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thermal/drivers/hisi: Set the thermal zone private data to the sensor pointer
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_scsi.c
blob8cbd3c9f0b4cb9ca199736d838a435fc8490b1cf
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/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/delay.h>
29 #include <linux/gfp.h>
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/fc/fc_els.h>
36 #include <scsi/fc/fc_fcoe.h>
37 #include <scsi/libfc.h>
38 #include <scsi/fc_frame.h>
39 #include "fnic_io.h"
40 #include "fnic.h"
41
42 const char *fnic_state_str[] = {
43 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
44 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
45 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
46 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
47 };
48
49 static const char *fnic_ioreq_state_str[] = {
50 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
51 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
52 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
53 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
54 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
55 };
56
57 static const char *fcpio_status_str[] = {
58 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
59 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
60 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
61 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
62 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
63 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
64 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
65 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
66 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
67 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
68 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
69 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
70 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
71 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
72 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
73 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
74 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
75 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
76 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
77 };
78
79 const char *fnic_state_to_str(unsigned int state)
80 {
81 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
82 return "unknown";
83
84 return fnic_state_str[state];
85 }
86
87 static const char *fnic_ioreq_state_to_str(unsigned int state)
88 {
89 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
90 !fnic_ioreq_state_str[state])
91 return "unknown";
92
93 return fnic_ioreq_state_str[state];
94 }
95
96 static const char *fnic_fcpio_status_to_str(unsigned int status)
97 {
98 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
99 return "unknown";
100
101 return fcpio_status_str[status];
102 }
103
104 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
105
106 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
107 struct scsi_cmnd *sc)
108 {
109 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
110
111 return &fnic->io_req_lock[hash];
112 }
113
114 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
115 int tag)
116 {
117 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
118 }
119
120 /*
121 * Unmap the data buffer and sense buffer for an io_req,
122 * also unmap and free the device-private scatter/gather list.
123 */
124 static void fnic_release_ioreq_buf(struct fnic *fnic,
125 struct fnic_io_req *io_req,
126 struct scsi_cmnd *sc)
127 {
128 if (io_req->sgl_list_pa)
129 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
131 PCI_DMA_TODEVICE);
132 scsi_dma_unmap(sc);
133
134 if (io_req->sgl_cnt)
135 mempool_free(io_req->sgl_list_alloc,
136 fnic->io_sgl_pool[io_req->sgl_type]);
137 if (io_req->sense_buf_pa)
138 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
139 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
140 }
141
142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
143 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
144 {
145 /* if no Ack received from firmware, then nothing to clean */
146 if (!fnic->fw_ack_recd[0])
147 return 1;
148
149 /*
150 * Update desc_available count based on number of freed descriptors
151 * Account for wraparound
152 */
153 if (wq->to_clean_index <= fnic->fw_ack_index[0])
154 wq->ring.desc_avail += (fnic->fw_ack_index[0]
155 - wq->to_clean_index + 1);
156 else
157 wq->ring.desc_avail += (wq->ring.desc_count
158 - wq->to_clean_index
159 + fnic->fw_ack_index[0] + 1);
160
161 /*
162 * just bump clean index to ack_index+1 accounting for wraparound
163 * this will essentially free up all descriptors between
164 * to_clean_index and fw_ack_index, both inclusive
165 */
166 wq->to_clean_index =
167 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
168
169 /* we have processed the acks received so far */
170 fnic->fw_ack_recd[0] = 0;
171 return 0;
172 }
173
174
175 /**
176 * __fnic_set_state_flags
177 * Sets/Clears bits in fnic's state_flags
178 **/
179 void
180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
181 unsigned long clearbits)
182 {
183 struct Scsi_Host *host = fnic->lport->host;
184 int sh_locked = spin_is_locked(host->host_lock);
185 unsigned long flags = 0;
186
187 if (!sh_locked)
188 spin_lock_irqsave(host->host_lock, flags);
189
190 if (clearbits)
191 fnic->state_flags &= ~st_flags;
192 else
193 fnic->state_flags |= st_flags;
194
195 if (!sh_locked)
196 spin_unlock_irqrestore(host->host_lock, flags);
197
198 return;
199 }
200
201
202 /*
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
205 */
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 */
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 memset(gw_mac, 0xff, ETH_ALEN);
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 */
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 int r;
334
335 if (sg_count) {
336 /* For each SGE, create a device desc entry */
337 desc = io_req->sgl_list;
338 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
339 desc->addr = cpu_to_le64(sg_dma_address(sg));
340 desc->len = cpu_to_le32(sg_dma_len(sg));
341 desc->_resvd = 0;
342 desc++;
343 }
344
345 io_req->sgl_list_pa = pci_map_single
346 (fnic->pdev,
347 io_req->sgl_list,
348 sizeof(io_req->sgl_list[0]) * sg_count,
349 PCI_DMA_TODEVICE);
350
351 r = pci_dma_mapping_error(fnic->pdev, io_req->sgl_list_pa);
352 if (r) {
353 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
354 return SCSI_MLQUEUE_HOST_BUSY;
355 }
356 }
357
358 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
359 sc->sense_buffer,
360 SCSI_SENSE_BUFFERSIZE,
361 PCI_DMA_FROMDEVICE);
362
363 r = pci_dma_mapping_error(fnic->pdev, io_req->sense_buf_pa);
364 if (r) {
365 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
366 sizeof(io_req->sgl_list[0]) * sg_count,
367 PCI_DMA_TODEVICE);
368 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
369 return SCSI_MLQUEUE_HOST_BUSY;
370 }
371
372 int_to_scsilun(sc->device->lun, &fc_lun);
373
374 /* Enqueue the descriptor in the Copy WQ */
375 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
376
377 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
378 free_wq_copy_descs(fnic, wq);
379
380 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
381 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
382 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
383 "fnic_queue_wq_copy_desc failure - no descriptors\n");
384 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
385 return SCSI_MLQUEUE_HOST_BUSY;
386 }
387
388 flags = 0;
389 if (sc->sc_data_direction == DMA_FROM_DEVICE)
390 flags = FCPIO_ICMND_RDDATA;
391 else if (sc->sc_data_direction == DMA_TO_DEVICE)
392 flags = FCPIO_ICMND_WRDATA;
393
394 exch_flags = 0;
395 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
396 (rp->flags & FC_RP_FLAGS_RETRY))
397 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
398
399 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
400 0, exch_flags, io_req->sgl_cnt,
401 SCSI_SENSE_BUFFERSIZE,
402 io_req->sgl_list_pa,
403 io_req->sense_buf_pa,
404 0, /* scsi cmd ref, always 0 */
405 FCPIO_ICMND_PTA_SIMPLE,
406 /* scsi pri and tag */
407 flags, /* command flags */
408 sc->cmnd, sc->cmd_len,
409 scsi_bufflen(sc),
410 fc_lun.scsi_lun, io_req->port_id,
411 rport->maxframe_size, rp->r_a_tov,
412 rp->e_d_tov);
413
414 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
415 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
416 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
417 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
418 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
419
420 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
421 return 0;
422 }
423
424 /*
425 * fnic_queuecommand
426 * Routine to send a scsi cdb
427 * Called with host_lock held and interrupts disabled.
428 */
429 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
430 {
431 struct fc_lport *lp = shost_priv(sc->device->host);
432 struct fc_rport *rport;
433 struct fnic_io_req *io_req = NULL;
434 struct fnic *fnic = lport_priv(lp);
435 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
436 struct vnic_wq_copy *wq;
437 int ret;
438 u64 cmd_trace;
439 int sg_count = 0;
440 unsigned long flags = 0;
441 unsigned long ptr;
442 spinlock_t *io_lock = NULL;
443 int io_lock_acquired = 0;
444 struct fc_rport_libfc_priv *rp;
445
446 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
447 return SCSI_MLQUEUE_HOST_BUSY;
448
449 rport = starget_to_rport(scsi_target(sc->device));
450 if (!rport) {
451 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
452 "returning DID_NO_CONNECT for IO as rport is NULL\n");
453 sc->result = DID_NO_CONNECT << 16;
454 done(sc);
455 return 0;
456 }
457
458 ret = fc_remote_port_chkready(rport);
459 if (ret) {
460 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
461 "rport is not ready\n");
462 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
463 sc->result = ret;
464 done(sc);
465 return 0;
466 }
467
468 rp = rport->dd_data;
469 if (!rp || rp->rp_state == RPORT_ST_DELETE) {
470 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
471 "rport 0x%x removed, returning DID_NO_CONNECT\n",
472 rport->port_id);
473
474 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
475 sc->result = DID_NO_CONNECT<<16;
476 done(sc);
477 return 0;
478 }
479
480 if (rp->rp_state != RPORT_ST_READY) {
481 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
482 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
483 rport->port_id, rp->rp_state);
484
485 sc->result = DID_IMM_RETRY << 16;
486 done(sc);
487 return 0;
488 }
489
490 if (lp->state != LPORT_ST_READY || !(lp->link_up))
491 return SCSI_MLQUEUE_HOST_BUSY;
492
493 atomic_inc(&fnic->in_flight);
494
495 /*
496 * Release host lock, use driver resource specific locks from here.
497 * Don't re-enable interrupts in case they were disabled prior to the
498 * caller disabling them.
499 */
500 spin_unlock(lp->host->host_lock);
501 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
502 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
503
504 /* Get a new io_req for this SCSI IO */
505 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
506 if (!io_req) {
507 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
508 ret = SCSI_MLQUEUE_HOST_BUSY;
509 goto out;
510 }
511 memset(io_req, 0, sizeof(*io_req));
512
513 /* Map the data buffer */
514 sg_count = scsi_dma_map(sc);
515 if (sg_count < 0) {
516 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
517 sc->request->tag, sc, 0, sc->cmnd[0],
518 sg_count, CMD_STATE(sc));
519 mempool_free(io_req, fnic->io_req_pool);
520 goto out;
521 }
522
523 /* Determine the type of scatter/gather list we need */
524 io_req->sgl_cnt = sg_count;
525 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
526 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
527 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
528
529 if (sg_count) {
530 io_req->sgl_list =
531 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
532 GFP_ATOMIC);
533 if (!io_req->sgl_list) {
534 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
535 ret = SCSI_MLQUEUE_HOST_BUSY;
536 scsi_dma_unmap(sc);
537 mempool_free(io_req, fnic->io_req_pool);
538 goto out;
539 }
540
541 /* Cache sgl list allocated address before alignment */
542 io_req->sgl_list_alloc = io_req->sgl_list;
543 ptr = (unsigned long) io_req->sgl_list;
544 if (ptr % FNIC_SG_DESC_ALIGN) {
545 io_req->sgl_list = (struct host_sg_desc *)
546 (((unsigned long) ptr
547 + FNIC_SG_DESC_ALIGN - 1)
548 & ~(FNIC_SG_DESC_ALIGN - 1));
549 }
550 }
551
552 /*
553 * Will acquire lock defore setting to IO initialized.
554 */
555
556 io_lock = fnic_io_lock_hash(fnic, sc);
557 spin_lock_irqsave(io_lock, flags);
558
559 /* initialize rest of io_req */
560 io_lock_acquired = 1;
561 io_req->port_id = rport->port_id;
562 io_req->start_time = jiffies;
563 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
564 CMD_SP(sc) = (char *)io_req;
565 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
566 sc->scsi_done = done;
567
568 /* create copy wq desc and enqueue it */
569 wq = &fnic->wq_copy[0];
570 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
571 if (ret) {
572 /*
573 * In case another thread cancelled the request,
574 * refetch the pointer under the lock.
575 */
576 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
577 sc->request->tag, sc, 0, 0, 0,
578 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
579 io_req = (struct fnic_io_req *)CMD_SP(sc);
580 CMD_SP(sc) = NULL;
581 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
582 spin_unlock_irqrestore(io_lock, flags);
583 if (io_req) {
584 fnic_release_ioreq_buf(fnic, io_req, sc);
585 mempool_free(io_req, fnic->io_req_pool);
586 }
587 atomic_dec(&fnic->in_flight);
588 /* acquire host lock before returning to SCSI */
589 spin_lock(lp->host->host_lock);
590 return ret;
591 } else {
592 atomic64_inc(&fnic_stats->io_stats.active_ios);
593 atomic64_inc(&fnic_stats->io_stats.num_ios);
594 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
595 atomic64_read(&fnic_stats->io_stats.max_active_ios))
596 atomic64_set(&fnic_stats->io_stats.max_active_ios,
597 atomic64_read(&fnic_stats->io_stats.active_ios));
598
599 /* REVISIT: Use per IO lock in the final code */
600 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
601 }
602 out:
603 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
604 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
605 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
606 sc->cmnd[5]);
607
608 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
609 sc->request->tag, sc, io_req,
610 sg_count, cmd_trace,
611 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
612
613 /* if only we issued IO, will we have the io lock */
614 if (io_lock_acquired)
615 spin_unlock_irqrestore(io_lock, flags);
616
617 atomic_dec(&fnic->in_flight);
618 /* acquire host lock before returning to SCSI */
619 spin_lock(lp->host->host_lock);
620 return ret;
621 }
622
623 DEF_SCSI_QCMD(fnic_queuecommand)
624
625 /*
626 * fnic_fcpio_fw_reset_cmpl_handler
627 * Routine to handle fw reset completion
628 */
629 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
630 struct fcpio_fw_req *desc)
631 {
632 u8 type;
633 u8 hdr_status;
634 struct fcpio_tag tag;
635 int ret = 0;
636 unsigned long flags;
637 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
638
639 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
640
641 atomic64_inc(&reset_stats->fw_reset_completions);
642
643 /* Clean up all outstanding io requests */
644 fnic_cleanup_io(fnic, SCSI_NO_TAG);
645
646 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
647 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
648 atomic64_set(&fnic->io_cmpl_skip, 0);
649
650 spin_lock_irqsave(&fnic->fnic_lock, flags);
651
652 /* fnic should be in FC_TRANS_ETH_MODE */
653 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
654 /* Check status of reset completion */
655 if (!hdr_status) {
656 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
657 "reset cmpl success\n");
658 /* Ready to send flogi out */
659 fnic->state = FNIC_IN_ETH_MODE;
660 } else {
661 FNIC_SCSI_DBG(KERN_DEBUG,
662 fnic->lport->host,
663 "fnic fw_reset : failed %s\n",
664 fnic_fcpio_status_to_str(hdr_status));
665
666 /*
667 * Unable to change to eth mode, cannot send out flogi
668 * Change state to fc mode, so that subsequent Flogi
669 * requests from libFC will cause more attempts to
670 * reset the firmware. Free the cached flogi
671 */
672 fnic->state = FNIC_IN_FC_MODE;
673 atomic64_inc(&reset_stats->fw_reset_failures);
674 ret = -1;
675 }
676 } else {
677 FNIC_SCSI_DBG(KERN_DEBUG,
678 fnic->lport->host,
679 "Unexpected state %s while processing"
680 " reset cmpl\n", fnic_state_to_str(fnic->state));
681 atomic64_inc(&reset_stats->fw_reset_failures);
682 ret = -1;
683 }
684
685 /* Thread removing device blocks till firmware reset is complete */
686 if (fnic->remove_wait)
687 complete(fnic->remove_wait);
688
689 /*
690 * If fnic is being removed, or fw reset failed
691 * free the flogi frame. Else, send it out
692 */
693 if (fnic->remove_wait || ret) {
694 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
695 skb_queue_purge(&fnic->tx_queue);
696 goto reset_cmpl_handler_end;
697 }
698
699 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
700
701 fnic_flush_tx(fnic);
702
703 reset_cmpl_handler_end:
704 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
705
706 return ret;
707 }
708
709 /*
710 * fnic_fcpio_flogi_reg_cmpl_handler
711 * Routine to handle flogi register completion
712 */
713 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
714 struct fcpio_fw_req *desc)
715 {
716 u8 type;
717 u8 hdr_status;
718 struct fcpio_tag tag;
719 int ret = 0;
720 unsigned long flags;
721
722 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
723
724 /* Update fnic state based on status of flogi reg completion */
725 spin_lock_irqsave(&fnic->fnic_lock, flags);
726
727 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
728
729 /* Check flogi registration completion status */
730 if (!hdr_status) {
731 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
732 "flog reg succeeded\n");
733 fnic->state = FNIC_IN_FC_MODE;
734 } else {
735 FNIC_SCSI_DBG(KERN_DEBUG,
736 fnic->lport->host,
737 "fnic flogi reg :failed %s\n",
738 fnic_fcpio_status_to_str(hdr_status));
739 fnic->state = FNIC_IN_ETH_MODE;
740 ret = -1;
741 }
742 } else {
743 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
744 "Unexpected fnic state %s while"
745 " processing flogi reg completion\n",
746 fnic_state_to_str(fnic->state));
747 ret = -1;
748 }
749
750 if (!ret) {
751 if (fnic->stop_rx_link_events) {
752 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
753 goto reg_cmpl_handler_end;
754 }
755 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
756
757 fnic_flush_tx(fnic);
758 queue_work(fnic_event_queue, &fnic->frame_work);
759 } else {
760 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
761 }
762
763 reg_cmpl_handler_end:
764 return ret;
765 }
766
767 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
768 u16 request_out)
769 {
770 if (wq->to_clean_index <= wq->to_use_index) {
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 } else {
776 /* out of range, stale request_out index */
777 if (request_out < wq->to_clean_index &&
778 request_out >= wq->to_use_index)
779 return 0;
780 }
781 /* request_out index is in range */
782 return 1;
783 }
784
785
786 /*
787 * Mark that ack received and store the Ack index. If there are multiple
788 * acks received before Tx thread cleans it up, the latest value will be
789 * used which is correct behavior. This state should be in the copy Wq
790 * instead of in the fnic
791 */
792 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
793 unsigned int cq_index,
794 struct fcpio_fw_req *desc)
795 {
796 struct vnic_wq_copy *wq;
797 u16 request_out = desc->u.ack.request_out;
798 unsigned long flags;
799 u64 *ox_id_tag = (u64 *)(void *)desc;
800
801 /* mark the ack state */
802 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
803 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
804
805 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
806 if (is_ack_index_in_range(wq, request_out)) {
807 fnic->fw_ack_index[0] = request_out;
808 fnic->fw_ack_recd[0] = 1;
809 } else
810 atomic64_inc(
811 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
812
813 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
814 FNIC_TRACE(fnic_fcpio_ack_handler,
815 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
816 ox_id_tag[4], ox_id_tag[5]);
817 }
818
819 /*
820 * fnic_fcpio_icmnd_cmpl_handler
821 * Routine to handle icmnd completions
822 */
823 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
824 struct fcpio_fw_req *desc)
825 {
826 u8 type;
827 u8 hdr_status;
828 struct fcpio_tag tag;
829 u32 id;
830 u64 xfer_len = 0;
831 struct fcpio_icmnd_cmpl *icmnd_cmpl;
832 struct fnic_io_req *io_req;
833 struct scsi_cmnd *sc;
834 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
835 unsigned long flags;
836 spinlock_t *io_lock;
837 u64 cmd_trace;
838 unsigned long start_time;
839 unsigned long io_duration_time;
840
841 /* Decode the cmpl description to get the io_req id */
842 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
843 fcpio_tag_id_dec(&tag, &id);
844 icmnd_cmpl = &desc->u.icmnd_cmpl;
845
846 if (id >= fnic->fnic_max_tag_id) {
847 shost_printk(KERN_ERR, fnic->lport->host,
848 "Tag out of range tag %x hdr status = %s\n",
849 id, fnic_fcpio_status_to_str(hdr_status));
850 return;
851 }
852
853 sc = scsi_host_find_tag(fnic->lport->host, id);
854 WARN_ON_ONCE(!sc);
855 if (!sc) {
856 atomic64_inc(&fnic_stats->io_stats.sc_null);
857 shost_printk(KERN_ERR, fnic->lport->host,
858 "icmnd_cmpl sc is null - "
859 "hdr status = %s tag = 0x%x desc = 0x%p\n",
860 fnic_fcpio_status_to_str(hdr_status), id, desc);
861 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
862 fnic->lport->host->host_no, id,
863 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
864 (u64)icmnd_cmpl->_resvd0[0]),
865 ((u64)hdr_status << 16 |
866 (u64)icmnd_cmpl->scsi_status << 8 |
867 (u64)icmnd_cmpl->flags), desc,
868 (u64)icmnd_cmpl->residual, 0);
869 return;
870 }
871
872 io_lock = fnic_io_lock_hash(fnic, sc);
873 spin_lock_irqsave(io_lock, flags);
874 io_req = (struct fnic_io_req *)CMD_SP(sc);
875 WARN_ON_ONCE(!io_req);
876 if (!io_req) {
877 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
878 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
879 spin_unlock_irqrestore(io_lock, flags);
880 shost_printk(KERN_ERR, fnic->lport->host,
881 "icmnd_cmpl io_req is null - "
882 "hdr status = %s tag = 0x%x sc 0x%p\n",
883 fnic_fcpio_status_to_str(hdr_status), id, sc);
884 return;
885 }
886 start_time = io_req->start_time;
887
888 /* firmware completed the io */
889 io_req->io_completed = 1;
890
891 /*
892 * if SCSI-ML has already issued abort on this command,
893 * set completion of the IO. The abts path will clean it up
894 */
895 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
896
897 /*
898 * set the FNIC_IO_DONE so that this doesn't get
899 * flagged as 'out of order' if it was not aborted
900 */
901 CMD_FLAGS(sc) |= FNIC_IO_DONE;
902 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
903 spin_unlock_irqrestore(io_lock, flags);
904 if(FCPIO_ABORTED == hdr_status)
905 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
906
907 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
908 "icmnd_cmpl abts pending "
909 "hdr status = %s tag = 0x%x sc = 0x%p "
910 "scsi_status = %x residual = %d\n",
911 fnic_fcpio_status_to_str(hdr_status),
912 id, sc,
913 icmnd_cmpl->scsi_status,
914 icmnd_cmpl->residual);
915 return;
916 }
917
918 /* Mark the IO as complete */
919 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
920
921 icmnd_cmpl = &desc->u.icmnd_cmpl;
922
923 switch (hdr_status) {
924 case FCPIO_SUCCESS:
925 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
926 xfer_len = scsi_bufflen(sc);
927 scsi_set_resid(sc, icmnd_cmpl->residual);
928
929 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
930 xfer_len -= icmnd_cmpl->residual;
931
932 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
933 atomic64_inc(&fnic_stats->misc_stats.check_condition);
934
935 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
936 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
937 break;
938
939 case FCPIO_TIMEOUT: /* request was timed out */
940 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
941 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
942 break;
943
944 case FCPIO_ABORTED: /* request was aborted */
945 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
946 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
947 break;
948
949 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
950 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
951 scsi_set_resid(sc, icmnd_cmpl->residual);
952 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
953 break;
954
955 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
956 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
957 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
958 break;
959
960 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
961 atomic64_inc(&fnic_stats->io_stats.io_not_found);
962 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
963 break;
964
965 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
966 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
967 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
968 break;
969
970 case FCPIO_FW_ERR: /* request was terminated due fw error */
971 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
972 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
973 break;
974
975 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
976 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
977 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
978 break;
979
980 case FCPIO_INVALID_HEADER: /* header contains invalid data */
981 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
982 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
983 default:
984 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
985 break;
986 }
987
988 /* Break link with the SCSI command */
989 CMD_SP(sc) = NULL;
990 CMD_FLAGS(sc) |= FNIC_IO_DONE;
991
992 spin_unlock_irqrestore(io_lock, flags);
993
994 if (hdr_status != FCPIO_SUCCESS) {
995 atomic64_inc(&fnic_stats->io_stats.io_failures);
996 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
997 fnic_fcpio_status_to_str(hdr_status));
998 }
999
1000 fnic_release_ioreq_buf(fnic, io_req, sc);
1001
1002 mempool_free(io_req, fnic->io_req_pool);
1003
1004 cmd_trace = ((u64)hdr_status << 56) |
1005 (u64)icmnd_cmpl->scsi_status << 48 |
1006 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
1007 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1008 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
1009
1010 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
1011 sc->device->host->host_no, id, sc,
1012 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
1013 (u64)icmnd_cmpl->_resvd0[0] << 48 |
1014 jiffies_to_msecs(jiffies - start_time)),
1015 desc, cmd_trace,
1016 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1017
1018 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1019 fnic->lport->host_stats.fcp_input_requests++;
1020 fnic->fcp_input_bytes += xfer_len;
1021 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1022 fnic->lport->host_stats.fcp_output_requests++;
1023 fnic->fcp_output_bytes += xfer_len;
1024 } else
1025 fnic->lport->host_stats.fcp_control_requests++;
1026
1027 atomic64_dec(&fnic_stats->io_stats.active_ios);
1028 if (atomic64_read(&fnic->io_cmpl_skip))
1029 atomic64_dec(&fnic->io_cmpl_skip);
1030 else
1031 atomic64_inc(&fnic_stats->io_stats.io_completions);
1032
1033
1034 io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1035
1036 if(io_duration_time <= 10)
1037 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
1038 else if(io_duration_time <= 100)
1039 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
1040 else if(io_duration_time <= 500)
1041 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
1042 else if(io_duration_time <= 5000)
1043 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
1044 else if(io_duration_time <= 10000)
1045 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
1046 else if(io_duration_time <= 30000)
1047 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
1048 else {
1049 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
1050
1051 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
1052 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
1053 }
1054
1055 /* Call SCSI completion function to complete the IO */
1056 if (sc->scsi_done)
1057 sc->scsi_done(sc);
1058 }
1059
1060 /* fnic_fcpio_itmf_cmpl_handler
1061 * Routine to handle itmf completions
1062 */
1063 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1064 struct fcpio_fw_req *desc)
1065 {
1066 u8 type;
1067 u8 hdr_status;
1068 struct fcpio_tag tag;
1069 u32 id;
1070 struct scsi_cmnd *sc;
1071 struct fnic_io_req *io_req;
1072 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1073 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1074 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1075 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1076 unsigned long flags;
1077 spinlock_t *io_lock;
1078 unsigned long start_time;
1079
1080 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1081 fcpio_tag_id_dec(&tag, &id);
1082
1083 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1084 shost_printk(KERN_ERR, fnic->lport->host,
1085 "Tag out of range tag %x hdr status = %s\n",
1086 id, fnic_fcpio_status_to_str(hdr_status));
1087 return;
1088 }
1089
1090 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1091 WARN_ON_ONCE(!sc);
1092 if (!sc) {
1093 atomic64_inc(&fnic_stats->io_stats.sc_null);
1094 shost_printk(KERN_ERR, fnic->lport->host,
1095 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1096 fnic_fcpio_status_to_str(hdr_status), id);
1097 return;
1098 }
1099 io_lock = fnic_io_lock_hash(fnic, sc);
1100 spin_lock_irqsave(io_lock, flags);
1101 io_req = (struct fnic_io_req *)CMD_SP(sc);
1102 WARN_ON_ONCE(!io_req);
1103 if (!io_req) {
1104 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1105 spin_unlock_irqrestore(io_lock, flags);
1106 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1107 shost_printk(KERN_ERR, fnic->lport->host,
1108 "itmf_cmpl io_req is null - "
1109 "hdr status = %s tag = 0x%x sc 0x%p\n",
1110 fnic_fcpio_status_to_str(hdr_status), id, sc);
1111 return;
1112 }
1113 start_time = io_req->start_time;
1114
1115 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1116 /* Abort and terminate completion of device reset req */
1117 /* REVISIT : Add asserts about various flags */
1118 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1119 "dev reset abts cmpl recd. id %x status %s\n",
1120 id, fnic_fcpio_status_to_str(hdr_status));
1121 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1122 CMD_ABTS_STATUS(sc) = hdr_status;
1123 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1124 if (io_req->abts_done)
1125 complete(io_req->abts_done);
1126 spin_unlock_irqrestore(io_lock, flags);
1127 } else if (id & FNIC_TAG_ABORT) {
1128 /* Completion of abort cmd */
1129 switch (hdr_status) {
1130 case FCPIO_SUCCESS:
1131 break;
1132 case FCPIO_TIMEOUT:
1133 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1134 atomic64_inc(&abts_stats->abort_fw_timeouts);
1135 else
1136 atomic64_inc(
1137 &term_stats->terminate_fw_timeouts);
1138 break;
1139 case FCPIO_ITMF_REJECTED:
1140 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1141 "abort reject recd. id %d\n",
1142 (int)(id & FNIC_TAG_MASK));
1143 break;
1144 case FCPIO_IO_NOT_FOUND:
1145 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1146 atomic64_inc(&abts_stats->abort_io_not_found);
1147 else
1148 atomic64_inc(
1149 &term_stats->terminate_io_not_found);
1150 break;
1151 default:
1152 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1153 atomic64_inc(&abts_stats->abort_failures);
1154 else
1155 atomic64_inc(
1156 &term_stats->terminate_failures);
1157 break;
1158 }
1159 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1160 /* This is a late completion. Ignore it */
1161 spin_unlock_irqrestore(io_lock, flags);
1162 return;
1163 }
1164
1165 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1166 CMD_ABTS_STATUS(sc) = hdr_status;
1167
1168 /* If the status is IO not found consider it as success */
1169 if (hdr_status == FCPIO_IO_NOT_FOUND)
1170 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
1171
1172 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1173 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1174
1175 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1176 "abts cmpl recd. id %d status %s\n",
1177 (int)(id & FNIC_TAG_MASK),
1178 fnic_fcpio_status_to_str(hdr_status));
1179
1180 /*
1181 * If scsi_eh thread is blocked waiting for abts to complete,
1182 * signal completion to it. IO will be cleaned in the thread
1183 * else clean it in this context
1184 */
1185 if (io_req->abts_done) {
1186 complete(io_req->abts_done);
1187 spin_unlock_irqrestore(io_lock, flags);
1188 } else {
1189 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1190 "abts cmpl, completing IO\n");
1191 CMD_SP(sc) = NULL;
1192 sc->result = (DID_ERROR << 16);
1193
1194 spin_unlock_irqrestore(io_lock, flags);
1195
1196 fnic_release_ioreq_buf(fnic, io_req, sc);
1197 mempool_free(io_req, fnic->io_req_pool);
1198 if (sc->scsi_done) {
1199 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1200 sc->device->host->host_no, id,
1201 sc,
1202 jiffies_to_msecs(jiffies - start_time),
1203 desc,
1204 (((u64)hdr_status << 40) |
1205 (u64)sc->cmnd[0] << 32 |
1206 (u64)sc->cmnd[2] << 24 |
1207 (u64)sc->cmnd[3] << 16 |
1208 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1209 (((u64)CMD_FLAGS(sc) << 32) |
1210 CMD_STATE(sc)));
1211 sc->scsi_done(sc);
1212 atomic64_dec(&fnic_stats->io_stats.active_ios);
1213 if (atomic64_read(&fnic->io_cmpl_skip))
1214 atomic64_dec(&fnic->io_cmpl_skip);
1215 else
1216 atomic64_inc(&fnic_stats->io_stats.io_completions);
1217 }
1218 }
1219
1220 } else if (id & FNIC_TAG_DEV_RST) {
1221 /* Completion of device reset */
1222 CMD_LR_STATUS(sc) = hdr_status;
1223 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1224 spin_unlock_irqrestore(io_lock, flags);
1225 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1226 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1227 sc->device->host->host_no, id, sc,
1228 jiffies_to_msecs(jiffies - start_time),
1229 desc, 0,
1230 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1231 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1232 "Terminate pending "
1233 "dev reset cmpl recd. id %d status %s\n",
1234 (int)(id & FNIC_TAG_MASK),
1235 fnic_fcpio_status_to_str(hdr_status));
1236 return;
1237 }
1238 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1239 /* Need to wait for terminate completion */
1240 spin_unlock_irqrestore(io_lock, flags);
1241 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1242 sc->device->host->host_no, id, sc,
1243 jiffies_to_msecs(jiffies - start_time),
1244 desc, 0,
1245 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1246 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1247 "dev reset cmpl recd after time out. "
1248 "id %d status %s\n",
1249 (int)(id & FNIC_TAG_MASK),
1250 fnic_fcpio_status_to_str(hdr_status));
1251 return;
1252 }
1253 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1254 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1255 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1256 "dev reset cmpl recd. id %d status %s\n",
1257 (int)(id & FNIC_TAG_MASK),
1258 fnic_fcpio_status_to_str(hdr_status));
1259 if (io_req->dr_done)
1260 complete(io_req->dr_done);
1261 spin_unlock_irqrestore(io_lock, flags);
1262
1263 } else {
1264 shost_printk(KERN_ERR, fnic->lport->host,
1265 "Unexpected itmf io state %s tag %x\n",
1266 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1267 spin_unlock_irqrestore(io_lock, flags);
1268 }
1269
1270 }
1271
1272 /*
1273 * fnic_fcpio_cmpl_handler
1274 * Routine to service the cq for wq_copy
1275 */
1276 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1277 unsigned int cq_index,
1278 struct fcpio_fw_req *desc)
1279 {
1280 struct fnic *fnic = vnic_dev_priv(vdev);
1281
1282 switch (desc->hdr.type) {
1283 case FCPIO_ICMND_CMPL: /* fw completed a command */
1284 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1285 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1286 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1287 case FCPIO_RESET_CMPL: /* fw completed reset */
1288 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1289 break;
1290 default:
1291 break;
1292 }
1293
1294 switch (desc->hdr.type) {
1295 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1296 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1297 break;
1298
1299 case FCPIO_ICMND_CMPL: /* fw completed a command */
1300 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1301 break;
1302
1303 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1304 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1305 break;
1306
1307 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1308 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1309 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1310 break;
1311
1312 case FCPIO_RESET_CMPL: /* fw completed reset */
1313 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1314 break;
1315
1316 default:
1317 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1318 "firmware completion type %d\n",
1319 desc->hdr.type);
1320 break;
1321 }
1322
1323 return 0;
1324 }
1325
1326 /*
1327 * fnic_wq_copy_cmpl_handler
1328 * Routine to process wq copy
1329 */
1330 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1331 {
1332 unsigned int wq_work_done = 0;
1333 unsigned int i, cq_index;
1334 unsigned int cur_work_done;
1335
1336 for (i = 0; i < fnic->wq_copy_count; i++) {
1337 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1338 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1339 fnic_fcpio_cmpl_handler,
1340 copy_work_to_do);
1341 wq_work_done += cur_work_done;
1342 }
1343 return wq_work_done;
1344 }
1345
1346 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1347 {
1348 int i;
1349 struct fnic_io_req *io_req;
1350 unsigned long flags = 0;
1351 struct scsi_cmnd *sc;
1352 spinlock_t *io_lock;
1353 unsigned long start_time = 0;
1354 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1355
1356 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1357 if (i == exclude_id)
1358 continue;
1359
1360 io_lock = fnic_io_lock_tag(fnic, i);
1361 spin_lock_irqsave(io_lock, flags);
1362 sc = scsi_host_find_tag(fnic->lport->host, i);
1363 if (!sc) {
1364 spin_unlock_irqrestore(io_lock, flags);
1365 continue;
1366 }
1367
1368 io_req = (struct fnic_io_req *)CMD_SP(sc);
1369 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1370 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1371 /*
1372 * We will be here only when FW completes reset
1373 * without sending completions for outstanding ios.
1374 */
1375 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1376 if (io_req && io_req->dr_done)
1377 complete(io_req->dr_done);
1378 else if (io_req && io_req->abts_done)
1379 complete(io_req->abts_done);
1380 spin_unlock_irqrestore(io_lock, flags);
1381 continue;
1382 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1383 spin_unlock_irqrestore(io_lock, flags);
1384 continue;
1385 }
1386 if (!io_req) {
1387 spin_unlock_irqrestore(io_lock, flags);
1388 goto cleanup_scsi_cmd;
1389 }
1390
1391 CMD_SP(sc) = NULL;
1392
1393 spin_unlock_irqrestore(io_lock, flags);
1394
1395 /*
1396 * If there is a scsi_cmnd associated with this io_req, then
1397 * free the corresponding state
1398 */
1399 start_time = io_req->start_time;
1400 fnic_release_ioreq_buf(fnic, io_req, sc);
1401 mempool_free(io_req, fnic->io_req_pool);
1402
1403 cleanup_scsi_cmd:
1404 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1405 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1406 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n",
1407 __func__, (jiffies - start_time));
1408
1409 if (atomic64_read(&fnic->io_cmpl_skip))
1410 atomic64_dec(&fnic->io_cmpl_skip);
1411 else
1412 atomic64_inc(&fnic_stats->io_stats.io_completions);
1413
1414 /* Complete the command to SCSI */
1415 if (sc->scsi_done) {
1416 FNIC_TRACE(fnic_cleanup_io,
1417 sc->device->host->host_no, i, sc,
1418 jiffies_to_msecs(jiffies - start_time),
1419 0, ((u64)sc->cmnd[0] << 32 |
1420 (u64)sc->cmnd[2] << 24 |
1421 (u64)sc->cmnd[3] << 16 |
1422 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1423 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1424
1425 sc->scsi_done(sc);
1426 }
1427 }
1428 }
1429
1430 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1431 struct fcpio_host_req *desc)
1432 {
1433 u32 id;
1434 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1435 struct fnic_io_req *io_req;
1436 struct scsi_cmnd *sc;
1437 unsigned long flags;
1438 spinlock_t *io_lock;
1439 unsigned long start_time = 0;
1440
1441 /* get the tag reference */
1442 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1443 id &= FNIC_TAG_MASK;
1444
1445 if (id >= fnic->fnic_max_tag_id)
1446 return;
1447
1448 sc = scsi_host_find_tag(fnic->lport->host, id);
1449 if (!sc)
1450 return;
1451
1452 io_lock = fnic_io_lock_hash(fnic, sc);
1453 spin_lock_irqsave(io_lock, flags);
1454
1455 /* Get the IO context which this desc refers to */
1456 io_req = (struct fnic_io_req *)CMD_SP(sc);
1457
1458 /* fnic interrupts are turned off by now */
1459
1460 if (!io_req) {
1461 spin_unlock_irqrestore(io_lock, flags);
1462 goto wq_copy_cleanup_scsi_cmd;
1463 }
1464
1465 CMD_SP(sc) = NULL;
1466
1467 spin_unlock_irqrestore(io_lock, flags);
1468
1469 start_time = io_req->start_time;
1470 fnic_release_ioreq_buf(fnic, io_req, sc);
1471 mempool_free(io_req, fnic->io_req_pool);
1472
1473 wq_copy_cleanup_scsi_cmd:
1474 sc->result = DID_NO_CONNECT << 16;
1475 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1476 " DID_NO_CONNECT\n");
1477
1478 if (sc->scsi_done) {
1479 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1480 sc->device->host->host_no, id, sc,
1481 jiffies_to_msecs(jiffies - start_time),
1482 0, ((u64)sc->cmnd[0] << 32 |
1483 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1484 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1485 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1486
1487 sc->scsi_done(sc);
1488 }
1489 }
1490
1491 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1492 u32 task_req, u8 *fc_lun,
1493 struct fnic_io_req *io_req)
1494 {
1495 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1496 struct Scsi_Host *host = fnic->lport->host;
1497 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1498 unsigned long flags;
1499
1500 spin_lock_irqsave(host->host_lock, flags);
1501 if (unlikely(fnic_chk_state_flags_locked(fnic,
1502 FNIC_FLAGS_IO_BLOCKED))) {
1503 spin_unlock_irqrestore(host->host_lock, flags);
1504 return 1;
1505 } else
1506 atomic_inc(&fnic->in_flight);
1507 spin_unlock_irqrestore(host->host_lock, flags);
1508
1509 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1510
1511 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1512 free_wq_copy_descs(fnic, wq);
1513
1514 if (!vnic_wq_copy_desc_avail(wq)) {
1515 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1516 atomic_dec(&fnic->in_flight);
1517 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1518 "fnic_queue_abort_io_req: failure: no descriptors\n");
1519 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1520 return 1;
1521 }
1522 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1523 0, task_req, tag, fc_lun, io_req->port_id,
1524 fnic->config.ra_tov, fnic->config.ed_tov);
1525
1526 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1527 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1528 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1529 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1530 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1531
1532 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1533 atomic_dec(&fnic->in_flight);
1534
1535 return 0;
1536 }
1537
1538 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1539 {
1540 int tag;
1541 int abt_tag;
1542 int term_cnt = 0;
1543 struct fnic_io_req *io_req;
1544 spinlock_t *io_lock;
1545 unsigned long flags;
1546 struct scsi_cmnd *sc;
1547 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1548 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1549 struct scsi_lun fc_lun;
1550 enum fnic_ioreq_state old_ioreq_state;
1551
1552 FNIC_SCSI_DBG(KERN_DEBUG,
1553 fnic->lport->host,
1554 "fnic_rport_exch_reset called portid 0x%06x\n",
1555 port_id);
1556
1557 if (fnic->in_remove)
1558 return;
1559
1560 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1561 abt_tag = tag;
1562 io_lock = fnic_io_lock_tag(fnic, tag);
1563 spin_lock_irqsave(io_lock, flags);
1564 sc = scsi_host_find_tag(fnic->lport->host, tag);
1565 if (!sc) {
1566 spin_unlock_irqrestore(io_lock, flags);
1567 continue;
1568 }
1569
1570 io_req = (struct fnic_io_req *)CMD_SP(sc);
1571
1572 if (!io_req || io_req->port_id != port_id) {
1573 spin_unlock_irqrestore(io_lock, flags);
1574 continue;
1575 }
1576
1577 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1578 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1579 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1580 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1581 sc);
1582 spin_unlock_irqrestore(io_lock, flags);
1583 continue;
1584 }
1585
1586 /*
1587 * Found IO that is still pending with firmware and
1588 * belongs to rport that went away
1589 */
1590 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1591 spin_unlock_irqrestore(io_lock, flags);
1592 continue;
1593 }
1594 if (io_req->abts_done) {
1595 shost_printk(KERN_ERR, fnic->lport->host,
1596 "fnic_rport_exch_reset: io_req->abts_done is set "
1597 "state is %s\n",
1598 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1599 }
1600
1601 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1602 shost_printk(KERN_ERR, fnic->lport->host,
1603 "rport_exch_reset "
1604 "IO not yet issued %p tag 0x%x flags "
1605 "%x state %d\n",
1606 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1607 }
1608 old_ioreq_state = CMD_STATE(sc);
1609 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1610 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1611 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1612 atomic64_inc(&reset_stats->device_reset_terminates);
1613 abt_tag = (tag | FNIC_TAG_DEV_RST);
1614 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1615 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1616 sc);
1617 }
1618
1619 BUG_ON(io_req->abts_done);
1620
1621 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1622 "fnic_rport_reset_exch: Issuing abts\n");
1623
1624 spin_unlock_irqrestore(io_lock, flags);
1625
1626 /* Now queue the abort command to firmware */
1627 int_to_scsilun(sc->device->lun, &fc_lun);
1628
1629 if (fnic_queue_abort_io_req(fnic, abt_tag,
1630 FCPIO_ITMF_ABT_TASK_TERM,
1631 fc_lun.scsi_lun, io_req)) {
1632 /*
1633 * Revert the cmd state back to old state, if
1634 * it hasn't changed in between. This cmd will get
1635 * aborted later by scsi_eh, or cleaned up during
1636 * lun reset
1637 */
1638 spin_lock_irqsave(io_lock, flags);
1639 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1640 CMD_STATE(sc) = old_ioreq_state;
1641 spin_unlock_irqrestore(io_lock, flags);
1642 } else {
1643 spin_lock_irqsave(io_lock, flags);
1644 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1645 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1646 else
1647 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1648 spin_unlock_irqrestore(io_lock, flags);
1649 atomic64_inc(&term_stats->terminates);
1650 term_cnt++;
1651 }
1652 }
1653 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1654 atomic64_set(&term_stats->max_terminates, term_cnt);
1655
1656 }
1657
1658 void fnic_terminate_rport_io(struct fc_rport *rport)
1659 {
1660 int tag;
1661 int abt_tag;
1662 int term_cnt = 0;
1663 struct fnic_io_req *io_req;
1664 spinlock_t *io_lock;
1665 unsigned long flags;
1666 struct scsi_cmnd *sc;
1667 struct scsi_lun fc_lun;
1668 struct fc_rport_libfc_priv *rdata;
1669 struct fc_lport *lport;
1670 struct fnic *fnic;
1671 struct fc_rport *cmd_rport;
1672 struct reset_stats *reset_stats;
1673 struct terminate_stats *term_stats;
1674 enum fnic_ioreq_state old_ioreq_state;
1675
1676 if (!rport) {
1677 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1678 return;
1679 }
1680 rdata = rport->dd_data;
1681
1682 if (!rdata) {
1683 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1684 return;
1685 }
1686 lport = rdata->local_port;
1687
1688 if (!lport) {
1689 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1690 return;
1691 }
1692 fnic = lport_priv(lport);
1693 FNIC_SCSI_DBG(KERN_DEBUG,
1694 fnic->lport->host, "fnic_terminate_rport_io called"
1695 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1696 rport->port_name, rport->node_name, rport,
1697 rport->port_id);
1698
1699 if (fnic->in_remove)
1700 return;
1701
1702 reset_stats = &fnic->fnic_stats.reset_stats;
1703 term_stats = &fnic->fnic_stats.term_stats;
1704
1705 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1706 abt_tag = tag;
1707 io_lock = fnic_io_lock_tag(fnic, tag);
1708 spin_lock_irqsave(io_lock, flags);
1709 sc = scsi_host_find_tag(fnic->lport->host, tag);
1710 if (!sc) {
1711 spin_unlock_irqrestore(io_lock, flags);
1712 continue;
1713 }
1714
1715 cmd_rport = starget_to_rport(scsi_target(sc->device));
1716 if (rport != cmd_rport) {
1717 spin_unlock_irqrestore(io_lock, flags);
1718 continue;
1719 }
1720
1721 io_req = (struct fnic_io_req *)CMD_SP(sc);
1722
1723 if (!io_req || rport != cmd_rport) {
1724 spin_unlock_irqrestore(io_lock, flags);
1725 continue;
1726 }
1727
1728 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1729 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1730 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1731 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1732 sc);
1733 spin_unlock_irqrestore(io_lock, flags);
1734 continue;
1735 }
1736 /*
1737 * Found IO that is still pending with firmware and
1738 * belongs to rport that went away
1739 */
1740 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1741 spin_unlock_irqrestore(io_lock, flags);
1742 continue;
1743 }
1744 if (io_req->abts_done) {
1745 shost_printk(KERN_ERR, fnic->lport->host,
1746 "fnic_terminate_rport_io: io_req->abts_done is set "
1747 "state is %s\n",
1748 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1749 }
1750 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1751 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1752 "fnic_terminate_rport_io "
1753 "IO not yet issued %p tag 0x%x flags "
1754 "%x state %d\n",
1755 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1756 }
1757 old_ioreq_state = CMD_STATE(sc);
1758 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1759 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1760 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1761 atomic64_inc(&reset_stats->device_reset_terminates);
1762 abt_tag = (tag | FNIC_TAG_DEV_RST);
1763 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1764 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1765 }
1766
1767 BUG_ON(io_req->abts_done);
1768
1769 FNIC_SCSI_DBG(KERN_DEBUG,
1770 fnic->lport->host,
1771 "fnic_terminate_rport_io: Issuing abts\n");
1772
1773 spin_unlock_irqrestore(io_lock, flags);
1774
1775 /* Now queue the abort command to firmware */
1776 int_to_scsilun(sc->device->lun, &fc_lun);
1777
1778 if (fnic_queue_abort_io_req(fnic, abt_tag,
1779 FCPIO_ITMF_ABT_TASK_TERM,
1780 fc_lun.scsi_lun, io_req)) {
1781 /*
1782 * Revert the cmd state back to old state, if
1783 * it hasn't changed in between. This cmd will get
1784 * aborted later by scsi_eh, or cleaned up during
1785 * lun reset
1786 */
1787 spin_lock_irqsave(io_lock, flags);
1788 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1789 CMD_STATE(sc) = old_ioreq_state;
1790 spin_unlock_irqrestore(io_lock, flags);
1791 } else {
1792 spin_lock_irqsave(io_lock, flags);
1793 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1794 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1795 else
1796 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1797 spin_unlock_irqrestore(io_lock, flags);
1798 atomic64_inc(&term_stats->terminates);
1799 term_cnt++;
1800 }
1801 }
1802 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1803 atomic64_set(&term_stats->max_terminates, term_cnt);
1804
1805 }
1806
1807 /*
1808 * This function is exported to SCSI for sending abort cmnds.
1809 * A SCSI IO is represented by a io_req in the driver.
1810 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1811 */
1812 int fnic_abort_cmd(struct scsi_cmnd *sc)
1813 {
1814 struct fc_lport *lp;
1815 struct fnic *fnic;
1816 struct fnic_io_req *io_req = NULL;
1817 struct fc_rport *rport;
1818 spinlock_t *io_lock;
1819 unsigned long flags;
1820 unsigned long start_time = 0;
1821 int ret = SUCCESS;
1822 u32 task_req = 0;
1823 struct scsi_lun fc_lun;
1824 struct fnic_stats *fnic_stats;
1825 struct abort_stats *abts_stats;
1826 struct terminate_stats *term_stats;
1827 enum fnic_ioreq_state old_ioreq_state;
1828 int tag;
1829 unsigned long abt_issued_time;
1830 DECLARE_COMPLETION_ONSTACK(tm_done);
1831
1832 /* Wait for rport to unblock */
1833 fc_block_scsi_eh(sc);
1834
1835 /* Get local-port, check ready and link up */
1836 lp = shost_priv(sc->device->host);
1837
1838 fnic = lport_priv(lp);
1839 fnic_stats = &fnic->fnic_stats;
1840 abts_stats = &fnic->fnic_stats.abts_stats;
1841 term_stats = &fnic->fnic_stats.term_stats;
1842
1843 rport = starget_to_rport(scsi_target(sc->device));
1844 tag = sc->request->tag;
1845 FNIC_SCSI_DBG(KERN_DEBUG,
1846 fnic->lport->host,
1847 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1848 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1849
1850 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1851
1852 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1853 ret = FAILED;
1854 goto fnic_abort_cmd_end;
1855 }
1856
1857 /*
1858 * Avoid a race between SCSI issuing the abort and the device
1859 * completing the command.
1860 *
1861 * If the command is already completed by the fw cmpl code,
1862 * we just return SUCCESS from here. This means that the abort
1863 * succeeded. In the SCSI ML, since the timeout for command has
1864 * happened, the completion wont actually complete the command
1865 * and it will be considered as an aborted command
1866 *
1867 * The CMD_SP will not be cleared except while holding io_req_lock.
1868 */
1869 io_lock = fnic_io_lock_hash(fnic, sc);
1870 spin_lock_irqsave(io_lock, flags);
1871 io_req = (struct fnic_io_req *)CMD_SP(sc);
1872 if (!io_req) {
1873 spin_unlock_irqrestore(io_lock, flags);
1874 goto fnic_abort_cmd_end;
1875 }
1876
1877 io_req->abts_done = &tm_done;
1878
1879 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1880 spin_unlock_irqrestore(io_lock, flags);
1881 goto wait_pending;
1882 }
1883
1884 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1885 if (abt_issued_time <= 6000)
1886 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
1887 else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
1888 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
1889 else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
1890 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
1891 else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
1892 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
1893 else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
1894 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
1895 else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
1896 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
1897 else
1898 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
1899
1900 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1901 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
1902 /*
1903 * Command is still pending, need to abort it
1904 * If the firmware completes the command after this point,
1905 * the completion wont be done till mid-layer, since abort
1906 * has already started.
1907 */
1908 old_ioreq_state = CMD_STATE(sc);
1909 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1910 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1911
1912 spin_unlock_irqrestore(io_lock, flags);
1913
1914 /*
1915 * Check readiness of the remote port. If the path to remote
1916 * port is up, then send abts to the remote port to terminate
1917 * the IO. Else, just locally terminate the IO in the firmware
1918 */
1919 if (fc_remote_port_chkready(rport) == 0)
1920 task_req = FCPIO_ITMF_ABT_TASK;
1921 else {
1922 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1923 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1924 }
1925
1926 /* Now queue the abort command to firmware */
1927 int_to_scsilun(sc->device->lun, &fc_lun);
1928
1929 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1930 fc_lun.scsi_lun, io_req)) {
1931 spin_lock_irqsave(io_lock, flags);
1932 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1933 CMD_STATE(sc) = old_ioreq_state;
1934 io_req = (struct fnic_io_req *)CMD_SP(sc);
1935 if (io_req)
1936 io_req->abts_done = NULL;
1937 spin_unlock_irqrestore(io_lock, flags);
1938 ret = FAILED;
1939 goto fnic_abort_cmd_end;
1940 }
1941 if (task_req == FCPIO_ITMF_ABT_TASK) {
1942 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1943 atomic64_inc(&fnic_stats->abts_stats.aborts);
1944 } else {
1945 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1946 atomic64_inc(&fnic_stats->term_stats.terminates);
1947 }
1948
1949 /*
1950 * We queued an abort IO, wait for its completion.
1951 * Once the firmware completes the abort command, it will
1952 * wake up this thread.
1953 */
1954 wait_pending:
1955 wait_for_completion_timeout(&tm_done,
1956 msecs_to_jiffies
1957 (2 * fnic->config.ra_tov +
1958 fnic->config.ed_tov));
1959
1960 /* Check the abort status */
1961 spin_lock_irqsave(io_lock, flags);
1962
1963 io_req = (struct fnic_io_req *)CMD_SP(sc);
1964 if (!io_req) {
1965 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1966 spin_unlock_irqrestore(io_lock, flags);
1967 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1968 ret = FAILED;
1969 goto fnic_abort_cmd_end;
1970 }
1971 io_req->abts_done = NULL;
1972
1973 /* fw did not complete abort, timed out */
1974 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1975 spin_unlock_irqrestore(io_lock, flags);
1976 if (task_req == FCPIO_ITMF_ABT_TASK) {
1977 atomic64_inc(&abts_stats->abort_drv_timeouts);
1978 } else {
1979 atomic64_inc(&term_stats->terminate_drv_timeouts);
1980 }
1981 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1982 ret = FAILED;
1983 goto fnic_abort_cmd_end;
1984 }
1985
1986 /* IO out of order */
1987
1988 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1989 spin_unlock_irqrestore(io_lock, flags);
1990 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1991 "Issuing Host reset due to out of order IO\n");
1992
1993 ret = FAILED;
1994 goto fnic_abort_cmd_end;
1995 }
1996
1997 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1998
1999 start_time = io_req->start_time;
2000 /*
2001 * firmware completed the abort, check the status,
2002 * free the io_req if successful. If abort fails,
2003 * Device reset will clean the I/O.
2004 */
2005 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS)
2006 CMD_SP(sc) = NULL;
2007 else {
2008 ret = FAILED;
2009 spin_unlock_irqrestore(io_lock, flags);
2010 goto fnic_abort_cmd_end;
2011 }
2012
2013 spin_unlock_irqrestore(io_lock, flags);
2014
2015 fnic_release_ioreq_buf(fnic, io_req, sc);
2016 mempool_free(io_req, fnic->io_req_pool);
2017
2018 if (sc->scsi_done) {
2019 /* Call SCSI completion function to complete the IO */
2020 sc->result = (DID_ABORT << 16);
2021 sc->scsi_done(sc);
2022 atomic64_dec(&fnic_stats->io_stats.active_ios);
2023 if (atomic64_read(&fnic->io_cmpl_skip))
2024 atomic64_dec(&fnic->io_cmpl_skip);
2025 else
2026 atomic64_inc(&fnic_stats->io_stats.io_completions);
2027 }
2028
2029 fnic_abort_cmd_end:
2030 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
2031 sc->request->tag, sc,
2032 jiffies_to_msecs(jiffies - start_time),
2033 0, ((u64)sc->cmnd[0] << 32 |
2034 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2035 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2036 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2037
2038 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2039 "Returning from abort cmd type %x %s\n", task_req,
2040 (ret == SUCCESS) ?
2041 "SUCCESS" : "FAILED");
2042 return ret;
2043 }
2044
2045 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
2046 struct scsi_cmnd *sc,
2047 struct fnic_io_req *io_req)
2048 {
2049 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
2050 struct Scsi_Host *host = fnic->lport->host;
2051 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
2052 struct scsi_lun fc_lun;
2053 int ret = 0;
2054 unsigned long intr_flags;
2055
2056 spin_lock_irqsave(host->host_lock, intr_flags);
2057 if (unlikely(fnic_chk_state_flags_locked(fnic,
2058 FNIC_FLAGS_IO_BLOCKED))) {
2059 spin_unlock_irqrestore(host->host_lock, intr_flags);
2060 return FAILED;
2061 } else
2062 atomic_inc(&fnic->in_flight);
2063 spin_unlock_irqrestore(host->host_lock, intr_flags);
2064
2065 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
2066
2067 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
2068 free_wq_copy_descs(fnic, wq);
2069
2070 if (!vnic_wq_copy_desc_avail(wq)) {
2071 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2072 "queue_dr_io_req failure - no descriptors\n");
2073 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
2074 ret = -EAGAIN;
2075 goto lr_io_req_end;
2076 }
2077
2078 /* fill in the lun info */
2079 int_to_scsilun(sc->device->lun, &fc_lun);
2080
2081 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
2082 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
2083 fc_lun.scsi_lun, io_req->port_id,
2084 fnic->config.ra_tov, fnic->config.ed_tov);
2085
2086 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
2087 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
2088 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
2089 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
2090 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
2091
2092 lr_io_req_end:
2093 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
2094 atomic_dec(&fnic->in_flight);
2095
2096 return ret;
2097 }
2098
2099 /*
2100 * Clean up any pending aborts on the lun
2101 * For each outstanding IO on this lun, whose abort is not completed by fw,
2102 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2103 * successfully aborted, 1 otherwise
2104 */
2105 static int fnic_clean_pending_aborts(struct fnic *fnic,
2106 struct scsi_cmnd *lr_sc,
2107 bool new_sc)
2108
2109 {
2110 int tag, abt_tag;
2111 struct fnic_io_req *io_req;
2112 spinlock_t *io_lock;
2113 unsigned long flags;
2114 int ret = 0;
2115 struct scsi_cmnd *sc;
2116 struct scsi_lun fc_lun;
2117 struct scsi_device *lun_dev = lr_sc->device;
2118 DECLARE_COMPLETION_ONSTACK(tm_done);
2119 enum fnic_ioreq_state old_ioreq_state;
2120
2121 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2122 io_lock = fnic_io_lock_tag(fnic, tag);
2123 spin_lock_irqsave(io_lock, flags);
2124 sc = scsi_host_find_tag(fnic->lport->host, tag);
2125 /*
2126 * ignore this lun reset cmd if issued using new SC
2127 * or cmds that do not belong to this lun
2128 */
2129 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) {
2130 spin_unlock_irqrestore(io_lock, flags);
2131 continue;
2132 }
2133
2134 io_req = (struct fnic_io_req *)CMD_SP(sc);
2135
2136 if (!io_req || sc->device != lun_dev) {
2137 spin_unlock_irqrestore(io_lock, flags);
2138 continue;
2139 }
2140
2141 /*
2142 * Found IO that is still pending with firmware and
2143 * belongs to the LUN that we are resetting
2144 */
2145 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2146 "Found IO in %s on lun\n",
2147 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2148
2149 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2150 spin_unlock_irqrestore(io_lock, flags);
2151 continue;
2152 }
2153 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2154 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2155 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2156 "%s dev rst not pending sc 0x%p\n", __func__,
2157 sc);
2158 spin_unlock_irqrestore(io_lock, flags);
2159 continue;
2160 }
2161
2162 if (io_req->abts_done)
2163 shost_printk(KERN_ERR, fnic->lport->host,
2164 "%s: io_req->abts_done is set state is %s\n",
2165 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2166 old_ioreq_state = CMD_STATE(sc);
2167 /*
2168 * Any pending IO issued prior to reset is expected to be
2169 * in abts pending state, if not we need to set
2170 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2171 * When IO is completed, the IO will be handed over and
2172 * handled in this function.
2173 */
2174 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2175
2176 BUG_ON(io_req->abts_done);
2177
2178 abt_tag = tag;
2179 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2180 abt_tag |= FNIC_TAG_DEV_RST;
2181 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2182 "%s: dev rst sc 0x%p\n", __func__, sc);
2183 }
2184
2185 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2186 io_req->abts_done = &tm_done;
2187 spin_unlock_irqrestore(io_lock, flags);
2188
2189 /* Now queue the abort command to firmware */
2190 int_to_scsilun(sc->device->lun, &fc_lun);
2191
2192 if (fnic_queue_abort_io_req(fnic, abt_tag,
2193 FCPIO_ITMF_ABT_TASK_TERM,
2194 fc_lun.scsi_lun, io_req)) {
2195 spin_lock_irqsave(io_lock, flags);
2196 io_req = (struct fnic_io_req *)CMD_SP(sc);
2197 if (io_req)
2198 io_req->abts_done = NULL;
2199 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2200 CMD_STATE(sc) = old_ioreq_state;
2201 spin_unlock_irqrestore(io_lock, flags);
2202 ret = 1;
2203 goto clean_pending_aborts_end;
2204 } else {
2205 spin_lock_irqsave(io_lock, flags);
2206 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2207 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2208 spin_unlock_irqrestore(io_lock, flags);
2209 }
2210 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2211
2212 wait_for_completion_timeout(&tm_done,
2213 msecs_to_jiffies
2214 (fnic->config.ed_tov));
2215
2216 /* Recheck cmd state to check if it is now aborted */
2217 spin_lock_irqsave(io_lock, flags);
2218 io_req = (struct fnic_io_req *)CMD_SP(sc);
2219 if (!io_req) {
2220 spin_unlock_irqrestore(io_lock, flags);
2221 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2222 continue;
2223 }
2224
2225 io_req->abts_done = NULL;
2226
2227 /* if abort is still pending with fw, fail */
2228 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2229 spin_unlock_irqrestore(io_lock, flags);
2230 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2231 ret = 1;
2232 goto clean_pending_aborts_end;
2233 }
2234 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2235
2236 /* original sc used for lr is handled by dev reset code */
2237 if (sc != lr_sc)
2238 CMD_SP(sc) = NULL;
2239 spin_unlock_irqrestore(io_lock, flags);
2240
2241 /* original sc used for lr is handled by dev reset code */
2242 if (sc != lr_sc) {
2243 fnic_release_ioreq_buf(fnic, io_req, sc);
2244 mempool_free(io_req, fnic->io_req_pool);
2245 }
2246
2247 /*
2248 * Any IO is returned during reset, it needs to call scsi_done
2249 * to return the scsi_cmnd to upper layer.
2250 */
2251 if (sc->scsi_done) {
2252 /* Set result to let upper SCSI layer retry */
2253 sc->result = DID_RESET << 16;
2254 sc->scsi_done(sc);
2255 }
2256 }
2257
2258 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2259
2260 /* walk again to check, if IOs are still pending in fw */
2261 if (fnic_is_abts_pending(fnic, lr_sc))
2262 ret = FAILED;
2263
2264 clean_pending_aborts_end:
2265 return ret;
2266 }
2267
2268 /**
2269 * fnic_scsi_host_start_tag
2270 * Allocates tagid from host's tag list
2271 **/
2272 static inline int
2273 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2274 {
2275 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2276 int tag, ret = SCSI_NO_TAG;
2277
2278 BUG_ON(!bqt);
2279 if (!bqt) {
2280 pr_err("Tags are not supported\n");
2281 goto end;
2282 }
2283
2284 do {
2285 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
2286 if (tag >= bqt->max_depth) {
2287 pr_err("Tag allocation failure\n");
2288 goto end;
2289 }
2290 } while (test_and_set_bit(tag, bqt->tag_map));
2291
2292 bqt->tag_index[tag] = sc->request;
2293 sc->request->tag = tag;
2294 sc->tag = tag;
2295 if (!sc->request->special)
2296 sc->request->special = sc;
2297
2298 ret = tag;
2299
2300 end:
2301 return ret;
2302 }
2303
2304 /**
2305 * fnic_scsi_host_end_tag
2306 * frees tag allocated by fnic_scsi_host_start_tag.
2307 **/
2308 static inline void
2309 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2310 {
2311 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2312 int tag = sc->request->tag;
2313
2314 if (tag == SCSI_NO_TAG)
2315 return;
2316
2317 BUG_ON(!bqt || !bqt->tag_index[tag]);
2318 if (!bqt)
2319 return;
2320
2321 bqt->tag_index[tag] = NULL;
2322 clear_bit(tag, bqt->tag_map);
2323
2324 return;
2325 }
2326
2327 /*
2328 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2329 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2330 * on the LUN.
2331 */
2332 int fnic_device_reset(struct scsi_cmnd *sc)
2333 {
2334 struct fc_lport *lp;
2335 struct fnic *fnic;
2336 struct fnic_io_req *io_req = NULL;
2337 struct fc_rport *rport;
2338 int status;
2339 int ret = FAILED;
2340 spinlock_t *io_lock;
2341 unsigned long flags;
2342 unsigned long start_time = 0;
2343 struct scsi_lun fc_lun;
2344 struct fnic_stats *fnic_stats;
2345 struct reset_stats *reset_stats;
2346 int tag = 0;
2347 DECLARE_COMPLETION_ONSTACK(tm_done);
2348 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2349 bool new_sc = 0;
2350
2351 /* Wait for rport to unblock */
2352 fc_block_scsi_eh(sc);
2353
2354 /* Get local-port, check ready and link up */
2355 lp = shost_priv(sc->device->host);
2356
2357 fnic = lport_priv(lp);
2358 fnic_stats = &fnic->fnic_stats;
2359 reset_stats = &fnic->fnic_stats.reset_stats;
2360
2361 atomic64_inc(&reset_stats->device_resets);
2362
2363 rport = starget_to_rport(scsi_target(sc->device));
2364 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2365 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2366 rport->port_id, sc->device->lun, sc);
2367
2368 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2369 goto fnic_device_reset_end;
2370
2371 /* Check if remote port up */
2372 if (fc_remote_port_chkready(rport)) {
2373 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2374 goto fnic_device_reset_end;
2375 }
2376
2377 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2378 /* Allocate tag if not present */
2379
2380 tag = sc->request->tag;
2381 if (unlikely(tag < 0)) {
2382 /*
2383 * XXX(hch): current the midlayer fakes up a struct
2384 * request for the explicit reset ioctls, and those
2385 * don't have a tag allocated to them. The below
2386 * code pokes into midlayer structures to paper over
2387 * this design issue, but that won't work for blk-mq.
2388 *
2389 * Either someone who can actually test the hardware
2390 * will have to come up with a similar hack for the
2391 * blk-mq case, or we'll have to bite the bullet and
2392 * fix the way the EH ioctls work for real, but until
2393 * that happens we fail these explicit requests here.
2394 */
2395
2396 tag = fnic_scsi_host_start_tag(fnic, sc);
2397 if (unlikely(tag == SCSI_NO_TAG))
2398 goto fnic_device_reset_end;
2399 tag_gen_flag = 1;
2400 new_sc = 1;
2401 }
2402 io_lock = fnic_io_lock_hash(fnic, sc);
2403 spin_lock_irqsave(io_lock, flags);
2404 io_req = (struct fnic_io_req *)CMD_SP(sc);
2405
2406 /*
2407 * If there is a io_req attached to this command, then use it,
2408 * else allocate a new one.
2409 */
2410 if (!io_req) {
2411 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2412 if (!io_req) {
2413 spin_unlock_irqrestore(io_lock, flags);
2414 goto fnic_device_reset_end;
2415 }
2416 memset(io_req, 0, sizeof(*io_req));
2417 io_req->port_id = rport->port_id;
2418 CMD_SP(sc) = (char *)io_req;
2419 }
2420 io_req->dr_done = &tm_done;
2421 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2422 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2423 spin_unlock_irqrestore(io_lock, flags);
2424
2425 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2426
2427 /*
2428 * issue the device reset, if enqueue failed, clean up the ioreq
2429 * and break assoc with scsi cmd
2430 */
2431 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2432 spin_lock_irqsave(io_lock, flags);
2433 io_req = (struct fnic_io_req *)CMD_SP(sc);
2434 if (io_req)
2435 io_req->dr_done = NULL;
2436 goto fnic_device_reset_clean;
2437 }
2438 spin_lock_irqsave(io_lock, flags);
2439 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2440 spin_unlock_irqrestore(io_lock, flags);
2441
2442 /*
2443 * Wait on the local completion for LUN reset. The io_req may be
2444 * freed while we wait since we hold no lock.
2445 */
2446 wait_for_completion_timeout(&tm_done,
2447 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2448
2449 spin_lock_irqsave(io_lock, flags);
2450 io_req = (struct fnic_io_req *)CMD_SP(sc);
2451 if (!io_req) {
2452 spin_unlock_irqrestore(io_lock, flags);
2453 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2454 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2455 goto fnic_device_reset_end;
2456 }
2457 io_req->dr_done = NULL;
2458
2459 status = CMD_LR_STATUS(sc);
2460
2461 /*
2462 * If lun reset not completed, bail out with failed. io_req
2463 * gets cleaned up during higher levels of EH
2464 */
2465 if (status == FCPIO_INVALID_CODE) {
2466 atomic64_inc(&reset_stats->device_reset_timeouts);
2467 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2468 "Device reset timed out\n");
2469 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2470 spin_unlock_irqrestore(io_lock, flags);
2471 int_to_scsilun(sc->device->lun, &fc_lun);
2472 /*
2473 * Issue abort and terminate on device reset request.
2474 * If q'ing of terminate fails, retry it after a delay.
2475 */
2476 while (1) {
2477 spin_lock_irqsave(io_lock, flags);
2478 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2479 spin_unlock_irqrestore(io_lock, flags);
2480 break;
2481 }
2482 spin_unlock_irqrestore(io_lock, flags);
2483 if (fnic_queue_abort_io_req(fnic,
2484 tag | FNIC_TAG_DEV_RST,
2485 FCPIO_ITMF_ABT_TASK_TERM,
2486 fc_lun.scsi_lun, io_req)) {
2487 wait_for_completion_timeout(&tm_done,
2488 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2489 } else {
2490 spin_lock_irqsave(io_lock, flags);
2491 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2492 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2493 io_req->abts_done = &tm_done;
2494 spin_unlock_irqrestore(io_lock, flags);
2495 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2496 "Abort and terminate issued on Device reset "
2497 "tag 0x%x sc 0x%p\n", tag, sc);
2498 break;
2499 }
2500 }
2501 while (1) {
2502 spin_lock_irqsave(io_lock, flags);
2503 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2504 spin_unlock_irqrestore(io_lock, flags);
2505 wait_for_completion_timeout(&tm_done,
2506 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2507 break;
2508 } else {
2509 io_req = (struct fnic_io_req *)CMD_SP(sc);
2510 io_req->abts_done = NULL;
2511 goto fnic_device_reset_clean;
2512 }
2513 }
2514 } else {
2515 spin_unlock_irqrestore(io_lock, flags);
2516 }
2517
2518 /* Completed, but not successful, clean up the io_req, return fail */
2519 if (status != FCPIO_SUCCESS) {
2520 spin_lock_irqsave(io_lock, flags);
2521 FNIC_SCSI_DBG(KERN_DEBUG,
2522 fnic->lport->host,
2523 "Device reset completed - failed\n");
2524 io_req = (struct fnic_io_req *)CMD_SP(sc);
2525 goto fnic_device_reset_clean;
2526 }
2527
2528 /*
2529 * Clean up any aborts on this lun that have still not
2530 * completed. If any of these fail, then LUN reset fails.
2531 * clean_pending_aborts cleans all cmds on this lun except
2532 * the lun reset cmd. If all cmds get cleaned, the lun reset
2533 * succeeds
2534 */
2535 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
2536 spin_lock_irqsave(io_lock, flags);
2537 io_req = (struct fnic_io_req *)CMD_SP(sc);
2538 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2539 "Device reset failed"
2540 " since could not abort all IOs\n");
2541 goto fnic_device_reset_clean;
2542 }
2543
2544 /* Clean lun reset command */
2545 spin_lock_irqsave(io_lock, flags);
2546 io_req = (struct fnic_io_req *)CMD_SP(sc);
2547 if (io_req)
2548 /* Completed, and successful */
2549 ret = SUCCESS;
2550
2551 fnic_device_reset_clean:
2552 if (io_req)
2553 CMD_SP(sc) = NULL;
2554
2555 spin_unlock_irqrestore(io_lock, flags);
2556
2557 if (io_req) {
2558 start_time = io_req->start_time;
2559 fnic_release_ioreq_buf(fnic, io_req, sc);
2560 mempool_free(io_req, fnic->io_req_pool);
2561 }
2562
2563 fnic_device_reset_end:
2564 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2565 sc->request->tag, sc,
2566 jiffies_to_msecs(jiffies - start_time),
2567 0, ((u64)sc->cmnd[0] << 32 |
2568 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2569 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2570 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2571
2572 /* free tag if it is allocated */
2573 if (unlikely(tag_gen_flag))
2574 fnic_scsi_host_end_tag(fnic, sc);
2575
2576 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2577 "Returning from device reset %s\n",
2578 (ret == SUCCESS) ?
2579 "SUCCESS" : "FAILED");
2580
2581 if (ret == FAILED)
2582 atomic64_inc(&reset_stats->device_reset_failures);
2583
2584 return ret;
2585 }
2586
2587 /* Clean up all IOs, clean up libFC local port */
2588 int fnic_reset(struct Scsi_Host *shost)
2589 {
2590 struct fc_lport *lp;
2591 struct fnic *fnic;
2592 int ret = 0;
2593 struct reset_stats *reset_stats;
2594
2595 lp = shost_priv(shost);
2596 fnic = lport_priv(lp);
2597 reset_stats = &fnic->fnic_stats.reset_stats;
2598
2599 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2600 "fnic_reset called\n");
2601
2602 atomic64_inc(&reset_stats->fnic_resets);
2603
2604 /*
2605 * Reset local port, this will clean up libFC exchanges,
2606 * reset remote port sessions, and if link is up, begin flogi
2607 */
2608 ret = fc_lport_reset(lp);
2609
2610 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2611 "Returning from fnic reset %s\n",
2612 (ret == 0) ?
2613 "SUCCESS" : "FAILED");
2614
2615 if (ret == 0)
2616 atomic64_inc(&reset_stats->fnic_reset_completions);
2617 else
2618 atomic64_inc(&reset_stats->fnic_reset_failures);
2619
2620 return ret;
2621 }
2622
2623 /*
2624 * SCSI Error handling calls driver's eh_host_reset if all prior
2625 * error handling levels return FAILED. If host reset completes
2626 * successfully, and if link is up, then Fabric login begins.
2627 *
2628 * Host Reset is the highest level of error recovery. If this fails, then
2629 * host is offlined by SCSI.
2630 *
2631 */
2632 int fnic_host_reset(struct scsi_cmnd *sc)
2633 {
2634 int ret;
2635 unsigned long wait_host_tmo;
2636 struct Scsi_Host *shost = sc->device->host;
2637 struct fc_lport *lp = shost_priv(shost);
2638 struct fnic *fnic = lport_priv(lp);
2639 unsigned long flags;
2640
2641 spin_lock_irqsave(&fnic->fnic_lock, flags);
2642 if (fnic->internal_reset_inprogress == 0) {
2643 fnic->internal_reset_inprogress = 1;
2644 } else {
2645 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2646 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2647 "host reset in progress skipping another host reset\n");
2648 return SUCCESS;
2649 }
2650 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2651
2652 /*
2653 * If fnic_reset is successful, wait for fabric login to complete
2654 * scsi-ml tries to send a TUR to every device if host reset is
2655 * successful, so before returning to scsi, fabric should be up
2656 */
2657 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2658 if (ret == SUCCESS) {
2659 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2660 ret = FAILED;
2661 while (time_before(jiffies, wait_host_tmo)) {
2662 if ((lp->state == LPORT_ST_READY) &&
2663 (lp->link_up)) {
2664 ret = SUCCESS;
2665 break;
2666 }
2667 ssleep(1);
2668 }
2669 }
2670
2671 spin_lock_irqsave(&fnic->fnic_lock, flags);
2672 fnic->internal_reset_inprogress = 0;
2673 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2674 return ret;
2675 }
2676
2677 /*
2678 * This fxn is called from libFC when host is removed
2679 */
2680 void fnic_scsi_abort_io(struct fc_lport *lp)
2681 {
2682 int err = 0;
2683 unsigned long flags;
2684 enum fnic_state old_state;
2685 struct fnic *fnic = lport_priv(lp);
2686 DECLARE_COMPLETION_ONSTACK(remove_wait);
2687
2688 /* Issue firmware reset for fnic, wait for reset to complete */
2689 retry_fw_reset:
2690 spin_lock_irqsave(&fnic->fnic_lock, flags);
2691 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2692 /* fw reset is in progress, poll for its completion */
2693 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2694 schedule_timeout(msecs_to_jiffies(100));
2695 goto retry_fw_reset;
2696 }
2697
2698 fnic->remove_wait = &remove_wait;
2699 old_state = fnic->state;
2700 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2701 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2702 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2703
2704 err = fnic_fw_reset_handler(fnic);
2705 if (err) {
2706 spin_lock_irqsave(&fnic->fnic_lock, flags);
2707 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2708 fnic->state = old_state;
2709 fnic->remove_wait = NULL;
2710 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2711 return;
2712 }
2713
2714 /* Wait for firmware reset to complete */
2715 wait_for_completion_timeout(&remove_wait,
2716 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2717
2718 spin_lock_irqsave(&fnic->fnic_lock, flags);
2719 fnic->remove_wait = NULL;
2720 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2721 "fnic_scsi_abort_io %s\n",
2722 (fnic->state == FNIC_IN_ETH_MODE) ?
2723 "SUCCESS" : "FAILED");
2724 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2725
2726 }
2727
2728 /*
2729 * This fxn called from libFC to clean up driver IO state on link down
2730 */
2731 void fnic_scsi_cleanup(struct fc_lport *lp)
2732 {
2733 unsigned long flags;
2734 enum fnic_state old_state;
2735 struct fnic *fnic = lport_priv(lp);
2736
2737 /* issue fw reset */
2738 retry_fw_reset:
2739 spin_lock_irqsave(&fnic->fnic_lock, flags);
2740 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2741 /* fw reset is in progress, poll for its completion */
2742 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2743 schedule_timeout(msecs_to_jiffies(100));
2744 goto retry_fw_reset;
2745 }
2746 old_state = fnic->state;
2747 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2748 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2749 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2750
2751 if (fnic_fw_reset_handler(fnic)) {
2752 spin_lock_irqsave(&fnic->fnic_lock, flags);
2753 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2754 fnic->state = old_state;
2755 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2756 }
2757
2758 }
2759
2760 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2761 {
2762 }
2763
2764 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2765 {
2766 struct fnic *fnic = lport_priv(lp);
2767
2768 /* Non-zero sid, nothing to do */
2769 if (sid)
2770 goto call_fc_exch_mgr_reset;
2771
2772 if (did) {
2773 fnic_rport_exch_reset(fnic, did);
2774 goto call_fc_exch_mgr_reset;
2775 }
2776
2777 /*
2778 * sid = 0, did = 0
2779 * link down or device being removed
2780 */
2781 if (!fnic->in_remove)
2782 fnic_scsi_cleanup(lp);
2783 else
2784 fnic_scsi_abort_io(lp);
2785
2786 /* call libFC exch mgr reset to reset its exchanges */
2787 call_fc_exch_mgr_reset:
2788 fc_exch_mgr_reset(lp, sid, did);
2789
2790 }
2791
2792 /*
2793 * fnic_is_abts_pending() is a helper function that
2794 * walks through tag map to check if there is any IOs pending,if there is one,
2795 * then it returns 1 (true), otherwise 0 (false)
2796 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2797 * otherwise, it checks for all IOs.
2798 */
2799 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2800 {
2801 int tag;
2802 struct fnic_io_req *io_req;
2803 spinlock_t *io_lock;
2804 unsigned long flags;
2805 int ret = 0;
2806 struct scsi_cmnd *sc;
2807 struct scsi_device *lun_dev = NULL;
2808
2809 if (lr_sc)
2810 lun_dev = lr_sc->device;
2811
2812 /* walk again to check, if IOs are still pending in fw */
2813 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2814 sc = scsi_host_find_tag(fnic->lport->host, tag);
2815 /*
2816 * ignore this lun reset cmd or cmds that do not belong to
2817 * this lun
2818 */
2819 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2820 continue;
2821
2822 io_lock = fnic_io_lock_hash(fnic, sc);
2823 spin_lock_irqsave(io_lock, flags);
2824
2825 io_req = (struct fnic_io_req *)CMD_SP(sc);
2826
2827 if (!io_req || sc->device != lun_dev) {
2828 spin_unlock_irqrestore(io_lock, flags);
2829 continue;
2830 }
2831
2832 /*
2833 * Found IO that is still pending with firmware and
2834 * belongs to the LUN that we are resetting
2835 */
2836 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2837 "Found IO in %s on lun\n",
2838 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2839
2840 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2841 ret = 1;
2842 spin_unlock_irqrestore(io_lock, flags);
2843 }
2844
2845 return ret;
2846 }
Linux with added FPC-III support