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