1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18 #include <linux/mempool.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/workqueue.h>
22 #include <linux/pci.h>
23 #include <linux/scatterlist.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/etherdevice.h>
27 #include <linux/if_ether.h>
28 #include <linux/if_vlan.h>
29 #include <linux/delay.h>
30 #include <linux/gfp.h>
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_host.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/scsi_cmnd.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/fc/fc_els.h>
37 #include <scsi/fc/fc_fcoe.h>
38 #include <scsi/libfc.h>
39 #include <scsi/fc_frame.h>
40 #include "fnic_io.h"
41 #include "fnic.h"
42
43 const char *fnic_state_str[] = {
44 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
45 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
46 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
47 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
48 };
49
50 static const char *fnic_ioreq_state_str[] = {
51 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
52 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
53 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
54 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
55 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
56 };
57
58 static const char *fcpio_status_str[] = {
59 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
60 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
61 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
62 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
63 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
64 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
65 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
66 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
67 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
68 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
69 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
70 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
71 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
72 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
73 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
74 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
75 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
76 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
77 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
78 };
79
fnic_state_to_str(unsigned int state)80 const char *fnic_state_to_str(unsigned int state)
81 {
82 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
83 return "unknown";
84
85 return fnic_state_str[state];
86 }
87
fnic_ioreq_state_to_str(unsigned int state)88 static const char *fnic_ioreq_state_to_str(unsigned int state)
89 {
90 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
91 !fnic_ioreq_state_str[state])
92 return "unknown";
93
94 return fnic_ioreq_state_str[state];
95 }
96
fnic_fcpio_status_to_str(unsigned int status)97 static const char *fnic_fcpio_status_to_str(unsigned int status)
98 {
99 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
100 return "unknown";
101
102 return fcpio_status_str[status];
103 }
104
105 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
106
fnic_io_lock_hash(struct fnic * fnic,struct scsi_cmnd * sc)107 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
108 struct scsi_cmnd *sc)
109 {
110 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
111
112 return &fnic->io_req_lock[hash];
113 }
114
fnic_io_lock_tag(struct fnic * fnic,int tag)115 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
116 int tag)
117 {
118 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
119 }
120
121 /*
122 * Unmap the data buffer and sense buffer for an io_req,
123 * also unmap and free the device-private scatter/gather list.
124 */
fnic_release_ioreq_buf(struct fnic * fnic,struct fnic_io_req * io_req,struct scsi_cmnd * sc)125 static void fnic_release_ioreq_buf(struct fnic *fnic,
126 struct fnic_io_req *io_req,
127 struct scsi_cmnd *sc)
128 {
129 if (io_req->sgl_list_pa)
130 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
131 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
132 DMA_TO_DEVICE);
133 scsi_dma_unmap(sc);
134
135 if (io_req->sgl_cnt)
136 mempool_free(io_req->sgl_list_alloc,
137 fnic->io_sgl_pool[io_req->sgl_type]);
138 if (io_req->sense_buf_pa)
139 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
140 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
141 }
142
143 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
free_wq_copy_descs(struct fnic * fnic,struct vnic_wq_copy * wq)144 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
145 {
146 /* if no Ack received from firmware, then nothing to clean */
147 if (!fnic->fw_ack_recd[0])
148 return 1;
149
150 /*
151 * Update desc_available count based on number of freed descriptors
152 * Account for wraparound
153 */
154 if (wq->to_clean_index <= fnic->fw_ack_index[0])
155 wq->ring.desc_avail += (fnic->fw_ack_index[0]
156 - wq->to_clean_index + 1);
157 else
158 wq->ring.desc_avail += (wq->ring.desc_count
159 - wq->to_clean_index
160 + fnic->fw_ack_index[0] + 1);
161
162 /*
163 * just bump clean index to ack_index+1 accounting for wraparound
164 * this will essentially free up all descriptors between
165 * to_clean_index and fw_ack_index, both inclusive
166 */
167 wq->to_clean_index =
168 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
169
170 /* we have processed the acks received so far */
171 fnic->fw_ack_recd[0] = 0;
172 return 0;
173 }
174
175
176 /**
177 * __fnic_set_state_flags
178 * Sets/Clears bits in fnic's state_flags
179 **/
180 void
__fnic_set_state_flags(struct fnic * fnic,unsigned long st_flags,unsigned long clearbits)181 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
182 unsigned long clearbits)
183 {
184 unsigned long flags = 0;
185 unsigned long host_lock_flags = 0;
186
187 spin_lock_irqsave(&fnic->fnic_lock, flags);
188 spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);
189
190 if (clearbits)
191 fnic->state_flags &= ~st_flags;
192 else
193 fnic->state_flags |= st_flags;
194
195 spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags);
196 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
197
198 return;
199 }
200
201
202 /*
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
205 */
fnic_fw_reset_handler(struct fnic * fnic)206 int fnic_fw_reset_handler(struct fnic *fnic)
207 {
208 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
209 int ret = 0;
210 unsigned long flags;
211
212 /* indicate fwreset to io path */
213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
214
215 skb_queue_purge(&fnic->frame_queue);
216 skb_queue_purge(&fnic->tx_queue);
217
218 /* wait for io cmpl */
219 while (atomic_read(&fnic->in_flight))
220 schedule_timeout(msecs_to_jiffies(1));
221
222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
223
224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
225 free_wq_copy_descs(fnic, wq);
226
227 if (!vnic_wq_copy_desc_avail(wq))
228 ret = -EAGAIN;
229 else {
230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
235 atomic64_read(
236 &fnic->fnic_stats.fw_stats.active_fw_reqs));
237 }
238
239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
240
241 if (!ret) {
242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
244 "Issued fw reset\n");
245 } else {
246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
248 "Failed to issue fw reset\n");
249 }
250
251 return ret;
252 }
253
254
255 /*
256 * fnic_flogi_reg_handler
257 * Routine to send flogi register msg to fw
258 */
fnic_flogi_reg_handler(struct fnic * fnic,u32 fc_id)259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
260 {
261 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
262 enum fcpio_flogi_reg_format_type format;
263 struct fc_lport *lp = fnic->lport;
264 u8 gw_mac[ETH_ALEN];
265 int ret = 0;
266 unsigned long flags;
267
268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
269
270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
271 free_wq_copy_descs(fnic, wq);
272
273 if (!vnic_wq_copy_desc_avail(wq)) {
274 ret = -EAGAIN;
275 goto flogi_reg_ioreq_end;
276 }
277
278 if (fnic->ctlr.map_dest) {
279 eth_broadcast_addr(gw_mac);
280 format = FCPIO_FLOGI_REG_DEF_DEST;
281 } else {
282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
283 format = FCPIO_FLOGI_REG_GW_DEST;
284 }
285
286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
288 fc_id, gw_mac,
289 fnic->data_src_addr,
290 lp->r_a_tov, lp->e_d_tov);
291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
293 fc_id, fnic->data_src_addr, gw_mac);
294 } else {
295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
296 format, fc_id, gw_mac);
297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
298 "FLOGI reg issued fcid %x map %d dest %pM\n",
299 fc_id, fnic->ctlr.map_dest, gw_mac);
300 }
301
302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
307
308 flogi_reg_ioreq_end:
309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
310 return ret;
311 }
312
313 /*
314 * fnic_queue_wq_copy_desc
315 * Routine to enqueue a wq copy desc
316 */
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)317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
318 struct vnic_wq_copy *wq,
319 struct fnic_io_req *io_req,
320 struct scsi_cmnd *sc,
321 int sg_count)
322 {
323 struct scatterlist *sg;
324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
325 struct fc_rport_libfc_priv *rp = rport->dd_data;
326 struct host_sg_desc *desc;
327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
328 unsigned int i;
329 unsigned long intr_flags;
330 int flags;
331 u8 exch_flags;
332 struct scsi_lun fc_lun;
333
334 if (sg_count) {
335 /* For each SGE, create a device desc entry */
336 desc = io_req->sgl_list;
337 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
338 desc->addr = cpu_to_le64(sg_dma_address(sg));
339 desc->len = cpu_to_le32(sg_dma_len(sg));
340 desc->_resvd = 0;
341 desc++;
342 }
343
344 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
345 io_req->sgl_list,
346 sizeof(io_req->sgl_list[0]) * sg_count,
347 DMA_TO_DEVICE);
348 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {
349 printk(KERN_ERR "DMA mapping failed\n");
350 return SCSI_MLQUEUE_HOST_BUSY;
351 }
352 }
353
354 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
355 sc->sense_buffer,
356 SCSI_SENSE_BUFFERSIZE,
357 DMA_FROM_DEVICE);
358 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {
359 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
360 sizeof(io_req->sgl_list[0]) * sg_count,
361 DMA_TO_DEVICE);
362 printk(KERN_ERR "DMA mapping failed\n");
363 return SCSI_MLQUEUE_HOST_BUSY;
364 }
365
366 int_to_scsilun(sc->device->lun, &fc_lun);
367
368 /* Enqueue the descriptor in the Copy WQ */
369 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
370
371 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
372 free_wq_copy_descs(fnic, wq);
373
374 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
375 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
376 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
377 "fnic_queue_wq_copy_desc failure - no descriptors\n");
378 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
379 return SCSI_MLQUEUE_HOST_BUSY;
380 }
381
382 flags = 0;
383 if (sc->sc_data_direction == DMA_FROM_DEVICE)
384 flags = FCPIO_ICMND_RDDATA;
385 else if (sc->sc_data_direction == DMA_TO_DEVICE)
386 flags = FCPIO_ICMND_WRDATA;
387
388 exch_flags = 0;
389 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
390 (rp->flags & FC_RP_FLAGS_RETRY))
391 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
392
393 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
394 0, exch_flags, io_req->sgl_cnt,
395 SCSI_SENSE_BUFFERSIZE,
396 io_req->sgl_list_pa,
397 io_req->sense_buf_pa,
398 0, /* scsi cmd ref, always 0 */
399 FCPIO_ICMND_PTA_SIMPLE,
400 /* scsi pri and tag */
401 flags, /* command flags */
402 sc->cmnd, sc->cmd_len,
403 scsi_bufflen(sc),
404 fc_lun.scsi_lun, io_req->port_id,
405 rport->maxframe_size, rp->r_a_tov,
406 rp->e_d_tov);
407
408 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
409 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
410 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
411 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
412 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
413
414 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
415 return 0;
416 }
417
418 /*
419 * fnic_queuecommand
420 * Routine to send a scsi cdb
421 * Called with host_lock held and interrupts disabled.
422 */
fnic_queuecommand_lck(struct scsi_cmnd * sc,void (* done)(struct scsi_cmnd *))423 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
424 {
425 struct fc_lport *lp = shost_priv(sc->device->host);
426 struct fc_rport *rport;
427 struct fnic_io_req *io_req = NULL;
428 struct fnic *fnic = lport_priv(lp);
429 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
430 struct vnic_wq_copy *wq;
431 int ret;
432 u64 cmd_trace;
433 int sg_count = 0;
434 unsigned long flags = 0;
435 unsigned long ptr;
436 spinlock_t *io_lock = NULL;
437 int io_lock_acquired = 0;
438 struct fc_rport_libfc_priv *rp;
439
440 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
441 return SCSI_MLQUEUE_HOST_BUSY;
442
443 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET)))
444 return SCSI_MLQUEUE_HOST_BUSY;
445
446 rport = starget_to_rport(scsi_target(sc->device));
447 if (!rport) {
448 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
449 "returning DID_NO_CONNECT for IO as rport is NULL\n");
450 sc->result = DID_NO_CONNECT << 16;
451 done(sc);
452 return 0;
453 }
454
455 ret = fc_remote_port_chkready(rport);
456 if (ret) {
457 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
458 "rport is not ready\n");
459 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
460 sc->result = ret;
461 done(sc);
462 return 0;
463 }
464
465 rp = rport->dd_data;
466 if (!rp || rp->rp_state == RPORT_ST_DELETE) {
467 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
468 "rport 0x%x removed, returning DID_NO_CONNECT\n",
469 rport->port_id);
470
471 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
472 sc->result = DID_NO_CONNECT<<16;
473 done(sc);
474 return 0;
475 }
476
477 if (rp->rp_state != RPORT_ST_READY) {
478 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
479 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
480 rport->port_id, rp->rp_state);
481
482 sc->result = DID_IMM_RETRY << 16;
483 done(sc);
484 return 0;
485 }
486
487 if (lp->state != LPORT_ST_READY || !(lp->link_up))
488 return SCSI_MLQUEUE_HOST_BUSY;
489
490 atomic_inc(&fnic->in_flight);
491
492 /*
493 * Release host lock, use driver resource specific locks from here.
494 * Don't re-enable interrupts in case they were disabled prior to the
495 * caller disabling them.
496 */
497 spin_unlock(lp->host->host_lock);
498 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
499 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
500
501 /* Get a new io_req for this SCSI IO */
502 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
503 if (!io_req) {
504 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
505 ret = SCSI_MLQUEUE_HOST_BUSY;
506 goto out;
507 }
508 memset(io_req, 0, sizeof(*io_req));
509
510 /* Map the data buffer */
511 sg_count = scsi_dma_map(sc);
512 if (sg_count < 0) {
513 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
514 sc->request->tag, sc, 0, sc->cmnd[0],
515 sg_count, CMD_STATE(sc));
516 mempool_free(io_req, fnic->io_req_pool);
517 goto out;
518 }
519
520 /* Determine the type of scatter/gather list we need */
521 io_req->sgl_cnt = sg_count;
522 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
523 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
524 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
525
526 if (sg_count) {
527 io_req->sgl_list =
528 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
529 GFP_ATOMIC);
530 if (!io_req->sgl_list) {
531 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
532 ret = SCSI_MLQUEUE_HOST_BUSY;
533 scsi_dma_unmap(sc);
534 mempool_free(io_req, fnic->io_req_pool);
535 goto out;
536 }
537
538 /* Cache sgl list allocated address before alignment */
539 io_req->sgl_list_alloc = io_req->sgl_list;
540 ptr = (unsigned long) io_req->sgl_list;
541 if (ptr % FNIC_SG_DESC_ALIGN) {
542 io_req->sgl_list = (struct host_sg_desc *)
543 (((unsigned long) ptr
544 + FNIC_SG_DESC_ALIGN - 1)
545 & ~(FNIC_SG_DESC_ALIGN - 1));
546 }
547 }
548
549 /*
550 * Will acquire lock defore setting to IO initialized.
551 */
552
553 io_lock = fnic_io_lock_hash(fnic, sc);
554 spin_lock_irqsave(io_lock, flags);
555
556 /* initialize rest of io_req */
557 io_lock_acquired = 1;
558 io_req->port_id = rport->port_id;
559 io_req->start_time = jiffies;
560 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
561 CMD_SP(sc) = (char *)io_req;
562 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
563 sc->scsi_done = done;
564
565 /* create copy wq desc and enqueue it */
566 wq = &fnic->wq_copy[0];
567 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
568 if (ret) {
569 /*
570 * In case another thread cancelled the request,
571 * refetch the pointer under the lock.
572 */
573 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
574 sc->request->tag, sc, 0, 0, 0,
575 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
576 io_req = (struct fnic_io_req *)CMD_SP(sc);
577 CMD_SP(sc) = NULL;
578 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
579 spin_unlock_irqrestore(io_lock, flags);
580 if (io_req) {
581 fnic_release_ioreq_buf(fnic, io_req, sc);
582 mempool_free(io_req, fnic->io_req_pool);
583 }
584 atomic_dec(&fnic->in_flight);
585 /* acquire host lock before returning to SCSI */
586 spin_lock(lp->host->host_lock);
587 return ret;
588 } else {
589 atomic64_inc(&fnic_stats->io_stats.active_ios);
590 atomic64_inc(&fnic_stats->io_stats.num_ios);
591 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
592 atomic64_read(&fnic_stats->io_stats.max_active_ios))
593 atomic64_set(&fnic_stats->io_stats.max_active_ios,
594 atomic64_read(&fnic_stats->io_stats.active_ios));
595
596 /* REVISIT: Use per IO lock in the final code */
597 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
598 }
599 out:
600 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
601 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
602 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
603 sc->cmnd[5]);
604
605 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
606 sc->request->tag, sc, io_req,
607 sg_count, cmd_trace,
608 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
609
610 /* if only we issued IO, will we have the io lock */
611 if (io_lock_acquired)
612 spin_unlock_irqrestore(io_lock, flags);
613
614 atomic_dec(&fnic->in_flight);
615 /* acquire host lock before returning to SCSI */
616 spin_lock(lp->host->host_lock);
617 return ret;
618 }
619
DEF_SCSI_QCMD(fnic_queuecommand)620 DEF_SCSI_QCMD(fnic_queuecommand)
621
622 /*
623 * fnic_fcpio_fw_reset_cmpl_handler
624 * Routine to handle fw reset completion
625 */
626 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
627 struct fcpio_fw_req *desc)
628 {
629 u8 type;
630 u8 hdr_status;
631 struct fcpio_tag tag;
632 int ret = 0;
633 unsigned long flags;
634 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
635
636 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
637
638 atomic64_inc(&reset_stats->fw_reset_completions);
639
640 /* Clean up all outstanding io requests */
641 fnic_cleanup_io(fnic, SCSI_NO_TAG);
642
643 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
644 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
645 atomic64_set(&fnic->io_cmpl_skip, 0);
646
647 spin_lock_irqsave(&fnic->fnic_lock, flags);
648
649 /* fnic should be in FC_TRANS_ETH_MODE */
650 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
651 /* Check status of reset completion */
652 if (!hdr_status) {
653 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
654 "reset cmpl success\n");
655 /* Ready to send flogi out */
656 fnic->state = FNIC_IN_ETH_MODE;
657 } else {
658 FNIC_SCSI_DBG(KERN_DEBUG,
659 fnic->lport->host,
660 "fnic fw_reset : failed %s\n",
661 fnic_fcpio_status_to_str(hdr_status));
662
663 /*
664 * Unable to change to eth mode, cannot send out flogi
665 * Change state to fc mode, so that subsequent Flogi
666 * requests from libFC will cause more attempts to
667 * reset the firmware. Free the cached flogi
668 */
669 fnic->state = FNIC_IN_FC_MODE;
670 atomic64_inc(&reset_stats->fw_reset_failures);
671 ret = -1;
672 }
673 } else {
674 FNIC_SCSI_DBG(KERN_DEBUG,
675 fnic->lport->host,
676 "Unexpected state %s while processing"
677 " reset cmpl\n", fnic_state_to_str(fnic->state));
678 atomic64_inc(&reset_stats->fw_reset_failures);
679 ret = -1;
680 }
681
682 /* Thread removing device blocks till firmware reset is complete */
683 if (fnic->remove_wait)
684 complete(fnic->remove_wait);
685
686 /*
687 * If fnic is being removed, or fw reset failed
688 * free the flogi frame. Else, send it out
689 */
690 if (fnic->remove_wait || ret) {
691 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
692 skb_queue_purge(&fnic->tx_queue);
693 goto reset_cmpl_handler_end;
694 }
695
696 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
697
698 fnic_flush_tx(fnic);
699
700 reset_cmpl_handler_end:
701 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
702
703 return ret;
704 }
705
706 /*
707 * fnic_fcpio_flogi_reg_cmpl_handler
708 * Routine to handle flogi register completion
709 */
fnic_fcpio_flogi_reg_cmpl_handler(struct fnic * fnic,struct fcpio_fw_req * desc)710 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
711 struct fcpio_fw_req *desc)
712 {
713 u8 type;
714 u8 hdr_status;
715 struct fcpio_tag tag;
716 int ret = 0;
717 unsigned long flags;
718
719 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
720
721 /* Update fnic state based on status of flogi reg completion */
722 spin_lock_irqsave(&fnic->fnic_lock, flags);
723
724 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
725
726 /* Check flogi registration completion status */
727 if (!hdr_status) {
728 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
729 "flog reg succeeded\n");
730 fnic->state = FNIC_IN_FC_MODE;
731 } else {
732 FNIC_SCSI_DBG(KERN_DEBUG,
733 fnic->lport->host,
734 "fnic flogi reg :failed %s\n",
735 fnic_fcpio_status_to_str(hdr_status));
736 fnic->state = FNIC_IN_ETH_MODE;
737 ret = -1;
738 }
739 } else {
740 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
741 "Unexpected fnic state %s while"
742 " processing flogi reg completion\n",
743 fnic_state_to_str(fnic->state));
744 ret = -1;
745 }
746
747 if (!ret) {
748 if (fnic->stop_rx_link_events) {
749 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
750 goto reg_cmpl_handler_end;
751 }
752 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
753
754 fnic_flush_tx(fnic);
755 queue_work(fnic_event_queue, &fnic->frame_work);
756 } else {
757 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
758 }
759
760 reg_cmpl_handler_end:
761 return ret;
762 }
763
is_ack_index_in_range(struct vnic_wq_copy * wq,u16 request_out)764 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
765 u16 request_out)
766 {
767 if (wq->to_clean_index <= wq->to_use_index) {
768 /* out of range, stale request_out index */
769 if (request_out < wq->to_clean_index ||
770 request_out >= wq->to_use_index)
771 return 0;
772 } else {
773 /* out of range, stale request_out index */
774 if (request_out < wq->to_clean_index &&
775 request_out >= wq->to_use_index)
776 return 0;
777 }
778 /* request_out index is in range */
779 return 1;
780 }
781
782
783 /*
784 * Mark that ack received and store the Ack index. If there are multiple
785 * acks received before Tx thread cleans it up, the latest value will be
786 * used which is correct behavior. This state should be in the copy Wq
787 * instead of in the fnic
788 */
fnic_fcpio_ack_handler(struct fnic * fnic,unsigned int cq_index,struct fcpio_fw_req * desc)789 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
790 unsigned int cq_index,
791 struct fcpio_fw_req *desc)
792 {
793 struct vnic_wq_copy *wq;
794 u16 request_out = desc->u.ack.request_out;
795 unsigned long flags;
796 u64 *ox_id_tag = (u64 *)(void *)desc;
797
798 /* mark the ack state */
799 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
800 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
801
802 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
803 if (is_ack_index_in_range(wq, request_out)) {
804 fnic->fw_ack_index[0] = request_out;
805 fnic->fw_ack_recd[0] = 1;
806 } else
807 atomic64_inc(
808 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
809
810 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
811 FNIC_TRACE(fnic_fcpio_ack_handler,
812 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
813 ox_id_tag[4], ox_id_tag[5]);
814 }
815
816 /*
817 * fnic_fcpio_icmnd_cmpl_handler
818 * Routine to handle icmnd completions
819 */
fnic_fcpio_icmnd_cmpl_handler(struct fnic * fnic,struct fcpio_fw_req * desc)820 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
821 struct fcpio_fw_req *desc)
822 {
823 u8 type;
824 u8 hdr_status;
825 struct fcpio_tag tag;
826 u32 id;
827 u64 xfer_len = 0;
828 struct fcpio_icmnd_cmpl *icmnd_cmpl;
829 struct fnic_io_req *io_req;
830 struct scsi_cmnd *sc;
831 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
832 unsigned long flags;
833 spinlock_t *io_lock;
834 u64 cmd_trace;
835 unsigned long start_time;
836 unsigned long io_duration_time;
837
838 /* Decode the cmpl description to get the io_req id */
839 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
840 fcpio_tag_id_dec(&tag, &id);
841 icmnd_cmpl = &desc->u.icmnd_cmpl;
842
843 if (id >= fnic->fnic_max_tag_id) {
844 shost_printk(KERN_ERR, fnic->lport->host,
845 "Tag out of range tag %x hdr status = %s\n",
846 id, fnic_fcpio_status_to_str(hdr_status));
847 return;
848 }
849
850 sc = scsi_host_find_tag(fnic->lport->host, id);
851 WARN_ON_ONCE(!sc);
852 if (!sc) {
853 atomic64_inc(&fnic_stats->io_stats.sc_null);
854 shost_printk(KERN_ERR, fnic->lport->host,
855 "icmnd_cmpl sc is null - "
856 "hdr status = %s tag = 0x%x desc = 0x%p\n",
857 fnic_fcpio_status_to_str(hdr_status), id, desc);
858 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
859 fnic->lport->host->host_no, id,
860 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
861 (u64)icmnd_cmpl->_resvd0[0]),
862 ((u64)hdr_status << 16 |
863 (u64)icmnd_cmpl->scsi_status << 8 |
864 (u64)icmnd_cmpl->flags), desc,
865 (u64)icmnd_cmpl->residual, 0);
866 return;
867 }
868
869 io_lock = fnic_io_lock_hash(fnic, sc);
870 spin_lock_irqsave(io_lock, flags);
871 io_req = (struct fnic_io_req *)CMD_SP(sc);
872 WARN_ON_ONCE(!io_req);
873 if (!io_req) {
874 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
875 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
876 spin_unlock_irqrestore(io_lock, flags);
877 shost_printk(KERN_ERR, fnic->lport->host,
878 "icmnd_cmpl io_req is null - "
879 "hdr status = %s tag = 0x%x sc 0x%p\n",
880 fnic_fcpio_status_to_str(hdr_status), id, sc);
881 return;
882 }
883 start_time = io_req->start_time;
884
885 /* firmware completed the io */
886 io_req->io_completed = 1;
887
888 /*
889 * if SCSI-ML has already issued abort on this command,
890 * set completion of the IO. The abts path will clean it up
891 */
892 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
893
894 /*
895 * set the FNIC_IO_DONE so that this doesn't get
896 * flagged as 'out of order' if it was not aborted
897 */
898 CMD_FLAGS(sc) |= FNIC_IO_DONE;
899 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
900 spin_unlock_irqrestore(io_lock, flags);
901 if(FCPIO_ABORTED == hdr_status)
902 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
903
904 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
905 "icmnd_cmpl abts pending "
906 "hdr status = %s tag = 0x%x sc = 0x%p "
907 "scsi_status = %x residual = %d\n",
908 fnic_fcpio_status_to_str(hdr_status),
909 id, sc,
910 icmnd_cmpl->scsi_status,
911 icmnd_cmpl->residual);
912 return;
913 }
914
915 /* Mark the IO as complete */
916 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
917
918 icmnd_cmpl = &desc->u.icmnd_cmpl;
919
920 switch (hdr_status) {
921 case FCPIO_SUCCESS:
922 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
923 xfer_len = scsi_bufflen(sc);
924 scsi_set_resid(sc, icmnd_cmpl->residual);
925
926 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
927 xfer_len -= icmnd_cmpl->residual;
928
929 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
930 atomic64_inc(&fnic_stats->misc_stats.check_condition);
931
932 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
933 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
934 break;
935
936 case FCPIO_TIMEOUT: /* request was timed out */
937 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
938 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
939 break;
940
941 case FCPIO_ABORTED: /* request was aborted */
942 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
943 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
944 break;
945
946 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
947 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
948 scsi_set_resid(sc, icmnd_cmpl->residual);
949 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
950 break;
951
952 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
953 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
954 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
955 break;
956
957 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
958 atomic64_inc(&fnic_stats->io_stats.io_not_found);
959 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
960 break;
961
962 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
963 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
964 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
965 break;
966
967 case FCPIO_FW_ERR: /* request was terminated due fw error */
968 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
969 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
970 break;
971
972 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
973 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
974 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
975 break;
976
977 case FCPIO_INVALID_HEADER: /* header contains invalid data */
978 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
979 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
980 default:
981 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
982 break;
983 }
984
985 /* Break link with the SCSI command */
986 CMD_SP(sc) = NULL;
987 CMD_FLAGS(sc) |= FNIC_IO_DONE;
988
989 spin_unlock_irqrestore(io_lock, flags);
990
991 if (hdr_status != FCPIO_SUCCESS) {
992 atomic64_inc(&fnic_stats->io_stats.io_failures);
993 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
994 fnic_fcpio_status_to_str(hdr_status));
995 }
996
997 fnic_release_ioreq_buf(fnic, io_req, sc);
998
999 mempool_free(io_req, fnic->io_req_pool);
1000
1001 cmd_trace = ((u64)hdr_status << 56) |
1002 (u64)icmnd_cmpl->scsi_status << 48 |
1003 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
1004 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1005 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
1006
1007 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
1008 sc->device->host->host_no, id, sc,
1009 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
1010 (u64)icmnd_cmpl->_resvd0[0] << 48 |
1011 jiffies_to_msecs(jiffies - start_time)),
1012 desc, cmd_trace,
1013 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1014
1015 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1016 fnic->lport->host_stats.fcp_input_requests++;
1017 fnic->fcp_input_bytes += xfer_len;
1018 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1019 fnic->lport->host_stats.fcp_output_requests++;
1020 fnic->fcp_output_bytes += xfer_len;
1021 } else
1022 fnic->lport->host_stats.fcp_control_requests++;
1023
1024 atomic64_dec(&fnic_stats->io_stats.active_ios);
1025 if (atomic64_read(&fnic->io_cmpl_skip))
1026 atomic64_dec(&fnic->io_cmpl_skip);
1027 else
1028 atomic64_inc(&fnic_stats->io_stats.io_completions);
1029
1030
1031 io_duration_time = jiffies_to_msecs(jiffies) -
1032 jiffies_to_msecs(start_time);
1033
1034 if(io_duration_time <= 10)
1035 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
1036 else if(io_duration_time <= 100)
1037 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
1038 else if(io_duration_time <= 500)
1039 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
1040 else if(io_duration_time <= 5000)
1041 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
1042 else if(io_duration_time <= 10000)
1043 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
1044 else if(io_duration_time <= 30000)
1045 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
1046 else {
1047 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
1048
1049 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
1050 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
1051 }
1052
1053 /* Call SCSI completion function to complete the IO */
1054 if (sc->scsi_done)
1055 sc->scsi_done(sc);
1056 }
1057
1058 /* fnic_fcpio_itmf_cmpl_handler
1059 * Routine to handle itmf completions
1060 */
fnic_fcpio_itmf_cmpl_handler(struct fnic * fnic,struct fcpio_fw_req * desc)1061 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1062 struct fcpio_fw_req *desc)
1063 {
1064 u8 type;
1065 u8 hdr_status;
1066 struct fcpio_tag tag;
1067 u32 id;
1068 struct scsi_cmnd *sc;
1069 struct fnic_io_req *io_req;
1070 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1071 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1072 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1073 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1074 unsigned long flags;
1075 spinlock_t *io_lock;
1076 unsigned long start_time;
1077
1078 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1079 fcpio_tag_id_dec(&tag, &id);
1080
1081 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1082 shost_printk(KERN_ERR, fnic->lport->host,
1083 "Tag out of range tag %x hdr status = %s\n",
1084 id, fnic_fcpio_status_to_str(hdr_status));
1085 return;
1086 }
1087
1088 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1089 WARN_ON_ONCE(!sc);
1090 if (!sc) {
1091 atomic64_inc(&fnic_stats->io_stats.sc_null);
1092 shost_printk(KERN_ERR, fnic->lport->host,
1093 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1094 fnic_fcpio_status_to_str(hdr_status), id);
1095 return;
1096 }
1097 io_lock = fnic_io_lock_hash(fnic, sc);
1098 spin_lock_irqsave(io_lock, flags);
1099 io_req = (struct fnic_io_req *)CMD_SP(sc);
1100 WARN_ON_ONCE(!io_req);
1101 if (!io_req) {
1102 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1103 spin_unlock_irqrestore(io_lock, flags);
1104 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1105 shost_printk(KERN_ERR, fnic->lport->host,
1106 "itmf_cmpl io_req is null - "
1107 "hdr status = %s tag = 0x%x sc 0x%p\n",
1108 fnic_fcpio_status_to_str(hdr_status), id, sc);
1109 return;
1110 }
1111 start_time = io_req->start_time;
1112
1113 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1114 /* Abort and terminate completion of device reset req */
1115 /* REVISIT : Add asserts about various flags */
1116 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1117 "dev reset abts cmpl recd. id %x status %s\n",
1118 id, fnic_fcpio_status_to_str(hdr_status));
1119 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1120 CMD_ABTS_STATUS(sc) = hdr_status;
1121 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1122 if (io_req->abts_done)
1123 complete(io_req->abts_done);
1124 spin_unlock_irqrestore(io_lock, flags);
1125 } else if (id & FNIC_TAG_ABORT) {
1126 /* Completion of abort cmd */
1127 switch (hdr_status) {
1128 case FCPIO_SUCCESS:
1129 break;
1130 case FCPIO_TIMEOUT:
1131 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1132 atomic64_inc(&abts_stats->abort_fw_timeouts);
1133 else
1134 atomic64_inc(
1135 &term_stats->terminate_fw_timeouts);
1136 break;
1137 case FCPIO_ITMF_REJECTED:
1138 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1139 "abort reject recd. id %d\n",
1140 (int)(id & FNIC_TAG_MASK));
1141 break;
1142 case FCPIO_IO_NOT_FOUND:
1143 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1144 atomic64_inc(&abts_stats->abort_io_not_found);
1145 else
1146 atomic64_inc(
1147 &term_stats->terminate_io_not_found);
1148 break;
1149 default:
1150 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1151 atomic64_inc(&abts_stats->abort_failures);
1152 else
1153 atomic64_inc(
1154 &term_stats->terminate_failures);
1155 break;
1156 }
1157 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1158 /* This is a late completion. Ignore it */
1159 spin_unlock_irqrestore(io_lock, flags);
1160 return;
1161 }
1162
1163 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1164 CMD_ABTS_STATUS(sc) = hdr_status;
1165
1166 /* If the status is IO not found consider it as success */
1167 if (hdr_status == FCPIO_IO_NOT_FOUND)
1168 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
1169
1170 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1171 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1172
1173 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1174 "abts cmpl recd. id %d status %s\n",
1175 (int)(id & FNIC_TAG_MASK),
1176 fnic_fcpio_status_to_str(hdr_status));
1177
1178 /*
1179 * If scsi_eh thread is blocked waiting for abts to complete,
1180 * signal completion to it. IO will be cleaned in the thread
1181 * else clean it in this context
1182 */
1183 if (io_req->abts_done) {
1184 complete(io_req->abts_done);
1185 spin_unlock_irqrestore(io_lock, flags);
1186 } else {
1187 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1188 "abts cmpl, completing IO\n");
1189 CMD_SP(sc) = NULL;
1190 sc->result = (DID_ERROR << 16);
1191
1192 spin_unlock_irqrestore(io_lock, flags);
1193
1194 fnic_release_ioreq_buf(fnic, io_req, sc);
1195 mempool_free(io_req, fnic->io_req_pool);
1196 if (sc->scsi_done) {
1197 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1198 sc->device->host->host_no, id,
1199 sc,
1200 jiffies_to_msecs(jiffies - start_time),
1201 desc,
1202 (((u64)hdr_status << 40) |
1203 (u64)sc->cmnd[0] << 32 |
1204 (u64)sc->cmnd[2] << 24 |
1205 (u64)sc->cmnd[3] << 16 |
1206 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1207 (((u64)CMD_FLAGS(sc) << 32) |
1208 CMD_STATE(sc)));
1209 sc->scsi_done(sc);
1210 atomic64_dec(&fnic_stats->io_stats.active_ios);
1211 if (atomic64_read(&fnic->io_cmpl_skip))
1212 atomic64_dec(&fnic->io_cmpl_skip);
1213 else
1214 atomic64_inc(&fnic_stats->io_stats.io_completions);
1215 }
1216 }
1217
1218 } else if (id & FNIC_TAG_DEV_RST) {
1219 /* Completion of device reset */
1220 CMD_LR_STATUS(sc) = hdr_status;
1221 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1222 spin_unlock_irqrestore(io_lock, flags);
1223 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1224 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1225 sc->device->host->host_no, id, sc,
1226 jiffies_to_msecs(jiffies - start_time),
1227 desc, 0,
1228 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1229 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1230 "Terminate pending "
1231 "dev reset cmpl recd. id %d status %s\n",
1232 (int)(id & FNIC_TAG_MASK),
1233 fnic_fcpio_status_to_str(hdr_status));
1234 return;
1235 }
1236 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1237 /* Need to wait for terminate completion */
1238 spin_unlock_irqrestore(io_lock, flags);
1239 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1240 sc->device->host->host_no, id, sc,
1241 jiffies_to_msecs(jiffies - start_time),
1242 desc, 0,
1243 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1244 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1245 "dev reset cmpl recd after time out. "
1246 "id %d status %s\n",
1247 (int)(id & FNIC_TAG_MASK),
1248 fnic_fcpio_status_to_str(hdr_status));
1249 return;
1250 }
1251 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1252 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1253 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1254 "dev reset cmpl recd. id %d status %s\n",
1255 (int)(id & FNIC_TAG_MASK),
1256 fnic_fcpio_status_to_str(hdr_status));
1257 if (io_req->dr_done)
1258 complete(io_req->dr_done);
1259 spin_unlock_irqrestore(io_lock, flags);
1260
1261 } else {
1262 shost_printk(KERN_ERR, fnic->lport->host,
1263 "Unexpected itmf io state %s tag %x\n",
1264 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1265 spin_unlock_irqrestore(io_lock, flags);
1266 }
1267
1268 }
1269
1270 /*
1271 * fnic_fcpio_cmpl_handler
1272 * Routine to service the cq for wq_copy
1273 */
fnic_fcpio_cmpl_handler(struct vnic_dev * vdev,unsigned int cq_index,struct fcpio_fw_req * desc)1274 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1275 unsigned int cq_index,
1276 struct fcpio_fw_req *desc)
1277 {
1278 struct fnic *fnic = vnic_dev_priv(vdev);
1279
1280 switch (desc->hdr.type) {
1281 case FCPIO_ICMND_CMPL: /* fw completed a command */
1282 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1283 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1284 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1285 case FCPIO_RESET_CMPL: /* fw completed reset */
1286 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1287 break;
1288 default:
1289 break;
1290 }
1291
1292 switch (desc->hdr.type) {
1293 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1294 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1295 break;
1296
1297 case FCPIO_ICMND_CMPL: /* fw completed a command */
1298 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1299 break;
1300
1301 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1302 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1303 break;
1304
1305 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1306 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1307 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1308 break;
1309
1310 case FCPIO_RESET_CMPL: /* fw completed reset */
1311 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1312 break;
1313
1314 default:
1315 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1316 "firmware completion type %d\n",
1317 desc->hdr.type);
1318 break;
1319 }
1320
1321 return 0;
1322 }
1323
1324 /*
1325 * fnic_wq_copy_cmpl_handler
1326 * Routine to process wq copy
1327 */
fnic_wq_copy_cmpl_handler(struct fnic * fnic,int copy_work_to_do)1328 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1329 {
1330 unsigned int wq_work_done = 0;
1331 unsigned int i, cq_index;
1332 unsigned int cur_work_done;
1333 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1334 u64 start_jiffies = 0;
1335 u64 end_jiffies = 0;
1336 u64 delta_jiffies = 0;
1337 u64 delta_ms = 0;
1338
1339 for (i = 0; i < fnic->wq_copy_count; i++) {
1340 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1341
1342 start_jiffies = jiffies;
1343 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1344 fnic_fcpio_cmpl_handler,
1345 copy_work_to_do);
1346 end_jiffies = jiffies;
1347
1348 wq_work_done += cur_work_done;
1349 delta_jiffies = end_jiffies - start_jiffies;
1350 if (delta_jiffies >
1351 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) {
1352 atomic64_set(&misc_stats->max_isr_jiffies,
1353 delta_jiffies);
1354 delta_ms = jiffies_to_msecs(delta_jiffies);
1355 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);
1356 atomic64_set(&misc_stats->corr_work_done,
1357 cur_work_done);
1358 }
1359 }
1360 return wq_work_done;
1361 }
1362
fnic_cleanup_io(struct fnic * fnic,int exclude_id)1363 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1364 {
1365 int i;
1366 struct fnic_io_req *io_req;
1367 unsigned long flags = 0;
1368 struct scsi_cmnd *sc;
1369 spinlock_t *io_lock;
1370 unsigned long start_time = 0;
1371 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1372
1373 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1374 if (i == exclude_id)
1375 continue;
1376
1377 io_lock = fnic_io_lock_tag(fnic, i);
1378 spin_lock_irqsave(io_lock, flags);
1379 sc = scsi_host_find_tag(fnic->lport->host, i);
1380 if (!sc) {
1381 spin_unlock_irqrestore(io_lock, flags);
1382 continue;
1383 }
1384
1385 io_req = (struct fnic_io_req *)CMD_SP(sc);
1386 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1387 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1388 /*
1389 * We will be here only when FW completes reset
1390 * without sending completions for outstanding ios.
1391 */
1392 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1393 if (io_req && io_req->dr_done)
1394 complete(io_req->dr_done);
1395 else if (io_req && io_req->abts_done)
1396 complete(io_req->abts_done);
1397 spin_unlock_irqrestore(io_lock, flags);
1398 continue;
1399 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1400 spin_unlock_irqrestore(io_lock, flags);
1401 continue;
1402 }
1403 if (!io_req) {
1404 spin_unlock_irqrestore(io_lock, flags);
1405 continue;
1406 }
1407
1408 CMD_SP(sc) = NULL;
1409
1410 spin_unlock_irqrestore(io_lock, flags);
1411
1412 /*
1413 * If there is a scsi_cmnd associated with this io_req, then
1414 * free the corresponding state
1415 */
1416 start_time = io_req->start_time;
1417 fnic_release_ioreq_buf(fnic, io_req, sc);
1418 mempool_free(io_req, fnic->io_req_pool);
1419
1420 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1421 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1422 "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
1423 __func__, sc->request->tag, sc,
1424 (jiffies - start_time));
1425
1426 if (atomic64_read(&fnic->io_cmpl_skip))
1427 atomic64_dec(&fnic->io_cmpl_skip);
1428 else
1429 atomic64_inc(&fnic_stats->io_stats.io_completions);
1430
1431 /* Complete the command to SCSI */
1432 if (sc->scsi_done) {
1433 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED))
1434 shost_printk(KERN_ERR, fnic->lport->host,
1435 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
1436 sc->request->tag, sc);
1437
1438 FNIC_TRACE(fnic_cleanup_io,
1439 sc->device->host->host_no, i, sc,
1440 jiffies_to_msecs(jiffies - start_time),
1441 0, ((u64)sc->cmnd[0] << 32 |
1442 (u64)sc->cmnd[2] << 24 |
1443 (u64)sc->cmnd[3] << 16 |
1444 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1445 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1446
1447 sc->scsi_done(sc);
1448 }
1449 }
1450 }
1451
fnic_wq_copy_cleanup_handler(struct vnic_wq_copy * wq,struct fcpio_host_req * desc)1452 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1453 struct fcpio_host_req *desc)
1454 {
1455 u32 id;
1456 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1457 struct fnic_io_req *io_req;
1458 struct scsi_cmnd *sc;
1459 unsigned long flags;
1460 spinlock_t *io_lock;
1461 unsigned long start_time = 0;
1462
1463 /* get the tag reference */
1464 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1465 id &= FNIC_TAG_MASK;
1466
1467 if (id >= fnic->fnic_max_tag_id)
1468 return;
1469
1470 sc = scsi_host_find_tag(fnic->lport->host, id);
1471 if (!sc)
1472 return;
1473
1474 io_lock = fnic_io_lock_hash(fnic, sc);
1475 spin_lock_irqsave(io_lock, flags);
1476
1477 /* Get the IO context which this desc refers to */
1478 io_req = (struct fnic_io_req *)CMD_SP(sc);
1479
1480 /* fnic interrupts are turned off by now */
1481
1482 if (!io_req) {
1483 spin_unlock_irqrestore(io_lock, flags);
1484 goto wq_copy_cleanup_scsi_cmd;
1485 }
1486
1487 CMD_SP(sc) = NULL;
1488
1489 spin_unlock_irqrestore(io_lock, flags);
1490
1491 start_time = io_req->start_time;
1492 fnic_release_ioreq_buf(fnic, io_req, sc);
1493 mempool_free(io_req, fnic->io_req_pool);
1494
1495 wq_copy_cleanup_scsi_cmd:
1496 sc->result = DID_NO_CONNECT << 16;
1497 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1498 " DID_NO_CONNECT\n");
1499
1500 if (sc->scsi_done) {
1501 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1502 sc->device->host->host_no, id, sc,
1503 jiffies_to_msecs(jiffies - start_time),
1504 0, ((u64)sc->cmnd[0] << 32 |
1505 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1506 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1507 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1508
1509 sc->scsi_done(sc);
1510 }
1511 }
1512
fnic_queue_abort_io_req(struct fnic * fnic,int tag,u32 task_req,u8 * fc_lun,struct fnic_io_req * io_req)1513 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1514 u32 task_req, u8 *fc_lun,
1515 struct fnic_io_req *io_req)
1516 {
1517 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1518 struct Scsi_Host *host = fnic->lport->host;
1519 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1520 unsigned long flags;
1521
1522 spin_lock_irqsave(host->host_lock, flags);
1523 if (unlikely(fnic_chk_state_flags_locked(fnic,
1524 FNIC_FLAGS_IO_BLOCKED))) {
1525 spin_unlock_irqrestore(host->host_lock, flags);
1526 return 1;
1527 } else
1528 atomic_inc(&fnic->in_flight);
1529 spin_unlock_irqrestore(host->host_lock, flags);
1530
1531 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1532
1533 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1534 free_wq_copy_descs(fnic, wq);
1535
1536 if (!vnic_wq_copy_desc_avail(wq)) {
1537 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1538 atomic_dec(&fnic->in_flight);
1539 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1540 "fnic_queue_abort_io_req: failure: no descriptors\n");
1541 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1542 return 1;
1543 }
1544 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1545 0, task_req, tag, fc_lun, io_req->port_id,
1546 fnic->config.ra_tov, fnic->config.ed_tov);
1547
1548 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1549 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1550 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1551 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1552 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1553
1554 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1555 atomic_dec(&fnic->in_flight);
1556
1557 return 0;
1558 }
1559
fnic_rport_exch_reset(struct fnic * fnic,u32 port_id)1560 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1561 {
1562 int tag;
1563 int abt_tag;
1564 int term_cnt = 0;
1565 struct fnic_io_req *io_req;
1566 spinlock_t *io_lock;
1567 unsigned long flags;
1568 struct scsi_cmnd *sc;
1569 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1570 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1571 struct scsi_lun fc_lun;
1572 enum fnic_ioreq_state old_ioreq_state;
1573
1574 FNIC_SCSI_DBG(KERN_DEBUG,
1575 fnic->lport->host,
1576 "fnic_rport_exch_reset called portid 0x%06x\n",
1577 port_id);
1578
1579 if (fnic->in_remove)
1580 return;
1581
1582 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1583 abt_tag = tag;
1584 io_lock = fnic_io_lock_tag(fnic, tag);
1585 spin_lock_irqsave(io_lock, flags);
1586 sc = scsi_host_find_tag(fnic->lport->host, tag);
1587 if (!sc) {
1588 spin_unlock_irqrestore(io_lock, flags);
1589 continue;
1590 }
1591
1592 io_req = (struct fnic_io_req *)CMD_SP(sc);
1593
1594 if (!io_req || io_req->port_id != port_id) {
1595 spin_unlock_irqrestore(io_lock, flags);
1596 continue;
1597 }
1598
1599 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1600 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1601 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1602 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1603 sc);
1604 spin_unlock_irqrestore(io_lock, flags);
1605 continue;
1606 }
1607
1608 /*
1609 * Found IO that is still pending with firmware and
1610 * belongs to rport that went away
1611 */
1612 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1613 spin_unlock_irqrestore(io_lock, flags);
1614 continue;
1615 }
1616 if (io_req->abts_done) {
1617 shost_printk(KERN_ERR, fnic->lport->host,
1618 "fnic_rport_exch_reset: io_req->abts_done is set "
1619 "state is %s\n",
1620 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1621 }
1622
1623 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1624 shost_printk(KERN_ERR, fnic->lport->host,
1625 "rport_exch_reset "
1626 "IO not yet issued %p tag 0x%x flags "
1627 "%x state %d\n",
1628 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1629 }
1630 old_ioreq_state = CMD_STATE(sc);
1631 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1632 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1633 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1634 atomic64_inc(&reset_stats->device_reset_terminates);
1635 abt_tag = (tag | FNIC_TAG_DEV_RST);
1636 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1637 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1638 sc);
1639 }
1640
1641 BUG_ON(io_req->abts_done);
1642
1643 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1644 "fnic_rport_reset_exch: Issuing abts\n");
1645
1646 spin_unlock_irqrestore(io_lock, flags);
1647
1648 /* Now queue the abort command to firmware */
1649 int_to_scsilun(sc->device->lun, &fc_lun);
1650
1651 if (fnic_queue_abort_io_req(fnic, abt_tag,
1652 FCPIO_ITMF_ABT_TASK_TERM,
1653 fc_lun.scsi_lun, io_req)) {
1654 /*
1655 * Revert the cmd state back to old state, if
1656 * it hasn't changed in between. This cmd will get
1657 * aborted later by scsi_eh, or cleaned up during
1658 * lun reset
1659 */
1660 spin_lock_irqsave(io_lock, flags);
1661 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1662 CMD_STATE(sc) = old_ioreq_state;
1663 spin_unlock_irqrestore(io_lock, flags);
1664 } else {
1665 spin_lock_irqsave(io_lock, flags);
1666 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1667 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1668 else
1669 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1670 spin_unlock_irqrestore(io_lock, flags);
1671 atomic64_inc(&term_stats->terminates);
1672 term_cnt++;
1673 }
1674 }
1675 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1676 atomic64_set(&term_stats->max_terminates, term_cnt);
1677
1678 }
1679
fnic_terminate_rport_io(struct fc_rport * rport)1680 void fnic_terminate_rport_io(struct fc_rport *rport)
1681 {
1682 int tag;
1683 int abt_tag;
1684 int term_cnt = 0;
1685 struct fnic_io_req *io_req;
1686 spinlock_t *io_lock;
1687 unsigned long flags;
1688 struct scsi_cmnd *sc;
1689 struct scsi_lun fc_lun;
1690 struct fc_rport_libfc_priv *rdata;
1691 struct fc_lport *lport;
1692 struct fnic *fnic;
1693 struct fc_rport *cmd_rport;
1694 struct reset_stats *reset_stats;
1695 struct terminate_stats *term_stats;
1696 enum fnic_ioreq_state old_ioreq_state;
1697
1698 if (!rport) {
1699 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1700 return;
1701 }
1702 rdata = rport->dd_data;
1703
1704 if (!rdata) {
1705 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1706 return;
1707 }
1708 lport = rdata->local_port;
1709
1710 if (!lport) {
1711 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1712 return;
1713 }
1714 fnic = lport_priv(lport);
1715 FNIC_SCSI_DBG(KERN_DEBUG,
1716 fnic->lport->host, "fnic_terminate_rport_io called"
1717 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1718 rport->port_name, rport->node_name, rport,
1719 rport->port_id);
1720
1721 if (fnic->in_remove)
1722 return;
1723
1724 reset_stats = &fnic->fnic_stats.reset_stats;
1725 term_stats = &fnic->fnic_stats.term_stats;
1726
1727 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1728 abt_tag = tag;
1729 io_lock = fnic_io_lock_tag(fnic, tag);
1730 spin_lock_irqsave(io_lock, flags);
1731 sc = scsi_host_find_tag(fnic->lport->host, tag);
1732 if (!sc) {
1733 spin_unlock_irqrestore(io_lock, flags);
1734 continue;
1735 }
1736
1737 cmd_rport = starget_to_rport(scsi_target(sc->device));
1738 if (rport != cmd_rport) {
1739 spin_unlock_irqrestore(io_lock, flags);
1740 continue;
1741 }
1742
1743 io_req = (struct fnic_io_req *)CMD_SP(sc);
1744
1745 if (!io_req || rport != cmd_rport) {
1746 spin_unlock_irqrestore(io_lock, flags);
1747 continue;
1748 }
1749
1750 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1751 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1752 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1753 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1754 sc);
1755 spin_unlock_irqrestore(io_lock, flags);
1756 continue;
1757 }
1758 /*
1759 * Found IO that is still pending with firmware and
1760 * belongs to rport that went away
1761 */
1762 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1763 spin_unlock_irqrestore(io_lock, flags);
1764 continue;
1765 }
1766 if (io_req->abts_done) {
1767 shost_printk(KERN_ERR, fnic->lport->host,
1768 "fnic_terminate_rport_io: io_req->abts_done is set "
1769 "state is %s\n",
1770 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1771 }
1772 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1773 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1774 "fnic_terminate_rport_io "
1775 "IO not yet issued %p tag 0x%x flags "
1776 "%x state %d\n",
1777 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1778 }
1779 old_ioreq_state = CMD_STATE(sc);
1780 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1781 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1782 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1783 atomic64_inc(&reset_stats->device_reset_terminates);
1784 abt_tag = (tag | FNIC_TAG_DEV_RST);
1785 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1786 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1787 }
1788
1789 BUG_ON(io_req->abts_done);
1790
1791 FNIC_SCSI_DBG(KERN_DEBUG,
1792 fnic->lport->host,
1793 "fnic_terminate_rport_io: Issuing abts\n");
1794
1795 spin_unlock_irqrestore(io_lock, flags);
1796
1797 /* Now queue the abort command to firmware */
1798 int_to_scsilun(sc->device->lun, &fc_lun);
1799
1800 if (fnic_queue_abort_io_req(fnic, abt_tag,
1801 FCPIO_ITMF_ABT_TASK_TERM,
1802 fc_lun.scsi_lun, io_req)) {
1803 /*
1804 * Revert the cmd state back to old state, if
1805 * it hasn't changed in between. This cmd will get
1806 * aborted later by scsi_eh, or cleaned up during
1807 * lun reset
1808 */
1809 spin_lock_irqsave(io_lock, flags);
1810 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1811 CMD_STATE(sc) = old_ioreq_state;
1812 spin_unlock_irqrestore(io_lock, flags);
1813 } else {
1814 spin_lock_irqsave(io_lock, flags);
1815 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1816 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1817 else
1818 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1819 spin_unlock_irqrestore(io_lock, flags);
1820 atomic64_inc(&term_stats->terminates);
1821 term_cnt++;
1822 }
1823 }
1824 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1825 atomic64_set(&term_stats->max_terminates, term_cnt);
1826
1827 }
1828
1829 /*
1830 * This function is exported to SCSI for sending abort cmnds.
1831 * A SCSI IO is represented by a io_req in the driver.
1832 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1833 */
fnic_abort_cmd(struct scsi_cmnd * sc)1834 int fnic_abort_cmd(struct scsi_cmnd *sc)
1835 {
1836 struct fc_lport *lp;
1837 struct fnic *fnic;
1838 struct fnic_io_req *io_req = NULL;
1839 struct fc_rport *rport;
1840 spinlock_t *io_lock;
1841 unsigned long flags;
1842 unsigned long start_time = 0;
1843 int ret = SUCCESS;
1844 u32 task_req = 0;
1845 struct scsi_lun fc_lun;
1846 struct fnic_stats *fnic_stats;
1847 struct abort_stats *abts_stats;
1848 struct terminate_stats *term_stats;
1849 enum fnic_ioreq_state old_ioreq_state;
1850 int tag;
1851 unsigned long abt_issued_time;
1852 DECLARE_COMPLETION_ONSTACK(tm_done);
1853
1854 /* Wait for rport to unblock */
1855 fc_block_scsi_eh(sc);
1856
1857 /* Get local-port, check ready and link up */
1858 lp = shost_priv(sc->device->host);
1859
1860 fnic = lport_priv(lp);
1861 fnic_stats = &fnic->fnic_stats;
1862 abts_stats = &fnic->fnic_stats.abts_stats;
1863 term_stats = &fnic->fnic_stats.term_stats;
1864
1865 rport = starget_to_rport(scsi_target(sc->device));
1866 tag = sc->request->tag;
1867 FNIC_SCSI_DBG(KERN_DEBUG,
1868 fnic->lport->host,
1869 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1870 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1871
1872 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1873
1874 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1875 ret = FAILED;
1876 goto fnic_abort_cmd_end;
1877 }
1878
1879 /*
1880 * Avoid a race between SCSI issuing the abort and the device
1881 * completing the command.
1882 *
1883 * If the command is already completed by the fw cmpl code,
1884 * we just return SUCCESS from here. This means that the abort
1885 * succeeded. In the SCSI ML, since the timeout for command has
1886 * happened, the completion wont actually complete the command
1887 * and it will be considered as an aborted command
1888 *
1889 * The CMD_SP will not be cleared except while holding io_req_lock.
1890 */
1891 io_lock = fnic_io_lock_hash(fnic, sc);
1892 spin_lock_irqsave(io_lock, flags);
1893 io_req = (struct fnic_io_req *)CMD_SP(sc);
1894 if (!io_req) {
1895 spin_unlock_irqrestore(io_lock, flags);
1896 goto fnic_abort_cmd_end;
1897 }
1898
1899 io_req->abts_done = &tm_done;
1900
1901 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1902 spin_unlock_irqrestore(io_lock, flags);
1903 goto wait_pending;
1904 }
1905
1906 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
1907 if (abt_issued_time <= 6000)
1908 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
1909 else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
1910 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
1911 else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
1912 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
1913 else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
1914 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
1915 else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
1916 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
1917 else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
1918 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
1919 else
1920 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
1921
1922 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1923 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
1924 /*
1925 * Command is still pending, need to abort it
1926 * If the firmware completes the command after this point,
1927 * the completion wont be done till mid-layer, since abort
1928 * has already started.
1929 */
1930 old_ioreq_state = CMD_STATE(sc);
1931 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1932 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1933
1934 spin_unlock_irqrestore(io_lock, flags);
1935
1936 /*
1937 * Check readiness of the remote port. If the path to remote
1938 * port is up, then send abts to the remote port to terminate
1939 * the IO. Else, just locally terminate the IO in the firmware
1940 */
1941 if (fc_remote_port_chkready(rport) == 0)
1942 task_req = FCPIO_ITMF_ABT_TASK;
1943 else {
1944 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1945 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1946 }
1947
1948 /* Now queue the abort command to firmware */
1949 int_to_scsilun(sc->device->lun, &fc_lun);
1950
1951 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1952 fc_lun.scsi_lun, io_req)) {
1953 spin_lock_irqsave(io_lock, flags);
1954 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1955 CMD_STATE(sc) = old_ioreq_state;
1956 io_req = (struct fnic_io_req *)CMD_SP(sc);
1957 if (io_req)
1958 io_req->abts_done = NULL;
1959 spin_unlock_irqrestore(io_lock, flags);
1960 ret = FAILED;
1961 goto fnic_abort_cmd_end;
1962 }
1963 if (task_req == FCPIO_ITMF_ABT_TASK) {
1964 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1965 atomic64_inc(&fnic_stats->abts_stats.aborts);
1966 } else {
1967 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1968 atomic64_inc(&fnic_stats->term_stats.terminates);
1969 }
1970
1971 /*
1972 * We queued an abort IO, wait for its completion.
1973 * Once the firmware completes the abort command, it will
1974 * wake up this thread.
1975 */
1976 wait_pending:
1977 wait_for_completion_timeout(&tm_done,
1978 msecs_to_jiffies
1979 (2 * fnic->config.ra_tov +
1980 fnic->config.ed_tov));
1981
1982 /* Check the abort status */
1983 spin_lock_irqsave(io_lock, flags);
1984
1985 io_req = (struct fnic_io_req *)CMD_SP(sc);
1986 if (!io_req) {
1987 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1988 spin_unlock_irqrestore(io_lock, flags);
1989 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1990 ret = FAILED;
1991 goto fnic_abort_cmd_end;
1992 }
1993 io_req->abts_done = NULL;
1994
1995 /* fw did not complete abort, timed out */
1996 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1997 spin_unlock_irqrestore(io_lock, flags);
1998 if (task_req == FCPIO_ITMF_ABT_TASK) {
1999 atomic64_inc(&abts_stats->abort_drv_timeouts);
2000 } else {
2001 atomic64_inc(&term_stats->terminate_drv_timeouts);
2002 }
2003 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
2004 ret = FAILED;
2005 goto fnic_abort_cmd_end;
2006 }
2007
2008 /* IO out of order */
2009
2010 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
2011 spin_unlock_irqrestore(io_lock, flags);
2012 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2013 "Issuing Host reset due to out of order IO\n");
2014
2015 ret = FAILED;
2016 goto fnic_abort_cmd_end;
2017 }
2018
2019 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2020
2021 start_time = io_req->start_time;
2022 /*
2023 * firmware completed the abort, check the status,
2024 * free the io_req if successful. If abort fails,
2025 * Device reset will clean the I/O.
2026 */
2027 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS)
2028 CMD_SP(sc) = NULL;
2029 else {
2030 ret = FAILED;
2031 spin_unlock_irqrestore(io_lock, flags);
2032 goto fnic_abort_cmd_end;
2033 }
2034
2035 spin_unlock_irqrestore(io_lock, flags);
2036
2037 fnic_release_ioreq_buf(fnic, io_req, sc);
2038 mempool_free(io_req, fnic->io_req_pool);
2039
2040 if (sc->scsi_done) {
2041 /* Call SCSI completion function to complete the IO */
2042 sc->result = (DID_ABORT << 16);
2043 sc->scsi_done(sc);
2044 atomic64_dec(&fnic_stats->io_stats.active_ios);
2045 if (atomic64_read(&fnic->io_cmpl_skip))
2046 atomic64_dec(&fnic->io_cmpl_skip);
2047 else
2048 atomic64_inc(&fnic_stats->io_stats.io_completions);
2049 }
2050
2051 fnic_abort_cmd_end:
2052 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
2053 sc->request->tag, sc,
2054 jiffies_to_msecs(jiffies - start_time),
2055 0, ((u64)sc->cmnd[0] << 32 |
2056 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2057 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2058 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2059
2060 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2061 "Returning from abort cmd type %x %s\n", task_req,
2062 (ret == SUCCESS) ?
2063 "SUCCESS" : "FAILED");
2064 return ret;
2065 }
2066
fnic_queue_dr_io_req(struct fnic * fnic,struct scsi_cmnd * sc,struct fnic_io_req * io_req)2067 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
2068 struct scsi_cmnd *sc,
2069 struct fnic_io_req *io_req)
2070 {
2071 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
2072 struct Scsi_Host *host = fnic->lport->host;
2073 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
2074 struct scsi_lun fc_lun;
2075 int ret = 0;
2076 unsigned long intr_flags;
2077
2078 spin_lock_irqsave(host->host_lock, intr_flags);
2079 if (unlikely(fnic_chk_state_flags_locked(fnic,
2080 FNIC_FLAGS_IO_BLOCKED))) {
2081 spin_unlock_irqrestore(host->host_lock, intr_flags);
2082 return FAILED;
2083 } else
2084 atomic_inc(&fnic->in_flight);
2085 spin_unlock_irqrestore(host->host_lock, intr_flags);
2086
2087 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
2088
2089 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
2090 free_wq_copy_descs(fnic, wq);
2091
2092 if (!vnic_wq_copy_desc_avail(wq)) {
2093 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2094 "queue_dr_io_req failure - no descriptors\n");
2095 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
2096 ret = -EAGAIN;
2097 goto lr_io_req_end;
2098 }
2099
2100 /* fill in the lun info */
2101 int_to_scsilun(sc->device->lun, &fc_lun);
2102
2103 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
2104 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
2105 fc_lun.scsi_lun, io_req->port_id,
2106 fnic->config.ra_tov, fnic->config.ed_tov);
2107
2108 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
2109 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
2110 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
2111 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
2112 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
2113
2114 lr_io_req_end:
2115 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
2116 atomic_dec(&fnic->in_flight);
2117
2118 return ret;
2119 }
2120
2121 /*
2122 * Clean up any pending aborts on the lun
2123 * For each outstanding IO on this lun, whose abort is not completed by fw,
2124 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2125 * successfully aborted, 1 otherwise
2126 */
fnic_clean_pending_aborts(struct fnic * fnic,struct scsi_cmnd * lr_sc,bool new_sc)2127 static int fnic_clean_pending_aborts(struct fnic *fnic,
2128 struct scsi_cmnd *lr_sc,
2129 bool new_sc)
2130
2131 {
2132 int tag, abt_tag;
2133 struct fnic_io_req *io_req;
2134 spinlock_t *io_lock;
2135 unsigned long flags;
2136 int ret = 0;
2137 struct scsi_cmnd *sc;
2138 struct scsi_lun fc_lun;
2139 struct scsi_device *lun_dev = lr_sc->device;
2140 DECLARE_COMPLETION_ONSTACK(tm_done);
2141 enum fnic_ioreq_state old_ioreq_state;
2142
2143 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2144 io_lock = fnic_io_lock_tag(fnic, tag);
2145 spin_lock_irqsave(io_lock, flags);
2146 sc = scsi_host_find_tag(fnic->lport->host, tag);
2147 /*
2148 * ignore this lun reset cmd if issued using new SC
2149 * or cmds that do not belong to this lun
2150 */
2151 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) {
2152 spin_unlock_irqrestore(io_lock, flags);
2153 continue;
2154 }
2155
2156 io_req = (struct fnic_io_req *)CMD_SP(sc);
2157
2158 if (!io_req || sc->device != lun_dev) {
2159 spin_unlock_irqrestore(io_lock, flags);
2160 continue;
2161 }
2162
2163 /*
2164 * Found IO that is still pending with firmware and
2165 * belongs to the LUN that we are resetting
2166 */
2167 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2168 "Found IO in %s on lun\n",
2169 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2170
2171 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2172 spin_unlock_irqrestore(io_lock, flags);
2173 continue;
2174 }
2175 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2176 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2177 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2178 "%s dev rst not pending sc 0x%p\n", __func__,
2179 sc);
2180 spin_unlock_irqrestore(io_lock, flags);
2181 continue;
2182 }
2183
2184 if (io_req->abts_done)
2185 shost_printk(KERN_ERR, fnic->lport->host,
2186 "%s: io_req->abts_done is set state is %s\n",
2187 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2188 old_ioreq_state = CMD_STATE(sc);
2189 /*
2190 * Any pending IO issued prior to reset is expected to be
2191 * in abts pending state, if not we need to set
2192 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2193 * When IO is completed, the IO will be handed over and
2194 * handled in this function.
2195 */
2196 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2197
2198 BUG_ON(io_req->abts_done);
2199
2200 abt_tag = tag;
2201 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2202 abt_tag |= FNIC_TAG_DEV_RST;
2203 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2204 "%s: dev rst sc 0x%p\n", __func__, sc);
2205 }
2206
2207 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2208 io_req->abts_done = &tm_done;
2209 spin_unlock_irqrestore(io_lock, flags);
2210
2211 /* Now queue the abort command to firmware */
2212 int_to_scsilun(sc->device->lun, &fc_lun);
2213
2214 if (fnic_queue_abort_io_req(fnic, abt_tag,
2215 FCPIO_ITMF_ABT_TASK_TERM,
2216 fc_lun.scsi_lun, io_req)) {
2217 spin_lock_irqsave(io_lock, flags);
2218 io_req = (struct fnic_io_req *)CMD_SP(sc);
2219 if (io_req)
2220 io_req->abts_done = NULL;
2221 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2222 CMD_STATE(sc) = old_ioreq_state;
2223 spin_unlock_irqrestore(io_lock, flags);
2224 ret = 1;
2225 goto clean_pending_aborts_end;
2226 } else {
2227 spin_lock_irqsave(io_lock, flags);
2228 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2229 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2230 spin_unlock_irqrestore(io_lock, flags);
2231 }
2232 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2233
2234 wait_for_completion_timeout(&tm_done,
2235 msecs_to_jiffies
2236 (fnic->config.ed_tov));
2237
2238 /* Recheck cmd state to check if it is now aborted */
2239 spin_lock_irqsave(io_lock, flags);
2240 io_req = (struct fnic_io_req *)CMD_SP(sc);
2241 if (!io_req) {
2242 spin_unlock_irqrestore(io_lock, flags);
2243 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2244 continue;
2245 }
2246
2247 io_req->abts_done = NULL;
2248
2249 /* if abort is still pending with fw, fail */
2250 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2251 spin_unlock_irqrestore(io_lock, flags);
2252 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2253 ret = 1;
2254 goto clean_pending_aborts_end;
2255 }
2256 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2257
2258 /* original sc used for lr is handled by dev reset code */
2259 if (sc != lr_sc)
2260 CMD_SP(sc) = NULL;
2261 spin_unlock_irqrestore(io_lock, flags);
2262
2263 /* original sc used for lr is handled by dev reset code */
2264 if (sc != lr_sc) {
2265 fnic_release_ioreq_buf(fnic, io_req, sc);
2266 mempool_free(io_req, fnic->io_req_pool);
2267 }
2268
2269 /*
2270 * Any IO is returned during reset, it needs to call scsi_done
2271 * to return the scsi_cmnd to upper layer.
2272 */
2273 if (sc->scsi_done) {
2274 /* Set result to let upper SCSI layer retry */
2275 sc->result = DID_RESET << 16;
2276 sc->scsi_done(sc);
2277 }
2278 }
2279
2280 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2281
2282 /* walk again to check, if IOs are still pending in fw */
2283 if (fnic_is_abts_pending(fnic, lr_sc))
2284 ret = FAILED;
2285
2286 clean_pending_aborts_end:
2287 return ret;
2288 }
2289
2290 /**
2291 * fnic_scsi_host_start_tag
2292 * Allocates tagid from host's tag list
2293 **/
2294 static inline int
fnic_scsi_host_start_tag(struct fnic * fnic,struct scsi_cmnd * sc)2295 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2296 {
2297 struct request_queue *q = sc->request->q;
2298 struct request *dummy;
2299
2300 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT);
2301 if (IS_ERR(dummy))
2302 return SCSI_NO_TAG;
2303
2304 sc->tag = sc->request->tag = dummy->tag;
2305 sc->host_scribble = (unsigned char *)dummy;
2306
2307 return dummy->tag;
2308 }
2309
2310 /**
2311 * fnic_scsi_host_end_tag
2312 * frees tag allocated by fnic_scsi_host_start_tag.
2313 **/
2314 static inline void
fnic_scsi_host_end_tag(struct fnic * fnic,struct scsi_cmnd * sc)2315 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2316 {
2317 struct request *dummy = (struct request *)sc->host_scribble;
2318
2319 blk_mq_free_request(dummy);
2320 }
2321
2322 /*
2323 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2324 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2325 * on the LUN.
2326 */
fnic_device_reset(struct scsi_cmnd * sc)2327 int fnic_device_reset(struct scsi_cmnd *sc)
2328 {
2329 struct fc_lport *lp;
2330 struct fnic *fnic;
2331 struct fnic_io_req *io_req = NULL;
2332 struct fc_rport *rport;
2333 int status;
2334 int ret = FAILED;
2335 spinlock_t *io_lock;
2336 unsigned long flags;
2337 unsigned long start_time = 0;
2338 struct scsi_lun fc_lun;
2339 struct fnic_stats *fnic_stats;
2340 struct reset_stats *reset_stats;
2341 int tag = 0;
2342 DECLARE_COMPLETION_ONSTACK(tm_done);
2343 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2344 bool new_sc = 0;
2345
2346 /* Wait for rport to unblock */
2347 fc_block_scsi_eh(sc);
2348
2349 /* Get local-port, check ready and link up */
2350 lp = shost_priv(sc->device->host);
2351
2352 fnic = lport_priv(lp);
2353 fnic_stats = &fnic->fnic_stats;
2354 reset_stats = &fnic->fnic_stats.reset_stats;
2355
2356 atomic64_inc(&reset_stats->device_resets);
2357
2358 rport = starget_to_rport(scsi_target(sc->device));
2359 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2360 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2361 rport->port_id, sc->device->lun, sc);
2362
2363 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2364 goto fnic_device_reset_end;
2365
2366 /* Check if remote port up */
2367 if (fc_remote_port_chkready(rport)) {
2368 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2369 goto fnic_device_reset_end;
2370 }
2371
2372 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2373 /* Allocate tag if not present */
2374
2375 tag = sc->request->tag;
2376 if (unlikely(tag < 0)) {
2377 /*
2378 * Really should fix the midlayer to pass in a proper
2379 * request for ioctls...
2380 */
2381 tag = fnic_scsi_host_start_tag(fnic, sc);
2382 if (unlikely(tag == SCSI_NO_TAG))
2383 goto fnic_device_reset_end;
2384 tag_gen_flag = 1;
2385 new_sc = 1;
2386 }
2387 io_lock = fnic_io_lock_hash(fnic, sc);
2388 spin_lock_irqsave(io_lock, flags);
2389 io_req = (struct fnic_io_req *)CMD_SP(sc);
2390
2391 /*
2392 * If there is a io_req attached to this command, then use it,
2393 * else allocate a new one.
2394 */
2395 if (!io_req) {
2396 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2397 if (!io_req) {
2398 spin_unlock_irqrestore(io_lock, flags);
2399 goto fnic_device_reset_end;
2400 }
2401 memset(io_req, 0, sizeof(*io_req));
2402 io_req->port_id = rport->port_id;
2403 CMD_SP(sc) = (char *)io_req;
2404 }
2405 io_req->dr_done = &tm_done;
2406 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2407 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2408 spin_unlock_irqrestore(io_lock, flags);
2409
2410 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2411
2412 /*
2413 * issue the device reset, if enqueue failed, clean up the ioreq
2414 * and break assoc with scsi cmd
2415 */
2416 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2417 spin_lock_irqsave(io_lock, flags);
2418 io_req = (struct fnic_io_req *)CMD_SP(sc);
2419 if (io_req)
2420 io_req->dr_done = NULL;
2421 goto fnic_device_reset_clean;
2422 }
2423 spin_lock_irqsave(io_lock, flags);
2424 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2425 spin_unlock_irqrestore(io_lock, flags);
2426
2427 /*
2428 * Wait on the local completion for LUN reset. The io_req may be
2429 * freed while we wait since we hold no lock.
2430 */
2431 wait_for_completion_timeout(&tm_done,
2432 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2433
2434 spin_lock_irqsave(io_lock, flags);
2435 io_req = (struct fnic_io_req *)CMD_SP(sc);
2436 if (!io_req) {
2437 spin_unlock_irqrestore(io_lock, flags);
2438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2439 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2440 goto fnic_device_reset_end;
2441 }
2442 io_req->dr_done = NULL;
2443
2444 status = CMD_LR_STATUS(sc);
2445
2446 /*
2447 * If lun reset not completed, bail out with failed. io_req
2448 * gets cleaned up during higher levels of EH
2449 */
2450 if (status == FCPIO_INVALID_CODE) {
2451 atomic64_inc(&reset_stats->device_reset_timeouts);
2452 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2453 "Device reset timed out\n");
2454 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2455 spin_unlock_irqrestore(io_lock, flags);
2456 int_to_scsilun(sc->device->lun, &fc_lun);
2457 /*
2458 * Issue abort and terminate on device reset request.
2459 * If q'ing of terminate fails, retry it after a delay.
2460 */
2461 while (1) {
2462 spin_lock_irqsave(io_lock, flags);
2463 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2464 spin_unlock_irqrestore(io_lock, flags);
2465 break;
2466 }
2467 spin_unlock_irqrestore(io_lock, flags);
2468 if (fnic_queue_abort_io_req(fnic,
2469 tag | FNIC_TAG_DEV_RST,
2470 FCPIO_ITMF_ABT_TASK_TERM,
2471 fc_lun.scsi_lun, io_req)) {
2472 wait_for_completion_timeout(&tm_done,
2473 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2474 } else {
2475 spin_lock_irqsave(io_lock, flags);
2476 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2477 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2478 io_req->abts_done = &tm_done;
2479 spin_unlock_irqrestore(io_lock, flags);
2480 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2481 "Abort and terminate issued on Device reset "
2482 "tag 0x%x sc 0x%p\n", tag, sc);
2483 break;
2484 }
2485 }
2486 while (1) {
2487 spin_lock_irqsave(io_lock, flags);
2488 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2489 spin_unlock_irqrestore(io_lock, flags);
2490 wait_for_completion_timeout(&tm_done,
2491 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2492 break;
2493 } else {
2494 io_req = (struct fnic_io_req *)CMD_SP(sc);
2495 io_req->abts_done = NULL;
2496 goto fnic_device_reset_clean;
2497 }
2498 }
2499 } else {
2500 spin_unlock_irqrestore(io_lock, flags);
2501 }
2502
2503 /* Completed, but not successful, clean up the io_req, return fail */
2504 if (status != FCPIO_SUCCESS) {
2505 spin_lock_irqsave(io_lock, flags);
2506 FNIC_SCSI_DBG(KERN_DEBUG,
2507 fnic->lport->host,
2508 "Device reset completed - failed\n");
2509 io_req = (struct fnic_io_req *)CMD_SP(sc);
2510 goto fnic_device_reset_clean;
2511 }
2512
2513 /*
2514 * Clean up any aborts on this lun that have still not
2515 * completed. If any of these fail, then LUN reset fails.
2516 * clean_pending_aborts cleans all cmds on this lun except
2517 * the lun reset cmd. If all cmds get cleaned, the lun reset
2518 * succeeds
2519 */
2520 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
2521 spin_lock_irqsave(io_lock, flags);
2522 io_req = (struct fnic_io_req *)CMD_SP(sc);
2523 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2524 "Device reset failed"
2525 " since could not abort all IOs\n");
2526 goto fnic_device_reset_clean;
2527 }
2528
2529 /* Clean lun reset command */
2530 spin_lock_irqsave(io_lock, flags);
2531 io_req = (struct fnic_io_req *)CMD_SP(sc);
2532 if (io_req)
2533 /* Completed, and successful */
2534 ret = SUCCESS;
2535
2536 fnic_device_reset_clean:
2537 if (io_req)
2538 CMD_SP(sc) = NULL;
2539
2540 spin_unlock_irqrestore(io_lock, flags);
2541
2542 if (io_req) {
2543 start_time = io_req->start_time;
2544 fnic_release_ioreq_buf(fnic, io_req, sc);
2545 mempool_free(io_req, fnic->io_req_pool);
2546 }
2547
2548 fnic_device_reset_end:
2549 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2550 sc->request->tag, sc,
2551 jiffies_to_msecs(jiffies - start_time),
2552 0, ((u64)sc->cmnd[0] << 32 |
2553 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2554 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2555 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2556
2557 /* free tag if it is allocated */
2558 if (unlikely(tag_gen_flag))
2559 fnic_scsi_host_end_tag(fnic, sc);
2560
2561 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2562 "Returning from device reset %s\n",
2563 (ret == SUCCESS) ?
2564 "SUCCESS" : "FAILED");
2565
2566 if (ret == FAILED)
2567 atomic64_inc(&reset_stats->device_reset_failures);
2568
2569 return ret;
2570 }
2571
2572 /* Clean up all IOs, clean up libFC local port */
fnic_reset(struct Scsi_Host * shost)2573 int fnic_reset(struct Scsi_Host *shost)
2574 {
2575 struct fc_lport *lp;
2576 struct fnic *fnic;
2577 int ret = 0;
2578 struct reset_stats *reset_stats;
2579
2580 lp = shost_priv(shost);
2581 fnic = lport_priv(lp);
2582 reset_stats = &fnic->fnic_stats.reset_stats;
2583
2584 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2585 "fnic_reset called\n");
2586
2587 atomic64_inc(&reset_stats->fnic_resets);
2588
2589 /*
2590 * Reset local port, this will clean up libFC exchanges,
2591 * reset remote port sessions, and if link is up, begin flogi
2592 */
2593 ret = fc_lport_reset(lp);
2594
2595 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2596 "Returning from fnic reset %s\n",
2597 (ret == 0) ?
2598 "SUCCESS" : "FAILED");
2599
2600 if (ret == 0)
2601 atomic64_inc(&reset_stats->fnic_reset_completions);
2602 else
2603 atomic64_inc(&reset_stats->fnic_reset_failures);
2604
2605 return ret;
2606 }
2607
2608 /*
2609 * SCSI Error handling calls driver's eh_host_reset if all prior
2610 * error handling levels return FAILED. If host reset completes
2611 * successfully, and if link is up, then Fabric login begins.
2612 *
2613 * Host Reset is the highest level of error recovery. If this fails, then
2614 * host is offlined by SCSI.
2615 *
2616 */
fnic_host_reset(struct scsi_cmnd * sc)2617 int fnic_host_reset(struct scsi_cmnd *sc)
2618 {
2619 int ret;
2620 unsigned long wait_host_tmo;
2621 struct Scsi_Host *shost = sc->device->host;
2622 struct fc_lport *lp = shost_priv(shost);
2623 struct fnic *fnic = lport_priv(lp);
2624 unsigned long flags;
2625
2626 spin_lock_irqsave(&fnic->fnic_lock, flags);
2627 if (!fnic->internal_reset_inprogress) {
2628 fnic->internal_reset_inprogress = true;
2629 } else {
2630 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2631 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2632 "host reset in progress skipping another host reset\n");
2633 return SUCCESS;
2634 }
2635 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2636
2637 /*
2638 * If fnic_reset is successful, wait for fabric login to complete
2639 * scsi-ml tries to send a TUR to every device if host reset is
2640 * successful, so before returning to scsi, fabric should be up
2641 */
2642 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2643 if (ret == SUCCESS) {
2644 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2645 ret = FAILED;
2646 while (time_before(jiffies, wait_host_tmo)) {
2647 if ((lp->state == LPORT_ST_READY) &&
2648 (lp->link_up)) {
2649 ret = SUCCESS;
2650 break;
2651 }
2652 ssleep(1);
2653 }
2654 }
2655
2656 spin_lock_irqsave(&fnic->fnic_lock, flags);
2657 fnic->internal_reset_inprogress = false;
2658 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2659 return ret;
2660 }
2661
2662 /*
2663 * This fxn is called from libFC when host is removed
2664 */
fnic_scsi_abort_io(struct fc_lport * lp)2665 void fnic_scsi_abort_io(struct fc_lport *lp)
2666 {
2667 int err = 0;
2668 unsigned long flags;
2669 enum fnic_state old_state;
2670 struct fnic *fnic = lport_priv(lp);
2671 DECLARE_COMPLETION_ONSTACK(remove_wait);
2672
2673 /* Issue firmware reset for fnic, wait for reset to complete */
2674 retry_fw_reset:
2675 spin_lock_irqsave(&fnic->fnic_lock, flags);
2676 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2677 /* fw reset is in progress, poll for its completion */
2678 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2679 schedule_timeout(msecs_to_jiffies(100));
2680 goto retry_fw_reset;
2681 }
2682
2683 fnic->remove_wait = &remove_wait;
2684 old_state = fnic->state;
2685 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2686 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2687 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2688
2689 err = fnic_fw_reset_handler(fnic);
2690 if (err) {
2691 spin_lock_irqsave(&fnic->fnic_lock, flags);
2692 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2693 fnic->state = old_state;
2694 fnic->remove_wait = NULL;
2695 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2696 return;
2697 }
2698
2699 /* Wait for firmware reset to complete */
2700 wait_for_completion_timeout(&remove_wait,
2701 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2702
2703 spin_lock_irqsave(&fnic->fnic_lock, flags);
2704 fnic->remove_wait = NULL;
2705 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2706 "fnic_scsi_abort_io %s\n",
2707 (fnic->state == FNIC_IN_ETH_MODE) ?
2708 "SUCCESS" : "FAILED");
2709 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2710
2711 }
2712
2713 /*
2714 * This fxn called from libFC to clean up driver IO state on link down
2715 */
fnic_scsi_cleanup(struct fc_lport * lp)2716 void fnic_scsi_cleanup(struct fc_lport *lp)
2717 {
2718 unsigned long flags;
2719 enum fnic_state old_state;
2720 struct fnic *fnic = lport_priv(lp);
2721
2722 /* issue fw reset */
2723 retry_fw_reset:
2724 spin_lock_irqsave(&fnic->fnic_lock, flags);
2725 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2726 /* fw reset is in progress, poll for its completion */
2727 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2728 schedule_timeout(msecs_to_jiffies(100));
2729 goto retry_fw_reset;
2730 }
2731 old_state = fnic->state;
2732 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2733 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2734 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2735
2736 if (fnic_fw_reset_handler(fnic)) {
2737 spin_lock_irqsave(&fnic->fnic_lock, flags);
2738 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2739 fnic->state = old_state;
2740 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2741 }
2742
2743 }
2744
fnic_empty_scsi_cleanup(struct fc_lport * lp)2745 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2746 {
2747 }
2748
fnic_exch_mgr_reset(struct fc_lport * lp,u32 sid,u32 did)2749 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2750 {
2751 struct fnic *fnic = lport_priv(lp);
2752
2753 /* Non-zero sid, nothing to do */
2754 if (sid)
2755 goto call_fc_exch_mgr_reset;
2756
2757 if (did) {
2758 fnic_rport_exch_reset(fnic, did);
2759 goto call_fc_exch_mgr_reset;
2760 }
2761
2762 /*
2763 * sid = 0, did = 0
2764 * link down or device being removed
2765 */
2766 if (!fnic->in_remove)
2767 fnic_scsi_cleanup(lp);
2768 else
2769 fnic_scsi_abort_io(lp);
2770
2771 /* call libFC exch mgr reset to reset its exchanges */
2772 call_fc_exch_mgr_reset:
2773 fc_exch_mgr_reset(lp, sid, did);
2774
2775 }
2776
2777 /*
2778 * fnic_is_abts_pending() is a helper function that
2779 * walks through tag map to check if there is any IOs pending,if there is one,
2780 * then it returns 1 (true), otherwise 0 (false)
2781 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2782 * otherwise, it checks for all IOs.
2783 */
fnic_is_abts_pending(struct fnic * fnic,struct scsi_cmnd * lr_sc)2784 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2785 {
2786 int tag;
2787 struct fnic_io_req *io_req;
2788 spinlock_t *io_lock;
2789 unsigned long flags;
2790 int ret = 0;
2791 struct scsi_cmnd *sc;
2792 struct scsi_device *lun_dev = NULL;
2793
2794 if (lr_sc)
2795 lun_dev = lr_sc->device;
2796
2797 /* walk again to check, if IOs are still pending in fw */
2798 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2799 sc = scsi_host_find_tag(fnic->lport->host, tag);
2800 /*
2801 * ignore this lun reset cmd or cmds that do not belong to
2802 * this lun
2803 */
2804 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2805 continue;
2806
2807 io_lock = fnic_io_lock_hash(fnic, sc);
2808 spin_lock_irqsave(io_lock, flags);
2809
2810 io_req = (struct fnic_io_req *)CMD_SP(sc);
2811
2812 if (!io_req || sc->device != lun_dev) {
2813 spin_unlock_irqrestore(io_lock, flags);
2814 continue;
2815 }
2816
2817 /*
2818 * Found IO that is still pending with firmware and
2819 * belongs to the LUN that we are resetting
2820 */
2821 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2822 "Found IO in %s on lun\n",
2823 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2824
2825 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2826 ret = 1;
2827 spin_unlock_irqrestore(io_lock, flags);
2828 }
2829
2830 return ret;
2831 }
2832