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scsi: ibmvfc: Remove "failed" from logged errors
[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" },
142};
143
144static void ibmvfc_npiv_login(struct ibmvfc_host *);
145static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
146static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
147static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
79111d08 148static void ibmvfc_npiv_logout(struct ibmvfc_host *);
072b91f9
BK		 149
150static const char *unknown_error = "unknown error";
151
152#ifdef CONFIG_SCSI_IBMVFC_TRACE
153/**
154 * ibmvfc_trc_start - Log a start trace entry
155 * @evt: ibmvfc event struct
156 *
157 **/
158static void ibmvfc_trc_start(struct ibmvfc_event *evt)
159{
160 struct ibmvfc_host *vhost = evt->vhost;
161 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
162 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
163 struct ibmvfc_trace_entry *entry;
164
165 entry = &vhost->trace[vhost->trace_index++];
166 entry->evt = evt;
167 entry->time = jiffies;
168 entry->fmt = evt->crq.format;
169 entry->type = IBMVFC_TRC_START;
170
171 switch (entry->fmt) {
172 case IBMVFC_CMD_FORMAT:
173 entry->op_code = vfc_cmd->iu.cdb[0];
0aab6c3f 174 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 175 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
176 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f 177 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
072b91f9
BK		 178 break;
179 case IBMVFC_MAD_FORMAT:
0aab6c3f 180 entry->op_code = be32_to_cpu(mad->opcode);
072b91f9
BK		 181 break;
182 default:
183 break;
f36cfe6a 184 }
072b91f9
BK		 185}
186
187/**
188 * ibmvfc_trc_end - Log an end trace entry
189 * @evt: ibmvfc event struct
190 *
191 **/
192static void ibmvfc_trc_end(struct ibmvfc_event *evt)
193{
194 struct ibmvfc_host *vhost = evt->vhost;
195 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
196 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
197 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
198
199 entry->evt = evt;
200 entry->time = jiffies;
201 entry->fmt = evt->crq.format;
202 entry->type = IBMVFC_TRC_END;
203
204 switch (entry->fmt) {
205 case IBMVFC_CMD_FORMAT:
206 entry->op_code = vfc_cmd->iu.cdb[0];
0aab6c3f 207 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 208 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
209 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f
TD		 210 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
211 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
072b91f9
BK		 212 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
213 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
214 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
215 break;
216 case IBMVFC_MAD_FORMAT:
0aab6c3f
TD		 217 entry->op_code = be32_to_cpu(mad->opcode);
218 entry->u.end.status = be16_to_cpu(mad->status);
072b91f9
BK		 219 break;
220 default:
221 break;
222
f36cfe6a 223 }
072b91f9
BK		 224}
225
226#else
227#define ibmvfc_trc_start(evt) do { } while (0)
228#define ibmvfc_trc_end(evt) do { } while (0)
229#endif
230
231/**
232 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
233 * @status: status / error class
234 * @error: error
235 *
236 * Return value:
237 * index into cmd_status / -EINVAL on failure
238 **/
239static int ibmvfc_get_err_index(u16 status, u16 error)
240{
241 int i;
242
243 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
244 if ((cmd_status[i].status & status) == cmd_status[i].status &&
245 cmd_status[i].error == error)
246 return i;
247
248 return -EINVAL;
249}
250
251/**
252 * ibmvfc_get_cmd_error - Find the error description for the fcp response
253 * @status: status / error class
254 * @error: error
255 *
256 * Return value:
257 * error description string
258 **/
259static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
260{
261 int rc = ibmvfc_get_err_index(status, error);
262 if (rc >= 0)
263 return cmd_status[rc].name;
264 return unknown_error;
265}
266
267/**
268 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
269 * @vfc_cmd: ibmvfc command struct
270 *
271 * Return value:
272 * SCSI result value to return for completed command
273 **/
274static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
275{
276 int err;
277 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
0aab6c3f 278 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 279
280 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
4a2837d4 281 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
072b91f9
BK		 282 rsp->data.info.rsp_code))
283 return DID_ERROR << 16;
284
0aab6c3f 285 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 286 if (err >= 0)
287 return rsp->scsi_status | (cmd_status[err].result << 16);
288 return rsp->scsi_status | (DID_ERROR << 16);
289}
290
291/**
292 * ibmvfc_retry_cmd - Determine if error status is retryable
293 * @status: status / error class
294 * @error: error
295 *
296 * Return value:
297 * 1 if error should be retried / 0 if it should not
298 **/
299static int ibmvfc_retry_cmd(u16 status, u16 error)
300{
301 int rc = ibmvfc_get_err_index(status, error);
302
303 if (rc >= 0)
304 return cmd_status[rc].retry;
305 return 1;
306}
307
308static const char *unknown_fc_explain = "unknown fc explain";
309
310static const struct {
311 u16 fc_explain;
312 char *name;
313} ls_explain [] = {
314 { 0x00, "no additional explanation" },
315 { 0x01, "service parameter error - options" },
316 { 0x03, "service parameter error - initiator control" },
317 { 0x05, "service parameter error - recipient control" },
318 { 0x07, "service parameter error - received data field size" },
319 { 0x09, "service parameter error - concurrent seq" },
320 { 0x0B, "service parameter error - credit" },
321 { 0x0D, "invalid N_Port/F_Port_Name" },
322 { 0x0E, "invalid node/Fabric Name" },
323 { 0x0F, "invalid common service parameters" },
324 { 0x11, "invalid association header" },
325 { 0x13, "association header required" },
326 { 0x15, "invalid originator S_ID" },
327 { 0x17, "invalid OX_ID-RX-ID combination" },
328 { 0x19, "command (request) already in progress" },
329 { 0x1E, "N_Port Login requested" },
330 { 0x1F, "Invalid N_Port_ID" },
331};
332
333static const struct {
334 u16 fc_explain;
335 char *name;
336} gs_explain [] = {
337 { 0x00, "no additional explanation" },
338 { 0x01, "port identifier not registered" },
339 { 0x02, "port name not registered" },
340 { 0x03, "node name not registered" },
341 { 0x04, "class of service not registered" },
342 { 0x06, "initial process associator not registered" },
343 { 0x07, "FC-4 TYPEs not registered" },
344 { 0x08, "symbolic port name not registered" },
345 { 0x09, "symbolic node name not registered" },
346 { 0x0A, "port type not registered" },
347 { 0xF0, "authorization exception" },
348 { 0xF1, "authentication exception" },
349 { 0xF2, "data base full" },
350 { 0xF3, "data base empty" },
351 { 0xF4, "processing request" },
352 { 0xF5, "unable to verify connection" },
353 { 0xF6, "devices not in a common zone" },
354};
355
356/**
357 * ibmvfc_get_ls_explain - Return the FC Explain description text
358 * @status: FC Explain status
359 *
360 * Returns:
361 * error string
362 **/
363static const char *ibmvfc_get_ls_explain(u16 status)
364{
365 int i;
366
367 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
368 if (ls_explain[i].fc_explain == status)
369 return ls_explain[i].name;
370
371 return unknown_fc_explain;
372}
373
374/**
375 * ibmvfc_get_gs_explain - Return the FC Explain description text
376 * @status: FC Explain status
377 *
378 * Returns:
379 * error string
380 **/
381static const char *ibmvfc_get_gs_explain(u16 status)
382{
383 int i;
384
385 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
386 if (gs_explain[i].fc_explain == status)
387 return gs_explain[i].name;
388
389 return unknown_fc_explain;
390}
391
392static const struct {
393 enum ibmvfc_fc_type fc_type;
394 char *name;
395} fc_type [] = {
396 { IBMVFC_FABRIC_REJECT, "fabric reject" },
397 { IBMVFC_PORT_REJECT, "port reject" },
398 { IBMVFC_LS_REJECT, "ELS reject" },
399 { IBMVFC_FABRIC_BUSY, "fabric busy" },
400 { IBMVFC_PORT_BUSY, "port busy" },
401 { IBMVFC_BASIC_REJECT, "basic reject" },
402};
403
404static const char *unknown_fc_type = "unknown fc type";
405
406/**
407 * ibmvfc_get_fc_type - Return the FC Type description text
408 * @status: FC Type error status
409 *
410 * Returns:
411 * error string
412 **/
413static const char *ibmvfc_get_fc_type(u16 status)
414{
415 int i;
416
417 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
418 if (fc_type[i].fc_type == status)
419 return fc_type[i].name;
420
421 return unknown_fc_type;
422}
423
424/**
425 * ibmvfc_set_tgt_action - Set the next init action for the target
426 * @tgt: ibmvfc target struct
427 * @action: action to perform
428 *
429 **/
430static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
431 enum ibmvfc_target_action action)
432{
433 switch (tgt->action) {
434 case IBMVFC_TGT_ACTION_DEL_RPORT:
d5da3040
BK		 435 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
436 tgt->action = action;
437 case IBMVFC_TGT_ACTION_DELETED_RPORT:
072b91f9
BK		 438 break;
439 default:
43c8da90
BK		 440 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
441 tgt->add_rport = 0;
072b91f9
BK		 442 tgt->action = action;
443 break;
444 }
445}
446
447/**
448 * ibmvfc_set_host_state - Set the state for the host
449 * @vhost: ibmvfc host struct
450 * @state: state to set host to
451 *
452 * Returns:
453 * 0 if state changed / non-zero if not changed
454 **/
455static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
456 enum ibmvfc_host_state state)
457{
458 int rc = 0;
459
460 switch (vhost->state) {
461 case IBMVFC_HOST_OFFLINE:
462 rc = -EINVAL;
463 break;
464 default:
465 vhost->state = state;
466 break;
f36cfe6a 467 }
072b91f9
BK		 468
469 return rc;
470}
471
472/**
473 * ibmvfc_set_host_action - Set the next init action for the host
474 * @vhost: ibmvfc host struct
475 * @action: action to perform
476 *
477 **/
478static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
479 enum ibmvfc_host_action action)
480{
481 switch (action) {
482 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
483 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
484 vhost->action = action;
485 break;
79111d08
BK		 486 case IBMVFC_HOST_ACTION_LOGO_WAIT:
487 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
488 vhost->action = action;
489 break;
072b91f9
BK		 490 case IBMVFC_HOST_ACTION_INIT_WAIT:
491 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
492 vhost->action = action;
493 break;
494 case IBMVFC_HOST_ACTION_QUERY:
495 switch (vhost->action) {
496 case IBMVFC_HOST_ACTION_INIT_WAIT:
497 case IBMVFC_HOST_ACTION_NONE:
43c8da90 498 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 499 vhost->action = action;
500 break;
501 default:
502 break;
f36cfe6a 503 }
072b91f9
BK		 504 break;
505 case IBMVFC_HOST_ACTION_TGT_INIT:
506 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
507 vhost->action = action;
508 break;
509 case IBMVFC_HOST_ACTION_INIT:
510 case IBMVFC_HOST_ACTION_TGT_DEL:
73ee5d86
BK		 511 switch (vhost->action) {
512 case IBMVFC_HOST_ACTION_RESET:
513 case IBMVFC_HOST_ACTION_REENABLE:
514 break;
515 default:
516 vhost->action = action;
517 break;
f36cfe6a 518 }
73ee5d86
BK		 519 break;
520 case IBMVFC_HOST_ACTION_LOGO:
072b91f9 521 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 522 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 523 case IBMVFC_HOST_ACTION_NONE:
73ee5d86
BK		 524 case IBMVFC_HOST_ACTION_RESET:
525 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 526 default:
527 vhost->action = action;
528 break;
f36cfe6a 529 }
072b91f9
BK		 530}
531
532/**
533 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
534 * @vhost: ibmvfc host struct
535 *
536 * Return value:
537 * nothing
538 **/
539static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
540{
541 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 542 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
543 scsi_block_requests(vhost->host);
544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
545 }
072b91f9
BK		 546 } else
547 vhost->reinit = 1;
548
549 wake_up(&vhost->work_wait_q);
550}
551
552/**
553 * ibmvfc_link_down - Handle a link down event from the adapter
554 * @vhost: ibmvfc host struct
555 * @state: ibmvfc host state to enter
556 *
557 **/
558static void ibmvfc_link_down(struct ibmvfc_host *vhost,
559 enum ibmvfc_host_state state)
560{
561 struct ibmvfc_target *tgt;
562
563 ENTER;
564 scsi_block_requests(vhost->host);
565 list_for_each_entry(tgt, &vhost->targets, queue)
566 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
567 ibmvfc_set_host_state(vhost, state);
568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
569 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
570 wake_up(&vhost->work_wait_q);
571 LEAVE;
572}
573
574/**
575 * ibmvfc_init_host - Start host initialization
576 * @vhost: ibmvfc host struct
577 *
578 * Return value:
579 * nothing
580 **/
861890c6 581static void ibmvfc_init_host(struct ibmvfc_host *vhost)
072b91f9
BK		 582{
583 struct ibmvfc_target *tgt;
584
585 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82 586 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 587 dev_err(vhost->dev,
588 "Host initialization retries exceeded. Taking adapter offline\n");
589 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
590 return;
591 }
592 }
593
594 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
861890c6
BK		 595 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
596 vhost->async_crq.cur = 0;
cf6f10d7 597
072b91f9 598 list_for_each_entry(tgt, &vhost->targets, queue)
5e47167b 599 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 600 scsi_block_requests(vhost->host);
601 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
602 vhost->job_step = ibmvfc_npiv_login;
603 wake_up(&vhost->work_wait_q);
604 }
605}
606
607/**
608 * ibmvfc_send_crq - Send a CRQ
609 * @vhost: ibmvfc host struct
610 * @word1: the first 64 bits of the data
611 * @word2: the second 64 bits of the data
612 *
613 * Return value:
614 * 0 on success / other on failure
615 **/
616static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
617{
618 struct vio_dev *vdev = to_vio_dev(vhost->dev);
619 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
620}
621
622/**
623 * ibmvfc_send_crq_init - Send a CRQ init message
624 * @vhost: ibmvfc host struct
625 *
626 * Return value:
627 * 0 on success / other on failure
628 **/
629static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
630{
631 ibmvfc_dbg(vhost, "Sending CRQ init\n");
632 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
633}
634
635/**
636 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
637 * @vhost: ibmvfc host struct
638 *
639 * Return value:
640 * 0 on success / other on failure
641 **/
642static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
643{
644 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
645 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
646}
647
648/**
649 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
650 * @vhost: ibmvfc host struct
651 *
652 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
653 * the crq with the hypervisor.
654 **/
655static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
656{
73ee5d86 657 long rc = 0;
072b91f9
BK		 658 struct vio_dev *vdev = to_vio_dev(vhost->dev);
659 struct ibmvfc_crq_queue *crq = &vhost->crq;
660
661 ibmvfc_dbg(vhost, "Releasing CRQ\n");
662 free_irq(vdev->irq, vhost);
039a0898 663 tasklet_kill(&vhost->tasklet);
072b91f9 664 do {
73ee5d86
BK		 665 if (rc)
666 msleep(100);
072b91f9
BK		 667 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
668 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
669
670 vhost->state = IBMVFC_NO_CRQ;
79111d08 671 vhost->logged_in = 0;
072b91f9
BK		 672 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
673 free_page((unsigned long)crq->msgs);
674}
675
676/**
677 * ibmvfc_reenable_crq_queue - reenables the CRQ
678 * @vhost: ibmvfc host struct
679 *
680 * Return value:
681 * 0 on success / other on failure
682 **/
683static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
684{
73ee5d86 685 int rc = 0;
072b91f9
BK		 686 struct vio_dev *vdev = to_vio_dev(vhost->dev);
687
688 /* Re-enable the CRQ */
689 do {
73ee5d86
BK		 690 if (rc)
691 msleep(100);
072b91f9
BK		 692 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
693 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
694
695 if (rc)
696 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
697
698 return rc;
699}
700
701/**
702 * ibmvfc_reset_crq - resets a crq after a failure
703 * @vhost: ibmvfc host struct
704 *
705 * Return value:
706 * 0 on success / other on failure
707 **/
708static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
709{
73ee5d86
BK		 710 int rc = 0;
711 unsigned long flags;
072b91f9
BK		 712 struct vio_dev *vdev = to_vio_dev(vhost->dev);
713 struct ibmvfc_crq_queue *crq = &vhost->crq;
714
715 /* Close the CRQ */
716 do {
73ee5d86
BK		 717 if (rc)
718 msleep(100);
072b91f9
BK		 719 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
720 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
721
73ee5d86 722 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 723 vhost->state = IBMVFC_NO_CRQ;
79111d08 724 vhost->logged_in = 0;
072b91f9
BK		 725
726 /* Clean out the queue */
727 memset(crq->msgs, 0, PAGE_SIZE);
728 crq->cur = 0;
729
730 /* And re-open it again */
731 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
732 crq->msg_token, PAGE_SIZE);
733
734 if (rc == H_CLOSED)
735 /* Adapter is good, but other end is not ready */
736 dev_warn(vhost->dev, "Partner adapter not ready\n");
737 else if (rc != 0)
738 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
73ee5d86 739 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 740
741 return rc;
742}
743
744/**
745 * ibmvfc_valid_event - Determines if event is valid.
746 * @pool: event_pool that contains the event
747 * @evt: ibmvfc event to be checked for validity
748 *
749 * Return value:
750 * 1 if event is valid / 0 if event is not valid
751 **/
752static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
753 struct ibmvfc_event *evt)
754{
755 int index = evt - pool->events;
756 if (index < 0 || index >= pool->size) /* outside of bounds */
757 return 0;
758 if (evt != pool->events + index) /* unaligned */
759 return 0;
760 return 1;
761}
762
763/**
764 * ibmvfc_free_event - Free the specified event
765 * @evt: ibmvfc_event to be freed
766 *
767 **/
768static void ibmvfc_free_event(struct ibmvfc_event *evt)
769{
770 struct ibmvfc_host *vhost = evt->vhost;
771 struct ibmvfc_event_pool *pool = &vhost->pool;
772
773 BUG_ON(!ibmvfc_valid_event(pool, evt));
774 BUG_ON(atomic_inc_return(&evt->free) != 1);
775 list_add_tail(&evt->queue, &vhost->free);
776}
777
778/**
779 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
780 * @evt: ibmvfc event struct
781 *
782 * This function does not setup any error status, that must be done
783 * before this function gets called.
784 **/
785static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
786{
787 struct scsi_cmnd *cmnd = evt->cmnd;
788
789 if (cmnd) {
790 scsi_dma_unmap(cmnd);
791 cmnd->scsi_done(cmnd);
792 }
793
ad8dcffa
BK		 794 if (evt->eh_comp)
795 complete(evt->eh_comp);
796
072b91f9
BK		 797 ibmvfc_free_event(evt);
798}
799
800/**
801 * ibmvfc_fail_request - Fail request with specified error code
802 * @evt: ibmvfc event struct
803 * @error_code: error code to fail request with
804 *
805 * Return value:
806 * none
807 **/
808static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
809{
810 if (evt->cmnd) {
811 evt->cmnd->result = (error_code << 16);
812 evt->done = ibmvfc_scsi_eh_done;
813 } else
0aab6c3f 814 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
072b91f9
BK		 815
816 list_del(&evt->queue);
817 del_timer(&evt->timer);
818 ibmvfc_trc_end(evt);
819 evt->done(evt);
820}
821
822/**
823 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
824 * @vhost: ibmvfc host struct
825 * @error_code: error code to fail requests with
826 *
827 * Return value:
828 * none
829 **/
830static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
831{
832 struct ibmvfc_event *evt, *pos;
833
834 ibmvfc_dbg(vhost, "Purging all requests\n");
835 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
836 ibmvfc_fail_request(evt, error_code);
837}
838
839/**
79111d08 840 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
072b91f9
BK		 841 * @vhost: struct ibmvfc host to reset
842 **/
79111d08 843static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
072b91f9 844{
072b91f9 845 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 846 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
847 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
072b91f9
BK		 848}
849
850/**
79111d08 851 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
072b91f9
BK		 852 * @vhost: struct ibmvfc host to reset
853 **/
79111d08
BK		 854static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
855{
856 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
857 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
858 scsi_block_requests(vhost->host);
859 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
860 vhost->job_step = ibmvfc_npiv_logout;
861 wake_up(&vhost->work_wait_q);
862 } else
863 ibmvfc_hard_reset_host(vhost);
864}
865
866/**
867 * ibmvfc_reset_host - Reset the connection to the server
868 * @vhost: ibmvfc host struct
869 **/
072b91f9
BK		 870static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
871{
872 unsigned long flags;
873
874 spin_lock_irqsave(vhost->host->host_lock, flags);
875 __ibmvfc_reset_host(vhost);
876 spin_unlock_irqrestore(vhost->host->host_lock, flags);
877}
878
879/**
880 * ibmvfc_retry_host_init - Retry host initialization if allowed
881 * @vhost: ibmvfc host struct
882 *
7d0e4622
BK		 883 * Returns: 1 if init will be retried / 0 if not
884 *
072b91f9 885 **/
7d0e4622 886static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
072b91f9 887{
7d0e4622
BK		 888 int retry = 0;
889
072b91f9 890 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82
BK		 891 vhost->delay_init = 1;
892 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 893 dev_err(vhost->dev,
894 "Host initialization retries exceeded. Taking adapter offline\n");
895 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1c41fa82 896 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
072b91f9 897 __ibmvfc_reset_host(vhost);
7d0e4622 898 else {
072b91f9 899 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
7d0e4622
BK		 900 retry = 1;
901 }
072b91f9
BK		 902 }
903
904 wake_up(&vhost->work_wait_q);
7d0e4622 905 return retry;
072b91f9
BK		 906}
907
908/**
b3c10489 909 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 910 * @starget: scsi target struct
911 *
912 * Return value:
913 * ibmvfc_target struct / NULL if not found
914 **/
b3c10489 915static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 916{
917 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
918 struct ibmvfc_host *vhost = shost_priv(shost);
919 struct ibmvfc_target *tgt;
920
921 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 922 if (tgt->target_id == starget->id) {
923 kref_get(&tgt->kref);
072b91f9 924 return tgt;
b3c10489 925 }
072b91f9
BK		 926 return NULL;
927}
928
929/**
b3c10489 930 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 931 * @starget: scsi target struct
932 *
933 * Return value:
934 * ibmvfc_target struct / NULL if not found
935 **/
b3c10489 936static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 937{
938 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
939 struct ibmvfc_target *tgt;
940 unsigned long flags;
941
942 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 943 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 944 spin_unlock_irqrestore(shost->host_lock, flags);
945 return tgt;
946}
947
948/**
949 * ibmvfc_get_host_speed - Get host port speed
950 * @shost: scsi host struct
951 *
952 * Return value:
953 * none
954 **/
955static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
956{
957 struct ibmvfc_host *vhost = shost_priv(shost);
958 unsigned long flags;
959
960 spin_lock_irqsave(shost->host_lock, flags);
961 if (vhost->state == IBMVFC_ACTIVE) {
0aab6c3f 962 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
072b91f9
BK		 963 case 1:
964 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
965 break;
966 case 2:
967 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
968 break;
969 case 4:
970 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
971 break;
972 case 8:
973 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
974 break;
975 case 10:
976 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
977 break;
978 case 16:
979 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
980 break;
981 default:
775a42ec 982 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
0aab6c3f 983 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
072b91f9
BK		 984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
985 break;
986 }
987 } else
988 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
989 spin_unlock_irqrestore(shost->host_lock, flags);
990}
991
992/**
993 * ibmvfc_get_host_port_state - Get host port state
994 * @shost: scsi host struct
995 *
996 * Return value:
997 * none
998 **/
999static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1000{
1001 struct ibmvfc_host *vhost = shost_priv(shost);
1002 unsigned long flags;
1003
1004 spin_lock_irqsave(shost->host_lock, flags);
1005 switch (vhost->state) {
1006 case IBMVFC_INITIALIZING:
1007 case IBMVFC_ACTIVE:
1008 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1009 break;
1010 case IBMVFC_LINK_DOWN:
1011 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1012 break;
1013 case IBMVFC_LINK_DEAD:
1014 case IBMVFC_HOST_OFFLINE:
1015 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1016 break;
1017 case IBMVFC_HALTED:
1018 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1019 break;
0ae808e0
BK		 1020 case IBMVFC_NO_CRQ:
1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1022 break;
072b91f9
BK		 1023 default:
1024 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1025 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1026 break;
1027 }
1028 spin_unlock_irqrestore(shost->host_lock, flags);
1029}
1030
1031/**
1032 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1033 * @rport: rport struct
1034 * @timeout: timeout value
1035 *
1036 * Return value:
1037 * none
1038 **/
1039static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1040{
1041 if (timeout)
1042 rport->dev_loss_tmo = timeout;
1043 else
1044 rport->dev_loss_tmo = 1;
1045}
1046
b3c10489
BK		 1047/**
1048 * ibmvfc_release_tgt - Free memory allocated for a target
1049 * @kref: kref struct
1050 *
1051 **/
1052static void ibmvfc_release_tgt(struct kref *kref)
1053{
1054 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1055 kfree(tgt);
1056}
1057
072b91f9
BK		 1058/**
1059 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1060 * @starget: scsi target struct
1061 *
1062 * Return value:
1063 * none
1064 **/
1065static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1066{
b3c10489 1067 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1068 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1069 if (tgt)
1070 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1071}
1072
1073/**
1074 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1075 * @starget: scsi target struct
1076 *
1077 * Return value:
1078 * none
1079 **/
1080static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1081{
b3c10489 1082 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1083 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1084 if (tgt)
1085 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1086}
1087
1088/**
1089 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1090 * @starget: scsi target struct
1091 *
1092 * Return value:
1093 * none
1094 **/
1095static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1096{
b3c10489 1097 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1098 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1099 if (tgt)
1100 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1101}
1102
1103/**
1104 * ibmvfc_wait_while_resetting - Wait while the host resets
1105 * @vhost: ibmvfc host struct
1106 *
1107 * Return value:
1108 * 0 on success / other on failure
1109 **/
1110static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1111{
1112 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1113 ((vhost->state == IBMVFC_ACTIVE ||
1114 vhost->state == IBMVFC_HOST_OFFLINE ||
1115 vhost->state == IBMVFC_LINK_DEAD) &&
1116 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1117 (init_timeout * HZ));
1118
1119 return timeout ? 0 : -EIO;
1120}
1121
1122/**
1123 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1124 * @shost: scsi host struct
1125 *
1126 * Return value:
1127 * 0 on success / other on failure
1128 **/
1129static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1130{
1131 struct ibmvfc_host *vhost = shost_priv(shost);
1132
1133 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1134 ibmvfc_reset_host(vhost);
1135 return ibmvfc_wait_while_resetting(vhost);
1136}
1137
1138/**
1139 * ibmvfc_gather_partition_info - Gather info about the LPAR
1140 *
1141 * Return value:
1142 * none
1143 **/
1144static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1145{
1146 struct device_node *rootdn;
1147 const char *name;
1148 const unsigned int *num;
1149
1150 rootdn = of_find_node_by_path("/");
1151 if (!rootdn)
1152 return;
1153
1154 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1155 if (name)
1156 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1157 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1158 if (num)
1159 vhost->partition_number = *num;
1160 of_node_put(rootdn);
1161}
1162
1163/**
1164 * ibmvfc_set_login_info - Setup info for NPIV login
1165 * @vhost: ibmvfc host struct
1166 *
1167 * Return value:
1168 * none
1169 **/
1170static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1171{
1172 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
61c7a080 1173 struct device_node *of_node = vhost->dev->of_node;
072b91f9
BK		 1174 const char *location;
1175
1176 memset(login_info, 0, sizeof(*login_info));
1177
0aab6c3f
TD		 1178 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1179 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1180 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1181 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1182 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1183 login_info->vfc_frame_version = cpu_to_be32(1);
1184 login_info->fcp_version = cpu_to_be16(3);
1185 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
072b91f9 1186 if (vhost->client_migrated)
0aab6c3f 1187 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
072b91f9 1188
0aab6c3f
TD		 1189 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1190 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1191 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1192 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
072b91f9
BK		 1193 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1194 strncpy(login_info->device_name,
71610f55 1195 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
072b91f9
BK		 1196
1197 location = of_get_property(of_node, "ibm,loc-code", NULL);
71610f55 1198 location = location ? location : dev_name(vhost->dev);
072b91f9
BK		 1199 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1200}
1201
1202/**
1203 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1204 * @vhost: ibmvfc host who owns the event pool
1205 *
1206 * Returns zero on success.
1207 **/
1208static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1209{
1210 int i;
1211 struct ibmvfc_event_pool *pool = &vhost->pool;
1212
1213 ENTER;
1214 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1215 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1216 if (!pool->events)
1217 return -ENOMEM;
1218
1219 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1220 pool->size * sizeof(*pool->iu_storage),
1221 &pool->iu_token, 0);
1222
1223 if (!pool->iu_storage) {
1224 kfree(pool->events);
1225 return -ENOMEM;
1226 }
1227
1228 for (i = 0; i < pool->size; ++i) {
1229 struct ibmvfc_event *evt = &pool->events[i];
1230 atomic_set(&evt->free, 1);
1231 evt->crq.valid = 0x80;
0aab6c3f 1232 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
072b91f9
BK		 1233 evt->xfer_iu = pool->iu_storage + i;
1234 evt->vhost = vhost;
1235 evt->ext_list = NULL;
1236 list_add_tail(&evt->queue, &vhost->free);
1237 }
1238
1239 LEAVE;
1240 return 0;
1241}
1242
1243/**
1244 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1245 * @vhost: ibmvfc host who owns the event pool
1246 *
1247 **/
1248static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1249{
1250 int i;
1251 struct ibmvfc_event_pool *pool = &vhost->pool;
1252
1253 ENTER;
1254 for (i = 0; i < pool->size; ++i) {
1255 list_del(&pool->events[i].queue);
1256 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1257 if (pool->events[i].ext_list)
1258 dma_pool_free(vhost->sg_pool,
1259 pool->events[i].ext_list,
1260 pool->events[i].ext_list_token);
1261 }
1262
1263 kfree(pool->events);
1264 dma_free_coherent(vhost->dev,
1265 pool->size * sizeof(*pool->iu_storage),
1266 pool->iu_storage, pool->iu_token);
1267 LEAVE;
1268}
1269
1270/**
1271 * ibmvfc_get_event - Gets the next free event in pool
1272 * @vhost: ibmvfc host struct
1273 *
1274 * Returns a free event from the pool.
1275 **/
1276static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1277{
1278 struct ibmvfc_event *evt;
1279
1280 BUG_ON(list_empty(&vhost->free));
1281 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1282 atomic_set(&evt->free, 0);
1283 list_del(&evt->queue);
1284 return evt;
1285}
1286
1287/**
1288 * ibmvfc_init_event - Initialize fields in an event struct that are always
1289 * required.
1290 * @evt: The event
1291 * @done: Routine to call when the event is responded to
1292 * @format: SRP or MAD format
1293 **/
1294static void ibmvfc_init_event(struct ibmvfc_event *evt,
1295 void (*done) (struct ibmvfc_event *), u8 format)
1296{
1297 evt->cmnd = NULL;
1298 evt->sync_iu = NULL;
1299 evt->crq.format = format;
1300 evt->done = done;
ad8dcffa 1301 evt->eh_comp = NULL;
072b91f9
BK		 1302}
1303
1304/**
1305 * ibmvfc_map_sg_list - Initialize scatterlist
1306 * @scmd: scsi command struct
1307 * @nseg: number of scatterlist segments
1308 * @md: memory descriptor list to initialize
1309 **/
1310static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1311 struct srp_direct_buf *md)
1312{
1313 int i;
1314 struct scatterlist *sg;
1315
1316 scsi_for_each_sg(scmd, sg, nseg, i) {
0aab6c3f
TD		 1317 md[i].va = cpu_to_be64(sg_dma_address(sg));
1318 md[i].len = cpu_to_be32(sg_dma_len(sg));
072b91f9
BK		 1319 md[i].key = 0;
1320 }
1321}
1322
1323/**
1324 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
91ebc1fa 1325 * @scmd: struct scsi_cmnd with the scatterlist
072b91f9
BK		 1326 * @evt: ibmvfc event struct
1327 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1328 * @dev: device for which to map dma memory
1329 *
1330 * Returns:
1331 * 0 on success / non-zero on failure
1332 **/
1333static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1334 struct ibmvfc_event *evt,
1335 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1336{
1337
1338 int sg_mapped;
1339 struct srp_direct_buf *data = &vfc_cmd->ioba;
1340 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1341
a6104b1e
TD		 1342 if (cls3_error)
1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1344
072b91f9
BK		 1345 sg_mapped = scsi_dma_map(scmd);
1346 if (!sg_mapped) {
0aab6c3f 1347 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
072b91f9
BK		 1348 return 0;
1349 } else if (unlikely(sg_mapped < 0)) {
1350 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1351 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1352 return sg_mapped;
1353 }
1354
1355 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
0aab6c3f 1356 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
072b91f9
BK		 1357 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1358 } else {
0aab6c3f 1359 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
072b91f9
BK		 1360 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1361 }
1362
1363 if (sg_mapped == 1) {
1364 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1365 return 0;
1366 }
1367
0aab6c3f 1368 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
072b91f9
BK		 1369
1370 if (!evt->ext_list) {
1371 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1372 &evt->ext_list_token);
1373
1374 if (!evt->ext_list) {
64b840dd
BK		 1375 scsi_dma_unmap(scmd);
1376 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1377 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
072b91f9
BK		 1378 return -ENOMEM;
1379 }
1380 }
1381
1382 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1383
0aab6c3f
TD		 1384 data->va = cpu_to_be64(evt->ext_list_token);
1385 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
072b91f9
BK		 1386 data->key = 0;
1387 return 0;
1388}
1389
1390/**
1391 * ibmvfc_timeout - Internal command timeout handler
1392 * @evt: struct ibmvfc_event that timed out
1393 *
1394 * Called when an internally generated command times out
1395 **/
9a5d04fc 1396static void ibmvfc_timeout(struct timer_list *t)
072b91f9 1397{
9a5d04fc 1398 struct ibmvfc_event *evt = from_timer(evt, t, timer);
072b91f9
BK		 1399 struct ibmvfc_host *vhost = evt->vhost;
1400 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1401 ibmvfc_reset_host(vhost);
1402}
1403
1404/**
1405 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1406 * @evt: event to be sent
1407 * @vhost: ibmvfc host struct
1408 * @timeout: timeout in seconds - 0 means do not time command
1409 *
1410 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1411 **/
1412static int ibmvfc_send_event(struct ibmvfc_event *evt,
1413 struct ibmvfc_host *vhost, unsigned long timeout)
1414{
0aab6c3f 1415 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
072b91f9
BK		 1416 int rc;
1417
1418 /* Copy the IU into the transfer area */
1419 *evt->xfer_iu = evt->iu;
1420 if (evt->crq.format == IBMVFC_CMD_FORMAT)
0aab6c3f 1421 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
072b91f9 1422 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
0aab6c3f 1423 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
072b91f9
BK		 1424 else
1425 BUG();
1426
1427 list_add_tail(&evt->queue, &vhost->sent);
9a5d04fc 1428 timer_setup(&evt->timer, ibmvfc_timeout, 0);
072b91f9
BK		 1429
1430 if (timeout) {
072b91f9 1431 evt->timer.expires = jiffies + (timeout * HZ);
072b91f9
BK		 1432 add_timer(&evt->timer);
1433 }
1434
a528ab7a
BK		 1435 mb();
1436
0aab6c3f
TD		 1437 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1438 be64_to_cpu(crq_as_u64[1])))) {
072b91f9
BK		 1439 list_del(&evt->queue);
1440 del_timer(&evt->timer);
1441
1442 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1443 * Firmware will send a CRQ with a transport event (0xFF) to
1444 * tell this client what has happened to the transport. This
1445 * will be handled in ibmvfc_handle_crq()
1446 */
1447 if (rc == H_CLOSED) {
1448 if (printk_ratelimit())
1449 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1450 if (evt->cmnd)
1451 scsi_dma_unmap(evt->cmnd);
1452 ibmvfc_free_event(evt);
1453 return SCSI_MLQUEUE_HOST_BUSY;
1454 }
1455
1456 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1457 if (evt->cmnd) {
1458 evt->cmnd->result = DID_ERROR << 16;
1459 evt->done = ibmvfc_scsi_eh_done;
1460 } else
0aab6c3f 1461 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
072b91f9
BK		 1462
1463 evt->done(evt);
1464 } else
1465 ibmvfc_trc_start(evt);
1466
1467 return 0;
1468}
1469
1470/**
1471 * ibmvfc_log_error - Log an error for the failed command if appropriate
1472 * @evt: ibmvfc event to log
1473 *
1474 **/
1475static void ibmvfc_log_error(struct ibmvfc_event *evt)
1476{
1477 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1478 struct ibmvfc_host *vhost = evt->vhost;
1479 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1480 struct scsi_cmnd *cmnd = evt->cmnd;
1481 const char *err = unknown_error;
0aab6c3f 1482 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 1483 int logerr = 0;
1484 int rsp_code = 0;
1485
1486 if (index >= 0) {
1487 logerr = cmd_status[index].log;
1488 err = cmd_status[index].name;
1489 }
1490
0ae808e0 1491 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1492 return;
1493
1494 if (rsp->flags & FCP_RSP_LEN_VALID)
1495 rsp_code = rsp->data.info.rsp_code;
1496
6dc6a944 1497 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
072b91f9
BK		 1498 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1499 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error,
1500 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1501}
1502
6d29cc56
BK		 1503/**
1504 * ibmvfc_relogin - Log back into the specified device
1505 * @sdev: scsi device struct
1506 *
1507 **/
1508static void ibmvfc_relogin(struct scsi_device *sdev)
1509{
1510 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1511 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1512 struct ibmvfc_target *tgt;
1513
1514 list_for_each_entry(tgt, &vhost->targets, queue) {
1515 if (rport == tgt->rport) {
1516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1517 break;
1518 }
1519 }
1520
1521 ibmvfc_reinit_host(vhost);
1522}
1523
072b91f9
BK		 1524/**
1525 * ibmvfc_scsi_done - Handle responses from commands
1526 * @evt: ibmvfc event to be handled
1527 *
1528 * Used as a callback when sending scsi cmds.
1529 **/
1530static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1531{
1532 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1533 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1534 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d 1535 u32 rsp_len = 0;
0aab6c3f 1536 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
072b91f9
BK		 1537
1538 if (cmnd) {
0aab6c3f
TD		 1539 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1540 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
072b91f9 1541 else if (rsp->flags & FCP_RESID_UNDER)
0aab6c3f 1542 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
072b91f9
BK		 1543 else
1544 scsi_set_resid(cmnd, 0);
1545
1546 if (vfc_cmd->status) {
1547 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1548
1549 if (rsp->flags & FCP_RSP_LEN_VALID)
0aab6c3f 1550 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 1551 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1552 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1553 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9 1554 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
0aab6c3f
TD		 1555 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1556 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
6d29cc56 1557 ibmvfc_relogin(cmnd->device);
072b91f9 1558
50119dad
BK		 1559 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1560 cmnd->result = (DID_ERROR << 16);
1561
072b91f9
BK		 1562 ibmvfc_log_error(evt);
1563 }
1564
1565 if (!cmnd->result &&
1566 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1567 cmnd->result = (DID_ERROR << 16);
1568
1569 scsi_dma_unmap(cmnd);
1570 cmnd->scsi_done(cmnd);
1571 }
1572
ad8dcffa
BK		 1573 if (evt->eh_comp)
1574 complete(evt->eh_comp);
1575
072b91f9
BK		 1576 ibmvfc_free_event(evt);
1577}
1578
1579/**
1580 * ibmvfc_host_chkready - Check if the host can accept commands
1581 * @vhost: struct ibmvfc host
1582 *
1583 * Returns:
1584 * 1 if host can accept command / 0 if not
1585 **/
1586static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1587{
1588 int result = 0;
1589
1590 switch (vhost->state) {
1591 case IBMVFC_LINK_DEAD:
1592 case IBMVFC_HOST_OFFLINE:
1593 result = DID_NO_CONNECT << 16;
1594 break;
1595 case IBMVFC_NO_CRQ:
1596 case IBMVFC_INITIALIZING:
1597 case IBMVFC_HALTED:
1598 case IBMVFC_LINK_DOWN:
1599 result = DID_REQUEUE << 16;
1600 break;
1601 case IBMVFC_ACTIVE:
1602 result = 0;
1603 break;
f36cfe6a 1604 }
072b91f9
BK		 1605
1606 return result;
1607}
1608
1609/**
1610 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1611 * @cmnd: struct scsi_cmnd to be executed
1612 * @done: Callback function to be called when cmnd is completed
1613 *
1614 * Returns:
1615 * 0 on success / other on failure
1616 **/
f281233d 1617static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
072b91f9
BK		 1618 void (*done) (struct scsi_cmnd *))
1619{
1620 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1621 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1622 struct ibmvfc_cmd *vfc_cmd;
1623 struct ibmvfc_event *evt;
072b91f9
BK		 1624 int rc;
1625
1626 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1627 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1628 cmnd->result = rc;
1629 done(cmnd);
1630 return 0;
1631 }
1632
1633 cmnd->result = (DID_OK << 16);
1634 evt = ibmvfc_get_event(vhost);
1635 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1636 evt->cmnd = cmnd;
1637 cmnd->scsi_done = done;
1638 vfc_cmd = &evt->iu.cmd;
1639 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
0aab6c3f
TD		 1640 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1641 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1642 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1643 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1644 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1645 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1646 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1647 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
072b91f9
BK		 1648 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1649 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1650
50668633
CH		 1651 if (cmnd->flags & SCMD_TAGGED) {
1652 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1653 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
072b91f9
BK		 1654 }
1655
1656 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1657 return ibmvfc_send_event(evt, vhost, 0);
1658
1659 ibmvfc_free_event(evt);
1660 if (rc == -ENOMEM)
1661 return SCSI_MLQUEUE_HOST_BUSY;
1662
1663 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1664 scmd_printk(KERN_ERR, cmnd,
1665 "Failed to map DMA buffer for command. rc=%d\n", rc);
1666
1667 cmnd->result = DID_ERROR << 16;
1668 done(cmnd);
1669 return 0;
1670}
1671
f281233d
JG		 1672static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1673
072b91f9
BK		 1674/**
1675 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1676 * @evt: ibmvfc event struct
1677 *
1678 **/
1679static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1680{
1681 /* copy the response back */
1682 if (evt->sync_iu)
1683 *evt->sync_iu = *evt->xfer_iu;
1684
1685 complete(&evt->comp);
1686}
1687
d31429e1
BK		 1688/**
1689 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1690 * @evt: struct ibmvfc_event
1691 *
1692 **/
1693static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1694{
1695 struct ibmvfc_host *vhost = evt->vhost;
1696
1697 ibmvfc_free_event(evt);
1698 vhost->aborting_passthru = 0;
1699 dev_info(vhost->dev, "Passthru command cancelled\n");
1700}
1701
1702/**
1703 * ibmvfc_bsg_timeout - Handle a BSG timeout
75cc8cfc 1704 * @job: struct bsg_job that timed out
d31429e1
BK		 1705 *
1706 * Returns:
1707 * 0 on success / other on failure
1708 **/
75cc8cfc 1709static int ibmvfc_bsg_timeout(struct bsg_job *job)
d31429e1 1710{
cd21c605 1711 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
d31429e1
BK		 1712 unsigned long port_id = (unsigned long)job->dd_data;
1713 struct ibmvfc_event *evt;
1714 struct ibmvfc_tmf *tmf;
1715 unsigned long flags;
1716 int rc;
1717
1718 ENTER;
1719 spin_lock_irqsave(vhost->host->host_lock, flags);
1720 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1721 __ibmvfc_reset_host(vhost);
1722 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1723 return 0;
1724 }
1725
1726 vhost->aborting_passthru = 1;
1727 evt = ibmvfc_get_event(vhost);
1728 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1729
1730 tmf = &evt->iu.tmf;
1731 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1732 tmf->common.version = cpu_to_be32(1);
1733 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1734 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1735 tmf->scsi_id = cpu_to_be64(port_id);
1736 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1737 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
d31429e1
BK		 1738 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1739
1740 if (rc != 0) {
1741 vhost->aborting_passthru = 0;
1742 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1743 rc = -EIO;
1744 } else
1745 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1746 port_id);
1747
1748 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1749
1750 LEAVE;
1751 return rc;
1752}
1753
1754/**
1755 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1756 * @vhost: struct ibmvfc_host to send command
1757 * @port_id: port ID to send command
1758 *
1759 * Returns:
1760 * 0 on success / other on failure
1761 **/
1762static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1763{
1764 struct ibmvfc_port_login *plogi;
1765 struct ibmvfc_target *tgt;
1766 struct ibmvfc_event *evt;
1767 union ibmvfc_iu rsp_iu;
1768 unsigned long flags;
1769 int rc = 0, issue_login = 1;
1770
1771 ENTER;
1772 spin_lock_irqsave(vhost->host->host_lock, flags);
1773 list_for_each_entry(tgt, &vhost->targets, queue) {
1774 if (tgt->scsi_id == port_id) {
1775 issue_login = 0;
1776 break;
1777 }
1778 }
1779
1780 if (!issue_login)
1781 goto unlock_out;
1782 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1783 goto unlock_out;
1784
1785 evt = ibmvfc_get_event(vhost);
1786 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1787 plogi = &evt->iu.plogi;
1788 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 1789 plogi->common.version = cpu_to_be32(1);
1790 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1791 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1792 plogi->scsi_id = cpu_to_be64(port_id);
d31429e1
BK		 1793 evt->sync_iu = &rsp_iu;
1794 init_completion(&evt->comp);
1795
1796 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1797 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1798
1799 if (rc)
1800 return -EIO;
1801
1802 wait_for_completion(&evt->comp);
1803
1804 if (rsp_iu.plogi.common.status)
1805 rc = -EIO;
1806
1807 spin_lock_irqsave(vhost->host->host_lock, flags);
1808 ibmvfc_free_event(evt);
1809unlock_out:
1810 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1811 LEAVE;
1812 return rc;
1813}
1814
1815/**
1816 * ibmvfc_bsg_request - Handle a BSG request
75cc8cfc 1817 * @job: struct bsg_job to be executed
d31429e1
BK		 1818 *
1819 * Returns:
1820 * 0 on success / other on failure
1821 **/
75cc8cfc 1822static int ibmvfc_bsg_request(struct bsg_job *job)
d31429e1 1823{
cd21c605 1824 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1d69b122 1825 struct fc_rport *rport = fc_bsg_to_rport(job);
d31429e1
BK		 1826 struct ibmvfc_passthru_mad *mad;
1827 struct ibmvfc_event *evt;
1828 union ibmvfc_iu rsp_iu;
1829 unsigned long flags, port_id = -1;
01e0e15c
JT		 1830 struct fc_bsg_request *bsg_request = job->request;
1831 struct fc_bsg_reply *bsg_reply = job->reply;
1832 unsigned int code = bsg_request->msgcode;
d31429e1
BK		 1833 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1834 u32 fc_flags, rsp_len;
1835
1836 ENTER;
01e0e15c 1837 bsg_reply->reply_payload_rcv_len = 0;
d31429e1
BK		 1838 if (rport)
1839 port_id = rport->port_id;
1840
1841 switch (code) {
1842 case FC_BSG_HST_ELS_NOLOGIN:
01e0e15c
JT		 1843 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
1844 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
1845 bsg_request->rqst_data.h_els.port_id[2];
d31429e1
BK		 1846 case FC_BSG_RPT_ELS:
1847 fc_flags = IBMVFC_FC_ELS;
1848 break;
1849 case FC_BSG_HST_CT:
1850 issue_login = 1;
01e0e15c
JT		 1851 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
1852 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
1853 bsg_request->rqst_data.h_ct.port_id[2];
d31429e1
BK		 1854 case FC_BSG_RPT_CT:
1855 fc_flags = IBMVFC_FC_CT_IU;
1856 break;
1857 default:
1858 return -ENOTSUPP;
f36cfe6a 1859 }
d31429e1
BK		 1860
1861 if (port_id == -1)
1862 return -EINVAL;
1863 if (!mutex_trylock(&vhost->passthru_mutex))
1864 return -EBUSY;
1865
1866 job->dd_data = (void *)port_id;
1867 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1868 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1869
1870 if (!req_seg) {
1871 mutex_unlock(&vhost->passthru_mutex);
1872 return -ENOMEM;
1873 }
1874
1875 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1876 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1877
1878 if (!rsp_seg) {
1879 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1880 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1881 mutex_unlock(&vhost->passthru_mutex);
1882 return -ENOMEM;
1883 }
1884
1885 if (req_seg > 1 || rsp_seg > 1) {
1886 rc = -EINVAL;
1887 goto out;
1888 }
1889
1890 if (issue_login)
1891 rc = ibmvfc_bsg_plogi(vhost, port_id);
1892
1893 spin_lock_irqsave(vhost->host->host_lock, flags);
1894
1895 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1896 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1897 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1898 goto out;
1899 }
1900
1901 evt = ibmvfc_get_event(vhost);
1902 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1903 mad = &evt->iu.passthru;
1904
1905 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 1906 mad->common.version = cpu_to_be32(1);
1907 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1908 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1909
1910 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1911 offsetof(struct ibmvfc_passthru_mad, iu));
1912 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1913
1914 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1915 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1916 mad->iu.flags = cpu_to_be32(fc_flags);
1917 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1918
1919 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1920 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1921 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1922 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1923 mad->iu.scsi_id = cpu_to_be64(port_id);
1924 mad->iu.tag = cpu_to_be64((u64)evt);
1925 rsp_len = be32_to_cpu(mad->iu.rsp.len);
d31429e1
BK		 1926
1927 evt->sync_iu = &rsp_iu;
1928 init_completion(&evt->comp);
1929 rc = ibmvfc_send_event(evt, vhost, 0);
1930 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1931
1932 if (rc) {
1933 rc = -EIO;
1934 goto out;
1935 }
1936
1937 wait_for_completion(&evt->comp);
1938
1939 if (rsp_iu.passthru.common.status)
1940 rc = -EIO;
1941 else
01e0e15c 1942 bsg_reply->reply_payload_rcv_len = rsp_len;
d31429e1
BK		 1943
1944 spin_lock_irqsave(vhost->host->host_lock, flags);
1945 ibmvfc_free_event(evt);
1946 spin_unlock_irqrestore(vhost->host->host_lock, flags);
01e0e15c 1947 bsg_reply->result = rc;
06548160 1948 bsg_job_done(job, bsg_reply->result,
1abaede7 1949 bsg_reply->reply_payload_rcv_len);
d31429e1
BK		 1950 rc = 0;
1951out:
1952 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1953 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1954 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1955 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1956 mutex_unlock(&vhost->passthru_mutex);
1957 LEAVE;
1958 return rc;
1959}
1960
072b91f9
BK		 1961/**
1962 * ibmvfc_reset_device - Reset the device with the specified reset type
1963 * @sdev: scsi device to reset
1964 * @type: reset type
1965 * @desc: reset type description for log messages
1966 *
1967 * Returns:
1968 * 0 on success / other on failure
1969 **/
1970static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1971{
1972 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1973 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1974 struct ibmvfc_cmd *tmf;
50ed9a00 1975 struct ibmvfc_event *evt = NULL;
072b91f9
BK		 1976 union ibmvfc_iu rsp_iu;
1977 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1978 int rsp_rc = -EBUSY;
1979 unsigned long flags;
1980 int rsp_code = 0;
1981
1982 spin_lock_irqsave(vhost->host->host_lock, flags);
1983 if (vhost->state == IBMVFC_ACTIVE) {
1984 evt = ibmvfc_get_event(vhost);
1985 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1986
1987 tmf = &evt->iu.cmd;
1988 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1989 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1990 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1991 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1992 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1993 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1994 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1995 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
072b91f9 1996 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 1997 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
072b91f9
BK		 1998 tmf->iu.tmf_flags = type;
1999 evt->sync_iu = &rsp_iu;
2000
2001 init_completion(&evt->comp);
2002 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2003 }
2004 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2005
2006 if (rsp_rc != 0) {
2007 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2008 desc, rsp_rc);
2009 return -EIO;
2010 }
2011
2012 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2013 wait_for_completion(&evt->comp);
2014
230934a6
BK		 2015 if (rsp_iu.cmd.status)
2016 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2017
2018 if (rsp_code) {
072b91f9
BK		 2019 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2020 rsp_code = fc_rsp->data.info.rsp_code;
2021
2022 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
0aab6c3f
TD		 2023 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2024 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
072b91f9
BK		 2025 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2026 fc_rsp->scsi_status);
2027 rsp_rc = -EIO;
2028 } else
2029 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2030
2031 spin_lock_irqsave(vhost->host->host_lock, flags);
2032 ibmvfc_free_event(evt);
2033 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2034 return rsp_rc;
2035}
2036
2037/**
d2fab5cf
BK		 2038 * ibmvfc_match_rport - Match function for specified remote port
2039 * @evt: ibmvfc event struct
2040 * @device: device to match (rport)
072b91f9
BK		 2041 *
2042 * Returns:
d2fab5cf 2043 * 1 if event matches rport / 0 if event does not match rport
072b91f9 2044 **/
d2fab5cf 2045static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
072b91f9 2046{
d2fab5cf 2047 struct fc_rport *cmd_rport;
072b91f9 2048
d2fab5cf
BK		 2049 if (evt->cmnd) {
2050 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2051 if (cmd_rport == rport)
2052 return 1;
072b91f9 2053 }
d2fab5cf
BK		 2054 return 0;
2055}
072b91f9 2056
d2fab5cf
BK		 2057/**
2058 * ibmvfc_match_target - Match function for specified target
2059 * @evt: ibmvfc event struct
2060 * @device: device to match (starget)
2061 *
2062 * Returns:
2063 * 1 if event matches starget / 0 if event does not match starget
2064 **/
2065static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2066{
2067 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2068 return 1;
2069 return 0;
2070}
072b91f9 2071
d2fab5cf
BK		 2072/**
2073 * ibmvfc_match_lun - Match function for specified LUN
2074 * @evt: ibmvfc event struct
2075 * @device: device to match (sdev)
2076 *
2077 * Returns:
2078 * 1 if event matches sdev / 0 if event does not match sdev
2079 **/
2080static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2081{
2082 if (evt->cmnd && evt->cmnd->device == device)
2083 return 1;
2084 return 0;
2085}
072b91f9 2086
d2fab5cf
BK		 2087/**
2088 * ibmvfc_wait_for_ops - Wait for ops to complete
2089 * @vhost: ibmvfc host struct
2090 * @device: device to match (starget or sdev)
2091 * @match: match function
2092 *
2093 * Returns:
2094 * SUCCESS / FAILED
2095 **/
2096static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2097 int (*match) (struct ibmvfc_event *, void *))
2098{
2099 struct ibmvfc_event *evt;
2100 DECLARE_COMPLETION_ONSTACK(comp);
2101 int wait;
2102 unsigned long flags;
2103 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
072b91f9 2104
d2fab5cf
BK		 2105 ENTER;
2106 do {
2107 wait = 0;
2108 spin_lock_irqsave(vhost->host->host_lock, flags);
2109 list_for_each_entry(evt, &vhost->sent, queue) {
2110 if (match(evt, device)) {
2111 evt->eh_comp = &comp;
2112 wait++;
2113 }
2114 }
2115 spin_unlock_irqrestore(vhost->host->host_lock, flags);
230934a6 2116
d2fab5cf
BK		 2117 if (wait) {
2118 timeout = wait_for_completion_timeout(&comp, timeout);
072b91f9 2119
d2fab5cf
BK		 2120 if (!timeout) {
2121 wait = 0;
2122 spin_lock_irqsave(vhost->host->host_lock, flags);
2123 list_for_each_entry(evt, &vhost->sent, queue) {
2124 if (match(evt, device)) {
2125 evt->eh_comp = NULL;
2126 wait++;
2127 }
2128 }
2129 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2130 if (wait)
2131 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2132 LEAVE;
2133 return wait ? FAILED : SUCCESS;
2134 }
2135 }
2136 } while (wait);
072b91f9 2137
d2fab5cf
BK		 2138 LEAVE;
2139 return SUCCESS;
072b91f9
BK		 2140}
2141
2142/**
2143 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2144 * @sdev: scsi device to cancel commands
2145 * @type: type of error recovery being performed
2146 *
2147 * This sends a cancel to the VIOS for the specified device. This does
2148 * NOT send any abort to the actual device. That must be done separately.
2149 *
2150 * Returns:
2151 * 0 on success / other on failure
2152 **/
2153static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2154{
2155 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 2156 struct scsi_target *starget = scsi_target(sdev);
2157 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 2158 struct ibmvfc_tmf *tmf;
2159 struct ibmvfc_event *evt, *found_evt;
2160 union ibmvfc_iu rsp;
2161 int rsp_rc = -EBUSY;
2162 unsigned long flags;
2163 u16 status;
2164
2165 ENTER;
2166 spin_lock_irqsave(vhost->host->host_lock, flags);
2167 found_evt = NULL;
2168 list_for_each_entry(evt, &vhost->sent, queue) {
2169 if (evt->cmnd && evt->cmnd->device == sdev) {
2170 found_evt = evt;
2171 break;
2172 }
2173 }
2174
2175 if (!found_evt) {
2176 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2177 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2178 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2179 return 0;
2180 }
2181
55d29bf0 2182 if (vhost->logged_in) {
072b91f9
BK		 2183 evt = ibmvfc_get_event(vhost);
2184 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2185
2186 tmf = &evt->iu.tmf;
2187 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2188 tmf->common.version = cpu_to_be32(1);
2189 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2190 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2191 tmf->scsi_id = cpu_to_be64(rport->port_id);
072b91f9 2192 int_to_scsilun(sdev->lun, &tmf->lun);
0aab6c3f 2193 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
90f725db 2194 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
55d29bf0 2195 if (vhost->state == IBMVFC_ACTIVE)
0aab6c3f 2196 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
55d29bf0 2197 else
0aab6c3f
TD		 2198 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2199 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2200 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
072b91f9
BK		 2201
2202 evt->sync_iu = &rsp;
2203 init_completion(&evt->comp);
2204 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2205 }
2206
2207 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2208
2209 if (rsp_rc != 0) {
2210 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
c281e32a
BK		 2211 /* If failure is received, the host adapter is most likely going
2212 through reset, return success so the caller will wait for the command
2213 being cancelled to get returned */
2214 return 0;
072b91f9
BK		 2215 }
2216
2217 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2218
2219 wait_for_completion(&evt->comp);
0aab6c3f 2220 status = be16_to_cpu(rsp.mad_common.status);
072b91f9
BK		 2221 spin_lock_irqsave(vhost->host->host_lock, flags);
2222 ibmvfc_free_event(evt);
2223 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2224
2225 if (status != IBMVFC_MAD_SUCCESS) {
2226 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
c281e32a
BK		 2227 switch (status) {
2228 case IBMVFC_MAD_DRIVER_FAILED:
2229 case IBMVFC_MAD_CRQ_ERROR:
2230 /* Host adapter most likely going through reset, return success to
2231 the caller will wait for the command being cancelled to get returned */
2232 return 0;
2233 default:
2234 return -EIO;
2235 };
072b91f9
BK		 2236 }
2237
2238 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2239 return 0;
2240}
2241
ad8dcffa 2242/**
d2fab5cf 2243 * ibmvfc_match_key - Match function for specified cancel key
ad8dcffa 2244 * @evt: ibmvfc event struct
d2fab5cf 2245 * @key: cancel key to match
ad8dcffa
BK		 2246 *
2247 * Returns:
d2fab5cf 2248 * 1 if event matches key / 0 if event does not match key
ad8dcffa 2249 **/
d2fab5cf 2250static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
ad8dcffa 2251{
d2fab5cf 2252 unsigned long cancel_key = (unsigned long)key;
ad8dcffa 2253
d2fab5cf 2254 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
0aab6c3f 2255 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
ad8dcffa
BK		 2256 return 1;
2257 return 0;
2258}
2259
a077c7fa
BK		 2260/**
2261 * ibmvfc_match_evt - Match function for specified event
2262 * @evt: ibmvfc event struct
2263 * @match: event to match
2264 *
2265 * Returns:
2266 * 1 if event matches key / 0 if event does not match key
2267 **/
2268static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2269{
2270 if (evt == match)
2271 return 1;
2272 return 0;
2273}
2274
ad8dcffa 2275/**
d2fab5cf
BK		 2276 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2277 * @sdev: scsi device to abort commands
2278 *
2279 * This sends an Abort Task Set to the VIOS for the specified device. This does
2280 * NOT send any cancel to the VIOS. That must be done separately.
ad8dcffa
BK		 2281 *
2282 * Returns:
d2fab5cf 2283 * 0 on success / other on failure
ad8dcffa 2284 **/
d2fab5cf 2285static int ibmvfc_abort_task_set(struct scsi_device *sdev)
ad8dcffa 2286{
d2fab5cf
BK		 2287 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2288 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2289 struct ibmvfc_cmd *tmf;
2290 struct ibmvfc_event *evt, *found_evt;
2291 union ibmvfc_iu rsp_iu;
2292 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2293 int rc, rsp_rc = -EBUSY;
2294 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2295 int rsp_code = 0;
ad8dcffa 2296
d2fab5cf
BK		 2297 spin_lock_irqsave(vhost->host->host_lock, flags);
2298 found_evt = NULL;
2299 list_for_each_entry(evt, &vhost->sent, queue) {
2300 if (evt->cmnd && evt->cmnd->device == sdev) {
2301 found_evt = evt;
2302 break;
ad8dcffa 2303 }
d2fab5cf
BK		 2304 }
2305
2306 if (!found_evt) {
2307 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2308 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
ad8dcffa 2309 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2fab5cf
BK		 2310 return 0;
2311 }
ad8dcffa 2312
d2fab5cf
BK		 2313 if (vhost->state == IBMVFC_ACTIVE) {
2314 evt = ibmvfc_get_event(vhost);
2315 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
ad8dcffa 2316
d2fab5cf
BK		 2317 tmf = &evt->iu.cmd;
2318 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2319 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2320 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2321 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2322 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2323 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2324 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2325 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
d2fab5cf 2326 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 2327 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
d2fab5cf
BK		 2328 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2329 evt->sync_iu = &rsp_iu;
2330
2331 init_completion(&evt->comp);
2332 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2333 }
2334
2335 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2336
2337 if (rsp_rc != 0) {
2338 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2339 return -EIO;
2340 }
2341
2342 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2343 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2344
2345 if (!timeout) {
f8804b72 2346 rc = ibmvfc_cancel_all(sdev, 0);
d2fab5cf
BK		 2347 if (!rc) {
2348 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2349 if (rc == SUCCESS)
2350 rc = 0;
ad8dcffa 2351 }
ad8dcffa 2352
d2fab5cf
BK		 2353 if (rc) {
2354 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2355 ibmvfc_reset_host(vhost);
a077c7fa
BK		 2356 rsp_rc = -EIO;
2357 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2358
2359 if (rc == SUCCESS)
2360 rsp_rc = 0;
2361
2362 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2363 if (rc != SUCCESS) {
2364 spin_lock_irqsave(vhost->host->host_lock, flags);
2365 ibmvfc_hard_reset_host(vhost);
2366 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2367 rsp_rc = 0;
2368 }
2369
d2fab5cf
BK		 2370 goto out;
2371 }
2372 }
2373
2374 if (rsp_iu.cmd.status)
2375 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2376
2377 if (rsp_code) {
2378 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2379 rsp_code = fc_rsp->data.info.rsp_code;
2380
2381 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2382 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
0aab6c3f 2383 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
d2fab5cf
BK		 2384 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
2385 fc_rsp->scsi_status);
2386 rsp_rc = -EIO;
2387 } else
2388 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2389
2390out:
2391 spin_lock_irqsave(vhost->host->host_lock, flags);
2392 ibmvfc_free_event(evt);
2393 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2394 return rsp_rc;
ad8dcffa
BK		 2395}
2396
072b91f9
BK		 2397/**
2398 * ibmvfc_eh_abort_handler - Abort a command
2399 * @cmd: scsi command to abort
2400 *
2401 * Returns:
93631b4a 2402 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2403 **/
2404static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2405{
ad8dcffa
BK		 2406 struct scsi_device *sdev = cmd->device;
2407 struct ibmvfc_host *vhost = shost_priv(sdev->host);
55d29bf0 2408 int cancel_rc, block_rc;
ad8dcffa 2409 int rc = FAILED;
072b91f9
BK		 2410
2411 ENTER;
93631b4a 2412 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2413 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2414 if (block_rc != FAST_IO_FAIL) {
2415 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
55d29bf0 2416 ibmvfc_abort_task_set(sdev);
93631b4a 2417 } else
90f725db 2418 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2419
55d29bf0 2420 if (!cancel_rc)
ad8dcffa 2421 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2422
93631b4a
BK		 2423 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2424 rc = FAST_IO_FAIL;
2425
072b91f9 2426 LEAVE;
ad8dcffa 2427 return rc;
072b91f9
BK		 2428}
2429
2430/**
2431 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2432 * @cmd: scsi command struct
2433 *
2434 * Returns:
93631b4a 2435 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2436 **/
2437static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2438{
ad8dcffa
BK		 2439 struct scsi_device *sdev = cmd->device;
2440 struct ibmvfc_host *vhost = shost_priv(sdev->host);
93631b4a 2441 int cancel_rc, block_rc, reset_rc = 0;
ad8dcffa 2442 int rc = FAILED;
072b91f9
BK		 2443
2444 ENTER;
93631b4a 2445 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2446 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2447 if (block_rc != FAST_IO_FAIL) {
2448 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2449 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2450 } else
90f725db 2451 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2452
ad8dcffa
BK		 2453 if (!cancel_rc && !reset_rc)
2454 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2455
93631b4a
BK		 2456 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2457 rc = FAST_IO_FAIL;
2458
072b91f9 2459 LEAVE;
ad8dcffa 2460 return rc;
072b91f9
BK		 2461}
2462
93631b4a
BK		 2463/**
2464 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2465 * @sdev: scsi device struct
2466 * @data: return code
2467 *
2468 **/
2469static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2470{
2471 unsigned long *rc = data;
90f725db 2472 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
93631b4a
BK		 2473}
2474
4a5c4a5e
BK		 2475/**
2476 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2477 * @sdev: scsi device struct
2478 * @data: return code
2479 *
2480 **/
2481static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
072b91f9
BK		 2482{
2483 unsigned long *rc = data;
2484 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2485}
2486
072b91f9
BK		 2487/**
2488 * ibmvfc_eh_target_reset_handler - Reset the target
2489 * @cmd: scsi command struct
2490 *
2491 * Returns:
93631b4a 2492 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2493 **/
2494static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2495{
ad8dcffa
BK		 2496 struct scsi_device *sdev = cmd->device;
2497 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2498 struct scsi_target *starget = scsi_target(sdev);
93631b4a
BK		 2499 int block_rc;
2500 int reset_rc = 0;
ad8dcffa 2501 int rc = FAILED;
072b91f9 2502 unsigned long cancel_rc = 0;
072b91f9
BK		 2503
2504 ENTER;
93631b4a 2505 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2506 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2507 if (block_rc != FAST_IO_FAIL) {
2508 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2509 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2510 } else
2511 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
072b91f9 2512
ad8dcffa
BK		 2513 if (!cancel_rc && !reset_rc)
2514 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9 2515
93631b4a
BK		 2516 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2517 rc = FAST_IO_FAIL;
2518
072b91f9 2519 LEAVE;
ad8dcffa 2520 return rc;
072b91f9
BK		 2521}
2522
2523/**
2524 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2525 * @cmd: struct scsi_cmnd having problems
2526 *
2527 **/
2528static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2529{
8d8a3f59 2530 int rc;
072b91f9
BK		 2531 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2532
2533 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2534 rc = ibmvfc_issue_fc_host_lip(vhost->host);
93631b4a 2535
072b91f9
BK		 2536 return rc ? FAILED : SUCCESS;
2537}
2538
2539/**
2540 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2541 * @rport: rport struct
2542 *
2543 * Return value:
2544 * none
2545 **/
2546static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2547{
d2fab5cf 2548 struct Scsi_Host *shost = rport_to_shost(rport);
072b91f9 2549 struct ibmvfc_host *vhost = shost_priv(shost);
d2fab5cf
BK		 2550 struct fc_rport *dev_rport;
2551 struct scsi_device *sdev;
2552 unsigned long rc;
072b91f9
BK		 2553
2554 ENTER;
d2fab5cf
BK		 2555 shost_for_each_device(sdev, shost) {
2556 dev_rport = starget_to_rport(scsi_target(sdev));
2557 if (dev_rport != rport)
2558 continue;
90f725db 2559 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
d2fab5cf 2560 }
072b91f9 2561
d2fab5cf 2562 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
ad8dcffa
BK		 2563
2564 if (rc == FAILED)
072b91f9 2565 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2566 LEAVE;
2567}
2568
d99e5f48 2569static const struct ibmvfc_async_desc ae_desc [] = {
402c6eec
RJ		 2570 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2571 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2572 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2573 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2574 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2575 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2576 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2577 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2578 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2579 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2580 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2581 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2582 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
072b91f9
BK		 2583};
2584
d99e5f48 2585static const struct ibmvfc_async_desc unknown_ae = {
402c6eec 2586 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
d99e5f48 2587};
072b91f9
BK		 2588
2589/**
2590 * ibmvfc_get_ae_desc - Get text description for async event
2591 * @ae: async event
2592 *
2593 **/
d99e5f48 2594static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
072b91f9
BK		 2595{
2596 int i;
2597
2598 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2599 if (ae_desc[i].ae == ae)
d99e5f48
BK		 2600 return &ae_desc[i];
2601
2602 return &unknown_ae;
2603}
2604
2605static const struct {
2606 enum ibmvfc_ae_link_state state;
2607 const char *desc;
2608} link_desc [] = {
2609 { IBMVFC_AE_LS_LINK_UP, " link up" },
2610 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2611 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2612 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2613};
2614
2615/**
2616 * ibmvfc_get_link_state - Get text description for link state
2617 * @state: link state
2618 *
2619 **/
2620static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2621{
2622 int i;
2623
2624 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2625 if (link_desc[i].state == state)
2626 return link_desc[i].desc;
072b91f9 2627
d99e5f48 2628 return "";
072b91f9
BK		 2629}
2630
2631/**
2632 * ibmvfc_handle_async - Handle an async event from the adapter
2633 * @crq: crq to process
2634 * @vhost: ibmvfc host struct
2635 *
2636 **/
2637static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2638 struct ibmvfc_host *vhost)
2639{
0aab6c3f 2640 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
6d29cc56 2641 struct ibmvfc_target *tgt;
072b91f9 2642
d99e5f48 2643 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
21367e20
TD		 2644 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2645 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
d99e5f48 2646 ibmvfc_get_link_state(crq->link_state));
072b91f9 2647
0aab6c3f 2648 switch (be64_to_cpu(crq->event)) {
072b91f9 2649 case IBMVFC_AE_RESUME:
497f9c50
BK		 2650 switch (crq->link_state) {
2651 case IBMVFC_AE_LS_LINK_DOWN:
2652 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2653 break;
2654 case IBMVFC_AE_LS_LINK_DEAD:
2655 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2656 break;
2657 case IBMVFC_AE_LS_LINK_UP:
2658 case IBMVFC_AE_LS_LINK_BOUNCED:
2659 default:
2660 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2661 vhost->delay_init = 1;
2662 __ibmvfc_reset_host(vhost);
2663 break;
f36cfe6a 2664 }
497f9c50
BK		 2665
2666 break;
2667 case IBMVFC_AE_LINK_UP:
072b91f9 2668 vhost->events_to_log |= IBMVFC_AE_LINKUP;
d2131b33
BK		 2669 vhost->delay_init = 1;
2670 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2671 break;
2672 case IBMVFC_AE_SCN_FABRIC:
d2131b33 2673 case IBMVFC_AE_SCN_DOMAIN:
072b91f9 2674 vhost->events_to_log |= IBMVFC_AE_RSCN;
5cdf1626
BK		 2675 if (vhost->state < IBMVFC_HALTED) {
2676 vhost->delay_init = 1;
2677 __ibmvfc_reset_host(vhost);
2678 }
072b91f9
BK		 2679 break;
2680 case IBMVFC_AE_SCN_NPORT:
2681 case IBMVFC_AE_SCN_GROUP:
072b91f9 2682 vhost->events_to_log |= IBMVFC_AE_RSCN;
6d29cc56
BK		 2683 ibmvfc_reinit_host(vhost);
2684 break;
072b91f9
BK		 2685 case IBMVFC_AE_ELS_LOGO:
2686 case IBMVFC_AE_ELS_PRLO:
2687 case IBMVFC_AE_ELS_PLOGI:
6d29cc56
BK		 2688 list_for_each_entry(tgt, &vhost->targets, queue) {
2689 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2690 break;
0aab6c3f 2691 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
6d29cc56 2692 continue;
0aab6c3f 2693 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
6d29cc56 2694 continue;
0aab6c3f 2695 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
6d29cc56 2696 continue;
0aab6c3f 2697 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
017b2ae3 2698 tgt->logo_rcvd = 1;
0aab6c3f 2699 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
017b2ae3
BK		 2700 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2701 ibmvfc_reinit_host(vhost);
2702 }
6d29cc56 2703 }
072b91f9
BK		 2704 break;
2705 case IBMVFC_AE_LINK_DOWN:
2706 case IBMVFC_AE_ADAPTER_FAILED:
2707 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2708 break;
2709 case IBMVFC_AE_LINK_DEAD:
2710 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2711 break;
2712 case IBMVFC_AE_HALT:
2713 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2714 break;
2715 default:
775a42ec 2716 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
072b91f9 2717 break;
f36cfe6a 2718 }
072b91f9
BK		 2719}
2720
2721/**
2722 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2723 * @crq: Command/Response queue
2724 * @vhost: ibmvfc host struct
2725 *
2726 **/
2727static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2728{
2729 long rc;
0aab6c3f 2730 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
072b91f9
BK		 2731
2732 switch (crq->valid) {
2733 case IBMVFC_CRQ_INIT_RSP:
2734 switch (crq->format) {
2735 case IBMVFC_CRQ_INIT:
2736 dev_info(vhost->dev, "Partner initialized\n");
2737 /* Send back a response */
2738 rc = ibmvfc_send_crq_init_complete(vhost);
2739 if (rc == 0)
861890c6 2740 ibmvfc_init_host(vhost);
072b91f9
BK		 2741 else
2742 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2743 break;
2744 case IBMVFC_CRQ_INIT_COMPLETE:
2745 dev_info(vhost->dev, "Partner initialization complete\n");
861890c6 2746 ibmvfc_init_host(vhost);
072b91f9
BK		 2747 break;
2748 default:
2749 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2750 }
2751 return;
2752 case IBMVFC_CRQ_XPORT_EVENT:
2753 vhost->state = IBMVFC_NO_CRQ;
79111d08 2754 vhost->logged_in = 0;
072b91f9
BK		 2755 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2756 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2757 /* We need to re-setup the interpartition connection */
2758 dev_info(vhost->dev, "Re-enabling adapter\n");
2759 vhost->client_migrated = 1;
2760 ibmvfc_purge_requests(vhost, DID_REQUEUE);
73ee5d86
BK		 2761 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2762 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
072b91f9
BK		 2763 } else {
2764 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
072b91f9 2765 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 2766 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2767 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
072b91f9
BK		 2768 }
2769 return;
2770 case IBMVFC_CRQ_CMD_RSP:
2771 break;
2772 default:
2773 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2774 return;
2775 }
2776
2777 if (crq->format == IBMVFC_ASYNC_EVENT)
2778 return;
2779
2780 /* The only kind of payload CRQs we should get are responses to
2781 * things we send. Make sure this response is to something we
2782 * actually sent
2783 */
2784 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
775a42ec 2785 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
072b91f9
BK		 2786 crq->ioba);
2787 return;
2788 }
2789
2790 if (unlikely(atomic_read(&evt->free))) {
775a42ec 2791 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
072b91f9
BK		 2792 crq->ioba);
2793 return;
2794 }
2795
2796 del_timer(&evt->timer);
2797 list_del(&evt->queue);
2798 ibmvfc_trc_end(evt);
2799 evt->done(evt);
2800}
2801
2802/**
2803 * ibmvfc_scan_finished - Check if the device scan is done.
2804 * @shost: scsi host struct
2805 * @time: current elapsed time
2806 *
2807 * Returns:
2808 * 0 if scan is not done / 1 if scan is done
2809 **/
2810static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2811{
2812 unsigned long flags;
2813 struct ibmvfc_host *vhost = shost_priv(shost);
2814 int done = 0;
2815
2816 spin_lock_irqsave(shost->host_lock, flags);
2817 if (time >= (init_timeout * HZ)) {
2818 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2819 "continuing initialization\n", init_timeout);
2820 done = 1;
2821 }
2822
43c8da90 2823 if (vhost->scan_complete)
072b91f9
BK		 2824 done = 1;
2825 spin_unlock_irqrestore(shost->host_lock, flags);
2826 return done;
2827}
2828
2829/**
2830 * ibmvfc_slave_alloc - Setup the device's task set value
2831 * @sdev: struct scsi_device device to configure
2832 *
2833 * Set the device's task set value so that error handling works as
2834 * expected.
2835 *
2836 * Returns:
2837 * 0 on success / -ENXIO if device does not exist
2838 **/
2839static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2840{
2841 struct Scsi_Host *shost = sdev->host;
2842 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2843 struct ibmvfc_host *vhost = shost_priv(shost);
2844 unsigned long flags = 0;
2845
2846 if (!rport || fc_remote_port_chkready(rport))
2847 return -ENXIO;
2848
2849 spin_lock_irqsave(shost->host_lock, flags);
2850 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2851 spin_unlock_irqrestore(shost->host_lock, flags);
2852 return 0;
2853}
2854
ad8dcffa
BK		 2855/**
2856 * ibmvfc_target_alloc - Setup the target's task set value
2857 * @starget: struct scsi_target
2858 *
2859 * Set the target's task set value so that error handling works as
2860 * expected.
2861 *
2862 * Returns:
2863 * 0 on success / -ENXIO if device does not exist
2864 **/
2865static int ibmvfc_target_alloc(struct scsi_target *starget)
2866{
2867 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2868 struct ibmvfc_host *vhost = shost_priv(shost);
2869 unsigned long flags = 0;
2870
2871 spin_lock_irqsave(shost->host_lock, flags);
2872 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2873 spin_unlock_irqrestore(shost->host_lock, flags);
2874 return 0;
2875}
2876
072b91f9
BK		 2877/**
2878 * ibmvfc_slave_configure - Configure the device
2879 * @sdev: struct scsi_device device to configure
2880 *
2881 * Enable allow_restart for a device if it is a disk. Adjust the
2882 * queue_depth here also.
2883 *
2884 * Returns:
2885 * 0
2886 **/
2887static int ibmvfc_slave_configure(struct scsi_device *sdev)
2888{
2889 struct Scsi_Host *shost = sdev->host;
072b91f9
BK		 2890 unsigned long flags = 0;
2891
2892 spin_lock_irqsave(shost->host_lock, flags);
2893 if (sdev->type == TYPE_DISK)
2894 sdev->allow_restart = 1;
072b91f9
BK		 2895 spin_unlock_irqrestore(shost->host_lock, flags);
2896 return 0;
2897}
2898
2899/**
2900 * ibmvfc_change_queue_depth - Change the device's queue depth
2901 * @sdev: scsi device struct
2902 * @qdepth: depth to set
e881a172 2903 * @reason: calling context
072b91f9
BK		 2904 *
2905 * Return value:
2906 * actual depth set
2907 **/
db5ed4df 2908static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
072b91f9
BK		 2909{
2910 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2911 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2912
db5ed4df 2913 return scsi_change_queue_depth(sdev, qdepth);
072b91f9
BK		 2914}
2915
072b91f9
BK		 2916static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2917 struct device_attribute *attr, char *buf)
2918{
2919 struct Scsi_Host *shost = class_to_shost(dev);
2920 struct ibmvfc_host *vhost = shost_priv(shost);
2921
2922 return snprintf(buf, PAGE_SIZE, "%s\n",
2923 vhost->login_buf->resp.partition_name);
2924}
2925
072b91f9
BK		 2926static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2927 struct device_attribute *attr, char *buf)
2928{
2929 struct Scsi_Host *shost = class_to_shost(dev);
2930 struct ibmvfc_host *vhost = shost_priv(shost);
2931
2932 return snprintf(buf, PAGE_SIZE, "%s\n",
2933 vhost->login_buf->resp.device_name);
2934}
2935
072b91f9
BK		 2936static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2937 struct device_attribute *attr, char *buf)
2938{
2939 struct Scsi_Host *shost = class_to_shost(dev);
2940 struct ibmvfc_host *vhost = shost_priv(shost);
2941
2942 return snprintf(buf, PAGE_SIZE, "%s\n",
2943 vhost->login_buf->resp.port_loc_code);
2944}
2945
072b91f9
BK		 2946static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2947 struct device_attribute *attr, char *buf)
2948{
2949 struct Scsi_Host *shost = class_to_shost(dev);
2950 struct ibmvfc_host *vhost = shost_priv(shost);
2951
2952 return snprintf(buf, PAGE_SIZE, "%s\n",
2953 vhost->login_buf->resp.drc_name);
2954}
2955
072b91f9
BK		 2956static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2957 struct device_attribute *attr, char *buf)
2958{
2959 struct Scsi_Host *shost = class_to_shost(dev);
2960 struct ibmvfc_host *vhost = shost_priv(shost);
2961 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2962}
2963
497f9c50
BK		 2964static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2965 struct device_attribute *attr, char *buf)
2966{
2967 struct Scsi_Host *shost = class_to_shost(dev);
2968 struct ibmvfc_host *vhost = shost_priv(shost);
2969 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2970}
2971
072b91f9
BK		 2972/**
2973 * ibmvfc_show_log_level - Show the adapter's error logging level
2974 * @dev: class device struct
2975 * @buf: buffer
2976 *
2977 * Return value:
2978 * number of bytes printed to buffer
2979 **/
2980static ssize_t ibmvfc_show_log_level(struct device *dev,
2981 struct device_attribute *attr, char *buf)
2982{
2983 struct Scsi_Host *shost = class_to_shost(dev);
2984 struct ibmvfc_host *vhost = shost_priv(shost);
2985 unsigned long flags = 0;
2986 int len;
2987
2988 spin_lock_irqsave(shost->host_lock, flags);
2989 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2990 spin_unlock_irqrestore(shost->host_lock, flags);
2991 return len;
2992}
2993
2994/**
2995 * ibmvfc_store_log_level - Change the adapter's error logging level
2996 * @dev: class device struct
2997 * @buf: buffer
2998 *
2999 * Return value:
3000 * number of bytes printed to buffer
3001 **/
3002static ssize_t ibmvfc_store_log_level(struct device *dev,
3003 struct device_attribute *attr,
3004 const char *buf, size_t count)
3005{
3006 struct Scsi_Host *shost = class_to_shost(dev);
3007 struct ibmvfc_host *vhost = shost_priv(shost);
3008 unsigned long flags = 0;
3009
3010 spin_lock_irqsave(shost->host_lock, flags);
3011 vhost->log_level = simple_strtoul(buf, NULL, 10);
3012 spin_unlock_irqrestore(shost->host_lock, flags);
3013 return strlen(buf);
3014}
3015
85e2399e
BK		 3016static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3017static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3018static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3019static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3020static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
497f9c50 3021static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
85e2399e
BK		 3022static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3023 ibmvfc_show_log_level, ibmvfc_store_log_level);
072b91f9
BK		 3024
3025#ifdef CONFIG_SCSI_IBMVFC_TRACE
3026/**
3027 * ibmvfc_read_trace - Dump the adapter trace
2c3c8bea 3028 * @filp: open sysfs file
072b91f9
BK		 3029 * @kobj: kobject struct
3030 * @bin_attr: bin_attribute struct
3031 * @buf: buffer
3032 * @off: offset
3033 * @count: buffer size
3034 *
3035 * Return value:
3036 * number of bytes printed to buffer
3037 **/
2c3c8bea 3038static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
072b91f9
BK		 3039 struct bin_attribute *bin_attr,
3040 char *buf, loff_t off, size_t count)
3041{
3042 struct device *dev = container_of(kobj, struct device, kobj);
3043 struct Scsi_Host *shost = class_to_shost(dev);
3044 struct ibmvfc_host *vhost = shost_priv(shost);
3045 unsigned long flags = 0;
3046 int size = IBMVFC_TRACE_SIZE;
3047 char *src = (char *)vhost->trace;
3048
3049 if (off > size)
3050 return 0;
3051 if (off + count > size) {
3052 size -= off;
3053 count = size;
3054 }
3055
3056 spin_lock_irqsave(shost->host_lock, flags);
3057 memcpy(buf, &src[off], count);
3058 spin_unlock_irqrestore(shost->host_lock, flags);
3059 return count;
3060}
3061
3062static struct bin_attribute ibmvfc_trace_attr = {
3063 .attr = {
3064 .name = "trace",
3065 .mode = S_IRUGO,
3066 },
3067 .size = 0,
3068 .read = ibmvfc_read_trace,
3069};
3070#endif
3071
3072static struct device_attribute *ibmvfc_attrs[] = {
85e2399e
BK		 3073 &dev_attr_partition_name,
3074 &dev_attr_device_name,
3075 &dev_attr_port_loc_code,
3076 &dev_attr_drc_name,
3077 &dev_attr_npiv_version,
497f9c50 3078 &dev_attr_capabilities,
85e2399e 3079 &dev_attr_log_level,
072b91f9
BK		 3080 NULL
3081};
3082
3083static struct scsi_host_template driver_template = {
3084 .module = THIS_MODULE,
3085 .name = "IBM POWER Virtual FC Adapter",
3086 .proc_name = IBMVFC_NAME,
3087 .queuecommand = ibmvfc_queuecommand,
b6a05c82 3088 .eh_timed_out = fc_eh_timed_out,
072b91f9
BK		 3089 .eh_abort_handler = ibmvfc_eh_abort_handler,
3090 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3091 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3092 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3093 .slave_alloc = ibmvfc_slave_alloc,
3094 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 3095 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 3096 .scan_finished = ibmvfc_scan_finished,
3097 .change_queue_depth = ibmvfc_change_queue_depth,
072b91f9
BK		 3098 .cmd_per_lun = 16,
3099 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3100 .this_id = -1,
3101 .sg_tablesize = SG_ALL,
3102 .max_sectors = IBMVFC_MAX_SECTORS,
072b91f9 3103 .shost_attrs = ibmvfc_attrs,
c40ecc12 3104 .track_queue_depth = 1,
072b91f9
BK		 3105};
3106
3107/**
3108 * ibmvfc_next_async_crq - Returns the next entry in async queue
3109 * @vhost: ibmvfc host struct
3110 *
3111 * Returns:
3112 * Pointer to next entry in queue / NULL if empty
3113 **/
3114static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3115{
3116 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3117 struct ibmvfc_async_crq *crq;
3118
3119 crq = &async_crq->msgs[async_crq->cur];
3120 if (crq->valid & 0x80) {
3121 if (++async_crq->cur == async_crq->size)
3122 async_crq->cur = 0;
f5832fa2 3123 rmb();
072b91f9
BK		 3124 } else
3125 crq = NULL;
3126
3127 return crq;
3128}
3129
3130/**
3131 * ibmvfc_next_crq - Returns the next entry in message queue
3132 * @vhost: ibmvfc host struct
3133 *
3134 * Returns:
3135 * Pointer to next entry in queue / NULL if empty
3136 **/
3137static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3138{
3139 struct ibmvfc_crq_queue *queue = &vhost->crq;
3140 struct ibmvfc_crq *crq;
3141
3142 crq = &queue->msgs[queue->cur];
3143 if (crq->valid & 0x80) {
3144 if (++queue->cur == queue->size)
3145 queue->cur = 0;
f5832fa2 3146 rmb();
072b91f9
BK		 3147 } else
3148 crq = NULL;
3149
3150 return crq;
3151}
3152
3153/**
3154 * ibmvfc_interrupt - Interrupt handler
3155 * @irq: number of irq to handle, not used
3156 * @dev_instance: ibmvfc_host that received interrupt
3157 *
3158 * Returns:
3159 * IRQ_HANDLED
3160 **/
3161static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3162{
3163 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
039a0898
BK		 3164 unsigned long flags;
3165
3166 spin_lock_irqsave(vhost->host->host_lock, flags);
3167 vio_disable_interrupts(to_vio_dev(vhost->dev));
3168 tasklet_schedule(&vhost->tasklet);
3169 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3170 return IRQ_HANDLED;
3171}
3172
3173/**
3174 * ibmvfc_tasklet - Interrupt handler tasklet
3175 * @data: ibmvfc host struct
3176 *
3177 * Returns:
3178 * Nothing
3179 **/
3180static void ibmvfc_tasklet(void *data)
3181{
3182 struct ibmvfc_host *vhost = data;
072b91f9
BK		 3183 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3184 struct ibmvfc_crq *crq;
3185 struct ibmvfc_async_crq *async;
3186 unsigned long flags;
3187 int done = 0;
3188
3189 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 3190 while (!done) {
072b91f9
BK		 3191 /* Pull all the valid messages off the async CRQ */
3192 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3193 ibmvfc_handle_async(async, vhost);
3194 async->valid = 0;
f5832fa2 3195 wmb();
072b91f9
BK		 3196 }
3197
f1d7fb7a
BK		 3198 /* Pull all the valid messages off the CRQ */
3199 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
072b91f9
BK		 3200 ibmvfc_handle_crq(crq, vhost);
3201 crq->valid = 0;
f5832fa2 3202 wmb();
f1d7fb7a
BK		 3203 }
3204
3205 vio_enable_interrupts(vdev);
3206 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
072b91f9
BK		 3207 vio_disable_interrupts(vdev);
3208 ibmvfc_handle_async(async, vhost);
4081b77c 3209 async->valid = 0;
f5832fa2 3210 wmb();
f1d7fb7a
BK		 3211 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3212 vio_disable_interrupts(vdev);
3213 ibmvfc_handle_crq(crq, vhost);
3214 crq->valid = 0;
f5832fa2 3215 wmb();
072b91f9
BK		 3216 } else
3217 done = 1;
3218 }
3219
3220 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 3221}
3222
3223/**
3224 * ibmvfc_init_tgt - Set the next init job step for the target
3225 * @tgt: ibmvfc target struct
3226 * @job_step: job step to perform
3227 *
3228 **/
3229static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3230 void (*job_step) (struct ibmvfc_target *))
3231{
3232 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3233 tgt->job_step = job_step;
3234 wake_up(&tgt->vhost->work_wait_q);
3235}
3236
3237/**
3238 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3239 * @tgt: ibmvfc target struct
3240 * @job_step: initialization job step
3241 *
7d0e4622
BK		 3242 * Returns: 1 if step will be retried / 0 if not
3243 *
072b91f9 3244 **/
7d0e4622 3245static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
072b91f9
BK		 3246 void (*job_step) (struct ibmvfc_target *))
3247{
1c41fa82 3248 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
072b91f9
BK		 3249 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3250 wake_up(&tgt->vhost->work_wait_q);
7d0e4622 3251 return 0;
072b91f9
BK		 3252 } else
3253 ibmvfc_init_tgt(tgt, job_step);
7d0e4622 3254 return 1;
072b91f9
BK		 3255}
3256
a3b7aeab
BK		 3257/* Defined in FC-LS */
3258static const struct {
3259 int code;
3260 int retry;
3261 int logged_in;
3262} prli_rsp [] = {
3263 { 0, 1, 0 },
3264 { 1, 0, 1 },
3265 { 2, 1, 0 },
3266 { 3, 1, 0 },
3267 { 4, 0, 0 },
3268 { 5, 0, 0 },
3269 { 6, 0, 1 },
3270 { 7, 0, 0 },
3271 { 8, 1, 0 },
3272};
3273
3274/**
3275 * ibmvfc_get_prli_rsp - Find PRLI response index
3276 * @flags: PRLI response flags
3277 *
3278 **/
3279static int ibmvfc_get_prli_rsp(u16 flags)
3280{
3281 int i;
3282 int code = (flags & 0x0f00) >> 8;
3283
3284 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3285 if (prli_rsp[i].code == code)
3286 return i;
3287
3288 return 0;
3289}
3290
072b91f9
BK		 3291/**
3292 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3293 * @evt: ibmvfc event struct
3294 *
3295 **/
3296static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3297{
3298 struct ibmvfc_target *tgt = evt->tgt;
3299 struct ibmvfc_host *vhost = evt->vhost;
3300 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
a3b7aeab 3301 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
0aab6c3f 3302 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3303 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3304
3305 vhost->discovery_threads--;
3306 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3307 switch (status) {
3308 case IBMVFC_MAD_SUCCESS:
a3b7aeab
BK		 3309 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3310 parms->type, parms->flags, parms->service_parms);
3311
3312 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
0aab6c3f 3313 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
a3b7aeab 3314 if (prli_rsp[index].logged_in) {
0aab6c3f 3315 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
a3b7aeab
BK		 3316 tgt->need_login = 0;
3317 tgt->ids.roles = 0;
0aab6c3f 3318 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
a3b7aeab 3319 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
0aab6c3f 3320 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
a3b7aeab 3321 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
43c8da90 3322 tgt->add_rport = 1;
a3b7aeab
BK		 3323 } else
3324 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3325 } else if (prli_rsp[index].retry)
3326 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3327 else
3328 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3329 } else
3330 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 3331 break;
3332 case IBMVFC_MAD_DRIVER_FAILED:
3333 break;
3334 case IBMVFC_MAD_CRQ_ERROR:
3335 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3336 break;
3337 case IBMVFC_MAD_FAILED:
3338 default:
0aab6c3f
TD		 3339 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3340 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
017b2ae3
BK		 3341 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3342 else if (tgt->logo_rcvd)
3343 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
0aab6c3f 3344 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3345 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499
BK		 3346 else
3347 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3348
3349 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
0aab6c3f 3350 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
7d0e4622 3351 rsp->status, rsp->error, status);
072b91f9 3352 break;
f36cfe6a 3353 }
072b91f9
BK		 3354
3355 kref_put(&tgt->kref, ibmvfc_release_tgt);
3356 ibmvfc_free_event(evt);
3357 wake_up(&vhost->work_wait_q);
3358}
3359
3360/**
3361 * ibmvfc_tgt_send_prli - Send a process login
3362 * @tgt: ibmvfc target struct
3363 *
3364 **/
3365static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3366{
3367 struct ibmvfc_process_login *prli;
3368 struct ibmvfc_host *vhost = tgt->vhost;
3369 struct ibmvfc_event *evt;
3370
3371 if (vhost->discovery_threads >= disc_threads)
3372 return;
3373
3374 kref_get(&tgt->kref);
3375 evt = ibmvfc_get_event(vhost);
3376 vhost->discovery_threads++;
3377 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3378 evt->tgt = tgt;
3379 prli = &evt->iu.prli;
3380 memset(prli, 0, sizeof(*prli));
0aab6c3f
TD		 3381 prli->common.version = cpu_to_be32(1);
3382 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3383 prli->common.length = cpu_to_be16(sizeof(*prli));
3384 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3385
3386 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
0aab6c3f
TD		 3387 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3388 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
bb5a5054 3389 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
072b91f9 3390
a6104b1e
TD		 3391 if (cls3_error)
3392 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3393
072b91f9
BK		 3394 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3395 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3396 vhost->discovery_threads--;
3397 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3398 kref_put(&tgt->kref, ibmvfc_release_tgt);
3399 } else
3400 tgt_dbg(tgt, "Sent process login\n");
3401}
3402
3403/**
3404 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3405 * @evt: ibmvfc event struct
3406 *
3407 **/
3408static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3409{
3410 struct ibmvfc_target *tgt = evt->tgt;
3411 struct ibmvfc_host *vhost = evt->vhost;
3412 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
0aab6c3f 3413 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3414 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3415
3416 vhost->discovery_threads--;
3417 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3418 switch (status) {
3419 case IBMVFC_MAD_SUCCESS:
3420 tgt_dbg(tgt, "Port Login succeeded\n");
3421 if (tgt->ids.port_name &&
3422 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3423 vhost->reinit = 1;
3424 tgt_dbg(tgt, "Port re-init required\n");
3425 break;
3426 }
3427 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3428 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3429 tgt->ids.port_id = tgt->scsi_id;
072b91f9
BK		 3430 memcpy(&tgt->service_parms, &rsp->service_parms,
3431 sizeof(tgt->service_parms));
3432 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3433 sizeof(tgt->service_parms_change));
3434 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3435 break;
3436 case IBMVFC_MAD_DRIVER_FAILED:
3437 break;
3438 case IBMVFC_MAD_CRQ_ERROR:
3439 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3440 break;
3441 case IBMVFC_MAD_FAILED:
3442 default:
0aab6c3f 3443 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3444 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499
BK		 3445 else
3446 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3447
3448 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f
TD		 3449 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error,
3450 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type,
3451 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status);
072b91f9 3452 break;
f36cfe6a 3453 }
072b91f9
BK		 3454
3455 kref_put(&tgt->kref, ibmvfc_release_tgt);
3456 ibmvfc_free_event(evt);
3457 wake_up(&vhost->work_wait_q);
3458}
3459
3460/**
3461 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3462 * @tgt: ibmvfc target struct
3463 *
3464 **/
3465static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3466{
3467 struct ibmvfc_port_login *plogi;
3468 struct ibmvfc_host *vhost = tgt->vhost;
3469 struct ibmvfc_event *evt;
3470
3471 if (vhost->discovery_threads >= disc_threads)
3472 return;
3473
3474 kref_get(&tgt->kref);
017b2ae3 3475 tgt->logo_rcvd = 0;
072b91f9
BK		 3476 evt = ibmvfc_get_event(vhost);
3477 vhost->discovery_threads++;
3478 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3479 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3480 evt->tgt = tgt;
3481 plogi = &evt->iu.plogi;
3482 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 3483 plogi->common.version = cpu_to_be32(1);
3484 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3485 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3486 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3487
3488 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3489 vhost->discovery_threads--;
3490 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3491 kref_put(&tgt->kref, ibmvfc_release_tgt);
3492 } else
3493 tgt_dbg(tgt, "Sent port login\n");
3494}
3495
3496/**
3497 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3498 * @evt: ibmvfc event struct
3499 *
3500 **/
3501static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3502{
3503 struct ibmvfc_target *tgt = evt->tgt;
3504 struct ibmvfc_host *vhost = evt->vhost;
3505 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
0aab6c3f 3506 u32 status = be16_to_cpu(rsp->common.status);
072b91f9
BK		 3507
3508 vhost->discovery_threads--;
3509 ibmvfc_free_event(evt);
3510 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3511
3512 switch (status) {
3513 case IBMVFC_MAD_SUCCESS:
3514 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3515 break;
3516 case IBMVFC_MAD_DRIVER_FAILED:
3517 kref_put(&tgt->kref, ibmvfc_release_tgt);
3518 wake_up(&vhost->work_wait_q);
3519 return;
3520 case IBMVFC_MAD_FAILED:
3521 default:
3522 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3523 break;
f36cfe6a 3524 }
072b91f9
BK		 3525
3526 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3527 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3528 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3529 tgt->scsi_id != tgt->new_scsi_id)
3530 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3531 kref_put(&tgt->kref, ibmvfc_release_tgt);
3532 wake_up(&vhost->work_wait_q);
3533}
3534
3535/**
3536 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3537 * @tgt: ibmvfc target struct
3538 *
3539 **/
3540static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3541{
3542 struct ibmvfc_implicit_logout *mad;
3543 struct ibmvfc_host *vhost = tgt->vhost;
3544 struct ibmvfc_event *evt;
3545
3546 if (vhost->discovery_threads >= disc_threads)
3547 return;
3548
3549 kref_get(&tgt->kref);
3550 evt = ibmvfc_get_event(vhost);
3551 vhost->discovery_threads++;
3552 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3553 evt->tgt = tgt;
3554 mad = &evt->iu.implicit_logout;
3555 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3556 mad->common.version = cpu_to_be32(1);
3557 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3558 mad->common.length = cpu_to_be16(sizeof(*mad));
3559 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3560
3561 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3562 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3563 vhost->discovery_threads--;
3564 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3565 kref_put(&tgt->kref, ibmvfc_release_tgt);
3566 } else
3567 tgt_dbg(tgt, "Sent Implicit Logout\n");
3568}
3569
989b8545
BK		 3570/**
3571 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3572 * @mad: ibmvfc passthru mad struct
3573 * @tgt: ibmvfc target struct
3574 *
3575 * Returns:
3576 * 1 if PLOGI needed / 0 if PLOGI not needed
3577 **/
3578static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3579 struct ibmvfc_target *tgt)
3580{
09dd15e0 3581 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
989b8545 3582 return 1;
09dd15e0 3583 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
989b8545 3584 return 1;
0aab6c3f 3585 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
989b8545
BK		 3586 return 1;
3587 return 0;
3588}
3589
3590/**
3591 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3592 * @evt: ibmvfc event struct
3593 *
3594 **/
3595static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3596{
3597 struct ibmvfc_target *tgt = evt->tgt;
3598 struct ibmvfc_host *vhost = evt->vhost;
3599 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
0aab6c3f 3600 u32 status = be16_to_cpu(mad->common.status);
989b8545
BK		 3601 u8 fc_reason, fc_explain;
3602
3603 vhost->discovery_threads--;
3604 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
10501e1c 3605 del_timer(&tgt->timer);
989b8545
BK		 3606
3607 switch (status) {
3608 case IBMVFC_MAD_SUCCESS:
3609 tgt_dbg(tgt, "ADISC succeeded\n");
3610 if (ibmvfc_adisc_needs_plogi(mad, tgt))
5e47167b 3611 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3612 break;
3613 case IBMVFC_MAD_DRIVER_FAILED:
3614 break;
3615 case IBMVFC_MAD_FAILED:
3616 default:
5e47167b 3617 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
0aab6c3f
TD		 3618 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3619 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
989b8545 3620 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f 3621 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
989b8545
BK		 3622 mad->iu.status, mad->iu.error,
3623 ibmvfc_get_fc_type(fc_reason), fc_reason,
3624 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3625 break;
f36cfe6a 3626 }
989b8545
BK		 3627
3628 kref_put(&tgt->kref, ibmvfc_release_tgt);
3629 ibmvfc_free_event(evt);
3630 wake_up(&vhost->work_wait_q);
3631}
3632
3633/**
3634 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3635 * @evt: ibmvfc event struct
3636 *
3637 **/
3638static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3639{
3640 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3641
3642 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3643 mad->common.version = cpu_to_be32(1);
3644 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3645 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3646 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3647 offsetof(struct ibmvfc_passthru_mad, iu));
3648 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3649 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3650 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3651 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3652 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3653 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3654 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3655 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3656 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3657 offsetof(struct ibmvfc_passthru_fc_iu, response));
3658 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
989b8545
BK		 3659}
3660
10501e1c
BK		 3661/**
3662 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3663 * @evt: ibmvfc event struct
3664 *
3665 * Just cleanup this event struct. Everything else is handled by
3666 * the ADISC completion handler. If the ADISC never actually comes
3667 * back, we still have the timer running on the ADISC event struct
3668 * which will fire and cause the CRQ to get reset.
3669 *
3670 **/
3671static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3672{
3673 struct ibmvfc_host *vhost = evt->vhost;
3674 struct ibmvfc_target *tgt = evt->tgt;
3675
3676 tgt_dbg(tgt, "ADISC cancel complete\n");
3677 vhost->abort_threads--;
3678 ibmvfc_free_event(evt);
3679 kref_put(&tgt->kref, ibmvfc_release_tgt);
3680 wake_up(&vhost->work_wait_q);
3681}
3682
3683/**
3684 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3685 * @tgt: ibmvfc target struct
3686 *
3687 * If an ADISC times out, send a cancel. If the cancel times
3688 * out, reset the CRQ. When the ADISC comes back as cancelled,
3689 * log back into the target.
3690 **/
9a5d04fc 3691static void ibmvfc_adisc_timeout(struct timer_list *t)
10501e1c 3692{
9a5d04fc 3693 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
10501e1c
BK		 3694 struct ibmvfc_host *vhost = tgt->vhost;
3695 struct ibmvfc_event *evt;
3696 struct ibmvfc_tmf *tmf;
3697 unsigned long flags;
3698 int rc;
3699
3700 tgt_dbg(tgt, "ADISC timeout\n");
3701 spin_lock_irqsave(vhost->host->host_lock, flags);
3702 if (vhost->abort_threads >= disc_threads ||
3703 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3704 vhost->state != IBMVFC_INITIALIZING ||
3705 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3706 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3707 return;
3708 }
3709
3710 vhost->abort_threads++;
3711 kref_get(&tgt->kref);
3712 evt = ibmvfc_get_event(vhost);
3713 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3714
3715 evt->tgt = tgt;
3716 tmf = &evt->iu.tmf;
3717 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 3718 tmf->common.version = cpu_to_be32(1);
3719 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3720 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3721 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3722 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
10501e1c
BK		 3723
3724 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3725
3726 if (rc) {
3727 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3728 vhost->abort_threads--;
3729 kref_put(&tgt->kref, ibmvfc_release_tgt);
3730 __ibmvfc_reset_host(vhost);
3731 } else
3732 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3733 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3734}
3735
989b8545
BK		 3736/**
3737 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3738 * @tgt: ibmvfc target struct
3739 *
10501e1c
BK		 3740 * When sending an ADISC we end up with two timers running. The
3741 * first timer is the timer in the ibmvfc target struct. If this
3742 * fires, we send a cancel to the target. The second timer is the
3743 * timer on the ibmvfc event for the ADISC, which is longer. If that
3744 * fires, it means the ADISC timed out and our attempt to cancel it
3745 * also failed, so we need to reset the CRQ.
989b8545
BK		 3746 **/
3747static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3748{
3749 struct ibmvfc_passthru_mad *mad;
3750 struct ibmvfc_host *vhost = tgt->vhost;
3751 struct ibmvfc_event *evt;
3752
3753 if (vhost->discovery_threads >= disc_threads)
3754 return;
3755
3756 kref_get(&tgt->kref);
3757 evt = ibmvfc_get_event(vhost);
3758 vhost->discovery_threads++;
3759 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3760 evt->tgt = tgt;
3761
3762 ibmvfc_init_passthru(evt);
3763 mad = &evt->iu.passthru;
0aab6c3f
TD		 3764 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3765 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3766 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
989b8545 3767
0aab6c3f 3768 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
989b8545
BK		 3769 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3770 sizeof(vhost->login_buf->resp.port_name));
3771 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3772 sizeof(vhost->login_buf->resp.node_name));
0aab6c3f 3773 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
989b8545 3774
10501e1c
BK		 3775 if (timer_pending(&tgt->timer))
3776 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3777 else {
10501e1c 3778 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
10501e1c
BK		 3779 add_timer(&tgt->timer);
3780 }
3781
989b8545 3782 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
10501e1c 3783 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
989b8545 3784 vhost->discovery_threads--;
10501e1c 3785 del_timer(&tgt->timer);
989b8545
BK		 3786 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3787 kref_put(&tgt->kref, ibmvfc_release_tgt);
3788 } else
3789 tgt_dbg(tgt, "Sent ADISC\n");
3790}
3791
072b91f9
BK		 3792/**
3793 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3794 * @evt: ibmvfc event struct
3795 *
3796 **/
3797static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3798{
3799 struct ibmvfc_target *tgt = evt->tgt;
3800 struct ibmvfc_host *vhost = evt->vhost;
3801 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
0aab6c3f 3802 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3803 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3804
3805 vhost->discovery_threads--;
3806 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3807 switch (status) {
3808 case IBMVFC_MAD_SUCCESS:
3809 tgt_dbg(tgt, "Query Target succeeded\n");
0aab6c3f
TD		 3810 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3811 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
072b91f9 3812 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3813 else
3814 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3815 break;
3816 case IBMVFC_MAD_DRIVER_FAILED:
3817 break;
3818 case IBMVFC_MAD_CRQ_ERROR:
3819 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3820 break;
3821 case IBMVFC_MAD_FAILED:
3822 default:
0aab6c3f
TD		 3823 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3824 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3825 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
072b91f9 3826 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
0aab6c3f 3827 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3828 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499
BK		 3829 else
3830 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3831
3832 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f
TD		 3833 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3834 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)),
3835 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)),
3836 rsp->fc_explain, status);
072b91f9 3837 break;
f36cfe6a 3838 }
072b91f9
BK		 3839
3840 kref_put(&tgt->kref, ibmvfc_release_tgt);
3841 ibmvfc_free_event(evt);
3842 wake_up(&vhost->work_wait_q);
3843}
3844
3845/**
3846 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3847 * @tgt: ibmvfc target struct
3848 *
3849 **/
3850static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3851{
3852 struct ibmvfc_query_tgt *query_tgt;
3853 struct ibmvfc_host *vhost = tgt->vhost;
3854 struct ibmvfc_event *evt;
3855
3856 if (vhost->discovery_threads >= disc_threads)
3857 return;
3858
3859 kref_get(&tgt->kref);
3860 evt = ibmvfc_get_event(vhost);
3861 vhost->discovery_threads++;
3862 evt->tgt = tgt;
3863 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3864 query_tgt = &evt->iu.query_tgt;
3865 memset(query_tgt, 0, sizeof(*query_tgt));
0aab6c3f
TD		 3866 query_tgt->common.version = cpu_to_be32(1);
3867 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3868 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3869 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
072b91f9
BK		 3870
3871 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3872 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3873 vhost->discovery_threads--;
3874 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3875 kref_put(&tgt->kref, ibmvfc_release_tgt);
3876 } else
3877 tgt_dbg(tgt, "Sent Query Target\n");
3878}
3879
3880/**
3881 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3882 * @vhost: ibmvfc host struct
3883 * @scsi_id: SCSI ID to allocate target for
3884 *
3885 * Returns:
3886 * 0 on success / other on failure
3887 **/
3888static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3889{
3890 struct ibmvfc_target *tgt;
3891 unsigned long flags;
3892
3893 spin_lock_irqsave(vhost->host->host_lock, flags);
3894 list_for_each_entry(tgt, &vhost->targets, queue) {
3895 if (tgt->scsi_id == scsi_id) {
3896 if (tgt->need_login)
3897 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3898 goto unlock_out;
3899 }
3900 }
3901 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3902
7270b9bd 3903 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
0883e3b3 3904 memset(tgt, 0, sizeof(*tgt));
072b91f9
BK		 3905 tgt->scsi_id = scsi_id;
3906 tgt->new_scsi_id = scsi_id;
3907 tgt->vhost = vhost;
3908 tgt->need_login = 1;
10501e1c 3909 tgt->cancel_key = vhost->task_set++;
9a5d04fc 3910 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
072b91f9
BK		 3911 kref_init(&tgt->kref);
3912 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3913 spin_lock_irqsave(vhost->host->host_lock, flags);
3914 list_add_tail(&tgt->queue, &vhost->targets);
3915
3916unlock_out:
3917 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3918 return 0;
3919}
3920
3921/**
3922 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3923 * @vhost: ibmvfc host struct
3924 *
3925 * Returns:
3926 * 0 on success / other on failure
3927 **/
3928static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3929{
3930 int i, rc;
3931
3932 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3933 rc = ibmvfc_alloc_target(vhost,
0aab6c3f
TD		 3934 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3935 IBMVFC_DISC_TGT_SCSI_ID_MASK);
072b91f9
BK		 3936
3937 return rc;
3938}
3939
3940/**
3941 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3942 * @evt: ibmvfc event struct
3943 *
3944 **/
3945static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3946{
3947 struct ibmvfc_host *vhost = evt->vhost;
3948 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
0aab6c3f 3949 u32 mad_status = be16_to_cpu(rsp->common.status);
7d0e4622 3950 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3951
3952 switch (mad_status) {
3953 case IBMVFC_MAD_SUCCESS:
3954 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
0aab6c3f 3955 vhost->num_targets = be32_to_cpu(rsp->num_written);
072b91f9
BK		 3956 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3957 break;
3958 case IBMVFC_MAD_FAILED:
7d0e4622
BK		 3959 level += ibmvfc_retry_host_init(vhost);
3960 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
0aab6c3f
TD		 3961 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3962 rsp->status, rsp->error);
072b91f9
BK		 3963 break;
3964 case IBMVFC_MAD_DRIVER_FAILED:
3965 break;
3966 default:
3967 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3968 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3969 break;
3970 }
3971
3972 ibmvfc_free_event(evt);
3973 wake_up(&vhost->work_wait_q);
3974}
3975
3976/**
3977 * ibmvfc_discover_targets - Send Discover Targets MAD
3978 * @vhost: ibmvfc host struct
3979 *
3980 **/
3981static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3982{
3983 struct ibmvfc_discover_targets *mad;
3984 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3985
3986 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3987 mad = &evt->iu.discover_targets;
3988 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3989 mad->common.version = cpu_to_be32(1);
3990 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
3991 mad->common.length = cpu_to_be16(sizeof(*mad));
3992 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
3993 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
3994 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
072b91f9
BK		 3995 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3996
3997 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3998 ibmvfc_dbg(vhost, "Sent discover targets\n");
3999 else
4000 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4001}
4002
4003/**
4004 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
4005 * @evt: ibmvfc event struct
4006 *
4007 **/
4008static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4009{
4010 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4011 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
072b91f9
BK		 4012 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4013 unsigned int npiv_max_sectors;
7d0e4622 4014 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 4015
4016 switch (mad_status) {
4017 case IBMVFC_MAD_SUCCESS:
4018 ibmvfc_free_event(evt);
4019 break;
4020 case IBMVFC_MAD_FAILED:
0aab6c3f 4021 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 4022 level += ibmvfc_retry_host_init(vhost);
072b91f9
BK		 4023 else
4024 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
7d0e4622 4025 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
0aab6c3f
TD		 4026 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4027 rsp->status, rsp->error);
072b91f9
BK		 4028 ibmvfc_free_event(evt);
4029 return;
4030 case IBMVFC_MAD_CRQ_ERROR:
4031 ibmvfc_retry_host_init(vhost);
4032 case IBMVFC_MAD_DRIVER_FAILED:
4033 ibmvfc_free_event(evt);
4034 return;
4035 default:
4036 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4037 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4038 ibmvfc_free_event(evt);
4039 return;
4040 }
4041
4042 vhost->client_migrated = 0;
4043
0aab6c3f 4044 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
072b91f9
BK		 4045 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4046 rsp->flags);
4047 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4048 wake_up(&vhost->work_wait_q);
4049 return;
4050 }
4051
0aab6c3f 4052 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
072b91f9
BK		 4053 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4054 rsp->max_cmds);
4055 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4056 wake_up(&vhost->work_wait_q);
4057 return;
4058 }
4059
79111d08 4060 vhost->logged_in = 1;
0aab6c3f 4061 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
072b91f9
BK		 4062 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4063 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4064 rsp->drc_name, npiv_max_sectors);
4065
0aab6c3f
TD		 4066 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4067 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4068 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4069 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
072b91f9
BK		 4070 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4071 fc_host_supported_classes(vhost->host) = 0;
0aab6c3f 4072 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4073 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
0aab6c3f 4074 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4075 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
0aab6c3f 4076 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
072b91f9
BK		 4077 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4078 fc_host_maxframe_size(vhost->host) =
0aab6c3f 4079 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4080
0aab6c3f 4081 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
072b91f9
BK		 4082 vhost->host->max_sectors = npiv_max_sectors;
4083 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4084 wake_up(&vhost->work_wait_q);
4085}
4086
4087/**
4088 * ibmvfc_npiv_login - Sends NPIV login
4089 * @vhost: ibmvfc host struct
4090 *
4091 **/
4092static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4093{
4094 struct ibmvfc_npiv_login_mad *mad;
4095 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4096
4097 ibmvfc_gather_partition_info(vhost);
4098 ibmvfc_set_login_info(vhost);
4099 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4100
4101 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4102 mad = &evt->iu.npiv_login;
4103 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
0aab6c3f
TD		 4104 mad->common.version = cpu_to_be32(1);
4105 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4106 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4107 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4108 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
072b91f9 4109
072b91f9
BK		 4110 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4111
4112 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4113 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4114 else
4115 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4116};
4117
79111d08
BK		 4118/**
4119 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4120 * @vhost: ibmvfc host struct
4121 *
4122 **/
4123static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4124{
4125 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4126 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
79111d08
BK		 4127
4128 ibmvfc_free_event(evt);
4129
4130 switch (mad_status) {
4131 case IBMVFC_MAD_SUCCESS:
4132 if (list_empty(&vhost->sent) &&
4133 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
861890c6 4134 ibmvfc_init_host(vhost);
79111d08
BK		 4135 return;
4136 }
4137 break;
4138 case IBMVFC_MAD_FAILED:
4139 case IBMVFC_MAD_NOT_SUPPORTED:
4140 case IBMVFC_MAD_CRQ_ERROR:
4141 case IBMVFC_MAD_DRIVER_FAILED:
4142 default:
4143 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4144 break;
4145 }
4146
4147 ibmvfc_hard_reset_host(vhost);
4148}
4149
4150/**
4151 * ibmvfc_npiv_logout - Issue an NPIV Logout
4152 * @vhost: ibmvfc host struct
4153 *
4154 **/
4155static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4156{
4157 struct ibmvfc_npiv_logout_mad *mad;
4158 struct ibmvfc_event *evt;
4159
4160 evt = ibmvfc_get_event(vhost);
4161 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4162
4163 mad = &evt->iu.npiv_logout;
4164 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 4165 mad->common.version = cpu_to_be32(1);
4166 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4167 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
79111d08
BK		 4168
4169 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4170
4171 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4172 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4173 else
4174 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4175}
4176
072b91f9
BK		 4177/**
4178 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4179 * @vhost: ibmvfc host struct
4180 *
4181 * Returns:
4182 * 1 if work to do / 0 if not
4183 **/
4184static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4185{
4186 struct ibmvfc_target *tgt;
4187
4188 list_for_each_entry(tgt, &vhost->targets, queue) {
4189 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4190 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4191 return 1;
4192 }
4193
4194 return 0;
4195}
4196
4197/**
4198 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4199 * @vhost: ibmvfc host struct
4200 *
4201 * Returns:
4202 * 1 if work to do / 0 if not
4203 **/
4204static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4205{
4206 struct ibmvfc_target *tgt;
4207
4208 if (kthread_should_stop())
4209 return 1;
4210 switch (vhost->action) {
4211 case IBMVFC_HOST_ACTION_NONE:
4212 case IBMVFC_HOST_ACTION_INIT_WAIT:
79111d08 4213 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4214 return 0;
4215 case IBMVFC_HOST_ACTION_TGT_INIT:
4216 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4217 if (vhost->discovery_threads == disc_threads)
4218 return 0;
4219 list_for_each_entry(tgt, &vhost->targets, queue)
4220 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4221 return 1;
4222 list_for_each_entry(tgt, &vhost->targets, queue)
4223 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4224 return 0;
4225 return 1;
79111d08 4226 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 4227 case IBMVFC_HOST_ACTION_INIT:
4228 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
072b91f9 4229 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4230 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 4231 case IBMVFC_HOST_ACTION_QUERY:
73ee5d86
BK		 4232 case IBMVFC_HOST_ACTION_RESET:
4233 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 4234 default:
4235 break;
f36cfe6a 4236 }
072b91f9
BK		 4237
4238 return 1;
4239}
4240
4241/**
4242 * ibmvfc_work_to_do - Is there task level work to do?
4243 * @vhost: ibmvfc host struct
4244 *
4245 * Returns:
4246 * 1 if work to do / 0 if not
4247 **/
4248static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4249{
4250 unsigned long flags;
4251 int rc;
4252
4253 spin_lock_irqsave(vhost->host->host_lock, flags);
4254 rc = __ibmvfc_work_to_do(vhost);
4255 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4256 return rc;
4257}
4258
4259/**
4260 * ibmvfc_log_ae - Log async events if necessary
4261 * @vhost: ibmvfc host struct
4262 * @events: events to log
4263 *
4264 **/
4265static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4266{
4267 if (events & IBMVFC_AE_RSCN)
4268 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4269 if ((events & IBMVFC_AE_LINKDOWN) &&
4270 vhost->state >= IBMVFC_HALTED)
4271 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4272 if ((events & IBMVFC_AE_LINKUP) &&
4273 vhost->state == IBMVFC_INITIALIZING)
4274 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4275}
4276
4277/**
4278 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4279 * @tgt: ibmvfc target struct
4280 *
4281 **/
4282static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4283{
4284 struct ibmvfc_host *vhost = tgt->vhost;
43c8da90 4285 struct fc_rport *rport;
072b91f9
BK		 4286 unsigned long flags;
4287
43c8da90
BK		 4288 tgt_dbg(tgt, "Adding rport\n");
4289 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4290 spin_lock_irqsave(vhost->host->host_lock, flags);
4291
4292 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4293 tgt_dbg(tgt, "Deleting rport\n");
4294 list_del(&tgt->queue);
d5da3040 4295 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
0883e3b3 4296 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4297 fc_remote_port_delete(rport);
4298 del_timer_sync(&tgt->timer);
4299 kref_put(&tgt->kref, ibmvfc_release_tgt);
0883e3b3 4300 return;
d5da3040
BK		 4301 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4302 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4303 return;
0883e3b3
BK		 4304 }
4305
072b91f9
BK		 4306 if (rport) {
4307 tgt_dbg(tgt, "rport add succeeded\n");
43c8da90 4308 tgt->rport = rport;
0aab6c3f 4309 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4310 rport->supported_classes = 0;
52d7e861 4311 tgt->target_id = rport->scsi_target_id;
0aab6c3f 4312 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4313 rport->supported_classes |= FC_COS_CLASS1;
0aab6c3f 4314 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4315 rport->supported_classes |= FC_COS_CLASS2;
0aab6c3f 4316 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
072b91f9 4317 rport->supported_classes |= FC_COS_CLASS3;
d31429e1 4318 if (rport->rqst_q)
8a78362c 4319 blk_queue_max_segments(rport->rqst_q, 1);
072b91f9
BK		 4320 } else
4321 tgt_dbg(tgt, "rport add failed\n");
4322 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4323}
4324
4325/**
4326 * ibmvfc_do_work - Do task level work
4327 * @vhost: ibmvfc host struct
4328 *
4329 **/
4330static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4331{
4332 struct ibmvfc_target *tgt;
4333 unsigned long flags;
4334 struct fc_rport *rport;
73ee5d86 4335 int rc;
072b91f9
BK		 4336
4337 ibmvfc_log_ae(vhost, vhost->events_to_log);
4338 spin_lock_irqsave(vhost->host->host_lock, flags);
4339 vhost->events_to_log = 0;
4340 switch (vhost->action) {
4341 case IBMVFC_HOST_ACTION_NONE:
79111d08 4342 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4343 case IBMVFC_HOST_ACTION_INIT_WAIT:
4344 break;
73ee5d86
BK		 4345 case IBMVFC_HOST_ACTION_RESET:
4346 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4347 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4348 rc = ibmvfc_reset_crq(vhost);
4349 spin_lock_irqsave(vhost->host->host_lock, flags);
d24099df
BK		 4350 if (rc == H_CLOSED)
4351 vio_enable_interrupts(to_vio_dev(vhost->dev));
38553564
BK		 4352 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4353 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
73ee5d86
BK		 4354 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4355 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4356 }
4357 break;
4358 case IBMVFC_HOST_ACTION_REENABLE:
4359 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4360 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4361 rc = ibmvfc_reenable_crq_queue(vhost);
4362 spin_lock_irqsave(vhost->host->host_lock, flags);
4363 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4364 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4365 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4366 }
4367 break;
79111d08
BK		 4368 case IBMVFC_HOST_ACTION_LOGO:
4369 vhost->job_step(vhost);
4370 break;
072b91f9
BK		 4371 case IBMVFC_HOST_ACTION_INIT:
4372 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
1c41fa82
BK		 4373 if (vhost->delay_init) {
4374 vhost->delay_init = 0;
4375 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2131b33 4376 ssleep(15);
1c41fa82
BK		 4377 return;
4378 } else
4379 vhost->job_step(vhost);
072b91f9
BK		 4380 break;
4381 case IBMVFC_HOST_ACTION_QUERY:
4382 list_for_each_entry(tgt, &vhost->targets, queue)
4383 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4384 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4385 break;
4386 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4387 list_for_each_entry(tgt, &vhost->targets, queue) {
4388 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4389 tgt->job_step(tgt);
4390 break;
4391 }
4392 }
4393
4394 if (!ibmvfc_dev_init_to_do(vhost))
4395 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4396 break;
4397 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4398 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 4399 list_for_each_entry(tgt, &vhost->targets, queue) {
4400 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4401 tgt_dbg(tgt, "Deleting rport\n");
4402 rport = tgt->rport;
4403 tgt->rport = NULL;
4404 list_del(&tgt->queue);
d5da3040 4405 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
072b91f9
BK		 4406 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4407 if (rport)
4408 fc_remote_port_delete(rport);
10501e1c 4409 del_timer_sync(&tgt->timer);
072b91f9
BK		 4410 kref_put(&tgt->kref, ibmvfc_release_tgt);
4411 return;
4412 }
4413 }
4414
4415 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499 4416 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
43c8da90
BK		 4417 if (vhost->reinit) {
4418 vhost->reinit = 0;
4419 scsi_block_requests(vhost->host);
4420 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4421 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4422 } else {
4423 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4424 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4425 wake_up(&vhost->init_wait_q);
4426 schedule_work(&vhost->rport_add_work_q);
4427 vhost->init_retries = 0;
4428 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4429 scsi_unblock_requests(vhost->host);
4430 }
4431
10e79499
BK		 4432 return;
4433 } else {
4434 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4435 vhost->job_step = ibmvfc_discover_targets;
4436 }
072b91f9
BK		 4437 } else {
4438 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4439 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4440 scsi_unblock_requests(vhost->host);
4441 wake_up(&vhost->init_wait_q);
4442 return;
4443 }
4444 break;
4445 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4446 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4447 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4448 ibmvfc_alloc_targets(vhost);
4449 spin_lock_irqsave(vhost->host->host_lock, flags);
4450 break;
4451 case IBMVFC_HOST_ACTION_TGT_INIT:
4452 list_for_each_entry(tgt, &vhost->targets, queue) {
4453 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4454 tgt->job_step(tgt);
4455 break;
4456 }
4457 }
4458
10e79499
BK		 4459 if (!ibmvfc_dev_init_to_do(vhost))
4460 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9 4461 break;
072b91f9
BK		 4462 default:
4463 break;
f36cfe6a 4464 }
072b91f9
BK		 4465
4466 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4467}
4468
4469/**
4470 * ibmvfc_work - Do task level work
4471 * @data: ibmvfc host struct
4472 *
4473 * Returns:
4474 * zero
4475 **/
4476static int ibmvfc_work(void *data)
4477{
4478 struct ibmvfc_host *vhost = data;
4479 int rc;
4480
8698a745 4481 set_user_nice(current, MIN_NICE);
072b91f9
BK		 4482
4483 while (1) {
4484 rc = wait_event_interruptible(vhost->work_wait_q,
4485 ibmvfc_work_to_do(vhost));
4486
4487 BUG_ON(rc);
4488
4489 if (kthread_should_stop())
4490 break;
4491
4492 ibmvfc_do_work(vhost);
4493 }
4494
4495 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4496 return 0;
4497}
4498
4499/**
4500 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4501 * @vhost: ibmvfc host struct
4502 *
4503 * Allocates a page for messages, maps it for dma, and registers
4504 * the crq with the hypervisor.
4505 *
4506 * Return value:
4507 * zero on success / other on failure
4508 **/
4509static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4510{
4511 int rc, retrc = -ENOMEM;
4512 struct device *dev = vhost->dev;
4513 struct vio_dev *vdev = to_vio_dev(dev);
4514 struct ibmvfc_crq_queue *crq = &vhost->crq;
4515
4516 ENTER;
4517 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4518
4519 if (!crq->msgs)
4520 return -ENOMEM;
4521
4522 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4523 crq->msg_token = dma_map_single(dev, crq->msgs,
4524 PAGE_SIZE, DMA_BIDIRECTIONAL);
4525
8d8bb39b 4526 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 4527 goto map_failed;
4528
4529 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4530 crq->msg_token, PAGE_SIZE);
4531
4532 if (rc == H_RESOURCE)
4533 /* maybe kexecing and resource is busy. try a reset */
4534 retrc = rc = ibmvfc_reset_crq(vhost);
4535
4536 if (rc == H_CLOSED)
4537 dev_warn(dev, "Partner adapter not ready\n");
4538 else if (rc) {
4539 dev_warn(dev, "Error %d opening adapter\n", rc);
4540 goto reg_crq_failed;
4541 }
4542
4543 retrc = 0;
4544
039a0898
BK		 4545 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4546
072b91f9
BK		 4547 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4548 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4549 goto req_irq_failed;
4550 }
4551
4552 if ((rc = vio_enable_interrupts(vdev))) {
4553 dev_err(dev, "Error %d enabling interrupts\n", rc);
4554 goto req_irq_failed;
4555 }
4556
4557 crq->cur = 0;
4558 LEAVE;
4559 return retrc;
4560
4561req_irq_failed:
039a0898 4562 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 4563 do {
4564 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4565 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4566reg_crq_failed:
4567 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4568map_failed:
4569 free_page((unsigned long)crq->msgs);
4570 return retrc;
4571}
4572
4573/**
4574 * ibmvfc_free_mem - Free memory for vhost
4575 * @vhost: ibmvfc host struct
4576 *
4577 * Return value:
4578 * none
4579 **/
4580static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4581{
4582 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4583
4584 ENTER;
4585 mempool_destroy(vhost->tgt_pool);
4586 kfree(vhost->trace);
4587 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4588 vhost->disc_buf_dma);
4589 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4590 vhost->login_buf, vhost->login_buf_dma);
4591 dma_pool_destroy(vhost->sg_pool);
4592 dma_unmap_single(vhost->dev, async_q->msg_token,
4593 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4594 free_page((unsigned long)async_q->msgs);
4595 LEAVE;
4596}
4597
4598/**
4599 * ibmvfc_alloc_mem - Allocate memory for vhost
4600 * @vhost: ibmvfc host struct
4601 *
4602 * Return value:
4603 * 0 on success / non-zero on failure
4604 **/
4605static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4606{
4607 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4608 struct device *dev = vhost->dev;
4609
4610 ENTER;
4611 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4612 if (!async_q->msgs) {
4613 dev_err(dev, "Couldn't allocate async queue.\n");
4614 goto nomem;
4615 }
4616
4617 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4618 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4619 async_q->size * sizeof(*async_q->msgs),
4620 DMA_BIDIRECTIONAL);
4621
8d8bb39b 4622 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 4623 dev_err(dev, "Failed to map async queue\n");
4624 goto free_async_crq;
4625 }
4626
4627 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4628 SG_ALL * sizeof(struct srp_direct_buf),
4629 sizeof(struct srp_direct_buf), 0);
4630
4631 if (!vhost->sg_pool) {
4632 dev_err(dev, "Failed to allocate sg pool\n");
4633 goto unmap_async_crq;
4634 }
4635
4636 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4637 &vhost->login_buf_dma, GFP_KERNEL);
4638
4639 if (!vhost->login_buf) {
4640 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4641 goto free_sg_pool;
4642 }
4643
4644 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4645 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4646 &vhost->disc_buf_dma, GFP_KERNEL);
4647
4648 if (!vhost->disc_buf) {
4649 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4650 goto free_login_buffer;
4651 }
4652
4653 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4654 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4655
4656 if (!vhost->trace)
4657 goto free_disc_buffer;
4658
d6886692 4659 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
072b91f9
BK		 4660 sizeof(struct ibmvfc_target));
4661
4662 if (!vhost->tgt_pool) {
4663 dev_err(dev, "Couldn't allocate target memory pool\n");
4664 goto free_trace;
4665 }
4666
4667 LEAVE;
4668 return 0;
4669
4670free_trace:
4671 kfree(vhost->trace);
4672free_disc_buffer:
4673 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4674 vhost->disc_buf_dma);
4675free_login_buffer:
4676 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4677 vhost->login_buf, vhost->login_buf_dma);
4678free_sg_pool:
4679 dma_pool_destroy(vhost->sg_pool);
4680unmap_async_crq:
4681 dma_unmap_single(dev, async_q->msg_token,
4682 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4683free_async_crq:
4684 free_page((unsigned long)async_q->msgs);
4685nomem:
4686 LEAVE;
4687 return -ENOMEM;
4688}
4689
43c8da90
BK		 4690/**
4691 * ibmvfc_rport_add_thread - Worker thread for rport adds
4692 * @work: work struct
4693 *
4694 **/
4695static void ibmvfc_rport_add_thread(struct work_struct *work)
4696{
4697 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4698 rport_add_work_q);
4699 struct ibmvfc_target *tgt;
4700 struct fc_rport *rport;
4701 unsigned long flags;
4702 int did_work;
4703
4704 ENTER;
4705 spin_lock_irqsave(vhost->host->host_lock, flags);
4706 do {
4707 did_work = 0;
4708 if (vhost->state != IBMVFC_ACTIVE)
4709 break;
4710
4711 list_for_each_entry(tgt, &vhost->targets, queue) {
4712 if (tgt->add_rport) {
4713 did_work = 1;
4714 tgt->add_rport = 0;
4715 kref_get(&tgt->kref);
4716 rport = tgt->rport;
4717 if (!rport) {
4718 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4719 ibmvfc_tgt_add_rport(tgt);
4720 } else if (get_device(&rport->dev)) {
4721 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4722 tgt_dbg(tgt, "Setting rport roles\n");
4723 fc_remote_port_rolechg(rport, tgt->ids.roles);
4724 put_device(&rport->dev);
0073887a
DC		 4725 } else {
4726 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4727 }
4728
4729 kref_put(&tgt->kref, ibmvfc_release_tgt);
4730 spin_lock_irqsave(vhost->host->host_lock, flags);
4731 break;
4732 }
4733 }
4734 } while(did_work);
4735
4736 if (vhost->state == IBMVFC_ACTIVE)
4737 vhost->scan_complete = 1;
4738 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4739 LEAVE;
4740}
4741
072b91f9
BK		 4742/**
4743 * ibmvfc_probe - Adapter hot plug add entry point
4744 * @vdev: vio device struct
4745 * @id: vio device id struct
4746 *
4747 * Return value:
4748 * 0 on success / non-zero on failure
4749 **/
4750static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4751{
4752 struct ibmvfc_host *vhost;
4753 struct Scsi_Host *shost;
4754 struct device *dev = &vdev->dev;
4755 int rc = -ENOMEM;
4756
4757 ENTER;
4758 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4759 if (!shost) {
4760 dev_err(dev, "Couldn't allocate host data\n");
4761 goto out;
4762 }
4763
4764 shost->transportt = ibmvfc_transport_template;
4765 shost->can_queue = max_requests;
4766 shost->max_lun = max_lun;
4767 shost->max_id = max_targets;
4768 shost->max_sectors = IBMVFC_MAX_SECTORS;
4769 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4770 shost->unique_id = shost->host_no;
4771
4772 vhost = shost_priv(shost);
4773 INIT_LIST_HEAD(&vhost->sent);
4774 INIT_LIST_HEAD(&vhost->free);
4775 INIT_LIST_HEAD(&vhost->targets);
4776 sprintf(vhost->name, IBMVFC_NAME);
4777 vhost->host = shost;
4778 vhost->dev = dev;
4779 vhost->partition_number = -1;
4780 vhost->log_level = log_level;
10501e1c 4781 vhost->task_set = 1;
072b91f9
BK		 4782 strcpy(vhost->partition_name, "UNKNOWN");
4783 init_waitqueue_head(&vhost->work_wait_q);
4784 init_waitqueue_head(&vhost->init_wait_q);
43c8da90 4785 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
d31429e1 4786 mutex_init(&vhost->passthru_mutex);
072b91f9
BK		 4787
4788 if ((rc = ibmvfc_alloc_mem(vhost)))
4789 goto free_scsi_host;
4790
4791 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4792 shost->host_no);
4793
4794 if (IS_ERR(vhost->work_thread)) {
4795 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4796 PTR_ERR(vhost->work_thread));
4797 goto free_host_mem;
4798 }
4799
4800 if ((rc = ibmvfc_init_crq(vhost))) {
4801 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4802 goto kill_kthread;
4803 }
4804
4805 if ((rc = ibmvfc_init_event_pool(vhost))) {
4806 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4807 goto release_crq;
4808 }
4809
4810 if ((rc = scsi_add_host(shost, dev)))
4811 goto release_event_pool;
4812
a5110f29
MC		 4813 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4814
072b91f9
BK		 4815 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4816 &ibmvfc_trace_attr))) {
4817 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4818 goto remove_shost;
4819 }
4820
d31429e1 4821 if (shost_to_fc_host(shost)->rqst_q)
8a78362c 4822 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
072b91f9
BK		 4823 dev_set_drvdata(dev, vhost);
4824 spin_lock(&ibmvfc_driver_lock);
4825 list_add_tail(&vhost->queue, &ibmvfc_head);
4826 spin_unlock(&ibmvfc_driver_lock);
4827
4828 ibmvfc_send_crq_init(vhost);
4829 scsi_scan_host(shost);
4830 return 0;
4831
4832remove_shost:
4833 scsi_remove_host(shost);
4834release_event_pool:
4835 ibmvfc_free_event_pool(vhost);
4836release_crq:
4837 ibmvfc_release_crq_queue(vhost);
4838kill_kthread:
4839 kthread_stop(vhost->work_thread);
4840free_host_mem:
4841 ibmvfc_free_mem(vhost);
4842free_scsi_host:
4843 scsi_host_put(shost);
4844out:
4845 LEAVE;
4846 return rc;
4847}
4848
4849/**
4850 * ibmvfc_remove - Adapter hot plug remove entry point
4851 * @vdev: vio device struct
4852 *
4853 * Return value:
4854 * 0
4855 **/
4856static int ibmvfc_remove(struct vio_dev *vdev)
4857{
4858 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4859 unsigned long flags;
4860
4861 ENTER;
4862 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
70431105
BK		 4863
4864 spin_lock_irqsave(vhost->host->host_lock, flags);
2d0da2a4 4865 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
70431105
BK		 4866 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4867
2d0da2a4
BK		 4868 ibmvfc_wait_while_resetting(vhost);
4869 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 4870 kthread_stop(vhost->work_thread);
4871 fc_remove_host(vhost->host);
4872 scsi_remove_host(vhost->host);
072b91f9
BK		 4873
4874 spin_lock_irqsave(vhost->host->host_lock, flags);
4875 ibmvfc_purge_requests(vhost, DID_ERROR);
4876 ibmvfc_free_event_pool(vhost);
4877 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4878
4879 ibmvfc_free_mem(vhost);
4880 spin_lock(&ibmvfc_driver_lock);
4881 list_del(&vhost->queue);
4882 spin_unlock(&ibmvfc_driver_lock);
4883 scsi_host_put(vhost->host);
4884 LEAVE;
4885 return 0;
4886}
4887
b0f4d4cf
BK		 4888/**
4889 * ibmvfc_resume - Resume from suspend
4890 * @dev: device struct
4891 *
4892 * We may have lost an interrupt across suspend/resume, so kick the
4893 * interrupt handler
4894 *
4895 */
4896static int ibmvfc_resume(struct device *dev)
4897{
4898 unsigned long flags;
4899 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4900 struct vio_dev *vdev = to_vio_dev(dev);
4901
4902 spin_lock_irqsave(vhost->host->host_lock, flags);
4903 vio_disable_interrupts(vdev);
4904 tasklet_schedule(&vhost->tasklet);
4905 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4906 return 0;
4907}
4908
39c1ffec
BK		 4909/**
4910 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4911 * @vdev: vio device struct
4912 *
4913 * Return value:
4914 * Number of bytes the driver will need to DMA map at the same time in
4915 * order to perform well.
4916 */
4917static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4918{
4919 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4920 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4921}
4922
e4df3eaa 4923static const struct vio_device_id ibmvfc_device_table[] = {
072b91f9
BK		 4924 {"fcp", "IBM,vfc-client"},
4925 { "", "" }
4926};
4927MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4928
e4a80c31 4929static const struct dev_pm_ops ibmvfc_pm_ops = {
b0f4d4cf
BK		 4930 .resume = ibmvfc_resume
4931};
4932
072b91f9
BK		 4933static struct vio_driver ibmvfc_driver = {
4934 .id_table = ibmvfc_device_table,
4935 .probe = ibmvfc_probe,
4936 .remove = ibmvfc_remove,
39c1ffec 4937 .get_desired_dma = ibmvfc_get_desired_dma,
cb52d897
BH		 4938 .name = IBMVFC_NAME,
4939 .pm = &ibmvfc_pm_ops,
072b91f9
BK		 4940};
4941
4942static struct fc_function_template ibmvfc_transport_functions = {
4943 .show_host_fabric_name = 1,
4944 .show_host_node_name = 1,
4945 .show_host_port_name = 1,
4946 .show_host_supported_classes = 1,
4947 .show_host_port_type = 1,
4948 .show_host_port_id = 1,
9ab3610f 4949 .show_host_maxframe_size = 1,
072b91f9
BK		 4950
4951 .get_host_port_state = ibmvfc_get_host_port_state,
4952 .show_host_port_state = 1,
4953
4954 .get_host_speed = ibmvfc_get_host_speed,
4955 .show_host_speed = 1,
4956
4957 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4958 .terminate_rport_io = ibmvfc_terminate_rport_io,
4959
4960 .show_rport_maxframe_size = 1,
4961 .show_rport_supported_classes = 1,
4962
4963 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4964 .show_rport_dev_loss_tmo = 1,
4965
4966 .get_starget_node_name = ibmvfc_get_starget_node_name,
4967 .show_starget_node_name = 1,
4968
4969 .get_starget_port_name = ibmvfc_get_starget_port_name,
4970 .show_starget_port_name = 1,
4971
4972 .get_starget_port_id = ibmvfc_get_starget_port_id,
4973 .show_starget_port_id = 1,
d31429e1
BK		 4974
4975 .bsg_request = ibmvfc_bsg_request,
4976 .bsg_timeout = ibmvfc_bsg_timeout,
072b91f9
BK		 4977};
4978
4979/**
4980 * ibmvfc_module_init - Initialize the ibmvfc module
4981 *
4982 * Return value:
4983 * 0 on success / other on failure
4984 **/
4985static int __init ibmvfc_module_init(void)
4986{
4987 int rc;
4988
4989 if (!firmware_has_feature(FW_FEATURE_VIO))
4990 return -ENODEV;
4991
4992 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4993 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4994
4995 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4996 if (!ibmvfc_transport_template)
4997 return -ENOMEM;
4998
4999 rc = vio_register_driver(&ibmvfc_driver);
5000 if (rc)
5001 fc_release_transport(ibmvfc_transport_template);
5002 return rc;
5003}
5004
5005/**
5006 * ibmvfc_module_exit - Teardown the ibmvfc module
5007 *
5008 * Return value:
5009 * nothing
5010 **/
5011static void __exit ibmvfc_module_exit(void)
5012{
5013 vio_unregister_driver(&ibmvfc_driver);
5014 fc_release_transport(ibmvfc_transport_template);
5015}
5016
5017module_init(ibmvfc_module_init);
5018module_exit(ibmvfc_module_exit);
Linux 6.x block layer and io_uring tree(s)