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Merge branch 'fix/rt5645' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
[deliverable/linux.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/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
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 = pci_map_single
345 (fnic->pdev,
346 io_req->sgl_list,
347 sizeof(io_req->sgl_list[0]) * sg_count,
348 PCI_DMA_TODEVICE);
349 }
350
351 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
352 sc->sense_buffer,
353 SCSI_SENSE_BUFFERSIZE,
354 PCI_DMA_FROMDEVICE);
355
356 int_to_scsilun(sc->device->lun, &fc_lun);
357
358 /* Enqueue the descriptor in the Copy WQ */
359 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
360
361 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
362 free_wq_copy_descs(fnic, wq);
363
364 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
365 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
366 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
367 "fnic_queue_wq_copy_desc failure - no descriptors\n");
368 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
369 return SCSI_MLQUEUE_HOST_BUSY;
370 }
371
372 flags = 0;
373 if (sc->sc_data_direction == DMA_FROM_DEVICE)
374 flags = FCPIO_ICMND_RDDATA;
375 else if (sc->sc_data_direction == DMA_TO_DEVICE)
376 flags = FCPIO_ICMND_WRDATA;
377
378 exch_flags = 0;
379 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
380 (rp->flags & FC_RP_FLAGS_RETRY))
381 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
382
383 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
384 0, exch_flags, io_req->sgl_cnt,
385 SCSI_SENSE_BUFFERSIZE,
386 io_req->sgl_list_pa,
387 io_req->sense_buf_pa,
388 0, /* scsi cmd ref, always 0 */
389 FCPIO_ICMND_PTA_SIMPLE,
390 /* scsi pri and tag */
391 flags, /* command flags */
392 sc->cmnd, sc->cmd_len,
393 scsi_bufflen(sc),
394 fc_lun.scsi_lun, io_req->port_id,
395 rport->maxframe_size, rp->r_a_tov,
396 rp->e_d_tov);
397
398 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
399 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
400 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
401 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
402 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
403
404 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
405 return 0;
406 }
407
408 /*
409 * fnic_queuecommand
410 * Routine to send a scsi cdb
411 * Called with host_lock held and interrupts disabled.
412 */
413 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
414 {
415 struct fc_lport *lp = shost_priv(sc->device->host);
416 struct fc_rport *rport;
417 struct fnic_io_req *io_req = NULL;
418 struct fnic *fnic = lport_priv(lp);
419 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
420 struct vnic_wq_copy *wq;
421 int ret;
422 u64 cmd_trace;
423 int sg_count = 0;
424 unsigned long flags = 0;
425 unsigned long ptr;
426 struct fc_rport_priv *rdata;
427 spinlock_t *io_lock = NULL;
428 int io_lock_acquired = 0;
429
430 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
431 return SCSI_MLQUEUE_HOST_BUSY;
432
433 rport = starget_to_rport(scsi_target(sc->device));
434 ret = fc_remote_port_chkready(rport);
435 if (ret) {
436 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
437 sc->result = ret;
438 done(sc);
439 return 0;
440 }
441
442 rdata = lp->tt.rport_lookup(lp, rport->port_id);
443 if (!rdata || (rdata->rp_state == RPORT_ST_DELETE)) {
444 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
445 "returning IO as rport is removed\n");
446 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
447 sc->result = DID_NO_CONNECT;
448 done(sc);
449 return 0;
450 }
451
452 if (lp->state != LPORT_ST_READY || !(lp->link_up))
453 return SCSI_MLQUEUE_HOST_BUSY;
454
455 atomic_inc(&fnic->in_flight);
456
457 /*
458 * Release host lock, use driver resource specific locks from here.
459 * Don't re-enable interrupts in case they were disabled prior to the
460 * caller disabling them.
461 */
462 spin_unlock(lp->host->host_lock);
463 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
464 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
465
466 /* Get a new io_req for this SCSI IO */
467 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
468 if (!io_req) {
469 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
470 ret = SCSI_MLQUEUE_HOST_BUSY;
471 goto out;
472 }
473 memset(io_req, 0, sizeof(*io_req));
474
475 /* Map the data buffer */
476 sg_count = scsi_dma_map(sc);
477 if (sg_count < 0) {
478 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
479 sc->request->tag, sc, 0, sc->cmnd[0],
480 sg_count, CMD_STATE(sc));
481 mempool_free(io_req, fnic->io_req_pool);
482 goto out;
483 }
484
485 /* Determine the type of scatter/gather list we need */
486 io_req->sgl_cnt = sg_count;
487 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
488 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
489 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
490
491 if (sg_count) {
492 io_req->sgl_list =
493 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
494 GFP_ATOMIC);
495 if (!io_req->sgl_list) {
496 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
497 ret = SCSI_MLQUEUE_HOST_BUSY;
498 scsi_dma_unmap(sc);
499 mempool_free(io_req, fnic->io_req_pool);
500 goto out;
501 }
502
503 /* Cache sgl list allocated address before alignment */
504 io_req->sgl_list_alloc = io_req->sgl_list;
505 ptr = (unsigned long) io_req->sgl_list;
506 if (ptr % FNIC_SG_DESC_ALIGN) {
507 io_req->sgl_list = (struct host_sg_desc *)
508 (((unsigned long) ptr
509 + FNIC_SG_DESC_ALIGN - 1)
510 & ~(FNIC_SG_DESC_ALIGN - 1));
511 }
512 }
513
514 /*
515 * Will acquire lock defore setting to IO initialized.
516 */
517
518 io_lock = fnic_io_lock_hash(fnic, sc);
519 spin_lock_irqsave(io_lock, flags);
520
521 /* initialize rest of io_req */
522 io_lock_acquired = 1;
523 io_req->port_id = rport->port_id;
524 io_req->start_time = jiffies;
525 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
526 CMD_SP(sc) = (char *)io_req;
527 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
528 sc->scsi_done = done;
529
530 /* create copy wq desc and enqueue it */
531 wq = &fnic->wq_copy[0];
532 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
533 if (ret) {
534 /*
535 * In case another thread cancelled the request,
536 * refetch the pointer under the lock.
537 */
538 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
539 sc->request->tag, sc, 0, 0, 0,
540 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
541 io_req = (struct fnic_io_req *)CMD_SP(sc);
542 CMD_SP(sc) = NULL;
543 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
544 spin_unlock_irqrestore(io_lock, flags);
545 if (io_req) {
546 fnic_release_ioreq_buf(fnic, io_req, sc);
547 mempool_free(io_req, fnic->io_req_pool);
548 }
549 atomic_dec(&fnic->in_flight);
550 /* acquire host lock before returning to SCSI */
551 spin_lock(lp->host->host_lock);
552 return ret;
553 } else {
554 atomic64_inc(&fnic_stats->io_stats.active_ios);
555 atomic64_inc(&fnic_stats->io_stats.num_ios);
556 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
557 atomic64_read(&fnic_stats->io_stats.max_active_ios))
558 atomic64_set(&fnic_stats->io_stats.max_active_ios,
559 atomic64_read(&fnic_stats->io_stats.active_ios));
560
561 /* REVISIT: Use per IO lock in the final code */
562 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
563 }
564 out:
565 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
566 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
567 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
568 sc->cmnd[5]);
569
570 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
571 sc->request->tag, sc, io_req,
572 sg_count, cmd_trace,
573 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
574
575 /* if only we issued IO, will we have the io lock */
576 if (io_lock_acquired)
577 spin_unlock_irqrestore(io_lock, flags);
578
579 atomic_dec(&fnic->in_flight);
580 /* acquire host lock before returning to SCSI */
581 spin_lock(lp->host->host_lock);
582 return ret;
583 }
584
585 DEF_SCSI_QCMD(fnic_queuecommand)
586
587 /*
588 * fnic_fcpio_fw_reset_cmpl_handler
589 * Routine to handle fw reset completion
590 */
591 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
592 struct fcpio_fw_req *desc)
593 {
594 u8 type;
595 u8 hdr_status;
596 struct fcpio_tag tag;
597 int ret = 0;
598 unsigned long flags;
599 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
600
601 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
602
603 atomic64_inc(&reset_stats->fw_reset_completions);
604
605 /* Clean up all outstanding io requests */
606 fnic_cleanup_io(fnic, SCSI_NO_TAG);
607
608 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
609 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
610
611 spin_lock_irqsave(&fnic->fnic_lock, flags);
612
613 /* fnic should be in FC_TRANS_ETH_MODE */
614 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
615 /* Check status of reset completion */
616 if (!hdr_status) {
617 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
618 "reset cmpl success\n");
619 /* Ready to send flogi out */
620 fnic->state = FNIC_IN_ETH_MODE;
621 } else {
622 FNIC_SCSI_DBG(KERN_DEBUG,
623 fnic->lport->host,
624 "fnic fw_reset : failed %s\n",
625 fnic_fcpio_status_to_str(hdr_status));
626
627 /*
628 * Unable to change to eth mode, cannot send out flogi
629 * Change state to fc mode, so that subsequent Flogi
630 * requests from libFC will cause more attempts to
631 * reset the firmware. Free the cached flogi
632 */
633 fnic->state = FNIC_IN_FC_MODE;
634 atomic64_inc(&reset_stats->fw_reset_failures);
635 ret = -1;
636 }
637 } else {
638 FNIC_SCSI_DBG(KERN_DEBUG,
639 fnic->lport->host,
640 "Unexpected state %s while processing"
641 " reset cmpl\n", fnic_state_to_str(fnic->state));
642 atomic64_inc(&reset_stats->fw_reset_failures);
643 ret = -1;
644 }
645
646 /* Thread removing device blocks till firmware reset is complete */
647 if (fnic->remove_wait)
648 complete(fnic->remove_wait);
649
650 /*
651 * If fnic is being removed, or fw reset failed
652 * free the flogi frame. Else, send it out
653 */
654 if (fnic->remove_wait || ret) {
655 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
656 skb_queue_purge(&fnic->tx_queue);
657 goto reset_cmpl_handler_end;
658 }
659
660 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
661
662 fnic_flush_tx(fnic);
663
664 reset_cmpl_handler_end:
665 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
666
667 return ret;
668 }
669
670 /*
671 * fnic_fcpio_flogi_reg_cmpl_handler
672 * Routine to handle flogi register completion
673 */
674 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
675 struct fcpio_fw_req *desc)
676 {
677 u8 type;
678 u8 hdr_status;
679 struct fcpio_tag tag;
680 int ret = 0;
681 unsigned long flags;
682
683 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
684
685 /* Update fnic state based on status of flogi reg completion */
686 spin_lock_irqsave(&fnic->fnic_lock, flags);
687
688 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
689
690 /* Check flogi registration completion status */
691 if (!hdr_status) {
692 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
693 "flog reg succeeded\n");
694 fnic->state = FNIC_IN_FC_MODE;
695 } else {
696 FNIC_SCSI_DBG(KERN_DEBUG,
697 fnic->lport->host,
698 "fnic flogi reg :failed %s\n",
699 fnic_fcpio_status_to_str(hdr_status));
700 fnic->state = FNIC_IN_ETH_MODE;
701 ret = -1;
702 }
703 } else {
704 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
705 "Unexpected fnic state %s while"
706 " processing flogi reg completion\n",
707 fnic_state_to_str(fnic->state));
708 ret = -1;
709 }
710
711 if (!ret) {
712 if (fnic->stop_rx_link_events) {
713 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
714 goto reg_cmpl_handler_end;
715 }
716 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
717
718 fnic_flush_tx(fnic);
719 queue_work(fnic_event_queue, &fnic->frame_work);
720 } else {
721 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
722 }
723
724 reg_cmpl_handler_end:
725 return ret;
726 }
727
728 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
729 u16 request_out)
730 {
731 if (wq->to_clean_index <= wq->to_use_index) {
732 /* out of range, stale request_out index */
733 if (request_out < wq->to_clean_index ||
734 request_out >= wq->to_use_index)
735 return 0;
736 } else {
737 /* out of range, stale request_out index */
738 if (request_out < wq->to_clean_index &&
739 request_out >= wq->to_use_index)
740 return 0;
741 }
742 /* request_out index is in range */
743 return 1;
744 }
745
746
747 /*
748 * Mark that ack received and store the Ack index. If there are multiple
749 * acks received before Tx thread cleans it up, the latest value will be
750 * used which is correct behavior. This state should be in the copy Wq
751 * instead of in the fnic
752 */
753 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
754 unsigned int cq_index,
755 struct fcpio_fw_req *desc)
756 {
757 struct vnic_wq_copy *wq;
758 u16 request_out = desc->u.ack.request_out;
759 unsigned long flags;
760 u64 *ox_id_tag = (u64 *)(void *)desc;
761
762 /* mark the ack state */
763 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
764 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
765
766 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
767 if (is_ack_index_in_range(wq, request_out)) {
768 fnic->fw_ack_index[0] = request_out;
769 fnic->fw_ack_recd[0] = 1;
770 } else
771 atomic64_inc(
772 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
773
774 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
775 FNIC_TRACE(fnic_fcpio_ack_handler,
776 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
777 ox_id_tag[4], ox_id_tag[5]);
778 }
779
780 /*
781 * fnic_fcpio_icmnd_cmpl_handler
782 * Routine to handle icmnd completions
783 */
784 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
785 struct fcpio_fw_req *desc)
786 {
787 u8 type;
788 u8 hdr_status;
789 struct fcpio_tag tag;
790 u32 id;
791 u64 xfer_len = 0;
792 struct fcpio_icmnd_cmpl *icmnd_cmpl;
793 struct fnic_io_req *io_req;
794 struct scsi_cmnd *sc;
795 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
796 unsigned long flags;
797 spinlock_t *io_lock;
798 u64 cmd_trace;
799 unsigned long start_time;
800
801 /* Decode the cmpl description to get the io_req id */
802 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
803 fcpio_tag_id_dec(&tag, &id);
804 icmnd_cmpl = &desc->u.icmnd_cmpl;
805
806 if (id >= fnic->fnic_max_tag_id) {
807 shost_printk(KERN_ERR, fnic->lport->host,
808 "Tag out of range tag %x hdr status = %s\n",
809 id, fnic_fcpio_status_to_str(hdr_status));
810 return;
811 }
812
813 sc = scsi_host_find_tag(fnic->lport->host, id);
814 WARN_ON_ONCE(!sc);
815 if (!sc) {
816 atomic64_inc(&fnic_stats->io_stats.sc_null);
817 shost_printk(KERN_ERR, fnic->lport->host,
818 "icmnd_cmpl sc is null - "
819 "hdr status = %s tag = 0x%x desc = 0x%p\n",
820 fnic_fcpio_status_to_str(hdr_status), id, desc);
821 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
822 fnic->lport->host->host_no, id,
823 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
824 (u64)icmnd_cmpl->_resvd0[0]),
825 ((u64)hdr_status << 16 |
826 (u64)icmnd_cmpl->scsi_status << 8 |
827 (u64)icmnd_cmpl->flags), desc,
828 (u64)icmnd_cmpl->residual, 0);
829 return;
830 }
831
832 io_lock = fnic_io_lock_hash(fnic, sc);
833 spin_lock_irqsave(io_lock, flags);
834 io_req = (struct fnic_io_req *)CMD_SP(sc);
835 WARN_ON_ONCE(!io_req);
836 if (!io_req) {
837 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
838 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
839 spin_unlock_irqrestore(io_lock, flags);
840 shost_printk(KERN_ERR, fnic->lport->host,
841 "icmnd_cmpl io_req is null - "
842 "hdr status = %s tag = 0x%x sc 0x%p\n",
843 fnic_fcpio_status_to_str(hdr_status), id, sc);
844 return;
845 }
846 start_time = io_req->start_time;
847
848 /* firmware completed the io */
849 io_req->io_completed = 1;
850
851 /*
852 * if SCSI-ML has already issued abort on this command,
853 * ignore completion of the IO. The abts path will clean it up
854 */
855 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
856 spin_unlock_irqrestore(io_lock, flags);
857 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
858 switch (hdr_status) {
859 case FCPIO_SUCCESS:
860 CMD_FLAGS(sc) |= FNIC_IO_DONE;
861 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
862 "icmnd_cmpl ABTS pending hdr status = %s "
863 "sc 0x%p scsi_status %x residual %d\n",
864 fnic_fcpio_status_to_str(hdr_status), sc,
865 icmnd_cmpl->scsi_status,
866 icmnd_cmpl->residual);
867 break;
868 case FCPIO_ABORTED:
869 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
870 break;
871 default:
872 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
873 "icmnd_cmpl abts pending "
874 "hdr status = %s tag = 0x%x sc = 0x%p\n",
875 fnic_fcpio_status_to_str(hdr_status),
876 id, sc);
877 break;
878 }
879 return;
880 }
881
882 /* Mark the IO as complete */
883 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
884
885 icmnd_cmpl = &desc->u.icmnd_cmpl;
886
887 switch (hdr_status) {
888 case FCPIO_SUCCESS:
889 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
890 xfer_len = scsi_bufflen(sc);
891 scsi_set_resid(sc, icmnd_cmpl->residual);
892
893 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
894 xfer_len -= icmnd_cmpl->residual;
895
896 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
897 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
898 break;
899
900 case FCPIO_TIMEOUT: /* request was timed out */
901 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
902 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
903 break;
904
905 case FCPIO_ABORTED: /* request was aborted */
906 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
907 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
908 break;
909
910 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
911 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
912 scsi_set_resid(sc, icmnd_cmpl->residual);
913 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
914 break;
915
916 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
917 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
918 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
919 break;
920
921 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
922 atomic64_inc(&fnic_stats->io_stats.io_not_found);
923 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
924 break;
925
926 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
927 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
928 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
929 break;
930
931 case FCPIO_FW_ERR: /* request was terminated due fw error */
932 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
933 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
934 break;
935
936 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
937 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
938 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
939 break;
940
941 case FCPIO_INVALID_HEADER: /* header contains invalid data */
942 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
943 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
944 default:
945 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
946 fnic_fcpio_status_to_str(hdr_status));
947 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
948 break;
949 }
950
951 if (hdr_status != FCPIO_SUCCESS) {
952 atomic64_inc(&fnic_stats->io_stats.io_failures);
953 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
954 fnic_fcpio_status_to_str(hdr_status));
955 }
956 /* Break link with the SCSI command */
957 CMD_SP(sc) = NULL;
958 CMD_FLAGS(sc) |= FNIC_IO_DONE;
959
960 spin_unlock_irqrestore(io_lock, flags);
961
962 fnic_release_ioreq_buf(fnic, io_req, sc);
963
964 mempool_free(io_req, fnic->io_req_pool);
965
966 cmd_trace = ((u64)hdr_status << 56) |
967 (u64)icmnd_cmpl->scsi_status << 48 |
968 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
969 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
970 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
971
972 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
973 sc->device->host->host_no, id, sc,
974 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
975 (u64)icmnd_cmpl->_resvd0[0] << 48 |
976 jiffies_to_msecs(jiffies - start_time)),
977 desc, cmd_trace,
978 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
979
980 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
981 fnic->lport->host_stats.fcp_input_requests++;
982 fnic->fcp_input_bytes += xfer_len;
983 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
984 fnic->lport->host_stats.fcp_output_requests++;
985 fnic->fcp_output_bytes += xfer_len;
986 } else
987 fnic->lport->host_stats.fcp_control_requests++;
988
989 atomic64_dec(&fnic_stats->io_stats.active_ios);
990 if (atomic64_read(&fnic->io_cmpl_skip))
991 atomic64_dec(&fnic->io_cmpl_skip);
992 else
993 atomic64_inc(&fnic_stats->io_stats.io_completions);
994
995 /* Call SCSI completion function to complete the IO */
996 if (sc->scsi_done)
997 sc->scsi_done(sc);
998 }
999
1000 /* fnic_fcpio_itmf_cmpl_handler
1001 * Routine to handle itmf completions
1002 */
1003 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1004 struct fcpio_fw_req *desc)
1005 {
1006 u8 type;
1007 u8 hdr_status;
1008 struct fcpio_tag tag;
1009 u32 id;
1010 struct scsi_cmnd *sc;
1011 struct fnic_io_req *io_req;
1012 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1013 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1014 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1015 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1016 unsigned long flags;
1017 spinlock_t *io_lock;
1018 unsigned long start_time;
1019
1020 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1021 fcpio_tag_id_dec(&tag, &id);
1022
1023 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1024 shost_printk(KERN_ERR, fnic->lport->host,
1025 "Tag out of range tag %x hdr status = %s\n",
1026 id, fnic_fcpio_status_to_str(hdr_status));
1027 return;
1028 }
1029
1030 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1031 WARN_ON_ONCE(!sc);
1032 if (!sc) {
1033 atomic64_inc(&fnic_stats->io_stats.sc_null);
1034 shost_printk(KERN_ERR, fnic->lport->host,
1035 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1036 fnic_fcpio_status_to_str(hdr_status), id);
1037 return;
1038 }
1039 io_lock = fnic_io_lock_hash(fnic, sc);
1040 spin_lock_irqsave(io_lock, flags);
1041 io_req = (struct fnic_io_req *)CMD_SP(sc);
1042 WARN_ON_ONCE(!io_req);
1043 if (!io_req) {
1044 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1045 spin_unlock_irqrestore(io_lock, flags);
1046 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1047 shost_printk(KERN_ERR, fnic->lport->host,
1048 "itmf_cmpl io_req is null - "
1049 "hdr status = %s tag = 0x%x sc 0x%p\n",
1050 fnic_fcpio_status_to_str(hdr_status), id, sc);
1051 return;
1052 }
1053 start_time = io_req->start_time;
1054
1055 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1056 /* Abort and terminate completion of device reset req */
1057 /* REVISIT : Add asserts about various flags */
1058 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1059 "dev reset abts cmpl recd. id %x status %s\n",
1060 id, fnic_fcpio_status_to_str(hdr_status));
1061 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1062 CMD_ABTS_STATUS(sc) = hdr_status;
1063 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1064 if (io_req->abts_done)
1065 complete(io_req->abts_done);
1066 spin_unlock_irqrestore(io_lock, flags);
1067 } else if (id & FNIC_TAG_ABORT) {
1068 /* Completion of abort cmd */
1069 switch (hdr_status) {
1070 case FCPIO_SUCCESS:
1071 break;
1072 case FCPIO_TIMEOUT:
1073 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1074 atomic64_inc(&abts_stats->abort_fw_timeouts);
1075 else
1076 atomic64_inc(
1077 &term_stats->terminate_fw_timeouts);
1078 break;
1079 case FCPIO_IO_NOT_FOUND:
1080 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1081 atomic64_inc(&abts_stats->abort_io_not_found);
1082 else
1083 atomic64_inc(
1084 &term_stats->terminate_io_not_found);
1085 break;
1086 default:
1087 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1088 atomic64_inc(&abts_stats->abort_failures);
1089 else
1090 atomic64_inc(
1091 &term_stats->terminate_failures);
1092 break;
1093 }
1094 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1095 /* This is a late completion. Ignore it */
1096 spin_unlock_irqrestore(io_lock, flags);
1097 return;
1098 }
1099 CMD_ABTS_STATUS(sc) = hdr_status;
1100 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1101
1102 atomic64_dec(&fnic_stats->io_stats.active_ios);
1103 if (atomic64_read(&fnic->io_cmpl_skip))
1104 atomic64_dec(&fnic->io_cmpl_skip);
1105 else
1106 atomic64_inc(&fnic_stats->io_stats.io_completions);
1107
1108 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1109 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1110
1111 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1112 "abts cmpl recd. id %d status %s\n",
1113 (int)(id & FNIC_TAG_MASK),
1114 fnic_fcpio_status_to_str(hdr_status));
1115
1116 /*
1117 * If scsi_eh thread is blocked waiting for abts to complete,
1118 * signal completion to it. IO will be cleaned in the thread
1119 * else clean it in this context
1120 */
1121 if (io_req->abts_done) {
1122 complete(io_req->abts_done);
1123 spin_unlock_irqrestore(io_lock, flags);
1124 } else {
1125 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1126 "abts cmpl, completing IO\n");
1127 CMD_SP(sc) = NULL;
1128 sc->result = (DID_ERROR << 16);
1129
1130 spin_unlock_irqrestore(io_lock, flags);
1131
1132 fnic_release_ioreq_buf(fnic, io_req, sc);
1133 mempool_free(io_req, fnic->io_req_pool);
1134 if (sc->scsi_done) {
1135 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1136 sc->device->host->host_no, id,
1137 sc,
1138 jiffies_to_msecs(jiffies - start_time),
1139 desc,
1140 (((u64)hdr_status << 40) |
1141 (u64)sc->cmnd[0] << 32 |
1142 (u64)sc->cmnd[2] << 24 |
1143 (u64)sc->cmnd[3] << 16 |
1144 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1145 (((u64)CMD_FLAGS(sc) << 32) |
1146 CMD_STATE(sc)));
1147 sc->scsi_done(sc);
1148 }
1149 }
1150
1151 } else if (id & FNIC_TAG_DEV_RST) {
1152 /* Completion of device reset */
1153 CMD_LR_STATUS(sc) = hdr_status;
1154 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1155 spin_unlock_irqrestore(io_lock, flags);
1156 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1157 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1158 sc->device->host->host_no, id, sc,
1159 jiffies_to_msecs(jiffies - start_time),
1160 desc, 0,
1161 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1162 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1163 "Terminate pending "
1164 "dev reset cmpl recd. id %d status %s\n",
1165 (int)(id & FNIC_TAG_MASK),
1166 fnic_fcpio_status_to_str(hdr_status));
1167 return;
1168 }
1169 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1170 /* Need to wait for terminate completion */
1171 spin_unlock_irqrestore(io_lock, flags);
1172 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1173 sc->device->host->host_no, id, sc,
1174 jiffies_to_msecs(jiffies - start_time),
1175 desc, 0,
1176 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1177 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1178 "dev reset cmpl recd after time out. "
1179 "id %d status %s\n",
1180 (int)(id & FNIC_TAG_MASK),
1181 fnic_fcpio_status_to_str(hdr_status));
1182 return;
1183 }
1184 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1185 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1186 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1187 "dev reset cmpl recd. id %d status %s\n",
1188 (int)(id & FNIC_TAG_MASK),
1189 fnic_fcpio_status_to_str(hdr_status));
1190 if (io_req->dr_done)
1191 complete(io_req->dr_done);
1192 spin_unlock_irqrestore(io_lock, flags);
1193
1194 } else {
1195 shost_printk(KERN_ERR, fnic->lport->host,
1196 "Unexpected itmf io state %s tag %x\n",
1197 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1198 spin_unlock_irqrestore(io_lock, flags);
1199 }
1200
1201 }
1202
1203 /*
1204 * fnic_fcpio_cmpl_handler
1205 * Routine to service the cq for wq_copy
1206 */
1207 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1208 unsigned int cq_index,
1209 struct fcpio_fw_req *desc)
1210 {
1211 struct fnic *fnic = vnic_dev_priv(vdev);
1212
1213 switch (desc->hdr.type) {
1214 case FCPIO_ICMND_CMPL: /* fw completed a command */
1215 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1216 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1217 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1218 case FCPIO_RESET_CMPL: /* fw completed reset */
1219 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1220 break;
1221 default:
1222 break;
1223 }
1224
1225 switch (desc->hdr.type) {
1226 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1227 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1228 break;
1229
1230 case FCPIO_ICMND_CMPL: /* fw completed a command */
1231 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1232 break;
1233
1234 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1235 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1236 break;
1237
1238 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1239 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1240 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1241 break;
1242
1243 case FCPIO_RESET_CMPL: /* fw completed reset */
1244 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1245 break;
1246
1247 default:
1248 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1249 "firmware completion type %d\n",
1250 desc->hdr.type);
1251 break;
1252 }
1253
1254 return 0;
1255 }
1256
1257 /*
1258 * fnic_wq_copy_cmpl_handler
1259 * Routine to process wq copy
1260 */
1261 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1262 {
1263 unsigned int wq_work_done = 0;
1264 unsigned int i, cq_index;
1265 unsigned int cur_work_done;
1266
1267 for (i = 0; i < fnic->wq_copy_count; i++) {
1268 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1269 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1270 fnic_fcpio_cmpl_handler,
1271 copy_work_to_do);
1272 wq_work_done += cur_work_done;
1273 }
1274 return wq_work_done;
1275 }
1276
1277 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1278 {
1279 int i;
1280 struct fnic_io_req *io_req;
1281 unsigned long flags = 0;
1282 struct scsi_cmnd *sc;
1283 spinlock_t *io_lock;
1284 unsigned long start_time = 0;
1285 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1286
1287 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1288 if (i == exclude_id)
1289 continue;
1290
1291 io_lock = fnic_io_lock_tag(fnic, i);
1292 spin_lock_irqsave(io_lock, flags);
1293 sc = scsi_host_find_tag(fnic->lport->host, i);
1294 if (!sc) {
1295 spin_unlock_irqrestore(io_lock, flags);
1296 continue;
1297 }
1298
1299 io_req = (struct fnic_io_req *)CMD_SP(sc);
1300 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1301 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1302 /*
1303 * We will be here only when FW completes reset
1304 * without sending completions for outstanding ios.
1305 */
1306 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1307 if (io_req && io_req->dr_done)
1308 complete(io_req->dr_done);
1309 else if (io_req && io_req->abts_done)
1310 complete(io_req->abts_done);
1311 spin_unlock_irqrestore(io_lock, flags);
1312 continue;
1313 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1314 spin_unlock_irqrestore(io_lock, flags);
1315 continue;
1316 }
1317 if (!io_req) {
1318 spin_unlock_irqrestore(io_lock, flags);
1319 goto cleanup_scsi_cmd;
1320 }
1321
1322 CMD_SP(sc) = NULL;
1323
1324 spin_unlock_irqrestore(io_lock, flags);
1325
1326 /*
1327 * If there is a scsi_cmnd associated with this io_req, then
1328 * free the corresponding state
1329 */
1330 start_time = io_req->start_time;
1331 fnic_release_ioreq_buf(fnic, io_req, sc);
1332 mempool_free(io_req, fnic->io_req_pool);
1333
1334 cleanup_scsi_cmd:
1335 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1336 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1337 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n",
1338 __func__, (jiffies - start_time));
1339
1340 if (atomic64_read(&fnic->io_cmpl_skip))
1341 atomic64_dec(&fnic->io_cmpl_skip);
1342 else
1343 atomic64_inc(&fnic_stats->io_stats.io_completions);
1344
1345 /* Complete the command to SCSI */
1346 if (sc->scsi_done) {
1347 FNIC_TRACE(fnic_cleanup_io,
1348 sc->device->host->host_no, i, sc,
1349 jiffies_to_msecs(jiffies - start_time),
1350 0, ((u64)sc->cmnd[0] << 32 |
1351 (u64)sc->cmnd[2] << 24 |
1352 (u64)sc->cmnd[3] << 16 |
1353 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1354 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1355
1356 sc->scsi_done(sc);
1357 }
1358 }
1359 }
1360
1361 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1362 struct fcpio_host_req *desc)
1363 {
1364 u32 id;
1365 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1366 struct fnic_io_req *io_req;
1367 struct scsi_cmnd *sc;
1368 unsigned long flags;
1369 spinlock_t *io_lock;
1370 unsigned long start_time = 0;
1371
1372 /* get the tag reference */
1373 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1374 id &= FNIC_TAG_MASK;
1375
1376 if (id >= fnic->fnic_max_tag_id)
1377 return;
1378
1379 sc = scsi_host_find_tag(fnic->lport->host, id);
1380 if (!sc)
1381 return;
1382
1383 io_lock = fnic_io_lock_hash(fnic, sc);
1384 spin_lock_irqsave(io_lock, flags);
1385
1386 /* Get the IO context which this desc refers to */
1387 io_req = (struct fnic_io_req *)CMD_SP(sc);
1388
1389 /* fnic interrupts are turned off by now */
1390
1391 if (!io_req) {
1392 spin_unlock_irqrestore(io_lock, flags);
1393 goto wq_copy_cleanup_scsi_cmd;
1394 }
1395
1396 CMD_SP(sc) = NULL;
1397
1398 spin_unlock_irqrestore(io_lock, flags);
1399
1400 start_time = io_req->start_time;
1401 fnic_release_ioreq_buf(fnic, io_req, sc);
1402 mempool_free(io_req, fnic->io_req_pool);
1403
1404 wq_copy_cleanup_scsi_cmd:
1405 sc->result = DID_NO_CONNECT << 16;
1406 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1407 " DID_NO_CONNECT\n");
1408
1409 if (sc->scsi_done) {
1410 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1411 sc->device->host->host_no, id, sc,
1412 jiffies_to_msecs(jiffies - start_time),
1413 0, ((u64)sc->cmnd[0] << 32 |
1414 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1415 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1416 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1417
1418 sc->scsi_done(sc);
1419 }
1420 }
1421
1422 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1423 u32 task_req, u8 *fc_lun,
1424 struct fnic_io_req *io_req)
1425 {
1426 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1427 struct Scsi_Host *host = fnic->lport->host;
1428 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1429 unsigned long flags;
1430
1431 spin_lock_irqsave(host->host_lock, flags);
1432 if (unlikely(fnic_chk_state_flags_locked(fnic,
1433 FNIC_FLAGS_IO_BLOCKED))) {
1434 spin_unlock_irqrestore(host->host_lock, flags);
1435 return 1;
1436 } else
1437 atomic_inc(&fnic->in_flight);
1438 spin_unlock_irqrestore(host->host_lock, flags);
1439
1440 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1441
1442 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1443 free_wq_copy_descs(fnic, wq);
1444
1445 if (!vnic_wq_copy_desc_avail(wq)) {
1446 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1447 atomic_dec(&fnic->in_flight);
1448 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1449 "fnic_queue_abort_io_req: failure: no descriptors\n");
1450 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1451 return 1;
1452 }
1453 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1454 0, task_req, tag, fc_lun, io_req->port_id,
1455 fnic->config.ra_tov, fnic->config.ed_tov);
1456
1457 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1458 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1459 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1460 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1461 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1462
1463 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1464 atomic_dec(&fnic->in_flight);
1465
1466 return 0;
1467 }
1468
1469 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1470 {
1471 int tag;
1472 int abt_tag;
1473 int term_cnt = 0;
1474 struct fnic_io_req *io_req;
1475 spinlock_t *io_lock;
1476 unsigned long flags;
1477 struct scsi_cmnd *sc;
1478 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1479 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1480 struct scsi_lun fc_lun;
1481 enum fnic_ioreq_state old_ioreq_state;
1482
1483 FNIC_SCSI_DBG(KERN_DEBUG,
1484 fnic->lport->host,
1485 "fnic_rport_exch_reset called portid 0x%06x\n",
1486 port_id);
1487
1488 if (fnic->in_remove)
1489 return;
1490
1491 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1492 abt_tag = tag;
1493 io_lock = fnic_io_lock_tag(fnic, tag);
1494 spin_lock_irqsave(io_lock, flags);
1495 sc = scsi_host_find_tag(fnic->lport->host, tag);
1496 if (!sc) {
1497 spin_unlock_irqrestore(io_lock, flags);
1498 continue;
1499 }
1500
1501 io_req = (struct fnic_io_req *)CMD_SP(sc);
1502
1503 if (!io_req || io_req->port_id != port_id) {
1504 spin_unlock_irqrestore(io_lock, flags);
1505 continue;
1506 }
1507
1508 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1509 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1510 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1511 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1512 sc);
1513 spin_unlock_irqrestore(io_lock, flags);
1514 continue;
1515 }
1516
1517 /*
1518 * Found IO that is still pending with firmware and
1519 * belongs to rport that went away
1520 */
1521 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1522 spin_unlock_irqrestore(io_lock, flags);
1523 continue;
1524 }
1525 if (io_req->abts_done) {
1526 shost_printk(KERN_ERR, fnic->lport->host,
1527 "fnic_rport_exch_reset: io_req->abts_done is set "
1528 "state is %s\n",
1529 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1530 }
1531
1532 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1533 shost_printk(KERN_ERR, fnic->lport->host,
1534 "rport_exch_reset "
1535 "IO not yet issued %p tag 0x%x flags "
1536 "%x state %d\n",
1537 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1538 }
1539 old_ioreq_state = CMD_STATE(sc);
1540 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1541 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1542 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1543 atomic64_inc(&reset_stats->device_reset_terminates);
1544 abt_tag = (tag | FNIC_TAG_DEV_RST);
1545 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1546 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1547 sc);
1548 }
1549
1550 BUG_ON(io_req->abts_done);
1551
1552 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1553 "fnic_rport_reset_exch: Issuing abts\n");
1554
1555 spin_unlock_irqrestore(io_lock, flags);
1556
1557 /* Now queue the abort command to firmware */
1558 int_to_scsilun(sc->device->lun, &fc_lun);
1559
1560 if (fnic_queue_abort_io_req(fnic, abt_tag,
1561 FCPIO_ITMF_ABT_TASK_TERM,
1562 fc_lun.scsi_lun, io_req)) {
1563 /*
1564 * Revert the cmd state back to old state, if
1565 * it hasn't changed in between. This cmd will get
1566 * aborted later by scsi_eh, or cleaned up during
1567 * lun reset
1568 */
1569 spin_lock_irqsave(io_lock, flags);
1570 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1571 CMD_STATE(sc) = old_ioreq_state;
1572 spin_unlock_irqrestore(io_lock, flags);
1573 } else {
1574 spin_lock_irqsave(io_lock, flags);
1575 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1576 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1577 else
1578 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1579 spin_unlock_irqrestore(io_lock, flags);
1580 atomic64_inc(&term_stats->terminates);
1581 term_cnt++;
1582 }
1583 }
1584 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1585 atomic64_set(&term_stats->max_terminates, term_cnt);
1586
1587 }
1588
1589 void fnic_terminate_rport_io(struct fc_rport *rport)
1590 {
1591 int tag;
1592 int abt_tag;
1593 int term_cnt = 0;
1594 struct fnic_io_req *io_req;
1595 spinlock_t *io_lock;
1596 unsigned long flags;
1597 struct scsi_cmnd *sc;
1598 struct scsi_lun fc_lun;
1599 struct fc_rport_libfc_priv *rdata;
1600 struct fc_lport *lport;
1601 struct fnic *fnic;
1602 struct fc_rport *cmd_rport;
1603 struct reset_stats *reset_stats;
1604 struct terminate_stats *term_stats;
1605 enum fnic_ioreq_state old_ioreq_state;
1606
1607 if (!rport) {
1608 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1609 return;
1610 }
1611 rdata = rport->dd_data;
1612
1613 if (!rdata) {
1614 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1615 return;
1616 }
1617 lport = rdata->local_port;
1618
1619 if (!lport) {
1620 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1621 return;
1622 }
1623 fnic = lport_priv(lport);
1624 FNIC_SCSI_DBG(KERN_DEBUG,
1625 fnic->lport->host, "fnic_terminate_rport_io called"
1626 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1627 rport->port_name, rport->node_name, rport,
1628 rport->port_id);
1629
1630 if (fnic->in_remove)
1631 return;
1632
1633 reset_stats = &fnic->fnic_stats.reset_stats;
1634 term_stats = &fnic->fnic_stats.term_stats;
1635
1636 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1637 abt_tag = tag;
1638 io_lock = fnic_io_lock_tag(fnic, tag);
1639 spin_lock_irqsave(io_lock, flags);
1640 sc = scsi_host_find_tag(fnic->lport->host, tag);
1641 if (!sc) {
1642 spin_unlock_irqrestore(io_lock, flags);
1643 continue;
1644 }
1645
1646 cmd_rport = starget_to_rport(scsi_target(sc->device));
1647 if (rport != cmd_rport) {
1648 spin_unlock_irqrestore(io_lock, flags);
1649 continue;
1650 }
1651
1652 io_req = (struct fnic_io_req *)CMD_SP(sc);
1653
1654 if (!io_req || rport != cmd_rport) {
1655 spin_unlock_irqrestore(io_lock, flags);
1656 continue;
1657 }
1658
1659 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1660 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1661 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1662 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1663 sc);
1664 spin_unlock_irqrestore(io_lock, flags);
1665 continue;
1666 }
1667 /*
1668 * Found IO that is still pending with firmware and
1669 * belongs to rport that went away
1670 */
1671 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1672 spin_unlock_irqrestore(io_lock, flags);
1673 continue;
1674 }
1675 if (io_req->abts_done) {
1676 shost_printk(KERN_ERR, fnic->lport->host,
1677 "fnic_terminate_rport_io: io_req->abts_done is set "
1678 "state is %s\n",
1679 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1680 }
1681 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1682 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1683 "fnic_terminate_rport_io "
1684 "IO not yet issued %p tag 0x%x flags "
1685 "%x state %d\n",
1686 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1687 }
1688 old_ioreq_state = CMD_STATE(sc);
1689 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1690 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1691 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1692 atomic64_inc(&reset_stats->device_reset_terminates);
1693 abt_tag = (tag | FNIC_TAG_DEV_RST);
1694 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1695 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1696 }
1697
1698 BUG_ON(io_req->abts_done);
1699
1700 FNIC_SCSI_DBG(KERN_DEBUG,
1701 fnic->lport->host,
1702 "fnic_terminate_rport_io: Issuing abts\n");
1703
1704 spin_unlock_irqrestore(io_lock, flags);
1705
1706 /* Now queue the abort command to firmware */
1707 int_to_scsilun(sc->device->lun, &fc_lun);
1708
1709 if (fnic_queue_abort_io_req(fnic, abt_tag,
1710 FCPIO_ITMF_ABT_TASK_TERM,
1711 fc_lun.scsi_lun, io_req)) {
1712 /*
1713 * Revert the cmd state back to old state, if
1714 * it hasn't changed in between. This cmd will get
1715 * aborted later by scsi_eh, or cleaned up during
1716 * lun reset
1717 */
1718 spin_lock_irqsave(io_lock, flags);
1719 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1720 CMD_STATE(sc) = old_ioreq_state;
1721 spin_unlock_irqrestore(io_lock, flags);
1722 } else {
1723 spin_lock_irqsave(io_lock, flags);
1724 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1725 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1726 else
1727 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1728 spin_unlock_irqrestore(io_lock, flags);
1729 atomic64_inc(&term_stats->terminates);
1730 term_cnt++;
1731 }
1732 }
1733 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1734 atomic64_set(&term_stats->max_terminates, term_cnt);
1735
1736 }
1737
1738 /*
1739 * This function is exported to SCSI for sending abort cmnds.
1740 * A SCSI IO is represented by a io_req in the driver.
1741 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1742 */
1743 int fnic_abort_cmd(struct scsi_cmnd *sc)
1744 {
1745 struct fc_lport *lp;
1746 struct fnic *fnic;
1747 struct fnic_io_req *io_req = NULL;
1748 struct fc_rport *rport;
1749 spinlock_t *io_lock;
1750 unsigned long flags;
1751 unsigned long start_time = 0;
1752 int ret = SUCCESS;
1753 u32 task_req = 0;
1754 struct scsi_lun fc_lun;
1755 struct fnic_stats *fnic_stats;
1756 struct abort_stats *abts_stats;
1757 struct terminate_stats *term_stats;
1758 enum fnic_ioreq_state old_ioreq_state;
1759 int tag;
1760 DECLARE_COMPLETION_ONSTACK(tm_done);
1761
1762 /* Wait for rport to unblock */
1763 fc_block_scsi_eh(sc);
1764
1765 /* Get local-port, check ready and link up */
1766 lp = shost_priv(sc->device->host);
1767
1768 fnic = lport_priv(lp);
1769 fnic_stats = &fnic->fnic_stats;
1770 abts_stats = &fnic->fnic_stats.abts_stats;
1771 term_stats = &fnic->fnic_stats.term_stats;
1772
1773 rport = starget_to_rport(scsi_target(sc->device));
1774 tag = sc->request->tag;
1775 FNIC_SCSI_DBG(KERN_DEBUG,
1776 fnic->lport->host,
1777 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1778 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1779
1780 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1781
1782 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1783 ret = FAILED;
1784 goto fnic_abort_cmd_end;
1785 }
1786
1787 /*
1788 * Avoid a race between SCSI issuing the abort and the device
1789 * completing the command.
1790 *
1791 * If the command is already completed by the fw cmpl code,
1792 * we just return SUCCESS from here. This means that the abort
1793 * succeeded. In the SCSI ML, since the timeout for command has
1794 * happened, the completion wont actually complete the command
1795 * and it will be considered as an aborted command
1796 *
1797 * The CMD_SP will not be cleared except while holding io_req_lock.
1798 */
1799 io_lock = fnic_io_lock_hash(fnic, sc);
1800 spin_lock_irqsave(io_lock, flags);
1801 io_req = (struct fnic_io_req *)CMD_SP(sc);
1802 if (!io_req) {
1803 spin_unlock_irqrestore(io_lock, flags);
1804 goto fnic_abort_cmd_end;
1805 }
1806
1807 io_req->abts_done = &tm_done;
1808
1809 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1810 spin_unlock_irqrestore(io_lock, flags);
1811 goto wait_pending;
1812 }
1813 /*
1814 * Command is still pending, need to abort it
1815 * If the firmware completes the command after this point,
1816 * the completion wont be done till mid-layer, since abort
1817 * has already started.
1818 */
1819 old_ioreq_state = CMD_STATE(sc);
1820 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1821 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1822
1823 spin_unlock_irqrestore(io_lock, flags);
1824
1825 /*
1826 * Check readiness of the remote port. If the path to remote
1827 * port is up, then send abts to the remote port to terminate
1828 * the IO. Else, just locally terminate the IO in the firmware
1829 */
1830 if (fc_remote_port_chkready(rport) == 0)
1831 task_req = FCPIO_ITMF_ABT_TASK;
1832 else {
1833 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1834 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1835 }
1836
1837 /* Now queue the abort command to firmware */
1838 int_to_scsilun(sc->device->lun, &fc_lun);
1839
1840 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1841 fc_lun.scsi_lun, io_req)) {
1842 spin_lock_irqsave(io_lock, flags);
1843 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1844 CMD_STATE(sc) = old_ioreq_state;
1845 io_req = (struct fnic_io_req *)CMD_SP(sc);
1846 if (io_req)
1847 io_req->abts_done = NULL;
1848 spin_unlock_irqrestore(io_lock, flags);
1849 ret = FAILED;
1850 goto fnic_abort_cmd_end;
1851 }
1852 if (task_req == FCPIO_ITMF_ABT_TASK) {
1853 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1854 atomic64_inc(&fnic_stats->abts_stats.aborts);
1855 } else {
1856 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1857 atomic64_inc(&fnic_stats->term_stats.terminates);
1858 }
1859
1860 /*
1861 * We queued an abort IO, wait for its completion.
1862 * Once the firmware completes the abort command, it will
1863 * wake up this thread.
1864 */
1865 wait_pending:
1866 wait_for_completion_timeout(&tm_done,
1867 msecs_to_jiffies
1868 (2 * fnic->config.ra_tov +
1869 fnic->config.ed_tov));
1870
1871 /* Check the abort status */
1872 spin_lock_irqsave(io_lock, flags);
1873
1874 io_req = (struct fnic_io_req *)CMD_SP(sc);
1875 if (!io_req) {
1876 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1877 spin_unlock_irqrestore(io_lock, flags);
1878 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1879 ret = FAILED;
1880 goto fnic_abort_cmd_end;
1881 }
1882 io_req->abts_done = NULL;
1883
1884 /* fw did not complete abort, timed out */
1885 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1886 spin_unlock_irqrestore(io_lock, flags);
1887 if (task_req == FCPIO_ITMF_ABT_TASK) {
1888 atomic64_inc(&abts_stats->abort_drv_timeouts);
1889 } else {
1890 atomic64_inc(&term_stats->terminate_drv_timeouts);
1891 }
1892 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1893 ret = FAILED;
1894 goto fnic_abort_cmd_end;
1895 }
1896
1897 /* IO out of order */
1898
1899 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1900 spin_unlock_irqrestore(io_lock, flags);
1901 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1902 "Issuing Host reset due to out of order IO\n");
1903
1904 if (fnic_host_reset(sc) == FAILED) {
1905 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1906 "fnic_host_reset failed.\n");
1907 }
1908 ret = FAILED;
1909 goto fnic_abort_cmd_end;
1910 }
1911
1912 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1913
1914 /*
1915 * firmware completed the abort, check the status,
1916 * free the io_req irrespective of failure or success
1917 */
1918 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1919 ret = FAILED;
1920
1921 CMD_SP(sc) = NULL;
1922
1923 spin_unlock_irqrestore(io_lock, flags);
1924
1925 start_time = io_req->start_time;
1926 fnic_release_ioreq_buf(fnic, io_req, sc);
1927 mempool_free(io_req, fnic->io_req_pool);
1928
1929 fnic_abort_cmd_end:
1930 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1931 sc->request->tag, sc,
1932 jiffies_to_msecs(jiffies - start_time),
1933 0, ((u64)sc->cmnd[0] << 32 |
1934 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1935 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1936 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1937
1938 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1939 "Returning from abort cmd type %x %s\n", task_req,
1940 (ret == SUCCESS) ?
1941 "SUCCESS" : "FAILED");
1942 return ret;
1943 }
1944
1945 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1946 struct scsi_cmnd *sc,
1947 struct fnic_io_req *io_req)
1948 {
1949 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1950 struct Scsi_Host *host = fnic->lport->host;
1951 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1952 struct scsi_lun fc_lun;
1953 int ret = 0;
1954 unsigned long intr_flags;
1955
1956 spin_lock_irqsave(host->host_lock, intr_flags);
1957 if (unlikely(fnic_chk_state_flags_locked(fnic,
1958 FNIC_FLAGS_IO_BLOCKED))) {
1959 spin_unlock_irqrestore(host->host_lock, intr_flags);
1960 return FAILED;
1961 } else
1962 atomic_inc(&fnic->in_flight);
1963 spin_unlock_irqrestore(host->host_lock, intr_flags);
1964
1965 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1966
1967 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1968 free_wq_copy_descs(fnic, wq);
1969
1970 if (!vnic_wq_copy_desc_avail(wq)) {
1971 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1972 "queue_dr_io_req failure - no descriptors\n");
1973 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
1974 ret = -EAGAIN;
1975 goto lr_io_req_end;
1976 }
1977
1978 /* fill in the lun info */
1979 int_to_scsilun(sc->device->lun, &fc_lun);
1980
1981 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1982 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1983 fc_lun.scsi_lun, io_req->port_id,
1984 fnic->config.ra_tov, fnic->config.ed_tov);
1985
1986 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1987 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1988 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1989 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1990 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1991
1992 lr_io_req_end:
1993 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1994 atomic_dec(&fnic->in_flight);
1995
1996 return ret;
1997 }
1998
1999 /*
2000 * Clean up any pending aborts on the lun
2001 * For each outstanding IO on this lun, whose abort is not completed by fw,
2002 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2003 * successfully aborted, 1 otherwise
2004 */
2005 static int fnic_clean_pending_aborts(struct fnic *fnic,
2006 struct scsi_cmnd *lr_sc)
2007 {
2008 int tag, abt_tag;
2009 struct fnic_io_req *io_req;
2010 spinlock_t *io_lock;
2011 unsigned long flags;
2012 int ret = 0;
2013 struct scsi_cmnd *sc;
2014 struct scsi_lun fc_lun;
2015 struct scsi_device *lun_dev = lr_sc->device;
2016 DECLARE_COMPLETION_ONSTACK(tm_done);
2017 enum fnic_ioreq_state old_ioreq_state;
2018
2019 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2020 io_lock = fnic_io_lock_tag(fnic, tag);
2021 spin_lock_irqsave(io_lock, flags);
2022 sc = scsi_host_find_tag(fnic->lport->host, tag);
2023 /*
2024 * ignore this lun reset cmd or cmds that do not belong to
2025 * this lun
2026 */
2027 if (!sc || sc == lr_sc || sc->device != lun_dev) {
2028 spin_unlock_irqrestore(io_lock, flags);
2029 continue;
2030 }
2031
2032 io_req = (struct fnic_io_req *)CMD_SP(sc);
2033
2034 if (!io_req || sc->device != lun_dev) {
2035 spin_unlock_irqrestore(io_lock, flags);
2036 continue;
2037 }
2038
2039 /*
2040 * Found IO that is still pending with firmware and
2041 * belongs to the LUN that we are resetting
2042 */
2043 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2044 "Found IO in %s on lun\n",
2045 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2046
2047 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2048 spin_unlock_irqrestore(io_lock, flags);
2049 continue;
2050 }
2051 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2052 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2053 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2054 "%s dev rst not pending sc 0x%p\n", __func__,
2055 sc);
2056 spin_unlock_irqrestore(io_lock, flags);
2057 continue;
2058 }
2059
2060 if (io_req->abts_done)
2061 shost_printk(KERN_ERR, fnic->lport->host,
2062 "%s: io_req->abts_done is set state is %s\n",
2063 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2064 old_ioreq_state = CMD_STATE(sc);
2065 /*
2066 * Any pending IO issued prior to reset is expected to be
2067 * in abts pending state, if not we need to set
2068 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2069 * When IO is completed, the IO will be handed over and
2070 * handled in this function.
2071 */
2072 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2073
2074 BUG_ON(io_req->abts_done);
2075
2076 abt_tag = tag;
2077 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2078 abt_tag |= FNIC_TAG_DEV_RST;
2079 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2080 "%s: dev rst sc 0x%p\n", __func__, sc);
2081 }
2082
2083 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2084 io_req->abts_done = &tm_done;
2085 spin_unlock_irqrestore(io_lock, flags);
2086
2087 /* Now queue the abort command to firmware */
2088 int_to_scsilun(sc->device->lun, &fc_lun);
2089
2090 if (fnic_queue_abort_io_req(fnic, abt_tag,
2091 FCPIO_ITMF_ABT_TASK_TERM,
2092 fc_lun.scsi_lun, io_req)) {
2093 spin_lock_irqsave(io_lock, flags);
2094 io_req = (struct fnic_io_req *)CMD_SP(sc);
2095 if (io_req)
2096 io_req->abts_done = NULL;
2097 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2098 CMD_STATE(sc) = old_ioreq_state;
2099 spin_unlock_irqrestore(io_lock, flags);
2100 ret = 1;
2101 goto clean_pending_aborts_end;
2102 } else {
2103 spin_lock_irqsave(io_lock, flags);
2104 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2105 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2106 spin_unlock_irqrestore(io_lock, flags);
2107 }
2108 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2109
2110 wait_for_completion_timeout(&tm_done,
2111 msecs_to_jiffies
2112 (fnic->config.ed_tov));
2113
2114 /* Recheck cmd state to check if it is now aborted */
2115 spin_lock_irqsave(io_lock, flags);
2116 io_req = (struct fnic_io_req *)CMD_SP(sc);
2117 if (!io_req) {
2118 spin_unlock_irqrestore(io_lock, flags);
2119 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2120 continue;
2121 }
2122
2123 io_req->abts_done = NULL;
2124
2125 /* if abort is still pending with fw, fail */
2126 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2127 spin_unlock_irqrestore(io_lock, flags);
2128 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2129 ret = 1;
2130 goto clean_pending_aborts_end;
2131 }
2132 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2133 CMD_SP(sc) = NULL;
2134 spin_unlock_irqrestore(io_lock, flags);
2135
2136 fnic_release_ioreq_buf(fnic, io_req, sc);
2137 mempool_free(io_req, fnic->io_req_pool);
2138 }
2139
2140 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2141
2142 /* walk again to check, if IOs are still pending in fw */
2143 if (fnic_is_abts_pending(fnic, lr_sc))
2144 ret = FAILED;
2145
2146 clean_pending_aborts_end:
2147 return ret;
2148 }
2149
2150 /**
2151 * fnic_scsi_host_start_tag
2152 * Allocates tagid from host's tag list
2153 **/
2154 static inline int
2155 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2156 {
2157 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2158 int tag, ret = SCSI_NO_TAG;
2159
2160 BUG_ON(!bqt);
2161 if (!bqt) {
2162 pr_err("Tags are not supported\n");
2163 goto end;
2164 }
2165
2166 do {
2167 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
2168 if (tag >= bqt->max_depth) {
2169 pr_err("Tag allocation failure\n");
2170 goto end;
2171 }
2172 } while (test_and_set_bit(tag, bqt->tag_map));
2173
2174 bqt->tag_index[tag] = sc->request;
2175 sc->request->tag = tag;
2176 sc->tag = tag;
2177 if (!sc->request->special)
2178 sc->request->special = sc;
2179
2180 ret = tag;
2181
2182 end:
2183 return ret;
2184 }
2185
2186 /**
2187 * fnic_scsi_host_end_tag
2188 * frees tag allocated by fnic_scsi_host_start_tag.
2189 **/
2190 static inline void
2191 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2192 {
2193 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2194 int tag = sc->request->tag;
2195
2196 if (tag == SCSI_NO_TAG)
2197 return;
2198
2199 BUG_ON(!bqt || !bqt->tag_index[tag]);
2200 if (!bqt)
2201 return;
2202
2203 bqt->tag_index[tag] = NULL;
2204 clear_bit(tag, bqt->tag_map);
2205
2206 return;
2207 }
2208
2209 /*
2210 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2211 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2212 * on the LUN.
2213 */
2214 int fnic_device_reset(struct scsi_cmnd *sc)
2215 {
2216 struct fc_lport *lp;
2217 struct fnic *fnic;
2218 struct fnic_io_req *io_req = NULL;
2219 struct fc_rport *rport;
2220 int status;
2221 int ret = FAILED;
2222 spinlock_t *io_lock;
2223 unsigned long flags;
2224 unsigned long start_time = 0;
2225 struct scsi_lun fc_lun;
2226 struct fnic_stats *fnic_stats;
2227 struct reset_stats *reset_stats;
2228 int tag = 0;
2229 DECLARE_COMPLETION_ONSTACK(tm_done);
2230 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2231
2232 /* Wait for rport to unblock */
2233 fc_block_scsi_eh(sc);
2234
2235 /* Get local-port, check ready and link up */
2236 lp = shost_priv(sc->device->host);
2237
2238 fnic = lport_priv(lp);
2239 fnic_stats = &fnic->fnic_stats;
2240 reset_stats = &fnic->fnic_stats.reset_stats;
2241
2242 atomic64_inc(&reset_stats->device_resets);
2243
2244 rport = starget_to_rport(scsi_target(sc->device));
2245 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2246 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2247 rport->port_id, sc->device->lun, sc);
2248
2249 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2250 goto fnic_device_reset_end;
2251
2252 /* Check if remote port up */
2253 if (fc_remote_port_chkready(rport)) {
2254 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2255 goto fnic_device_reset_end;
2256 }
2257
2258 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2259 /* Allocate tag if not present */
2260
2261 tag = sc->request->tag;
2262 if (unlikely(tag < 0)) {
2263 /*
2264 * XXX(hch): current the midlayer fakes up a struct
2265 * request for the explicit reset ioctls, and those
2266 * don't have a tag allocated to them. The below
2267 * code pokes into midlayer structures to paper over
2268 * this design issue, but that won't work for blk-mq.
2269 *
2270 * Either someone who can actually test the hardware
2271 * will have to come up with a similar hack for the
2272 * blk-mq case, or we'll have to bite the bullet and
2273 * fix the way the EH ioctls work for real, but until
2274 * that happens we fail these explicit requests here.
2275 */
2276 if (shost_use_blk_mq(sc->device->host))
2277 goto fnic_device_reset_end;
2278
2279 tag = fnic_scsi_host_start_tag(fnic, sc);
2280 if (unlikely(tag == SCSI_NO_TAG))
2281 goto fnic_device_reset_end;
2282 tag_gen_flag = 1;
2283 }
2284 io_lock = fnic_io_lock_hash(fnic, sc);
2285 spin_lock_irqsave(io_lock, flags);
2286 io_req = (struct fnic_io_req *)CMD_SP(sc);
2287
2288 /*
2289 * If there is a io_req attached to this command, then use it,
2290 * else allocate a new one.
2291 */
2292 if (!io_req) {
2293 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2294 if (!io_req) {
2295 spin_unlock_irqrestore(io_lock, flags);
2296 goto fnic_device_reset_end;
2297 }
2298 memset(io_req, 0, sizeof(*io_req));
2299 io_req->port_id = rport->port_id;
2300 CMD_SP(sc) = (char *)io_req;
2301 }
2302 io_req->dr_done = &tm_done;
2303 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2304 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2305 spin_unlock_irqrestore(io_lock, flags);
2306
2307 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2308
2309 /*
2310 * issue the device reset, if enqueue failed, clean up the ioreq
2311 * and break assoc with scsi cmd
2312 */
2313 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2314 spin_lock_irqsave(io_lock, flags);
2315 io_req = (struct fnic_io_req *)CMD_SP(sc);
2316 if (io_req)
2317 io_req->dr_done = NULL;
2318 goto fnic_device_reset_clean;
2319 }
2320 spin_lock_irqsave(io_lock, flags);
2321 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2322 spin_unlock_irqrestore(io_lock, flags);
2323
2324 /*
2325 * Wait on the local completion for LUN reset. The io_req may be
2326 * freed while we wait since we hold no lock.
2327 */
2328 wait_for_completion_timeout(&tm_done,
2329 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2330
2331 spin_lock_irqsave(io_lock, flags);
2332 io_req = (struct fnic_io_req *)CMD_SP(sc);
2333 if (!io_req) {
2334 spin_unlock_irqrestore(io_lock, flags);
2335 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2336 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2337 goto fnic_device_reset_end;
2338 }
2339 io_req->dr_done = NULL;
2340
2341 status = CMD_LR_STATUS(sc);
2342
2343 /*
2344 * If lun reset not completed, bail out with failed. io_req
2345 * gets cleaned up during higher levels of EH
2346 */
2347 if (status == FCPIO_INVALID_CODE) {
2348 atomic64_inc(&reset_stats->device_reset_timeouts);
2349 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2350 "Device reset timed out\n");
2351 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2352 spin_unlock_irqrestore(io_lock, flags);
2353 int_to_scsilun(sc->device->lun, &fc_lun);
2354 /*
2355 * Issue abort and terminate on device reset request.
2356 * If q'ing of terminate fails, retry it after a delay.
2357 */
2358 while (1) {
2359 spin_lock_irqsave(io_lock, flags);
2360 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2361 spin_unlock_irqrestore(io_lock, flags);
2362 break;
2363 }
2364 spin_unlock_irqrestore(io_lock, flags);
2365 if (fnic_queue_abort_io_req(fnic,
2366 tag | FNIC_TAG_DEV_RST,
2367 FCPIO_ITMF_ABT_TASK_TERM,
2368 fc_lun.scsi_lun, io_req)) {
2369 wait_for_completion_timeout(&tm_done,
2370 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2371 } else {
2372 spin_lock_irqsave(io_lock, flags);
2373 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2374 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2375 io_req->abts_done = &tm_done;
2376 spin_unlock_irqrestore(io_lock, flags);
2377 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2378 "Abort and terminate issued on Device reset "
2379 "tag 0x%x sc 0x%p\n", tag, sc);
2380 break;
2381 }
2382 }
2383 while (1) {
2384 spin_lock_irqsave(io_lock, flags);
2385 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2386 spin_unlock_irqrestore(io_lock, flags);
2387 wait_for_completion_timeout(&tm_done,
2388 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2389 break;
2390 } else {
2391 io_req = (struct fnic_io_req *)CMD_SP(sc);
2392 io_req->abts_done = NULL;
2393 goto fnic_device_reset_clean;
2394 }
2395 }
2396 } else {
2397 spin_unlock_irqrestore(io_lock, flags);
2398 }
2399
2400 /* Completed, but not successful, clean up the io_req, return fail */
2401 if (status != FCPIO_SUCCESS) {
2402 spin_lock_irqsave(io_lock, flags);
2403 FNIC_SCSI_DBG(KERN_DEBUG,
2404 fnic->lport->host,
2405 "Device reset completed - failed\n");
2406 io_req = (struct fnic_io_req *)CMD_SP(sc);
2407 goto fnic_device_reset_clean;
2408 }
2409
2410 /*
2411 * Clean up any aborts on this lun that have still not
2412 * completed. If any of these fail, then LUN reset fails.
2413 * clean_pending_aborts cleans all cmds on this lun except
2414 * the lun reset cmd. If all cmds get cleaned, the lun reset
2415 * succeeds
2416 */
2417 if (fnic_clean_pending_aborts(fnic, sc)) {
2418 spin_lock_irqsave(io_lock, flags);
2419 io_req = (struct fnic_io_req *)CMD_SP(sc);
2420 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2421 "Device reset failed"
2422 " since could not abort all IOs\n");
2423 goto fnic_device_reset_clean;
2424 }
2425
2426 /* Clean lun reset command */
2427 spin_lock_irqsave(io_lock, flags);
2428 io_req = (struct fnic_io_req *)CMD_SP(sc);
2429 if (io_req)
2430 /* Completed, and successful */
2431 ret = SUCCESS;
2432
2433 fnic_device_reset_clean:
2434 if (io_req)
2435 CMD_SP(sc) = NULL;
2436
2437 spin_unlock_irqrestore(io_lock, flags);
2438
2439 if (io_req) {
2440 start_time = io_req->start_time;
2441 fnic_release_ioreq_buf(fnic, io_req, sc);
2442 mempool_free(io_req, fnic->io_req_pool);
2443 }
2444
2445 fnic_device_reset_end:
2446 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2447 sc->request->tag, sc,
2448 jiffies_to_msecs(jiffies - start_time),
2449 0, ((u64)sc->cmnd[0] << 32 |
2450 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2451 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2452 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2453
2454 /* free tag if it is allocated */
2455 if (unlikely(tag_gen_flag))
2456 fnic_scsi_host_end_tag(fnic, sc);
2457
2458 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2459 "Returning from device reset %s\n",
2460 (ret == SUCCESS) ?
2461 "SUCCESS" : "FAILED");
2462
2463 if (ret == FAILED)
2464 atomic64_inc(&reset_stats->device_reset_failures);
2465
2466 return ret;
2467 }
2468
2469 /* Clean up all IOs, clean up libFC local port */
2470 int fnic_reset(struct Scsi_Host *shost)
2471 {
2472 struct fc_lport *lp;
2473 struct fnic *fnic;
2474 int ret = 0;
2475 struct reset_stats *reset_stats;
2476
2477 lp = shost_priv(shost);
2478 fnic = lport_priv(lp);
2479 reset_stats = &fnic->fnic_stats.reset_stats;
2480
2481 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2482 "fnic_reset called\n");
2483
2484 atomic64_inc(&reset_stats->fnic_resets);
2485
2486 /*
2487 * Reset local port, this will clean up libFC exchanges,
2488 * reset remote port sessions, and if link is up, begin flogi
2489 */
2490 ret = lp->tt.lport_reset(lp);
2491
2492 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2493 "Returning from fnic reset %s\n",
2494 (ret == 0) ?
2495 "SUCCESS" : "FAILED");
2496
2497 if (ret == 0)
2498 atomic64_inc(&reset_stats->fnic_reset_completions);
2499 else
2500 atomic64_inc(&reset_stats->fnic_reset_failures);
2501
2502 return ret;
2503 }
2504
2505 /*
2506 * SCSI Error handling calls driver's eh_host_reset if all prior
2507 * error handling levels return FAILED. If host reset completes
2508 * successfully, and if link is up, then Fabric login begins.
2509 *
2510 * Host Reset is the highest level of error recovery. If this fails, then
2511 * host is offlined by SCSI.
2512 *
2513 */
2514 int fnic_host_reset(struct scsi_cmnd *sc)
2515 {
2516 int ret;
2517 unsigned long wait_host_tmo;
2518 struct Scsi_Host *shost = sc->device->host;
2519 struct fc_lport *lp = shost_priv(shost);
2520
2521 /*
2522 * If fnic_reset is successful, wait for fabric login to complete
2523 * scsi-ml tries to send a TUR to every device if host reset is
2524 * successful, so before returning to scsi, fabric should be up
2525 */
2526 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2527 if (ret == SUCCESS) {
2528 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2529 ret = FAILED;
2530 while (time_before(jiffies, wait_host_tmo)) {
2531 if ((lp->state == LPORT_ST_READY) &&
2532 (lp->link_up)) {
2533 ret = SUCCESS;
2534 break;
2535 }
2536 ssleep(1);
2537 }
2538 }
2539
2540 return ret;
2541 }
2542
2543 /*
2544 * This fxn is called from libFC when host is removed
2545 */
2546 void fnic_scsi_abort_io(struct fc_lport *lp)
2547 {
2548 int err = 0;
2549 unsigned long flags;
2550 enum fnic_state old_state;
2551 struct fnic *fnic = lport_priv(lp);
2552 DECLARE_COMPLETION_ONSTACK(remove_wait);
2553
2554 /* Issue firmware reset for fnic, wait for reset to complete */
2555 retry_fw_reset:
2556 spin_lock_irqsave(&fnic->fnic_lock, flags);
2557 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2558 /* fw reset is in progress, poll for its completion */
2559 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2560 schedule_timeout(msecs_to_jiffies(100));
2561 goto retry_fw_reset;
2562 }
2563
2564 fnic->remove_wait = &remove_wait;
2565 old_state = fnic->state;
2566 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2567 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2568 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2569
2570 err = fnic_fw_reset_handler(fnic);
2571 if (err) {
2572 spin_lock_irqsave(&fnic->fnic_lock, flags);
2573 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2574 fnic->state = old_state;
2575 fnic->remove_wait = NULL;
2576 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2577 return;
2578 }
2579
2580 /* Wait for firmware reset to complete */
2581 wait_for_completion_timeout(&remove_wait,
2582 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2583
2584 spin_lock_irqsave(&fnic->fnic_lock, flags);
2585 fnic->remove_wait = NULL;
2586 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2587 "fnic_scsi_abort_io %s\n",
2588 (fnic->state == FNIC_IN_ETH_MODE) ?
2589 "SUCCESS" : "FAILED");
2590 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2591
2592 }
2593
2594 /*
2595 * This fxn called from libFC to clean up driver IO state on link down
2596 */
2597 void fnic_scsi_cleanup(struct fc_lport *lp)
2598 {
2599 unsigned long flags;
2600 enum fnic_state old_state;
2601 struct fnic *fnic = lport_priv(lp);
2602
2603 /* issue fw reset */
2604 retry_fw_reset:
2605 spin_lock_irqsave(&fnic->fnic_lock, flags);
2606 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2607 /* fw reset is in progress, poll for its completion */
2608 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2609 schedule_timeout(msecs_to_jiffies(100));
2610 goto retry_fw_reset;
2611 }
2612 old_state = fnic->state;
2613 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2614 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2615 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2616
2617 if (fnic_fw_reset_handler(fnic)) {
2618 spin_lock_irqsave(&fnic->fnic_lock, flags);
2619 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2620 fnic->state = old_state;
2621 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2622 }
2623
2624 }
2625
2626 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2627 {
2628 }
2629
2630 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2631 {
2632 struct fnic *fnic = lport_priv(lp);
2633
2634 /* Non-zero sid, nothing to do */
2635 if (sid)
2636 goto call_fc_exch_mgr_reset;
2637
2638 if (did) {
2639 fnic_rport_exch_reset(fnic, did);
2640 goto call_fc_exch_mgr_reset;
2641 }
2642
2643 /*
2644 * sid = 0, did = 0
2645 * link down or device being removed
2646 */
2647 if (!fnic->in_remove)
2648 fnic_scsi_cleanup(lp);
2649 else
2650 fnic_scsi_abort_io(lp);
2651
2652 /* call libFC exch mgr reset to reset its exchanges */
2653 call_fc_exch_mgr_reset:
2654 fc_exch_mgr_reset(lp, sid, did);
2655
2656 }
2657
2658 /*
2659 * fnic_is_abts_pending() is a helper function that
2660 * walks through tag map to check if there is any IOs pending,if there is one,
2661 * then it returns 1 (true), otherwise 0 (false)
2662 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2663 * otherwise, it checks for all IOs.
2664 */
2665 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2666 {
2667 int tag;
2668 struct fnic_io_req *io_req;
2669 spinlock_t *io_lock;
2670 unsigned long flags;
2671 int ret = 0;
2672 struct scsi_cmnd *sc;
2673 struct scsi_device *lun_dev = NULL;
2674
2675 if (lr_sc)
2676 lun_dev = lr_sc->device;
2677
2678 /* walk again to check, if IOs are still pending in fw */
2679 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2680 sc = scsi_host_find_tag(fnic->lport->host, tag);
2681 /*
2682 * ignore this lun reset cmd or cmds that do not belong to
2683 * this lun
2684 */
2685 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2686 continue;
2687
2688 io_lock = fnic_io_lock_hash(fnic, sc);
2689 spin_lock_irqsave(io_lock, flags);
2690
2691 io_req = (struct fnic_io_req *)CMD_SP(sc);
2692
2693 if (!io_req || sc->device != lun_dev) {
2694 spin_unlock_irqrestore(io_lock, flags);
2695 continue;
2696 }
2697
2698 /*
2699 * Found IO that is still pending with firmware and
2700 * belongs to the LUN that we are resetting
2701 */
2702 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2703 "Found IO in %s on lun\n",
2704 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2705
2706 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2707 ret = 1;
2708 spin_unlock_irqrestore(io_lock, flags);
2709 }
2710
2711 return ret;
2712 }
Linux kernel - Deliverables
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