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scsi: ibmvfc: Add failed PRLI to cmd_status lookup array
[linux-2.6-block.git] / drivers / scsi / ibmvscsi / ibmvfc.c
CommitLineData
072b91f9
BK		 1/*
2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
3 *
4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
5 *
6 * Copyright (C) IBM Corporation, 2008
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/dma-mapping.h>
27#include <linux/dmapool.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/kthread.h>
5a0e3ad6 31#include <linux/slab.h>
072b91f9 32#include <linux/of.h>
b0f4d4cf 33#include <linux/pm.h>
072b91f9 34#include <linux/stringify.h>
75cc8cfc 35#include <linux/bsg-lib.h>
072b91f9
BK		 36#include <asm/firmware.h>
37#include <asm/irq.h>
38#include <asm/vio.h>
39#include <scsi/scsi.h>
40#include <scsi/scsi_cmnd.h>
41#include <scsi/scsi_host.h>
42#include <scsi/scsi_device.h>
43#include <scsi/scsi_tcq.h>
44#include <scsi/scsi_transport_fc.h>
d31429e1 45#include <scsi/scsi_bsg_fc.h>
072b91f9
BK		 46#include "ibmvfc.h"
47
48static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
49static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
1abf635d 50static u64 max_lun = IBMVFC_MAX_LUN;
072b91f9
BK		 51static unsigned int max_targets = IBMVFC_MAX_TARGETS;
52static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
53static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
072b91f9
BK		 54static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
55static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
a6104b1e 56static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
072b91f9
BK		 57static LIST_HEAD(ibmvfc_head);
58static DEFINE_SPINLOCK(ibmvfc_driver_lock);
59static struct scsi_transport_template *ibmvfc_transport_template;
60
61MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
62MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
63MODULE_LICENSE("GPL");
64MODULE_VERSION(IBMVFC_DRIVER_VERSION);
65
66module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
67MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
68 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
69module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
70MODULE_PARM_DESC(default_timeout,
71 "Default timeout in seconds for initialization and EH commands. "
72 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
73module_param_named(max_requests, max_requests, uint, S_IRUGO);
74MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
75 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
1abf635d 76module_param_named(max_lun, max_lun, ullong, S_IRUGO);
072b91f9
BK		 77MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
78 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
79module_param_named(max_targets, max_targets, uint, S_IRUGO);
80MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
81 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
545ef9a2 82module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
072b91f9
BK		 83MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
84 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
85module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
86MODULE_PARM_DESC(debug, "Enable driver debug information. "
87 "[Default=" __stringify(IBMVFC_DEBUG) "]");
072b91f9
BK		 88module_param_named(log_level, log_level, uint, 0);
89MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
90 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
a6104b1e 91module_param_named(cls3_error, cls3_error, uint, 0);
6c46301f 92MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
a6104b1e 93 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
072b91f9
BK		 94
95static const struct {
96 u16 status;
97 u16 error;
98 u8 result;
99 u8 retry;
100 int log;
101 char *name;
102} cmd_status [] = {
103 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
104 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
105 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
752b3232 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
072b91f9
BK		 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
110 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
497f9c50 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
072b91f9
BK		 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
117
118 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
119 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
752b3232
BK		 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
121 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
072b91f9 122 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
752b3232
BK		 123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
072b91f9 125 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
646d3857 126 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
072b91f9
BK		 127 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
128
129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
132 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
133 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
134 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
135 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
137 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
138 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
139 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
140
141 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
95237c25 142 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." },
072b91f9
BK		 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 *);
79111d08 149static void ibmvfc_npiv_logout(struct ibmvfc_host *);
072b91f9
BK		 150
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];
0aab6c3f 175 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 176 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
177 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f 178 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
072b91f9
BK		 179 break;
180 case IBMVFC_MAD_FORMAT:
0aab6c3f 181 entry->op_code = be32_to_cpu(mad->opcode);
072b91f9
BK		 182 break;
183 default:
184 break;
f36cfe6a 185 }
072b91f9
BK		 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];
0aab6c3f 208 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 209 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
210 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f
TD		 211 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
212 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
072b91f9
BK		 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:
0aab6c3f
TD		 218 entry->op_code = be32_to_cpu(mad->opcode);
219 entry->u.end.status = be16_to_cpu(mad->status);
072b91f9
BK		 220 break;
221 default:
222 break;
223
f36cfe6a 224 }
072b91f9
BK		 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;
0aab6c3f 279 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 280
281 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
4a2837d4 282 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
072b91f9
BK		 283 rsp->data.info.rsp_code))
284 return DID_ERROR << 16;
285
0aab6c3f 286 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 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:
d5da3040
BK		 436 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
437 tgt->action = action;
438 case IBMVFC_TGT_ACTION_DELETED_RPORT:
072b91f9
BK		 439 break;
440 default:
43c8da90
BK		 441 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
442 tgt->add_rport = 0;
072b91f9
BK		 443 tgt->action = action;
444 break;
445 }
446}
447
448/**
449 * ibmvfc_set_host_state - Set the state for the host
450 * @vhost: ibmvfc host struct
451 * @state: state to set host to
452 *
453 * Returns:
454 * 0 if state changed / non-zero if not changed
455 **/
456static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
457 enum ibmvfc_host_state state)
458{
459 int rc = 0;
460
461 switch (vhost->state) {
462 case IBMVFC_HOST_OFFLINE:
463 rc = -EINVAL;
464 break;
465 default:
466 vhost->state = state;
467 break;
f36cfe6a 468 }
072b91f9
BK		 469
470 return rc;
471}
472
473/**
474 * ibmvfc_set_host_action - Set the next init action for the host
475 * @vhost: ibmvfc host struct
476 * @action: action to perform
477 *
478 **/
479static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
480 enum ibmvfc_host_action action)
481{
482 switch (action) {
483 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
484 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
485 vhost->action = action;
486 break;
79111d08
BK		 487 case IBMVFC_HOST_ACTION_LOGO_WAIT:
488 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
489 vhost->action = action;
490 break;
072b91f9
BK		 491 case IBMVFC_HOST_ACTION_INIT_WAIT:
492 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
493 vhost->action = action;
494 break;
495 case IBMVFC_HOST_ACTION_QUERY:
496 switch (vhost->action) {
497 case IBMVFC_HOST_ACTION_INIT_WAIT:
498 case IBMVFC_HOST_ACTION_NONE:
43c8da90 499 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 500 vhost->action = action;
501 break;
502 default:
503 break;
f36cfe6a 504 }
072b91f9
BK		 505 break;
506 case IBMVFC_HOST_ACTION_TGT_INIT:
507 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
508 vhost->action = action;
509 break;
510 case IBMVFC_HOST_ACTION_INIT:
511 case IBMVFC_HOST_ACTION_TGT_DEL:
73ee5d86
BK		 512 switch (vhost->action) {
513 case IBMVFC_HOST_ACTION_RESET:
514 case IBMVFC_HOST_ACTION_REENABLE:
515 break;
516 default:
517 vhost->action = action;
518 break;
f36cfe6a 519 }
73ee5d86
BK		 520 break;
521 case IBMVFC_HOST_ACTION_LOGO:
072b91f9 522 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 523 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 524 case IBMVFC_HOST_ACTION_NONE:
73ee5d86
BK		 525 case IBMVFC_HOST_ACTION_RESET:
526 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 527 default:
528 vhost->action = action;
529 break;
f36cfe6a 530 }
072b91f9
BK		 531}
532
533/**
534 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
535 * @vhost: ibmvfc host struct
536 *
537 * Return value:
538 * nothing
539 **/
540static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
541{
542 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 543 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
544 scsi_block_requests(vhost->host);
545 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
546 }
072b91f9
BK		 547 } else
548 vhost->reinit = 1;
549
550 wake_up(&vhost->work_wait_q);
551}
552
553/**
554 * ibmvfc_link_down - Handle a link down event from the adapter
555 * @vhost: ibmvfc host struct
556 * @state: ibmvfc host state to enter
557 *
558 **/
559static void ibmvfc_link_down(struct ibmvfc_host *vhost,
560 enum ibmvfc_host_state state)
561{
562 struct ibmvfc_target *tgt;
563
564 ENTER;
565 scsi_block_requests(vhost->host);
566 list_for_each_entry(tgt, &vhost->targets, queue)
567 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
568 ibmvfc_set_host_state(vhost, state);
569 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
570 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
571 wake_up(&vhost->work_wait_q);
572 LEAVE;
573}
574
575/**
576 * ibmvfc_init_host - Start host initialization
577 * @vhost: ibmvfc host struct
578 *
579 * Return value:
580 * nothing
581 **/
861890c6 582static void ibmvfc_init_host(struct ibmvfc_host *vhost)
072b91f9
BK		 583{
584 struct ibmvfc_target *tgt;
585
586 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82 587 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 588 dev_err(vhost->dev,
589 "Host initialization retries exceeded. Taking adapter offline\n");
590 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
591 return;
592 }
593 }
594
595 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
861890c6
BK		 596 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
597 vhost->async_crq.cur = 0;
cf6f10d7 598
072b91f9 599 list_for_each_entry(tgt, &vhost->targets, queue)
5e47167b 600 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 601 scsi_block_requests(vhost->host);
602 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
603 vhost->job_step = ibmvfc_npiv_login;
604 wake_up(&vhost->work_wait_q);
605 }
606}
607
608/**
609 * ibmvfc_send_crq - Send a CRQ
610 * @vhost: ibmvfc host struct
611 * @word1: the first 64 bits of the data
612 * @word2: the second 64 bits of the data
613 *
614 * Return value:
615 * 0 on success / other on failure
616 **/
617static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
618{
619 struct vio_dev *vdev = to_vio_dev(vhost->dev);
620 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
621}
622
623/**
624 * ibmvfc_send_crq_init - Send a CRQ init message
625 * @vhost: ibmvfc host struct
626 *
627 * Return value:
628 * 0 on success / other on failure
629 **/
630static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
631{
632 ibmvfc_dbg(vhost, "Sending CRQ init\n");
633 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
634}
635
636/**
637 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
638 * @vhost: ibmvfc host struct
639 *
640 * Return value:
641 * 0 on success / other on failure
642 **/
643static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
644{
645 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
646 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
647}
648
649/**
650 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
651 * @vhost: ibmvfc host struct
652 *
653 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
654 * the crq with the hypervisor.
655 **/
656static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
657{
73ee5d86 658 long rc = 0;
072b91f9
BK		 659 struct vio_dev *vdev = to_vio_dev(vhost->dev);
660 struct ibmvfc_crq_queue *crq = &vhost->crq;
661
662 ibmvfc_dbg(vhost, "Releasing CRQ\n");
663 free_irq(vdev->irq, vhost);
039a0898 664 tasklet_kill(&vhost->tasklet);
072b91f9 665 do {
73ee5d86
BK		 666 if (rc)
667 msleep(100);
072b91f9
BK		 668 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
669 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
670
671 vhost->state = IBMVFC_NO_CRQ;
79111d08 672 vhost->logged_in = 0;
072b91f9
BK		 673 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
674 free_page((unsigned long)crq->msgs);
675}
676
677/**
678 * ibmvfc_reenable_crq_queue - reenables the CRQ
679 * @vhost: ibmvfc host struct
680 *
681 * Return value:
682 * 0 on success / other on failure
683 **/
684static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
685{
73ee5d86 686 int rc = 0;
072b91f9
BK		 687 struct vio_dev *vdev = to_vio_dev(vhost->dev);
688
689 /* Re-enable the CRQ */
690 do {
73ee5d86
BK		 691 if (rc)
692 msleep(100);
072b91f9
BK		 693 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
694 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
695
696 if (rc)
697 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
698
699 return rc;
700}
701
702/**
703 * ibmvfc_reset_crq - resets a crq after a failure
704 * @vhost: ibmvfc host struct
705 *
706 * Return value:
707 * 0 on success / other on failure
708 **/
709static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
710{
73ee5d86
BK		 711 int rc = 0;
712 unsigned long flags;
072b91f9
BK		 713 struct vio_dev *vdev = to_vio_dev(vhost->dev);
714 struct ibmvfc_crq_queue *crq = &vhost->crq;
715
716 /* Close the CRQ */
717 do {
73ee5d86
BK		 718 if (rc)
719 msleep(100);
072b91f9
BK		 720 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
721 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
722
73ee5d86 723 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 724 vhost->state = IBMVFC_NO_CRQ;
79111d08 725 vhost->logged_in = 0;
072b91f9
BK		 726
727 /* Clean out the queue */
728 memset(crq->msgs, 0, PAGE_SIZE);
729 crq->cur = 0;
730
731 /* And re-open it again */
732 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
733 crq->msg_token, PAGE_SIZE);
734
735 if (rc == H_CLOSED)
736 /* Adapter is good, but other end is not ready */
737 dev_warn(vhost->dev, "Partner adapter not ready\n");
738 else if (rc != 0)
739 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
73ee5d86 740 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 741
742 return rc;
743}
744
745/**
746 * ibmvfc_valid_event - Determines if event is valid.
747 * @pool: event_pool that contains the event
748 * @evt: ibmvfc event to be checked for validity
749 *
750 * Return value:
751 * 1 if event is valid / 0 if event is not valid
752 **/
753static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
754 struct ibmvfc_event *evt)
755{
756 int index = evt - pool->events;
757 if (index < 0 || index >= pool->size) /* outside of bounds */
758 return 0;
759 if (evt != pool->events + index) /* unaligned */
760 return 0;
761 return 1;
762}
763
764/**
765 * ibmvfc_free_event - Free the specified event
766 * @evt: ibmvfc_event to be freed
767 *
768 **/
769static void ibmvfc_free_event(struct ibmvfc_event *evt)
770{
771 struct ibmvfc_host *vhost = evt->vhost;
772 struct ibmvfc_event_pool *pool = &vhost->pool;
773
774 BUG_ON(!ibmvfc_valid_event(pool, evt));
775 BUG_ON(atomic_inc_return(&evt->free) != 1);
776 list_add_tail(&evt->queue, &vhost->free);
777}
778
779/**
780 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
781 * @evt: ibmvfc event struct
782 *
783 * This function does not setup any error status, that must be done
784 * before this function gets called.
785 **/
786static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
787{
788 struct scsi_cmnd *cmnd = evt->cmnd;
789
790 if (cmnd) {
791 scsi_dma_unmap(cmnd);
792 cmnd->scsi_done(cmnd);
793 }
794
ad8dcffa
BK		 795 if (evt->eh_comp)
796 complete(evt->eh_comp);
797
072b91f9
BK		 798 ibmvfc_free_event(evt);
799}
800
801/**
802 * ibmvfc_fail_request - Fail request with specified error code
803 * @evt: ibmvfc event struct
804 * @error_code: error code to fail request with
805 *
806 * Return value:
807 * none
808 **/
809static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
810{
811 if (evt->cmnd) {
812 evt->cmnd->result = (error_code << 16);
813 evt->done = ibmvfc_scsi_eh_done;
814 } else
0aab6c3f 815 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
072b91f9
BK		 816
817 list_del(&evt->queue);
818 del_timer(&evt->timer);
819 ibmvfc_trc_end(evt);
820 evt->done(evt);
821}
822
823/**
824 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
825 * @vhost: ibmvfc host struct
826 * @error_code: error code to fail requests with
827 *
828 * Return value:
829 * none
830 **/
831static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
832{
833 struct ibmvfc_event *evt, *pos;
834
835 ibmvfc_dbg(vhost, "Purging all requests\n");
836 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
837 ibmvfc_fail_request(evt, error_code);
838}
839
840/**
79111d08 841 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
072b91f9
BK		 842 * @vhost: struct ibmvfc host to reset
843 **/
79111d08 844static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
072b91f9 845{
072b91f9 846 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 847 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
848 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
072b91f9
BK		 849}
850
851/**
79111d08 852 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
072b91f9
BK		 853 * @vhost: struct ibmvfc host to reset
854 **/
79111d08
BK		 855static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
856{
857 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
858 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
859 scsi_block_requests(vhost->host);
860 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
861 vhost->job_step = ibmvfc_npiv_logout;
862 wake_up(&vhost->work_wait_q);
863 } else
864 ibmvfc_hard_reset_host(vhost);
865}
866
867/**
868 * ibmvfc_reset_host - Reset the connection to the server
869 * @vhost: ibmvfc host struct
870 **/
072b91f9
BK		 871static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
872{
873 unsigned long flags;
874
875 spin_lock_irqsave(vhost->host->host_lock, flags);
876 __ibmvfc_reset_host(vhost);
877 spin_unlock_irqrestore(vhost->host->host_lock, flags);
878}
879
880/**
881 * ibmvfc_retry_host_init - Retry host initialization if allowed
882 * @vhost: ibmvfc host struct
883 *
7d0e4622
BK		 884 * Returns: 1 if init will be retried / 0 if not
885 *
072b91f9 886 **/
7d0e4622 887static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
072b91f9 888{
7d0e4622
BK		 889 int retry = 0;
890
072b91f9 891 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82
BK		 892 vhost->delay_init = 1;
893 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 894 dev_err(vhost->dev,
895 "Host initialization retries exceeded. Taking adapter offline\n");
896 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1c41fa82 897 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
072b91f9 898 __ibmvfc_reset_host(vhost);
7d0e4622 899 else {
072b91f9 900 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
7d0e4622
BK		 901 retry = 1;
902 }
072b91f9
BK		 903 }
904
905 wake_up(&vhost->work_wait_q);
7d0e4622 906 return retry;
072b91f9
BK		 907}
908
909/**
b3c10489 910 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 911 * @starget: scsi target struct
912 *
913 * Return value:
914 * ibmvfc_target struct / NULL if not found
915 **/
b3c10489 916static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 917{
918 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
919 struct ibmvfc_host *vhost = shost_priv(shost);
920 struct ibmvfc_target *tgt;
921
922 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 923 if (tgt->target_id == starget->id) {
924 kref_get(&tgt->kref);
072b91f9 925 return tgt;
b3c10489 926 }
072b91f9
BK		 927 return NULL;
928}
929
930/**
b3c10489 931 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 932 * @starget: scsi target struct
933 *
934 * Return value:
935 * ibmvfc_target struct / NULL if not found
936 **/
b3c10489 937static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 938{
939 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
940 struct ibmvfc_target *tgt;
941 unsigned long flags;
942
943 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 944 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 945 spin_unlock_irqrestore(shost->host_lock, flags);
946 return tgt;
947}
948
949/**
950 * ibmvfc_get_host_speed - Get host port speed
951 * @shost: scsi host struct
952 *
953 * Return value:
954 * none
955 **/
956static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
957{
958 struct ibmvfc_host *vhost = shost_priv(shost);
959 unsigned long flags;
960
961 spin_lock_irqsave(shost->host_lock, flags);
962 if (vhost->state == IBMVFC_ACTIVE) {
0aab6c3f 963 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
072b91f9
BK		 964 case 1:
965 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
966 break;
967 case 2:
968 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
969 break;
970 case 4:
971 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
972 break;
973 case 8:
974 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
975 break;
976 case 10:
977 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
978 break;
979 case 16:
980 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
981 break;
982 default:
775a42ec 983 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
0aab6c3f 984 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
072b91f9
BK		 985 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
986 break;
987 }
988 } else
989 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
990 spin_unlock_irqrestore(shost->host_lock, flags);
991}
992
993/**
994 * ibmvfc_get_host_port_state - Get host port state
995 * @shost: scsi host struct
996 *
997 * Return value:
998 * none
999 **/
1000static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1001{
1002 struct ibmvfc_host *vhost = shost_priv(shost);
1003 unsigned long flags;
1004
1005 spin_lock_irqsave(shost->host_lock, flags);
1006 switch (vhost->state) {
1007 case IBMVFC_INITIALIZING:
1008 case IBMVFC_ACTIVE:
1009 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1010 break;
1011 case IBMVFC_LINK_DOWN:
1012 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1013 break;
1014 case IBMVFC_LINK_DEAD:
1015 case IBMVFC_HOST_OFFLINE:
1016 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1017 break;
1018 case IBMVFC_HALTED:
1019 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1020 break;
0ae808e0
BK		 1021 case IBMVFC_NO_CRQ:
1022 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1023 break;
072b91f9
BK		 1024 default:
1025 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1026 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1027 break;
1028 }
1029 spin_unlock_irqrestore(shost->host_lock, flags);
1030}
1031
1032/**
1033 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1034 * @rport: rport struct
1035 * @timeout: timeout value
1036 *
1037 * Return value:
1038 * none
1039 **/
1040static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1041{
1042 if (timeout)
1043 rport->dev_loss_tmo = timeout;
1044 else
1045 rport->dev_loss_tmo = 1;
1046}
1047
b3c10489
BK		 1048/**
1049 * ibmvfc_release_tgt - Free memory allocated for a target
1050 * @kref: kref struct
1051 *
1052 **/
1053static void ibmvfc_release_tgt(struct kref *kref)
1054{
1055 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1056 kfree(tgt);
1057}
1058
072b91f9
BK		 1059/**
1060 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1061 * @starget: scsi target struct
1062 *
1063 * Return value:
1064 * none
1065 **/
1066static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1067{
b3c10489 1068 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1069 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1070 if (tgt)
1071 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1072}
1073
1074/**
1075 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1076 * @starget: scsi target struct
1077 *
1078 * Return value:
1079 * none
1080 **/
1081static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1082{
b3c10489 1083 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1084 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1085 if (tgt)
1086 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1087}
1088
1089/**
1090 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1091 * @starget: scsi target struct
1092 *
1093 * Return value:
1094 * none
1095 **/
1096static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1097{
b3c10489 1098 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1099 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1100 if (tgt)
1101 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1102}
1103
1104/**
1105 * ibmvfc_wait_while_resetting - Wait while the host resets
1106 * @vhost: ibmvfc host struct
1107 *
1108 * Return value:
1109 * 0 on success / other on failure
1110 **/
1111static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1112{
1113 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1114 ((vhost->state == IBMVFC_ACTIVE ||
1115 vhost->state == IBMVFC_HOST_OFFLINE ||
1116 vhost->state == IBMVFC_LINK_DEAD) &&
1117 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1118 (init_timeout * HZ));
1119
1120 return timeout ? 0 : -EIO;
1121}
1122
1123/**
1124 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1125 * @shost: scsi host struct
1126 *
1127 * Return value:
1128 * 0 on success / other on failure
1129 **/
1130static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1131{
1132 struct ibmvfc_host *vhost = shost_priv(shost);
1133
1134 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1135 ibmvfc_reset_host(vhost);
1136 return ibmvfc_wait_while_resetting(vhost);
1137}
1138
1139/**
1140 * ibmvfc_gather_partition_info - Gather info about the LPAR
1141 *
1142 * Return value:
1143 * none
1144 **/
1145static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1146{
1147 struct device_node *rootdn;
1148 const char *name;
1149 const unsigned int *num;
1150
1151 rootdn = of_find_node_by_path("/");
1152 if (!rootdn)
1153 return;
1154
1155 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1156 if (name)
1157 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1158 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1159 if (num)
1160 vhost->partition_number = *num;
1161 of_node_put(rootdn);
1162}
1163
1164/**
1165 * ibmvfc_set_login_info - Setup info for NPIV login
1166 * @vhost: ibmvfc host struct
1167 *
1168 * Return value:
1169 * none
1170 **/
1171static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1172{
1173 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
61c7a080 1174 struct device_node *of_node = vhost->dev->of_node;
072b91f9
BK		 1175 const char *location;
1176
1177 memset(login_info, 0, sizeof(*login_info));
1178
0aab6c3f
TD		 1179 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1180 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1181 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1182 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1183 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1184 login_info->vfc_frame_version = cpu_to_be32(1);
1185 login_info->fcp_version = cpu_to_be16(3);
1186 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
072b91f9 1187 if (vhost->client_migrated)
0aab6c3f 1188 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
072b91f9 1189
0aab6c3f
TD		 1190 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1191 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1192 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1193 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
072b91f9
BK		 1194 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1195 strncpy(login_info->device_name,
71610f55 1196 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
072b91f9
BK		 1197
1198 location = of_get_property(of_node, "ibm,loc-code", NULL);
71610f55 1199 location = location ? location : dev_name(vhost->dev);
072b91f9
BK		 1200 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1201}
1202
1203/**
1204 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1205 * @vhost: ibmvfc host who owns the event pool
1206 *
1207 * Returns zero on success.
1208 **/
1209static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1210{
1211 int i;
1212 struct ibmvfc_event_pool *pool = &vhost->pool;
1213
1214 ENTER;
1215 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1216 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1217 if (!pool->events)
1218 return -ENOMEM;
1219
1220 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1221 pool->size * sizeof(*pool->iu_storage),
1222 &pool->iu_token, 0);
1223
1224 if (!pool->iu_storage) {
1225 kfree(pool->events);
1226 return -ENOMEM;
1227 }
1228
1229 for (i = 0; i < pool->size; ++i) {
1230 struct ibmvfc_event *evt = &pool->events[i];
1231 atomic_set(&evt->free, 1);
1232 evt->crq.valid = 0x80;
0aab6c3f 1233 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
072b91f9
BK		 1234 evt->xfer_iu = pool->iu_storage + i;
1235 evt->vhost = vhost;
1236 evt->ext_list = NULL;
1237 list_add_tail(&evt->queue, &vhost->free);
1238 }
1239
1240 LEAVE;
1241 return 0;
1242}
1243
1244/**
1245 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1246 * @vhost: ibmvfc host who owns the event pool
1247 *
1248 **/
1249static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1250{
1251 int i;
1252 struct ibmvfc_event_pool *pool = &vhost->pool;
1253
1254 ENTER;
1255 for (i = 0; i < pool->size; ++i) {
1256 list_del(&pool->events[i].queue);
1257 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1258 if (pool->events[i].ext_list)
1259 dma_pool_free(vhost->sg_pool,
1260 pool->events[i].ext_list,
1261 pool->events[i].ext_list_token);
1262 }
1263
1264 kfree(pool->events);
1265 dma_free_coherent(vhost->dev,
1266 pool->size * sizeof(*pool->iu_storage),
1267 pool->iu_storage, pool->iu_token);
1268 LEAVE;
1269}
1270
1271/**
1272 * ibmvfc_get_event - Gets the next free event in pool
1273 * @vhost: ibmvfc host struct
1274 *
1275 * Returns a free event from the pool.
1276 **/
1277static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1278{
1279 struct ibmvfc_event *evt;
1280
1281 BUG_ON(list_empty(&vhost->free));
1282 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1283 atomic_set(&evt->free, 0);
1284 list_del(&evt->queue);
1285 return evt;
1286}
1287
1288/**
1289 * ibmvfc_init_event - Initialize fields in an event struct that are always
1290 * required.
1291 * @evt: The event
1292 * @done: Routine to call when the event is responded to
1293 * @format: SRP or MAD format
1294 **/
1295static void ibmvfc_init_event(struct ibmvfc_event *evt,
1296 void (*done) (struct ibmvfc_event *), u8 format)
1297{
1298 evt->cmnd = NULL;
1299 evt->sync_iu = NULL;
1300 evt->crq.format = format;
1301 evt->done = done;
ad8dcffa 1302 evt->eh_comp = NULL;
072b91f9
BK		 1303}
1304
1305/**
1306 * ibmvfc_map_sg_list - Initialize scatterlist
1307 * @scmd: scsi command struct
1308 * @nseg: number of scatterlist segments
1309 * @md: memory descriptor list to initialize
1310 **/
1311static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1312 struct srp_direct_buf *md)
1313{
1314 int i;
1315 struct scatterlist *sg;
1316
1317 scsi_for_each_sg(scmd, sg, nseg, i) {
0aab6c3f
TD		 1318 md[i].va = cpu_to_be64(sg_dma_address(sg));
1319 md[i].len = cpu_to_be32(sg_dma_len(sg));
072b91f9
BK		 1320 md[i].key = 0;
1321 }
1322}
1323
1324/**
1325 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
91ebc1fa 1326 * @scmd: struct scsi_cmnd with the scatterlist
072b91f9
BK		 1327 * @evt: ibmvfc event struct
1328 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1329 * @dev: device for which to map dma memory
1330 *
1331 * Returns:
1332 * 0 on success / non-zero on failure
1333 **/
1334static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1335 struct ibmvfc_event *evt,
1336 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1337{
1338
1339 int sg_mapped;
1340 struct srp_direct_buf *data = &vfc_cmd->ioba;
1341 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1342
a6104b1e
TD		 1343 if (cls3_error)
1344 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1345
072b91f9
BK		 1346 sg_mapped = scsi_dma_map(scmd);
1347 if (!sg_mapped) {
0aab6c3f 1348 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
072b91f9
BK		 1349 return 0;
1350 } else if (unlikely(sg_mapped < 0)) {
1351 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1352 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1353 return sg_mapped;
1354 }
1355
1356 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
0aab6c3f 1357 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
072b91f9
BK		 1358 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1359 } else {
0aab6c3f 1360 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
072b91f9
BK		 1361 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1362 }
1363
1364 if (sg_mapped == 1) {
1365 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1366 return 0;
1367 }
1368
0aab6c3f 1369 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
072b91f9
BK		 1370
1371 if (!evt->ext_list) {
1372 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1373 &evt->ext_list_token);
1374
1375 if (!evt->ext_list) {
64b840dd
BK		 1376 scsi_dma_unmap(scmd);
1377 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1378 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
072b91f9
BK		 1379 return -ENOMEM;
1380 }
1381 }
1382
1383 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1384
0aab6c3f
TD		 1385 data->va = cpu_to_be64(evt->ext_list_token);
1386 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
072b91f9
BK		 1387 data->key = 0;
1388 return 0;
1389}
1390
1391/**
1392 * ibmvfc_timeout - Internal command timeout handler
1393 * @evt: struct ibmvfc_event that timed out
1394 *
1395 * Called when an internally generated command times out
1396 **/
9a5d04fc 1397static void ibmvfc_timeout(struct timer_list *t)
072b91f9 1398{
9a5d04fc 1399 struct ibmvfc_event *evt = from_timer(evt, t, timer);
072b91f9
BK		 1400 struct ibmvfc_host *vhost = evt->vhost;
1401 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1402 ibmvfc_reset_host(vhost);
1403}
1404
1405/**
1406 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1407 * @evt: event to be sent
1408 * @vhost: ibmvfc host struct
1409 * @timeout: timeout in seconds - 0 means do not time command
1410 *
1411 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1412 **/
1413static int ibmvfc_send_event(struct ibmvfc_event *evt,
1414 struct ibmvfc_host *vhost, unsigned long timeout)
1415{
0aab6c3f 1416 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
072b91f9
BK		 1417 int rc;
1418
1419 /* Copy the IU into the transfer area */
1420 *evt->xfer_iu = evt->iu;
1421 if (evt->crq.format == IBMVFC_CMD_FORMAT)
0aab6c3f 1422 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
072b91f9 1423 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
0aab6c3f 1424 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
072b91f9
BK		 1425 else
1426 BUG();
1427
1428 list_add_tail(&evt->queue, &vhost->sent);
9a5d04fc 1429 timer_setup(&evt->timer, ibmvfc_timeout, 0);
072b91f9
BK		 1430
1431 if (timeout) {
072b91f9 1432 evt->timer.expires = jiffies + (timeout * HZ);
072b91f9
BK		 1433 add_timer(&evt->timer);
1434 }
1435
a528ab7a
BK		 1436 mb();
1437
0aab6c3f
TD		 1438 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1439 be64_to_cpu(crq_as_u64[1])))) {
072b91f9
BK		 1440 list_del(&evt->queue);
1441 del_timer(&evt->timer);
1442
1443 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1444 * Firmware will send a CRQ with a transport event (0xFF) to
1445 * tell this client what has happened to the transport. This
1446 * will be handled in ibmvfc_handle_crq()
1447 */
1448 if (rc == H_CLOSED) {
1449 if (printk_ratelimit())
1450 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1451 if (evt->cmnd)
1452 scsi_dma_unmap(evt->cmnd);
1453 ibmvfc_free_event(evt);
1454 return SCSI_MLQUEUE_HOST_BUSY;
1455 }
1456
1457 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1458 if (evt->cmnd) {
1459 evt->cmnd->result = DID_ERROR << 16;
1460 evt->done = ibmvfc_scsi_eh_done;
1461 } else
0aab6c3f 1462 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
072b91f9
BK		 1463
1464 evt->done(evt);
1465 } else
1466 ibmvfc_trc_start(evt);
1467
1468 return 0;
1469}
1470
1471/**
1472 * ibmvfc_log_error - Log an error for the failed command if appropriate
1473 * @evt: ibmvfc event to log
1474 *
1475 **/
1476static void ibmvfc_log_error(struct ibmvfc_event *evt)
1477{
1478 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1479 struct ibmvfc_host *vhost = evt->vhost;
1480 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1481 struct scsi_cmnd *cmnd = evt->cmnd;
1482 const char *err = unknown_error;
0aab6c3f 1483 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 1484 int logerr = 0;
1485 int rsp_code = 0;
1486
1487 if (index >= 0) {
1488 logerr = cmd_status[index].log;
1489 err = cmd_status[index].name;
1490 }
1491
0ae808e0 1492 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1493 return;
1494
1495 if (rsp->flags & FCP_RSP_LEN_VALID)
1496 rsp_code = rsp->data.info.rsp_code;
1497
6dc6a944 1498 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
072b91f9
BK		 1499 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1500 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1501 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1502}
1503
6d29cc56
BK		 1504/**
1505 * ibmvfc_relogin - Log back into the specified device
1506 * @sdev: scsi device struct
1507 *
1508 **/
1509static void ibmvfc_relogin(struct scsi_device *sdev)
1510{
1511 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1512 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1513 struct ibmvfc_target *tgt;
1514
1515 list_for_each_entry(tgt, &vhost->targets, queue) {
1516 if (rport == tgt->rport) {
1517 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1518 break;
1519 }
1520 }
1521
1522 ibmvfc_reinit_host(vhost);
1523}
1524
072b91f9
BK		 1525/**
1526 * ibmvfc_scsi_done - Handle responses from commands
1527 * @evt: ibmvfc event to be handled
1528 *
1529 * Used as a callback when sending scsi cmds.
1530 **/
1531static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1532{
1533 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1534 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1535 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d 1536 u32 rsp_len = 0;
0aab6c3f 1537 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
072b91f9
BK		 1538
1539 if (cmnd) {
0aab6c3f
TD		 1540 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1541 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
072b91f9 1542 else if (rsp->flags & FCP_RESID_UNDER)
0aab6c3f 1543 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
072b91f9
BK		 1544 else
1545 scsi_set_resid(cmnd, 0);
1546
1547 if (vfc_cmd->status) {
1548 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1549
1550 if (rsp->flags & FCP_RSP_LEN_VALID)
0aab6c3f 1551 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 1552 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1553 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1554 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9 1555 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
0aab6c3f
TD		 1556 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1557 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
6d29cc56 1558 ibmvfc_relogin(cmnd->device);
072b91f9 1559
50119dad
BK		 1560 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1561 cmnd->result = (DID_ERROR << 16);
1562
072b91f9
BK		 1563 ibmvfc_log_error(evt);
1564 }
1565
1566 if (!cmnd->result &&
1567 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1568 cmnd->result = (DID_ERROR << 16);
1569
1570 scsi_dma_unmap(cmnd);
1571 cmnd->scsi_done(cmnd);
1572 }
1573
ad8dcffa
BK		 1574 if (evt->eh_comp)
1575 complete(evt->eh_comp);
1576
072b91f9
BK		 1577 ibmvfc_free_event(evt);
1578}
1579
1580/**
1581 * ibmvfc_host_chkready - Check if the host can accept commands
1582 * @vhost: struct ibmvfc host
1583 *
1584 * Returns:
1585 * 1 if host can accept command / 0 if not
1586 **/
1587static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1588{
1589 int result = 0;
1590
1591 switch (vhost->state) {
1592 case IBMVFC_LINK_DEAD:
1593 case IBMVFC_HOST_OFFLINE:
1594 result = DID_NO_CONNECT << 16;
1595 break;
1596 case IBMVFC_NO_CRQ:
1597 case IBMVFC_INITIALIZING:
1598 case IBMVFC_HALTED:
1599 case IBMVFC_LINK_DOWN:
1600 result = DID_REQUEUE << 16;
1601 break;
1602 case IBMVFC_ACTIVE:
1603 result = 0;
1604 break;
f36cfe6a 1605 }
072b91f9
BK		 1606
1607 return result;
1608}
1609
1610/**
1611 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1612 * @cmnd: struct scsi_cmnd to be executed
1613 * @done: Callback function to be called when cmnd is completed
1614 *
1615 * Returns:
1616 * 0 on success / other on failure
1617 **/
f281233d 1618static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
072b91f9
BK		 1619 void (*done) (struct scsi_cmnd *))
1620{
1621 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1622 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1623 struct ibmvfc_cmd *vfc_cmd;
1624 struct ibmvfc_event *evt;
072b91f9
BK		 1625 int rc;
1626
1627 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1628 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1629 cmnd->result = rc;
1630 done(cmnd);
1631 return 0;
1632 }
1633
1634 cmnd->result = (DID_OK << 16);
1635 evt = ibmvfc_get_event(vhost);
1636 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1637 evt->cmnd = cmnd;
1638 cmnd->scsi_done = done;
1639 vfc_cmd = &evt->iu.cmd;
1640 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
0aab6c3f
TD		 1641 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1642 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1643 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1644 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1645 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1646 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1647 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1648 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
072b91f9
BK		 1649 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1650 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1651
50668633
CH		 1652 if (cmnd->flags & SCMD_TAGGED) {
1653 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1654 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
072b91f9
BK		 1655 }
1656
1657 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1658 return ibmvfc_send_event(evt, vhost, 0);
1659
1660 ibmvfc_free_event(evt);
1661 if (rc == -ENOMEM)
1662 return SCSI_MLQUEUE_HOST_BUSY;
1663
1664 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1665 scmd_printk(KERN_ERR, cmnd,
1666 "Failed to map DMA buffer for command. rc=%d\n", rc);
1667
1668 cmnd->result = DID_ERROR << 16;
1669 done(cmnd);
1670 return 0;
1671}
1672
f281233d
JG		 1673static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1674
072b91f9
BK		 1675/**
1676 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1677 * @evt: ibmvfc event struct
1678 *
1679 **/
1680static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1681{
1682 /* copy the response back */
1683 if (evt->sync_iu)
1684 *evt->sync_iu = *evt->xfer_iu;
1685
1686 complete(&evt->comp);
1687}
1688
d31429e1
BK		 1689/**
1690 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1691 * @evt: struct ibmvfc_event
1692 *
1693 **/
1694static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1695{
1696 struct ibmvfc_host *vhost = evt->vhost;
1697
1698 ibmvfc_free_event(evt);
1699 vhost->aborting_passthru = 0;
1700 dev_info(vhost->dev, "Passthru command cancelled\n");
1701}
1702
1703/**
1704 * ibmvfc_bsg_timeout - Handle a BSG timeout
75cc8cfc 1705 * @job: struct bsg_job that timed out
d31429e1
BK		 1706 *
1707 * Returns:
1708 * 0 on success / other on failure
1709 **/
75cc8cfc 1710static int ibmvfc_bsg_timeout(struct bsg_job *job)
d31429e1 1711{
cd21c605 1712 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
d31429e1
BK		 1713 unsigned long port_id = (unsigned long)job->dd_data;
1714 struct ibmvfc_event *evt;
1715 struct ibmvfc_tmf *tmf;
1716 unsigned long flags;
1717 int rc;
1718
1719 ENTER;
1720 spin_lock_irqsave(vhost->host->host_lock, flags);
1721 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1722 __ibmvfc_reset_host(vhost);
1723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1724 return 0;
1725 }
1726
1727 vhost->aborting_passthru = 1;
1728 evt = ibmvfc_get_event(vhost);
1729 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1730
1731 tmf = &evt->iu.tmf;
1732 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1733 tmf->common.version = cpu_to_be32(1);
1734 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1735 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1736 tmf->scsi_id = cpu_to_be64(port_id);
1737 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1738 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
d31429e1
BK		 1739 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1740
1741 if (rc != 0) {
1742 vhost->aborting_passthru = 0;
1743 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1744 rc = -EIO;
1745 } else
1746 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1747 port_id);
1748
1749 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1750
1751 LEAVE;
1752 return rc;
1753}
1754
1755/**
1756 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1757 * @vhost: struct ibmvfc_host to send command
1758 * @port_id: port ID to send command
1759 *
1760 * Returns:
1761 * 0 on success / other on failure
1762 **/
1763static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1764{
1765 struct ibmvfc_port_login *plogi;
1766 struct ibmvfc_target *tgt;
1767 struct ibmvfc_event *evt;
1768 union ibmvfc_iu rsp_iu;
1769 unsigned long flags;
1770 int rc = 0, issue_login = 1;
1771
1772 ENTER;
1773 spin_lock_irqsave(vhost->host->host_lock, flags);
1774 list_for_each_entry(tgt, &vhost->targets, queue) {
1775 if (tgt->scsi_id == port_id) {
1776 issue_login = 0;
1777 break;
1778 }
1779 }
1780
1781 if (!issue_login)
1782 goto unlock_out;
1783 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1784 goto unlock_out;
1785
1786 evt = ibmvfc_get_event(vhost);
1787 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1788 plogi = &evt->iu.plogi;
1789 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 1790 plogi->common.version = cpu_to_be32(1);
1791 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1792 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1793 plogi->scsi_id = cpu_to_be64(port_id);
d31429e1
BK		 1794 evt->sync_iu = &rsp_iu;
1795 init_completion(&evt->comp);
1796
1797 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1798 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1799
1800 if (rc)
1801 return -EIO;
1802
1803 wait_for_completion(&evt->comp);
1804
1805 if (rsp_iu.plogi.common.status)
1806 rc = -EIO;
1807
1808 spin_lock_irqsave(vhost->host->host_lock, flags);
1809 ibmvfc_free_event(evt);
1810unlock_out:
1811 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1812 LEAVE;
1813 return rc;
1814}
1815
1816/**
1817 * ibmvfc_bsg_request - Handle a BSG request
75cc8cfc 1818 * @job: struct bsg_job to be executed
d31429e1
BK		 1819 *
1820 * Returns:
1821 * 0 on success / other on failure
1822 **/
75cc8cfc 1823static int ibmvfc_bsg_request(struct bsg_job *job)
d31429e1 1824{
cd21c605 1825 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1d69b122 1826 struct fc_rport *rport = fc_bsg_to_rport(job);
d31429e1
BK		 1827 struct ibmvfc_passthru_mad *mad;
1828 struct ibmvfc_event *evt;
1829 union ibmvfc_iu rsp_iu;
1830 unsigned long flags, port_id = -1;
01e0e15c
JT		 1831 struct fc_bsg_request *bsg_request = job->request;
1832 struct fc_bsg_reply *bsg_reply = job->reply;
1833 unsigned int code = bsg_request->msgcode;
d31429e1
BK		 1834 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1835 u32 fc_flags, rsp_len;
1836
1837 ENTER;
01e0e15c 1838 bsg_reply->reply_payload_rcv_len = 0;
d31429e1
BK		 1839 if (rport)
1840 port_id = rport->port_id;
1841
1842 switch (code) {
1843 case FC_BSG_HST_ELS_NOLOGIN:
01e0e15c
JT		 1844 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
1845 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
1846 bsg_request->rqst_data.h_els.port_id[2];
d31429e1
BK		 1847 case FC_BSG_RPT_ELS:
1848 fc_flags = IBMVFC_FC_ELS;
1849 break;
1850 case FC_BSG_HST_CT:
1851 issue_login = 1;
01e0e15c
JT		 1852 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
1853 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
1854 bsg_request->rqst_data.h_ct.port_id[2];
d31429e1
BK		 1855 case FC_BSG_RPT_CT:
1856 fc_flags = IBMVFC_FC_CT_IU;
1857 break;
1858 default:
1859 return -ENOTSUPP;
f36cfe6a 1860 }
d31429e1
BK		 1861
1862 if (port_id == -1)
1863 return -EINVAL;
1864 if (!mutex_trylock(&vhost->passthru_mutex))
1865 return -EBUSY;
1866
1867 job->dd_data = (void *)port_id;
1868 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1869 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1870
1871 if (!req_seg) {
1872 mutex_unlock(&vhost->passthru_mutex);
1873 return -ENOMEM;
1874 }
1875
1876 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1877 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1878
1879 if (!rsp_seg) {
1880 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1881 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1882 mutex_unlock(&vhost->passthru_mutex);
1883 return -ENOMEM;
1884 }
1885
1886 if (req_seg > 1 || rsp_seg > 1) {
1887 rc = -EINVAL;
1888 goto out;
1889 }
1890
1891 if (issue_login)
1892 rc = ibmvfc_bsg_plogi(vhost, port_id);
1893
1894 spin_lock_irqsave(vhost->host->host_lock, flags);
1895
1896 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1897 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1898 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1899 goto out;
1900 }
1901
1902 evt = ibmvfc_get_event(vhost);
1903 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1904 mad = &evt->iu.passthru;
1905
1906 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 1907 mad->common.version = cpu_to_be32(1);
1908 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1909 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1910
1911 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1912 offsetof(struct ibmvfc_passthru_mad, iu));
1913 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1914
1915 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1916 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1917 mad->iu.flags = cpu_to_be32(fc_flags);
1918 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1919
1920 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1921 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1922 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1923 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1924 mad->iu.scsi_id = cpu_to_be64(port_id);
1925 mad->iu.tag = cpu_to_be64((u64)evt);
1926 rsp_len = be32_to_cpu(mad->iu.rsp.len);
d31429e1
BK		 1927
1928 evt->sync_iu = &rsp_iu;
1929 init_completion(&evt->comp);
1930 rc = ibmvfc_send_event(evt, vhost, 0);
1931 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1932
1933 if (rc) {
1934 rc = -EIO;
1935 goto out;
1936 }
1937
1938 wait_for_completion(&evt->comp);
1939
1940 if (rsp_iu.passthru.common.status)
1941 rc = -EIO;
1942 else
01e0e15c 1943 bsg_reply->reply_payload_rcv_len = rsp_len;
d31429e1
BK		 1944
1945 spin_lock_irqsave(vhost->host->host_lock, flags);
1946 ibmvfc_free_event(evt);
1947 spin_unlock_irqrestore(vhost->host->host_lock, flags);
01e0e15c 1948 bsg_reply->result = rc;
06548160 1949 bsg_job_done(job, bsg_reply->result,
1abaede7 1950 bsg_reply->reply_payload_rcv_len);
d31429e1
BK		 1951 rc = 0;
1952out:
1953 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1954 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1955 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1956 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1957 mutex_unlock(&vhost->passthru_mutex);
1958 LEAVE;
1959 return rc;
1960}
1961
072b91f9
BK		 1962/**
1963 * ibmvfc_reset_device - Reset the device with the specified reset type
1964 * @sdev: scsi device to reset
1965 * @type: reset type
1966 * @desc: reset type description for log messages
1967 *
1968 * Returns:
1969 * 0 on success / other on failure
1970 **/
1971static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1972{
1973 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1974 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1975 struct ibmvfc_cmd *tmf;
50ed9a00 1976 struct ibmvfc_event *evt = NULL;
072b91f9
BK		 1977 union ibmvfc_iu rsp_iu;
1978 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1979 int rsp_rc = -EBUSY;
1980 unsigned long flags;
1981 int rsp_code = 0;
1982
1983 spin_lock_irqsave(vhost->host->host_lock, flags);
1984 if (vhost->state == IBMVFC_ACTIVE) {
1985 evt = ibmvfc_get_event(vhost);
1986 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1987
1988 tmf = &evt->iu.cmd;
1989 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1990 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1991 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1992 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1993 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1994 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1995 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1996 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
072b91f9 1997 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 1998 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
072b91f9
BK		 1999 tmf->iu.tmf_flags = type;
2000 evt->sync_iu = &rsp_iu;
2001
2002 init_completion(&evt->comp);
2003 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2004 }
2005 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2006
2007 if (rsp_rc != 0) {
2008 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2009 desc, rsp_rc);
2010 return -EIO;
2011 }
2012
2013 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2014 wait_for_completion(&evt->comp);
2015
230934a6
BK		 2016 if (rsp_iu.cmd.status)
2017 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2018
2019 if (rsp_code) {
072b91f9
BK		 2020 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2021 rsp_code = fc_rsp->data.info.rsp_code;
2022
2023 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
0aab6c3f
TD		 2024 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2025 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
072b91f9
BK		 2026 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2027 fc_rsp->scsi_status);
2028 rsp_rc = -EIO;
2029 } else
2030 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2031
2032 spin_lock_irqsave(vhost->host->host_lock, flags);
2033 ibmvfc_free_event(evt);
2034 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2035 return rsp_rc;
2036}
2037
2038/**
d2fab5cf
BK		 2039 * ibmvfc_match_rport - Match function for specified remote port
2040 * @evt: ibmvfc event struct
2041 * @device: device to match (rport)
072b91f9
BK		 2042 *
2043 * Returns:
d2fab5cf 2044 * 1 if event matches rport / 0 if event does not match rport
072b91f9 2045 **/
d2fab5cf 2046static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
072b91f9 2047{
d2fab5cf 2048 struct fc_rport *cmd_rport;
072b91f9 2049
d2fab5cf
BK		 2050 if (evt->cmnd) {
2051 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2052 if (cmd_rport == rport)
2053 return 1;
072b91f9 2054 }
d2fab5cf
BK		 2055 return 0;
2056}
072b91f9 2057
d2fab5cf
BK		 2058/**
2059 * ibmvfc_match_target - Match function for specified target
2060 * @evt: ibmvfc event struct
2061 * @device: device to match (starget)
2062 *
2063 * Returns:
2064 * 1 if event matches starget / 0 if event does not match starget
2065 **/
2066static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2067{
2068 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2069 return 1;
2070 return 0;
2071}
072b91f9 2072
d2fab5cf
BK		 2073/**
2074 * ibmvfc_match_lun - Match function for specified LUN
2075 * @evt: ibmvfc event struct
2076 * @device: device to match (sdev)
2077 *
2078 * Returns:
2079 * 1 if event matches sdev / 0 if event does not match sdev
2080 **/
2081static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2082{
2083 if (evt->cmnd && evt->cmnd->device == device)
2084 return 1;
2085 return 0;
2086}
072b91f9 2087
d2fab5cf
BK		 2088/**
2089 * ibmvfc_wait_for_ops - Wait for ops to complete
2090 * @vhost: ibmvfc host struct
2091 * @device: device to match (starget or sdev)
2092 * @match: match function
2093 *
2094 * Returns:
2095 * SUCCESS / FAILED
2096 **/
2097static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2098 int (*match) (struct ibmvfc_event *, void *))
2099{
2100 struct ibmvfc_event *evt;
2101 DECLARE_COMPLETION_ONSTACK(comp);
2102 int wait;
2103 unsigned long flags;
2104 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
072b91f9 2105
d2fab5cf
BK		 2106 ENTER;
2107 do {
2108 wait = 0;
2109 spin_lock_irqsave(vhost->host->host_lock, flags);
2110 list_for_each_entry(evt, &vhost->sent, queue) {
2111 if (match(evt, device)) {
2112 evt->eh_comp = &comp;
2113 wait++;
2114 }
2115 }
2116 spin_unlock_irqrestore(vhost->host->host_lock, flags);
230934a6 2117
d2fab5cf
BK		 2118 if (wait) {
2119 timeout = wait_for_completion_timeout(&comp, timeout);
072b91f9 2120
d2fab5cf
BK		 2121 if (!timeout) {
2122 wait = 0;
2123 spin_lock_irqsave(vhost->host->host_lock, flags);
2124 list_for_each_entry(evt, &vhost->sent, queue) {
2125 if (match(evt, device)) {
2126 evt->eh_comp = NULL;
2127 wait++;
2128 }
2129 }
2130 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2131 if (wait)
2132 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2133 LEAVE;
2134 return wait ? FAILED : SUCCESS;
2135 }
2136 }
2137 } while (wait);
072b91f9 2138
d2fab5cf
BK		 2139 LEAVE;
2140 return SUCCESS;
072b91f9
BK		 2141}
2142
2143/**
2144 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2145 * @sdev: scsi device to cancel commands
2146 * @type: type of error recovery being performed
2147 *
2148 * This sends a cancel to the VIOS for the specified device. This does
2149 * NOT send any abort to the actual device. That must be done separately.
2150 *
2151 * Returns:
2152 * 0 on success / other on failure
2153 **/
2154static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2155{
2156 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 2157 struct scsi_target *starget = scsi_target(sdev);
2158 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 2159 struct ibmvfc_tmf *tmf;
2160 struct ibmvfc_event *evt, *found_evt;
2161 union ibmvfc_iu rsp;
2162 int rsp_rc = -EBUSY;
2163 unsigned long flags;
2164 u16 status;
2165
2166 ENTER;
2167 spin_lock_irqsave(vhost->host->host_lock, flags);
2168 found_evt = NULL;
2169 list_for_each_entry(evt, &vhost->sent, queue) {
2170 if (evt->cmnd && evt->cmnd->device == sdev) {
2171 found_evt = evt;
2172 break;
2173 }
2174 }
2175
2176 if (!found_evt) {
2177 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2178 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2179 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2180 return 0;
2181 }
2182
55d29bf0 2183 if (vhost->logged_in) {
072b91f9
BK		 2184 evt = ibmvfc_get_event(vhost);
2185 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2186
2187 tmf = &evt->iu.tmf;
2188 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2189 tmf->common.version = cpu_to_be32(1);
2190 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2191 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2192 tmf->scsi_id = cpu_to_be64(rport->port_id);
072b91f9 2193 int_to_scsilun(sdev->lun, &tmf->lun);
0aab6c3f 2194 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
90f725db 2195 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
55d29bf0 2196 if (vhost->state == IBMVFC_ACTIVE)
0aab6c3f 2197 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
55d29bf0 2198 else
0aab6c3f
TD		 2199 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2200 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2201 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
072b91f9
BK		 2202
2203 evt->sync_iu = &rsp;
2204 init_completion(&evt->comp);
2205 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2206 }
2207
2208 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2209
2210 if (rsp_rc != 0) {
2211 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
c281e32a
BK		 2212 /* If failure is received, the host adapter is most likely going
2213 through reset, return success so the caller will wait for the command
2214 being cancelled to get returned */
2215 return 0;
072b91f9
BK		 2216 }
2217
2218 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2219
2220 wait_for_completion(&evt->comp);
0aab6c3f 2221 status = be16_to_cpu(rsp.mad_common.status);
072b91f9
BK		 2222 spin_lock_irqsave(vhost->host->host_lock, flags);
2223 ibmvfc_free_event(evt);
2224 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2225
2226 if (status != IBMVFC_MAD_SUCCESS) {
2227 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
c281e32a
BK		 2228 switch (status) {
2229 case IBMVFC_MAD_DRIVER_FAILED:
2230 case IBMVFC_MAD_CRQ_ERROR:
2231 /* Host adapter most likely going through reset, return success to
2232 the caller will wait for the command being cancelled to get returned */
2233 return 0;
2234 default:
2235 return -EIO;
2236 };
072b91f9
BK		 2237 }
2238
2239 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2240 return 0;
2241}
2242
ad8dcffa 2243/**
d2fab5cf 2244 * ibmvfc_match_key - Match function for specified cancel key
ad8dcffa 2245 * @evt: ibmvfc event struct
d2fab5cf 2246 * @key: cancel key to match
ad8dcffa
BK		 2247 *
2248 * Returns:
d2fab5cf 2249 * 1 if event matches key / 0 if event does not match key
ad8dcffa 2250 **/
d2fab5cf 2251static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
ad8dcffa 2252{
d2fab5cf 2253 unsigned long cancel_key = (unsigned long)key;
ad8dcffa 2254
d2fab5cf 2255 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
0aab6c3f 2256 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
ad8dcffa
BK		 2257 return 1;
2258 return 0;
2259}
2260
a077c7fa
BK		 2261/**
2262 * ibmvfc_match_evt - Match function for specified event
2263 * @evt: ibmvfc event struct
2264 * @match: event to match
2265 *
2266 * Returns:
2267 * 1 if event matches key / 0 if event does not match key
2268 **/
2269static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2270{
2271 if (evt == match)
2272 return 1;
2273 return 0;
2274}
2275
ad8dcffa 2276/**
d2fab5cf
BK		 2277 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2278 * @sdev: scsi device to abort commands
2279 *
2280 * This sends an Abort Task Set to the VIOS for the specified device. This does
2281 * NOT send any cancel to the VIOS. That must be done separately.
ad8dcffa
BK		 2282 *
2283 * Returns:
d2fab5cf 2284 * 0 on success / other on failure
ad8dcffa 2285 **/
d2fab5cf 2286static int ibmvfc_abort_task_set(struct scsi_device *sdev)
ad8dcffa 2287{
d2fab5cf
BK		 2288 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2289 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2290 struct ibmvfc_cmd *tmf;
2291 struct ibmvfc_event *evt, *found_evt;
2292 union ibmvfc_iu rsp_iu;
2293 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2294 int rc, rsp_rc = -EBUSY;
2295 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2296 int rsp_code = 0;
ad8dcffa 2297
d2fab5cf
BK		 2298 spin_lock_irqsave(vhost->host->host_lock, flags);
2299 found_evt = NULL;
2300 list_for_each_entry(evt, &vhost->sent, queue) {
2301 if (evt->cmnd && evt->cmnd->device == sdev) {
2302 found_evt = evt;
2303 break;
ad8dcffa 2304 }
d2fab5cf
BK		 2305 }
2306
2307 if (!found_evt) {
2308 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2309 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
ad8dcffa 2310 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2fab5cf
BK		 2311 return 0;
2312 }
ad8dcffa 2313
d2fab5cf
BK		 2314 if (vhost->state == IBMVFC_ACTIVE) {
2315 evt = ibmvfc_get_event(vhost);
2316 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
ad8dcffa 2317
d2fab5cf
BK		 2318 tmf = &evt->iu.cmd;
2319 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2320 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2321 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2322 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2323 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2324 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2325 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2326 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
d2fab5cf 2327 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 2328 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
d2fab5cf
BK		 2329 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2330 evt->sync_iu = &rsp_iu;
2331
2332 init_completion(&evt->comp);
2333 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2334 }
2335
2336 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2337
2338 if (rsp_rc != 0) {
2339 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2340 return -EIO;
2341 }
2342
2343 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2344 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2345
2346 if (!timeout) {
f8804b72 2347 rc = ibmvfc_cancel_all(sdev, 0);
d2fab5cf
BK		 2348 if (!rc) {
2349 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2350 if (rc == SUCCESS)
2351 rc = 0;
ad8dcffa 2352 }
ad8dcffa 2353
d2fab5cf
BK		 2354 if (rc) {
2355 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2356 ibmvfc_reset_host(vhost);
a077c7fa
BK		 2357 rsp_rc = -EIO;
2358 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2359
2360 if (rc == SUCCESS)
2361 rsp_rc = 0;
2362
2363 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2364 if (rc != SUCCESS) {
2365 spin_lock_irqsave(vhost->host->host_lock, flags);
2366 ibmvfc_hard_reset_host(vhost);
2367 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2368 rsp_rc = 0;
2369 }
2370
d2fab5cf
BK		 2371 goto out;
2372 }
2373 }
2374
2375 if (rsp_iu.cmd.status)
2376 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2377
2378 if (rsp_code) {
2379 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2380 rsp_code = fc_rsp->data.info.rsp_code;
2381
2382 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2383 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
0aab6c3f 2384 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
d2fab5cf
BK		 2385 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2386 fc_rsp->scsi_status);
2387 rsp_rc = -EIO;
2388 } else
2389 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2390
2391out:
2392 spin_lock_irqsave(vhost->host->host_lock, flags);
2393 ibmvfc_free_event(evt);
2394 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2395 return rsp_rc;
ad8dcffa
BK		 2396}
2397
072b91f9
BK		 2398/**
2399 * ibmvfc_eh_abort_handler - Abort a command
2400 * @cmd: scsi command to abort
2401 *
2402 * Returns:
93631b4a 2403 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2404 **/
2405static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2406{
ad8dcffa
BK		 2407 struct scsi_device *sdev = cmd->device;
2408 struct ibmvfc_host *vhost = shost_priv(sdev->host);
55d29bf0 2409 int cancel_rc, block_rc;
ad8dcffa 2410 int rc = FAILED;
072b91f9
BK		 2411
2412 ENTER;
93631b4a 2413 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2414 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2415 if (block_rc != FAST_IO_FAIL) {
2416 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
55d29bf0 2417 ibmvfc_abort_task_set(sdev);
93631b4a 2418 } else
90f725db 2419 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2420
55d29bf0 2421 if (!cancel_rc)
ad8dcffa 2422 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2423
93631b4a
BK		 2424 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2425 rc = FAST_IO_FAIL;
2426
072b91f9 2427 LEAVE;
ad8dcffa 2428 return rc;
072b91f9
BK		 2429}
2430
2431/**
2432 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2433 * @cmd: scsi command struct
2434 *
2435 * Returns:
93631b4a 2436 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2437 **/
2438static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2439{
ad8dcffa
BK		 2440 struct scsi_device *sdev = cmd->device;
2441 struct ibmvfc_host *vhost = shost_priv(sdev->host);
93631b4a 2442 int cancel_rc, block_rc, reset_rc = 0;
ad8dcffa 2443 int rc = FAILED;
072b91f9
BK		 2444
2445 ENTER;
93631b4a 2446 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2447 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2448 if (block_rc != FAST_IO_FAIL) {
2449 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2450 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2451 } else
90f725db 2452 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2453
ad8dcffa
BK		 2454 if (!cancel_rc && !reset_rc)
2455 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2456
93631b4a
BK		 2457 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2458 rc = FAST_IO_FAIL;
2459
072b91f9 2460 LEAVE;
ad8dcffa 2461 return rc;
072b91f9
BK		 2462}
2463
93631b4a
BK		 2464/**
2465 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2466 * @sdev: scsi device struct
2467 * @data: return code
2468 *
2469 **/
2470static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2471{
2472 unsigned long *rc = data;
90f725db 2473 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
93631b4a
BK		 2474}
2475
4a5c4a5e
BK		 2476/**
2477 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2478 * @sdev: scsi device struct
2479 * @data: return code
2480 *
2481 **/
2482static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
072b91f9
BK		 2483{
2484 unsigned long *rc = data;
2485 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2486}
2487
072b91f9
BK		 2488/**
2489 * ibmvfc_eh_target_reset_handler - Reset the target
2490 * @cmd: scsi command struct
2491 *
2492 * Returns:
93631b4a 2493 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2494 **/
2495static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2496{
ad8dcffa
BK		 2497 struct scsi_device *sdev = cmd->device;
2498 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2499 struct scsi_target *starget = scsi_target(sdev);
93631b4a
BK		 2500 int block_rc;
2501 int reset_rc = 0;
ad8dcffa 2502 int rc = FAILED;
072b91f9 2503 unsigned long cancel_rc = 0;
072b91f9
BK		 2504
2505 ENTER;
93631b4a 2506 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2507 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2508 if (block_rc != FAST_IO_FAIL) {
2509 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2510 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2511 } else
2512 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
072b91f9 2513
ad8dcffa
BK		 2514 if (!cancel_rc && !reset_rc)
2515 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9 2516
93631b4a
BK		 2517 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2518 rc = FAST_IO_FAIL;
2519
072b91f9 2520 LEAVE;
ad8dcffa 2521 return rc;
072b91f9
BK		 2522}
2523
2524/**
2525 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2526 * @cmd: struct scsi_cmnd having problems
2527 *
2528 **/
2529static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2530{
8d8a3f59 2531 int rc;
072b91f9
BK		 2532 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2533
2534 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2535 rc = ibmvfc_issue_fc_host_lip(vhost->host);
93631b4a 2536
072b91f9
BK		 2537 return rc ? FAILED : SUCCESS;
2538}
2539
2540/**
2541 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2542 * @rport: rport struct
2543 *
2544 * Return value:
2545 * none
2546 **/
2547static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2548{
d2fab5cf 2549 struct Scsi_Host *shost = rport_to_shost(rport);
072b91f9 2550 struct ibmvfc_host *vhost = shost_priv(shost);
d2fab5cf
BK		 2551 struct fc_rport *dev_rport;
2552 struct scsi_device *sdev;
2553 unsigned long rc;
072b91f9
BK		 2554
2555 ENTER;
d2fab5cf
BK		 2556 shost_for_each_device(sdev, shost) {
2557 dev_rport = starget_to_rport(scsi_target(sdev));
2558 if (dev_rport != rport)
2559 continue;
90f725db 2560 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
d2fab5cf 2561 }
072b91f9 2562
d2fab5cf 2563 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
ad8dcffa
BK		 2564
2565 if (rc == FAILED)
072b91f9 2566 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2567 LEAVE;
2568}
2569
d99e5f48 2570static const struct ibmvfc_async_desc ae_desc [] = {
402c6eec
RJ		 2571 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2572 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2573 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2574 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2575 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2576 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2577 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2578 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2579 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2580 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2581 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2582 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2583 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
072b91f9
BK		 2584};
2585
d99e5f48 2586static const struct ibmvfc_async_desc unknown_ae = {
402c6eec 2587 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
d99e5f48 2588};
072b91f9
BK		 2589
2590/**
2591 * ibmvfc_get_ae_desc - Get text description for async event
2592 * @ae: async event
2593 *
2594 **/
d99e5f48 2595static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
072b91f9
BK		 2596{
2597 int i;
2598
2599 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2600 if (ae_desc[i].ae == ae)
d99e5f48
BK		 2601 return &ae_desc[i];
2602
2603 return &unknown_ae;
2604}
2605
2606static const struct {
2607 enum ibmvfc_ae_link_state state;
2608 const char *desc;
2609} link_desc [] = {
2610 { IBMVFC_AE_LS_LINK_UP, " link up" },
2611 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2612 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2613 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2614};
2615
2616/**
2617 * ibmvfc_get_link_state - Get text description for link state
2618 * @state: link state
2619 *
2620 **/
2621static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2622{
2623 int i;
2624
2625 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2626 if (link_desc[i].state == state)
2627 return link_desc[i].desc;
072b91f9 2628
d99e5f48 2629 return "";
072b91f9
BK		 2630}
2631
2632/**
2633 * ibmvfc_handle_async - Handle an async event from the adapter
2634 * @crq: crq to process
2635 * @vhost: ibmvfc host struct
2636 *
2637 **/
2638static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2639 struct ibmvfc_host *vhost)
2640{
0aab6c3f 2641 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
6d29cc56 2642 struct ibmvfc_target *tgt;
072b91f9 2643
d99e5f48 2644 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
21367e20
TD		 2645 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2646 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
d99e5f48 2647 ibmvfc_get_link_state(crq->link_state));
072b91f9 2648
0aab6c3f 2649 switch (be64_to_cpu(crq->event)) {
072b91f9 2650 case IBMVFC_AE_RESUME:
497f9c50
BK		 2651 switch (crq->link_state) {
2652 case IBMVFC_AE_LS_LINK_DOWN:
2653 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2654 break;
2655 case IBMVFC_AE_LS_LINK_DEAD:
2656 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2657 break;
2658 case IBMVFC_AE_LS_LINK_UP:
2659 case IBMVFC_AE_LS_LINK_BOUNCED:
2660 default:
2661 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2662 vhost->delay_init = 1;
2663 __ibmvfc_reset_host(vhost);
2664 break;
f36cfe6a 2665 }
497f9c50
BK		 2666
2667 break;
2668 case IBMVFC_AE_LINK_UP:
072b91f9 2669 vhost->events_to_log |= IBMVFC_AE_LINKUP;
d2131b33
BK		 2670 vhost->delay_init = 1;
2671 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2672 break;
2673 case IBMVFC_AE_SCN_FABRIC:
d2131b33 2674 case IBMVFC_AE_SCN_DOMAIN:
072b91f9 2675 vhost->events_to_log |= IBMVFC_AE_RSCN;
5cdf1626
BK		 2676 if (vhost->state < IBMVFC_HALTED) {
2677 vhost->delay_init = 1;
2678 __ibmvfc_reset_host(vhost);
2679 }
072b91f9
BK		 2680 break;
2681 case IBMVFC_AE_SCN_NPORT:
2682 case IBMVFC_AE_SCN_GROUP:
072b91f9 2683 vhost->events_to_log |= IBMVFC_AE_RSCN;
6d29cc56
BK		 2684 ibmvfc_reinit_host(vhost);
2685 break;
072b91f9
BK		 2686 case IBMVFC_AE_ELS_LOGO:
2687 case IBMVFC_AE_ELS_PRLO:
2688 case IBMVFC_AE_ELS_PLOGI:
6d29cc56
BK		 2689 list_for_each_entry(tgt, &vhost->targets, queue) {
2690 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2691 break;
0aab6c3f 2692 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
6d29cc56 2693 continue;
0aab6c3f 2694 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
6d29cc56 2695 continue;
0aab6c3f 2696 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
6d29cc56 2697 continue;
0aab6c3f 2698 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
017b2ae3 2699 tgt->logo_rcvd = 1;
0aab6c3f 2700 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
017b2ae3
BK		 2701 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2702 ibmvfc_reinit_host(vhost);
2703 }
6d29cc56 2704 }
072b91f9
BK		 2705 break;
2706 case IBMVFC_AE_LINK_DOWN:
2707 case IBMVFC_AE_ADAPTER_FAILED:
2708 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2709 break;
2710 case IBMVFC_AE_LINK_DEAD:
2711 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2712 break;
2713 case IBMVFC_AE_HALT:
2714 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2715 break;
2716 default:
775a42ec 2717 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
072b91f9 2718 break;
f36cfe6a 2719 }
072b91f9
BK		 2720}
2721
2722/**
2723 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2724 * @crq: Command/Response queue
2725 * @vhost: ibmvfc host struct
2726 *
2727 **/
2728static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2729{
2730 long rc;
0aab6c3f 2731 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
072b91f9
BK		 2732
2733 switch (crq->valid) {
2734 case IBMVFC_CRQ_INIT_RSP:
2735 switch (crq->format) {
2736 case IBMVFC_CRQ_INIT:
2737 dev_info(vhost->dev, "Partner initialized\n");
2738 /* Send back a response */
2739 rc = ibmvfc_send_crq_init_complete(vhost);
2740 if (rc == 0)
861890c6 2741 ibmvfc_init_host(vhost);
072b91f9
BK		 2742 else
2743 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2744 break;
2745 case IBMVFC_CRQ_INIT_COMPLETE:
2746 dev_info(vhost->dev, "Partner initialization complete\n");
861890c6 2747 ibmvfc_init_host(vhost);
072b91f9
BK		 2748 break;
2749 default:
2750 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2751 }
2752 return;
2753 case IBMVFC_CRQ_XPORT_EVENT:
2754 vhost->state = IBMVFC_NO_CRQ;
79111d08 2755 vhost->logged_in = 0;
072b91f9
BK		 2756 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2757 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2758 /* We need to re-setup the interpartition connection */
2759 dev_info(vhost->dev, "Re-enabling adapter\n");
2760 vhost->client_migrated = 1;
2761 ibmvfc_purge_requests(vhost, DID_REQUEUE);
73ee5d86
BK		 2762 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2763 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
072b91f9
BK		 2764 } else {
2765 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
072b91f9 2766 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 2767 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2768 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
072b91f9
BK		 2769 }
2770 return;
2771 case IBMVFC_CRQ_CMD_RSP:
2772 break;
2773 default:
2774 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2775 return;
2776 }
2777
2778 if (crq->format == IBMVFC_ASYNC_EVENT)
2779 return;
2780
2781 /* The only kind of payload CRQs we should get are responses to
2782 * things we send. Make sure this response is to something we
2783 * actually sent
2784 */
2785 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
775a42ec 2786 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
072b91f9
BK		 2787 crq->ioba);
2788 return;
2789 }
2790
2791 if (unlikely(atomic_read(&evt->free))) {
775a42ec 2792 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
072b91f9
BK		 2793 crq->ioba);
2794 return;
2795 }
2796
2797 del_timer(&evt->timer);
2798 list_del(&evt->queue);
2799 ibmvfc_trc_end(evt);
2800 evt->done(evt);
2801}
2802
2803/**
2804 * ibmvfc_scan_finished - Check if the device scan is done.
2805 * @shost: scsi host struct
2806 * @time: current elapsed time
2807 *
2808 * Returns:
2809 * 0 if scan is not done / 1 if scan is done
2810 **/
2811static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2812{
2813 unsigned long flags;
2814 struct ibmvfc_host *vhost = shost_priv(shost);
2815 int done = 0;
2816
2817 spin_lock_irqsave(shost->host_lock, flags);
2818 if (time >= (init_timeout * HZ)) {
2819 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2820 "continuing initialization\n", init_timeout);
2821 done = 1;
2822 }
2823
43c8da90 2824 if (vhost->scan_complete)
072b91f9
BK		 2825 done = 1;
2826 spin_unlock_irqrestore(shost->host_lock, flags);
2827 return done;
2828}
2829
2830/**
2831 * ibmvfc_slave_alloc - Setup the device's task set value
2832 * @sdev: struct scsi_device device to configure
2833 *
2834 * Set the device's task set value so that error handling works as
2835 * expected.
2836 *
2837 * Returns:
2838 * 0 on success / -ENXIO if device does not exist
2839 **/
2840static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2841{
2842 struct Scsi_Host *shost = sdev->host;
2843 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2844 struct ibmvfc_host *vhost = shost_priv(shost);
2845 unsigned long flags = 0;
2846
2847 if (!rport || fc_remote_port_chkready(rport))
2848 return -ENXIO;
2849
2850 spin_lock_irqsave(shost->host_lock, flags);
2851 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2852 spin_unlock_irqrestore(shost->host_lock, flags);
2853 return 0;
2854}
2855
ad8dcffa
BK		 2856/**
2857 * ibmvfc_target_alloc - Setup the target's task set value
2858 * @starget: struct scsi_target
2859 *
2860 * Set the target's task set value so that error handling works as
2861 * expected.
2862 *
2863 * Returns:
2864 * 0 on success / -ENXIO if device does not exist
2865 **/
2866static int ibmvfc_target_alloc(struct scsi_target *starget)
2867{
2868 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2869 struct ibmvfc_host *vhost = shost_priv(shost);
2870 unsigned long flags = 0;
2871
2872 spin_lock_irqsave(shost->host_lock, flags);
2873 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2874 spin_unlock_irqrestore(shost->host_lock, flags);
2875 return 0;
2876}
2877
072b91f9
BK		 2878/**
2879 * ibmvfc_slave_configure - Configure the device
2880 * @sdev: struct scsi_device device to configure
2881 *
2882 * Enable allow_restart for a device if it is a disk. Adjust the
2883 * queue_depth here also.
2884 *
2885 * Returns:
2886 * 0
2887 **/
2888static int ibmvfc_slave_configure(struct scsi_device *sdev)
2889{
2890 struct Scsi_Host *shost = sdev->host;
072b91f9
BK		 2891 unsigned long flags = 0;
2892
2893 spin_lock_irqsave(shost->host_lock, flags);
2894 if (sdev->type == TYPE_DISK)
2895 sdev->allow_restart = 1;
072b91f9
BK		 2896 spin_unlock_irqrestore(shost->host_lock, flags);
2897 return 0;
2898}
2899
2900/**
2901 * ibmvfc_change_queue_depth - Change the device's queue depth
2902 * @sdev: scsi device struct
2903 * @qdepth: depth to set
e881a172 2904 * @reason: calling context
072b91f9
BK		 2905 *
2906 * Return value:
2907 * actual depth set
2908 **/
db5ed4df 2909static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
072b91f9
BK		 2910{
2911 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2912 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2913
db5ed4df 2914 return scsi_change_queue_depth(sdev, qdepth);
072b91f9
BK		 2915}
2916
072b91f9
BK		 2917static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2918 struct device_attribute *attr, char *buf)
2919{
2920 struct Scsi_Host *shost = class_to_shost(dev);
2921 struct ibmvfc_host *vhost = shost_priv(shost);
2922
2923 return snprintf(buf, PAGE_SIZE, "%s\n",
2924 vhost->login_buf->resp.partition_name);
2925}
2926
072b91f9
BK		 2927static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2928 struct device_attribute *attr, char *buf)
2929{
2930 struct Scsi_Host *shost = class_to_shost(dev);
2931 struct ibmvfc_host *vhost = shost_priv(shost);
2932
2933 return snprintf(buf, PAGE_SIZE, "%s\n",
2934 vhost->login_buf->resp.device_name);
2935}
2936
072b91f9
BK		 2937static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2938 struct device_attribute *attr, char *buf)
2939{
2940 struct Scsi_Host *shost = class_to_shost(dev);
2941 struct ibmvfc_host *vhost = shost_priv(shost);
2942
2943 return snprintf(buf, PAGE_SIZE, "%s\n",
2944 vhost->login_buf->resp.port_loc_code);
2945}
2946
072b91f9
BK		 2947static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2948 struct device_attribute *attr, char *buf)
2949{
2950 struct Scsi_Host *shost = class_to_shost(dev);
2951 struct ibmvfc_host *vhost = shost_priv(shost);
2952
2953 return snprintf(buf, PAGE_SIZE, "%s\n",
2954 vhost->login_buf->resp.drc_name);
2955}
2956
072b91f9
BK		 2957static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2958 struct device_attribute *attr, char *buf)
2959{
2960 struct Scsi_Host *shost = class_to_shost(dev);
2961 struct ibmvfc_host *vhost = shost_priv(shost);
2962 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2963}
2964
497f9c50
BK		 2965static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2966 struct device_attribute *attr, char *buf)
2967{
2968 struct Scsi_Host *shost = class_to_shost(dev);
2969 struct ibmvfc_host *vhost = shost_priv(shost);
2970 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2971}
2972
072b91f9
BK		 2973/**
2974 * ibmvfc_show_log_level - Show the adapter's error logging level
2975 * @dev: class device struct
2976 * @buf: buffer
2977 *
2978 * Return value:
2979 * number of bytes printed to buffer
2980 **/
2981static ssize_t ibmvfc_show_log_level(struct device *dev,
2982 struct device_attribute *attr, char *buf)
2983{
2984 struct Scsi_Host *shost = class_to_shost(dev);
2985 struct ibmvfc_host *vhost = shost_priv(shost);
2986 unsigned long flags = 0;
2987 int len;
2988
2989 spin_lock_irqsave(shost->host_lock, flags);
2990 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2991 spin_unlock_irqrestore(shost->host_lock, flags);
2992 return len;
2993}
2994
2995/**
2996 * ibmvfc_store_log_level - Change the adapter's error logging level
2997 * @dev: class device struct
2998 * @buf: buffer
2999 *
3000 * Return value:
3001 * number of bytes printed to buffer
3002 **/
3003static ssize_t ibmvfc_store_log_level(struct device *dev,
3004 struct device_attribute *attr,
3005 const char *buf, size_t count)
3006{
3007 struct Scsi_Host *shost = class_to_shost(dev);
3008 struct ibmvfc_host *vhost = shost_priv(shost);
3009 unsigned long flags = 0;
3010
3011 spin_lock_irqsave(shost->host_lock, flags);
3012 vhost->log_level = simple_strtoul(buf, NULL, 10);
3013 spin_unlock_irqrestore(shost->host_lock, flags);
3014 return strlen(buf);
3015}
3016
85e2399e
BK		 3017static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3018static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3019static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3020static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3021static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
497f9c50 3022static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
85e2399e
BK		 3023static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3024 ibmvfc_show_log_level, ibmvfc_store_log_level);
072b91f9
BK		 3025
3026#ifdef CONFIG_SCSI_IBMVFC_TRACE
3027/**
3028 * ibmvfc_read_trace - Dump the adapter trace
2c3c8bea 3029 * @filp: open sysfs file
072b91f9
BK		 3030 * @kobj: kobject struct
3031 * @bin_attr: bin_attribute struct
3032 * @buf: buffer
3033 * @off: offset
3034 * @count: buffer size
3035 *
3036 * Return value:
3037 * number of bytes printed to buffer
3038 **/
2c3c8bea 3039static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
072b91f9
BK		 3040 struct bin_attribute *bin_attr,
3041 char *buf, loff_t off, size_t count)
3042{
3043 struct device *dev = container_of(kobj, struct device, kobj);
3044 struct Scsi_Host *shost = class_to_shost(dev);
3045 struct ibmvfc_host *vhost = shost_priv(shost);
3046 unsigned long flags = 0;
3047 int size = IBMVFC_TRACE_SIZE;
3048 char *src = (char *)vhost->trace;
3049
3050 if (off > size)
3051 return 0;
3052 if (off + count > size) {
3053 size -= off;
3054 count = size;
3055 }
3056
3057 spin_lock_irqsave(shost->host_lock, flags);
3058 memcpy(buf, &src[off], count);
3059 spin_unlock_irqrestore(shost->host_lock, flags);
3060 return count;
3061}
3062
3063static struct bin_attribute ibmvfc_trace_attr = {
3064 .attr = {
3065 .name = "trace",
3066 .mode = S_IRUGO,
3067 },
3068 .size = 0,
3069 .read = ibmvfc_read_trace,
3070};
3071#endif
3072
3073static struct device_attribute *ibmvfc_attrs[] = {
85e2399e
BK		 3074 &dev_attr_partition_name,
3075 &dev_attr_device_name,
3076 &dev_attr_port_loc_code,
3077 &dev_attr_drc_name,
3078 &dev_attr_npiv_version,
497f9c50 3079 &dev_attr_capabilities,
85e2399e 3080 &dev_attr_log_level,
072b91f9
BK		 3081 NULL
3082};
3083
3084static struct scsi_host_template driver_template = {
3085 .module = THIS_MODULE,
3086 .name = "IBM POWER Virtual FC Adapter",
3087 .proc_name = IBMVFC_NAME,
3088 .queuecommand = ibmvfc_queuecommand,
b6a05c82 3089 .eh_timed_out = fc_eh_timed_out,
072b91f9
BK		 3090 .eh_abort_handler = ibmvfc_eh_abort_handler,
3091 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3092 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3093 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3094 .slave_alloc = ibmvfc_slave_alloc,
3095 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 3096 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 3097 .scan_finished = ibmvfc_scan_finished,
3098 .change_queue_depth = ibmvfc_change_queue_depth,
072b91f9
BK		 3099 .cmd_per_lun = 16,
3100 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3101 .this_id = -1,
3102 .sg_tablesize = SG_ALL,
3103 .max_sectors = IBMVFC_MAX_SECTORS,
072b91f9 3104 .shost_attrs = ibmvfc_attrs,
c40ecc12 3105 .track_queue_depth = 1,
072b91f9
BK		 3106};
3107
3108/**
3109 * ibmvfc_next_async_crq - Returns the next entry in async queue
3110 * @vhost: ibmvfc host struct
3111 *
3112 * Returns:
3113 * Pointer to next entry in queue / NULL if empty
3114 **/
3115static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3116{
3117 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3118 struct ibmvfc_async_crq *crq;
3119
3120 crq = &async_crq->msgs[async_crq->cur];
3121 if (crq->valid & 0x80) {
3122 if (++async_crq->cur == async_crq->size)
3123 async_crq->cur = 0;
f5832fa2 3124 rmb();
072b91f9
BK		 3125 } else
3126 crq = NULL;
3127
3128 return crq;
3129}
3130
3131/**
3132 * ibmvfc_next_crq - Returns the next entry in message queue
3133 * @vhost: ibmvfc host struct
3134 *
3135 * Returns:
3136 * Pointer to next entry in queue / NULL if empty
3137 **/
3138static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3139{
3140 struct ibmvfc_crq_queue *queue = &vhost->crq;
3141 struct ibmvfc_crq *crq;
3142
3143 crq = &queue->msgs[queue->cur];
3144 if (crq->valid & 0x80) {
3145 if (++queue->cur == queue->size)
3146 queue->cur = 0;
f5832fa2 3147 rmb();
072b91f9
BK		 3148 } else
3149 crq = NULL;
3150
3151 return crq;
3152}
3153
3154/**
3155 * ibmvfc_interrupt - Interrupt handler
3156 * @irq: number of irq to handle, not used
3157 * @dev_instance: ibmvfc_host that received interrupt
3158 *
3159 * Returns:
3160 * IRQ_HANDLED
3161 **/
3162static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3163{
3164 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
039a0898
BK		 3165 unsigned long flags;
3166
3167 spin_lock_irqsave(vhost->host->host_lock, flags);
3168 vio_disable_interrupts(to_vio_dev(vhost->dev));
3169 tasklet_schedule(&vhost->tasklet);
3170 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3171 return IRQ_HANDLED;
3172}
3173
3174/**
3175 * ibmvfc_tasklet - Interrupt handler tasklet
3176 * @data: ibmvfc host struct
3177 *
3178 * Returns:
3179 * Nothing
3180 **/
3181static void ibmvfc_tasklet(void *data)
3182{
3183 struct ibmvfc_host *vhost = data;
072b91f9
BK		 3184 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3185 struct ibmvfc_crq *crq;
3186 struct ibmvfc_async_crq *async;
3187 unsigned long flags;
3188 int done = 0;
3189
3190 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 3191 while (!done) {
072b91f9
BK		 3192 /* Pull all the valid messages off the async CRQ */
3193 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3194 ibmvfc_handle_async(async, vhost);
3195 async->valid = 0;
f5832fa2 3196 wmb();
072b91f9
BK		 3197 }
3198
f1d7fb7a
BK		 3199 /* Pull all the valid messages off the CRQ */
3200 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
072b91f9
BK		 3201 ibmvfc_handle_crq(crq, vhost);
3202 crq->valid = 0;
f5832fa2 3203 wmb();
f1d7fb7a
BK		 3204 }
3205
3206 vio_enable_interrupts(vdev);
3207 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
072b91f9
BK		 3208 vio_disable_interrupts(vdev);
3209 ibmvfc_handle_async(async, vhost);
4081b77c 3210 async->valid = 0;
f5832fa2 3211 wmb();
f1d7fb7a
BK		 3212 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3213 vio_disable_interrupts(vdev);
3214 ibmvfc_handle_crq(crq, vhost);
3215 crq->valid = 0;
f5832fa2 3216 wmb();
072b91f9
BK		 3217 } else
3218 done = 1;
3219 }
3220
3221 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 3222}
3223
3224/**
3225 * ibmvfc_init_tgt - Set the next init job step for the target
3226 * @tgt: ibmvfc target struct
3227 * @job_step: job step to perform
3228 *
3229 **/
3230static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3231 void (*job_step) (struct ibmvfc_target *))
3232{
3233 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3234 tgt->job_step = job_step;
3235 wake_up(&tgt->vhost->work_wait_q);
3236}
3237
3238/**
3239 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3240 * @tgt: ibmvfc target struct
3241 * @job_step: initialization job step
3242 *
7d0e4622
BK		 3243 * Returns: 1 if step will be retried / 0 if not
3244 *
072b91f9 3245 **/
7d0e4622 3246static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
072b91f9
BK		 3247 void (*job_step) (struct ibmvfc_target *))
3248{
1c41fa82 3249 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
072b91f9
BK		 3250 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3251 wake_up(&tgt->vhost->work_wait_q);
7d0e4622 3252 return 0;
072b91f9
BK		 3253 } else
3254 ibmvfc_init_tgt(tgt, job_step);
7d0e4622 3255 return 1;
072b91f9
BK		 3256}
3257
a3b7aeab
BK		 3258/* Defined in FC-LS */
3259static const struct {
3260 int code;
3261 int retry;
3262 int logged_in;
3263} prli_rsp [] = {
3264 { 0, 1, 0 },
3265 { 1, 0, 1 },
3266 { 2, 1, 0 },
3267 { 3, 1, 0 },
3268 { 4, 0, 0 },
3269 { 5, 0, 0 },
3270 { 6, 0, 1 },
3271 { 7, 0, 0 },
3272 { 8, 1, 0 },
3273};
3274
3275/**
3276 * ibmvfc_get_prli_rsp - Find PRLI response index
3277 * @flags: PRLI response flags
3278 *
3279 **/
3280static int ibmvfc_get_prli_rsp(u16 flags)
3281{
3282 int i;
3283 int code = (flags & 0x0f00) >> 8;
3284
3285 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3286 if (prli_rsp[i].code == code)
3287 return i;
3288
3289 return 0;
3290}
3291
072b91f9
BK		 3292/**
3293 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3294 * @evt: ibmvfc event struct
3295 *
3296 **/
3297static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3298{
3299 struct ibmvfc_target *tgt = evt->tgt;
3300 struct ibmvfc_host *vhost = evt->vhost;
3301 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
a3b7aeab 3302 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
0aab6c3f 3303 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3304 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3305
3306 vhost->discovery_threads--;
3307 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3308 switch (status) {
3309 case IBMVFC_MAD_SUCCESS:
a3b7aeab
BK		 3310 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3311 parms->type, parms->flags, parms->service_parms);
3312
3313 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
0aab6c3f 3314 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
a3b7aeab 3315 if (prli_rsp[index].logged_in) {
0aab6c3f 3316 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
a3b7aeab
BK		 3317 tgt->need_login = 0;
3318 tgt->ids.roles = 0;
0aab6c3f 3319 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
a3b7aeab 3320 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
0aab6c3f 3321 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
a3b7aeab 3322 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
43c8da90 3323 tgt->add_rport = 1;
a3b7aeab
BK		 3324 } else
3325 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3326 } else if (prli_rsp[index].retry)
3327 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3328 else
3329 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3330 } else
3331 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 3332 break;
3333 case IBMVFC_MAD_DRIVER_FAILED:
3334 break;
3335 case IBMVFC_MAD_CRQ_ERROR:
3336 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3337 break;
3338 case IBMVFC_MAD_FAILED:
3339 default:
0aab6c3f
TD		 3340 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3341 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
017b2ae3
BK		 3342 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3343 else if (tgt->logo_rcvd)
3344 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
0aab6c3f 3345 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3346 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499
BK		 3347 else
3348 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3349
3350 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
0aab6c3f 3351 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
7d0e4622 3352 rsp->status, rsp->error, status);
072b91f9 3353 break;
f36cfe6a 3354 }
072b91f9
BK		 3355
3356 kref_put(&tgt->kref, ibmvfc_release_tgt);
3357 ibmvfc_free_event(evt);
3358 wake_up(&vhost->work_wait_q);
3359}
3360
3361/**
3362 * ibmvfc_tgt_send_prli - Send a process login
3363 * @tgt: ibmvfc target struct
3364 *
3365 **/
3366static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3367{
3368 struct ibmvfc_process_login *prli;
3369 struct ibmvfc_host *vhost = tgt->vhost;
3370 struct ibmvfc_event *evt;
3371
3372 if (vhost->discovery_threads >= disc_threads)
3373 return;
3374
3375 kref_get(&tgt->kref);
3376 evt = ibmvfc_get_event(vhost);
3377 vhost->discovery_threads++;
3378 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3379 evt->tgt = tgt;
3380 prli = &evt->iu.prli;
3381 memset(prli, 0, sizeof(*prli));
0aab6c3f
TD		 3382 prli->common.version = cpu_to_be32(1);
3383 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3384 prli->common.length = cpu_to_be16(sizeof(*prli));
3385 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3386
3387 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
0aab6c3f
TD		 3388 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3389 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
bb5a5054 3390 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
072b91f9 3391
a6104b1e
TD		 3392 if (cls3_error)
3393 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3394
072b91f9
BK		 3395 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3396 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3397 vhost->discovery_threads--;
3398 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3399 kref_put(&tgt->kref, ibmvfc_release_tgt);
3400 } else
3401 tgt_dbg(tgt, "Sent process login\n");
3402}
3403
3404/**
3405 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3406 * @evt: ibmvfc event struct
3407 *
3408 **/
3409static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3410{
3411 struct ibmvfc_target *tgt = evt->tgt;
3412 struct ibmvfc_host *vhost = evt->vhost;
3413 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
0aab6c3f 3414 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3415 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3416
3417 vhost->discovery_threads--;
3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3419 switch (status) {
3420 case IBMVFC_MAD_SUCCESS:
3421 tgt_dbg(tgt, "Port Login succeeded\n");
3422 if (tgt->ids.port_name &&
3423 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3424 vhost->reinit = 1;
3425 tgt_dbg(tgt, "Port re-init required\n");
3426 break;
3427 }
3428 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3429 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3430 tgt->ids.port_id = tgt->scsi_id;
072b91f9
BK		 3431 memcpy(&tgt->service_parms, &rsp->service_parms,
3432 sizeof(tgt->service_parms));
3433 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3434 sizeof(tgt->service_parms_change));
3435 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3436 break;
3437 case IBMVFC_MAD_DRIVER_FAILED:
3438 break;
3439 case IBMVFC_MAD_CRQ_ERROR:
3440 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3441 break;
3442 case IBMVFC_MAD_FAILED:
3443 default:
0aab6c3f 3444 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3445 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499
BK		 3446 else
3447 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3448
3449 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f
TD		 3450 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error,
3451 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type,
3452 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status);
072b91f9 3453 break;
f36cfe6a 3454 }
072b91f9
BK		 3455
3456 kref_put(&tgt->kref, ibmvfc_release_tgt);
3457 ibmvfc_free_event(evt);
3458 wake_up(&vhost->work_wait_q);
3459}
3460
3461/**
3462 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3463 * @tgt: ibmvfc target struct
3464 *
3465 **/
3466static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3467{
3468 struct ibmvfc_port_login *plogi;
3469 struct ibmvfc_host *vhost = tgt->vhost;
3470 struct ibmvfc_event *evt;
3471
3472 if (vhost->discovery_threads >= disc_threads)
3473 return;
3474
3475 kref_get(&tgt->kref);
017b2ae3 3476 tgt->logo_rcvd = 0;
072b91f9
BK		 3477 evt = ibmvfc_get_event(vhost);
3478 vhost->discovery_threads++;
3479 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3480 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3481 evt->tgt = tgt;
3482 plogi = &evt->iu.plogi;
3483 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 3484 plogi->common.version = cpu_to_be32(1);
3485 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3486 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3487 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3488
3489 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3490 vhost->discovery_threads--;
3491 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3492 kref_put(&tgt->kref, ibmvfc_release_tgt);
3493 } else
3494 tgt_dbg(tgt, "Sent port login\n");
3495}
3496
3497/**
3498 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3499 * @evt: ibmvfc event struct
3500 *
3501 **/
3502static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3503{
3504 struct ibmvfc_target *tgt = evt->tgt;
3505 struct ibmvfc_host *vhost = evt->vhost;
3506 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
0aab6c3f 3507 u32 status = be16_to_cpu(rsp->common.status);
072b91f9
BK		 3508
3509 vhost->discovery_threads--;
3510 ibmvfc_free_event(evt);
3511 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3512
3513 switch (status) {
3514 case IBMVFC_MAD_SUCCESS:
3515 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3516 break;
3517 case IBMVFC_MAD_DRIVER_FAILED:
3518 kref_put(&tgt->kref, ibmvfc_release_tgt);
3519 wake_up(&vhost->work_wait_q);
3520 return;
3521 case IBMVFC_MAD_FAILED:
3522 default:
3523 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3524 break;
f36cfe6a 3525 }
072b91f9
BK		 3526
3527 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3528 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3529 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3530 tgt->scsi_id != tgt->new_scsi_id)
3531 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3532 kref_put(&tgt->kref, ibmvfc_release_tgt);
3533 wake_up(&vhost->work_wait_q);
3534}
3535
3536/**
3537 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3538 * @tgt: ibmvfc target struct
3539 *
3540 **/
3541static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3542{
3543 struct ibmvfc_implicit_logout *mad;
3544 struct ibmvfc_host *vhost = tgt->vhost;
3545 struct ibmvfc_event *evt;
3546
3547 if (vhost->discovery_threads >= disc_threads)
3548 return;
3549
3550 kref_get(&tgt->kref);
3551 evt = ibmvfc_get_event(vhost);
3552 vhost->discovery_threads++;
3553 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3554 evt->tgt = tgt;
3555 mad = &evt->iu.implicit_logout;
3556 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3557 mad->common.version = cpu_to_be32(1);
3558 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3559 mad->common.length = cpu_to_be16(sizeof(*mad));
3560 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3561
3562 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3563 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3564 vhost->discovery_threads--;
3565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3566 kref_put(&tgt->kref, ibmvfc_release_tgt);
3567 } else
3568 tgt_dbg(tgt, "Sent Implicit Logout\n");
3569}
3570
989b8545
BK		 3571/**
3572 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3573 * @mad: ibmvfc passthru mad struct
3574 * @tgt: ibmvfc target struct
3575 *
3576 * Returns:
3577 * 1 if PLOGI needed / 0 if PLOGI not needed
3578 **/
3579static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3580 struct ibmvfc_target *tgt)
3581{
09dd15e0 3582 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
989b8545 3583 return 1;
09dd15e0 3584 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
989b8545 3585 return 1;
0aab6c3f 3586 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
989b8545
BK		 3587 return 1;
3588 return 0;
3589}
3590
3591/**
3592 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3593 * @evt: ibmvfc event struct
3594 *
3595 **/
3596static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3597{
3598 struct ibmvfc_target *tgt = evt->tgt;
3599 struct ibmvfc_host *vhost = evt->vhost;
3600 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
0aab6c3f 3601 u32 status = be16_to_cpu(mad->common.status);
989b8545
BK		 3602 u8 fc_reason, fc_explain;
3603
3604 vhost->discovery_threads--;
3605 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
10501e1c 3606 del_timer(&tgt->timer);
989b8545
BK		 3607
3608 switch (status) {
3609 case IBMVFC_MAD_SUCCESS:
3610 tgt_dbg(tgt, "ADISC succeeded\n");
3611 if (ibmvfc_adisc_needs_plogi(mad, tgt))
5e47167b 3612 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3613 break;
3614 case IBMVFC_MAD_DRIVER_FAILED:
3615 break;
3616 case IBMVFC_MAD_FAILED:
3617 default:
5e47167b 3618 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
0aab6c3f
TD		 3619 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3620 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
989b8545 3621 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f 3622 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
989b8545
BK		 3623 mad->iu.status, mad->iu.error,
3624 ibmvfc_get_fc_type(fc_reason), fc_reason,
3625 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3626 break;
f36cfe6a 3627 }
989b8545
BK		 3628
3629 kref_put(&tgt->kref, ibmvfc_release_tgt);
3630 ibmvfc_free_event(evt);
3631 wake_up(&vhost->work_wait_q);
3632}
3633
3634/**
3635 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3636 * @evt: ibmvfc event struct
3637 *
3638 **/
3639static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3640{
3641 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3642
3643 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3644 mad->common.version = cpu_to_be32(1);
3645 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3646 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3647 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3648 offsetof(struct ibmvfc_passthru_mad, iu));
3649 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3650 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3651 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3652 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3653 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3654 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3655 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3656 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3657 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3658 offsetof(struct ibmvfc_passthru_fc_iu, response));
3659 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
989b8545
BK		 3660}
3661
10501e1c
BK		 3662/**
3663 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3664 * @evt: ibmvfc event struct
3665 *
3666 * Just cleanup this event struct. Everything else is handled by
3667 * the ADISC completion handler. If the ADISC never actually comes
3668 * back, we still have the timer running on the ADISC event struct
3669 * which will fire and cause the CRQ to get reset.
3670 *
3671 **/
3672static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3673{
3674 struct ibmvfc_host *vhost = evt->vhost;
3675 struct ibmvfc_target *tgt = evt->tgt;
3676
3677 tgt_dbg(tgt, "ADISC cancel complete\n");
3678 vhost->abort_threads--;
3679 ibmvfc_free_event(evt);
3680 kref_put(&tgt->kref, ibmvfc_release_tgt);
3681 wake_up(&vhost->work_wait_q);
3682}
3683
3684/**
3685 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3686 * @tgt: ibmvfc target struct
3687 *
3688 * If an ADISC times out, send a cancel. If the cancel times
3689 * out, reset the CRQ. When the ADISC comes back as cancelled,
3690 * log back into the target.
3691 **/
9a5d04fc 3692static void ibmvfc_adisc_timeout(struct timer_list *t)
10501e1c 3693{
9a5d04fc 3694 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
10501e1c
BK		 3695 struct ibmvfc_host *vhost = tgt->vhost;
3696 struct ibmvfc_event *evt;
3697 struct ibmvfc_tmf *tmf;
3698 unsigned long flags;
3699 int rc;
3700
3701 tgt_dbg(tgt, "ADISC timeout\n");
3702 spin_lock_irqsave(vhost->host->host_lock, flags);
3703 if (vhost->abort_threads >= disc_threads ||
3704 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3705 vhost->state != IBMVFC_INITIALIZING ||
3706 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3707 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3708 return;
3709 }
3710
3711 vhost->abort_threads++;
3712 kref_get(&tgt->kref);
3713 evt = ibmvfc_get_event(vhost);
3714 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3715
3716 evt->tgt = tgt;
3717 tmf = &evt->iu.tmf;
3718 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 3719 tmf->common.version = cpu_to_be32(1);
3720 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3721 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3722 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3723 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
10501e1c
BK		 3724
3725 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3726
3727 if (rc) {
3728 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3729 vhost->abort_threads--;
3730 kref_put(&tgt->kref, ibmvfc_release_tgt);
3731 __ibmvfc_reset_host(vhost);
3732 } else
3733 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3734 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3735}
3736
989b8545
BK		 3737/**
3738 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3739 * @tgt: ibmvfc target struct
3740 *
10501e1c
BK		 3741 * When sending an ADISC we end up with two timers running. The
3742 * first timer is the timer in the ibmvfc target struct. If this
3743 * fires, we send a cancel to the target. The second timer is the
3744 * timer on the ibmvfc event for the ADISC, which is longer. If that
3745 * fires, it means the ADISC timed out and our attempt to cancel it
3746 * also failed, so we need to reset the CRQ.
989b8545
BK		 3747 **/
3748static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3749{
3750 struct ibmvfc_passthru_mad *mad;
3751 struct ibmvfc_host *vhost = tgt->vhost;
3752 struct ibmvfc_event *evt;
3753
3754 if (vhost->discovery_threads >= disc_threads)
3755 return;
3756
3757 kref_get(&tgt->kref);
3758 evt = ibmvfc_get_event(vhost);
3759 vhost->discovery_threads++;
3760 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3761 evt->tgt = tgt;
3762
3763 ibmvfc_init_passthru(evt);
3764 mad = &evt->iu.passthru;
0aab6c3f
TD		 3765 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3766 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3767 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
989b8545 3768
0aab6c3f 3769 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
989b8545
BK		 3770 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3771 sizeof(vhost->login_buf->resp.port_name));
3772 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3773 sizeof(vhost->login_buf->resp.node_name));
0aab6c3f 3774 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
989b8545 3775
10501e1c
BK		 3776 if (timer_pending(&tgt->timer))
3777 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3778 else {
10501e1c 3779 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
10501e1c
BK		 3780 add_timer(&tgt->timer);
3781 }
3782
989b8545 3783 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
10501e1c 3784 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
989b8545 3785 vhost->discovery_threads--;
10501e1c 3786 del_timer(&tgt->timer);
989b8545
BK		 3787 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3788 kref_put(&tgt->kref, ibmvfc_release_tgt);
3789 } else
3790 tgt_dbg(tgt, "Sent ADISC\n");
3791}
3792
072b91f9
BK		 3793/**
3794 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3795 * @evt: ibmvfc event struct
3796 *
3797 **/
3798static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3799{
3800 struct ibmvfc_target *tgt = evt->tgt;
3801 struct ibmvfc_host *vhost = evt->vhost;
3802 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
0aab6c3f 3803 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3804 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3805
3806 vhost->discovery_threads--;
3807 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3808 switch (status) {
3809 case IBMVFC_MAD_SUCCESS:
3810 tgt_dbg(tgt, "Query Target succeeded\n");
0aab6c3f
TD		 3811 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3812 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
072b91f9 3813 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3814 else
3815 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3816 break;
3817 case IBMVFC_MAD_DRIVER_FAILED:
3818 break;
3819 case IBMVFC_MAD_CRQ_ERROR:
3820 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3821 break;
3822 case IBMVFC_MAD_FAILED:
3823 default:
0aab6c3f
TD		 3824 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3825 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3826 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
072b91f9 3827 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
0aab6c3f 3828 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3829 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499
BK		 3830 else
3831 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3832
3833 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f
TD		 3834 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3835 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)),
3836 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)),
3837 rsp->fc_explain, status);
072b91f9 3838 break;
f36cfe6a 3839 }
072b91f9
BK		 3840
3841 kref_put(&tgt->kref, ibmvfc_release_tgt);
3842 ibmvfc_free_event(evt);
3843 wake_up(&vhost->work_wait_q);
3844}
3845
3846/**
3847 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3848 * @tgt: ibmvfc target struct
3849 *
3850 **/
3851static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3852{
3853 struct ibmvfc_query_tgt *query_tgt;
3854 struct ibmvfc_host *vhost = tgt->vhost;
3855 struct ibmvfc_event *evt;
3856
3857 if (vhost->discovery_threads >= disc_threads)
3858 return;
3859
3860 kref_get(&tgt->kref);
3861 evt = ibmvfc_get_event(vhost);
3862 vhost->discovery_threads++;
3863 evt->tgt = tgt;
3864 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3865 query_tgt = &evt->iu.query_tgt;
3866 memset(query_tgt, 0, sizeof(*query_tgt));
0aab6c3f
TD		 3867 query_tgt->common.version = cpu_to_be32(1);
3868 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3869 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3870 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
072b91f9
BK		 3871
3872 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3873 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3874 vhost->discovery_threads--;
3875 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3876 kref_put(&tgt->kref, ibmvfc_release_tgt);
3877 } else
3878 tgt_dbg(tgt, "Sent Query Target\n");
3879}
3880
3881/**
3882 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3883 * @vhost: ibmvfc host struct
3884 * @scsi_id: SCSI ID to allocate target for
3885 *
3886 * Returns:
3887 * 0 on success / other on failure
3888 **/
3889static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3890{
3891 struct ibmvfc_target *tgt;
3892 unsigned long flags;
3893
3894 spin_lock_irqsave(vhost->host->host_lock, flags);
3895 list_for_each_entry(tgt, &vhost->targets, queue) {
3896 if (tgt->scsi_id == scsi_id) {
3897 if (tgt->need_login)
3898 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3899 goto unlock_out;
3900 }
3901 }
3902 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3903
7270b9bd 3904 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
0883e3b3 3905 memset(tgt, 0, sizeof(*tgt));
072b91f9
BK		 3906 tgt->scsi_id = scsi_id;
3907 tgt->new_scsi_id = scsi_id;
3908 tgt->vhost = vhost;
3909 tgt->need_login = 1;
10501e1c 3910 tgt->cancel_key = vhost->task_set++;
9a5d04fc 3911 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
072b91f9
BK		 3912 kref_init(&tgt->kref);
3913 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3914 spin_lock_irqsave(vhost->host->host_lock, flags);
3915 list_add_tail(&tgt->queue, &vhost->targets);
3916
3917unlock_out:
3918 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3919 return 0;
3920}
3921
3922/**
3923 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3924 * @vhost: ibmvfc host struct
3925 *
3926 * Returns:
3927 * 0 on success / other on failure
3928 **/
3929static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3930{
3931 int i, rc;
3932
3933 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3934 rc = ibmvfc_alloc_target(vhost,
0aab6c3f
TD		 3935 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3936 IBMVFC_DISC_TGT_SCSI_ID_MASK);
072b91f9
BK		 3937
3938 return rc;
3939}
3940
3941/**
3942 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3943 * @evt: ibmvfc event struct
3944 *
3945 **/
3946static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3947{
3948 struct ibmvfc_host *vhost = evt->vhost;
3949 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
0aab6c3f 3950 u32 mad_status = be16_to_cpu(rsp->common.status);
7d0e4622 3951 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3952
3953 switch (mad_status) {
3954 case IBMVFC_MAD_SUCCESS:
3955 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
0aab6c3f 3956 vhost->num_targets = be32_to_cpu(rsp->num_written);
072b91f9
BK		 3957 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3958 break;
3959 case IBMVFC_MAD_FAILED:
7d0e4622
BK		 3960 level += ibmvfc_retry_host_init(vhost);
3961 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
0aab6c3f
TD		 3962 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3963 rsp->status, rsp->error);
072b91f9
BK		 3964 break;
3965 case IBMVFC_MAD_DRIVER_FAILED:
3966 break;
3967 default:
3968 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3969 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3970 break;
3971 }
3972
3973 ibmvfc_free_event(evt);
3974 wake_up(&vhost->work_wait_q);
3975}
3976
3977/**
3978 * ibmvfc_discover_targets - Send Discover Targets MAD
3979 * @vhost: ibmvfc host struct
3980 *
3981 **/
3982static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3983{
3984 struct ibmvfc_discover_targets *mad;
3985 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3986
3987 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3988 mad = &evt->iu.discover_targets;
3989 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3990 mad->common.version = cpu_to_be32(1);
3991 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
3992 mad->common.length = cpu_to_be16(sizeof(*mad));
3993 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
3994 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
3995 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
072b91f9
BK		 3996 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3997
3998 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3999 ibmvfc_dbg(vhost, "Sent discover targets\n");
4000 else
4001 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4002}
4003
4004/**
4005 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4006 * @evt: ibmvfc event struct
4007 *
4008 **/
4009static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4010{
4011 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4012 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
072b91f9
BK		 4013 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4014 unsigned int npiv_max_sectors;
7d0e4622 4015 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 4016
4017 switch (mad_status) {
4018 case IBMVFC_MAD_SUCCESS:
4019 ibmvfc_free_event(evt);
4020 break;
4021 case IBMVFC_MAD_FAILED:
0aab6c3f 4022 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 4023 level += ibmvfc_retry_host_init(vhost);
072b91f9
BK		 4024 else
4025 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
7d0e4622 4026 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
0aab6c3f
TD		 4027 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4028 rsp->status, rsp->error);
072b91f9
BK		 4029 ibmvfc_free_event(evt);
4030 return;
4031 case IBMVFC_MAD_CRQ_ERROR:
4032 ibmvfc_retry_host_init(vhost);
4033 case IBMVFC_MAD_DRIVER_FAILED:
4034 ibmvfc_free_event(evt);
4035 return;
4036 default:
4037 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4038 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4039 ibmvfc_free_event(evt);
4040 return;
4041 }
4042
4043 vhost->client_migrated = 0;
4044
0aab6c3f 4045 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
072b91f9
BK		 4046 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4047 rsp->flags);
4048 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4049 wake_up(&vhost->work_wait_q);
4050 return;
4051 }
4052
0aab6c3f 4053 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
072b91f9
BK		 4054 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4055 rsp->max_cmds);
4056 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4057 wake_up(&vhost->work_wait_q);
4058 return;
4059 }
4060
79111d08 4061 vhost->logged_in = 1;
0aab6c3f 4062 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
072b91f9
BK		 4063 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4064 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4065 rsp->drc_name, npiv_max_sectors);
4066
0aab6c3f
TD		 4067 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4068 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4069 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4070 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
072b91f9
BK		 4071 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4072 fc_host_supported_classes(vhost->host) = 0;
0aab6c3f 4073 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4074 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
0aab6c3f 4075 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4076 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
0aab6c3f 4077 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
072b91f9
BK		 4078 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4079 fc_host_maxframe_size(vhost->host) =
0aab6c3f 4080 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4081
0aab6c3f 4082 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
072b91f9
BK		 4083 vhost->host->max_sectors = npiv_max_sectors;
4084 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4085 wake_up(&vhost->work_wait_q);
4086}
4087
4088/**
4089 * ibmvfc_npiv_login - Sends NPIV login
4090 * @vhost: ibmvfc host struct
4091 *
4092 **/
4093static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4094{
4095 struct ibmvfc_npiv_login_mad *mad;
4096 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4097
4098 ibmvfc_gather_partition_info(vhost);
4099 ibmvfc_set_login_info(vhost);
4100 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4101
4102 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4103 mad = &evt->iu.npiv_login;
4104 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
0aab6c3f
TD		 4105 mad->common.version = cpu_to_be32(1);
4106 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4107 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4108 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4109 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
072b91f9 4110
072b91f9
BK		 4111 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4112
4113 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4114 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4115 else
4116 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4117};
4118
79111d08
BK		 4119/**
4120 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4121 * @vhost: ibmvfc host struct
4122 *
4123 **/
4124static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4125{
4126 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4127 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
79111d08
BK		 4128
4129 ibmvfc_free_event(evt);
4130
4131 switch (mad_status) {
4132 case IBMVFC_MAD_SUCCESS:
4133 if (list_empty(&vhost->sent) &&
4134 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
861890c6 4135 ibmvfc_init_host(vhost);
79111d08
BK		 4136 return;
4137 }
4138 break;
4139 case IBMVFC_MAD_FAILED:
4140 case IBMVFC_MAD_NOT_SUPPORTED:
4141 case IBMVFC_MAD_CRQ_ERROR:
4142 case IBMVFC_MAD_DRIVER_FAILED:
4143 default:
4144 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4145 break;
4146 }
4147
4148 ibmvfc_hard_reset_host(vhost);
4149}
4150
4151/**
4152 * ibmvfc_npiv_logout - Issue an NPIV Logout
4153 * @vhost: ibmvfc host struct
4154 *
4155 **/
4156static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4157{
4158 struct ibmvfc_npiv_logout_mad *mad;
4159 struct ibmvfc_event *evt;
4160
4161 evt = ibmvfc_get_event(vhost);
4162 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4163
4164 mad = &evt->iu.npiv_logout;
4165 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 4166 mad->common.version = cpu_to_be32(1);
4167 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4168 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
79111d08
BK		 4169
4170 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4171
4172 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4173 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4174 else
4175 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4176}
4177
072b91f9
BK		 4178/**
4179 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4180 * @vhost: ibmvfc host struct
4181 *
4182 * Returns:
4183 * 1 if work to do / 0 if not
4184 **/
4185static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4186{
4187 struct ibmvfc_target *tgt;
4188
4189 list_for_each_entry(tgt, &vhost->targets, queue) {
4190 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4191 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4192 return 1;
4193 }
4194
4195 return 0;
4196}
4197
4198/**
4199 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4200 * @vhost: ibmvfc host struct
4201 *
4202 * Returns:
4203 * 1 if work to do / 0 if not
4204 **/
4205static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4206{
4207 struct ibmvfc_target *tgt;
4208
4209 if (kthread_should_stop())
4210 return 1;
4211 switch (vhost->action) {
4212 case IBMVFC_HOST_ACTION_NONE:
4213 case IBMVFC_HOST_ACTION_INIT_WAIT:
79111d08 4214 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4215 return 0;
4216 case IBMVFC_HOST_ACTION_TGT_INIT:
4217 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4218 if (vhost->discovery_threads == disc_threads)
4219 return 0;
4220 list_for_each_entry(tgt, &vhost->targets, queue)
4221 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4222 return 1;
4223 list_for_each_entry(tgt, &vhost->targets, queue)
4224 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4225 return 0;
4226 return 1;
79111d08 4227 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 4228 case IBMVFC_HOST_ACTION_INIT:
4229 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
072b91f9 4230 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4231 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 4232 case IBMVFC_HOST_ACTION_QUERY:
73ee5d86
BK		 4233 case IBMVFC_HOST_ACTION_RESET:
4234 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 4235 default:
4236 break;
f36cfe6a 4237 }
072b91f9
BK		 4238
4239 return 1;
4240}
4241
4242/**
4243 * ibmvfc_work_to_do - Is there task level work to do?
4244 * @vhost: ibmvfc host struct
4245 *
4246 * Returns:
4247 * 1 if work to do / 0 if not
4248 **/
4249static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4250{
4251 unsigned long flags;
4252 int rc;
4253
4254 spin_lock_irqsave(vhost->host->host_lock, flags);
4255 rc = __ibmvfc_work_to_do(vhost);
4256 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4257 return rc;
4258}
4259
4260/**
4261 * ibmvfc_log_ae - Log async events if necessary
4262 * @vhost: ibmvfc host struct
4263 * @events: events to log
4264 *
4265 **/
4266static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4267{
4268 if (events & IBMVFC_AE_RSCN)
4269 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4270 if ((events & IBMVFC_AE_LINKDOWN) &&
4271 vhost->state >= IBMVFC_HALTED)
4272 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4273 if ((events & IBMVFC_AE_LINKUP) &&
4274 vhost->state == IBMVFC_INITIALIZING)
4275 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4276}
4277
4278/**
4279 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4280 * @tgt: ibmvfc target struct
4281 *
4282 **/
4283static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4284{
4285 struct ibmvfc_host *vhost = tgt->vhost;
43c8da90 4286 struct fc_rport *rport;
072b91f9
BK		 4287 unsigned long flags;
4288
43c8da90
BK		 4289 tgt_dbg(tgt, "Adding rport\n");
4290 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4291 spin_lock_irqsave(vhost->host->host_lock, flags);
4292
4293 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4294 tgt_dbg(tgt, "Deleting rport\n");
4295 list_del(&tgt->queue);
d5da3040 4296 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
0883e3b3 4297 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4298 fc_remote_port_delete(rport);
4299 del_timer_sync(&tgt->timer);
4300 kref_put(&tgt->kref, ibmvfc_release_tgt);
0883e3b3 4301 return;
d5da3040
BK		 4302 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4303 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4304 return;
0883e3b3
BK		 4305 }
4306
072b91f9
BK		 4307 if (rport) {
4308 tgt_dbg(tgt, "rport add succeeded\n");
43c8da90 4309 tgt->rport = rport;
0aab6c3f 4310 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4311 rport->supported_classes = 0;
52d7e861 4312 tgt->target_id = rport->scsi_target_id;
0aab6c3f 4313 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4314 rport->supported_classes |= FC_COS_CLASS1;
0aab6c3f 4315 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4316 rport->supported_classes |= FC_COS_CLASS2;
0aab6c3f 4317 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
072b91f9 4318 rport->supported_classes |= FC_COS_CLASS3;
d31429e1 4319 if (rport->rqst_q)
8a78362c 4320 blk_queue_max_segments(rport->rqst_q, 1);
072b91f9
BK		 4321 } else
4322 tgt_dbg(tgt, "rport add failed\n");
4323 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4324}
4325
4326/**
4327 * ibmvfc_do_work - Do task level work
4328 * @vhost: ibmvfc host struct
4329 *
4330 **/
4331static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4332{
4333 struct ibmvfc_target *tgt;
4334 unsigned long flags;
4335 struct fc_rport *rport;
73ee5d86 4336 int rc;
072b91f9
BK		 4337
4338 ibmvfc_log_ae(vhost, vhost->events_to_log);
4339 spin_lock_irqsave(vhost->host->host_lock, flags);
4340 vhost->events_to_log = 0;
4341 switch (vhost->action) {
4342 case IBMVFC_HOST_ACTION_NONE:
79111d08 4343 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4344 case IBMVFC_HOST_ACTION_INIT_WAIT:
4345 break;
73ee5d86
BK		 4346 case IBMVFC_HOST_ACTION_RESET:
4347 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4348 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4349 rc = ibmvfc_reset_crq(vhost);
4350 spin_lock_irqsave(vhost->host->host_lock, flags);
d24099df
BK		 4351 if (rc == H_CLOSED)
4352 vio_enable_interrupts(to_vio_dev(vhost->dev));
38553564
BK		 4353 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4354 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
73ee5d86
BK		 4355 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4356 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4357 }
4358 break;
4359 case IBMVFC_HOST_ACTION_REENABLE:
4360 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4361 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4362 rc = ibmvfc_reenable_crq_queue(vhost);
4363 spin_lock_irqsave(vhost->host->host_lock, flags);
4364 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4365 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4366 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4367 }
4368 break;
79111d08
BK		 4369 case IBMVFC_HOST_ACTION_LOGO:
4370 vhost->job_step(vhost);
4371 break;
072b91f9
BK		 4372 case IBMVFC_HOST_ACTION_INIT:
4373 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
1c41fa82
BK		 4374 if (vhost->delay_init) {
4375 vhost->delay_init = 0;
4376 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2131b33 4377 ssleep(15);
1c41fa82
BK		 4378 return;
4379 } else
4380 vhost->job_step(vhost);
072b91f9
BK		 4381 break;
4382 case IBMVFC_HOST_ACTION_QUERY:
4383 list_for_each_entry(tgt, &vhost->targets, queue)
4384 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4385 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4386 break;
4387 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4388 list_for_each_entry(tgt, &vhost->targets, queue) {
4389 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4390 tgt->job_step(tgt);
4391 break;
4392 }
4393 }
4394
4395 if (!ibmvfc_dev_init_to_do(vhost))
4396 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4397 break;
4398 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4399 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 4400 list_for_each_entry(tgt, &vhost->targets, queue) {
4401 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4402 tgt_dbg(tgt, "Deleting rport\n");
4403 rport = tgt->rport;
4404 tgt->rport = NULL;
4405 list_del(&tgt->queue);
d5da3040 4406 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
072b91f9
BK		 4407 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4408 if (rport)
4409 fc_remote_port_delete(rport);
10501e1c 4410 del_timer_sync(&tgt->timer);
072b91f9
BK		 4411 kref_put(&tgt->kref, ibmvfc_release_tgt);
4412 return;
4413 }
4414 }
4415
4416 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499 4417 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
43c8da90
BK		 4418 if (vhost->reinit) {
4419 vhost->reinit = 0;
4420 scsi_block_requests(vhost->host);
4421 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4422 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4423 } else {
4424 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4426 wake_up(&vhost->init_wait_q);
4427 schedule_work(&vhost->rport_add_work_q);
4428 vhost->init_retries = 0;
4429 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4430 scsi_unblock_requests(vhost->host);
4431 }
4432
10e79499
BK		 4433 return;
4434 } else {
4435 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4436 vhost->job_step = ibmvfc_discover_targets;
4437 }
072b91f9
BK		 4438 } else {
4439 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4440 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4441 scsi_unblock_requests(vhost->host);
4442 wake_up(&vhost->init_wait_q);
4443 return;
4444 }
4445 break;
4446 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4447 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4448 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4449 ibmvfc_alloc_targets(vhost);
4450 spin_lock_irqsave(vhost->host->host_lock, flags);
4451 break;
4452 case IBMVFC_HOST_ACTION_TGT_INIT:
4453 list_for_each_entry(tgt, &vhost->targets, queue) {
4454 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4455 tgt->job_step(tgt);
4456 break;
4457 }
4458 }
4459
10e79499
BK		 4460 if (!ibmvfc_dev_init_to_do(vhost))
4461 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9 4462 break;
072b91f9
BK		 4463 default:
4464 break;
f36cfe6a 4465 }
072b91f9
BK		 4466
4467 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4468}
4469
4470/**
4471 * ibmvfc_work - Do task level work
4472 * @data: ibmvfc host struct
4473 *
4474 * Returns:
4475 * zero
4476 **/
4477static int ibmvfc_work(void *data)
4478{
4479 struct ibmvfc_host *vhost = data;
4480 int rc;
4481
8698a745 4482 set_user_nice(current, MIN_NICE);
072b91f9
BK		 4483
4484 while (1) {
4485 rc = wait_event_interruptible(vhost->work_wait_q,
4486 ibmvfc_work_to_do(vhost));
4487
4488 BUG_ON(rc);
4489
4490 if (kthread_should_stop())
4491 break;
4492
4493 ibmvfc_do_work(vhost);
4494 }
4495
4496 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4497 return 0;
4498}
4499
4500/**
4501 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4502 * @vhost: ibmvfc host struct
4503 *
4504 * Allocates a page for messages, maps it for dma, and registers
4505 * the crq with the hypervisor.
4506 *
4507 * Return value:
4508 * zero on success / other on failure
4509 **/
4510static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4511{
4512 int rc, retrc = -ENOMEM;
4513 struct device *dev = vhost->dev;
4514 struct vio_dev *vdev = to_vio_dev(dev);
4515 struct ibmvfc_crq_queue *crq = &vhost->crq;
4516
4517 ENTER;
4518 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4519
4520 if (!crq->msgs)
4521 return -ENOMEM;
4522
4523 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4524 crq->msg_token = dma_map_single(dev, crq->msgs,
4525 PAGE_SIZE, DMA_BIDIRECTIONAL);
4526
8d8bb39b 4527 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 4528 goto map_failed;
4529
4530 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4531 crq->msg_token, PAGE_SIZE);
4532
4533 if (rc == H_RESOURCE)
4534 /* maybe kexecing and resource is busy. try a reset */
4535 retrc = rc = ibmvfc_reset_crq(vhost);
4536
4537 if (rc == H_CLOSED)
4538 dev_warn(dev, "Partner adapter not ready\n");
4539 else if (rc) {
4540 dev_warn(dev, "Error %d opening adapter\n", rc);
4541 goto reg_crq_failed;
4542 }
4543
4544 retrc = 0;
4545
039a0898
BK		 4546 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4547
072b91f9
BK		 4548 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4549 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4550 goto req_irq_failed;
4551 }
4552
4553 if ((rc = vio_enable_interrupts(vdev))) {
4554 dev_err(dev, "Error %d enabling interrupts\n", rc);
4555 goto req_irq_failed;
4556 }
4557
4558 crq->cur = 0;
4559 LEAVE;
4560 return retrc;
4561
4562req_irq_failed:
039a0898 4563 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 4564 do {
4565 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4566 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4567reg_crq_failed:
4568 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4569map_failed:
4570 free_page((unsigned long)crq->msgs);
4571 return retrc;
4572}
4573
4574/**
4575 * ibmvfc_free_mem - Free memory for vhost
4576 * @vhost: ibmvfc host struct
4577 *
4578 * Return value:
4579 * none
4580 **/
4581static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4582{
4583 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4584
4585 ENTER;
4586 mempool_destroy(vhost->tgt_pool);
4587 kfree(vhost->trace);
4588 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4589 vhost->disc_buf_dma);
4590 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4591 vhost->login_buf, vhost->login_buf_dma);
4592 dma_pool_destroy(vhost->sg_pool);
4593 dma_unmap_single(vhost->dev, async_q->msg_token,
4594 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4595 free_page((unsigned long)async_q->msgs);
4596 LEAVE;
4597}
4598
4599/**
4600 * ibmvfc_alloc_mem - Allocate memory for vhost
4601 * @vhost: ibmvfc host struct
4602 *
4603 * Return value:
4604 * 0 on success / non-zero on failure
4605 **/
4606static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4607{
4608 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4609 struct device *dev = vhost->dev;
4610
4611 ENTER;
4612 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4613 if (!async_q->msgs) {
4614 dev_err(dev, "Couldn't allocate async queue.\n");
4615 goto nomem;
4616 }
4617
4618 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4619 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4620 async_q->size * sizeof(*async_q->msgs),
4621 DMA_BIDIRECTIONAL);
4622
8d8bb39b 4623 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 4624 dev_err(dev, "Failed to map async queue\n");
4625 goto free_async_crq;
4626 }
4627
4628 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4629 SG_ALL * sizeof(struct srp_direct_buf),
4630 sizeof(struct srp_direct_buf), 0);
4631
4632 if (!vhost->sg_pool) {
4633 dev_err(dev, "Failed to allocate sg pool\n");
4634 goto unmap_async_crq;
4635 }
4636
4637 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4638 &vhost->login_buf_dma, GFP_KERNEL);
4639
4640 if (!vhost->login_buf) {
4641 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4642 goto free_sg_pool;
4643 }
4644
4645 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4646 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4647 &vhost->disc_buf_dma, GFP_KERNEL);
4648
4649 if (!vhost->disc_buf) {
4650 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4651 goto free_login_buffer;
4652 }
4653
4654 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4655 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4656
4657 if (!vhost->trace)
4658 goto free_disc_buffer;
4659
d6886692 4660 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
072b91f9
BK		 4661 sizeof(struct ibmvfc_target));
4662
4663 if (!vhost->tgt_pool) {
4664 dev_err(dev, "Couldn't allocate target memory pool\n");
4665 goto free_trace;
4666 }
4667
4668 LEAVE;
4669 return 0;
4670
4671free_trace:
4672 kfree(vhost->trace);
4673free_disc_buffer:
4674 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4675 vhost->disc_buf_dma);
4676free_login_buffer:
4677 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4678 vhost->login_buf, vhost->login_buf_dma);
4679free_sg_pool:
4680 dma_pool_destroy(vhost->sg_pool);
4681unmap_async_crq:
4682 dma_unmap_single(dev, async_q->msg_token,
4683 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4684free_async_crq:
4685 free_page((unsigned long)async_q->msgs);
4686nomem:
4687 LEAVE;
4688 return -ENOMEM;
4689}
4690
43c8da90
BK		 4691/**
4692 * ibmvfc_rport_add_thread - Worker thread for rport adds
4693 * @work: work struct
4694 *
4695 **/
4696static void ibmvfc_rport_add_thread(struct work_struct *work)
4697{
4698 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4699 rport_add_work_q);
4700 struct ibmvfc_target *tgt;
4701 struct fc_rport *rport;
4702 unsigned long flags;
4703 int did_work;
4704
4705 ENTER;
4706 spin_lock_irqsave(vhost->host->host_lock, flags);
4707 do {
4708 did_work = 0;
4709 if (vhost->state != IBMVFC_ACTIVE)
4710 break;
4711
4712 list_for_each_entry(tgt, &vhost->targets, queue) {
4713 if (tgt->add_rport) {
4714 did_work = 1;
4715 tgt->add_rport = 0;
4716 kref_get(&tgt->kref);
4717 rport = tgt->rport;
4718 if (!rport) {
4719 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4720 ibmvfc_tgt_add_rport(tgt);
4721 } else if (get_device(&rport->dev)) {
4722 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4723 tgt_dbg(tgt, "Setting rport roles\n");
4724 fc_remote_port_rolechg(rport, tgt->ids.roles);
4725 put_device(&rport->dev);
0073887a
DC		 4726 } else {
4727 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4728 }
4729
4730 kref_put(&tgt->kref, ibmvfc_release_tgt);
4731 spin_lock_irqsave(vhost->host->host_lock, flags);
4732 break;
4733 }
4734 }
4735 } while(did_work);
4736
4737 if (vhost->state == IBMVFC_ACTIVE)
4738 vhost->scan_complete = 1;
4739 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4740 LEAVE;
4741}
4742
072b91f9
BK		 4743/**
4744 * ibmvfc_probe - Adapter hot plug add entry point
4745 * @vdev: vio device struct
4746 * @id: vio device id struct
4747 *
4748 * Return value:
4749 * 0 on success / non-zero on failure
4750 **/
4751static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4752{
4753 struct ibmvfc_host *vhost;
4754 struct Scsi_Host *shost;
4755 struct device *dev = &vdev->dev;
4756 int rc = -ENOMEM;
4757
4758 ENTER;
4759 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4760 if (!shost) {
4761 dev_err(dev, "Couldn't allocate host data\n");
4762 goto out;
4763 }
4764
4765 shost->transportt = ibmvfc_transport_template;
4766 shost->can_queue = max_requests;
4767 shost->max_lun = max_lun;
4768 shost->max_id = max_targets;
4769 shost->max_sectors = IBMVFC_MAX_SECTORS;
4770 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4771 shost->unique_id = shost->host_no;
4772
4773 vhost = shost_priv(shost);
4774 INIT_LIST_HEAD(&vhost->sent);
4775 INIT_LIST_HEAD(&vhost->free);
4776 INIT_LIST_HEAD(&vhost->targets);
4777 sprintf(vhost->name, IBMVFC_NAME);
4778 vhost->host = shost;
4779 vhost->dev = dev;
4780 vhost->partition_number = -1;
4781 vhost->log_level = log_level;
10501e1c 4782 vhost->task_set = 1;
072b91f9
BK		 4783 strcpy(vhost->partition_name, "UNKNOWN");
4784 init_waitqueue_head(&vhost->work_wait_q);
4785 init_waitqueue_head(&vhost->init_wait_q);
43c8da90 4786 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
d31429e1 4787 mutex_init(&vhost->passthru_mutex);
072b91f9
BK		 4788
4789 if ((rc = ibmvfc_alloc_mem(vhost)))
4790 goto free_scsi_host;
4791
4792 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4793 shost->host_no);
4794
4795 if (IS_ERR(vhost->work_thread)) {
4796 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4797 PTR_ERR(vhost->work_thread));
4798 goto free_host_mem;
4799 }
4800
4801 if ((rc = ibmvfc_init_crq(vhost))) {
4802 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4803 goto kill_kthread;
4804 }
4805
4806 if ((rc = ibmvfc_init_event_pool(vhost))) {
4807 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4808 goto release_crq;
4809 }
4810
4811 if ((rc = scsi_add_host(shost, dev)))
4812 goto release_event_pool;
4813
a5110f29
MC		 4814 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4815
072b91f9
BK		 4816 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4817 &ibmvfc_trace_attr))) {
4818 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4819 goto remove_shost;
4820 }
4821
d31429e1 4822 if (shost_to_fc_host(shost)->rqst_q)
8a78362c 4823 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
072b91f9
BK		 4824 dev_set_drvdata(dev, vhost);
4825 spin_lock(&ibmvfc_driver_lock);
4826 list_add_tail(&vhost->queue, &ibmvfc_head);
4827 spin_unlock(&ibmvfc_driver_lock);
4828
4829 ibmvfc_send_crq_init(vhost);
4830 scsi_scan_host(shost);
4831 return 0;
4832
4833remove_shost:
4834 scsi_remove_host(shost);
4835release_event_pool:
4836 ibmvfc_free_event_pool(vhost);
4837release_crq:
4838 ibmvfc_release_crq_queue(vhost);
4839kill_kthread:
4840 kthread_stop(vhost->work_thread);
4841free_host_mem:
4842 ibmvfc_free_mem(vhost);
4843free_scsi_host:
4844 scsi_host_put(shost);
4845out:
4846 LEAVE;
4847 return rc;
4848}
4849
4850/**
4851 * ibmvfc_remove - Adapter hot plug remove entry point
4852 * @vdev: vio device struct
4853 *
4854 * Return value:
4855 * 0
4856 **/
4857static int ibmvfc_remove(struct vio_dev *vdev)
4858{
4859 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4860 unsigned long flags;
4861
4862 ENTER;
4863 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
70431105
BK		 4864
4865 spin_lock_irqsave(vhost->host->host_lock, flags);
2d0da2a4 4866 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
70431105
BK		 4867 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4868
2d0da2a4
BK		 4869 ibmvfc_wait_while_resetting(vhost);
4870 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 4871 kthread_stop(vhost->work_thread);
4872 fc_remove_host(vhost->host);
4873 scsi_remove_host(vhost->host);
072b91f9
BK		 4874
4875 spin_lock_irqsave(vhost->host->host_lock, flags);
4876 ibmvfc_purge_requests(vhost, DID_ERROR);
4877 ibmvfc_free_event_pool(vhost);
4878 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4879
4880 ibmvfc_free_mem(vhost);
4881 spin_lock(&ibmvfc_driver_lock);
4882 list_del(&vhost->queue);
4883 spin_unlock(&ibmvfc_driver_lock);
4884 scsi_host_put(vhost->host);
4885 LEAVE;
4886 return 0;
4887}
4888
b0f4d4cf
BK		 4889/**
4890 * ibmvfc_resume - Resume from suspend
4891 * @dev: device struct
4892 *
4893 * We may have lost an interrupt across suspend/resume, so kick the
4894 * interrupt handler
4895 *
4896 */
4897static int ibmvfc_resume(struct device *dev)
4898{
4899 unsigned long flags;
4900 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4901 struct vio_dev *vdev = to_vio_dev(dev);
4902
4903 spin_lock_irqsave(vhost->host->host_lock, flags);
4904 vio_disable_interrupts(vdev);
4905 tasklet_schedule(&vhost->tasklet);
4906 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4907 return 0;
4908}
4909
39c1ffec
BK		 4910/**
4911 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4912 * @vdev: vio device struct
4913 *
4914 * Return value:
4915 * Number of bytes the driver will need to DMA map at the same time in
4916 * order to perform well.
4917 */
4918static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4919{
4920 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4921 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4922}
4923
e4df3eaa 4924static const struct vio_device_id ibmvfc_device_table[] = {
072b91f9
BK		 4925 {"fcp", "IBM,vfc-client"},
4926 { "", "" }
4927};
4928MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4929
e4a80c31 4930static const struct dev_pm_ops ibmvfc_pm_ops = {
b0f4d4cf
BK		 4931 .resume = ibmvfc_resume
4932};
4933
072b91f9
BK		 4934static struct vio_driver ibmvfc_driver = {
4935 .id_table = ibmvfc_device_table,
4936 .probe = ibmvfc_probe,
4937 .remove = ibmvfc_remove,
39c1ffec 4938 .get_desired_dma = ibmvfc_get_desired_dma,
cb52d897
BH		 4939 .name = IBMVFC_NAME,
4940 .pm = &ibmvfc_pm_ops,
072b91f9
BK		 4941};
4942
4943static struct fc_function_template ibmvfc_transport_functions = {
4944 .show_host_fabric_name = 1,
4945 .show_host_node_name = 1,
4946 .show_host_port_name = 1,
4947 .show_host_supported_classes = 1,
4948 .show_host_port_type = 1,
4949 .show_host_port_id = 1,
9ab3610f 4950 .show_host_maxframe_size = 1,
072b91f9
BK		 4951
4952 .get_host_port_state = ibmvfc_get_host_port_state,
4953 .show_host_port_state = 1,
4954
4955 .get_host_speed = ibmvfc_get_host_speed,
4956 .show_host_speed = 1,
4957
4958 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4959 .terminate_rport_io = ibmvfc_terminate_rport_io,
4960
4961 .show_rport_maxframe_size = 1,
4962 .show_rport_supported_classes = 1,
4963
4964 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4965 .show_rport_dev_loss_tmo = 1,
4966
4967 .get_starget_node_name = ibmvfc_get_starget_node_name,
4968 .show_starget_node_name = 1,
4969
4970 .get_starget_port_name = ibmvfc_get_starget_port_name,
4971 .show_starget_port_name = 1,
4972
4973 .get_starget_port_id = ibmvfc_get_starget_port_id,
4974 .show_starget_port_id = 1,
d31429e1
BK		 4975
4976 .bsg_request = ibmvfc_bsg_request,
4977 .bsg_timeout = ibmvfc_bsg_timeout,
072b91f9
BK		 4978};
4979
4980/**
4981 * ibmvfc_module_init - Initialize the ibmvfc module
4982 *
4983 * Return value:
4984 * 0 on success / other on failure
4985 **/
4986static int __init ibmvfc_module_init(void)
4987{
4988 int rc;
4989
4990 if (!firmware_has_feature(FW_FEATURE_VIO))
4991 return -ENODEV;
4992
4993 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4994 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4995
4996 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4997 if (!ibmvfc_transport_template)
4998 return -ENOMEM;
4999
5000 rc = vio_register_driver(&ibmvfc_driver);
5001 if (rc)
5002 fc_release_transport(ibmvfc_transport_template);
5003 return rc;
5004}
5005
5006/**
5007 * ibmvfc_module_exit - Teardown the ibmvfc module
5008 *
5009 * Return value:
5010 * nothing
5011 **/
5012static void __exit ibmvfc_module_exit(void)
5013{
5014 vio_unregister_driver(&ibmvfc_driver);
5015 fc_release_transport(ibmvfc_transport_template);
5016}
5017
5018module_init(ibmvfc_module_init);
5019module_exit(ibmvfc_module_exit);
Linux 6.x block layer and io_uring tree(s)