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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_scsi.c
blob266b909fe854459ddde4809eef4c06b1b0582869
1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18 #include <linux/mempool.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/workqueue.h>
22 #include <linux/pci.h>
23 #include <linux/scatterlist.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/delay.h>
29 #include <linux/gfp.h>
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/fc/fc_els.h>
36 #include <scsi/fc/fc_fcoe.h>
37 #include <scsi/libfc.h>
38 #include <scsi/fc_frame.h>
39 #include "fnic_io.h"
40 #include "fnic.h"
41
42 const char *fnic_state_str[] = {
43 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
44 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
45 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
46 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
47 };
48
49 static const char *fnic_ioreq_state_str[] = {
50 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
51 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
52 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
53 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
54 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
55 };
56
57 static const char *fcpio_status_str[] = {
58 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
59 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
60 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
61 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
62 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
63 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
64 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
65 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
66 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
67 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
68 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
69 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
70 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
71 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
72 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
73 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
74 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
75 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
76 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
77 };
78
79 const char *fnic_state_to_str(unsigned int state)
80 {
81 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
82 return "unknown";
83
84 return fnic_state_str[state];
85 }
86
87 static const char *fnic_ioreq_state_to_str(unsigned int state)
88 {
89 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
90 !fnic_ioreq_state_str[state])
91 return "unknown";
92
93 return fnic_ioreq_state_str[state];
94 }
95
96 static const char *fnic_fcpio_status_to_str(unsigned int status)
97 {
98 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
99 return "unknown";
100
101 return fcpio_status_str[status];
102 }
103
104 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
105
106 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
107 struct scsi_cmnd *sc)
108 {
109 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
110
111 return &fnic->io_req_lock[hash];
112 }
113
114 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
115 int tag)
116 {
117 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
118 }
119
120 /*
121 * Unmap the data buffer and sense buffer for an io_req,
122 * also unmap and free the device-private scatter/gather list.
123 */
124 static void fnic_release_ioreq_buf(struct fnic *fnic,
125 struct fnic_io_req *io_req,
126 struct scsi_cmnd *sc)
127 {
128 if (io_req->sgl_list_pa)
129 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
131 PCI_DMA_TODEVICE);
132 scsi_dma_unmap(sc);
133
134 if (io_req->sgl_cnt)
135 mempool_free(io_req->sgl_list_alloc,
136 fnic->io_sgl_pool[io_req->sgl_type]);
137 if (io_req->sense_buf_pa)
138 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
139 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
140 }
141
142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
143 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
144 {
145 /* if no Ack received from firmware, then nothing to clean */
146 if (!fnic->fw_ack_recd[0])
147 return 1;
148
149 /*
150 * Update desc_available count based on number of freed descriptors
151 * Account for wraparound
152 */
153 if (wq->to_clean_index <= fnic->fw_ack_index[0])
154 wq->ring.desc_avail += (fnic->fw_ack_index[0]
155 - wq->to_clean_index + 1);
156 else
157 wq->ring.desc_avail += (wq->ring.desc_count
158 - wq->to_clean_index
159 + fnic->fw_ack_index[0] + 1);
160
161 /*
162 * just bump clean index to ack_index+1 accounting for wraparound
163 * this will essentially free up all descriptors between
164 * to_clean_index and fw_ack_index, both inclusive
165 */
166 wq->to_clean_index =
167 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
168
169 /* we have processed the acks received so far */
170 fnic->fw_ack_recd[0] = 0;
171 return 0;
172 }
173
174
175 /**
176 * __fnic_set_state_flags
177 * Sets/Clears bits in fnic's state_flags
178 **/
179 void
180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
181 unsigned long clearbits)
182 {
183 struct Scsi_Host *host = fnic->lport->host;
184 int sh_locked = spin_is_locked(host->host_lock);
185 unsigned long flags = 0;
186
187 if (!sh_locked)
188 spin_lock_irqsave(host->host_lock, flags);
189
190 if (clearbits)
191 fnic->state_flags &= ~st_flags;
192 else
193 fnic->state_flags |= st_flags;
194
195 if (!sh_locked)
196 spin_unlock_irqrestore(host->host_lock, flags);
197
198 return;
199 }
200
201
202 /*
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
205 */
206 int fnic_fw_reset_handler(struct fnic *fnic)
207 {
208 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
209 int ret = 0;
210 unsigned long flags;
211
212 /* indicate fwreset to io path */
213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
214
215 skb_queue_purge(&fnic->frame_queue);
216 skb_queue_purge(&fnic->tx_queue);
217
218 /* wait for io cmpl */
219 while (atomic_read(&fnic->in_flight))
220 schedule_timeout(msecs_to_jiffies(1));
221
222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
223
224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
225 free_wq_copy_descs(fnic, wq);
226
227 if (!vnic_wq_copy_desc_avail(wq))
228 ret = -EAGAIN;
229 else {
230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
235 atomic64_read(
236 &fnic->fnic_stats.fw_stats.active_fw_reqs));
237 }
238
239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
240
241 if (!ret) {
242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
244 "Issued fw reset\n");
245 } else {
246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
248 "Failed to issue fw reset\n");
249 }
250
251 return ret;
252 }
253
254
255 /*
256 * fnic_flogi_reg_handler
257 * Routine to send flogi register msg to fw
258 */
259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
260 {
261 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
262 enum fcpio_flogi_reg_format_type format;
263 struct fc_lport *lp = fnic->lport;
264 u8 gw_mac[ETH_ALEN];
265 int ret = 0;
266 unsigned long flags;
267
268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
269
270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
271 free_wq_copy_descs(fnic, wq);
272
273 if (!vnic_wq_copy_desc_avail(wq)) {
274 ret = -EAGAIN;
275 goto flogi_reg_ioreq_end;
276 }
277
278 if (fnic->ctlr.map_dest) {
279 memset(gw_mac, 0xff, ETH_ALEN);
280 format = FCPIO_FLOGI_REG_DEF_DEST;
281 } else {
282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
283 format = FCPIO_FLOGI_REG_GW_DEST;
284 }
285
286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
288 fc_id, gw_mac,
289 fnic->data_src_addr,
290 lp->r_a_tov, lp->e_d_tov);
291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
293 fc_id, fnic->data_src_addr, gw_mac);
294 } else {
295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
296 format, fc_id, gw_mac);
297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
298 "FLOGI reg issued fcid %x map %d dest %pM\n",
299 fc_id, fnic->ctlr.map_dest, gw_mac);
300 }
301
302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
307
308 flogi_reg_ioreq_end:
309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
310 return ret;
311 }
312
313 /*
314 * fnic_queue_wq_copy_desc
315 * Routine to enqueue a wq copy desc
316 */
317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
318 struct vnic_wq_copy *wq,
319 struct fnic_io_req *io_req,
320 struct scsi_cmnd *sc,
321 int sg_count)
322 {
323 struct scatterlist *sg;
324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
325 struct fc_rport_libfc_priv *rp = rport->dd_data;
326 struct host_sg_desc *desc;
327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
328 unsigned int i;
329 unsigned long intr_flags;
330 int flags;
331 u8 exch_flags;
332 struct scsi_lun fc_lun;
333 int r;
334
335 if (sg_count) {
336 /* For each SGE, create a device desc entry */
337 desc = io_req->sgl_list;
338 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
339 desc->addr = cpu_to_le64(sg_dma_address(sg));
340 desc->len = cpu_to_le32(sg_dma_len(sg));
341 desc->_resvd = 0;
342 desc++;
343 }
344
345 io_req->sgl_list_pa = pci_map_single
346 (fnic->pdev,
347 io_req->sgl_list,
348 sizeof(io_req->sgl_list[0]) * sg_count,
349 PCI_DMA_TODEVICE);
350
351 r = pci_dma_mapping_error(fnic->pdev, io_req->sgl_list_pa);
352 if (r) {
353 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
354 return SCSI_MLQUEUE_HOST_BUSY;
355 }
356 }
357
358 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
359 sc->sense_buffer,
360 SCSI_SENSE_BUFFERSIZE,
361 PCI_DMA_FROMDEVICE);
362
363 r = pci_dma_mapping_error(fnic->pdev, io_req->sense_buf_pa);
364 if (r) {
365 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
366 sizeof(io_req->sgl_list[0]) * sg_count,
367 PCI_DMA_TODEVICE);
368 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
369 return SCSI_MLQUEUE_HOST_BUSY;
370 }
371
372 int_to_scsilun(sc->device->lun, &fc_lun);
373
374 /* Enqueue the descriptor in the Copy WQ */
375 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
376
377 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
378 free_wq_copy_descs(fnic, wq);
379
380 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
381 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
382 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
383 "fnic_queue_wq_copy_desc failure - no descriptors\n");
384 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
385 return SCSI_MLQUEUE_HOST_BUSY;
386 }
387
388 flags = 0;
389 if (sc->sc_data_direction == DMA_FROM_DEVICE)
390 flags = FCPIO_ICMND_RDDATA;
391 else if (sc->sc_data_direction == DMA_TO_DEVICE)
392 flags = FCPIO_ICMND_WRDATA;
393
394 exch_flags = 0;
395 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
396 (rp->flags & FC_RP_FLAGS_RETRY))
397 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
398
399 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
400 0, exch_flags, io_req->sgl_cnt,
401 SCSI_SENSE_BUFFERSIZE,
402 io_req->sgl_list_pa,
403 io_req->sense_buf_pa,
404 0, /* scsi cmd ref, always 0 */
405 FCPIO_ICMND_PTA_SIMPLE,
406 /* scsi pri and tag */
407 flags, /* command flags */
408 sc->cmnd, sc->cmd_len,
409 scsi_bufflen(sc),
410 fc_lun.scsi_lun, io_req->port_id,
411 rport->maxframe_size, rp->r_a_tov,
412 rp->e_d_tov);
413
414 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
415 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
416 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
417 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
418 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
419
420 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
421 return 0;
422 }
423
424 /*
425 * fnic_queuecommand
426 * Routine to send a scsi cdb
427 * Called with host_lock held and interrupts disabled.
428 */
429 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
430 {
431 struct fc_lport *lp = shost_priv(sc->device->host);
432 struct fc_rport *rport;
433 struct fnic_io_req *io_req = NULL;
434 struct fnic *fnic = lport_priv(lp);
435 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
436 struct vnic_wq_copy *wq;
437 int ret;
438 u64 cmd_trace;
439 int sg_count = 0;
440 unsigned long flags = 0;
441 unsigned long ptr;
442 struct fc_rport_priv *rdata;
443 spinlock_t *io_lock = NULL;
444 int io_lock_acquired = 0;
445
446 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
447 return SCSI_MLQUEUE_HOST_BUSY;
448
449 rport = starget_to_rport(scsi_target(sc->device));
450 ret = fc_remote_port_chkready(rport);
451 if (ret) {
452 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
453 sc->result = ret;
454 done(sc);
455 return 0;
456 }
457
458 rdata = lp->tt.rport_lookup(lp, rport->port_id);
459 if (!rdata || (rdata->rp_state == RPORT_ST_DELETE)) {
460 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
461 "returning IO as rport is removed\n");
462 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
463 sc->result = DID_NO_CONNECT;
464 done(sc);
465 return 0;
466 }
467
468 if (lp->state != LPORT_ST_READY || !(lp->link_up))
469 return SCSI_MLQUEUE_HOST_BUSY;
470
471 atomic_inc(&fnic->in_flight);
472
473 /*
474 * Release host lock, use driver resource specific locks from here.
475 * Don't re-enable interrupts in case they were disabled prior to the
476 * caller disabling them.
477 */
478 spin_unlock(lp->host->host_lock);
479 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
480 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
481
482 /* Get a new io_req for this SCSI IO */
483 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
484 if (!io_req) {
485 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
486 ret = SCSI_MLQUEUE_HOST_BUSY;
487 goto out;
488 }
489 memset(io_req, 0, sizeof(*io_req));
490
491 /* Map the data buffer */
492 sg_count = scsi_dma_map(sc);
493 if (sg_count < 0) {
494 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
495 sc->request->tag, sc, 0, sc->cmnd[0],
496 sg_count, CMD_STATE(sc));
497 mempool_free(io_req, fnic->io_req_pool);
498 goto out;
499 }
500
501 /* Determine the type of scatter/gather list we need */
502 io_req->sgl_cnt = sg_count;
503 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
504 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
505 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
506
507 if (sg_count) {
508 io_req->sgl_list =
509 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
510 GFP_ATOMIC);
511 if (!io_req->sgl_list) {
512 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
513 ret = SCSI_MLQUEUE_HOST_BUSY;
514 scsi_dma_unmap(sc);
515 mempool_free(io_req, fnic->io_req_pool);
516 goto out;
517 }
518
519 /* Cache sgl list allocated address before alignment */
520 io_req->sgl_list_alloc = io_req->sgl_list;
521 ptr = (unsigned long) io_req->sgl_list;
522 if (ptr % FNIC_SG_DESC_ALIGN) {
523 io_req->sgl_list = (struct host_sg_desc *)
524 (((unsigned long) ptr
525 + FNIC_SG_DESC_ALIGN - 1)
526 & ~(FNIC_SG_DESC_ALIGN - 1));
527 }
528 }
529
530 /*
531 * Will acquire lock defore setting to IO initialized.
532 */
533
534 io_lock = fnic_io_lock_hash(fnic, sc);
535 spin_lock_irqsave(io_lock, flags);
536
537 /* initialize rest of io_req */
538 io_lock_acquired = 1;
539 io_req->port_id = rport->port_id;
540 io_req->start_time = jiffies;
541 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
542 CMD_SP(sc) = (char *)io_req;
543 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
544 sc->scsi_done = done;
545
546 /* create copy wq desc and enqueue it */
547 wq = &fnic->wq_copy[0];
548 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
549 if (ret) {
550 /*
551 * In case another thread cancelled the request,
552 * refetch the pointer under the lock.
553 */
554 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
555 sc->request->tag, sc, 0, 0, 0,
556 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
557 io_req = (struct fnic_io_req *)CMD_SP(sc);
558 CMD_SP(sc) = NULL;
559 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
560 spin_unlock_irqrestore(io_lock, flags);
561 if (io_req) {
562 fnic_release_ioreq_buf(fnic, io_req, sc);
563 mempool_free(io_req, fnic->io_req_pool);
564 }
565 atomic_dec(&fnic->in_flight);
566 /* acquire host lock before returning to SCSI */
567 spin_lock(lp->host->host_lock);
568 return ret;
569 } else {
570 atomic64_inc(&fnic_stats->io_stats.active_ios);
571 atomic64_inc(&fnic_stats->io_stats.num_ios);
572 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
573 atomic64_read(&fnic_stats->io_stats.max_active_ios))
574 atomic64_set(&fnic_stats->io_stats.max_active_ios,
575 atomic64_read(&fnic_stats->io_stats.active_ios));
576
577 /* REVISIT: Use per IO lock in the final code */
578 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
579 }
580 out:
581 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
582 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
583 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
584 sc->cmnd[5]);
585
586 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
587 sc->request->tag, sc, io_req,
588 sg_count, cmd_trace,
589 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
590
591 /* if only we issued IO, will we have the io lock */
592 if (io_lock_acquired)
593 spin_unlock_irqrestore(io_lock, flags);
594
595 atomic_dec(&fnic->in_flight);
596 /* acquire host lock before returning to SCSI */
597 spin_lock(lp->host->host_lock);
598 return ret;
599 }
600
601 DEF_SCSI_QCMD(fnic_queuecommand)
602
603 /*
604 * fnic_fcpio_fw_reset_cmpl_handler
605 * Routine to handle fw reset completion
606 */
607 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
608 struct fcpio_fw_req *desc)
609 {
610 u8 type;
611 u8 hdr_status;
612 struct fcpio_tag tag;
613 int ret = 0;
614 unsigned long flags;
615 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
616
617 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
618
619 atomic64_inc(&reset_stats->fw_reset_completions);
620
621 /* Clean up all outstanding io requests */
622 fnic_cleanup_io(fnic, SCSI_NO_TAG);
623
624 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
625 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
626
627 spin_lock_irqsave(&fnic->fnic_lock, flags);
628
629 /* fnic should be in FC_TRANS_ETH_MODE */
630 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
631 /* Check status of reset completion */
632 if (!hdr_status) {
633 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
634 "reset cmpl success\n");
635 /* Ready to send flogi out */
636 fnic->state = FNIC_IN_ETH_MODE;
637 } else {
638 FNIC_SCSI_DBG(KERN_DEBUG,
639 fnic->lport->host,
640 "fnic fw_reset : failed %s\n",
641 fnic_fcpio_status_to_str(hdr_status));
642
643 /*
644 * Unable to change to eth mode, cannot send out flogi
645 * Change state to fc mode, so that subsequent Flogi
646 * requests from libFC will cause more attempts to
647 * reset the firmware. Free the cached flogi
648 */
649 fnic->state = FNIC_IN_FC_MODE;
650 atomic64_inc(&reset_stats->fw_reset_failures);
651 ret = -1;
652 }
653 } else {
654 FNIC_SCSI_DBG(KERN_DEBUG,
655 fnic->lport->host,
656 "Unexpected state %s while processing"
657 " reset cmpl\n", fnic_state_to_str(fnic->state));
658 atomic64_inc(&reset_stats->fw_reset_failures);
659 ret = -1;
660 }
661
662 /* Thread removing device blocks till firmware reset is complete */
663 if (fnic->remove_wait)
664 complete(fnic->remove_wait);
665
666 /*
667 * If fnic is being removed, or fw reset failed
668 * free the flogi frame. Else, send it out
669 */
670 if (fnic->remove_wait || ret) {
671 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
672 skb_queue_purge(&fnic->tx_queue);
673 goto reset_cmpl_handler_end;
674 }
675
676 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
677
678 fnic_flush_tx(fnic);
679
680 reset_cmpl_handler_end:
681 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
682
683 return ret;
684 }
685
686 /*
687 * fnic_fcpio_flogi_reg_cmpl_handler
688 * Routine to handle flogi register completion
689 */
690 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
691 struct fcpio_fw_req *desc)
692 {
693 u8 type;
694 u8 hdr_status;
695 struct fcpio_tag tag;
696 int ret = 0;
697 unsigned long flags;
698
699 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
700
701 /* Update fnic state based on status of flogi reg completion */
702 spin_lock_irqsave(&fnic->fnic_lock, flags);
703
704 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
705
706 /* Check flogi registration completion status */
707 if (!hdr_status) {
708 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
709 "flog reg succeeded\n");
710 fnic->state = FNIC_IN_FC_MODE;
711 } else {
712 FNIC_SCSI_DBG(KERN_DEBUG,
713 fnic->lport->host,
714 "fnic flogi reg :failed %s\n",
715 fnic_fcpio_status_to_str(hdr_status));
716 fnic->state = FNIC_IN_ETH_MODE;
717 ret = -1;
718 }
719 } else {
720 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
721 "Unexpected fnic state %s while"
722 " processing flogi reg completion\n",
723 fnic_state_to_str(fnic->state));
724 ret = -1;
725 }
726
727 if (!ret) {
728 if (fnic->stop_rx_link_events) {
729 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
730 goto reg_cmpl_handler_end;
731 }
732 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
733
734 fnic_flush_tx(fnic);
735 queue_work(fnic_event_queue, &fnic->frame_work);
736 } else {
737 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
738 }
739
740 reg_cmpl_handler_end:
741 return ret;
742 }
743
744 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
745 u16 request_out)
746 {
747 if (wq->to_clean_index <= wq->to_use_index) {
748 /* out of range, stale request_out index */
749 if (request_out < wq->to_clean_index ||
750 request_out >= wq->to_use_index)
751 return 0;
752 } else {
753 /* out of range, stale request_out index */
754 if (request_out < wq->to_clean_index &&
755 request_out >= wq->to_use_index)
756 return 0;
757 }
758 /* request_out index is in range */
759 return 1;
760 }
761
762
763 /*
764 * Mark that ack received and store the Ack index. If there are multiple
765 * acks received before Tx thread cleans it up, the latest value will be
766 * used which is correct behavior. This state should be in the copy Wq
767 * instead of in the fnic
768 */
769 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
770 unsigned int cq_index,
771 struct fcpio_fw_req *desc)
772 {
773 struct vnic_wq_copy *wq;
774 u16 request_out = desc->u.ack.request_out;
775 unsigned long flags;
776 u64 *ox_id_tag = (u64 *)(void *)desc;
777
778 /* mark the ack state */
779 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
780 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
781
782 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
783 if (is_ack_index_in_range(wq, request_out)) {
784 fnic->fw_ack_index[0] = request_out;
785 fnic->fw_ack_recd[0] = 1;
786 } else
787 atomic64_inc(
788 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
789
790 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
791 FNIC_TRACE(fnic_fcpio_ack_handler,
792 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
793 ox_id_tag[4], ox_id_tag[5]);
794 }
795
796 /*
797 * fnic_fcpio_icmnd_cmpl_handler
798 * Routine to handle icmnd completions
799 */
800 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
801 struct fcpio_fw_req *desc)
802 {
803 u8 type;
804 u8 hdr_status;
805 struct fcpio_tag tag;
806 u32 id;
807 u64 xfer_len = 0;
808 struct fcpio_icmnd_cmpl *icmnd_cmpl;
809 struct fnic_io_req *io_req;
810 struct scsi_cmnd *sc;
811 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
812 unsigned long flags;
813 spinlock_t *io_lock;
814 u64 cmd_trace;
815 unsigned long start_time;
816
817 /* Decode the cmpl description to get the io_req id */
818 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
819 fcpio_tag_id_dec(&tag, &id);
820 icmnd_cmpl = &desc->u.icmnd_cmpl;
821
822 if (id >= fnic->fnic_max_tag_id) {
823 shost_printk(KERN_ERR, fnic->lport->host,
824 "Tag out of range tag %x hdr status = %s\n",
825 id, fnic_fcpio_status_to_str(hdr_status));
826 return;
827 }
828
829 sc = scsi_host_find_tag(fnic->lport->host, id);
830 WARN_ON_ONCE(!sc);
831 if (!sc) {
832 atomic64_inc(&fnic_stats->io_stats.sc_null);
833 shost_printk(KERN_ERR, fnic->lport->host,
834 "icmnd_cmpl sc is null - "
835 "hdr status = %s tag = 0x%x desc = 0x%p\n",
836 fnic_fcpio_status_to_str(hdr_status), id, desc);
837 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
838 fnic->lport->host->host_no, id,
839 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
840 (u64)icmnd_cmpl->_resvd0[0]),
841 ((u64)hdr_status << 16 |
842 (u64)icmnd_cmpl->scsi_status << 8 |
843 (u64)icmnd_cmpl->flags), desc,
844 (u64)icmnd_cmpl->residual, 0);
845 return;
846 }
847
848 io_lock = fnic_io_lock_hash(fnic, sc);
849 spin_lock_irqsave(io_lock, flags);
850 io_req = (struct fnic_io_req *)CMD_SP(sc);
851 WARN_ON_ONCE(!io_req);
852 if (!io_req) {
853 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
854 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
855 spin_unlock_irqrestore(io_lock, flags);
856 shost_printk(KERN_ERR, fnic->lport->host,
857 "icmnd_cmpl io_req is null - "
858 "hdr status = %s tag = 0x%x sc 0x%p\n",
859 fnic_fcpio_status_to_str(hdr_status), id, sc);
860 return;
861 }
862 start_time = io_req->start_time;
863
864 /* firmware completed the io */
865 io_req->io_completed = 1;
866
867 /*
868 * if SCSI-ML has already issued abort on this command,
869 * ignore completion of the IO. The abts path will clean it up
870 */
871 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
872 spin_unlock_irqrestore(io_lock, flags);
873 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
874 switch (hdr_status) {
875 case FCPIO_SUCCESS:
876 CMD_FLAGS(sc) |= FNIC_IO_DONE;
877 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
878 "icmnd_cmpl ABTS pending hdr status = %s "
879 "sc 0x%p scsi_status %x residual %d\n",
880 fnic_fcpio_status_to_str(hdr_status), sc,
881 icmnd_cmpl->scsi_status,
882 icmnd_cmpl->residual);
883 break;
884 case FCPIO_ABORTED:
885 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
886 break;
887 default:
888 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
889 "icmnd_cmpl abts pending "
890 "hdr status = %s tag = 0x%x sc = 0x%p\n",
891 fnic_fcpio_status_to_str(hdr_status),
892 id, sc);
893 break;
894 }
895 return;
896 }
897
898 /* Mark the IO as complete */
899 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
900
901 icmnd_cmpl = &desc->u.icmnd_cmpl;
902
903 switch (hdr_status) {
904 case FCPIO_SUCCESS:
905 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
906 xfer_len = scsi_bufflen(sc);
907 scsi_set_resid(sc, icmnd_cmpl->residual);
908
909 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
910 xfer_len -= icmnd_cmpl->residual;
911
912 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
913 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
914 break;
915
916 case FCPIO_TIMEOUT: /* request was timed out */
917 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
918 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
919 break;
920
921 case FCPIO_ABORTED: /* request was aborted */
922 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
923 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
924 break;
925
926 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
927 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
928 scsi_set_resid(sc, icmnd_cmpl->residual);
929 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
930 break;
931
932 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
933 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
934 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
935 break;
936
937 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
938 atomic64_inc(&fnic_stats->io_stats.io_not_found);
939 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
940 break;
941
942 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
943 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
944 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
945 break;
946
947 case FCPIO_FW_ERR: /* request was terminated due fw error */
948 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
949 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
950 break;
951
952 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
953 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
954 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
955 break;
956
957 case FCPIO_INVALID_HEADER: /* header contains invalid data */
958 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
959 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
960 default:
961 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
962 fnic_fcpio_status_to_str(hdr_status));
963 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
964 break;
965 }
966
967 if (hdr_status != FCPIO_SUCCESS) {
968 atomic64_inc(&fnic_stats->io_stats.io_failures);
969 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
970 fnic_fcpio_status_to_str(hdr_status));
971 }
972 /* Break link with the SCSI command */
973 CMD_SP(sc) = NULL;
974 CMD_FLAGS(sc) |= FNIC_IO_DONE;
975
976 spin_unlock_irqrestore(io_lock, flags);
977
978 fnic_release_ioreq_buf(fnic, io_req, sc);
979
980 mempool_free(io_req, fnic->io_req_pool);
981
982 cmd_trace = ((u64)hdr_status << 56) |
983 (u64)icmnd_cmpl->scsi_status << 48 |
984 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
985 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
986 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
987
988 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
989 sc->device->host->host_no, id, sc,
990 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
991 (u64)icmnd_cmpl->_resvd0[0] << 48 |
992 jiffies_to_msecs(jiffies - start_time)),
993 desc, cmd_trace,
994 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
995
996 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
997 fnic->lport->host_stats.fcp_input_requests++;
998 fnic->fcp_input_bytes += xfer_len;
999 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1000 fnic->lport->host_stats.fcp_output_requests++;
1001 fnic->fcp_output_bytes += xfer_len;
1002 } else
1003 fnic->lport->host_stats.fcp_control_requests++;
1004
1005 atomic64_dec(&fnic_stats->io_stats.active_ios);
1006 if (atomic64_read(&fnic->io_cmpl_skip))
1007 atomic64_dec(&fnic->io_cmpl_skip);
1008 else
1009 atomic64_inc(&fnic_stats->io_stats.io_completions);
1010
1011 /* Call SCSI completion function to complete the IO */
1012 if (sc->scsi_done)
1013 sc->scsi_done(sc);
1014 }
1015
1016 /* fnic_fcpio_itmf_cmpl_handler
1017 * Routine to handle itmf completions
1018 */
1019 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1020 struct fcpio_fw_req *desc)
1021 {
1022 u8 type;
1023 u8 hdr_status;
1024 struct fcpio_tag tag;
1025 u32 id;
1026 struct scsi_cmnd *sc;
1027 struct fnic_io_req *io_req;
1028 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1029 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1030 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1031 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1032 unsigned long flags;
1033 spinlock_t *io_lock;
1034 unsigned long start_time;
1035
1036 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1037 fcpio_tag_id_dec(&tag, &id);
1038
1039 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1040 shost_printk(KERN_ERR, fnic->lport->host,
1041 "Tag out of range tag %x hdr status = %s\n",
1042 id, fnic_fcpio_status_to_str(hdr_status));
1043 return;
1044 }
1045
1046 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1047 WARN_ON_ONCE(!sc);
1048 if (!sc) {
1049 atomic64_inc(&fnic_stats->io_stats.sc_null);
1050 shost_printk(KERN_ERR, fnic->lport->host,
1051 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1052 fnic_fcpio_status_to_str(hdr_status), id);
1053 return;
1054 }
1055 io_lock = fnic_io_lock_hash(fnic, sc);
1056 spin_lock_irqsave(io_lock, flags);
1057 io_req = (struct fnic_io_req *)CMD_SP(sc);
1058 WARN_ON_ONCE(!io_req);
1059 if (!io_req) {
1060 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1061 spin_unlock_irqrestore(io_lock, flags);
1062 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1063 shost_printk(KERN_ERR, fnic->lport->host,
1064 "itmf_cmpl io_req is null - "
1065 "hdr status = %s tag = 0x%x sc 0x%p\n",
1066 fnic_fcpio_status_to_str(hdr_status), id, sc);
1067 return;
1068 }
1069 start_time = io_req->start_time;
1070
1071 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1072 /* Abort and terminate completion of device reset req */
1073 /* REVISIT : Add asserts about various flags */
1074 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1075 "dev reset abts cmpl recd. id %x status %s\n",
1076 id, fnic_fcpio_status_to_str(hdr_status));
1077 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1078 CMD_ABTS_STATUS(sc) = hdr_status;
1079 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1080 if (io_req->abts_done)
1081 complete(io_req->abts_done);
1082 spin_unlock_irqrestore(io_lock, flags);
1083 } else if (id & FNIC_TAG_ABORT) {
1084 /* Completion of abort cmd */
1085 switch (hdr_status) {
1086 case FCPIO_SUCCESS:
1087 break;
1088 case FCPIO_TIMEOUT:
1089 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1090 atomic64_inc(&abts_stats->abort_fw_timeouts);
1091 else
1092 atomic64_inc(
1093 &term_stats->terminate_fw_timeouts);
1094 break;
1095 case FCPIO_IO_NOT_FOUND:
1096 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1097 atomic64_inc(&abts_stats->abort_io_not_found);
1098 else
1099 atomic64_inc(
1100 &term_stats->terminate_io_not_found);
1101 break;
1102 default:
1103 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1104 atomic64_inc(&abts_stats->abort_failures);
1105 else
1106 atomic64_inc(
1107 &term_stats->terminate_failures);
1108 break;
1109 }
1110 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1111 /* This is a late completion. Ignore it */
1112 spin_unlock_irqrestore(io_lock, flags);
1113 return;
1114 }
1115 CMD_ABTS_STATUS(sc) = hdr_status;
1116 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1117
1118 atomic64_dec(&fnic_stats->io_stats.active_ios);
1119 if (atomic64_read(&fnic->io_cmpl_skip))
1120 atomic64_dec(&fnic->io_cmpl_skip);
1121 else
1122 atomic64_inc(&fnic_stats->io_stats.io_completions);
1123
1124 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1125 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1126
1127 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1128 "abts cmpl recd. id %d status %s\n",
1129 (int)(id & FNIC_TAG_MASK),
1130 fnic_fcpio_status_to_str(hdr_status));
1131
1132 /*
1133 * If scsi_eh thread is blocked waiting for abts to complete,
1134 * signal completion to it. IO will be cleaned in the thread
1135 * else clean it in this context
1136 */
1137 if (io_req->abts_done) {
1138 complete(io_req->abts_done);
1139 spin_unlock_irqrestore(io_lock, flags);
1140 } else {
1141 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1142 "abts cmpl, completing IO\n");
1143 CMD_SP(sc) = NULL;
1144 sc->result = (DID_ERROR << 16);
1145
1146 spin_unlock_irqrestore(io_lock, flags);
1147
1148 fnic_release_ioreq_buf(fnic, io_req, sc);
1149 mempool_free(io_req, fnic->io_req_pool);
1150 if (sc->scsi_done) {
1151 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1152 sc->device->host->host_no, id,
1153 sc,
1154 jiffies_to_msecs(jiffies - start_time),
1155 desc,
1156 (((u64)hdr_status << 40) |
1157 (u64)sc->cmnd[0] << 32 |
1158 (u64)sc->cmnd[2] << 24 |
1159 (u64)sc->cmnd[3] << 16 |
1160 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1161 (((u64)CMD_FLAGS(sc) << 32) |
1162 CMD_STATE(sc)));
1163 sc->scsi_done(sc);
1164 }
1165 }
1166
1167 } else if (id & FNIC_TAG_DEV_RST) {
1168 /* Completion of device reset */
1169 CMD_LR_STATUS(sc) = hdr_status;
1170 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1171 spin_unlock_irqrestore(io_lock, flags);
1172 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1173 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1174 sc->device->host->host_no, id, sc,
1175 jiffies_to_msecs(jiffies - start_time),
1176 desc, 0,
1177 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1178 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1179 "Terminate pending "
1180 "dev reset cmpl recd. id %d status %s\n",
1181 (int)(id & FNIC_TAG_MASK),
1182 fnic_fcpio_status_to_str(hdr_status));
1183 return;
1184 }
1185 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1186 /* Need to wait for terminate completion */
1187 spin_unlock_irqrestore(io_lock, flags);
1188 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1189 sc->device->host->host_no, id, sc,
1190 jiffies_to_msecs(jiffies - start_time),
1191 desc, 0,
1192 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1193 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1194 "dev reset cmpl recd after time out. "
1195 "id %d status %s\n",
1196 (int)(id & FNIC_TAG_MASK),
1197 fnic_fcpio_status_to_str(hdr_status));
1198 return;
1199 }
1200 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1201 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1202 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1203 "dev reset cmpl recd. id %d status %s\n",
1204 (int)(id & FNIC_TAG_MASK),
1205 fnic_fcpio_status_to_str(hdr_status));
1206 if (io_req->dr_done)
1207 complete(io_req->dr_done);
1208 spin_unlock_irqrestore(io_lock, flags);
1209
1210 } else {
1211 shost_printk(KERN_ERR, fnic->lport->host,
1212 "Unexpected itmf io state %s tag %x\n",
1213 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1214 spin_unlock_irqrestore(io_lock, flags);
1215 }
1216
1217 }
1218
1219 /*
1220 * fnic_fcpio_cmpl_handler
1221 * Routine to service the cq for wq_copy
1222 */
1223 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1224 unsigned int cq_index,
1225 struct fcpio_fw_req *desc)
1226 {
1227 struct fnic *fnic = vnic_dev_priv(vdev);
1228
1229 switch (desc->hdr.type) {
1230 case FCPIO_ICMND_CMPL: /* fw completed a command */
1231 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1232 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1233 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1234 case FCPIO_RESET_CMPL: /* fw completed reset */
1235 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1236 break;
1237 default:
1238 break;
1239 }
1240
1241 switch (desc->hdr.type) {
1242 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1243 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1244 break;
1245
1246 case FCPIO_ICMND_CMPL: /* fw completed a command */
1247 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1248 break;
1249
1250 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1251 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1252 break;
1253
1254 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1255 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1256 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1257 break;
1258
1259 case FCPIO_RESET_CMPL: /* fw completed reset */
1260 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1261 break;
1262
1263 default:
1264 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1265 "firmware completion type %d\n",
1266 desc->hdr.type);
1267 break;
1268 }
1269
1270 return 0;
1271 }
1272
1273 /*
1274 * fnic_wq_copy_cmpl_handler
1275 * Routine to process wq copy
1276 */
1277 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1278 {
1279 unsigned int wq_work_done = 0;
1280 unsigned int i, cq_index;
1281 unsigned int cur_work_done;
1282
1283 for (i = 0; i < fnic->wq_copy_count; i++) {
1284 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1285 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1286 fnic_fcpio_cmpl_handler,
1287 copy_work_to_do);
1288 wq_work_done += cur_work_done;
1289 }
1290 return wq_work_done;
1291 }
1292
1293 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1294 {
1295 int i;
1296 struct fnic_io_req *io_req;
1297 unsigned long flags = 0;
1298 struct scsi_cmnd *sc;
1299 spinlock_t *io_lock;
1300 unsigned long start_time = 0;
1301 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1302
1303 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1304 if (i == exclude_id)
1305 continue;
1306
1307 io_lock = fnic_io_lock_tag(fnic, i);
1308 spin_lock_irqsave(io_lock, flags);
1309 sc = scsi_host_find_tag(fnic->lport->host, i);
1310 if (!sc) {
1311 spin_unlock_irqrestore(io_lock, flags);
1312 continue;
1313 }
1314
1315 io_req = (struct fnic_io_req *)CMD_SP(sc);
1316 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1317 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1318 /*
1319 * We will be here only when FW completes reset
1320 * without sending completions for outstanding ios.
1321 */
1322 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1323 if (io_req && io_req->dr_done)
1324 complete(io_req->dr_done);
1325 else if (io_req && io_req->abts_done)
1326 complete(io_req->abts_done);
1327 spin_unlock_irqrestore(io_lock, flags);
1328 continue;
1329 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1330 spin_unlock_irqrestore(io_lock, flags);
1331 continue;
1332 }
1333 if (!io_req) {
1334 spin_unlock_irqrestore(io_lock, flags);
1335 goto cleanup_scsi_cmd;
1336 }
1337
1338 CMD_SP(sc) = NULL;
1339
1340 spin_unlock_irqrestore(io_lock, flags);
1341
1342 /*
1343 * If there is a scsi_cmnd associated with this io_req, then
1344 * free the corresponding state
1345 */
1346 start_time = io_req->start_time;
1347 fnic_release_ioreq_buf(fnic, io_req, sc);
1348 mempool_free(io_req, fnic->io_req_pool);
1349
1350 cleanup_scsi_cmd:
1351 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1352 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1353 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n",
1354 __func__, (jiffies - start_time));
1355
1356 if (atomic64_read(&fnic->io_cmpl_skip))
1357 atomic64_dec(&fnic->io_cmpl_skip);
1358 else
1359 atomic64_inc(&fnic_stats->io_stats.io_completions);
1360
1361 /* Complete the command to SCSI */
1362 if (sc->scsi_done) {
1363 FNIC_TRACE(fnic_cleanup_io,
1364 sc->device->host->host_no, i, sc,
1365 jiffies_to_msecs(jiffies - start_time),
1366 0, ((u64)sc->cmnd[0] << 32 |
1367 (u64)sc->cmnd[2] << 24 |
1368 (u64)sc->cmnd[3] << 16 |
1369 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1370 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1371
1372 sc->scsi_done(sc);
1373 }
1374 }
1375 }
1376
1377 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1378 struct fcpio_host_req *desc)
1379 {
1380 u32 id;
1381 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1382 struct fnic_io_req *io_req;
1383 struct scsi_cmnd *sc;
1384 unsigned long flags;
1385 spinlock_t *io_lock;
1386 unsigned long start_time = 0;
1387
1388 /* get the tag reference */
1389 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1390 id &= FNIC_TAG_MASK;
1391
1392 if (id >= fnic->fnic_max_tag_id)
1393 return;
1394
1395 sc = scsi_host_find_tag(fnic->lport->host, id);
1396 if (!sc)
1397 return;
1398
1399 io_lock = fnic_io_lock_hash(fnic, sc);
1400 spin_lock_irqsave(io_lock, flags);
1401
1402 /* Get the IO context which this desc refers to */
1403 io_req = (struct fnic_io_req *)CMD_SP(sc);
1404
1405 /* fnic interrupts are turned off by now */
1406
1407 if (!io_req) {
1408 spin_unlock_irqrestore(io_lock, flags);
1409 goto wq_copy_cleanup_scsi_cmd;
1410 }
1411
1412 CMD_SP(sc) = NULL;
1413
1414 spin_unlock_irqrestore(io_lock, flags);
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 wq_copy_cleanup_scsi_cmd:
1421 sc->result = DID_NO_CONNECT << 16;
1422 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1423 " DID_NO_CONNECT\n");
1424
1425 if (sc->scsi_done) {
1426 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1427 sc->device->host->host_no, id, sc,
1428 jiffies_to_msecs(jiffies - start_time),
1429 0, ((u64)sc->cmnd[0] << 32 |
1430 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1431 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1432 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1433
1434 sc->scsi_done(sc);
1435 }
1436 }
1437
1438 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1439 u32 task_req, u8 *fc_lun,
1440 struct fnic_io_req *io_req)
1441 {
1442 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1443 struct Scsi_Host *host = fnic->lport->host;
1444 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1445 unsigned long flags;
1446
1447 spin_lock_irqsave(host->host_lock, flags);
1448 if (unlikely(fnic_chk_state_flags_locked(fnic,
1449 FNIC_FLAGS_IO_BLOCKED))) {
1450 spin_unlock_irqrestore(host->host_lock, flags);
1451 return 1;
1452 } else
1453 atomic_inc(&fnic->in_flight);
1454 spin_unlock_irqrestore(host->host_lock, flags);
1455
1456 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1457
1458 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1459 free_wq_copy_descs(fnic, wq);
1460
1461 if (!vnic_wq_copy_desc_avail(wq)) {
1462 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1463 atomic_dec(&fnic->in_flight);
1464 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1465 "fnic_queue_abort_io_req: failure: no descriptors\n");
1466 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1467 return 1;
1468 }
1469 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1470 0, task_req, tag, fc_lun, io_req->port_id,
1471 fnic->config.ra_tov, fnic->config.ed_tov);
1472
1473 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1474 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1475 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1476 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1477 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1478
1479 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1480 atomic_dec(&fnic->in_flight);
1481
1482 return 0;
1483 }
1484
1485 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1486 {
1487 int tag;
1488 int abt_tag;
1489 int term_cnt = 0;
1490 struct fnic_io_req *io_req;
1491 spinlock_t *io_lock;
1492 unsigned long flags;
1493 struct scsi_cmnd *sc;
1494 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1495 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1496 struct scsi_lun fc_lun;
1497 enum fnic_ioreq_state old_ioreq_state;
1498
1499 FNIC_SCSI_DBG(KERN_DEBUG,
1500 fnic->lport->host,
1501 "fnic_rport_exch_reset called portid 0x%06x\n",
1502 port_id);
1503
1504 if (fnic->in_remove)
1505 return;
1506
1507 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1508 abt_tag = tag;
1509 io_lock = fnic_io_lock_tag(fnic, tag);
1510 spin_lock_irqsave(io_lock, flags);
1511 sc = scsi_host_find_tag(fnic->lport->host, tag);
1512 if (!sc) {
1513 spin_unlock_irqrestore(io_lock, flags);
1514 continue;
1515 }
1516
1517 io_req = (struct fnic_io_req *)CMD_SP(sc);
1518
1519 if (!io_req || io_req->port_id != port_id) {
1520 spin_unlock_irqrestore(io_lock, flags);
1521 continue;
1522 }
1523
1524 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1525 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1526 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1527 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1528 sc);
1529 spin_unlock_irqrestore(io_lock, flags);
1530 continue;
1531 }
1532
1533 /*
1534 * Found IO that is still pending with firmware and
1535 * belongs to rport that went away
1536 */
1537 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1538 spin_unlock_irqrestore(io_lock, flags);
1539 continue;
1540 }
1541 if (io_req->abts_done) {
1542 shost_printk(KERN_ERR, fnic->lport->host,
1543 "fnic_rport_exch_reset: io_req->abts_done is set "
1544 "state is %s\n",
1545 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1546 }
1547
1548 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1549 shost_printk(KERN_ERR, fnic->lport->host,
1550 "rport_exch_reset "
1551 "IO not yet issued %p tag 0x%x flags "
1552 "%x state %d\n",
1553 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1554 }
1555 old_ioreq_state = CMD_STATE(sc);
1556 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1557 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1558 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1559 atomic64_inc(&reset_stats->device_reset_terminates);
1560 abt_tag = (tag | FNIC_TAG_DEV_RST);
1561 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1562 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1563 sc);
1564 }
1565
1566 BUG_ON(io_req->abts_done);
1567
1568 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1569 "fnic_rport_reset_exch: Issuing abts\n");
1570
1571 spin_unlock_irqrestore(io_lock, flags);
1572
1573 /* Now queue the abort command to firmware */
1574 int_to_scsilun(sc->device->lun, &fc_lun);
1575
1576 if (fnic_queue_abort_io_req(fnic, abt_tag,
1577 FCPIO_ITMF_ABT_TASK_TERM,
1578 fc_lun.scsi_lun, io_req)) {
1579 /*
1580 * Revert the cmd state back to old state, if
1581 * it hasn't changed in between. This cmd will get
1582 * aborted later by scsi_eh, or cleaned up during
1583 * lun reset
1584 */
1585 spin_lock_irqsave(io_lock, flags);
1586 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1587 CMD_STATE(sc) = old_ioreq_state;
1588 spin_unlock_irqrestore(io_lock, flags);
1589 } else {
1590 spin_lock_irqsave(io_lock, flags);
1591 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1592 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1593 else
1594 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1595 spin_unlock_irqrestore(io_lock, flags);
1596 atomic64_inc(&term_stats->terminates);
1597 term_cnt++;
1598 }
1599 }
1600 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1601 atomic64_set(&term_stats->max_terminates, term_cnt);
1602
1603 }
1604
1605 void fnic_terminate_rport_io(struct fc_rport *rport)
1606 {
1607 int tag;
1608 int abt_tag;
1609 int term_cnt = 0;
1610 struct fnic_io_req *io_req;
1611 spinlock_t *io_lock;
1612 unsigned long flags;
1613 struct scsi_cmnd *sc;
1614 struct scsi_lun fc_lun;
1615 struct fc_rport_libfc_priv *rdata;
1616 struct fc_lport *lport;
1617 struct fnic *fnic;
1618 struct fc_rport *cmd_rport;
1619 struct reset_stats *reset_stats;
1620 struct terminate_stats *term_stats;
1621 enum fnic_ioreq_state old_ioreq_state;
1622
1623 if (!rport) {
1624 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1625 return;
1626 }
1627 rdata = rport->dd_data;
1628
1629 if (!rdata) {
1630 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1631 return;
1632 }
1633 lport = rdata->local_port;
1634
1635 if (!lport) {
1636 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1637 return;
1638 }
1639 fnic = lport_priv(lport);
1640 FNIC_SCSI_DBG(KERN_DEBUG,
1641 fnic->lport->host, "fnic_terminate_rport_io called"
1642 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1643 rport->port_name, rport->node_name, rport,
1644 rport->port_id);
1645
1646 if (fnic->in_remove)
1647 return;
1648
1649 reset_stats = &fnic->fnic_stats.reset_stats;
1650 term_stats = &fnic->fnic_stats.term_stats;
1651
1652 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1653 abt_tag = tag;
1654 io_lock = fnic_io_lock_tag(fnic, tag);
1655 spin_lock_irqsave(io_lock, flags);
1656 sc = scsi_host_find_tag(fnic->lport->host, tag);
1657 if (!sc) {
1658 spin_unlock_irqrestore(io_lock, flags);
1659 continue;
1660 }
1661
1662 cmd_rport = starget_to_rport(scsi_target(sc->device));
1663 if (rport != cmd_rport) {
1664 spin_unlock_irqrestore(io_lock, flags);
1665 continue;
1666 }
1667
1668 io_req = (struct fnic_io_req *)CMD_SP(sc);
1669
1670 if (!io_req || rport != cmd_rport) {
1671 spin_unlock_irqrestore(io_lock, flags);
1672 continue;
1673 }
1674
1675 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1676 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1677 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1678 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1679 sc);
1680 spin_unlock_irqrestore(io_lock, flags);
1681 continue;
1682 }
1683 /*
1684 * Found IO that is still pending with firmware and
1685 * belongs to rport that went away
1686 */
1687 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1688 spin_unlock_irqrestore(io_lock, flags);
1689 continue;
1690 }
1691 if (io_req->abts_done) {
1692 shost_printk(KERN_ERR, fnic->lport->host,
1693 "fnic_terminate_rport_io: io_req->abts_done is set "
1694 "state is %s\n",
1695 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1696 }
1697 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1698 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1699 "fnic_terminate_rport_io "
1700 "IO not yet issued %p tag 0x%x flags "
1701 "%x state %d\n",
1702 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1703 }
1704 old_ioreq_state = CMD_STATE(sc);
1705 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1706 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1707 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1708 atomic64_inc(&reset_stats->device_reset_terminates);
1709 abt_tag = (tag | FNIC_TAG_DEV_RST);
1710 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1711 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1712 }
1713
1714 BUG_ON(io_req->abts_done);
1715
1716 FNIC_SCSI_DBG(KERN_DEBUG,
1717 fnic->lport->host,
1718 "fnic_terminate_rport_io: Issuing abts\n");
1719
1720 spin_unlock_irqrestore(io_lock, flags);
1721
1722 /* Now queue the abort command to firmware */
1723 int_to_scsilun(sc->device->lun, &fc_lun);
1724
1725 if (fnic_queue_abort_io_req(fnic, abt_tag,
1726 FCPIO_ITMF_ABT_TASK_TERM,
1727 fc_lun.scsi_lun, io_req)) {
1728 /*
1729 * Revert the cmd state back to old state, if
1730 * it hasn't changed in between. This cmd will get
1731 * aborted later by scsi_eh, or cleaned up during
1732 * lun reset
1733 */
1734 spin_lock_irqsave(io_lock, flags);
1735 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1736 CMD_STATE(sc) = old_ioreq_state;
1737 spin_unlock_irqrestore(io_lock, flags);
1738 } else {
1739 spin_lock_irqsave(io_lock, flags);
1740 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1741 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1742 else
1743 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1744 spin_unlock_irqrestore(io_lock, flags);
1745 atomic64_inc(&term_stats->terminates);
1746 term_cnt++;
1747 }
1748 }
1749 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1750 atomic64_set(&term_stats->max_terminates, term_cnt);
1751
1752 }
1753
1754 /*
1755 * This function is exported to SCSI for sending abort cmnds.
1756 * A SCSI IO is represented by a io_req in the driver.
1757 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1758 */
1759 int fnic_abort_cmd(struct scsi_cmnd *sc)
1760 {
1761 struct fc_lport *lp;
1762 struct fnic *fnic;
1763 struct fnic_io_req *io_req = NULL;
1764 struct fc_rport *rport;
1765 spinlock_t *io_lock;
1766 unsigned long flags;
1767 unsigned long start_time = 0;
1768 int ret = SUCCESS;
1769 u32 task_req = 0;
1770 struct scsi_lun fc_lun;
1771 struct fnic_stats *fnic_stats;
1772 struct abort_stats *abts_stats;
1773 struct terminate_stats *term_stats;
1774 enum fnic_ioreq_state old_ioreq_state;
1775 int tag;
1776 DECLARE_COMPLETION_ONSTACK(tm_done);
1777
1778 /* Wait for rport to unblock */
1779 fc_block_scsi_eh(sc);
1780
1781 /* Get local-port, check ready and link up */
1782 lp = shost_priv(sc->device->host);
1783
1784 fnic = lport_priv(lp);
1785 fnic_stats = &fnic->fnic_stats;
1786 abts_stats = &fnic->fnic_stats.abts_stats;
1787 term_stats = &fnic->fnic_stats.term_stats;
1788
1789 rport = starget_to_rport(scsi_target(sc->device));
1790 tag = sc->request->tag;
1791 FNIC_SCSI_DBG(KERN_DEBUG,
1792 fnic->lport->host,
1793 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1794 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1795
1796 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1797
1798 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1799 ret = FAILED;
1800 goto fnic_abort_cmd_end;
1801 }
1802
1803 /*
1804 * Avoid a race between SCSI issuing the abort and the device
1805 * completing the command.
1806 *
1807 * If the command is already completed by the fw cmpl code,
1808 * we just return SUCCESS from here. This means that the abort
1809 * succeeded. In the SCSI ML, since the timeout for command has
1810 * happened, the completion wont actually complete the command
1811 * and it will be considered as an aborted command
1812 *
1813 * The CMD_SP will not be cleared except while holding io_req_lock.
1814 */
1815 io_lock = fnic_io_lock_hash(fnic, sc);
1816 spin_lock_irqsave(io_lock, flags);
1817 io_req = (struct fnic_io_req *)CMD_SP(sc);
1818 if (!io_req) {
1819 spin_unlock_irqrestore(io_lock, flags);
1820 goto fnic_abort_cmd_end;
1821 }
1822
1823 io_req->abts_done = &tm_done;
1824
1825 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1826 spin_unlock_irqrestore(io_lock, flags);
1827 goto wait_pending;
1828 }
1829 /*
1830 * Command is still pending, need to abort it
1831 * If the firmware completes the command after this point,
1832 * the completion wont be done till mid-layer, since abort
1833 * has already started.
1834 */
1835 old_ioreq_state = CMD_STATE(sc);
1836 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1837 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1838
1839 spin_unlock_irqrestore(io_lock, flags);
1840
1841 /*
1842 * Check readiness of the remote port. If the path to remote
1843 * port is up, then send abts to the remote port to terminate
1844 * the IO. Else, just locally terminate the IO in the firmware
1845 */
1846 if (fc_remote_port_chkready(rport) == 0)
1847 task_req = FCPIO_ITMF_ABT_TASK;
1848 else {
1849 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1850 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1851 }
1852
1853 /* Now queue the abort command to firmware */
1854 int_to_scsilun(sc->device->lun, &fc_lun);
1855
1856 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1857 fc_lun.scsi_lun, io_req)) {
1858 spin_lock_irqsave(io_lock, flags);
1859 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1860 CMD_STATE(sc) = old_ioreq_state;
1861 io_req = (struct fnic_io_req *)CMD_SP(sc);
1862 if (io_req)
1863 io_req->abts_done = NULL;
1864 spin_unlock_irqrestore(io_lock, flags);
1865 ret = FAILED;
1866 goto fnic_abort_cmd_end;
1867 }
1868 if (task_req == FCPIO_ITMF_ABT_TASK) {
1869 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1870 atomic64_inc(&fnic_stats->abts_stats.aborts);
1871 } else {
1872 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1873 atomic64_inc(&fnic_stats->term_stats.terminates);
1874 }
1875
1876 /*
1877 * We queued an abort IO, wait for its completion.
1878 * Once the firmware completes the abort command, it will
1879 * wake up this thread.
1880 */
1881 wait_pending:
1882 wait_for_completion_timeout(&tm_done,
1883 msecs_to_jiffies
1884 (2 * fnic->config.ra_tov +
1885 fnic->config.ed_tov));
1886
1887 /* Check the abort status */
1888 spin_lock_irqsave(io_lock, flags);
1889
1890 io_req = (struct fnic_io_req *)CMD_SP(sc);
1891 if (!io_req) {
1892 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1893 spin_unlock_irqrestore(io_lock, flags);
1894 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1895 ret = FAILED;
1896 goto fnic_abort_cmd_end;
1897 }
1898 io_req->abts_done = NULL;
1899
1900 /* fw did not complete abort, timed out */
1901 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1902 spin_unlock_irqrestore(io_lock, flags);
1903 if (task_req == FCPIO_ITMF_ABT_TASK) {
1904 atomic64_inc(&abts_stats->abort_drv_timeouts);
1905 } else {
1906 atomic64_inc(&term_stats->terminate_drv_timeouts);
1907 }
1908 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1909 ret = FAILED;
1910 goto fnic_abort_cmd_end;
1911 }
1912
1913 /* IO out of order */
1914
1915 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1916 spin_unlock_irqrestore(io_lock, flags);
1917 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1918 "Issuing Host reset due to out of order IO\n");
1919
1920 if (fnic_host_reset(sc) == FAILED) {
1921 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1922 "fnic_host_reset failed.\n");
1923 }
1924 ret = FAILED;
1925 goto fnic_abort_cmd_end;
1926 }
1927
1928 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1929
1930 /*
1931 * firmware completed the abort, check the status,
1932 * free the io_req irrespective of failure or success
1933 */
1934 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1935 ret = FAILED;
1936
1937 CMD_SP(sc) = NULL;
1938
1939 spin_unlock_irqrestore(io_lock, flags);
1940
1941 start_time = io_req->start_time;
1942 fnic_release_ioreq_buf(fnic, io_req, sc);
1943 mempool_free(io_req, fnic->io_req_pool);
1944
1945 fnic_abort_cmd_end:
1946 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1947 sc->request->tag, sc,
1948 jiffies_to_msecs(jiffies - start_time),
1949 0, ((u64)sc->cmnd[0] << 32 |
1950 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1951 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1952 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1953
1954 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1955 "Returning from abort cmd type %x %s\n", task_req,
1956 (ret == SUCCESS) ?
1957 "SUCCESS" : "FAILED");
1958 return ret;
1959 }
1960
1961 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1962 struct scsi_cmnd *sc,
1963 struct fnic_io_req *io_req)
1964 {
1965 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1966 struct Scsi_Host *host = fnic->lport->host;
1967 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1968 struct scsi_lun fc_lun;
1969 int ret = 0;
1970 unsigned long intr_flags;
1971
1972 spin_lock_irqsave(host->host_lock, intr_flags);
1973 if (unlikely(fnic_chk_state_flags_locked(fnic,
1974 FNIC_FLAGS_IO_BLOCKED))) {
1975 spin_unlock_irqrestore(host->host_lock, intr_flags);
1976 return FAILED;
1977 } else
1978 atomic_inc(&fnic->in_flight);
1979 spin_unlock_irqrestore(host->host_lock, intr_flags);
1980
1981 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1982
1983 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1984 free_wq_copy_descs(fnic, wq);
1985
1986 if (!vnic_wq_copy_desc_avail(wq)) {
1987 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1988 "queue_dr_io_req failure - no descriptors\n");
1989 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
1990 ret = -EAGAIN;
1991 goto lr_io_req_end;
1992 }
1993
1994 /* fill in the lun info */
1995 int_to_scsilun(sc->device->lun, &fc_lun);
1996
1997 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1998 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1999 fc_lun.scsi_lun, io_req->port_id,
2000 fnic->config.ra_tov, fnic->config.ed_tov);
2001
2002 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
2003 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
2004 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
2005 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
2006 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
2007
2008 lr_io_req_end:
2009 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
2010 atomic_dec(&fnic->in_flight);
2011
2012 return ret;
2013 }
2014
2015 /*
2016 * Clean up any pending aborts on the lun
2017 * For each outstanding IO on this lun, whose abort is not completed by fw,
2018 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2019 * successfully aborted, 1 otherwise
2020 */
2021 static int fnic_clean_pending_aborts(struct fnic *fnic,
2022 struct scsi_cmnd *lr_sc)
2023 {
2024 int tag, abt_tag;
2025 struct fnic_io_req *io_req;
2026 spinlock_t *io_lock;
2027 unsigned long flags;
2028 int ret = 0;
2029 struct scsi_cmnd *sc;
2030 struct scsi_lun fc_lun;
2031 struct scsi_device *lun_dev = lr_sc->device;
2032 DECLARE_COMPLETION_ONSTACK(tm_done);
2033 enum fnic_ioreq_state old_ioreq_state;
2034
2035 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2036 io_lock = fnic_io_lock_tag(fnic, tag);
2037 spin_lock_irqsave(io_lock, flags);
2038 sc = scsi_host_find_tag(fnic->lport->host, tag);
2039 /*
2040 * ignore this lun reset cmd or cmds that do not belong to
2041 * this lun
2042 */
2043 if (!sc || sc == lr_sc || sc->device != lun_dev) {
2044 spin_unlock_irqrestore(io_lock, flags);
2045 continue;
2046 }
2047
2048 io_req = (struct fnic_io_req *)CMD_SP(sc);
2049
2050 if (!io_req || sc->device != lun_dev) {
2051 spin_unlock_irqrestore(io_lock, flags);
2052 continue;
2053 }
2054
2055 /*
2056 * Found IO that is still pending with firmware and
2057 * belongs to the LUN that we are resetting
2058 */
2059 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2060 "Found IO in %s on lun\n",
2061 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2062
2063 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2064 spin_unlock_irqrestore(io_lock, flags);
2065 continue;
2066 }
2067 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2068 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2069 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2070 "%s dev rst not pending sc 0x%p\n", __func__,
2071 sc);
2072 spin_unlock_irqrestore(io_lock, flags);
2073 continue;
2074 }
2075
2076 if (io_req->abts_done)
2077 shost_printk(KERN_ERR, fnic->lport->host,
2078 "%s: io_req->abts_done is set state is %s\n",
2079 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2080 old_ioreq_state = CMD_STATE(sc);
2081 /*
2082 * Any pending IO issued prior to reset is expected to be
2083 * in abts pending state, if not we need to set
2084 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2085 * When IO is completed, the IO will be handed over and
2086 * handled in this function.
2087 */
2088 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2089
2090 BUG_ON(io_req->abts_done);
2091
2092 abt_tag = tag;
2093 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2094 abt_tag |= FNIC_TAG_DEV_RST;
2095 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2096 "%s: dev rst sc 0x%p\n", __func__, sc);
2097 }
2098
2099 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2100 io_req->abts_done = &tm_done;
2101 spin_unlock_irqrestore(io_lock, flags);
2102
2103 /* Now queue the abort command to firmware */
2104 int_to_scsilun(sc->device->lun, &fc_lun);
2105
2106 if (fnic_queue_abort_io_req(fnic, abt_tag,
2107 FCPIO_ITMF_ABT_TASK_TERM,
2108 fc_lun.scsi_lun, io_req)) {
2109 spin_lock_irqsave(io_lock, flags);
2110 io_req = (struct fnic_io_req *)CMD_SP(sc);
2111 if (io_req)
2112 io_req->abts_done = NULL;
2113 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2114 CMD_STATE(sc) = old_ioreq_state;
2115 spin_unlock_irqrestore(io_lock, flags);
2116 ret = 1;
2117 goto clean_pending_aborts_end;
2118 } else {
2119 spin_lock_irqsave(io_lock, flags);
2120 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2121 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2122 spin_unlock_irqrestore(io_lock, flags);
2123 }
2124 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2125
2126 wait_for_completion_timeout(&tm_done,
2127 msecs_to_jiffies
2128 (fnic->config.ed_tov));
2129
2130 /* Recheck cmd state to check if it is now aborted */
2131 spin_lock_irqsave(io_lock, flags);
2132 io_req = (struct fnic_io_req *)CMD_SP(sc);
2133 if (!io_req) {
2134 spin_unlock_irqrestore(io_lock, flags);
2135 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2136 continue;
2137 }
2138
2139 io_req->abts_done = NULL;
2140
2141 /* if abort is still pending with fw, fail */
2142 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2143 spin_unlock_irqrestore(io_lock, flags);
2144 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2145 ret = 1;
2146 goto clean_pending_aborts_end;
2147 }
2148 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2149 CMD_SP(sc) = NULL;
2150 spin_unlock_irqrestore(io_lock, flags);
2151
2152 fnic_release_ioreq_buf(fnic, io_req, sc);
2153 mempool_free(io_req, fnic->io_req_pool);
2154 }
2155
2156 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2157
2158 /* walk again to check, if IOs are still pending in fw */
2159 if (fnic_is_abts_pending(fnic, lr_sc))
2160 ret = FAILED;
2161
2162 clean_pending_aborts_end:
2163 return ret;
2164 }
2165
2166 /**
2167 * fnic_scsi_host_start_tag
2168 * Allocates tagid from host's tag list
2169 **/
2170 static inline int
2171 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2172 {
2173 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2174 int tag, ret = SCSI_NO_TAG;
2175
2176 BUG_ON(!bqt);
2177 if (!bqt) {
2178 pr_err("Tags are not supported\n");
2179 goto end;
2180 }
2181
2182 do {
2183 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
2184 if (tag >= bqt->max_depth) {
2185 pr_err("Tag allocation failure\n");
2186 goto end;
2187 }
2188 } while (test_and_set_bit(tag, bqt->tag_map));
2189
2190 bqt->tag_index[tag] = sc->request;
2191 sc->request->tag = tag;
2192 sc->tag = tag;
2193 if (!sc->request->special)
2194 sc->request->special = sc;
2195
2196 ret = tag;
2197
2198 end:
2199 return ret;
2200 }
2201
2202 /**
2203 * fnic_scsi_host_end_tag
2204 * frees tag allocated by fnic_scsi_host_start_tag.
2205 **/
2206 static inline void
2207 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2208 {
2209 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2210 int tag = sc->request->tag;
2211
2212 if (tag == SCSI_NO_TAG)
2213 return;
2214
2215 BUG_ON(!bqt || !bqt->tag_index[tag]);
2216 if (!bqt)
2217 return;
2218
2219 bqt->tag_index[tag] = NULL;
2220 clear_bit(tag, bqt->tag_map);
2221
2222 return;
2223 }
2224
2225 /*
2226 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2227 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2228 * on the LUN.
2229 */
2230 int fnic_device_reset(struct scsi_cmnd *sc)
2231 {
2232 struct fc_lport *lp;
2233 struct fnic *fnic;
2234 struct fnic_io_req *io_req = NULL;
2235 struct fc_rport *rport;
2236 int status;
2237 int ret = FAILED;
2238 spinlock_t *io_lock;
2239 unsigned long flags;
2240 unsigned long start_time = 0;
2241 struct scsi_lun fc_lun;
2242 struct fnic_stats *fnic_stats;
2243 struct reset_stats *reset_stats;
2244 int tag = 0;
2245 DECLARE_COMPLETION_ONSTACK(tm_done);
2246 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2247
2248 /* Wait for rport to unblock */
2249 fc_block_scsi_eh(sc);
2250
2251 /* Get local-port, check ready and link up */
2252 lp = shost_priv(sc->device->host);
2253
2254 fnic = lport_priv(lp);
2255 fnic_stats = &fnic->fnic_stats;
2256 reset_stats = &fnic->fnic_stats.reset_stats;
2257
2258 atomic64_inc(&reset_stats->device_resets);
2259
2260 rport = starget_to_rport(scsi_target(sc->device));
2261 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2262 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2263 rport->port_id, sc->device->lun, sc);
2264
2265 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2266 goto fnic_device_reset_end;
2267
2268 /* Check if remote port up */
2269 if (fc_remote_port_chkready(rport)) {
2270 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2271 goto fnic_device_reset_end;
2272 }
2273
2274 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2275 /* Allocate tag if not present */
2276
2277 tag = sc->request->tag;
2278 if (unlikely(tag < 0)) {
2279 /*
2280 * XXX(hch): current the midlayer fakes up a struct
2281 * request for the explicit reset ioctls, and those
2282 * don't have a tag allocated to them. The below
2283 * code pokes into midlayer structures to paper over
2284 * this design issue, but that won't work for blk-mq.
2285 *
2286 * Either someone who can actually test the hardware
2287 * will have to come up with a similar hack for the
2288 * blk-mq case, or we'll have to bite the bullet and
2289 * fix the way the EH ioctls work for real, but until
2290 * that happens we fail these explicit requests here.
2291 */
2292 if (shost_use_blk_mq(sc->device->host))
2293 goto fnic_device_reset_end;
2294
2295 tag = fnic_scsi_host_start_tag(fnic, sc);
2296 if (unlikely(tag == SCSI_NO_TAG))
2297 goto fnic_device_reset_end;
2298 tag_gen_flag = 1;
2299 }
2300 io_lock = fnic_io_lock_hash(fnic, sc);
2301 spin_lock_irqsave(io_lock, flags);
2302 io_req = (struct fnic_io_req *)CMD_SP(sc);
2303
2304 /*
2305 * If there is a io_req attached to this command, then use it,
2306 * else allocate a new one.
2307 */
2308 if (!io_req) {
2309 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2310 if (!io_req) {
2311 spin_unlock_irqrestore(io_lock, flags);
2312 goto fnic_device_reset_end;
2313 }
2314 memset(io_req, 0, sizeof(*io_req));
2315 io_req->port_id = rport->port_id;
2316 CMD_SP(sc) = (char *)io_req;
2317 }
2318 io_req->dr_done = &tm_done;
2319 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2320 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2321 spin_unlock_irqrestore(io_lock, flags);
2322
2323 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2324
2325 /*
2326 * issue the device reset, if enqueue failed, clean up the ioreq
2327 * and break assoc with scsi cmd
2328 */
2329 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2330 spin_lock_irqsave(io_lock, flags);
2331 io_req = (struct fnic_io_req *)CMD_SP(sc);
2332 if (io_req)
2333 io_req->dr_done = NULL;
2334 goto fnic_device_reset_clean;
2335 }
2336 spin_lock_irqsave(io_lock, flags);
2337 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2338 spin_unlock_irqrestore(io_lock, flags);
2339
2340 /*
2341 * Wait on the local completion for LUN reset. The io_req may be
2342 * freed while we wait since we hold no lock.
2343 */
2344 wait_for_completion_timeout(&tm_done,
2345 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2346
2347 spin_lock_irqsave(io_lock, flags);
2348 io_req = (struct fnic_io_req *)CMD_SP(sc);
2349 if (!io_req) {
2350 spin_unlock_irqrestore(io_lock, flags);
2351 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2352 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2353 goto fnic_device_reset_end;
2354 }
2355 io_req->dr_done = NULL;
2356
2357 status = CMD_LR_STATUS(sc);
2358
2359 /*
2360 * If lun reset not completed, bail out with failed. io_req
2361 * gets cleaned up during higher levels of EH
2362 */
2363 if (status == FCPIO_INVALID_CODE) {
2364 atomic64_inc(&reset_stats->device_reset_timeouts);
2365 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2366 "Device reset timed out\n");
2367 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2368 spin_unlock_irqrestore(io_lock, flags);
2369 int_to_scsilun(sc->device->lun, &fc_lun);
2370 /*
2371 * Issue abort and terminate on device reset request.
2372 * If q'ing of terminate fails, retry it after a delay.
2373 */
2374 while (1) {
2375 spin_lock_irqsave(io_lock, flags);
2376 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2377 spin_unlock_irqrestore(io_lock, flags);
2378 break;
2379 }
2380 spin_unlock_irqrestore(io_lock, flags);
2381 if (fnic_queue_abort_io_req(fnic,
2382 tag | FNIC_TAG_DEV_RST,
2383 FCPIO_ITMF_ABT_TASK_TERM,
2384 fc_lun.scsi_lun, io_req)) {
2385 wait_for_completion_timeout(&tm_done,
2386 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2387 } else {
2388 spin_lock_irqsave(io_lock, flags);
2389 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2390 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2391 io_req->abts_done = &tm_done;
2392 spin_unlock_irqrestore(io_lock, flags);
2393 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2394 "Abort and terminate issued on Device reset "
2395 "tag 0x%x sc 0x%p\n", tag, sc);
2396 break;
2397 }
2398 }
2399 while (1) {
2400 spin_lock_irqsave(io_lock, flags);
2401 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2402 spin_unlock_irqrestore(io_lock, flags);
2403 wait_for_completion_timeout(&tm_done,
2404 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2405 break;
2406 } else {
2407 io_req = (struct fnic_io_req *)CMD_SP(sc);
2408 io_req->abts_done = NULL;
2409 goto fnic_device_reset_clean;
2410 }
2411 }
2412 } else {
2413 spin_unlock_irqrestore(io_lock, flags);
2414 }
2415
2416 /* Completed, but not successful, clean up the io_req, return fail */
2417 if (status != FCPIO_SUCCESS) {
2418 spin_lock_irqsave(io_lock, flags);
2419 FNIC_SCSI_DBG(KERN_DEBUG,
2420 fnic->lport->host,
2421 "Device reset completed - failed\n");
2422 io_req = (struct fnic_io_req *)CMD_SP(sc);
2423 goto fnic_device_reset_clean;
2424 }
2425
2426 /*
2427 * Clean up any aborts on this lun that have still not
2428 * completed. If any of these fail, then LUN reset fails.
2429 * clean_pending_aborts cleans all cmds on this lun except
2430 * the lun reset cmd. If all cmds get cleaned, the lun reset
2431 * succeeds
2432 */
2433 if (fnic_clean_pending_aborts(fnic, sc)) {
2434 spin_lock_irqsave(io_lock, flags);
2435 io_req = (struct fnic_io_req *)CMD_SP(sc);
2436 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2437 "Device reset failed"
2438 " since could not abort all IOs\n");
2439 goto fnic_device_reset_clean;
2440 }
2441
2442 /* Clean lun reset command */
2443 spin_lock_irqsave(io_lock, flags);
2444 io_req = (struct fnic_io_req *)CMD_SP(sc);
2445 if (io_req)
2446 /* Completed, and successful */
2447 ret = SUCCESS;
2448
2449 fnic_device_reset_clean:
2450 if (io_req)
2451 CMD_SP(sc) = NULL;
2452
2453 spin_unlock_irqrestore(io_lock, flags);
2454
2455 if (io_req) {
2456 start_time = io_req->start_time;
2457 fnic_release_ioreq_buf(fnic, io_req, sc);
2458 mempool_free(io_req, fnic->io_req_pool);
2459 }
2460
2461 fnic_device_reset_end:
2462 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2463 sc->request->tag, sc,
2464 jiffies_to_msecs(jiffies - start_time),
2465 0, ((u64)sc->cmnd[0] << 32 |
2466 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2467 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2468 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2469
2470 /* free tag if it is allocated */
2471 if (unlikely(tag_gen_flag))
2472 fnic_scsi_host_end_tag(fnic, sc);
2473
2474 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2475 "Returning from device reset %s\n",
2476 (ret == SUCCESS) ?
2477 "SUCCESS" : "FAILED");
2478
2479 if (ret == FAILED)
2480 atomic64_inc(&reset_stats->device_reset_failures);
2481
2482 return ret;
2483 }
2484
2485 /* Clean up all IOs, clean up libFC local port */
2486 int fnic_reset(struct Scsi_Host *shost)
2487 {
2488 struct fc_lport *lp;
2489 struct fnic *fnic;
2490 int ret = 0;
2491 struct reset_stats *reset_stats;
2492
2493 lp = shost_priv(shost);
2494 fnic = lport_priv(lp);
2495 reset_stats = &fnic->fnic_stats.reset_stats;
2496
2497 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2498 "fnic_reset called\n");
2499
2500 atomic64_inc(&reset_stats->fnic_resets);
2501
2502 /*
2503 * Reset local port, this will clean up libFC exchanges,
2504 * reset remote port sessions, and if link is up, begin flogi
2505 */
2506 ret = lp->tt.lport_reset(lp);
2507
2508 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2509 "Returning from fnic reset %s\n",
2510 (ret == 0) ?
2511 "SUCCESS" : "FAILED");
2512
2513 if (ret == 0)
2514 atomic64_inc(&reset_stats->fnic_reset_completions);
2515 else
2516 atomic64_inc(&reset_stats->fnic_reset_failures);
2517
2518 return ret;
2519 }
2520
2521 /*
2522 * SCSI Error handling calls driver's eh_host_reset if all prior
2523 * error handling levels return FAILED. If host reset completes
2524 * successfully, and if link is up, then Fabric login begins.
2525 *
2526 * Host Reset is the highest level of error recovery. If this fails, then
2527 * host is offlined by SCSI.
2528 *
2529 */
2530 int fnic_host_reset(struct scsi_cmnd *sc)
2531 {
2532 int ret;
2533 unsigned long wait_host_tmo;
2534 struct Scsi_Host *shost = sc->device->host;
2535 struct fc_lport *lp = shost_priv(shost);
2536
2537 /*
2538 * If fnic_reset is successful, wait for fabric login to complete
2539 * scsi-ml tries to send a TUR to every device if host reset is
2540 * successful, so before returning to scsi, fabric should be up
2541 */
2542 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2543 if (ret == SUCCESS) {
2544 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2545 ret = FAILED;
2546 while (time_before(jiffies, wait_host_tmo)) {
2547 if ((lp->state == LPORT_ST_READY) &&
2548 (lp->link_up)) {
2549 ret = SUCCESS;
2550 break;
2551 }
2552 ssleep(1);
2553 }
2554 }
2555
2556 return ret;
2557 }
2558
2559 /*
2560 * This fxn is called from libFC when host is removed
2561 */
2562 void fnic_scsi_abort_io(struct fc_lport *lp)
2563 {
2564 int err = 0;
2565 unsigned long flags;
2566 enum fnic_state old_state;
2567 struct fnic *fnic = lport_priv(lp);
2568 DECLARE_COMPLETION_ONSTACK(remove_wait);
2569
2570 /* Issue firmware reset for fnic, wait for reset to complete */
2571 retry_fw_reset:
2572 spin_lock_irqsave(&fnic->fnic_lock, flags);
2573 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2574 /* fw reset is in progress, poll for its completion */
2575 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2576 schedule_timeout(msecs_to_jiffies(100));
2577 goto retry_fw_reset;
2578 }
2579
2580 fnic->remove_wait = &remove_wait;
2581 old_state = fnic->state;
2582 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2583 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2584 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2585
2586 err = fnic_fw_reset_handler(fnic);
2587 if (err) {
2588 spin_lock_irqsave(&fnic->fnic_lock, flags);
2589 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2590 fnic->state = old_state;
2591 fnic->remove_wait = NULL;
2592 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2593 return;
2594 }
2595
2596 /* Wait for firmware reset to complete */
2597 wait_for_completion_timeout(&remove_wait,
2598 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2599
2600 spin_lock_irqsave(&fnic->fnic_lock, flags);
2601 fnic->remove_wait = NULL;
2602 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2603 "fnic_scsi_abort_io %s\n",
2604 (fnic->state == FNIC_IN_ETH_MODE) ?
2605 "SUCCESS" : "FAILED");
2606 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2607
2608 }
2609
2610 /*
2611 * This fxn called from libFC to clean up driver IO state on link down
2612 */
2613 void fnic_scsi_cleanup(struct fc_lport *lp)
2614 {
2615 unsigned long flags;
2616 enum fnic_state old_state;
2617 struct fnic *fnic = lport_priv(lp);
2618
2619 /* issue fw reset */
2620 retry_fw_reset:
2621 spin_lock_irqsave(&fnic->fnic_lock, flags);
2622 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2623 /* fw reset is in progress, poll for its completion */
2624 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2625 schedule_timeout(msecs_to_jiffies(100));
2626 goto retry_fw_reset;
2627 }
2628 old_state = fnic->state;
2629 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2630 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2631 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2632
2633 if (fnic_fw_reset_handler(fnic)) {
2634 spin_lock_irqsave(&fnic->fnic_lock, flags);
2635 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2636 fnic->state = old_state;
2637 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2638 }
2639
2640 }
2641
2642 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2643 {
2644 }
2645
2646 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2647 {
2648 struct fnic *fnic = lport_priv(lp);
2649
2650 /* Non-zero sid, nothing to do */
2651 if (sid)
2652 goto call_fc_exch_mgr_reset;
2653
2654 if (did) {
2655 fnic_rport_exch_reset(fnic, did);
2656 goto call_fc_exch_mgr_reset;
2657 }
2658
2659 /*
2660 * sid = 0, did = 0
2661 * link down or device being removed
2662 */
2663 if (!fnic->in_remove)
2664 fnic_scsi_cleanup(lp);
2665 else
2666 fnic_scsi_abort_io(lp);
2667
2668 /* call libFC exch mgr reset to reset its exchanges */
2669 call_fc_exch_mgr_reset:
2670 fc_exch_mgr_reset(lp, sid, did);
2671
2672 }
2673
2674 /*
2675 * fnic_is_abts_pending() is a helper function that
2676 * walks through tag map to check if there is any IOs pending,if there is one,
2677 * then it returns 1 (true), otherwise 0 (false)
2678 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2679 * otherwise, it checks for all IOs.
2680 */
2681 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2682 {
2683 int tag;
2684 struct fnic_io_req *io_req;
2685 spinlock_t *io_lock;
2686 unsigned long flags;
2687 int ret = 0;
2688 struct scsi_cmnd *sc;
2689 struct scsi_device *lun_dev = NULL;
2690
2691 if (lr_sc)
2692 lun_dev = lr_sc->device;
2693
2694 /* walk again to check, if IOs are still pending in fw */
2695 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2696 sc = scsi_host_find_tag(fnic->lport->host, tag);
2697 /*
2698 * ignore this lun reset cmd or cmds that do not belong to
2699 * this lun
2700 */
2701 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2702 continue;
2703
2704 io_lock = fnic_io_lock_hash(fnic, sc);
2705 spin_lock_irqsave(io_lock, flags);
2706
2707 io_req = (struct fnic_io_req *)CMD_SP(sc);
2708
2709 if (!io_req || sc->device != lun_dev) {
2710 spin_unlock_irqrestore(io_lock, flags);
2711 continue;
2712 }
2713
2714 /*
2715 * Found IO that is still pending with firmware and
2716 * belongs to the LUN that we are resetting
2717 */
2718 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2719 "Found IO in %s on lun\n",
2720 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2721
2722 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2723 ret = 1;
2724 spin_unlock_irqrestore(io_lock, flags);
2725 }
2726
2727 return ret;
2728 }
Linux with added FPC-III support