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drm/modes: Fix drm_mode_vrefres() docs
[drm/drm-misc.git] / drivers / scsi / fnic / fnic_scsi.c
blob2ba61dba4569b827decb67fcca9354cc107c755c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 */
6 #include <linux/mempool.h>
7 #include <linux/errno.h>
8 #include <linux/init.h>
9 #include <linux/workqueue.h>
10 #include <linux/pci.h>
11 #include <linux/scatterlist.h>
12 #include <linux/skbuff.h>
13 #include <linux/spinlock.h>
14 #include <linux/etherdevice.h>
15 #include <linux/if_ether.h>
16 #include <linux/if_vlan.h>
17 #include <linux/delay.h>
18 #include <linux/gfp.h>
19 #include <scsi/scsi.h>
20 #include <scsi/scsi_host.h>
21 #include <scsi/scsi_device.h>
22 #include <scsi/scsi_cmnd.h>
23 #include <scsi/scsi_tcq.h>
24 #include <scsi/fc/fc_els.h>
25 #include <scsi/fc/fc_fcoe.h>
26 #include <scsi/libfc.h>
27 #include <scsi/fc_frame.h>
28 #include "fnic_io.h"
29 #include "fnic.h"
30
31 const char *fnic_state_str[] = {
32 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
33 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
34 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
35 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
36 };
37
38 static const char *fnic_ioreq_state_str[] = {
39 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
40 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
41 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
42 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
43 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
44 };
45
46 static const char *fcpio_status_str[] = {
47 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
48 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
49 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
50 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
51 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
52 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
53 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
54 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
55 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
56 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
57 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
58 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
59 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
60 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
61 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
62 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
63 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
64 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
65 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
66 };
67
68 const char *fnic_state_to_str(unsigned int state)
69 {
70 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
71 return "unknown";
72
73 return fnic_state_str[state];
74 }
75
76 static const char *fnic_ioreq_state_to_str(unsigned int state)
77 {
78 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
79 !fnic_ioreq_state_str[state])
80 return "unknown";
81
82 return fnic_ioreq_state_str[state];
83 }
84
85 static const char *fnic_fcpio_status_to_str(unsigned int status)
86 {
87 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
88 return "unknown";
89
90 return fcpio_status_str[status];
91 }
92
93 static void fnic_cleanup_io(struct fnic *fnic);
94
95 /*
96 * Unmap the data buffer and sense buffer for an io_req,
97 * also unmap and free the device-private scatter/gather list.
98 */
99 static void fnic_release_ioreq_buf(struct fnic *fnic,
100 struct fnic_io_req *io_req,
101 struct scsi_cmnd *sc)
102 {
103 if (io_req->sgl_list_pa)
104 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
105 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
106 DMA_TO_DEVICE);
107 scsi_dma_unmap(sc);
108
109 if (io_req->sgl_cnt)
110 mempool_free(io_req->sgl_list_alloc,
111 fnic->io_sgl_pool[io_req->sgl_type]);
112 if (io_req->sense_buf_pa)
113 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
114 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
115 }
116
117 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
118 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq, unsigned int hwq)
119 {
120 /* if no Ack received from firmware, then nothing to clean */
121 if (!fnic->fw_ack_recd[hwq])
122 return 1;
123
124 /*
125 * Update desc_available count based on number of freed descriptors
126 * Account for wraparound
127 */
128 if (wq->to_clean_index <= fnic->fw_ack_index[hwq])
129 wq->ring.desc_avail += (fnic->fw_ack_index[hwq]
130 - wq->to_clean_index + 1);
131 else
132 wq->ring.desc_avail += (wq->ring.desc_count
133 - wq->to_clean_index
134 + fnic->fw_ack_index[hwq] + 1);
135
136 /*
137 * just bump clean index to ack_index+1 accounting for wraparound
138 * this will essentially free up all descriptors between
139 * to_clean_index and fw_ack_index, both inclusive
140 */
141 wq->to_clean_index =
142 (fnic->fw_ack_index[hwq] + 1) % wq->ring.desc_count;
143
144 /* we have processed the acks received so far */
145 fnic->fw_ack_recd[hwq] = 0;
146 return 0;
147 }
148
149
150 /*
151 * __fnic_set_state_flags
152 * Sets/Clears bits in fnic's state_flags
153 **/
154 void
155 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
156 unsigned long clearbits)
157 {
158 unsigned long flags = 0;
159
160 spin_lock_irqsave(&fnic->fnic_lock, flags);
161
162 if (clearbits)
163 fnic->state_flags &= ~st_flags;
164 else
165 fnic->state_flags |= st_flags;
166
167 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
168
169 return;
170 }
171
172
173 /*
174 * fnic_fw_reset_handler
175 * Routine to send reset msg to fw
176 */
177 int fnic_fw_reset_handler(struct fnic *fnic)
178 {
179 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0];
180 int ret = 0;
181 unsigned long flags;
182
183 /* indicate fwreset to io path */
184 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
185
186 skb_queue_purge(&fnic->frame_queue);
187 skb_queue_purge(&fnic->tx_queue);
188
189 /* wait for io cmpl */
190 while (atomic_read(&fnic->in_flight))
191 schedule_timeout(msecs_to_jiffies(1));
192
193 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
194
195 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
196 free_wq_copy_descs(fnic, wq, 0);
197
198 if (!vnic_wq_copy_desc_avail(wq))
199 ret = -EAGAIN;
200 else {
201 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
202 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
203 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
204 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
205 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
206 atomic64_read(
207 &fnic->fnic_stats.fw_stats.active_fw_reqs));
208 }
209
210 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
211
212 if (!ret) {
213 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
214 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
215 "Issued fw reset\n");
216 } else {
217 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
218 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
219 "Failed to issue fw reset\n");
220 }
221
222 return ret;
223 }
224
225
226 /*
227 * fnic_flogi_reg_handler
228 * Routine to send flogi register msg to fw
229 */
230 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
231 {
232 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0];
233 enum fcpio_flogi_reg_format_type format;
234 struct fc_lport *lp = fnic->lport;
235 u8 gw_mac[ETH_ALEN];
236 int ret = 0;
237 unsigned long flags;
238
239 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
240
241 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
242 free_wq_copy_descs(fnic, wq, 0);
243
244 if (!vnic_wq_copy_desc_avail(wq)) {
245 ret = -EAGAIN;
246 goto flogi_reg_ioreq_end;
247 }
248
249 if (fnic->ctlr.map_dest) {
250 eth_broadcast_addr(gw_mac);
251 format = FCPIO_FLOGI_REG_DEF_DEST;
252 } else {
253 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
254 format = FCPIO_FLOGI_REG_GW_DEST;
255 }
256
257 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
258 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
259 fc_id, gw_mac,
260 fnic->data_src_addr,
261 lp->r_a_tov, lp->e_d_tov);
262 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
263 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
264 fc_id, fnic->data_src_addr, gw_mac);
265 } else {
266 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
267 format, fc_id, gw_mac);
268 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
269 "FLOGI reg issued fcid 0x%x map %d dest 0x%p\n",
270 fc_id, fnic->ctlr.map_dest, gw_mac);
271 }
272
273 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
274 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
275 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
276 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
277 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
278
279 flogi_reg_ioreq_end:
280 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
281 return ret;
282 }
283
284 /*
285 * fnic_queue_wq_copy_desc
286 * Routine to enqueue a wq copy desc
287 */
288 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
289 struct vnic_wq_copy *wq,
290 struct fnic_io_req *io_req,
291 struct scsi_cmnd *sc,
292 int sg_count,
293 uint32_t mqtag,
294 uint16_t hwq)
295 {
296 struct scatterlist *sg;
297 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
298 struct fc_rport_libfc_priv *rp = rport->dd_data;
299 struct host_sg_desc *desc;
300 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
301 unsigned int i;
302 int flags;
303 u8 exch_flags;
304 struct scsi_lun fc_lun;
305
306 if (sg_count) {
307 /* For each SGE, create a device desc entry */
308 desc = io_req->sgl_list;
309 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
310 desc->addr = cpu_to_le64(sg_dma_address(sg));
311 desc->len = cpu_to_le32(sg_dma_len(sg));
312 desc->_resvd = 0;
313 desc++;
314 }
315
316 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
317 io_req->sgl_list,
318 sizeof(io_req->sgl_list[0]) * sg_count,
319 DMA_TO_DEVICE);
320 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {
321 printk(KERN_ERR "DMA mapping failed\n");
322 return SCSI_MLQUEUE_HOST_BUSY;
323 }
324 }
325
326 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
327 sc->sense_buffer,
328 SCSI_SENSE_BUFFERSIZE,
329 DMA_FROM_DEVICE);
330 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {
331 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
332 sizeof(io_req->sgl_list[0]) * sg_count,
333 DMA_TO_DEVICE);
334 printk(KERN_ERR "DMA mapping failed\n");
335 return SCSI_MLQUEUE_HOST_BUSY;
336 }
337
338 int_to_scsilun(sc->device->lun, &fc_lun);
339
340 /* Enqueue the descriptor in the Copy WQ */
341 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq])
342 free_wq_copy_descs(fnic, wq, hwq);
343
344 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
345 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
346 "fnic_queue_wq_copy_desc failure - no descriptors\n");
347 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
348 return SCSI_MLQUEUE_HOST_BUSY;
349 }
350
351 flags = 0;
352 if (sc->sc_data_direction == DMA_FROM_DEVICE)
353 flags = FCPIO_ICMND_RDDATA;
354 else if (sc->sc_data_direction == DMA_TO_DEVICE)
355 flags = FCPIO_ICMND_WRDATA;
356
357 exch_flags = 0;
358 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
359 (rp->flags & FC_RP_FLAGS_RETRY))
360 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
361
362 fnic_queue_wq_copy_desc_icmnd_16(wq, mqtag,
363 0, exch_flags, io_req->sgl_cnt,
364 SCSI_SENSE_BUFFERSIZE,
365 io_req->sgl_list_pa,
366 io_req->sense_buf_pa,
367 0, /* scsi cmd ref, always 0 */
368 FCPIO_ICMND_PTA_SIMPLE,
369 /* scsi pri and tag */
370 flags, /* command flags */
371 sc->cmnd, sc->cmd_len,
372 scsi_bufflen(sc),
373 fc_lun.scsi_lun, io_req->port_id,
374 rport->maxframe_size, rp->r_a_tov,
375 rp->e_d_tov);
376
377 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
378 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
379 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
380 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
381 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
382
383 return 0;
384 }
385
386 int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc)
387 {
388 struct request *const rq = scsi_cmd_to_rq(sc);
389 uint32_t mqtag = 0;
390 void (*done)(struct scsi_cmnd *) = scsi_done;
391 struct fc_lport *lp = shost_priv(sc->device->host);
392 struct fc_rport *rport;
393 struct fnic_io_req *io_req = NULL;
394 struct fnic *fnic = lport_priv(lp);
395 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
396 struct vnic_wq_copy *wq;
397 int ret = 1;
398 u64 cmd_trace;
399 int sg_count = 0;
400 unsigned long flags = 0;
401 unsigned long ptr;
402 int io_lock_acquired = 0;
403 struct fc_rport_libfc_priv *rp;
404 uint16_t hwq = 0;
405
406 mqtag = blk_mq_unique_tag(rq);
407 spin_lock_irqsave(&fnic->fnic_lock, flags);
408
409 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) {
410 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
411 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
412 "fnic IO blocked flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n",
413 fnic->state_flags);
414 return SCSI_MLQUEUE_HOST_BUSY;
415 }
416
417 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) {
418 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
419 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
420 "fnic flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n",
421 fnic->state_flags);
422 return SCSI_MLQUEUE_HOST_BUSY;
423 }
424
425 rport = starget_to_rport(scsi_target(sc->device));
426 if (!rport) {
427 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
428 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
429 "returning DID_NO_CONNECT for IO as rport is NULL\n");
430 sc->result = DID_NO_CONNECT << 16;
431 done(sc);
432 return 0;
433 }
434
435 ret = fc_remote_port_chkready(rport);
436 if (ret) {
437 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
439 "rport is not ready\n");
440 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
441 sc->result = ret;
442 done(sc);
443 return 0;
444 }
445
446 rp = rport->dd_data;
447 if (!rp || rp->rp_state == RPORT_ST_DELETE) {
448 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
449 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
450 "rport 0x%x removed, returning DID_NO_CONNECT\n",
451 rport->port_id);
452
453 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
454 sc->result = DID_NO_CONNECT<<16;
455 done(sc);
456 return 0;
457 }
458
459 if (rp->rp_state != RPORT_ST_READY) {
460 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
461 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
462 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
463 rport->port_id, rp->rp_state);
464
465 sc->result = DID_IMM_RETRY << 16;
466 done(sc);
467 return 0;
468 }
469
470 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
471 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
472 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
473 "state not ready: %d/link not up: %d Returning HOST_BUSY\n",
474 lp->state, lp->link_up);
475 return SCSI_MLQUEUE_HOST_BUSY;
476 }
477
478 atomic_inc(&fnic->in_flight);
479
480 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
481 fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED;
482 fnic_priv(sc)->flags = FNIC_NO_FLAGS;
483
484 /* Get a new io_req for this SCSI IO */
485 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
486 if (!io_req) {
487 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
488 ret = SCSI_MLQUEUE_HOST_BUSY;
489 goto out;
490 }
491 memset(io_req, 0, sizeof(*io_req));
492
493 /* Map the data buffer */
494 sg_count = scsi_dma_map(sc);
495 if (sg_count < 0) {
496 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
497 mqtag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state);
498 mempool_free(io_req, fnic->io_req_pool);
499 goto out;
500 }
501
502 /* Determine the type of scatter/gather list we need */
503 io_req->sgl_cnt = sg_count;
504 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
505 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
506 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
507
508 if (sg_count) {
509 io_req->sgl_list =
510 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
511 GFP_ATOMIC);
512 if (!io_req->sgl_list) {
513 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
514 ret = SCSI_MLQUEUE_HOST_BUSY;
515 scsi_dma_unmap(sc);
516 mempool_free(io_req, fnic->io_req_pool);
517 goto out;
518 }
519
520 /* Cache sgl list allocated address before alignment */
521 io_req->sgl_list_alloc = io_req->sgl_list;
522 ptr = (unsigned long) io_req->sgl_list;
523 if (ptr % FNIC_SG_DESC_ALIGN) {
524 io_req->sgl_list = (struct host_sg_desc *)
525 (((unsigned long) ptr
526 + FNIC_SG_DESC_ALIGN - 1)
527 & ~(FNIC_SG_DESC_ALIGN - 1));
528 }
529 }
530
531 /*
532 * Will acquire lock before setting to IO initialized.
533 */
534 hwq = blk_mq_unique_tag_to_hwq(mqtag);
535 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
536
537 /* initialize rest of io_req */
538 io_lock_acquired = 1;
539 io_req->port_id = rport->port_id;
540 io_req->start_time = jiffies;
541 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING;
542 fnic_priv(sc)->io_req = io_req;
543 fnic_priv(sc)->flags |= FNIC_IO_INITIALIZED;
544 io_req->sc = sc;
545
546 if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL) {
547 WARN(1, "fnic<%d>: %s: hwq: %d tag 0x%x already exists\n",
548 fnic->fnic_num, __func__, hwq, blk_mq_unique_tag_to_tag(mqtag));
549 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
550 return SCSI_MLQUEUE_HOST_BUSY;
551 }
552
553 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = io_req;
554 io_req->tag = mqtag;
555
556 /* create copy wq desc and enqueue it */
557 wq = &fnic->hw_copy_wq[hwq];
558 atomic64_inc(&fnic_stats->io_stats.ios[hwq]);
559 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count, mqtag, hwq);
560 if (ret) {
561 /*
562 * In case another thread cancelled the request,
563 * refetch the pointer under the lock.
564 */
565 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
566 mqtag, sc, 0, 0, 0, fnic_flags_and_state(sc));
567 io_req = fnic_priv(sc)->io_req;
568 fnic_priv(sc)->io_req = NULL;
569 if (io_req)
570 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = NULL;
571 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;
572 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
573 if (io_req) {
574 fnic_release_ioreq_buf(fnic, io_req, sc);
575 mempool_free(io_req, fnic->io_req_pool);
576 }
577 atomic_dec(&fnic->in_flight);
578 return ret;
579 } else {
580 atomic64_inc(&fnic_stats->io_stats.active_ios);
581 atomic64_inc(&fnic_stats->io_stats.num_ios);
582 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
583 atomic64_read(&fnic_stats->io_stats.max_active_ios))
584 atomic64_set(&fnic_stats->io_stats.max_active_ios,
585 atomic64_read(&fnic_stats->io_stats.active_ios));
586
587 /* REVISIT: Use per IO lock in the final code */
588 fnic_priv(sc)->flags |= FNIC_IO_ISSUED;
589 }
590 out:
591 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
592 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
593 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
594 sc->cmnd[5]);
595
596 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
597 mqtag, sc, io_req, sg_count, cmd_trace,
598 fnic_flags_and_state(sc));
599
600 /* if only we issued IO, will we have the io lock */
601 if (io_lock_acquired)
602 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
603
604 atomic_dec(&fnic->in_flight);
605 return ret;
606 }
607
608
609 /*
610 * fnic_fcpio_fw_reset_cmpl_handler
611 * Routine to handle fw reset completion
612 */
613 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
614 struct fcpio_fw_req *desc)
615 {
616 u8 type;
617 u8 hdr_status;
618 struct fcpio_tag tag;
619 int ret = 0;
620 unsigned long flags;
621 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
622
623 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
624
625 atomic64_inc(&reset_stats->fw_reset_completions);
626
627 /* Clean up all outstanding io requests */
628 fnic_cleanup_io(fnic);
629
630 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
631 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
632 atomic64_set(&fnic->io_cmpl_skip, 0);
633
634 spin_lock_irqsave(&fnic->fnic_lock, flags);
635
636 /* fnic should be in FC_TRANS_ETH_MODE */
637 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
638 /* Check status of reset completion */
639 if (!hdr_status) {
640 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
641 "reset cmpl success\n");
642 /* Ready to send flogi out */
643 fnic->state = FNIC_IN_ETH_MODE;
644 } else {
645 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
646 "reset failed with header status: %s\n",
647 fnic_fcpio_status_to_str(hdr_status));
648
649 /*
650 * Unable to change to eth mode, cannot send out flogi
651 * Change state to fc mode, so that subsequent Flogi
652 * requests from libFC will cause more attempts to
653 * reset the firmware. Free the cached flogi
654 */
655 fnic->state = FNIC_IN_FC_MODE;
656 atomic64_inc(&reset_stats->fw_reset_failures);
657 ret = -1;
658 }
659 } else {
660 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
661 "Unexpected state while processing reset completion: %s\n",
662 fnic_state_to_str(fnic->state));
663 atomic64_inc(&reset_stats->fw_reset_failures);
664 ret = -1;
665 }
666
667 /* Thread removing device blocks till firmware reset is complete */
668 if (fnic->remove_wait)
669 complete(fnic->remove_wait);
670
671 /*
672 * If fnic is being removed, or fw reset failed
673 * free the flogi frame. Else, send it out
674 */
675 if (fnic->remove_wait || ret) {
676 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
677 skb_queue_purge(&fnic->tx_queue);
678 goto reset_cmpl_handler_end;
679 }
680
681 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
682
683 queue_work(fnic_event_queue, &fnic->flush_work);
684
685 reset_cmpl_handler_end:
686 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
687
688 return ret;
689 }
690
691 /*
692 * fnic_fcpio_flogi_reg_cmpl_handler
693 * Routine to handle flogi register completion
694 */
695 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
696 struct fcpio_fw_req *desc)
697 {
698 u8 type;
699 u8 hdr_status;
700 struct fcpio_tag tag;
701 int ret = 0;
702 unsigned long flags;
703
704 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
705
706 /* Update fnic state based on status of flogi reg completion */
707 spin_lock_irqsave(&fnic->fnic_lock, flags);
708
709 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
710
711 /* Check flogi registration completion status */
712 if (!hdr_status) {
713 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
714 "flog reg succeeded\n");
715 fnic->state = FNIC_IN_FC_MODE;
716 } else {
717 FNIC_SCSI_DBG(KERN_DEBUG,
718 fnic->lport->host, fnic->fnic_num,
719 "fnic flogi reg :failed %s\n",
720 fnic_fcpio_status_to_str(hdr_status));
721 fnic->state = FNIC_IN_ETH_MODE;
722 ret = -1;
723 }
724 } else {
725 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
726 "Unexpected fnic state %s while"
727 " processing flogi reg completion\n",
728 fnic_state_to_str(fnic->state));
729 ret = -1;
730 }
731
732 if (!ret) {
733 if (fnic->stop_rx_link_events) {
734 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
735 goto reg_cmpl_handler_end;
736 }
737 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
738
739 queue_work(fnic_event_queue, &fnic->flush_work);
740 queue_work(fnic_event_queue, &fnic->frame_work);
741 } else {
742 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
743 }
744
745 reg_cmpl_handler_end:
746 return ret;
747 }
748
749 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
750 u16 request_out)
751 {
752 if (wq->to_clean_index <= wq->to_use_index) {
753 /* out of range, stale request_out index */
754 if (request_out < wq->to_clean_index ||
755 request_out >= wq->to_use_index)
756 return 0;
757 } else {
758 /* out of range, stale request_out index */
759 if (request_out < wq->to_clean_index &&
760 request_out >= wq->to_use_index)
761 return 0;
762 }
763 /* request_out index is in range */
764 return 1;
765 }
766
767
768 /*
769 * Mark that ack received and store the Ack index. If there are multiple
770 * acks received before Tx thread cleans it up, the latest value will be
771 * used which is correct behavior. This state should be in the copy Wq
772 * instead of in the fnic
773 */
774 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
775 unsigned int cq_index,
776 struct fcpio_fw_req *desc)
777 {
778 struct vnic_wq_copy *wq;
779 u16 request_out = desc->u.ack.request_out;
780 unsigned long flags;
781 u64 *ox_id_tag = (u64 *)(void *)desc;
782 unsigned int wq_index = cq_index;
783
784 /* mark the ack state */
785 wq = &fnic->hw_copy_wq[cq_index];
786 spin_lock_irqsave(&fnic->wq_copy_lock[wq_index], flags);
787
788 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
789 if (is_ack_index_in_range(wq, request_out)) {
790 fnic->fw_ack_index[wq_index] = request_out;
791 fnic->fw_ack_recd[wq_index] = 1;
792 } else
793 atomic64_inc(
794 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
795
796 spin_unlock_irqrestore(&fnic->wq_copy_lock[wq_index], flags);
797 FNIC_TRACE(fnic_fcpio_ack_handler,
798 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
799 ox_id_tag[4], ox_id_tag[5]);
800 }
801
802 /*
803 * fnic_fcpio_icmnd_cmpl_handler
804 * Routine to handle icmnd completions
805 */
806 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, unsigned int cq_index,
807 struct fcpio_fw_req *desc)
808 {
809 u8 type;
810 u8 hdr_status;
811 struct fcpio_tag ftag;
812 u32 id;
813 u64 xfer_len = 0;
814 struct fcpio_icmnd_cmpl *icmnd_cmpl;
815 struct fnic_io_req *io_req;
816 struct scsi_cmnd *sc;
817 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
818 unsigned long flags;
819 u64 cmd_trace;
820 unsigned long start_time;
821 unsigned long io_duration_time;
822 unsigned int hwq = 0;
823 unsigned int mqtag = 0;
824 unsigned int tag = 0;
825
826 /* Decode the cmpl description to get the io_req id */
827 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag);
828 fcpio_tag_id_dec(&ftag, &id);
829 icmnd_cmpl = &desc->u.icmnd_cmpl;
830
831 mqtag = id;
832 tag = blk_mq_unique_tag_to_tag(mqtag);
833 hwq = blk_mq_unique_tag_to_hwq(mqtag);
834
835 if (hwq != cq_index) {
836 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
837 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",
838 hwq, mqtag, tag, cq_index);
839 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
840 "hdr status: %s icmnd completion on the wrong queue\n",
841 fnic_fcpio_status_to_str(hdr_status));
842 }
843
844 if (tag >= fnic->fnic_max_tag_id) {
845 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
846 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",
847 hwq, mqtag, tag, cq_index);
848 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
849 "hdr status: %s Out of range tag\n",
850 fnic_fcpio_status_to_str(hdr_status));
851 return;
852 }
853 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
854
855 sc = scsi_host_find_tag(fnic->lport->host, id);
856 WARN_ON_ONCE(!sc);
857 if (!sc) {
858 atomic64_inc(&fnic_stats->io_stats.sc_null);
859 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
860 shost_printk(KERN_ERR, fnic->lport->host,
861 "icmnd_cmpl sc is null - "
862 "hdr status = %s tag = 0x%x desc = 0x%p\n",
863 fnic_fcpio_status_to_str(hdr_status), id, desc);
864 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
865 fnic->lport->host->host_no, id,
866 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
867 (u64)icmnd_cmpl->_resvd0[0]),
868 ((u64)hdr_status << 16 |
869 (u64)icmnd_cmpl->scsi_status << 8 |
870 (u64)icmnd_cmpl->flags), desc,
871 (u64)icmnd_cmpl->residual, 0);
872 return;
873 }
874
875 io_req = fnic_priv(sc)->io_req;
876 if (fnic->sw_copy_wq[hwq].io_req_table[tag] != io_req) {
877 WARN(1, "%s: %d: hwq: %d mqtag: 0x%x tag: 0x%x io_req tag mismatch\n",
878 __func__, __LINE__, hwq, mqtag, tag);
879 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
880 return;
881 }
882
883 WARN_ON_ONCE(!io_req);
884 if (!io_req) {
885 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
886 fnic_priv(sc)->flags |= FNIC_IO_REQ_NULL;
887 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
888 shost_printk(KERN_ERR, fnic->lport->host,
889 "icmnd_cmpl io_req is null - "
890 "hdr status = %s tag = 0x%x sc 0x%p\n",
891 fnic_fcpio_status_to_str(hdr_status), id, sc);
892 return;
893 }
894 start_time = io_req->start_time;
895
896 /* firmware completed the io */
897 io_req->io_completed = 1;
898
899 /*
900 * if SCSI-ML has already issued abort on this command,
901 * set completion of the IO. The abts path will clean it up
902 */
903 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
904
905 /*
906 * set the FNIC_IO_DONE so that this doesn't get
907 * flagged as 'out of order' if it was not aborted
908 */
909 fnic_priv(sc)->flags |= FNIC_IO_DONE;
910 fnic_priv(sc)->flags |= FNIC_IO_ABTS_PENDING;
911 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
912 if(FCPIO_ABORTED == hdr_status)
913 fnic_priv(sc)->flags |= FNIC_IO_ABORTED;
914
915 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
916 "icmnd_cmpl abts pending "
917 "hdr status = %s tag = 0x%x sc = 0x%p "
918 "scsi_status = %x residual = %d\n",
919 fnic_fcpio_status_to_str(hdr_status),
920 id, sc,
921 icmnd_cmpl->scsi_status,
922 icmnd_cmpl->residual);
923 return;
924 }
925
926 /* Mark the IO as complete */
927 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;
928
929 icmnd_cmpl = &desc->u.icmnd_cmpl;
930
931 switch (hdr_status) {
932 case FCPIO_SUCCESS:
933 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
934 xfer_len = scsi_bufflen(sc);
935
936 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) {
937 xfer_len -= icmnd_cmpl->residual;
938 scsi_set_resid(sc, icmnd_cmpl->residual);
939 }
940
941 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
942 atomic64_inc(&fnic_stats->misc_stats.check_condition);
943
944 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
945 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
946 break;
947
948 case FCPIO_TIMEOUT: /* request was timed out */
949 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
950 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
951 break;
952
953 case FCPIO_ABORTED: /* request was aborted */
954 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
955 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
956 break;
957
958 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
959 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
960 scsi_set_resid(sc, icmnd_cmpl->residual);
961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
962 break;
963
964 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
965 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
966 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
967 break;
968
969 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
970 atomic64_inc(&fnic_stats->io_stats.io_not_found);
971 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
972 break;
973
974 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
975 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
976 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
977 break;
978
979 case FCPIO_FW_ERR: /* request was terminated due fw error */
980 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
981 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
982 break;
983
984 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
985 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
986 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
987 break;
988
989 case FCPIO_INVALID_HEADER: /* header contains invalid data */
990 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
991 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
992 default:
993 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
994 break;
995 }
996
997 /* Break link with the SCSI command */
998 fnic_priv(sc)->io_req = NULL;
999 io_req->sc = NULL;
1000 fnic_priv(sc)->flags |= FNIC_IO_DONE;
1001 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL;
1002
1003 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1004
1005 if (hdr_status != FCPIO_SUCCESS) {
1006 atomic64_inc(&fnic_stats->io_stats.io_failures);
1007 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
1008 fnic_fcpio_status_to_str(hdr_status));
1009 }
1010
1011 fnic_release_ioreq_buf(fnic, io_req, sc);
1012
1013 cmd_trace = ((u64)hdr_status << 56) |
1014 (u64)icmnd_cmpl->scsi_status << 48 |
1015 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
1016 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1017 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
1018
1019 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
1020 sc->device->host->host_no, id, sc,
1021 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
1022 (u64)icmnd_cmpl->_resvd0[0] << 48 |
1023 jiffies_to_msecs(jiffies - start_time)),
1024 desc, cmd_trace, fnic_flags_and_state(sc));
1025
1026 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1027 fnic->lport->host_stats.fcp_input_requests++;
1028 fnic->fcp_input_bytes += xfer_len;
1029 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1030 fnic->lport->host_stats.fcp_output_requests++;
1031 fnic->fcp_output_bytes += xfer_len;
1032 } else
1033 fnic->lport->host_stats.fcp_control_requests++;
1034
1035 /* Call SCSI completion function to complete the IO */
1036 scsi_done(sc);
1037
1038 mempool_free(io_req, fnic->io_req_pool);
1039
1040 atomic64_dec(&fnic_stats->io_stats.active_ios);
1041 if (atomic64_read(&fnic->io_cmpl_skip))
1042 atomic64_dec(&fnic->io_cmpl_skip);
1043 else
1044 atomic64_inc(&fnic_stats->io_stats.io_completions);
1045
1046
1047 io_duration_time = jiffies_to_msecs(jiffies) -
1048 jiffies_to_msecs(start_time);
1049
1050 if(io_duration_time <= 10)
1051 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
1052 else if(io_duration_time <= 100)
1053 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
1054 else if(io_duration_time <= 500)
1055 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
1056 else if(io_duration_time <= 5000)
1057 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
1058 else if(io_duration_time <= 10000)
1059 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
1060 else if(io_duration_time <= 30000)
1061 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
1062 else {
1063 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
1064
1065 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
1066 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
1067 }
1068 }
1069
1070 /* fnic_fcpio_itmf_cmpl_handler
1071 * Routine to handle itmf completions
1072 */
1073 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, unsigned int cq_index,
1074 struct fcpio_fw_req *desc)
1075 {
1076 u8 type;
1077 u8 hdr_status;
1078 struct fcpio_tag ftag;
1079 u32 id;
1080 struct scsi_cmnd *sc = NULL;
1081 struct fnic_io_req *io_req;
1082 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1083 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1084 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1085 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1086 unsigned long flags;
1087 unsigned long start_time;
1088 unsigned int hwq = cq_index;
1089 unsigned int mqtag;
1090 unsigned int tag;
1091
1092 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag);
1093 fcpio_tag_id_dec(&ftag, &id);
1094
1095 mqtag = id & FNIC_TAG_MASK;
1096 tag = blk_mq_unique_tag_to_tag(id & FNIC_TAG_MASK);
1097 hwq = blk_mq_unique_tag_to_hwq(id & FNIC_TAG_MASK);
1098
1099 if (hwq != cq_index) {
1100 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1101 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",
1102 hwq, mqtag, tag, cq_index);
1103 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1104 "hdr status: %s ITMF completion on the wrong queue\n",
1105 fnic_fcpio_status_to_str(hdr_status));
1106 }
1107
1108 if (tag > fnic->fnic_max_tag_id) {
1109 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1110 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",
1111 hwq, mqtag, tag, cq_index);
1112 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1113 "hdr status: %s Tag out of range\n",
1114 fnic_fcpio_status_to_str(hdr_status));
1115 return;
1116 } else if ((tag == fnic->fnic_max_tag_id) && !(id & FNIC_TAG_DEV_RST)) {
1117 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1118 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",
1119 hwq, mqtag, tag, cq_index);
1120 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1121 "hdr status: %s Tag out of range\n",
1122 fnic_fcpio_status_to_str(hdr_status));
1123 return;
1124 }
1125
1126 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1127
1128 /* If it is sg3utils allocated SC then tag_id
1129 * is max_tag_id and SC is retrieved from io_req
1130 */
1131 if ((mqtag == fnic->fnic_max_tag_id) && (id & FNIC_TAG_DEV_RST)) {
1132 io_req = fnic->sw_copy_wq[hwq].io_req_table[tag];
1133 if (io_req)
1134 sc = io_req->sc;
1135 } else {
1136 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1137 }
1138
1139 WARN_ON_ONCE(!sc);
1140 if (!sc) {
1141 atomic64_inc(&fnic_stats->io_stats.sc_null);
1142 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1143 shost_printk(KERN_ERR, fnic->lport->host,
1144 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1145 fnic_fcpio_status_to_str(hdr_status), tag);
1146 return;
1147 }
1148
1149 io_req = fnic_priv(sc)->io_req;
1150 WARN_ON_ONCE(!io_req);
1151 if (!io_req) {
1152 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1153 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1154 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
1155 shost_printk(KERN_ERR, fnic->lport->host,
1156 "itmf_cmpl io_req is null - "
1157 "hdr status = %s tag = 0x%x sc 0x%p\n",
1158 fnic_fcpio_status_to_str(hdr_status), tag, sc);
1159 return;
1160 }
1161 start_time = io_req->start_time;
1162
1163 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1164 /* Abort and terminate completion of device reset req */
1165 /* REVISIT : Add asserts about various flags */
1166 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
1167 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Abt/term completion received\n",
1168 hwq, mqtag, tag,
1169 fnic_fcpio_status_to_str(hdr_status));
1170 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
1171 fnic_priv(sc)->abts_status = hdr_status;
1172 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;
1173 if (io_req->abts_done)
1174 complete(io_req->abts_done);
1175 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1176 } else if (id & FNIC_TAG_ABORT) {
1177 /* Completion of abort cmd */
1178 shost_printk(KERN_DEBUG, fnic->lport->host,
1179 "hwq: %d mqtag: 0x%x tag: 0x%x Abort header status: %s\n",
1180 hwq, mqtag, tag,
1181 fnic_fcpio_status_to_str(hdr_status));
1182 switch (hdr_status) {
1183 case FCPIO_SUCCESS:
1184 break;
1185 case FCPIO_TIMEOUT:
1186 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)
1187 atomic64_inc(&abts_stats->abort_fw_timeouts);
1188 else
1189 atomic64_inc(
1190 &term_stats->terminate_fw_timeouts);
1191 break;
1192 case FCPIO_ITMF_REJECTED:
1193 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
1194 "abort reject recd. id %d\n",
1195 (int)(id & FNIC_TAG_MASK));
1196 break;
1197 case FCPIO_IO_NOT_FOUND:
1198 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)
1199 atomic64_inc(&abts_stats->abort_io_not_found);
1200 else
1201 atomic64_inc(
1202 &term_stats->terminate_io_not_found);
1203 break;
1204 default:
1205 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)
1206 atomic64_inc(&abts_stats->abort_failures);
1207 else
1208 atomic64_inc(
1209 &term_stats->terminate_failures);
1210 break;
1211 }
1212 if (fnic_priv(sc)->state != FNIC_IOREQ_ABTS_PENDING) {
1213 /* This is a late completion. Ignore it */
1214 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1215 return;
1216 }
1217
1218 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE;
1219 fnic_priv(sc)->abts_status = hdr_status;
1220
1221 /* If the status is IO not found consider it as success */
1222 if (hdr_status == FCPIO_IO_NOT_FOUND)
1223 fnic_priv(sc)->abts_status = FCPIO_SUCCESS;
1224
1225 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1226 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1227
1228 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1229 "abts cmpl recd. id %d status %s\n",
1230 (int)(id & FNIC_TAG_MASK),
1231 fnic_fcpio_status_to_str(hdr_status));
1232
1233 /*
1234 * If scsi_eh thread is blocked waiting for abts to complete,
1235 * signal completion to it. IO will be cleaned in the thread
1236 * else clean it in this context
1237 */
1238 if (io_req->abts_done) {
1239 complete(io_req->abts_done);
1240 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1241 shost_printk(KERN_INFO, fnic->lport->host,
1242 "hwq: %d mqtag: 0x%x tag: 0x%x Waking up abort thread\n",
1243 hwq, mqtag, tag);
1244 } else {
1245 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1246 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Completing IO\n",
1247 hwq, mqtag,
1248 tag, fnic_fcpio_status_to_str(hdr_status));
1249 fnic_priv(sc)->io_req = NULL;
1250 sc->result = (DID_ERROR << 16);
1251 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL;
1252 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1253
1254 fnic_release_ioreq_buf(fnic, io_req, sc);
1255 mempool_free(io_req, fnic->io_req_pool);
1256 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1257 sc->device->host->host_no, id,
1258 sc,
1259 jiffies_to_msecs(jiffies - start_time),
1260 desc,
1261 (((u64)hdr_status << 40) |
1262 (u64)sc->cmnd[0] << 32 |
1263 (u64)sc->cmnd[2] << 24 |
1264 (u64)sc->cmnd[3] << 16 |
1265 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1266 fnic_flags_and_state(sc));
1267 scsi_done(sc);
1268 atomic64_dec(&fnic_stats->io_stats.active_ios);
1269 if (atomic64_read(&fnic->io_cmpl_skip))
1270 atomic64_dec(&fnic->io_cmpl_skip);
1271 else
1272 atomic64_inc(&fnic_stats->io_stats.io_completions);
1273 }
1274 } else if (id & FNIC_TAG_DEV_RST) {
1275 /* Completion of device reset */
1276 shost_printk(KERN_INFO, fnic->lport->host,
1277 "hwq: %d mqtag: 0x%x tag: 0x%x DR hst: %s\n",
1278 hwq, mqtag,
1279 tag, fnic_fcpio_status_to_str(hdr_status));
1280 fnic_priv(sc)->lr_status = hdr_status;
1281 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
1282 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1283 fnic_priv(sc)->flags |= FNIC_DEV_RST_ABTS_PENDING;
1284 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1285 sc->device->host->host_no, id, sc,
1286 jiffies_to_msecs(jiffies - start_time),
1287 desc, 0, fnic_flags_and_state(sc));
1288 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1289 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Terminate pending\n",
1290 hwq, mqtag,
1291 tag, fnic_fcpio_status_to_str(hdr_status));
1292 return;
1293 }
1294 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TIMED_OUT) {
1295 /* Need to wait for terminate completion */
1296 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1297 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1298 sc->device->host->host_no, id, sc,
1299 jiffies_to_msecs(jiffies - start_time),
1300 desc, 0, fnic_flags_and_state(sc));
1301 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1302 "dev reset cmpl recd after time out. "
1303 "id %d status %s\n",
1304 (int)(id & FNIC_TAG_MASK),
1305 fnic_fcpio_status_to_str(hdr_status));
1306 return;
1307 }
1308 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;
1309 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;
1310 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
1311 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s DR completion received\n",
1312 hwq, mqtag,
1313 tag, fnic_fcpio_status_to_str(hdr_status));
1314 if (io_req->dr_done)
1315 complete(io_req->dr_done);
1316 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1317
1318 } else {
1319 shost_printk(KERN_ERR, fnic->lport->host,
1320 "%s: Unexpected itmf io state: hwq: %d tag 0x%x %s\n",
1321 __func__, hwq, id, fnic_ioreq_state_to_str(fnic_priv(sc)->state));
1322 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1323 }
1324
1325 }
1326
1327 /*
1328 * fnic_fcpio_cmpl_handler
1329 * Routine to service the cq for wq_copy
1330 */
1331 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1332 unsigned int cq_index,
1333 struct fcpio_fw_req *desc)
1334 {
1335 struct fnic *fnic = vnic_dev_priv(vdev);
1336
1337 switch (desc->hdr.type) {
1338 case FCPIO_ICMND_CMPL: /* fw completed a command */
1339 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1340 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1341 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1342 case FCPIO_RESET_CMPL: /* fw completed reset */
1343 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1344 break;
1345 default:
1346 break;
1347 }
1348
1349 cq_index -= fnic->copy_wq_base;
1350
1351 switch (desc->hdr.type) {
1352 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1353 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1354 break;
1355
1356 case FCPIO_ICMND_CMPL: /* fw completed a command */
1357 fnic_fcpio_icmnd_cmpl_handler(fnic, cq_index, desc);
1358 break;
1359
1360 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1361 fnic_fcpio_itmf_cmpl_handler(fnic, cq_index, desc);
1362 break;
1363
1364 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1365 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1366 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1367 break;
1368
1369 case FCPIO_RESET_CMPL: /* fw completed reset */
1370 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1371 break;
1372
1373 default:
1374 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1375 "firmware completion type %d\n",
1376 desc->hdr.type);
1377 break;
1378 }
1379
1380 return 0;
1381 }
1382
1383 /*
1384 * fnic_wq_copy_cmpl_handler
1385 * Routine to process wq copy
1386 */
1387 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do, unsigned int cq_index)
1388 {
1389 unsigned int cur_work_done;
1390 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1391 u64 start_jiffies = 0;
1392 u64 end_jiffies = 0;
1393 u64 delta_jiffies = 0;
1394 u64 delta_ms = 0;
1395
1396 start_jiffies = jiffies;
1397 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1398 fnic_fcpio_cmpl_handler,
1399 copy_work_to_do);
1400 end_jiffies = jiffies;
1401 delta_jiffies = end_jiffies - start_jiffies;
1402 if (delta_jiffies > (u64) atomic64_read(&misc_stats->max_isr_jiffies)) {
1403 atomic64_set(&misc_stats->max_isr_jiffies, delta_jiffies);
1404 delta_ms = jiffies_to_msecs(delta_jiffies);
1405 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);
1406 atomic64_set(&misc_stats->corr_work_done, cur_work_done);
1407 }
1408
1409 return cur_work_done;
1410 }
1411
1412 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data)
1413 {
1414 struct request *const rq = scsi_cmd_to_rq(sc);
1415 struct fnic *fnic = data;
1416 struct fnic_io_req *io_req;
1417 unsigned long flags = 0;
1418 unsigned long start_time = 0;
1419 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1420 uint16_t hwq = 0;
1421 int tag;
1422 int mqtag;
1423
1424 mqtag = blk_mq_unique_tag(rq);
1425 hwq = blk_mq_unique_tag_to_hwq(mqtag);
1426 tag = blk_mq_unique_tag_to_tag(mqtag);
1427
1428 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1429
1430 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL;
1431
1432 io_req = fnic_priv(sc)->io_req;
1433 if (!io_req) {
1434 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1435 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1436 "hwq: %d mqtag: 0x%x tag: 0x%x flags: 0x%x No ioreq. Returning\n",
1437 hwq, mqtag, tag, fnic_priv(sc)->flags);
1438 return true;
1439 }
1440
1441 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&
1442 !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) {
1443 /*
1444 * We will be here only when FW completes reset
1445 * without sending completions for outstanding ios.
1446 */
1447 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;
1448 if (io_req && io_req->dr_done)
1449 complete(io_req->dr_done);
1450 else if (io_req && io_req->abts_done)
1451 complete(io_req->abts_done);
1452 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1453 return true;
1454 } else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {
1455 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1456 return true;
1457 }
1458
1459 fnic_priv(sc)->io_req = NULL;
1460 io_req->sc = NULL;
1461 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1462
1463 /*
1464 * If there is a scsi_cmnd associated with this io_req, then
1465 * free the corresponding state
1466 */
1467 start_time = io_req->start_time;
1468 fnic_release_ioreq_buf(fnic, io_req, sc);
1469 mempool_free(io_req, fnic->io_req_pool);
1470
1471 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1472 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1473 "mqtag:0x%x tag: 0x%x sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
1474 mqtag, tag, sc, (jiffies - start_time));
1475
1476 if (atomic64_read(&fnic->io_cmpl_skip))
1477 atomic64_dec(&fnic->io_cmpl_skip);
1478 else
1479 atomic64_inc(&fnic_stats->io_stats.io_completions);
1480
1481 FNIC_TRACE(fnic_cleanup_io,
1482 sc->device->host->host_no, tag, sc,
1483 jiffies_to_msecs(jiffies - start_time),
1484 0, ((u64)sc->cmnd[0] << 32 |
1485 (u64)sc->cmnd[2] << 24 |
1486 (u64)sc->cmnd[3] << 16 |
1487 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1488 fnic_flags_and_state(sc));
1489
1490 scsi_done(sc);
1491
1492 return true;
1493 }
1494
1495 static void fnic_cleanup_io(struct fnic *fnic)
1496 {
1497 scsi_host_busy_iter(fnic->lport->host,
1498 fnic_cleanup_io_iter, fnic);
1499 }
1500
1501 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1502 struct fcpio_host_req *desc)
1503 {
1504 u32 id;
1505 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1506 struct fnic_io_req *io_req;
1507 struct scsi_cmnd *sc;
1508 unsigned long flags;
1509 unsigned long start_time = 0;
1510 uint16_t hwq;
1511
1512 /* get the tag reference */
1513 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1514 id &= FNIC_TAG_MASK;
1515
1516 if (id >= fnic->fnic_max_tag_id)
1517 return;
1518
1519 sc = scsi_host_find_tag(fnic->lport->host, id);
1520 if (!sc)
1521 return;
1522
1523 hwq = blk_mq_unique_tag_to_hwq(id);
1524 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1525
1526 /* Get the IO context which this desc refers to */
1527 io_req = fnic_priv(sc)->io_req;
1528
1529 /* fnic interrupts are turned off by now */
1530
1531 if (!io_req) {
1532 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1533 goto wq_copy_cleanup_scsi_cmd;
1534 }
1535
1536 fnic_priv(sc)->io_req = NULL;
1537 io_req->sc = NULL;
1538 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(id)] = NULL;
1539
1540 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1541
1542 start_time = io_req->start_time;
1543 fnic_release_ioreq_buf(fnic, io_req, sc);
1544 mempool_free(io_req, fnic->io_req_pool);
1545
1546 wq_copy_cleanup_scsi_cmd:
1547 sc->result = DID_NO_CONNECT << 16;
1548 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, "wq_copy_cleanup_handler:"
1549 " DID_NO_CONNECT\n");
1550
1551 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1552 sc->device->host->host_no, id, sc,
1553 jiffies_to_msecs(jiffies - start_time),
1554 0, ((u64)sc->cmnd[0] << 32 |
1555 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1556 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1557 fnic_flags_and_state(sc));
1558
1559 scsi_done(sc);
1560 }
1561
1562 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1563 u32 task_req, u8 *fc_lun,
1564 struct fnic_io_req *io_req,
1565 unsigned int hwq)
1566 {
1567 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[hwq];
1568 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1569 unsigned long flags;
1570
1571 spin_lock_irqsave(&fnic->fnic_lock, flags);
1572 if (unlikely(fnic_chk_state_flags_locked(fnic,
1573 FNIC_FLAGS_IO_BLOCKED))) {
1574 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1575 return 1;
1576 } else
1577 atomic_inc(&fnic->in_flight);
1578 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1579
1580 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1581
1582 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq])
1583 free_wq_copy_descs(fnic, wq, hwq);
1584
1585 if (!vnic_wq_copy_desc_avail(wq)) {
1586 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1587 atomic_dec(&fnic->in_flight);
1588 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1589 "fnic_queue_abort_io_req: failure: no descriptors\n");
1590 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1591 return 1;
1592 }
1593 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1594 0, task_req, tag, fc_lun, io_req->port_id,
1595 fnic->config.ra_tov, fnic->config.ed_tov);
1596
1597 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1598 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1599 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1600 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1601 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1602
1603 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1604 atomic_dec(&fnic->in_flight);
1605
1606 return 0;
1607 }
1608
1609 struct fnic_rport_abort_io_iter_data {
1610 struct fnic *fnic;
1611 u32 port_id;
1612 int term_cnt;
1613 };
1614
1615 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)
1616 {
1617 struct request *const rq = scsi_cmd_to_rq(sc);
1618 struct fnic_rport_abort_io_iter_data *iter_data = data;
1619 struct fnic *fnic = iter_data->fnic;
1620 int abt_tag = 0;
1621 struct fnic_io_req *io_req;
1622 unsigned long flags;
1623 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1624 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1625 struct scsi_lun fc_lun;
1626 enum fnic_ioreq_state old_ioreq_state;
1627 uint16_t hwq = 0;
1628
1629 abt_tag = blk_mq_unique_tag(rq);
1630 hwq = blk_mq_unique_tag_to_hwq(abt_tag);
1631
1632 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1633
1634 io_req = fnic_priv(sc)->io_req;
1635
1636 if (!io_req || io_req->port_id != iter_data->port_id) {
1637 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1638 return true;
1639 }
1640
1641 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&
1642 !(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED)) {
1643 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1644 "hwq: %d abt_tag: 0x%x flags: 0x%x Device reset is not pending\n",
1645 hwq, abt_tag, fnic_priv(sc)->flags);
1646 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1647 return true;
1648 }
1649
1650 /*
1651 * Found IO that is still pending with firmware and
1652 * belongs to rport that went away
1653 */
1654 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
1655 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1656 return true;
1657 }
1658 if (io_req->abts_done) {
1659 shost_printk(KERN_ERR, fnic->lport->host,
1660 "fnic_rport_exch_reset: io_req->abts_done is set "
1661 "state is %s\n",
1662 fnic_ioreq_state_to_str(fnic_priv(sc)->state));
1663 }
1664
1665 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) {
1666 shost_printk(KERN_ERR, fnic->lport->host,
1667 "rport_exch_reset "
1668 "IO not yet issued %p tag 0x%x flags "
1669 "%x state %d\n",
1670 sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state);
1671 }
1672 old_ioreq_state = fnic_priv(sc)->state;
1673 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
1674 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;
1675 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {
1676 atomic64_inc(&reset_stats->device_reset_terminates);
1677 abt_tag |= FNIC_TAG_DEV_RST;
1678 }
1679 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1680 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc);
1681 BUG_ON(io_req->abts_done);
1682
1683 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1684 "fnic_rport_reset_exch: Issuing abts\n");
1685
1686 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1687
1688 /* Now queue the abort command to firmware */
1689 int_to_scsilun(sc->device->lun, &fc_lun);
1690
1691 if (fnic_queue_abort_io_req(fnic, abt_tag,
1692 FCPIO_ITMF_ABT_TASK_TERM,
1693 fc_lun.scsi_lun, io_req, hwq)) {
1694 /*
1695 * Revert the cmd state back to old state, if
1696 * it hasn't changed in between. This cmd will get
1697 * aborted later by scsi_eh, or cleaned up during
1698 * lun reset
1699 */
1700 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1701 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1702 "hwq: %d abt_tag: 0x%x flags: 0x%x Queuing abort failed\n",
1703 hwq, abt_tag, fnic_priv(sc)->flags);
1704 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)
1705 fnic_priv(sc)->state = old_ioreq_state;
1706 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1707 } else {
1708 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1709 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET)
1710 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
1711 else
1712 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;
1713 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1714 atomic64_inc(&term_stats->terminates);
1715 iter_data->term_cnt++;
1716 }
1717 return true;
1718 }
1719
1720 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1721 {
1722 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1723 struct fnic_rport_abort_io_iter_data iter_data = {
1724 .fnic = fnic,
1725 .port_id = port_id,
1726 .term_cnt = 0,
1727 };
1728
1729 FNIC_SCSI_DBG(KERN_DEBUG,
1730 fnic->lport->host, fnic->fnic_num,
1731 "fnic_rport_exch_reset called portid 0x%06x\n",
1732 port_id);
1733
1734 if (fnic->in_remove)
1735 return;
1736
1737 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter,
1738 &iter_data);
1739 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates))
1740 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt);
1741
1742 }
1743
1744 void fnic_terminate_rport_io(struct fc_rport *rport)
1745 {
1746 struct fc_rport_libfc_priv *rdata;
1747 struct fc_lport *lport;
1748 struct fnic *fnic;
1749
1750 if (!rport) {
1751 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1752 return;
1753 }
1754 rdata = rport->dd_data;
1755
1756 if (!rdata) {
1757 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1758 return;
1759 }
1760 lport = rdata->local_port;
1761
1762 if (!lport) {
1763 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1764 return;
1765 }
1766 fnic = lport_priv(lport);
1767 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1768 "wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1769 rport->port_name, rport->node_name, rport,
1770 rport->port_id);
1771
1772 if (fnic->in_remove)
1773 return;
1774
1775 fnic_rport_exch_reset(fnic, rport->port_id);
1776 }
1777
1778 /*
1779 * This function is exported to SCSI for sending abort cmnds.
1780 * A SCSI IO is represented by a io_req in the driver.
1781 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1782 */
1783 int fnic_abort_cmd(struct scsi_cmnd *sc)
1784 {
1785 struct request *const rq = scsi_cmd_to_rq(sc);
1786 struct fc_lport *lp;
1787 struct fnic *fnic;
1788 struct fnic_io_req *io_req = NULL;
1789 struct fc_rport *rport;
1790 unsigned long flags;
1791 unsigned long start_time = 0;
1792 int ret = SUCCESS;
1793 u32 task_req = 0;
1794 struct scsi_lun fc_lun;
1795 struct fnic_stats *fnic_stats;
1796 struct abort_stats *abts_stats;
1797 struct terminate_stats *term_stats;
1798 enum fnic_ioreq_state old_ioreq_state;
1799 int mqtag;
1800 unsigned long abt_issued_time;
1801 uint16_t hwq = 0;
1802
1803 DECLARE_COMPLETION_ONSTACK(tm_done);
1804
1805 /* Wait for rport to unblock */
1806 fc_block_scsi_eh(sc);
1807
1808 /* Get local-port, check ready and link up */
1809 lp = shost_priv(sc->device->host);
1810
1811 fnic = lport_priv(lp);
1812
1813 spin_lock_irqsave(&fnic->fnic_lock, flags);
1814 fnic_stats = &fnic->fnic_stats;
1815 abts_stats = &fnic->fnic_stats.abts_stats;
1816 term_stats = &fnic->fnic_stats.term_stats;
1817
1818 rport = starget_to_rport(scsi_target(sc->device));
1819 mqtag = blk_mq_unique_tag(rq);
1820 hwq = blk_mq_unique_tag_to_hwq(mqtag);
1821
1822 fnic_priv(sc)->flags = FNIC_NO_FLAGS;
1823
1824 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1825 ret = FAILED;
1826 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1827 goto fnic_abort_cmd_end;
1828 }
1829
1830 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1831 /*
1832 * Avoid a race between SCSI issuing the abort and the device
1833 * completing the command.
1834 *
1835 * If the command is already completed by the fw cmpl code,
1836 * we just return SUCCESS from here. This means that the abort
1837 * succeeded. In the SCSI ML, since the timeout for command has
1838 * happened, the completion wont actually complete the command
1839 * and it will be considered as an aborted command
1840 *
1841 * .io_req will not be cleared except while holding io_req_lock.
1842 */
1843 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1844 io_req = fnic_priv(sc)->io_req;
1845 if (!io_req) {
1846 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1847 goto fnic_abort_cmd_end;
1848 }
1849
1850 io_req->abts_done = &tm_done;
1851
1852 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
1853 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1854 goto wait_pending;
1855 }
1856
1857 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1858 if (abt_issued_time <= 6000)
1859 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
1860 else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
1861 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
1862 else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
1863 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
1864 else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
1865 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
1866 else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
1867 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
1868 else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
1869 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
1870 else
1871 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
1872
1873 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
1874 "CDB Opcode: 0x%02x Abort issued time: %lu msec\n",
1875 sc->cmnd[0], abt_issued_time);
1876 /*
1877 * Command is still pending, need to abort it
1878 * If the firmware completes the command after this point,
1879 * the completion wont be done till mid-layer, since abort
1880 * has already started.
1881 */
1882 old_ioreq_state = fnic_priv(sc)->state;
1883 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
1884 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;
1885
1886 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1887
1888 /*
1889 * Check readiness of the remote port. If the path to remote
1890 * port is up, then send abts to the remote port to terminate
1891 * the IO. Else, just locally terminate the IO in the firmware
1892 */
1893 if (fc_remote_port_chkready(rport) == 0)
1894 task_req = FCPIO_ITMF_ABT_TASK;
1895 else {
1896 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1897 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1898 }
1899
1900 /* Now queue the abort command to firmware */
1901 int_to_scsilun(sc->device->lun, &fc_lun);
1902
1903 if (fnic_queue_abort_io_req(fnic, mqtag, task_req, fc_lun.scsi_lun,
1904 io_req, hwq)) {
1905 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1906 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)
1907 fnic_priv(sc)->state = old_ioreq_state;
1908 io_req = fnic_priv(sc)->io_req;
1909 if (io_req)
1910 io_req->abts_done = NULL;
1911 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1912 ret = FAILED;
1913 goto fnic_abort_cmd_end;
1914 }
1915 if (task_req == FCPIO_ITMF_ABT_TASK) {
1916 fnic_priv(sc)->flags |= FNIC_IO_ABTS_ISSUED;
1917 atomic64_inc(&fnic_stats->abts_stats.aborts);
1918 } else {
1919 fnic_priv(sc)->flags |= FNIC_IO_TERM_ISSUED;
1920 atomic64_inc(&fnic_stats->term_stats.terminates);
1921 }
1922
1923 /*
1924 * We queued an abort IO, wait for its completion.
1925 * Once the firmware completes the abort command, it will
1926 * wake up this thread.
1927 */
1928 wait_pending:
1929 wait_for_completion_timeout(&tm_done,
1930 msecs_to_jiffies
1931 (2 * fnic->config.ra_tov +
1932 fnic->config.ed_tov));
1933
1934 /* Check the abort status */
1935 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
1936
1937 io_req = fnic_priv(sc)->io_req;
1938 if (!io_req) {
1939 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1940 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1941 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
1942 ret = FAILED;
1943 goto fnic_abort_cmd_end;
1944 }
1945 io_req->abts_done = NULL;
1946
1947 /* fw did not complete abort, timed out */
1948 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) {
1949 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1950 if (task_req == FCPIO_ITMF_ABT_TASK) {
1951 atomic64_inc(&abts_stats->abort_drv_timeouts);
1952 } else {
1953 atomic64_inc(&term_stats->terminate_drv_timeouts);
1954 }
1955 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT;
1956 ret = FAILED;
1957 goto fnic_abort_cmd_end;
1958 }
1959
1960 /* IO out of order */
1961
1962 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1963 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1964 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
1965 "Issuing host reset due to out of order IO\n");
1966
1967 ret = FAILED;
1968 goto fnic_abort_cmd_end;
1969 }
1970
1971 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
1972
1973 start_time = io_req->start_time;
1974 /*
1975 * firmware completed the abort, check the status,
1976 * free the io_req if successful. If abort fails,
1977 * Device reset will clean the I/O.
1978 */
1979 if (fnic_priv(sc)->abts_status == FCPIO_SUCCESS ||
1980 (fnic_priv(sc)->abts_status == FCPIO_ABORTED)) {
1981 fnic_priv(sc)->io_req = NULL;
1982 io_req->sc = NULL;
1983 } else {
1984 ret = FAILED;
1985 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1986 goto fnic_abort_cmd_end;
1987 }
1988
1989 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = NULL;
1990 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
1991
1992 fnic_release_ioreq_buf(fnic, io_req, sc);
1993 mempool_free(io_req, fnic->io_req_pool);
1994
1995 /* Call SCSI completion function to complete the IO */
1996 sc->result = DID_ABORT << 16;
1997 scsi_done(sc);
1998 atomic64_dec(&fnic_stats->io_stats.active_ios);
1999 if (atomic64_read(&fnic->io_cmpl_skip))
2000 atomic64_dec(&fnic->io_cmpl_skip);
2001 else
2002 atomic64_inc(&fnic_stats->io_stats.io_completions);
2003
2004 fnic_abort_cmd_end:
2005 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, mqtag, sc,
2006 jiffies_to_msecs(jiffies - start_time),
2007 0, ((u64)sc->cmnd[0] << 32 |
2008 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2009 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2010 fnic_flags_and_state(sc));
2011
2012 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2013 "Returning from abort cmd type %x %s\n", task_req,
2014 (ret == SUCCESS) ?
2015 "SUCCESS" : "FAILED");
2016 return ret;
2017 }
2018
2019 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
2020 struct scsi_cmnd *sc,
2021 struct fnic_io_req *io_req)
2022 {
2023 struct vnic_wq_copy *wq;
2024 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
2025 struct scsi_lun fc_lun;
2026 int ret = 0;
2027 unsigned long flags;
2028 uint16_t hwq = 0;
2029 uint32_t tag = 0;
2030
2031 tag = io_req->tag;
2032 hwq = blk_mq_unique_tag_to_hwq(tag);
2033 wq = &fnic->hw_copy_wq[hwq];
2034
2035 spin_lock_irqsave(&fnic->fnic_lock, flags);
2036 if (unlikely(fnic_chk_state_flags_locked(fnic,
2037 FNIC_FLAGS_IO_BLOCKED))) {
2038 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2039 return FAILED;
2040 } else
2041 atomic_inc(&fnic->in_flight);
2042 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2043
2044 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2045
2046 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq])
2047 free_wq_copy_descs(fnic, wq, hwq);
2048
2049 if (!vnic_wq_copy_desc_avail(wq)) {
2050 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2051 "queue_dr_io_req failure - no descriptors\n");
2052 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
2053 ret = -EAGAIN;
2054 goto lr_io_req_end;
2055 }
2056
2057 /* fill in the lun info */
2058 int_to_scsilun(sc->device->lun, &fc_lun);
2059
2060 tag |= FNIC_TAG_DEV_RST;
2061 fnic_queue_wq_copy_desc_itmf(wq, tag,
2062 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
2063 fc_lun.scsi_lun, io_req->port_id,
2064 fnic->config.ra_tov, fnic->config.ed_tov);
2065
2066 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
2067 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
2068 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
2069 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
2070 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
2071
2072 lr_io_req_end:
2073 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2074 atomic_dec(&fnic->in_flight);
2075
2076 return ret;
2077 }
2078
2079 struct fnic_pending_aborts_iter_data {
2080 struct fnic *fnic;
2081 struct scsi_cmnd *lr_sc;
2082 struct scsi_device *lun_dev;
2083 int ret;
2084 };
2085
2086 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, void *data)
2087 {
2088 struct request *const rq = scsi_cmd_to_rq(sc);
2089 struct fnic_pending_aborts_iter_data *iter_data = data;
2090 struct fnic *fnic = iter_data->fnic;
2091 struct scsi_device *lun_dev = iter_data->lun_dev;
2092 unsigned long abt_tag = 0;
2093 uint16_t hwq = 0;
2094 struct fnic_io_req *io_req;
2095 unsigned long flags;
2096 struct scsi_lun fc_lun;
2097 DECLARE_COMPLETION_ONSTACK(tm_done);
2098 enum fnic_ioreq_state old_ioreq_state;
2099
2100 if (sc == iter_data->lr_sc || sc->device != lun_dev)
2101 return true;
2102
2103 abt_tag = blk_mq_unique_tag(rq);
2104 hwq = blk_mq_unique_tag_to_hwq(abt_tag);
2105
2106 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2107 io_req = fnic_priv(sc)->io_req;
2108 if (!io_req) {
2109 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2110 return true;
2111 }
2112
2113 /*
2114 * Found IO that is still pending with firmware and
2115 * belongs to the LUN that we are resetting
2116 */
2117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2118 "Found IO in %s on lun\n",
2119 fnic_ioreq_state_to_str(fnic_priv(sc)->state));
2120
2121 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {
2122 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2123 return true;
2124 }
2125 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&
2126 (!(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED))) {
2127 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
2128 "dev rst not pending sc 0x%p\n", sc);
2129 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2130 return true;
2131 }
2132
2133 if (io_req->abts_done)
2134 shost_printk(KERN_ERR, fnic->lport->host,
2135 "%s: io_req->abts_done is set state is %s\n",
2136 __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state));
2137 old_ioreq_state = fnic_priv(sc)->state;
2138 /*
2139 * Any pending IO issued prior to reset is expected to be
2140 * in abts pending state, if not we need to set
2141 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2142 * When IO is completed, the IO will be handed over and
2143 * handled in this function.
2144 */
2145 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
2146
2147 BUG_ON(io_req->abts_done);
2148
2149 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {
2150 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
2151 "dev rst sc 0x%p\n", sc);
2152 }
2153
2154 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;
2155 io_req->abts_done = &tm_done;
2156 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2157
2158 /* Now queue the abort command to firmware */
2159 int_to_scsilun(sc->device->lun, &fc_lun);
2160
2161 if (fnic_queue_abort_io_req(fnic, abt_tag,
2162 FCPIO_ITMF_ABT_TASK_TERM,
2163 fc_lun.scsi_lun, io_req, hwq)) {
2164 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2165 io_req = fnic_priv(sc)->io_req;
2166 if (io_req)
2167 io_req->abts_done = NULL;
2168 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)
2169 fnic_priv(sc)->state = old_ioreq_state;
2170 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2171 iter_data->ret = FAILED;
2172 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
2173 "hwq: %d abt_tag: 0x%lx Abort could not be queued\n",
2174 hwq, abt_tag);
2175 return false;
2176 } else {
2177 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2178 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET)
2179 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
2180 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2181 }
2182 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;
2183
2184 wait_for_completion_timeout(&tm_done, msecs_to_jiffies
2185 (fnic->config.ed_tov));
2186
2187 /* Recheck cmd state to check if it is now aborted */
2188 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2189 io_req = fnic_priv(sc)->io_req;
2190 if (!io_req) {
2191 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2192 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
2193 return true;
2194 }
2195
2196 io_req->abts_done = NULL;
2197
2198 /* if abort is still pending with fw, fail */
2199 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) {
2200 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2201 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE;
2202 iter_data->ret = FAILED;
2203 return false;
2204 }
2205 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
2206
2207 /* original sc used for lr is handled by dev reset code */
2208 if (sc != iter_data->lr_sc) {
2209 fnic_priv(sc)->io_req = NULL;
2210 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(abt_tag)] = NULL;
2211 }
2212 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2213
2214 /* original sc used for lr is handled by dev reset code */
2215 if (sc != iter_data->lr_sc) {
2216 fnic_release_ioreq_buf(fnic, io_req, sc);
2217 mempool_free(io_req, fnic->io_req_pool);
2218 }
2219
2220 /*
2221 * Any IO is returned during reset, it needs to call scsi_done
2222 * to return the scsi_cmnd to upper layer.
2223 */
2224 /* Set result to let upper SCSI layer retry */
2225 sc->result = DID_RESET << 16;
2226 scsi_done(sc);
2227
2228 return true;
2229 }
2230
2231 /*
2232 * Clean up any pending aborts on the lun
2233 * For each outstanding IO on this lun, whose abort is not completed by fw,
2234 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2235 * successfully aborted, 1 otherwise
2236 */
2237 static int fnic_clean_pending_aborts(struct fnic *fnic,
2238 struct scsi_cmnd *lr_sc,
2239 bool new_sc)
2240
2241 {
2242 int ret = 0;
2243 struct fnic_pending_aborts_iter_data iter_data = {
2244 .fnic = fnic,
2245 .lun_dev = lr_sc->device,
2246 .ret = SUCCESS,
2247 };
2248
2249 iter_data.lr_sc = lr_sc;
2250
2251 scsi_host_busy_iter(fnic->lport->host,
2252 fnic_pending_aborts_iter, &iter_data);
2253 if (iter_data.ret == FAILED) {
2254 ret = iter_data.ret;
2255 goto clean_pending_aborts_end;
2256 }
2257 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2258
2259 /* walk again to check, if IOs are still pending in fw */
2260 if (fnic_is_abts_pending(fnic, lr_sc))
2261 ret = 1;
2262
2263 clean_pending_aborts_end:
2264 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
2265 "exit status: %d\n", ret);
2266 return ret;
2267 }
2268
2269 /*
2270 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2271 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2272 * on the LUN.
2273 */
2274 int fnic_device_reset(struct scsi_cmnd *sc)
2275 {
2276 struct request *rq = scsi_cmd_to_rq(sc);
2277 struct fc_lport *lp;
2278 struct fnic *fnic;
2279 struct fnic_io_req *io_req = NULL;
2280 struct fc_rport *rport;
2281 int status;
2282 int ret = FAILED;
2283 unsigned long flags;
2284 unsigned long start_time = 0;
2285 struct scsi_lun fc_lun;
2286 struct fnic_stats *fnic_stats;
2287 struct reset_stats *reset_stats;
2288 int mqtag = rq->tag;
2289 DECLARE_COMPLETION_ONSTACK(tm_done);
2290 bool new_sc = 0;
2291 uint16_t hwq = 0;
2292
2293 /* Wait for rport to unblock */
2294 fc_block_scsi_eh(sc);
2295
2296 /* Get local-port, check ready and link up */
2297 lp = shost_priv(sc->device->host);
2298
2299 fnic = lport_priv(lp);
2300 fnic_stats = &fnic->fnic_stats;
2301 reset_stats = &fnic->fnic_stats.reset_stats;
2302
2303 atomic64_inc(&reset_stats->device_resets);
2304
2305 rport = starget_to_rport(scsi_target(sc->device));
2306 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2307 "fcid: 0x%x lun: 0x%llx hwq: %d mqtag: 0x%x flags: 0x%x Device reset\n",
2308 rport->port_id, sc->device->lun, hwq, mqtag,
2309 fnic_priv(sc)->flags);
2310
2311 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2312 goto fnic_device_reset_end;
2313
2314 /* Check if remote port up */
2315 if (fc_remote_port_chkready(rport)) {
2316 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2317 goto fnic_device_reset_end;
2318 }
2319
2320 fnic_priv(sc)->flags = FNIC_DEVICE_RESET;
2321
2322 if (unlikely(mqtag < 0)) {
2323 /*
2324 * For device reset issued through sg3utils, we let
2325 * only one LUN_RESET to go through and use a special
2326 * tag equal to max_tag_id so that we don't have to allocate
2327 * or free it. It won't interact with tags
2328 * allocated by mid layer.
2329 */
2330 mutex_lock(&fnic->sgreset_mutex);
2331 mqtag = fnic->fnic_max_tag_id;
2332 new_sc = 1;
2333 } else {
2334 mqtag = blk_mq_unique_tag(rq);
2335 hwq = blk_mq_unique_tag_to_hwq(mqtag);
2336 }
2337
2338 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2339 io_req = fnic_priv(sc)->io_req;
2340
2341 /*
2342 * If there is a io_req attached to this command, then use it,
2343 * else allocate a new one.
2344 */
2345 if (!io_req) {
2346 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2347 if (!io_req) {
2348 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2349 goto fnic_device_reset_end;
2350 }
2351 memset(io_req, 0, sizeof(*io_req));
2352 io_req->port_id = rport->port_id;
2353 io_req->tag = mqtag;
2354 fnic_priv(sc)->io_req = io_req;
2355 io_req->sc = sc;
2356
2357 if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL)
2358 WARN(1, "fnic<%d>: %s: tag 0x%x already exists\n",
2359 fnic->fnic_num, __func__, blk_mq_unique_tag_to_tag(mqtag));
2360
2361 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] =
2362 io_req;
2363 }
2364 io_req->dr_done = &tm_done;
2365 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING;
2366 fnic_priv(sc)->lr_status = FCPIO_INVALID_CODE;
2367 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2368
2369 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, "TAG %x\n", mqtag);
2370
2371 /*
2372 * issue the device reset, if enqueue failed, clean up the ioreq
2373 * and break assoc with scsi cmd
2374 */
2375 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2376 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2377 io_req = fnic_priv(sc)->io_req;
2378 if (io_req)
2379 io_req->dr_done = NULL;
2380 goto fnic_device_reset_clean;
2381 }
2382 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2383 fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED;
2384 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2385
2386 /*
2387 * Wait on the local completion for LUN reset. The io_req may be
2388 * freed while we wait since we hold no lock.
2389 */
2390 wait_for_completion_timeout(&tm_done,
2391 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2392
2393 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2394 io_req = fnic_priv(sc)->io_req;
2395 if (!io_req) {
2396 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2397 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2398 "io_req is null mqtag 0x%x sc 0x%p\n", mqtag, sc);
2399 goto fnic_device_reset_end;
2400 }
2401 io_req->dr_done = NULL;
2402
2403 status = fnic_priv(sc)->lr_status;
2404
2405 /*
2406 * If lun reset not completed, bail out with failed. io_req
2407 * gets cleaned up during higher levels of EH
2408 */
2409 if (status == FCPIO_INVALID_CODE) {
2410 atomic64_inc(&reset_stats->device_reset_timeouts);
2411 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2412 "Device reset timed out\n");
2413 fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT;
2414 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2415 int_to_scsilun(sc->device->lun, &fc_lun);
2416 /*
2417 * Issue abort and terminate on device reset request.
2418 * If q'ing of terminate fails, retry it after a delay.
2419 */
2420 while (1) {
2421 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2422 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) {
2423 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2424 break;
2425 }
2426 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2427 if (fnic_queue_abort_io_req(fnic,
2428 mqtag | FNIC_TAG_DEV_RST,
2429 FCPIO_ITMF_ABT_TASK_TERM,
2430 fc_lun.scsi_lun, io_req, hwq)) {
2431 wait_for_completion_timeout(&tm_done,
2432 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2433 } else {
2434 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2435 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
2436 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;
2437 io_req->abts_done = &tm_done;
2438 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2439 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2440 "Abort and terminate issued on Device reset mqtag 0x%x sc 0x%p\n",
2441 mqtag, sc);
2442 break;
2443 }
2444 }
2445 while (1) {
2446 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2447 if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) {
2448 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2449 wait_for_completion_timeout(&tm_done,
2450 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2451 break;
2452 } else {
2453 io_req = fnic_priv(sc)->io_req;
2454 io_req->abts_done = NULL;
2455 goto fnic_device_reset_clean;
2456 }
2457 }
2458 } else {
2459 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2460 }
2461
2462 /* Completed, but not successful, clean up the io_req, return fail */
2463 if (status != FCPIO_SUCCESS) {
2464 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2465 FNIC_SCSI_DBG(KERN_DEBUG,
2466 fnic->lport->host, fnic->fnic_num,
2467 "Device reset completed - failed\n");
2468 io_req = fnic_priv(sc)->io_req;
2469 goto fnic_device_reset_clean;
2470 }
2471
2472 /*
2473 * Clean up any aborts on this lun that have still not
2474 * completed. If any of these fail, then LUN reset fails.
2475 * clean_pending_aborts cleans all cmds on this lun except
2476 * the lun reset cmd. If all cmds get cleaned, the lun reset
2477 * succeeds
2478 */
2479 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
2480 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2481 io_req = fnic_priv(sc)->io_req;
2482 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2483 "Device reset failed"
2484 " since could not abort all IOs\n");
2485 goto fnic_device_reset_clean;
2486 }
2487
2488 /* Clean lun reset command */
2489 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2490 io_req = fnic_priv(sc)->io_req;
2491 if (io_req)
2492 /* Completed, and successful */
2493 ret = SUCCESS;
2494
2495 fnic_device_reset_clean:
2496 if (io_req) {
2497 fnic_priv(sc)->io_req = NULL;
2498 io_req->sc = NULL;
2499 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(io_req->tag)] = NULL;
2500 }
2501
2502 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2503
2504 if (io_req) {
2505 start_time = io_req->start_time;
2506 fnic_release_ioreq_buf(fnic, io_req, sc);
2507 mempool_free(io_req, fnic->io_req_pool);
2508 }
2509
2510 fnic_device_reset_end:
2511 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc,
2512 jiffies_to_msecs(jiffies - start_time),
2513 0, ((u64)sc->cmnd[0] << 32 |
2514 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2515 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2516 fnic_flags_and_state(sc));
2517
2518 if (new_sc) {
2519 fnic->sgreset_sc = NULL;
2520 mutex_unlock(&fnic->sgreset_mutex);
2521 }
2522
2523 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2524 "Returning from device reset %s\n",
2525 (ret == SUCCESS) ?
2526 "SUCCESS" : "FAILED");
2527
2528 if (ret == FAILED)
2529 atomic64_inc(&reset_stats->device_reset_failures);
2530
2531 return ret;
2532 }
2533
2534 /* Clean up all IOs, clean up libFC local port */
2535 int fnic_reset(struct Scsi_Host *shost)
2536 {
2537 struct fc_lport *lp;
2538 struct fnic *fnic;
2539 int ret = 0;
2540 struct reset_stats *reset_stats;
2541
2542 lp = shost_priv(shost);
2543 fnic = lport_priv(lp);
2544 reset_stats = &fnic->fnic_stats.reset_stats;
2545
2546 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
2547 "Issuing fnic reset\n");
2548
2549 atomic64_inc(&reset_stats->fnic_resets);
2550
2551 /*
2552 * Reset local port, this will clean up libFC exchanges,
2553 * reset remote port sessions, and if link is up, begin flogi
2554 */
2555 ret = fc_lport_reset(lp);
2556
2557 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
2558 "Returning from fnic reset with: %s\n",
2559 (ret == 0) ? "SUCCESS" : "FAILED");
2560
2561 if (ret == 0)
2562 atomic64_inc(&reset_stats->fnic_reset_completions);
2563 else
2564 atomic64_inc(&reset_stats->fnic_reset_failures);
2565
2566 return ret;
2567 }
2568
2569 /*
2570 * SCSI Error handling calls driver's eh_host_reset if all prior
2571 * error handling levels return FAILED. If host reset completes
2572 * successfully, and if link is up, then Fabric login begins.
2573 *
2574 * Host Reset is the highest level of error recovery. If this fails, then
2575 * host is offlined by SCSI.
2576 *
2577 */
2578 int fnic_host_reset(struct scsi_cmnd *sc)
2579 {
2580 int ret;
2581 unsigned long wait_host_tmo;
2582 struct Scsi_Host *shost = sc->device->host;
2583 struct fc_lport *lp = shost_priv(shost);
2584 struct fnic *fnic = lport_priv(lp);
2585 unsigned long flags;
2586
2587 spin_lock_irqsave(&fnic->fnic_lock, flags);
2588 if (!fnic->internal_reset_inprogress) {
2589 fnic->internal_reset_inprogress = true;
2590 } else {
2591 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2592 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2593 "host reset in progress skipping another host reset\n");
2594 return SUCCESS;
2595 }
2596 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2597
2598 /*
2599 * If fnic_reset is successful, wait for fabric login to complete
2600 * scsi-ml tries to send a TUR to every device if host reset is
2601 * successful, so before returning to scsi, fabric should be up
2602 */
2603 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2604 if (ret == SUCCESS) {
2605 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2606 ret = FAILED;
2607 while (time_before(jiffies, wait_host_tmo)) {
2608 if ((lp->state == LPORT_ST_READY) &&
2609 (lp->link_up)) {
2610 ret = SUCCESS;
2611 break;
2612 }
2613 ssleep(1);
2614 }
2615 }
2616
2617 spin_lock_irqsave(&fnic->fnic_lock, flags);
2618 fnic->internal_reset_inprogress = false;
2619 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2620 return ret;
2621 }
2622
2623 /*
2624 * This fxn is called from libFC when host is removed
2625 */
2626 void fnic_scsi_abort_io(struct fc_lport *lp)
2627 {
2628 int err = 0;
2629 unsigned long flags;
2630 enum fnic_state old_state;
2631 struct fnic *fnic = lport_priv(lp);
2632 DECLARE_COMPLETION_ONSTACK(remove_wait);
2633
2634 /* Issue firmware reset for fnic, wait for reset to complete */
2635 retry_fw_reset:
2636 spin_lock_irqsave(&fnic->fnic_lock, flags);
2637 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) &&
2638 fnic->link_events) {
2639 /* fw reset is in progress, poll for its completion */
2640 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2641 schedule_timeout(msecs_to_jiffies(100));
2642 goto retry_fw_reset;
2643 }
2644
2645 fnic->remove_wait = &remove_wait;
2646 old_state = fnic->state;
2647 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2648 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2649 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2650
2651 err = fnic_fw_reset_handler(fnic);
2652 if (err) {
2653 spin_lock_irqsave(&fnic->fnic_lock, flags);
2654 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2655 fnic->state = old_state;
2656 fnic->remove_wait = NULL;
2657 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2658 return;
2659 }
2660
2661 /* Wait for firmware reset to complete */
2662 wait_for_completion_timeout(&remove_wait,
2663 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2664
2665 spin_lock_irqsave(&fnic->fnic_lock, flags);
2666 fnic->remove_wait = NULL;
2667 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
2668 "fnic_scsi_abort_io %s\n",
2669 (fnic->state == FNIC_IN_ETH_MODE) ?
2670 "SUCCESS" : "FAILED");
2671 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2672
2673 }
2674
2675 /*
2676 * This fxn called from libFC to clean up driver IO state on link down
2677 */
2678 void fnic_scsi_cleanup(struct fc_lport *lp)
2679 {
2680 unsigned long flags;
2681 enum fnic_state old_state;
2682 struct fnic *fnic = lport_priv(lp);
2683
2684 /* issue fw reset */
2685 retry_fw_reset:
2686 spin_lock_irqsave(&fnic->fnic_lock, flags);
2687 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2688 /* fw reset is in progress, poll for its completion */
2689 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2690 schedule_timeout(msecs_to_jiffies(100));
2691 goto retry_fw_reset;
2692 }
2693 old_state = fnic->state;
2694 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2695 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2696 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2697
2698 if (fnic_fw_reset_handler(fnic)) {
2699 spin_lock_irqsave(&fnic->fnic_lock, flags);
2700 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2701 fnic->state = old_state;
2702 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2703 }
2704
2705 }
2706
2707 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2708 {
2709 }
2710
2711 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2712 {
2713 struct fnic *fnic = lport_priv(lp);
2714
2715 /* Non-zero sid, nothing to do */
2716 if (sid)
2717 goto call_fc_exch_mgr_reset;
2718
2719 if (did) {
2720 fnic_rport_exch_reset(fnic, did);
2721 goto call_fc_exch_mgr_reset;
2722 }
2723
2724 /*
2725 * sid = 0, did = 0
2726 * link down or device being removed
2727 */
2728 if (!fnic->in_remove)
2729 fnic_scsi_cleanup(lp);
2730 else
2731 fnic_scsi_abort_io(lp);
2732
2733 /* call libFC exch mgr reset to reset its exchanges */
2734 call_fc_exch_mgr_reset:
2735 fc_exch_mgr_reset(lp, sid, did);
2736
2737 }
2738
2739 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data)
2740 {
2741 struct request *const rq = scsi_cmd_to_rq(sc);
2742 struct fnic_pending_aborts_iter_data *iter_data = data;
2743 struct fnic *fnic = iter_data->fnic;
2744 int cmd_state;
2745 struct fnic_io_req *io_req;
2746 unsigned long flags;
2747 uint16_t hwq = 0;
2748 int tag;
2749
2750 tag = blk_mq_unique_tag(rq);
2751 hwq = blk_mq_unique_tag_to_hwq(tag);
2752
2753 /*
2754 * ignore this lun reset cmd or cmds that do not belong to
2755 * this lun
2756 */
2757 if (iter_data->lr_sc && sc == iter_data->lr_sc)
2758 return true;
2759 if (iter_data->lun_dev && sc->device != iter_data->lun_dev)
2760 return true;
2761
2762 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);
2763
2764 io_req = fnic_priv(sc)->io_req;
2765 if (!io_req) {
2766 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2767 return true;
2768 }
2769
2770 /*
2771 * Found IO that is still pending with firmware and
2772 * belongs to the LUN that we are resetting
2773 */
2774 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
2775 "hwq: %d tag: 0x%x Found IO in state: %s on lun\n",
2776 hwq, tag,
2777 fnic_ioreq_state_to_str(fnic_priv(sc)->state));
2778 cmd_state = fnic_priv(sc)->state;
2779 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);
2780 if (cmd_state == FNIC_IOREQ_ABTS_PENDING)
2781 iter_data->ret = 1;
2782
2783 return iter_data->ret ? false : true;
2784 }
2785
2786 /*
2787 * fnic_is_abts_pending() is a helper function that
2788 * walks through tag map to check if there is any IOs pending,if there is one,
2789 * then it returns 1 (true), otherwise 0 (false)
2790 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2791 * otherwise, it checks for all IOs.
2792 */
2793 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2794 {
2795 struct fnic_pending_aborts_iter_data iter_data = {
2796 .fnic = fnic,
2797 .lun_dev = NULL,
2798 .ret = 0,
2799 };
2800
2801 if (lr_sc) {
2802 iter_data.lun_dev = lr_sc->device;
2803 iter_data.lr_sc = lr_sc;
2804 }
2805
2806 /* walk again to check, if IOs are still pending in fw */
2807 scsi_host_busy_iter(fnic->lport->host,
2808 fnic_abts_pending_iter, &iter_data);
2809
2810 return iter_data.ret;
2811 }
Kernel DRM miscellaneous fixes and cross-tree changes