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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/irqdomain.h>
17#include <linux/kthread.h>
18#include <linux/slab.h>
19#include <linux/of.h>
20#include <linux/pm.h>
21#include <linux/stringify.h>
22#include <linux/bsg-lib.h>
23#include <asm/firmware.h>
24#include <asm/irq.h>
25#include <asm/rtas.h>
26#include <asm/vio.h>
27#include <scsi/scsi.h>
28#include <scsi/scsi_cmnd.h>
29#include <scsi/scsi_host.h>
30#include <scsi/scsi_device.h>
31#include <scsi/scsi_tcq.h>
32#include <scsi/scsi_transport_fc.h>
33#include <scsi/scsi_bsg_fc.h>
34#include "ibmvfc.h"
35
36static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
37static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT;
38static u64 max_lun = IBMVFC_MAX_LUN;
39static unsigned int max_targets = IBMVFC_MAX_TARGETS;
40static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
41static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
42static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
43static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
44static unsigned int cls3_error = IBMVFC_CLS3_ERROR;
45static unsigned int mq_enabled = IBMVFC_MQ;
46static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES;
47static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS;
48static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ;
49static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M;
50
51static LIST_HEAD(ibmvfc_head);
52static DEFINE_SPINLOCK(ibmvfc_driver_lock);
53static struct scsi_transport_template *ibmvfc_transport_template;
54
55MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver");
56MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>");
57MODULE_LICENSE("GPL");
58MODULE_VERSION(IBMVFC_DRIVER_VERSION);
59
60module_param_named(mq, mq_enabled, uint, S_IRUGO);
61MODULE_PARM_DESC(mq, "Enable multiqueue support. "
62 "[Default=" __stringify(IBMVFC_MQ) "]");
63module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO);
64MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. "
65 "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]");
66module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO);
67MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. "
68 "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]");
69module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO);
70MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. "
71 "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]");
72module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO);
73MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. "
74 "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]");
75
76module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR);
77MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. "
78 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]");
79module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR);
80MODULE_PARM_DESC(default_timeout,
81 "Default timeout in seconds for initialization and EH commands. "
82 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]");
83module_param_named(max_requests, max_requests, uint, S_IRUGO);
84MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. "
85 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]");
86module_param_named(max_lun, max_lun, ullong, S_IRUGO);
87MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. "
88 "[Default=" __stringify(IBMVFC_MAX_LUN) "]");
89module_param_named(max_targets, max_targets, uint, S_IRUGO);
90MODULE_PARM_DESC(max_targets, "Maximum allowed targets. "
91 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]");
92module_param_named(disc_threads, disc_threads, uint, S_IRUGO);
93MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
94 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]");
95module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
96MODULE_PARM_DESC(debug, "Enable driver debug information. "
97 "[Default=" __stringify(IBMVFC_DEBUG) "]");
98module_param_named(log_level, log_level, uint, 0);
99MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
100 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
101module_param_named(cls3_error, cls3_error, uint, 0);
102MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. "
103 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]");
104
105static const struct {
106 u16 status;
107 u16 error;
108 u8 result;
109 u8 retry;
110 int log;
111 char *name;
112} cmd_status [] = {
113 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" },
114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" },
115 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" },
116 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" },
117 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" },
118 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" },
119 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" },
120 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" },
121 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" },
122 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" },
123 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" },
124 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" },
125 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" },
126 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" },
127
128 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" },
129 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" },
130 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" },
131 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" },
132 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" },
133 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" },
134 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
135 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
136 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
137 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
138
139 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
140 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" },
141 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" },
142 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" },
143 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" },
144 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" },
145 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" },
146 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" },
147 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" },
148 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" },
149 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" },
150
151 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" },
152 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." },
153};
154
155static void ibmvfc_npiv_login(struct ibmvfc_host *);
156static void ibmvfc_tgt_send_prli(struct ibmvfc_target *);
157static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *);
158static void ibmvfc_tgt_query_target(struct ibmvfc_target *);
159static void ibmvfc_npiv_logout(struct ibmvfc_host *);
160static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *);
161static void ibmvfc_tgt_move_login(struct ibmvfc_target *);
162
163static void ibmvfc_release_sub_crqs(struct ibmvfc_host *);
164static void ibmvfc_init_sub_crqs(struct ibmvfc_host *);
165
166static const char *unknown_error = "unknown error";
167
168static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba,
169 unsigned long length, unsigned long *cookie,
170 unsigned long *irq)
171{
172 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
173 long rc;
174
175 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length);
176 *cookie = retbuf[0];
177 *irq = retbuf[1];
178
179 return rc;
180}
181
182static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags)
183{
184 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities);
185
186 return (host_caps & cap_flags) ? 1 : 0;
187}
188
189static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost,
190 struct ibmvfc_cmd *vfc_cmd)
191{
192 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
193 return &vfc_cmd->v2.iu;
194 else
195 return &vfc_cmd->v1.iu;
196}
197
198static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost,
199 struct ibmvfc_cmd *vfc_cmd)
200{
201 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
202 return &vfc_cmd->v2.rsp;
203 else
204 return &vfc_cmd->v1.rsp;
205}
206
207#ifdef CONFIG_SCSI_IBMVFC_TRACE
208
209
210
211
212
213static void ibmvfc_trc_start(struct ibmvfc_event *evt)
214{
215 struct ibmvfc_host *vhost = evt->vhost;
216 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
217 struct ibmvfc_mad_common *mad = &evt->iu.mad_common;
218 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
219 struct ibmvfc_trace_entry *entry;
220 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK;
221
222 entry = &vhost->trace[index];
223 entry->evt = evt;
224 entry->time = jiffies;
225 entry->fmt = evt->crq.format;
226 entry->type = IBMVFC_TRC_START;
227
228 switch (entry->fmt) {
229 case IBMVFC_CMD_FORMAT:
230 entry->op_code = iu->cdb[0];
231 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
232 entry->lun = scsilun_to_int(&iu->lun);
233 entry->tmf_flags = iu->tmf_flags;
234 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len);
235 break;
236 case IBMVFC_MAD_FORMAT:
237 entry->op_code = be32_to_cpu(mad->opcode);
238 break;
239 default:
240 break;
241 }
242}
243
244
245
246
247
248
249static void ibmvfc_trc_end(struct ibmvfc_event *evt)
250{
251 struct ibmvfc_host *vhost = evt->vhost;
252 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
253 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common;
254 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
255 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
256 struct ibmvfc_trace_entry *entry;
257 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK;
258
259 entry = &vhost->trace[index];
260 entry->evt = evt;
261 entry->time = jiffies;
262 entry->fmt = evt->crq.format;
263 entry->type = IBMVFC_TRC_END;
264
265 switch (entry->fmt) {
266 case IBMVFC_CMD_FORMAT:
267 entry->op_code = iu->cdb[0];
268 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id);
269 entry->lun = scsilun_to_int(&iu->lun);
270 entry->tmf_flags = iu->tmf_flags;
271 entry->u.end.status = be16_to_cpu(vfc_cmd->status);
272 entry->u.end.error = be16_to_cpu(vfc_cmd->error);
273 entry->u.end.fcp_rsp_flags = rsp->flags;
274 entry->u.end.rsp_code = rsp->data.info.rsp_code;
275 entry->u.end.scsi_status = rsp->scsi_status;
276 break;
277 case IBMVFC_MAD_FORMAT:
278 entry->op_code = be32_to_cpu(mad->opcode);
279 entry->u.end.status = be16_to_cpu(mad->status);
280 break;
281 default:
282 break;
283
284 }
285}
286
287#else
288#define ibmvfc_trc_start(evt) do { } while (0)
289#define ibmvfc_trc_end(evt) do { } while (0)
290#endif
291
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297
298
299
300static int ibmvfc_get_err_index(u16 status, u16 error)
301{
302 int i;
303
304 for (i = 0; i < ARRAY_SIZE(cmd_status); i++)
305 if ((cmd_status[i].status & status) == cmd_status[i].status &&
306 cmd_status[i].error == error)
307 return i;
308
309 return -EINVAL;
310}
311
312
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314
315
316
317
318
319
320static const char *ibmvfc_get_cmd_error(u16 status, u16 error)
321{
322 int rc = ibmvfc_get_err_index(status, error);
323 if (rc >= 0)
324 return cmd_status[rc].name;
325 return unknown_error;
326}
327
328
329
330
331
332
333
334
335
336static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd)
337{
338 int err;
339 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
340 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
341
342 if ((rsp->flags & FCP_RSP_LEN_VALID) &&
343 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) ||
344 rsp->data.info.rsp_code))
345 return DID_ERROR << 16;
346
347 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
348 if (err >= 0)
349 return rsp->scsi_status | (cmd_status[err].result << 16);
350 return rsp->scsi_status | (DID_ERROR << 16);
351}
352
353
354
355
356
357
358
359
360
361static int ibmvfc_retry_cmd(u16 status, u16 error)
362{
363 int rc = ibmvfc_get_err_index(status, error);
364
365 if (rc >= 0)
366 return cmd_status[rc].retry;
367 return 1;
368}
369
370static const char *unknown_fc_explain = "unknown fc explain";
371
372static const struct {
373 u16 fc_explain;
374 char *name;
375} ls_explain [] = {
376 { 0x00, "no additional explanation" },
377 { 0x01, "service parameter error - options" },
378 { 0x03, "service parameter error - initiator control" },
379 { 0x05, "service parameter error - recipient control" },
380 { 0x07, "service parameter error - received data field size" },
381 { 0x09, "service parameter error - concurrent seq" },
382 { 0x0B, "service parameter error - credit" },
383 { 0x0D, "invalid N_Port/F_Port_Name" },
384 { 0x0E, "invalid node/Fabric Name" },
385 { 0x0F, "invalid common service parameters" },
386 { 0x11, "invalid association header" },
387 { 0x13, "association header required" },
388 { 0x15, "invalid originator S_ID" },
389 { 0x17, "invalid OX_ID-RX-ID combination" },
390 { 0x19, "command (request) already in progress" },
391 { 0x1E, "N_Port Login requested" },
392 { 0x1F, "Invalid N_Port_ID" },
393};
394
395static const struct {
396 u16 fc_explain;
397 char *name;
398} gs_explain [] = {
399 { 0x00, "no additional explanation" },
400 { 0x01, "port identifier not registered" },
401 { 0x02, "port name not registered" },
402 { 0x03, "node name not registered" },
403 { 0x04, "class of service not registered" },
404 { 0x06, "initial process associator not registered" },
405 { 0x07, "FC-4 TYPEs not registered" },
406 { 0x08, "symbolic port name not registered" },
407 { 0x09, "symbolic node name not registered" },
408 { 0x0A, "port type not registered" },
409 { 0xF0, "authorization exception" },
410 { 0xF1, "authentication exception" },
411 { 0xF2, "data base full" },
412 { 0xF3, "data base empty" },
413 { 0xF4, "processing request" },
414 { 0xF5, "unable to verify connection" },
415 { 0xF6, "devices not in a common zone" },
416};
417
418
419
420
421
422
423
424
425static const char *ibmvfc_get_ls_explain(u16 status)
426{
427 int i;
428
429 for (i = 0; i < ARRAY_SIZE(ls_explain); i++)
430 if (ls_explain[i].fc_explain == status)
431 return ls_explain[i].name;
432
433 return unknown_fc_explain;
434}
435
436
437
438
439
440
441
442
443static const char *ibmvfc_get_gs_explain(u16 status)
444{
445 int i;
446
447 for (i = 0; i < ARRAY_SIZE(gs_explain); i++)
448 if (gs_explain[i].fc_explain == status)
449 return gs_explain[i].name;
450
451 return unknown_fc_explain;
452}
453
454static const struct {
455 enum ibmvfc_fc_type fc_type;
456 char *name;
457} fc_type [] = {
458 { IBMVFC_FABRIC_REJECT, "fabric reject" },
459 { IBMVFC_PORT_REJECT, "port reject" },
460 { IBMVFC_LS_REJECT, "ELS reject" },
461 { IBMVFC_FABRIC_BUSY, "fabric busy" },
462 { IBMVFC_PORT_BUSY, "port busy" },
463 { IBMVFC_BASIC_REJECT, "basic reject" },
464};
465
466static const char *unknown_fc_type = "unknown fc type";
467
468
469
470
471
472
473
474
475static const char *ibmvfc_get_fc_type(u16 status)
476{
477 int i;
478
479 for (i = 0; i < ARRAY_SIZE(fc_type); i++)
480 if (fc_type[i].fc_type == status)
481 return fc_type[i].name;
482
483 return unknown_fc_type;
484}
485
486
487
488
489
490
491
492
493
494static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
495 enum ibmvfc_target_action action)
496{
497 int rc = -EINVAL;
498
499 switch (tgt->action) {
500 case IBMVFC_TGT_ACTION_LOGOUT_RPORT:
501 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT ||
502 action == IBMVFC_TGT_ACTION_DEL_RPORT) {
503 tgt->action = action;
504 rc = 0;
505 }
506 break;
507 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT:
508 if (action == IBMVFC_TGT_ACTION_DEL_RPORT ||
509 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) {
510 tgt->action = action;
511 rc = 0;
512 }
513 break;
514 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT:
515 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) {
516 tgt->action = action;
517 rc = 0;
518 }
519 break;
520 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT:
521 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) {
522 tgt->action = action;
523 rc = 0;
524 }
525 break;
526 case IBMVFC_TGT_ACTION_DEL_RPORT:
527 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
528 tgt->action = action;
529 rc = 0;
530 }
531 break;
532 case IBMVFC_TGT_ACTION_DELETED_RPORT:
533 break;
534 default:
535 tgt->action = action;
536 rc = 0;
537 break;
538 }
539
540 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT)
541 tgt->add_rport = 0;
542
543 return rc;
544}
545
546
547
548
549
550
551
552
553
554static int ibmvfc_set_host_state(struct ibmvfc_host *vhost,
555 enum ibmvfc_host_state state)
556{
557 int rc = 0;
558
559 switch (vhost->state) {
560 case IBMVFC_HOST_OFFLINE:
561 rc = -EINVAL;
562 break;
563 default:
564 vhost->state = state;
565 break;
566 }
567
568 return rc;
569}
570
571
572
573
574
575
576
577static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
578 enum ibmvfc_host_action action)
579{
580 switch (action) {
581 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
582 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT)
583 vhost->action = action;
584 break;
585 case IBMVFC_HOST_ACTION_LOGO_WAIT:
586 if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
587 vhost->action = action;
588 break;
589 case IBMVFC_HOST_ACTION_INIT_WAIT:
590 if (vhost->action == IBMVFC_HOST_ACTION_INIT)
591 vhost->action = action;
592 break;
593 case IBMVFC_HOST_ACTION_QUERY:
594 switch (vhost->action) {
595 case IBMVFC_HOST_ACTION_INIT_WAIT:
596 case IBMVFC_HOST_ACTION_NONE:
597 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
598 vhost->action = action;
599 break;
600 default:
601 break;
602 }
603 break;
604 case IBMVFC_HOST_ACTION_TGT_INIT:
605 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
606 vhost->action = action;
607 break;
608 case IBMVFC_HOST_ACTION_REENABLE:
609 case IBMVFC_HOST_ACTION_RESET:
610 vhost->action = action;
611 break;
612 case IBMVFC_HOST_ACTION_INIT:
613 case IBMVFC_HOST_ACTION_TGT_DEL:
614 case IBMVFC_HOST_ACTION_LOGO:
615 case IBMVFC_HOST_ACTION_QUERY_TGTS:
616 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
617 case IBMVFC_HOST_ACTION_NONE:
618 default:
619 switch (vhost->action) {
620 case IBMVFC_HOST_ACTION_RESET:
621 case IBMVFC_HOST_ACTION_REENABLE:
622 break;
623 default:
624 vhost->action = action;
625 break;
626 }
627 break;
628 }
629}
630
631
632
633
634
635
636
637
638static void ibmvfc_reinit_host(struct ibmvfc_host *vhost)
639{
640 if (vhost->action == IBMVFC_HOST_ACTION_NONE &&
641 vhost->state == IBMVFC_ACTIVE) {
642 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
643 scsi_block_requests(vhost->host);
644 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
645 }
646 } else
647 vhost->reinit = 1;
648
649 wake_up(&vhost->work_wait_q);
650}
651
652
653
654
655
656static void ibmvfc_del_tgt(struct ibmvfc_target *tgt)
657{
658 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) {
659 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del;
660 tgt->init_retries = 0;
661 }
662 wake_up(&tgt->vhost->work_wait_q);
663}
664
665
666
667
668
669
670
671static void ibmvfc_link_down(struct ibmvfc_host *vhost,
672 enum ibmvfc_host_state state)
673{
674 struct ibmvfc_target *tgt;
675
676 ENTER;
677 scsi_block_requests(vhost->host);
678 list_for_each_entry(tgt, &vhost->targets, queue)
679 ibmvfc_del_tgt(tgt);
680 ibmvfc_set_host_state(vhost, state);
681 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
682 vhost->events_to_log |= IBMVFC_AE_LINKDOWN;
683 wake_up(&vhost->work_wait_q);
684 LEAVE;
685}
686
687
688
689
690
691
692
693
694static void ibmvfc_init_host(struct ibmvfc_host *vhost)
695{
696 struct ibmvfc_target *tgt;
697
698 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
699 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
700 dev_err(vhost->dev,
701 "Host initialization retries exceeded. Taking adapter offline\n");
702 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
703 return;
704 }
705 }
706
707 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
708 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE);
709 vhost->async_crq.cur = 0;
710
711 list_for_each_entry(tgt, &vhost->targets, queue)
712 ibmvfc_del_tgt(tgt);
713 scsi_block_requests(vhost->host);
714 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
715 vhost->job_step = ibmvfc_npiv_login;
716 wake_up(&vhost->work_wait_q);
717 }
718}
719
720
721
722
723
724
725
726
727
728
729static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
730{
731 struct vio_dev *vdev = to_vio_dev(vhost->dev);
732 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
733}
734
735static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1,
736 u64 word2, u64 word3, u64 word4)
737{
738 struct vio_dev *vdev = to_vio_dev(vhost->dev);
739
740 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie,
741 word1, word2, word3, word4);
742}
743
744
745
746
747
748
749
750
751static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost)
752{
753 ibmvfc_dbg(vhost, "Sending CRQ init\n");
754 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0);
755}
756
757
758
759
760
761
762
763
764static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
765{
766 ibmvfc_dbg(vhost, "Sending CRQ init complete\n");
767 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0);
768}
769
770
771
772
773
774
775
776
777
778static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost,
779 struct ibmvfc_queue *queue,
780 unsigned int size)
781{
782 int i;
783 struct ibmvfc_event_pool *pool = &queue->evt_pool;
784
785 ENTER;
786 if (!size)
787 return 0;
788
789 pool->size = size;
790 pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL);
791 if (!pool->events)
792 return -ENOMEM;
793
794 pool->iu_storage = dma_alloc_coherent(vhost->dev,
795 size * sizeof(*pool->iu_storage),
796 &pool->iu_token, 0);
797
798 if (!pool->iu_storage) {
799 kfree(pool->events);
800 return -ENOMEM;
801 }
802
803 INIT_LIST_HEAD(&queue->sent);
804 INIT_LIST_HEAD(&queue->free);
805 spin_lock_init(&queue->l_lock);
806
807 for (i = 0; i < size; ++i) {
808 struct ibmvfc_event *evt = &pool->events[i];
809
810
811
812
813
814
815
816 atomic_set(&evt->active, -1);
817 atomic_set(&evt->free, 1);
818 evt->crq.valid = 0x80;
819 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i));
820 evt->xfer_iu = pool->iu_storage + i;
821 evt->vhost = vhost;
822 evt->queue = queue;
823 evt->ext_list = NULL;
824 list_add_tail(&evt->queue_list, &queue->free);
825 }
826
827 LEAVE;
828 return 0;
829}
830
831
832
833
834
835
836
837static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost,
838 struct ibmvfc_queue *queue)
839{
840 int i;
841 struct ibmvfc_event_pool *pool = &queue->evt_pool;
842
843 ENTER;
844 for (i = 0; i < pool->size; ++i) {
845 list_del(&pool->events[i].queue_list);
846 BUG_ON(atomic_read(&pool->events[i].free) != 1);
847 if (pool->events[i].ext_list)
848 dma_pool_free(vhost->sg_pool,
849 pool->events[i].ext_list,
850 pool->events[i].ext_list_token);
851 }
852
853 kfree(pool->events);
854 dma_free_coherent(vhost->dev,
855 pool->size * sizeof(*pool->iu_storage),
856 pool->iu_storage, pool->iu_token);
857 LEAVE;
858}
859
860
861
862
863
864
865
866
867static void ibmvfc_free_queue(struct ibmvfc_host *vhost,
868 struct ibmvfc_queue *queue)
869{
870 struct device *dev = vhost->dev;
871
872 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
873 free_page((unsigned long)queue->msgs.handle);
874 queue->msgs.handle = NULL;
875
876 ibmvfc_free_event_pool(vhost, queue);
877}
878
879
880
881
882
883
884
885
886static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
887{
888 long rc = 0;
889 struct vio_dev *vdev = to_vio_dev(vhost->dev);
890 struct ibmvfc_queue *crq = &vhost->crq;
891
892 ibmvfc_dbg(vhost, "Releasing CRQ\n");
893 free_irq(vdev->irq, vhost);
894 tasklet_kill(&vhost->tasklet);
895 do {
896 if (rc)
897 msleep(100);
898 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
899 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
900
901 vhost->state = IBMVFC_NO_CRQ;
902 vhost->logged_in = 0;
903
904 ibmvfc_free_queue(vhost, crq);
905}
906
907
908
909
910
911
912
913
914static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
915{
916 int rc = 0;
917 struct vio_dev *vdev = to_vio_dev(vhost->dev);
918 unsigned long flags;
919
920 ibmvfc_release_sub_crqs(vhost);
921
922
923 do {
924 if (rc)
925 msleep(100);
926 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
927 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
928
929 if (rc)
930 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc);
931
932 spin_lock_irqsave(vhost->host->host_lock, flags);
933 spin_lock(vhost->crq.q_lock);
934 vhost->do_enquiry = 1;
935 vhost->using_channels = 0;
936 spin_unlock(vhost->crq.q_lock);
937 spin_unlock_irqrestore(vhost->host->host_lock, flags);
938
939 ibmvfc_init_sub_crqs(vhost);
940
941 return rc;
942}
943
944
945
946
947
948
949
950
951static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
952{
953 int rc = 0;
954 unsigned long flags;
955 struct vio_dev *vdev = to_vio_dev(vhost->dev);
956 struct ibmvfc_queue *crq = &vhost->crq;
957
958 ibmvfc_release_sub_crqs(vhost);
959
960
961 do {
962 if (rc)
963 msleep(100);
964 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
965 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
966
967 spin_lock_irqsave(vhost->host->host_lock, flags);
968 spin_lock(vhost->crq.q_lock);
969 vhost->state = IBMVFC_NO_CRQ;
970 vhost->logged_in = 0;
971 vhost->do_enquiry = 1;
972 vhost->using_channels = 0;
973
974
975 memset(crq->msgs.crq, 0, PAGE_SIZE);
976 crq->cur = 0;
977
978
979 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
980 crq->msg_token, PAGE_SIZE);
981
982 if (rc == H_CLOSED)
983
984 dev_warn(vhost->dev, "Partner adapter not ready\n");
985 else if (rc != 0)
986 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
987
988 spin_unlock(vhost->crq.q_lock);
989 spin_unlock_irqrestore(vhost->host->host_lock, flags);
990
991 ibmvfc_init_sub_crqs(vhost);
992
993 return rc;
994}
995
996
997
998
999
1000
1001
1002
1003
1004static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool,
1005 struct ibmvfc_event *evt)
1006{
1007 int index = evt - pool->events;
1008 if (index < 0 || index >= pool->size)
1009 return 0;
1010 if (evt != pool->events + index)
1011 return 0;
1012 return 1;
1013}
1014
1015
1016
1017
1018
1019
1020static void ibmvfc_free_event(struct ibmvfc_event *evt)
1021{
1022 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool;
1023 unsigned long flags;
1024
1025 BUG_ON(!ibmvfc_valid_event(pool, evt));
1026 BUG_ON(atomic_inc_return(&evt->free) != 1);
1027 BUG_ON(atomic_dec_and_test(&evt->active));
1028
1029 spin_lock_irqsave(&evt->queue->l_lock, flags);
1030 list_add_tail(&evt->queue_list, &evt->queue->free);
1031 if (evt->eh_comp)
1032 complete(evt->eh_comp);
1033 spin_unlock_irqrestore(&evt->queue->l_lock, flags);
1034}
1035
1036
1037
1038
1039
1040
1041
1042
1043static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
1044{
1045 struct scsi_cmnd *cmnd = evt->cmnd;
1046
1047 if (cmnd) {
1048 scsi_dma_unmap(cmnd);
1049 cmnd->scsi_done(cmnd);
1050 }
1051
1052 ibmvfc_free_event(evt);
1053}
1054
1055
1056
1057
1058
1059
1060
1061
1062static void ibmvfc_complete_purge(struct list_head *purge_list)
1063{
1064 struct ibmvfc_event *evt, *pos;
1065
1066 list_for_each_entry_safe(evt, pos, purge_list, queue_list) {
1067 list_del(&evt->queue_list);
1068 ibmvfc_trc_end(evt);
1069 evt->done(evt);
1070 }
1071}
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
1082{
1083
1084
1085
1086
1087
1088 BUG_ON(!atomic_dec_and_test(&evt->active));
1089 if (evt->cmnd) {
1090 evt->cmnd->result = (error_code << 16);
1091 evt->done = ibmvfc_scsi_eh_done;
1092 } else
1093 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED);
1094
1095 del_timer(&evt->timer);
1096}
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
1107{
1108 struct ibmvfc_event *evt, *pos;
1109 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs;
1110 unsigned long flags;
1111 int hwqs = 0;
1112 int i;
1113
1114 if (vhost->using_channels)
1115 hwqs = vhost->scsi_scrqs.active_queues;
1116
1117 ibmvfc_dbg(vhost, "Purging all requests\n");
1118 spin_lock_irqsave(&vhost->crq.l_lock, flags);
1119 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list)
1120 ibmvfc_fail_request(evt, error_code);
1121 list_splice_init(&vhost->crq.sent, &vhost->purge);
1122 spin_unlock_irqrestore(&vhost->crq.l_lock, flags);
1123
1124 for (i = 0; i < hwqs; i++) {
1125 spin_lock_irqsave(queues[i].q_lock, flags);
1126 spin_lock(&queues[i].l_lock);
1127 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list)
1128 ibmvfc_fail_request(evt, error_code);
1129 list_splice_init(&queues[i].sent, &vhost->purge);
1130 spin_unlock(&queues[i].l_lock);
1131 spin_unlock_irqrestore(queues[i].q_lock, flags);
1132 }
1133}
1134
1135
1136
1137
1138
1139static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
1140{
1141 ibmvfc_purge_requests(vhost, DID_ERROR);
1142 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
1143 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
1144}
1145
1146
1147
1148
1149
1150static void __ibmvfc_reset_host(struct ibmvfc_host *vhost)
1151{
1152 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
1153 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
1154 scsi_block_requests(vhost->host);
1155 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
1156 vhost->job_step = ibmvfc_npiv_logout;
1157 wake_up(&vhost->work_wait_q);
1158 } else
1159 ibmvfc_hard_reset_host(vhost);
1160}
1161
1162
1163
1164
1165
1166static void ibmvfc_reset_host(struct ibmvfc_host *vhost)
1167{
1168 unsigned long flags;
1169
1170 spin_lock_irqsave(vhost->host->host_lock, flags);
1171 __ibmvfc_reset_host(vhost);
1172 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1173}
1174
1175
1176
1177
1178
1179
1180
1181
1182static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
1183{
1184 int retry = 0;
1185
1186 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
1187 vhost->delay_init = 1;
1188 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) {
1189 dev_err(vhost->dev,
1190 "Host initialization retries exceeded. Taking adapter offline\n");
1191 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
1192 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES)
1193 __ibmvfc_reset_host(vhost);
1194 else {
1195 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
1196 retry = 1;
1197 }
1198 }
1199
1200 wake_up(&vhost->work_wait_q);
1201 return retry;
1202}
1203
1204
1205
1206
1207
1208
1209
1210
1211static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget)
1212{
1213 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1214 struct ibmvfc_host *vhost = shost_priv(shost);
1215 struct ibmvfc_target *tgt;
1216
1217 list_for_each_entry(tgt, &vhost->targets, queue)
1218 if (tgt->target_id == starget->id) {
1219 kref_get(&tgt->kref);
1220 return tgt;
1221 }
1222 return NULL;
1223}
1224
1225
1226
1227
1228
1229
1230
1231
1232static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget)
1233{
1234 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1235 struct ibmvfc_target *tgt;
1236 unsigned long flags;
1237
1238 spin_lock_irqsave(shost->host_lock, flags);
1239 tgt = __ibmvfc_get_target(starget);
1240 spin_unlock_irqrestore(shost->host_lock, flags);
1241 return tgt;
1242}
1243
1244
1245
1246
1247
1248
1249
1250
1251static void ibmvfc_get_host_speed(struct Scsi_Host *shost)
1252{
1253 struct ibmvfc_host *vhost = shost_priv(shost);
1254 unsigned long flags;
1255
1256 spin_lock_irqsave(shost->host_lock, flags);
1257 if (vhost->state == IBMVFC_ACTIVE) {
1258 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) {
1259 case 1:
1260 fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
1261 break;
1262 case 2:
1263 fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
1264 break;
1265 case 4:
1266 fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
1267 break;
1268 case 8:
1269 fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
1270 break;
1271 case 10:
1272 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
1273 break;
1274 case 16:
1275 fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
1276 break;
1277 default:
1278 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n",
1279 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100);
1280 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1281 break;
1282 }
1283 } else
1284 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
1285 spin_unlock_irqrestore(shost->host_lock, flags);
1286}
1287
1288
1289
1290
1291
1292
1293
1294
1295static void ibmvfc_get_host_port_state(struct Scsi_Host *shost)
1296{
1297 struct ibmvfc_host *vhost = shost_priv(shost);
1298 unsigned long flags;
1299
1300 spin_lock_irqsave(shost->host_lock, flags);
1301 switch (vhost->state) {
1302 case IBMVFC_INITIALIZING:
1303 case IBMVFC_ACTIVE:
1304 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
1305 break;
1306 case IBMVFC_LINK_DOWN:
1307 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
1308 break;
1309 case IBMVFC_LINK_DEAD:
1310 case IBMVFC_HOST_OFFLINE:
1311 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
1312 break;
1313 case IBMVFC_HALTED:
1314 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED;
1315 break;
1316 case IBMVFC_NO_CRQ:
1317 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1318 break;
1319 default:
1320 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state);
1321 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
1322 break;
1323 }
1324 spin_unlock_irqrestore(shost->host_lock, flags);
1325}
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
1336{
1337 if (timeout)
1338 rport->dev_loss_tmo = timeout;
1339 else
1340 rport->dev_loss_tmo = 1;
1341}
1342
1343
1344
1345
1346
1347
1348static void ibmvfc_release_tgt(struct kref *kref)
1349{
1350 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref);
1351 kfree(tgt);
1352}
1353
1354
1355
1356
1357
1358
1359
1360
1361static void ibmvfc_get_starget_node_name(struct scsi_target *starget)
1362{
1363 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1364 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0;
1365 if (tgt)
1366 kref_put(&tgt->kref, ibmvfc_release_tgt);
1367}
1368
1369
1370
1371
1372
1373
1374
1375
1376static void ibmvfc_get_starget_port_name(struct scsi_target *starget)
1377{
1378 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1379 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0;
1380 if (tgt)
1381 kref_put(&tgt->kref, ibmvfc_release_tgt);
1382}
1383
1384
1385
1386
1387
1388
1389
1390
1391static void ibmvfc_get_starget_port_id(struct scsi_target *starget)
1392{
1393 struct ibmvfc_target *tgt = ibmvfc_get_target(starget);
1394 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1;
1395 if (tgt)
1396 kref_put(&tgt->kref, ibmvfc_release_tgt);
1397}
1398
1399
1400
1401
1402
1403
1404
1405
1406static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost)
1407{
1408 long timeout = wait_event_timeout(vhost->init_wait_q,
1409 ((vhost->state == IBMVFC_ACTIVE ||
1410 vhost->state == IBMVFC_HOST_OFFLINE ||
1411 vhost->state == IBMVFC_LINK_DEAD) &&
1412 vhost->action == IBMVFC_HOST_ACTION_NONE),
1413 (init_timeout * HZ));
1414
1415 return timeout ? 0 : -EIO;
1416}
1417
1418
1419
1420
1421
1422
1423
1424
1425static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost)
1426{
1427 struct ibmvfc_host *vhost = shost_priv(shost);
1428
1429 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n");
1430 ibmvfc_reset_host(vhost);
1431 return ibmvfc_wait_while_resetting(vhost);
1432}
1433
1434
1435
1436
1437
1438
1439
1440
1441static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost)
1442{
1443 struct device_node *rootdn;
1444 const char *name;
1445 const unsigned int *num;
1446
1447 rootdn = of_find_node_by_path("/");
1448 if (!rootdn)
1449 return;
1450
1451 name = of_get_property(rootdn, "ibm,partition-name", NULL);
1452 if (name)
1453 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name));
1454 num = of_get_property(rootdn, "ibm,partition-no", NULL);
1455 if (num)
1456 vhost->partition_number = *num;
1457 of_node_put(rootdn);
1458}
1459
1460
1461
1462
1463
1464
1465
1466
1467static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
1468{
1469 struct ibmvfc_npiv_login *login_info = &vhost->login_info;
1470 struct ibmvfc_queue *async_crq = &vhost->async_crq;
1471 struct device_node *of_node = vhost->dev->of_node;
1472 const char *location;
1473
1474 memset(login_info, 0, sizeof(*login_info));
1475
1476 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX);
1477 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9);
1478 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu));
1479 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp));
1480 login_info->partition_num = cpu_to_be32(vhost->partition_number);
1481 login_info->vfc_frame_version = cpu_to_be32(1);
1482 login_info->fcp_version = cpu_to_be16(3);
1483 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT);
1484 if (vhost->client_migrated)
1485 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED);
1486
1487 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
1488 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN);
1489
1490 if (vhost->mq_enabled || vhost->using_channels)
1491 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS);
1492
1493 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
1494 login_info->async.len = cpu_to_be32(async_crq->size *
1495 sizeof(*async_crq->msgs.async));
1496 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME);
1497 strncpy(login_info->device_name,
1498 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
1499
1500 location = of_get_property(of_node, "ibm,loc-code", NULL);
1501 location = location ? location : dev_name(vhost->dev);
1502 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME);
1503}
1504
1505
1506
1507
1508
1509
1510
1511static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue)
1512{
1513 struct ibmvfc_event *evt;
1514 unsigned long flags;
1515
1516 spin_lock_irqsave(&queue->l_lock, flags);
1517 BUG_ON(list_empty(&queue->free));
1518 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list);
1519 atomic_set(&evt->free, 0);
1520 list_del(&evt->queue_list);
1521 spin_unlock_irqrestore(&queue->l_lock, flags);
1522 return evt;
1523}
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533static void ibmvfc_locked_done(struct ibmvfc_event *evt)
1534{
1535 unsigned long flags;
1536
1537 spin_lock_irqsave(evt->vhost->host->host_lock, flags);
1538 evt->_done(evt);
1539 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags);
1540}
1541
1542
1543
1544
1545
1546
1547
1548
1549static void ibmvfc_init_event(struct ibmvfc_event *evt,
1550 void (*done) (struct ibmvfc_event *), u8 format)
1551{
1552 evt->cmnd = NULL;
1553 evt->sync_iu = NULL;
1554 evt->eh_comp = NULL;
1555 evt->crq.format = format;
1556 if (format == IBMVFC_CMD_FORMAT)
1557 evt->done = done;
1558 else {
1559 evt->_done = done;
1560 evt->done = ibmvfc_locked_done;
1561 }
1562 evt->hwq = 0;
1563}
1564
1565
1566
1567
1568
1569
1570
1571static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg,
1572 struct srp_direct_buf *md)
1573{
1574 int i;
1575 struct scatterlist *sg;
1576
1577 scsi_for_each_sg(scmd, sg, nseg, i) {
1578 md[i].va = cpu_to_be64(sg_dma_address(sg));
1579 md[i].len = cpu_to_be32(sg_dma_len(sg));
1580 md[i].key = 0;
1581 }
1582}
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd,
1595 struct ibmvfc_event *evt,
1596 struct ibmvfc_cmd *vfc_cmd, struct device *dev)
1597{
1598
1599 int sg_mapped;
1600 struct srp_direct_buf *data = &vfc_cmd->ioba;
1601 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
1602 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd);
1603
1604 if (cls3_error)
1605 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR);
1606
1607 sg_mapped = scsi_dma_map(scmd);
1608 if (!sg_mapped) {
1609 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC);
1610 return 0;
1611 } else if (unlikely(sg_mapped < 0)) {
1612 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1613 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n");
1614 return sg_mapped;
1615 }
1616
1617 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
1618 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE);
1619 iu->add_cdb_len |= IBMVFC_WRDATA;
1620 } else {
1621 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ);
1622 iu->add_cdb_len |= IBMVFC_RDDATA;
1623 }
1624
1625 if (sg_mapped == 1) {
1626 ibmvfc_map_sg_list(scmd, sg_mapped, data);
1627 return 0;
1628 }
1629
1630 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST);
1631
1632 if (!evt->ext_list) {
1633 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC,
1634 &evt->ext_list_token);
1635
1636 if (!evt->ext_list) {
1637 scsi_dma_unmap(scmd);
1638 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1639 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n");
1640 return -ENOMEM;
1641 }
1642 }
1643
1644 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list);
1645
1646 data->va = cpu_to_be64(evt->ext_list_token);
1647 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf));
1648 data->key = 0;
1649 return 0;
1650}
1651
1652
1653
1654
1655
1656
1657
1658static void ibmvfc_timeout(struct timer_list *t)
1659{
1660 struct ibmvfc_event *evt = from_timer(evt, t, timer);
1661 struct ibmvfc_host *vhost = evt->vhost;
1662 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt);
1663 ibmvfc_reset_host(vhost);
1664}
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674static int ibmvfc_send_event(struct ibmvfc_event *evt,
1675 struct ibmvfc_host *vhost, unsigned long timeout)
1676{
1677 __be64 *crq_as_u64 = (__be64 *) &evt->crq;
1678 unsigned long flags;
1679 int rc;
1680
1681
1682 *evt->xfer_iu = evt->iu;
1683 if (evt->crq.format == IBMVFC_CMD_FORMAT)
1684 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt);
1685 else if (evt->crq.format == IBMVFC_MAD_FORMAT)
1686 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt);
1687 else
1688 BUG();
1689
1690 timer_setup(&evt->timer, ibmvfc_timeout, 0);
1691
1692 if (timeout) {
1693 evt->timer.expires = jiffies + (timeout * HZ);
1694 add_timer(&evt->timer);
1695 }
1696
1697 spin_lock_irqsave(&evt->queue->l_lock, flags);
1698 list_add_tail(&evt->queue_list, &evt->queue->sent);
1699
1700 mb();
1701
1702 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT)
1703 rc = ibmvfc_send_sub_crq(vhost,
1704 evt->queue->vios_cookie,
1705 be64_to_cpu(crq_as_u64[0]),
1706 be64_to_cpu(crq_as_u64[1]),
1707 0, 0);
1708 else
1709 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
1710 be64_to_cpu(crq_as_u64[1]));
1711
1712 if (rc) {
1713 list_del(&evt->queue_list);
1714 spin_unlock_irqrestore(&evt->queue->l_lock, flags);
1715 del_timer(&evt->timer);
1716
1717
1718
1719
1720
1721
1722 if (rc == H_CLOSED) {
1723 if (printk_ratelimit())
1724 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n");
1725 if (evt->cmnd)
1726 scsi_dma_unmap(evt->cmnd);
1727 ibmvfc_free_event(evt);
1728 return SCSI_MLQUEUE_HOST_BUSY;
1729 }
1730
1731 dev_err(vhost->dev, "Send error (rc=%d)\n", rc);
1732 if (evt->cmnd) {
1733 evt->cmnd->result = DID_ERROR << 16;
1734 evt->done = ibmvfc_scsi_eh_done;
1735 } else
1736 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR);
1737
1738 evt->done(evt);
1739 } else {
1740 atomic_set(&evt->active, 1);
1741 spin_unlock_irqrestore(&evt->queue->l_lock, flags);
1742 ibmvfc_trc_start(evt);
1743 }
1744
1745 return 0;
1746}
1747
1748
1749
1750
1751
1752
1753static void ibmvfc_log_error(struct ibmvfc_event *evt)
1754{
1755 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1756 struct ibmvfc_host *vhost = evt->vhost;
1757 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
1758 struct scsi_cmnd *cmnd = evt->cmnd;
1759 const char *err = unknown_error;
1760 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error));
1761 int logerr = 0;
1762 int rsp_code = 0;
1763
1764 if (index >= 0) {
1765 logerr = cmd_status[index].log;
1766 err = cmd_status[index].name;
1767 }
1768
1769 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1)))
1770 return;
1771
1772 if (rsp->flags & FCP_RSP_LEN_VALID)
1773 rsp_code = rsp->data.info.rsp_code;
1774
1775 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) "
1776 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n",
1777 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error),
1778 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status);
1779}
1780
1781
1782
1783
1784
1785
1786static void ibmvfc_relogin(struct scsi_device *sdev)
1787{
1788 struct ibmvfc_host *vhost = shost_priv(sdev->host);
1789 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1790 struct ibmvfc_target *tgt;
1791 unsigned long flags;
1792
1793 spin_lock_irqsave(vhost->host->host_lock, flags);
1794 list_for_each_entry(tgt, &vhost->targets, queue) {
1795 if (rport == tgt->rport) {
1796 ibmvfc_del_tgt(tgt);
1797 break;
1798 }
1799 }
1800
1801 ibmvfc_reinit_host(vhost);
1802 spin_unlock_irqrestore(vhost->host->host_lock, flags);
1803}
1804
1805
1806
1807
1808
1809
1810
1811static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
1812{
1813 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd;
1814 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd);
1815 struct scsi_cmnd *cmnd = evt->cmnd;
1816 u32 rsp_len = 0;
1817 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len);
1818
1819 if (cmnd) {
1820 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID)
1821 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid));
1822 else if (rsp->flags & FCP_RESID_UNDER)
1823 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid));
1824 else
1825 scsi_set_resid(cmnd, 0);
1826
1827 if (vfc_cmd->status) {
1828 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd);
1829
1830 if (rsp->flags & FCP_RSP_LEN_VALID)
1831 rsp_len = be32_to_cpu(rsp->fcp_rsp_len);
1832 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE)
1833 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
1834 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
1835 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
1836 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) &&
1837 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED))
1838 ibmvfc_relogin(cmnd->device);
1839
1840 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
1841 cmnd->result = (DID_ERROR << 16);
1842
1843 ibmvfc_log_error(evt);
1844 }
1845
1846 if (!cmnd->result &&
1847 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow))
1848 cmnd->result = (DID_ERROR << 16);
1849
1850 scsi_dma_unmap(cmnd);
1851 cmnd->scsi_done(cmnd);
1852 }
1853
1854 ibmvfc_free_event(evt);
1855}
1856
1857
1858
1859
1860
1861
1862
1863
1864static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost)
1865{
1866 int result = 0;
1867
1868 switch (vhost->state) {
1869 case IBMVFC_LINK_DEAD:
1870 case IBMVFC_HOST_OFFLINE:
1871 result = DID_NO_CONNECT << 16;
1872 break;
1873 case IBMVFC_NO_CRQ:
1874 case IBMVFC_INITIALIZING:
1875 case IBMVFC_HALTED:
1876 case IBMVFC_LINK_DOWN:
1877 result = DID_REQUEUE << 16;
1878 break;
1879 case IBMVFC_ACTIVE:
1880 result = 0;
1881 break;
1882 }
1883
1884 return result;
1885}
1886
1887static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev)
1888{
1889 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1890 struct ibmvfc_host *vhost = evt->vhost;
1891 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd;
1892 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
1893 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd);
1894 size_t offset;
1895
1896 memset(vfc_cmd, 0, sizeof(*vfc_cmd));
1897 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
1898 offset = offsetof(struct ibmvfc_cmd, v2.rsp);
1899 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name);
1900 } else
1901 offset = offsetof(struct ibmvfc_cmd, v1.rsp);
1902 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset);
1903 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp));
1904 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE);
1905 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu));
1906 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp));
1907 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
1908 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id);
1909 int_to_scsilun(sdev->lun, &iu->lun);
1910
1911 return vfc_cmd;
1912}
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
1923{
1924 struct ibmvfc_host *vhost = shost_priv(shost);
1925 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1926 struct ibmvfc_cmd *vfc_cmd;
1927 struct ibmvfc_fcp_cmd_iu *iu;
1928 struct ibmvfc_event *evt;
1929 u32 tag_and_hwq = blk_mq_unique_tag(cmnd->request);
1930 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq);
1931 u16 scsi_channel;
1932 int rc;
1933
1934 if (unlikely((rc = fc_remote_port_chkready(rport))) ||
1935 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
1936 cmnd->result = rc;
1937 cmnd->scsi_done(cmnd);
1938 return 0;
1939 }
1940
1941 cmnd->result = (DID_OK << 16);
1942 if (vhost->using_channels) {
1943 scsi_channel = hwq % vhost->scsi_scrqs.active_queues;
1944 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]);
1945 evt->hwq = hwq % vhost->scsi_scrqs.active_queues;
1946 } else
1947 evt = ibmvfc_get_event(&vhost->crq);
1948
1949 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
1950 evt->cmnd = cmnd;
1951
1952 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device);
1953 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd);
1954
1955 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd));
1956 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len);
1957
1958 if (cmnd->flags & SCMD_TAGGED) {
1959 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag);
1960 iu->pri_task_attr = IBMVFC_SIMPLE_TASK;
1961 }
1962
1963 vfc_cmd->correlation = cpu_to_be64((u64)evt);
1964
1965 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
1966 return ibmvfc_send_event(evt, vhost, 0);
1967
1968 ibmvfc_free_event(evt);
1969 if (rc == -ENOMEM)
1970 return SCSI_MLQUEUE_HOST_BUSY;
1971
1972 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
1973 scmd_printk(KERN_ERR, cmnd,
1974 "Failed to map DMA buffer for command. rc=%d\n", rc);
1975
1976 cmnd->result = DID_ERROR << 16;
1977 cmnd->scsi_done(cmnd);
1978 return 0;
1979}
1980
1981
1982
1983
1984
1985
1986static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
1987{
1988
1989 if (evt->sync_iu)
1990 *evt->sync_iu = *evt->xfer_iu;
1991
1992 complete(&evt->comp);
1993}
1994
1995
1996
1997
1998
1999
2000static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
2001{
2002 struct ibmvfc_host *vhost = evt->vhost;
2003
2004 ibmvfc_free_event(evt);
2005 vhost->aborting_passthru = 0;
2006 dev_info(vhost->dev, "Passthru command cancelled\n");
2007}
2008
2009
2010
2011
2012
2013
2014
2015
2016static int ibmvfc_bsg_timeout(struct bsg_job *job)
2017{
2018 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
2019 unsigned long port_id = (unsigned long)job->dd_data;
2020 struct ibmvfc_event *evt;
2021 struct ibmvfc_tmf *tmf;
2022 unsigned long flags;
2023 int rc;
2024
2025 ENTER;
2026 spin_lock_irqsave(vhost->host->host_lock, flags);
2027 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
2028 __ibmvfc_reset_host(vhost);
2029 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2030 return 0;
2031 }
2032
2033 vhost->aborting_passthru = 1;
2034 evt = ibmvfc_get_event(&vhost->crq);
2035 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
2036
2037 tmf = &evt->iu.tmf;
2038 memset(tmf, 0, sizeof(*tmf));
2039 tmf->common.version = cpu_to_be32(1);
2040 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2041 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2042 tmf->scsi_id = cpu_to_be64(port_id);
2043 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
2044 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY);
2045 rc = ibmvfc_send_event(evt, vhost, default_timeout);
2046
2047 if (rc != 0) {
2048 vhost->aborting_passthru = 0;
2049 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
2050 rc = -EIO;
2051 } else
2052 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
2053 port_id);
2054
2055 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2056
2057 LEAVE;
2058 return rc;
2059}
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
2070{
2071 struct ibmvfc_port_login *plogi;
2072 struct ibmvfc_target *tgt;
2073 struct ibmvfc_event *evt;
2074 union ibmvfc_iu rsp_iu;
2075 unsigned long flags;
2076 int rc = 0, issue_login = 1;
2077
2078 ENTER;
2079 spin_lock_irqsave(vhost->host->host_lock, flags);
2080 list_for_each_entry(tgt, &vhost->targets, queue) {
2081 if (tgt->scsi_id == port_id) {
2082 issue_login = 0;
2083 break;
2084 }
2085 }
2086
2087 if (!issue_login)
2088 goto unlock_out;
2089 if (unlikely((rc = ibmvfc_host_chkready(vhost))))
2090 goto unlock_out;
2091
2092 evt = ibmvfc_get_event(&vhost->crq);
2093 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2094 plogi = &evt->iu.plogi;
2095 memset(plogi, 0, sizeof(*plogi));
2096 plogi->common.version = cpu_to_be32(1);
2097 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
2098 plogi->common.length = cpu_to_be16(sizeof(*plogi));
2099 plogi->scsi_id = cpu_to_be64(port_id);
2100 evt->sync_iu = &rsp_iu;
2101 init_completion(&evt->comp);
2102
2103 rc = ibmvfc_send_event(evt, vhost, default_timeout);
2104 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2105
2106 if (rc)
2107 return -EIO;
2108
2109 wait_for_completion(&evt->comp);
2110
2111 if (rsp_iu.plogi.common.status)
2112 rc = -EIO;
2113
2114 spin_lock_irqsave(vhost->host->host_lock, flags);
2115 ibmvfc_free_event(evt);
2116unlock_out:
2117 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2118 LEAVE;
2119 return rc;
2120}
2121
2122
2123
2124
2125
2126
2127
2128
2129static int ibmvfc_bsg_request(struct bsg_job *job)
2130{
2131 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job));
2132 struct fc_rport *rport = fc_bsg_to_rport(job);
2133 struct ibmvfc_passthru_mad *mad;
2134 struct ibmvfc_event *evt;
2135 union ibmvfc_iu rsp_iu;
2136 unsigned long flags, port_id = -1;
2137 struct fc_bsg_request *bsg_request = job->request;
2138 struct fc_bsg_reply *bsg_reply = job->reply;
2139 unsigned int code = bsg_request->msgcode;
2140 int rc = 0, req_seg, rsp_seg, issue_login = 0;
2141 u32 fc_flags, rsp_len;
2142
2143 ENTER;
2144 bsg_reply->reply_payload_rcv_len = 0;
2145 if (rport)
2146 port_id = rport->port_id;
2147
2148 switch (code) {
2149 case FC_BSG_HST_ELS_NOLOGIN:
2150 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
2151 (bsg_request->rqst_data.h_els.port_id[1] << 8) |
2152 bsg_request->rqst_data.h_els.port_id[2];
2153 fallthrough;
2154 case FC_BSG_RPT_ELS:
2155 fc_flags = IBMVFC_FC_ELS;
2156 break;
2157 case FC_BSG_HST_CT:
2158 issue_login = 1;
2159 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
2160 (bsg_request->rqst_data.h_ct.port_id[1] << 8) |
2161 bsg_request->rqst_data.h_ct.port_id[2];
2162 fallthrough;
2163 case FC_BSG_RPT_CT:
2164 fc_flags = IBMVFC_FC_CT_IU;
2165 break;
2166 default:
2167 return -ENOTSUPP;
2168 }
2169
2170 if (port_id == -1)
2171 return -EINVAL;
2172 if (!mutex_trylock(&vhost->passthru_mutex))
2173 return -EBUSY;
2174
2175 job->dd_data = (void *)port_id;
2176 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
2177 job->request_payload.sg_cnt, DMA_TO_DEVICE);
2178
2179 if (!req_seg) {
2180 mutex_unlock(&vhost->passthru_mutex);
2181 return -ENOMEM;
2182 }
2183
2184 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
2185 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
2186
2187 if (!rsp_seg) {
2188 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
2189 job->request_payload.sg_cnt, DMA_TO_DEVICE);
2190 mutex_unlock(&vhost->passthru_mutex);
2191 return -ENOMEM;
2192 }
2193
2194 if (req_seg > 1 || rsp_seg > 1) {
2195 rc = -EINVAL;
2196 goto out;
2197 }
2198
2199 if (issue_login)
2200 rc = ibmvfc_bsg_plogi(vhost, port_id);
2201
2202 spin_lock_irqsave(vhost->host->host_lock, flags);
2203
2204 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
2205 unlikely((rc = ibmvfc_host_chkready(vhost)))) {
2206 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2207 goto out;
2208 }
2209
2210 evt = ibmvfc_get_event(&vhost->crq);
2211 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2212 mad = &evt->iu.passthru;
2213
2214 memset(mad, 0, sizeof(*mad));
2215 mad->common.version = cpu_to_be32(1);
2216 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
2217 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
2218
2219 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) +
2220 offsetof(struct ibmvfc_passthru_mad, iu));
2221 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
2222
2223 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len);
2224 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len);
2225 mad->iu.flags = cpu_to_be32(fc_flags);
2226 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY);
2227
2228 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list));
2229 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list));
2230 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list));
2231 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list));
2232 mad->iu.scsi_id = cpu_to_be64(port_id);
2233 mad->iu.tag = cpu_to_be64((u64)evt);
2234 rsp_len = be32_to_cpu(mad->iu.rsp.len);
2235
2236 evt->sync_iu = &rsp_iu;
2237 init_completion(&evt->comp);
2238 rc = ibmvfc_send_event(evt, vhost, 0);
2239 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2240
2241 if (rc) {
2242 rc = -EIO;
2243 goto out;
2244 }
2245
2246 wait_for_completion(&evt->comp);
2247
2248 if (rsp_iu.passthru.common.status)
2249 rc = -EIO;
2250 else
2251 bsg_reply->reply_payload_rcv_len = rsp_len;
2252
2253 spin_lock_irqsave(vhost->host->host_lock, flags);
2254 ibmvfc_free_event(evt);
2255 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2256 bsg_reply->result = rc;
2257 bsg_job_done(job, bsg_reply->result,
2258 bsg_reply->reply_payload_rcv_len);
2259 rc = 0;
2260out:
2261 dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
2262 job->request_payload.sg_cnt, DMA_TO_DEVICE);
2263 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
2264 job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
2265 mutex_unlock(&vhost->passthru_mutex);
2266 LEAVE;
2267 return rc;
2268}
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
2280{
2281 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2282 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2283 struct ibmvfc_cmd *tmf;
2284 struct ibmvfc_event *evt = NULL;
2285 union ibmvfc_iu rsp_iu;
2286 struct ibmvfc_fcp_cmd_iu *iu;
2287 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd);
2288 int rsp_rc = -EBUSY;
2289 unsigned long flags;
2290 int rsp_code = 0;
2291
2292 spin_lock_irqsave(vhost->host->host_lock, flags);
2293 if (vhost->state == IBMVFC_ACTIVE) {
2294 if (vhost->using_channels)
2295 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]);
2296 else
2297 evt = ibmvfc_get_event(&vhost->crq);
2298
2299 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2300 tmf = ibmvfc_init_vfc_cmd(evt, sdev);
2301 iu = ibmvfc_get_fcp_iu(vhost, tmf);
2302
2303 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2304 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
2305 tmf->target_wwpn = cpu_to_be64(rport->port_name);
2306 iu->tmf_flags = type;
2307 evt->sync_iu = &rsp_iu;
2308
2309 init_completion(&evt->comp);
2310 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2311 }
2312 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2313
2314 if (rsp_rc != 0) {
2315 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n",
2316 desc, rsp_rc);
2317 return -EIO;
2318 }
2319
2320 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc);
2321 wait_for_completion(&evt->comp);
2322
2323 if (rsp_iu.cmd.status)
2324 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd);
2325
2326 if (rsp_code) {
2327 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2328 rsp_code = fc_rsp->data.info.rsp_code;
2329
2330 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) "
2331 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc,
2332 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2333 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
2334 fc_rsp->scsi_status);
2335 rsp_rc = -EIO;
2336 } else
2337 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc);
2338
2339 spin_lock_irqsave(vhost->host->host_lock, flags);
2340 ibmvfc_free_event(evt);
2341 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2342 return rsp_rc;
2343}
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
2354{
2355 struct fc_rport *cmd_rport;
2356
2357 if (evt->cmnd) {
2358 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
2359 if (cmd_rport == rport)
2360 return 1;
2361 }
2362 return 0;
2363}
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
2374{
2375 if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
2376 return 1;
2377 return 0;
2378}
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
2389{
2390 if (evt->cmnd && evt->cmnd->device == device)
2391 return 1;
2392 return 0;
2393}
2394
2395
2396
2397
2398
2399
2400
2401
2402static bool ibmvfc_event_is_free(struct ibmvfc_event *evt)
2403{
2404 struct ibmvfc_event *loop_evt;
2405
2406 list_for_each_entry(loop_evt, &evt->queue->free, queue_list)
2407 if (loop_evt == evt)
2408 return true;
2409
2410 return false;
2411}
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
2423 int (*match) (struct ibmvfc_event *, void *))
2424{
2425 struct ibmvfc_event *evt;
2426 DECLARE_COMPLETION_ONSTACK(comp);
2427 int wait, i, q_index, q_size;
2428 unsigned long flags;
2429 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
2430 struct ibmvfc_queue *queues;
2431
2432 ENTER;
2433 if (vhost->mq_enabled && vhost->using_channels) {
2434 queues = vhost->scsi_scrqs.scrqs;
2435 q_size = vhost->scsi_scrqs.active_queues;
2436 } else {
2437 queues = &vhost->crq;
2438 q_size = 1;
2439 }
2440
2441 do {
2442 wait = 0;
2443 spin_lock_irqsave(vhost->host->host_lock, flags);
2444 for (q_index = 0; q_index < q_size; q_index++) {
2445 spin_lock(&queues[q_index].l_lock);
2446 for (i = 0; i < queues[q_index].evt_pool.size; i++) {
2447 evt = &queues[q_index].evt_pool.events[i];
2448 if (!ibmvfc_event_is_free(evt)) {
2449 if (match(evt, device)) {
2450 evt->eh_comp = ∁
2451 wait++;
2452 }
2453 }
2454 }
2455 spin_unlock(&queues[q_index].l_lock);
2456 }
2457 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2458
2459 if (wait) {
2460 timeout = wait_for_completion_timeout(&comp, timeout);
2461
2462 if (!timeout) {
2463 wait = 0;
2464 spin_lock_irqsave(vhost->host->host_lock, flags);
2465 for (q_index = 0; q_index < q_size; q_index++) {
2466 spin_lock(&queues[q_index].l_lock);
2467 for (i = 0; i < queues[q_index].evt_pool.size; i++) {
2468 evt = &queues[q_index].evt_pool.events[i];
2469 if (!ibmvfc_event_is_free(evt)) {
2470 if (match(evt, device)) {
2471 evt->eh_comp = NULL;
2472 wait++;
2473 }
2474 }
2475 }
2476 spin_unlock(&queues[q_index].l_lock);
2477 }
2478 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2479 if (wait)
2480 dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
2481 LEAVE;
2482 return wait ? FAILED : SUCCESS;
2483 }
2484 }
2485 } while (wait);
2486
2487 LEAVE;
2488 return SUCCESS;
2489}
2490
2491static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue,
2492 struct scsi_device *sdev,
2493 int type)
2494{
2495 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2496 struct scsi_target *starget = scsi_target(sdev);
2497 struct fc_rport *rport = starget_to_rport(starget);
2498 struct ibmvfc_event *evt;
2499 struct ibmvfc_tmf *tmf;
2500
2501 evt = ibmvfc_get_event(queue);
2502 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
2503
2504 tmf = &evt->iu.tmf;
2505 memset(tmf, 0, sizeof(*tmf));
2506 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
2507 tmf->common.version = cpu_to_be32(2);
2508 tmf->target_wwpn = cpu_to_be64(rport->port_name);
2509 } else {
2510 tmf->common.version = cpu_to_be32(1);
2511 }
2512 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
2513 tmf->common.length = cpu_to_be16(sizeof(*tmf));
2514 tmf->scsi_id = cpu_to_be64(rport->port_id);
2515 int_to_scsilun(sdev->lun, &tmf->lun);
2516 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS))
2517 type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
2518 if (vhost->state == IBMVFC_ACTIVE)
2519 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
2520 else
2521 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
2522 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
2523 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
2524
2525 init_completion(&evt->comp);
2526
2527 return evt;
2528}
2529
2530static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type)
2531{
2532 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2533 struct ibmvfc_event *evt, *found_evt, *temp;
2534 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs;
2535 unsigned long flags;
2536 int num_hwq, i;
2537 int fail = 0;
2538 LIST_HEAD(cancelq);
2539 u16 status;
2540
2541 ENTER;
2542 spin_lock_irqsave(vhost->host->host_lock, flags);
2543 num_hwq = vhost->scsi_scrqs.active_queues;
2544 for (i = 0; i < num_hwq; i++) {
2545 spin_lock(queues[i].q_lock);
2546 spin_lock(&queues[i].l_lock);
2547 found_evt = NULL;
2548 list_for_each_entry(evt, &queues[i].sent, queue_list) {
2549 if (evt->cmnd && evt->cmnd->device == sdev) {
2550 found_evt = evt;
2551 break;
2552 }
2553 }
2554 spin_unlock(&queues[i].l_lock);
2555
2556 if (found_evt && vhost->logged_in) {
2557 evt = ibmvfc_init_tmf(&queues[i], sdev, type);
2558 evt->sync_iu = &queues[i].cancel_rsp;
2559 ibmvfc_send_event(evt, vhost, default_timeout);
2560 list_add_tail(&evt->cancel, &cancelq);
2561 }
2562
2563 spin_unlock(queues[i].q_lock);
2564 }
2565 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2566
2567 if (list_empty(&cancelq)) {
2568 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2569 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2570 return 0;
2571 }
2572
2573 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2574
2575 list_for_each_entry_safe(evt, temp, &cancelq, cancel) {
2576 wait_for_completion(&evt->comp);
2577 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status);
2578 list_del(&evt->cancel);
2579 ibmvfc_free_event(evt);
2580
2581 if (status != IBMVFC_MAD_SUCCESS) {
2582 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2583 switch (status) {
2584 case IBMVFC_MAD_DRIVER_FAILED:
2585 case IBMVFC_MAD_CRQ_ERROR:
2586
2587
2588
2589 break;
2590 default:
2591 fail = 1;
2592 break;
2593 }
2594 }
2595 }
2596
2597 if (fail)
2598 return -EIO;
2599
2600 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2601 LEAVE;
2602 return 0;
2603}
2604
2605static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type)
2606{
2607 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2608 struct ibmvfc_event *evt, *found_evt;
2609 union ibmvfc_iu rsp;
2610 int rsp_rc = -EBUSY;
2611 unsigned long flags;
2612 u16 status;
2613
2614 ENTER;
2615 found_evt = NULL;
2616 spin_lock_irqsave(vhost->host->host_lock, flags);
2617 spin_lock(&vhost->crq.l_lock);
2618 list_for_each_entry(evt, &vhost->crq.sent, queue_list) {
2619 if (evt->cmnd && evt->cmnd->device == sdev) {
2620 found_evt = evt;
2621 break;
2622 }
2623 }
2624 spin_unlock(&vhost->crq.l_lock);
2625
2626 if (!found_evt) {
2627 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2628 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n");
2629 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2630 return 0;
2631 }
2632
2633 if (vhost->logged_in) {
2634 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type);
2635 evt->sync_iu = &rsp;
2636 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2637 }
2638
2639 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2640
2641 if (rsp_rc != 0) {
2642 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc);
2643
2644
2645
2646 return 0;
2647 }
2648
2649 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n");
2650
2651 wait_for_completion(&evt->comp);
2652 status = be16_to_cpu(rsp.mad_common.status);
2653 spin_lock_irqsave(vhost->host->host_lock, flags);
2654 ibmvfc_free_event(evt);
2655 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2656
2657 if (status != IBMVFC_MAD_SUCCESS) {
2658 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status);
2659 switch (status) {
2660 case IBMVFC_MAD_DRIVER_FAILED:
2661 case IBMVFC_MAD_CRQ_ERROR:
2662
2663
2664 return 0;
2665 default:
2666 return -EIO;
2667 };
2668 }
2669
2670 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
2671 return 0;
2672}
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
2686{
2687 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2688
2689 if (vhost->mq_enabled && vhost->using_channels)
2690 return ibmvfc_cancel_all_mq(sdev, type);
2691 else
2692 return ibmvfc_cancel_all_sq(sdev, type);
2693}
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
2704{
2705 unsigned long cancel_key = (unsigned long)key;
2706
2707 if (evt->crq.format == IBMVFC_CMD_FORMAT &&
2708 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key)
2709 return 1;
2710 return 0;
2711}
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
2722{
2723 if (evt == match)
2724 return 1;
2725 return 0;
2726}
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738static int ibmvfc_abort_task_set(struct scsi_device *sdev)
2739{
2740 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2741 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
2742 struct ibmvfc_cmd *tmf;
2743 struct ibmvfc_event *evt, *found_evt;
2744 union ibmvfc_iu rsp_iu;
2745 struct ibmvfc_fcp_cmd_iu *iu;
2746 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd);
2747 int rc, rsp_rc = -EBUSY;
2748 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
2749 int rsp_code = 0;
2750
2751 found_evt = NULL;
2752 spin_lock_irqsave(vhost->host->host_lock, flags);
2753 spin_lock(&vhost->crq.l_lock);
2754 list_for_each_entry(evt, &vhost->crq.sent, queue_list) {
2755 if (evt->cmnd && evt->cmnd->device == sdev) {
2756 found_evt = evt;
2757 break;
2758 }
2759 }
2760 spin_unlock(&vhost->crq.l_lock);
2761
2762 if (!found_evt) {
2763 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
2764 sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
2765 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2766 return 0;
2767 }
2768
2769 if (vhost->state == IBMVFC_ACTIVE) {
2770 evt = ibmvfc_get_event(&vhost->crq);
2771 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
2772 tmf = ibmvfc_init_vfc_cmd(evt, sdev);
2773 iu = ibmvfc_get_fcp_iu(vhost, tmf);
2774
2775 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN))
2776 tmf->target_wwpn = cpu_to_be64(rport->port_name);
2777 iu->tmf_flags = IBMVFC_ABORT_TASK_SET;
2778 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF));
2779 evt->sync_iu = &rsp_iu;
2780
2781 tmf->correlation = cpu_to_be64((u64)evt);
2782
2783 init_completion(&evt->comp);
2784 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
2785 }
2786
2787 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2788
2789 if (rsp_rc != 0) {
2790 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
2791 return -EIO;
2792 }
2793
2794 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
2795 timeout = wait_for_completion_timeout(&evt->comp, timeout);
2796
2797 if (!timeout) {
2798 rc = ibmvfc_cancel_all(sdev, 0);
2799 if (!rc) {
2800 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2801 if (rc == SUCCESS)
2802 rc = 0;
2803 }
2804
2805 if (rc) {
2806 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
2807 ibmvfc_reset_host(vhost);
2808 rsp_rc = -EIO;
2809 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
2810
2811 if (rc == SUCCESS)
2812 rsp_rc = 0;
2813
2814 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
2815 if (rc != SUCCESS) {
2816 spin_lock_irqsave(vhost->host->host_lock, flags);
2817 ibmvfc_hard_reset_host(vhost);
2818 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2819 rsp_rc = 0;
2820 }
2821
2822 goto out;
2823 }
2824 }
2825
2826 if (rsp_iu.cmd.status)
2827 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd);
2828
2829 if (rsp_code) {
2830 if (fc_rsp->flags & FCP_RSP_LEN_VALID)
2831 rsp_code = fc_rsp->data.info.rsp_code;
2832
2833 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
2834 "flags: %x fcp_rsp: %x, scsi_status: %x\n",
2835 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)),
2836 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code,
2837 fc_rsp->scsi_status);
2838 rsp_rc = -EIO;
2839 } else
2840 sdev_printk(KERN_INFO, sdev, "Abort successful\n");
2841
2842out:
2843 spin_lock_irqsave(vhost->host->host_lock, flags);
2844 ibmvfc_free_event(evt);
2845 spin_unlock_irqrestore(vhost->host->host_lock, flags);
2846 return rsp_rc;
2847}
2848
2849
2850
2851
2852
2853
2854
2855
2856static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
2857{
2858 struct scsi_device *sdev = cmd->device;
2859 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2860 int cancel_rc, block_rc;
2861 int rc = FAILED;
2862
2863 ENTER;
2864 block_rc = fc_block_scsi_eh(cmd);
2865 ibmvfc_wait_while_resetting(vhost);
2866 if (block_rc != FAST_IO_FAIL) {
2867 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
2868 ibmvfc_abort_task_set(sdev);
2869 } else
2870 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2871
2872 if (!cancel_rc)
2873 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2874
2875 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2876 rc = FAST_IO_FAIL;
2877
2878 LEAVE;
2879 return rc;
2880}
2881
2882
2883
2884
2885
2886
2887
2888
2889static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
2890{
2891 struct scsi_device *sdev = cmd->device;
2892 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2893 int cancel_rc, block_rc, reset_rc = 0;
2894 int rc = FAILED;
2895
2896 ENTER;
2897 block_rc = fc_block_scsi_eh(cmd);
2898 ibmvfc_wait_while_resetting(vhost);
2899 if (block_rc != FAST_IO_FAIL) {
2900 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
2901 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
2902 } else
2903 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2904
2905 if (!cancel_rc && !reset_rc)
2906 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
2907
2908 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2909 rc = FAST_IO_FAIL;
2910
2911 LEAVE;
2912 return rc;
2913}
2914
2915
2916
2917
2918
2919
2920
2921static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
2922{
2923 unsigned long *rc = data;
2924 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
2925}
2926
2927
2928
2929
2930
2931
2932
2933static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
2934{
2935 unsigned long *rc = data;
2936 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
2937}
2938
2939
2940
2941
2942
2943
2944
2945
2946static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
2947{
2948 struct scsi_device *sdev = cmd->device;
2949 struct ibmvfc_host *vhost = shost_priv(sdev->host);
2950 struct scsi_target *starget = scsi_target(sdev);
2951 int block_rc;
2952 int reset_rc = 0;
2953 int rc = FAILED;
2954 unsigned long cancel_rc = 0;
2955
2956 ENTER;
2957 block_rc = fc_block_scsi_eh(cmd);
2958 ibmvfc_wait_while_resetting(vhost);
2959 if (block_rc != FAST_IO_FAIL) {
2960 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
2961 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
2962 } else
2963 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
2964
2965 if (!cancel_rc && !reset_rc)
2966 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
2967
2968 if (block_rc == FAST_IO_FAIL && rc != FAILED)
2969 rc = FAST_IO_FAIL;
2970
2971 LEAVE;
2972 return rc;
2973}
2974
2975
2976
2977
2978
2979
2980static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
2981{
2982 int rc;
2983 struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
2984
2985 dev_err(vhost->dev, "Resetting connection due to error recovery\n");
2986 rc = ibmvfc_issue_fc_host_lip(vhost->host);
2987
2988 return rc ? FAILED : SUCCESS;
2989}
2990
2991
2992
2993
2994
2995
2996
2997
2998static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
2999{
3000 struct Scsi_Host *shost = rport_to_shost(rport);
3001 struct ibmvfc_host *vhost = shost_priv(shost);
3002 struct fc_rport *dev_rport;
3003 struct scsi_device *sdev;
3004 struct ibmvfc_target *tgt;
3005 unsigned long rc, flags;
3006 unsigned int found;
3007
3008 ENTER;
3009 shost_for_each_device(sdev, shost) {
3010 dev_rport = starget_to_rport(scsi_target(sdev));
3011 if (dev_rport != rport)
3012 continue;
3013 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
3014 }
3015
3016 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
3017
3018 if (rc == FAILED)
3019 ibmvfc_issue_fc_host_lip(shost);
3020
3021 spin_lock_irqsave(shost->host_lock, flags);
3022 found = 0;
3023 list_for_each_entry(tgt, &vhost->targets, queue) {
3024 if (tgt->scsi_id == rport->port_id) {
3025 found++;
3026 break;
3027 }
3028 }
3029
3030 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) {
3031
3032
3033
3034
3035
3036 ibmvfc_del_tgt(tgt);
3037 ibmvfc_reinit_host(vhost);
3038 }
3039
3040 spin_unlock_irqrestore(shost->host_lock, flags);
3041 LEAVE;
3042}
3043
3044static const struct ibmvfc_async_desc ae_desc [] = {
3045 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3046 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3047 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3048 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3049 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
3050 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
3051 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
3052 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
3053 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
3054 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
3055 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
3056 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
3057 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
3058};
3059
3060static const struct ibmvfc_async_desc unknown_ae = {
3061 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
3062};
3063
3064
3065
3066
3067
3068
3069static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
3070{
3071 int i;
3072
3073 for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
3074 if (ae_desc[i].ae == ae)
3075 return &ae_desc[i];
3076
3077 return &unknown_ae;
3078}
3079
3080static const struct {
3081 enum ibmvfc_ae_link_state state;
3082 const char *desc;
3083} link_desc [] = {
3084 { IBMVFC_AE_LS_LINK_UP, " link up" },
3085 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
3086 { IBMVFC_AE_LS_LINK_DOWN, " link down" },
3087 { IBMVFC_AE_LS_LINK_DEAD, " link dead" },
3088};
3089
3090
3091
3092
3093
3094
3095static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
3096{
3097 int i;
3098
3099 for (i = 0; i < ARRAY_SIZE(link_desc); i++)
3100 if (link_desc[i].state == state)
3101 return link_desc[i].desc;
3102
3103 return "";
3104}
3105
3106
3107
3108
3109
3110
3111
3112static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
3113 struct ibmvfc_host *vhost)
3114{
3115 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event));
3116 struct ibmvfc_target *tgt;
3117
3118 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
3119 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id),
3120 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name),
3121 ibmvfc_get_link_state(crq->link_state));
3122
3123 switch (be64_to_cpu(crq->event)) {
3124 case IBMVFC_AE_RESUME:
3125 switch (crq->link_state) {
3126 case IBMVFC_AE_LS_LINK_DOWN:
3127 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3128 break;
3129 case IBMVFC_AE_LS_LINK_DEAD:
3130 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3131 break;
3132 case IBMVFC_AE_LS_LINK_UP:
3133 case IBMVFC_AE_LS_LINK_BOUNCED:
3134 default:
3135 vhost->events_to_log |= IBMVFC_AE_LINKUP;
3136 vhost->delay_init = 1;
3137 __ibmvfc_reset_host(vhost);
3138 break;
3139 }
3140
3141 break;
3142 case IBMVFC_AE_LINK_UP:
3143 vhost->events_to_log |= IBMVFC_AE_LINKUP;
3144 vhost->delay_init = 1;
3145 __ibmvfc_reset_host(vhost);
3146 break;
3147 case IBMVFC_AE_SCN_FABRIC:
3148 case IBMVFC_AE_SCN_DOMAIN:
3149 vhost->events_to_log |= IBMVFC_AE_RSCN;
3150 if (vhost->state < IBMVFC_HALTED) {
3151 vhost->delay_init = 1;
3152 __ibmvfc_reset_host(vhost);
3153 }
3154 break;
3155 case IBMVFC_AE_SCN_NPORT:
3156 case IBMVFC_AE_SCN_GROUP:
3157 vhost->events_to_log |= IBMVFC_AE_RSCN;
3158 ibmvfc_reinit_host(vhost);
3159 break;
3160 case IBMVFC_AE_ELS_LOGO:
3161 case IBMVFC_AE_ELS_PRLO:
3162 case IBMVFC_AE_ELS_PLOGI:
3163 list_for_each_entry(tgt, &vhost->targets, queue) {
3164 if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
3165 break;
3166 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id)
3167 continue;
3168 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn)
3169 continue;
3170 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name)
3171 continue;
3172 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO)
3173 tgt->logo_rcvd = 1;
3174 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) {
3175 ibmvfc_del_tgt(tgt);
3176 ibmvfc_reinit_host(vhost);
3177 }
3178 }
3179 break;
3180 case IBMVFC_AE_LINK_DOWN:
3181 case IBMVFC_AE_ADAPTER_FAILED:
3182 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3183 break;
3184 case IBMVFC_AE_LINK_DEAD:
3185 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
3186 break;
3187 case IBMVFC_AE_HALT:
3188 ibmvfc_link_down(vhost, IBMVFC_HALTED);
3189 break;
3190 default:
3191 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event);
3192 break;
3193 }
3194}
3195
3196
3197
3198
3199
3200
3201
3202
3203static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost,
3204 struct list_head *evt_doneq)
3205{
3206 long rc;
3207 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
3208
3209 switch (crq->valid) {
3210 case IBMVFC_CRQ_INIT_RSP:
3211 switch (crq->format) {
3212 case IBMVFC_CRQ_INIT:
3213 dev_info(vhost->dev, "Partner initialized\n");
3214
3215 rc = ibmvfc_send_crq_init_complete(vhost);
3216 if (rc == 0)
3217 ibmvfc_init_host(vhost);
3218 else
3219 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
3220 break;
3221 case IBMVFC_CRQ_INIT_COMPLETE:
3222 dev_info(vhost->dev, "Partner initialization complete\n");
3223 ibmvfc_init_host(vhost);
3224 break;
3225 default:
3226 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
3227 }
3228 return;
3229 case IBMVFC_CRQ_XPORT_EVENT:
3230 vhost->state = IBMVFC_NO_CRQ;
3231 vhost->logged_in = 0;
3232 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
3233 if (crq->format == IBMVFC_PARTITION_MIGRATED) {
3234
3235 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n");
3236 vhost->client_migrated = 1;
3237 ibmvfc_purge_requests(vhost, DID_REQUEUE);
3238 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3239 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
3240 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) {
3241 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format);
3242 ibmvfc_purge_requests(vhost, DID_ERROR);
3243 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
3244 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
3245 } else {
3246 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format);
3247 }
3248 return;
3249 case IBMVFC_CRQ_CMD_RSP:
3250 break;
3251 default:
3252 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid);
3253 return;
3254 }
3255
3256 if (crq->format == IBMVFC_ASYNC_EVENT)
3257 return;
3258
3259
3260
3261
3262
3263 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) {
3264 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
3265 crq->ioba);
3266 return;
3267 }
3268
3269 if (unlikely(atomic_dec_if_positive(&evt->active))) {
3270 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
3271 crq->ioba);
3272 return;
3273 }
3274
3275 spin_lock(&evt->queue->l_lock);
3276 list_move_tail(&evt->queue_list, evt_doneq);
3277 spin_unlock(&evt->queue->l_lock);
3278}
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
3289{
3290 unsigned long flags;
3291 struct ibmvfc_host *vhost = shost_priv(shost);
3292 int done = 0;
3293
3294 spin_lock_irqsave(shost->host_lock, flags);
3295 if (time >= (init_timeout * HZ)) {
3296 dev_info(vhost->dev, "Scan taking longer than %d seconds, "
3297 "continuing initialization\n", init_timeout);
3298 done = 1;
3299 }
3300
3301 if (vhost->scan_complete)
3302 done = 1;
3303 spin_unlock_irqrestore(shost->host_lock, flags);
3304 return done;
3305}
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317static int ibmvfc_slave_alloc(struct scsi_device *sdev)
3318{
3319 struct Scsi_Host *shost = sdev->host;
3320 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3321 struct ibmvfc_host *vhost = shost_priv(shost);
3322 unsigned long flags = 0;
3323
3324 if (!rport || fc_remote_port_chkready(rport))
3325 return -ENXIO;
3326
3327 spin_lock_irqsave(shost->host_lock, flags);
3328 sdev->hostdata = (void *)(unsigned long)vhost->task_set++;
3329 spin_unlock_irqrestore(shost->host_lock, flags);
3330 return 0;
3331}
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343static int ibmvfc_target_alloc(struct scsi_target *starget)
3344{
3345 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
3346 struct ibmvfc_host *vhost = shost_priv(shost);
3347 unsigned long flags = 0;
3348
3349 spin_lock_irqsave(shost->host_lock, flags);
3350 starget->hostdata = (void *)(unsigned long)vhost->task_set++;
3351 spin_unlock_irqrestore(shost->host_lock, flags);
3352 return 0;
3353}
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365static int ibmvfc_slave_configure(struct scsi_device *sdev)
3366{
3367 struct Scsi_Host *shost = sdev->host;
3368 unsigned long flags = 0;
3369
3370 spin_lock_irqsave(shost->host_lock, flags);
3371 if (sdev->type == TYPE_DISK) {
3372 sdev->allow_restart = 1;
3373 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ);
3374 }
3375 spin_unlock_irqrestore(shost->host_lock, flags);
3376 return 0;
3377}
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth)
3388{
3389 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN)
3390 qdepth = IBMVFC_MAX_CMDS_PER_LUN;
3391
3392 return scsi_change_queue_depth(sdev, qdepth);
3393}
3394
3395static ssize_t ibmvfc_show_host_partition_name(struct device *dev,
3396 struct device_attribute *attr, char *buf)
3397{
3398 struct Scsi_Host *shost = class_to_shost(dev);
3399 struct ibmvfc_host *vhost = shost_priv(shost);
3400
3401 return snprintf(buf, PAGE_SIZE, "%s\n",
3402 vhost->login_buf->resp.partition_name);
3403}
3404
3405static ssize_t ibmvfc_show_host_device_name(struct device *dev,
3406 struct device_attribute *attr, char *buf)
3407{
3408 struct Scsi_Host *shost = class_to_shost(dev);
3409 struct ibmvfc_host *vhost = shost_priv(shost);
3410
3411 return snprintf(buf, PAGE_SIZE, "%s\n",
3412 vhost->login_buf->resp.device_name);
3413}
3414
3415static ssize_t ibmvfc_show_host_loc_code(struct device *dev,
3416 struct device_attribute *attr, char *buf)
3417{
3418 struct Scsi_Host *shost = class_to_shost(dev);
3419 struct ibmvfc_host *vhost = shost_priv(shost);
3420
3421 return snprintf(buf, PAGE_SIZE, "%s\n",
3422 vhost->login_buf->resp.port_loc_code);
3423}
3424
3425static ssize_t ibmvfc_show_host_drc_name(struct device *dev,
3426 struct device_attribute *attr, char *buf)
3427{
3428 struct Scsi_Host *shost = class_to_shost(dev);
3429 struct ibmvfc_host *vhost = shost_priv(shost);
3430
3431 return snprintf(buf, PAGE_SIZE, "%s\n",
3432 vhost->login_buf->resp.drc_name);
3433}
3434
3435static ssize_t ibmvfc_show_host_npiv_version(struct device *dev,
3436 struct device_attribute *attr, char *buf)
3437{
3438 struct Scsi_Host *shost = class_to_shost(dev);
3439 struct ibmvfc_host *vhost = shost_priv(shost);
3440 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version));
3441}
3442
3443static ssize_t ibmvfc_show_host_capabilities(struct device *dev,
3444 struct device_attribute *attr, char *buf)
3445{
3446 struct Scsi_Host *shost = class_to_shost(dev);
3447 struct ibmvfc_host *vhost = shost_priv(shost);
3448 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities));
3449}
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460static ssize_t ibmvfc_show_log_level(struct device *dev,
3461 struct device_attribute *attr, char *buf)
3462{
3463 struct Scsi_Host *shost = class_to_shost(dev);
3464 struct ibmvfc_host *vhost = shost_priv(shost);
3465 unsigned long flags = 0;
3466 int len;
3467
3468 spin_lock_irqsave(shost->host_lock, flags);
3469 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level);
3470 spin_unlock_irqrestore(shost->host_lock, flags);
3471 return len;
3472}
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484static ssize_t ibmvfc_store_log_level(struct device *dev,
3485 struct device_attribute *attr,
3486 const char *buf, size_t count)
3487{
3488 struct Scsi_Host *shost = class_to_shost(dev);
3489 struct ibmvfc_host *vhost = shost_priv(shost);
3490 unsigned long flags = 0;
3491
3492 spin_lock_irqsave(shost->host_lock, flags);
3493 vhost->log_level = simple_strtoul(buf, NULL, 10);
3494 spin_unlock_irqrestore(shost->host_lock, flags);
3495 return strlen(buf);
3496}
3497
3498static ssize_t ibmvfc_show_scsi_channels(struct device *dev,
3499 struct device_attribute *attr, char *buf)
3500{
3501 struct Scsi_Host *shost = class_to_shost(dev);
3502 struct ibmvfc_host *vhost = shost_priv(shost);
3503 unsigned long flags = 0;
3504 int len;
3505
3506 spin_lock_irqsave(shost->host_lock, flags);
3507 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels);
3508 spin_unlock_irqrestore(shost->host_lock, flags);
3509 return len;
3510}
3511
3512static ssize_t ibmvfc_store_scsi_channels(struct device *dev,
3513 struct device_attribute *attr,
3514 const char *buf, size_t count)
3515{
3516 struct Scsi_Host *shost = class_to_shost(dev);
3517 struct ibmvfc_host *vhost = shost_priv(shost);
3518 unsigned long flags = 0;
3519 unsigned int channels;
3520
3521 spin_lock_irqsave(shost->host_lock, flags);
3522 channels = simple_strtoul(buf, NULL, 10);
3523 vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues);
3524 ibmvfc_hard_reset_host(vhost);
3525 spin_unlock_irqrestore(shost->host_lock, flags);
3526 return strlen(buf);
3527}
3528
3529static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
3530static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
3531static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
3532static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
3533static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
3534static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
3535static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
3536 ibmvfc_show_log_level, ibmvfc_store_log_level);
3537static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR,
3538 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels);
3539
3540#ifdef CONFIG_SCSI_IBMVFC_TRACE
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj,
3554 struct bin_attribute *bin_attr,
3555 char *buf, loff_t off, size_t count)
3556{
3557 struct device *dev = kobj_to_dev(kobj);
3558 struct Scsi_Host *shost = class_to_shost(dev);
3559 struct ibmvfc_host *vhost = shost_priv(shost);
3560 unsigned long flags = 0;
3561 int size = IBMVFC_TRACE_SIZE;
3562 char *src = (char *)vhost->trace;
3563
3564 if (off > size)
3565 return 0;
3566 if (off + count > size) {
3567 size -= off;
3568 count = size;
3569 }
3570
3571 spin_lock_irqsave(shost->host_lock, flags);
3572 memcpy(buf, &src[off], count);
3573 spin_unlock_irqrestore(shost->host_lock, flags);
3574 return count;
3575}
3576
3577static struct bin_attribute ibmvfc_trace_attr = {
3578 .attr = {
3579 .name = "trace",
3580 .mode = S_IRUGO,
3581 },
3582 .size = 0,
3583 .read = ibmvfc_read_trace,
3584};
3585#endif
3586
3587static struct device_attribute *ibmvfc_attrs[] = {
3588 &dev_attr_partition_name,
3589 &dev_attr_device_name,
3590 &dev_attr_port_loc_code,
3591 &dev_attr_drc_name,
3592 &dev_attr_npiv_version,
3593 &dev_attr_capabilities,
3594 &dev_attr_log_level,
3595 &dev_attr_nr_scsi_channels,
3596 NULL
3597};
3598
3599static struct scsi_host_template driver_template = {
3600 .module = THIS_MODULE,
3601 .name = "IBM POWER Virtual FC Adapter",
3602 .proc_name = IBMVFC_NAME,
3603 .queuecommand = ibmvfc_queuecommand,
3604 .eh_timed_out = fc_eh_timed_out,
3605 .eh_abort_handler = ibmvfc_eh_abort_handler,
3606 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler,
3607 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler,
3608 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
3609 .slave_alloc = ibmvfc_slave_alloc,
3610 .slave_configure = ibmvfc_slave_configure,
3611 .target_alloc = ibmvfc_target_alloc,
3612 .scan_finished = ibmvfc_scan_finished,
3613 .change_queue_depth = ibmvfc_change_queue_depth,
3614 .cmd_per_lun = 16,
3615 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT,
3616 .this_id = -1,
3617 .sg_tablesize = SG_ALL,
3618 .max_sectors = IBMVFC_MAX_SECTORS,
3619 .shost_attrs = ibmvfc_attrs,
3620 .track_queue_depth = 1,
3621 .host_tagset = 1,
3622};
3623
3624
3625
3626
3627
3628
3629
3630
3631static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost)
3632{
3633 struct ibmvfc_queue *async_crq = &vhost->async_crq;
3634 struct ibmvfc_async_crq *crq;
3635
3636 crq = &async_crq->msgs.async[async_crq->cur];
3637 if (crq->valid & 0x80) {
3638 if (++async_crq->cur == async_crq->size)
3639 async_crq->cur = 0;
3640 rmb();
3641 } else
3642 crq = NULL;
3643
3644 return crq;
3645}
3646
3647
3648
3649
3650
3651
3652
3653
3654static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
3655{
3656 struct ibmvfc_queue *queue = &vhost->crq;
3657 struct ibmvfc_crq *crq;
3658
3659 crq = &queue->msgs.crq[queue->cur];
3660 if (crq->valid & 0x80) {
3661 if (++queue->cur == queue->size)
3662 queue->cur = 0;
3663 rmb();
3664 } else
3665 crq = NULL;
3666
3667 return crq;
3668}
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
3679{
3680 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
3681 unsigned long flags;
3682
3683 spin_lock_irqsave(vhost->host->host_lock, flags);
3684 vio_disable_interrupts(to_vio_dev(vhost->dev));
3685 tasklet_schedule(&vhost->tasklet);
3686 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3687 return IRQ_HANDLED;
3688}
3689
3690
3691
3692
3693
3694
3695
3696
3697static void ibmvfc_tasklet(void *data)
3698{
3699 struct ibmvfc_host *vhost = data;
3700 struct vio_dev *vdev = to_vio_dev(vhost->dev);
3701 struct ibmvfc_crq *crq;
3702 struct ibmvfc_async_crq *async;
3703 struct ibmvfc_event *evt, *temp;
3704 unsigned long flags;
3705 int done = 0;
3706 LIST_HEAD(evt_doneq);
3707
3708 spin_lock_irqsave(vhost->host->host_lock, flags);
3709 spin_lock(vhost->crq.q_lock);
3710 while (!done) {
3711
3712 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3713 ibmvfc_handle_async(async, vhost);
3714 async->valid = 0;
3715 wmb();
3716 }
3717
3718
3719 while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3720 ibmvfc_handle_crq(crq, vhost, &evt_doneq);
3721 crq->valid = 0;
3722 wmb();
3723 }
3724
3725 vio_enable_interrupts(vdev);
3726 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
3727 vio_disable_interrupts(vdev);
3728 ibmvfc_handle_async(async, vhost);
3729 async->valid = 0;
3730 wmb();
3731 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
3732 vio_disable_interrupts(vdev);
3733 ibmvfc_handle_crq(crq, vhost, &evt_doneq);
3734 crq->valid = 0;
3735 wmb();
3736 } else
3737 done = 1;
3738 }
3739
3740 spin_unlock(vhost->crq.q_lock);
3741 spin_unlock_irqrestore(vhost->host->host_lock, flags);
3742
3743 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) {
3744 del_timer(&evt->timer);
3745 list_del(&evt->queue_list);
3746 ibmvfc_trc_end(evt);
3747 evt->done(evt);
3748 }
3749}
3750
3751static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable)
3752{
3753 struct device *dev = scrq->vhost->dev;
3754 struct vio_dev *vdev = to_vio_dev(dev);
3755 unsigned long rc;
3756 int irq_action = H_ENABLE_VIO_INTERRUPT;
3757
3758 if (!enable)
3759 irq_action = H_DISABLE_VIO_INTERRUPT;
3760
3761 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action,
3762 scrq->hw_irq, 0, 0);
3763
3764 if (rc)
3765 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n",
3766 enable ? "enable" : "disable", scrq->hwq_id, rc);
3767
3768 return rc;
3769}
3770
3771static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost,
3772 struct list_head *evt_doneq)
3773{
3774 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba);
3775
3776 switch (crq->valid) {
3777 case IBMVFC_CRQ_CMD_RSP:
3778 break;
3779 case IBMVFC_CRQ_XPORT_EVENT:
3780 return;
3781 default:
3782 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid);
3783 return;
3784 }
3785
3786
3787
3788
3789
3790 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) {
3791 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n",
3792 crq->ioba);
3793 return;
3794 }
3795
3796 if (unlikely(atomic_dec_if_positive(&evt->active))) {
3797 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n",
3798 crq->ioba);
3799 return;
3800 }
3801
3802 spin_lock(&evt->queue->l_lock);
3803 list_move_tail(&evt->queue_list, evt_doneq);
3804 spin_unlock(&evt->queue->l_lock);
3805}
3806
3807static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq)
3808{
3809 struct ibmvfc_crq *crq;
3810
3811 crq = &scrq->msgs.scrq[scrq->cur].crq;
3812 if (crq->valid & 0x80) {
3813 if (++scrq->cur == scrq->size)
3814 scrq->cur = 0;
3815 rmb();
3816 } else
3817 crq = NULL;
3818
3819 return crq;
3820}
3821
3822static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq)
3823{
3824 struct ibmvfc_crq *crq;
3825 struct ibmvfc_event *evt, *temp;
3826 unsigned long flags;
3827 int done = 0;
3828 LIST_HEAD(evt_doneq);
3829
3830 spin_lock_irqsave(scrq->q_lock, flags);
3831 while (!done) {
3832 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) {
3833 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq);
3834 crq->valid = 0;
3835 wmb();
3836 }
3837
3838 ibmvfc_toggle_scrq_irq(scrq, 1);
3839 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) {
3840 ibmvfc_toggle_scrq_irq(scrq, 0);
3841 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq);
3842 crq->valid = 0;
3843 wmb();
3844 } else
3845 done = 1;
3846 }
3847 spin_unlock_irqrestore(scrq->q_lock, flags);
3848
3849 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) {
3850 del_timer(&evt->timer);
3851 list_del(&evt->queue_list);
3852 ibmvfc_trc_end(evt);
3853 evt->done(evt);
3854 }
3855}
3856
3857static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance)
3858{
3859 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance;
3860
3861 ibmvfc_toggle_scrq_irq(scrq, 0);
3862 ibmvfc_drain_sub_crq(scrq);
3863
3864 return IRQ_HANDLED;
3865}
3866
3867
3868
3869
3870
3871
3872
3873static void ibmvfc_init_tgt(struct ibmvfc_target *tgt,
3874 void (*job_step) (struct ibmvfc_target *))
3875{
3876 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT))
3877 tgt->job_step = job_step;
3878 wake_up(&tgt->vhost->work_wait_q);
3879}
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
3890 void (*job_step) (struct ibmvfc_target *))
3891{
3892 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
3893 ibmvfc_del_tgt(tgt);
3894 wake_up(&tgt->vhost->work_wait_q);
3895 return 0;
3896 } else
3897 ibmvfc_init_tgt(tgt, job_step);
3898 return 1;
3899}
3900
3901
3902static const struct {
3903 int code;
3904 int retry;
3905 int logged_in;
3906} prli_rsp [] = {
3907 { 0, 1, 0 },
3908 { 1, 0, 1 },
3909 { 2, 1, 0 },
3910 { 3, 1, 0 },
3911 { 4, 0, 0 },
3912 { 5, 0, 0 },
3913 { 6, 0, 1 },
3914 { 7, 0, 0 },
3915 { 8, 1, 0 },
3916};
3917
3918
3919
3920
3921
3922
3923static int ibmvfc_get_prli_rsp(u16 flags)
3924{
3925 int i;
3926 int code = (flags & 0x0f00) >> 8;
3927
3928 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
3929 if (prli_rsp[i].code == code)
3930 return i;
3931
3932 return 0;
3933}
3934
3935
3936
3937
3938
3939
3940static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt)
3941{
3942 struct ibmvfc_target *tgt = evt->tgt;
3943 struct ibmvfc_host *vhost = evt->vhost;
3944 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli;
3945 struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
3946 u32 status = be16_to_cpu(rsp->common.status);
3947 int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
3948
3949 vhost->discovery_threads--;
3950 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
3951 switch (status) {
3952 case IBMVFC_MAD_SUCCESS:
3953 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
3954 parms->type, parms->flags, parms->service_parms);
3955
3956 if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
3957 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags));
3958 if (prli_rsp[index].logged_in) {
3959 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) {
3960 tgt->need_login = 0;
3961 tgt->ids.roles = 0;
3962 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC)
3963 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
3964 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC)
3965 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
3966 tgt->add_rport = 1;
3967 } else
3968 ibmvfc_del_tgt(tgt);
3969 } else if (prli_rsp[index].retry)
3970 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3971 else
3972 ibmvfc_del_tgt(tgt);
3973 } else
3974 ibmvfc_del_tgt(tgt);
3975 break;
3976 case IBMVFC_MAD_DRIVER_FAILED:
3977 break;
3978 case IBMVFC_MAD_CRQ_ERROR:
3979 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3980 break;
3981 case IBMVFC_MAD_FAILED:
3982 default:
3983 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) &&
3984 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED)
3985 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3986 else if (tgt->logo_rcvd)
3987 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
3988 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
3989 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
3990 else
3991 ibmvfc_del_tgt(tgt);
3992
3993 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
3994 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
3995 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status);
3996 break;
3997 }
3998
3999 kref_put(&tgt->kref, ibmvfc_release_tgt);
4000 ibmvfc_free_event(evt);
4001 wake_up(&vhost->work_wait_q);
4002}
4003
4004
4005
4006
4007
4008
4009static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt)
4010{
4011 struct ibmvfc_process_login *prli;
4012 struct ibmvfc_host *vhost = tgt->vhost;
4013 struct ibmvfc_event *evt;
4014
4015 if (vhost->discovery_threads >= disc_threads)
4016 return;
4017
4018 kref_get(&tgt->kref);
4019 evt = ibmvfc_get_event(&vhost->crq);
4020 vhost->discovery_threads++;
4021 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT);
4022 evt->tgt = tgt;
4023 prli = &evt->iu.prli;
4024 memset(prli, 0, sizeof(*prli));
4025 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
4026 prli->common.version = cpu_to_be32(2);
4027 prli->target_wwpn = cpu_to_be64(tgt->wwpn);
4028 } else {
4029 prli->common.version = cpu_to_be32(1);
4030 }
4031 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN);
4032 prli->common.length = cpu_to_be16(sizeof(*prli));
4033 prli->scsi_id = cpu_to_be64(tgt->scsi_id);
4034
4035 prli->parms.type = IBMVFC_SCSI_FCP_TYPE;
4036 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR);
4037 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC);
4038 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED);
4039
4040 if (cls3_error)
4041 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY);
4042
4043 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4044 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4045 vhost->discovery_threads--;
4046 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4047 kref_put(&tgt->kref, ibmvfc_release_tgt);
4048 } else
4049 tgt_dbg(tgt, "Sent process login\n");
4050}
4051
4052
4053
4054
4055
4056
4057static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt)
4058{
4059 struct ibmvfc_target *tgt = evt->tgt;
4060 struct ibmvfc_host *vhost = evt->vhost;
4061 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi;
4062 u32 status = be16_to_cpu(rsp->common.status);
4063 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4064
4065 vhost->discovery_threads--;
4066 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4067 switch (status) {
4068 case IBMVFC_MAD_SUCCESS:
4069 tgt_dbg(tgt, "Port Login succeeded\n");
4070 if (tgt->ids.port_name &&
4071 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) {
4072 vhost->reinit = 1;
4073 tgt_dbg(tgt, "Port re-init required\n");
4074 break;
4075 }
4076 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
4077 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
4078 tgt->ids.port_id = tgt->scsi_id;
4079 memcpy(&tgt->service_parms, &rsp->service_parms,
4080 sizeof(tgt->service_parms));
4081 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
4082 sizeof(tgt->service_parms_change));
4083 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
4084 break;
4085 case IBMVFC_MAD_DRIVER_FAILED:
4086 break;
4087 case IBMVFC_MAD_CRQ_ERROR:
4088 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
4089 break;
4090 case IBMVFC_MAD_FAILED:
4091 default:
4092 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4093 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
4094 else
4095 ibmvfc_del_tgt(tgt);
4096
4097 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
4098 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4099 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
4100 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
4101 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status);
4102 break;
4103 }
4104
4105 kref_put(&tgt->kref, ibmvfc_release_tgt);
4106 ibmvfc_free_event(evt);
4107 wake_up(&vhost->work_wait_q);
4108}
4109
4110
4111
4112
4113
4114
4115static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt)
4116{
4117 struct ibmvfc_port_login *plogi;
4118 struct ibmvfc_host *vhost = tgt->vhost;
4119 struct ibmvfc_event *evt;
4120
4121 if (vhost->discovery_threads >= disc_threads)
4122 return;
4123
4124 kref_get(&tgt->kref);
4125 tgt->logo_rcvd = 0;
4126 evt = ibmvfc_get_event(&vhost->crq);
4127 vhost->discovery_threads++;
4128 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4129 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT);
4130 evt->tgt = tgt;
4131