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