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
fnic_state_to_str(unsigned int state)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
fnic_ioreq_state_to_str(unsigned int state)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
fnic_fcpio_status_to_str(unsigned int status)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
fnic_io_lock_hash(struct fnic * fnic,struct scsi_cmnd * sc)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
fnic_io_lock_tag(struct fnic * fnic,int tag)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 */
fnic_release_ioreq_buf(struct fnic * fnic,struct fnic_io_req * io_req,struct scsi_cmnd * sc)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 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
131 DMA_TO_DEVICE);
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 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
139 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
140 }
141
142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
free_wq_copy_descs(struct fnic * fnic,struct vnic_wq_copy * wq)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
__fnic_set_state_flags(struct fnic * fnic,unsigned long st_flags,unsigned long clearbits)180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
181 unsigned long clearbits)
182 {
183 unsigned long flags = 0;
184 unsigned long host_lock_flags = 0;
185
186 spin_lock_irqsave(&fnic->fnic_lock, flags);
187 spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);
188
189 if (clearbits)
190 fnic->state_flags &= ~st_flags;
191 else
192 fnic->state_flags |= st_flags;
193
194 spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags);
195 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
196
197 return;
198 }
199
200
201 /*
202 * fnic_fw_reset_handler
203 * Routine to send reset msg to fw
204 */
fnic_fw_reset_handler(struct fnic * fnic)205 int fnic_fw_reset_handler(struct fnic *fnic)
206 {
207 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
208 int ret = 0;
209 unsigned long flags;
210
211 /* indicate fwreset to io path */
212 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
213
214 skb_queue_purge(&fnic->frame_queue);
215 skb_queue_purge(&fnic->tx_queue);
216
217 /* wait for io cmpl */
218 while (atomic_read(&fnic->in_flight))
219 schedule_timeout(msecs_to_jiffies(1));
220
221 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
222
223 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
224 free_wq_copy_descs(fnic, wq);
225
226 if (!vnic_wq_copy_desc_avail(wq))
227 ret = -EAGAIN;
228 else {
229 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
230 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
231 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
232 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
233 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
234 atomic64_read(
235 &fnic->fnic_stats.fw_stats.active_fw_reqs));
236 }
237
238 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
239
240 if (!ret) {
241 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
242 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
243 "Issued fw reset\n");
244 } else {
245 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
246 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
247 "Failed to issue fw reset\n");
248 }
249
250 return ret;
251 }
252
253
254 /*
255 * fnic_flogi_reg_handler
256 * Routine to send flogi register msg to fw
257 */
fnic_flogi_reg_handler(struct fnic * fnic,u32 fc_id)258 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
259 {
260 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
261 enum fcpio_flogi_reg_format_type format;
262 struct fc_lport *lp = fnic->lport;
263 u8 gw_mac[ETH_ALEN];
264 int ret = 0;
265 unsigned long flags;
266
267 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
268
269 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
270 free_wq_copy_descs(fnic, wq);
271
272 if (!vnic_wq_copy_desc_avail(wq)) {
273 ret = -EAGAIN;
274 goto flogi_reg_ioreq_end;
275 }
276
277 if (fnic->ctlr.map_dest) {
278 memset(gw_mac, 0xff, ETH_ALEN);
279 format = FCPIO_FLOGI_REG_DEF_DEST;
280 } else {
281 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
282 format = FCPIO_FLOGI_REG_GW_DEST;
283 }
284
285 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
286 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
287 fc_id, gw_mac,
288 fnic->data_src_addr,
289 lp->r_a_tov, lp->e_d_tov);
290 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
291 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
292 fc_id, fnic->data_src_addr, gw_mac);
293 } else {
294 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
295 format, fc_id, gw_mac);
296 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
297 "FLOGI reg issued fcid %x map %d dest %pM\n",
298 fc_id, fnic->ctlr.map_dest, gw_mac);
299 }
300
301 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
302 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
303 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
304 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
305 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
306
307 flogi_reg_ioreq_end:
308 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
309 return ret;
310 }
311
312 /*
313 * fnic_queue_wq_copy_desc
314 * Routine to enqueue a wq copy desc
315 */
fnic_queue_wq_copy_desc(struct fnic * fnic,struct vnic_wq_copy * wq,struct fnic_io_req * io_req,struct scsi_cmnd * sc,int sg_count)316 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
317 struct vnic_wq_copy *wq,
318 struct fnic_io_req *io_req,
319 struct scsi_cmnd *sc,
320 int sg_count)
321 {
322 struct scatterlist *sg;
323 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
324 struct fc_rport_libfc_priv *rp = rport->dd_data;
325 struct host_sg_desc *desc;
326 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
327 unsigned int i;
328 unsigned long intr_flags;
329 int flags;
330 u8 exch_flags;
331 struct scsi_lun fc_lun;
332
333 if (sg_count) {
334 /* For each SGE, create a device desc entry */
335 desc = io_req->sgl_list;
336 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
337 desc->addr = cpu_to_le64(sg_dma_address(sg));
338 desc->len = cpu_to_le32(sg_dma_len(sg));
339 desc->_resvd = 0;
340 desc++;
341 }
342
343 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
344 io_req->sgl_list,
345 sizeof(io_req->sgl_list[0]) * sg_count,
346 DMA_TO_DEVICE);
347 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {
348 printk(KERN_ERR "DMA mapping failed\n");
349 return SCSI_MLQUEUE_HOST_BUSY;
350 }
351 }
352
353 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
354 sc->sense_buffer,
355 SCSI_SENSE_BUFFERSIZE,
356 DMA_FROM_DEVICE);
357 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {
358 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
359 sizeof(io_req->sgl_list[0]) * sg_count,
360 DMA_TO_DEVICE);
361 printk(KERN_ERR "DMA mapping failed\n");
362 return SCSI_MLQUEUE_HOST_BUSY;
363 }
364
365 int_to_scsilun(sc->device->lun, &fc_lun);
366
367 /* Enqueue the descriptor in the Copy WQ */
368 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
369
370 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
371 free_wq_copy_descs(fnic, wq);
372
373 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
374 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
375 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
376 "fnic_queue_wq_copy_desc failure - no descriptors\n");
377 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
378 return SCSI_MLQUEUE_HOST_BUSY;
379 }
380
381 flags = 0;
382 if (sc->sc_data_direction == DMA_FROM_DEVICE)
383 flags = FCPIO_ICMND_RDDATA;
384 else if (sc->sc_data_direction == DMA_TO_DEVICE)
385 flags = FCPIO_ICMND_WRDATA;
386
387 exch_flags = 0;
388 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
389 (rp->flags & FC_RP_FLAGS_RETRY))
390 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
391
392 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
393 0, exch_flags, io_req->sgl_cnt,
394 SCSI_SENSE_BUFFERSIZE,
395 io_req->sgl_list_pa,
396 io_req->sense_buf_pa,
397 0, /* scsi cmd ref, always 0 */
398 FCPIO_ICMND_PTA_SIMPLE,
399 /* scsi pri and tag */
400 flags, /* command flags */
401 sc->cmnd, sc->cmd_len,
402 scsi_bufflen(sc),
403 fc_lun.scsi_lun, io_req->port_id,
404 rport->maxframe_size, rp->r_a_tov,
405 rp->e_d_tov);
406
407 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
408 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
409 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
410 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
411 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
412
413 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
414 return 0;
415 }
416
417 /*
418 * fnic_queuecommand
419 * Routine to send a scsi cdb
420 * Called with host_lock held and interrupts disabled.
421 */
fnic_queuecommand_lck(struct scsi_cmnd * sc,void (* done)(struct scsi_cmnd *))422 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
423 {
424 struct fc_lport *lp = shost_priv(sc->device->host);
425 struct fc_rport *rport;
426 struct fnic_io_req *io_req = NULL;
427 struct fnic *fnic = lport_priv(lp);
428 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
429 struct vnic_wq_copy *wq;
430 int ret;
431 u64 cmd_trace;
432 int sg_count = 0;
433 unsigned long flags = 0;
434 unsigned long ptr;
435 spinlock_t *io_lock = NULL;
436 int io_lock_acquired = 0;
437 struct fc_rport_libfc_priv *rp;
438
439 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
440 return SCSI_MLQUEUE_HOST_BUSY;
441
442 rport = starget_to_rport(scsi_target(sc->device));
443 if (!rport) {
444 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
445 "returning DID_NO_CONNECT for IO as rport is NULL\n");
446 sc->result = DID_NO_CONNECT << 16;
447 done(sc);
448 return 0;
449 }
450
451 ret = fc_remote_port_chkready(rport);
452 if (ret) {
453 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
454 "rport is not ready\n");
455 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
456 sc->result = ret;
457 done(sc);
458 return 0;
459 }
460
461 rp = rport->dd_data;
462 if (!rp || rp->rp_state == RPORT_ST_DELETE) {
463 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
464 "rport 0x%x removed, returning DID_NO_CONNECT\n",
465 rport->port_id);
466
467 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
468 sc->result = DID_NO_CONNECT<<16;
469 done(sc);
470 return 0;
471 }
472
473 if (rp->rp_state != RPORT_ST_READY) {
474 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
475 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
476 rport->port_id, rp->rp_state);
477
478 sc->result = DID_IMM_RETRY << 16;
479 done(sc);
480 return 0;
481 }
482
483 if (lp->state != LPORT_ST_READY || !(lp->link_up))
484 return SCSI_MLQUEUE_HOST_BUSY;
485
486 atomic_inc(&fnic->in_flight);
487
488 /*
489 * Release host lock, use driver resource specific locks from here.
490 * Don't re-enable interrupts in case they were disabled prior to the
491 * caller disabling them.
492 */
493 spin_unlock(lp->host->host_lock);
494 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
495 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
496
497 /* Get a new io_req for this SCSI IO */
498 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
499 if (!io_req) {
500 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
501 ret = SCSI_MLQUEUE_HOST_BUSY;
502 goto out;
503 }
504 memset(io_req, 0, sizeof(*io_req));
505
506 /* Map the data buffer */
507 sg_count = scsi_dma_map(sc);
508 if (sg_count < 0) {
509 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
510 sc->request->tag, sc, 0, sc->cmnd[0],
511 sg_count, CMD_STATE(sc));
512 mempool_free(io_req, fnic->io_req_pool);
513 goto out;
514 }
515
516 /* Determine the type of scatter/gather list we need */
517 io_req->sgl_cnt = sg_count;
518 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
519 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
520 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
521
522 if (sg_count) {
523 io_req->sgl_list =
524 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
525 GFP_ATOMIC);
526 if (!io_req->sgl_list) {
527 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
528 ret = SCSI_MLQUEUE_HOST_BUSY;
529 scsi_dma_unmap(sc);
530 mempool_free(io_req, fnic->io_req_pool);
531 goto out;
532 }
533
534 /* Cache sgl list allocated address before alignment */
535 io_req->sgl_list_alloc = io_req->sgl_list;
536 ptr = (unsigned long) io_req->sgl_list;
537 if (ptr % FNIC_SG_DESC_ALIGN) {
538 io_req->sgl_list = (struct host_sg_desc *)
539 (((unsigned long) ptr
540 + FNIC_SG_DESC_ALIGN - 1)
541 & ~(FNIC_SG_DESC_ALIGN - 1));
542 }
543 }
544
545 /*
546 * Will acquire lock defore setting to IO initialized.
547 */
548
549 io_lock = fnic_io_lock_hash(fnic, sc);
550 spin_lock_irqsave(io_lock, flags);
551
552 /* initialize rest of io_req */
553 io_lock_acquired = 1;
554 io_req->port_id = rport->port_id;
555 io_req->start_time = jiffies;
556 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
557 CMD_SP(sc) = (char *)io_req;
558 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
559 sc->scsi_done = done;
560
561 /* create copy wq desc and enqueue it */
562 wq = &fnic->wq_copy[0];
563 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
564 if (ret) {
565 /*
566 * In case another thread cancelled the request,
567 * refetch the pointer under the lock.
568 */
569 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
570 sc->request->tag, sc, 0, 0, 0,
571 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
572 io_req = (struct fnic_io_req *)CMD_SP(sc);
573 CMD_SP(sc) = NULL;
574 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
575 spin_unlock_irqrestore(io_lock, flags);
576 if (io_req) {
577 fnic_release_ioreq_buf(fnic, io_req, sc);
578 mempool_free(io_req, fnic->io_req_pool);
579 }
580 atomic_dec(&fnic->in_flight);
581 /* acquire host lock before returning to SCSI */
582 spin_lock(lp->host->host_lock);
583 return ret;
584 } else {
585 atomic64_inc(&fnic_stats->io_stats.active_ios);
586 atomic64_inc(&fnic_stats->io_stats.num_ios);
587 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
588 atomic64_read(&fnic_stats->io_stats.max_active_ios))
589 atomic64_set(&fnic_stats->io_stats.max_active_ios,
590 atomic64_read(&fnic_stats->io_stats.active_ios));
591
592 /* REVISIT: Use per IO lock in the final code */
593 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
594 }
595 out:
596 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
597 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
598 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
599 sc->cmnd[5]);
600
601 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
602 sc->request->tag, sc, io_req,
603 sg_count, cmd_trace,
604 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
605
606 /* if only we issued IO, will we have the io lock */
607 if (io_lock_acquired)
608 spin_unlock_irqrestore(io_lock, flags);
609
610 atomic_dec(&fnic->in_flight);
611 /* acquire host lock before returning to SCSI */
612 spin_lock(lp->host->host_lock);
613 return ret;
614 }
615
DEF_SCSI_QCMD(fnic_queuecommand)616 DEF_SCSI_QCMD(fnic_queuecommand)
617
618 /*
619 * fnic_fcpio_fw_reset_cmpl_handler
620 * Routine to handle fw reset completion
621 */
622 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
623 struct fcpio_fw_req *desc)
624 {
625 u8 type;
626 u8 hdr_status;
627 struct fcpio_tag tag;
628 int ret = 0;
629 unsigned long flags;
630 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
631
632 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
633
634 atomic64_inc(&reset_stats->fw_reset_completions);
635
636 /* Clean up all outstanding io requests */
637 fnic_cleanup_io(fnic, SCSI_NO_TAG);
638
639 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
640 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
641 atomic64_set(&fnic->io_cmpl_skip, 0);
642
643 spin_lock_irqsave(&fnic->fnic_lock, flags);
644
645 /* fnic should be in FC_TRANS_ETH_MODE */
646 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
647 /* Check status of reset completion */
648 if (!hdr_status) {
649 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
650 "reset cmpl success\n");
651 /* Ready to send flogi out */
652 fnic->state = FNIC_IN_ETH_MODE;
653 } else {
654 FNIC_SCSI_DBG(KERN_DEBUG,
655 fnic->lport->host,
656 "fnic fw_reset : failed %s\n",
657 fnic_fcpio_status_to_str(hdr_status));
658
659 /*
660 * Unable to change to eth mode, cannot send out flogi
661 * Change state to fc mode, so that subsequent Flogi
662 * requests from libFC will cause more attempts to
663 * reset the firmware. Free the cached flogi
664 */
665 fnic->state = FNIC_IN_FC_MODE;
666 atomic64_inc(&reset_stats->fw_reset_failures);
667 ret = -1;
668 }
669 } else {
670 FNIC_SCSI_DBG(KERN_DEBUG,
671 fnic->lport->host,
672 "Unexpected state %s while processing"
673 " reset cmpl\n", fnic_state_to_str(fnic->state));
674 atomic64_inc(&reset_stats->fw_reset_failures);
675 ret = -1;
676 }
677
678 /* Thread removing device blocks till firmware reset is complete */
679 if (fnic->remove_wait)
680 complete(fnic->remove_wait);
681
682 /*
683 * If fnic is being removed, or fw reset failed
684 * free the flogi frame. Else, send it out
685 */
686 if (fnic->remove_wait || ret) {
687 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
688 skb_queue_purge(&fnic->tx_queue);
689 goto reset_cmpl_handler_end;
690 }
691
692 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
693
694 fnic_flush_tx(fnic);
695
696 reset_cmpl_handler_end:
697 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
698
699 return ret;
700 }
701
702 /*
703 * fnic_fcpio_flogi_reg_cmpl_handler
704 * Routine to handle flogi register completion
705 */
fnic_fcpio_flogi_reg_cmpl_handler(struct fnic * fnic,struct fcpio_fw_req * desc)706 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
707 struct fcpio_fw_req *desc)
708 {
709 u8 type;
710 u8 hdr_status;
711 struct fcpio_tag tag;
712 int ret = 0;
713 unsigned long flags;
714
715 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
716
717 /* Update fnic state based on status of flogi reg completion */
718 spin_lock_irqsave(&fnic->fnic_lock, flags);
719
720 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
721
722 /* Check flogi registration completion status */
723 if (!hdr_status) {
724 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
725 "flog reg succeeded\n");
726 fnic->state = FNIC_IN_FC_MODE;
727 } else {
728 FNIC_SCSI_DBG(KERN_DEBUG,
729 fnic->lport->host,
730 "fnic flogi reg :failed %s\n",
731 fnic_fcpio_status_to_str(hdr_status));
732 fnic->state = FNIC_IN_ETH_MODE;
733 ret = -1;
734 }
735 } else {
736 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
737 "Unexpected fnic state %s while"
738 " processing flogi reg completion\n",
739 fnic_state_to_str(fnic->state));
740 ret = -1;
741 }
742
743 if (!ret) {
744 if (fnic->stop_rx_link_events) {
745 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
746 goto reg_cmpl_handler_end;
747 }
748 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
749
750 fnic_flush_tx(fnic);
751 queue_work(fnic_event_queue, &fnic->frame_work);
752 } else {
753 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
754 }
755
756 reg_cmpl_handler_end:
757 return ret;
758 }
759
is_ack_index_in_range(struct vnic_wq_copy * wq,u16 request_out)760 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
761 u16 request_out)
762 {
763 if (wq->to_clean_index <= wq->to_use_index) {
764 /* out of range, stale request_out index */
765 if (request_out < wq->to_clean_index ||
766 request_out >= wq->to_use_index)
767 return 0;
768 } else {
769 /* out of range, stale request_out index */
770 if (request_out < wq->to_clean_index &&
771 request_out >= wq->to_use_index)
772 return 0;
773 }
774 /* request_out index is in range */
775 return 1;
776 }
777
778
779 /*
780 * Mark that ack received and store the Ack index. If there are multiple
781 * acks received before Tx thread cleans it up, the latest value will be
782 * used which is correct behavior. This state should be in the copy Wq
783 * instead of in the fnic
784 */
fnic_fcpio_ack_handler(struct fnic * fnic,unsigned int cq_index,struct fcpio_fw_req * desc)785 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
786 unsigned int cq_index,
787 struct fcpio_fw_req *desc)
788 {
789 struct vnic_wq_copy *wq;
790 u16 request_out = desc->u.ack.request_out;
791 unsigned long flags;
792 u64 *ox_id_tag = (u64 *)(void *)desc;
793
794 /* mark the ack state */
795 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
796 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
797
798 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
799 if (is_ack_index_in_range(wq, request_out)) {
800 fnic->fw_ack_index[0] = request_out;
801 fnic->fw_ack_recd[0] = 1;
802 } else
803 atomic64_inc(
804 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
805
806 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
807 FNIC_TRACE(fnic_fcpio_ack_handler,
808 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
809 ox_id_tag[4], ox_id_tag[5]);
810 }
811
812 /*
813 * fnic_fcpio_icmnd_cmpl_handler
814 * Routine to handle icmnd completions
815 */
fnic_fcpio_icmnd_cmpl_handler(struct fnic * fnic,struct fcpio_fw_req * desc)816 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
817 struct fcpio_fw_req *desc)
818 {
819 u8 type;
820 u8 hdr_status;
821 struct fcpio_tag tag;
822 u32 id;
823 u64 xfer_len = 0;
824 struct fcpio_icmnd_cmpl *icmnd_cmpl;
825 struct fnic_io_req *io_req;
826 struct scsi_cmnd *sc;
827 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
828 unsigned long flags;
829 spinlock_t *io_lock;
830 u64 cmd_trace;
831 unsigned long start_time;
832 unsigned long io_duration_time;
833
834 /* Decode the cmpl description to get the io_req id */
835 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
836 fcpio_tag_id_dec(&tag, &id);
837 icmnd_cmpl = &desc->u.icmnd_cmpl;
838
839 if (id >= fnic->fnic_max_tag_id) {
840 shost_printk(KERN_ERR, fnic->lport->host,
841 "Tag out of range tag %x hdr status = %s\n",
842 id, fnic_fcpio_status_to_str(hdr_status));
843 return;
844 }
845
846 sc = scsi_host_find_tag(fnic->lport->host, id);
847 WARN_ON_ONCE(!sc);
848 if (!sc) {
849 atomic64_inc(&fnic_stats->io_stats.sc_null);
850 shost_printk(KERN_ERR, fnic->lport->host,
851 "icmnd_cmpl sc is null - "
852 "hdr status = %s tag = 0x%x desc = 0x%p\n",
853 fnic_fcpio_status_to_str(hdr_status), id, desc);
854 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
855 fnic->lport->host->host_no, id,
856 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
857 (u64)icmnd_cmpl->_resvd0[0]),
858 ((u64)hdr_status << 16 |
859 (u64)icmnd_cmpl->scsi_status << 8 |
860 (u64)icmnd_cmpl->flags), desc,
861 (u64)icmnd_cmpl->residual, 0);
862 return;
863 }
864
865 io_lock = fnic_io_lock_hash(fnic, sc);
866 spin_lock_irqsave(io_lock, flags);
867 io_req = (struct fnic_io_req *)CMD_SP(sc);
868 WARN_ON_ONCE(!io_req);
869 if (!io_req) {
870 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
871 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
872 spin_unlock_irqrestore(io_lock, flags);
873 shost_printk(KERN_ERR, fnic->lport->host,
874 "icmnd_cmpl io_req is null - "
875 "hdr status = %s tag = 0x%x sc 0x%p\n",
876 fnic_fcpio_status_to_str(hdr_status), id, sc);
877 return;
878 }
879 start_time = io_req->start_time;
880
881 /* firmware completed the io */
882 io_req->io_completed = 1;
883
884 /*
885 * if SCSI-ML has already issued abort on this command,
886 * set completion of the IO. The abts path will clean it up
887 */
888 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
889
890 /*
891 * set the FNIC_IO_DONE so that this doesn't get
892 * flagged as 'out of order' if it was not aborted
893 */
894 CMD_FLAGS(sc) |= FNIC_IO_DONE;
895 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
896 spin_unlock_irqrestore(io_lock, flags);
897 if(FCPIO_ABORTED == hdr_status)
898 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
899
900 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
901 "icmnd_cmpl abts pending "
902 "hdr status = %s tag = 0x%x sc = 0x%p "
903 "scsi_status = %x residual = %d\n",
904 fnic_fcpio_status_to_str(hdr_status),
905 id, sc,
906 icmnd_cmpl->scsi_status,
907 icmnd_cmpl->residual);
908 return;
909 }
910
911 /* Mark the IO as complete */
912 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
913
914 icmnd_cmpl = &desc->u.icmnd_cmpl;
915
916 switch (hdr_status) {
917 case FCPIO_SUCCESS:
918 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
919 xfer_len = scsi_bufflen(sc);
920 scsi_set_resid(sc, icmnd_cmpl->residual);
921
922 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
923 xfer_len -= icmnd_cmpl->residual;
924
925 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
926 atomic64_inc(&fnic_stats->misc_stats.check_condition);
927
928 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
929 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
930 break;
931
932 case FCPIO_TIMEOUT: /* request was timed out */
933 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
934 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
935 break;
936
937 case FCPIO_ABORTED: /* request was aborted */
938 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
939 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
940 break;
941
942 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
943 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
944 scsi_set_resid(sc, icmnd_cmpl->residual);
945 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
946 break;
947
948 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
949 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
950 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
951 break;
952
953 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
954 atomic64_inc(&fnic_stats->io_stats.io_not_found);
955 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
956 break;
957
958 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
959 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
960 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
961 break;
962
963 case FCPIO_FW_ERR: /* request was terminated due fw error */
964 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
965 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
966 break;
967
968 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
969 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
970 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
971 break;
972
973 case FCPIO_INVALID_HEADER: /* header contains invalid data */
974 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
975 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
976 default:
977 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
978 break;
979 }
980
981 /* Break link with the SCSI command */
982 CMD_SP(sc) = NULL;
983 CMD_FLAGS(sc) |= FNIC_IO_DONE;
984
985 spin_unlock_irqrestore(io_lock, flags);
986
987 if (hdr_status != FCPIO_SUCCESS) {
988 atomic64_inc(&fnic_stats->io_stats.io_failures);
989 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
990 fnic_fcpio_status_to_str(hdr_status));
991 }
992
993 fnic_release_ioreq_buf(fnic, io_req, sc);
994
995 mempool_free(io_req, fnic->io_req_pool);
996
997 cmd_trace = ((u64)hdr_status << 56) |
998 (u64)icmnd_cmpl->scsi_status << 48 |
999 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
1000 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1001 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
1002
1003 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
1004 sc->device->host->host_no, id, sc,
1005 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
1006 (u64)icmnd_cmpl->_resvd0[0] << 48 |
1007 jiffies_to_msecs(jiffies - start_time)),
1008 desc, cmd_trace,
1009 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1010
1011 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1012 fnic->lport->host_stats.fcp_input_requests++;
1013 fnic->fcp_input_bytes += xfer_len;
1014 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1015 fnic->lport->host_stats.fcp_output_requests++;
1016 fnic->fcp_output_bytes += xfer_len;
1017 } else
1018 fnic->lport->host_stats.fcp_control_requests++;
1019
1020 atomic64_dec(&fnic_stats->io_stats.active_ios);
1021 if (atomic64_read(&fnic->io_cmpl_skip))
1022 atomic64_dec(&fnic->io_cmpl_skip);
1023 else
1024 atomic64_inc(&fnic_stats->io_stats.io_completions);
1025
1026
1027 io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1028
1029 if(io_duration_time <= 10)
1030 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
1031 else if(io_duration_time <= 100)
1032 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
1033 else if(io_duration_time <= 500)
1034 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
1035 else if(io_duration_time <= 5000)
1036 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
1037 else if(io_duration_time <= 10000)
1038 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
1039 else if(io_duration_time <= 30000)
1040 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
1041 else {
1042 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
1043
1044 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
1045 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
1046 }
1047
1048 /* Call SCSI completion function to complete the IO */
1049 if (sc->scsi_done)
1050 sc->scsi_done(sc);
1051 }
1052
1053 /* fnic_fcpio_itmf_cmpl_handler
1054 * Routine to handle itmf completions
1055 */
fnic_fcpio_itmf_cmpl_handler(struct fnic * fnic,struct fcpio_fw_req * desc)1056 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1057 struct fcpio_fw_req *desc)
1058 {
1059 u8 type;
1060 u8 hdr_status;
1061 struct fcpio_tag tag;
1062 u32 id;
1063 struct scsi_cmnd *sc;
1064 struct fnic_io_req *io_req;
1065 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1066 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1067 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1068 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1069 unsigned long flags;
1070 spinlock_t *io_lock;
1071 unsigned long start_time;
1072
1073 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1074 fcpio_tag_id_dec(&tag, &id);
1075
1076 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1077 shost_printk(KERN_ERR, fnic->lport->host,
1078 "Tag out of range tag %x hdr status = %s\n",
1079 id, fnic_fcpio_status_to_str(hdr_status));
1080 return;
1081 }
1082
1083 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1084 WARN_ON_ONCE(!sc);
1085 if (!sc) {
1086 atomic64_inc(&fnic_stats->io_stats.sc_null);
1087 shost_printk(KERN_ERR, fnic->lport->host,
1088 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1089 fnic_fcpio_status_to_str(hdr_status), id);
1090 return;
1091 }
1092 io_lock = fnic_io_lock_hash(fnic, sc);
1093 spin_lock_irqsave(io_lock, flags);
1094 io_req = (struct fnic_io_req *)CMD_SP(sc);
1095 WARN_ON_ONCE(!io_req);
1096 if (!io_req) {
1097 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1098 spin_unlock_irqrestore(io_lock, flags);
1099 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1100 shost_printk(KERN_ERR, fnic->lport->host,
1101 "itmf_cmpl io_req is null - "
1102 "hdr status = %s tag = 0x%x sc 0x%p\n",
1103 fnic_fcpio_status_to_str(hdr_status), id, sc);
1104 return;
1105 }
1106 start_time = io_req->start_time;
1107
1108 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1109 /* Abort and terminate completion of device reset req */
1110 /* REVISIT : Add asserts about various flags */
1111 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1112 "dev reset abts cmpl recd. id %x status %s\n",
1113 id, fnic_fcpio_status_to_str(hdr_status));
1114 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1115 CMD_ABTS_STATUS(sc) = hdr_status;
1116 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1117 if (io_req->abts_done)
1118 complete(io_req->abts_done);
1119 spin_unlock_irqrestore(io_lock, flags);
1120 } else if (id & FNIC_TAG_ABORT) {
1121 /* Completion of abort cmd */
1122 switch (hdr_status) {
1123 case FCPIO_SUCCESS:
1124 break;
1125 case FCPIO_TIMEOUT:
1126 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1127 atomic64_inc(&abts_stats->abort_fw_timeouts);
1128 else
1129 atomic64_inc(
1130 &term_stats->terminate_fw_timeouts);
1131 break;
1132 case FCPIO_ITMF_REJECTED:
1133 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1134 "abort reject recd. id %d\n",
1135 (int)(id & FNIC_TAG_MASK));
1136 break;
1137 case FCPIO_IO_NOT_FOUND:
1138 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1139 atomic64_inc(&abts_stats->abort_io_not_found);
1140 else
1141 atomic64_inc(
1142 &term_stats->terminate_io_not_found);
1143 break;
1144 default:
1145 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1146 atomic64_inc(&abts_stats->abort_failures);
1147 else
1148 atomic64_inc(
1149 &term_stats->terminate_failures);
1150 break;
1151 }
1152 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1153 /* This is a late completion. Ignore it */
1154 spin_unlock_irqrestore(io_lock, flags);
1155 return;
1156 }
1157
1158 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1159 CMD_ABTS_STATUS(sc) = hdr_status;
1160
1161 /* If the status is IO not found consider it as success */
1162 if (hdr_status == FCPIO_IO_NOT_FOUND)
1163 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
1164
1165 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1166 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1167
1168 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1169 "abts cmpl recd. id %d status %s\n",
1170 (int)(id & FNIC_TAG_MASK),
1171 fnic_fcpio_status_to_str(hdr_status));
1172
1173 /*
1174 * If scsi_eh thread is blocked waiting for abts to complete,
1175 * signal completion to it. IO will be cleaned in the thread
1176 * else clean it in this context
1177 */
1178 if (io_req->abts_done) {
1179 complete(io_req->abts_done);
1180 spin_unlock_irqrestore(io_lock, flags);
1181 } else {
1182 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1183 "abts cmpl, completing IO\n");
1184 CMD_SP(sc) = NULL;
1185 sc->result = (DID_ERROR << 16);
1186
1187 spin_unlock_irqrestore(io_lock, flags);
1188
1189 fnic_release_ioreq_buf(fnic, io_req, sc);
1190 mempool_free(io_req, fnic->io_req_pool);
1191 if (sc->scsi_done) {
1192 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1193 sc->device->host->host_no, id,
1194 sc,
1195 jiffies_to_msecs(jiffies - start_time),
1196 desc,
1197 (((u64)hdr_status << 40) |
1198 (u64)sc->cmnd[0] << 32 |
1199 (u64)sc->cmnd[2] << 24 |
1200 (u64)sc->cmnd[3] << 16 |
1201 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1202 (((u64)CMD_FLAGS(sc) << 32) |
1203 CMD_STATE(sc)));
1204 sc->scsi_done(sc);
1205 atomic64_dec(&fnic_stats->io_stats.active_ios);
1206 if (atomic64_read(&fnic->io_cmpl_skip))
1207 atomic64_dec(&fnic->io_cmpl_skip);
1208 else
1209 atomic64_inc(&fnic_stats->io_stats.io_completions);
1210 }
1211 }
1212
1213 } else if (id & FNIC_TAG_DEV_RST) {
1214 /* Completion of device reset */
1215 CMD_LR_STATUS(sc) = hdr_status;
1216 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1217 spin_unlock_irqrestore(io_lock, flags);
1218 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1219 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1220 sc->device->host->host_no, id, sc,
1221 jiffies_to_msecs(jiffies - start_time),
1222 desc, 0,
1223 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1224 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1225 "Terminate pending "
1226 "dev reset cmpl recd. id %d status %s\n",
1227 (int)(id & FNIC_TAG_MASK),
1228 fnic_fcpio_status_to_str(hdr_status));
1229 return;
1230 }
1231 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1232 /* Need to wait for terminate completion */
1233 spin_unlock_irqrestore(io_lock, flags);
1234 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1235 sc->device->host->host_no, id, sc,
1236 jiffies_to_msecs(jiffies - start_time),
1237 desc, 0,
1238 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1239 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1240 "dev reset cmpl recd after time out. "
1241 "id %d status %s\n",
1242 (int)(id & FNIC_TAG_MASK),
1243 fnic_fcpio_status_to_str(hdr_status));
1244 return;
1245 }
1246 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1247 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1248 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1249 "dev reset cmpl recd. id %d status %s\n",
1250 (int)(id & FNIC_TAG_MASK),
1251 fnic_fcpio_status_to_str(hdr_status));
1252 if (io_req->dr_done)
1253 complete(io_req->dr_done);
1254 spin_unlock_irqrestore(io_lock, flags);
1255
1256 } else {
1257 shost_printk(KERN_ERR, fnic->lport->host,
1258 "Unexpected itmf io state %s tag %x\n",
1259 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1260 spin_unlock_irqrestore(io_lock, flags);
1261 }
1262
1263 }
1264
1265 /*
1266 * fnic_fcpio_cmpl_handler
1267 * Routine to service the cq for wq_copy
1268 */
fnic_fcpio_cmpl_handler(struct vnic_dev * vdev,unsigned int cq_index,struct fcpio_fw_req * desc)1269 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1270 unsigned int cq_index,
1271 struct fcpio_fw_req *desc)
1272 {
1273 struct fnic *fnic = vnic_dev_priv(vdev);
1274
1275 switch (desc->hdr.type) {
1276 case FCPIO_ICMND_CMPL: /* fw completed a command */
1277 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1278 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1279 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1280 case FCPIO_RESET_CMPL: /* fw completed reset */
1281 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1282 break;
1283 default:
1284 break;
1285 }
1286
1287 switch (desc->hdr.type) {
1288 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1289 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1290 break;
1291
1292 case FCPIO_ICMND_CMPL: /* fw completed a command */
1293 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1294 break;
1295
1296 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1297 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1298 break;
1299
1300 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1301 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1302 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1303 break;
1304
1305 case FCPIO_RESET_CMPL: /* fw completed reset */
1306 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1307 break;
1308
1309 default:
1310 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1311 "firmware completion type %d\n",
1312 desc->hdr.type);
1313 break;
1314 }
1315
1316 return 0;
1317 }
1318
1319 /*
1320 * fnic_wq_copy_cmpl_handler
1321 * Routine to process wq copy
1322 */
fnic_wq_copy_cmpl_handler(struct fnic * fnic,int copy_work_to_do)1323 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1324 {
1325 unsigned int wq_work_done = 0;
1326 unsigned int i, cq_index;
1327 unsigned int cur_work_done;
1328 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1329 u64 start_jiffies = 0;
1330 u64 end_jiffies = 0;
1331 u64 delta_jiffies = 0;
1332 u64 delta_ms = 0;
1333
1334 for (i = 0; i < fnic->wq_copy_count; i++) {
1335 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1336
1337 start_jiffies = jiffies;
1338 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1339 fnic_fcpio_cmpl_handler,
1340 copy_work_to_do);
1341 end_jiffies = jiffies;
1342
1343 wq_work_done += cur_work_done;
1344 delta_jiffies = end_jiffies - start_jiffies;
1345 if (delta_jiffies >
1346 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) {
1347 atomic64_set(&misc_stats->max_isr_jiffies,
1348 delta_jiffies);
1349 delta_ms = jiffies_to_msecs(delta_jiffies);
1350 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);
1351 atomic64_set(&misc_stats->corr_work_done,
1352 cur_work_done);
1353 }
1354 }
1355 return wq_work_done;
1356 }
1357
fnic_cleanup_io(struct fnic * fnic,int exclude_id)1358 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1359 {
1360 int i;
1361 struct fnic_io_req *io_req;
1362 unsigned long flags = 0;
1363 struct scsi_cmnd *sc;
1364 spinlock_t *io_lock;
1365 unsigned long start_time = 0;
1366 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1367
1368 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1369 if (i == exclude_id)
1370 continue;
1371
1372 io_lock = fnic_io_lock_tag(fnic, i);
1373 spin_lock_irqsave(io_lock, flags);
1374 sc = scsi_host_find_tag(fnic->lport->host, i);
1375 if (!sc) {
1376 spin_unlock_irqrestore(io_lock, flags);
1377 continue;
1378 }
1379
1380 io_req = (struct fnic_io_req *)CMD_SP(sc);
1381 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1382 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1383 /*
1384 * We will be here only when FW completes reset
1385 * without sending completions for outstanding ios.
1386 */
1387 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1388 if (io_req && io_req->dr_done)
1389 complete(io_req->dr_done);
1390 else if (io_req && io_req->abts_done)
1391 complete(io_req->abts_done);
1392 spin_unlock_irqrestore(io_lock, flags);
1393 continue;
1394 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1395 spin_unlock_irqrestore(io_lock, flags);
1396 continue;
1397 }
1398 if (!io_req) {
1399 spin_unlock_irqrestore(io_lock, flags);
1400 goto cleanup_scsi_cmd;
1401 }
1402
1403 CMD_SP(sc) = NULL;
1404
1405 spin_unlock_irqrestore(io_lock, flags);
1406
1407 /*
1408 * If there is a scsi_cmnd associated with this io_req, then
1409 * free the corresponding state
1410 */
1411 start_time = io_req->start_time;
1412 fnic_release_ioreq_buf(fnic, io_req, sc);
1413 mempool_free(io_req, fnic->io_req_pool);
1414
1415 cleanup_scsi_cmd:
1416 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1417 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1418 "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
1419 __func__, sc->request->tag, sc,
1420 (jiffies - start_time));
1421
1422 if (atomic64_read(&fnic->io_cmpl_skip))
1423 atomic64_dec(&fnic->io_cmpl_skip);
1424 else
1425 atomic64_inc(&fnic_stats->io_stats.io_completions);
1426
1427 /* Complete the command to SCSI */
1428 if (sc->scsi_done) {
1429 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED))
1430 shost_printk(KERN_ERR, fnic->lport->host,
1431 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
1432 sc->request->tag, sc);
1433
1434 FNIC_TRACE(fnic_cleanup_io,
1435 sc->device->host->host_no, i, sc,
1436 jiffies_to_msecs(jiffies - start_time),
1437 0, ((u64)sc->cmnd[0] << 32 |
1438 (u64)sc->cmnd[2] << 24 |
1439 (u64)sc->cmnd[3] << 16 |
1440 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1441 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1442
1443 sc->scsi_done(sc);
1444 }
1445 }
1446 }
1447
fnic_wq_copy_cleanup_handler(struct vnic_wq_copy * wq,struct fcpio_host_req * desc)1448 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1449 struct fcpio_host_req *desc)
1450 {
1451 u32 id;
1452 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1453 struct fnic_io_req *io_req;
1454 struct scsi_cmnd *sc;
1455 unsigned long flags;
1456 spinlock_t *io_lock;
1457 unsigned long start_time = 0;
1458
1459 /* get the tag reference */
1460 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1461 id &= FNIC_TAG_MASK;
1462
1463 if (id >= fnic->fnic_max_tag_id)
1464 return;
1465
1466 sc = scsi_host_find_tag(fnic->lport->host, id);
1467 if (!sc)
1468 return;
1469
1470 io_lock = fnic_io_lock_hash(fnic, sc);
1471 spin_lock_irqsave(io_lock, flags);
1472
1473 /* Get the IO context which this desc refers to */
1474 io_req = (struct fnic_io_req *)CMD_SP(sc);
1475
1476 /* fnic interrupts are turned off by now */
1477
1478 if (!io_req) {
1479 spin_unlock_irqrestore(io_lock, flags);
1480 goto wq_copy_cleanup_scsi_cmd;
1481 }
1482
1483 CMD_SP(sc) = NULL;
1484
1485 spin_unlock_irqrestore(io_lock, flags);
1486
1487 start_time = io_req->start_time;
1488 fnic_release_ioreq_buf(fnic, io_req, sc);
1489 mempool_free(io_req, fnic->io_req_pool);
1490
1491 wq_copy_cleanup_scsi_cmd:
1492 sc->result = DID_NO_CONNECT << 16;
1493 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1494 " DID_NO_CONNECT\n");
1495
1496 if (sc->scsi_done) {
1497 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1498 sc->device->host->host_no, id, sc,
1499 jiffies_to_msecs(jiffies - start_time),
1500 0, ((u64)sc->cmnd[0] << 32 |
1501 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1502 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1503 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1504
1505 sc->scsi_done(sc);
1506 }
1507 }
1508
fnic_queue_abort_io_req(struct fnic * fnic,int tag,u32 task_req,u8 * fc_lun,struct fnic_io_req * io_req)1509 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1510 u32 task_req, u8 *fc_lun,
1511 struct fnic_io_req *io_req)
1512 {
1513 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1514 struct Scsi_Host *host = fnic->lport->host;
1515 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1516 unsigned long flags;
1517
1518 spin_lock_irqsave(host->host_lock, flags);
1519 if (unlikely(fnic_chk_state_flags_locked(fnic,
1520 FNIC_FLAGS_IO_BLOCKED))) {
1521 spin_unlock_irqrestore(host->host_lock, flags);
1522 return 1;
1523 } else
1524 atomic_inc(&fnic->in_flight);
1525 spin_unlock_irqrestore(host->host_lock, flags);
1526
1527 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1528
1529 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1530 free_wq_copy_descs(fnic, wq);
1531
1532 if (!vnic_wq_copy_desc_avail(wq)) {
1533 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1534 atomic_dec(&fnic->in_flight);
1535 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1536 "fnic_queue_abort_io_req: failure: no descriptors\n");
1537 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1538 return 1;
1539 }
1540 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1541 0, task_req, tag, fc_lun, io_req->port_id,
1542 fnic->config.ra_tov, fnic->config.ed_tov);
1543
1544 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1545 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1546 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1547 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1548 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1549
1550 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1551 atomic_dec(&fnic->in_flight);
1552
1553 return 0;
1554 }
1555
fnic_rport_exch_reset(struct fnic * fnic,u32 port_id)1556 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1557 {
1558 int tag;
1559 int abt_tag;
1560 int term_cnt = 0;
1561 struct fnic_io_req *io_req;
1562 spinlock_t *io_lock;
1563 unsigned long flags;
1564 struct scsi_cmnd *sc;
1565 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1566 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1567 struct scsi_lun fc_lun;
1568 enum fnic_ioreq_state old_ioreq_state;
1569
1570 FNIC_SCSI_DBG(KERN_DEBUG,
1571 fnic->lport->host,
1572 "fnic_rport_exch_reset called portid 0x%06x\n",
1573 port_id);
1574
1575 if (fnic->in_remove)
1576 return;
1577
1578 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1579 abt_tag = tag;
1580 io_lock = fnic_io_lock_tag(fnic, tag);
1581 spin_lock_irqsave(io_lock, flags);
1582 sc = scsi_host_find_tag(fnic->lport->host, tag);
1583 if (!sc) {
1584 spin_unlock_irqrestore(io_lock, flags);
1585 continue;
1586 }
1587
1588 io_req = (struct fnic_io_req *)CMD_SP(sc);
1589
1590 if (!io_req || io_req->port_id != port_id) {
1591 spin_unlock_irqrestore(io_lock, flags);
1592 continue;
1593 }
1594
1595 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1596 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1597 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1598 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1599 sc);
1600 spin_unlock_irqrestore(io_lock, flags);
1601 continue;
1602 }
1603
1604 /*
1605 * Found IO that is still pending with firmware and
1606 * belongs to rport that went away
1607 */
1608 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1609 spin_unlock_irqrestore(io_lock, flags);
1610 continue;
1611 }
1612 if (io_req->abts_done) {
1613 shost_printk(KERN_ERR, fnic->lport->host,
1614 "fnic_rport_exch_reset: io_req->abts_done is set "
1615 "state is %s\n",
1616 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1617 }
1618
1619 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1620 shost_printk(KERN_ERR, fnic->lport->host,
1621 "rport_exch_reset "
1622 "IO not yet issued %p tag 0x%x flags "
1623 "%x state %d\n",
1624 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1625 }
1626 old_ioreq_state = CMD_STATE(sc);
1627 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1628 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1629 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1630 atomic64_inc(&reset_stats->device_reset_terminates);
1631 abt_tag = (tag | FNIC_TAG_DEV_RST);
1632 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1633 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1634 sc);
1635 }
1636
1637 BUG_ON(io_req->abts_done);
1638
1639 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1640 "fnic_rport_reset_exch: Issuing abts\n");
1641
1642 spin_unlock_irqrestore(io_lock, flags);
1643
1644 /* Now queue the abort command to firmware */
1645 int_to_scsilun(sc->device->lun, &fc_lun);
1646
1647 if (fnic_queue_abort_io_req(fnic, abt_tag,
1648 FCPIO_ITMF_ABT_TASK_TERM,
1649 fc_lun.scsi_lun, io_req)) {
1650 /*
1651 * Revert the cmd state back to old state, if
1652 * it hasn't changed in between. This cmd will get
1653 * aborted later by scsi_eh, or cleaned up during
1654 * lun reset
1655 */
1656 spin_lock_irqsave(io_lock, flags);
1657 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1658 CMD_STATE(sc) = old_ioreq_state;
1659 spin_unlock_irqrestore(io_lock, flags);
1660 } else {
1661 spin_lock_irqsave(io_lock, flags);
1662 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1663 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1664 else
1665 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1666 spin_unlock_irqrestore(io_lock, flags);
1667 atomic64_inc(&term_stats->terminates);
1668 term_cnt++;
1669 }
1670 }
1671 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1672 atomic64_set(&term_stats->max_terminates, term_cnt);
1673
1674 }
1675
fnic_terminate_rport_io(struct fc_rport * rport)1676 void fnic_terminate_rport_io(struct fc_rport *rport)
1677 {
1678 int tag;
1679 int abt_tag;
1680 int term_cnt = 0;
1681 struct fnic_io_req *io_req;
1682 spinlock_t *io_lock;
1683 unsigned long flags;
1684 struct scsi_cmnd *sc;
1685 struct scsi_lun fc_lun;
1686 struct fc_rport_libfc_priv *rdata;
1687 struct fc_lport *lport;
1688 struct fnic *fnic;
1689 struct fc_rport *cmd_rport;
1690 struct reset_stats *reset_stats;
1691 struct terminate_stats *term_stats;
1692 enum fnic_ioreq_state old_ioreq_state;
1693
1694 if (!rport) {
1695 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1696 return;
1697 }
1698 rdata = rport->dd_data;
1699
1700 if (!rdata) {
1701 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1702 return;
1703 }
1704 lport = rdata->local_port;
1705
1706 if (!lport) {
1707 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1708 return;
1709 }
1710 fnic = lport_priv(lport);
1711 FNIC_SCSI_DBG(KERN_DEBUG,
1712 fnic->lport->host, "fnic_terminate_rport_io called"
1713 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1714 rport->port_name, rport->node_name, rport,
1715 rport->port_id);
1716
1717 if (fnic->in_remove)
1718 return;
1719
1720 reset_stats = &fnic->fnic_stats.reset_stats;
1721 term_stats = &fnic->fnic_stats.term_stats;
1722
1723 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1724 abt_tag = tag;
1725 io_lock = fnic_io_lock_tag(fnic, tag);
1726 spin_lock_irqsave(io_lock, flags);
1727 sc = scsi_host_find_tag(fnic->lport->host, tag);
1728 if (!sc) {
1729 spin_unlock_irqrestore(io_lock, flags);
1730 continue;
1731 }
1732
1733 cmd_rport = starget_to_rport(scsi_target(sc->device));
1734 if (rport != cmd_rport) {
1735 spin_unlock_irqrestore(io_lock, flags);
1736 continue;
1737 }
1738
1739 io_req = (struct fnic_io_req *)CMD_SP(sc);
1740
1741 if (!io_req || rport != cmd_rport) {
1742 spin_unlock_irqrestore(io_lock, flags);
1743 continue;
1744 }
1745
1746 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1747 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1748 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1749 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1750 sc);
1751 spin_unlock_irqrestore(io_lock, flags);
1752 continue;
1753 }
1754 /*
1755 * Found IO that is still pending with firmware and
1756 * belongs to rport that went away
1757 */
1758 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1759 spin_unlock_irqrestore(io_lock, flags);
1760 continue;
1761 }
1762 if (io_req->abts_done) {
1763 shost_printk(KERN_ERR, fnic->lport->host,
1764 "fnic_terminate_rport_io: io_req->abts_done is set "
1765 "state is %s\n",
1766 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1767 }
1768 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1769 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1770 "fnic_terminate_rport_io "
1771 "IO not yet issued %p tag 0x%x flags "
1772 "%x state %d\n",
1773 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1774 }
1775 old_ioreq_state = CMD_STATE(sc);
1776 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1777 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1778 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1779 atomic64_inc(&reset_stats->device_reset_terminates);
1780 abt_tag = (tag | FNIC_TAG_DEV_RST);
1781 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1782 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1783 }
1784
1785 BUG_ON(io_req->abts_done);
1786
1787 FNIC_SCSI_DBG(KERN_DEBUG,
1788 fnic->lport->host,
1789 "fnic_terminate_rport_io: Issuing abts\n");
1790
1791 spin_unlock_irqrestore(io_lock, flags);
1792
1793 /* Now queue the abort command to firmware */
1794 int_to_scsilun(sc->device->lun, &fc_lun);
1795
1796 if (fnic_queue_abort_io_req(fnic, abt_tag,
1797 FCPIO_ITMF_ABT_TASK_TERM,
1798 fc_lun.scsi_lun, io_req)) {
1799 /*
1800 * Revert the cmd state back to old state, if
1801 * it hasn't changed in between. This cmd will get
1802 * aborted later by scsi_eh, or cleaned up during
1803 * lun reset
1804 */
1805 spin_lock_irqsave(io_lock, flags);
1806 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1807 CMD_STATE(sc) = old_ioreq_state;
1808 spin_unlock_irqrestore(io_lock, flags);
1809 } else {
1810 spin_lock_irqsave(io_lock, flags);
1811 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1812 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1813 else
1814 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1815 spin_unlock_irqrestore(io_lock, flags);
1816 atomic64_inc(&term_stats->terminates);
1817 term_cnt++;
1818 }
1819 }
1820 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1821 atomic64_set(&term_stats->max_terminates, term_cnt);
1822
1823 }
1824
1825 /*
1826 * This function is exported to SCSI for sending abort cmnds.
1827 * A SCSI IO is represented by a io_req in the driver.
1828 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1829 */
fnic_abort_cmd(struct scsi_cmnd * sc)1830 int fnic_abort_cmd(struct scsi_cmnd *sc)
1831 {
1832 struct fc_lport *lp;
1833 struct fnic *fnic;
1834 struct fnic_io_req *io_req = NULL;
1835 struct fc_rport *rport;
1836 spinlock_t *io_lock;
1837 unsigned long flags;
1838 unsigned long start_time = 0;
1839 int ret = SUCCESS;
1840 u32 task_req = 0;
1841 struct scsi_lun fc_lun;
1842 struct fnic_stats *fnic_stats;
1843 struct abort_stats *abts_stats;
1844 struct terminate_stats *term_stats;
1845 enum fnic_ioreq_state old_ioreq_state;
1846 int tag;
1847 unsigned long abt_issued_time;
1848 DECLARE_COMPLETION_ONSTACK(tm_done);
1849
1850 /* Wait for rport to unblock */
1851 fc_block_scsi_eh(sc);
1852
1853 /* Get local-port, check ready and link up */
1854 lp = shost_priv(sc->device->host);
1855
1856 fnic = lport_priv(lp);
1857 fnic_stats = &fnic->fnic_stats;
1858 abts_stats = &fnic->fnic_stats.abts_stats;
1859 term_stats = &fnic->fnic_stats.term_stats;
1860
1861 rport = starget_to_rport(scsi_target(sc->device));
1862 tag = sc->request->tag;
1863 FNIC_SCSI_DBG(KERN_DEBUG,
1864 fnic->lport->host,
1865 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1866 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1867
1868 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1869
1870 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1871 ret = FAILED;
1872 goto fnic_abort_cmd_end;
1873 }
1874
1875 /*
1876 * Avoid a race between SCSI issuing the abort and the device
1877 * completing the command.
1878 *
1879 * If the command is already completed by the fw cmpl code,
1880 * we just return SUCCESS from here. This means that the abort
1881 * succeeded. In the SCSI ML, since the timeout for command has
1882 * happened, the completion wont actually complete the command
1883 * and it will be considered as an aborted command
1884 *
1885 * The CMD_SP will not be cleared except while holding io_req_lock.
1886 */
1887 io_lock = fnic_io_lock_hash(fnic, sc);
1888 spin_lock_irqsave(io_lock, flags);
1889 io_req = (struct fnic_io_req *)CMD_SP(sc);
1890 if (!io_req) {
1891 spin_unlock_irqrestore(io_lock, flags);
1892 goto fnic_abort_cmd_end;
1893 }
1894
1895 io_req->abts_done = &tm_done;
1896
1897 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1898 spin_unlock_irqrestore(io_lock, flags);
1899 goto wait_pending;
1900 }
1901
1902 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1903 if (abt_issued_time <= 6000)
1904 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
1905 else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
1906 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
1907 else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
1908 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
1909 else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
1910 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
1911 else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
1912 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
1913 else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
1914 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
1915 else
1916 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
1917
1918 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1919 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
1920 /*
1921 * Command is still pending, need to abort it
1922 * If the firmware completes the command after this point,
1923 * the completion wont be done till mid-layer, since abort
1924 * has already started.
1925 */
1926 old_ioreq_state = CMD_STATE(sc);
1927 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1928 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1929
1930 spin_unlock_irqrestore(io_lock, flags);
1931
1932 /*
1933 * Check readiness of the remote port. If the path to remote
1934 * port is up, then send abts to the remote port to terminate
1935 * the IO. Else, just locally terminate the IO in the firmware
1936 */
1937 if (fc_remote_port_chkready(rport) == 0)
1938 task_req = FCPIO_ITMF_ABT_TASK;
1939 else {
1940 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1941 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1942 }
1943
1944 /* Now queue the abort command to firmware */
1945 int_to_scsilun(sc->device->lun, &fc_lun);
1946
1947 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1948 fc_lun.scsi_lun, io_req)) {
1949 spin_lock_irqsave(io_lock, flags);
1950 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1951 CMD_STATE(sc) = old_ioreq_state;
1952 io_req = (struct fnic_io_req *)CMD_SP(sc);
1953 if (io_req)
1954 io_req->abts_done = NULL;
1955 spin_unlock_irqrestore(io_lock, flags);
1956 ret = FAILED;
1957 goto fnic_abort_cmd_end;
1958 }
1959 if (task_req == FCPIO_ITMF_ABT_TASK) {
1960 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1961 atomic64_inc(&fnic_stats->abts_stats.aborts);
1962 } else {
1963 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1964 atomic64_inc(&fnic_stats->term_stats.terminates);
1965 }
1966
1967 /*
1968 * We queued an abort IO, wait for its completion.
1969 * Once the firmware completes the abort command, it will
1970 * wake up this thread.
1971 */
1972 wait_pending:
1973 wait_for_completion_timeout(&tm_done,
1974 msecs_to_jiffies
1975 (2 * fnic->config.ra_tov +
1976 fnic->config.ed_tov));
1977
1978 /* Check the abort status */
1979 spin_lock_irqsave(io_lock, flags);
1980
1981 io_req = (struct fnic_io_req *)CMD_SP(sc);
1982 if (!io_req) {
1983 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1984 spin_unlock_irqrestore(io_lock, flags);
1985 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1986 ret = FAILED;
1987 goto fnic_abort_cmd_end;
1988 }
1989 io_req->abts_done = NULL;
1990
1991 /* fw did not complete abort, timed out */
1992 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1993 spin_unlock_irqrestore(io_lock, flags);
1994 if (task_req == FCPIO_ITMF_ABT_TASK) {
1995 atomic64_inc(&abts_stats->abort_drv_timeouts);
1996 } else {
1997 atomic64_inc(&term_stats->terminate_drv_timeouts);
1998 }
1999 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
2000 ret = FAILED;
2001 goto fnic_abort_cmd_end;
2002 }
2003
2004 /* IO out of order */
2005
2006 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
2007 spin_unlock_irqrestore(io_lock, flags);
2008 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2009 "Issuing Host reset due to out of order IO\n");
2010
2011 ret = FAILED;
2012 goto fnic_abort_cmd_end;
2013 }
2014
2015 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2016
2017 start_time = io_req->start_time;
2018 /*
2019 * firmware completed the abort, check the status,
2020 * free the io_req if successful. If abort fails,
2021 * Device reset will clean the I/O.
2022 */
2023 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS)
2024 CMD_SP(sc) = NULL;
2025 else {
2026 ret = FAILED;
2027 spin_unlock_irqrestore(io_lock, flags);
2028 goto fnic_abort_cmd_end;
2029 }
2030
2031 spin_unlock_irqrestore(io_lock, flags);
2032
2033 fnic_release_ioreq_buf(fnic, io_req, sc);
2034 mempool_free(io_req, fnic->io_req_pool);
2035
2036 if (sc->scsi_done) {
2037 /* Call SCSI completion function to complete the IO */
2038 sc->result = (DID_ABORT << 16);
2039 sc->scsi_done(sc);
2040 atomic64_dec(&fnic_stats->io_stats.active_ios);
2041 if (atomic64_read(&fnic->io_cmpl_skip))
2042 atomic64_dec(&fnic->io_cmpl_skip);
2043 else
2044 atomic64_inc(&fnic_stats->io_stats.io_completions);
2045 }
2046
2047 fnic_abort_cmd_end:
2048 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
2049 sc->request->tag, sc,
2050 jiffies_to_msecs(jiffies - start_time),
2051 0, ((u64)sc->cmnd[0] << 32 |
2052 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2053 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2054 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2055
2056 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2057 "Returning from abort cmd type %x %s\n", task_req,
2058 (ret == SUCCESS) ?
2059 "SUCCESS" : "FAILED");
2060 return ret;
2061 }
2062
fnic_queue_dr_io_req(struct fnic * fnic,struct scsi_cmnd * sc,struct fnic_io_req * io_req)2063 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
2064 struct scsi_cmnd *sc,
2065 struct fnic_io_req *io_req)
2066 {
2067 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
2068 struct Scsi_Host *host = fnic->lport->host;
2069 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
2070 struct scsi_lun fc_lun;
2071 int ret = 0;
2072 unsigned long intr_flags;
2073
2074 spin_lock_irqsave(host->host_lock, intr_flags);
2075 if (unlikely(fnic_chk_state_flags_locked(fnic,
2076 FNIC_FLAGS_IO_BLOCKED))) {
2077 spin_unlock_irqrestore(host->host_lock, intr_flags);
2078 return FAILED;
2079 } else
2080 atomic_inc(&fnic->in_flight);
2081 spin_unlock_irqrestore(host->host_lock, intr_flags);
2082
2083 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
2084
2085 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
2086 free_wq_copy_descs(fnic, wq);
2087
2088 if (!vnic_wq_copy_desc_avail(wq)) {
2089 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2090 "queue_dr_io_req failure - no descriptors\n");
2091 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
2092 ret = -EAGAIN;
2093 goto lr_io_req_end;
2094 }
2095
2096 /* fill in the lun info */
2097 int_to_scsilun(sc->device->lun, &fc_lun);
2098
2099 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
2100 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
2101 fc_lun.scsi_lun, io_req->port_id,
2102 fnic->config.ra_tov, fnic->config.ed_tov);
2103
2104 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
2105 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
2106 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
2107 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
2108 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
2109
2110 lr_io_req_end:
2111 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
2112 atomic_dec(&fnic->in_flight);
2113
2114 return ret;
2115 }
2116
2117 /*
2118 * Clean up any pending aborts on the lun
2119 * For each outstanding IO on this lun, whose abort is not completed by fw,
2120 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2121 * successfully aborted, 1 otherwise
2122 */
fnic_clean_pending_aborts(struct fnic * fnic,struct scsi_cmnd * lr_sc,bool new_sc)2123 static int fnic_clean_pending_aborts(struct fnic *fnic,
2124 struct scsi_cmnd *lr_sc,
2125 bool new_sc)
2126
2127 {
2128 int tag, abt_tag;
2129 struct fnic_io_req *io_req;
2130 spinlock_t *io_lock;
2131 unsigned long flags;
2132 int ret = 0;
2133 struct scsi_cmnd *sc;
2134 struct scsi_lun fc_lun;
2135 struct scsi_device *lun_dev = lr_sc->device;
2136 DECLARE_COMPLETION_ONSTACK(tm_done);
2137 enum fnic_ioreq_state old_ioreq_state;
2138
2139 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2140 io_lock = fnic_io_lock_tag(fnic, tag);
2141 spin_lock_irqsave(io_lock, flags);
2142 sc = scsi_host_find_tag(fnic->lport->host, tag);
2143 /*
2144 * ignore this lun reset cmd if issued using new SC
2145 * or cmds that do not belong to this lun
2146 */
2147 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) {
2148 spin_unlock_irqrestore(io_lock, flags);
2149 continue;
2150 }
2151
2152 io_req = (struct fnic_io_req *)CMD_SP(sc);
2153
2154 if (!io_req || sc->device != lun_dev) {
2155 spin_unlock_irqrestore(io_lock, flags);
2156 continue;
2157 }
2158
2159 /*
2160 * Found IO that is still pending with firmware and
2161 * belongs to the LUN that we are resetting
2162 */
2163 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2164 "Found IO in %s on lun\n",
2165 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2166
2167 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2168 spin_unlock_irqrestore(io_lock, flags);
2169 continue;
2170 }
2171 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2172 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2173 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2174 "%s dev rst not pending sc 0x%p\n", __func__,
2175 sc);
2176 spin_unlock_irqrestore(io_lock, flags);
2177 continue;
2178 }
2179
2180 if (io_req->abts_done)
2181 shost_printk(KERN_ERR, fnic->lport->host,
2182 "%s: io_req->abts_done is set state is %s\n",
2183 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2184 old_ioreq_state = CMD_STATE(sc);
2185 /*
2186 * Any pending IO issued prior to reset is expected to be
2187 * in abts pending state, if not we need to set
2188 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2189 * When IO is completed, the IO will be handed over and
2190 * handled in this function.
2191 */
2192 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2193
2194 BUG_ON(io_req->abts_done);
2195
2196 abt_tag = tag;
2197 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2198 abt_tag |= FNIC_TAG_DEV_RST;
2199 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2200 "%s: dev rst sc 0x%p\n", __func__, sc);
2201 }
2202
2203 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2204 io_req->abts_done = &tm_done;
2205 spin_unlock_irqrestore(io_lock, flags);
2206
2207 /* Now queue the abort command to firmware */
2208 int_to_scsilun(sc->device->lun, &fc_lun);
2209
2210 if (fnic_queue_abort_io_req(fnic, abt_tag,
2211 FCPIO_ITMF_ABT_TASK_TERM,
2212 fc_lun.scsi_lun, io_req)) {
2213 spin_lock_irqsave(io_lock, flags);
2214 io_req = (struct fnic_io_req *)CMD_SP(sc);
2215 if (io_req)
2216 io_req->abts_done = NULL;
2217 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2218 CMD_STATE(sc) = old_ioreq_state;
2219 spin_unlock_irqrestore(io_lock, flags);
2220 ret = 1;
2221 goto clean_pending_aborts_end;
2222 } else {
2223 spin_lock_irqsave(io_lock, flags);
2224 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2225 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2226 spin_unlock_irqrestore(io_lock, flags);
2227 }
2228 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2229
2230 wait_for_completion_timeout(&tm_done,
2231 msecs_to_jiffies
2232 (fnic->config.ed_tov));
2233
2234 /* Recheck cmd state to check if it is now aborted */
2235 spin_lock_irqsave(io_lock, flags);
2236 io_req = (struct fnic_io_req *)CMD_SP(sc);
2237 if (!io_req) {
2238 spin_unlock_irqrestore(io_lock, flags);
2239 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2240 continue;
2241 }
2242
2243 io_req->abts_done = NULL;
2244
2245 /* if abort is still pending with fw, fail */
2246 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2247 spin_unlock_irqrestore(io_lock, flags);
2248 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2249 ret = 1;
2250 goto clean_pending_aborts_end;
2251 }
2252 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2253
2254 /* original sc used for lr is handled by dev reset code */
2255 if (sc != lr_sc)
2256 CMD_SP(sc) = NULL;
2257 spin_unlock_irqrestore(io_lock, flags);
2258
2259 /* original sc used for lr is handled by dev reset code */
2260 if (sc != lr_sc) {
2261 fnic_release_ioreq_buf(fnic, io_req, sc);
2262 mempool_free(io_req, fnic->io_req_pool);
2263 }
2264
2265 /*
2266 * Any IO is returned during reset, it needs to call scsi_done
2267 * to return the scsi_cmnd to upper layer.
2268 */
2269 if (sc->scsi_done) {
2270 /* Set result to let upper SCSI layer retry */
2271 sc->result = DID_RESET << 16;
2272 sc->scsi_done(sc);
2273 }
2274 }
2275
2276 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2277
2278 /* walk again to check, if IOs are still pending in fw */
2279 if (fnic_is_abts_pending(fnic, lr_sc))
2280 ret = FAILED;
2281
2282 clean_pending_aborts_end:
2283 return ret;
2284 }
2285
2286 /**
2287 * fnic_scsi_host_start_tag
2288 * Allocates tagid from host's tag list
2289 **/
2290 static inline int
fnic_scsi_host_start_tag(struct fnic * fnic,struct scsi_cmnd * sc)2291 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2292 {
2293 struct request_queue *q = sc->request->q;
2294 struct request *dummy;
2295
2296 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT);
2297 if (IS_ERR(dummy))
2298 return SCSI_NO_TAG;
2299
2300 sc->tag = sc->request->tag = dummy->tag;
2301 sc->host_scribble = (unsigned char *)dummy;
2302
2303 return dummy->tag;
2304 }
2305
2306 /**
2307 * fnic_scsi_host_end_tag
2308 * frees tag allocated by fnic_scsi_host_start_tag.
2309 **/
2310 static inline void
fnic_scsi_host_end_tag(struct fnic * fnic,struct scsi_cmnd * sc)2311 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2312 {
2313 struct request *dummy = (struct request *)sc->host_scribble;
2314
2315 blk_mq_free_request(dummy);
2316 }
2317
2318 /*
2319 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2320 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2321 * on the LUN.
2322 */
fnic_device_reset(struct scsi_cmnd * sc)2323 int fnic_device_reset(struct scsi_cmnd *sc)
2324 {
2325 struct fc_lport *lp;
2326 struct fnic *fnic;
2327 struct fnic_io_req *io_req = NULL;
2328 struct fc_rport *rport;
2329 int status;
2330 int ret = FAILED;
2331 spinlock_t *io_lock;
2332 unsigned long flags;
2333 unsigned long start_time = 0;
2334 struct scsi_lun fc_lun;
2335 struct fnic_stats *fnic_stats;
2336 struct reset_stats *reset_stats;
2337 int tag = 0;
2338 DECLARE_COMPLETION_ONSTACK(tm_done);
2339 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2340 bool new_sc = 0;
2341
2342 /* Wait for rport to unblock */
2343 fc_block_scsi_eh(sc);
2344
2345 /* Get local-port, check ready and link up */
2346 lp = shost_priv(sc->device->host);
2347
2348 fnic = lport_priv(lp);
2349 fnic_stats = &fnic->fnic_stats;
2350 reset_stats = &fnic->fnic_stats.reset_stats;
2351
2352 atomic64_inc(&reset_stats->device_resets);
2353
2354 rport = starget_to_rport(scsi_target(sc->device));
2355 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2356 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2357 rport->port_id, sc->device->lun, sc);
2358
2359 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2360 goto fnic_device_reset_end;
2361
2362 /* Check if remote port up */
2363 if (fc_remote_port_chkready(rport)) {
2364 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2365 goto fnic_device_reset_end;
2366 }
2367
2368 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2369 /* Allocate tag if not present */
2370
2371 tag = sc->request->tag;
2372 if (unlikely(tag < 0)) {
2373 /*
2374 * Really should fix the midlayer to pass in a proper
2375 * request for ioctls...
2376 */
2377 tag = fnic_scsi_host_start_tag(fnic, sc);
2378 if (unlikely(tag == SCSI_NO_TAG))
2379 goto fnic_device_reset_end;
2380 tag_gen_flag = 1;
2381 new_sc = 1;
2382 }
2383 io_lock = fnic_io_lock_hash(fnic, sc);
2384 spin_lock_irqsave(io_lock, flags);
2385 io_req = (struct fnic_io_req *)CMD_SP(sc);
2386
2387 /*
2388 * If there is a io_req attached to this command, then use it,
2389 * else allocate a new one.
2390 */
2391 if (!io_req) {
2392 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2393 if (!io_req) {
2394 spin_unlock_irqrestore(io_lock, flags);
2395 goto fnic_device_reset_end;
2396 }
2397 memset(io_req, 0, sizeof(*io_req));
2398 io_req->port_id = rport->port_id;
2399 CMD_SP(sc) = (char *)io_req;
2400 }
2401 io_req->dr_done = &tm_done;
2402 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2403 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2404 spin_unlock_irqrestore(io_lock, flags);
2405
2406 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2407
2408 /*
2409 * issue the device reset, if enqueue failed, clean up the ioreq
2410 * and break assoc with scsi cmd
2411 */
2412 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2413 spin_lock_irqsave(io_lock, flags);
2414 io_req = (struct fnic_io_req *)CMD_SP(sc);
2415 if (io_req)
2416 io_req->dr_done = NULL;
2417 goto fnic_device_reset_clean;
2418 }
2419 spin_lock_irqsave(io_lock, flags);
2420 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2421 spin_unlock_irqrestore(io_lock, flags);
2422
2423 /*
2424 * Wait on the local completion for LUN reset. The io_req may be
2425 * freed while we wait since we hold no lock.
2426 */
2427 wait_for_completion_timeout(&tm_done,
2428 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2429
2430 spin_lock_irqsave(io_lock, flags);
2431 io_req = (struct fnic_io_req *)CMD_SP(sc);
2432 if (!io_req) {
2433 spin_unlock_irqrestore(io_lock, flags);
2434 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2435 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2436 goto fnic_device_reset_end;
2437 }
2438 io_req->dr_done = NULL;
2439
2440 status = CMD_LR_STATUS(sc);
2441
2442 /*
2443 * If lun reset not completed, bail out with failed. io_req
2444 * gets cleaned up during higher levels of EH
2445 */
2446 if (status == FCPIO_INVALID_CODE) {
2447 atomic64_inc(&reset_stats->device_reset_timeouts);
2448 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2449 "Device reset timed out\n");
2450 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2451 spin_unlock_irqrestore(io_lock, flags);
2452 int_to_scsilun(sc->device->lun, &fc_lun);
2453 /*
2454 * Issue abort and terminate on device reset request.
2455 * If q'ing of terminate fails, retry it after a delay.
2456 */
2457 while (1) {
2458 spin_lock_irqsave(io_lock, flags);
2459 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2460 spin_unlock_irqrestore(io_lock, flags);
2461 break;
2462 }
2463 spin_unlock_irqrestore(io_lock, flags);
2464 if (fnic_queue_abort_io_req(fnic,
2465 tag | FNIC_TAG_DEV_RST,
2466 FCPIO_ITMF_ABT_TASK_TERM,
2467 fc_lun.scsi_lun, io_req)) {
2468 wait_for_completion_timeout(&tm_done,
2469 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2470 } else {
2471 spin_lock_irqsave(io_lock, flags);
2472 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2473 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2474 io_req->abts_done = &tm_done;
2475 spin_unlock_irqrestore(io_lock, flags);
2476 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2477 "Abort and terminate issued on Device reset "
2478 "tag 0x%x sc 0x%p\n", tag, sc);
2479 break;
2480 }
2481 }
2482 while (1) {
2483 spin_lock_irqsave(io_lock, flags);
2484 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2485 spin_unlock_irqrestore(io_lock, flags);
2486 wait_for_completion_timeout(&tm_done,
2487 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2488 break;
2489 } else {
2490 io_req = (struct fnic_io_req *)CMD_SP(sc);
2491 io_req->abts_done = NULL;
2492 goto fnic_device_reset_clean;
2493 }
2494 }
2495 } else {
2496 spin_unlock_irqrestore(io_lock, flags);
2497 }
2498
2499 /* Completed, but not successful, clean up the io_req, return fail */
2500 if (status != FCPIO_SUCCESS) {
2501 spin_lock_irqsave(io_lock, flags);
2502 FNIC_SCSI_DBG(KERN_DEBUG,
2503 fnic->lport->host,
2504 "Device reset completed - failed\n");
2505 io_req = (struct fnic_io_req *)CMD_SP(sc);
2506 goto fnic_device_reset_clean;
2507 }
2508
2509 /*
2510 * Clean up any aborts on this lun that have still not
2511 * completed. If any of these fail, then LUN reset fails.
2512 * clean_pending_aborts cleans all cmds on this lun except
2513 * the lun reset cmd. If all cmds get cleaned, the lun reset
2514 * succeeds
2515 */
2516 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
2517 spin_lock_irqsave(io_lock, flags);
2518 io_req = (struct fnic_io_req *)CMD_SP(sc);
2519 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2520 "Device reset failed"
2521 " since could not abort all IOs\n");
2522 goto fnic_device_reset_clean;
2523 }
2524
2525 /* Clean lun reset command */
2526 spin_lock_irqsave(io_lock, flags);
2527 io_req = (struct fnic_io_req *)CMD_SP(sc);
2528 if (io_req)
2529 /* Completed, and successful */
2530 ret = SUCCESS;
2531
2532 fnic_device_reset_clean:
2533 if (io_req)
2534 CMD_SP(sc) = NULL;
2535
2536 spin_unlock_irqrestore(io_lock, flags);
2537
2538 if (io_req) {
2539 start_time = io_req->start_time;
2540 fnic_release_ioreq_buf(fnic, io_req, sc);
2541 mempool_free(io_req, fnic->io_req_pool);
2542 }
2543
2544 fnic_device_reset_end:
2545 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2546 sc->request->tag, sc,
2547 jiffies_to_msecs(jiffies - start_time),
2548 0, ((u64)sc->cmnd[0] << 32 |
2549 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2550 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2551 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2552
2553 /* free tag if it is allocated */
2554 if (unlikely(tag_gen_flag))
2555 fnic_scsi_host_end_tag(fnic, sc);
2556
2557 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2558 "Returning from device reset %s\n",
2559 (ret == SUCCESS) ?
2560 "SUCCESS" : "FAILED");
2561
2562 if (ret == FAILED)
2563 atomic64_inc(&reset_stats->device_reset_failures);
2564
2565 return ret;
2566 }
2567
2568 /* Clean up all IOs, clean up libFC local port */
fnic_reset(struct Scsi_Host * shost)2569 int fnic_reset(struct Scsi_Host *shost)
2570 {
2571 struct fc_lport *lp;
2572 struct fnic *fnic;
2573 int ret = 0;
2574 struct reset_stats *reset_stats;
2575
2576 lp = shost_priv(shost);
2577 fnic = lport_priv(lp);
2578 reset_stats = &fnic->fnic_stats.reset_stats;
2579
2580 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2581 "fnic_reset called\n");
2582
2583 atomic64_inc(&reset_stats->fnic_resets);
2584
2585 /*
2586 * Reset local port, this will clean up libFC exchanges,
2587 * reset remote port sessions, and if link is up, begin flogi
2588 */
2589 ret = fc_lport_reset(lp);
2590
2591 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2592 "Returning from fnic reset %s\n",
2593 (ret == 0) ?
2594 "SUCCESS" : "FAILED");
2595
2596 if (ret == 0)
2597 atomic64_inc(&reset_stats->fnic_reset_completions);
2598 else
2599 atomic64_inc(&reset_stats->fnic_reset_failures);
2600
2601 return ret;
2602 }
2603
2604 /*
2605 * SCSI Error handling calls driver's eh_host_reset if all prior
2606 * error handling levels return FAILED. If host reset completes
2607 * successfully, and if link is up, then Fabric login begins.
2608 *
2609 * Host Reset is the highest level of error recovery. If this fails, then
2610 * host is offlined by SCSI.
2611 *
2612 */
fnic_host_reset(struct scsi_cmnd * sc)2613 int fnic_host_reset(struct scsi_cmnd *sc)
2614 {
2615 int ret;
2616 unsigned long wait_host_tmo;
2617 struct Scsi_Host *shost = sc->device->host;
2618 struct fc_lport *lp = shost_priv(shost);
2619 struct fnic *fnic = lport_priv(lp);
2620 unsigned long flags;
2621
2622 spin_lock_irqsave(&fnic->fnic_lock, flags);
2623 if (fnic->internal_reset_inprogress == 0) {
2624 fnic->internal_reset_inprogress = 1;
2625 } else {
2626 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2627 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2628 "host reset in progress skipping another host reset\n");
2629 return SUCCESS;
2630 }
2631 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2632
2633 /*
2634 * If fnic_reset is successful, wait for fabric login to complete
2635 * scsi-ml tries to send a TUR to every device if host reset is
2636 * successful, so before returning to scsi, fabric should be up
2637 */
2638 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2639 if (ret == SUCCESS) {
2640 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2641 ret = FAILED;
2642 while (time_before(jiffies, wait_host_tmo)) {
2643 if ((lp->state == LPORT_ST_READY) &&
2644 (lp->link_up)) {
2645 ret = SUCCESS;
2646 break;
2647 }
2648 ssleep(1);
2649 }
2650 }
2651
2652 spin_lock_irqsave(&fnic->fnic_lock, flags);
2653 fnic->internal_reset_inprogress = 0;
2654 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2655 return ret;
2656 }
2657
2658 /*
2659 * This fxn is called from libFC when host is removed
2660 */
fnic_scsi_abort_io(struct fc_lport * lp)2661 void fnic_scsi_abort_io(struct fc_lport *lp)
2662 {
2663 int err = 0;
2664 unsigned long flags;
2665 enum fnic_state old_state;
2666 struct fnic *fnic = lport_priv(lp);
2667 DECLARE_COMPLETION_ONSTACK(remove_wait);
2668
2669 /* Issue firmware reset for fnic, wait for reset to complete */
2670 retry_fw_reset:
2671 spin_lock_irqsave(&fnic->fnic_lock, flags);
2672 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2673 /* fw reset is in progress, poll for its completion */
2674 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2675 schedule_timeout(msecs_to_jiffies(100));
2676 goto retry_fw_reset;
2677 }
2678
2679 fnic->remove_wait = &remove_wait;
2680 old_state = fnic->state;
2681 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2682 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2683 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2684
2685 err = fnic_fw_reset_handler(fnic);
2686 if (err) {
2687 spin_lock_irqsave(&fnic->fnic_lock, flags);
2688 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2689 fnic->state = old_state;
2690 fnic->remove_wait = NULL;
2691 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2692 return;
2693 }
2694
2695 /* Wait for firmware reset to complete */
2696 wait_for_completion_timeout(&remove_wait,
2697 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2698
2699 spin_lock_irqsave(&fnic->fnic_lock, flags);
2700 fnic->remove_wait = NULL;
2701 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2702 "fnic_scsi_abort_io %s\n",
2703 (fnic->state == FNIC_IN_ETH_MODE) ?
2704 "SUCCESS" : "FAILED");
2705 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2706
2707 }
2708
2709 /*
2710 * This fxn called from libFC to clean up driver IO state on link down
2711 */
fnic_scsi_cleanup(struct fc_lport * lp)2712 void fnic_scsi_cleanup(struct fc_lport *lp)
2713 {
2714 unsigned long flags;
2715 enum fnic_state old_state;
2716 struct fnic *fnic = lport_priv(lp);
2717
2718 /* issue fw reset */
2719 retry_fw_reset:
2720 spin_lock_irqsave(&fnic->fnic_lock, flags);
2721 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2722 /* fw reset is in progress, poll for its completion */
2723 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2724 schedule_timeout(msecs_to_jiffies(100));
2725 goto retry_fw_reset;
2726 }
2727 old_state = fnic->state;
2728 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2729 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2730 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2731
2732 if (fnic_fw_reset_handler(fnic)) {
2733 spin_lock_irqsave(&fnic->fnic_lock, flags);
2734 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2735 fnic->state = old_state;
2736 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2737 }
2738
2739 }
2740
fnic_empty_scsi_cleanup(struct fc_lport * lp)2741 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2742 {
2743 }
2744
fnic_exch_mgr_reset(struct fc_lport * lp,u32 sid,u32 did)2745 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2746 {
2747 struct fnic *fnic = lport_priv(lp);
2748
2749 /* Non-zero sid, nothing to do */
2750 if (sid)
2751 goto call_fc_exch_mgr_reset;
2752
2753 if (did) {
2754 fnic_rport_exch_reset(fnic, did);
2755 goto call_fc_exch_mgr_reset;
2756 }
2757
2758 /*
2759 * sid = 0, did = 0
2760 * link down or device being removed
2761 */
2762 if (!fnic->in_remove)
2763 fnic_scsi_cleanup(lp);
2764 else
2765 fnic_scsi_abort_io(lp);
2766
2767 /* call libFC exch mgr reset to reset its exchanges */
2768 call_fc_exch_mgr_reset:
2769 fc_exch_mgr_reset(lp, sid, did);
2770
2771 }
2772
2773 /*
2774 * fnic_is_abts_pending() is a helper function that
2775 * walks through tag map to check if there is any IOs pending,if there is one,
2776 * then it returns 1 (true), otherwise 0 (false)
2777 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2778 * otherwise, it checks for all IOs.
2779 */
fnic_is_abts_pending(struct fnic * fnic,struct scsi_cmnd * lr_sc)2780 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2781 {
2782 int tag;
2783 struct fnic_io_req *io_req;
2784 spinlock_t *io_lock;
2785 unsigned long flags;
2786 int ret = 0;
2787 struct scsi_cmnd *sc;
2788 struct scsi_device *lun_dev = NULL;
2789
2790 if (lr_sc)
2791 lun_dev = lr_sc->device;
2792
2793 /* walk again to check, if IOs are still pending in fw */
2794 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2795 sc = scsi_host_find_tag(fnic->lport->host, tag);
2796 /*
2797 * ignore this lun reset cmd or cmds that do not belong to
2798 * this lun
2799 */
2800 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2801 continue;
2802
2803 io_lock = fnic_io_lock_hash(fnic, sc);
2804 spin_lock_irqsave(io_lock, flags);
2805
2806 io_req = (struct fnic_io_req *)CMD_SP(sc);
2807
2808 if (!io_req || sc->device != lun_dev) {
2809 spin_unlock_irqrestore(io_lock, flags);
2810 continue;
2811 }
2812
2813 /*
2814 * Found IO that is still pending with firmware and
2815 * belongs to the LUN that we are resetting
2816 */
2817 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2818 "Found IO in %s on lun\n",
2819 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2820
2821 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2822 ret = 1;
2823 spin_unlock_irqrestore(io_lock, flags);
2824 }
2825
2826 return ret;
2827 }
2828
