host struct
470 * @action: action to perform
471 *
472 **/
473static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
474 enum ibmvfc_host_action action)
475{
476 switch (action) {
477 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
479 vhost->action = action;
480 break;
79111d08
BK		 481 case IBMVFC_HOST_ACTION_LOGO_WAIT:
482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
483 vhost->action = action;
484 break;
072b91f9
BK		 485 case IBMVFC_HOST_ACTION_INIT_WAIT:
486 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
487 vhost->action = action;
488 break;
489 case IBMVFC_HOST_ACTION_QUERY:
490 switch (vhost->action) {
491 case IBMVFC_HOST_ACTION_INIT_WAIT:
492 case IBMVFC_HOST_ACTION_NONE:
43c8da90 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 494 vhost->action = action;
495 break;
496 default:
497 break;
498 };
499 break;
500 case IBMVFC_HOST_ACTION_TGT_INIT:
501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
502 vhost->action = action;
503 break;
79111d08 504 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 505 case IBMVFC_HOST_ACTION_INIT:
506 case IBMVFC_HOST_ACTION_TGT_DEL:
507 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 509 case IBMVFC_HOST_ACTION_NONE:
510 default:
511 vhost->action = action;
512 break;
513 };
514}
515
516/**
517 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
518 * @vhost: ibmvfc host struct
519 *
520 * Return value:
521 * nothing
522 **/
523static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
524{
525 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 526 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
527 scsi_block_requests(vhost->host);
528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
529 }
072b91f9
BK		 530 } else
531 vhost->reinit = 1;
532
533 wake_up(&vhost->work_wait_q);
534}
535
536/**
537 * ibmvfc_link_down - Handle a link down event from the adapter
538 * @vhost: ibmvfc host struct
539 * @state: ibmvfc host state to enter
540 *
541 **/
542static void ibmvfc_link_down(struct ibmvfc_host *vhost,
543 enum ibmvfc_host_state state)
544{
545 struct ibmvfc_target *tgt;
546
547 ENTER;
548 scsi_block_requests(vhost->host);
549 list_for_each_entry(tgt, &vhost->targets, queue)
550 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
551 ibmvfc_set_host_state(vhost, state);
552 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
553 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
554 wake_up(&vhost->work_wait_q);
555 LEAVE;
556}
557
558/**
559 * ibmvfc_init_host - Start host initialization
560 * @vhost: ibmvfc host struct
cf6f10d7 561 * @relogin: is this a re-login?
072b91f9
BK		 562 *
563 * Return value:
564 * nothing
565 **/
cf6f10d7 566static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
072b91f9
BK		 567{
568 struct ibmvfc_target *tgt;
569
570 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82 571 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 572 dev_err(vhost->dev,
573 "Host initialization retries exceeded. Taking adapter offline\n");
574 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
575 return;
576 }
577 }
578
579 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
cf6f10d7
BK		 580 if (!relogin) {
581 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
582 vhost->async_crq.cur = 0;
583 }
584
072b91f9 585 list_for_each_entry(tgt, &vhost->targets, queue)
5e47167b 586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 587 scsi_block_requests(vhost->host);
588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
589 vhost->job_step = ibmvfc_npiv_login;
590 wake_up(&vhost->work_wait_q);
591 }
592}
593
594/**
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
599 *
600 * Return value:
601 * 0 on success / other on failure
602 **/
603static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
604{
605 struct vio_dev *vdev = to_vio_dev(vhost->dev);
606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
607}
608
609/**
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
612 *
613 * Return value:
614 * 0 on success / other on failure
615 **/
616static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
617{
618 ibmvfc_dbg(vhost, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
620}
621
622/**
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
625 *
626 * Return value:
627 * 0 on success / other on failure
628 **/
629static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
630{
631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
633}
634
635/**
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
638 *
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
641 **/
642static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
643{
644 long rc;
645 struct vio_dev *vdev = to_vio_dev(vhost->dev);
646 struct ibmvfc_crq_queue *crq = &vhost->crq;
647
648 ibmvfc_dbg(vhost, "Releasing CRQ\n");
649 free_irq(vdev->irq, vhost);
039a0898 650 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 651 do {
652 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
653 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
654
655 vhost->state = IBMVFC_NO_CRQ;
79111d08 656 vhost->logged_in = 0;
072b91f9
BK		 657 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
658 free_page((unsigned long)crq->msgs);
659}
660
661/**
662 * ibmvfc_reenable_crq_queue - reenables the CRQ
663 * @vhost: ibmvfc host struct
664 *
665 * Return value:
666 * 0 on success / other on failure
667 **/
668static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
669{
670 int rc;
671 struct vio_dev *vdev = to_vio_dev(vhost->dev);
672
673 /* Re-enable the CRQ */
674 do {
675 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
676 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
677
678 if (rc)
679 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
680
681 return rc;
682}
683
684/**
685 * ibmvfc_reset_crq - resets a crq after a failure
686 * @vhost: ibmvfc host struct
687 *
688 * Return value:
689 * 0 on success / other on failure
690 **/
691static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
692{
693 int rc;
694 struct vio_dev *vdev = to_vio_dev(vhost->dev);
695 struct ibmvfc_crq_queue *crq = &vhost->crq;
696
697 /* Close the CRQ */
698 do {
699 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
700 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
701
702 vhost->state = IBMVFC_NO_CRQ;
79111d08 703 vhost->logged_in = 0;
072b91f9
BK		 704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
705
706 /* Clean out the queue */
707 memset(crq->msgs, 0, PAGE_SIZE);
708 crq->cur = 0;
709
710 /* And re-open it again */
711 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
712 crq->msg_token, PAGE_SIZE);
713
714 if (rc == H_CLOSED)
715 /* Adapter is good, but other end is not ready */
716 dev_warn(vhost->dev, "Partner adapter not ready\n");
717 else if (rc != 0)
718 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
719
720 return rc;
721}
722
723/**
724 * ibmvfc_valid_event - Determines if event is valid.
725 * @pool: event_pool that contains the event
726 * @evt: ibmvfc event to be checked for validity
727 *
728 * Return value:
729 * 1 if event is valid / 0 if event is not valid
730 **/
731static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
732 struct ibmvfc_event *evt)
733{
734 int index = evt - pool->events;
735 if (index < 0 || index >= pool->size) /* outside of bounds */
736 return 0;
737 if (evt != pool->events + index) /* unaligned */
738 return 0;
739 return 1;
740}
741
742/**
743 * ibmvfc_free_event - Free the specified event
744 * @evt: ibmvfc_event to be freed
745 *
746 **/
747static void ibmvfc_free_event(struct ibmvfc_event *evt)
748{
749 struct ibmvfc_host *vhost = evt->vhost;
750 struct ibmvfc_event_pool *pool = &vhost->pool;
751
752 BUG_ON(!ibmvfc_valid_event(pool, evt));
753 BUG_ON(atomic_inc_return(&evt->free) != 1);
754 list_add_tail(&evt->queue, &vhost->free);
755}
756
757/**
758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
759 * @evt: ibmvfc event struct
760 *
761 * This function does not setup any error status, that must be done
762 * before this function gets called.
763 **/
764static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
765{
766 struct scsi_cmnd *cmnd = evt->cmnd;
767
768 if (cmnd) {
769 scsi_dma_unmap(cmnd);
770 cmnd->scsi_done(cmnd);
771 }
772
ad8dcffa
BK		 773 if (evt->eh_comp)
774 complete(evt->eh_comp);
775
072b91f9
BK		 776 ibmvfc_free_event(evt);
777}
778
779/**
780 * ibmvfc_fail_request - Fail request with specified error code
781 * @evt: ibmvfc event struct
782 * @error_code: error code to fail request with
783 *
784 * Return value:
785 * none
786 **/
787static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
788{
789 if (evt->cmnd) {
790 evt->cmnd->result = (error_code << 16);
791 evt->done = ibmvfc_scsi_eh_done;
792 } else
793 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED;
794
795 list_del(&evt->queue);
796 del_timer(&evt->timer);
797 ibmvfc_trc_end(evt);
798 evt->done(evt);
799}
800
801/**
802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
803 * @vhost: ibmvfc host struct
804 * @error_code: error code to fail requests with
805 *
806 * Return value:
807 * none
808 **/
809static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
810{
811 struct ibmvfc_event *evt, *pos;
812
813 ibmvfc_dbg(vhost, "Purging all requests\n");
814 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
815 ibmvfc_fail_request(evt, error_code);
816}
817
818/**
79111d08 819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
072b91f9
BK		 820 * @vhost: struct ibmvfc host to reset
821 **/
79111d08 822static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
072b91f9
BK		 823{
824 int rc;
825
826 scsi_block_requests(vhost->host);
827 ibmvfc_purge_requests(vhost, DID_ERROR);
828 if ((rc = ibmvfc_reset_crq(vhost)) ||
829 (rc = ibmvfc_send_crq_init(vhost)) ||
830 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
831 dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
832 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
833 } else
834 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
835}
836
837/**
79111d08 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
072b91f9
BK		 839 * @vhost: struct ibmvfc host to reset
840 **/
79111d08
BK		 841static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
842{
843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
845 scsi_block_requests(vhost->host);
846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
847 vhost->job_step = ibmvfc_npiv_logout;
848 wake_up(&vhost->work_wait_q);
849 } else
850 ibmvfc_hard_reset_host(vhost);
851}
852
853/**
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
856 **/
072b91f9
BK		 857static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
858{
859 unsigned long flags;
860
861 spin_lock_irqsave(vhost->host->host_lock, flags);
862 __ibmvfc_reset_host(vhost);
863 spin_unlock_irqrestore(vhost->host->host_lock, flags);
864}
865
866/**
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
869 *
7d0e4622
BK		 870 * Returns: 1 if init will be retried / 0 if not
871 *
072b91f9 872 **/
7d0e4622 873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
072b91f9 874{
7d0e4622
BK		 875 int retry = 0;
876
072b91f9 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82
BK		 878 vhost->delay_init = 1;
879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 880 dev_err(vhost->dev,
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1c41fa82 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
072b91f9 884 __ibmvfc_reset_host(vhost);
7d0e4622 885 else {
072b91f9 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
7d0e4622
BK		 887 retry = 1;
888 }
072b91f9
BK		 889 }
890
891 wake_up(&vhost->work_wait_q);
7d0e4622 892 return retry;
072b91f9
BK		 893}
894
895/**
b3c10489 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 897 * @starget: scsi target struct
898 *
899 * Return value:
900 * ibmvfc_target struct / NULL if not found
901 **/
b3c10489 902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 903{
904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
905 struct ibmvfc_host *vhost = shost_priv(shost);
906 struct ibmvfc_target *tgt;
907
908 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 909 if (tgt->target_id == starget->id) {
910 kref_get(&tgt->kref);
072b91f9 911 return tgt;
b3c10489 912 }
072b91f9
BK		 913 return NULL;
914}
915
916/**
b3c10489 917 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 918 * @starget: scsi target struct
919 *
920 * Return value:
921 * ibmvfc_target struct / NULL if not found
922 **/
b3c10489 923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 924{
925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
926 struct ibmvfc_target *tgt;
927 unsigned long flags;
928
929 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 930 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 931 spin_unlock_irqrestore(shost->host_lock, flags);
932 return tgt;
933}
934
935/**
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
938 *
939 * Return value:
940 * none
941 **/
942static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
943{
944 struct ibmvfc_host *vhost = shost_priv(shost);
945 unsigned long flags;
946
947 spin_lock_irqsave(shost->host_lock, flags);
948 if (vhost->state == IBMVFC_ACTIVE) {
949 switch (vhost->login_buf->resp.link_speed / 100) {
950 case 1:
951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
952 break;
953 case 2:
954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
955 break;
956 case 4:
957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
958 break;
959 case 8:
960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
961 break;
962 case 10:
963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
964 break;
965 case 16:
966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
967 break;
968 default:
775a42ec 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
072b91f9
BK		 970 vhost->login_buf->resp.link_speed / 100);
971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
972 break;
973 }
974 } else
975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
976 spin_unlock_irqrestore(shost->host_lock, flags);
977}
978
979/**
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
982 *
983 * Return value:
984 * none
985 **/
986static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
987{
988 struct ibmvfc_host *vhost = shost_priv(shost);
989 unsigned long flags;
990
991 spin_lock_irqsave(shost->host_lock, flags);
992 switch (vhost->state) {
993 case IBMVFC_INITIALIZING:
994 case IBMVFC_ACTIVE:
995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
996 break;
997 case IBMVFC_LINK_DOWN:
998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
999 break;
1000 case IBMVFC_LINK_DEAD:
1001 case IBMVFC_HOST_OFFLINE:
1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1003 break;
1004 case IBMVFC_HALTED:
1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1006 break;
0ae808e0
BK		 1007 case IBMVFC_NO_CRQ:
1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1009 break;
072b91f9
BK		 1010 default:
1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1013 break;
1014 }
1015 spin_unlock_irqrestore(shost->host_lock, flags);
1016}
1017
1018/**
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1022 *
1023 * Return value:
1024 * none
1025 **/
1026static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1027{
1028 if (timeout)
1029 rport->dev_loss_tmo = timeout;
1030 else
1031 rport->dev_loss_tmo = 1;
1032}
1033
b3c10489
BK		 1034/**
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1037 *
1038 **/
1039static void ibmvfc_release_tgt(struct kref *kref)
1040{
1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1042 kfree(tgt);
1043}
1044
072b91f9
BK		 1045/**
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1048 *
1049 * Return value:
1050 * none
1051 **/
1052static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1053{
b3c10489 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1056 if (tgt)
1057 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1058}
1059
1060/**
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1063 *
1064 * Return value:
1065 * none
1066 **/
1067static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1068{
b3c10489 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1071 if (tgt)
1072 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1073}
1074
1075/**
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1078 *
1079 * Return value:
1080 * none
1081 **/
1082static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1083{
b3c10489 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1086 if (tgt)
1087 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1088}
1089
1090/**
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1093 *
1094 * Return value:
1095 * 0 on success / other on failure
1096 **/
1097static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1098{
1099 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1100 ((vhost->state == IBMVFC_ACTIVE ||
1101 vhost->state == IBMVFC_HOST_OFFLINE ||
1102 vhost->state == IBMVFC_LINK_DEAD) &&
1103 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1104 (init_timeout * HZ));
1105
1106 return timeout ? 0 : -EIO;
1107}
1108
1109/**
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1112 *
1113 * Return value:
1114 * 0 on success / other on failure
1115 **/
1116static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1117{
1118 struct ibmvfc_host *vhost = shost_priv(shost);
1119
1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost);
1122 return ibmvfc_wait_while_resetting(vhost);
1123}
1124
1125/**
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1127 *
1128 * Return value:
1129 * none
1130 **/
1131static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1132{
1133 struct device_node *rootdn;
1134 const char *name;
1135 const unsigned int *num;
1136
1137 rootdn = of_find_node_by_path("/");
1138 if (!rootdn)
1139 return;
1140
1141 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1142 if (name)
1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1144 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1145 if (num)
1146 vhost->partition_number = *num;
1147 of_node_put(rootdn);
1148}
1149
1150/**
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1153 *
1154 * Return value:
1155 * none
1156 **/
1157static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1158{
1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1160 struct device_node *of_node = vhost->dev->archdata.of_node;
1161 const char *location;
1162
1163 memset(login_info, 0, sizeof(*login_info));
1164
1165 login_info->ostype = IBMVFC_OS_LINUX;
1166 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9;
1167 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu);
1168 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp);
1169 login_info->partition_num = vhost->partition_number;
1170 login_info->vfc_frame_version = 1;
1171 login_info->fcp_version = 3;
497f9c50 1172 login_info->flags = IBMVFC_FLUSH_ON_HALT;
072b91f9 1173 if (vhost->client_migrated)
497f9c50 1174 login_info->flags |= IBMVFC_CLIENT_MIGRATED;
072b91f9
BK		 1175
1176 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1177 login_info->capabilities = IBMVFC_CAN_MIGRATE;
1178 login_info->async.va = vhost->async_crq.msg_token;
52d7e861 1179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
072b91f9
BK		 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1181 strncpy(login_info->device_name,
71610f55 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
072b91f9
BK		 1183
1184 location = of_get_property(of_node, "ibm,loc-code", NULL);
71610f55 1185 location = location ? location : dev_name(vhost->dev);
072b91f9
BK		 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1187}
1188
1189/**
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1192 *
1193 * Returns zero on success.
1194 **/
1195static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1196{
1197 int i;
1198 struct ibmvfc_event_pool *pool = &vhost->pool;
1199
1200 ENTER;
1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1203 if (!pool->events)
1204 return -ENOMEM;
1205
1206 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1207 pool->size * sizeof(*pool->iu_storage),
1208 &pool->iu_token, 0);
1209
1210 if (!pool->iu_storage) {
1211 kfree(pool->events);
1212 return -ENOMEM;
1213 }
1214
1215 for (i = 0; i < pool->size; ++i) {
1216 struct ibmvfc_event *evt = &pool->events[i];
1217 atomic_set(&evt->free, 1);
1218 evt->crq.valid = 0x80;
1219 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i);
1220 evt->xfer_iu = pool->iu_storage + i;
1221 evt->vhost = vhost;
1222 evt->ext_list = NULL;
1223 list_add_tail(&evt->queue, &vhost->free);
1224 }
1225
1226 LEAVE;
1227 return 0;
1228}
1229
1230/**
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1233 *
1234 **/
1235static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1236{
1237 int i;
1238 struct ibmvfc_event_pool *pool = &vhost->pool;
1239
1240 ENTER;
1241 for (i = 0; i < pool->size; ++i) {
1242 list_del(&pool->events[i].queue);
1243 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1244 if (pool->events[i].ext_list)
1245 dma_pool_free(vhost->sg_pool,
1246 pool->events[i].ext_list,
1247 pool->events[i].ext_list_token);
1248 }
1249
1250 kfree(pool->events);
1251 dma_free_coherent(vhost->dev,
1252 pool->size * sizeof(*pool->iu_storage),
1253 pool->iu_storage, pool->iu_token);
1254 LEAVE;
1255}
1256
1257/**
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1260 *
1261 * Returns a free event from the pool.
1262 **/
1263static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1264{
1265 struct ibmvfc_event *evt;
1266
1267 BUG_ON(list_empty(&vhost->free));
1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1269 atomic_set(&evt->free, 0);
1270 list_del(&evt->queue);
1271 return evt;
1272}
1273
1274/**
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1276 * required.
1277 * @evt: The event
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1280 **/
1281static void ibmvfc_init_event(struct ibmvfc_event *evt,
1282 void (*done) (struct ibmvfc_event *), u8 format)
1283{
1284 evt->cmnd = NULL;
1285 evt->sync_iu = NULL;
1286 evt->crq.format = format;
1287 evt->done = done;
ad8dcffa 1288 evt->eh_comp = NULL;
072b91f9
BK		 1289}
1290
1291/**
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1296 **/
1297static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1298 struct srp_direct_buf *md)
1299{
1300 int i;
1301 struct scatterlist *sg;
1302
1303 scsi_for_each_sg(scmd, sg, nseg, i) {
1304 md[i].va = sg_dma_address(sg);
1305 md[i].len = sg_dma_len(sg);
1306 md[i].key = 0;
1307 }
1308}
1309
1310/**
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
1312 * @scmd: Scsi_Cmnd with the scatterlist
1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1316 *
1317 * Returns:
1318 * 0 on success / non-zero on failure
1319 **/
1320static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1321 struct ibmvfc_event *evt,
1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1323{
1324
1325 int sg_mapped;
1326 struct srp_direct_buf *data = &vfc_cmd->ioba;
1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1328
1329 sg_mapped = scsi_dma_map(scmd);
1330 if (!sg_mapped) {
1331 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC;
1332 return 0;
1333 } else if (unlikely(sg_mapped < 0)) {
1334 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1335 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1336 return sg_mapped;
1337 }
1338
1339 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1340 vfc_cmd->flags |= IBMVFC_WRITE;
1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1342 } else {
1343 vfc_cmd->flags |= IBMVFC_READ;
1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1345 }
1346
1347 if (sg_mapped == 1) {
1348 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1349 return 0;
1350 }
1351
1352 vfc_cmd->flags |= IBMVFC_SCATTERLIST;
1353
1354 if (!evt->ext_list) {
1355 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1356 &evt->ext_list_token);
1357
1358 if (!evt->ext_list) {
64b840dd
BK		 1359 scsi_dma_unmap(scmd);
1360 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1361 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
072b91f9
BK		 1362 return -ENOMEM;
1363 }
1364 }
1365
1366 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1367
1368 data->va = evt->ext_list_token;
1369 data->len = sg_mapped * sizeof(struct srp_direct_buf);
1370 data->key = 0;
1371 return 0;
1372}
1373
1374/**
1375 * ibmvfc_timeout - Internal command timeout handler
1376 * @evt: struct ibmvfc_event that timed out
1377 *
1378 * Called when an internally generated command times out
1379 **/
1380static void ibmvfc_timeout(struct ibmvfc_event *evt)
1381{
1382 struct ibmvfc_host *vhost = evt->vhost;
1383 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1384 ibmvfc_reset_host(vhost);
1385}
1386
1387/**
1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1389 * @evt: event to be sent
1390 * @vhost: ibmvfc host struct
1391 * @timeout: timeout in seconds - 0 means do not time command
1392 *
1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1394 **/
1395static int ibmvfc_send_event(struct ibmvfc_event *evt,
1396 struct ibmvfc_host *vhost, unsigned long timeout)
1397{
1398 u64 *crq_as_u64 = (u64 *) &evt->crq;
1399 int rc;
1400
1401 /* Copy the IU into the transfer area */
1402 *evt->xfer_iu = evt->iu;
1403 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1404 evt->xfer_iu->cmd.tag = (u64)evt;
1405 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1406 evt->xfer_iu->mad_common.tag = (u64)evt;
1407 else
1408 BUG();
1409
1410 list_add_tail(&evt->queue, &vhost->sent);
1411 init_timer(&evt->timer);
1412
1413 if (timeout) {
1414 evt->timer.data = (unsigned long) evt;
1415 evt->timer.expires = jiffies + (timeout * HZ);
1416 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout;
1417 add_timer(&evt->timer);
1418 }
1419
a528ab7a
BK		 1420 mb();
1421
072b91f9
BK		 1422 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
1423 list_del(&evt->queue);
1424 del_timer(&evt->timer);
1425
1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1427 * Firmware will send a CRQ with a transport event (0xFF) to
1428 * tell this client what has happened to the transport. This
1429 * will be handled in ibmvfc_handle_crq()
1430 */
1431 if (rc == H_CLOSED) {
1432 if (printk_ratelimit())
1433 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1434 if (evt->cmnd)
1435 scsi_dma_unmap(evt->cmnd);
1436 ibmvfc_free_event(evt);
1437 return SCSI_MLQUEUE_HOST_BUSY;
1438 }
1439
1440 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1441 if (evt->cmnd) {
1442 evt->cmnd->result = DID_ERROR << 16;
1443 evt->done = ibmvfc_scsi_eh_done;
1444 } else
1445 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR;
1446
1447 evt->done(evt);
1448 } else
1449 ibmvfc_trc_start(evt);
1450
1451 return 0;
1452}
1453
1454/**
1455 * ibmvfc_log_error - Log an error for the failed command if appropriate
1456 * @evt: ibmvfc event to log
1457 *
1458 **/
1459static void ibmvfc_log_error(struct ibmvfc_event *evt)
1460{
1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1462 struct ibmvfc_host *vhost = evt->vhost;
1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1464 struct scsi_cmnd *cmnd = evt->cmnd;
1465 const char *err = unknown_error;
1466 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
1467 int logerr = 0;
1468 int rsp_code = 0;
1469
1470 if (index >= 0) {
1471 logerr = cmd_status[index].log;
1472 err = cmd_status[index].name;
1473 }
1474
0ae808e0 1475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1476 return;
1477
1478 if (rsp->flags & FCP_RSP_LEN_VALID)
1479 rsp_code = rsp->data.info.rsp_code;
1480
1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1485}
1486
6d29cc56
BK		 1487/**
1488 * ibmvfc_relogin - Log back into the specified device
1489 * @sdev: scsi device struct
1490 *
1491 **/
1492static void ibmvfc_relogin(struct scsi_device *sdev)
1493{
1494 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1495 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1496 struct ibmvfc_target *tgt;
1497
1498 list_for_each_entry(tgt, &vhost->targets, queue) {
1499 if (rport == tgt->rport) {
1500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1501 break;
1502 }
1503 }
1504
1505 ibmvfc_reinit_host(vhost);
1506}
1507
072b91f9
BK		 1508/**
1509 * ibmvfc_scsi_done - Handle responses from commands
1510 * @evt: ibmvfc event to be handled
1511 *
1512 * Used as a callback when sending scsi cmds.
1513 **/
1514static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1515{
1516 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1517 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1518 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d
BK		 1519 u32 rsp_len = 0;
1520 u32 sense_len = rsp->fcp_sense_len;
072b91f9
BK		 1521
1522 if (cmnd) {
1523 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID)
1524 scsi_set_resid(cmnd, vfc_cmd->adapter_resid);
1525 else if (rsp->flags & FCP_RESID_UNDER)
1526 scsi_set_resid(cmnd, rsp->fcp_resid);
1527 else
1528 scsi_set_resid(cmnd, 0);
1529
1530 if (vfc_cmd->status) {
1531 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1532
1533 if (rsp->flags & FCP_RSP_LEN_VALID)
1534 rsp_len = rsp->fcp_rsp_len;
1535 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1536 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1537 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9 1538 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
646d3857 1539 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
6d29cc56 1540 ibmvfc_relogin(cmnd->device);
072b91f9 1541
50119dad
BK		 1542 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1543 cmnd->result = (DID_ERROR << 16);
1544
072b91f9
BK		 1545 ibmvfc_log_error(evt);
1546 }
1547
1548 if (!cmnd->result &&
1549 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1550 cmnd->result = (DID_ERROR << 16);
1551
1552 scsi_dma_unmap(cmnd);
1553 cmnd->scsi_done(cmnd);
1554 }
1555
ad8dcffa
BK		 1556 if (evt->eh_comp)
1557 complete(evt->eh_comp);
1558
072b91f9
BK		 1559 ibmvfc_free_event(evt);
1560}
1561
1562/**
1563 * ibmvfc_host_chkready - Check if the host can accept commands
1564 * @vhost: struct ibmvfc host
1565 *
1566 * Returns:
1567 * 1 if host can accept command / 0 if not
1568 **/
1569static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1570{
1571 int result = 0;
1572
1573 switch (vhost->state) {
1574 case IBMVFC_LINK_DEAD:
1575 case IBMVFC_HOST_OFFLINE:
1576 result = DID_NO_CONNECT << 16;
1577 break;
1578 case IBMVFC_NO_CRQ:
1579 case IBMVFC_INITIALIZING:
1580 case IBMVFC_HALTED:
1581 case IBMVFC_LINK_DOWN:
1582 result = DID_REQUEUE << 16;
1583 break;
1584 case IBMVFC_ACTIVE:
1585 result = 0;
1586 break;
1587 };
1588
1589 return result;
1590}
1591
1592/**
1593 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1594 * @cmnd: struct scsi_cmnd to be executed
1595 * @done: Callback function to be called when cmnd is completed
1596 *
1597 * Returns:
1598 * 0 on success / other on failure
1599 **/
1600static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd,
1601 void (*done) (struct scsi_cmnd *))
1602{
1603 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1604 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1605 struct ibmvfc_cmd *vfc_cmd;
1606 struct ibmvfc_event *evt;
1607 u8 tag[2];
1608 int rc;
1609
1610 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1611 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1612 cmnd->result = rc;
1613 done(cmnd);
1614 return 0;
1615 }
1616
1617 cmnd->result = (DID_OK << 16);
1618 evt = ibmvfc_get_event(vhost);
1619 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1620 evt->cmnd = cmnd;
1621 cmnd->scsi_done = done;
1622 vfc_cmd = &evt->iu.cmd;
1623 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1624 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1625 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp);
1626 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE;
1627 vfc_cmd->payload_len = sizeof(vfc_cmd->iu);
1628 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp);
1629 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata;
1630 vfc_cmd->tgt_scsi_id = rport->port_id;
072b91f9
BK		 1631 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd);
1632 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1633 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1634
1635 if (scsi_populate_tag_msg(cmnd, tag)) {
1636 vfc_cmd->task_tag = tag[1];
1637 switch (tag[0]) {
1638 case MSG_SIMPLE_TAG:
1639 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
1640 break;
1641 case MSG_HEAD_TAG:
1642 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE;
1643 break;
1644 case MSG_ORDERED_TAG:
1645 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK;
1646 break;
1647 };
1648 }
1649
1650 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1651 return ibmvfc_send_event(evt, vhost, 0);
1652
1653 ibmvfc_free_event(evt);
1654 if (rc == -ENOMEM)
1655 return SCSI_MLQUEUE_HOST_BUSY;
1656
1657 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1658 scmd_printk(KERN_ERR, cmnd,
1659 "Failed to map DMA buffer for command. rc=%d\n", rc);
1660
1661 cmnd->result = DID_ERROR << 16;
1662 done(cmnd);
1663 return 0;
1664}
1665
1666/**
1667 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1668 * @evt: ibmvfc event struct
1669 *
1670 **/
1671static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1672{
1673 /* copy the response back */
1674 if (evt->sync_iu)
1675 *evt->sync_iu = *evt->xfer_iu;
1676
1677 complete(&evt->comp);
1678}
1679
1680/**
1681 * ibmvfc_reset_device - Reset the device with the specified reset type
1682 * @sdev: scsi device to reset
1683 * @type: reset type
1684 * @desc: reset type description for log messages
1685 *
1686 * Returns:
1687 * 0 on success / other on failure
1688 **/
1689static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1690{
1691 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1692 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1693 struct ibmvfc_cmd *tmf;
50ed9a00 1694 struct ibmvfc_event *evt = NULL;
072b91f9
BK		 1695 union ibmvfc_iu rsp_iu;
1696 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1697 int rsp_rc = -EBUSY;
1698 unsigned long flags;
1699 int rsp_code = 0;
1700
1701 spin_lock_irqsave(vhost->host->host_lock, flags);
1702 if (vhost->state == IBMVFC_ACTIVE) {
1703 evt = ibmvfc_get_event(vhost);
1704 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1705
1706 tmf = &evt->iu.cmd;
1707 memset(tmf, 0, sizeof(*tmf));
1708 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1709 tmf->resp.len = sizeof(tmf->rsp);
1710 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1711 tmf->payload_len = sizeof(tmf->iu);
1712 tmf->resp_len = sizeof(tmf->rsp);
1713 tmf->cancel_key = (unsigned long)sdev->hostdata;
1714 tmf->tgt_scsi_id = rport->port_id;
1715 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1716 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1717 tmf->iu.tmf_flags = type;
1718 evt->sync_iu = &rsp_iu;
1719
1720 init_completion(&evt->comp);
1721 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1722 }
1723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1724
1725 if (rsp_rc != 0) {
1726 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1727 desc, rsp_rc);
1728 return -EIO;
1729 }
1730
1731 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
1732 wait_for_completion(&evt->comp);
1733
230934a6
BK		 1734 if (rsp_iu.cmd.status)
1735 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
1736
1737 if (rsp_code) {
072b91f9
BK		 1738 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1739 rsp_code = fc_rsp->data.info.rsp_code;
1740
1741 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
1742 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1743 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1744 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1745 fc_rsp->scsi_status);
1746 rsp_rc = -EIO;
1747 } else
1748 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
1749
1750 spin_lock_irqsave(vhost->host->host_lock, flags);
1751 ibmvfc_free_event(evt);
1752 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1753 return rsp_rc;
1754}
1755
1756/**
1757 * ibmvfc_abort_task_set - Abort outstanding commands to the device
1758 * @sdev: scsi device to abort commands
1759 *
1760 * This sends an Abort Task Set to the VIOS for the specified device. This does
1761 * NOT send any cancel to the VIOS. That must be done separately.
1762 *
1763 * Returns:
1764 * 0 on success / other on failure
1765 **/
1766static int ibmvfc_abort_task_set(struct scsi_device *sdev)
1767{
1768 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1769 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1770 struct ibmvfc_cmd *tmf;
1771 struct ibmvfc_event *evt, *found_evt;
1772 union ibmvfc_iu rsp_iu;
1773 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1774 int rsp_rc = -EBUSY;
1775 unsigned long flags;
1776 int rsp_code = 0;
1777
1778 spin_lock_irqsave(vhost->host->host_lock, flags);
1779 found_evt = NULL;
1780 list_for_each_entry(evt, &vhost->sent, queue) {
1781 if (evt->cmnd && evt->cmnd->device == sdev) {
1782 found_evt = evt;
1783 break;
1784 }
1785 }
1786
1787 if (!found_evt) {
1788 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1789 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
1790 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1791 return 0;
1792 }
1793
1794 if (vhost->state == IBMVFC_ACTIVE) {
1795 evt = ibmvfc_get_event(vhost);
1796 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1797
1798 tmf = &evt->iu.cmd;
1799 memset(tmf, 0, sizeof(*tmf));
1800 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1801 tmf->resp.len = sizeof(tmf->rsp);
1802 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1803 tmf->payload_len = sizeof(tmf->iu);
1804 tmf->resp_len = sizeof(tmf->rsp);
1805 tmf->cancel_key = (unsigned long)sdev->hostdata;
1806 tmf->tgt_scsi_id = rport->port_id;
1807 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1808 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1809 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
1810 evt->sync_iu = &rsp_iu;
1811
1812 init_completion(&evt->comp);
1813 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1814 }
1815
1816 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1817
1818 if (rsp_rc != 0) {
1819 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
1820 return -EIO;
1821 }
1822
1823 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
1824 wait_for_completion(&evt->comp);
1825
230934a6
BK		 1826 if (rsp_iu.cmd.status)
1827 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
1828
1829 if (rsp_code) {
072b91f9
BK		 1830 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
1831 rsp_code = fc_rsp->data.info.rsp_code;
1832
1833 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
1834 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
1835 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
1836 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
1837 fc_rsp->scsi_status);
1838 rsp_rc = -EIO;
1839 } else
1840 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
1841
1842 spin_lock_irqsave(vhost->host->host_lock, flags);
1843 ibmvfc_free_event(evt);
1844 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1845 return rsp_rc;
1846}
1847
1848/**
1849 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
1850 * @sdev: scsi device to cancel commands
1851 * @type: type of error recovery being performed
1852 *
1853 * This sends a cancel to the VIOS for the specified device. This does
1854 * NOT send any abort to the actual device. That must be done separately.
1855 *
1856 * Returns:
1857 * 0 on success / other on failure
1858 **/
1859static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
1860{
1861 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 1862 struct scsi_target *starget = scsi_target(sdev);
1863 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 1864 struct ibmvfc_tmf *tmf;
1865 struct ibmvfc_event *evt, *found_evt;
1866 union ibmvfc_iu rsp;
1867 int rsp_rc = -EBUSY;
1868 unsigned long flags;
1869 u16 status;
1870
1871 ENTER;
1872 spin_lock_irqsave(vhost->host->host_lock, flags);
1873 found_evt = NULL;
1874 list_for_each_entry(evt, &vhost->sent, queue) {
1875 if (evt->cmnd && evt->cmnd->device == sdev) {
1876 found_evt = evt;
1877 break;
1878 }
1879 }
1880
1881 if (!found_evt) {
1882 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1883 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
1884 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1885 return 0;
1886 }
1887
1888 if (vhost->state == IBMVFC_ACTIVE) {
1889 evt = ibmvfc_get_event(vhost);
1890 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1891
1892 tmf = &evt->iu.tmf;
1893 memset(tmf, 0, sizeof(*tmf));
1894 tmf->common.version = 1;
1895 tmf->common.opcode = IBMVFC_TMF_MAD;
1896 tmf->common.length = sizeof(*tmf);
1897 tmf->scsi_id = rport->port_id;
1898 int_to_scsilun(sdev->lun, &tmf->lun);
1899 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
1900 tmf->cancel_key = (unsigned long)sdev->hostdata;
ad8dcffa 1901 tmf->my_cancel_key = (unsigned long)starget->hostdata;
072b91f9
BK		 1902
1903 evt->sync_iu = &rsp;
1904 init_completion(&evt->comp);
1905 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1906 }
1907
1908 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1909
1910 if (rsp_rc != 0) {
1911 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
1912 return -EIO;
1913 }
1914
1915 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
1916
1917 wait_for_completion(&evt->comp);
1918 status = rsp.mad_common.status;
1919 spin_lock_irqsave(vhost->host->host_lock, flags);
1920 ibmvfc_free_event(evt);
1921 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1922
1923 if (status != IBMVFC_MAD_SUCCESS) {
1924 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
1925 return -EIO;
1926 }
1927
1928 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
1929 return 0;
1930}
1931
ad8dcffa
BK		 1932/**
1933 * ibmvfc_match_target - Match function for specified target
1934 * @evt: ibmvfc event struct
1935 * @device: device to match (starget)
1936 *
1937 * Returns:
1938 * 1 if event matches starget / 0 if event does not match starget
1939 **/
1940static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
1941{
1942 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
1943 return 1;
1944 return 0;
1945}
1946
1947/**
1948 * ibmvfc_match_lun - Match function for specified LUN
1949 * @evt: ibmvfc event struct
1950 * @device: device to match (sdev)
1951 *
1952 * Returns:
1953 * 1 if event matches sdev / 0 if event does not match sdev
1954 **/
1955static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
1956{
1957 if (evt->cmnd && evt->cmnd->device == device)
1958 return 1;
1959 return 0;
1960}
1961
1962/**
1963 * ibmvfc_wait_for_ops - Wait for ops to complete
1964 * @vhost: ibmvfc host struct
1965 * @device: device to match (starget or sdev)
1966 * @match: match function
1967 *
1968 * Returns:
1969 * SUCCESS / FAILED
1970 **/
1971static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
1972 int (*match) (struct ibmvfc_event *, void *))
1973{
1974 struct ibmvfc_event *evt;
1975 DECLARE_COMPLETION_ONSTACK(comp);
1976 int wait;
1977 unsigned long flags;
1978 signed long timeout = init_timeout * HZ;
1979
1980 ENTER;
1981 do {
1982 wait = 0;
1983 spin_lock_irqsave(vhost->host->host_lock, flags);
1984 list_for_each_entry(evt, &vhost->sent, queue) {
1985 if (match(evt, device)) {
1986 evt->eh_comp = &comp;
1987 wait++;
1988 }
1989 }
1990 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1991
1992 if (wait) {
1993 timeout = wait_for_completion_timeout(&comp, timeout);
1994
1995 if (!timeout) {
1996 wait = 0;
1997 spin_lock_irqsave(vhost->host->host_lock, flags);
1998 list_for_each_entry(evt, &vhost->sent, queue) {
1999 if (match(evt, device)) {
2000 evt->eh_comp = NULL;
2001 wait++;
2002 }
2003 }
2004 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2005 if (wait)
2006 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2007 LEAVE;
2008 return wait ? FAILED : SUCCESS;
2009 }
2010 }
2011 } while (wait);
2012
2013 LEAVE;
2014 return SUCCESS;
2015}
2016
072b91f9
BK		 2017/**
2018 * ibmvfc_eh_abort_handler - Abort a command
2019 * @cmd: scsi command to abort
2020 *
2021 * Returns:
2022 * SUCCESS / FAILED
2023 **/
2024static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2025{
ad8dcffa
BK		 2026 struct scsi_device *sdev = cmd->device;
2027 struct ibmvfc_host *vhost = shost_priv(sdev->host);
072b91f9 2028 int cancel_rc, abort_rc;
ad8dcffa 2029 int rc = FAILED;
072b91f9
BK		 2030
2031 ENTER;
2032 ibmvfc_wait_while_resetting(vhost);
ad8dcffa
BK		 2033 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2034 abort_rc = ibmvfc_abort_task_set(sdev);
072b91f9 2035
ad8dcffa
BK		 2036 if (!cancel_rc && !abort_rc)
2037 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9
BK		 2038
2039 LEAVE;
ad8dcffa 2040 return rc;
072b91f9
BK		 2041}
2042
2043/**
2044 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2045 * @cmd: scsi command struct
2046 *
2047 * Returns:
2048 * SUCCESS / FAILED
2049 **/
2050static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2051{
ad8dcffa
BK		 2052 struct scsi_device *sdev = cmd->device;
2053 struct ibmvfc_host *vhost = shost_priv(sdev->host);
072b91f9 2054 int cancel_rc, reset_rc;
ad8dcffa 2055 int rc = FAILED;
072b91f9
BK		 2056
2057 ENTER;
2058 ibmvfc_wait_while_resetting(vhost);
ad8dcffa
BK		 2059 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2060 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
072b91f9 2061
ad8dcffa
BK		 2062 if (!cancel_rc && !reset_rc)
2063 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9
BK		 2064
2065 LEAVE;
ad8dcffa 2066 return rc;
072b91f9
BK		 2067}
2068
2069/**
2070 * ibmvfc_dev_cancel_all - Device iterated cancel all function
2071 * @sdev: scsi device struct
2072 * @data: return code
2073 *
2074 **/
2075static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data)
2076{
2077 unsigned long *rc = data;
2078 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2079}
2080
2081/**
2082 * ibmvfc_dev_abort_all - Device iterated abort task set function
2083 * @sdev: scsi device struct
2084 * @data: return code
2085 *
2086 **/
2087static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2088{
2089 unsigned long *rc = data;
2090 *rc |= ibmvfc_abort_task_set(sdev);
2091}
2092
2093/**
2094 * ibmvfc_eh_target_reset_handler - Reset the target
2095 * @cmd: scsi command struct
2096 *
2097 * Returns:
2098 * SUCCESS / FAILED
2099 **/
2100static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2101{
ad8dcffa
BK		 2102 struct scsi_device *sdev = cmd->device;
2103 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2104 struct scsi_target *starget = scsi_target(sdev);
072b91f9 2105 int reset_rc;
ad8dcffa 2106 int rc = FAILED;
072b91f9 2107 unsigned long cancel_rc = 0;
072b91f9
BK		 2108
2109 ENTER;
2110 ibmvfc_wait_while_resetting(vhost);
2111 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
ad8dcffa 2112 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
072b91f9 2113
ad8dcffa
BK		 2114 if (!cancel_rc && !reset_rc)
2115 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9
BK		 2116
2117 LEAVE;
ad8dcffa 2118 return rc;
072b91f9
BK		 2119}
2120
2121/**
2122 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2123 * @cmd: struct scsi_cmnd having problems
2124 *
2125 **/
2126static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2127{
2128 int rc;
2129 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2130
2131 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2132 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2133 return rc ? FAILED : SUCCESS;
2134}
2135
2136/**
2137 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2138 * @rport: rport struct
2139 *
2140 * Return value:
2141 * none
2142 **/
2143static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2144{
2145 struct scsi_target *starget = to_scsi_target(&rport->dev);
2146 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2147 struct ibmvfc_host *vhost = shost_priv(shost);
072b91f9
BK		 2148 unsigned long cancel_rc = 0;
2149 unsigned long abort_rc = 0;
ad8dcffa 2150 int rc = FAILED;
072b91f9
BK		 2151
2152 ENTER;
2153 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
2154 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2155
ad8dcffa
BK		 2156 if (!cancel_rc && !abort_rc)
2157 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2158
2159 if (rc == FAILED)
072b91f9 2160 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2161 LEAVE;
2162}
2163
2164static const struct {
2165 enum ibmvfc_async_event ae;
2166 const char *desc;
2167} ae_desc [] = {
2168 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2169 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2170 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2171 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2172 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2173 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2174 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2175 { IBMVFC_AE_LINK_UP, "Link Up" },
2176 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2177 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2178 { IBMVFC_AE_HALT, "Halt" },
2179 { IBMVFC_AE_RESUME, "Resume" },
2180 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2181};
2182
2183static const char *unknown_ae = "Unknown async";
2184
2185/**
2186 * ibmvfc_get_ae_desc - Get text description for async event
2187 * @ae: async event
2188 *
2189 **/
2190static const char *ibmvfc_get_ae_desc(u64 ae)
2191{
2192 int i;
2193
2194 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2195 if (ae_desc[i].ae == ae)
2196 return ae_desc[i].desc;
2197
2198 return unknown_ae;
2199}
2200
2201/**
2202 * ibmvfc_handle_async - Handle an async event from the adapter
2203 * @crq: crq to process
2204 * @vhost: ibmvfc host struct
2205 *
2206 **/
2207static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2208 struct ibmvfc_host *vhost)
2209{
2210 const char *desc = ibmvfc_get_ae_desc(crq->event);
6d29cc56 2211 struct ibmvfc_target *tgt;
072b91f9 2212
775a42ec
SR		 2213 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2214 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
072b91f9
BK		 2215
2216 switch (crq->event) {
072b91f9 2217 case IBMVFC_AE_RESUME:
497f9c50
BK		 2218 switch (crq->link_state) {
2219 case IBMVFC_AE_LS_LINK_DOWN:
2220 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2221 break;
2222 case IBMVFC_AE_LS_LINK_DEAD:
2223 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2224 break;
2225 case IBMVFC_AE_LS_LINK_UP:
2226 case IBMVFC_AE_LS_LINK_BOUNCED:
2227 default:
2228 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2229 vhost->delay_init = 1;
2230 __ibmvfc_reset_host(vhost);
2231 break;
2232 };
2233
2234 break;
2235 case IBMVFC_AE_LINK_UP:
072b91f9 2236 vhost->events_to_log |= IBMVFC_AE_LINKUP;
d2131b33
BK		 2237 vhost->delay_init = 1;
2238 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2239 break;
2240 case IBMVFC_AE_SCN_FABRIC:
d2131b33 2241 case IBMVFC_AE_SCN_DOMAIN:
072b91f9 2242 vhost->events_to_log |= IBMVFC_AE_RSCN;
d2131b33
BK		 2243 vhost->delay_init = 1;
2244 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2245 break;
2246 case IBMVFC_AE_SCN_NPORT:
2247 case IBMVFC_AE_SCN_GROUP:
072b91f9 2248 vhost->events_to_log |= IBMVFC_AE_RSCN;
6d29cc56
BK		 2249 ibmvfc_reinit_host(vhost);
2250 break;
072b91f9
BK		 2251 case IBMVFC_AE_ELS_LOGO:
2252 case IBMVFC_AE_ELS_PRLO:
2253 case IBMVFC_AE_ELS_PLOGI:
6d29cc56
BK		 2254 list_for_each_entry(tgt, &vhost->targets, queue) {
2255 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2256 break;
2257 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id)
2258 continue;
2259 if (crq->wwpn && tgt->ids.port_name != crq->wwpn)
2260 continue;
2261 if (crq->node_name && tgt->ids.node_name != crq->node_name)
2262 continue;
017b2ae3
BK		 2263 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO)
2264 tgt->logo_rcvd = 1;
2265 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) {
2266 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2267 ibmvfc_reinit_host(vhost);
2268 }
6d29cc56 2269 }
072b91f9
BK		 2270 break;
2271 case IBMVFC_AE_LINK_DOWN:
2272 case IBMVFC_AE_ADAPTER_FAILED:
2273 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2274 break;
2275 case IBMVFC_AE_LINK_DEAD:
2276 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2277 break;
2278 case IBMVFC_AE_HALT:
2279 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2280 break;
2281 default:
775a42ec 2282 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
072b91f9
BK		 2283 break;
2284 };
2285}
2286
2287/**
2288 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2289 * @crq: Command/Response queue
2290 * @vhost: ibmvfc host struct
2291 *
2292 **/
2293static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2294{
2295 long rc;
2296 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2297
2298 switch (crq->valid) {
2299 case IBMVFC_CRQ_INIT_RSP:
2300 switch (crq->format) {
2301 case IBMVFC_CRQ_INIT:
2302 dev_info(vhost->dev, "Partner initialized\n");
2303 /* Send back a response */
2304 rc = ibmvfc_send_crq_init_complete(vhost);
2305 if (rc == 0)
cf6f10d7 2306 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2307 else
2308 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2309 break;
2310 case IBMVFC_CRQ_INIT_COMPLETE:
2311 dev_info(vhost->dev, "Partner initialization complete\n");
cf6f10d7 2312 ibmvfc_init_host(vhost, 0);
072b91f9
BK		 2313 break;
2314 default:
2315 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2316 }
2317 return;
2318 case IBMVFC_CRQ_XPORT_EVENT:
2319 vhost->state = IBMVFC_NO_CRQ;
79111d08 2320 vhost->logged_in = 0;
072b91f9
BK		 2321 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2322 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2323 /* We need to re-setup the interpartition connection */
2324 dev_info(vhost->dev, "Re-enabling adapter\n");
2325 vhost->client_migrated = 1;
2326 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2327 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2328 (rc = ibmvfc_send_crq_init(vhost))) {
2329 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2330 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2331 } else
2332 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2333 } else {
2334 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2335
2336 ibmvfc_purge_requests(vhost, DID_ERROR);
2337 if ((rc = ibmvfc_reset_crq(vhost)) ||
2338 (rc = ibmvfc_send_crq_init(vhost))) {
2339 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2340 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2341 } else
2342 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2343 }
2344 return;
2345 case IBMVFC_CRQ_CMD_RSP:
2346 break;
2347 default:
2348 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2349 return;
2350 }
2351
2352 if (crq->format == IBMVFC_ASYNC_EVENT)
2353 return;
2354
2355 /* The only kind of payload CRQs we should get are responses to
2356 * things we send. Make sure this response is to something we
2357 * actually sent
2358 */
2359 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
775a42ec 2360 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
072b91f9
BK		 2361 crq->ioba);
2362 return;
2363 }
2364
2365 if (unlikely(atomic_read(&evt->free))) {
775a42ec 2366 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
072b91f9
BK		 2367 crq->ioba);
2368 return;
2369 }
2370
2371 del_timer(&evt->timer);
2372 list_del(&evt->queue);
2373 ibmvfc_trc_end(evt);
2374 evt->done(evt);
2375}
2376
2377/**
2378 * ibmvfc_scan_finished - Check if the device scan is done.
2379 * @shost: scsi host struct
2380 * @time: current elapsed time
2381 *
2382 * Returns:
2383 * 0 if scan is not done / 1 if scan is done
2384 **/
2385static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2386{
2387 unsigned long flags;
2388 struct ibmvfc_host *vhost = shost_priv(shost);
2389 int done = 0;
2390
2391 spin_lock_irqsave(shost->host_lock, flags);
2392 if (time >= (init_timeout * HZ)) {
2393 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2394 "continuing initialization\n", init_timeout);
2395 done = 1;
2396 }
2397
43c8da90 2398 if (vhost->scan_complete)
072b91f9
BK		 2399 done = 1;
2400 spin_unlock_irqrestore(shost->host_lock, flags);
2401 return done;
2402}
2403
2404/**
2405 * ibmvfc_slave_alloc - Setup the device's task set value
2406 * @sdev: struct scsi_device device to configure
2407 *
2408 * Set the device's task set value so that error handling works as
2409 * expected.
2410 *
2411 * Returns:
2412 * 0 on success / -ENXIO if device does not exist
2413 **/
2414static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2415{
2416 struct Scsi_Host *shost = sdev->host;
2417 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2418 struct ibmvfc_host *vhost = shost_priv(shost);
2419 unsigned long flags = 0;
2420
2421 if (!rport || fc_remote_port_chkready(rport))
2422 return -ENXIO;
2423
2424 spin_lock_irqsave(shost->host_lock, flags);
2425 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2426 spin_unlock_irqrestore(shost->host_lock, flags);
2427 return 0;
2428}
2429
ad8dcffa
BK		 2430/**
2431 * ibmvfc_target_alloc - Setup the target's task set value
2432 * @starget: struct scsi_target
2433 *
2434 * Set the target's task set value so that error handling works as
2435 * expected.
2436 *
2437 * Returns:
2438 * 0 on success / -ENXIO if device does not exist
2439 **/
2440static int ibmvfc_target_alloc(struct scsi_target *starget)
2441{
2442 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2443 struct ibmvfc_host *vhost = shost_priv(shost);
2444 unsigned long flags = 0;
2445
2446 spin_lock_irqsave(shost->host_lock, flags);
2447 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2448 spin_unlock_irqrestore(shost->host_lock, flags);
2449 return 0;
2450}
2451
072b91f9
BK		 2452/**
2453 * ibmvfc_slave_configure - Configure the device
2454 * @sdev: struct scsi_device device to configure
2455 *
2456 * Enable allow_restart for a device if it is a disk. Adjust the
2457 * queue_depth here also.
2458 *
2459 * Returns:
2460 * 0
2461 **/
2462static int ibmvfc_slave_configure(struct scsi_device *sdev)
2463{
2464 struct Scsi_Host *shost = sdev->host;
2465 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2466 unsigned long flags = 0;
2467
2468 spin_lock_irqsave(shost->host_lock, flags);
2469 if (sdev->type == TYPE_DISK)
2470 sdev->allow_restart = 1;
2471
2472 if (sdev->tagged_supported) {
2473 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2474 scsi_activate_tcq(sdev, sdev->queue_depth);
2475 } else
2476 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2477
2478 rport->dev_loss_tmo = dev_loss_tmo;
2479 spin_unlock_irqrestore(shost->host_lock, flags);
2480 return 0;
2481}
2482
2483/**
2484 * ibmvfc_change_queue_depth - Change the device's queue depth
2485 * @sdev: scsi device struct
2486 * @qdepth: depth to set
2487 *
2488 * Return value:
2489 * actual depth set
2490 **/
2491static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
2492{
2493 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2494 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2495
2496 scsi_adjust_queue_depth(sdev, 0, qdepth);
2497 return sdev->queue_depth;
2498}
2499
2500/**
2501 * ibmvfc_change_queue_type - Change the device's queue type
2502 * @sdev: scsi device struct
2503 * @tag_type: type of tags to use
2504 *
2505 * Return value:
2506 * actual queue type set
2507 **/
2508static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2509{
2510 if (sdev->tagged_supported) {
2511 scsi_set_tag_type(sdev, tag_type);
2512
2513 if (tag_type)
2514 scsi_activate_tcq(sdev, sdev->queue_depth);
2515 else
2516 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2517 } else
2518 tag_type = 0;
2519
2520 return tag_type;
2521}
2522
2523static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2524 struct device_attribute *attr, char *buf)
2525{
2526 struct Scsi_Host *shost = class_to_shost(dev);
2527 struct ibmvfc_host *vhost = shost_priv(shost);
2528
2529 return snprintf(buf, PAGE_SIZE, "%s\n",
2530 vhost->login_buf->resp.partition_name);
2531}
2532
072b91f9
BK		 2533static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2534 struct device_attribute *attr, char *buf)
2535{
2536 struct Scsi_Host *shost = class_to_shost(dev);
2537 struct ibmvfc_host *vhost = shost_priv(shost);
2538
2539 return snprintf(buf, PAGE_SIZE, "%s\n",
2540 vhost->login_buf->resp.device_name);
2541}
2542
072b91f9
BK		 2543static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2544 struct device_attribute *attr, char *buf)
2545{
2546 struct Scsi_Host *shost = class_to_shost(dev);
2547 struct ibmvfc_host *vhost = shost_priv(shost);
2548
2549 return snprintf(buf, PAGE_SIZE, "%s\n",
2550 vhost->login_buf->resp.port_loc_code);
2551}
2552
072b91f9
BK		 2553static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2554 struct device_attribute *attr, char *buf)
2555{
2556 struct Scsi_Host *shost = class_to_shost(dev);
2557 struct ibmvfc_host *vhost = shost_priv(shost);
2558
2559 return snprintf(buf, PAGE_SIZE, "%s\n",
2560 vhost->login_buf->resp.drc_name);
2561}
2562
072b91f9
BK		 2563static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2564 struct device_attribute *attr, char *buf)
2565{
2566 struct Scsi_Host *shost = class_to_shost(dev);
2567 struct ibmvfc_host *vhost = shost_priv(shost);
2568 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2569}
2570
497f9c50
BK		 2571static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2572 struct device_attribute *attr, char *buf)
2573{
2574 struct Scsi_Host *shost = class_to_shost(dev);
2575 struct ibmvfc_host *vhost = shost_priv(shost);
2576 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2577}
2578
072b91f9
BK		 2579/**
2580 * ibmvfc_show_log_level - Show the adapter's error logging level
2581 * @dev: class device struct
2582 * @buf: buffer
2583 *
2584 * Return value:
2585 * number of bytes printed to buffer
2586 **/
2587static ssize_t ibmvfc_show_log_level(struct device *dev,
2588 struct device_attribute *attr, char *buf)
2589{
2590 struct Scsi_Host *shost = class_to_shost(dev);
2591 struct ibmvfc_host *vhost = shost_priv(shost);
2592 unsigned long flags = 0;
2593 int len;
2594
2595 spin_lock_irqsave(shost->host_lock, flags);
2596 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2597 spin_unlock_irqrestore(shost->host_lock, flags);
2598 return len;
2599}
2600
2601/**
2602 * ibmvfc_store_log_level - Change the adapter's error logging level
2603 * @dev: class device struct
2604 * @buf: buffer
2605 *
2606 * Return value:
2607 * number of bytes printed to buffer
2608 **/
2609static ssize_t ibmvfc_store_log_level(struct device *dev,
2610 struct device_attribute *attr,
2611 const char *buf, size_t count)
2612{
2613 struct Scsi_Host *shost = class_to_shost(dev);
2614 struct ibmvfc_host *vhost = shost_priv(shost);
2615 unsigned long flags = 0;
2616
2617 spin_lock_irqsave(shost->host_lock, flags);
2618 vhost->log_level = simple_strtoul(buf, NULL, 10);
2619 spin_unlock_irqrestore(shost->host_lock, flags);
2620 return strlen(buf);
2621}
2622
85e2399e
BK		 2623static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
2624static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
2625static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
2626static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
2627static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
497f9c50 2628static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
85e2399e
BK		 2629static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
2630 ibmvfc_show_log_level, ibmvfc_store_log_level);
072b91f9
BK		 2631
2632#ifdef CONFIG_SCSI_IBMVFC_TRACE
2633/**
2634 * ibmvfc_read_trace - Dump the adapter trace
2635 * @kobj: kobject struct
2636 * @bin_attr: bin_attribute struct
2637 * @buf: buffer
2638 * @off: offset
2639 * @count: buffer size
2640 *
2641 * Return value:
2642 * number of bytes printed to buffer
2643 **/
2644static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2645 struct bin_attribute *bin_attr,
2646 char *buf, loff_t off, size_t count)
2647{
2648 struct device *dev = container_of(kobj, struct device, kobj);
2649 struct Scsi_Host *shost = class_to_shost(dev);
2650 struct ibmvfc_host *vhost = shost_priv(shost);
2651 unsigned long flags = 0;
2652 int size = IBMVFC_TRACE_SIZE;
2653 char *src = (char *)vhost->trace;
2654
2655 if (off > size)
2656 return 0;
2657 if (off + count > size) {
2658 size -= off;
2659 count = size;
2660 }
2661
2662 spin_lock_irqsave(shost->host_lock, flags);
2663 memcpy(buf, &src[off], count);
2664 spin_unlock_irqrestore(shost->host_lock, flags);
2665 return count;
2666}
2667
2668static struct bin_attribute ibmvfc_trace_attr = {
2669 .attr = {
2670 .name = "trace",
2671 .mode = S_IRUGO,
2672 },
2673 .size = 0,
2674 .read = ibmvfc_read_trace,
2675};
2676#endif
2677
2678static struct device_attribute *ibmvfc_attrs[] = {
85e2399e
BK		 2679 &dev_attr_partition_name,
2680 &dev_attr_device_name,
2681 &dev_attr_port_loc_code,
2682 &dev_attr_drc_name,
2683 &dev_attr_npiv_version,
497f9c50 2684 &dev_attr_capabilities,
85e2399e 2685 &dev_attr_log_level,
072b91f9
BK		 2686 NULL
2687};
2688
2689static struct scsi_host_template driver_template = {
2690 .module = THIS_MODULE,
2691 .name = "IBM POWER Virtual FC Adapter",
2692 .proc_name = IBMVFC_NAME,
2693 .queuecommand = ibmvfc_queuecommand,
2694 .eh_abort_handler = ibmvfc_eh_abort_handler,
2695 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2696 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2697 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2698 .slave_alloc = ibmvfc_slave_alloc,
2699 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 2700 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 2701 .scan_finished = ibmvfc_scan_finished,
2702 .change_queue_depth = ibmvfc_change_queue_depth,
2703 .change_queue_type = ibmvfc_change_queue_type,
2704 .cmd_per_lun = 16,
2705 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2706 .this_id = -1,
2707 .sg_tablesize = SG_ALL,
2708 .max_sectors = IBMVFC_MAX_SECTORS,
2709 .use_clustering = ENABLE_CLUSTERING,
2710 .shost_attrs = ibmvfc_attrs,
2711};
2712
2713/**
2714 * ibmvfc_next_async_crq - Returns the next entry in async queue
2715 * @vhost: ibmvfc host struct
2716 *
2717 * Returns:
2718 * Pointer to next entry in queue / NULL if empty
2719 **/
2720static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
2721{
2722 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
2723 struct ibmvfc_async_crq *crq;
2724
2725 crq = &async_crq->msgs[async_crq->cur];
2726 if (crq->valid & 0x80) {
2727 if (++async_crq->cur == async_crq->size)
2728 async_crq->cur = 0;
2729 } else
2730 crq = NULL;
2731
2732 return crq;
2733}
2734
2735/**
2736 * ibmvfc_next_crq - Returns the next entry in message queue
2737 * @vhost: ibmvfc host struct
2738 *
2739 * Returns:
2740 * Pointer to next entry in queue / NULL if empty
2741 **/
2742static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
2743{
2744 struct ibmvfc_crq_queue *queue = &vhost->crq;
2745 struct ibmvfc_crq *crq;
2746
2747 crq = &queue->msgs[queue->cur];
2748 if (crq->valid & 0x80) {
2749 if (++queue->cur == queue->size)
2750 queue->cur = 0;
2751 } else
2752 crq = NULL;
2753
2754 return crq;
2755}
2756
2757/**
2758 * ibmvfc_interrupt - Interrupt handler
2759 * @irq: number of irq to handle, not used
2760 * @dev_instance: ibmvfc_host that received interrupt
2761 *
2762 * Returns:
2763 * IRQ_HANDLED
2764 **/
2765static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
2766{
2767 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
039a0898
BK		 2768 unsigned long flags;
2769
2770 spin_lock_irqsave(vhost->host->host_lock, flags);
2771 vio_disable_interrupts(to_vio_dev(vhost->dev));
2772 tasklet_schedule(&vhost->tasklet);
2773 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2774 return IRQ_HANDLED;
2775}
2776
2777/**
2778 * ibmvfc_tasklet - Interrupt handler tasklet
2779 * @data: ibmvfc host struct
2780 *
2781 * Returns:
2782 * Nothing
2783 **/
2784static void ibmvfc_tasklet(void *data)
2785{
2786 struct ibmvfc_host *vhost = data;
072b91f9
BK		 2787 struct vio_dev *vdev = to_vio_dev(vhost->dev);
2788 struct ibmvfc_crq *crq;
2789 struct ibmvfc_async_crq *async;
2790 unsigned long flags;
2791 int done = 0;
2792
2793 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 2794 while (!done) {
072b91f9
BK		 2795 /* Pull all the valid messages off the async CRQ */
2796 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
2797 ibmvfc_handle_async(async, vhost);
2798 async->valid = 0;
2799 }
2800
f1d7fb7a
BK		 2801 /* Pull all the valid messages off the CRQ */
2802 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
072b91f9
BK		 2803 ibmvfc_handle_crq(crq, vhost);
2804 crq->valid = 0;
f1d7fb7a
BK		 2805 }
2806
2807 vio_enable_interrupts(vdev);
2808 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
072b91f9
BK		 2809 vio_disable_interrupts(vdev);
2810 ibmvfc_handle_async(async, vhost);
4081b77c 2811 async->valid = 0;
f1d7fb7a
BK		 2812 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
2813 vio_disable_interrupts(vdev);
2814 ibmvfc_handle_crq(crq, vhost);
2815 crq->valid = 0;
072b91f9
BK		 2816 } else
2817 done = 1;
2818 }
2819
2820 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 2821}
2822
2823/**
2824 * ibmvfc_init_tgt - Set the next init job step for the target
2825 * @tgt: ibmvfc target struct
2826 * @job_step: job step to perform
2827 *
2828 **/
2829static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
2830 void (*job_step) (struct ibmvfc_target *))
2831{
2832 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
2833 tgt->job_step = job_step;
2834 wake_up(&tgt->vhost->work_wait_q);
2835}
2836
2837/**
2838 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
2839 * @tgt: ibmvfc target struct
2840 * @job_step: initialization job step
2841 *
7d0e4622
BK		 2842 * Returns: 1 if step will be retried / 0 if not
2843 *
072b91f9 2844 **/
7d0e4622 2845static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
072b91f9
BK		 2846 void (*job_step) (struct ibmvfc_target *))
2847{
1c41fa82 2848 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
072b91f9
BK		 2849 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2850 wake_up(&tgt->vhost->work_wait_q);
7d0e4622 2851 return 0;
072b91f9
BK		 2852 } else
2853 ibmvfc_init_tgt(tgt, job_step);
7d0e4622 2854 return 1;
072b91f9
BK		 2855}
2856
a3b7aeab
BK		 2857/* Defined in FC-LS */
2858static const struct {
2859 int code;
2860 int retry;
2861 int logged_in;
2862} prli_rsp [] = {
2863 { 0, 1, 0 },
2864 { 1, 0, 1 },
2865 { 2, 1, 0 },
2866 { 3, 1, 0 },
2867 { 4, 0, 0 },
2868 { 5, 0, 0 },
2869 { 6, 0, 1 },
2870 { 7, 0, 0 },
2871 { 8, 1, 0 },
2872};
2873
2874/**
2875 * ibmvfc_get_prli_rsp - Find PRLI response index
2876 * @flags: PRLI response flags
2877 *
2878 **/
2879static int ibmvfc_get_prli_rsp(u16 flags)
2880{
2881 int i;
2882 int code = (flags & 0x0f00) >> 8;
2883
2884 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
2885 if (prli_rsp[i].code == code)
2886 return i;
2887
2888 return 0;
2889}
2890
072b91f9
BK		 2891/**
2892 * ibmvfc_tgt_prli_done - Completion handler for Process Login
2893 * @evt: ibmvfc event struct
2894 *
2895 **/
2896static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
2897{
2898 struct ibmvfc_target *tgt = evt->tgt;
2899 struct ibmvfc_host *vhost = evt->vhost;
2900 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
a3b7aeab 2901 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
072b91f9 2902 u32 status = rsp->common.status;
7d0e4622 2903 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 2904
2905 vhost->discovery_threads--;
2906 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2907 switch (status) {
2908 case IBMVFC_MAD_SUCCESS:
a3b7aeab
BK		 2909 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
2910 parms->type, parms->flags, parms->service_parms);
2911
2912 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
2913 index = ibmvfc_get_prli_rsp(parms->flags);
2914 if (prli_rsp[index].logged_in) {
2915 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
2916 tgt->need_login = 0;
2917 tgt->ids.roles = 0;
2918 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
2919 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
2920 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
2921 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
43c8da90 2922 tgt->add_rport = 1;
a3b7aeab
BK		 2923 } else
2924 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2925 } else if (prli_rsp[index].retry)
2926 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2927 else
2928 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2929 } else
2930 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 2931 break;
2932 case IBMVFC_MAD_DRIVER_FAILED:
2933 break;
2934 case IBMVFC_MAD_CRQ_ERROR:
2935 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
2936 break;
2937 case IBMVFC_MAD_FAILED:
2938 default:
017b2ae3
BK		 2939 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED)
2940 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2941 else if (tgt->logo_rcvd)
2942 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
2943 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 2944 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499
BK		 2945 else
2946 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 2947
2948 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
2949 ibmvfc_get_cmd_error(rsp->status, rsp->error),
2950 rsp->status, rsp->error, status);
072b91f9
BK		 2951 break;
2952 };
2953
2954 kref_put(&tgt->kref, ibmvfc_release_tgt);
2955 ibmvfc_free_event(evt);
2956 wake_up(&vhost->work_wait_q);
2957}
2958
2959/**
2960 * ibmvfc_tgt_send_prli - Send a process login
2961 * @tgt: ibmvfc target struct
2962 *
2963 **/
2964static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
2965{
2966 struct ibmvfc_process_login *prli;
2967 struct ibmvfc_host *vhost = tgt->vhost;
2968 struct ibmvfc_event *evt;
2969
2970 if (vhost->discovery_threads >= disc_threads)
2971 return;
2972
2973 kref_get(&tgt->kref);
2974 evt = ibmvfc_get_event(vhost);
2975 vhost->discovery_threads++;
2976 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
2977 evt->tgt = tgt;
2978 prli = &evt->iu.prli;
2979 memset(prli, 0, sizeof(*prli));
2980 prli->common.version = 1;
2981 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
2982 prli->common.length = sizeof(*prli);
2983 prli->scsi_id = tgt->scsi_id;
2984
2985 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
2986 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
2987 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
2988
2989 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
2990 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
2991 vhost->discovery_threads--;
2992 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
2993 kref_put(&tgt->kref, ibmvfc_release_tgt);
2994 } else
2995 tgt_dbg(tgt, "Sent process login\n");
2996}
2997
2998/**
2999 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3000 * @evt: ibmvfc event struct
3001 *
3002 **/
3003static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3004{
3005 struct ibmvfc_target *tgt = evt->tgt;
3006 struct ibmvfc_host *vhost = evt->vhost;
3007 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3008 u32 status = rsp->common.status;
7d0e4622 3009 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3010
3011 vhost->discovery_threads--;
3012 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3013 switch (status) {
3014 case IBMVFC_MAD_SUCCESS:
3015 tgt_dbg(tgt, "Port Login succeeded\n");
3016 if (tgt->ids.port_name &&
3017 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3018 vhost->reinit = 1;
3019 tgt_dbg(tgt, "Port re-init required\n");
3020 break;
3021 }
3022 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3023 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3024 tgt->ids.port_id = tgt->scsi_id;
072b91f9
BK		 3025 memcpy(&tgt->service_parms, &rsp->service_parms,
3026 sizeof(tgt->service_parms));
3027 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3028 sizeof(tgt->service_parms_change));
3029 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3030 break;
3031 case IBMVFC_MAD_DRIVER_FAILED:
3032 break;
3033 case IBMVFC_MAD_CRQ_ERROR:
3034 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3035 break;
3036 case IBMVFC_MAD_FAILED:
3037 default:
072b91f9 3038 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 3039 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499
BK		 3040 else
3041 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3042
3043 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3044 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3045 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3046 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
072b91f9
BK		 3047 break;
3048 };
3049
3050 kref_put(&tgt->kref, ibmvfc_release_tgt);
3051 ibmvfc_free_event(evt);
3052 wake_up(&vhost->work_wait_q);
3053}
3054
3055/**
3056 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3057 * @tgt: ibmvfc target struct
3058 *
3059 **/
3060static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3061{
3062 struct ibmvfc_port_login *plogi;
3063 struct ibmvfc_host *vhost = tgt->vhost;
3064 struct ibmvfc_event *evt;
3065
3066 if (vhost->discovery_threads >= disc_threads)
3067 return;
3068
3069 kref_get(&tgt->kref);
017b2ae3 3070 tgt->logo_rcvd = 0;
072b91f9
BK		 3071 evt = ibmvfc_get_event(vhost);
3072 vhost->discovery_threads++;
3073 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3074 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3075 evt->tgt = tgt;
3076 plogi = &evt->iu.plogi;
3077 memset(plogi, 0, sizeof(*plogi));
3078 plogi->common.version = 1;
3079 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3080 plogi->common.length = sizeof(*plogi);
3081 plogi->scsi_id = tgt->scsi_id;
3082
3083 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3084 vhost->discovery_threads--;
3085 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3086 kref_put(&tgt->kref, ibmvfc_release_tgt);
3087 } else
3088 tgt_dbg(tgt, "Sent port login\n");
3089}
3090
3091/**
3092 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3093 * @evt: ibmvfc event struct
3094 *
3095 **/
3096static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3097{
3098 struct ibmvfc_target *tgt = evt->tgt;
3099 struct ibmvfc_host *vhost = evt->vhost;
3100 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3101 u32 status = rsp->common.status;
3102
3103 vhost->discovery_threads--;
3104 ibmvfc_free_event(evt);
3105 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3106
3107 switch (status) {
3108 case IBMVFC_MAD_SUCCESS:
3109 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3110 break;
3111 case IBMVFC_MAD_DRIVER_FAILED:
3112 kref_put(&tgt->kref, ibmvfc_release_tgt);
3113 wake_up(&vhost->work_wait_q);
3114 return;
3115 case IBMVFC_MAD_FAILED:
3116 default:
3117 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3118 break;
3119 };
3120
3121 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3122 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3123 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3124 tgt->scsi_id != tgt->new_scsi_id)
3125 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3126 kref_put(&tgt->kref, ibmvfc_release_tgt);
3127 wake_up(&vhost->work_wait_q);
3128}
3129
3130/**
3131 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3132 * @tgt: ibmvfc target struct
3133 *
3134 **/
3135static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3136{
3137 struct ibmvfc_implicit_logout *mad;
3138 struct ibmvfc_host *vhost = tgt->vhost;
3139 struct ibmvfc_event *evt;
3140
3141 if (vhost->discovery_threads >= disc_threads)
3142 return;
3143
3144 kref_get(&tgt->kref);
3145 evt = ibmvfc_get_event(vhost);
3146 vhost->discovery_threads++;
3147 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3148 evt->tgt = tgt;
3149 mad = &evt->iu.implicit_logout;
3150 memset(mad, 0, sizeof(*mad));
3151 mad->common.version = 1;
3152 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3153 mad->common.length = sizeof(*mad);
3154 mad->old_scsi_id = tgt->scsi_id;
3155
3156 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3157 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3158 vhost->discovery_threads--;
3159 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3160 kref_put(&tgt->kref, ibmvfc_release_tgt);
3161 } else
3162 tgt_dbg(tgt, "Sent Implicit Logout\n");
3163}
3164
989b8545
BK		 3165/**
3166 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3167 * @mad: ibmvfc passthru mad struct
3168 * @tgt: ibmvfc target struct
3169 *
3170 * Returns:
3171 * 1 if PLOGI needed / 0 if PLOGI not needed
3172 **/
3173static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3174 struct ibmvfc_target *tgt)
3175{
3176 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3177 sizeof(tgt->ids.port_name)))
3178 return 1;
3179 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3180 sizeof(tgt->ids.node_name)))
3181 return 1;
3182 if (mad->fc_iu.response[6] != tgt->scsi_id)
3183 return 1;
3184 return 0;
3185}
3186
3187/**
3188 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3189 * @evt: ibmvfc event struct
3190 *
3191 **/
3192static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3193{
3194 struct ibmvfc_target *tgt = evt->tgt;
3195 struct ibmvfc_host *vhost = evt->vhost;
3196 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3197 u32 status = mad->common.status;
3198 u8 fc_reason, fc_explain;
3199
3200 vhost->discovery_threads--;
3201 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
10501e1c 3202 del_timer(&tgt->timer);
989b8545
BK		 3203
3204 switch (status) {
3205 case IBMVFC_MAD_SUCCESS:
3206 tgt_dbg(tgt, "ADISC succeeded\n");
3207 if (ibmvfc_adisc_needs_plogi(mad, tgt))
5e47167b 3208 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3209 break;
3210 case IBMVFC_MAD_DRIVER_FAILED:
3211 break;
3212 case IBMVFC_MAD_FAILED:
3213 default:
5e47167b 3214 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3215 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3216 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3217 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3218 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3219 mad->iu.status, mad->iu.error,
3220 ibmvfc_get_fc_type(fc_reason), fc_reason,
3221 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3222 break;
3223 };
3224
3225 kref_put(&tgt->kref, ibmvfc_release_tgt);
3226 ibmvfc_free_event(evt);
3227 wake_up(&vhost->work_wait_q);
3228}
3229
3230/**
3231 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3232 * @evt: ibmvfc event struct
3233 *
3234 **/
3235static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3236{
3237 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3238
3239 memset(mad, 0, sizeof(*mad));
3240 mad->common.version = 1;
3241 mad->common.opcode = IBMVFC_PASSTHRU;
3242 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3243 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3244 offsetof(struct ibmvfc_passthru_mad, iu);
3245 mad->cmd_ioba.len = sizeof(mad->iu);
3246 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3247 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3248 mad->iu.cmd.va = (u64)evt->crq.ioba +
3249 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3250 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3251 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3252 mad->iu.rsp.va = (u64)evt->crq.ioba +
3253 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3254 offsetof(struct ibmvfc_passthru_fc_iu, response);
3255 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3256}
3257
10501e1c
BK		 3258/**
3259 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3260 * @evt: ibmvfc event struct
3261 *
3262 * Just cleanup this event struct. Everything else is handled by
3263 * the ADISC completion handler. If the ADISC never actually comes
3264 * back, we still have the timer running on the ADISC event struct
3265 * which will fire and cause the CRQ to get reset.
3266 *
3267 **/
3268static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3269{
3270 struct ibmvfc_host *vhost = evt->vhost;
3271 struct ibmvfc_target *tgt = evt->tgt;
3272
3273 tgt_dbg(tgt, "ADISC cancel complete\n");
3274 vhost->abort_threads--;
3275 ibmvfc_free_event(evt);
3276 kref_put(&tgt->kref, ibmvfc_release_tgt);
3277 wake_up(&vhost->work_wait_q);
3278}
3279
3280/**
3281 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3282 * @tgt: ibmvfc target struct
3283 *
3284 * If an ADISC times out, send a cancel. If the cancel times
3285 * out, reset the CRQ. When the ADISC comes back as cancelled,
3286 * log back into the target.
3287 **/
3288static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3289{
3290 struct ibmvfc_host *vhost = tgt->vhost;
3291 struct ibmvfc_event *evt;
3292 struct ibmvfc_tmf *tmf;
3293 unsigned long flags;
3294 int rc;
3295
3296 tgt_dbg(tgt, "ADISC timeout\n");
3297 spin_lock_irqsave(vhost->host->host_lock, flags);
3298 if (vhost->abort_threads >= disc_threads ||
3299 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3300 vhost->state != IBMVFC_INITIALIZING ||
3301 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3302 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3303 return;
3304 }
3305
3306 vhost->abort_threads++;
3307 kref_get(&tgt->kref);
3308 evt = ibmvfc_get_event(vhost);
3309 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3310
3311 evt->tgt = tgt;
3312 tmf = &evt->iu.tmf;
3313 memset(tmf, 0, sizeof(*tmf));
3314 tmf->common.version = 1;
3315 tmf->common.opcode = IBMVFC_TMF_MAD;
3316 tmf->common.length = sizeof(*tmf);
3317 tmf->scsi_id = tgt->scsi_id;
3318 tmf->cancel_key = tgt->cancel_key;
3319
3320 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3321
3322 if (rc) {
3323 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3324 vhost->abort_threads--;
3325 kref_put(&tgt->kref, ibmvfc_release_tgt);
3326 __ibmvfc_reset_host(vhost);
3327 } else
3328 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3329 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3330}
3331
989b8545
BK		 3332/**
3333 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3334 * @tgt: ibmvfc target struct
3335 *
10501e1c
BK		 3336 * When sending an ADISC we end up with two timers running. The
3337 * first timer is the timer in the ibmvfc target struct. If this
3338 * fires, we send a cancel to the target. The second timer is the
3339 * timer on the ibmvfc event for the ADISC, which is longer. If that
3340 * fires, it means the ADISC timed out and our attempt to cancel it
3341 * also failed, so we need to reset the CRQ.
989b8545
BK		 3342 **/
3343static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3344{
3345 struct ibmvfc_passthru_mad *mad;
3346 struct ibmvfc_host *vhost = tgt->vhost;
3347 struct ibmvfc_event *evt;
3348
3349 if (vhost->discovery_threads >= disc_threads)
3350 return;
3351
3352 kref_get(&tgt->kref);
3353 evt = ibmvfc_get_event(vhost);
3354 vhost->discovery_threads++;
3355 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3356 evt->tgt = tgt;
3357
3358 ibmvfc_init_passthru(evt);
3359 mad = &evt->iu.passthru;
3360 mad->iu.flags = IBMVFC_FC_ELS;
3361 mad->iu.scsi_id = tgt->scsi_id;
10501e1c 3362 mad->iu.cancel_key = tgt->cancel_key;
989b8545
BK		 3363
3364 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3365 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3366 sizeof(vhost->login_buf->resp.port_name));
3367 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3368 sizeof(vhost->login_buf->resp.node_name));
3369 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3370
10501e1c
BK		 3371 if (timer_pending(&tgt->timer))
3372 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3373 else {
3374 tgt->timer.data = (unsigned long) tgt;
3375 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3376 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3377 add_timer(&tgt->timer);
3378 }
3379
989b8545 3380 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
10501e1c 3381 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
989b8545 3382 vhost->discovery_threads--;
10501e1c 3383 del_timer(&tgt->timer);
989b8545
BK		 3384 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3385 kref_put(&tgt->kref, ibmvfc_release_tgt);
3386 } else
3387 tgt_dbg(tgt, "Sent ADISC\n");
3388}
3389
072b91f9
BK		 3390/**
3391 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3392 * @evt: ibmvfc event struct
3393 *
3394 **/
3395static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3396{
3397 struct ibmvfc_target *tgt = evt->tgt;
3398 struct ibmvfc_host *vhost = evt->vhost;
3399 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3400 u32 status = rsp->common.status;
7d0e4622 3401 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3402
3403 vhost->discovery_threads--;
3404 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3405 switch (status) {
3406 case IBMVFC_MAD_SUCCESS:
3407 tgt_dbg(tgt, "Query Target succeeded\n");
3408 tgt->new_scsi_id = rsp->scsi_id;
3409 if (rsp->scsi_id != tgt->scsi_id)
3410 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3411 else
3412 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3413 break;
3414 case IBMVFC_MAD_DRIVER_FAILED:
3415 break;
3416 case IBMVFC_MAD_CRQ_ERROR:
3417 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3418 break;
3419 case IBMVFC_MAD_FAILED:
3420 default:
072b91f9
BK		 3421 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3422 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3423 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3424 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3425 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 3426 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499
BK		 3427 else
3428 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3429
3430 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3431 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3432 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3433 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
072b91f9
BK		 3434 break;
3435 };
3436
3437 kref_put(&tgt->kref, ibmvfc_release_tgt);
3438 ibmvfc_free_event(evt);
3439 wake_up(&vhost->work_wait_q);
3440}
3441
3442/**
3443 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3444 * @tgt: ibmvfc target struct
3445 *
3446 **/
3447static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3448{
3449 struct ibmvfc_query_tgt *query_tgt;
3450 struct ibmvfc_host *vhost = tgt->vhost;
3451 struct ibmvfc_event *evt;
3452
3453 if (vhost->discovery_threads >= disc_threads)
3454 return;
3455
3456 kref_get(&tgt->kref);
3457 evt = ibmvfc_get_event(vhost);
3458 vhost->discovery_threads++;
3459 evt->tgt = tgt;
3460 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3461 query_tgt = &evt->iu.query_tgt;
3462 memset(query_tgt, 0, sizeof(*query_tgt));
3463 query_tgt->common.version = 1;
3464 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3465 query_tgt->common.length = sizeof(*query_tgt);
3466 query_tgt->wwpn = tgt->ids.port_name;
3467
3468 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3469 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3470 vhost->discovery_threads--;
3471 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3472 kref_put(&tgt->kref, ibmvfc_release_tgt);
3473 } else
3474 tgt_dbg(tgt, "Sent Query Target\n");
3475}
3476
3477/**
3478 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3479 * @vhost: ibmvfc host struct
3480 * @scsi_id: SCSI ID to allocate target for
3481 *
3482 * Returns:
3483 * 0 on success / other on failure
3484 **/
3485static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3486{
3487 struct ibmvfc_target *tgt;
3488 unsigned long flags;
3489
3490 spin_lock_irqsave(vhost->host->host_lock, flags);
3491 list_for_each_entry(tgt, &vhost->targets, queue) {
3492 if (tgt->scsi_id == scsi_id) {
3493 if (tgt->need_login)
3494 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3495 goto unlock_out;
3496 }
3497 }
3498 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3499
7270b9bd 3500 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
072b91f9 3501 if (!tgt) {
775a42ec 3502 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
072b91f9
BK		 3503 scsi_id);
3504 return -ENOMEM;
3505 }
3506
0883e3b3 3507 memset(tgt, 0, sizeof(*tgt));
072b91f9
BK		 3508 tgt->scsi_id = scsi_id;
3509 tgt->new_scsi_id = scsi_id;
3510 tgt->vhost = vhost;
3511 tgt->need_login = 1;
10501e1c
BK		 3512 tgt->cancel_key = vhost->task_set++;
3513 init_timer(&tgt->timer);
072b91f9
BK		 3514 kref_init(&tgt->kref);
3515 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3516 spin_lock_irqsave(vhost->host->host_lock, flags);
3517 list_add_tail(&tgt->queue, &vhost->targets);
3518
3519unlock_out:
3520 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3521 return 0;
3522}
3523
3524/**
3525 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3526 * @vhost: ibmvfc host struct
3527 *
3528 * Returns:
3529 * 0 on success / other on failure
3530 **/
3531static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3532{
3533 int i, rc;
3534
3535 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3536 rc = ibmvfc_alloc_target(vhost,
3537 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3538
3539 return rc;
3540}
3541
3542/**
3543 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3544 * @evt: ibmvfc event struct
3545 *
3546 **/
3547static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3548{
3549 struct ibmvfc_host *vhost = evt->vhost;
3550 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3551 u32 mad_status = rsp->common.status;
7d0e4622 3552 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3553
3554 switch (mad_status) {
3555 case IBMVFC_MAD_SUCCESS:
3556 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3557 vhost->num_targets = rsp->num_written;
3558 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3559 break;
3560 case IBMVFC_MAD_FAILED:
7d0e4622
BK		 3561 level += ibmvfc_retry_host_init(vhost);
3562 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3563 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
072b91f9
BK		 3564 break;
3565 case IBMVFC_MAD_DRIVER_FAILED:
3566 break;
3567 default:
3568 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3569 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3570 break;
3571 }
3572
3573 ibmvfc_free_event(evt);
3574 wake_up(&vhost->work_wait_q);
3575}
3576
3577/**
3578 * ibmvfc_discover_targets - Send Discover Targets MAD
3579 * @vhost: ibmvfc host struct
3580 *
3581 **/
3582static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3583{
3584 struct ibmvfc_discover_targets *mad;
3585 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3586
3587 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3588 mad = &evt->iu.discover_targets;
3589 memset(mad, 0, sizeof(*mad));
3590 mad->common.version = 1;
3591 mad->common.opcode = IBMVFC_DISC_TARGETS;
3592 mad->common.length = sizeof(*mad);
3593 mad->bufflen = vhost->disc_buf_sz;
3594 mad->buffer.va = vhost->disc_buf_dma;
3595 mad->buffer.len = vhost->disc_buf_sz;
3596 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3597
3598 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3599 ibmvfc_dbg(vhost, "Sent discover targets\n");
3600 else
3601 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3602}
3603
3604/**
3605 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3606 * @evt: ibmvfc event struct
3607 *
3608 **/
3609static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3610{
3611 struct ibmvfc_host *vhost = evt->vhost;
3612 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3613 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3614 unsigned int npiv_max_sectors;
7d0e4622 3615 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3616
3617 switch (mad_status) {
3618 case IBMVFC_MAD_SUCCESS:
3619 ibmvfc_free_event(evt);
3620 break;
3621 case IBMVFC_MAD_FAILED:
072b91f9 3622 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
7d0e4622 3623 level += ibmvfc_retry_host_init(vhost);
072b91f9
BK		 3624 else
3625 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
7d0e4622
BK		 3626 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
3627 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
072b91f9
BK		 3628 ibmvfc_free_event(evt);
3629 return;
3630 case IBMVFC_MAD_CRQ_ERROR:
3631 ibmvfc_retry_host_init(vhost);
3632 case IBMVFC_MAD_DRIVER_FAILED:
3633 ibmvfc_free_event(evt);
3634 return;
3635 default:
3636 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3637 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3638 ibmvfc_free_event(evt);
3639 return;
3640 }
3641
3642 vhost->client_migrated = 0;
3643
3644 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3645 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3646 rsp->flags);
3647 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3648 wake_up(&vhost->work_wait_q);
3649 return;
3650 }
3651
3652 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3653 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3654 rsp->max_cmds);
3655 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3656 wake_up(&vhost->work_wait_q);
3657 return;
3658 }
3659
79111d08 3660 vhost->logged_in = 1;
072b91f9
BK		 3661 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3662 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3663 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3664 rsp->drc_name, npiv_max_sectors);
3665
3666 fc_host_fabric_name(vhost->host) = rsp->node_name;
3667 fc_host_node_name(vhost->host) = rsp->node_name;
3668 fc_host_port_name(vhost->host) = rsp->port_name;
3669 fc_host_port_id(vhost->host) = rsp->scsi_id;
3670 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3671 fc_host_supported_classes(vhost->host) = 0;
3672 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3673 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3674 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3675 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3676 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3677 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3678 fc_host_maxframe_size(vhost->host) =
3679 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3680
3681 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3682 vhost->host->max_sectors = npiv_max_sectors;
3683 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3684 wake_up(&vhost->work_wait_q);
3685}
3686
3687/**
3688 * ibmvfc_npiv_login - Sends NPIV login
3689 * @vhost: ibmvfc host struct
3690 *
3691 **/
3692static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3693{
3694 struct ibmvfc_npiv_login_mad *mad;
3695 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3696
3697 ibmvfc_gather_partition_info(vhost);
3698 ibmvfc_set_login_info(vhost);
3699 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3700
3701 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3702 mad = &evt->iu.npiv_login;
3703 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3704 mad->common.version = 1;
3705 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3706 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3707 mad->buffer.va = vhost->login_buf_dma;
3708 mad->buffer.len = sizeof(*vhost->login_buf);
3709
072b91f9
BK		 3710 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3711
3712 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3713 ibmvfc_dbg(vhost, "Sent NPIV login\n");
3714 else
3715 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3716};
3717
79111d08
BK		 3718/**
3719 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
3720 * @vhost: ibmvfc host struct
3721 *
3722 **/
3723static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
3724{
3725 struct ibmvfc_host *vhost = evt->vhost;
3726 u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
3727
3728 ibmvfc_free_event(evt);
3729
3730 switch (mad_status) {
3731 case IBMVFC_MAD_SUCCESS:
3732 if (list_empty(&vhost->sent) &&
3733 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
3734 ibmvfc_init_host(vhost, 0);
3735 return;
3736 }
3737 break;
3738 case IBMVFC_MAD_FAILED:
3739 case IBMVFC_MAD_NOT_SUPPORTED:
3740 case IBMVFC_MAD_CRQ_ERROR:
3741 case IBMVFC_MAD_DRIVER_FAILED:
3742 default:
3743 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
3744 break;
3745 }
3746
3747 ibmvfc_hard_reset_host(vhost);
3748}
3749
3750/**
3751 * ibmvfc_npiv_logout - Issue an NPIV Logout
3752 * @vhost: ibmvfc host struct
3753 *
3754 **/
3755static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
3756{
3757 struct ibmvfc_npiv_logout_mad *mad;
3758 struct ibmvfc_event *evt;
3759
3760 evt = ibmvfc_get_event(vhost);
3761 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
3762
3763 mad = &evt->iu.npiv_logout;
3764 memset(mad, 0, sizeof(*mad));
3765 mad->common.version = 1;
3766 mad->common.opcode = IBMVFC_NPIV_LOGOUT;
3767 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
3768
3769 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
3770
3771 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3772 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
3773 else
3774 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3775}
3776
072b91f9
BK		 3777/**
3778 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
3779 * @vhost: ibmvfc host struct
3780 *
3781 * Returns:
3782 * 1 if work to do / 0 if not
3783 **/
3784static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
3785{
3786 struct ibmvfc_target *tgt;
3787
3788 list_for_each_entry(tgt, &vhost->targets, queue) {
3789 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
3790 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3791 return 1;
3792 }
3793
3794 return 0;
3795}
3796
3797/**
3798 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
3799 * @vhost: ibmvfc host struct
3800 *
3801 * Returns:
3802 * 1 if work to do / 0 if not
3803 **/
3804static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3805{
3806 struct ibmvfc_target *tgt;
3807
3808 if (kthread_should_stop())
3809 return 1;
3810 switch (vhost->action) {
3811 case IBMVFC_HOST_ACTION_NONE:
3812 case IBMVFC_HOST_ACTION_INIT_WAIT:
79111d08 3813 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 3814 return 0;
3815 case IBMVFC_HOST_ACTION_TGT_INIT:
3816 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3817 if (vhost->discovery_threads == disc_threads)
3818 return 0;
3819 list_for_each_entry(tgt, &vhost->targets, queue)
3820 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
3821 return 1;
3822 list_for_each_entry(tgt, &vhost->targets, queue)
3823 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
3824 return 0;
3825 return 1;
79111d08 3826 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 3827 case IBMVFC_HOST_ACTION_INIT:
3828 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
072b91f9 3829 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 3830 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 3831 case IBMVFC_HOST_ACTION_QUERY:
3832 default:
3833 break;
3834 };
3835
3836 return 1;
3837}
3838
3839/**
3840 * ibmvfc_work_to_do - Is there task level work to do?
3841 * @vhost: ibmvfc host struct
3842 *
3843 * Returns:
3844 * 1 if work to do / 0 if not
3845 **/
3846static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
3847{
3848 unsigned long flags;
3849 int rc;
3850
3851 spin_lock_irqsave(vhost->host->host_lock, flags);
3852 rc = __ibmvfc_work_to_do(vhost);
3853 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3854 return rc;
3855}
3856
3857/**
3858 * ibmvfc_log_ae - Log async events if necessary
3859 * @vhost: ibmvfc host struct
3860 * @events: events to log
3861 *
3862 **/
3863static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
3864{
3865 if (events & IBMVFC_AE_RSCN)
3866 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
3867 if ((events & IBMVFC_AE_LINKDOWN) &&
3868 vhost->state >= IBMVFC_HALTED)
3869 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
3870 if ((events & IBMVFC_AE_LINKUP) &&
3871 vhost->state == IBMVFC_INITIALIZING)
3872 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
3873}
3874
3875/**
3876 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
3877 * @tgt: ibmvfc target struct
3878 *
3879 **/
3880static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
3881{
3882 struct ibmvfc_host *vhost = tgt->vhost;
43c8da90 3883 struct fc_rport *rport;
072b91f9
BK		 3884 unsigned long flags;
3885
43c8da90
BK		 3886 tgt_dbg(tgt, "Adding rport\n");
3887 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
3888 spin_lock_irqsave(vhost->host->host_lock, flags);
3889
3890 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3891 tgt_dbg(tgt, "Deleting rport\n");
3892 list_del(&tgt->queue);
0883e3b3 3893 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 3894 fc_remote_port_delete(rport);
3895 del_timer_sync(&tgt->timer);
3896 kref_put(&tgt->kref, ibmvfc_release_tgt);
0883e3b3
BK		 3897 return;
3898 }
3899
072b91f9
BK		 3900 if (rport) {
3901 tgt_dbg(tgt, "rport add succeeded\n");
43c8da90 3902 tgt->rport = rport;
072b91f9
BK		 3903 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
3904 rport->supported_classes = 0;
52d7e861 3905 tgt->target_id = rport->scsi_target_id;
072b91f9
BK		 3906 if (tgt->service_parms.class1_parms[0] & 0x80000000)
3907 rport->supported_classes |= FC_COS_CLASS1;
3908 if (tgt->service_parms.class2_parms[0] & 0x80000000)
3909 rport->supported_classes |= FC_COS_CLASS2;
3910 if (tgt->service_parms.class3_parms[0] & 0x80000000)
3911 rport->supported_classes |= FC_COS_CLASS3;
3912 } else
3913 tgt_dbg(tgt, "rport add failed\n");
3914 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3915}
3916
3917/**
3918 * ibmvfc_do_work - Do task level work
3919 * @vhost: ibmvfc host struct
3920 *
3921 **/
3922static void ibmvfc_do_work(struct ibmvfc_host *vhost)
3923{
3924 struct ibmvfc_target *tgt;
3925 unsigned long flags;
3926 struct fc_rport *rport;
3927
3928 ibmvfc_log_ae(vhost, vhost->events_to_log);
3929 spin_lock_irqsave(vhost->host->host_lock, flags);
3930 vhost->events_to_log = 0;
3931 switch (vhost->action) {
3932 case IBMVFC_HOST_ACTION_NONE:
79111d08 3933 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 3934 case IBMVFC_HOST_ACTION_INIT_WAIT:
3935 break;
79111d08
BK		 3936 case IBMVFC_HOST_ACTION_LOGO:
3937 vhost->job_step(vhost);
3938 break;
072b91f9
BK		 3939 case IBMVFC_HOST_ACTION_INIT:
3940 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
1c41fa82
BK		 3941 if (vhost->delay_init) {
3942 vhost->delay_init = 0;
3943 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2131b33 3944 ssleep(15);
1c41fa82
BK		 3945 return;
3946 } else
3947 vhost->job_step(vhost);
072b91f9
BK		 3948 break;
3949 case IBMVFC_HOST_ACTION_QUERY:
3950 list_for_each_entry(tgt, &vhost->targets, queue)
3951 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
3952 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
3953 break;
3954 case IBMVFC_HOST_ACTION_QUERY_TGTS:
3955 list_for_each_entry(tgt, &vhost->targets, queue) {
3956 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
3957 tgt->job_step(tgt);
3958 break;
3959 }
3960 }
3961
3962 if (!ibmvfc_dev_init_to_do(vhost))
3963 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
3964 break;
3965 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 3966 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 3967 list_for_each_entry(tgt, &vhost->targets, queue) {
3968 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
3969 tgt_dbg(tgt, "Deleting rport\n");
3970 rport = tgt->rport;
3971 tgt->rport = NULL;
3972 list_del(&tgt->queue);
3973 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3974 if (rport)
3975 fc_remote_port_delete(rport);
10501e1c 3976 del_timer_sync(&tgt->timer);
072b91f9
BK		 3977 kref_put(&tgt->kref, ibmvfc_release_tgt);
3978 return;
3979 }
3980 }
3981
3982 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499 3983 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
43c8da90
BK		 3984 if (vhost->reinit) {
3985 vhost->reinit = 0;
3986 scsi_block_requests(vhost->host);
3987 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3988 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3989 } else {
3990 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
3991 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3992 wake_up(&vhost->init_wait_q);
3993 schedule_work(&vhost->rport_add_work_q);
3994 vhost->init_retries = 0;
3995 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3996 scsi_unblock_requests(vhost->host);
3997 }
3998
10e79499
BK		 3999 return;
4000 } else {
4001 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4002 vhost->job_step = ibmvfc_discover_targets;
4003 }
072b91f9
BK		 4004 } else {
4005 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4006 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4007 scsi_unblock_requests(vhost->host);
4008 wake_up(&vhost->init_wait_q);
4009 return;
4010 }
4011 break;
4012 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4013 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4014 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4015 ibmvfc_alloc_targets(vhost);
4016 spin_lock_irqsave(vhost->host->host_lock, flags);
4017 break;
4018 case IBMVFC_HOST_ACTION_TGT_INIT:
4019 list_for_each_entry(tgt, &vhost->targets, queue) {
4020 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4021 tgt->job_step(tgt);
4022 break;
4023 }
4024 }
4025
10e79499
BK		 4026 if (!ibmvfc_dev_init_to_do(vhost))
4027 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9 4028 break;
072b91f9
BK		 4029 default:
4030 break;
4031 };
4032
4033 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4034}
4035
4036/**
4037 * ibmvfc_work - Do task level work
4038 * @data: ibmvfc host struct
4039 *
4040 * Returns:
4041 * zero
4042 **/
4043static int ibmvfc_work(void *data)
4044{
4045 struct ibmvfc_host *vhost = data;
4046 int rc;
4047
4048 set_user_nice(current, -20);
4049
4050 while (1) {
4051 rc = wait_event_interruptible(vhost->work_wait_q,
4052 ibmvfc_work_to_do(vhost));
4053
4054 BUG_ON(rc);
4055
4056 if (kthread_should_stop())
4057 break;
4058
4059 ibmvfc_do_work(vhost);
4060 }
4061
4062 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4063 return 0;
4064}
4065
4066/**
4067 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4068 * @vhost: ibmvfc host struct
4069 *
4070 * Allocates a page for messages, maps it for dma, and registers
4071 * the crq with the hypervisor.
4072 *
4073 * Return value:
4074 * zero on success / other on failure
4075 **/
4076static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4077{
4078 int rc, retrc = -ENOMEM;
4079 struct device *dev = vhost->dev;
4080 struct vio_dev *vdev = to_vio_dev(dev);
4081 struct ibmvfc_crq_queue *crq = &vhost->crq;
4082
4083 ENTER;
4084 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4085
4086 if (!crq->msgs)
4087 return -ENOMEM;
4088
4089 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4090 crq->msg_token = dma_map_single(dev, crq->msgs,
4091 PAGE_SIZE, DMA_BIDIRECTIONAL);
4092
8d8bb39b 4093 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 4094 goto map_failed;
4095
4096 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4097 crq->msg_token, PAGE_SIZE);
4098
4099 if (rc == H_RESOURCE)
4100 /* maybe kexecing and resource is busy. try a reset */
4101 retrc = rc = ibmvfc_reset_crq(vhost);
4102
4103 if (rc == H_CLOSED)
4104 dev_warn(dev, "Partner adapter not ready\n");
4105 else if (rc) {
4106 dev_warn(dev, "Error %d opening adapter\n", rc);
4107 goto reg_crq_failed;
4108 }
4109
4110 retrc = 0;
4111
039a0898
BK		 4112 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4113
072b91f9
BK		 4114 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4115 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4116 goto req_irq_failed;
4117 }
4118
4119 if ((rc = vio_enable_interrupts(vdev))) {
4120 dev_err(dev, "Error %d enabling interrupts\n", rc);
4121 goto req_irq_failed;
4122 }
4123
4124 crq->cur = 0;
4125 LEAVE;
4126 return retrc;
4127
4128req_irq_failed:
039a0898 4129 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 4130 do {
4131 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4132 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4133reg_crq_failed:
4134 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4135map_failed:
4136 free_page((unsigned long)crq->msgs);
4137 return retrc;
4138}
4139
4140/**
4141 * ibmvfc_free_mem - Free memory for vhost
4142 * @vhost: ibmvfc host struct
4143 *
4144 * Return value:
4145 * none
4146 **/
4147static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4148{
4149 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4150
4151 ENTER;
4152 mempool_destroy(vhost->tgt_pool);
4153 kfree(vhost->trace);
4154 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4155 vhost->disc_buf_dma);
4156 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4157 vhost->login_buf, vhost->login_buf_dma);
4158 dma_pool_destroy(vhost->sg_pool);
4159 dma_unmap_single(vhost->dev, async_q->msg_token,
4160 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4161 free_page((unsigned long)async_q->msgs);
4162 LEAVE;
4163}
4164
4165/**
4166 * ibmvfc_alloc_mem - Allocate memory for vhost
4167 * @vhost: ibmvfc host struct
4168 *
4169 * Return value:
4170 * 0 on success / non-zero on failure
4171 **/
4172static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4173{
4174 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4175 struct device *dev = vhost->dev;
4176
4177 ENTER;
4178 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4179 if (!async_q->msgs) {
4180 dev_err(dev, "Couldn't allocate async queue.\n");
4181 goto nomem;
4182 }
4183
4184 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4185 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4186 async_q->size * sizeof(*async_q->msgs),
4187 DMA_BIDIRECTIONAL);
4188
8d8bb39b 4189 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 4190 dev_err(dev, "Failed to map async queue\n");
4191 goto free_async_crq;
4192 }
4193
4194 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4195 SG_ALL * sizeof(struct srp_direct_buf),
4196 sizeof(struct srp_direct_buf), 0);
4197
4198 if (!vhost->sg_pool) {
4199 dev_err(dev, "Failed to allocate sg pool\n");
4200 goto unmap_async_crq;
4201 }
4202
4203 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4204 &vhost->login_buf_dma, GFP_KERNEL);
4205
4206 if (!vhost->login_buf) {
4207 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4208 goto free_sg_pool;
4209 }
4210
4211 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4212 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4213 &vhost->disc_buf_dma, GFP_KERNEL);
4214
4215 if (!vhost->disc_buf) {
4216 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4217 goto free_login_buffer;
4218 }
4219
4220 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4221 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4222
4223 if (!vhost->trace)
4224 goto free_disc_buffer;
4225
d6886692 4226 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
072b91f9
BK		 4227 sizeof(struct ibmvfc_target));
4228
4229 if (!vhost->tgt_pool) {
4230 dev_err(dev, "Couldn't allocate target memory pool\n");
4231 goto free_trace;
4232 }
4233
4234 LEAVE;
4235 return 0;
4236
4237free_trace:
4238 kfree(vhost->trace);
4239free_disc_buffer:
4240 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4241 vhost->disc_buf_dma);
4242free_login_buffer:
4243 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4244 vhost->login_buf, vhost->login_buf_dma);
4245free_sg_pool:
4246 dma_pool_destroy(vhost->sg_pool);
4247unmap_async_crq:
4248 dma_unmap_single(dev, async_q->msg_token,
4249 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4250free_async_crq:
4251 free_page((unsigned long)async_q->msgs);
4252nomem:
4253 LEAVE;
4254 return -ENOMEM;
4255}
4256
43c8da90
BK		 4257/**
4258 * ibmvfc_rport_add_thread - Worker thread for rport adds
4259 * @work: work struct
4260 *
4261 **/
4262static void ibmvfc_rport_add_thread(struct work_struct *work)
4263{
4264 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4265 rport_add_work_q);
4266 struct ibmvfc_target *tgt;
4267 struct fc_rport *rport;
4268 unsigned long flags;
4269 int did_work;
4270
4271 ENTER;
4272 spin_lock_irqsave(vhost->host->host_lock, flags);
4273 do {
4274 did_work = 0;
4275 if (vhost->state != IBMVFC_ACTIVE)
4276 break;
4277
4278 list_for_each_entry(tgt, &vhost->targets, queue) {
4279 if (tgt->add_rport) {
4280 did_work = 1;
4281 tgt->add_rport = 0;
4282 kref_get(&tgt->kref);
4283 rport = tgt->rport;
4284 if (!rport) {
4285 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4286 ibmvfc_tgt_add_rport(tgt);
4287 } else if (get_device(&rport->dev)) {
4288 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4289 tgt_dbg(tgt, "Setting rport roles\n");
4290 fc_remote_port_rolechg(rport, tgt->ids.roles);
4291 put_device(&rport->dev);
4292 }
4293
4294 kref_put(&tgt->kref, ibmvfc_release_tgt);
4295 spin_lock_irqsave(vhost->host->host_lock, flags);
4296 break;
4297 }
4298 }
4299 } while(did_work);
4300
4301 if (vhost->state == IBMVFC_ACTIVE)
4302 vhost->scan_complete = 1;
4303 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4304 LEAVE;
4305}
4306
072b91f9
BK		 4307/**
4308 * ibmvfc_probe - Adapter hot plug add entry point
4309 * @vdev: vio device struct
4310 * @id: vio device id struct
4311 *
4312 * Return value:
4313 * 0 on success / non-zero on failure
4314 **/
4315static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4316{
4317 struct ibmvfc_host *vhost;
4318 struct Scsi_Host *shost;
4319 struct device *dev = &vdev->dev;
4320 int rc = -ENOMEM;
4321
4322 ENTER;
4323 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4324 if (!shost) {
4325 dev_err(dev, "Couldn't allocate host data\n");
4326 goto out;
4327 }
4328
4329 shost->transportt = ibmvfc_transport_template;
4330 shost->can_queue = max_requests;
4331 shost->max_lun = max_lun;
4332 shost->max_id = max_targets;
4333 shost->max_sectors = IBMVFC_MAX_SECTORS;
4334 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4335 shost->unique_id = shost->host_no;
4336
4337 vhost = shost_priv(shost);
4338 INIT_LIST_HEAD(&vhost->sent);
4339 INIT_LIST_HEAD(&vhost->free);
4340 INIT_LIST_HEAD(&vhost->targets);
4341 sprintf(vhost->name, IBMVFC_NAME);
4342 vhost->host = shost;
4343 vhost->dev = dev;
4344 vhost->partition_number = -1;
4345 vhost->log_level = log_level;
10501e1c 4346 vhost->task_set = 1;
072b91f9
BK		 4347 strcpy(vhost->partition_name, "UNKNOWN");
4348 init_waitqueue_head(&vhost->work_wait_q);
4349 init_waitqueue_head(&vhost->init_wait_q);
43c8da90 4350 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
072b91f9
BK		 4351
4352 if ((rc = ibmvfc_alloc_mem(vhost)))
4353 goto free_scsi_host;
4354
4355 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4356 shost->host_no);
4357
4358 if (IS_ERR(vhost->work_thread)) {
4359 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4360 PTR_ERR(vhost->work_thread));
4361 goto free_host_mem;
4362 }
4363
4364 if ((rc = ibmvfc_init_crq(vhost))) {
4365 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4366 goto kill_kthread;
4367 }
4368
4369 if ((rc = ibmvfc_init_event_pool(vhost))) {
4370 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4371 goto release_crq;
4372 }
4373
4374 if ((rc = scsi_add_host(shost, dev)))
4375 goto release_event_pool;
4376
4377 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4378 &ibmvfc_trace_attr))) {
4379 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4380 goto remove_shost;
4381 }
4382
4383 dev_set_drvdata(dev, vhost);
4384 spin_lock(&ibmvfc_driver_lock);
4385 list_add_tail(&vhost->queue, &ibmvfc_head);
4386 spin_unlock(&ibmvfc_driver_lock);
4387
4388 ibmvfc_send_crq_init(vhost);
4389 scsi_scan_host(shost);
4390 return 0;
4391
4392remove_shost:
4393 scsi_remove_host(shost);
4394release_event_pool:
4395 ibmvfc_free_event_pool(vhost);
4396release_crq:
4397 ibmvfc_release_crq_queue(vhost);
4398kill_kthread:
4399 kthread_stop(vhost->work_thread);
4400free_host_mem:
4401 ibmvfc_free_mem(vhost);
4402free_scsi_host:
4403 scsi_host_put(shost);
4404out:
4405 LEAVE;
4406 return rc;
4407}
4408
4409/**
4410 * ibmvfc_remove - Adapter hot plug remove entry point
4411 * @vdev: vio device struct
4412 *
4413 * Return value:
4414 * 0
4415 **/
4416static int ibmvfc_remove(struct vio_dev *vdev)
4417{
4418 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4419 unsigned long flags;
4420
4421 ENTER;
4422 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
70431105
BK		 4423
4424 spin_lock_irqsave(vhost->host->host_lock, flags);
2d0da2a4 4425 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
70431105
BK		 4426 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4427
2d0da2a4
BK		 4428 ibmvfc_wait_while_resetting(vhost);
4429 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 4430 kthread_stop(vhost->work_thread);
4431 fc_remove_host(vhost->host);
4432 scsi_remove_host(vhost->host);
072b91f9
BK		 4433
4434 spin_lock_irqsave(vhost->host->host_lock, flags);
4435 ibmvfc_purge_requests(vhost, DID_ERROR);
4436 ibmvfc_free_event_pool(vhost);
4437 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4438
4439 ibmvfc_free_mem(vhost);
4440 spin_lock(&ibmvfc_driver_lock);
4441 list_del(&vhost->queue);
4442 spin_unlock(&ibmvfc_driver_lock);
4443 scsi_host_put(vhost->host);
4444 LEAVE;
4445 return 0;
4446}
4447
39c1ffec
BK		 4448/**
4449 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4450 * @vdev: vio device struct
4451 *
4452 * Return value:
4453 * Number of bytes the driver will need to DMA map at the same time in
4454 * order to perform well.
4455 */
4456static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4457{
4458 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4459 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4460}
4461
072b91f9
BK		 4462static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4463 {"fcp", "IBM,vfc-client"},
4464 { "", "" }
4465};
4466MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4467
4468static struct vio_driver ibmvfc_driver = {
4469 .id_table = ibmvfc_device_table,
4470 .probe = ibmvfc_probe,
4471 .remove = ibmvfc_remove,
39c1ffec 4472 .get_desired_dma = ibmvfc_get_desired_dma,
072b91f9
BK		 4473 .driver = {
4474 .name = IBMVFC_NAME,
4475 .owner = THIS_MODULE,
4476 }
4477};
4478
4479static struct fc_function_template ibmvfc_transport_functions = {
4480 .show_host_fabric_name = 1,
4481 .show_host_node_name = 1,
4482 .show_host_port_name = 1,
4483 .show_host_supported_classes = 1,
4484 .show_host_port_type = 1,
4485 .show_host_port_id = 1,
9ab3610f 4486 .show_host_maxframe_size = 1,
072b91f9
BK		 4487
4488 .get_host_port_state = ibmvfc_get_host_port_state,
4489 .show_host_port_state = 1,
4490
4491 .get_host_speed = ibmvfc_get_host_speed,
4492 .show_host_speed = 1,
4493
4494 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4495 .terminate_rport_io = ibmvfc_terminate_rport_io,
4496
4497 .show_rport_maxframe_size = 1,
4498 .show_rport_supported_classes = 1,
4499
4500 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4501 .show_rport_dev_loss_tmo = 1,
4502
4503 .get_starget_node_name = ibmvfc_get_starget_node_name,
4504 .show_starget_node_name = 1,
4505
4506 .get_starget_port_name = ibmvfc_get_starget_port_name,
4507 .show_starget_port_name = 1,
4508
4509 .get_starget_port_id = ibmvfc_get_starget_port_id,
4510 .show_starget_port_id = 1,
4511};
4512
4513/**
4514 * ibmvfc_module_init - Initialize the ibmvfc module
4515 *
4516 * Return value:
4517 * 0 on success / other on failure
4518 **/
4519static int __init ibmvfc_module_init(void)
4520{
4521 int rc;
4522
4523 if (!firmware_has_feature(FW_FEATURE_VIO))
4524 return -ENODEV;
4525
4526 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4527 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4528
4529 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4530 if (!ibmvfc_transport_template)
4531 return -ENOMEM;
4532
4533 rc = vio_register_driver(&ibmvfc_driver);
4534 if (rc)
4535 fc_release_transport(ibmvfc_transport_template);
4536 return rc;
4537}
4538
4539/**
4540 * ibmvfc_module_exit - Teardown the ibmvfc module
4541 *
4542 * Return value:
4543 * nothing
4544 **/
4545static void __exit ibmvfc_module_exit(void)
4546{
4547 vio_unregister_driver(&ibmvfc_driver);
4548 fc_release_transport(ibmvfc_transport_template);
4549}
4550
4551module_init(ibmvfc_module_init);
4552module_exit(ibmvfc_module_exit);
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