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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 plogi = &evt->iu.plogi;
4132 memset(plogi, 0, sizeof(*plogi));
4133 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
4134 plogi->common.version = cpu_to_be32(2);
4135 plogi->target_wwpn = cpu_to_be64(tgt->wwpn);
4136 } else {
4137 plogi->common.version = cpu_to_be32(1);
4138 }
4139 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN);
4140 plogi->common.length = cpu_to_be16(sizeof(*plogi));
4141 plogi->scsi_id = cpu_to_be64(tgt->scsi_id);
4142
4143 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4144 vhost->discovery_threads--;
4145 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4146 kref_put(&tgt->kref, ibmvfc_release_tgt);
4147 } else
4148 tgt_dbg(tgt, "Sent port login\n");
4149}
4150
4151
4152
4153
4154
4155
4156static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt)
4157{
4158 struct ibmvfc_target *tgt = evt->tgt;
4159 struct ibmvfc_host *vhost = evt->vhost;
4160 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout;
4161 u32 status = be16_to_cpu(rsp->common.status);
4162
4163 vhost->discovery_threads--;
4164 ibmvfc_free_event(evt);
4165 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4166
4167 switch (status) {
4168 case IBMVFC_MAD_SUCCESS:
4169 tgt_dbg(tgt, "Implicit Logout succeeded\n");
4170 break;
4171 case IBMVFC_MAD_DRIVER_FAILED:
4172 kref_put(&tgt->kref, ibmvfc_release_tgt);
4173 wake_up(&vhost->work_wait_q);
4174 return;
4175 case IBMVFC_MAD_FAILED:
4176 default:
4177 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status);
4178 break;
4179 }
4180
4181 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi);
4182 kref_put(&tgt->kref, ibmvfc_release_tgt);
4183 wake_up(&vhost->work_wait_q);
4184}
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt,
4195 void (*done) (struct ibmvfc_event *))
4196{
4197 struct ibmvfc_implicit_logout *mad;
4198 struct ibmvfc_host *vhost = tgt->vhost;
4199 struct ibmvfc_event *evt;
4200
4201 kref_get(&tgt->kref);
4202 evt = ibmvfc_get_event(&vhost->crq);
4203 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT);
4204 evt->tgt = tgt;
4205 mad = &evt->iu.implicit_logout;
4206 memset(mad, 0, sizeof(*mad));
4207 mad->common.version = cpu_to_be32(1);
4208 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT);
4209 mad->common.length = cpu_to_be16(sizeof(*mad));
4210 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id);
4211 return evt;
4212}
4213
4214
4215
4216
4217
4218
4219static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
4220{
4221 struct ibmvfc_host *vhost = tgt->vhost;
4222 struct ibmvfc_event *evt;
4223
4224 if (vhost->discovery_threads >= disc_threads)
4225 return;
4226
4227 vhost->discovery_threads++;
4228 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt,
4229 ibmvfc_tgt_implicit_logout_done);
4230
4231 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4232 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4233 vhost->discovery_threads--;
4234 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4235 kref_put(&tgt->kref, ibmvfc_release_tgt);
4236 } else
4237 tgt_dbg(tgt, "Sent Implicit Logout\n");
4238}
4239
4240
4241
4242
4243
4244
4245static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt)
4246{
4247 struct ibmvfc_target *tgt = evt->tgt;
4248 struct ibmvfc_host *vhost = evt->vhost;
4249 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
4250 u32 status = be16_to_cpu(mad->common.status);
4251
4252 vhost->discovery_threads--;
4253 ibmvfc_free_event(evt);
4254
4255
4256
4257
4258
4259
4260
4261
4262 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE)
4263 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4264 else
4265 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT);
4266
4267 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed");
4268 kref_put(&tgt->kref, ibmvfc_release_tgt);
4269 wake_up(&vhost->work_wait_q);
4270}
4271
4272
4273
4274
4275
4276
4277static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt)
4278{
4279 struct ibmvfc_host *vhost = tgt->vhost;
4280 struct ibmvfc_event *evt;
4281
4282 if (!vhost->logged_in) {
4283 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4284 return;
4285 }
4286
4287 if (vhost->discovery_threads >= disc_threads)
4288 return;
4289
4290 vhost->discovery_threads++;
4291 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt,
4292 ibmvfc_tgt_implicit_logout_and_del_done);
4293
4294 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT);
4295 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4296 vhost->discovery_threads--;
4297 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4298 kref_put(&tgt->kref, ibmvfc_release_tgt);
4299 } else
4300 tgt_dbg(tgt, "Sent Implicit Logout\n");
4301}
4302
4303
4304
4305
4306
4307
4308static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt)
4309{
4310 struct ibmvfc_target *tgt = evt->tgt;
4311 struct ibmvfc_host *vhost = evt->vhost;
4312 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login;
4313 u32 status = be16_to_cpu(rsp->common.status);
4314 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4315
4316 vhost->discovery_threads--;
4317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4318 switch (status) {
4319 case IBMVFC_MAD_SUCCESS:
4320 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id);
4321 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name);
4322 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name);
4323 tgt->scsi_id = tgt->new_scsi_id;
4324 tgt->ids.port_id = tgt->scsi_id;
4325 memcpy(&tgt->service_parms, &rsp->service_parms,
4326 sizeof(tgt->service_parms));
4327 memcpy(&tgt->service_parms_change, &rsp->service_parms_change,
4328 sizeof(tgt->service_parms_change));
4329 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli);
4330 break;
4331 case IBMVFC_MAD_DRIVER_FAILED:
4332 break;
4333 case IBMVFC_MAD_CRQ_ERROR:
4334 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login);
4335 break;
4336 case IBMVFC_MAD_FAILED:
4337 default:
4338 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login);
4339
4340 tgt_log(tgt, level,
4341 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n",
4342 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags),
4343 status);
4344 break;
4345 }
4346
4347 kref_put(&tgt->kref, ibmvfc_release_tgt);
4348 ibmvfc_free_event(evt);
4349 wake_up(&vhost->work_wait_q);
4350}
4351
4352
4353
4354
4355
4356
4357
4358static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt)
4359{
4360 struct ibmvfc_host *vhost = tgt->vhost;
4361 struct ibmvfc_move_login *move;
4362 struct ibmvfc_event *evt;
4363
4364 if (vhost->discovery_threads >= disc_threads)
4365 return;
4366
4367 kref_get(&tgt->kref);
4368 evt = ibmvfc_get_event(&vhost->crq);
4369 vhost->discovery_threads++;
4370 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4371 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT);
4372 evt->tgt = tgt;
4373 move = &evt->iu.move_login;
4374 memset(move, 0, sizeof(*move));
4375 move->common.version = cpu_to_be32(1);
4376 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN);
4377 move->common.length = cpu_to_be16(sizeof(*move));
4378
4379 move->old_scsi_id = cpu_to_be64(tgt->scsi_id);
4380 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id);
4381 move->wwpn = cpu_to_be64(tgt->wwpn);
4382 move->node_name = cpu_to_be64(tgt->ids.node_name);
4383
4384 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4385 vhost->discovery_threads--;
4386 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
4387 kref_put(&tgt->kref, ibmvfc_release_tgt);
4388 } else
4389 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id);
4390}
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
4401 struct ibmvfc_target *tgt)
4402{
4403 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name)
4404 return 1;
4405 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name)
4406 return 1;
4407 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id)
4408 return 1;
4409 return 0;
4410}
4411
4412
4413
4414
4415
4416
4417static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
4418{
4419 struct ibmvfc_target *tgt = evt->tgt;
4420 struct ibmvfc_host *vhost = evt->vhost;
4421 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
4422 u32 status = be16_to_cpu(mad->common.status);
4423 u8 fc_reason, fc_explain;
4424
4425 vhost->discovery_threads--;
4426 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4427 del_timer(&tgt->timer);
4428
4429 switch (status) {
4430 case IBMVFC_MAD_SUCCESS:
4431 tgt_dbg(tgt, "ADISC succeeded\n");
4432 if (ibmvfc_adisc_needs_plogi(mad, tgt))
4433 ibmvfc_del_tgt(tgt);
4434 break;
4435 case IBMVFC_MAD_DRIVER_FAILED:
4436 break;
4437 case IBMVFC_MAD_FAILED:
4438 default:
4439 ibmvfc_del_tgt(tgt);
4440 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16;
4441 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8;
4442 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
4443 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)),
4444 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error),
4445 ibmvfc_get_fc_type(fc_reason), fc_reason,
4446 ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
4447 break;
4448 }
4449
4450 kref_put(&tgt->kref, ibmvfc_release_tgt);
4451 ibmvfc_free_event(evt);
4452 wake_up(&vhost->work_wait_q);
4453}
4454
4455
4456
4457
4458
4459
4460static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
4461{
4462 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
4463
4464 memset(mad, 0, sizeof(*mad));
4465 mad->common.version = cpu_to_be32(1);
4466 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU);
4467 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu));
4468 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
4469 offsetof(struct ibmvfc_passthru_mad, iu));
4470 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu));
4471 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload));
4472 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response));
4473 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
4474 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
4475 offsetof(struct ibmvfc_passthru_fc_iu, payload));
4476 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload));
4477 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) +
4478 offsetof(struct ibmvfc_passthru_mad, fc_iu) +
4479 offsetof(struct ibmvfc_passthru_fc_iu, response));
4480 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response));
4481}
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
4494{
4495 struct ibmvfc_host *vhost = evt->vhost;
4496 struct ibmvfc_target *tgt = evt->tgt;
4497
4498 tgt_dbg(tgt, "ADISC cancel complete\n");
4499 vhost->abort_threads--;
4500 ibmvfc_free_event(evt);
4501 kref_put(&tgt->kref, ibmvfc_release_tgt);
4502 wake_up(&vhost->work_wait_q);
4503}
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513static void ibmvfc_adisc_timeout(struct timer_list *t)
4514{
4515 struct ibmvfc_target *tgt = from_timer(tgt, t, timer);
4516 struct ibmvfc_host *vhost = tgt->vhost;
4517 struct ibmvfc_event *evt;
4518 struct ibmvfc_tmf *tmf;
4519 unsigned long flags;
4520 int rc;
4521
4522 tgt_dbg(tgt, "ADISC timeout\n");
4523 spin_lock_irqsave(vhost->host->host_lock, flags);
4524 if (vhost->abort_threads >= disc_threads ||
4525 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
4526 vhost->state != IBMVFC_INITIALIZING ||
4527 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
4528 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4529 return;
4530 }
4531
4532 vhost->abort_threads++;
4533 kref_get(&tgt->kref);
4534 evt = ibmvfc_get_event(&vhost->crq);
4535 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
4536
4537 evt->tgt = tgt;
4538 tmf = &evt->iu.tmf;
4539 memset(tmf, 0, sizeof(*tmf));
4540 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
4541 tmf->common.version = cpu_to_be32(2);
4542 tmf->target_wwpn = cpu_to_be64(tgt->wwpn);
4543 } else {
4544 tmf->common.version = cpu_to_be32(1);
4545 }
4546 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
4547 tmf->common.length = cpu_to_be16(sizeof(*tmf));
4548 tmf->scsi_id = cpu_to_be64(tgt->scsi_id);
4549 tmf->cancel_key = cpu_to_be32(tgt->cancel_key);
4550
4551 rc = ibmvfc_send_event(evt, vhost, default_timeout);
4552
4553 if (rc) {
4554 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
4555 vhost->abort_threads--;
4556 kref_put(&tgt->kref, ibmvfc_release_tgt);
4557 __ibmvfc_reset_host(vhost);
4558 } else
4559 tgt_dbg(tgt, "Attempting to cancel ADISC\n");
4560 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4561}
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
4575{
4576 struct ibmvfc_passthru_mad *mad;
4577 struct ibmvfc_host *vhost = tgt->vhost;
4578 struct ibmvfc_event *evt;
4579
4580 if (vhost->discovery_threads >= disc_threads)
4581 return;
4582
4583 kref_get(&tgt->kref);
4584 evt = ibmvfc_get_event(&vhost->crq);
4585 vhost->discovery_threads++;
4586 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
4587 evt->tgt = tgt;
4588
4589 ibmvfc_init_passthru(evt);
4590 mad = &evt->iu.passthru;
4591 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS);
4592 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id);
4593 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key);
4594
4595 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC);
4596 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
4597 sizeof(vhost->login_buf->resp.port_name));
4598 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
4599 sizeof(vhost->login_buf->resp.node_name));
4600 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff);
4601
4602 if (timer_pending(&tgt->timer))
4603 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
4604 else {
4605 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
4606 add_timer(&tgt->timer);
4607 }
4608
4609 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4610 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
4611 vhost->discovery_threads--;
4612 del_timer(&tgt->timer);
4613 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4614 kref_put(&tgt->kref, ibmvfc_release_tgt);
4615 } else
4616 tgt_dbg(tgt, "Sent ADISC\n");
4617}
4618
4619
4620
4621
4622
4623
4624static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
4625{
4626 struct ibmvfc_target *tgt = evt->tgt;
4627 struct ibmvfc_host *vhost = evt->vhost;
4628 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt;
4629 u32 status = be16_to_cpu(rsp->common.status);
4630 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4631
4632 vhost->discovery_threads--;
4633 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4634 switch (status) {
4635 case IBMVFC_MAD_SUCCESS:
4636 tgt_dbg(tgt, "Query Target succeeded\n");
4637 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id)
4638 ibmvfc_del_tgt(tgt);
4639 else
4640 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
4641 break;
4642 case IBMVFC_MAD_DRIVER_FAILED:
4643 break;
4644 case IBMVFC_MAD_CRQ_ERROR:
4645 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
4646 break;
4647 case IBMVFC_MAD_FAILED:
4648 default:
4649 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED &&
4650 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ &&
4651 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG)
4652 ibmvfc_del_tgt(tgt);
4653 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
4654 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
4655 else
4656 ibmvfc_del_tgt(tgt);
4657
4658 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
4659 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4660 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error),
4661 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type),
4662 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain),
4663 status);
4664 break;
4665 }
4666
4667 kref_put(&tgt->kref, ibmvfc_release_tgt);
4668 ibmvfc_free_event(evt);
4669 wake_up(&vhost->work_wait_q);
4670}
4671
4672
4673
4674
4675
4676
4677static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt)
4678{
4679 struct ibmvfc_query_tgt *query_tgt;
4680 struct ibmvfc_host *vhost = tgt->vhost;
4681 struct ibmvfc_event *evt;
4682
4683 if (vhost->discovery_threads >= disc_threads)
4684 return;
4685
4686 kref_get(&tgt->kref);
4687 evt = ibmvfc_get_event(&vhost->crq);
4688 vhost->discovery_threads++;
4689 evt->tgt = tgt;
4690 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT);
4691 query_tgt = &evt->iu.query_tgt;
4692 memset(query_tgt, 0, sizeof(*query_tgt));
4693 query_tgt->common.version = cpu_to_be32(1);
4694 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET);
4695 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt));
4696 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name);
4697
4698 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
4699 if (ibmvfc_send_event(evt, vhost, default_timeout)) {
4700 vhost->discovery_threads--;
4701 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
4702 kref_put(&tgt->kref, ibmvfc_release_tgt);
4703 } else
4704 tgt_dbg(tgt, "Sent Query Target\n");
4705}
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715static int ibmvfc_alloc_target(struct ibmvfc_host *vhost,
4716 struct ibmvfc_discover_targets_entry *target)
4717{
4718 struct ibmvfc_target *stgt = NULL;
4719 struct ibmvfc_target *wtgt = NULL;
4720 struct ibmvfc_target *tgt;
4721 unsigned long flags;
4722 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK;
4723 u64 wwpn = be64_to_cpu(target->wwpn);
4724
4725
4726 spin_lock_irqsave(vhost->host->host_lock, flags);
4727 list_for_each_entry(tgt, &vhost->targets, queue) {
4728 if (tgt->wwpn == wwpn) {
4729 wtgt = tgt;
4730 break;
4731 }
4732 }
4733
4734 list_for_each_entry(tgt, &vhost->targets, queue) {
4735 if (tgt->scsi_id == scsi_id) {
4736 stgt = tgt;
4737 break;
4738 }
4739 }
4740
4741 if (wtgt && !stgt) {
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) {
4756 if (wtgt->move_login) {
4757
4758
4759
4760
4761
4762
4763 wtgt->new_scsi_id = scsi_id;
4764 wtgt->action = IBMVFC_TGT_ACTION_INIT;
4765 wtgt->init_retries = 0;
4766 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login);
4767 }
4768 goto unlock_out;
4769 } else {
4770 tgt_err(wtgt, "Unexpected target state: %d, %p\n",
4771 wtgt->action, wtgt->rport);
4772 }
4773 } else if (stgt) {
4774 if (tgt->need_login)
4775 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
4776 goto unlock_out;
4777 }
4778 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4779
4780 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
4781 memset(tgt, 0, sizeof(*tgt));
4782 tgt->scsi_id = scsi_id;
4783 tgt->wwpn = wwpn;
4784 tgt->vhost = vhost;
4785 tgt->need_login = 1;
4786 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0);
4787 kref_init(&tgt->kref);
4788 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
4789 spin_lock_irqsave(vhost->host->host_lock, flags);
4790 tgt->cancel_key = vhost->task_set++;
4791 list_add_tail(&tgt->queue, &vhost->targets);
4792
4793unlock_out:
4794 spin_unlock_irqrestore(vhost->host->host_lock, flags);
4795 return 0;
4796}
4797
4798
4799
4800
4801
4802
4803
4804
4805static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost)
4806{
4807 int i, rc;
4808
4809 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++)
4810 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]);
4811
4812 return rc;
4813}
4814
4815
4816
4817
4818
4819
4820static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt)
4821{
4822 struct ibmvfc_host *vhost = evt->vhost;
4823 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets;
4824 u32 mad_status = be16_to_cpu(rsp->common.status);
4825 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4826
4827 switch (mad_status) {
4828 case IBMVFC_MAD_SUCCESS:
4829 ibmvfc_dbg(vhost, "Discover Targets succeeded\n");
4830 vhost->num_targets = be32_to_cpu(rsp->num_written);
4831 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS);
4832 break;
4833 case IBMVFC_MAD_FAILED:
4834 level += ibmvfc_retry_host_init(vhost);
4835 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
4836 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
4837 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
4838 break;
4839 case IBMVFC_MAD_DRIVER_FAILED:
4840 break;
4841 default:
4842 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status);
4843 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4844 break;
4845 }
4846
4847 ibmvfc_free_event(evt);
4848 wake_up(&vhost->work_wait_q);
4849}
4850
4851
4852
4853
4854
4855
4856static void ibmvfc_discover_targets(struct ibmvfc_host *vhost)
4857{
4858 struct ibmvfc_discover_targets *mad;
4859 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
4860
4861 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT);
4862 mad = &evt->iu.discover_targets;
4863 memset(mad, 0, sizeof(*mad));
4864 mad->common.version = cpu_to_be32(1);
4865 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS);
4866 mad->common.length = cpu_to_be16(sizeof(*mad));
4867 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz);
4868 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma);
4869 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz);
4870 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST);
4871 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4872
4873 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4874 ibmvfc_dbg(vhost, "Sent discover targets\n");
4875 else
4876 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4877}
4878
4879static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt)
4880{
4881 struct ibmvfc_host *vhost = evt->vhost;
4882 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf;
4883 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs;
4884 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status);
4885 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4886 int flags, active_queues, i;
4887
4888 ibmvfc_free_event(evt);
4889
4890 switch (mad_status) {
4891 case IBMVFC_MAD_SUCCESS:
4892 ibmvfc_dbg(vhost, "Channel Setup succeeded\n");
4893 flags = be32_to_cpu(setup->flags);
4894 vhost->do_enquiry = 0;
4895 active_queues = be32_to_cpu(setup->num_scsi_subq_channels);
4896 scrqs->active_queues = active_queues;
4897
4898 if (flags & IBMVFC_CHANNELS_CANCELED) {
4899 ibmvfc_dbg(vhost, "Channels Canceled\n");
4900 vhost->using_channels = 0;
4901 } else {
4902 if (active_queues)
4903 vhost->using_channels = 1;
4904 for (i = 0; i < active_queues; i++)
4905 scrqs->scrqs[i].vios_cookie =
4906 be64_to_cpu(setup->channel_handles[i]);
4907
4908 ibmvfc_dbg(vhost, "Using %u channels\n",
4909 vhost->scsi_scrqs.active_queues);
4910 }
4911 break;
4912 case IBMVFC_MAD_FAILED:
4913 level += ibmvfc_retry_host_init(vhost);
4914 ibmvfc_log(vhost, level, "Channel Setup failed\n");
4915 fallthrough;
4916 case IBMVFC_MAD_DRIVER_FAILED:
4917 return;
4918 default:
4919 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n",
4920 mad_status);
4921 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4922 return;
4923 }
4924
4925 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
4926 wake_up(&vhost->work_wait_q);
4927}
4928
4929static void ibmvfc_channel_setup(struct ibmvfc_host *vhost)
4930{
4931 struct ibmvfc_channel_setup_mad *mad;
4932 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf;
4933 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
4934 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs;
4935 unsigned int num_channels =
4936 min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels);
4937 int i;
4938
4939 memset(setup_buf, 0, sizeof(*setup_buf));
4940 if (num_channels == 0)
4941 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS);
4942 else {
4943 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels);
4944 for (i = 0; i < num_channels; i++)
4945 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie);
4946 }
4947
4948 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT);
4949 mad = &evt->iu.channel_setup;
4950 memset(mad, 0, sizeof(*mad));
4951 mad->common.version = cpu_to_be32(1);
4952 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP);
4953 mad->common.length = cpu_to_be16(sizeof(*mad));
4954 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma);
4955 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf));
4956
4957 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
4958
4959 if (!ibmvfc_send_event(evt, vhost, default_timeout))
4960 ibmvfc_dbg(vhost, "Sent channel setup\n");
4961 else
4962 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
4963}
4964
4965static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt)
4966{
4967 struct ibmvfc_host *vhost = evt->vhost;
4968 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry;
4969 u32 mad_status = be16_to_cpu(rsp->common.status);
4970 int level = IBMVFC_DEFAULT_LOG_LEVEL;
4971
4972 switch (mad_status) {
4973 case IBMVFC_MAD_SUCCESS:
4974 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n");
4975 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels);
4976 ibmvfc_free_event(evt);
4977 break;
4978 case IBMVFC_MAD_FAILED:
4979 level += ibmvfc_retry_host_init(vhost);
4980 ibmvfc_log(vhost, level, "Channel Enquiry failed\n");
4981 fallthrough;
4982 case IBMVFC_MAD_DRIVER_FAILED:
4983 ibmvfc_free_event(evt);
4984 return;
4985 default:
4986 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n",
4987 mad_status);
4988 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
4989 ibmvfc_free_event(evt);
4990 return;
4991 }
4992
4993 ibmvfc_channel_setup(vhost);
4994}
4995
4996static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost)
4997{
4998 struct ibmvfc_channel_enquiry *mad;
4999 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
5000
5001 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT);
5002 mad = &evt->iu.channel_enquiry;
5003 memset(mad, 0, sizeof(*mad));
5004 mad->common.version = cpu_to_be32(1);
5005 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY);
5006 mad->common.length = cpu_to_be16(sizeof(*mad));
5007
5008 if (mig_channels_only)
5009 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT);
5010 if (mig_no_less_channels)
5011 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT);
5012
5013 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
5014
5015 if (!ibmvfc_send_event(evt, vhost, default_timeout))
5016 ibmvfc_dbg(vhost, "Send channel enquiry\n");
5017 else
5018 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5019}
5020
5021
5022
5023
5024
5025
5026static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
5027{
5028 struct ibmvfc_host *vhost = evt->vhost;
5029 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status);
5030 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp;
5031 unsigned int npiv_max_sectors;
5032 int level = IBMVFC_DEFAULT_LOG_LEVEL;
5033
5034 switch (mad_status) {
5035 case IBMVFC_MAD_SUCCESS:
5036 ibmvfc_free_event(evt);
5037 break;
5038 case IBMVFC_MAD_FAILED:
5039 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)))
5040 level += ibmvfc_retry_host_init(vhost);
5041 else
5042 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5043 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
5044 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)),
5045 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error));
5046 ibmvfc_free_event(evt);
5047 return;
5048 case IBMVFC_MAD_CRQ_ERROR:
5049 ibmvfc_retry_host_init(vhost);
5050 fallthrough;
5051 case IBMVFC_MAD_DRIVER_FAILED:
5052 ibmvfc_free_event(evt);
5053 return;
5054 default:
5055 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status);
5056 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5057 ibmvfc_free_event(evt);
5058 return;
5059 }
5060
5061 vhost->client_migrated = 0;
5062
5063 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) {
5064 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n",
5065 rsp->flags);
5066 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5067 wake_up(&vhost->work_wait_q);
5068 return;
5069 }
5070
5071 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) {
5072 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n",
5073 rsp->max_cmds);
5074 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5075 wake_up(&vhost->work_wait_q);
5076 return;
5077 }
5078
5079 vhost->logged_in = 1;
5080 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS);
5081 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n",
5082 rsp->partition_name, rsp->device_name, rsp->port_loc_code,
5083 rsp->drc_name, npiv_max_sectors);
5084
5085 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name);
5086 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name);
5087 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name);
5088 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id);
5089 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV;
5090 fc_host_supported_classes(vhost->host) = 0;
5091 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000)
5092 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1;
5093 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000)
5094 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2;
5095 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000)
5096 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3;
5097 fc_host_maxframe_size(vhost->host) =
5098 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff;
5099
5100 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ;
5101 vhost->host->max_sectors = npiv_max_sectors;
5102
5103 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) {
5104 ibmvfc_channel_enquiry(vhost);
5105 } else {
5106 vhost->do_enquiry = 0;
5107 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
5108 wake_up(&vhost->work_wait_q);
5109 }
5110}
5111
5112
5113
5114
5115
5116
5117static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
5118{
5119 struct ibmvfc_npiv_login_mad *mad;
5120 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq);
5121
5122 ibmvfc_gather_partition_info(vhost);
5123 ibmvfc_set_login_info(vhost);
5124 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT);
5125
5126 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info));
5127 mad = &evt->iu.npiv_login;
5128 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad));
5129 mad->common.version = cpu_to_be32(1);
5130 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN);
5131 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad));
5132 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma);
5133 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf));
5134
5135 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
5136
5137 if (!ibmvfc_send_event(evt, vhost, default_timeout))
5138 ibmvfc_dbg(vhost, "Sent NPIV login\n");
5139 else
5140 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5141}
5142
5143
5144
5145
5146
5147
5148static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
5149{
5150 struct ibmvfc_host *vhost = evt->vhost;
5151 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status);
5152
5153 ibmvfc_free_event(evt);
5154
5155 switch (mad_status) {
5156 case IBMVFC_MAD_SUCCESS:
5157 if (list_empty(&vhost->crq.sent) &&
5158 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
5159 ibmvfc_init_host(vhost);
5160 return;
5161 }
5162 break;
5163 case IBMVFC_MAD_FAILED:
5164 case IBMVFC_MAD_NOT_SUPPORTED:
5165 case IBMVFC_MAD_CRQ_ERROR:
5166 case IBMVFC_MAD_DRIVER_FAILED:
5167 default:
5168 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
5169 break;
5170 }
5171
5172 ibmvfc_hard_reset_host(vhost);
5173}
5174
5175
5176
5177
5178
5179
5180static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
5181{
5182 struct ibmvfc_npiv_logout_mad *mad;
5183 struct ibmvfc_event *evt;
5184
5185 evt = ibmvfc_get_event(&vhost->crq);
5186 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
5187
5188 mad = &evt->iu.npiv_logout;
5189 memset(mad, 0, sizeof(*mad));
5190 mad->common.version = cpu_to_be32(1);
5191 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT);
5192 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad));
5193
5194 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
5195
5196 if (!ibmvfc_send_event(evt, vhost, default_timeout))
5197 ibmvfc_dbg(vhost, "Sent NPIV logout\n");
5198 else
5199 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5200}
5201
5202
5203
5204
5205
5206
5207
5208
5209static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost)
5210{
5211 struct ibmvfc_target *tgt;
5212
5213 list_for_each_entry(tgt, &vhost->targets, queue) {
5214 if (tgt->action == IBMVFC_TGT_ACTION_INIT ||
5215 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
5216 return 1;
5217 }
5218
5219 return 0;
5220}
5221
5222
5223
5224
5225
5226
5227
5228
5229static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost)
5230{
5231 struct ibmvfc_target *tgt;
5232
5233 list_for_each_entry(tgt, &vhost->targets, queue) {
5234 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT ||
5235 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT)
5236 return 1;
5237 }
5238 return 0;
5239}
5240
5241
5242
5243
5244
5245
5246
5247
5248static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
5249{
5250 struct ibmvfc_target *tgt;
5251
5252 if (kthread_should_stop())
5253 return 1;
5254 switch (vhost->action) {
5255 case IBMVFC_HOST_ACTION_NONE:
5256 case IBMVFC_HOST_ACTION_INIT_WAIT:
5257 case IBMVFC_HOST_ACTION_LOGO_WAIT:
5258 return 0;
5259 case IBMVFC_HOST_ACTION_TGT_INIT:
5260 case IBMVFC_HOST_ACTION_QUERY_TGTS:
5261 if (vhost->discovery_threads == disc_threads)
5262 return 0;
5263 list_for_each_entry(tgt, &vhost->targets, queue)
5264 if (tgt->action == IBMVFC_TGT_ACTION_INIT)
5265 return 1;
5266 list_for_each_entry(tgt, &vhost->targets, queue)
5267 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT)
5268 return 0;
5269 return 1;
5270 case IBMVFC_HOST_ACTION_TGT_DEL:
5271 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
5272 if (vhost->discovery_threads == disc_threads)
5273 return 0;
5274 list_for_each_entry(tgt, &vhost->targets, queue)
5275 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT)
5276 return 1;
5277 list_for_each_entry(tgt, &vhost->targets, queue)
5278 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT)
5279 return 0;
5280 return 1;
5281 case IBMVFC_HOST_ACTION_LOGO:
5282 case IBMVFC_HOST_ACTION_INIT:
5283 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
5284 case IBMVFC_HOST_ACTION_QUERY:
5285 case IBMVFC_HOST_ACTION_RESET:
5286 case IBMVFC_HOST_ACTION_REENABLE:
5287 default:
5288 break;
5289 }
5290
5291 return 1;
5292}
5293
5294
5295
5296
5297
5298
5299
5300
5301static int ibmvfc_work_to_do(struct ibmvfc_host *vhost)
5302{
5303 unsigned long flags;
5304 int rc;
5305
5306 spin_lock_irqsave(vhost->host->host_lock, flags);
5307 rc = __ibmvfc_work_to_do(vhost);
5308 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5309 return rc;
5310}
5311
5312
5313
5314
5315
5316
5317
5318static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events)
5319{
5320 if (events & IBMVFC_AE_RSCN)
5321 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0);
5322 if ((events & IBMVFC_AE_LINKDOWN) &&
5323 vhost->state >= IBMVFC_HALTED)
5324 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
5325 if ((events & IBMVFC_AE_LINKUP) &&
5326 vhost->state == IBMVFC_INITIALIZING)
5327 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0);
5328}
5329
5330
5331
5332
5333
5334
5335static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
5336{
5337 struct ibmvfc_host *vhost = tgt->vhost;
5338 struct fc_rport *rport;
5339 unsigned long flags;
5340
5341 tgt_dbg(tgt, "Adding rport\n");
5342 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids);
5343 spin_lock_irqsave(vhost->host->host_lock, flags);
5344
5345 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
5346 tgt_dbg(tgt, "Deleting rport\n");
5347 list_del(&tgt->queue);
5348 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
5349 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5350 fc_remote_port_delete(rport);
5351 del_timer_sync(&tgt->timer);
5352 kref_put(&tgt->kref, ibmvfc_release_tgt);
5353 return;
5354 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) {
5355 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n");
5356 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT);
5357 tgt->rport = NULL;
5358 tgt->init_retries = 0;
5359 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5360 fc_remote_port_delete(rport);
5361 return;
5362 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
5363 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5364 return;
5365 }
5366
5367 if (rport) {
5368 tgt_dbg(tgt, "rport add succeeded\n");
5369 tgt->rport = rport;
5370 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff;
5371 rport->supported_classes = 0;
5372 tgt->target_id = rport->scsi_target_id;
5373 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000)
5374 rport->supported_classes |= FC_COS_CLASS1;
5375 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000)
5376 rport->supported_classes |= FC_COS_CLASS2;
5377 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
5378 rport->supported_classes |= FC_COS_CLASS3;
5379 if (rport->rqst_q)
5380 blk_queue_max_segments(rport->rqst_q, 1);
5381 } else
5382 tgt_dbg(tgt, "rport add failed\n");
5383 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5384}
5385
5386
5387
5388
5389
5390
5391static void ibmvfc_do_work(struct ibmvfc_host *vhost)
5392{
5393 struct ibmvfc_target *tgt;
5394 unsigned long flags;
5395 struct fc_rport *rport;
5396 LIST_HEAD(purge);
5397 int rc;
5398
5399 ibmvfc_log_ae(vhost, vhost->events_to_log);
5400 spin_lock_irqsave(vhost->host->host_lock, flags);
5401 vhost->events_to_log = 0;
5402 switch (vhost->action) {
5403 case IBMVFC_HOST_ACTION_NONE:
5404 case IBMVFC_HOST_ACTION_LOGO_WAIT:
5405 case IBMVFC_HOST_ACTION_INIT_WAIT:
5406 break;
5407 case IBMVFC_HOST_ACTION_RESET:
5408 list_splice_init(&vhost->purge, &purge);
5409 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5410 ibmvfc_complete_purge(&purge);
5411 rc = ibmvfc_reset_crq(vhost);
5412
5413 spin_lock_irqsave(vhost->host->host_lock, flags);
5414 if (!rc || rc == H_CLOSED)
5415 vio_enable_interrupts(to_vio_dev(vhost->dev));
5416 if (vhost->action == IBMVFC_HOST_ACTION_RESET) {
5417
5418
5419
5420
5421
5422
5423 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
5424
5425 if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
5426 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
5427 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5428 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
5429 }
5430 }
5431 break;
5432 case IBMVFC_HOST_ACTION_REENABLE:
5433 list_splice_init(&vhost->purge, &purge);
5434 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5435 ibmvfc_complete_purge(&purge);
5436 rc = ibmvfc_reenable_crq_queue(vhost);
5437
5438 spin_lock_irqsave(vhost->host->host_lock, flags);
5439 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) {
5440
5441
5442
5443
5444
5445
5446 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
5447 if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
5448 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
5449 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
5450 }
5451 }
5452 break;
5453 case IBMVFC_HOST_ACTION_LOGO:
5454 vhost->job_step(vhost);
5455 break;
5456 case IBMVFC_HOST_ACTION_INIT:
5457 BUG_ON(vhost->state != IBMVFC_INITIALIZING);
5458 if (vhost->delay_init) {
5459 vhost->delay_init = 0;
5460 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5461 ssleep(15);
5462 return;
5463 } else
5464 vhost->job_step(vhost);
5465 break;
5466 case IBMVFC_HOST_ACTION_QUERY:
5467 list_for_each_entry(tgt, &vhost->targets, queue)
5468 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target);
5469 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS);
5470 break;
5471 case IBMVFC_HOST_ACTION_QUERY_TGTS:
5472 list_for_each_entry(tgt, &vhost->targets, queue) {
5473 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
5474 tgt->job_step(tgt);
5475 break;
5476 }
5477 }
5478
5479 if (!ibmvfc_dev_init_to_do(vhost))
5480 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL);
5481 break;
5482 case IBMVFC_HOST_ACTION_TGT_DEL:
5483 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
5484 list_for_each_entry(tgt, &vhost->targets, queue) {
5485 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) {
5486 tgt->job_step(tgt);
5487 break;
5488 }
5489 }
5490
5491 if (ibmvfc_dev_logo_to_do(vhost)) {
5492 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5493 return;
5494 }
5495
5496 list_for_each_entry(tgt, &vhost->targets, queue) {
5497 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
5498 tgt_dbg(tgt, "Deleting rport\n");
5499 rport = tgt->rport;
5500 tgt->rport = NULL;
5501 list_del(&tgt->queue);
5502 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
5503 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5504 if (rport)
5505 fc_remote_port_delete(rport);
5506 del_timer_sync(&tgt->timer);
5507 kref_put(&tgt->kref, ibmvfc_release_tgt);
5508 return;
5509 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) {
5510 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n");
5511 rport = tgt->rport;
5512 tgt->rport = NULL;
5513 tgt->init_retries = 0;
5514 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT);
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525 if (rport && rport->fast_io_fail_tmo == -1)
5526 tgt->move_login = 1;
5527 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5528 if (rport)
5529 fc_remote_port_delete(rport);
5530 return;
5531 }
5532 }
5533
5534 if (vhost->state == IBMVFC_INITIALIZING) {
5535 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
5536 if (vhost->reinit) {
5537 vhost->reinit = 0;
5538 scsi_block_requests(vhost->host);
5539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
5540 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5541 } else {
5542 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
5543 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
5544 wake_up(&vhost->init_wait_q);
5545 schedule_work(&vhost->rport_add_work_q);
5546 vhost->init_retries = 0;
5547 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5548 scsi_unblock_requests(vhost->host);
5549 }
5550
5551 return;
5552 } else {
5553 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
5554 vhost->job_step = ibmvfc_discover_targets;
5555 }
5556 } else {
5557 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
5558 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5559 scsi_unblock_requests(vhost->host);
5560 wake_up(&vhost->init_wait_q);
5561 return;
5562 }
5563 break;
5564 case IBMVFC_HOST_ACTION_ALLOC_TGTS:
5565 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT);
5566 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5567 ibmvfc_alloc_targets(vhost);
5568 spin_lock_irqsave(vhost->host->host_lock, flags);
5569 break;
5570 case IBMVFC_HOST_ACTION_TGT_INIT:
5571 list_for_each_entry(tgt, &vhost->targets, queue) {
5572 if (tgt->action == IBMVFC_TGT_ACTION_INIT) {
5573 tgt->job_step(tgt);
5574 break;
5575 }
5576 }
5577
5578 if (!ibmvfc_dev_init_to_do(vhost))
5579 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
5580 break;
5581 default:
5582 break;
5583 }
5584
5585 spin_unlock_irqrestore(vhost->host->host_lock, flags);
5586}
5587
5588
5589
5590
5591
5592
5593
5594
5595static int ibmvfc_work(void *data)
5596{
5597 struct ibmvfc_host *vhost = data;
5598 int rc;
5599
5600 set_user_nice(current, MIN_NICE);
5601
5602 while (1) {
5603 rc = wait_event_interruptible(vhost->work_wait_q,
5604 ibmvfc_work_to_do(vhost));
5605
5606 BUG_ON(rc);
5607
5608 if (kthread_should_stop())
5609 break;
5610
5611 ibmvfc_do_work(vhost);
5612 }
5613
5614 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n");
5615 return 0;
5616}
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost,
5628 struct ibmvfc_queue *queue,
5629 enum ibmvfc_msg_fmt fmt)
5630{
5631 struct device *dev = vhost->dev;
5632 size_t fmt_size;
5633 unsigned int pool_size = 0;
5634
5635 ENTER;
5636 spin_lock_init(&queue->_lock);
5637 queue->q_lock = &queue->_lock;
5638
5639 switch (fmt) {
5640 case IBMVFC_CRQ_FMT:
5641 fmt_size = sizeof(*queue->msgs.crq);
5642 pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ;
5643 break;
5644 case IBMVFC_ASYNC_FMT:
5645 fmt_size = sizeof(*queue->msgs.async);
5646 break;
5647 case IBMVFC_SUB_CRQ_FMT:
5648 fmt_size = sizeof(*queue->msgs.scrq);
5649
5650 pool_size = max_requests + 1;
5651 break;
5652 default:
5653 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt);
5654 return -EINVAL;
5655 }
5656
5657 if (ibmvfc_init_event_pool(vhost, queue, pool_size)) {
5658 dev_err(dev, "Couldn't initialize event pool.\n");
5659 return -ENOMEM;
5660 }
5661
5662 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL);
5663 if (!queue->msgs.handle)
5664 return -ENOMEM;
5665
5666 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE,
5667 DMA_BIDIRECTIONAL);
5668
5669 if (dma_mapping_error(dev, queue->msg_token)) {
5670 free_page((unsigned long)queue->msgs.handle);
5671 queue->msgs.handle = NULL;
5672 return -ENOMEM;
5673 }
5674
5675 queue->cur = 0;
5676 queue->fmt = fmt;
5677 queue->size = PAGE_SIZE / fmt_size;
5678 return 0;
5679}
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
5692{
5693 int rc, retrc = -ENOMEM;
5694 struct device *dev = vhost->dev;
5695 struct vio_dev *vdev = to_vio_dev(dev);
5696 struct ibmvfc_queue *crq = &vhost->crq;
5697
5698 ENTER;
5699 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT))
5700 return -ENOMEM;
5701
5702 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5703 crq->msg_token, PAGE_SIZE);
5704
5705 if (rc == H_RESOURCE)
5706
5707 retrc = rc = ibmvfc_reset_crq(vhost);
5708
5709 if (rc == H_CLOSED)
5710 dev_warn(dev, "Partner adapter not ready\n");
5711 else if (rc) {
5712 dev_warn(dev, "Error %d opening adapter\n", rc);
5713 goto reg_crq_failed;
5714 }
5715
5716 retrc = 0;
5717
5718 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
5719
5720 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) {
5721 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc);
5722 goto req_irq_failed;
5723 }
5724
5725 if ((rc = vio_enable_interrupts(vdev))) {
5726 dev_err(dev, "Error %d enabling interrupts\n", rc);
5727 goto req_irq_failed;
5728 }
5729
5730 LEAVE;
5731 return retrc;
5732
5733req_irq_failed:
5734 tasklet_kill(&vhost->tasklet);
5735 do {
5736 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5737 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5738reg_crq_failed:
5739 ibmvfc_free_queue(vhost, crq);
5740 return retrc;
5741}
5742
5743static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost,
5744 int index)
5745{
5746 struct device *dev = vhost->dev;
5747 struct vio_dev *vdev = to_vio_dev(dev);
5748 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index];
5749 int rc = -ENOMEM;
5750
5751 ENTER;
5752
5753 if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT))
5754 return -ENOMEM;
5755
5756 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE,
5757 &scrq->cookie, &scrq->hw_irq);
5758
5759
5760 if (rc && rc != H_CLOSED) {
5761 dev_warn(dev, "Error registering sub-crq: %d\n", rc);
5762 if (rc == H_PARAMETER)
5763 dev_warn_once(dev, "Firmware may not support MQ\n");
5764 goto reg_failed;
5765 }
5766
5767 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
5768
5769 if (!scrq->irq) {
5770 rc = -EINVAL;
5771 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index);
5772 goto irq_failed;
5773 }
5774
5775 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d",
5776 vdev->unit_address, index);
5777 rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq);
5778
5779 if (rc) {
5780 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index);
5781 irq_dispose_mapping(scrq->irq);
5782 goto irq_failed;
5783 }
5784
5785 scrq->hwq_id = index;
5786 scrq->vhost = vhost;
5787
5788 LEAVE;
5789 return 0;
5790
5791irq_failed:
5792 do {
5793 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie);
5794 } while (rtas_busy_delay(rc));
5795reg_failed:
5796 ibmvfc_free_queue(vhost, scrq);
5797 LEAVE;
5798 return rc;
5799}
5800
5801static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index)
5802{
5803 struct device *dev = vhost->dev;
5804 struct vio_dev *vdev = to_vio_dev(dev);
5805 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index];
5806 long rc;
5807
5808 ENTER;
5809
5810 free_irq(scrq->irq, scrq);
5811 irq_dispose_mapping(scrq->irq);
5812 scrq->irq = 0;
5813
5814 do {
5815 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address,
5816 scrq->cookie);
5817 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5818
5819 if (rc)
5820 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc);
5821
5822 ibmvfc_free_queue(vhost, scrq);
5823 LEAVE;
5824}
5825
5826static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost)
5827{
5828 int i, j;
5829
5830 ENTER;
5831 if (!vhost->mq_enabled)
5832 return;
5833
5834 vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues,
5835 sizeof(*vhost->scsi_scrqs.scrqs),
5836 GFP_KERNEL);
5837 if (!vhost->scsi_scrqs.scrqs) {
5838 vhost->do_enquiry = 0;
5839 return;
5840 }
5841
5842 for (i = 0; i < nr_scsi_hw_queues; i++) {
5843 if (ibmvfc_register_scsi_channel(vhost, i)) {
5844 for (j = i; j > 0; j--)
5845 ibmvfc_deregister_scsi_channel(vhost, j - 1);
5846 kfree(vhost->scsi_scrqs.scrqs);
5847 vhost->scsi_scrqs.scrqs = NULL;
5848 vhost->scsi_scrqs.active_queues = 0;
5849 vhost->do_enquiry = 0;
5850 break;
5851 }
5852 }
5853
5854 LEAVE;
5855}
5856
5857static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost)
5858{
5859 int i;
5860
5861 ENTER;
5862 if (!vhost->scsi_scrqs.scrqs)
5863 return;
5864
5865 for (i = 0; i < nr_scsi_hw_queues; i++)
5866 ibmvfc_deregister_scsi_channel(vhost, i);
5867
5868 kfree(vhost->scsi_scrqs.scrqs);
5869 vhost->scsi_scrqs.scrqs = NULL;
5870 vhost->scsi_scrqs.active_queues = 0;
5871 LEAVE;
5872}
5873
5874
5875
5876
5877
5878
5879
5880
5881static void ibmvfc_free_mem(struct ibmvfc_host *vhost)
5882{
5883 struct ibmvfc_queue *async_q = &vhost->async_crq;
5884
5885 ENTER;
5886 mempool_destroy(vhost->tgt_pool);
5887 kfree(vhost->trace);
5888 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf,
5889 vhost->disc_buf_dma);
5890 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf),
5891 vhost->login_buf, vhost->login_buf_dma);
5892 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf),
5893 vhost->channel_setup_buf, vhost->channel_setup_dma);
5894 dma_pool_destroy(vhost->sg_pool);
5895 ibmvfc_free_queue(vhost, async_q);
5896 LEAVE;
5897}
5898
5899
5900
5901
5902
5903
5904
5905
5906static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
5907{
5908 struct ibmvfc_queue *async_q = &vhost->async_crq;
5909 struct device *dev = vhost->dev;
5910
5911 ENTER;
5912 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) {
5913 dev_err(dev, "Couldn't allocate/map async queue.\n");
5914 goto nomem;
5915 }
5916
5917 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev,
5918 SG_ALL * sizeof(struct srp_direct_buf),
5919 sizeof(struct srp_direct_buf), 0);
5920
5921 if (!vhost->sg_pool) {
5922 dev_err(dev, "Failed to allocate sg pool\n");
5923 goto unmap_async_crq;
5924 }
5925
5926 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf),
5927 &vhost->login_buf_dma, GFP_KERNEL);
5928
5929 if (!vhost->login_buf) {
5930 dev_err(dev, "Couldn't allocate NPIV login buffer\n");
5931 goto free_sg_pool;
5932 }
5933
5934 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets;
5935 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz,
5936 &vhost->disc_buf_dma, GFP_KERNEL);
5937
5938 if (!vhost->disc_buf) {
5939 dev_err(dev, "Couldn't allocate Discover Targets buffer\n");
5940 goto free_login_buffer;
5941 }
5942
5943 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES,
5944 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL);
5945 atomic_set(&vhost->trace_index, -1);
5946
5947 if (!vhost->trace)
5948 goto free_disc_buffer;
5949
5950 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
5951 sizeof(struct ibmvfc_target));
5952
5953 if (!vhost->tgt_pool) {
5954 dev_err(dev, "Couldn't allocate target memory pool\n");
5955 goto free_trace;
5956 }
5957
5958 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf),
5959 &vhost->channel_setup_dma,
5960 GFP_KERNEL);
5961
5962 if (!vhost->channel_setup_buf) {
5963 dev_err(dev, "Couldn't allocate Channel Setup buffer\n");
5964 goto free_tgt_pool;
5965 }
5966
5967 LEAVE;
5968 return 0;
5969
5970free_tgt_pool:
5971 mempool_destroy(vhost->tgt_pool);
5972free_trace:
5973 kfree(vhost->trace);
5974free_disc_buffer:
5975 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf,
5976 vhost->disc_buf_dma);
5977free_login_buffer:
5978 dma_free_coherent(dev, sizeof(*vhost->login_buf),
5979 vhost->login_buf, vhost->login_buf_dma);
5980free_sg_pool:
5981 dma_pool_destroy(vhost->sg_pool);
5982unmap_async_crq:
5983 ibmvfc_free_queue(vhost, async_q);
5984nomem:
5985 LEAVE;
5986 return -ENOMEM;
5987}
5988
5989
5990
5991
5992
5993
5994static void ibmvfc_rport_add_thread(struct work_struct *work)
5995{
5996 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
5997 rport_add_work_q);
5998 struct ibmvfc_target *tgt;
5999 struct fc_rport *rport;
6000 unsigned long flags;
6001 int did_work;
6002
6003 ENTER;
6004 spin_lock_irqsave(vhost->host->host_lock, flags);
6005 do {
6006 did_work = 0;
6007 if (vhost->state != IBMVFC_ACTIVE)
6008 break;
6009
6010 list_for_each_entry(tgt, &vhost->targets, queue) {
6011 if (tgt->add_rport) {
6012 did_work = 1;
6013 tgt->add_rport = 0;
6014 kref_get(&tgt->kref);
6015 rport = tgt->rport;
6016 if (!rport) {
6017 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6018 ibmvfc_tgt_add_rport(tgt);
6019 } else if (get_device(&rport->dev)) {
6020 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6021 tgt_dbg(tgt, "Setting rport roles\n");
6022 fc_remote_port_rolechg(rport, tgt->ids.roles);
6023 put_device(&rport->dev);
6024 } else {
6025 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6026 }
6027
6028 kref_put(&tgt->kref, ibmvfc_release_tgt);
6029 spin_lock_irqsave(vhost->host->host_lock, flags);
6030 break;
6031 }
6032 }
6033 } while(did_work);
6034
6035 if (vhost->state == IBMVFC_ACTIVE)
6036 vhost->scan_complete = 1;
6037 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6038 LEAVE;
6039}
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
6050{
6051 struct ibmvfc_host *vhost;
6052 struct Scsi_Host *shost;
6053 struct device *dev = &vdev->dev;
6054 int rc = -ENOMEM;
6055 unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES;
6056
6057 ENTER;
6058 shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
6059 if (!shost) {
6060 dev_err(dev, "Couldn't allocate host data\n");
6061 goto out;
6062 }
6063
6064 shost->transportt = ibmvfc_transport_template;
6065 shost->can_queue = max_requests;
6066 shost->max_lun = max_lun;
6067 shost->max_id = max_targets;
6068 shost->max_sectors = IBMVFC_MAX_SECTORS;
6069 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN;
6070 shost->unique_id = shost->host_no;
6071 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1;
6072
6073 vhost = shost_priv(shost);
6074 INIT_LIST_HEAD(&vhost->targets);
6075 INIT_LIST_HEAD(&vhost->purge);
6076 sprintf(vhost->name, IBMVFC_NAME);
6077 vhost->host = shost;
6078 vhost->dev = dev;
6079 vhost->partition_number = -1;
6080 vhost->log_level = log_level;
6081 vhost->task_set = 1;
6082
6083 vhost->mq_enabled = mq_enabled;
6084 vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels);
6085 vhost->using_channels = 0;
6086 vhost->do_enquiry = 1;
6087
6088 strcpy(vhost->partition_name, "UNKNOWN");
6089 init_waitqueue_head(&vhost->work_wait_q);
6090 init_waitqueue_head(&vhost->init_wait_q);
6091 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
6092 mutex_init(&vhost->passthru_mutex);
6093
6094 if ((rc = ibmvfc_alloc_mem(vhost)))
6095 goto free_scsi_host;
6096
6097 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME,
6098 shost->host_no);
6099
6100 if (IS_ERR(vhost->work_thread)) {
6101 dev_err(dev, "Couldn't create kernel thread: %ld\n",
6102 PTR_ERR(vhost->work_thread));
6103 rc = PTR_ERR(vhost->work_thread);
6104 goto free_host_mem;
6105 }
6106
6107 if ((rc = ibmvfc_init_crq(vhost))) {
6108 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
6109 goto kill_kthread;
6110 }
6111
6112 if ((rc = scsi_add_host(shost, dev)))
6113 goto release_crq;
6114
6115 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
6116
6117 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
6118 &ibmvfc_trace_attr))) {
6119 dev_err(dev, "Failed to create trace file. rc=%d\n", rc);
6120 goto remove_shost;
6121 }
6122
6123 ibmvfc_init_sub_crqs(vhost);
6124
6125 if (shost_to_fc_host(shost)->rqst_q)
6126 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
6127 dev_set_drvdata(dev, vhost);
6128 spin_lock(&ibmvfc_driver_lock);
6129 list_add_tail(&vhost->queue, &ibmvfc_head);
6130 spin_unlock(&ibmvfc_driver_lock);
6131
6132 ibmvfc_send_crq_init(vhost);
6133 scsi_scan_host(shost);
6134 return 0;
6135
6136remove_shost:
6137 scsi_remove_host(shost);
6138release_crq:
6139 ibmvfc_release_crq_queue(vhost);
6140kill_kthread:
6141 kthread_stop(vhost->work_thread);
6142free_host_mem:
6143 ibmvfc_free_mem(vhost);
6144free_scsi_host:
6145 scsi_host_put(shost);
6146out:
6147 LEAVE;
6148 return rc;
6149}
6150
6151
6152
6153
6154
6155
6156
6157
6158static void ibmvfc_remove(struct vio_dev *vdev)
6159{
6160 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev);
6161 LIST_HEAD(purge);
6162 unsigned long flags;
6163
6164 ENTER;
6165 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
6166
6167 spin_lock_irqsave(vhost->host->host_lock, flags);
6168 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
6169 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6170
6171 ibmvfc_wait_while_resetting(vhost);
6172 kthread_stop(vhost->work_thread);
6173 fc_remove_host(vhost->host);
6174 scsi_remove_host(vhost->host);
6175
6176 spin_lock_irqsave(vhost->host->host_lock, flags);
6177 ibmvfc_purge_requests(vhost, DID_ERROR);
6178 list_splice_init(&vhost->purge, &purge);
6179 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6180 ibmvfc_complete_purge(&purge);
6181 ibmvfc_release_sub_crqs(vhost);
6182 ibmvfc_release_crq_queue(vhost);
6183
6184 ibmvfc_free_mem(vhost);
6185 spin_lock(&ibmvfc_driver_lock);
6186 list_del(&vhost->queue);
6187 spin_unlock(&ibmvfc_driver_lock);
6188 scsi_host_put(vhost->host);
6189 LEAVE;
6190}
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200static int ibmvfc_resume(struct device *dev)
6201{
6202 unsigned long flags;
6203 struct ibmvfc_host *vhost = dev_get_drvdata(dev);
6204 struct vio_dev *vdev = to_vio_dev(dev);
6205
6206 spin_lock_irqsave(vhost->host->host_lock, flags);
6207 vio_disable_interrupts(vdev);
6208 tasklet_schedule(&vhost->tasklet);
6209 spin_unlock_irqrestore(vhost->host->host_lock, flags);
6210 return 0;
6211}
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev)
6222{
6223 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu);
6224 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun);
6225}
6226
6227static const struct vio_device_id ibmvfc_device_table[] = {
6228 {"fcp", "IBM,vfc-client"},
6229 { "", "" }
6230};
6231MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
6232
6233static const struct dev_pm_ops ibmvfc_pm_ops = {
6234 .resume = ibmvfc_resume
6235};
6236
6237static struct vio_driver ibmvfc_driver = {
6238 .id_table = ibmvfc_device_table,
6239 .probe = ibmvfc_probe,
6240 .remove = ibmvfc_remove,
6241 .get_desired_dma = ibmvfc_get_desired_dma,
6242 .name = IBMVFC_NAME,
6243 .pm = &ibmvfc_pm_ops,
6244};
6245
6246static struct fc_function_template ibmvfc_transport_functions = {
6247 .show_host_fabric_name = 1,
6248 .show_host_node_name = 1,
6249 .show_host_port_name = 1,
6250 .show_host_supported_classes = 1,
6251 .show_host_port_type = 1,
6252 .show_host_port_id = 1,
6253 .show_host_maxframe_size = 1,
6254
6255 .get_host_port_state = ibmvfc_get_host_port_state,
6256 .show_host_port_state = 1,
6257
6258 .get_host_speed = ibmvfc_get_host_speed,
6259 .show_host_speed = 1,
6260
6261 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip,
6262 .terminate_rport_io = ibmvfc_terminate_rport_io,
6263
6264 .show_rport_maxframe_size = 1,
6265 .show_rport_supported_classes = 1,
6266
6267 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo,
6268 .show_rport_dev_loss_tmo = 1,
6269
6270 .get_starget_node_name = ibmvfc_get_starget_node_name,
6271 .show_starget_node_name = 1,
6272
6273 .get_starget_port_name = ibmvfc_get_starget_port_name,
6274 .show_starget_port_name = 1,
6275
6276 .get_starget_port_id = ibmvfc_get_starget_port_id,
6277 .show_starget_port_id = 1,
6278
6279 .bsg_request = ibmvfc_bsg_request,
6280 .bsg_timeout = ibmvfc_bsg_timeout,
6281};
6282
6283
6284
6285
6286
6287
6288
6289static int __init ibmvfc_module_init(void)
6290{
6291 int rc;
6292
6293 if (!firmware_has_feature(FW_FEATURE_VIO))
6294 return -ENODEV;
6295
6296 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n",
6297 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE);
6298
6299 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions);
6300 if (!ibmvfc_transport_template)
6301 return -ENOMEM;
6302
6303 rc = vio_register_driver(&ibmvfc_driver);
6304 if (rc)
6305 fc_release_transport(ibmvfc_transport_template);
6306 return rc;
6307}
6308
6309
6310
6311
6312
6313
6314
6315static void __exit ibmvfc_module_exit(void)
6316{
6317 vio_unregister_driver(&ibmvfc_driver);
6318 fc_release_transport(ibmvfc_transport_template);
6319}
6320
6321module_init(ibmvfc_module_init);
6322module_exit(ibmvfc_module_exit);
6323