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6
7#include "efct_driver.h"
8#include "efct_hw.h"
9
10#define enable_tsend_auto_resp(efct) 1
11#define enable_treceive_auto_resp(efct) 0
12
13#define SCSI_IOFMT "[%04x][i:%04x t:%04x h:%04x]"
14
15#define scsi_io_printf(io, fmt, ...) \
16 efc_log_debug(io->efct, "[%s]" SCSI_IOFMT fmt, \
17 io->node->display_name, io->instance_index,\
18 io->init_task_tag, io->tgt_task_tag, io->hw_tag, ##__VA_ARGS__)
19
20#define EFCT_LOG_ENABLE_SCSI_TRACE(efct) \
21 (((efct) != NULL) ? (((efct)->logmask & (1U << 2)) != 0) : 0)
22
23#define scsi_io_trace(io, fmt, ...) \
24 do { \
25 if (EFCT_LOG_ENABLE_SCSI_TRACE(io->efct)) \
26 scsi_io_printf(io, fmt, ##__VA_ARGS__); \
27 } while (0)
28
29struct efct_io *
30efct_scsi_io_alloc(struct efct_node *node)
31{
32 struct efct *efct;
33 struct efct_xport *xport;
34 struct efct_io *io;
35 unsigned long flags;
36
37 efct = node->efct;
38
39 xport = efct->xport;
40
41 io = efct_io_pool_io_alloc(efct->xport->io_pool);
42 if (!io) {
43 efc_log_err(efct, "IO alloc Failed\n");
44 atomic_add_return(1, &xport->io_alloc_failed_count);
45 return NULL;
46 }
47
48
49 kref_init(&io->ref);
50 io->release = _efct_scsi_io_free;
51
52
53 io->efct = efct;
54 io->node = node;
55 kref_get(&node->ref);
56
57
58 io->io_type = EFCT_IO_TYPE_IO;
59 io->display_name = "scsi_io";
60
61 io->cmd_ini = false;
62 io->cmd_tgt = true;
63
64
65 INIT_LIST_HEAD(&io->list_entry);
66 spin_lock_irqsave(&node->active_ios_lock, flags);
67 list_add(&io->list_entry, &node->active_ios);
68
69 spin_unlock_irqrestore(&node->active_ios_lock, flags);
70
71 return io;
72}
73
74void
75_efct_scsi_io_free(struct kref *arg)
76{
77 struct efct_io *io = container_of(arg, struct efct_io, ref);
78 struct efct *efct = io->efct;
79 struct efct_node *node = io->node;
80 unsigned long flags = 0;
81
82 scsi_io_trace(io, "freeing io 0x%p %s\n", io, io->display_name);
83
84 if (io->io_free) {
85 efc_log_err(efct, "IO already freed.\n");
86 return;
87 }
88
89 spin_lock_irqsave(&node->active_ios_lock, flags);
90 list_del_init(&io->list_entry);
91 spin_unlock_irqrestore(&node->active_ios_lock, flags);
92
93 kref_put(&node->ref, node->release);
94 io->node = NULL;
95 efct_io_pool_io_free(efct->xport->io_pool, io);
96}
97
98void
99efct_scsi_io_free(struct efct_io *io)
100{
101 scsi_io_trace(io, "freeing io 0x%p %s\n", io, io->display_name);
102 WARN_ON(!refcount_read(&io->ref.refcount));
103 kref_put(&io->ref, io->release);
104}
105
106static void
107efct_target_io_cb(struct efct_hw_io *hio, u32 length, int status,
108 u32 ext_status, void *app)
109{
110 u32 flags = 0;
111 struct efct_io *io = app;
112 struct efct *efct;
113 enum efct_scsi_io_status scsi_stat = EFCT_SCSI_STATUS_GOOD;
114 efct_scsi_io_cb_t cb;
115
116 if (!io || !io->efct) {
117 pr_err("%s: IO can not be NULL\n", __func__);
118 return;
119 }
120
121 scsi_io_trace(io, "status x%x ext_status x%x\n", status, ext_status);
122
123 efct = io->efct;
124
125 io->transferred += length;
126
127 if (!io->scsi_tgt_cb) {
128 efct_scsi_check_pending(efct);
129 return;
130 }
131
132
133 cb = io->scsi_tgt_cb;
134
135
136 io->scsi_tgt_cb = NULL;
137
138
139
140
141
142 if (status == 0 && io->auto_resp)
143 flags |= EFCT_SCSI_IO_CMPL_RSP_SENT;
144 else
145 flags |= EFCT_SCSI_IO_CMPL;
146
147 switch (status) {
148 case SLI4_FC_WCQE_STATUS_SUCCESS:
149 scsi_stat = EFCT_SCSI_STATUS_GOOD;
150 break;
151 case SLI4_FC_WCQE_STATUS_DI_ERROR:
152 if (ext_status & SLI4_FC_DI_ERROR_GE)
153 scsi_stat = EFCT_SCSI_STATUS_DIF_GUARD_ERR;
154 else if (ext_status & SLI4_FC_DI_ERROR_AE)
155 scsi_stat = EFCT_SCSI_STATUS_DIF_APP_TAG_ERROR;
156 else if (ext_status & SLI4_FC_DI_ERROR_RE)
157 scsi_stat = EFCT_SCSI_STATUS_DIF_REF_TAG_ERROR;
158 else
159 scsi_stat = EFCT_SCSI_STATUS_DIF_UNKNOWN_ERROR;
160 break;
161 case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
162 switch (ext_status) {
163 case SLI4_FC_LOCAL_REJECT_INVALID_RELOFFSET:
164 case SLI4_FC_LOCAL_REJECT_ABORT_REQUESTED:
165 scsi_stat = EFCT_SCSI_STATUS_ABORTED;
166 break;
167 case SLI4_FC_LOCAL_REJECT_INVALID_RPI:
168 scsi_stat = EFCT_SCSI_STATUS_NEXUS_LOST;
169 break;
170 case SLI4_FC_LOCAL_REJECT_NO_XRI:
171 scsi_stat = EFCT_SCSI_STATUS_NO_IO;
172 break;
173 default:
174
175 scsi_stat = EFCT_SCSI_STATUS_ERROR;
176 break;
177 }
178 break;
179
180 case SLI4_FC_WCQE_STATUS_TARGET_WQE_TIMEOUT:
181
182 scsi_stat = EFCT_SCSI_STATUS_TIMEDOUT_AND_ABORTED;
183 break;
184
185 case SLI4_FC_WCQE_STATUS_SHUTDOWN:
186
187 scsi_stat = EFCT_SCSI_STATUS_SHUTDOWN;
188 break;
189
190 default:
191 scsi_stat = EFCT_SCSI_STATUS_ERROR;
192 break;
193 }
194
195 cb(io, scsi_stat, flags, io->scsi_tgt_cb_arg);
196
197 efct_scsi_check_pending(efct);
198}
199
200static int
201efct_scsi_build_sgls(struct efct_hw *hw, struct efct_hw_io *hio,
202 struct efct_scsi_sgl *sgl, u32 sgl_count,
203 enum efct_hw_io_type type)
204{
205 int rc;
206 u32 i;
207 struct efct *efct = hw->os;
208
209
210 rc = efct_hw_io_init_sges(hw, hio, type);
211 if (rc) {
212 efc_log_err(efct, "efct_hw_io_init_sges failed: %d\n", rc);
213 return -EIO;
214 }
215
216 for (i = 0; i < sgl_count; i++) {
217
218 rc = efct_hw_io_add_sge(hw, hio, sgl[i].addr, sgl[i].len);
219 if (rc) {
220 efc_log_err(efct, "add sge failed cnt=%d rc=%d\n",
221 sgl_count, rc);
222 return rc;
223 }
224 }
225
226 return 0;
227}
228
229static void efc_log_sgl(struct efct_io *io)
230{
231 struct efct_hw_io *hio = io->hio;
232 struct sli4_sge *data = NULL;
233 u32 *dword = NULL;
234 u32 i;
235 u32 n_sge;
236
237 scsi_io_trace(io, "def_sgl at 0x%x 0x%08x\n",
238 upper_32_bits(hio->def_sgl.phys),
239 lower_32_bits(hio->def_sgl.phys));
240 n_sge = (hio->sgl == &hio->def_sgl) ? hio->n_sge : hio->def_sgl_count;
241 for (i = 0, data = hio->def_sgl.virt; i < n_sge; i++, data++) {
242 dword = (u32 *)data;
243
244 scsi_io_trace(io, "SGL %2d 0x%08x 0x%08x 0x%08x 0x%08x\n",
245 i, dword[0], dword[1], dword[2], dword[3]);
246
247 if (dword[2] & (1U << 31))
248 break;
249 }
250}
251
252static void
253efct_scsi_check_pending_async_cb(struct efct_hw *hw, int status,
254 u8 *mqe, void *arg)
255{
256 struct efct_io *io = arg;
257
258 if (io) {
259 efct_hw_done_t cb = io->hw_cb;
260
261 if (!io->hw_cb)
262 return;
263
264 io->hw_cb = NULL;
265 (cb)(io->hio, 0, SLI4_FC_WCQE_STATUS_DISPATCH_ERROR, 0, io);
266 }
267}
268
269static int
270efct_scsi_io_dispatch_hw_io(struct efct_io *io, struct efct_hw_io *hio)
271{
272 int rc = 0;
273 struct efct *efct = io->efct;
274
275
276
277
278 io->hio = hio;
279 if (io->cmd_tgt)
280 io->tgt_task_tag = hio->indicator;
281 else if (io->cmd_ini)
282 io->init_task_tag = hio->indicator;
283 io->hw_tag = hio->reqtag;
284
285 hio->eq = io->hw_priv;
286
287
288 switch (io->wq_steering) {
289 case EFCT_SCSI_WQ_STEERING_CLASS >> EFCT_SCSI_WQ_STEERING_SHIFT:
290 hio->wq_steering = EFCT_HW_WQ_STEERING_CLASS;
291 break;
292 case EFCT_SCSI_WQ_STEERING_REQUEST >> EFCT_SCSI_WQ_STEERING_SHIFT:
293 hio->wq_steering = EFCT_HW_WQ_STEERING_REQUEST;
294 break;
295 case EFCT_SCSI_WQ_STEERING_CPU >> EFCT_SCSI_WQ_STEERING_SHIFT:
296 hio->wq_steering = EFCT_HW_WQ_STEERING_CPU;
297 break;
298 }
299
300 switch (io->io_type) {
301 case EFCT_IO_TYPE_IO:
302 rc = efct_scsi_build_sgls(&efct->hw, io->hio,
303 io->sgl, io->sgl_count, io->hio_type);
304 if (rc)
305 break;
306
307 if (EFCT_LOG_ENABLE_SCSI_TRACE(efct))
308 efc_log_sgl(io);
309
310 if (io->app_id)
311 io->iparam.fcp_tgt.app_id = io->app_id;
312
313 io->iparam.fcp_tgt.vpi = io->node->vpi;
314 io->iparam.fcp_tgt.rpi = io->node->rpi;
315 io->iparam.fcp_tgt.s_id = io->node->port_fc_id;
316 io->iparam.fcp_tgt.d_id = io->node->node_fc_id;
317 io->iparam.fcp_tgt.xmit_len = io->wire_len;
318
319 rc = efct_hw_io_send(&io->efct->hw, io->hio_type, io->hio,
320 &io->iparam, io->hw_cb, io);
321 break;
322 default:
323 scsi_io_printf(io, "Unknown IO type=%d\n", io->io_type);
324 rc = -EIO;
325 break;
326 }
327 return rc;
328}
329
330static int
331efct_scsi_io_dispatch_no_hw_io(struct efct_io *io)
332{
333 int rc;
334
335 switch (io->io_type) {
336 case EFCT_IO_TYPE_ABORT: {
337 struct efct_hw_io *hio_to_abort = NULL;
338
339 hio_to_abort = io->io_to_abort->hio;
340
341 if (!hio_to_abort) {
342
343
344
345
346
347
348
349
350
351
352
353
354 scsi_io_printf(io, "IO: not active\n");
355 ((efct_hw_done_t)io->hw_cb)(io->hio, 0,
356 SLI4_FC_WCQE_STATUS_SUCCESS, 0, io);
357 rc = 0;
358 break;
359 }
360
361
362 scsi_io_printf(io, "aborting\n");
363 rc = efct_hw_io_abort(&io->efct->hw, hio_to_abort,
364 io->send_abts, io->hw_cb, io);
365 if (rc) {
366 int status = SLI4_FC_WCQE_STATUS_SUCCESS;
367 efct_hw_done_t cb = io->hw_cb;
368
369 if (rc != -ENOENT && rc != -EINPROGRESS) {
370 status = -1;
371 scsi_io_printf(io, "Failed to abort IO rc=%d\n",
372 rc);
373 }
374 cb(io->hio, 0, status, 0, io);
375 rc = 0;
376 }
377
378 break;
379 }
380 default:
381 scsi_io_printf(io, "Unknown IO type=%d\n", io->io_type);
382 rc = -EIO;
383 break;
384 }
385 return rc;
386}
387
388static struct efct_io *
389efct_scsi_dispatch_pending(struct efct *efct)
390{
391 struct efct_xport *xport = efct->xport;
392 struct efct_io *io = NULL;
393 struct efct_hw_io *hio;
394 unsigned long flags = 0;
395 int status;
396
397 spin_lock_irqsave(&xport->io_pending_lock, flags);
398
399 if (!list_empty(&xport->io_pending_list)) {
400 io = list_first_entry(&xport->io_pending_list, struct efct_io,
401 io_pending_link);
402 list_del_init(&io->io_pending_link);
403 }
404
405 if (!io) {
406 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
407 return NULL;
408 }
409
410 if (io->io_type == EFCT_IO_TYPE_ABORT) {
411 hio = NULL;
412 } else {
413 hio = efct_hw_io_alloc(&efct->hw);
414 if (!hio) {
415
416
417
418
419 list_add(&xport->io_pending_list, &io->io_pending_link);
420 io = NULL;
421 } else {
422 hio->eq = io->hw_priv;
423 }
424 }
425
426
427 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
428
429 if (!io)
430 return NULL;
431
432
433
434
435
436 atomic_sub_return(1, &xport->io_pending_count);
437 if (!hio)
438 status = efct_scsi_io_dispatch_no_hw_io(io);
439 else
440 status = efct_scsi_io_dispatch_hw_io(io, hio);
441 if (status) {
442
443
444
445
446
447
448 if (efct_hw_async_call(&efct->hw,
449 efct_scsi_check_pending_async_cb, io)) {
450 efc_log_debug(efct, "call hw async failed\n");
451 }
452 }
453
454 return io;
455}
456
457void
458efct_scsi_check_pending(struct efct *efct)
459{
460 struct efct_xport *xport = efct->xport;
461 struct efct_io *io = NULL;
462 int count = 0;
463 unsigned long flags = 0;
464 int dispatch = 0;
465
466
467 if (atomic_add_return(1, &xport->io_pending_recursing)) {
468
469 atomic_sub_return(1, &xport->io_pending_recursing);
470 return;
471 }
472
473 while (efct_scsi_dispatch_pending(efct))
474 count++;
475
476 if (count) {
477 atomic_sub_return(1, &xport->io_pending_recursing);
478 return;
479 }
480
481
482
483
484
485
486
487
488 spin_lock_irqsave(&xport->io_pending_lock, flags);
489
490 list_for_each_entry(io, &xport->io_pending_list, io_pending_link) {
491 if (io->io_type == EFCT_IO_TYPE_ABORT && io->io_to_abort->hio) {
492
493
494
495 dispatch = 1;
496 list_del_init(&io->io_pending_link);
497 atomic_sub_return(1, &xport->io_pending_count);
498 break;
499 }
500 }
501
502 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
503
504 if (dispatch) {
505 if (efct_scsi_io_dispatch_no_hw_io(io)) {
506 if (efct_hw_async_call(&efct->hw,
507 efct_scsi_check_pending_async_cb, io)) {
508 efc_log_debug(efct, "hw async failed\n");
509 }
510 }
511 }
512
513 atomic_sub_return(1, &xport->io_pending_recursing);
514}
515
516int
517efct_scsi_io_dispatch(struct efct_io *io, void *cb)
518{
519 struct efct_hw_io *hio;
520 struct efct *efct = io->efct;
521 struct efct_xport *xport = efct->xport;
522 unsigned long flags = 0;
523
524 io->hw_cb = cb;
525
526
527
528
529
530 if (io->hio)
531 return efct_scsi_io_dispatch_hw_io(io, io->hio);
532
533
534
535
536
537
538 spin_lock_irqsave(&xport->io_pending_lock, flags);
539 if (!list_empty(&xport->io_pending_list)) {
540
541
542
543
544
545 if (io->low_latency) {
546 INIT_LIST_HEAD(&io->io_pending_link);
547 list_add(&xport->io_pending_list, &io->io_pending_link);
548 } else {
549 INIT_LIST_HEAD(&io->io_pending_link);
550 list_add_tail(&io->io_pending_link,
551 &xport->io_pending_list);
552 }
553 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
554 atomic_add_return(1, &xport->io_pending_count);
555 atomic_add_return(1, &xport->io_total_pending);
556
557
558 efct_scsi_check_pending(efct);
559 return 0;
560 }
561 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
562
563
564
565
566
567 hio = efct_hw_io_alloc(&io->efct->hw);
568 if (!hio) {
569
570 spin_lock_irqsave(&xport->io_pending_lock, flags);
571 INIT_LIST_HEAD(&io->io_pending_link);
572 list_add_tail(&io->io_pending_link, &xport->io_pending_list);
573 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
574
575 atomic_add_return(1, &xport->io_total_pending);
576 atomic_add_return(1, &xport->io_pending_count);
577 return 0;
578 }
579
580
581 return efct_scsi_io_dispatch_hw_io(io, hio);
582}
583
584int
585efct_scsi_io_dispatch_abort(struct efct_io *io, void *cb)
586{
587 struct efct *efct = io->efct;
588 struct efct_xport *xport = efct->xport;
589 unsigned long flags = 0;
590
591 io->hw_cb = cb;
592
593
594
595
596
597
598
599 spin_lock_irqsave(&xport->io_pending_lock, flags);
600 if (!list_empty(&xport->io_pending_list)) {
601 INIT_LIST_HEAD(&io->io_pending_link);
602 list_add_tail(&io->io_pending_link, &xport->io_pending_list);
603 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
604 atomic_add_return(1, &xport->io_pending_count);
605 atomic_add_return(1, &xport->io_total_pending);
606
607
608 efct_scsi_check_pending(efct);
609 return 0;
610 }
611 spin_unlock_irqrestore(&xport->io_pending_lock, flags);
612
613
614 return efct_scsi_io_dispatch_no_hw_io(io);
615}
616
617static inline int
618efct_scsi_xfer_data(struct efct_io *io, u32 flags,
619 struct efct_scsi_sgl *sgl, u32 sgl_count, u64 xwire_len,
620 enum efct_hw_io_type type, int enable_ar,
621 efct_scsi_io_cb_t cb, void *arg)
622{
623 struct efct *efct;
624 size_t residual = 0;
625
626 io->sgl_count = sgl_count;
627
628 efct = io->efct;
629
630 scsi_io_trace(io, "%s wire_len %llu\n",
631 (type == EFCT_HW_IO_TARGET_READ) ? "send" : "recv",
632 xwire_len);
633
634 io->hio_type = type;
635
636 io->scsi_tgt_cb = cb;
637 io->scsi_tgt_cb_arg = arg;
638
639 residual = io->exp_xfer_len - io->transferred;
640 io->wire_len = (xwire_len < residual) ? xwire_len : residual;
641 residual = (xwire_len - io->wire_len);
642
643 memset(&io->iparam, 0, sizeof(io->iparam));
644 io->iparam.fcp_tgt.ox_id = io->init_task_tag;
645 io->iparam.fcp_tgt.offset = io->transferred;
646 io->iparam.fcp_tgt.cs_ctl = io->cs_ctl;
647 io->iparam.fcp_tgt.timeout = io->timeout;
648
649
650
651
652 if (enable_ar && (flags & EFCT_SCSI_LAST_DATAPHASE) && residual == 0 &&
653 ((io->transferred + io->wire_len) == io->exp_xfer_len) &&
654 (!(flags & EFCT_SCSI_NO_AUTO_RESPONSE))) {
655 io->iparam.fcp_tgt.flags |= SLI4_IO_AUTO_GOOD_RESPONSE;
656 io->auto_resp = true;
657 } else {
658 io->auto_resp = false;
659 }
660
661
662 io->xfer_req = io->wire_len;
663
664
665
666
667 io->transferred += residual;
668
669
670
671 if (residual) {
672 struct efct_scsi_sgl *sgl_ptr = &io->sgl[sgl_count - 1];
673
674 while (residual) {
675 size_t len = sgl_ptr->len;
676
677 if (len > residual) {
678 sgl_ptr->len = len - residual;
679 residual = 0;
680 } else {
681 sgl_ptr->len = 0;
682 residual -= len;
683 io->sgl_count--;
684 }
685 sgl_ptr--;
686 }
687 }
688
689
690 io->low_latency = (flags & EFCT_SCSI_LOW_LATENCY) != 0;
691 io->wq_steering = (flags & EFCT_SCSI_WQ_STEERING_MASK) >>
692 EFCT_SCSI_WQ_STEERING_SHIFT;
693 io->wq_class = (flags & EFCT_SCSI_WQ_CLASS_MASK) >>
694 EFCT_SCSI_WQ_CLASS_SHIFT;
695
696 if (efct->xport) {
697 struct efct_xport *xport = efct->xport;
698
699 if (type == EFCT_HW_IO_TARGET_READ) {
700 xport->fcp_stats.input_requests++;
701 xport->fcp_stats.input_bytes += xwire_len;
702 } else if (type == EFCT_HW_IO_TARGET_WRITE) {
703 xport->fcp_stats.output_requests++;
704 xport->fcp_stats.output_bytes += xwire_len;
705 }
706 }
707 return efct_scsi_io_dispatch(io, efct_target_io_cb);
708}
709
710int
711efct_scsi_send_rd_data(struct efct_io *io, u32 flags,
712 struct efct_scsi_sgl *sgl, u32 sgl_count, u64 len,
713 efct_scsi_io_cb_t cb, void *arg)
714{
715 return efct_scsi_xfer_data(io, flags, sgl, sgl_count,
716 len, EFCT_HW_IO_TARGET_READ,
717 enable_tsend_auto_resp(io->efct), cb, arg);
718}
719
720int
721efct_scsi_recv_wr_data(struct efct_io *io, u32 flags,
722 struct efct_scsi_sgl *sgl, u32 sgl_count, u64 len,
723 efct_scsi_io_cb_t cb, void *arg)
724{
725 return efct_scsi_xfer_data(io, flags, sgl, sgl_count, len,
726 EFCT_HW_IO_TARGET_WRITE,
727 enable_treceive_auto_resp(io->efct), cb, arg);
728}
729
730int
731efct_scsi_send_resp(struct efct_io *io, u32 flags,
732 struct efct_scsi_cmd_resp *rsp,
733 efct_scsi_io_cb_t cb, void *arg)
734{
735 struct efct *efct;
736 int residual;
737
738 bool auto_resp = true;
739 u8 scsi_status = 0;
740 u16 scsi_status_qualifier = 0;
741 u8 *sense_data = NULL;
742 u32 sense_data_length = 0;
743
744 efct = io->efct;
745
746 if (rsp) {
747 scsi_status = rsp->scsi_status;
748 scsi_status_qualifier = rsp->scsi_status_qualifier;
749 sense_data = rsp->sense_data;
750 sense_data_length = rsp->sense_data_length;
751 residual = rsp->residual;
752 } else {
753 residual = io->exp_xfer_len - io->transferred;
754 }
755
756 io->wire_len = 0;
757 io->hio_type = EFCT_HW_IO_TARGET_RSP;
758
759 io->scsi_tgt_cb = cb;
760 io->scsi_tgt_cb_arg = arg;
761
762 memset(&io->iparam, 0, sizeof(io->iparam));
763 io->iparam.fcp_tgt.ox_id = io->init_task_tag;
764 io->iparam.fcp_tgt.offset = 0;
765 io->iparam.fcp_tgt.cs_ctl = io->cs_ctl;
766 io->iparam.fcp_tgt.timeout = io->timeout;
767
768
769 io->low_latency = (flags & EFCT_SCSI_LOW_LATENCY) != 0;
770 io->wq_steering = (flags & EFCT_SCSI_WQ_STEERING_MASK) >>
771 EFCT_SCSI_WQ_STEERING_SHIFT;
772 io->wq_class = (flags & EFCT_SCSI_WQ_CLASS_MASK) >>
773 EFCT_SCSI_WQ_CLASS_SHIFT;
774
775 if (scsi_status != 0 || residual || sense_data_length) {
776 struct fcp_resp_with_ext *fcprsp = io->rspbuf.virt;
777 u8 *sns_data;
778
779 if (!fcprsp) {
780 efc_log_err(efct, "NULL response buffer\n");
781 return -EIO;
782 }
783
784 sns_data = (u8 *)io->rspbuf.virt + sizeof(*fcprsp);
785
786 auto_resp = false;
787
788 memset(fcprsp, 0, sizeof(*fcprsp));
789
790 io->wire_len += sizeof(*fcprsp);
791
792 fcprsp->resp.fr_status = scsi_status;
793 fcprsp->resp.fr_retry_delay =
794 cpu_to_be16(scsi_status_qualifier);
795
796
797 if (residual != 0) {
798
799
800
801
802
803 if (residual > 0) {
804 fcprsp->resp.fr_flags |= FCP_RESID_UNDER;
805 fcprsp->ext.fr_resid = cpu_to_be32(residual);
806 } else {
807 fcprsp->resp.fr_flags |= FCP_RESID_OVER;
808 fcprsp->ext.fr_resid = cpu_to_be32(-residual);
809 }
810 }
811
812 if (EFCT_SCSI_SNS_BUF_VALID(sense_data) && sense_data_length) {
813 if (sense_data_length > SCSI_SENSE_BUFFERSIZE) {
814 efc_log_err(efct, "Sense exceeds max size.\n");
815 return -EIO;
816 }
817
818 fcprsp->resp.fr_flags |= FCP_SNS_LEN_VAL;
819 memcpy(sns_data, sense_data, sense_data_length);
820 fcprsp->ext.fr_sns_len = cpu_to_be32(sense_data_length);
821 io->wire_len += sense_data_length;
822 }
823
824 io->sgl[0].addr = io->rspbuf.phys;
825 io->sgl[0].dif_addr = 0;
826 io->sgl[0].len = io->wire_len;
827 io->sgl_count = 1;
828 }
829
830 if (auto_resp)
831 io->iparam.fcp_tgt.flags |= SLI4_IO_AUTO_GOOD_RESPONSE;
832
833 return efct_scsi_io_dispatch(io, efct_target_io_cb);
834}
835
836static int
837efct_target_bls_resp_cb(struct efct_hw_io *hio, u32 length, int status,
838 u32 ext_status, void *app)
839{
840 struct efct_io *io = app;
841 struct efct *efct;
842 enum efct_scsi_io_status bls_status;
843
844 efct = io->efct;
845
846
847 if (status) {
848 io_error_log(io, "s=%#x x=%#x\n", status, ext_status);
849 bls_status = EFCT_SCSI_STATUS_ERROR;
850 } else {
851 bls_status = EFCT_SCSI_STATUS_GOOD;
852 }
853
854 if (io->bls_cb) {
855 efct_scsi_io_cb_t bls_cb = io->bls_cb;
856 void *bls_cb_arg = io->bls_cb_arg;
857
858 io->bls_cb = NULL;
859 io->bls_cb_arg = NULL;
860
861
862 bls_cb(io, bls_status, 0, bls_cb_arg);
863 }
864
865 efct_scsi_check_pending(efct);
866 return 0;
867}
868
869static int
870efct_target_send_bls_resp(struct efct_io *io,
871 efct_scsi_io_cb_t cb, void *arg)
872{
873 struct efct_node *node = io->node;
874 struct sli_bls_params *bls = &io->iparam.bls;
875 struct efct *efct = node->efct;
876 struct fc_ba_acc *acc;
877 int rc;
878
879
880 memset(&io->iparam, 0, sizeof(io->iparam));
881 bls->ox_id = io->init_task_tag;
882 bls->rx_id = io->abort_rx_id;
883 bls->vpi = io->node->vpi;
884 bls->rpi = io->node->rpi;
885 bls->s_id = U32_MAX;
886 bls->d_id = io->node->node_fc_id;
887 bls->rpi_registered = true;
888
889 acc = (void *)bls->payload;
890 acc->ba_ox_id = cpu_to_be16(bls->ox_id);
891 acc->ba_rx_id = cpu_to_be16(bls->rx_id);
892 acc->ba_high_seq_cnt = cpu_to_be16(U16_MAX);
893
894
895
896
897 io->io_type = EFCT_IO_TYPE_BLS_RESP;
898 io->display_name = "bls_rsp";
899 io->hio_type = EFCT_HW_BLS_ACC;
900 io->bls_cb = cb;
901 io->bls_cb_arg = arg;
902
903
904 rc = efct_hw_bls_send(efct, FC_RCTL_BA_ACC, bls,
905 efct_target_bls_resp_cb, io);
906 return rc;
907}
908
909static int efct_bls_send_rjt_cb(struct efct_hw_io *hio, u32 length, int status,
910 u32 ext_status, void *app)
911{
912 struct efct_io *io = app;
913
914 efct_scsi_io_free(io);
915 return 0;
916}
917
918struct efct_io *
919efct_bls_send_rjt(struct efct_io *io, struct fc_frame_header *hdr)
920{
921 struct efct_node *node = io->node;
922 struct sli_bls_params *bls = &io->iparam.bls;
923 struct efct *efct = node->efct;
924 struct fc_ba_rjt *acc;
925 int rc;
926
927
928 io->io_type = EFCT_IO_TYPE_BLS_RESP;
929 io->display_name = "ba_rjt";
930 io->hio_type = EFCT_HW_BLS_RJT;
931 io->init_task_tag = be16_to_cpu(hdr->fh_ox_id);
932
933
934 memset(&io->iparam, 0, sizeof(io->iparam));
935 bls->ox_id = be16_to_cpu(hdr->fh_ox_id);
936 bls->rx_id = be16_to_cpu(hdr->fh_rx_id);
937 bls->vpi = io->node->vpi;
938 bls->rpi = io->node->rpi;
939 bls->s_id = U32_MAX;
940 bls->d_id = io->node->node_fc_id;
941 bls->rpi_registered = true;
942
943 acc = (void *)bls->payload;
944 acc->br_reason = ELS_RJT_UNAB;
945 acc->br_explan = ELS_EXPL_NONE;
946
947 rc = efct_hw_bls_send(efct, FC_RCTL_BA_RJT, bls, efct_bls_send_rjt_cb,
948 io);
949 if (rc) {
950 efc_log_err(efct, "efct_scsi_io_dispatch() failed: %d\n", rc);
951 efct_scsi_io_free(io);
952 io = NULL;
953 }
954 return io;
955}
956
957int
958efct_scsi_send_tmf_resp(struct efct_io *io,
959 enum efct_scsi_tmf_resp rspcode,
960 u8 addl_rsp_info[3],
961 efct_scsi_io_cb_t cb, void *arg)
962{
963 int rc;
964 struct {
965 struct fcp_resp_with_ext rsp_ext;
966 struct fcp_resp_rsp_info info;
967 } *fcprsp;
968 u8 fcp_rspcode;
969
970 io->wire_len = 0;
971
972 switch (rspcode) {
973 case EFCT_SCSI_TMF_FUNCTION_COMPLETE:
974 fcp_rspcode = FCP_TMF_CMPL;
975 break;
976 case EFCT_SCSI_TMF_FUNCTION_SUCCEEDED:
977 case EFCT_SCSI_TMF_FUNCTION_IO_NOT_FOUND:
978 fcp_rspcode = FCP_TMF_CMPL;
979 break;
980 case EFCT_SCSI_TMF_FUNCTION_REJECTED:
981 fcp_rspcode = FCP_TMF_REJECTED;
982 break;
983 case EFCT_SCSI_TMF_INCORRECT_LOGICAL_UNIT_NUMBER:
984 fcp_rspcode = FCP_TMF_INVALID_LUN;
985 break;
986 case EFCT_SCSI_TMF_SERVICE_DELIVERY:
987 fcp_rspcode = FCP_TMF_FAILED;
988 break;
989 default:
990 fcp_rspcode = FCP_TMF_REJECTED;
991 break;
992 }
993
994 io->hio_type = EFCT_HW_IO_TARGET_RSP;
995
996 io->scsi_tgt_cb = cb;
997 io->scsi_tgt_cb_arg = arg;
998
999 if (io->tmf_cmd == EFCT_SCSI_TMF_ABORT_TASK) {
1000 rc = efct_target_send_bls_resp(io, cb, arg);
1001 return rc;
1002 }
1003
1004
1005 fcprsp = io->rspbuf.virt;
1006 memset(fcprsp, 0, sizeof(*fcprsp));
1007
1008 fcprsp->rsp_ext.resp.fr_flags |= FCP_SNS_LEN_VAL;
1009
1010 if (addl_rsp_info) {
1011 memcpy(fcprsp->info._fr_resvd, addl_rsp_info,
1012 sizeof(fcprsp->info._fr_resvd));
1013 }
1014 fcprsp->info.rsp_code = fcp_rspcode;
1015
1016 io->wire_len = sizeof(*fcprsp);
1017
1018 fcprsp->rsp_ext.ext.fr_rsp_len =
1019 cpu_to_be32(sizeof(struct fcp_resp_rsp_info));
1020
1021 io->sgl[0].addr = io->rspbuf.phys;
1022 io->sgl[0].dif_addr = 0;
1023 io->sgl[0].len = io->wire_len;
1024 io->sgl_count = 1;
1025
1026 memset(&io->iparam, 0, sizeof(io->iparam));
1027 io->iparam.fcp_tgt.ox_id = io->init_task_tag;
1028 io->iparam.fcp_tgt.offset = 0;
1029 io->iparam.fcp_tgt.cs_ctl = io->cs_ctl;
1030 io->iparam.fcp_tgt.timeout = io->timeout;
1031
1032 rc = efct_scsi_io_dispatch(io, efct_target_io_cb);
1033
1034 return rc;
1035}
1036
1037static int
1038efct_target_abort_cb(struct efct_hw_io *hio, u32 length, int status,
1039 u32 ext_status, void *app)
1040{
1041 struct efct_io *io = app;
1042 struct efct *efct;
1043 enum efct_scsi_io_status scsi_status;
1044 efct_scsi_io_cb_t abort_cb;
1045 void *abort_cb_arg;
1046
1047 efct = io->efct;
1048
1049 if (!io->abort_cb)
1050 goto done;
1051
1052 abort_cb = io->abort_cb;
1053 abort_cb_arg = io->abort_cb_arg;
1054
1055 io->abort_cb = NULL;
1056 io->abort_cb_arg = NULL;
1057
1058 switch (status) {
1059 case SLI4_FC_WCQE_STATUS_SUCCESS:
1060 scsi_status = EFCT_SCSI_STATUS_GOOD;
1061 break;
1062 case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
1063 switch (ext_status) {
1064 case SLI4_FC_LOCAL_REJECT_NO_XRI:
1065 scsi_status = EFCT_SCSI_STATUS_NO_IO;
1066 break;
1067 case SLI4_FC_LOCAL_REJECT_ABORT_IN_PROGRESS:
1068 scsi_status = EFCT_SCSI_STATUS_ABORT_IN_PROGRESS;
1069 break;
1070 default:
1071
1072 scsi_status = EFCT_SCSI_STATUS_ERROR;
1073 break;
1074 }
1075 break;
1076 case SLI4_FC_WCQE_STATUS_FCP_RSP_FAILURE:
1077 scsi_status = EFCT_SCSI_STATUS_CHECK_RESPONSE;
1078 break;
1079 default:
1080 scsi_status = EFCT_SCSI_STATUS_ERROR;
1081 break;
1082 }
1083
1084 abort_cb(io->io_to_abort, scsi_status, 0, abort_cb_arg);
1085
1086done:
1087
1088 kref_put(&io->io_to_abort->ref, io->io_to_abort->release);
1089
1090 efct_io_pool_io_free(efct->xport->io_pool, io);
1091
1092 efct_scsi_check_pending(efct);
1093 return 0;
1094}
1095
1096int
1097efct_scsi_tgt_abort_io(struct efct_io *io, efct_scsi_io_cb_t cb, void *arg)
1098{
1099 struct efct *efct;
1100 struct efct_xport *xport;
1101 int rc;
1102 struct efct_io *abort_io = NULL;
1103
1104 efct = io->efct;
1105 xport = efct->xport;
1106
1107
1108 if (kref_get_unless_zero(&io->ref) == 0) {
1109
1110 scsi_io_printf(io, "command no longer active\n");
1111 return -EIO;
1112 }
1113
1114
1115
1116
1117
1118
1119 abort_io = efct_io_pool_io_alloc(efct->xport->io_pool);
1120 if (!abort_io) {
1121 atomic_add_return(1, &xport->io_alloc_failed_count);
1122 kref_put(&io->ref, io->release);
1123 return -EIO;
1124 }
1125
1126
1127
1128 abort_io->cmd_tgt = true;
1129 abort_io->node = io->node;
1130
1131
1132 abort_io->io_type = EFCT_IO_TYPE_ABORT;
1133 abort_io->display_name = "tgt_abort";
1134 abort_io->io_to_abort = io;
1135 abort_io->send_abts = false;
1136 abort_io->abort_cb = cb;
1137 abort_io->abort_cb_arg = arg;
1138
1139
1140 rc = efct_scsi_io_dispatch_abort(abort_io, efct_target_abort_cb);
1141 if (rc)
1142 kref_put(&io->ref, io->release);
1143 return rc;
1144}
1145
1146void
1147efct_scsi_io_complete(struct efct_io *io)
1148{
1149 if (io->io_free) {
1150 efc_log_debug(io->efct, "completion for non-busy io tag 0x%x\n",
1151 io->tag);
1152 return;
1153 }
1154
1155 scsi_io_trace(io, "freeing io 0x%p %s\n", io, io->display_name);
1156 kref_put(&io->ref, io->release);
1157}
1158