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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_scsi.c
blobf3032ca5051bc0f9ca12c251f0fec490736416a8
1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18 #include <linux/mempool.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/workqueue.h>
22 #include <linux/pci.h>
23 #include <linux/scatterlist.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/delay.h>
29 #include <linux/gfp.h>
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/fc/fc_els.h>
36 #include <scsi/fc/fc_fcoe.h>
37 #include <scsi/libfc.h>
38 #include <scsi/fc_frame.h>
39 #include "fnic_io.h"
40 #include "fnic.h"
41
42 const char *fnic_state_str[] = {
43 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
44 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
45 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
46 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
47 };
48
49 static const char *fnic_ioreq_state_str[] = {
50 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
51 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
52 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
53 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
54 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
55 };
56
57 static const char *fcpio_status_str[] = {
58 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
59 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
60 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
61 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
62 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
63 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
64 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
65 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
66 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
67 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
68 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
69 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
70 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
71 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
72 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
73 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
74 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
75 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
76 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
77 };
78
79 const char *fnic_state_to_str(unsigned int state)
80 {
81 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
82 return "unknown";
83
84 return fnic_state_str[state];
85 }
86
87 static const char *fnic_ioreq_state_to_str(unsigned int state)
88 {
89 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
90 !fnic_ioreq_state_str[state])
91 return "unknown";
92
93 return fnic_ioreq_state_str[state];
94 }
95
96 static const char *fnic_fcpio_status_to_str(unsigned int status)
97 {
98 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
99 return "unknown";
100
101 return fcpio_status_str[status];
102 }
103
104 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
105
106 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
107 struct scsi_cmnd *sc)
108 {
109 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
110
111 return &fnic->io_req_lock[hash];
112 }
113
114 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
115 int tag)
116 {
117 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
118 }
119
120 /*
121 * Unmap the data buffer and sense buffer for an io_req,
122 * also unmap and free the device-private scatter/gather list.
123 */
124 static void fnic_release_ioreq_buf(struct fnic *fnic,
125 struct fnic_io_req *io_req,
126 struct scsi_cmnd *sc)
127 {
128 if (io_req->sgl_list_pa)
129 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
131 PCI_DMA_TODEVICE);
132 scsi_dma_unmap(sc);
133
134 if (io_req->sgl_cnt)
135 mempool_free(io_req->sgl_list_alloc,
136 fnic->io_sgl_pool[io_req->sgl_type]);
137 if (io_req->sense_buf_pa)
138 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
139 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
140 }
141
142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
143 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
144 {
145 /* if no Ack received from firmware, then nothing to clean */
146 if (!fnic->fw_ack_recd[0])
147 return 1;
148
149 /*
150 * Update desc_available count based on number of freed descriptors
151 * Account for wraparound
152 */
153 if (wq->to_clean_index <= fnic->fw_ack_index[0])
154 wq->ring.desc_avail += (fnic->fw_ack_index[0]
155 - wq->to_clean_index + 1);
156 else
157 wq->ring.desc_avail += (wq->ring.desc_count
158 - wq->to_clean_index
159 + fnic->fw_ack_index[0] + 1);
160
161 /*
162 * just bump clean index to ack_index+1 accounting for wraparound
163 * this will essentially free up all descriptors between
164 * to_clean_index and fw_ack_index, both inclusive
165 */
166 wq->to_clean_index =
167 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
168
169 /* we have processed the acks received so far */
170 fnic->fw_ack_recd[0] = 0;
171 return 0;
172 }
173
174
175 /**
176 * __fnic_set_state_flags
177 * Sets/Clears bits in fnic's state_flags
178 **/
179 void
180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
181 unsigned long clearbits)
182 {
183 struct Scsi_Host *host = fnic->lport->host;
184 int sh_locked = spin_is_locked(host->host_lock);
185 unsigned long flags = 0;
186
187 if (!sh_locked)
188 spin_lock_irqsave(host->host_lock, flags);
189
190 if (clearbits)
191 fnic->state_flags &= ~st_flags;
192 else
193 fnic->state_flags |= st_flags;
194
195 if (!sh_locked)
196 spin_unlock_irqrestore(host->host_lock, flags);
197
198 return;
199 }
200
201
202 /*
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
205 */
206 int fnic_fw_reset_handler(struct fnic *fnic)
207 {
208 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
209 int ret = 0;
210 unsigned long flags;
211
212 /* indicate fwreset to io path */
213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
214
215 skb_queue_purge(&fnic->frame_queue);
216 skb_queue_purge(&fnic->tx_queue);
217
218 /* wait for io cmpl */
219 while (atomic_read(&fnic->in_flight))
220 schedule_timeout(msecs_to_jiffies(1));
221
222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
223
224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
225 free_wq_copy_descs(fnic, wq);
226
227 if (!vnic_wq_copy_desc_avail(wq))
228 ret = -EAGAIN;
229 else {
230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
235 atomic64_read(
236 &fnic->fnic_stats.fw_stats.active_fw_reqs));
237 }
238
239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
240
241 if (!ret) {
242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
244 "Issued fw reset\n");
245 } else {
246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
248 "Failed to issue fw reset\n");
249 }
250
251 return ret;
252 }
253
254
255 /*
256 * fnic_flogi_reg_handler
257 * Routine to send flogi register msg to fw
258 */
259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
260 {
261 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
262 enum fcpio_flogi_reg_format_type format;
263 struct fc_lport *lp = fnic->lport;
264 u8 gw_mac[ETH_ALEN];
265 int ret = 0;
266 unsigned long flags;
267
268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
269
270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
271 free_wq_copy_descs(fnic, wq);
272
273 if (!vnic_wq_copy_desc_avail(wq)) {
274 ret = -EAGAIN;
275 goto flogi_reg_ioreq_end;
276 }
277
278 if (fnic->ctlr.map_dest) {
279 memset(gw_mac, 0xff, ETH_ALEN);
280 format = FCPIO_FLOGI_REG_DEF_DEST;
281 } else {
282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
283 format = FCPIO_FLOGI_REG_GW_DEST;
284 }
285
286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
288 fc_id, gw_mac,
289 fnic->data_src_addr,
290 lp->r_a_tov, lp->e_d_tov);
291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
293 fc_id, fnic->data_src_addr, gw_mac);
294 } else {
295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
296 format, fc_id, gw_mac);
297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
298 "FLOGI reg issued fcid %x map %d dest %pM\n",
299 fc_id, fnic->ctlr.map_dest, gw_mac);
300 }
301
302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
307
308 flogi_reg_ioreq_end:
309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
310 return ret;
311 }
312
313 /*
314 * fnic_queue_wq_copy_desc
315 * Routine to enqueue a wq copy desc
316 */
317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
318 struct vnic_wq_copy *wq,
319 struct fnic_io_req *io_req,
320 struct scsi_cmnd *sc,
321 int sg_count)
322 {
323 struct scatterlist *sg;
324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
325 struct fc_rport_libfc_priv *rp = rport->dd_data;
326 struct host_sg_desc *desc;
327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
328 unsigned int i;
329 unsigned long intr_flags;
330 int flags;
331 u8 exch_flags;
332 struct scsi_lun fc_lun;
333 int r;
334
335 if (sg_count) {
336 /* For each SGE, create a device desc entry */
337 desc = io_req->sgl_list;
338 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
339 desc->addr = cpu_to_le64(sg_dma_address(sg));
340 desc->len = cpu_to_le32(sg_dma_len(sg));
341 desc->_resvd = 0;
342 desc++;
343 }
344
345 io_req->sgl_list_pa = pci_map_single
346 (fnic->pdev,
347 io_req->sgl_list,
348 sizeof(io_req->sgl_list[0]) * sg_count,
349 PCI_DMA_TODEVICE);
350
351 r = pci_dma_mapping_error(fnic->pdev, io_req->sgl_list_pa);
352 if (r) {
353 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
354 return SCSI_MLQUEUE_HOST_BUSY;
355 }
356 }
357
358 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
359 sc->sense_buffer,
360 SCSI_SENSE_BUFFERSIZE,
361 PCI_DMA_FROMDEVICE);
362
363 r = pci_dma_mapping_error(fnic->pdev, io_req->sense_buf_pa);
364 if (r) {
365 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
366 sizeof(io_req->sgl_list[0]) * sg_count,
367 PCI_DMA_TODEVICE);
368 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
369 return SCSI_MLQUEUE_HOST_BUSY;
370 }
371
372 int_to_scsilun(sc->device->lun, &fc_lun);
373
374 /* Enqueue the descriptor in the Copy WQ */
375 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
376
377 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
378 free_wq_copy_descs(fnic, wq);
379
380 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
381 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
382 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
383 "fnic_queue_wq_copy_desc failure - no descriptors\n");
384 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
385 return SCSI_MLQUEUE_HOST_BUSY;
386 }
387
388 flags = 0;
389 if (sc->sc_data_direction == DMA_FROM_DEVICE)
390 flags = FCPIO_ICMND_RDDATA;
391 else if (sc->sc_data_direction == DMA_TO_DEVICE)
392 flags = FCPIO_ICMND_WRDATA;
393
394 exch_flags = 0;
395 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
396 (rp->flags & FC_RP_FLAGS_RETRY))
397 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
398
399 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
400 0, exch_flags, io_req->sgl_cnt,
401 SCSI_SENSE_BUFFERSIZE,
402 io_req->sgl_list_pa,
403 io_req->sense_buf_pa,
404 0, /* scsi cmd ref, always 0 */
405 FCPIO_ICMND_PTA_SIMPLE,
406 /* scsi pri and tag */
407 flags, /* command flags */
408 sc->cmnd, sc->cmd_len,
409 scsi_bufflen(sc),
410 fc_lun.scsi_lun, io_req->port_id,
411 rport->maxframe_size, rp->r_a_tov,
412 rp->e_d_tov);
413
414 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
415 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
416 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
417 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
418 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
419
420 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
421 return 0;
422 }
423
424 /*
425 * fnic_queuecommand
426 * Routine to send a scsi cdb
427 * Called with host_lock held and interrupts disabled.
428 */
429 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
430 {
431 struct fc_lport *lp = shost_priv(sc->device->host);
432 struct fc_rport *rport;
433 struct fnic_io_req *io_req = NULL;
434 struct fnic *fnic = lport_priv(lp);
435 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
436 struct vnic_wq_copy *wq;
437 int ret;
438 u64 cmd_trace;
439 int sg_count = 0;
440 unsigned long flags = 0;
441 unsigned long ptr;
442 struct fc_rport_priv *rdata;
443 spinlock_t *io_lock = NULL;
444 int io_lock_acquired = 0;
445
446 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
447 return SCSI_MLQUEUE_HOST_BUSY;
448
449 rport = starget_to_rport(scsi_target(sc->device));
450 ret = fc_remote_port_chkready(rport);
451 if (ret) {
452 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
453 sc->result = ret;
454 done(sc);
455 return 0;
456 }
457
458 rdata = lp->tt.rport_lookup(lp, rport->port_id);
459 if (!rdata || (rdata->rp_state == RPORT_ST_DELETE)) {
460 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
461 "returning IO as rport is removed\n");
462 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
463 sc->result = DID_NO_CONNECT;
464 done(sc);
465 return 0;
466 }
467
468 if (lp->state != LPORT_ST_READY || !(lp->link_up))
469 return SCSI_MLQUEUE_HOST_BUSY;
470
471 atomic_inc(&fnic->in_flight);
472
473 /*
474 * Release host lock, use driver resource specific locks from here.
475 * Don't re-enable interrupts in case they were disabled prior to the
476 * caller disabling them.
477 */
478 spin_unlock(lp->host->host_lock);
479 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
480 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
481
482 /* Get a new io_req for this SCSI IO */
483 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
484 if (!io_req) {
485 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
486 ret = SCSI_MLQUEUE_HOST_BUSY;
487 goto out;
488 }
489 memset(io_req, 0, sizeof(*io_req));
490
491 /* Map the data buffer */
492 sg_count = scsi_dma_map(sc);
493 if (sg_count < 0) {
494 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
495 sc->request->tag, sc, 0, sc->cmnd[0],
496 sg_count, CMD_STATE(sc));
497 mempool_free(io_req, fnic->io_req_pool);
498 goto out;
499 }
500
501 /* Determine the type of scatter/gather list we need */
502 io_req->sgl_cnt = sg_count;
503 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
504 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
505 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
506
507 if (sg_count) {
508 io_req->sgl_list =
509 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
510 GFP_ATOMIC);
511 if (!io_req->sgl_list) {
512 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
513 ret = SCSI_MLQUEUE_HOST_BUSY;
514 scsi_dma_unmap(sc);
515 mempool_free(io_req, fnic->io_req_pool);
516 goto out;
517 }
518
519 /* Cache sgl list allocated address before alignment */
520 io_req->sgl_list_alloc = io_req->sgl_list;
521 ptr = (unsigned long) io_req->sgl_list;
522 if (ptr % FNIC_SG_DESC_ALIGN) {
523 io_req->sgl_list = (struct host_sg_desc *)
524 (((unsigned long) ptr
525 + FNIC_SG_DESC_ALIGN - 1)
526 & ~(FNIC_SG_DESC_ALIGN - 1));
527 }
528 }
529
530 /*
531 * Will acquire lock defore setting to IO initialized.
532 */
533
534 io_lock = fnic_io_lock_hash(fnic, sc);
535 spin_lock_irqsave(io_lock, flags);
536
537 /* initialize rest of io_req */
538 io_lock_acquired = 1;
539 io_req->port_id = rport->port_id;
540 io_req->start_time = jiffies;
541 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
542 CMD_SP(sc) = (char *)io_req;
543 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
544 sc->scsi_done = done;
545
546 /* create copy wq desc and enqueue it */
547 wq = &fnic->wq_copy[0];
548 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
549 if (ret) {
550 /*
551 * In case another thread cancelled the request,
552 * refetch the pointer under the lock.
553 */
554 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
555 sc->request->tag, sc, 0, 0, 0,
556 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
557 io_req = (struct fnic_io_req *)CMD_SP(sc);
558 CMD_SP(sc) = NULL;
559 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
560 spin_unlock_irqrestore(io_lock, flags);
561 if (io_req) {
562 fnic_release_ioreq_buf(fnic, io_req, sc);
563 mempool_free(io_req, fnic->io_req_pool);
564 }
565 atomic_dec(&fnic->in_flight);
566 /* acquire host lock before returning to SCSI */
567 spin_lock(lp->host->host_lock);
568 return ret;
569 } else {
570 atomic64_inc(&fnic_stats->io_stats.active_ios);
571 atomic64_inc(&fnic_stats->io_stats.num_ios);
572 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
573 atomic64_read(&fnic_stats->io_stats.max_active_ios))
574 atomic64_set(&fnic_stats->io_stats.max_active_ios,
575 atomic64_read(&fnic_stats->io_stats.active_ios));
576
577 /* REVISIT: Use per IO lock in the final code */
578 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
579 }
580 out:
581 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
582 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
583 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
584 sc->cmnd[5]);
585
586 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
587 sc->request->tag, sc, io_req,
588 sg_count, cmd_trace,
589 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
590
591 /* if only we issued IO, will we have the io lock */
592 if (io_lock_acquired)
593 spin_unlock_irqrestore(io_lock, flags);
594
595 atomic_dec(&fnic->in_flight);
596 /* acquire host lock before returning to SCSI */
597 spin_lock(lp->host->host_lock);
598 return ret;
599 }
600
601 DEF_SCSI_QCMD(fnic_queuecommand)
602
603 /*
604 * fnic_fcpio_fw_reset_cmpl_handler
605 * Routine to handle fw reset completion
606 */
607 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
608 struct fcpio_fw_req *desc)
609 {
610 u8 type;
611 u8 hdr_status;
612 struct fcpio_tag tag;
613 int ret = 0;
614 unsigned long flags;
615 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
616
617 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
618
619 atomic64_inc(&reset_stats->fw_reset_completions);
620
621 /* Clean up all outstanding io requests */
622 fnic_cleanup_io(fnic, SCSI_NO_TAG);
623
624 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
625 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
626
627 spin_lock_irqsave(&fnic->fnic_lock, flags);
628
629 /* fnic should be in FC_TRANS_ETH_MODE */
630 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
631 /* Check status of reset completion */
632 if (!hdr_status) {
633 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
634 "reset cmpl success\n");
635 /* Ready to send flogi out */
636 fnic->state = FNIC_IN_ETH_MODE;
637 } else {
638 FNIC_SCSI_DBG(KERN_DEBUG,
639 fnic->lport->host,
640 "fnic fw_reset : failed %s\n",
641 fnic_fcpio_status_to_str(hdr_status));
642
643 /*
644 * Unable to change to eth mode, cannot send out flogi
645 * Change state to fc mode, so that subsequent Flogi
646 * requests from libFC will cause more attempts to
647 * reset the firmware. Free the cached flogi
648 */
649 fnic->state = FNIC_IN_FC_MODE;
650 atomic64_inc(&reset_stats->fw_reset_failures);
651 ret = -1;
652 }
653 } else {
654 FNIC_SCSI_DBG(KERN_DEBUG,
655 fnic->lport->host,
656 "Unexpected state %s while processing"
657 " reset cmpl\n", fnic_state_to_str(fnic->state));
658 atomic64_inc(&reset_stats->fw_reset_failures);
659 ret = -1;
660 }
661
662 /* Thread removing device blocks till firmware reset is complete */
663 if (fnic->remove_wait)
664 complete(fnic->remove_wait);
665
666 /*
667 * If fnic is being removed, or fw reset failed
668 * free the flogi frame. Else, send it out
669 */
670 if (fnic->remove_wait || ret) {
671 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
672 skb_queue_purge(&fnic->tx_queue);
673 goto reset_cmpl_handler_end;
674 }
675
676 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
677
678 fnic_flush_tx(fnic);
679
680 reset_cmpl_handler_end:
681 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
682
683 return ret;
684 }
685
686 /*
687 * fnic_fcpio_flogi_reg_cmpl_handler
688 * Routine to handle flogi register completion
689 */
690 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
691 struct fcpio_fw_req *desc)
692 {
693 u8 type;
694 u8 hdr_status;
695 struct fcpio_tag tag;
696 int ret = 0;
697 unsigned long flags;
698
699 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
700
701 /* Update fnic state based on status of flogi reg completion */
702 spin_lock_irqsave(&fnic->fnic_lock, flags);
703
704 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
705
706 /* Check flogi registration completion status */
707 if (!hdr_status) {
708 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
709 "flog reg succeeded\n");
710 fnic->state = FNIC_IN_FC_MODE;
711 } else {
712 FNIC_SCSI_DBG(KERN_DEBUG,
713 fnic->lport->host,
714 "fnic flogi reg :failed %s\n",
715 fnic_fcpio_status_to_str(hdr_status));
716 fnic->state = FNIC_IN_ETH_MODE;
717 ret = -1;
718 }
719 } else {
720 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
721 "Unexpected fnic state %s while"
722 " processing flogi reg completion\n",
723 fnic_state_to_str(fnic->state));
724 ret = -1;
725 }
726
727 if (!ret) {
728 if (fnic->stop_rx_link_events) {
729 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
730 goto reg_cmpl_handler_end;
731 }
732 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
733
734 fnic_flush_tx(fnic);
735 queue_work(fnic_event_queue, &fnic->frame_work);
736 } else {
737 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
738 }
739
740 reg_cmpl_handler_end:
741 return ret;
742 }
743
744 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
745 u16 request_out)
746 {
747 if (wq->to_clean_index <= wq->to_use_index) {
748 /* out of range, stale request_out index */
749 if (request_out < wq->to_clean_index ||
750 request_out >= wq->to_use_index)
751 return 0;
752 } else {
753 /* out of range, stale request_out index */
754 if (request_out < wq->to_clean_index &&
755 request_out >= wq->to_use_index)
756 return 0;
757 }
758 /* request_out index is in range */
759 return 1;
760 }
761
762
763 /*
764 * Mark that ack received and store the Ack index. If there are multiple
765 * acks received before Tx thread cleans it up, the latest value will be
766 * used which is correct behavior. This state should be in the copy Wq
767 * instead of in the fnic
768 */
769 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
770 unsigned int cq_index,
771 struct fcpio_fw_req *desc)
772 {
773 struct vnic_wq_copy *wq;
774 u16 request_out = desc->u.ack.request_out;
775 unsigned long flags;
776 u64 *ox_id_tag = (u64 *)(void *)desc;
777
778 /* mark the ack state */
779 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
780 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
781
782 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
783 if (is_ack_index_in_range(wq, request_out)) {
784 fnic->fw_ack_index[0] = request_out;
785 fnic->fw_ack_recd[0] = 1;
786 } else
787 atomic64_inc(
788 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
789
790 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
791 FNIC_TRACE(fnic_fcpio_ack_handler,
792 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
793 ox_id_tag[4], ox_id_tag[5]);
794 }
795
796 /*
797 * fnic_fcpio_icmnd_cmpl_handler
798 * Routine to handle icmnd completions
799 */
800 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
801 struct fcpio_fw_req *desc)
802 {
803 u8 type;
804 u8 hdr_status;
805 struct fcpio_tag tag;
806 u32 id;
807 u64 xfer_len = 0;
808 struct fcpio_icmnd_cmpl *icmnd_cmpl;
809 struct fnic_io_req *io_req;
810 struct scsi_cmnd *sc;
811 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
812 unsigned long flags;
813 spinlock_t *io_lock;
814 u64 cmd_trace;
815 unsigned long start_time;
816
817 /* Decode the cmpl description to get the io_req id */
818 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
819 fcpio_tag_id_dec(&tag, &id);
820 icmnd_cmpl = &desc->u.icmnd_cmpl;
821
822 if (id >= fnic->fnic_max_tag_id) {
823 shost_printk(KERN_ERR, fnic->lport->host,
824 "Tag out of range tag %x hdr status = %s\n",
825 id, fnic_fcpio_status_to_str(hdr_status));
826 return;
827 }
828
829 sc = scsi_host_find_tag(fnic->lport->host, id);
830 WARN_ON_ONCE(!sc);
831 if (!sc) {
832 atomic64_inc(&fnic_stats->io_stats.sc_null);
833 shost_printk(KERN_ERR, fnic->lport->host,
834 "icmnd_cmpl sc is null - "
835 "hdr status = %s tag = 0x%x desc = 0x%p\n",
836 fnic_fcpio_status_to_str(hdr_status), id, desc);
837 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
838 fnic->lport->host->host_no, id,
839 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
840 (u64)icmnd_cmpl->_resvd0[0]),
841 ((u64)hdr_status << 16 |
842 (u64)icmnd_cmpl->scsi_status << 8 |
843 (u64)icmnd_cmpl->flags), desc,
844 (u64)icmnd_cmpl->residual, 0);
845 return;
846 }
847
848 io_lock = fnic_io_lock_hash(fnic, sc);
849 spin_lock_irqsave(io_lock, flags);
850 io_req = (struct fnic_io_req *)CMD_SP(sc);
851 WARN_ON_ONCE(!io_req);
852 if (!io_req) {
853 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
854 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
855 spin_unlock_irqrestore(io_lock, flags);
856 shost_printk(KERN_ERR, fnic->lport->host,
857 "icmnd_cmpl io_req is null - "
858 "hdr status = %s tag = 0x%x sc 0x%p\n",
859 fnic_fcpio_status_to_str(hdr_status), id, sc);
860 return;
861 }
862 start_time = io_req->start_time;
863
864 /* firmware completed the io */
865 io_req->io_completed = 1;
866
867 /*
868 * if SCSI-ML has already issued abort on this command,
869 * ignore completion of the IO. The abts path will clean it up
870 */
871 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
872 spin_unlock_irqrestore(io_lock, flags);
873 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
874 switch (hdr_status) {
875 case FCPIO_SUCCESS:
876 CMD_FLAGS(sc) |= FNIC_IO_DONE;
877 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
878 "icmnd_cmpl ABTS pending hdr status = %s "
879 "sc 0x%p scsi_status %x residual %d\n",
880 fnic_fcpio_status_to_str(hdr_status), sc,
881 icmnd_cmpl->scsi_status,
882 icmnd_cmpl->residual);
883 break;
884 case FCPIO_ABORTED:
885 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
886 break;
887 default:
888 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
889 "icmnd_cmpl abts pending "
890 "hdr status = %s tag = 0x%x sc = 0x%p\n",
891 fnic_fcpio_status_to_str(hdr_status),
892 id, sc);
893 break;
894 }
895 return;
896 }
897
898 /* Mark the IO as complete */
899 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
900
901 icmnd_cmpl = &desc->u.icmnd_cmpl;
902
903 switch (hdr_status) {
904 case FCPIO_SUCCESS:
905 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
906 xfer_len = scsi_bufflen(sc);
907 scsi_set_resid(sc, icmnd_cmpl->residual);
908
909 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
910 xfer_len -= icmnd_cmpl->residual;
911
912 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
913 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
914 break;
915
916 case FCPIO_TIMEOUT: /* request was timed out */
917 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
918 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
919 break;
920
921 case FCPIO_ABORTED: /* request was aborted */
922 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
923 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
924 break;
925
926 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
927 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
928 scsi_set_resid(sc, icmnd_cmpl->residual);
929 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
930 break;
931
932 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
933 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
934 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
935 break;
936
937 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
938 atomic64_inc(&fnic_stats->io_stats.io_not_found);
939 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
940 break;
941
942 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
943 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
944 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
945 break;
946
947 case FCPIO_FW_ERR: /* request was terminated due fw error */
948 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
949 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
950 break;
951
952 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
953 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
954 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
955 break;
956
957 case FCPIO_INVALID_HEADER: /* header contains invalid data */
958 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
959 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
960 default:
961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
962 break;
963 }
964
965 /* Break link with the SCSI command */
966 CMD_SP(sc) = NULL;
967 CMD_FLAGS(sc) |= FNIC_IO_DONE;
968
969 spin_unlock_irqrestore(io_lock, flags);
970
971 if (hdr_status != FCPIO_SUCCESS) {
972 atomic64_inc(&fnic_stats->io_stats.io_failures);
973 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
974 fnic_fcpio_status_to_str(hdr_status));
975 }
976
977 fnic_release_ioreq_buf(fnic, io_req, sc);
978
979 mempool_free(io_req, fnic->io_req_pool);
980
981 cmd_trace = ((u64)hdr_status << 56) |
982 (u64)icmnd_cmpl->scsi_status << 48 |
983 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
984 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
985 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
986
987 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
988 sc->device->host->host_no, id, sc,
989 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
990 (u64)icmnd_cmpl->_resvd0[0] << 48 |
991 jiffies_to_msecs(jiffies - start_time)),
992 desc, cmd_trace,
993 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
994
995 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
996 fnic->lport->host_stats.fcp_input_requests++;
997 fnic->fcp_input_bytes += xfer_len;
998 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
999 fnic->lport->host_stats.fcp_output_requests++;
1000 fnic->fcp_output_bytes += xfer_len;
1001 } else
1002 fnic->lport->host_stats.fcp_control_requests++;
1003
1004 atomic64_dec(&fnic_stats->io_stats.active_ios);
1005 if (atomic64_read(&fnic->io_cmpl_skip))
1006 atomic64_dec(&fnic->io_cmpl_skip);
1007 else
1008 atomic64_inc(&fnic_stats->io_stats.io_completions);
1009
1010 /* Call SCSI completion function to complete the IO */
1011 if (sc->scsi_done)
1012 sc->scsi_done(sc);
1013 }
1014
1015 /* fnic_fcpio_itmf_cmpl_handler
1016 * Routine to handle itmf completions
1017 */
1018 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1019 struct fcpio_fw_req *desc)
1020 {
1021 u8 type;
1022 u8 hdr_status;
1023 struct fcpio_tag tag;
1024 u32 id;
1025 struct scsi_cmnd *sc;
1026 struct fnic_io_req *io_req;
1027 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1028 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1029 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1030 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1031 unsigned long flags;
1032 spinlock_t *io_lock;
1033 unsigned long start_time;
1034
1035 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1036 fcpio_tag_id_dec(&tag, &id);
1037
1038 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1039 shost_printk(KERN_ERR, fnic->lport->host,
1040 "Tag out of range tag %x hdr status = %s\n",
1041 id, fnic_fcpio_status_to_str(hdr_status));
1042 return;
1043 }
1044
1045 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1046 WARN_ON_ONCE(!sc);
1047 if (!sc) {
1048 atomic64_inc(&fnic_stats->io_stats.sc_null);
1049 shost_printk(KERN_ERR, fnic->lport->host,
1050 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1051 fnic_fcpio_status_to_str(hdr_status), id);
1052 return;
1053 }
1054 io_lock = fnic_io_lock_hash(fnic, sc);
1055 spin_lock_irqsave(io_lock, flags);
1056 io_req = (struct fnic_io_req *)CMD_SP(sc);
1057 WARN_ON_ONCE(!io_req);
1058 if (!io_req) {
1059 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1060 spin_unlock_irqrestore(io_lock, flags);
1061 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1062 shost_printk(KERN_ERR, fnic->lport->host,
1063 "itmf_cmpl io_req is null - "
1064 "hdr status = %s tag = 0x%x sc 0x%p\n",
1065 fnic_fcpio_status_to_str(hdr_status), id, sc);
1066 return;
1067 }
1068 start_time = io_req->start_time;
1069
1070 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1071 /* Abort and terminate completion of device reset req */
1072 /* REVISIT : Add asserts about various flags */
1073 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1074 "dev reset abts cmpl recd. id %x status %s\n",
1075 id, fnic_fcpio_status_to_str(hdr_status));
1076 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1077 CMD_ABTS_STATUS(sc) = hdr_status;
1078 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1079 if (io_req->abts_done)
1080 complete(io_req->abts_done);
1081 spin_unlock_irqrestore(io_lock, flags);
1082 } else if (id & FNIC_TAG_ABORT) {
1083 /* Completion of abort cmd */
1084 switch (hdr_status) {
1085 case FCPIO_SUCCESS:
1086 break;
1087 case FCPIO_TIMEOUT:
1088 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1089 atomic64_inc(&abts_stats->abort_fw_timeouts);
1090 else
1091 atomic64_inc(
1092 &term_stats->terminate_fw_timeouts);
1093 break;
1094 case FCPIO_IO_NOT_FOUND:
1095 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1096 atomic64_inc(&abts_stats->abort_io_not_found);
1097 else
1098 atomic64_inc(
1099 &term_stats->terminate_io_not_found);
1100 break;
1101 default:
1102 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1103 atomic64_inc(&abts_stats->abort_failures);
1104 else
1105 atomic64_inc(
1106 &term_stats->terminate_failures);
1107 break;
1108 }
1109 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1110 /* This is a late completion. Ignore it */
1111 spin_unlock_irqrestore(io_lock, flags);
1112 return;
1113 }
1114 CMD_ABTS_STATUS(sc) = hdr_status;
1115 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1116
1117 atomic64_dec(&fnic_stats->io_stats.active_ios);
1118 if (atomic64_read(&fnic->io_cmpl_skip))
1119 atomic64_dec(&fnic->io_cmpl_skip);
1120 else
1121 atomic64_inc(&fnic_stats->io_stats.io_completions);
1122
1123 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1124 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1125
1126 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1127 "abts cmpl recd. id %d status %s\n",
1128 (int)(id & FNIC_TAG_MASK),
1129 fnic_fcpio_status_to_str(hdr_status));
1130
1131 /*
1132 * If scsi_eh thread is blocked waiting for abts to complete,
1133 * signal completion to it. IO will be cleaned in the thread
1134 * else clean it in this context
1135 */
1136 if (io_req->abts_done) {
1137 complete(io_req->abts_done);
1138 spin_unlock_irqrestore(io_lock, flags);
1139 } else {
1140 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1141 "abts cmpl, completing IO\n");
1142 CMD_SP(sc) = NULL;
1143 sc->result = (DID_ERROR << 16);
1144
1145 spin_unlock_irqrestore(io_lock, flags);
1146
1147 fnic_release_ioreq_buf(fnic, io_req, sc);
1148 mempool_free(io_req, fnic->io_req_pool);
1149 if (sc->scsi_done) {
1150 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1151 sc->device->host->host_no, id,
1152 sc,
1153 jiffies_to_msecs(jiffies - start_time),
1154 desc,
1155 (((u64)hdr_status << 40) |
1156 (u64)sc->cmnd[0] << 32 |
1157 (u64)sc->cmnd[2] << 24 |
1158 (u64)sc->cmnd[3] << 16 |
1159 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1160 (((u64)CMD_FLAGS(sc) << 32) |
1161 CMD_STATE(sc)));
1162 sc->scsi_done(sc);
1163 }
1164 }
1165
1166 } else if (id & FNIC_TAG_DEV_RST) {
1167 /* Completion of device reset */
1168 CMD_LR_STATUS(sc) = hdr_status;
1169 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1170 spin_unlock_irqrestore(io_lock, flags);
1171 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
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 "Terminate pending "
1179 "dev reset cmpl recd. id %d status %s\n",
1180 (int)(id & FNIC_TAG_MASK),
1181 fnic_fcpio_status_to_str(hdr_status));
1182 return;
1183 }
1184 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1185 /* Need to wait for terminate completion */
1186 spin_unlock_irqrestore(io_lock, flags);
1187 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1188 sc->device->host->host_no, id, sc,
1189 jiffies_to_msecs(jiffies - start_time),
1190 desc, 0,
1191 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1192 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1193 "dev reset cmpl recd after time out. "
1194 "id %d status %s\n",
1195 (int)(id & FNIC_TAG_MASK),
1196 fnic_fcpio_status_to_str(hdr_status));
1197 return;
1198 }
1199 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1200 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1201 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1202 "dev reset cmpl recd. id %d status %s\n",
1203 (int)(id & FNIC_TAG_MASK),
1204 fnic_fcpio_status_to_str(hdr_status));
1205 if (io_req->dr_done)
1206 complete(io_req->dr_done);
1207 spin_unlock_irqrestore(io_lock, flags);
1208
1209 } else {
1210 shost_printk(KERN_ERR, fnic->lport->host,
1211 "Unexpected itmf io state %s tag %x\n",
1212 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1213 spin_unlock_irqrestore(io_lock, flags);
1214 }
1215
1216 }
1217
1218 /*
1219 * fnic_fcpio_cmpl_handler
1220 * Routine to service the cq for wq_copy
1221 */
1222 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1223 unsigned int cq_index,
1224 struct fcpio_fw_req *desc)
1225 {
1226 struct fnic *fnic = vnic_dev_priv(vdev);
1227
1228 switch (desc->hdr.type) {
1229 case FCPIO_ICMND_CMPL: /* fw completed a command */
1230 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1231 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1232 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1233 case FCPIO_RESET_CMPL: /* fw completed reset */
1234 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1235 break;
1236 default:
1237 break;
1238 }
1239
1240 switch (desc->hdr.type) {
1241 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1242 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1243 break;
1244
1245 case FCPIO_ICMND_CMPL: /* fw completed a command */
1246 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1247 break;
1248
1249 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1250 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1251 break;
1252
1253 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1254 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1255 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1256 break;
1257
1258 case FCPIO_RESET_CMPL: /* fw completed reset */
1259 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1260 break;
1261
1262 default:
1263 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1264 "firmware completion type %d\n",
1265 desc->hdr.type);
1266 break;
1267 }
1268
1269 return 0;
1270 }
1271
1272 /*
1273 * fnic_wq_copy_cmpl_handler
1274 * Routine to process wq copy
1275 */
1276 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1277 {
1278 unsigned int wq_work_done = 0;
1279 unsigned int i, cq_index;
1280 unsigned int cur_work_done;
1281
1282 for (i = 0; i < fnic->wq_copy_count; i++) {
1283 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1284 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1285 fnic_fcpio_cmpl_handler,
1286 copy_work_to_do);
1287 wq_work_done += cur_work_done;
1288 }
1289 return wq_work_done;
1290 }
1291
1292 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1293 {
1294 int i;
1295 struct fnic_io_req *io_req;
1296 unsigned long flags = 0;
1297 struct scsi_cmnd *sc;
1298 spinlock_t *io_lock;
1299 unsigned long start_time = 0;
1300 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1301
1302 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1303 if (i == exclude_id)
1304 continue;
1305
1306 io_lock = fnic_io_lock_tag(fnic, i);
1307 spin_lock_irqsave(io_lock, flags);
1308 sc = scsi_host_find_tag(fnic->lport->host, i);
1309 if (!sc) {
1310 spin_unlock_irqrestore(io_lock, flags);
1311 continue;
1312 }
1313
1314 io_req = (struct fnic_io_req *)CMD_SP(sc);
1315 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1316 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1317 /*
1318 * We will be here only when FW completes reset
1319 * without sending completions for outstanding ios.
1320 */
1321 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1322 if (io_req && io_req->dr_done)
1323 complete(io_req->dr_done);
1324 else if (io_req && io_req->abts_done)
1325 complete(io_req->abts_done);
1326 spin_unlock_irqrestore(io_lock, flags);
1327 continue;
1328 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1329 spin_unlock_irqrestore(io_lock, flags);
1330 continue;
1331 }
1332 if (!io_req) {
1333 spin_unlock_irqrestore(io_lock, flags);
1334 goto cleanup_scsi_cmd;
1335 }
1336
1337 CMD_SP(sc) = NULL;
1338
1339 spin_unlock_irqrestore(io_lock, flags);
1340
1341 /*
1342 * If there is a scsi_cmnd associated with this io_req, then
1343 * free the corresponding state
1344 */
1345 start_time = io_req->start_time;
1346 fnic_release_ioreq_buf(fnic, io_req, sc);
1347 mempool_free(io_req, fnic->io_req_pool);
1348
1349 cleanup_scsi_cmd:
1350 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1351 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1352 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n",
1353 __func__, (jiffies - start_time));
1354
1355 if (atomic64_read(&fnic->io_cmpl_skip))
1356 atomic64_dec(&fnic->io_cmpl_skip);
1357 else
1358 atomic64_inc(&fnic_stats->io_stats.io_completions);
1359
1360 /* Complete the command to SCSI */
1361 if (sc->scsi_done) {
1362 FNIC_TRACE(fnic_cleanup_io,
1363 sc->device->host->host_no, i, sc,
1364 jiffies_to_msecs(jiffies - start_time),
1365 0, ((u64)sc->cmnd[0] << 32 |
1366 (u64)sc->cmnd[2] << 24 |
1367 (u64)sc->cmnd[3] << 16 |
1368 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1369 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1370
1371 sc->scsi_done(sc);
1372 }
1373 }
1374 }
1375
1376 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1377 struct fcpio_host_req *desc)
1378 {
1379 u32 id;
1380 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1381 struct fnic_io_req *io_req;
1382 struct scsi_cmnd *sc;
1383 unsigned long flags;
1384 spinlock_t *io_lock;
1385 unsigned long start_time = 0;
1386
1387 /* get the tag reference */
1388 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1389 id &= FNIC_TAG_MASK;
1390
1391 if (id >= fnic->fnic_max_tag_id)
1392 return;
1393
1394 sc = scsi_host_find_tag(fnic->lport->host, id);
1395 if (!sc)
1396 return;
1397
1398 io_lock = fnic_io_lock_hash(fnic, sc);
1399 spin_lock_irqsave(io_lock, flags);
1400
1401 /* Get the IO context which this desc refers to */
1402 io_req = (struct fnic_io_req *)CMD_SP(sc);
1403
1404 /* fnic interrupts are turned off by now */
1405
1406 if (!io_req) {
1407 spin_unlock_irqrestore(io_lock, flags);
1408 goto wq_copy_cleanup_scsi_cmd;
1409 }
1410
1411 CMD_SP(sc) = NULL;
1412
1413 spin_unlock_irqrestore(io_lock, flags);
1414
1415 start_time = io_req->start_time;
1416 fnic_release_ioreq_buf(fnic, io_req, sc);
1417 mempool_free(io_req, fnic->io_req_pool);
1418
1419 wq_copy_cleanup_scsi_cmd:
1420 sc->result = DID_NO_CONNECT << 16;
1421 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1422 " DID_NO_CONNECT\n");
1423
1424 if (sc->scsi_done) {
1425 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1426 sc->device->host->host_no, id, sc,
1427 jiffies_to_msecs(jiffies - start_time),
1428 0, ((u64)sc->cmnd[0] << 32 |
1429 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1430 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1431 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1432
1433 sc->scsi_done(sc);
1434 }
1435 }
1436
1437 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1438 u32 task_req, u8 *fc_lun,
1439 struct fnic_io_req *io_req)
1440 {
1441 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1442 struct Scsi_Host *host = fnic->lport->host;
1443 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1444 unsigned long flags;
1445
1446 spin_lock_irqsave(host->host_lock, flags);
1447 if (unlikely(fnic_chk_state_flags_locked(fnic,
1448 FNIC_FLAGS_IO_BLOCKED))) {
1449 spin_unlock_irqrestore(host->host_lock, flags);
1450 return 1;
1451 } else
1452 atomic_inc(&fnic->in_flight);
1453 spin_unlock_irqrestore(host->host_lock, flags);
1454
1455 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1456
1457 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1458 free_wq_copy_descs(fnic, wq);
1459
1460 if (!vnic_wq_copy_desc_avail(wq)) {
1461 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1462 atomic_dec(&fnic->in_flight);
1463 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1464 "fnic_queue_abort_io_req: failure: no descriptors\n");
1465 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1466 return 1;
1467 }
1468 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1469 0, task_req, tag, fc_lun, io_req->port_id,
1470 fnic->config.ra_tov, fnic->config.ed_tov);
1471
1472 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1473 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1474 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1475 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1476 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1477
1478 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1479 atomic_dec(&fnic->in_flight);
1480
1481 return 0;
1482 }
1483
1484 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1485 {
1486 int tag;
1487 int abt_tag;
1488 int term_cnt = 0;
1489 struct fnic_io_req *io_req;
1490 spinlock_t *io_lock;
1491 unsigned long flags;
1492 struct scsi_cmnd *sc;
1493 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1494 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1495 struct scsi_lun fc_lun;
1496 enum fnic_ioreq_state old_ioreq_state;
1497
1498 FNIC_SCSI_DBG(KERN_DEBUG,
1499 fnic->lport->host,
1500 "fnic_rport_exch_reset called portid 0x%06x\n",
1501 port_id);
1502
1503 if (fnic->in_remove)
1504 return;
1505
1506 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1507 abt_tag = tag;
1508 io_lock = fnic_io_lock_tag(fnic, tag);
1509 spin_lock_irqsave(io_lock, flags);
1510 sc = scsi_host_find_tag(fnic->lport->host, tag);
1511 if (!sc) {
1512 spin_unlock_irqrestore(io_lock, flags);
1513 continue;
1514 }
1515
1516 io_req = (struct fnic_io_req *)CMD_SP(sc);
1517
1518 if (!io_req || io_req->port_id != port_id) {
1519 spin_unlock_irqrestore(io_lock, flags);
1520 continue;
1521 }
1522
1523 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1524 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1525 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1526 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1527 sc);
1528 spin_unlock_irqrestore(io_lock, flags);
1529 continue;
1530 }
1531
1532 /*
1533 * Found IO that is still pending with firmware and
1534 * belongs to rport that went away
1535 */
1536 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1537 spin_unlock_irqrestore(io_lock, flags);
1538 continue;
1539 }
1540 if (io_req->abts_done) {
1541 shost_printk(KERN_ERR, fnic->lport->host,
1542 "fnic_rport_exch_reset: io_req->abts_done is set "
1543 "state is %s\n",
1544 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1545 }
1546
1547 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1548 shost_printk(KERN_ERR, fnic->lport->host,
1549 "rport_exch_reset "
1550 "IO not yet issued %p tag 0x%x flags "
1551 "%x state %d\n",
1552 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1553 }
1554 old_ioreq_state = CMD_STATE(sc);
1555 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1556 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1557 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1558 atomic64_inc(&reset_stats->device_reset_terminates);
1559 abt_tag = (tag | FNIC_TAG_DEV_RST);
1560 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1561 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1562 sc);
1563 }
1564
1565 BUG_ON(io_req->abts_done);
1566
1567 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1568 "fnic_rport_reset_exch: Issuing abts\n");
1569
1570 spin_unlock_irqrestore(io_lock, flags);
1571
1572 /* Now queue the abort command to firmware */
1573 int_to_scsilun(sc->device->lun, &fc_lun);
1574
1575 if (fnic_queue_abort_io_req(fnic, abt_tag,
1576 FCPIO_ITMF_ABT_TASK_TERM,
1577 fc_lun.scsi_lun, io_req)) {
1578 /*
1579 * Revert the cmd state back to old state, if
1580 * it hasn't changed in between. This cmd will get
1581 * aborted later by scsi_eh, or cleaned up during
1582 * lun reset
1583 */
1584 spin_lock_irqsave(io_lock, flags);
1585 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1586 CMD_STATE(sc) = old_ioreq_state;
1587 spin_unlock_irqrestore(io_lock, flags);
1588 } else {
1589 spin_lock_irqsave(io_lock, flags);
1590 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1591 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1592 else
1593 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1594 spin_unlock_irqrestore(io_lock, flags);
1595 atomic64_inc(&term_stats->terminates);
1596 term_cnt++;
1597 }
1598 }
1599 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1600 atomic64_set(&term_stats->max_terminates, term_cnt);
1601
1602 }
1603
1604 void fnic_terminate_rport_io(struct fc_rport *rport)
1605 {
1606 int tag;
1607 int abt_tag;
1608 int term_cnt = 0;
1609 struct fnic_io_req *io_req;
1610 spinlock_t *io_lock;
1611 unsigned long flags;
1612 struct scsi_cmnd *sc;
1613 struct scsi_lun fc_lun;
1614 struct fc_rport_libfc_priv *rdata;
1615 struct fc_lport *lport;
1616 struct fnic *fnic;
1617 struct fc_rport *cmd_rport;
1618 struct reset_stats *reset_stats;
1619 struct terminate_stats *term_stats;
1620 enum fnic_ioreq_state old_ioreq_state;
1621
1622 if (!rport) {
1623 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1624 return;
1625 }
1626 rdata = rport->dd_data;
1627
1628 if (!rdata) {
1629 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1630 return;
1631 }
1632 lport = rdata->local_port;
1633
1634 if (!lport) {
1635 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1636 return;
1637 }
1638 fnic = lport_priv(lport);
1639 FNIC_SCSI_DBG(KERN_DEBUG,
1640 fnic->lport->host, "fnic_terminate_rport_io called"
1641 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1642 rport->port_name, rport->node_name, rport,
1643 rport->port_id);
1644
1645 if (fnic->in_remove)
1646 return;
1647
1648 reset_stats = &fnic->fnic_stats.reset_stats;
1649 term_stats = &fnic->fnic_stats.term_stats;
1650
1651 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1652 abt_tag = tag;
1653 io_lock = fnic_io_lock_tag(fnic, tag);
1654 spin_lock_irqsave(io_lock, flags);
1655 sc = scsi_host_find_tag(fnic->lport->host, tag);
1656 if (!sc) {
1657 spin_unlock_irqrestore(io_lock, flags);
1658 continue;
1659 }
1660
1661 cmd_rport = starget_to_rport(scsi_target(sc->device));
1662 if (rport != cmd_rport) {
1663 spin_unlock_irqrestore(io_lock, flags);
1664 continue;
1665 }
1666
1667 io_req = (struct fnic_io_req *)CMD_SP(sc);
1668
1669 if (!io_req || rport != cmd_rport) {
1670 spin_unlock_irqrestore(io_lock, flags);
1671 continue;
1672 }
1673
1674 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1675 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1676 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1677 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1678 sc);
1679 spin_unlock_irqrestore(io_lock, flags);
1680 continue;
1681 }
1682 /*
1683 * Found IO that is still pending with firmware and
1684 * belongs to rport that went away
1685 */
1686 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1687 spin_unlock_irqrestore(io_lock, flags);
1688 continue;
1689 }
1690 if (io_req->abts_done) {
1691 shost_printk(KERN_ERR, fnic->lport->host,
1692 "fnic_terminate_rport_io: io_req->abts_done is set "
1693 "state is %s\n",
1694 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1695 }
1696 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1697 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1698 "fnic_terminate_rport_io "
1699 "IO not yet issued %p tag 0x%x flags "
1700 "%x state %d\n",
1701 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1702 }
1703 old_ioreq_state = CMD_STATE(sc);
1704 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1705 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1706 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1707 atomic64_inc(&reset_stats->device_reset_terminates);
1708 abt_tag = (tag | FNIC_TAG_DEV_RST);
1709 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1710 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1711 }
1712
1713 BUG_ON(io_req->abts_done);
1714
1715 FNIC_SCSI_DBG(KERN_DEBUG,
1716 fnic->lport->host,
1717 "fnic_terminate_rport_io: Issuing abts\n");
1718
1719 spin_unlock_irqrestore(io_lock, flags);
1720
1721 /* Now queue the abort command to firmware */
1722 int_to_scsilun(sc->device->lun, &fc_lun);
1723
1724 if (fnic_queue_abort_io_req(fnic, abt_tag,
1725 FCPIO_ITMF_ABT_TASK_TERM,
1726 fc_lun.scsi_lun, io_req)) {
1727 /*
1728 * Revert the cmd state back to old state, if
1729 * it hasn't changed in between. This cmd will get
1730 * aborted later by scsi_eh, or cleaned up during
1731 * lun reset
1732 */
1733 spin_lock_irqsave(io_lock, flags);
1734 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1735 CMD_STATE(sc) = old_ioreq_state;
1736 spin_unlock_irqrestore(io_lock, flags);
1737 } else {
1738 spin_lock_irqsave(io_lock, flags);
1739 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1740 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1741 else
1742 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1743 spin_unlock_irqrestore(io_lock, flags);
1744 atomic64_inc(&term_stats->terminates);
1745 term_cnt++;
1746 }
1747 }
1748 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1749 atomic64_set(&term_stats->max_terminates, term_cnt);
1750
1751 }
1752
1753 /*
1754 * This function is exported to SCSI for sending abort cmnds.
1755 * A SCSI IO is represented by a io_req in the driver.
1756 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1757 */
1758 int fnic_abort_cmd(struct scsi_cmnd *sc)
1759 {
1760 struct fc_lport *lp;
1761 struct fnic *fnic;
1762 struct fnic_io_req *io_req = NULL;
1763 struct fc_rport *rport;
1764 spinlock_t *io_lock;
1765 unsigned long flags;
1766 unsigned long start_time = 0;
1767 int ret = SUCCESS;
1768 u32 task_req = 0;
1769 struct scsi_lun fc_lun;
1770 struct fnic_stats *fnic_stats;
1771 struct abort_stats *abts_stats;
1772 struct terminate_stats *term_stats;
1773 enum fnic_ioreq_state old_ioreq_state;
1774 int tag;
1775 DECLARE_COMPLETION_ONSTACK(tm_done);
1776
1777 /* Wait for rport to unblock */
1778 fc_block_scsi_eh(sc);
1779
1780 /* Get local-port, check ready and link up */
1781 lp = shost_priv(sc->device->host);
1782
1783 fnic = lport_priv(lp);
1784 fnic_stats = &fnic->fnic_stats;
1785 abts_stats = &fnic->fnic_stats.abts_stats;
1786 term_stats = &fnic->fnic_stats.term_stats;
1787
1788 rport = starget_to_rport(scsi_target(sc->device));
1789 tag = sc->request->tag;
1790 FNIC_SCSI_DBG(KERN_DEBUG,
1791 fnic->lport->host,
1792 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1793 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1794
1795 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1796
1797 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1798 ret = FAILED;
1799 goto fnic_abort_cmd_end;
1800 }
1801
1802 /*
1803 * Avoid a race between SCSI issuing the abort and the device
1804 * completing the command.
1805 *
1806 * If the command is already completed by the fw cmpl code,
1807 * we just return SUCCESS from here. This means that the abort
1808 * succeeded. In the SCSI ML, since the timeout for command has
1809 * happened, the completion wont actually complete the command
1810 * and it will be considered as an aborted command
1811 *
1812 * The CMD_SP will not be cleared except while holding io_req_lock.
1813 */
1814 io_lock = fnic_io_lock_hash(fnic, sc);
1815 spin_lock_irqsave(io_lock, flags);
1816 io_req = (struct fnic_io_req *)CMD_SP(sc);
1817 if (!io_req) {
1818 spin_unlock_irqrestore(io_lock, flags);
1819 goto fnic_abort_cmd_end;
1820 }
1821
1822 io_req->abts_done = &tm_done;
1823
1824 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1825 spin_unlock_irqrestore(io_lock, flags);
1826 goto wait_pending;
1827 }
1828 /*
1829 * Command is still pending, need to abort it
1830 * If the firmware completes the command after this point,
1831 * the completion wont be done till mid-layer, since abort
1832 * has already started.
1833 */
1834 old_ioreq_state = CMD_STATE(sc);
1835 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1836 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1837
1838 spin_unlock_irqrestore(io_lock, flags);
1839
1840 /*
1841 * Check readiness of the remote port. If the path to remote
1842 * port is up, then send abts to the remote port to terminate
1843 * the IO. Else, just locally terminate the IO in the firmware
1844 */
1845 if (fc_remote_port_chkready(rport) == 0)
1846 task_req = FCPIO_ITMF_ABT_TASK;
1847 else {
1848 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1849 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1850 }
1851
1852 /* Now queue the abort command to firmware */
1853 int_to_scsilun(sc->device->lun, &fc_lun);
1854
1855 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1856 fc_lun.scsi_lun, io_req)) {
1857 spin_lock_irqsave(io_lock, flags);
1858 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1859 CMD_STATE(sc) = old_ioreq_state;
1860 io_req = (struct fnic_io_req *)CMD_SP(sc);
1861 if (io_req)
1862 io_req->abts_done = NULL;
1863 spin_unlock_irqrestore(io_lock, flags);
1864 ret = FAILED;
1865 goto fnic_abort_cmd_end;
1866 }
1867 if (task_req == FCPIO_ITMF_ABT_TASK) {
1868 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1869 atomic64_inc(&fnic_stats->abts_stats.aborts);
1870 } else {
1871 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1872 atomic64_inc(&fnic_stats->term_stats.terminates);
1873 }
1874
1875 /*
1876 * We queued an abort IO, wait for its completion.
1877 * Once the firmware completes the abort command, it will
1878 * wake up this thread.
1879 */
1880 wait_pending:
1881 wait_for_completion_timeout(&tm_done,
1882 msecs_to_jiffies
1883 (2 * fnic->config.ra_tov +
1884 fnic->config.ed_tov));
1885
1886 /* Check the abort status */
1887 spin_lock_irqsave(io_lock, flags);
1888
1889 io_req = (struct fnic_io_req *)CMD_SP(sc);
1890 if (!io_req) {
1891 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1892 spin_unlock_irqrestore(io_lock, flags);
1893 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1894 ret = FAILED;
1895 goto fnic_abort_cmd_end;
1896 }
1897 io_req->abts_done = NULL;
1898
1899 /* fw did not complete abort, timed out */
1900 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1901 spin_unlock_irqrestore(io_lock, flags);
1902 if (task_req == FCPIO_ITMF_ABT_TASK) {
1903 atomic64_inc(&abts_stats->abort_drv_timeouts);
1904 } else {
1905 atomic64_inc(&term_stats->terminate_drv_timeouts);
1906 }
1907 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1908 ret = FAILED;
1909 goto fnic_abort_cmd_end;
1910 }
1911
1912 /* IO out of order */
1913
1914 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1915 spin_unlock_irqrestore(io_lock, flags);
1916 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1917 "Issuing Host reset due to out of order IO\n");
1918
1919 if (fnic_host_reset(sc) == FAILED) {
1920 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1921 "fnic_host_reset failed.\n");
1922 }
1923 ret = FAILED;
1924 goto fnic_abort_cmd_end;
1925 }
1926
1927 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1928
1929 /*
1930 * firmware completed the abort, check the status,
1931 * free the io_req irrespective of failure or success
1932 */
1933 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1934 ret = FAILED;
1935
1936 CMD_SP(sc) = NULL;
1937
1938 spin_unlock_irqrestore(io_lock, flags);
1939
1940 start_time = io_req->start_time;
1941 fnic_release_ioreq_buf(fnic, io_req, sc);
1942 mempool_free(io_req, fnic->io_req_pool);
1943
1944 fnic_abort_cmd_end:
1945 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1946 sc->request->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, sc->request->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 /*
2015 * Clean up any pending aborts on the lun
2016 * For each outstanding IO on this lun, whose abort is not completed by fw,
2017 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2018 * successfully aborted, 1 otherwise
2019 */
2020 static int fnic_clean_pending_aborts(struct fnic *fnic,
2021 struct scsi_cmnd *lr_sc)
2022 {
2023 int tag, abt_tag;
2024 struct fnic_io_req *io_req;
2025 spinlock_t *io_lock;
2026 unsigned long flags;
2027 int ret = 0;
2028 struct scsi_cmnd *sc;
2029 struct scsi_lun fc_lun;
2030 struct scsi_device *lun_dev = lr_sc->device;
2031 DECLARE_COMPLETION_ONSTACK(tm_done);
2032 enum fnic_ioreq_state old_ioreq_state;
2033
2034 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2035 io_lock = fnic_io_lock_tag(fnic, tag);
2036 spin_lock_irqsave(io_lock, flags);
2037 sc = scsi_host_find_tag(fnic->lport->host, tag);
2038 /*
2039 * ignore this lun reset cmd or cmds that do not belong to
2040 * this lun
2041 */
2042 if (!sc || sc == lr_sc || sc->device != lun_dev) {
2043 spin_unlock_irqrestore(io_lock, flags);
2044 continue;
2045 }
2046
2047 io_req = (struct fnic_io_req *)CMD_SP(sc);
2048
2049 if (!io_req || sc->device != lun_dev) {
2050 spin_unlock_irqrestore(io_lock, flags);
2051 continue;
2052 }
2053
2054 /*
2055 * Found IO that is still pending with firmware and
2056 * belongs to the LUN that we are resetting
2057 */
2058 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2059 "Found IO in %s on lun\n",
2060 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2061
2062 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2063 spin_unlock_irqrestore(io_lock, flags);
2064 continue;
2065 }
2066 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2067 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2068 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2069 "%s dev rst not pending sc 0x%p\n", __func__,
2070 sc);
2071 spin_unlock_irqrestore(io_lock, flags);
2072 continue;
2073 }
2074
2075 if (io_req->abts_done)
2076 shost_printk(KERN_ERR, fnic->lport->host,
2077 "%s: io_req->abts_done is set state is %s\n",
2078 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2079 old_ioreq_state = CMD_STATE(sc);
2080 /*
2081 * Any pending IO issued prior to reset is expected to be
2082 * in abts pending state, if not we need to set
2083 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2084 * When IO is completed, the IO will be handed over and
2085 * handled in this function.
2086 */
2087 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2088
2089 BUG_ON(io_req->abts_done);
2090
2091 abt_tag = tag;
2092 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2093 abt_tag |= FNIC_TAG_DEV_RST;
2094 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2095 "%s: dev rst sc 0x%p\n", __func__, sc);
2096 }
2097
2098 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2099 io_req->abts_done = &tm_done;
2100 spin_unlock_irqrestore(io_lock, flags);
2101
2102 /* Now queue the abort command to firmware */
2103 int_to_scsilun(sc->device->lun, &fc_lun);
2104
2105 if (fnic_queue_abort_io_req(fnic, abt_tag,
2106 FCPIO_ITMF_ABT_TASK_TERM,
2107 fc_lun.scsi_lun, io_req)) {
2108 spin_lock_irqsave(io_lock, flags);
2109 io_req = (struct fnic_io_req *)CMD_SP(sc);
2110 if (io_req)
2111 io_req->abts_done = NULL;
2112 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2113 CMD_STATE(sc) = old_ioreq_state;
2114 spin_unlock_irqrestore(io_lock, flags);
2115 ret = 1;
2116 goto clean_pending_aborts_end;
2117 } else {
2118 spin_lock_irqsave(io_lock, flags);
2119 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2120 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2121 spin_unlock_irqrestore(io_lock, flags);
2122 }
2123 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2124
2125 wait_for_completion_timeout(&tm_done,
2126 msecs_to_jiffies
2127 (fnic->config.ed_tov));
2128
2129 /* Recheck cmd state to check if it is now aborted */
2130 spin_lock_irqsave(io_lock, flags);
2131 io_req = (struct fnic_io_req *)CMD_SP(sc);
2132 if (!io_req) {
2133 spin_unlock_irqrestore(io_lock, flags);
2134 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2135 continue;
2136 }
2137
2138 io_req->abts_done = NULL;
2139
2140 /* if abort is still pending with fw, fail */
2141 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2142 spin_unlock_irqrestore(io_lock, flags);
2143 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2144 ret = 1;
2145 goto clean_pending_aborts_end;
2146 }
2147 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2148 CMD_SP(sc) = NULL;
2149 spin_unlock_irqrestore(io_lock, flags);
2150
2151 fnic_release_ioreq_buf(fnic, io_req, sc);
2152 mempool_free(io_req, fnic->io_req_pool);
2153 }
2154
2155 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2156
2157 /* walk again to check, if IOs are still pending in fw */
2158 if (fnic_is_abts_pending(fnic, lr_sc))
2159 ret = FAILED;
2160
2161 clean_pending_aborts_end:
2162 return ret;
2163 }
2164
2165 /**
2166 * fnic_scsi_host_start_tag
2167 * Allocates tagid from host's tag list
2168 **/
2169 static inline int
2170 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2171 {
2172 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2173 int tag, ret = SCSI_NO_TAG;
2174
2175 BUG_ON(!bqt);
2176 if (!bqt) {
2177 pr_err("Tags are not supported\n");
2178 goto end;
2179 }
2180
2181 do {
2182 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
2183 if (tag >= bqt->max_depth) {
2184 pr_err("Tag allocation failure\n");
2185 goto end;
2186 }
2187 } while (test_and_set_bit(tag, bqt->tag_map));
2188
2189 bqt->tag_index[tag] = sc->request;
2190 sc->request->tag = tag;
2191 sc->tag = tag;
2192 if (!sc->request->special)
2193 sc->request->special = sc;
2194
2195 ret = tag;
2196
2197 end:
2198 return ret;
2199 }
2200
2201 /**
2202 * fnic_scsi_host_end_tag
2203 * frees tag allocated by fnic_scsi_host_start_tag.
2204 **/
2205 static inline void
2206 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2207 {
2208 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2209 int tag = sc->request->tag;
2210
2211 if (tag == SCSI_NO_TAG)
2212 return;
2213
2214 BUG_ON(!bqt || !bqt->tag_index[tag]);
2215 if (!bqt)
2216 return;
2217
2218 bqt->tag_index[tag] = NULL;
2219 clear_bit(tag, bqt->tag_map);
2220
2221 return;
2222 }
2223
2224 /*
2225 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2226 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2227 * on the LUN.
2228 */
2229 int fnic_device_reset(struct scsi_cmnd *sc)
2230 {
2231 struct fc_lport *lp;
2232 struct fnic *fnic;
2233 struct fnic_io_req *io_req = NULL;
2234 struct fc_rport *rport;
2235 int status;
2236 int ret = FAILED;
2237 spinlock_t *io_lock;
2238 unsigned long flags;
2239 unsigned long start_time = 0;
2240 struct scsi_lun fc_lun;
2241 struct fnic_stats *fnic_stats;
2242 struct reset_stats *reset_stats;
2243 int tag = 0;
2244 DECLARE_COMPLETION_ONSTACK(tm_done);
2245 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2246
2247 /* Wait for rport to unblock */
2248 fc_block_scsi_eh(sc);
2249
2250 /* Get local-port, check ready and link up */
2251 lp = shost_priv(sc->device->host);
2252
2253 fnic = lport_priv(lp);
2254 fnic_stats = &fnic->fnic_stats;
2255 reset_stats = &fnic->fnic_stats.reset_stats;
2256
2257 atomic64_inc(&reset_stats->device_resets);
2258
2259 rport = starget_to_rport(scsi_target(sc->device));
2260 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2261 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2262 rport->port_id, sc->device->lun, sc);
2263
2264 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2265 goto fnic_device_reset_end;
2266
2267 /* Check if remote port up */
2268 if (fc_remote_port_chkready(rport)) {
2269 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2270 goto fnic_device_reset_end;
2271 }
2272
2273 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2274 /* Allocate tag if not present */
2275
2276 tag = sc->request->tag;
2277 if (unlikely(tag < 0)) {
2278 /*
2279 * XXX(hch): current the midlayer fakes up a struct
2280 * request for the explicit reset ioctls, and those
2281 * don't have a tag allocated to them. The below
2282 * code pokes into midlayer structures to paper over
2283 * this design issue, but that won't work for blk-mq.
2284 *
2285 * Either someone who can actually test the hardware
2286 * will have to come up with a similar hack for the
2287 * blk-mq case, or we'll have to bite the bullet and
2288 * fix the way the EH ioctls work for real, but until
2289 * that happens we fail these explicit requests here.
2290 */
2291 if (shost_use_blk_mq(sc->device->host))
2292 goto fnic_device_reset_end;
2293
2294 tag = fnic_scsi_host_start_tag(fnic, sc);
2295 if (unlikely(tag == SCSI_NO_TAG))
2296 goto fnic_device_reset_end;
2297 tag_gen_flag = 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)) {
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,
2462 sc->request->tag, sc,
2463 jiffies_to_msecs(jiffies - start_time),
2464 0, ((u64)sc->cmnd[0] << 32 |
2465 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2466 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2467 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2468
2469 /* free tag if it is allocated */
2470 if (unlikely(tag_gen_flag))
2471 fnic_scsi_host_end_tag(fnic, sc);
2472
2473 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2474 "Returning from device reset %s\n",
2475 (ret == SUCCESS) ?
2476 "SUCCESS" : "FAILED");
2477
2478 if (ret == FAILED)
2479 atomic64_inc(&reset_stats->device_reset_failures);
2480
2481 return ret;
2482 }
2483
2484 /* Clean up all IOs, clean up libFC local port */
2485 int fnic_reset(struct Scsi_Host *shost)
2486 {
2487 struct fc_lport *lp;
2488 struct fnic *fnic;
2489 int ret = 0;
2490 struct reset_stats *reset_stats;
2491
2492 lp = shost_priv(shost);
2493 fnic = lport_priv(lp);
2494 reset_stats = &fnic->fnic_stats.reset_stats;
2495
2496 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2497 "fnic_reset called\n");
2498
2499 atomic64_inc(&reset_stats->fnic_resets);
2500
2501 /*
2502 * Reset local port, this will clean up libFC exchanges,
2503 * reset remote port sessions, and if link is up, begin flogi
2504 */
2505 ret = lp->tt.lport_reset(lp);
2506
2507 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2508 "Returning from fnic reset %s\n",
2509 (ret == 0) ?
2510 "SUCCESS" : "FAILED");
2511
2512 if (ret == 0)
2513 atomic64_inc(&reset_stats->fnic_reset_completions);
2514 else
2515 atomic64_inc(&reset_stats->fnic_reset_failures);
2516
2517 return ret;
2518 }
2519
2520 /*
2521 * SCSI Error handling calls driver's eh_host_reset if all prior
2522 * error handling levels return FAILED. If host reset completes
2523 * successfully, and if link is up, then Fabric login begins.
2524 *
2525 * Host Reset is the highest level of error recovery. If this fails, then
2526 * host is offlined by SCSI.
2527 *
2528 */
2529 int fnic_host_reset(struct scsi_cmnd *sc)
2530 {
2531 int ret;
2532 unsigned long wait_host_tmo;
2533 struct Scsi_Host *shost = sc->device->host;
2534 struct fc_lport *lp = shost_priv(shost);
2535
2536 /*
2537 * If fnic_reset is successful, wait for fabric login to complete
2538 * scsi-ml tries to send a TUR to every device if host reset is
2539 * successful, so before returning to scsi, fabric should be up
2540 */
2541 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2542 if (ret == SUCCESS) {
2543 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2544 ret = FAILED;
2545 while (time_before(jiffies, wait_host_tmo)) {
2546 if ((lp->state == LPORT_ST_READY) &&
2547 (lp->link_up)) {
2548 ret = SUCCESS;
2549 break;
2550 }
2551 ssleep(1);
2552 }
2553 }
2554
2555 return ret;
2556 }
2557
2558 /*
2559 * This fxn is called from libFC when host is removed
2560 */
2561 void fnic_scsi_abort_io(struct fc_lport *lp)
2562 {
2563 int err = 0;
2564 unsigned long flags;
2565 enum fnic_state old_state;
2566 struct fnic *fnic = lport_priv(lp);
2567 DECLARE_COMPLETION_ONSTACK(remove_wait);
2568
2569 /* Issue firmware reset for fnic, wait for reset to complete */
2570 retry_fw_reset:
2571 spin_lock_irqsave(&fnic->fnic_lock, flags);
2572 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2573 /* fw reset is in progress, poll for its completion */
2574 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2575 schedule_timeout(msecs_to_jiffies(100));
2576 goto retry_fw_reset;
2577 }
2578
2579 fnic->remove_wait = &remove_wait;
2580 old_state = fnic->state;
2581 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2582 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2583 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2584
2585 err = fnic_fw_reset_handler(fnic);
2586 if (err) {
2587 spin_lock_irqsave(&fnic->fnic_lock, flags);
2588 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2589 fnic->state = old_state;
2590 fnic->remove_wait = NULL;
2591 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2592 return;
2593 }
2594
2595 /* Wait for firmware reset to complete */
2596 wait_for_completion_timeout(&remove_wait,
2597 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2598
2599 spin_lock_irqsave(&fnic->fnic_lock, flags);
2600 fnic->remove_wait = NULL;
2601 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2602 "fnic_scsi_abort_io %s\n",
2603 (fnic->state == FNIC_IN_ETH_MODE) ?
2604 "SUCCESS" : "FAILED");
2605 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2606
2607 }
2608
2609 /*
2610 * This fxn called from libFC to clean up driver IO state on link down
2611 */
2612 void fnic_scsi_cleanup(struct fc_lport *lp)
2613 {
2614 unsigned long flags;
2615 enum fnic_state old_state;
2616 struct fnic *fnic = lport_priv(lp);
2617
2618 /* issue fw reset */
2619 retry_fw_reset:
2620 spin_lock_irqsave(&fnic->fnic_lock, flags);
2621 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2622 /* fw reset is in progress, poll for its completion */
2623 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2624 schedule_timeout(msecs_to_jiffies(100));
2625 goto retry_fw_reset;
2626 }
2627 old_state = fnic->state;
2628 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2629 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2630 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2631
2632 if (fnic_fw_reset_handler(fnic)) {
2633 spin_lock_irqsave(&fnic->fnic_lock, flags);
2634 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2635 fnic->state = old_state;
2636 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2637 }
2638
2639 }
2640
2641 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2642 {
2643 }
2644
2645 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2646 {
2647 struct fnic *fnic = lport_priv(lp);
2648
2649 /* Non-zero sid, nothing to do */
2650 if (sid)
2651 goto call_fc_exch_mgr_reset;
2652
2653 if (did) {
2654 fnic_rport_exch_reset(fnic, did);
2655 goto call_fc_exch_mgr_reset;
2656 }
2657
2658 /*
2659 * sid = 0, did = 0
2660 * link down or device being removed
2661 */
2662 if (!fnic->in_remove)
2663 fnic_scsi_cleanup(lp);
2664 else
2665 fnic_scsi_abort_io(lp);
2666
2667 /* call libFC exch mgr reset to reset its exchanges */
2668 call_fc_exch_mgr_reset:
2669 fc_exch_mgr_reset(lp, sid, did);
2670
2671 }
2672
2673 /*
2674 * fnic_is_abts_pending() is a helper function that
2675 * walks through tag map to check if there is any IOs pending,if there is one,
2676 * then it returns 1 (true), otherwise 0 (false)
2677 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2678 * otherwise, it checks for all IOs.
2679 */
2680 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2681 {
2682 int tag;
2683 struct fnic_io_req *io_req;
2684 spinlock_t *io_lock;
2685 unsigned long flags;
2686 int ret = 0;
2687 struct scsi_cmnd *sc;
2688 struct scsi_device *lun_dev = NULL;
2689
2690 if (lr_sc)
2691 lun_dev = lr_sc->device;
2692
2693 /* walk again to check, if IOs are still pending in fw */
2694 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2695 sc = scsi_host_find_tag(fnic->lport->host, tag);
2696 /*
2697 * ignore this lun reset cmd or cmds that do not belong to
2698 * this lun
2699 */
2700 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2701 continue;
2702
2703 io_lock = fnic_io_lock_hash(fnic, sc);
2704 spin_lock_irqsave(io_lock, flags);
2705
2706 io_req = (struct fnic_io_req *)CMD_SP(sc);
2707
2708 if (!io_req || sc->device != lun_dev) {
2709 spin_unlock_irqrestore(io_lock, flags);
2710 continue;
2711 }
2712
2713 /*
2714 * Found IO that is still pending with firmware and
2715 * belongs to the LUN that we are resetting
2716 */
2717 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2718 "Found IO in %s on lun\n",
2719 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2720
2721 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2722 ret = 1;
2723 spin_unlock_irqrestore(io_lock, flags);
2724 }
2725
2726 return ret;
2727 }
Linux with added FPC-III support