blob: 60cd4ec51eae9090bd9b2279511a59fc73d43f4c [file] [log] [blame]
Brian King072b91f2008-07-01 13:14:30 -05001/*
2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
3 *
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
5 *
6 * Copyright (C) IBM Corporation, 2008
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/dma-mapping.h>
27#include <linux/dmapool.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/kthread.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090031#include <linux/slab.h>
Brian King072b91f2008-07-01 13:14:30 -050032#include <linux/of.h>
Brian Kingb0f4d4c2010-02-21 10:37:58 -060033#include <linux/pm.h>
Brian King072b91f2008-07-01 13:14:30 -050034#include <linux/stringify.h>
35#include <asm/firmware.h>
36#include <asm/irq.h>
37#include <asm/vio.h>
38#include <scsi/scsi.h>
39#include <scsi/scsi_cmnd.h>
40#include <scsi/scsi_host.h>
41#include <scsi/scsi_device.h>
42#include <scsi/scsi_tcq.h>
43#include <scsi/scsi_transport_fc.h>
Brian Kingd31429e2009-10-19 15:07:54 -050044#include <scsi/scsi_bsg_fc.h>
Brian King072b91f2008-07-01 13:14:30 -050045#include "ibmvfc.h"
46
47static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
48static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
49static unsigned int max_lun = IBMVFC_MAX_LUN;
50static unsigned int max_targets = IBMVFC_MAX_TARGETS;
51static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
52static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
53static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
54static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
55static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
56static LIST_HEAD(ibmvfc_head);
57static DEFINE_SPINLOCK(ibmvfc_driver_lock);
58static struct scsi_transport_template *ibmvfc_transport_template;
59
60MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
61MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
62MODULE_LICENSE("GPL");
63MODULE_VERSION(IBMVFC_DRIVER_VERSION);
64
65module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
66MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
68module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
69MODULE_PARM_DESC(default_timeout,
70 "Default timeout in seconds for initialization and EH commands. "
71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
72module_param_named(max_requests, max_requests, uint, S_IRUGO);
73MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
75module_param_named(max_lun, max_lun, uint, S_IRUGO);
76MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
77 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
78module_param_named(max_targets, max_targets, uint, S_IRUGO);
79MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
80 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
Brian King545ef9a2009-03-20 15:44:37 -050081module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
Brian King072b91f2008-07-01 13:14:30 -050082MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
84module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
85MODULE_PARM_DESC(debug, "Enable driver debug information. "
86 "[Default=" __stringify(IBMVFC_DEBUG) "]");
87module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
88MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
89 "transport should insulate the loss of a remote port. Once this "
90 "value is exceeded, the scsi target is removed. "
91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
92module_param_named(log_level, log_level, uint, 0);
93MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
95
96static const struct {
97 u16 status;
98 u16 error;
99 u8 result;
100 u8 retry;
101 int log;
102 char *name;
103} cmd_status [] = {
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
106 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
Brian King752b3232008-12-15 17:09:05 -0600107 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
Brian King072b91f2008-07-01 13:14:30 -0500108 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
Brian King497f9c52009-05-28 16:17:30 -0500116 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
Brian King072b91f2008-07-01 13:14:30 -0500117 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
118
119 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
120 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
Brian King752b3232008-12-15 17:09:05 -0600121 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
122 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
Brian King072b91f2008-07-01 13:14:30 -0500123 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
Brian King752b3232008-12-15 17:09:05 -0600124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
125 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
Brian King072b91f2008-07-01 13:14:30 -0500126 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
Brian King646d3852008-11-14 13:33:53 -0600127 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
Brian King072b91f2008-07-01 13:14:30 -0500128 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
129
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
133 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
134 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
135 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
136 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
138 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
139 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
140 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
141
142 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
143};
144
145static void ibmvfc_npiv_login(struct ibmvfc_host *);
146static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
147static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
148static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
Brian King79111d02009-05-28 16:17:29 -0500149static void ibmvfc_npiv_logout(struct ibmvfc_host *);
Brian King072b91f2008-07-01 13:14:30 -0500150
151static const char *unknown_error = "unknown error";
152
153#ifdef CONFIG_SCSI_IBMVFC_TRACE
154/**
155 * ibmvfc_trc_start - Log a start trace entry
156 * @evt: ibmvfc event struct
157 *
158 **/
159static void ibmvfc_trc_start(struct ibmvfc_event *evt)
160{
161 struct ibmvfc_host *vhost = evt->vhost;
162 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
163 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
164 struct ibmvfc_trace_entry *entry;
165
166 entry = &vhost->trace[vhost->trace_index++];
167 entry->evt = evt;
168 entry->time = jiffies;
169 entry->fmt = evt->crq.format;
170 entry->type = IBMVFC_TRC_START;
171
172 switch (entry->fmt) {
173 case IBMVFC_CMD_FORMAT:
174 entry->op_code = vfc_cmd->iu.cdb[0];
175 entry->scsi_id = vfc_cmd->tgt_scsi_id;
176 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
177 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
178 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len;
179 break;
180 case IBMVFC_MAD_FORMAT:
181 entry->op_code = mad->opcode;
182 break;
183 default:
184 break;
185 };
186}
187
188/**
189 * ibmvfc_trc_end - Log an end trace entry
190 * @evt: ibmvfc event struct
191 *
192 **/
193static void ibmvfc_trc_end(struct ibmvfc_event *evt)
194{
195 struct ibmvfc_host *vhost = evt->vhost;
196 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
197 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
198 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
199
200 entry->evt = evt;
201 entry->time = jiffies;
202 entry->fmt = evt->crq.format;
203 entry->type = IBMVFC_TRC_END;
204
205 switch (entry->fmt) {
206 case IBMVFC_CMD_FORMAT:
207 entry->op_code = vfc_cmd->iu.cdb[0];
208 entry->scsi_id = vfc_cmd->tgt_scsi_id;
209 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
210 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
211 entry->u.end.status = vfc_cmd->status;
212 entry->u.end.error = vfc_cmd->error;
213 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
214 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
215 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
216 break;
217 case IBMVFC_MAD_FORMAT:
218 entry->op_code = mad->opcode;
219 entry->u.end.status = mad->status;
220 break;
221 default:
222 break;
223
224 };
225}
226
227#else
228#define ibmvfc_trc_start(evt) do { } while (0)
229#define ibmvfc_trc_end(evt) do { } while (0)
230#endif
231
232/**
233 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
234 * @status: status / error class
235 * @error: error
236 *
237 * Return value:
238 * index into cmd_status / -EINVAL on failure
239 **/
240static int ibmvfc_get_err_index(u16 status, u16 error)
241{
242 int i;
243
244 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
245 if ((cmd_status[i].status & status) == cmd_status[i].status &&
246 cmd_status[i].error == error)
247 return i;
248
249 return -EINVAL;
250}
251
252/**
253 * ibmvfc_get_cmd_error - Find the error description for the fcp response
254 * @status: status / error class
255 * @error: error
256 *
257 * Return value:
258 * error description string
259 **/
260static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
261{
262 int rc = ibmvfc_get_err_index(status, error);
263 if (rc >= 0)
264 return cmd_status[rc].name;
265 return unknown_error;
266}
267
268/**
269 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
270 * @vfc_cmd: ibmvfc command struct
271 *
272 * Return value:
273 * SCSI result value to return for completed command
274 **/
275static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
276{
277 int err;
278 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
279 int fc_rsp_len = rsp->fcp_rsp_len;
280
281 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
Brian King4a2837d2009-05-28 16:17:22 -0500282 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
Brian King072b91f2008-07-01 13:14:30 -0500283 rsp->data.info.rsp_code))
284 return DID_ERROR << 16;
285
Brian King072b91f2008-07-01 13:14:30 -0500286 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error);
287 if (err >= 0)
288 return rsp->scsi_status | (cmd_status[err].result << 16);
289 return rsp->scsi_status | (DID_ERROR << 16);
290}
291
292/**
293 * ibmvfc_retry_cmd - Determine if error status is retryable
294 * @status: status / error class
295 * @error: error
296 *
297 * Return value:
298 * 1 if error should be retried / 0 if it should not
299 **/
300static int ibmvfc_retry_cmd(u16 status, u16 error)
301{
302 int rc = ibmvfc_get_err_index(status, error);
303
304 if (rc >= 0)
305 return cmd_status[rc].retry;
306 return 1;
307}
308
309static const char *unknown_fc_explain = "unknown fc explain";
310
311static const struct {
312 u16 fc_explain;
313 char *name;
314} ls_explain [] = {
315 { 0x00, "no additional explanation" },
316 { 0x01, "service parameter error - options" },
317 { 0x03, "service parameter error - initiator control" },
318 { 0x05, "service parameter error - recipient control" },
319 { 0x07, "service parameter error - received data field size" },
320 { 0x09, "service parameter error - concurrent seq" },
321 { 0x0B, "service parameter error - credit" },
322 { 0x0D, "invalid N_Port/F_Port_Name" },
323 { 0x0E, "invalid node/Fabric Name" },
324 { 0x0F, "invalid common service parameters" },
325 { 0x11, "invalid association header" },
326 { 0x13, "association header required" },
327 { 0x15, "invalid originator S_ID" },
328 { 0x17, "invalid OX_ID-RX-ID combination" },
329 { 0x19, "command (request) already in progress" },
330 { 0x1E, "N_Port Login requested" },
331 { 0x1F, "Invalid N_Port_ID" },
332};
333
334static const struct {
335 u16 fc_explain;
336 char *name;
337} gs_explain [] = {
338 { 0x00, "no additional explanation" },
339 { 0x01, "port identifier not registered" },
340 { 0x02, "port name not registered" },
341 { 0x03, "node name not registered" },
342 { 0x04, "class of service not registered" },
343 { 0x06, "initial process associator not registered" },
344 { 0x07, "FC-4 TYPEs not registered" },
345 { 0x08, "symbolic port name not registered" },
346 { 0x09, "symbolic node name not registered" },
347 { 0x0A, "port type not registered" },
348 { 0xF0, "authorization exception" },
349 { 0xF1, "authentication exception" },
350 { 0xF2, "data base full" },
351 { 0xF3, "data base empty" },
352 { 0xF4, "processing request" },
353 { 0xF5, "unable to verify connection" },
354 { 0xF6, "devices not in a common zone" },
355};
356
357/**
358 * ibmvfc_get_ls_explain - Return the FC Explain description text
359 * @status: FC Explain status
360 *
361 * Returns:
362 * error string
363 **/
364static const char *ibmvfc_get_ls_explain(u16 status)
365{
366 int i;
367
368 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
369 if (ls_explain[i].fc_explain == status)
370 return ls_explain[i].name;
371
372 return unknown_fc_explain;
373}
374
375/**
376 * ibmvfc_get_gs_explain - Return the FC Explain description text
377 * @status: FC Explain status
378 *
379 * Returns:
380 * error string
381 **/
382static const char *ibmvfc_get_gs_explain(u16 status)
383{
384 int i;
385
386 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
387 if (gs_explain[i].fc_explain == status)
388 return gs_explain[i].name;
389
390 return unknown_fc_explain;
391}
392
393static const struct {
394 enum ibmvfc_fc_type fc_type;
395 char *name;
396} fc_type [] = {
397 { IBMVFC_FABRIC_REJECT, "fabric reject" },
398 { IBMVFC_PORT_REJECT, "port reject" },
399 { IBMVFC_LS_REJECT, "ELS reject" },
400 { IBMVFC_FABRIC_BUSY, "fabric busy" },
401 { IBMVFC_PORT_BUSY, "port busy" },
402 { IBMVFC_BASIC_REJECT, "basic reject" },
403};
404
405static const char *unknown_fc_type = "unknown fc type";
406
407/**
408 * ibmvfc_get_fc_type - Return the FC Type description text
409 * @status: FC Type error status
410 *
411 * Returns:
412 * error string
413 **/
414static const char *ibmvfc_get_fc_type(u16 status)
415{
416 int i;
417
418 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
419 if (fc_type[i].fc_type == status)
420 return fc_type[i].name;
421
422 return unknown_fc_type;
423}
424
425/**
426 * ibmvfc_set_tgt_action - Set the next init action for the target
427 * @tgt: ibmvfc target struct
428 * @action: action to perform
429 *
430 **/
431static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
432 enum ibmvfc_target_action action)
433{
434 switch (tgt->action) {
435 case IBMVFC_TGT_ACTION_DEL_RPORT:
436 break;
437 default:
Brian King43c8da92009-05-28 16:17:28 -0500438 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
439 tgt->add_rport = 0;
Brian King072b91f2008-07-01 13:14:30 -0500440 tgt->action = action;
441 break;
442 }
443}
444
445/**
446 * ibmvfc_set_host_state - Set the state for the host
447 * @vhost: ibmvfc host struct
448 * @state: state to set host to
449 *
450 * Returns:
451 * 0 if state changed / non-zero if not changed
452 **/
453static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
454 enum ibmvfc_host_state state)
455{
456 int rc = 0;
457
458 switch (vhost->state) {
459 case IBMVFC_HOST_OFFLINE:
460 rc = -EINVAL;
461 break;
462 default:
463 vhost->state = state;
464 break;
465 };
466
467 return rc;
468}
469
470/**
471 * ibmvfc_set_host_action - Set the next init action for the host
472 * @vhost: ibmvfc host struct
473 * @action: action to perform
474 *
475 **/
476static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
477 enum ibmvfc_host_action action)
478{
479 switch (action) {
480 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
481 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
482 vhost->action = action;
483 break;
Brian King79111d02009-05-28 16:17:29 -0500484 case IBMVFC_HOST_ACTION_LOGO_WAIT:
485 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
486 vhost->action = action;
487 break;
Brian King072b91f2008-07-01 13:14:30 -0500488 case IBMVFC_HOST_ACTION_INIT_WAIT:
489 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
490 vhost->action = action;
491 break;
492 case IBMVFC_HOST_ACTION_QUERY:
493 switch (vhost->action) {
494 case IBMVFC_HOST_ACTION_INIT_WAIT:
495 case IBMVFC_HOST_ACTION_NONE:
Brian King43c8da92009-05-28 16:17:28 -0500496 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -0500497 vhost->action = action;
498 break;
499 default:
500 break;
501 };
502 break;
503 case IBMVFC_HOST_ACTION_TGT_INIT:
504 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
505 vhost->action = action;
506 break;
Brian King79111d02009-05-28 16:17:29 -0500507 case IBMVFC_HOST_ACTION_LOGO:
Brian King072b91f2008-07-01 13:14:30 -0500508 case IBMVFC_HOST_ACTION_INIT:
509 case IBMVFC_HOST_ACTION_TGT_DEL:
510 case IBMVFC_HOST_ACTION_QUERY_TGTS:
Brian King10e79492008-10-29 08:46:45 -0500511 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -0500512 case IBMVFC_HOST_ACTION_NONE:
513 default:
514 vhost->action = action;
515 break;
516 };
517}
518
519/**
520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
521 * @vhost: ibmvfc host struct
522 *
523 * Return value:
524 * nothing
525 **/
526static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
527{
528 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
Brian King2d0da2a2008-07-22 08:31:42 -0500529 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
530 scsi_block_requests(vhost->host);
531 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
532 }
Brian King072b91f2008-07-01 13:14:30 -0500533 } else
534 vhost->reinit = 1;
535
536 wake_up(&vhost->work_wait_q);
537}
538
539/**
540 * ibmvfc_link_down - Handle a link down event from the adapter
541 * @vhost: ibmvfc host struct
542 * @state: ibmvfc host state to enter
543 *
544 **/
545static void ibmvfc_link_down(struct ibmvfc_host *vhost,
546 enum ibmvfc_host_state state)
547{
548 struct ibmvfc_target *tgt;
549
550 ENTER;
551 scsi_block_requests(vhost->host);
552 list_for_each_entry(tgt, &vhost->targets, queue)
553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
554 ibmvfc_set_host_state(vhost, state);
555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
556 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
557 wake_up(&vhost->work_wait_q);
558 LEAVE;
559}
560
561/**
562 * ibmvfc_init_host - Start host initialization
563 * @vhost: ibmvfc host struct
564 *
565 * Return value:
566 * nothing
567 **/
Brian King861890c2009-10-19 15:07:49 -0500568static void ibmvfc_init_host(struct ibmvfc_host *vhost)
Brian King072b91f2008-07-01 13:14:30 -0500569{
570 struct ibmvfc_target *tgt;
571
572 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
Brian King1c41fa822008-12-03 11:02:54 -0600573 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
Brian King072b91f2008-07-01 13:14:30 -0500574 dev_err(vhost->dev,
575 "Host initialization retries exceeded. Taking adapter offline\n");
576 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
577 return;
578 }
579 }
580
581 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
Brian King861890c2009-10-19 15:07:49 -0500582 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
583 vhost->async_crq.cur = 0;
Brian Kingcf6f10d2008-08-15 10:59:23 -0500584
Brian King072b91f2008-07-01 13:14:30 -0500585 list_for_each_entry(tgt, &vhost->targets, queue)
Brian King5e471672009-05-28 16:17:32 -0500586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King072b91f2008-07-01 13:14:30 -0500587 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);
Brian King039a0892009-03-20 15:44:35 -0500650 tasklet_kill(&vhost->tasklet);
Brian King072b91f2008-07-01 13:14:30 -0500651 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;
Brian King79111d02009-05-28 16:17:29 -0500656 vhost->logged_in = 0;
Brian King072b91f2008-07-01 13:14:30 -0500657 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;
Brian King79111d02009-05-28 16:17:29 -0500703 vhost->logged_in = 0;
Brian King072b91f2008-07-01 13:14:30 -0500704 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
Brian Kingad8dcff2008-10-29 08:46:41 -0500773 if (evt->eh_comp)
774 complete(evt->eh_comp);
775
Brian King072b91f2008-07-01 13:14:30 -0500776 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/**
Brian King79111d02009-05-28 16:17:29 -0500819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
Brian King072b91f2008-07-01 13:14:30 -0500820 * @vhost: struct ibmvfc host to reset
821 **/
Brian King79111d02009-05-28 16:17:29 -0500822static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
Brian King072b91f2008-07-01 13:14:30 -0500823{
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/**
Brian King79111d02009-05-28 16:17:29 -0500838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
Brian King072b91f2008-07-01 13:14:30 -0500839 * @vhost: struct ibmvfc host to reset
840 **/
Brian King79111d02009-05-28 16:17:29 -0500841static 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 **/
Brian King072b91f2008-07-01 13:14:30 -0500857static 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 *
Brian King7d0e4622009-05-28 16:17:26 -0500870 * Returns: 1 if init will be retried / 0 if not
871 *
Brian King072b91f2008-07-01 13:14:30 -0500872 **/
Brian King7d0e4622009-05-28 16:17:26 -0500873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
Brian King072b91f2008-07-01 13:14:30 -0500874{
Brian King7d0e4622009-05-28 16:17:26 -0500875 int retry = 0;
876
Brian King072b91f2008-07-01 13:14:30 -0500877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
Brian King1c41fa822008-12-03 11:02:54 -0600878 vhost->delay_init = 1;
879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
Brian King072b91f2008-07-01 13:14:30 -0500880 dev_err(vhost->dev,
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
Brian King1c41fa822008-12-03 11:02:54 -0600883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
Brian King072b91f2008-07-01 13:14:30 -0500884 __ibmvfc_reset_host(vhost);
Brian King7d0e4622009-05-28 16:17:26 -0500885 else {
Brian King072b91f2008-07-01 13:14:30 -0500886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
Brian King7d0e4622009-05-28 16:17:26 -0500887 retry = 1;
888 }
Brian King072b91f2008-07-01 13:14:30 -0500889 }
890
891 wake_up(&vhost->work_wait_q);
Brian King7d0e4622009-05-28 16:17:26 -0500892 return retry;
Brian King072b91f2008-07-01 13:14:30 -0500893}
894
895/**
Brian Kingb3c10489c2008-07-22 08:31:41 -0500896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
Brian King072b91f2008-07-01 13:14:30 -0500897 * @starget: scsi target struct
898 *
899 * Return value:
900 * ibmvfc_target struct / NULL if not found
901 **/
Brian Kingb3c10489c2008-07-22 08:31:41 -0500902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
Brian King072b91f2008-07-01 13:14:30 -0500903{
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)
Brian Kingb3c10489c2008-07-22 08:31:41 -0500909 if (tgt->target_id == starget->id) {
910 kref_get(&tgt->kref);
Brian King072b91f2008-07-01 13:14:30 -0500911 return tgt;
Brian Kingb3c10489c2008-07-22 08:31:41 -0500912 }
Brian King072b91f2008-07-01 13:14:30 -0500913 return NULL;
914}
915
916/**
Brian Kingb3c10489c2008-07-22 08:31:41 -0500917 * ibmvfc_get_target - Find the specified scsi_target
Brian King072b91f2008-07-01 13:14:30 -0500918 * @starget: scsi target struct
919 *
920 * Return value:
921 * ibmvfc_target struct / NULL if not found
922 **/
Brian Kingb3c10489c2008-07-22 08:31:41 -0500923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
Brian King072b91f2008-07-01 13:14:30 -0500924{
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);
Brian Kingb3c10489c2008-07-22 08:31:41 -0500930 tgt = __ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -0500931 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:
Stephen Rothwell775a42e2009-01-06 14:59:00 +0000969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
Brian King072b91f2008-07-01 13:14:30 -0500970 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;
Brian King0ae808e2008-07-22 08:31:39 -05001007 case IBMVFC_NO_CRQ:
1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1009 break;
Brian King072b91f2008-07-01 13:14:30 -05001010 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
1034/**
Brian Kingb3c10489c2008-07-22 08:31:41 -05001035 * 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
1045/**
Brian King072b91f2008-07-01 13:14:30 -05001046 * 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{
Brian Kingb3c10489c2008-07-22 08:31:41 -05001054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -05001055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
Brian Kingb3c10489c2008-07-22 08:31:41 -05001056 if (tgt)
1057 kref_put(&tgt->kref, ibmvfc_release_tgt);
Brian King072b91f2008-07-01 13:14:30 -05001058}
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{
Brian Kingb3c10489c2008-07-22 08:31:41 -05001069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -05001070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
Brian Kingb3c10489c2008-07-22 08:31:41 -05001071 if (tgt)
1072 kref_put(&tgt->kref, ibmvfc_release_tgt);
Brian King072b91f2008-07-01 13:14:30 -05001073}
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{
Brian Kingb3c10489c2008-07-22 08:31:41 -05001084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
Brian King072b91f2008-07-01 13:14:30 -05001085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
Brian Kingb3c10489c2008-07-22 08:31:41 -05001086 if (tgt)
1087 kref_put(&tgt->kref, ibmvfc_release_tgt);
Brian King072b91f2008-07-01 13:14:30 -05001088}
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,
Brian King3eddc562008-08-15 10:59:21 -05001100 ((vhost->state == IBMVFC_ACTIVE ||
1101 vhost->state == IBMVFC_HOST_OFFLINE ||
1102 vhost->state == IBMVFC_LINK_DEAD) &&
1103 vhost->action == IBMVFC_HOST_ACTION_NONE),
Brian King072b91f2008-07-01 13:14:30 -05001104 (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;
Grant Likely61c7a082010-04-13 16:12:29 -07001160 struct device_node *of_node = vhost->dev->of_node;
Brian King072b91f2008-07-01 13:14:30 -05001161 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;
Brian King497f9c52009-05-28 16:17:30 -05001172 login_info->flags = IBMVFC_FLUSH_ON_HALT;
Brian King072b91f2008-07-01 13:14:30 -05001173 if (vhost->client_migrated)
Brian King497f9c52009-05-28 16:17:30 -05001174 login_info->flags |= IBMVFC_CLIENT_MIGRATED;
Brian King072b91f2008-07-01 13:14:30 -05001175
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;
Brian King52d7e862008-07-22 08:31:46 -05001179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs);
Brian King072b91f2008-07-01 13:14:30 -05001180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1181 strncpy(login_info->device_name,
Kay Sievers71610f52008-12-03 22:41:36 +01001182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
Brian King072b91f2008-07-01 13:14:30 -05001183
1184 location = of_get_property(of_node, "ibm,loc-code", NULL);
Kay Sievers71610f52008-12-03 22:41:36 +01001185 location = location ? location : dev_name(vhost->dev);
Brian King072b91f2008-07-01 13:14:30 -05001186 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;
Brian Kingad8dcff2008-10-29 08:46:41 -05001288 evt->eh_comp = NULL;
Brian King072b91f2008-07-01 13:14:30 -05001289}
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) {
Brian King64b840d2009-01-22 15:45:38 -06001359 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");
Brian King072b91f2008-07-01 13:14:30 -05001362 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
Brian Kinga528ab72008-12-03 11:02:56 -06001420 mb();
1421
Brian King072b91f2008-07-01 13:14:30 -05001422 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
Brian King0ae808e2008-07-22 08:31:39 -05001475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
Brian King072b91f2008-07-01 13:14:30 -05001476 return;
1477
1478 if (rsp->flags & FCP_RSP_LEN_VALID)
1479 rsp_code = rsp->data.info.rsp_code;
1480
1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) "
1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1485}
1486
1487/**
Brian King6d29cc52009-05-28 16:17:33 -05001488 * 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
1508/**
Brian King072b91f2008-07-01 13:14:30 -05001509 * 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;
Brian King2bac4062008-08-15 10:59:26 -05001519 u32 rsp_len = 0;
1520 u32 sense_len = rsp->fcp_sense_len;
Brian King072b91f2008-07-01 13:14:30 -05001521
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;
Brian King2bac4062008-08-15 10:59:26 -05001537 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
Brian King072b91f2008-07-01 13:14:30 -05001538 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
Brian King646d3852008-11-14 13:33:53 -06001539 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
Brian King6d29cc52009-05-28 16:17:33 -05001540 ibmvfc_relogin(cmnd->device);
Brian King072b91f2008-07-01 13:14:30 -05001541
Brian King50119da2008-10-29 08:46:36 -05001542 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1543 cmnd->result = (DID_ERROR << 16);
1544
Brian King072b91f2008-07-01 13:14:30 -05001545 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
Brian Kingad8dcff2008-10-29 08:46:41 -05001556 if (evt->eh_comp)
1557 complete(evt->eh_comp);
1558
Brian King072b91f2008-07-01 13:14:30 -05001559 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;
Brian King072b91f2008-07-01 13:14:30 -05001631 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/**
Brian Kingd31429e2009-10-19 15:07:54 -05001681 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1682 * @evt: struct ibmvfc_event
1683 *
1684 **/
1685static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1686{
1687 struct ibmvfc_host *vhost = evt->vhost;
1688
1689 ibmvfc_free_event(evt);
1690 vhost->aborting_passthru = 0;
1691 dev_info(vhost->dev, "Passthru command cancelled\n");
1692}
1693
1694/**
1695 * ibmvfc_bsg_timeout - Handle a BSG timeout
1696 * @job: struct fc_bsg_job that timed out
1697 *
1698 * Returns:
1699 * 0 on success / other on failure
1700 **/
1701static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
1702{
1703 struct ibmvfc_host *vhost = shost_priv(job->shost);
1704 unsigned long port_id = (unsigned long)job->dd_data;
1705 struct ibmvfc_event *evt;
1706 struct ibmvfc_tmf *tmf;
1707 unsigned long flags;
1708 int rc;
1709
1710 ENTER;
1711 spin_lock_irqsave(vhost->host->host_lock, flags);
1712 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1713 __ibmvfc_reset_host(vhost);
1714 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1715 return 0;
1716 }
1717
1718 vhost->aborting_passthru = 1;
1719 evt = ibmvfc_get_event(vhost);
1720 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1721
1722 tmf = &evt->iu.tmf;
1723 memset(tmf, 0, sizeof(*tmf));
1724 tmf->common.version = 1;
1725 tmf->common.opcode = IBMVFC_TMF_MAD;
1726 tmf->common.length = sizeof(*tmf);
1727 tmf->scsi_id = port_id;
1728 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
1729 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY;
1730 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1731
1732 if (rc != 0) {
1733 vhost->aborting_passthru = 0;
1734 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1735 rc = -EIO;
1736 } else
1737 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1738 port_id);
1739
1740 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1741
1742 LEAVE;
1743 return rc;
1744}
1745
1746/**
1747 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1748 * @vhost: struct ibmvfc_host to send command
1749 * @port_id: port ID to send command
1750 *
1751 * Returns:
1752 * 0 on success / other on failure
1753 **/
1754static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1755{
1756 struct ibmvfc_port_login *plogi;
1757 struct ibmvfc_target *tgt;
1758 struct ibmvfc_event *evt;
1759 union ibmvfc_iu rsp_iu;
1760 unsigned long flags;
1761 int rc = 0, issue_login = 1;
1762
1763 ENTER;
1764 spin_lock_irqsave(vhost->host->host_lock, flags);
1765 list_for_each_entry(tgt, &vhost->targets, queue) {
1766 if (tgt->scsi_id == port_id) {
1767 issue_login = 0;
1768 break;
1769 }
1770 }
1771
1772 if (!issue_login)
1773 goto unlock_out;
1774 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1775 goto unlock_out;
1776
1777 evt = ibmvfc_get_event(vhost);
1778 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1779 plogi = &evt->iu.plogi;
1780 memset(plogi, 0, sizeof(*plogi));
1781 plogi->common.version = 1;
1782 plogi->common.opcode = IBMVFC_PORT_LOGIN;
1783 plogi->common.length = sizeof(*plogi);
1784 plogi->scsi_id = port_id;
1785 evt->sync_iu = &rsp_iu;
1786 init_completion(&evt->comp);
1787
1788 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1789 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1790
1791 if (rc)
1792 return -EIO;
1793
1794 wait_for_completion(&evt->comp);
1795
1796 if (rsp_iu.plogi.common.status)
1797 rc = -EIO;
1798
1799 spin_lock_irqsave(vhost->host->host_lock, flags);
1800 ibmvfc_free_event(evt);
1801unlock_out:
1802 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1803 LEAVE;
1804 return rc;
1805}
1806
1807/**
1808 * ibmvfc_bsg_request - Handle a BSG request
1809 * @job: struct fc_bsg_job to be executed
1810 *
1811 * Returns:
1812 * 0 on success / other on failure
1813 **/
1814static int ibmvfc_bsg_request(struct fc_bsg_job *job)
1815{
1816 struct ibmvfc_host *vhost = shost_priv(job->shost);
1817 struct fc_rport *rport = job->rport;
1818 struct ibmvfc_passthru_mad *mad;
1819 struct ibmvfc_event *evt;
1820 union ibmvfc_iu rsp_iu;
1821 unsigned long flags, port_id = -1;
1822 unsigned int code = job->request->msgcode;
1823 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1824 u32 fc_flags, rsp_len;
1825
1826 ENTER;
1827 job->reply->reply_payload_rcv_len = 0;
1828 if (rport)
1829 port_id = rport->port_id;
1830
1831 switch (code) {
1832 case FC_BSG_HST_ELS_NOLOGIN:
1833 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
1834 (job->request->rqst_data.h_els.port_id[1] << 8) |
1835 job->request->rqst_data.h_els.port_id[2];
1836 case FC_BSG_RPT_ELS:
1837 fc_flags = IBMVFC_FC_ELS;
1838 break;
1839 case FC_BSG_HST_CT:
1840 issue_login = 1;
1841 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
1842 (job->request->rqst_data.h_ct.port_id[1] << 8) |
1843 job->request->rqst_data.h_ct.port_id[2];
1844 case FC_BSG_RPT_CT:
1845 fc_flags = IBMVFC_FC_CT_IU;
1846 break;
1847 default:
1848 return -ENOTSUPP;
1849 };
1850
1851 if (port_id == -1)
1852 return -EINVAL;
1853 if (!mutex_trylock(&vhost->passthru_mutex))
1854 return -EBUSY;
1855
1856 job->dd_data = (void *)port_id;
1857 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1858 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1859
1860 if (!req_seg) {
1861 mutex_unlock(&vhost->passthru_mutex);
1862 return -ENOMEM;
1863 }
1864
1865 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1866 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1867
1868 if (!rsp_seg) {
1869 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1870 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1871 mutex_unlock(&vhost->passthru_mutex);
1872 return -ENOMEM;
1873 }
1874
1875 if (req_seg > 1 || rsp_seg > 1) {
1876 rc = -EINVAL;
1877 goto out;
1878 }
1879
1880 if (issue_login)
1881 rc = ibmvfc_bsg_plogi(vhost, port_id);
1882
1883 spin_lock_irqsave(vhost->host->host_lock, flags);
1884
1885 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1886 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1887 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1888 goto out;
1889 }
1890
1891 evt = ibmvfc_get_event(vhost);
1892 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1893 mad = &evt->iu.passthru;
1894
1895 memset(mad, 0, sizeof(*mad));
1896 mad->common.version = 1;
1897 mad->common.opcode = IBMVFC_PASSTHRU;
1898 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
1899
1900 mad->cmd_ioba.va = (u64)evt->crq.ioba +
1901 offsetof(struct ibmvfc_passthru_mad, iu);
1902 mad->cmd_ioba.len = sizeof(mad->iu);
1903
1904 mad->iu.cmd_len = job->request_payload.payload_len;
1905 mad->iu.rsp_len = job->reply_payload.payload_len;
1906 mad->iu.flags = fc_flags;
1907 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
1908
1909 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list);
1910 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list);
1911 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list);
1912 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list);
1913 mad->iu.scsi_id = port_id;
1914 mad->iu.tag = (u64)evt;
1915 rsp_len = mad->iu.rsp.len;
1916
1917 evt->sync_iu = &rsp_iu;
1918 init_completion(&evt->comp);
1919 rc = ibmvfc_send_event(evt, vhost, 0);
1920 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1921
1922 if (rc) {
1923 rc = -EIO;
1924 goto out;
1925 }
1926
1927 wait_for_completion(&evt->comp);
1928
1929 if (rsp_iu.passthru.common.status)
1930 rc = -EIO;
1931 else
1932 job->reply->reply_payload_rcv_len = rsp_len;
1933
1934 spin_lock_irqsave(vhost->host->host_lock, flags);
1935 ibmvfc_free_event(evt);
1936 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1937 job->reply->result = rc;
1938 job->job_done(job);
1939 rc = 0;
1940out:
1941 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1942 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1943 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1944 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1945 mutex_unlock(&vhost->passthru_mutex);
1946 LEAVE;
1947 return rc;
1948}
1949
1950/**
Brian King072b91f2008-07-01 13:14:30 -05001951 * ibmvfc_reset_device - Reset the device with the specified reset type
1952 * @sdev: scsi device to reset
1953 * @type: reset type
1954 * @desc: reset type description for log messages
1955 *
1956 * Returns:
1957 * 0 on success / other on failure
1958 **/
1959static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1960{
1961 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1962 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1963 struct ibmvfc_cmd *tmf;
Brian King50ed9a02008-10-29 08:46:47 -05001964 struct ibmvfc_event *evt = NULL;
Brian King072b91f2008-07-01 13:14:30 -05001965 union ibmvfc_iu rsp_iu;
1966 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1967 int rsp_rc = -EBUSY;
1968 unsigned long flags;
1969 int rsp_code = 0;
1970
1971 spin_lock_irqsave(vhost->host->host_lock, flags);
1972 if (vhost->state == IBMVFC_ACTIVE) {
1973 evt = ibmvfc_get_event(vhost);
1974 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1975
1976 tmf = &evt->iu.cmd;
1977 memset(tmf, 0, sizeof(*tmf));
1978 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
1979 tmf->resp.len = sizeof(tmf->rsp);
1980 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
1981 tmf->payload_len = sizeof(tmf->iu);
1982 tmf->resp_len = sizeof(tmf->rsp);
1983 tmf->cancel_key = (unsigned long)sdev->hostdata;
1984 tmf->tgt_scsi_id = rport->port_id;
1985 int_to_scsilun(sdev->lun, &tmf->iu.lun);
1986 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
1987 tmf->iu.tmf_flags = type;
1988 evt->sync_iu = &rsp_iu;
1989
1990 init_completion(&evt->comp);
1991 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1992 }
1993 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1994
1995 if (rsp_rc != 0) {
1996 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1997 desc, rsp_rc);
1998 return -EIO;
1999 }
2000
2001 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2002 wait_for_completion(&evt->comp);
2003
Brian King230934a2009-10-19 15:07:47 -05002004 if (rsp_iu.cmd.status)
2005 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2006
2007 if (rsp_code) {
Brian King072b91f2008-07-01 13:14:30 -05002008 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2009 rsp_code = fc_rsp->data.info.rsp_code;
2010
2011 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2012 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2013 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
2014 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2015 fc_rsp->scsi_status);
2016 rsp_rc = -EIO;
2017 } else
2018 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2019
2020 spin_lock_irqsave(vhost->host->host_lock, flags);
2021 ibmvfc_free_event(evt);
2022 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2023 return rsp_rc;
2024}
2025
2026/**
2027 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2028 * @sdev: scsi device to abort commands
2029 *
2030 * This sends an Abort Task Set to the VIOS for the specified device. This does
2031 * NOT send any cancel to the VIOS. That must be done separately.
2032 *
2033 * Returns:
2034 * 0 on success / other on failure
2035 **/
2036static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2037{
2038 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2039 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2040 struct ibmvfc_cmd *tmf;
2041 struct ibmvfc_event *evt, *found_evt;
2042 union ibmvfc_iu rsp_iu;
2043 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2044 int rsp_rc = -EBUSY;
2045 unsigned long flags;
2046 int rsp_code = 0;
2047
2048 spin_lock_irqsave(vhost->host->host_lock, flags);
2049 found_evt = NULL;
2050 list_for_each_entry(evt, &vhost->sent, queue) {
2051 if (evt->cmnd && evt->cmnd->device == sdev) {
2052 found_evt = evt;
2053 break;
2054 }
2055 }
2056
2057 if (!found_evt) {
2058 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2059 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2060 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2061 return 0;
2062 }
2063
2064 if (vhost->state == IBMVFC_ACTIVE) {
2065 evt = ibmvfc_get_event(vhost);
2066 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2067
2068 tmf = &evt->iu.cmd;
2069 memset(tmf, 0, sizeof(*tmf));
2070 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
2071 tmf->resp.len = sizeof(tmf->rsp);
2072 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
2073 tmf->payload_len = sizeof(tmf->iu);
2074 tmf->resp_len = sizeof(tmf->rsp);
2075 tmf->cancel_key = (unsigned long)sdev->hostdata;
2076 tmf->tgt_scsi_id = rport->port_id;
2077 int_to_scsilun(sdev->lun, &tmf->iu.lun);
2078 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
2079 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2080 evt->sync_iu = &rsp_iu;
2081
2082 init_completion(&evt->comp);
2083 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2084 }
2085
2086 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2087
2088 if (rsp_rc != 0) {
2089 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2090 return -EIO;
2091 }
2092
2093 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2094 wait_for_completion(&evt->comp);
2095
Brian King230934a2009-10-19 15:07:47 -05002096 if (rsp_iu.cmd.status)
2097 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2098
2099 if (rsp_code) {
Brian King072b91f2008-07-01 13:14:30 -05002100 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2101 rsp_code = fc_rsp->data.info.rsp_code;
2102
2103 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2104 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2105 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
2106 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2107 fc_rsp->scsi_status);
2108 rsp_rc = -EIO;
2109 } else
2110 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2111
2112 spin_lock_irqsave(vhost->host->host_lock, flags);
2113 ibmvfc_free_event(evt);
2114 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2115 return rsp_rc;
2116}
2117
2118/**
2119 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2120 * @sdev: scsi device to cancel commands
2121 * @type: type of error recovery being performed
2122 *
2123 * This sends a cancel to the VIOS for the specified device. This does
2124 * NOT send any abort to the actual device. That must be done separately.
2125 *
2126 * Returns:
2127 * 0 on success / other on failure
2128 **/
2129static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2130{
2131 struct ibmvfc_host *vhost = shost_priv(sdev->host);
Brian Kingad8dcff2008-10-29 08:46:41 -05002132 struct scsi_target *starget = scsi_target(sdev);
2133 struct fc_rport *rport = starget_to_rport(starget);
Brian King072b91f2008-07-01 13:14:30 -05002134 struct ibmvfc_tmf *tmf;
2135 struct ibmvfc_event *evt, *found_evt;
2136 union ibmvfc_iu rsp;
2137 int rsp_rc = -EBUSY;
2138 unsigned long flags;
2139 u16 status;
2140
2141 ENTER;
2142 spin_lock_irqsave(vhost->host->host_lock, flags);
2143 found_evt = NULL;
2144 list_for_each_entry(evt, &vhost->sent, queue) {
2145 if (evt->cmnd && evt->cmnd->device == sdev) {
2146 found_evt = evt;
2147 break;
2148 }
2149 }
2150
2151 if (!found_evt) {
2152 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2153 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2154 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2155 return 0;
2156 }
2157
2158 if (vhost->state == IBMVFC_ACTIVE) {
2159 evt = ibmvfc_get_event(vhost);
2160 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2161
2162 tmf = &evt->iu.tmf;
2163 memset(tmf, 0, sizeof(*tmf));
2164 tmf->common.version = 1;
2165 tmf->common.opcode = IBMVFC_TMF_MAD;
2166 tmf->common.length = sizeof(*tmf);
2167 tmf->scsi_id = rport->port_id;
2168 int_to_scsilun(sdev->lun, &tmf->lun);
2169 tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
2170 tmf->cancel_key = (unsigned long)sdev->hostdata;
Brian Kingad8dcff2008-10-29 08:46:41 -05002171 tmf->my_cancel_key = (unsigned long)starget->hostdata;
Brian King072b91f2008-07-01 13:14:30 -05002172
2173 evt->sync_iu = &rsp;
2174 init_completion(&evt->comp);
2175 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2176 }
2177
2178 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2179
2180 if (rsp_rc != 0) {
2181 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2182 return -EIO;
2183 }
2184
2185 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2186
2187 wait_for_completion(&evt->comp);
2188 status = rsp.mad_common.status;
2189 spin_lock_irqsave(vhost->host->host_lock, flags);
2190 ibmvfc_free_event(evt);
2191 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2192
2193 if (status != IBMVFC_MAD_SUCCESS) {
2194 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2195 return -EIO;
2196 }
2197
2198 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2199 return 0;
2200}
2201
2202/**
Brian Kingad8dcff2008-10-29 08:46:41 -05002203 * ibmvfc_match_target - Match function for specified target
2204 * @evt: ibmvfc event struct
2205 * @device: device to match (starget)
2206 *
2207 * Returns:
2208 * 1 if event matches starget / 0 if event does not match starget
2209 **/
2210static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2211{
2212 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2213 return 1;
2214 return 0;
2215}
2216
2217/**
2218 * ibmvfc_match_lun - Match function for specified LUN
2219 * @evt: ibmvfc event struct
2220 * @device: device to match (sdev)
2221 *
2222 * Returns:
2223 * 1 if event matches sdev / 0 if event does not match sdev
2224 **/
2225static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2226{
2227 if (evt->cmnd && evt->cmnd->device == device)
2228 return 1;
2229 return 0;
2230}
2231
2232/**
2233 * ibmvfc_wait_for_ops - Wait for ops to complete
2234 * @vhost: ibmvfc host struct
2235 * @device: device to match (starget or sdev)
2236 * @match: match function
2237 *
2238 * Returns:
2239 * SUCCESS / FAILED
2240 **/
2241static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2242 int (*match) (struct ibmvfc_event *, void *))
2243{
2244 struct ibmvfc_event *evt;
2245 DECLARE_COMPLETION_ONSTACK(comp);
2246 int wait;
2247 unsigned long flags;
2248 signed long timeout = init_timeout * HZ;
2249
2250 ENTER;
2251 do {
2252 wait = 0;
2253 spin_lock_irqsave(vhost->host->host_lock, flags);
2254 list_for_each_entry(evt, &vhost->sent, queue) {
2255 if (match(evt, device)) {
2256 evt->eh_comp = &comp;
2257 wait++;
2258 }
2259 }
2260 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2261
2262 if (wait) {
2263 timeout = wait_for_completion_timeout(&comp, timeout);
2264
2265 if (!timeout) {
2266 wait = 0;
2267 spin_lock_irqsave(vhost->host->host_lock, flags);
2268 list_for_each_entry(evt, &vhost->sent, queue) {
2269 if (match(evt, device)) {
2270 evt->eh_comp = NULL;
2271 wait++;
2272 }
2273 }
2274 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2275 if (wait)
2276 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2277 LEAVE;
2278 return wait ? FAILED : SUCCESS;
2279 }
2280 }
2281 } while (wait);
2282
2283 LEAVE;
2284 return SUCCESS;
2285}
2286
2287/**
Brian King072b91f2008-07-01 13:14:30 -05002288 * ibmvfc_eh_abort_handler - Abort a command
2289 * @cmd: scsi command to abort
2290 *
2291 * Returns:
2292 * SUCCESS / FAILED
2293 **/
2294static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2295{
Brian Kingad8dcff2008-10-29 08:46:41 -05002296 struct scsi_device *sdev = cmd->device;
2297 struct ibmvfc_host *vhost = shost_priv(sdev->host);
Brian King072b91f2008-07-01 13:14:30 -05002298 int cancel_rc, abort_rc;
Brian Kingad8dcff2008-10-29 08:46:41 -05002299 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05002300
2301 ENTER;
2302 ibmvfc_wait_while_resetting(vhost);
Brian Kingad8dcff2008-10-29 08:46:41 -05002303 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2304 abort_rc = ibmvfc_abort_task_set(sdev);
Brian King072b91f2008-07-01 13:14:30 -05002305
Brian Kingad8dcff2008-10-29 08:46:41 -05002306 if (!cancel_rc && !abort_rc)
2307 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
Brian King072b91f2008-07-01 13:14:30 -05002308
2309 LEAVE;
Brian Kingad8dcff2008-10-29 08:46:41 -05002310 return rc;
Brian King072b91f2008-07-01 13:14:30 -05002311}
2312
2313/**
2314 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2315 * @cmd: scsi command struct
2316 *
2317 * Returns:
2318 * SUCCESS / FAILED
2319 **/
2320static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2321{
Brian Kingad8dcff2008-10-29 08:46:41 -05002322 struct scsi_device *sdev = cmd->device;
2323 struct ibmvfc_host *vhost = shost_priv(sdev->host);
Brian King072b91f2008-07-01 13:14:30 -05002324 int cancel_rc, reset_rc;
Brian Kingad8dcff2008-10-29 08:46:41 -05002325 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05002326
2327 ENTER;
2328 ibmvfc_wait_while_resetting(vhost);
Brian Kingad8dcff2008-10-29 08:46:41 -05002329 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2330 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
Brian King072b91f2008-07-01 13:14:30 -05002331
Brian Kingad8dcff2008-10-29 08:46:41 -05002332 if (!cancel_rc && !reset_rc)
2333 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
Brian King072b91f2008-07-01 13:14:30 -05002334
2335 LEAVE;
Brian Kingad8dcff2008-10-29 08:46:41 -05002336 return rc;
Brian King072b91f2008-07-01 13:14:30 -05002337}
2338
2339/**
Brian King4a5c4a52009-10-19 15:07:53 -05002340 * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function
Brian King072b91f2008-07-01 13:14:30 -05002341 * @sdev: scsi device struct
2342 * @data: return code
2343 *
2344 **/
Brian King4a5c4a52009-10-19 15:07:53 -05002345static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data)
2346{
2347 unsigned long *rc = data;
2348 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2349}
2350
2351/**
2352 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2353 * @sdev: scsi device struct
2354 * @data: return code
2355 *
2356 **/
2357static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
Brian King072b91f2008-07-01 13:14:30 -05002358{
2359 unsigned long *rc = data;
2360 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2361}
2362
2363/**
2364 * ibmvfc_dev_abort_all - Device iterated abort task set function
2365 * @sdev: scsi device struct
2366 * @data: return code
2367 *
2368 **/
2369static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
2370{
2371 unsigned long *rc = data;
2372 *rc |= ibmvfc_abort_task_set(sdev);
2373}
2374
2375/**
2376 * ibmvfc_eh_target_reset_handler - Reset the target
2377 * @cmd: scsi command struct
2378 *
2379 * Returns:
2380 * SUCCESS / FAILED
2381 **/
2382static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2383{
Brian Kingad8dcff2008-10-29 08:46:41 -05002384 struct scsi_device *sdev = cmd->device;
2385 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2386 struct scsi_target *starget = scsi_target(sdev);
Brian King072b91f2008-07-01 13:14:30 -05002387 int reset_rc;
Brian Kingad8dcff2008-10-29 08:46:41 -05002388 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05002389 unsigned long cancel_rc = 0;
Brian King072b91f2008-07-01 13:14:30 -05002390
2391 ENTER;
2392 ibmvfc_wait_while_resetting(vhost);
Brian King4a5c4a52009-10-19 15:07:53 -05002393 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
Brian Kingad8dcff2008-10-29 08:46:41 -05002394 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
Brian King072b91f2008-07-01 13:14:30 -05002395
Brian Kingad8dcff2008-10-29 08:46:41 -05002396 if (!cancel_rc && !reset_rc)
2397 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
Brian King072b91f2008-07-01 13:14:30 -05002398
2399 LEAVE;
Brian Kingad8dcff2008-10-29 08:46:41 -05002400 return rc;
Brian King072b91f2008-07-01 13:14:30 -05002401}
2402
2403/**
2404 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2405 * @cmd: struct scsi_cmnd having problems
2406 *
2407 **/
2408static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2409{
2410 int rc;
2411 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2412
2413 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2414 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2415 return rc ? FAILED : SUCCESS;
2416}
2417
2418/**
2419 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2420 * @rport: rport struct
2421 *
2422 * Return value:
2423 * none
2424 **/
2425static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2426{
2427 struct scsi_target *starget = to_scsi_target(&rport->dev);
2428 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2429 struct ibmvfc_host *vhost = shost_priv(shost);
Brian King072b91f2008-07-01 13:14:30 -05002430 unsigned long cancel_rc = 0;
2431 unsigned long abort_rc = 0;
Brian Kingad8dcff2008-10-29 08:46:41 -05002432 int rc = FAILED;
Brian King072b91f2008-07-01 13:14:30 -05002433
2434 ENTER;
Brian King4a5c4a52009-10-19 15:07:53 -05002435 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts);
Brian King072b91f2008-07-01 13:14:30 -05002436 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
2437
Brian Kingad8dcff2008-10-29 08:46:41 -05002438 if (!cancel_rc && !abort_rc)
2439 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2440
2441 if (rc == FAILED)
Brian King072b91f2008-07-01 13:14:30 -05002442 ibmvfc_issue_fc_host_lip(shost);
Brian King072b91f2008-07-01 13:14:30 -05002443 LEAVE;
2444}
2445
2446static const struct {
2447 enum ibmvfc_async_event ae;
2448 const char *desc;
2449} ae_desc [] = {
2450 { IBMVFC_AE_ELS_PLOGI, "PLOGI" },
2451 { IBMVFC_AE_ELS_LOGO, "LOGO" },
2452 { IBMVFC_AE_ELS_PRLO, "PRLO" },
2453 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" },
2454 { IBMVFC_AE_SCN_GROUP, "Group SCN" },
2455 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" },
2456 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" },
2457 { IBMVFC_AE_LINK_UP, "Link Up" },
2458 { IBMVFC_AE_LINK_DOWN, "Link Down" },
2459 { IBMVFC_AE_LINK_DEAD, "Link Dead" },
2460 { IBMVFC_AE_HALT, "Halt" },
2461 { IBMVFC_AE_RESUME, "Resume" },
2462 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" },
2463};
2464
2465static const char *unknown_ae = "Unknown async";
2466
2467/**
2468 * ibmvfc_get_ae_desc - Get text description for async event
2469 * @ae: async event
2470 *
2471 **/
2472static const char *ibmvfc_get_ae_desc(u64 ae)
2473{
2474 int i;
2475
2476 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2477 if (ae_desc[i].ae == ae)
2478 return ae_desc[i].desc;
2479
2480 return unknown_ae;
2481}
2482
2483/**
2484 * ibmvfc_handle_async - Handle an async event from the adapter
2485 * @crq: crq to process
2486 * @vhost: ibmvfc host struct
2487 *
2488 **/
2489static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2490 struct ibmvfc_host *vhost)
2491{
2492 const char *desc = ibmvfc_get_ae_desc(crq->event);
Brian King6d29cc52009-05-28 16:17:33 -05002493 struct ibmvfc_target *tgt;
Brian King072b91f2008-07-01 13:14:30 -05002494
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002495 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
2496 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
Brian King072b91f2008-07-01 13:14:30 -05002497
2498 switch (crq->event) {
Brian King072b91f2008-07-01 13:14:30 -05002499 case IBMVFC_AE_RESUME:
Brian King497f9c52009-05-28 16:17:30 -05002500 switch (crq->link_state) {
2501 case IBMVFC_AE_LS_LINK_DOWN:
2502 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2503 break;
2504 case IBMVFC_AE_LS_LINK_DEAD:
2505 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2506 break;
2507 case IBMVFC_AE_LS_LINK_UP:
2508 case IBMVFC_AE_LS_LINK_BOUNCED:
2509 default:
2510 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2511 vhost->delay_init = 1;
2512 __ibmvfc_reset_host(vhost);
2513 break;
2514 };
2515
2516 break;
2517 case IBMVFC_AE_LINK_UP:
Brian King072b91f2008-07-01 13:14:30 -05002518 vhost->events_to_log |= IBMVFC_AE_LINKUP;
Brian Kingd2131b32008-12-18 09:26:51 -06002519 vhost->delay_init = 1;
2520 __ibmvfc_reset_host(vhost);
Brian King072b91f2008-07-01 13:14:30 -05002521 break;
2522 case IBMVFC_AE_SCN_FABRIC:
Brian Kingd2131b32008-12-18 09:26:51 -06002523 case IBMVFC_AE_SCN_DOMAIN:
Brian King072b91f2008-07-01 13:14:30 -05002524 vhost->events_to_log |= IBMVFC_AE_RSCN;
Brian Kingd2131b32008-12-18 09:26:51 -06002525 vhost->delay_init = 1;
2526 __ibmvfc_reset_host(vhost);
Brian King072b91f2008-07-01 13:14:30 -05002527 break;
2528 case IBMVFC_AE_SCN_NPORT:
2529 case IBMVFC_AE_SCN_GROUP:
Brian King072b91f2008-07-01 13:14:30 -05002530 vhost->events_to_log |= IBMVFC_AE_RSCN;
Brian King6d29cc52009-05-28 16:17:33 -05002531 ibmvfc_reinit_host(vhost);
2532 break;
Brian King072b91f2008-07-01 13:14:30 -05002533 case IBMVFC_AE_ELS_LOGO:
2534 case IBMVFC_AE_ELS_PRLO:
2535 case IBMVFC_AE_ELS_PLOGI:
Brian King6d29cc52009-05-28 16:17:33 -05002536 list_for_each_entry(tgt, &vhost->targets, queue) {
2537 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2538 break;
2539 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id)
2540 continue;
2541 if (crq->wwpn && tgt->ids.port_name != crq->wwpn)
2542 continue;
2543 if (crq->node_name && tgt->ids.node_name != crq->node_name)
2544 continue;
Brian King017b2ae2009-06-18 09:06:55 -05002545 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO)
2546 tgt->logo_rcvd = 1;
2547 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) {
2548 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2549 ibmvfc_reinit_host(vhost);
2550 }
Brian King6d29cc52009-05-28 16:17:33 -05002551 }
Brian King072b91f2008-07-01 13:14:30 -05002552 break;
2553 case IBMVFC_AE_LINK_DOWN:
2554 case IBMVFC_AE_ADAPTER_FAILED:
2555 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2556 break;
2557 case IBMVFC_AE_LINK_DEAD:
2558 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2559 break;
2560 case IBMVFC_AE_HALT:
2561 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2562 break;
2563 default:
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002564 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
Brian King072b91f2008-07-01 13:14:30 -05002565 break;
2566 };
2567}
2568
2569/**
2570 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2571 * @crq: Command/Response queue
2572 * @vhost: ibmvfc host struct
2573 *
2574 **/
2575static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2576{
2577 long rc;
2578 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba;
2579
2580 switch (crq->valid) {
2581 case IBMVFC_CRQ_INIT_RSP:
2582 switch (crq->format) {
2583 case IBMVFC_CRQ_INIT:
2584 dev_info(vhost->dev, "Partner initialized\n");
2585 /* Send back a response */
2586 rc = ibmvfc_send_crq_init_complete(vhost);
2587 if (rc == 0)
Brian King861890c2009-10-19 15:07:49 -05002588 ibmvfc_init_host(vhost);
Brian King072b91f2008-07-01 13:14:30 -05002589 else
2590 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2591 break;
2592 case IBMVFC_CRQ_INIT_COMPLETE:
2593 dev_info(vhost->dev, "Partner initialization complete\n");
Brian King861890c2009-10-19 15:07:49 -05002594 ibmvfc_init_host(vhost);
Brian King072b91f2008-07-01 13:14:30 -05002595 break;
2596 default:
2597 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2598 }
2599 return;
2600 case IBMVFC_CRQ_XPORT_EVENT:
2601 vhost->state = IBMVFC_NO_CRQ;
Brian King79111d02009-05-28 16:17:29 -05002602 vhost->logged_in = 0;
Brian King072b91f2008-07-01 13:14:30 -05002603 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2604 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2605 /* We need to re-setup the interpartition connection */
2606 dev_info(vhost->dev, "Re-enabling adapter\n");
2607 vhost->client_migrated = 1;
2608 ibmvfc_purge_requests(vhost, DID_REQUEUE);
2609 if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
2610 (rc = ibmvfc_send_crq_init(vhost))) {
2611 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2612 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
2613 } else
2614 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2615 } else {
2616 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
2617
2618 ibmvfc_purge_requests(vhost, DID_ERROR);
2619 if ((rc = ibmvfc_reset_crq(vhost)) ||
2620 (rc = ibmvfc_send_crq_init(vhost))) {
2621 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2622 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
2623 } else
2624 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2625 }
2626 return;
2627 case IBMVFC_CRQ_CMD_RSP:
2628 break;
2629 default:
2630 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2631 return;
2632 }
2633
2634 if (crq->format == IBMVFC_ASYNC_EVENT)
2635 return;
2636
2637 /* The only kind of payload CRQs we should get are responses to
2638 * things we send. Make sure this response is to something we
2639 * actually sent
2640 */
2641 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002642 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
Brian King072b91f2008-07-01 13:14:30 -05002643 crq->ioba);
2644 return;
2645 }
2646
2647 if (unlikely(atomic_read(&evt->free))) {
Stephen Rothwell775a42e2009-01-06 14:59:00 +00002648 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
Brian King072b91f2008-07-01 13:14:30 -05002649 crq->ioba);
2650 return;
2651 }
2652
2653 del_timer(&evt->timer);
2654 list_del(&evt->queue);
2655 ibmvfc_trc_end(evt);
2656 evt->done(evt);
2657}
2658
2659/**
2660 * ibmvfc_scan_finished - Check if the device scan is done.
2661 * @shost: scsi host struct
2662 * @time: current elapsed time
2663 *
2664 * Returns:
2665 * 0 if scan is not done / 1 if scan is done
2666 **/
2667static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2668{
2669 unsigned long flags;
2670 struct ibmvfc_host *vhost = shost_priv(shost);
2671 int done = 0;
2672
2673 spin_lock_irqsave(shost->host_lock, flags);
2674 if (time >= (init_timeout * HZ)) {
2675 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2676 "continuing initialization\n", init_timeout);
2677 done = 1;
2678 }
2679
Brian King43c8da92009-05-28 16:17:28 -05002680 if (vhost->scan_complete)
Brian King072b91f2008-07-01 13:14:30 -05002681 done = 1;
2682 spin_unlock_irqrestore(shost->host_lock, flags);
2683 return done;
2684}
2685
2686/**
2687 * ibmvfc_slave_alloc - Setup the device's task set value
2688 * @sdev: struct scsi_device device to configure
2689 *
2690 * Set the device's task set value so that error handling works as
2691 * expected.
2692 *
2693 * Returns:
2694 * 0 on success / -ENXIO if device does not exist
2695 **/
2696static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2697{
2698 struct Scsi_Host *shost = sdev->host;
2699 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2700 struct ibmvfc_host *vhost = shost_priv(shost);
2701 unsigned long flags = 0;
2702
2703 if (!rport || fc_remote_port_chkready(rport))
2704 return -ENXIO;
2705
2706 spin_lock_irqsave(shost->host_lock, flags);
2707 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2708 spin_unlock_irqrestore(shost->host_lock, flags);
2709 return 0;
2710}
2711
2712/**
Brian Kingad8dcff2008-10-29 08:46:41 -05002713 * ibmvfc_target_alloc - Setup the target's task set value
2714 * @starget: struct scsi_target
2715 *
2716 * Set the target's task set value so that error handling works as
2717 * expected.
2718 *
2719 * Returns:
2720 * 0 on success / -ENXIO if device does not exist
2721 **/
2722static int ibmvfc_target_alloc(struct scsi_target *starget)
2723{
2724 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2725 struct ibmvfc_host *vhost = shost_priv(shost);
2726 unsigned long flags = 0;
2727
2728 spin_lock_irqsave(shost->host_lock, flags);
2729 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2730 spin_unlock_irqrestore(shost->host_lock, flags);
2731 return 0;
2732}
2733
2734/**
Brian King072b91f2008-07-01 13:14:30 -05002735 * ibmvfc_slave_configure - Configure the device
2736 * @sdev: struct scsi_device device to configure
2737 *
2738 * Enable allow_restart for a device if it is a disk. Adjust the
2739 * queue_depth here also.
2740 *
2741 * Returns:
2742 * 0
2743 **/
2744static int ibmvfc_slave_configure(struct scsi_device *sdev)
2745{
2746 struct Scsi_Host *shost = sdev->host;
2747 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
2748 unsigned long flags = 0;
2749
2750 spin_lock_irqsave(shost->host_lock, flags);
2751 if (sdev->type == TYPE_DISK)
2752 sdev->allow_restart = 1;
2753
2754 if (sdev->tagged_supported) {
2755 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
2756 scsi_activate_tcq(sdev, sdev->queue_depth);
2757 } else
2758 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2759
2760 rport->dev_loss_tmo = dev_loss_tmo;
2761 spin_unlock_irqrestore(shost->host_lock, flags);
2762 return 0;
2763}
2764
2765/**
2766 * ibmvfc_change_queue_depth - Change the device's queue depth
2767 * @sdev: scsi device struct
2768 * @qdepth: depth to set
Mike Christiee881a172009-10-15 17:46:39 -07002769 * @reason: calling context
Brian King072b91f2008-07-01 13:14:30 -05002770 *
2771 * Return value:
2772 * actual depth set
2773 **/
Mike Christiee881a172009-10-15 17:46:39 -07002774static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth,
2775 int reason)
Brian King072b91f2008-07-01 13:14:30 -05002776{
Mike Christiee881a172009-10-15 17:46:39 -07002777 if (reason != SCSI_QDEPTH_DEFAULT)
2778 return -EOPNOTSUPP;
2779
Brian King072b91f2008-07-01 13:14:30 -05002780 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2781 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2782
2783 scsi_adjust_queue_depth(sdev, 0, qdepth);
2784 return sdev->queue_depth;
2785}
2786
2787/**
2788 * ibmvfc_change_queue_type - Change the device's queue type
2789 * @sdev: scsi device struct
2790 * @tag_type: type of tags to use
2791 *
2792 * Return value:
2793 * actual queue type set
2794 **/
2795static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type)
2796{
2797 if (sdev->tagged_supported) {
2798 scsi_set_tag_type(sdev, tag_type);
2799
2800 if (tag_type)
2801 scsi_activate_tcq(sdev, sdev->queue_depth);
2802 else
2803 scsi_deactivate_tcq(sdev, sdev->queue_depth);
2804 } else
2805 tag_type = 0;
2806
2807 return tag_type;
2808}
2809
2810static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2811 struct device_attribute *attr, char *buf)
2812{
2813 struct Scsi_Host *shost = class_to_shost(dev);
2814 struct ibmvfc_host *vhost = shost_priv(shost);
2815
2816 return snprintf(buf, PAGE_SIZE, "%s\n",
2817 vhost->login_buf->resp.partition_name);
2818}
2819
Brian King072b91f2008-07-01 13:14:30 -05002820static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2821 struct device_attribute *attr, char *buf)
2822{
2823 struct Scsi_Host *shost = class_to_shost(dev);
2824 struct ibmvfc_host *vhost = shost_priv(shost);
2825
2826 return snprintf(buf, PAGE_SIZE, "%s\n",
2827 vhost->login_buf->resp.device_name);
2828}
2829
Brian King072b91f2008-07-01 13:14:30 -05002830static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2831 struct device_attribute *attr, char *buf)
2832{
2833 struct Scsi_Host *shost = class_to_shost(dev);
2834 struct ibmvfc_host *vhost = shost_priv(shost);
2835
2836 return snprintf(buf, PAGE_SIZE, "%s\n",
2837 vhost->login_buf->resp.port_loc_code);
2838}
2839
Brian King072b91f2008-07-01 13:14:30 -05002840static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2841 struct device_attribute *attr, char *buf)
2842{
2843 struct Scsi_Host *shost = class_to_shost(dev);
2844 struct ibmvfc_host *vhost = shost_priv(shost);
2845
2846 return snprintf(buf, PAGE_SIZE, "%s\n",
2847 vhost->login_buf->resp.drc_name);
2848}
2849
Brian King072b91f2008-07-01 13:14:30 -05002850static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2851 struct device_attribute *attr, char *buf)
2852{
2853 struct Scsi_Host *shost = class_to_shost(dev);
2854 struct ibmvfc_host *vhost = shost_priv(shost);
2855 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2856}
2857
Brian King497f9c52009-05-28 16:17:30 -05002858static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2859 struct device_attribute *attr, char *buf)
2860{
2861 struct Scsi_Host *shost = class_to_shost(dev);
2862 struct ibmvfc_host *vhost = shost_priv(shost);
2863 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2864}
2865
Brian King072b91f2008-07-01 13:14:30 -05002866/**
2867 * ibmvfc_show_log_level - Show the adapter's error logging level
2868 * @dev: class device struct
2869 * @buf: buffer
2870 *
2871 * Return value:
2872 * number of bytes printed to buffer
2873 **/
2874static ssize_t ibmvfc_show_log_level(struct device *dev,
2875 struct device_attribute *attr, char *buf)
2876{
2877 struct Scsi_Host *shost = class_to_shost(dev);
2878 struct ibmvfc_host *vhost = shost_priv(shost);
2879 unsigned long flags = 0;
2880 int len;
2881
2882 spin_lock_irqsave(shost->host_lock, flags);
2883 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2884 spin_unlock_irqrestore(shost->host_lock, flags);
2885 return len;
2886}
2887
2888/**
2889 * ibmvfc_store_log_level - Change the adapter's error logging level
2890 * @dev: class device struct
2891 * @buf: buffer
2892 *
2893 * Return value:
2894 * number of bytes printed to buffer
2895 **/
2896static ssize_t ibmvfc_store_log_level(struct device *dev,
2897 struct device_attribute *attr,
2898 const char *buf, size_t count)
2899{
2900 struct Scsi_Host *shost = class_to_shost(dev);
2901 struct ibmvfc_host *vhost = shost_priv(shost);
2902 unsigned long flags = 0;
2903
2904 spin_lock_irqsave(shost->host_lock, flags);
2905 vhost->log_level = simple_strtoul(buf, NULL, 10);
2906 spin_unlock_irqrestore(shost->host_lock, flags);
2907 return strlen(buf);
2908}
2909
Brian King85e23992009-05-28 16:17:25 -05002910static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
2911static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
2912static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
2913static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
2914static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
Brian King497f9c52009-05-28 16:17:30 -05002915static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
Brian King85e23992009-05-28 16:17:25 -05002916static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
2917 ibmvfc_show_log_level, ibmvfc_store_log_level);
Brian King072b91f2008-07-01 13:14:30 -05002918
2919#ifdef CONFIG_SCSI_IBMVFC_TRACE
2920/**
2921 * ibmvfc_read_trace - Dump the adapter trace
2922 * @kobj: kobject struct
2923 * @bin_attr: bin_attribute struct
2924 * @buf: buffer
2925 * @off: offset
2926 * @count: buffer size
2927 *
2928 * Return value:
2929 * number of bytes printed to buffer
2930 **/
2931static ssize_t ibmvfc_read_trace(struct kobject *kobj,
2932 struct bin_attribute *bin_attr,
2933 char *buf, loff_t off, size_t count)
2934{
2935 struct device *dev = container_of(kobj, struct device, kobj);
2936 struct Scsi_Host *shost = class_to_shost(dev);
2937 struct ibmvfc_host *vhost = shost_priv(shost);
2938 unsigned long flags = 0;
2939 int size = IBMVFC_TRACE_SIZE;
2940 char *src = (char *)vhost->trace;
2941
2942 if (off > size)
2943 return 0;
2944 if (off + count > size) {
2945 size -= off;
2946 count = size;
2947 }
2948
2949 spin_lock_irqsave(shost->host_lock, flags);
2950 memcpy(buf, &src[off], count);
2951 spin_unlock_irqrestore(shost->host_lock, flags);
2952 return count;
2953}
2954
2955static struct bin_attribute ibmvfc_trace_attr = {
2956 .attr = {
2957 .name = "trace",
2958 .mode = S_IRUGO,
2959 },
2960 .size = 0,
2961 .read = ibmvfc_read_trace,
2962};
2963#endif
2964
2965static struct device_attribute *ibmvfc_attrs[] = {
Brian King85e23992009-05-28 16:17:25 -05002966 &dev_attr_partition_name,
2967 &dev_attr_device_name,
2968 &dev_attr_port_loc_code,
2969 &dev_attr_drc_name,
2970 &dev_attr_npiv_version,
Brian King497f9c52009-05-28 16:17:30 -05002971 &dev_attr_capabilities,
Brian King85e23992009-05-28 16:17:25 -05002972 &dev_attr_log_level,
Brian King072b91f2008-07-01 13:14:30 -05002973 NULL
2974};
2975
2976static struct scsi_host_template driver_template = {
2977 .module = THIS_MODULE,
2978 .name = "IBM POWER Virtual FC Adapter",
2979 .proc_name = IBMVFC_NAME,
2980 .queuecommand = ibmvfc_queuecommand,
2981 .eh_abort_handler = ibmvfc_eh_abort_handler,
2982 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
2983 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
2984 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
2985 .slave_alloc = ibmvfc_slave_alloc,
2986 .slave_configure = ibmvfc_slave_configure,
Brian Kingad8dcff2008-10-29 08:46:41 -05002987 .target_alloc = ibmvfc_target_alloc,
Brian King072b91f2008-07-01 13:14:30 -05002988 .scan_finished = ibmvfc_scan_finished,
2989 .change_queue_depth = ibmvfc_change_queue_depth,
2990 .change_queue_type = ibmvfc_change_queue_type,
2991 .cmd_per_lun = 16,
2992 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
2993 .this_id = -1,
2994 .sg_tablesize = SG_ALL,
2995 .max_sectors = IBMVFC_MAX_SECTORS,
2996 .use_clustering = ENABLE_CLUSTERING,
2997 .shost_attrs = ibmvfc_attrs,
2998};
2999
3000/**
3001 * ibmvfc_next_async_crq - Returns the next entry in async queue
3002 * @vhost: ibmvfc host struct
3003 *
3004 * Returns:
3005 * Pointer to next entry in queue / NULL if empty
3006 **/
3007static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3008{
3009 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3010 struct ibmvfc_async_crq *crq;
3011
3012 crq = &async_crq->msgs[async_crq->cur];
3013 if (crq->valid & 0x80) {
3014 if (++async_crq->cur == async_crq->size)
3015 async_crq->cur = 0;
3016 } else
3017 crq = NULL;
3018
3019 return crq;
3020}
3021
3022/**
3023 * ibmvfc_next_crq - Returns the next entry in message queue
3024 * @vhost: ibmvfc host struct
3025 *
3026 * Returns:
3027 * Pointer to next entry in queue / NULL if empty
3028 **/
3029static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3030{
3031 struct ibmvfc_crq_queue *queue = &vhost->crq;
3032 struct ibmvfc_crq *crq;
3033
3034 crq = &queue->msgs[queue->cur];
3035 if (crq->valid & 0x80) {
3036 if (++queue->cur == queue->size)
3037 queue->cur = 0;
3038 } else
3039 crq = NULL;
3040
3041 return crq;
3042}
3043
3044/**
3045 * ibmvfc_interrupt - Interrupt handler
3046 * @irq: number of irq to handle, not used
3047 * @dev_instance: ibmvfc_host that received interrupt
3048 *
3049 * Returns:
3050 * IRQ_HANDLED
3051 **/
3052static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3053{
3054 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
Brian King039a0892009-03-20 15:44:35 -05003055 unsigned long flags;
3056
3057 spin_lock_irqsave(vhost->host->host_lock, flags);
3058 vio_disable_interrupts(to_vio_dev(vhost->dev));
3059 tasklet_schedule(&vhost->tasklet);
3060 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3061 return IRQ_HANDLED;
3062}
3063
3064/**
3065 * ibmvfc_tasklet - Interrupt handler tasklet
3066 * @data: ibmvfc host struct
3067 *
3068 * Returns:
3069 * Nothing
3070 **/
3071static void ibmvfc_tasklet(void *data)
3072{
3073 struct ibmvfc_host *vhost = data;
Brian King072b91f2008-07-01 13:14:30 -05003074 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3075 struct ibmvfc_crq *crq;
3076 struct ibmvfc_async_crq *async;
3077 unsigned long flags;
3078 int done = 0;
3079
3080 spin_lock_irqsave(vhost->host->host_lock, flags);
Brian King072b91f2008-07-01 13:14:30 -05003081 while (!done) {
Brian King072b91f2008-07-01 13:14:30 -05003082 /* Pull all the valid messages off the async CRQ */
3083 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3084 ibmvfc_handle_async(async, vhost);
3085 async->valid = 0;
3086 }
3087
Brian Kingf1d7fb72009-06-18 09:06:52 -05003088 /* Pull all the valid messages off the CRQ */
3089 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
Brian King072b91f2008-07-01 13:14:30 -05003090 ibmvfc_handle_crq(crq, vhost);
3091 crq->valid = 0;
Brian Kingf1d7fb72009-06-18 09:06:52 -05003092 }
3093
3094 vio_enable_interrupts(vdev);
3095 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
Brian King072b91f2008-07-01 13:14:30 -05003096 vio_disable_interrupts(vdev);
3097 ibmvfc_handle_async(async, vhost);
Brian King4081b772008-11-14 13:33:50 -06003098 async->valid = 0;
Brian Kingf1d7fb72009-06-18 09:06:52 -05003099 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3100 vio_disable_interrupts(vdev);
3101 ibmvfc_handle_crq(crq, vhost);
3102 crq->valid = 0;
Brian King072b91f2008-07-01 13:14:30 -05003103 } else
3104 done = 1;
3105 }
3106
3107 spin_unlock_irqrestore(vhost->host->host_lock, flags);
Brian King072b91f2008-07-01 13:14:30 -05003108}
3109
3110/**
3111 * ibmvfc_init_tgt - Set the next init job step for the target
3112 * @tgt: ibmvfc target struct
3113 * @job_step: job step to perform
3114 *
3115 **/
3116static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3117 void (*job_step) (struct ibmvfc_target *))
3118{
3119 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3120 tgt->job_step = job_step;
3121 wake_up(&tgt->vhost->work_wait_q);
3122}
3123
3124/**
3125 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3126 * @tgt: ibmvfc target struct
3127 * @job_step: initialization job step
3128 *
Brian King7d0e4622009-05-28 16:17:26 -05003129 * Returns: 1 if step will be retried / 0 if not
3130 *
Brian King072b91f2008-07-01 13:14:30 -05003131 **/
Brian King7d0e4622009-05-28 16:17:26 -05003132static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
Brian King072b91f2008-07-01 13:14:30 -05003133 void (*job_step) (struct ibmvfc_target *))
3134{
Brian King1c41fa822008-12-03 11:02:54 -06003135 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
Brian King072b91f2008-07-01 13:14:30 -05003136 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3137 wake_up(&tgt->vhost->work_wait_q);
Brian King7d0e4622009-05-28 16:17:26 -05003138 return 0;
Brian King072b91f2008-07-01 13:14:30 -05003139 } else
3140 ibmvfc_init_tgt(tgt, job_step);
Brian King7d0e4622009-05-28 16:17:26 -05003141 return 1;
Brian King072b91f2008-07-01 13:14:30 -05003142}
3143
Brian Kinga3b7aea2009-02-02 18:39:40 -06003144/* Defined in FC-LS */
3145static const struct {
3146 int code;
3147 int retry;
3148 int logged_in;
3149} prli_rsp [] = {
3150 { 0, 1, 0 },
3151 { 1, 0, 1 },
3152 { 2, 1, 0 },
3153 { 3, 1, 0 },
3154 { 4, 0, 0 },
3155 { 5, 0, 0 },
3156 { 6, 0, 1 },
3157 { 7, 0, 0 },
3158 { 8, 1, 0 },
3159};
3160
3161/**
3162 * ibmvfc_get_prli_rsp - Find PRLI response index
3163 * @flags: PRLI response flags
3164 *
3165 **/
3166static int ibmvfc_get_prli_rsp(u16 flags)
3167{
3168 int i;
3169 int code = (flags & 0x0f00) >> 8;
3170
3171 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3172 if (prli_rsp[i].code == code)
3173 return i;
3174
3175 return 0;
3176}
3177
Brian King072b91f2008-07-01 13:14:30 -05003178/**
Brian King072b91f2008-07-01 13:14:30 -05003179 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3180 * @evt: ibmvfc event struct
3181 *
3182 **/
3183static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3184{
3185 struct ibmvfc_target *tgt = evt->tgt;
3186 struct ibmvfc_host *vhost = evt->vhost;
3187 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
Brian Kinga3b7aea2009-02-02 18:39:40 -06003188 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
Brian King072b91f2008-07-01 13:14:30 -05003189 u32 status = rsp->common.status;
Brian King7d0e4622009-05-28 16:17:26 -05003190 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
Brian King072b91f2008-07-01 13:14:30 -05003191
3192 vhost->discovery_threads--;
3193 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3194 switch (status) {
3195 case IBMVFC_MAD_SUCCESS:
Brian Kinga3b7aea2009-02-02 18:39:40 -06003196 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3197 parms->type, parms->flags, parms->service_parms);
3198
3199 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3200 index = ibmvfc_get_prli_rsp(parms->flags);
3201 if (prli_rsp[index].logged_in) {
3202 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
3203 tgt->need_login = 0;
3204 tgt->ids.roles = 0;
3205 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
3206 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3207 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
3208 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
Brian King43c8da92009-05-28 16:17:28 -05003209 tgt->add_rport = 1;
Brian Kinga3b7aea2009-02-02 18:39:40 -06003210 } else
3211 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3212 } else if (prli_rsp[index].retry)
3213 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3214 else
3215 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3216 } else
3217 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King072b91f2008-07-01 13:14:30 -05003218 break;
3219 case IBMVFC_MAD_DRIVER_FAILED:
3220 break;
3221 case IBMVFC_MAD_CRQ_ERROR:
3222 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3223 break;
3224 case IBMVFC_MAD_FAILED:
3225 default:
Brian King017b2ae2009-06-18 09:06:55 -05003226 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED)
3227 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3228 else if (tgt->logo_rcvd)
3229 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3230 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
Brian King7d0e4622009-05-28 16:17:26 -05003231 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
Brian King10e79492008-10-29 08:46:45 -05003232 else
3233 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King7d0e4622009-05-28 16:17:26 -05003234
3235 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3236 ibmvfc_get_cmd_error(rsp->status, rsp->error),
3237 rsp->status, rsp->error, status);
Brian King072b91f2008-07-01 13:14:30 -05003238 break;
3239 };
3240
3241 kref_put(&tgt->kref, ibmvfc_release_tgt);
3242 ibmvfc_free_event(evt);
3243 wake_up(&vhost->work_wait_q);
3244}
3245
3246/**
3247 * ibmvfc_tgt_send_prli - Send a process login
3248 * @tgt: ibmvfc target struct
3249 *
3250 **/
3251static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3252{
3253 struct ibmvfc_process_login *prli;
3254 struct ibmvfc_host *vhost = tgt->vhost;
3255 struct ibmvfc_event *evt;
3256
3257 if (vhost->discovery_threads >= disc_threads)
3258 return;
3259
3260 kref_get(&tgt->kref);
3261 evt = ibmvfc_get_event(vhost);
3262 vhost->discovery_threads++;
3263 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3264 evt->tgt = tgt;
3265 prli = &evt->iu.prli;
3266 memset(prli, 0, sizeof(*prli));
3267 prli->common.version = 1;
3268 prli->common.opcode = IBMVFC_PROCESS_LOGIN;
3269 prli->common.length = sizeof(*prli);
3270 prli->scsi_id = tgt->scsi_id;
3271
3272 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
3273 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR;
3274 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC;
3275
3276 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3277 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3278 vhost->discovery_threads--;
3279 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3280 kref_put(&tgt->kref, ibmvfc_release_tgt);
3281 } else
3282 tgt_dbg(tgt, "Sent process login\n");
3283}
3284
3285/**
3286 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3287 * @evt: ibmvfc event struct
3288 *
3289 **/
3290static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3291{
3292 struct ibmvfc_target *tgt = evt->tgt;
3293 struct ibmvfc_host *vhost = evt->vhost;
3294 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
3295 u32 status = rsp->common.status;
Brian King7d0e4622009-05-28 16:17:26 -05003296 int level = IBMVFC_DEFAULT_LOG_LEVEL;
Brian King072b91f2008-07-01 13:14:30 -05003297
3298 vhost->discovery_threads--;
3299 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3300 switch (status) {
3301 case IBMVFC_MAD_SUCCESS:
3302 tgt_dbg(tgt, "Port Login succeeded\n");
3303 if (tgt->ids.port_name &&
3304 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3305 vhost->reinit = 1;
3306 tgt_dbg(tgt, "Port re-init required\n");
3307 break;
3308 }
3309 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3310 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3311 tgt->ids.port_id = tgt->scsi_id;
Brian King072b91f2008-07-01 13:14:30 -05003312 memcpy(&tgt->service_parms, &rsp->service_parms,
3313 sizeof(tgt->service_parms));
3314 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3315 sizeof(tgt->service_parms_change));
3316 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3317 break;
3318 case IBMVFC_MAD_DRIVER_FAILED:
3319 break;
3320 case IBMVFC_MAD_CRQ_ERROR:
3321 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3322 break;
3323 case IBMVFC_MAD_FAILED:
3324 default:
Brian King7d0e4622009-05-28 16:17:26 -05003325 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
3326 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3327 else
3328 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3329
3330 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
Brian King072b91f2008-07-01 13:14:30 -05003331 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3332 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3333 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status);
Brian King072b91f2008-07-01 13:14:30 -05003334 break;
3335 };
3336
3337 kref_put(&tgt->kref, ibmvfc_release_tgt);
3338 ibmvfc_free_event(evt);
3339 wake_up(&vhost->work_wait_q);
3340}
3341
3342/**
3343 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3344 * @tgt: ibmvfc target struct
3345 *
3346 **/
3347static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3348{
3349 struct ibmvfc_port_login *plogi;
3350 struct ibmvfc_host *vhost = tgt->vhost;
3351 struct ibmvfc_event *evt;
3352
3353 if (vhost->discovery_threads >= disc_threads)
3354 return;
3355
3356 kref_get(&tgt->kref);
Brian King017b2ae2009-06-18 09:06:55 -05003357 tgt->logo_rcvd = 0;
Brian King072b91f2008-07-01 13:14:30 -05003358 evt = ibmvfc_get_event(vhost);
3359 vhost->discovery_threads++;
3360 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3361 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3362 evt->tgt = tgt;
3363 plogi = &evt->iu.plogi;
3364 memset(plogi, 0, sizeof(*plogi));
3365 plogi->common.version = 1;
3366 plogi->common.opcode = IBMVFC_PORT_LOGIN;
3367 plogi->common.length = sizeof(*plogi);
3368 plogi->scsi_id = tgt->scsi_id;
3369
3370 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3371 vhost->discovery_threads--;
3372 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3373 kref_put(&tgt->kref, ibmvfc_release_tgt);
3374 } else
3375 tgt_dbg(tgt, "Sent port login\n");
3376}
3377
3378/**
3379 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3380 * @evt: ibmvfc event struct
3381 *
3382 **/
3383static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3384{
3385 struct ibmvfc_target *tgt = evt->tgt;
3386 struct ibmvfc_host *vhost = evt->vhost;
3387 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
3388 u32 status = rsp->common.status;
3389
3390 vhost->discovery_threads--;
3391 ibmvfc_free_event(evt);
3392 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3393
3394 switch (status) {
3395 case IBMVFC_MAD_SUCCESS:
3396 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3397 break;
3398 case IBMVFC_MAD_DRIVER_FAILED:
3399 kref_put(&tgt->kref, ibmvfc_release_tgt);
3400 wake_up(&vhost->work_wait_q);
3401 return;
3402 case IBMVFC_MAD_FAILED:
3403 default:
3404 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3405 break;
3406 };
3407
3408 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3409 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3410 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3411 tgt->scsi_id != tgt->new_scsi_id)
3412 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3413 kref_put(&tgt->kref, ibmvfc_release_tgt);
3414 wake_up(&vhost->work_wait_q);
3415}
3416
3417/**
3418 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3419 * @tgt: ibmvfc target struct
3420 *
3421 **/
3422static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3423{
3424 struct ibmvfc_implicit_logout *mad;
3425 struct ibmvfc_host *vhost = tgt->vhost;
3426 struct ibmvfc_event *evt;
3427
3428 if (vhost->discovery_threads >= disc_threads)
3429 return;
3430
3431 kref_get(&tgt->kref);
3432 evt = ibmvfc_get_event(vhost);
3433 vhost->discovery_threads++;
3434 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3435 evt->tgt = tgt;
3436 mad = &evt->iu.implicit_logout;
3437 memset(mad, 0, sizeof(*mad));
3438 mad->common.version = 1;
3439 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT;
3440 mad->common.length = sizeof(*mad);
3441 mad->old_scsi_id = tgt->scsi_id;
3442
3443 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3444 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3445 vhost->discovery_threads--;
3446 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3447 kref_put(&tgt->kref, ibmvfc_release_tgt);
3448 } else
3449 tgt_dbg(tgt, "Sent Implicit Logout\n");
3450}
3451
3452/**
Brian King989b8542008-07-22 08:31:47 -05003453 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3454 * @mad: ibmvfc passthru mad struct
3455 * @tgt: ibmvfc target struct
3456 *
3457 * Returns:
3458 * 1 if PLOGI needed / 0 if PLOGI not needed
3459 **/
3460static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3461 struct ibmvfc_target *tgt)
3462{
3463 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
3464 sizeof(tgt->ids.port_name)))
3465 return 1;
3466 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
3467 sizeof(tgt->ids.node_name)))
3468 return 1;
3469 if (mad->fc_iu.response[6] != tgt->scsi_id)
3470 return 1;
3471 return 0;
3472}
3473
3474/**
3475 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3476 * @evt: ibmvfc event struct
3477 *
3478 **/
3479static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3480{
3481 struct ibmvfc_target *tgt = evt->tgt;
3482 struct ibmvfc_host *vhost = evt->vhost;
3483 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
3484 u32 status = mad->common.status;
3485 u8 fc_reason, fc_explain;
3486
3487 vhost->discovery_threads--;
3488 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
Brian King10501e12009-03-20 15:44:39 -05003489 del_timer(&tgt->timer);
Brian King989b8542008-07-22 08:31:47 -05003490
3491 switch (status) {
3492 case IBMVFC_MAD_SUCCESS:
3493 tgt_dbg(tgt, "ADISC succeeded\n");
3494 if (ibmvfc_adisc_needs_plogi(mad, tgt))
Brian King5e471672009-05-28 16:17:32 -05003495 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King989b8542008-07-22 08:31:47 -05003496 break;
3497 case IBMVFC_MAD_DRIVER_FAILED:
3498 break;
3499 case IBMVFC_MAD_FAILED:
3500 default:
Brian King5e471672009-05-28 16:17:32 -05003501 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King989b8542008-07-22 08:31:47 -05003502 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
3503 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
3504 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3505 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
3506 mad->iu.status, mad->iu.error,
3507 ibmvfc_get_fc_type(fc_reason), fc_reason,
3508 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3509 break;
3510 };
3511
3512 kref_put(&tgt->kref, ibmvfc_release_tgt);
3513 ibmvfc_free_event(evt);
3514 wake_up(&vhost->work_wait_q);
3515}
3516
3517/**
3518 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3519 * @evt: ibmvfc event struct
3520 *
3521 **/
3522static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3523{
3524 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3525
3526 memset(mad, 0, sizeof(*mad));
3527 mad->common.version = 1;
3528 mad->common.opcode = IBMVFC_PASSTHRU;
3529 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
3530 mad->cmd_ioba.va = (u64)evt->crq.ioba +
3531 offsetof(struct ibmvfc_passthru_mad, iu);
3532 mad->cmd_ioba.len = sizeof(mad->iu);
3533 mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
3534 mad->iu.rsp_len = sizeof(mad->fc_iu.response);
3535 mad->iu.cmd.va = (u64)evt->crq.ioba +
3536 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3537 offsetof(struct ibmvfc_passthru_fc_iu, payload);
3538 mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
3539 mad->iu.rsp.va = (u64)evt->crq.ioba +
3540 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
3541 offsetof(struct ibmvfc_passthru_fc_iu, response);
3542 mad->iu.rsp.len = sizeof(mad->fc_iu.response);
3543}
3544
3545/**
Brian King10501e12009-03-20 15:44:39 -05003546 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3547 * @evt: ibmvfc event struct
3548 *
3549 * Just cleanup this event struct. Everything else is handled by
3550 * the ADISC completion handler. If the ADISC never actually comes
3551 * back, we still have the timer running on the ADISC event struct
3552 * which will fire and cause the CRQ to get reset.
3553 *
3554 **/
3555static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3556{
3557 struct ibmvfc_host *vhost = evt->vhost;
3558 struct ibmvfc_target *tgt = evt->tgt;
3559
3560 tgt_dbg(tgt, "ADISC cancel complete\n");
3561 vhost->abort_threads--;
3562 ibmvfc_free_event(evt);
3563 kref_put(&tgt->kref, ibmvfc_release_tgt);
3564 wake_up(&vhost->work_wait_q);
3565}
3566
3567/**
3568 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3569 * @tgt: ibmvfc target struct
3570 *
3571 * If an ADISC times out, send a cancel. If the cancel times
3572 * out, reset the CRQ. When the ADISC comes back as cancelled,
3573 * log back into the target.
3574 **/
3575static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
3576{
3577 struct ibmvfc_host *vhost = tgt->vhost;
3578 struct ibmvfc_event *evt;
3579 struct ibmvfc_tmf *tmf;
3580 unsigned long flags;
3581 int rc;
3582
3583 tgt_dbg(tgt, "ADISC timeout\n");
3584 spin_lock_irqsave(vhost->host->host_lock, flags);
3585 if (vhost->abort_threads >= disc_threads ||
3586 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3587 vhost->state != IBMVFC_INITIALIZING ||
3588 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3589 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3590 return;
3591 }
3592
3593 vhost->abort_threads++;
3594 kref_get(&tgt->kref);
3595 evt = ibmvfc_get_event(vhost);
3596 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3597
3598 evt->tgt = tgt;
3599 tmf = &evt->iu.tmf;
3600 memset(tmf, 0, sizeof(*tmf));
3601 tmf->common.version = 1;
3602 tmf->common.opcode = IBMVFC_TMF_MAD;
3603 tmf->common.length = sizeof(*tmf);
3604 tmf->scsi_id = tgt->scsi_id;
3605 tmf->cancel_key = tgt->cancel_key;
3606
3607 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3608
3609 if (rc) {
3610 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3611 vhost->abort_threads--;
3612 kref_put(&tgt->kref, ibmvfc_release_tgt);
3613 __ibmvfc_reset_host(vhost);
3614 } else
3615 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3616 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3617}
3618
3619/**
Brian King989b8542008-07-22 08:31:47 -05003620 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3621 * @tgt: ibmvfc target struct
3622 *
Brian King10501e12009-03-20 15:44:39 -05003623 * When sending an ADISC we end up with two timers running. The
3624 * first timer is the timer in the ibmvfc target struct. If this
3625 * fires, we send a cancel to the target. The second timer is the
3626 * timer on the ibmvfc event for the ADISC, which is longer. If that
3627 * fires, it means the ADISC timed out and our attempt to cancel it
3628 * also failed, so we need to reset the CRQ.
Brian King989b8542008-07-22 08:31:47 -05003629 **/
3630static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3631{
3632 struct ibmvfc_passthru_mad *mad;
3633 struct ibmvfc_host *vhost = tgt->vhost;
3634 struct ibmvfc_event *evt;
3635
3636 if (vhost->discovery_threads >= disc_threads)
3637 return;
3638
3639 kref_get(&tgt->kref);
3640 evt = ibmvfc_get_event(vhost);
3641 vhost->discovery_threads++;
3642 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3643 evt->tgt = tgt;
3644
3645 ibmvfc_init_passthru(evt);
3646 mad = &evt->iu.passthru;
3647 mad->iu.flags = IBMVFC_FC_ELS;
3648 mad->iu.scsi_id = tgt->scsi_id;
Brian King10501e12009-03-20 15:44:39 -05003649 mad->iu.cancel_key = tgt->cancel_key;
Brian King989b8542008-07-22 08:31:47 -05003650
3651 mad->fc_iu.payload[0] = IBMVFC_ADISC;
3652 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3653 sizeof(vhost->login_buf->resp.port_name));
3654 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3655 sizeof(vhost->login_buf->resp.node_name));
3656 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
3657
Brian King10501e12009-03-20 15:44:39 -05003658 if (timer_pending(&tgt->timer))
3659 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3660 else {
3661 tgt->timer.data = (unsigned long) tgt;
3662 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
3663 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
3664 add_timer(&tgt->timer);
3665 }
3666
Brian King989b8542008-07-22 08:31:47 -05003667 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
Brian King10501e12009-03-20 15:44:39 -05003668 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
Brian King989b8542008-07-22 08:31:47 -05003669 vhost->discovery_threads--;
Brian King10501e12009-03-20 15:44:39 -05003670 del_timer(&tgt->timer);
Brian King989b8542008-07-22 08:31:47 -05003671 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3672 kref_put(&tgt->kref, ibmvfc_release_tgt);
3673 } else
3674 tgt_dbg(tgt, "Sent ADISC\n");
3675}
3676
3677/**
Brian King072b91f2008-07-01 13:14:30 -05003678 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3679 * @evt: ibmvfc event struct
3680 *
3681 **/
3682static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3683{
3684 struct ibmvfc_target *tgt = evt->tgt;
3685 struct ibmvfc_host *vhost = evt->vhost;
3686 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
3687 u32 status = rsp->common.status;
Brian King7d0e4622009-05-28 16:17:26 -05003688 int level = IBMVFC_DEFAULT_LOG_LEVEL;
Brian King072b91f2008-07-01 13:14:30 -05003689
3690 vhost->discovery_threads--;
3691 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3692 switch (status) {
3693 case IBMVFC_MAD_SUCCESS:
3694 tgt_dbg(tgt, "Query Target succeeded\n");
3695 tgt->new_scsi_id = rsp->scsi_id;
3696 if (rsp->scsi_id != tgt->scsi_id)
3697 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
Brian King989b8542008-07-22 08:31:47 -05003698 else
3699 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
Brian King072b91f2008-07-01 13:14:30 -05003700 break;
3701 case IBMVFC_MAD_DRIVER_FAILED:
3702 break;
3703 case IBMVFC_MAD_CRQ_ERROR:
3704 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3705 break;
3706 case IBMVFC_MAD_FAILED:
3707 default:
Brian King072b91f2008-07-01 13:14:30 -05003708 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3709 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3710 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG)
3711 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3712 else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
Brian King7d0e4622009-05-28 16:17:26 -05003713 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
Brian King10e79492008-10-29 08:46:45 -05003714 else
3715 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
Brian King7d0e4622009-05-28 16:17:26 -05003716
3717 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3718 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error,
3719 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type,
3720 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status);
Brian King072b91f2008-07-01 13:14:30 -05003721 break;
3722 };
3723
3724 kref_put(&tgt->kref, ibmvfc_release_tgt);
3725 ibmvfc_free_event(evt);
3726 wake_up(&vhost->work_wait_q);
3727}
3728
3729/**
3730 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3731 * @tgt: ibmvfc target struct
3732 *
3733 **/
3734static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3735{
3736 struct ibmvfc_query_tgt *query_tgt;
3737 struct ibmvfc_host *vhost = tgt->vhost;
3738 struct ibmvfc_event *evt;
3739
3740 if (vhost->discovery_threads >= disc_threads)
3741 return;
3742
3743 kref_get(&tgt->kref);
3744 evt = ibmvfc_get_event(vhost);
3745 vhost->discovery_threads++;
3746 evt->tgt = tgt;
3747 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3748 query_tgt = &evt->iu.query_tgt;
3749 memset(query_tgt, 0, sizeof(*query_tgt));
3750 query_tgt->common.version = 1;
3751 query_tgt->common.opcode = IBMVFC_QUERY_TARGET;
3752 query_tgt->common.length = sizeof(*query_tgt);
3753 query_tgt->wwpn = tgt->ids.port_name;
3754
3755 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3756 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3757 vhost->discovery_threads--;
3758 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3759 kref_put(&tgt->kref, ibmvfc_release_tgt);
3760 } else
3761 tgt_dbg(tgt, "Sent Query Target\n");
3762}
3763
3764/**
3765 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3766 * @vhost: ibmvfc host struct
3767 * @scsi_id: SCSI ID to allocate target for
3768 *
3769 * Returns:
3770 * 0 on success / other on failure
3771 **/
3772static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3773{
3774 struct ibmvfc_target *tgt;
3775 unsigned long flags;
3776
3777 spin_lock_irqsave(vhost->host->host_lock, flags);
3778 list_for_each_entry(tgt, &vhost->targets, queue) {
3779 if (tgt->scsi_id == scsi_id) {
3780 if (tgt->need_login)
3781 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3782 goto unlock_out;
3783 }
3784 }
3785 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3786
Brian King7270b9b2009-05-28 16:17:24 -05003787 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
Brian King072b91f2008-07-01 13:14:30 -05003788 if (!tgt) {
Stephen Rothwell775a42e2009-01-06 14:59:00 +00003789 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
Brian King072b91f2008-07-01 13:14:30 -05003790 scsi_id);
3791 return -ENOMEM;
3792 }
3793
Brian King0883e3b2009-02-04 16:13:12 -06003794 memset(tgt, 0, sizeof(*tgt));
Brian King072b91f2008-07-01 13:14:30 -05003795 tgt->scsi_id = scsi_id;
3796 tgt->new_scsi_id = scsi_id;
3797 tgt->vhost = vhost;
3798 tgt->need_login = 1;
Brian King10501e12009-03-20 15:44:39 -05003799 tgt->cancel_key = vhost->task_set++;
3800 init_timer(&tgt->timer);
Brian King072b91f2008-07-01 13:14:30 -05003801 kref_init(&tgt->kref);
3802 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3803 spin_lock_irqsave(vhost->host->host_lock, flags);
3804 list_add_tail(&tgt->queue, &vhost->targets);
3805
3806unlock_out:
3807 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3808 return 0;
3809}
3810
3811/**
3812 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3813 * @vhost: ibmvfc host struct
3814 *
3815 * Returns:
3816 * 0 on success / other on failure
3817 **/
3818static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3819{
3820 int i, rc;
3821
3822 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3823 rc = ibmvfc_alloc_target(vhost,
3824 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK);
3825
3826 return rc;
3827}
3828
3829/**
3830 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3831 * @evt: ibmvfc event struct
3832 *
3833 **/
3834static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3835{
3836 struct ibmvfc_host *vhost = evt->vhost;
3837 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
3838 u32 mad_status = rsp->common.status;
Brian King7d0e4622009-05-28 16:17:26 -05003839 int level = IBMVFC_DEFAULT_LOG_LEVEL;
Brian King072b91f2008-07-01 13:14:30 -05003840
3841 switch (mad_status) {
3842 case IBMVFC_MAD_SUCCESS:
3843 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
3844 vhost->num_targets = rsp->num_written;
3845 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3846 break;
3847 case IBMVFC_MAD_FAILED:
Brian King7d0e4622009-05-28 16:17:26 -05003848 level += ibmvfc_retry_host_init(vhost);
3849 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
3850 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
Brian King072b91f2008-07-01 13:14:30 -05003851 break;
3852 case IBMVFC_MAD_DRIVER_FAILED:
3853 break;
3854 default:
3855 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3856 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3857 break;
3858 }
3859
3860 ibmvfc_free_event(evt);
3861 wake_up(&vhost->work_wait_q);
3862}
3863
3864/**
3865 * ibmvfc_discover_targets - Send Discover Targets MAD
3866 * @vhost: ibmvfc host struct
3867 *
3868 **/
3869static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3870{
3871 struct ibmvfc_discover_targets *mad;
3872 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3873
3874 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3875 mad = &evt->iu.discover_targets;
3876 memset(mad, 0, sizeof(*mad));
3877 mad->common.version = 1;
3878 mad->common.opcode = IBMVFC_DISC_TARGETS;
3879 mad->common.length = sizeof(*mad);
3880 mad->bufflen = vhost->disc_buf_sz;
3881 mad->buffer.va = vhost->disc_buf_dma;
3882 mad->buffer.len = vhost->disc_buf_sz;
3883 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3884
3885 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3886 ibmvfc_dbg(vhost, "Sent discover targets\n");
3887 else
3888 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3889}
3890
3891/**
3892 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3893 * @evt: ibmvfc event struct
3894 *
3895 **/
3896static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
3897{
3898 struct ibmvfc_host *vhost = evt->vhost;
3899 u32 mad_status = evt->xfer_iu->npiv_login.common.status;
3900 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
3901 unsigned int npiv_max_sectors;
Brian King7d0e4622009-05-28 16:17:26 -05003902 int level = IBMVFC_DEFAULT_LOG_LEVEL;
Brian King072b91f2008-07-01 13:14:30 -05003903
3904 switch (mad_status) {
3905 case IBMVFC_MAD_SUCCESS:
3906 ibmvfc_free_event(evt);
3907 break;
3908 case IBMVFC_MAD_FAILED:
Brian King072b91f2008-07-01 13:14:30 -05003909 if (ibmvfc_retry_cmd(rsp->status, rsp->error))
Brian King7d0e4622009-05-28 16:17:26 -05003910 level += ibmvfc_retry_host_init(vhost);
Brian King072b91f2008-07-01 13:14:30 -05003911 else
3912 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
Brian King7d0e4622009-05-28 16:17:26 -05003913 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
3914 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
Brian King072b91f2008-07-01 13:14:30 -05003915 ibmvfc_free_event(evt);
3916 return;
3917 case IBMVFC_MAD_CRQ_ERROR:
3918 ibmvfc_retry_host_init(vhost);
3919 case IBMVFC_MAD_DRIVER_FAILED:
3920 ibmvfc_free_event(evt);
3921 return;
3922 default:
3923 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
3924 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3925 ibmvfc_free_event(evt);
3926 return;
3927 }
3928
3929 vhost->client_migrated = 0;
3930
3931 if (!(rsp->flags & IBMVFC_NATIVE_FC)) {
3932 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
3933 rsp->flags);
3934 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3935 wake_up(&vhost->work_wait_q);
3936 return;
3937 }
3938
3939 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) {
3940 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
3941 rsp->max_cmds);
3942 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3943 wake_up(&vhost->work_wait_q);
3944 return;
3945 }
3946
Brian King79111d02009-05-28 16:17:29 -05003947 vhost->logged_in = 1;
Brian King072b91f2008-07-01 13:14:30 -05003948 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS);
3949 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
3950 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
3951 rsp->drc_name, npiv_max_sectors);
3952
3953 fc_host_fabric_name(vhost->host) = rsp->node_name;
3954 fc_host_node_name(vhost->host) = rsp->node_name;
3955 fc_host_port_name(vhost->host) = rsp->port_name;
3956 fc_host_port_id(vhost->host) = rsp->scsi_id;
3957 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
3958 fc_host_supported_classes(vhost->host) = 0;
3959 if (rsp->service_parms.class1_parms[0] & 0x80000000)
3960 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
3961 if (rsp->service_parms.class2_parms[0] & 0x80000000)
3962 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
3963 if (rsp->service_parms.class3_parms[0] & 0x80000000)
3964 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
3965 fc_host_maxframe_size(vhost->host) =
3966 rsp->service_parms.common.bb_rcv_sz & 0x0fff;
3967
3968 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ;
3969 vhost->host->max_sectors = npiv_max_sectors;
3970 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
3971 wake_up(&vhost->work_wait_q);
3972}
3973
3974/**
3975 * ibmvfc_npiv_login - Sends NPIV login
3976 * @vhost: ibmvfc host struct
3977 *
3978 **/
3979static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
3980{
3981 struct ibmvfc_npiv_login_mad *mad;
3982 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3983
3984 ibmvfc_gather_partition_info(vhost);
3985 ibmvfc_set_login_info(vhost);
3986 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
3987
3988 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
3989 mad = &evt->iu.npiv_login;
3990 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
3991 mad->common.version = 1;
3992 mad->common.opcode = IBMVFC_NPIV_LOGIN;
3993 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad);
3994 mad->buffer.va = vhost->login_buf_dma;
3995 mad->buffer.len = sizeof(*vhost->login_buf);
3996
Brian King072b91f2008-07-01 13:14:30 -05003997 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3998
3999 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4000 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4001 else
4002 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4003};
4004
4005/**
Brian King79111d02009-05-28 16:17:29 -05004006 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4007 * @vhost: ibmvfc host struct
4008 *
4009 **/
4010static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4011{
4012 struct ibmvfc_host *vhost = evt->vhost;
4013 u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
4014
4015 ibmvfc_free_event(evt);
4016
4017 switch (mad_status) {
4018 case IBMVFC_MAD_SUCCESS:
4019 if (list_empty(&vhost->sent) &&
4020 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
Brian King861890c2009-10-19 15:07:49 -05004021 ibmvfc_init_host(vhost);
Brian King79111d02009-05-28 16:17:29 -05004022 return;
4023 }
4024 break;
4025 case IBMVFC_MAD_FAILED:
4026 case IBMVFC_MAD_NOT_SUPPORTED:
4027 case IBMVFC_MAD_CRQ_ERROR:
4028 case IBMVFC_MAD_DRIVER_FAILED:
4029 default:
4030 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4031 break;
4032 }
4033
4034 ibmvfc_hard_reset_host(vhost);
4035}
4036
4037/**
4038 * ibmvfc_npiv_logout - Issue an NPIV Logout
4039 * @vhost: ibmvfc host struct
4040 *
4041 **/
4042static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4043{
4044 struct ibmvfc_npiv_logout_mad *mad;
4045 struct ibmvfc_event *evt;
4046
4047 evt = ibmvfc_get_event(vhost);
4048 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4049
4050 mad = &evt->iu.npiv_logout;
4051 memset(mad, 0, sizeof(*mad));
4052 mad->common.version = 1;
4053 mad->common.opcode = IBMVFC_NPIV_LOGOUT;
4054 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
4055
4056 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4057
4058 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4059 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4060 else
4061 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4062}
4063
4064/**
Brian King072b91f2008-07-01 13:14:30 -05004065 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4066 * @vhost: ibmvfc host struct
4067 *
4068 * Returns:
4069 * 1 if work to do / 0 if not
4070 **/
4071static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4072{
4073 struct ibmvfc_target *tgt;
4074
4075 list_for_each_entry(tgt, &vhost->targets, queue) {
4076 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4077 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4078 return 1;
4079 }
4080
4081 return 0;
4082}
4083
4084/**
4085 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4086 * @vhost: ibmvfc host struct
4087 *
4088 * Returns:
4089 * 1 if work to do / 0 if not
4090 **/
4091static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4092{
4093 struct ibmvfc_target *tgt;
4094
4095 if (kthread_should_stop())
4096 return 1;
4097 switch (vhost->action) {
4098 case IBMVFC_HOST_ACTION_NONE:
4099 case IBMVFC_HOST_ACTION_INIT_WAIT:
Brian King79111d02009-05-28 16:17:29 -05004100 case IBMVFC_HOST_ACTION_LOGO_WAIT:
Brian King072b91f2008-07-01 13:14:30 -05004101 return 0;
4102 case IBMVFC_HOST_ACTION_TGT_INIT:
4103 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4104 if (vhost->discovery_threads == disc_threads)
4105 return 0;
4106 list_for_each_entry(tgt, &vhost->targets, queue)
4107 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4108 return 1;
4109 list_for_each_entry(tgt, &vhost->targets, queue)
4110 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4111 return 0;
4112 return 1;
Brian King79111d02009-05-28 16:17:29 -05004113 case IBMVFC_HOST_ACTION_LOGO:
Brian King072b91f2008-07-01 13:14:30 -05004114 case IBMVFC_HOST_ACTION_INIT:
4115 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
Brian King072b91f2008-07-01 13:14:30 -05004116 case IBMVFC_HOST_ACTION_TGT_DEL:
Brian King10e79492008-10-29 08:46:45 -05004117 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -05004118 case IBMVFC_HOST_ACTION_QUERY:
4119 default:
4120 break;
4121 };
4122
4123 return 1;
4124}
4125
4126/**
4127 * ibmvfc_work_to_do - Is there task level work to do?
4128 * @vhost: ibmvfc host struct
4129 *
4130 * Returns:
4131 * 1 if work to do / 0 if not
4132 **/
4133static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4134{
4135 unsigned long flags;
4136 int rc;
4137
4138 spin_lock_irqsave(vhost->host->host_lock, flags);
4139 rc = __ibmvfc_work_to_do(vhost);
4140 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4141 return rc;
4142}
4143
4144/**
4145 * ibmvfc_log_ae - Log async events if necessary
4146 * @vhost: ibmvfc host struct
4147 * @events: events to log
4148 *
4149 **/
4150static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4151{
4152 if (events & IBMVFC_AE_RSCN)
4153 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4154 if ((events & IBMVFC_AE_LINKDOWN) &&
4155 vhost->state >= IBMVFC_HALTED)
4156 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4157 if ((events & IBMVFC_AE_LINKUP) &&
4158 vhost->state == IBMVFC_INITIALIZING)
4159 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4160}
4161
4162/**
4163 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4164 * @tgt: ibmvfc target struct
4165 *
4166 **/
4167static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4168{
4169 struct ibmvfc_host *vhost = tgt->vhost;
Brian King43c8da92009-05-28 16:17:28 -05004170 struct fc_rport *rport;
Brian King072b91f2008-07-01 13:14:30 -05004171 unsigned long flags;
4172
4173 tgt_dbg(tgt, "Adding rport\n");
4174 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4175 spin_lock_irqsave(vhost->host->host_lock, flags);
Brian King43c8da92009-05-28 16:17:28 -05004176
4177 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4178 tgt_dbg(tgt, "Deleting rport\n");
4179 list_del(&tgt->queue);
4180 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4181 fc_remote_port_delete(rport);
4182 del_timer_sync(&tgt->timer);
4183 kref_put(&tgt->kref, ibmvfc_release_tgt);
4184 return;
4185 }
4186
Brian King072b91f2008-07-01 13:14:30 -05004187 if (rport) {
4188 tgt_dbg(tgt, "rport add succeeded\n");
Brian King43c8da92009-05-28 16:17:28 -05004189 tgt->rport = rport;
Brian King072b91f2008-07-01 13:14:30 -05004190 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff;
4191 rport->supported_classes = 0;
Brian King52d7e862008-07-22 08:31:46 -05004192 tgt->target_id = rport->scsi_target_id;
Brian King072b91f2008-07-01 13:14:30 -05004193 if (tgt->service_parms.class1_parms[0] & 0x80000000)
4194 rport->supported_classes |= FC_COS_CLASS1;
4195 if (tgt->service_parms.class2_parms[0] & 0x80000000)
4196 rport->supported_classes |= FC_COS_CLASS2;
4197 if (tgt->service_parms.class3_parms[0] & 0x80000000)
4198 rport->supported_classes |= FC_COS_CLASS3;
Brian Kingd31429e2009-10-19 15:07:54 -05004199 if (rport->rqst_q)
Martin K. Petersen8a783622010-02-26 00:20:39 -05004200 blk_queue_max_segments(rport->rqst_q, 1);
Brian King072b91f2008-07-01 13:14:30 -05004201 } else
4202 tgt_dbg(tgt, "rport add failed\n");
4203 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4204}
4205
4206/**
4207 * ibmvfc_do_work - Do task level work
4208 * @vhost: ibmvfc host struct
4209 *
4210 **/
4211static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4212{
4213 struct ibmvfc_target *tgt;
4214 unsigned long flags;
4215 struct fc_rport *rport;
4216
4217 ibmvfc_log_ae(vhost, vhost->events_to_log);
4218 spin_lock_irqsave(vhost->host->host_lock, flags);
4219 vhost->events_to_log = 0;
4220 switch (vhost->action) {
4221 case IBMVFC_HOST_ACTION_NONE:
Brian King79111d02009-05-28 16:17:29 -05004222 case IBMVFC_HOST_ACTION_LOGO_WAIT:
Brian King072b91f2008-07-01 13:14:30 -05004223 case IBMVFC_HOST_ACTION_INIT_WAIT:
4224 break;
Brian King79111d02009-05-28 16:17:29 -05004225 case IBMVFC_HOST_ACTION_LOGO:
4226 vhost->job_step(vhost);
4227 break;
Brian King072b91f2008-07-01 13:14:30 -05004228 case IBMVFC_HOST_ACTION_INIT:
4229 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
Brian King1c41fa822008-12-03 11:02:54 -06004230 if (vhost->delay_init) {
4231 vhost->delay_init = 0;
4232 spin_unlock_irqrestore(vhost->host->host_lock, flags);
Brian Kingd2131b32008-12-18 09:26:51 -06004233 ssleep(15);
Brian King1c41fa822008-12-03 11:02:54 -06004234 return;
4235 } else
4236 vhost->job_step(vhost);
Brian King072b91f2008-07-01 13:14:30 -05004237 break;
4238 case IBMVFC_HOST_ACTION_QUERY:
4239 list_for_each_entry(tgt, &vhost->targets, queue)
4240 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4241 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4242 break;
4243 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4244 list_for_each_entry(tgt, &vhost->targets, queue) {
4245 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4246 tgt->job_step(tgt);
4247 break;
4248 }
4249 }
4250
4251 if (!ibmvfc_dev_init_to_do(vhost))
4252 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4253 break;
4254 case IBMVFC_HOST_ACTION_TGT_DEL:
Brian King10e79492008-10-29 08:46:45 -05004255 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
Brian King072b91f2008-07-01 13:14:30 -05004256 list_for_each_entry(tgt, &vhost->targets, queue) {
4257 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4258 tgt_dbg(tgt, "Deleting rport\n");
4259 rport = tgt->rport;
4260 tgt->rport = NULL;
4261 list_del(&tgt->queue);
4262 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4263 if (rport)
4264 fc_remote_port_delete(rport);
Brian King10501e12009-03-20 15:44:39 -05004265 del_timer_sync(&tgt->timer);
Brian King072b91f2008-07-01 13:14:30 -05004266 kref_put(&tgt->kref, ibmvfc_release_tgt);
4267 return;
4268 }
4269 }
4270
4271 if (vhost->state == IBMVFC_INITIALIZING) {
Brian King10e79492008-10-29 08:46:45 -05004272 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
Brian King43c8da92009-05-28 16:17:28 -05004273 if (vhost->reinit) {
4274 vhost->reinit = 0;
4275 scsi_block_requests(vhost->host);
4276 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4277 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4278 } else {
4279 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4280 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4281 wake_up(&vhost->init_wait_q);
4282 schedule_work(&vhost->rport_add_work_q);
4283 vhost->init_retries = 0;
4284 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4285 scsi_unblock_requests(vhost->host);
4286 }
4287
Brian King10e79492008-10-29 08:46:45 -05004288 return;
4289 } else {
4290 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4291 vhost->job_step = ibmvfc_discover_targets;
4292 }
Brian King072b91f2008-07-01 13:14:30 -05004293 } else {
4294 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4295 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4296 scsi_unblock_requests(vhost->host);
4297 wake_up(&vhost->init_wait_q);
4298 return;
4299 }
4300 break;
4301 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4302 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4303 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4304 ibmvfc_alloc_targets(vhost);
4305 spin_lock_irqsave(vhost->host->host_lock, flags);
4306 break;
4307 case IBMVFC_HOST_ACTION_TGT_INIT:
4308 list_for_each_entry(tgt, &vhost->targets, queue) {
4309 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4310 tgt->job_step(tgt);
4311 break;
4312 }
4313 }
4314
Brian King10e79492008-10-29 08:46:45 -05004315 if (!ibmvfc_dev_init_to_do(vhost))
4316 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
Brian King072b91f2008-07-01 13:14:30 -05004317 break;
Brian King072b91f2008-07-01 13:14:30 -05004318 default:
4319 break;
4320 };
4321
4322 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4323}
4324
4325/**
4326 * ibmvfc_work - Do task level work
4327 * @data: ibmvfc host struct
4328 *
4329 * Returns:
4330 * zero
4331 **/
4332static int ibmvfc_work(void *data)
4333{
4334 struct ibmvfc_host *vhost = data;
4335 int rc;
4336
4337 set_user_nice(current, -20);
4338
4339 while (1) {
4340 rc = wait_event_interruptible(vhost->work_wait_q,
4341 ibmvfc_work_to_do(vhost));
4342
4343 BUG_ON(rc);
4344
4345 if (kthread_should_stop())
4346 break;
4347
4348 ibmvfc_do_work(vhost);
4349 }
4350
4351 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4352 return 0;
4353}
4354
4355/**
4356 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4357 * @vhost: ibmvfc host struct
4358 *
4359 * Allocates a page for messages, maps it for dma, and registers
4360 * the crq with the hypervisor.
4361 *
4362 * Return value:
4363 * zero on success / other on failure
4364 **/
4365static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4366{
4367 int rc, retrc = -ENOMEM;
4368 struct device *dev = vhost->dev;
4369 struct vio_dev *vdev = to_vio_dev(dev);
4370 struct ibmvfc_crq_queue *crq = &vhost->crq;
4371
4372 ENTER;
4373 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4374
4375 if (!crq->msgs)
4376 return -ENOMEM;
4377
4378 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4379 crq->msg_token = dma_map_single(dev, crq->msgs,
4380 PAGE_SIZE, DMA_BIDIRECTIONAL);
4381
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07004382 if (dma_mapping_error(dev, crq->msg_token))
Brian King072b91f2008-07-01 13:14:30 -05004383 goto map_failed;
4384
4385 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4386 crq->msg_token, PAGE_SIZE);
4387
4388 if (rc == H_RESOURCE)
4389 /* maybe kexecing and resource is busy. try a reset */
4390 retrc = rc = ibmvfc_reset_crq(vhost);
4391
4392 if (rc == H_CLOSED)
4393 dev_warn(dev, "Partner adapter not ready\n");
4394 else if (rc) {
4395 dev_warn(dev, "Error %d opening adapter\n", rc);
4396 goto reg_crq_failed;
4397 }
4398
4399 retrc = 0;
4400
Brian King039a0892009-03-20 15:44:35 -05004401 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4402
Brian King072b91f2008-07-01 13:14:30 -05004403 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4404 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4405 goto req_irq_failed;
4406 }
4407
4408 if ((rc = vio_enable_interrupts(vdev))) {
4409 dev_err(dev, "Error %d enabling interrupts\n", rc);
4410 goto req_irq_failed;
4411 }
4412
4413 crq->cur = 0;
4414 LEAVE;
4415 return retrc;
4416
4417req_irq_failed:
Brian King039a0892009-03-20 15:44:35 -05004418 tasklet_kill(&vhost->tasklet);
Brian King072b91f2008-07-01 13:14:30 -05004419 do {
4420 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4421 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4422reg_crq_failed:
4423 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4424map_failed:
4425 free_page((unsigned long)crq->msgs);
4426 return retrc;
4427}
4428
4429/**
4430 * ibmvfc_free_mem - Free memory for vhost
4431 * @vhost: ibmvfc host struct
4432 *
4433 * Return value:
4434 * none
4435 **/
4436static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4437{
4438 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4439
4440 ENTER;
4441 mempool_destroy(vhost->tgt_pool);
4442 kfree(vhost->trace);
4443 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4444 vhost->disc_buf_dma);
4445 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4446 vhost->login_buf, vhost->login_buf_dma);
4447 dma_pool_destroy(vhost->sg_pool);
4448 dma_unmap_single(vhost->dev, async_q->msg_token,
4449 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4450 free_page((unsigned long)async_q->msgs);
4451 LEAVE;
4452}
4453
4454/**
4455 * ibmvfc_alloc_mem - Allocate memory for vhost
4456 * @vhost: ibmvfc host struct
4457 *
4458 * Return value:
4459 * 0 on success / non-zero on failure
4460 **/
4461static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4462{
4463 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4464 struct device *dev = vhost->dev;
4465
4466 ENTER;
4467 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4468 if (!async_q->msgs) {
4469 dev_err(dev, "Couldn't allocate async queue.\n");
4470 goto nomem;
4471 }
4472
4473 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4474 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4475 async_q->size * sizeof(*async_q->msgs),
4476 DMA_BIDIRECTIONAL);
4477
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07004478 if (dma_mapping_error(dev, async_q->msg_token)) {
Brian King072b91f2008-07-01 13:14:30 -05004479 dev_err(dev, "Failed to map async queue\n");
4480 goto free_async_crq;
4481 }
4482
4483 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4484 SG_ALL * sizeof(struct srp_direct_buf),
4485 sizeof(struct srp_direct_buf), 0);
4486
4487 if (!vhost->sg_pool) {
4488 dev_err(dev, "Failed to allocate sg pool\n");
4489 goto unmap_async_crq;
4490 }
4491
4492 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4493 &vhost->login_buf_dma, GFP_KERNEL);
4494
4495 if (!vhost->login_buf) {
4496 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4497 goto free_sg_pool;
4498 }
4499
4500 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4501 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4502 &vhost->disc_buf_dma, GFP_KERNEL);
4503
4504 if (!vhost->disc_buf) {
4505 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4506 goto free_login_buffer;
4507 }
4508
4509 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4510 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4511
4512 if (!vhost->trace)
4513 goto free_disc_buffer;
4514
Sage Weild6886692009-08-03 13:54:47 -07004515 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
Brian King072b91f2008-07-01 13:14:30 -05004516 sizeof(struct ibmvfc_target));
4517
4518 if (!vhost->tgt_pool) {
4519 dev_err(dev, "Couldn't allocate target memory pool\n");
4520 goto free_trace;
4521 }
4522
4523 LEAVE;
4524 return 0;
4525
4526free_trace:
4527 kfree(vhost->trace);
4528free_disc_buffer:
4529 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4530 vhost->disc_buf_dma);
4531free_login_buffer:
4532 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4533 vhost->login_buf, vhost->login_buf_dma);
4534free_sg_pool:
4535 dma_pool_destroy(vhost->sg_pool);
4536unmap_async_crq:
4537 dma_unmap_single(dev, async_q->msg_token,
4538 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4539free_async_crq:
4540 free_page((unsigned long)async_q->msgs);
4541nomem:
4542 LEAVE;
4543 return -ENOMEM;
4544}
4545
4546/**
Brian King43c8da92009-05-28 16:17:28 -05004547 * ibmvfc_rport_add_thread - Worker thread for rport adds
4548 * @work: work struct
4549 *
4550 **/
4551static void ibmvfc_rport_add_thread(struct work_struct *work)
4552{
4553 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4554 rport_add_work_q);
4555 struct ibmvfc_target *tgt;
4556 struct fc_rport *rport;
4557 unsigned long flags;
4558 int did_work;
4559
4560 ENTER;
4561 spin_lock_irqsave(vhost->host->host_lock, flags);
4562 do {
4563 did_work = 0;
4564 if (vhost->state != IBMVFC_ACTIVE)
4565 break;
4566
4567 list_for_each_entry(tgt, &vhost->targets, queue) {
4568 if (tgt->add_rport) {
4569 did_work = 1;
4570 tgt->add_rport = 0;
4571 kref_get(&tgt->kref);
4572 rport = tgt->rport;
4573 if (!rport) {
4574 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4575 ibmvfc_tgt_add_rport(tgt);
4576 } else if (get_device(&rport->dev)) {
4577 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4578 tgt_dbg(tgt, "Setting rport roles\n");
4579 fc_remote_port_rolechg(rport, tgt->ids.roles);
4580 put_device(&rport->dev);
4581 }
4582
4583 kref_put(&tgt->kref, ibmvfc_release_tgt);
4584 spin_lock_irqsave(vhost->host->host_lock, flags);
4585 break;
4586 }
4587 }
4588 } while(did_work);
4589
4590 if (vhost->state == IBMVFC_ACTIVE)
4591 vhost->scan_complete = 1;
4592 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4593 LEAVE;
4594}
4595
4596/**
Brian King072b91f2008-07-01 13:14:30 -05004597 * ibmvfc_probe - Adapter hot plug add entry point
4598 * @vdev: vio device struct
4599 * @id: vio device id struct
4600 *
4601 * Return value:
4602 * 0 on success / non-zero on failure
4603 **/
4604static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4605{
4606 struct ibmvfc_host *vhost;
4607 struct Scsi_Host *shost;
4608 struct device *dev = &vdev->dev;
4609 int rc = -ENOMEM;
4610
4611 ENTER;
4612 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4613 if (!shost) {
4614 dev_err(dev, "Couldn't allocate host data\n");
4615 goto out;
4616 }
4617
4618 shost->transportt = ibmvfc_transport_template;
4619 shost->can_queue = max_requests;
4620 shost->max_lun = max_lun;
4621 shost->max_id = max_targets;
4622 shost->max_sectors = IBMVFC_MAX_SECTORS;
4623 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4624 shost->unique_id = shost->host_no;
4625
4626 vhost = shost_priv(shost);
4627 INIT_LIST_HEAD(&vhost->sent);
4628 INIT_LIST_HEAD(&vhost->free);
4629 INIT_LIST_HEAD(&vhost->targets);
4630 sprintf(vhost->name, IBMVFC_NAME);
4631 vhost->host = shost;
4632 vhost->dev = dev;
4633 vhost->partition_number = -1;
4634 vhost->log_level = log_level;
Brian King10501e12009-03-20 15:44:39 -05004635 vhost->task_set = 1;
Brian King072b91f2008-07-01 13:14:30 -05004636 strcpy(vhost->partition_name, "UNKNOWN");
4637 init_waitqueue_head(&vhost->work_wait_q);
4638 init_waitqueue_head(&vhost->init_wait_q);
Brian King43c8da92009-05-28 16:17:28 -05004639 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
Brian Kingd31429e2009-10-19 15:07:54 -05004640 mutex_init(&vhost->passthru_mutex);
Brian King072b91f2008-07-01 13:14:30 -05004641
4642 if ((rc = ibmvfc_alloc_mem(vhost)))
4643 goto free_scsi_host;
4644
4645 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4646 shost->host_no);
4647
4648 if (IS_ERR(vhost->work_thread)) {
4649 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4650 PTR_ERR(vhost->work_thread));
4651 goto free_host_mem;
4652 }
4653
4654 if ((rc = ibmvfc_init_crq(vhost))) {
4655 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4656 goto kill_kthread;
4657 }
4658
4659 if ((rc = ibmvfc_init_event_pool(vhost))) {
4660 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4661 goto release_crq;
4662 }
4663
4664 if ((rc = scsi_add_host(shost, dev)))
4665 goto release_event_pool;
4666
4667 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4668 &ibmvfc_trace_attr))) {
4669 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4670 goto remove_shost;
4671 }
4672
Brian Kingd31429e2009-10-19 15:07:54 -05004673 if (shost_to_fc_host(shost)->rqst_q)
Martin K. Petersen8a783622010-02-26 00:20:39 -05004674 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
Brian King072b91f2008-07-01 13:14:30 -05004675 dev_set_drvdata(dev, vhost);
4676 spin_lock(&ibmvfc_driver_lock);
4677 list_add_tail(&vhost->queue, &ibmvfc_head);
4678 spin_unlock(&ibmvfc_driver_lock);
4679
4680 ibmvfc_send_crq_init(vhost);
4681 scsi_scan_host(shost);
4682 return 0;
4683
4684remove_shost:
4685 scsi_remove_host(shost);
4686release_event_pool:
4687 ibmvfc_free_event_pool(vhost);
4688release_crq:
4689 ibmvfc_release_crq_queue(vhost);
4690kill_kthread:
4691 kthread_stop(vhost->work_thread);
4692free_host_mem:
4693 ibmvfc_free_mem(vhost);
4694free_scsi_host:
4695 scsi_host_put(shost);
4696out:
4697 LEAVE;
4698 return rc;
4699}
4700
4701/**
4702 * ibmvfc_remove - Adapter hot plug remove entry point
4703 * @vdev: vio device struct
4704 *
4705 * Return value:
4706 * 0
4707 **/
4708static int ibmvfc_remove(struct vio_dev *vdev)
4709{
4710 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4711 unsigned long flags;
4712
4713 ENTER;
4714 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
Brian King70431102009-10-19 15:07:48 -05004715
4716 spin_lock_irqsave(vhost->host->host_lock, flags);
Brian King2d0da2a2008-07-22 08:31:42 -05004717 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
Brian King70431102009-10-19 15:07:48 -05004718 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4719
Brian King2d0da2a2008-07-22 08:31:42 -05004720 ibmvfc_wait_while_resetting(vhost);
4721 ibmvfc_release_crq_queue(vhost);
Brian King072b91f2008-07-01 13:14:30 -05004722 kthread_stop(vhost->work_thread);
4723 fc_remove_host(vhost->host);
4724 scsi_remove_host(vhost->host);
Brian King072b91f2008-07-01 13:14:30 -05004725
4726 spin_lock_irqsave(vhost->host->host_lock, flags);
4727 ibmvfc_purge_requests(vhost, DID_ERROR);
4728 ibmvfc_free_event_pool(vhost);
4729 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4730
4731 ibmvfc_free_mem(vhost);
4732 spin_lock(&ibmvfc_driver_lock);
4733 list_del(&vhost->queue);
4734 spin_unlock(&ibmvfc_driver_lock);
4735 scsi_host_put(vhost->host);
4736 LEAVE;
4737 return 0;
4738}
4739
Brian King39c1ffe2008-07-24 04:35:48 +10004740/**
Brian Kingb0f4d4c2010-02-21 10:37:58 -06004741 * ibmvfc_resume - Resume from suspend
4742 * @dev: device struct
4743 *
4744 * We may have lost an interrupt across suspend/resume, so kick the
4745 * interrupt handler
4746 *
4747 */
4748static int ibmvfc_resume(struct device *dev)
4749{
4750 unsigned long flags;
4751 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4752 struct vio_dev *vdev = to_vio_dev(dev);
4753
4754 spin_lock_irqsave(vhost->host->host_lock, flags);
4755 vio_disable_interrupts(vdev);
4756 tasklet_schedule(&vhost->tasklet);
4757 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4758 return 0;
4759}
4760
4761/**
Brian King39c1ffe2008-07-24 04:35:48 +10004762 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4763 * @vdev: vio device struct
4764 *
4765 * Return value:
4766 * Number of bytes the driver will need to DMA map at the same time in
4767 * order to perform well.
4768 */
4769static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4770{
4771 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4772 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4773}
4774
Brian King072b91f2008-07-01 13:14:30 -05004775static struct vio_device_id ibmvfc_device_table[] __devinitdata = {
4776 {"fcp", "IBM,vfc-client"},
4777 { "", "" }
4778};
4779MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4780
Brian Kingb0f4d4c2010-02-21 10:37:58 -06004781static struct dev_pm_ops ibmvfc_pm_ops = {
4782 .resume = ibmvfc_resume
4783};
4784
Brian King072b91f2008-07-01 13:14:30 -05004785static struct vio_driver ibmvfc_driver = {
4786 .id_table = ibmvfc_device_table,
4787 .probe = ibmvfc_probe,
4788 .remove = ibmvfc_remove,
Brian King39c1ffe2008-07-24 04:35:48 +10004789 .get_desired_dma = ibmvfc_get_desired_dma,
Brian King072b91f2008-07-01 13:14:30 -05004790 .driver = {
4791 .name = IBMVFC_NAME,
4792 .owner = THIS_MODULE,
Brian Kingb0f4d4c2010-02-21 10:37:58 -06004793 .pm = &ibmvfc_pm_ops,
Brian King072b91f2008-07-01 13:14:30 -05004794 }
4795};
4796
4797static struct fc_function_template ibmvfc_transport_functions = {
4798 .show_host_fabric_name = 1,
4799 .show_host_node_name = 1,
4800 .show_host_port_name = 1,
4801 .show_host_supported_classes = 1,
4802 .show_host_port_type = 1,
4803 .show_host_port_id = 1,
Brian King9ab36102009-03-20 15:44:38 -05004804 .show_host_maxframe_size = 1,
Brian King072b91f2008-07-01 13:14:30 -05004805
4806 .get_host_port_state = ibmvfc_get_host_port_state,
4807 .show_host_port_state = 1,
4808
4809 .get_host_speed = ibmvfc_get_host_speed,
4810 .show_host_speed = 1,
4811
4812 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4813 .terminate_rport_io = ibmvfc_terminate_rport_io,
4814
4815 .show_rport_maxframe_size = 1,
4816 .show_rport_supported_classes = 1,
4817
4818 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4819 .show_rport_dev_loss_tmo = 1,
4820
4821 .get_starget_node_name = ibmvfc_get_starget_node_name,
4822 .show_starget_node_name = 1,
4823
4824 .get_starget_port_name = ibmvfc_get_starget_port_name,
4825 .show_starget_port_name = 1,
4826
4827 .get_starget_port_id = ibmvfc_get_starget_port_id,
4828 .show_starget_port_id = 1,
Brian Kingd31429e2009-10-19 15:07:54 -05004829
4830 .bsg_request = ibmvfc_bsg_request,
4831 .bsg_timeout = ibmvfc_bsg_timeout,
Brian King072b91f2008-07-01 13:14:30 -05004832};
4833
4834/**
4835 * ibmvfc_module_init - Initialize the ibmvfc module
4836 *
4837 * Return value:
4838 * 0 on success / other on failure
4839 **/
4840static int __init ibmvfc_module_init(void)
4841{
4842 int rc;
4843
4844 if (!firmware_has_feature(FW_FEATURE_VIO))
4845 return -ENODEV;
4846
4847 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4848 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4849
4850 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4851 if (!ibmvfc_transport_template)
4852 return -ENOMEM;
4853
4854 rc = vio_register_driver(&ibmvfc_driver);
4855 if (rc)
4856 fc_release_transport(ibmvfc_transport_template);
4857 return rc;
4858}
4859
4860/**
4861 * ibmvfc_module_exit - Teardown the ibmvfc module
4862 *
4863 * Return value:
4864 * nothing
4865 **/
4866static void __exit ibmvfc_module_exit(void)
4867{
4868 vio_unregister_driver(&ibmvfc_driver);
4869 fc_release_transport(ibmvfc_transport_template);
4870}
4871
4872module_init(ibmvfc_module_init);
4873module_exit(ibmvfc_module_exit);