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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
[linux-2.6-block.git] / drivers / scsi / ibmvscsi / ibmvfc.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
072b91f9
BK		 2/*
3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter
4 *
5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6 *
7 * Copyright (C) IBM Corporation, 2008
072b91f9
BK		 8 */
9
10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/dma-mapping.h>
13#include <linux/dmapool.h>
14#include <linux/delay.h>
15#include <linux/interrupt.h>
16#include <linux/kthread.h>
5a0e3ad6 17#include <linux/slab.h>
072b91f9 18#include <linux/of.h>
b0f4d4cf 19#include <linux/pm.h>
072b91f9 20#include <linux/stringify.h>
75cc8cfc 21#include <linux/bsg-lib.h>
072b91f9
BK		 22#include <asm/firmware.h>
23#include <asm/irq.h>
24#include <asm/vio.h>
25#include <scsi/scsi.h>
26#include <scsi/scsi_cmnd.h>
27#include <scsi/scsi_host.h>
28#include <scsi/scsi_device.h>
29#include <scsi/scsi_tcq.h>
30#include <scsi/scsi_transport_fc.h>
d31429e1 31#include <scsi/scsi_bsg_fc.h>
072b91f9
BK		 32#include "ibmvfc.h"
33
34static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
35static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
1abf635d 36static u64 max_lun = IBMVFC_MAX_LUN;
072b91f9
BK		 37static unsigned int max_targets = IBMVFC_MAX_TARGETS;
38static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
39static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
072b91f9
BK		 40static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
41static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
a6104b1e 42static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
072b91f9
BK		 43static LIST_HEAD(ibmvfc_head);
44static DEFINE_SPINLOCK(ibmvfc_driver_lock);
45static struct scsi_transport_template *ibmvfc_transport_template;
46
47MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
48MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
49MODULE_LICENSE("GPL");
50MODULE_VERSION(IBMVFC_DRIVER_VERSION);
51
52module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
53MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
54 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
55module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
56MODULE_PARM_DESC(default_timeout,
57 "Default timeout in seconds for initialization and EH commands. "
58 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
59module_param_named(max_requests, max_requests, uint, S_IRUGO);
60MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
61 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
1abf635d 62module_param_named(max_lun, max_lun, ullong, S_IRUGO);
072b91f9
BK		 63MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
64 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
65module_param_named(max_targets, max_targets, uint, S_IRUGO);
66MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
67 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
545ef9a2 68module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
072b91f9
BK		 69MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
70 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
71module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
72MODULE_PARM_DESC(debug, "Enable driver debug information. "
73 "[Default=" __stringify(IBMVFC_DEBUG) "]");
072b91f9
BK		 74module_param_named(log_level, log_level, uint, 0);
75MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
76 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
a6104b1e 77module_param_named(cls3_error, cls3_error, uint, 0);
6c46301f 78MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
a6104b1e 79 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
072b91f9
BK		 80
81static const struct {
82 u16 status;
83 u16 error;
84 u8 result;
85 u8 retry;
86 int log;
87 char *name;
88} cmd_status [] = {
89 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
90 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
91 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
752b3232 92 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
072b91f9
BK		 93 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
94 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
95 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
96 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
97 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
98 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
99 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
100 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
497f9c50 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
072b91f9
BK		 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
103
104 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
105 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
752b3232
BK		 106 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
107 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
072b91f9 108 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
752b3232
BK		 109 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
110 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
072b91f9 111 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
646d3857 112 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
072b91f9
BK		 113 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
114
115 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
116 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
117 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
118 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
119 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
120 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
121 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
122 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
123 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
124 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
125 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
126
127 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
95237c25 128 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." },
072b91f9
BK		 129};
130
131static void ibmvfc_npiv_login(struct ibmvfc_host *);
132static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
133static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
134static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
79111d08 135static void ibmvfc_npiv_logout(struct ibmvfc_host *);
072b91f9
BK		 136
137static const char *unknown_error = "unknown error";
138
139#ifdef CONFIG_SCSI_IBMVFC_TRACE
140/**
141 * ibmvfc_trc_start - Log a start trace entry
142 * @evt: ibmvfc event struct
143 *
144 **/
145static void ibmvfc_trc_start(struct ibmvfc_event *evt)
146{
147 struct ibmvfc_host *vhost = evt->vhost;
148 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
149 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
150 struct ibmvfc_trace_entry *entry;
151
152 entry = &vhost->trace[vhost->trace_index++];
153 entry->evt = evt;
154 entry->time = jiffies;
155 entry->fmt = evt->crq.format;
156 entry->type = IBMVFC_TRC_START;
157
158 switch (entry->fmt) {
159 case IBMVFC_CMD_FORMAT:
160 entry->op_code = vfc_cmd->iu.cdb[0];
0aab6c3f 161 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 162 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
163 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f 164 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len);
072b91f9
BK		 165 break;
166 case IBMVFC_MAD_FORMAT:
0aab6c3f 167 entry->op_code = be32_to_cpu(mad->opcode);
072b91f9
BK		 168 break;
169 default:
170 break;
f36cfe6a 171 }
072b91f9
BK		 172}
173
174/**
175 * ibmvfc_trc_end - Log an end trace entry
176 * @evt: ibmvfc event struct
177 *
178 **/
179static void ibmvfc_trc_end(struct ibmvfc_event *evt)
180{
181 struct ibmvfc_host *vhost = evt->vhost;
182 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
183 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
184 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++];
185
186 entry->evt = evt;
187 entry->time = jiffies;
188 entry->fmt = evt->crq.format;
189 entry->type = IBMVFC_TRC_END;
190
191 switch (entry->fmt) {
192 case IBMVFC_CMD_FORMAT:
193 entry->op_code = vfc_cmd->iu.cdb[0];
0aab6c3f 194 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
072b91f9
BK		 195 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun);
196 entry->tmf_flags = vfc_cmd->iu.tmf_flags;
0aab6c3f
TD		 197 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
198 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
072b91f9
BK		 199 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags;
200 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code;
201 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status;
202 break;
203 case IBMVFC_MAD_FORMAT:
0aab6c3f
TD		 204 entry->op_code = be32_to_cpu(mad->opcode);
205 entry->u.end.status = be16_to_cpu(mad->status);
072b91f9
BK		 206 break;
207 default:
208 break;
209
f36cfe6a 210 }
072b91f9
BK		 211}
212
213#else
214#define ibmvfc_trc_start(evt) do { } while (0)
215#define ibmvfc_trc_end(evt) do { } while (0)
216#endif
217
218/**
219 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response
220 * @status: status / error class
221 * @error: error
222 *
223 * Return value:
224 * index into cmd_status / -EINVAL on failure
225 **/
226static int ibmvfc_get_err_index(u16 status, u16 error)
227{
228 int i;
229
230 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
231 if ((cmd_status[i].status & status) == cmd_status[i].status &&
232 cmd_status[i].error == error)
233 return i;
234
235 return -EINVAL;
236}
237
238/**
239 * ibmvfc_get_cmd_error - Find the error description for the fcp response
240 * @status: status / error class
241 * @error: error
242 *
243 * Return value:
244 * error description string
245 **/
246static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
247{
248 int rc = ibmvfc_get_err_index(status, error);
249 if (rc >= 0)
250 return cmd_status[rc].name;
251 return unknown_error;
252}
253
254/**
255 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response
256 * @vfc_cmd: ibmvfc command struct
257 *
258 * Return value:
259 * SCSI result value to return for completed command
260 **/
261static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd)
262{
263 int err;
264 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
0aab6c3f 265 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 266
267 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
4a2837d4 268 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
072b91f9
BK		 269 rsp->data.info.rsp_code))
270 return DID_ERROR << 16;
271
0aab6c3f 272 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 273 if (err >= 0)
274 return rsp->scsi_status | (cmd_status[err].result << 16);
275 return rsp->scsi_status | (DID_ERROR << 16);
276}
277
278/**
279 * ibmvfc_retry_cmd - Determine if error status is retryable
280 * @status: status / error class
281 * @error: error
282 *
283 * Return value:
284 * 1 if error should be retried / 0 if it should not
285 **/
286static int ibmvfc_retry_cmd(u16 status, u16 error)
287{
288 int rc = ibmvfc_get_err_index(status, error);
289
290 if (rc >= 0)
291 return cmd_status[rc].retry;
292 return 1;
293}
294
295static const char *unknown_fc_explain = "unknown fc explain";
296
297static const struct {
298 u16 fc_explain;
299 char *name;
300} ls_explain [] = {
301 { 0x00, "no additional explanation" },
302 { 0x01, "service parameter error - options" },
303 { 0x03, "service parameter error - initiator control" },
304 { 0x05, "service parameter error - recipient control" },
305 { 0x07, "service parameter error - received data field size" },
306 { 0x09, "service parameter error - concurrent seq" },
307 { 0x0B, "service parameter error - credit" },
308 { 0x0D, "invalid N_Port/F_Port_Name" },
309 { 0x0E, "invalid node/Fabric Name" },
310 { 0x0F, "invalid common service parameters" },
311 { 0x11, "invalid association header" },
312 { 0x13, "association header required" },
313 { 0x15, "invalid originator S_ID" },
314 { 0x17, "invalid OX_ID-RX-ID combination" },
315 { 0x19, "command (request) already in progress" },
316 { 0x1E, "N_Port Login requested" },
317 { 0x1F, "Invalid N_Port_ID" },
318};
319
320static const struct {
321 u16 fc_explain;
322 char *name;
323} gs_explain [] = {
324 { 0x00, "no additional explanation" },
325 { 0x01, "port identifier not registered" },
326 { 0x02, "port name not registered" },
327 { 0x03, "node name not registered" },
328 { 0x04, "class of service not registered" },
329 { 0x06, "initial process associator not registered" },
330 { 0x07, "FC-4 TYPEs not registered" },
331 { 0x08, "symbolic port name not registered" },
332 { 0x09, "symbolic node name not registered" },
333 { 0x0A, "port type not registered" },
334 { 0xF0, "authorization exception" },
335 { 0xF1, "authentication exception" },
336 { 0xF2, "data base full" },
337 { 0xF3, "data base empty" },
338 { 0xF4, "processing request" },
339 { 0xF5, "unable to verify connection" },
340 { 0xF6, "devices not in a common zone" },
341};
342
343/**
344 * ibmvfc_get_ls_explain - Return the FC Explain description text
345 * @status: FC Explain status
346 *
347 * Returns:
348 * error string
349 **/
350static const char *ibmvfc_get_ls_explain(u16 status)
351{
352 int i;
353
354 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
355 if (ls_explain[i].fc_explain == status)
356 return ls_explain[i].name;
357
358 return unknown_fc_explain;
359}
360
361/**
362 * ibmvfc_get_gs_explain - Return the FC Explain description text
363 * @status: FC Explain status
364 *
365 * Returns:
366 * error string
367 **/
368static const char *ibmvfc_get_gs_explain(u16 status)
369{
370 int i;
371
372 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
373 if (gs_explain[i].fc_explain == status)
374 return gs_explain[i].name;
375
376 return unknown_fc_explain;
377}
378
379static const struct {
380 enum ibmvfc_fc_type fc_type;
381 char *name;
382} fc_type [] = {
383 { IBMVFC_FABRIC_REJECT, "fabric reject" },
384 { IBMVFC_PORT_REJECT, "port reject" },
385 { IBMVFC_LS_REJECT, "ELS reject" },
386 { IBMVFC_FABRIC_BUSY, "fabric busy" },
387 { IBMVFC_PORT_BUSY, "port busy" },
388 { IBMVFC_BASIC_REJECT, "basic reject" },
389};
390
391static const char *unknown_fc_type = "unknown fc type";
392
393/**
394 * ibmvfc_get_fc_type - Return the FC Type description text
395 * @status: FC Type error status
396 *
397 * Returns:
398 * error string
399 **/
400static const char *ibmvfc_get_fc_type(u16 status)
401{
402 int i;
403
404 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
405 if (fc_type[i].fc_type == status)
406 return fc_type[i].name;
407
408 return unknown_fc_type;
409}
410
411/**
412 * ibmvfc_set_tgt_action - Set the next init action for the target
413 * @tgt: ibmvfc target struct
414 * @action: action to perform
415 *
416 **/
417static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
418 enum ibmvfc_target_action action)
419{
420 switch (tgt->action) {
421 case IBMVFC_TGT_ACTION_DEL_RPORT:
d5da3040
BK		 422 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
423 tgt->action = action;
424 case IBMVFC_TGT_ACTION_DELETED_RPORT:
072b91f9
BK		 425 break;
426 default:
43c8da90
BK		 427 if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
428 tgt->add_rport = 0;
072b91f9
BK		 429 tgt->action = action;
430 break;
431 }
432}
433
434/**
435 * ibmvfc_set_host_state - Set the state for the host
436 * @vhost: ibmvfc host struct
437 * @state: state to set host to
438 *
439 * Returns:
440 * 0 if state changed / non-zero if not changed
441 **/
442static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
443 enum ibmvfc_host_state state)
444{
445 int rc = 0;
446
447 switch (vhost->state) {
448 case IBMVFC_HOST_OFFLINE:
449 rc = -EINVAL;
450 break;
451 default:
452 vhost->state = state;
453 break;
f36cfe6a 454 }
072b91f9
BK		 455
456 return rc;
457}
458
459/**
460 * ibmvfc_set_host_action - Set the next init action for the host
461 * @vhost: ibmvfc host struct
462 * @action: action to perform
463 *
464 **/
465static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
466 enum ibmvfc_host_action action)
467{
468 switch (action) {
469 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
470 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
471 vhost->action = action;
472 break;
79111d08
BK		 473 case IBMVFC_HOST_ACTION_LOGO_WAIT:
474 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
475 vhost->action = action;
476 break;
072b91f9
BK		 477 case IBMVFC_HOST_ACTION_INIT_WAIT:
478 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
479 vhost->action = action;
480 break;
481 case IBMVFC_HOST_ACTION_QUERY:
482 switch (vhost->action) {
483 case IBMVFC_HOST_ACTION_INIT_WAIT:
484 case IBMVFC_HOST_ACTION_NONE:
43c8da90 485 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 486 vhost->action = action;
487 break;
488 default:
489 break;
f36cfe6a 490 }
072b91f9
BK		 491 break;
492 case IBMVFC_HOST_ACTION_TGT_INIT:
493 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
494 vhost->action = action;
495 break;
496 case IBMVFC_HOST_ACTION_INIT:
497 case IBMVFC_HOST_ACTION_TGT_DEL:
73ee5d86
BK		 498 switch (vhost->action) {
499 case IBMVFC_HOST_ACTION_RESET:
500 case IBMVFC_HOST_ACTION_REENABLE:
501 break;
502 default:
503 vhost->action = action;
504 break;
f36cfe6a 505 }
73ee5d86
BK		 506 break;
507 case IBMVFC_HOST_ACTION_LOGO:
072b91f9 508 case IBMVFC_HOST_ACTION_QUERY_TGTS:
10e79499 509 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 510 case IBMVFC_HOST_ACTION_NONE:
73ee5d86
BK		 511 case IBMVFC_HOST_ACTION_RESET:
512 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 513 default:
514 vhost->action = action;
515 break;
f36cfe6a 516 }
072b91f9
BK		 517}
518
519/**
520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login)
521 * @vhost: ibmvfc host struct
522 *
523 * Return value:
524 * nothing
525 **/
526static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
527{
528 if (vhost->action == IBMVFC_HOST_ACTION_NONE) {
2d0da2a4
BK		 529 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
530 scsi_block_requests(vhost->host);
531 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
532 }
072b91f9
BK		 533 } else
534 vhost->reinit = 1;
535
536 wake_up(&vhost->work_wait_q);
537}
538
539/**
540 * ibmvfc_link_down - Handle a link down event from the adapter
541 * @vhost: ibmvfc host struct
542 * @state: ibmvfc host state to enter
543 *
544 **/
545static void ibmvfc_link_down(struct ibmvfc_host *vhost,
546 enum ibmvfc_host_state state)
547{
548 struct ibmvfc_target *tgt;
549
550 ENTER;
551 scsi_block_requests(vhost->host);
552 list_for_each_entry(tgt, &vhost->targets, queue)
553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
554 ibmvfc_set_host_state(vhost, state);
555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
556 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
557 wake_up(&vhost->work_wait_q);
558 LEAVE;
559}
560
561/**
562 * ibmvfc_init_host - Start host initialization
563 * @vhost: ibmvfc host struct
564 *
565 * Return value:
566 * nothing
567 **/
861890c6 568static void ibmvfc_init_host(struct ibmvfc_host *vhost)
072b91f9
BK		 569{
570 struct ibmvfc_target *tgt;
571
572 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82 573 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 574 dev_err(vhost->dev,
575 "Host initialization retries exceeded. Taking adapter offline\n");
576 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
577 return;
578 }
579 }
580
581 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
861890c6
BK		 582 memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
583 vhost->async_crq.cur = 0;
cf6f10d7 584
072b91f9 585 list_for_each_entry(tgt, &vhost->targets, queue)
5e47167b 586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 587 scsi_block_requests(vhost->host);
588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
589 vhost->job_step = ibmvfc_npiv_login;
590 wake_up(&vhost->work_wait_q);
591 }
592}
593
594/**
595 * ibmvfc_send_crq - Send a CRQ
596 * @vhost: ibmvfc host struct
597 * @word1: the first 64 bits of the data
598 * @word2: the second 64 bits of the data
599 *
600 * Return value:
601 * 0 on success / other on failure
602 **/
603static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
604{
605 struct vio_dev *vdev = to_vio_dev(vhost->dev);
606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
607}
608
609/**
610 * ibmvfc_send_crq_init - Send a CRQ init message
611 * @vhost: ibmvfc host struct
612 *
613 * Return value:
614 * 0 on success / other on failure
615 **/
616static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
617{
618 ibmvfc_dbg(vhost, "Sending CRQ init\n");
619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
620}
621
622/**
623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message
624 * @vhost: ibmvfc host struct
625 *
626 * Return value:
627 * 0 on success / other on failure
628 **/
629static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
630{
631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
633}
634
635/**
636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ
637 * @vhost: ibmvfc host struct
638 *
639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
640 * the crq with the hypervisor.
641 **/
642static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
643{
73ee5d86 644 long rc = 0;
072b91f9
BK		 645 struct vio_dev *vdev = to_vio_dev(vhost->dev);
646 struct ibmvfc_crq_queue *crq = &vhost->crq;
647
648 ibmvfc_dbg(vhost, "Releasing CRQ\n");
649 free_irq(vdev->irq, vhost);
039a0898 650 tasklet_kill(&vhost->tasklet);
072b91f9 651 do {
73ee5d86
BK		 652 if (rc)
653 msleep(100);
072b91f9
BK		 654 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
655 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
656
657 vhost->state = IBMVFC_NO_CRQ;
79111d08 658 vhost->logged_in = 0;
072b91f9
BK		 659 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
660 free_page((unsigned long)crq->msgs);
661}
662
663/**
664 * ibmvfc_reenable_crq_queue - reenables the CRQ
665 * @vhost: ibmvfc host struct
666 *
667 * Return value:
668 * 0 on success / other on failure
669 **/
670static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
671{
73ee5d86 672 int rc = 0;
072b91f9
BK		 673 struct vio_dev *vdev = to_vio_dev(vhost->dev);
674
675 /* Re-enable the CRQ */
676 do {
73ee5d86
BK		 677 if (rc)
678 msleep(100);
072b91f9
BK		 679 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
680 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
681
682 if (rc)
683 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
684
685 return rc;
686}
687
688/**
689 * ibmvfc_reset_crq - resets a crq after a failure
690 * @vhost: ibmvfc host struct
691 *
692 * Return value:
693 * 0 on success / other on failure
694 **/
695static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
696{
73ee5d86
BK		 697 int rc = 0;
698 unsigned long flags;
072b91f9
BK		 699 struct vio_dev *vdev = to_vio_dev(vhost->dev);
700 struct ibmvfc_crq_queue *crq = &vhost->crq;
701
702 /* Close the CRQ */
703 do {
73ee5d86
BK		 704 if (rc)
705 msleep(100);
072b91f9
BK		 706 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
707 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
708
73ee5d86 709 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 710 vhost->state = IBMVFC_NO_CRQ;
79111d08 711 vhost->logged_in = 0;
072b91f9
BK		 712
713 /* Clean out the queue */
714 memset(crq->msgs, 0, PAGE_SIZE);
715 crq->cur = 0;
716
717 /* And re-open it again */
718 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
719 crq->msg_token, PAGE_SIZE);
720
721 if (rc == H_CLOSED)
722 /* Adapter is good, but other end is not ready */
723 dev_warn(vhost->dev, "Partner adapter not ready\n");
724 else if (rc != 0)
725 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
73ee5d86 726 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 727
728 return rc;
729}
730
731/**
732 * ibmvfc_valid_event - Determines if event is valid.
733 * @pool: event_pool that contains the event
734 * @evt: ibmvfc event to be checked for validity
735 *
736 * Return value:
737 * 1 if event is valid / 0 if event is not valid
738 **/
739static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
740 struct ibmvfc_event *evt)
741{
742 int index = evt - pool->events;
743 if (index < 0 || index >= pool->size) /* outside of bounds */
744 return 0;
745 if (evt != pool->events + index) /* unaligned */
746 return 0;
747 return 1;
748}
749
750/**
751 * ibmvfc_free_event - Free the specified event
752 * @evt: ibmvfc_event to be freed
753 *
754 **/
755static void ibmvfc_free_event(struct ibmvfc_event *evt)
756{
757 struct ibmvfc_host *vhost = evt->vhost;
758 struct ibmvfc_event_pool *pool = &vhost->pool;
759
760 BUG_ON(!ibmvfc_valid_event(pool, evt));
761 BUG_ON(atomic_inc_return(&evt->free) != 1);
762 list_add_tail(&evt->queue, &vhost->free);
763}
764
765/**
766 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands
767 * @evt: ibmvfc event struct
768 *
769 * This function does not setup any error status, that must be done
770 * before this function gets called.
771 **/
772static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
773{
774 struct scsi_cmnd *cmnd = evt->cmnd;
775
776 if (cmnd) {
777 scsi_dma_unmap(cmnd);
778 cmnd->scsi_done(cmnd);
779 }
780
ad8dcffa
BK		 781 if (evt->eh_comp)
782 complete(evt->eh_comp);
783
072b91f9
BK		 784 ibmvfc_free_event(evt);
785}
786
787/**
788 * ibmvfc_fail_request - Fail request with specified error code
789 * @evt: ibmvfc event struct
790 * @error_code: error code to fail request with
791 *
792 * Return value:
793 * none
794 **/
795static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
796{
797 if (evt->cmnd) {
798 evt->cmnd->result = (error_code << 16);
799 evt->done = ibmvfc_scsi_eh_done;
800 } else
0aab6c3f 801 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
072b91f9
BK		 802
803 list_del(&evt->queue);
804 del_timer(&evt->timer);
805 ibmvfc_trc_end(evt);
806 evt->done(evt);
807}
808
809/**
810 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests
811 * @vhost: ibmvfc host struct
812 * @error_code: error code to fail requests with
813 *
814 * Return value:
815 * none
816 **/
817static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
818{
819 struct ibmvfc_event *evt, *pos;
820
821 ibmvfc_dbg(vhost, "Purging all requests\n");
822 list_for_each_entry_safe(evt, pos, &vhost->sent, queue)
823 ibmvfc_fail_request(evt, error_code);
824}
825
826/**
79111d08 827 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ
072b91f9
BK		 828 * @vhost: struct ibmvfc host to reset
829 **/
79111d08 830static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
072b91f9 831{
072b91f9 832 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 833 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
834 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
072b91f9
BK		 835}
836
837/**
79111d08 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking)
072b91f9
BK		 839 * @vhost: struct ibmvfc host to reset
840 **/
79111d08
BK		 841static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
842{
843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
845 scsi_block_requests(vhost->host);
846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
847 vhost->job_step = ibmvfc_npiv_logout;
848 wake_up(&vhost->work_wait_q);
849 } else
850 ibmvfc_hard_reset_host(vhost);
851}
852
853/**
854 * ibmvfc_reset_host - Reset the connection to the server
855 * @vhost: ibmvfc host struct
856 **/
072b91f9
BK		 857static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
858{
859 unsigned long flags;
860
861 spin_lock_irqsave(vhost->host->host_lock, flags);
862 __ibmvfc_reset_host(vhost);
863 spin_unlock_irqrestore(vhost->host->host_lock, flags);
864}
865
866/**
867 * ibmvfc_retry_host_init - Retry host initialization if allowed
868 * @vhost: ibmvfc host struct
869 *
7d0e4622
BK		 870 * Returns: 1 if init will be retried / 0 if not
871 *
072b91f9 872 **/
7d0e4622 873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
072b91f9 874{
7d0e4622
BK		 875 int retry = 0;
876
072b91f9 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1c41fa82
BK		 878 vhost->delay_init = 1;
879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
072b91f9
BK		 880 dev_err(vhost->dev,
881 "Host initialization retries exceeded. Taking adapter offline\n");
882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1c41fa82 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
072b91f9 884 __ibmvfc_reset_host(vhost);
7d0e4622 885 else {
072b91f9 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
7d0e4622
BK		 887 retry = 1;
888 }
072b91f9
BK		 889 }
890
891 wake_up(&vhost->work_wait_q);
7d0e4622 892 return retry;
072b91f9
BK		 893}
894
895/**
b3c10489 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking)
072b91f9
BK		 897 * @starget: scsi target struct
898 *
899 * Return value:
900 * ibmvfc_target struct / NULL if not found
901 **/
b3c10489 902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 903{
904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
905 struct ibmvfc_host *vhost = shost_priv(shost);
906 struct ibmvfc_target *tgt;
907
908 list_for_each_entry(tgt, &vhost->targets, queue)
b3c10489
BK		 909 if (tgt->target_id == starget->id) {
910 kref_get(&tgt->kref);
072b91f9 911 return tgt;
b3c10489 912 }
072b91f9
BK		 913 return NULL;
914}
915
916/**
b3c10489 917 * ibmvfc_get_target - Find the specified scsi_target
072b91f9
BK		 918 * @starget: scsi target struct
919 *
920 * Return value:
921 * ibmvfc_target struct / NULL if not found
922 **/
b3c10489 923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
072b91f9
BK		 924{
925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
926 struct ibmvfc_target *tgt;
927 unsigned long flags;
928
929 spin_lock_irqsave(shost->host_lock, flags);
b3c10489 930 tgt = __ibmvfc_get_target(starget);
072b91f9
BK		 931 spin_unlock_irqrestore(shost->host_lock, flags);
932 return tgt;
933}
934
935/**
936 * ibmvfc_get_host_speed - Get host port speed
937 * @shost: scsi host struct
938 *
939 * Return value:
940 * none
941 **/
942static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
943{
944 struct ibmvfc_host *vhost = shost_priv(shost);
945 unsigned long flags;
946
947 spin_lock_irqsave(shost->host_lock, flags);
948 if (vhost->state == IBMVFC_ACTIVE) {
0aab6c3f 949 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
072b91f9
BK		 950 case 1:
951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
952 break;
953 case 2:
954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
955 break;
956 case 4:
957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
958 break;
959 case 8:
960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
961 break;
962 case 10:
963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
964 break;
965 case 16:
966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
967 break;
968 default:
775a42ec 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
0aab6c3f 970 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
072b91f9
BK		 971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
972 break;
973 }
974 } else
975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
976 spin_unlock_irqrestore(shost->host_lock, flags);
977}
978
979/**
980 * ibmvfc_get_host_port_state - Get host port state
981 * @shost: scsi host struct
982 *
983 * Return value:
984 * none
985 **/
986static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
987{
988 struct ibmvfc_host *vhost = shost_priv(shost);
989 unsigned long flags;
990
991 spin_lock_irqsave(shost->host_lock, flags);
992 switch (vhost->state) {
993 case IBMVFC_INITIALIZING:
994 case IBMVFC_ACTIVE:
995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
996 break;
997 case IBMVFC_LINK_DOWN:
998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
999 break;
1000 case IBMVFC_LINK_DEAD:
1001 case IBMVFC_HOST_OFFLINE:
1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1003 break;
1004 case IBMVFC_HALTED:
1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1006 break;
0ae808e0
BK		 1007 case IBMVFC_NO_CRQ:
1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1009 break;
072b91f9
BK		 1010 default:
1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1013 break;
1014 }
1015 spin_unlock_irqrestore(shost->host_lock, flags);
1016}
1017
1018/**
1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout
1020 * @rport: rport struct
1021 * @timeout: timeout value
1022 *
1023 * Return value:
1024 * none
1025 **/
1026static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1027{
1028 if (timeout)
1029 rport->dev_loss_tmo = timeout;
1030 else
1031 rport->dev_loss_tmo = 1;
1032}
1033
b3c10489
BK		 1034/**
1035 * ibmvfc_release_tgt - Free memory allocated for a target
1036 * @kref: kref struct
1037 *
1038 **/
1039static void ibmvfc_release_tgt(struct kref *kref)
1040{
1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1042 kfree(tgt);
1043}
1044
072b91f9
BK		 1045/**
1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name
1047 * @starget: scsi target struct
1048 *
1049 * Return value:
1050 * none
1051 **/
1052static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1053{
b3c10489 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
b3c10489
BK		 1056 if (tgt)
1057 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1058}
1059
1060/**
1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name
1062 * @starget: scsi target struct
1063 *
1064 * Return value:
1065 * none
1066 **/
1067static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1068{
b3c10489 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
b3c10489
BK		 1071 if (tgt)
1072 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1073}
1074
1075/**
1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID
1077 * @starget: scsi target struct
1078 *
1079 * Return value:
1080 * none
1081 **/
1082static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1083{
b3c10489 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
072b91f9 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
b3c10489
BK		 1086 if (tgt)
1087 kref_put(&tgt->kref, ibmvfc_release_tgt);
072b91f9
BK		 1088}
1089
1090/**
1091 * ibmvfc_wait_while_resetting - Wait while the host resets
1092 * @vhost: ibmvfc host struct
1093 *
1094 * Return value:
1095 * 0 on success / other on failure
1096 **/
1097static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1098{
1099 long timeout = wait_event_timeout(vhost->init_wait_q,
3eddc569
BK		 1100 ((vhost->state == IBMVFC_ACTIVE ||
1101 vhost->state == IBMVFC_HOST_OFFLINE ||
1102 vhost->state == IBMVFC_LINK_DEAD) &&
1103 vhost->action == IBMVFC_HOST_ACTION_NONE),
072b91f9
BK		 1104 (init_timeout * HZ));
1105
1106 return timeout ? 0 : -EIO;
1107}
1108
1109/**
1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization
1111 * @shost: scsi host struct
1112 *
1113 * Return value:
1114 * 0 on success / other on failure
1115 **/
1116static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1117{
1118 struct ibmvfc_host *vhost = shost_priv(shost);
1119
1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1121 ibmvfc_reset_host(vhost);
1122 return ibmvfc_wait_while_resetting(vhost);
1123}
1124
1125/**
1126 * ibmvfc_gather_partition_info - Gather info about the LPAR
1127 *
1128 * Return value:
1129 * none
1130 **/
1131static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1132{
1133 struct device_node *rootdn;
1134 const char *name;
1135 const unsigned int *num;
1136
1137 rootdn = of_find_node_by_path("/");
1138 if (!rootdn)
1139 return;
1140
1141 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1142 if (name)
1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1144 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1145 if (num)
1146 vhost->partition_number = *num;
1147 of_node_put(rootdn);
1148}
1149
1150/**
1151 * ibmvfc_set_login_info - Setup info for NPIV login
1152 * @vhost: ibmvfc host struct
1153 *
1154 * Return value:
1155 * none
1156 **/
1157static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1158{
1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
61c7a080 1160 struct device_node *of_node = vhost->dev->of_node;
072b91f9
BK		 1161 const char *location;
1162
1163 memset(login_info, 0, sizeof(*login_info));
1164
0aab6c3f
TD		 1165 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1166 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1167 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1168 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1169 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1170 login_info->vfc_frame_version = cpu_to_be32(1);
1171 login_info->fcp_version = cpu_to_be16(3);
1172 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
072b91f9 1173 if (vhost->client_migrated)
0aab6c3f 1174 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
072b91f9 1175
0aab6c3f
TD		 1176 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1177 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE);
1178 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1179 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs));
072b91f9
BK		 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1181 strncpy(login_info->device_name,
71610f55 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
072b91f9
BK		 1183
1184 location = of_get_property(of_node, "ibm,loc-code", NULL);
71610f55 1185 location = location ? location : dev_name(vhost->dev);
072b91f9
BK		 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1187}
1188
1189/**
1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host
1191 * @vhost: ibmvfc host who owns the event pool
1192 *
1193 * Returns zero on success.
1194 **/
1195static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost)
1196{
1197 int i;
1198 struct ibmvfc_event_pool *pool = &vhost->pool;
1199
1200 ENTER;
1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL);
1203 if (!pool->events)
1204 return -ENOMEM;
1205
1206 pool->iu_storage = dma_alloc_coherent(vhost->dev,
1207 pool->size * sizeof(*pool->iu_storage),
1208 &pool->iu_token, 0);
1209
1210 if (!pool->iu_storage) {
1211 kfree(pool->events);
1212 return -ENOMEM;
1213 }
1214
1215 for (i = 0; i < pool->size; ++i) {
1216 struct ibmvfc_event *evt = &pool->events[i];
1217 atomic_set(&evt->free, 1);
1218 evt->crq.valid = 0x80;
0aab6c3f 1219 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
072b91f9
BK		 1220 evt->xfer_iu = pool->iu_storage + i;
1221 evt->vhost = vhost;
1222 evt->ext_list = NULL;
1223 list_add_tail(&evt->queue, &vhost->free);
1224 }
1225
1226 LEAVE;
1227 return 0;
1228}
1229
1230/**
1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host
1232 * @vhost: ibmvfc host who owns the event pool
1233 *
1234 **/
1235static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost)
1236{
1237 int i;
1238 struct ibmvfc_event_pool *pool = &vhost->pool;
1239
1240 ENTER;
1241 for (i = 0; i < pool->size; ++i) {
1242 list_del(&pool->events[i].queue);
1243 BUG_ON(atomic_read(&pool->events[i].free) != 1);
1244 if (pool->events[i].ext_list)
1245 dma_pool_free(vhost->sg_pool,
1246 pool->events[i].ext_list,
1247 pool->events[i].ext_list_token);
1248 }
1249
1250 kfree(pool->events);
1251 dma_free_coherent(vhost->dev,
1252 pool->size * sizeof(*pool->iu_storage),
1253 pool->iu_storage, pool->iu_token);
1254 LEAVE;
1255}
1256
1257/**
1258 * ibmvfc_get_event - Gets the next free event in pool
1259 * @vhost: ibmvfc host struct
1260 *
1261 * Returns a free event from the pool.
1262 **/
1263static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost)
1264{
1265 struct ibmvfc_event *evt;
1266
1267 BUG_ON(list_empty(&vhost->free));
1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue);
1269 atomic_set(&evt->free, 0);
1270 list_del(&evt->queue);
1271 return evt;
1272}
1273
1274/**
1275 * ibmvfc_init_event - Initialize fields in an event struct that are always
1276 * required.
1277 * @evt: The event
1278 * @done: Routine to call when the event is responded to
1279 * @format: SRP or MAD format
1280 **/
1281static void ibmvfc_init_event(struct ibmvfc_event *evt,
1282 void (*done) (struct ibmvfc_event *), u8 format)
1283{
1284 evt->cmnd = NULL;
1285 evt->sync_iu = NULL;
1286 evt->crq.format = format;
1287 evt->done = done;
ad8dcffa 1288 evt->eh_comp = NULL;
072b91f9
BK		 1289}
1290
1291/**
1292 * ibmvfc_map_sg_list - Initialize scatterlist
1293 * @scmd: scsi command struct
1294 * @nseg: number of scatterlist segments
1295 * @md: memory descriptor list to initialize
1296 **/
1297static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1298 struct srp_direct_buf *md)
1299{
1300 int i;
1301 struct scatterlist *sg;
1302
1303 scsi_for_each_sg(scmd, sg, nseg, i) {
0aab6c3f
TD		 1304 md[i].va = cpu_to_be64(sg_dma_address(sg));
1305 md[i].len = cpu_to_be32(sg_dma_len(sg));
072b91f9
BK		 1306 md[i].key = 0;
1307 }
1308}
1309
1310/**
1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields
91ebc1fa 1312 * @scmd: struct scsi_cmnd with the scatterlist
072b91f9
BK		 1313 * @evt: ibmvfc event struct
1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor
1315 * @dev: device for which to map dma memory
1316 *
1317 * Returns:
1318 * 0 on success / non-zero on failure
1319 **/
1320static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1321 struct ibmvfc_event *evt,
1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1323{
1324
1325 int sg_mapped;
1326 struct srp_direct_buf *data = &vfc_cmd->ioba;
1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1328
a6104b1e
TD		 1329 if (cls3_error)
1330 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1331
072b91f9
BK		 1332 sg_mapped = scsi_dma_map(scmd);
1333 if (!sg_mapped) {
0aab6c3f 1334 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
072b91f9
BK		 1335 return 0;
1336 } else if (unlikely(sg_mapped < 0)) {
1337 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1338 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1339 return sg_mapped;
1340 }
1341
1342 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
0aab6c3f 1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
072b91f9
BK		 1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA;
1345 } else {
0aab6c3f 1346 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
072b91f9
BK		 1347 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA;
1348 }
1349
1350 if (sg_mapped == 1) {
1351 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1352 return 0;
1353 }
1354
0aab6c3f 1355 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
072b91f9
BK		 1356
1357 if (!evt->ext_list) {
1358 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1359 &evt->ext_list_token);
1360
1361 if (!evt->ext_list) {
64b840dd
BK		 1362 scsi_dma_unmap(scmd);
1363 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1364 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
072b91f9
BK		 1365 return -ENOMEM;
1366 }
1367 }
1368
1369 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1370
0aab6c3f
TD		 1371 data->va = cpu_to_be64(evt->ext_list_token);
1372 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
072b91f9
BK		 1373 data->key = 0;
1374 return 0;
1375}
1376
1377/**
1378 * ibmvfc_timeout - Internal command timeout handler
1379 * @evt: struct ibmvfc_event that timed out
1380 *
1381 * Called when an internally generated command times out
1382 **/
9a5d04fc 1383static void ibmvfc_timeout(struct timer_list *t)
072b91f9 1384{
9a5d04fc 1385 struct ibmvfc_event *evt = from_timer(evt, t, timer);
072b91f9
BK		 1386 struct ibmvfc_host *vhost = evt->vhost;
1387 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1388 ibmvfc_reset_host(vhost);
1389}
1390
1391/**
1392 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq()
1393 * @evt: event to be sent
1394 * @vhost: ibmvfc host struct
1395 * @timeout: timeout in seconds - 0 means do not time command
1396 *
1397 * Returns the value returned from ibmvfc_send_crq(). (Zero for success)
1398 **/
1399static int ibmvfc_send_event(struct ibmvfc_event *evt,
1400 struct ibmvfc_host *vhost, unsigned long timeout)
1401{
0aab6c3f 1402 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
072b91f9
BK		 1403 int rc;
1404
1405 /* Copy the IU into the transfer area */
1406 *evt->xfer_iu = evt->iu;
1407 if (evt->crq.format == IBMVFC_CMD_FORMAT)
0aab6c3f 1408 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
072b91f9 1409 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
0aab6c3f 1410 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
072b91f9
BK		 1411 else
1412 BUG();
1413
1414 list_add_tail(&evt->queue, &vhost->sent);
9a5d04fc 1415 timer_setup(&evt->timer, ibmvfc_timeout, 0);
072b91f9
BK		 1416
1417 if (timeout) {
072b91f9 1418 evt->timer.expires = jiffies + (timeout * HZ);
072b91f9
BK		 1419 add_timer(&evt->timer);
1420 }
1421
a528ab7a
BK		 1422 mb();
1423
0aab6c3f
TD		 1424 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1425 be64_to_cpu(crq_as_u64[1])))) {
072b91f9
BK		 1426 list_del(&evt->queue);
1427 del_timer(&evt->timer);
1428
1429 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
1430 * Firmware will send a CRQ with a transport event (0xFF) to
1431 * tell this client what has happened to the transport. This
1432 * will be handled in ibmvfc_handle_crq()
1433 */
1434 if (rc == H_CLOSED) {
1435 if (printk_ratelimit())
1436 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1437 if (evt->cmnd)
1438 scsi_dma_unmap(evt->cmnd);
1439 ibmvfc_free_event(evt);
1440 return SCSI_MLQUEUE_HOST_BUSY;
1441 }
1442
1443 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1444 if (evt->cmnd) {
1445 evt->cmnd->result = DID_ERROR << 16;
1446 evt->done = ibmvfc_scsi_eh_done;
1447 } else
0aab6c3f 1448 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
072b91f9
BK		 1449
1450 evt->done(evt);
1451 } else
1452 ibmvfc_trc_start(evt);
1453
1454 return 0;
1455}
1456
1457/**
1458 * ibmvfc_log_error - Log an error for the failed command if appropriate
1459 * @evt: ibmvfc event to log
1460 *
1461 **/
1462static void ibmvfc_log_error(struct ibmvfc_event *evt)
1463{
1464 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1465 struct ibmvfc_host *vhost = evt->vhost;
1466 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1467 struct scsi_cmnd *cmnd = evt->cmnd;
1468 const char *err = unknown_error;
0aab6c3f 1469 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
072b91f9
BK		 1470 int logerr = 0;
1471 int rsp_code = 0;
1472
1473 if (index >= 0) {
1474 logerr = cmd_status[index].log;
1475 err = cmd_status[index].name;
1476 }
1477
0ae808e0 1478 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
072b91f9
BK		 1479 return;
1480
1481 if (rsp->flags & FCP_RSP_LEN_VALID)
1482 rsp_code = rsp->data.info.rsp_code;
1483
6dc6a944 1484 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
072b91f9 1485 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
3e6f7de4 1486 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error),
072b91f9
BK		 1487 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1488}
1489
6d29cc56
BK		 1490/**
1491 * ibmvfc_relogin - Log back into the specified device
1492 * @sdev: scsi device struct
1493 *
1494 **/
1495static void ibmvfc_relogin(struct scsi_device *sdev)
1496{
1497 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1498 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1499 struct ibmvfc_target *tgt;
1500
1501 list_for_each_entry(tgt, &vhost->targets, queue) {
1502 if (rport == tgt->rport) {
1503 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
1504 break;
1505 }
1506 }
1507
1508 ibmvfc_reinit_host(vhost);
1509}
1510
072b91f9
BK		 1511/**
1512 * ibmvfc_scsi_done - Handle responses from commands
1513 * @evt: ibmvfc event to be handled
1514 *
1515 * Used as a callback when sending scsi cmds.
1516 **/
1517static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1518{
1519 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1520 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp;
1521 struct scsi_cmnd *cmnd = evt->cmnd;
2bac406d 1522 u32 rsp_len = 0;
0aab6c3f 1523 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
072b91f9
BK		 1524
1525 if (cmnd) {
0aab6c3f
TD		 1526 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1527 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
072b91f9 1528 else if (rsp->flags & FCP_RESID_UNDER)
0aab6c3f 1529 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
072b91f9
BK		 1530 else
1531 scsi_set_resid(cmnd, 0);
1532
1533 if (vfc_cmd->status) {
1534 cmnd->result = ibmvfc_get_err_result(vfc_cmd);
1535
1536 if (rsp->flags & FCP_RSP_LEN_VALID)
0aab6c3f 1537 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
072b91f9
BK		 1538 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1539 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
2bac406d 1540 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
072b91f9 1541 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
0aab6c3f
TD		 1542 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1543 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
6d29cc56 1544 ibmvfc_relogin(cmnd->device);
072b91f9 1545
50119dad
BK		 1546 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1547 cmnd->result = (DID_ERROR << 16);
1548
072b91f9
BK		 1549 ibmvfc_log_error(evt);
1550 }
1551
1552 if (!cmnd->result &&
1553 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1554 cmnd->result = (DID_ERROR << 16);
1555
1556 scsi_dma_unmap(cmnd);
1557 cmnd->scsi_done(cmnd);
1558 }
1559
ad8dcffa
BK		 1560 if (evt->eh_comp)
1561 complete(evt->eh_comp);
1562
072b91f9
BK		 1563 ibmvfc_free_event(evt);
1564}
1565
1566/**
1567 * ibmvfc_host_chkready - Check if the host can accept commands
1568 * @vhost: struct ibmvfc host
1569 *
1570 * Returns:
1571 * 1 if host can accept command / 0 if not
1572 **/
1573static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1574{
1575 int result = 0;
1576
1577 switch (vhost->state) {
1578 case IBMVFC_LINK_DEAD:
1579 case IBMVFC_HOST_OFFLINE:
1580 result = DID_NO_CONNECT << 16;
1581 break;
1582 case IBMVFC_NO_CRQ:
1583 case IBMVFC_INITIALIZING:
1584 case IBMVFC_HALTED:
1585 case IBMVFC_LINK_DOWN:
1586 result = DID_REQUEUE << 16;
1587 break;
1588 case IBMVFC_ACTIVE:
1589 result = 0;
1590 break;
f36cfe6a 1591 }
072b91f9
BK		 1592
1593 return result;
1594}
1595
1596/**
1597 * ibmvfc_queuecommand - The queuecommand function of the scsi template
1598 * @cmnd: struct scsi_cmnd to be executed
1599 * @done: Callback function to be called when cmnd is completed
1600 *
1601 * Returns:
1602 * 0 on success / other on failure
1603 **/
f281233d 1604static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
072b91f9
BK		 1605 void (*done) (struct scsi_cmnd *))
1606{
1607 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host);
1608 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1609 struct ibmvfc_cmd *vfc_cmd;
1610 struct ibmvfc_event *evt;
072b91f9
BK		 1611 int rc;
1612
1613 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1614 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1615 cmnd->result = rc;
1616 done(cmnd);
1617 return 0;
1618 }
1619
1620 cmnd->result = (DID_OK << 16);
1621 evt = ibmvfc_get_event(vhost);
1622 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1623 evt->cmnd = cmnd;
1624 cmnd->scsi_done = done;
1625 vfc_cmd = &evt->iu.cmd;
1626 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
0aab6c3f
TD		 1627 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1628 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1629 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1630 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu));
1631 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp));
1632 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata);
1633 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1634 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
072b91f9
BK		 1635 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun);
1636 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len);
1637
50668633
CH		 1638 if (cmnd->flags & SCMD_TAGGED) {
1639 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1640 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
072b91f9
BK		 1641 }
1642
1643 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1644 return ibmvfc_send_event(evt, vhost, 0);
1645
1646 ibmvfc_free_event(evt);
1647 if (rc == -ENOMEM)
1648 return SCSI_MLQUEUE_HOST_BUSY;
1649
1650 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1651 scmd_printk(KERN_ERR, cmnd,
1652 "Failed to map DMA buffer for command. rc=%d\n", rc);
1653
1654 cmnd->result = DID_ERROR << 16;
1655 done(cmnd);
1656 return 0;
1657}
1658
f281233d
JG		 1659static DEF_SCSI_QCMD(ibmvfc_queuecommand)
1660
072b91f9
BK		 1661/**
1662 * ibmvfc_sync_completion - Signal that a synchronous command has completed
1663 * @evt: ibmvfc event struct
1664 *
1665 **/
1666static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1667{
1668 /* copy the response back */
1669 if (evt->sync_iu)
1670 *evt->sync_iu = *evt->xfer_iu;
1671
1672 complete(&evt->comp);
1673}
1674
d31429e1
BK		 1675/**
1676 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
1677 * @evt: struct ibmvfc_event
1678 *
1679 **/
1680static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
1681{
1682 struct ibmvfc_host *vhost = evt->vhost;
1683
1684 ibmvfc_free_event(evt);
1685 vhost->aborting_passthru = 0;
1686 dev_info(vhost->dev, "Passthru command cancelled\n");
1687}
1688
1689/**
1690 * ibmvfc_bsg_timeout - Handle a BSG timeout
75cc8cfc 1691 * @job: struct bsg_job that timed out
d31429e1
BK		 1692 *
1693 * Returns:
1694 * 0 on success / other on failure
1695 **/
75cc8cfc 1696static int ibmvfc_bsg_timeout(struct bsg_job *job)
d31429e1 1697{
cd21c605 1698 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
d31429e1
BK		 1699 unsigned long port_id = (unsigned long)job->dd_data;
1700 struct ibmvfc_event *evt;
1701 struct ibmvfc_tmf *tmf;
1702 unsigned long flags;
1703 int rc;
1704
1705 ENTER;
1706 spin_lock_irqsave(vhost->host->host_lock, flags);
1707 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
1708 __ibmvfc_reset_host(vhost);
1709 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1710 return 0;
1711 }
1712
1713 vhost->aborting_passthru = 1;
1714 evt = ibmvfc_get_event(vhost);
1715 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
1716
1717 tmf = &evt->iu.tmf;
1718 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1719 tmf->common.version = cpu_to_be32(1);
1720 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
1721 tmf->common.length = cpu_to_be16(sizeof(*tmf));
1722 tmf->scsi_id = cpu_to_be64(port_id);
1723 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1724 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
d31429e1
BK		 1725 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1726
1727 if (rc != 0) {
1728 vhost->aborting_passthru = 0;
1729 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
1730 rc = -EIO;
1731 } else
1732 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
1733 port_id);
1734
1735 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1736
1737 LEAVE;
1738 return rc;
1739}
1740
1741/**
1742 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
1743 * @vhost: struct ibmvfc_host to send command
1744 * @port_id: port ID to send command
1745 *
1746 * Returns:
1747 * 0 on success / other on failure
1748 **/
1749static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
1750{
1751 struct ibmvfc_port_login *plogi;
1752 struct ibmvfc_target *tgt;
1753 struct ibmvfc_event *evt;
1754 union ibmvfc_iu rsp_iu;
1755 unsigned long flags;
1756 int rc = 0, issue_login = 1;
1757
1758 ENTER;
1759 spin_lock_irqsave(vhost->host->host_lock, flags);
1760 list_for_each_entry(tgt, &vhost->targets, queue) {
1761 if (tgt->scsi_id == port_id) {
1762 issue_login = 0;
1763 break;
1764 }
1765 }
1766
1767 if (!issue_login)
1768 goto unlock_out;
1769 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
1770 goto unlock_out;
1771
1772 evt = ibmvfc_get_event(vhost);
1773 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1774 plogi = &evt->iu.plogi;
1775 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 1776 plogi->common.version = cpu_to_be32(1);
1777 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
1778 plogi->common.length = cpu_to_be16(sizeof(*plogi));
1779 plogi->scsi_id = cpu_to_be64(port_id);
d31429e1
BK		 1780 evt->sync_iu = &rsp_iu;
1781 init_completion(&evt->comp);
1782
1783 rc = ibmvfc_send_event(evt, vhost, default_timeout);
1784 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1785
1786 if (rc)
1787 return -EIO;
1788
1789 wait_for_completion(&evt->comp);
1790
1791 if (rsp_iu.plogi.common.status)
1792 rc = -EIO;
1793
1794 spin_lock_irqsave(vhost->host->host_lock, flags);
1795 ibmvfc_free_event(evt);
1796unlock_out:
1797 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1798 LEAVE;
1799 return rc;
1800}
1801
1802/**
1803 * ibmvfc_bsg_request - Handle a BSG request
75cc8cfc 1804 * @job: struct bsg_job to be executed
d31429e1
BK		 1805 *
1806 * Returns:
1807 * 0 on success / other on failure
1808 **/
75cc8cfc 1809static int ibmvfc_bsg_request(struct bsg_job *job)
d31429e1 1810{
cd21c605 1811 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
1d69b122 1812 struct fc_rport *rport = fc_bsg_to_rport(job);
d31429e1
BK		 1813 struct ibmvfc_passthru_mad *mad;
1814 struct ibmvfc_event *evt;
1815 union ibmvfc_iu rsp_iu;
1816 unsigned long flags, port_id = -1;
01e0e15c
JT		 1817 struct fc_bsg_request *bsg_request = job->request;
1818 struct fc_bsg_reply *bsg_reply = job->reply;
1819 unsigned int code = bsg_request->msgcode;
d31429e1
BK		 1820 int rc = 0, req_seg, rsp_seg, issue_login = 0;
1821 u32 fc_flags, rsp_len;
1822
1823 ENTER;
01e0e15c 1824 bsg_reply->reply_payload_rcv_len = 0;
d31429e1
BK		 1825 if (rport)
1826 port_id = rport->port_id;
1827
1828 switch (code) {
1829 case FC_BSG_HST_ELS_NOLOGIN:
01e0e15c
JT		 1830 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
1831 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
1832 bsg_request->rqst_data.h_els.port_id[2];
d31429e1
BK		 1833 case FC_BSG_RPT_ELS:
1834 fc_flags = IBMVFC_FC_ELS;
1835 break;
1836 case FC_BSG_HST_CT:
1837 issue_login = 1;
01e0e15c
JT		 1838 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
1839 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
1840 bsg_request->rqst_data.h_ct.port_id[2];
d31429e1
BK		 1841 case FC_BSG_RPT_CT:
1842 fc_flags = IBMVFC_FC_CT_IU;
1843 break;
1844 default:
1845 return -ENOTSUPP;
f36cfe6a 1846 }
d31429e1
BK		 1847
1848 if (port_id == -1)
1849 return -EINVAL;
1850 if (!mutex_trylock(&vhost->passthru_mutex))
1851 return -EBUSY;
1852
1853 job->dd_data = (void *)port_id;
1854 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
1855 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1856
1857 if (!req_seg) {
1858 mutex_unlock(&vhost->passthru_mutex);
1859 return -ENOMEM;
1860 }
1861
1862 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
1863 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1864
1865 if (!rsp_seg) {
1866 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1867 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1868 mutex_unlock(&vhost->passthru_mutex);
1869 return -ENOMEM;
1870 }
1871
1872 if (req_seg > 1 || rsp_seg > 1) {
1873 rc = -EINVAL;
1874 goto out;
1875 }
1876
1877 if (issue_login)
1878 rc = ibmvfc_bsg_plogi(vhost, port_id);
1879
1880 spin_lock_irqsave(vhost->host->host_lock, flags);
1881
1882 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
1883 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1884 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1885 goto out;
1886 }
1887
1888 evt = ibmvfc_get_event(vhost);
1889 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
1890 mad = &evt->iu.passthru;
1891
1892 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 1893 mad->common.version = cpu_to_be32(1);
1894 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
1895 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
1896
1897 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
1898 offsetof(struct ibmvfc_passthru_mad, iu));
1899 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
1900
1901 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
1902 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
1903 mad->iu.flags = cpu_to_be32(fc_flags);
1904 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
1905
1906 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
1907 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
1908 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
1909 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
1910 mad->iu.scsi_id = cpu_to_be64(port_id);
1911 mad->iu.tag = cpu_to_be64((u64)evt);
1912 rsp_len = be32_to_cpu(mad->iu.rsp.len);
d31429e1
BK		 1913
1914 evt->sync_iu = &rsp_iu;
1915 init_completion(&evt->comp);
1916 rc = ibmvfc_send_event(evt, vhost, 0);
1917 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1918
1919 if (rc) {
1920 rc = -EIO;
1921 goto out;
1922 }
1923
1924 wait_for_completion(&evt->comp);
1925
1926 if (rsp_iu.passthru.common.status)
1927 rc = -EIO;
1928 else
01e0e15c 1929 bsg_reply->reply_payload_rcv_len = rsp_len;
d31429e1
BK		 1930
1931 spin_lock_irqsave(vhost->host->host_lock, flags);
1932 ibmvfc_free_event(evt);
1933 spin_unlock_irqrestore(vhost->host->host_lock, flags);
01e0e15c 1934 bsg_reply->result = rc;
06548160 1935 bsg_job_done(job, bsg_reply->result,
1abaede7 1936 bsg_reply->reply_payload_rcv_len);
d31429e1
BK		 1937 rc = 0;
1938out:
1939 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
1940 job->request_payload.sg_cnt, DMA_TO_DEVICE);
1941 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
1942 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
1943 mutex_unlock(&vhost->passthru_mutex);
1944 LEAVE;
1945 return rc;
1946}
1947
072b91f9
BK		 1948/**
1949 * ibmvfc_reset_device - Reset the device with the specified reset type
1950 * @sdev: scsi device to reset
1951 * @type: reset type
1952 * @desc: reset type description for log messages
1953 *
1954 * Returns:
1955 * 0 on success / other on failure
1956 **/
1957static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
1958{
1959 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1960 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1961 struct ibmvfc_cmd *tmf;
50ed9a00 1962 struct ibmvfc_event *evt = NULL;
072b91f9
BK		 1963 union ibmvfc_iu rsp_iu;
1964 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
1965 int rsp_rc = -EBUSY;
1966 unsigned long flags;
1967 int rsp_code = 0;
1968
1969 spin_lock_irqsave(vhost->host->host_lock, flags);
1970 if (vhost->state == IBMVFC_ACTIVE) {
1971 evt = ibmvfc_get_event(vhost);
1972 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
1973
1974 tmf = &evt->iu.cmd;
1975 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 1976 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
1977 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
1978 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1979 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
1980 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
1981 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1982 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
072b91f9 1983 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 1984 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
072b91f9
BK		 1985 tmf->iu.tmf_flags = type;
1986 evt->sync_iu = &rsp_iu;
1987
1988 init_completion(&evt->comp);
1989 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
1990 }
1991 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1992
1993 if (rsp_rc != 0) {
1994 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
1995 desc, rsp_rc);
1996 return -EIO;
1997 }
1998
1999 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2000 wait_for_completion(&evt->comp);
2001
230934a6
BK		 2002 if (rsp_iu.cmd.status)
2003 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2004
2005 if (rsp_code) {
072b91f9
BK		 2006 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2007 rsp_code = fc_rsp->data.info.rsp_code;
2008
2009 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
0aab6c3f
TD		 2010 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2011 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
3e6f7de4 2012 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
072b91f9
BK		 2013 fc_rsp->scsi_status);
2014 rsp_rc = -EIO;
2015 } else
2016 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2017
2018 spin_lock_irqsave(vhost->host->host_lock, flags);
2019 ibmvfc_free_event(evt);
2020 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2021 return rsp_rc;
2022}
2023
2024/**
d2fab5cf
BK		 2025 * ibmvfc_match_rport - Match function for specified remote port
2026 * @evt: ibmvfc event struct
2027 * @device: device to match (rport)
072b91f9
BK		 2028 *
2029 * Returns:
d2fab5cf 2030 * 1 if event matches rport / 0 if event does not match rport
072b91f9 2031 **/
d2fab5cf 2032static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
072b91f9 2033{
d2fab5cf 2034 struct fc_rport *cmd_rport;
072b91f9 2035
d2fab5cf
BK		 2036 if (evt->cmnd) {
2037 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2038 if (cmd_rport == rport)
2039 return 1;
072b91f9 2040 }
d2fab5cf
BK		 2041 return 0;
2042}
072b91f9 2043
d2fab5cf
BK		 2044/**
2045 * ibmvfc_match_target - Match function for specified target
2046 * @evt: ibmvfc event struct
2047 * @device: device to match (starget)
2048 *
2049 * Returns:
2050 * 1 if event matches starget / 0 if event does not match starget
2051 **/
2052static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2053{
2054 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2055 return 1;
2056 return 0;
2057}
072b91f9 2058
d2fab5cf
BK		 2059/**
2060 * ibmvfc_match_lun - Match function for specified LUN
2061 * @evt: ibmvfc event struct
2062 * @device: device to match (sdev)
2063 *
2064 * Returns:
2065 * 1 if event matches sdev / 0 if event does not match sdev
2066 **/
2067static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2068{
2069 if (evt->cmnd && evt->cmnd->device == device)
2070 return 1;
2071 return 0;
2072}
072b91f9 2073
d2fab5cf
BK		 2074/**
2075 * ibmvfc_wait_for_ops - Wait for ops to complete
2076 * @vhost: ibmvfc host struct
2077 * @device: device to match (starget or sdev)
2078 * @match: match function
2079 *
2080 * Returns:
2081 * SUCCESS / FAILED
2082 **/
2083static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2084 int (*match) (struct ibmvfc_event *, void *))
2085{
2086 struct ibmvfc_event *evt;
2087 DECLARE_COMPLETION_ONSTACK(comp);
2088 int wait;
2089 unsigned long flags;
2090 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
072b91f9 2091
d2fab5cf
BK		 2092 ENTER;
2093 do {
2094 wait = 0;
2095 spin_lock_irqsave(vhost->host->host_lock, flags);
2096 list_for_each_entry(evt, &vhost->sent, queue) {
2097 if (match(evt, device)) {
2098 evt->eh_comp = &comp;
2099 wait++;
2100 }
2101 }
2102 spin_unlock_irqrestore(vhost->host->host_lock, flags);
230934a6 2103
d2fab5cf
BK		 2104 if (wait) {
2105 timeout = wait_for_completion_timeout(&comp, timeout);
072b91f9 2106
d2fab5cf
BK		 2107 if (!timeout) {
2108 wait = 0;
2109 spin_lock_irqsave(vhost->host->host_lock, flags);
2110 list_for_each_entry(evt, &vhost->sent, queue) {
2111 if (match(evt, device)) {
2112 evt->eh_comp = NULL;
2113 wait++;
2114 }
2115 }
2116 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2117 if (wait)
2118 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2119 LEAVE;
2120 return wait ? FAILED : SUCCESS;
2121 }
2122 }
2123 } while (wait);
072b91f9 2124
d2fab5cf
BK		 2125 LEAVE;
2126 return SUCCESS;
072b91f9
BK		 2127}
2128
2129/**
2130 * ibmvfc_cancel_all - Cancel all outstanding commands to the device
2131 * @sdev: scsi device to cancel commands
2132 * @type: type of error recovery being performed
2133 *
2134 * This sends a cancel to the VIOS for the specified device. This does
2135 * NOT send any abort to the actual device. That must be done separately.
2136 *
2137 * Returns:
2138 * 0 on success / other on failure
2139 **/
2140static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2141{
2142 struct ibmvfc_host *vhost = shost_priv(sdev->host);
ad8dcffa
BK		 2143 struct scsi_target *starget = scsi_target(sdev);
2144 struct fc_rport *rport = starget_to_rport(starget);
072b91f9
BK		 2145 struct ibmvfc_tmf *tmf;
2146 struct ibmvfc_event *evt, *found_evt;
2147 union ibmvfc_iu rsp;
2148 int rsp_rc = -EBUSY;
2149 unsigned long flags;
2150 u16 status;
2151
2152 ENTER;
2153 spin_lock_irqsave(vhost->host->host_lock, flags);
2154 found_evt = NULL;
2155 list_for_each_entry(evt, &vhost->sent, queue) {
2156 if (evt->cmnd && evt->cmnd->device == sdev) {
2157 found_evt = evt;
2158 break;
2159 }
2160 }
2161
2162 if (!found_evt) {
2163 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2164 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2165 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2166 return 0;
2167 }
2168
55d29bf0 2169 if (vhost->logged_in) {
072b91f9
BK		 2170 evt = ibmvfc_get_event(vhost);
2171 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2172
2173 tmf = &evt->iu.tmf;
2174 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2175 tmf->common.version = cpu_to_be32(1);
2176 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2177 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2178 tmf->scsi_id = cpu_to_be64(rport->port_id);
072b91f9 2179 int_to_scsilun(sdev->lun, &tmf->lun);
0aab6c3f 2180 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS))
90f725db 2181 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
55d29bf0 2182 if (vhost->state == IBMVFC_ACTIVE)
0aab6c3f 2183 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
55d29bf0 2184 else
0aab6c3f
TD		 2185 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2186 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2187 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
072b91f9
BK		 2188
2189 evt->sync_iu = &rsp;
2190 init_completion(&evt->comp);
2191 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2192 }
2193
2194 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2195
2196 if (rsp_rc != 0) {
2197 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
c281e32a
BK		 2198 /* If failure is received, the host adapter is most likely going
2199 through reset, return success so the caller will wait for the command
2200 being cancelled to get returned */
2201 return 0;
072b91f9
BK		 2202 }
2203
2204 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2205
2206 wait_for_completion(&evt->comp);
0aab6c3f 2207 status = be16_to_cpu(rsp.mad_common.status);
072b91f9
BK		 2208 spin_lock_irqsave(vhost->host->host_lock, flags);
2209 ibmvfc_free_event(evt);
2210 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2211
2212 if (status != IBMVFC_MAD_SUCCESS) {
2213 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
c281e32a
BK		 2214 switch (status) {
2215 case IBMVFC_MAD_DRIVER_FAILED:
2216 case IBMVFC_MAD_CRQ_ERROR:
2217 /* Host adapter most likely going through reset, return success to
2218 the caller will wait for the command being cancelled to get returned */
2219 return 0;
2220 default:
2221 return -EIO;
2222 };
072b91f9
BK		 2223 }
2224
2225 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2226 return 0;
2227}
2228
ad8dcffa 2229/**
d2fab5cf 2230 * ibmvfc_match_key - Match function for specified cancel key
ad8dcffa 2231 * @evt: ibmvfc event struct
d2fab5cf 2232 * @key: cancel key to match
ad8dcffa
BK		 2233 *
2234 * Returns:
d2fab5cf 2235 * 1 if event matches key / 0 if event does not match key
ad8dcffa 2236 **/
d2fab5cf 2237static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
ad8dcffa 2238{
d2fab5cf 2239 unsigned long cancel_key = (unsigned long)key;
ad8dcffa 2240
d2fab5cf 2241 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
0aab6c3f 2242 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
ad8dcffa
BK		 2243 return 1;
2244 return 0;
2245}
2246
a077c7fa
BK		 2247/**
2248 * ibmvfc_match_evt - Match function for specified event
2249 * @evt: ibmvfc event struct
2250 * @match: event to match
2251 *
2252 * Returns:
2253 * 1 if event matches key / 0 if event does not match key
2254 **/
2255static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2256{
2257 if (evt == match)
2258 return 1;
2259 return 0;
2260}
2261
ad8dcffa 2262/**
d2fab5cf
BK		 2263 * ibmvfc_abort_task_set - Abort outstanding commands to the device
2264 * @sdev: scsi device to abort commands
2265 *
2266 * This sends an Abort Task Set to the VIOS for the specified device. This does
2267 * NOT send any cancel to the VIOS. That must be done separately.
ad8dcffa
BK		 2268 *
2269 * Returns:
d2fab5cf 2270 * 0 on success / other on failure
ad8dcffa 2271 **/
d2fab5cf 2272static int ibmvfc_abort_task_set(struct scsi_device *sdev)
ad8dcffa 2273{
d2fab5cf
BK		 2274 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2275 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2276 struct ibmvfc_cmd *tmf;
2277 struct ibmvfc_event *evt, *found_evt;
2278 union ibmvfc_iu rsp_iu;
2279 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
2280 int rc, rsp_rc = -EBUSY;
2281 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2282 int rsp_code = 0;
ad8dcffa 2283
d2fab5cf
BK		 2284 spin_lock_irqsave(vhost->host->host_lock, flags);
2285 found_evt = NULL;
2286 list_for_each_entry(evt, &vhost->sent, queue) {
2287 if (evt->cmnd && evt->cmnd->device == sdev) {
2288 found_evt = evt;
2289 break;
ad8dcffa 2290 }
d2fab5cf
BK		 2291 }
2292
2293 if (!found_evt) {
2294 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2295 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
ad8dcffa 2296 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2fab5cf
BK		 2297 return 0;
2298 }
ad8dcffa 2299
d2fab5cf
BK		 2300 if (vhost->state == IBMVFC_ACTIVE) {
2301 evt = ibmvfc_get_event(vhost);
2302 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
ad8dcffa 2303
d2fab5cf
BK		 2304 tmf = &evt->iu.cmd;
2305 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 2306 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp));
2307 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp));
2308 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
2309 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu));
2310 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp));
2311 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2312 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id);
d2fab5cf 2313 int_to_scsilun(sdev->lun, &tmf->iu.lun);
0aab6c3f 2314 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
d2fab5cf
BK		 2315 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
2316 evt->sync_iu = &rsp_iu;
2317
2318 init_completion(&evt->comp);
2319 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2320 }
2321
2322 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2323
2324 if (rsp_rc != 0) {
2325 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2326 return -EIO;
2327 }
2328
2329 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2330 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2331
2332 if (!timeout) {
f8804b72 2333 rc = ibmvfc_cancel_all(sdev, 0);
d2fab5cf
BK		 2334 if (!rc) {
2335 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2336 if (rc == SUCCESS)
2337 rc = 0;
ad8dcffa 2338 }
ad8dcffa 2339
d2fab5cf
BK		 2340 if (rc) {
2341 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2342 ibmvfc_reset_host(vhost);
a077c7fa
BK		 2343 rsp_rc = -EIO;
2344 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2345
2346 if (rc == SUCCESS)
2347 rsp_rc = 0;
2348
2349 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2350 if (rc != SUCCESS) {
2351 spin_lock_irqsave(vhost->host->host_lock, flags);
2352 ibmvfc_hard_reset_host(vhost);
2353 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2354 rsp_rc = 0;
2355 }
2356
d2fab5cf
BK		 2357 goto out;
2358 }
2359 }
2360
2361 if (rsp_iu.cmd.status)
2362 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
2363
2364 if (rsp_code) {
2365 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2366 rsp_code = fc_rsp->data.info.rsp_code;
2367
2368 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2369 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
0aab6c3f 2370 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
3e6f7de4 2371 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
d2fab5cf
BK		 2372 fc_rsp->scsi_status);
2373 rsp_rc = -EIO;
2374 } else
2375 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2376
2377out:
2378 spin_lock_irqsave(vhost->host->host_lock, flags);
2379 ibmvfc_free_event(evt);
2380 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2381 return rsp_rc;
ad8dcffa
BK		 2382}
2383
072b91f9
BK		 2384/**
2385 * ibmvfc_eh_abort_handler - Abort a command
2386 * @cmd: scsi command to abort
2387 *
2388 * Returns:
93631b4a 2389 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2390 **/
2391static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2392{
ad8dcffa
BK		 2393 struct scsi_device *sdev = cmd->device;
2394 struct ibmvfc_host *vhost = shost_priv(sdev->host);
55d29bf0 2395 int cancel_rc, block_rc;
ad8dcffa 2396 int rc = FAILED;
072b91f9
BK		 2397
2398 ENTER;
93631b4a 2399 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2400 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2401 if (block_rc != FAST_IO_FAIL) {
2402 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
55d29bf0 2403 ibmvfc_abort_task_set(sdev);
93631b4a 2404 } else
90f725db 2405 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2406
55d29bf0 2407 if (!cancel_rc)
ad8dcffa 2408 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2409
93631b4a
BK		 2410 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2411 rc = FAST_IO_FAIL;
2412
072b91f9 2413 LEAVE;
ad8dcffa 2414 return rc;
072b91f9
BK		 2415}
2416
2417/**
2418 * ibmvfc_eh_device_reset_handler - Reset a single LUN
2419 * @cmd: scsi command struct
2420 *
2421 * Returns:
93631b4a 2422 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2423 **/
2424static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2425{
ad8dcffa
BK		 2426 struct scsi_device *sdev = cmd->device;
2427 struct ibmvfc_host *vhost = shost_priv(sdev->host);
93631b4a 2428 int cancel_rc, block_rc, reset_rc = 0;
ad8dcffa 2429 int rc = FAILED;
072b91f9
BK		 2430
2431 ENTER;
93631b4a 2432 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2433 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2434 if (block_rc != FAST_IO_FAIL) {
2435 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2436 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2437 } else
90f725db 2438 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
072b91f9 2439
ad8dcffa
BK		 2440 if (!cancel_rc && !reset_rc)
2441 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
072b91f9 2442
93631b4a
BK		 2443 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2444 rc = FAST_IO_FAIL;
2445
072b91f9 2446 LEAVE;
ad8dcffa 2447 return rc;
072b91f9
BK		 2448}
2449
93631b4a
BK		 2450/**
2451 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
2452 * @sdev: scsi device struct
2453 * @data: return code
2454 *
2455 **/
2456static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2457{
2458 unsigned long *rc = data;
90f725db 2459 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
93631b4a
BK		 2460}
2461
4a5c4a5e
BK		 2462/**
2463 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
2464 * @sdev: scsi device struct
2465 * @data: return code
2466 *
2467 **/
2468static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
072b91f9
BK		 2469{
2470 unsigned long *rc = data;
2471 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2472}
2473
072b91f9
BK		 2474/**
2475 * ibmvfc_eh_target_reset_handler - Reset the target
2476 * @cmd: scsi command struct
2477 *
2478 * Returns:
93631b4a 2479 * SUCCESS / FAST_IO_FAIL / FAILED
072b91f9
BK		 2480 **/
2481static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2482{
ad8dcffa
BK		 2483 struct scsi_device *sdev = cmd->device;
2484 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2485 struct scsi_target *starget = scsi_target(sdev);
93631b4a
BK		 2486 int block_rc;
2487 int reset_rc = 0;
ad8dcffa 2488 int rc = FAILED;
072b91f9 2489 unsigned long cancel_rc = 0;
072b91f9
BK		 2490
2491 ENTER;
93631b4a 2492 block_rc = fc_block_scsi_eh(cmd);
072b91f9 2493 ibmvfc_wait_while_resetting(vhost);
93631b4a
BK		 2494 if (block_rc != FAST_IO_FAIL) {
2495 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2496 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2497 } else
2498 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
072b91f9 2499
ad8dcffa
BK		 2500 if (!cancel_rc && !reset_rc)
2501 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
072b91f9 2502
93631b4a
BK		 2503 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2504 rc = FAST_IO_FAIL;
2505
072b91f9 2506 LEAVE;
ad8dcffa 2507 return rc;
072b91f9
BK		 2508}
2509
2510/**
2511 * ibmvfc_eh_host_reset_handler - Reset the connection to the server
2512 * @cmd: struct scsi_cmnd having problems
2513 *
2514 **/
2515static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2516{
8d8a3f59 2517 int rc;
072b91f9
BK		 2518 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2519
2520 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2521 rc = ibmvfc_issue_fc_host_lip(vhost->host);
93631b4a 2522
072b91f9
BK		 2523 return rc ? FAILED : SUCCESS;
2524}
2525
2526/**
2527 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport.
2528 * @rport: rport struct
2529 *
2530 * Return value:
2531 * none
2532 **/
2533static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2534{
d2fab5cf 2535 struct Scsi_Host *shost = rport_to_shost(rport);
072b91f9 2536 struct ibmvfc_host *vhost = shost_priv(shost);
d2fab5cf
BK		 2537 struct fc_rport *dev_rport;
2538 struct scsi_device *sdev;
2539 unsigned long rc;
072b91f9
BK		 2540
2541 ENTER;
d2fab5cf
BK		 2542 shost_for_each_device(sdev, shost) {
2543 dev_rport = starget_to_rport(scsi_target(sdev));
2544 if (dev_rport != rport)
2545 continue;
90f725db 2546 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
d2fab5cf 2547 }
072b91f9 2548
d2fab5cf 2549 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
ad8dcffa
BK		 2550
2551 if (rc == FAILED)
072b91f9 2552 ibmvfc_issue_fc_host_lip(shost);
072b91f9
BK		 2553 LEAVE;
2554}
2555
d99e5f48 2556static const struct ibmvfc_async_desc ae_desc [] = {
402c6eec
RJ		 2557 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2558 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2559 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2560 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2561 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
2562 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
2563 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
2564 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
2565 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
2566 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
2567 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
2568 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
2569 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
072b91f9
BK		 2570};
2571
d99e5f48 2572static const struct ibmvfc_async_desc unknown_ae = {
402c6eec 2573 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
d99e5f48 2574};
072b91f9
BK		 2575
2576/**
2577 * ibmvfc_get_ae_desc - Get text description for async event
2578 * @ae: async event
2579 *
2580 **/
d99e5f48 2581static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
072b91f9
BK		 2582{
2583 int i;
2584
2585 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
2586 if (ae_desc[i].ae == ae)
d99e5f48
BK		 2587 return &ae_desc[i];
2588
2589 return &unknown_ae;
2590}
2591
2592static const struct {
2593 enum ibmvfc_ae_link_state state;
2594 const char *desc;
2595} link_desc [] = {
2596 { IBMVFC_AE_LS_LINK_UP, " link up" },
2597 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
2598 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
2599 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
2600};
2601
2602/**
2603 * ibmvfc_get_link_state - Get text description for link state
2604 * @state: link state
2605 *
2606 **/
2607static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
2608{
2609 int i;
2610
2611 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
2612 if (link_desc[i].state == state)
2613 return link_desc[i].desc;
072b91f9 2614
d99e5f48 2615 return "";
072b91f9
BK		 2616}
2617
2618/**
2619 * ibmvfc_handle_async - Handle an async event from the adapter
2620 * @crq: crq to process
2621 * @vhost: ibmvfc host struct
2622 *
2623 **/
2624static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
2625 struct ibmvfc_host *vhost)
2626{
0aab6c3f 2627 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
6d29cc56 2628 struct ibmvfc_target *tgt;
072b91f9 2629
d99e5f48 2630 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
21367e20
TD		 2631 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
2632 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
d99e5f48 2633 ibmvfc_get_link_state(crq->link_state));
072b91f9 2634
0aab6c3f 2635 switch (be64_to_cpu(crq->event)) {
072b91f9 2636 case IBMVFC_AE_RESUME:
497f9c50
BK		 2637 switch (crq->link_state) {
2638 case IBMVFC_AE_LS_LINK_DOWN:
2639 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2640 break;
2641 case IBMVFC_AE_LS_LINK_DEAD:
2642 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2643 break;
2644 case IBMVFC_AE_LS_LINK_UP:
2645 case IBMVFC_AE_LS_LINK_BOUNCED:
2646 default:
2647 vhost->events_to_log |= IBMVFC_AE_LINKUP;
2648 vhost->delay_init = 1;
2649 __ibmvfc_reset_host(vhost);
2650 break;
f36cfe6a 2651 }
497f9c50
BK		 2652
2653 break;
2654 case IBMVFC_AE_LINK_UP:
072b91f9 2655 vhost->events_to_log |= IBMVFC_AE_LINKUP;
d2131b33
BK		 2656 vhost->delay_init = 1;
2657 __ibmvfc_reset_host(vhost);
072b91f9
BK		 2658 break;
2659 case IBMVFC_AE_SCN_FABRIC:
d2131b33 2660 case IBMVFC_AE_SCN_DOMAIN:
072b91f9 2661 vhost->events_to_log |= IBMVFC_AE_RSCN;
5cdf1626
BK		 2662 if (vhost->state < IBMVFC_HALTED) {
2663 vhost->delay_init = 1;
2664 __ibmvfc_reset_host(vhost);
2665 }
072b91f9
BK		 2666 break;
2667 case IBMVFC_AE_SCN_NPORT:
2668 case IBMVFC_AE_SCN_GROUP:
072b91f9 2669 vhost->events_to_log |= IBMVFC_AE_RSCN;
6d29cc56
BK		 2670 ibmvfc_reinit_host(vhost);
2671 break;
072b91f9
BK		 2672 case IBMVFC_AE_ELS_LOGO:
2673 case IBMVFC_AE_ELS_PRLO:
2674 case IBMVFC_AE_ELS_PLOGI:
6d29cc56
BK		 2675 list_for_each_entry(tgt, &vhost->targets, queue) {
2676 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
2677 break;
0aab6c3f 2678 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
6d29cc56 2679 continue;
0aab6c3f 2680 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
6d29cc56 2681 continue;
0aab6c3f 2682 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
6d29cc56 2683 continue;
0aab6c3f 2684 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
017b2ae3 2685 tgt->logo_rcvd = 1;
0aab6c3f 2686 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
017b2ae3
BK		 2687 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
2688 ibmvfc_reinit_host(vhost);
2689 }
6d29cc56 2690 }
072b91f9
BK		 2691 break;
2692 case IBMVFC_AE_LINK_DOWN:
2693 case IBMVFC_AE_ADAPTER_FAILED:
2694 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2695 break;
2696 case IBMVFC_AE_LINK_DEAD:
2697 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
2698 break;
2699 case IBMVFC_AE_HALT:
2700 ibmvfc_link_down(vhost, IBMVFC_HALTED);
2701 break;
2702 default:
775a42ec 2703 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
072b91f9 2704 break;
f36cfe6a 2705 }
072b91f9
BK		 2706}
2707
2708/**
2709 * ibmvfc_handle_crq - Handles and frees received events in the CRQ
2710 * @crq: Command/Response queue
2711 * @vhost: ibmvfc host struct
2712 *
2713 **/
2714static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
2715{
2716 long rc;
0aab6c3f 2717 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
072b91f9
BK		 2718
2719 switch (crq->valid) {
2720 case IBMVFC_CRQ_INIT_RSP:
2721 switch (crq->format) {
2722 case IBMVFC_CRQ_INIT:
2723 dev_info(vhost->dev, "Partner initialized\n");
2724 /* Send back a response */
2725 rc = ibmvfc_send_crq_init_complete(vhost);
2726 if (rc == 0)
861890c6 2727 ibmvfc_init_host(vhost);
072b91f9
BK		 2728 else
2729 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
2730 break;
2731 case IBMVFC_CRQ_INIT_COMPLETE:
2732 dev_info(vhost->dev, "Partner initialization complete\n");
861890c6 2733 ibmvfc_init_host(vhost);
072b91f9
BK		 2734 break;
2735 default:
2736 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
2737 }
2738 return;
2739 case IBMVFC_CRQ_XPORT_EVENT:
2740 vhost->state = IBMVFC_NO_CRQ;
79111d08 2741 vhost->logged_in = 0;
072b91f9
BK		 2742 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
2743 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
2744 /* We need to re-setup the interpartition connection */
d6e2635b 2745 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n");
072b91f9
BK		 2746 vhost->client_migrated = 1;
2747 ibmvfc_purge_requests(vhost, DID_REQUEUE);
73ee5d86
BK		 2748 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2749 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
d6e2635b
TD		 2750 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) {
2751 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format);
072b91f9 2752 ibmvfc_purge_requests(vhost, DID_ERROR);
73ee5d86
BK		 2753 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
2754 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
d6e2635b
TD		 2755 } else {
2756 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format);
072b91f9
BK		 2757 }
2758 return;
2759 case IBMVFC_CRQ_CMD_RSP:
2760 break;
2761 default:
2762 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
2763 return;
2764 }
2765
2766 if (crq->format == IBMVFC_ASYNC_EVENT)
2767 return;
2768
2769 /* The only kind of payload CRQs we should get are responses to
2770 * things we send. Make sure this response is to something we
2771 * actually sent
2772 */
2773 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) {
775a42ec 2774 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
072b91f9
BK		 2775 crq->ioba);
2776 return;
2777 }
2778
2779 if (unlikely(atomic_read(&evt->free))) {
775a42ec 2780 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
072b91f9
BK		 2781 crq->ioba);
2782 return;
2783 }
2784
2785 del_timer(&evt->timer);
2786 list_del(&evt->queue);
2787 ibmvfc_trc_end(evt);
2788 evt->done(evt);
2789}
2790
2791/**
2792 * ibmvfc_scan_finished - Check if the device scan is done.
2793 * @shost: scsi host struct
2794 * @time: current elapsed time
2795 *
2796 * Returns:
2797 * 0 if scan is not done / 1 if scan is done
2798 **/
2799static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
2800{
2801 unsigned long flags;
2802 struct ibmvfc_host *vhost = shost_priv(shost);
2803 int done = 0;
2804
2805 spin_lock_irqsave(shost->host_lock, flags);
2806 if (time >= (init_timeout * HZ)) {
2807 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
2808 "continuing initialization\n", init_timeout);
2809 done = 1;
2810 }
2811
43c8da90 2812 if (vhost->scan_complete)
072b91f9
BK		 2813 done = 1;
2814 spin_unlock_irqrestore(shost->host_lock, flags);
2815 return done;
2816}
2817
2818/**
2819 * ibmvfc_slave_alloc - Setup the device's task set value
2820 * @sdev: struct scsi_device device to configure
2821 *
2822 * Set the device's task set value so that error handling works as
2823 * expected.
2824 *
2825 * Returns:
2826 * 0 on success / -ENXIO if device does not exist
2827 **/
2828static int ibmvfc_slave_alloc(struct scsi_device *sdev)
2829{
2830 struct Scsi_Host *shost = sdev->host;
2831 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2832 struct ibmvfc_host *vhost = shost_priv(shost);
2833 unsigned long flags = 0;
2834
2835 if (!rport || fc_remote_port_chkready(rport))
2836 return -ENXIO;
2837
2838 spin_lock_irqsave(shost->host_lock, flags);
2839 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
2840 spin_unlock_irqrestore(shost->host_lock, flags);
2841 return 0;
2842}
2843
ad8dcffa
BK		 2844/**
2845 * ibmvfc_target_alloc - Setup the target's task set value
2846 * @starget: struct scsi_target
2847 *
2848 * Set the target's task set value so that error handling works as
2849 * expected.
2850 *
2851 * Returns:
2852 * 0 on success / -ENXIO if device does not exist
2853 **/
2854static int ibmvfc_target_alloc(struct scsi_target *starget)
2855{
2856 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2857 struct ibmvfc_host *vhost = shost_priv(shost);
2858 unsigned long flags = 0;
2859
2860 spin_lock_irqsave(shost->host_lock, flags);
2861 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
2862 spin_unlock_irqrestore(shost->host_lock, flags);
2863 return 0;
2864}
2865
072b91f9
BK		 2866/**
2867 * ibmvfc_slave_configure - Configure the device
2868 * @sdev: struct scsi_device device to configure
2869 *
2870 * Enable allow_restart for a device if it is a disk. Adjust the
2871 * queue_depth here also.
2872 *
2873 * Returns:
2874 * 0
2875 **/
2876static int ibmvfc_slave_configure(struct scsi_device *sdev)
2877{
2878 struct Scsi_Host *shost = sdev->host;
072b91f9
BK		 2879 unsigned long flags = 0;
2880
2881 spin_lock_irqsave(shost->host_lock, flags);
2882 if (sdev->type == TYPE_DISK)
2883 sdev->allow_restart = 1;
072b91f9
BK		 2884 spin_unlock_irqrestore(shost->host_lock, flags);
2885 return 0;
2886}
2887
2888/**
2889 * ibmvfc_change_queue_depth - Change the device's queue depth
2890 * @sdev: scsi device struct
2891 * @qdepth: depth to set
e881a172 2892 * @reason: calling context
072b91f9
BK		 2893 *
2894 * Return value:
2895 * actual depth set
2896 **/
db5ed4df 2897static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
072b91f9
BK		 2898{
2899 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
2900 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
2901
db5ed4df 2902 return scsi_change_queue_depth(sdev, qdepth);
072b91f9
BK		 2903}
2904
072b91f9
BK		 2905static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
2906 struct device_attribute *attr, char *buf)
2907{
2908 struct Scsi_Host *shost = class_to_shost(dev);
2909 struct ibmvfc_host *vhost = shost_priv(shost);
2910
2911 return snprintf(buf, PAGE_SIZE, "%s\n",
2912 vhost->login_buf->resp.partition_name);
2913}
2914
072b91f9
BK		 2915static ssize_t ibmvfc_show_host_device_name(struct device *dev,
2916 struct device_attribute *attr, char *buf)
2917{
2918 struct Scsi_Host *shost = class_to_shost(dev);
2919 struct ibmvfc_host *vhost = shost_priv(shost);
2920
2921 return snprintf(buf, PAGE_SIZE, "%s\n",
2922 vhost->login_buf->resp.device_name);
2923}
2924
072b91f9
BK		 2925static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
2926 struct device_attribute *attr, char *buf)
2927{
2928 struct Scsi_Host *shost = class_to_shost(dev);
2929 struct ibmvfc_host *vhost = shost_priv(shost);
2930
2931 return snprintf(buf, PAGE_SIZE, "%s\n",
2932 vhost->login_buf->resp.port_loc_code);
2933}
2934
072b91f9
BK		 2935static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
2936 struct device_attribute *attr, char *buf)
2937{
2938 struct Scsi_Host *shost = class_to_shost(dev);
2939 struct ibmvfc_host *vhost = shost_priv(shost);
2940
2941 return snprintf(buf, PAGE_SIZE, "%s\n",
2942 vhost->login_buf->resp.drc_name);
2943}
2944
072b91f9
BK		 2945static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
2946 struct device_attribute *attr, char *buf)
2947{
2948 struct Scsi_Host *shost = class_to_shost(dev);
2949 struct ibmvfc_host *vhost = shost_priv(shost);
2950 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version);
2951}
2952
497f9c50
BK		 2953static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
2954 struct device_attribute *attr, char *buf)
2955{
2956 struct Scsi_Host *shost = class_to_shost(dev);
2957 struct ibmvfc_host *vhost = shost_priv(shost);
2958 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities);
2959}
2960
072b91f9
BK		 2961/**
2962 * ibmvfc_show_log_level - Show the adapter's error logging level
2963 * @dev: class device struct
2964 * @buf: buffer
2965 *
2966 * Return value:
2967 * number of bytes printed to buffer
2968 **/
2969static ssize_t ibmvfc_show_log_level(struct device *dev,
2970 struct device_attribute *attr, char *buf)
2971{
2972 struct Scsi_Host *shost = class_to_shost(dev);
2973 struct ibmvfc_host *vhost = shost_priv(shost);
2974 unsigned long flags = 0;
2975 int len;
2976
2977 spin_lock_irqsave(shost->host_lock, flags);
2978 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
2979 spin_unlock_irqrestore(shost->host_lock, flags);
2980 return len;
2981}
2982
2983/**
2984 * ibmvfc_store_log_level - Change the adapter's error logging level
2985 * @dev: class device struct
2986 * @buf: buffer
2987 *
2988 * Return value:
2989 * number of bytes printed to buffer
2990 **/
2991static ssize_t ibmvfc_store_log_level(struct device *dev,
2992 struct device_attribute *attr,
2993 const char *buf, size_t count)
2994{
2995 struct Scsi_Host *shost = class_to_shost(dev);
2996 struct ibmvfc_host *vhost = shost_priv(shost);
2997 unsigned long flags = 0;
2998
2999 spin_lock_irqsave(shost->host_lock, flags);
3000 vhost->log_level = simple_strtoul(buf, NULL, 10);
3001 spin_unlock_irqrestore(shost->host_lock, flags);
3002 return strlen(buf);
3003}
3004
85e2399e
BK		 3005static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3006static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3007static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3008static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3009static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
497f9c50 3010static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
85e2399e
BK		 3011static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3012 ibmvfc_show_log_level, ibmvfc_store_log_level);
072b91f9
BK		 3013
3014#ifdef CONFIG_SCSI_IBMVFC_TRACE
3015/**
3016 * ibmvfc_read_trace - Dump the adapter trace
2c3c8bea 3017 * @filp: open sysfs file
072b91f9
BK		 3018 * @kobj: kobject struct
3019 * @bin_attr: bin_attribute struct
3020 * @buf: buffer
3021 * @off: offset
3022 * @count: buffer size
3023 *
3024 * Return value:
3025 * number of bytes printed to buffer
3026 **/
2c3c8bea 3027static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
072b91f9
BK		 3028 struct bin_attribute *bin_attr,
3029 char *buf, loff_t off, size_t count)
3030{
3031 struct device *dev = container_of(kobj, struct device, kobj);
3032 struct Scsi_Host *shost = class_to_shost(dev);
3033 struct ibmvfc_host *vhost = shost_priv(shost);
3034 unsigned long flags = 0;
3035 int size = IBMVFC_TRACE_SIZE;
3036 char *src = (char *)vhost->trace;
3037
3038 if (off > size)
3039 return 0;
3040 if (off + count > size) {
3041 size -= off;
3042 count = size;
3043 }
3044
3045 spin_lock_irqsave(shost->host_lock, flags);
3046 memcpy(buf, &src[off], count);
3047 spin_unlock_irqrestore(shost->host_lock, flags);
3048 return count;
3049}
3050
3051static struct bin_attribute ibmvfc_trace_attr = {
3052 .attr = {
3053 .name = "trace",
3054 .mode = S_IRUGO,
3055 },
3056 .size = 0,
3057 .read = ibmvfc_read_trace,
3058};
3059#endif
3060
3061static struct device_attribute *ibmvfc_attrs[] = {
85e2399e
BK		 3062 &dev_attr_partition_name,
3063 &dev_attr_device_name,
3064 &dev_attr_port_loc_code,
3065 &dev_attr_drc_name,
3066 &dev_attr_npiv_version,
497f9c50 3067 &dev_attr_capabilities,
85e2399e 3068 &dev_attr_log_level,
072b91f9
BK		 3069 NULL
3070};
3071
3072static struct scsi_host_template driver_template = {
3073 .module = THIS_MODULE,
3074 .name = "IBM POWER Virtual FC Adapter",
3075 .proc_name = IBMVFC_NAME,
3076 .queuecommand = ibmvfc_queuecommand,
b6a05c82 3077 .eh_timed_out = fc_eh_timed_out,
072b91f9
BK		 3078 .eh_abort_handler = ibmvfc_eh_abort_handler,
3079 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3080 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3081 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3082 .slave_alloc = ibmvfc_slave_alloc,
3083 .slave_configure = ibmvfc_slave_configure,
ad8dcffa 3084 .target_alloc = ibmvfc_target_alloc,
072b91f9
BK		 3085 .scan_finished = ibmvfc_scan_finished,
3086 .change_queue_depth = ibmvfc_change_queue_depth,
072b91f9
BK		 3087 .cmd_per_lun = 16,
3088 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3089 .this_id = -1,
3090 .sg_tablesize = SG_ALL,
3091 .max_sectors = IBMVFC_MAX_SECTORS,
072b91f9 3092 .shost_attrs = ibmvfc_attrs,
c40ecc12 3093 .track_queue_depth = 1,
072b91f9
BK		 3094};
3095
3096/**
3097 * ibmvfc_next_async_crq - Returns the next entry in async queue
3098 * @vhost: ibmvfc host struct
3099 *
3100 * Returns:
3101 * Pointer to next entry in queue / NULL if empty
3102 **/
3103static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3104{
3105 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq;
3106 struct ibmvfc_async_crq *crq;
3107
3108 crq = &async_crq->msgs[async_crq->cur];
3109 if (crq->valid & 0x80) {
3110 if (++async_crq->cur == async_crq->size)
3111 async_crq->cur = 0;
f5832fa2 3112 rmb();
072b91f9
BK		 3113 } else
3114 crq = NULL;
3115
3116 return crq;
3117}
3118
3119/**
3120 * ibmvfc_next_crq - Returns the next entry in message queue
3121 * @vhost: ibmvfc host struct
3122 *
3123 * Returns:
3124 * Pointer to next entry in queue / NULL if empty
3125 **/
3126static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3127{
3128 struct ibmvfc_crq_queue *queue = &vhost->crq;
3129 struct ibmvfc_crq *crq;
3130
3131 crq = &queue->msgs[queue->cur];
3132 if (crq->valid & 0x80) {
3133 if (++queue->cur == queue->size)
3134 queue->cur = 0;
f5832fa2 3135 rmb();
072b91f9
BK		 3136 } else
3137 crq = NULL;
3138
3139 return crq;
3140}
3141
3142/**
3143 * ibmvfc_interrupt - Interrupt handler
3144 * @irq: number of irq to handle, not used
3145 * @dev_instance: ibmvfc_host that received interrupt
3146 *
3147 * Returns:
3148 * IRQ_HANDLED
3149 **/
3150static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3151{
3152 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
039a0898
BK		 3153 unsigned long flags;
3154
3155 spin_lock_irqsave(vhost->host->host_lock, flags);
3156 vio_disable_interrupts(to_vio_dev(vhost->dev));
3157 tasklet_schedule(&vhost->tasklet);
3158 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3159 return IRQ_HANDLED;
3160}
3161
3162/**
3163 * ibmvfc_tasklet - Interrupt handler tasklet
3164 * @data: ibmvfc host struct
3165 *
3166 * Returns:
3167 * Nothing
3168 **/
3169static void ibmvfc_tasklet(void *data)
3170{
3171 struct ibmvfc_host *vhost = data;
072b91f9
BK		 3172 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3173 struct ibmvfc_crq *crq;
3174 struct ibmvfc_async_crq *async;
3175 unsigned long flags;
3176 int done = 0;
3177
3178 spin_lock_irqsave(vhost->host->host_lock, flags);
072b91f9 3179 while (!done) {
072b91f9
BK		 3180 /* Pull all the valid messages off the async CRQ */
3181 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3182 ibmvfc_handle_async(async, vhost);
3183 async->valid = 0;
f5832fa2 3184 wmb();
072b91f9
BK		 3185 }
3186
f1d7fb7a
BK		 3187 /* Pull all the valid messages off the CRQ */
3188 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
072b91f9
BK		 3189 ibmvfc_handle_crq(crq, vhost);
3190 crq->valid = 0;
f5832fa2 3191 wmb();
f1d7fb7a
BK		 3192 }
3193
3194 vio_enable_interrupts(vdev);
3195 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
072b91f9
BK		 3196 vio_disable_interrupts(vdev);
3197 ibmvfc_handle_async(async, vhost);
4081b77c 3198 async->valid = 0;
f5832fa2 3199 wmb();
f1d7fb7a
BK		 3200 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3201 vio_disable_interrupts(vdev);
3202 ibmvfc_handle_crq(crq, vhost);
3203 crq->valid = 0;
f5832fa2 3204 wmb();
072b91f9
BK		 3205 } else
3206 done = 1;
3207 }
3208
3209 spin_unlock_irqrestore(vhost->host->host_lock, flags);
072b91f9
BK		 3210}
3211
3212/**
3213 * ibmvfc_init_tgt - Set the next init job step for the target
3214 * @tgt: ibmvfc target struct
3215 * @job_step: job step to perform
3216 *
3217 **/
3218static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3219 void (*job_step) (struct ibmvfc_target *))
3220{
3221 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT);
3222 tgt->job_step = job_step;
3223 wake_up(&tgt->vhost->work_wait_q);
3224}
3225
3226/**
3227 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization
3228 * @tgt: ibmvfc target struct
3229 * @job_step: initialization job step
3230 *
7d0e4622
BK		 3231 * Returns: 1 if step will be retried / 0 if not
3232 *
072b91f9 3233 **/
7d0e4622 3234static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
072b91f9
BK		 3235 void (*job_step) (struct ibmvfc_target *))
3236{
1c41fa82 3237 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
072b91f9
BK		 3238 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3239 wake_up(&tgt->vhost->work_wait_q);
7d0e4622 3240 return 0;
072b91f9
BK		 3241 } else
3242 ibmvfc_init_tgt(tgt, job_step);
7d0e4622 3243 return 1;
072b91f9
BK		 3244}
3245
a3b7aeab
BK		 3246/* Defined in FC-LS */
3247static const struct {
3248 int code;
3249 int retry;
3250 int logged_in;
3251} prli_rsp [] = {
3252 { 0, 1, 0 },
3253 { 1, 0, 1 },
3254 { 2, 1, 0 },
3255 { 3, 1, 0 },
3256 { 4, 0, 0 },
3257 { 5, 0, 0 },
3258 { 6, 0, 1 },
3259 { 7, 0, 0 },
3260 { 8, 1, 0 },
3261};
3262
3263/**
3264 * ibmvfc_get_prli_rsp - Find PRLI response index
3265 * @flags: PRLI response flags
3266 *
3267 **/
3268static int ibmvfc_get_prli_rsp(u16 flags)
3269{
3270 int i;
3271 int code = (flags & 0x0f00) >> 8;
3272
3273 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3274 if (prli_rsp[i].code == code)
3275 return i;
3276
3277 return 0;
3278}
3279
072b91f9
BK		 3280/**
3281 * ibmvfc_tgt_prli_done - Completion handler for Process Login
3282 * @evt: ibmvfc event struct
3283 *
3284 **/
3285static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3286{
3287 struct ibmvfc_target *tgt = evt->tgt;
3288 struct ibmvfc_host *vhost = evt->vhost;
3289 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
a3b7aeab 3290 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
0aab6c3f 3291 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3292 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3293
3294 vhost->discovery_threads--;
3295 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3296 switch (status) {
3297 case IBMVFC_MAD_SUCCESS:
a3b7aeab
BK		 3298 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3299 parms->type, parms->flags, parms->service_parms);
3300
3301 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
0aab6c3f 3302 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
a3b7aeab 3303 if (prli_rsp[index].logged_in) {
0aab6c3f 3304 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
a3b7aeab
BK		 3305 tgt->need_login = 0;
3306 tgt->ids.roles = 0;
0aab6c3f 3307 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
a3b7aeab 3308 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
0aab6c3f 3309 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
a3b7aeab 3310 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
43c8da90 3311 tgt->add_rport = 1;
a3b7aeab
BK		 3312 } else
3313 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3314 } else if (prli_rsp[index].retry)
3315 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3316 else
3317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3318 } else
3319 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
072b91f9
BK		 3320 break;
3321 case IBMVFC_MAD_DRIVER_FAILED:
3322 break;
3323 case IBMVFC_MAD_CRQ_ERROR:
3324 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3325 break;
3326 case IBMVFC_MAD_FAILED:
3327 default:
0aab6c3f
TD		 3328 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3329 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
017b2ae3
BK		 3330 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3331 else if (tgt->logo_rcvd)
3332 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
0aab6c3f 3333 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3334 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
10e79499
BK		 3335 else
3336 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3337
3338 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
0aab6c3f 3339 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4 3340 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status);
072b91f9 3341 break;
f36cfe6a 3342 }
072b91f9
BK		 3343
3344 kref_put(&tgt->kref, ibmvfc_release_tgt);
3345 ibmvfc_free_event(evt);
3346 wake_up(&vhost->work_wait_q);
3347}
3348
3349/**
3350 * ibmvfc_tgt_send_prli - Send a process login
3351 * @tgt: ibmvfc target struct
3352 *
3353 **/
3354static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
3355{
3356 struct ibmvfc_process_login *prli;
3357 struct ibmvfc_host *vhost = tgt->vhost;
3358 struct ibmvfc_event *evt;
3359
3360 if (vhost->discovery_threads >= disc_threads)
3361 return;
3362
3363 kref_get(&tgt->kref);
3364 evt = ibmvfc_get_event(vhost);
3365 vhost->discovery_threads++;
3366 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
3367 evt->tgt = tgt;
3368 prli = &evt->iu.prli;
3369 memset(prli, 0, sizeof(*prli));
0aab6c3f
TD		 3370 prli->common.version = cpu_to_be32(1);
3371 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
3372 prli->common.length = cpu_to_be16(sizeof(*prli));
3373 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3374
3375 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
0aab6c3f
TD		 3376 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
3377 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
bb5a5054 3378 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
072b91f9 3379
a6104b1e
TD		 3380 if (cls3_error)
3381 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
3382
072b91f9
BK		 3383 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3384 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3385 vhost->discovery_threads--;
3386 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3387 kref_put(&tgt->kref, ibmvfc_release_tgt);
3388 } else
3389 tgt_dbg(tgt, "Sent process login\n");
3390}
3391
3392/**
3393 * ibmvfc_tgt_plogi_done - Completion handler for Port Login
3394 * @evt: ibmvfc event struct
3395 *
3396 **/
3397static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
3398{
3399 struct ibmvfc_target *tgt = evt->tgt;
3400 struct ibmvfc_host *vhost = evt->vhost;
3401 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
0aab6c3f 3402 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3403 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3404
3405 vhost->discovery_threads--;
3406 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3407 switch (status) {
3408 case IBMVFC_MAD_SUCCESS:
3409 tgt_dbg(tgt, "Port Login succeeded\n");
3410 if (tgt->ids.port_name &&
3411 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
3412 vhost->reinit = 1;
3413 tgt_dbg(tgt, "Port re-init required\n");
3414 break;
3415 }
3416 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
3417 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
3418 tgt->ids.port_id = tgt->scsi_id;
072b91f9
BK		 3419 memcpy(&tgt->service_parms, &rsp->service_parms,
3420 sizeof(tgt->service_parms));
3421 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
3422 sizeof(tgt->service_parms_change));
3423 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
3424 break;
3425 case IBMVFC_MAD_DRIVER_FAILED:
3426 break;
3427 case IBMVFC_MAD_CRQ_ERROR:
3428 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3429 break;
3430 case IBMVFC_MAD_FAILED:
3431 default:
0aab6c3f 3432 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3433 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
10e79499
BK		 3434 else
3435 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3436
3437 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
3e6f7de4
TD		 3438 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3439 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
3440 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
3441 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status);
072b91f9 3442 break;
f36cfe6a 3443 }
072b91f9
BK		 3444
3445 kref_put(&tgt->kref, ibmvfc_release_tgt);
3446 ibmvfc_free_event(evt);
3447 wake_up(&vhost->work_wait_q);
3448}
3449
3450/**
3451 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target
3452 * @tgt: ibmvfc target struct
3453 *
3454 **/
3455static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
3456{
3457 struct ibmvfc_port_login *plogi;
3458 struct ibmvfc_host *vhost = tgt->vhost;
3459 struct ibmvfc_event *evt;
3460
3461 if (vhost->discovery_threads >= disc_threads)
3462 return;
3463
3464 kref_get(&tgt->kref);
017b2ae3 3465 tgt->logo_rcvd = 0;
072b91f9
BK		 3466 evt = ibmvfc_get_event(vhost);
3467 vhost->discovery_threads++;
3468 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3469 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
3470 evt->tgt = tgt;
3471 plogi = &evt->iu.plogi;
3472 memset(plogi, 0, sizeof(*plogi));
0aab6c3f
TD		 3473 plogi->common.version = cpu_to_be32(1);
3474 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
3475 plogi->common.length = cpu_to_be16(sizeof(*plogi));
3476 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3477
3478 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3479 vhost->discovery_threads--;
3480 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3481 kref_put(&tgt->kref, ibmvfc_release_tgt);
3482 } else
3483 tgt_dbg(tgt, "Sent port login\n");
3484}
3485
3486/**
3487 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD
3488 * @evt: ibmvfc event struct
3489 *
3490 **/
3491static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
3492{
3493 struct ibmvfc_target *tgt = evt->tgt;
3494 struct ibmvfc_host *vhost = evt->vhost;
3495 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
0aab6c3f 3496 u32 status = be16_to_cpu(rsp->common.status);
072b91f9
BK		 3497
3498 vhost->discovery_threads--;
3499 ibmvfc_free_event(evt);
3500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3501
3502 switch (status) {
3503 case IBMVFC_MAD_SUCCESS:
3504 tgt_dbg(tgt, "Implicit Logout succeeded\n");
3505 break;
3506 case IBMVFC_MAD_DRIVER_FAILED:
3507 kref_put(&tgt->kref, ibmvfc_release_tgt);
3508 wake_up(&vhost->work_wait_q);
3509 return;
3510 case IBMVFC_MAD_FAILED:
3511 default:
3512 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
3513 break;
f36cfe6a 3514 }
072b91f9
BK		 3515
3516 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT)
3517 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
3518 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS &&
3519 tgt->scsi_id != tgt->new_scsi_id)
3520 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
3521 kref_put(&tgt->kref, ibmvfc_release_tgt);
3522 wake_up(&vhost->work_wait_q);
3523}
3524
3525/**
3526 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target
3527 * @tgt: ibmvfc target struct
3528 *
3529 **/
3530static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
3531{
3532 struct ibmvfc_implicit_logout *mad;
3533 struct ibmvfc_host *vhost = tgt->vhost;
3534 struct ibmvfc_event *evt;
3535
3536 if (vhost->discovery_threads >= disc_threads)
3537 return;
3538
3539 kref_get(&tgt->kref);
3540 evt = ibmvfc_get_event(vhost);
3541 vhost->discovery_threads++;
3542 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT);
3543 evt->tgt = tgt;
3544 mad = &evt->iu.implicit_logout;
3545 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3546 mad->common.version = cpu_to_be32(1);
3547 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
3548 mad->common.length = cpu_to_be16(sizeof(*mad));
3549 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
072b91f9
BK		 3550
3551 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3552 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3553 vhost->discovery_threads--;
3554 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3555 kref_put(&tgt->kref, ibmvfc_release_tgt);
3556 } else
3557 tgt_dbg(tgt, "Sent Implicit Logout\n");
3558}
3559
989b8545
BK		 3560/**
3561 * ibmvfc_adisc_needs_plogi - Does device need PLOGI?
3562 * @mad: ibmvfc passthru mad struct
3563 * @tgt: ibmvfc target struct
3564 *
3565 * Returns:
3566 * 1 if PLOGI needed / 0 if PLOGI not needed
3567 **/
3568static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
3569 struct ibmvfc_target *tgt)
3570{
09dd15e0 3571 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
989b8545 3572 return 1;
09dd15e0 3573 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
989b8545 3574 return 1;
0aab6c3f 3575 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
989b8545
BK		 3576 return 1;
3577 return 0;
3578}
3579
3580/**
3581 * ibmvfc_tgt_adisc_done - Completion handler for ADISC
3582 * @evt: ibmvfc event struct
3583 *
3584 **/
3585static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
3586{
3587 struct ibmvfc_target *tgt = evt->tgt;
3588 struct ibmvfc_host *vhost = evt->vhost;
3589 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
0aab6c3f 3590 u32 status = be16_to_cpu(mad->common.status);
989b8545
BK		 3591 u8 fc_reason, fc_explain;
3592
3593 vhost->discovery_threads--;
3594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
10501e1c 3595 del_timer(&tgt->timer);
989b8545
BK		 3596
3597 switch (status) {
3598 case IBMVFC_MAD_SUCCESS:
3599 tgt_dbg(tgt, "ADISC succeeded\n");
3600 if (ibmvfc_adisc_needs_plogi(mad, tgt))
5e47167b 3601 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
989b8545
BK		 3602 break;
3603 case IBMVFC_MAD_DRIVER_FAILED:
3604 break;
3605 case IBMVFC_MAD_FAILED:
3606 default:
5e47167b 3607 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
0aab6c3f
TD		 3608 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
3609 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
989b8545 3610 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f 3611 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
3e6f7de4 3612 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error),
989b8545
BK		 3613 ibmvfc_get_fc_type(fc_reason), fc_reason,
3614 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
3615 break;
f36cfe6a 3616 }
989b8545
BK		 3617
3618 kref_put(&tgt->kref, ibmvfc_release_tgt);
3619 ibmvfc_free_event(evt);
3620 wake_up(&vhost->work_wait_q);
3621}
3622
3623/**
3624 * ibmvfc_init_passthru - Initialize an event struct for FC passthru
3625 * @evt: ibmvfc event struct
3626 *
3627 **/
3628static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
3629{
3630 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
3631
3632 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3633 mad->common.version = cpu_to_be32(1);
3634 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
3635 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
3636 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
3637 offsetof(struct ibmvfc_passthru_mad, iu));
3638 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
3639 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3640 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
3641 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3642 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3643 offsetof(struct ibmvfc_passthru_fc_iu, payload));
3644 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
3645 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
989b8545 3646 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
0aab6c3f
TD		 3647 offsetof(struct ibmvfc_passthru_fc_iu, response));
3648 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
989b8545
BK		 3649}
3650
10501e1c
BK		 3651/**
3652 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC
3653 * @evt: ibmvfc event struct
3654 *
3655 * Just cleanup this event struct. Everything else is handled by
3656 * the ADISC completion handler. If the ADISC never actually comes
3657 * back, we still have the timer running on the ADISC event struct
3658 * which will fire and cause the CRQ to get reset.
3659 *
3660 **/
3661static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
3662{
3663 struct ibmvfc_host *vhost = evt->vhost;
3664 struct ibmvfc_target *tgt = evt->tgt;
3665
3666 tgt_dbg(tgt, "ADISC cancel complete\n");
3667 vhost->abort_threads--;
3668 ibmvfc_free_event(evt);
3669 kref_put(&tgt->kref, ibmvfc_release_tgt);
3670 wake_up(&vhost->work_wait_q);
3671}
3672
3673/**
3674 * ibmvfc_adisc_timeout - Handle an ADISC timeout
3675 * @tgt: ibmvfc target struct
3676 *
3677 * If an ADISC times out, send a cancel. If the cancel times
3678 * out, reset the CRQ. When the ADISC comes back as cancelled,
3679 * log back into the target.
3680 **/
9a5d04fc 3681static void ibmvfc_adisc_timeout(struct timer_list *t)
10501e1c 3682{
9a5d04fc 3683 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
10501e1c
BK		 3684 struct ibmvfc_host *vhost = tgt->vhost;
3685 struct ibmvfc_event *evt;
3686 struct ibmvfc_tmf *tmf;
3687 unsigned long flags;
3688 int rc;
3689
3690 tgt_dbg(tgt, "ADISC timeout\n");
3691 spin_lock_irqsave(vhost->host->host_lock, flags);
3692 if (vhost->abort_threads >= disc_threads ||
3693 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
3694 vhost->state != IBMVFC_INITIALIZING ||
3695 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
3696 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3697 return;
3698 }
3699
3700 vhost->abort_threads++;
3701 kref_get(&tgt->kref);
3702 evt = ibmvfc_get_event(vhost);
3703 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
3704
3705 evt->tgt = tgt;
3706 tmf = &evt->iu.tmf;
3707 memset(tmf, 0, sizeof(*tmf));
0aab6c3f
TD		 3708 tmf->common.version = cpu_to_be32(1);
3709 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
3710 tmf->common.length = cpu_to_be16(sizeof(*tmf));
3711 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
3712 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
10501e1c
BK		 3713
3714 rc = ibmvfc_send_event(evt, vhost, default_timeout);
3715
3716 if (rc) {
3717 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
3718 vhost->abort_threads--;
3719 kref_put(&tgt->kref, ibmvfc_release_tgt);
3720 __ibmvfc_reset_host(vhost);
3721 } else
3722 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
3723 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3724}
3725
989b8545
BK		 3726/**
3727 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target
3728 * @tgt: ibmvfc target struct
3729 *
10501e1c
BK		 3730 * When sending an ADISC we end up with two timers running. The
3731 * first timer is the timer in the ibmvfc target struct. If this
3732 * fires, we send a cancel to the target. The second timer is the
3733 * timer on the ibmvfc event for the ADISC, which is longer. If that
3734 * fires, it means the ADISC timed out and our attempt to cancel it
3735 * also failed, so we need to reset the CRQ.
989b8545
BK		 3736 **/
3737static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
3738{
3739 struct ibmvfc_passthru_mad *mad;
3740 struct ibmvfc_host *vhost = tgt->vhost;
3741 struct ibmvfc_event *evt;
3742
3743 if (vhost->discovery_threads >= disc_threads)
3744 return;
3745
3746 kref_get(&tgt->kref);
3747 evt = ibmvfc_get_event(vhost);
3748 vhost->discovery_threads++;
3749 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
3750 evt->tgt = tgt;
3751
3752 ibmvfc_init_passthru(evt);
3753 mad = &evt->iu.passthru;
0aab6c3f
TD		 3754 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
3755 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
3756 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
989b8545 3757
0aab6c3f 3758 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
989b8545
BK		 3759 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
3760 sizeof(vhost->login_buf->resp.port_name));
3761 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
3762 sizeof(vhost->login_buf->resp.node_name));
0aab6c3f 3763 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
989b8545 3764
10501e1c
BK		 3765 if (timer_pending(&tgt->timer))
3766 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
3767 else {
10501e1c 3768 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
10501e1c
BK		 3769 add_timer(&tgt->timer);
3770 }
3771
989b8545 3772 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
10501e1c 3773 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
989b8545 3774 vhost->discovery_threads--;
10501e1c 3775 del_timer(&tgt->timer);
989b8545
BK		 3776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3777 kref_put(&tgt->kref, ibmvfc_release_tgt);
3778 } else
3779 tgt_dbg(tgt, "Sent ADISC\n");
3780}
3781
072b91f9
BK		 3782/**
3783 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
3784 * @evt: ibmvfc event struct
3785 *
3786 **/
3787static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
3788{
3789 struct ibmvfc_target *tgt = evt->tgt;
3790 struct ibmvfc_host *vhost = evt->vhost;
3791 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
0aab6c3f 3792 u32 status = be16_to_cpu(rsp->common.status);
7d0e4622 3793 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3794
3795 vhost->discovery_threads--;
3796 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3797 switch (status) {
3798 case IBMVFC_MAD_SUCCESS:
3799 tgt_dbg(tgt, "Query Target succeeded\n");
0aab6c3f
TD		 3800 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id);
3801 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
072b91f9 3802 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
989b8545
BK		 3803 else
3804 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
072b91f9
BK		 3805 break;
3806 case IBMVFC_MAD_DRIVER_FAILED:
3807 break;
3808 case IBMVFC_MAD_CRQ_ERROR:
3809 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
3810 break;
3811 case IBMVFC_MAD_FAILED:
3812 default:
0aab6c3f
TD		 3813 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
3814 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
3815 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
072b91f9 3816 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
0aab6c3f 3817 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 3818 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
10e79499
BK		 3819 else
3820 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
7d0e4622
BK		 3821
3822 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
0aab6c3f 3823 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4
TD		 3824 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
3825 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
3826 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain),
3827 status);
072b91f9 3828 break;
f36cfe6a 3829 }
072b91f9
BK		 3830
3831 kref_put(&tgt->kref, ibmvfc_release_tgt);
3832 ibmvfc_free_event(evt);
3833 wake_up(&vhost->work_wait_q);
3834}
3835
3836/**
3837 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target
3838 * @tgt: ibmvfc target struct
3839 *
3840 **/
3841static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
3842{
3843 struct ibmvfc_query_tgt *query_tgt;
3844 struct ibmvfc_host *vhost = tgt->vhost;
3845 struct ibmvfc_event *evt;
3846
3847 if (vhost->discovery_threads >= disc_threads)
3848 return;
3849
3850 kref_get(&tgt->kref);
3851 evt = ibmvfc_get_event(vhost);
3852 vhost->discovery_threads++;
3853 evt->tgt = tgt;
3854 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
3855 query_tgt = &evt->iu.query_tgt;
3856 memset(query_tgt, 0, sizeof(*query_tgt));
0aab6c3f
TD		 3857 query_tgt->common.version = cpu_to_be32(1);
3858 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
3859 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
3860 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
072b91f9
BK		 3861
3862 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
3863 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
3864 vhost->discovery_threads--;
3865 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3866 kref_put(&tgt->kref, ibmvfc_release_tgt);
3867 } else
3868 tgt_dbg(tgt, "Sent Query Target\n");
3869}
3870
3871/**
3872 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target
3873 * @vhost: ibmvfc host struct
3874 * @scsi_id: SCSI ID to allocate target for
3875 *
3876 * Returns:
3877 * 0 on success / other on failure
3878 **/
3879static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
3880{
3881 struct ibmvfc_target *tgt;
3882 unsigned long flags;
3883
3884 spin_lock_irqsave(vhost->host->host_lock, flags);
3885 list_for_each_entry(tgt, &vhost->targets, queue) {
3886 if (tgt->scsi_id == scsi_id) {
3887 if (tgt->need_login)
3888 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3889 goto unlock_out;
3890 }
3891 }
3892 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3893
7270b9bd 3894 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
0883e3b3 3895 memset(tgt, 0, sizeof(*tgt));
072b91f9
BK		 3896 tgt->scsi_id = scsi_id;
3897 tgt->new_scsi_id = scsi_id;
3898 tgt->vhost = vhost;
3899 tgt->need_login = 1;
10501e1c 3900 tgt->cancel_key = vhost->task_set++;
9a5d04fc 3901 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
072b91f9
BK		 3902 kref_init(&tgt->kref);
3903 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
3904 spin_lock_irqsave(vhost->host->host_lock, flags);
3905 list_add_tail(&tgt->queue, &vhost->targets);
3906
3907unlock_out:
3908 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3909 return 0;
3910}
3911
3912/**
3913 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets
3914 * @vhost: ibmvfc host struct
3915 *
3916 * Returns:
3917 * 0 on success / other on failure
3918 **/
3919static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
3920{
3921 int i, rc;
3922
3923 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
3924 rc = ibmvfc_alloc_target(vhost,
0aab6c3f
TD		 3925 be32_to_cpu(vhost->disc_buf->scsi_id[i]) &
3926 IBMVFC_DISC_TGT_SCSI_ID_MASK);
072b91f9
BK		 3927
3928 return rc;
3929}
3930
3931/**
3932 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD
3933 * @evt: ibmvfc event struct
3934 *
3935 **/
3936static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
3937{
3938 struct ibmvfc_host *vhost = evt->vhost;
3939 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
0aab6c3f 3940 u32 mad_status = be16_to_cpu(rsp->common.status);
7d0e4622 3941 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 3942
3943 switch (mad_status) {
3944 case IBMVFC_MAD_SUCCESS:
3945 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
0aab6c3f 3946 vhost->num_targets = be32_to_cpu(rsp->num_written);
072b91f9
BK		 3947 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
3948 break;
3949 case IBMVFC_MAD_FAILED:
7d0e4622
BK		 3950 level += ibmvfc_retry_host_init(vhost);
3951 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
0aab6c3f 3952 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4 3953 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
072b91f9
BK		 3954 break;
3955 case IBMVFC_MAD_DRIVER_FAILED:
3956 break;
3957 default:
3958 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
3959 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3960 break;
3961 }
3962
3963 ibmvfc_free_event(evt);
3964 wake_up(&vhost->work_wait_q);
3965}
3966
3967/**
3968 * ibmvfc_discover_targets - Send Discover Targets MAD
3969 * @vhost: ibmvfc host struct
3970 *
3971 **/
3972static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
3973{
3974 struct ibmvfc_discover_targets *mad;
3975 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
3976
3977 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
3978 mad = &evt->iu.discover_targets;
3979 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 3980 mad->common.version = cpu_to_be32(1);
3981 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
3982 mad->common.length = cpu_to_be16(sizeof(*mad));
3983 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
3984 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
3985 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
072b91f9
BK		 3986 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
3987
3988 if (!ibmvfc_send_event(evt, vhost, default_timeout))
3989 ibmvfc_dbg(vhost, "Sent discover targets\n");
3990 else
3991 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3992}
3993
3994/**
3995 * ibmvfc_npiv_login_done - Completion handler for NPIV Login
3996 * @evt: ibmvfc event struct
3997 *
3998 **/
3999static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
4000{
4001 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4002 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
072b91f9
BK		 4003 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
4004 unsigned int npiv_max_sectors;
7d0e4622 4005 int level = IBMVFC_DEFAULT_LOG_LEVEL;
072b91f9
BK		 4006
4007 switch (mad_status) {
4008 case IBMVFC_MAD_SUCCESS:
4009 ibmvfc_free_event(evt);
4010 break;
4011 case IBMVFC_MAD_FAILED:
0aab6c3f 4012 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
7d0e4622 4013 level += ibmvfc_retry_host_init(vhost);
072b91f9
BK		 4014 else
4015 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
7d0e4622 4016 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
0aab6c3f 4017 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3e6f7de4 4018 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
072b91f9
BK		 4019 ibmvfc_free_event(evt);
4020 return;
4021 case IBMVFC_MAD_CRQ_ERROR:
4022 ibmvfc_retry_host_init(vhost);
4023 case IBMVFC_MAD_DRIVER_FAILED:
4024 ibmvfc_free_event(evt);
4025 return;
4026 default:
4027 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
4028 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4029 ibmvfc_free_event(evt);
4030 return;
4031 }
4032
4033 vhost->client_migrated = 0;
4034
0aab6c3f 4035 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
072b91f9
BK		 4036 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
4037 rsp->flags);
4038 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4039 wake_up(&vhost->work_wait_q);
4040 return;
4041 }
4042
0aab6c3f 4043 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
072b91f9
BK		 4044 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
4045 rsp->max_cmds);
4046 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4047 wake_up(&vhost->work_wait_q);
4048 return;
4049 }
4050
79111d08 4051 vhost->logged_in = 1;
0aab6c3f 4052 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
072b91f9
BK		 4053 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
4054 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
4055 rsp->drc_name, npiv_max_sectors);
4056
0aab6c3f
TD		 4057 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
4058 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
4059 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
4060 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
072b91f9
BK		 4061 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
4062 fc_host_supported_classes(vhost->host) = 0;
0aab6c3f 4063 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4064 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
0aab6c3f 4065 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4066 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
0aab6c3f 4067 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
072b91f9
BK		 4068 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
4069 fc_host_maxframe_size(vhost->host) =
0aab6c3f 4070 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4071
0aab6c3f 4072 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
072b91f9
BK		 4073 vhost->host->max_sectors = npiv_max_sectors;
4074 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4075 wake_up(&vhost->work_wait_q);
4076}
4077
4078/**
4079 * ibmvfc_npiv_login - Sends NPIV login
4080 * @vhost: ibmvfc host struct
4081 *
4082 **/
4083static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
4084{
4085 struct ibmvfc_npiv_login_mad *mad;
4086 struct ibmvfc_event *evt = ibmvfc_get_event(vhost);
4087
4088 ibmvfc_gather_partition_info(vhost);
4089 ibmvfc_set_login_info(vhost);
4090 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
4091
4092 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
4093 mad = &evt->iu.npiv_login;
4094 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
0aab6c3f
TD		 4095 mad->common.version = cpu_to_be32(1);
4096 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
4097 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
4098 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
4099 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
072b91f9 4100
072b91f9
BK		 4101 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4102
4103 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4104 ibmvfc_dbg(vhost, "Sent NPIV login\n");
4105 else
4106 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4107};
4108
79111d08
BK		 4109/**
4110 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout
4111 * @vhost: ibmvfc host struct
4112 *
4113 **/
4114static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
4115{
4116 struct ibmvfc_host *vhost = evt->vhost;
0aab6c3f 4117 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
79111d08
BK		 4118
4119 ibmvfc_free_event(evt);
4120
4121 switch (mad_status) {
4122 case IBMVFC_MAD_SUCCESS:
4123 if (list_empty(&vhost->sent) &&
4124 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
861890c6 4125 ibmvfc_init_host(vhost);
79111d08
BK		 4126 return;
4127 }
4128 break;
4129 case IBMVFC_MAD_FAILED:
4130 case IBMVFC_MAD_NOT_SUPPORTED:
4131 case IBMVFC_MAD_CRQ_ERROR:
4132 case IBMVFC_MAD_DRIVER_FAILED:
4133 default:
4134 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
4135 break;
4136 }
4137
4138 ibmvfc_hard_reset_host(vhost);
4139}
4140
4141/**
4142 * ibmvfc_npiv_logout - Issue an NPIV Logout
4143 * @vhost: ibmvfc host struct
4144 *
4145 **/
4146static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
4147{
4148 struct ibmvfc_npiv_logout_mad *mad;
4149 struct ibmvfc_event *evt;
4150
4151 evt = ibmvfc_get_event(vhost);
4152 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
4153
4154 mad = &evt->iu.npiv_logout;
4155 memset(mad, 0, sizeof(*mad));
0aab6c3f
TD		 4156 mad->common.version = cpu_to_be32(1);
4157 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
4158 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
79111d08
BK		 4159
4160 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
4161
4162 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4163 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
4164 else
4165 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4166}
4167
072b91f9
BK		 4168/**
4169 * ibmvfc_dev_init_to_do - Is there target initialization work to do?
4170 * @vhost: ibmvfc host struct
4171 *
4172 * Returns:
4173 * 1 if work to do / 0 if not
4174 **/
4175static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
4176{
4177 struct ibmvfc_target *tgt;
4178
4179 list_for_each_entry(tgt, &vhost->targets, queue) {
4180 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
4181 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4182 return 1;
4183 }
4184
4185 return 0;
4186}
4187
4188/**
4189 * __ibmvfc_work_to_do - Is there task level work to do? (no locking)
4190 * @vhost: ibmvfc host struct
4191 *
4192 * Returns:
4193 * 1 if work to do / 0 if not
4194 **/
4195static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4196{
4197 struct ibmvfc_target *tgt;
4198
4199 if (kthread_should_stop())
4200 return 1;
4201 switch (vhost->action) {
4202 case IBMVFC_HOST_ACTION_NONE:
4203 case IBMVFC_HOST_ACTION_INIT_WAIT:
79111d08 4204 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4205 return 0;
4206 case IBMVFC_HOST_ACTION_TGT_INIT:
4207 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4208 if (vhost->discovery_threads == disc_threads)
4209 return 0;
4210 list_for_each_entry(tgt, &vhost->targets, queue)
4211 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
4212 return 1;
4213 list_for_each_entry(tgt, &vhost->targets, queue)
4214 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
4215 return 0;
4216 return 1;
79111d08 4217 case IBMVFC_HOST_ACTION_LOGO:
072b91f9
BK		 4218 case IBMVFC_HOST_ACTION_INIT:
4219 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
072b91f9 4220 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4221 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9 4222 case IBMVFC_HOST_ACTION_QUERY:
73ee5d86
BK		 4223 case IBMVFC_HOST_ACTION_RESET:
4224 case IBMVFC_HOST_ACTION_REENABLE:
072b91f9
BK		 4225 default:
4226 break;
f36cfe6a 4227 }
072b91f9
BK		 4228
4229 return 1;
4230}
4231
4232/**
4233 * ibmvfc_work_to_do - Is there task level work to do?
4234 * @vhost: ibmvfc host struct
4235 *
4236 * Returns:
4237 * 1 if work to do / 0 if not
4238 **/
4239static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
4240{
4241 unsigned long flags;
4242 int rc;
4243
4244 spin_lock_irqsave(vhost->host->host_lock, flags);
4245 rc = __ibmvfc_work_to_do(vhost);
4246 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4247 return rc;
4248}
4249
4250/**
4251 * ibmvfc_log_ae - Log async events if necessary
4252 * @vhost: ibmvfc host struct
4253 * @events: events to log
4254 *
4255 **/
4256static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
4257{
4258 if (events & IBMVFC_AE_RSCN)
4259 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
4260 if ((events & IBMVFC_AE_LINKDOWN) &&
4261 vhost->state >= IBMVFC_HALTED)
4262 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
4263 if ((events & IBMVFC_AE_LINKUP) &&
4264 vhost->state == IBMVFC_INITIALIZING)
4265 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
4266}
4267
4268/**
4269 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port
4270 * @tgt: ibmvfc target struct
4271 *
4272 **/
4273static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
4274{
4275 struct ibmvfc_host *vhost = tgt->vhost;
43c8da90 4276 struct fc_rport *rport;
072b91f9
BK		 4277 unsigned long flags;
4278
43c8da90
BK		 4279 tgt_dbg(tgt, "Adding rport\n");
4280 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
4281 spin_lock_irqsave(vhost->host->host_lock, flags);
4282
4283 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4284 tgt_dbg(tgt, "Deleting rport\n");
4285 list_del(&tgt->queue);
d5da3040 4286 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
0883e3b3 4287 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4288 fc_remote_port_delete(rport);
4289 del_timer_sync(&tgt->timer);
4290 kref_put(&tgt->kref, ibmvfc_release_tgt);
0883e3b3 4291 return;
d5da3040
BK		 4292 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
4293 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4294 return;
0883e3b3
BK		 4295 }
4296
072b91f9
BK		 4297 if (rport) {
4298 tgt_dbg(tgt, "rport add succeeded\n");
43c8da90 4299 tgt->rport = rport;
0aab6c3f 4300 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
072b91f9 4301 rport->supported_classes = 0;
52d7e861 4302 tgt->target_id = rport->scsi_target_id;
0aab6c3f 4303 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
072b91f9 4304 rport->supported_classes |= FC_COS_CLASS1;
0aab6c3f 4305 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
072b91f9 4306 rport->supported_classes |= FC_COS_CLASS2;
0aab6c3f 4307 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
072b91f9 4308 rport->supported_classes |= FC_COS_CLASS3;
d31429e1 4309 if (rport->rqst_q)
8a78362c 4310 blk_queue_max_segments(rport->rqst_q, 1);
072b91f9
BK		 4311 } else
4312 tgt_dbg(tgt, "rport add failed\n");
4313 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4314}
4315
4316/**
4317 * ibmvfc_do_work - Do task level work
4318 * @vhost: ibmvfc host struct
4319 *
4320 **/
4321static void ibmvfc_do_work(struct ibmvfc_host *vhost)
4322{
4323 struct ibmvfc_target *tgt;
4324 unsigned long flags;
4325 struct fc_rport *rport;
73ee5d86 4326 int rc;
072b91f9
BK		 4327
4328 ibmvfc_log_ae(vhost, vhost->events_to_log);
4329 spin_lock_irqsave(vhost->host->host_lock, flags);
4330 vhost->events_to_log = 0;
4331 switch (vhost->action) {
4332 case IBMVFC_HOST_ACTION_NONE:
79111d08 4333 case IBMVFC_HOST_ACTION_LOGO_WAIT:
072b91f9
BK		 4334 case IBMVFC_HOST_ACTION_INIT_WAIT:
4335 break;
73ee5d86
BK		 4336 case IBMVFC_HOST_ACTION_RESET:
4337 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4338 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4339 rc = ibmvfc_reset_crq(vhost);
4340 spin_lock_irqsave(vhost->host->host_lock, flags);
d24099df
BK		 4341 if (rc == H_CLOSED)
4342 vio_enable_interrupts(to_vio_dev(vhost->dev));
38553564
BK		 4343 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
4344 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
73ee5d86
BK		 4345 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4346 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
4347 }
4348 break;
4349 case IBMVFC_HOST_ACTION_REENABLE:
4350 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
4351 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4352 rc = ibmvfc_reenable_crq_queue(vhost);
4353 spin_lock_irqsave(vhost->host->host_lock, flags);
4354 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
4355 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4356 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
4357 }
4358 break;
79111d08
BK		 4359 case IBMVFC_HOST_ACTION_LOGO:
4360 vhost->job_step(vhost);
4361 break;
072b91f9
BK		 4362 case IBMVFC_HOST_ACTION_INIT:
4363 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
1c41fa82
BK		 4364 if (vhost->delay_init) {
4365 vhost->delay_init = 0;
4366 spin_unlock_irqrestore(vhost->host->host_lock, flags);
d2131b33 4367 ssleep(15);
1c41fa82
BK		 4368 return;
4369 } else
4370 vhost->job_step(vhost);
072b91f9
BK		 4371 break;
4372 case IBMVFC_HOST_ACTION_QUERY:
4373 list_for_each_entry(tgt, &vhost->targets, queue)
4374 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
4375 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
4376 break;
4377 case IBMVFC_HOST_ACTION_QUERY_TGTS:
4378 list_for_each_entry(tgt, &vhost->targets, queue) {
4379 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4380 tgt->job_step(tgt);
4381 break;
4382 }
4383 }
4384
4385 if (!ibmvfc_dev_init_to_do(vhost))
4386 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
4387 break;
4388 case IBMVFC_HOST_ACTION_TGT_DEL:
10e79499 4389 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
072b91f9
BK		 4390 list_for_each_entry(tgt, &vhost->targets, queue) {
4391 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
4392 tgt_dbg(tgt, "Deleting rport\n");
4393 rport = tgt->rport;
4394 tgt->rport = NULL;
4395 list_del(&tgt->queue);
d5da3040 4396 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
072b91f9
BK		 4397 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4398 if (rport)
4399 fc_remote_port_delete(rport);
10501e1c 4400 del_timer_sync(&tgt->timer);
072b91f9
BK		 4401 kref_put(&tgt->kref, ibmvfc_release_tgt);
4402 return;
4403 }
4404 }
4405
4406 if (vhost->state == IBMVFC_INITIALIZING) {
10e79499 4407 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
43c8da90
BK		 4408 if (vhost->reinit) {
4409 vhost->reinit = 0;
4410 scsi_block_requests(vhost->host);
4411 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4412 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4413 } else {
4414 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
4415 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4416 wake_up(&vhost->init_wait_q);
4417 schedule_work(&vhost->rport_add_work_q);
4418 vhost->init_retries = 0;
4419 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4420 scsi_unblock_requests(vhost->host);
4421 }
4422
10e79499
BK		 4423 return;
4424 } else {
4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
4426 vhost->job_step = ibmvfc_discover_targets;
4427 }
072b91f9
BK		 4428 } else {
4429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
4430 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4431 scsi_unblock_requests(vhost->host);
4432 wake_up(&vhost->init_wait_q);
4433 return;
4434 }
4435 break;
4436 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
4437 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
4438 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4439 ibmvfc_alloc_targets(vhost);
4440 spin_lock_irqsave(vhost->host->host_lock, flags);
4441 break;
4442 case IBMVFC_HOST_ACTION_TGT_INIT:
4443 list_for_each_entry(tgt, &vhost->targets, queue) {
4444 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
4445 tgt->job_step(tgt);
4446 break;
4447 }
4448 }
4449
10e79499
BK		 4450 if (!ibmvfc_dev_init_to_do(vhost))
4451 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
072b91f9 4452 break;
072b91f9
BK		 4453 default:
4454 break;
f36cfe6a 4455 }
072b91f9
BK		 4456
4457 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4458}
4459
4460/**
4461 * ibmvfc_work - Do task level work
4462 * @data: ibmvfc host struct
4463 *
4464 * Returns:
4465 * zero
4466 **/
4467static int ibmvfc_work(void *data)
4468{
4469 struct ibmvfc_host *vhost = data;
4470 int rc;
4471
8698a745 4472 set_user_nice(current, MIN_NICE);
072b91f9
BK		 4473
4474 while (1) {
4475 rc = wait_event_interruptible(vhost->work_wait_q,
4476 ibmvfc_work_to_do(vhost));
4477
4478 BUG_ON(rc);
4479
4480 if (kthread_should_stop())
4481 break;
4482
4483 ibmvfc_do_work(vhost);
4484 }
4485
4486 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
4487 return 0;
4488}
4489
4490/**
4491 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor
4492 * @vhost: ibmvfc host struct
4493 *
4494 * Allocates a page for messages, maps it for dma, and registers
4495 * the crq with the hypervisor.
4496 *
4497 * Return value:
4498 * zero on success / other on failure
4499 **/
4500static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
4501{
4502 int rc, retrc = -ENOMEM;
4503 struct device *dev = vhost->dev;
4504 struct vio_dev *vdev = to_vio_dev(dev);
4505 struct ibmvfc_crq_queue *crq = &vhost->crq;
4506
4507 ENTER;
4508 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL);
4509
4510 if (!crq->msgs)
4511 return -ENOMEM;
4512
4513 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4514 crq->msg_token = dma_map_single(dev, crq->msgs,
4515 PAGE_SIZE, DMA_BIDIRECTIONAL);
4516
8d8bb39b 4517 if (dma_mapping_error(dev, crq->msg_token))
072b91f9
BK		 4518 goto map_failed;
4519
4520 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4521 crq->msg_token, PAGE_SIZE);
4522
4523 if (rc == H_RESOURCE)
4524 /* maybe kexecing and resource is busy. try a reset */
4525 retrc = rc = ibmvfc_reset_crq(vhost);
4526
4527 if (rc == H_CLOSED)
4528 dev_warn(dev, "Partner adapter not ready\n");
4529 else if (rc) {
4530 dev_warn(dev, "Error %d opening adapter\n", rc);
4531 goto reg_crq_failed;
4532 }
4533
4534 retrc = 0;
4535
039a0898
BK		 4536 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
4537
072b91f9
BK		 4538 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
4539 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
4540 goto req_irq_failed;
4541 }
4542
4543 if ((rc = vio_enable_interrupts(vdev))) {
4544 dev_err(dev, "Error %d enabling interrupts\n", rc);
4545 goto req_irq_failed;
4546 }
4547
4548 crq->cur = 0;
4549 LEAVE;
4550 return retrc;
4551
4552req_irq_failed:
039a0898 4553 tasklet_kill(&vhost->tasklet);
072b91f9
BK		 4554 do {
4555 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4556 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4557reg_crq_failed:
4558 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4559map_failed:
4560 free_page((unsigned long)crq->msgs);
4561 return retrc;
4562}
4563
4564/**
4565 * ibmvfc_free_mem - Free memory for vhost
4566 * @vhost: ibmvfc host struct
4567 *
4568 * Return value:
4569 * none
4570 **/
4571static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
4572{
4573 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4574
4575 ENTER;
4576 mempool_destroy(vhost->tgt_pool);
4577 kfree(vhost->trace);
4578 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
4579 vhost->disc_buf_dma);
4580 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
4581 vhost->login_buf, vhost->login_buf_dma);
4582 dma_pool_destroy(vhost->sg_pool);
4583 dma_unmap_single(vhost->dev, async_q->msg_token,
4584 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4585 free_page((unsigned long)async_q->msgs);
4586 LEAVE;
4587}
4588
4589/**
4590 * ibmvfc_alloc_mem - Allocate memory for vhost
4591 * @vhost: ibmvfc host struct
4592 *
4593 * Return value:
4594 * 0 on success / non-zero on failure
4595 **/
4596static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
4597{
4598 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq;
4599 struct device *dev = vhost->dev;
4600
4601 ENTER;
4602 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL);
4603 if (!async_q->msgs) {
4604 dev_err(dev, "Couldn't allocate async queue.\n");
4605 goto nomem;
4606 }
4607
4608 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq);
4609 async_q->msg_token = dma_map_single(dev, async_q->msgs,
4610 async_q->size * sizeof(*async_q->msgs),
4611 DMA_BIDIRECTIONAL);
4612
8d8bb39b 4613 if (dma_mapping_error(dev, async_q->msg_token)) {
072b91f9
BK		 4614 dev_err(dev, "Failed to map async queue\n");
4615 goto free_async_crq;
4616 }
4617
4618 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
4619 SG_ALL * sizeof(struct srp_direct_buf),
4620 sizeof(struct srp_direct_buf), 0);
4621
4622 if (!vhost->sg_pool) {
4623 dev_err(dev, "Failed to allocate sg pool\n");
4624 goto unmap_async_crq;
4625 }
4626
4627 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
4628 &vhost->login_buf_dma, GFP_KERNEL);
4629
4630 if (!vhost->login_buf) {
4631 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
4632 goto free_sg_pool;
4633 }
4634
4635 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets;
4636 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
4637 &vhost->disc_buf_dma, GFP_KERNEL);
4638
4639 if (!vhost->disc_buf) {
4640 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
4641 goto free_login_buffer;
4642 }
4643
4644 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
4645 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
4646
4647 if (!vhost->trace)
4648 goto free_disc_buffer;
4649
d6886692 4650 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
072b91f9
BK		 4651 sizeof(struct ibmvfc_target));
4652
4653 if (!vhost->tgt_pool) {
4654 dev_err(dev, "Couldn't allocate target memory pool\n");
4655 goto free_trace;
4656 }
4657
4658 LEAVE;
4659 return 0;
4660
4661free_trace:
4662 kfree(vhost->trace);
4663free_disc_buffer:
4664 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
4665 vhost->disc_buf_dma);
4666free_login_buffer:
4667 dma_free_coherent(dev, sizeof(*vhost->login_buf),
4668 vhost->login_buf, vhost->login_buf_dma);
4669free_sg_pool:
4670 dma_pool_destroy(vhost->sg_pool);
4671unmap_async_crq:
4672 dma_unmap_single(dev, async_q->msg_token,
4673 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL);
4674free_async_crq:
4675 free_page((unsigned long)async_q->msgs);
4676nomem:
4677 LEAVE;
4678 return -ENOMEM;
4679}
4680
43c8da90
BK		 4681/**
4682 * ibmvfc_rport_add_thread - Worker thread for rport adds
4683 * @work: work struct
4684 *
4685 **/
4686static void ibmvfc_rport_add_thread(struct work_struct *work)
4687{
4688 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
4689 rport_add_work_q);
4690 struct ibmvfc_target *tgt;
4691 struct fc_rport *rport;
4692 unsigned long flags;
4693 int did_work;
4694
4695 ENTER;
4696 spin_lock_irqsave(vhost->host->host_lock, flags);
4697 do {
4698 did_work = 0;
4699 if (vhost->state != IBMVFC_ACTIVE)
4700 break;
4701
4702 list_for_each_entry(tgt, &vhost->targets, queue) {
4703 if (tgt->add_rport) {
4704 did_work = 1;
4705 tgt->add_rport = 0;
4706 kref_get(&tgt->kref);
4707 rport = tgt->rport;
4708 if (!rport) {
4709 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4710 ibmvfc_tgt_add_rport(tgt);
4711 } else if (get_device(&rport->dev)) {
4712 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4713 tgt_dbg(tgt, "Setting rport roles\n");
4714 fc_remote_port_rolechg(rport, tgt->ids.roles);
4715 put_device(&rport->dev);
0073887a
DC		 4716 } else {
4717 spin_unlock_irqrestore(vhost->host->host_lock, flags);
43c8da90
BK		 4718 }
4719
4720 kref_put(&tgt->kref, ibmvfc_release_tgt);
4721 spin_lock_irqsave(vhost->host->host_lock, flags);
4722 break;
4723 }
4724 }
4725 } while(did_work);
4726
4727 if (vhost->state == IBMVFC_ACTIVE)
4728 vhost->scan_complete = 1;
4729 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4730 LEAVE;
4731}
4732
072b91f9
BK		 4733/**
4734 * ibmvfc_probe - Adapter hot plug add entry point
4735 * @vdev: vio device struct
4736 * @id: vio device id struct
4737 *
4738 * Return value:
4739 * 0 on success / non-zero on failure
4740 **/
4741static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
4742{
4743 struct ibmvfc_host *vhost;
4744 struct Scsi_Host *shost;
4745 struct device *dev = &vdev->dev;
4746 int rc = -ENOMEM;
4747
4748 ENTER;
4749 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
4750 if (!shost) {
4751 dev_err(dev, "Couldn't allocate host data\n");
4752 goto out;
4753 }
4754
4755 shost->transportt = ibmvfc_transport_template;
4756 shost->can_queue = max_requests;
4757 shost->max_lun = max_lun;
4758 shost->max_id = max_targets;
4759 shost->max_sectors = IBMVFC_MAX_SECTORS;
4760 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
4761 shost->unique_id = shost->host_no;
4762
4763 vhost = shost_priv(shost);
4764 INIT_LIST_HEAD(&vhost->sent);
4765 INIT_LIST_HEAD(&vhost->free);
4766 INIT_LIST_HEAD(&vhost->targets);
4767 sprintf(vhost->name, IBMVFC_NAME);
4768 vhost->host = shost;
4769 vhost->dev = dev;
4770 vhost->partition_number = -1;
4771 vhost->log_level = log_level;
10501e1c 4772 vhost->task_set = 1;
072b91f9
BK		 4773 strcpy(vhost->partition_name, "UNKNOWN");
4774 init_waitqueue_head(&vhost->work_wait_q);
4775 init_waitqueue_head(&vhost->init_wait_q);
43c8da90 4776 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
d31429e1 4777 mutex_init(&vhost->passthru_mutex);
072b91f9
BK		 4778
4779 if ((rc = ibmvfc_alloc_mem(vhost)))
4780 goto free_scsi_host;
4781
4782 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
4783 shost->host_no);
4784
4785 if (IS_ERR(vhost->work_thread)) {
4786 dev_err(dev, "Couldn't create kernel thread: %ld\n",
4787 PTR_ERR(vhost->work_thread));
4788 goto free_host_mem;
4789 }
4790
4791 if ((rc = ibmvfc_init_crq(vhost))) {
4792 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4793 goto kill_kthread;
4794 }
4795
4796 if ((rc = ibmvfc_init_event_pool(vhost))) {
4797 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc);
4798 goto release_crq;
4799 }
4800
4801 if ((rc = scsi_add_host(shost, dev)))
4802 goto release_event_pool;
4803
a5110f29
MC		 4804 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
4805
072b91f9
BK		 4806 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
4807 &ibmvfc_trace_attr))) {
4808 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
4809 goto remove_shost;
4810 }
4811
d31429e1 4812 if (shost_to_fc_host(shost)->rqst_q)
8a78362c 4813 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
072b91f9
BK		 4814 dev_set_drvdata(dev, vhost);
4815 spin_lock(&ibmvfc_driver_lock);
4816 list_add_tail(&vhost->queue, &ibmvfc_head);
4817 spin_unlock(&ibmvfc_driver_lock);
4818
4819 ibmvfc_send_crq_init(vhost);
4820 scsi_scan_host(shost);
4821 return 0;
4822
4823remove_shost:
4824 scsi_remove_host(shost);
4825release_event_pool:
4826 ibmvfc_free_event_pool(vhost);
4827release_crq:
4828 ibmvfc_release_crq_queue(vhost);
4829kill_kthread:
4830 kthread_stop(vhost->work_thread);
4831free_host_mem:
4832 ibmvfc_free_mem(vhost);
4833free_scsi_host:
4834 scsi_host_put(shost);
4835out:
4836 LEAVE;
4837 return rc;
4838}
4839
4840/**
4841 * ibmvfc_remove - Adapter hot plug remove entry point
4842 * @vdev: vio device struct
4843 *
4844 * Return value:
4845 * 0
4846 **/
4847static int ibmvfc_remove(struct vio_dev *vdev)
4848{
4849 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
4850 unsigned long flags;
4851
4852 ENTER;
4853 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
70431105
BK		 4854
4855 spin_lock_irqsave(vhost->host->host_lock, flags);
2d0da2a4 4856 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
70431105
BK		 4857 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4858
2d0da2a4
BK		 4859 ibmvfc_wait_while_resetting(vhost);
4860 ibmvfc_release_crq_queue(vhost);
072b91f9
BK		 4861 kthread_stop(vhost->work_thread);
4862 fc_remove_host(vhost->host);
4863 scsi_remove_host(vhost->host);
072b91f9
BK		 4864
4865 spin_lock_irqsave(vhost->host->host_lock, flags);
4866 ibmvfc_purge_requests(vhost, DID_ERROR);
072b91f9 4867 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5578257c 4868 ibmvfc_free_event_pool(vhost);
072b91f9
BK		 4869
4870 ibmvfc_free_mem(vhost);
4871 spin_lock(&ibmvfc_driver_lock);
4872 list_del(&vhost->queue);
4873 spin_unlock(&ibmvfc_driver_lock);
4874 scsi_host_put(vhost->host);
4875 LEAVE;
4876 return 0;
4877}
4878
b0f4d4cf
BK		 4879/**
4880 * ibmvfc_resume - Resume from suspend
4881 * @dev: device struct
4882 *
4883 * We may have lost an interrupt across suspend/resume, so kick the
4884 * interrupt handler
4885 *
4886 */
4887static int ibmvfc_resume(struct device *dev)
4888{
4889 unsigned long flags;
4890 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
4891 struct vio_dev *vdev = to_vio_dev(dev);
4892
4893 spin_lock_irqsave(vhost->host->host_lock, flags);
4894 vio_disable_interrupts(vdev);
4895 tasklet_schedule(&vhost->tasklet);
4896 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4897 return 0;
4898}
4899
39c1ffec
BK		 4900/**
4901 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver
4902 * @vdev: vio device struct
4903 *
4904 * Return value:
4905 * Number of bytes the driver will need to DMA map at the same time in
4906 * order to perform well.
4907 */
4908static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
4909{
4910 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
4911 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
4912}
4913
e4df3eaa 4914static const struct vio_device_id ibmvfc_device_table[] = {
072b91f9
BK		 4915 {"fcp", "IBM,vfc-client"},
4916 { "", "" }
4917};
4918MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
4919
e4a80c31 4920static const struct dev_pm_ops ibmvfc_pm_ops = {
b0f4d4cf
BK		 4921 .resume = ibmvfc_resume
4922};
4923
072b91f9
BK		 4924static struct vio_driver ibmvfc_driver = {
4925 .id_table = ibmvfc_device_table,
4926 .probe = ibmvfc_probe,
4927 .remove = ibmvfc_remove,
39c1ffec 4928 .get_desired_dma = ibmvfc_get_desired_dma,
cb52d897
BH		 4929 .name = IBMVFC_NAME,
4930 .pm = &ibmvfc_pm_ops,
072b91f9
BK		 4931};
4932
4933static struct fc_function_template ibmvfc_transport_functions = {
4934 .show_host_fabric_name = 1,
4935 .show_host_node_name = 1,
4936 .show_host_port_name = 1,
4937 .show_host_supported_classes = 1,
4938 .show_host_port_type = 1,
4939 .show_host_port_id = 1,
9ab3610f 4940 .show_host_maxframe_size = 1,
072b91f9
BK		 4941
4942 .get_host_port_state = ibmvfc_get_host_port_state,
4943 .show_host_port_state = 1,
4944
4945 .get_host_speed = ibmvfc_get_host_speed,
4946 .show_host_speed = 1,
4947
4948 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
4949 .terminate_rport_io = ibmvfc_terminate_rport_io,
4950
4951 .show_rport_maxframe_size = 1,
4952 .show_rport_supported_classes = 1,
4953
4954 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
4955 .show_rport_dev_loss_tmo = 1,
4956
4957 .get_starget_node_name = ibmvfc_get_starget_node_name,
4958 .show_starget_node_name = 1,
4959
4960 .get_starget_port_name = ibmvfc_get_starget_port_name,
4961 .show_starget_port_name = 1,
4962
4963 .get_starget_port_id = ibmvfc_get_starget_port_id,
4964 .show_starget_port_id = 1,
d31429e1
BK		 4965
4966 .bsg_request = ibmvfc_bsg_request,
4967 .bsg_timeout = ibmvfc_bsg_timeout,
072b91f9
BK		 4968};
4969
4970/**
4971 * ibmvfc_module_init - Initialize the ibmvfc module
4972 *
4973 * Return value:
4974 * 0 on success / other on failure
4975 **/
4976static int __init ibmvfc_module_init(void)
4977{
4978 int rc;
4979
4980 if (!firmware_has_feature(FW_FEATURE_VIO))
4981 return -ENODEV;
4982
4983 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
4984 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
4985
4986 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
4987 if (!ibmvfc_transport_template)
4988 return -ENOMEM;
4989
4990 rc = vio_register_driver(&ibmvfc_driver);
4991 if (rc)
4992 fc_release_transport(ibmvfc_transport_template);
4993 return rc;
4994}
4995
4996/**
4997 * ibmvfc_module_exit - Teardown the ibmvfc module
4998 *
4999 * Return value:
5000 * nothing
5001 **/
5002static void __exit ibmvfc_module_exit(void)
5003{
5004 vio_unregister_driver(&ibmvfc_driver);
5005 fc_release_transport(ibmvfc_transport_template);
5006}
5007
5008module_init(ibmvfc_module_init);
5009module_exit(ibmvfc_module_exit);
Linux 6.x block layer and io_uring tree(s)