blob: 10d5c6bbc9e77c5cbf3e577c92bb42fa7994d312 [file] [log] [blame]
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/gfp.h>
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070030#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
42const 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
49static const char *fnic_ioreq_state_str[] = {
Hiral Patel14eb5d92013-02-12 17:01:01 -080050 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070051 [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
57static 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
79const 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
87static 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
96static 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
104static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
105
106static 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
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -0700114static 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
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700120/*
121 * Unmap the data buffer and sense buffer for an io_req,
122 * also unmap and free the device-private scatter/gather list.
123 */
124static 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 */
143static 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
Hiral Patel03298552013-02-12 17:00:58 -0800175/**
176 * __fnic_set_state_flags
177 * Sets/Clears bits in fnic's state_flags
178 **/
179void
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
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700202/*
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
205 */
206int 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
Hiral Patel03298552013-02-12 17:00:58 -0800212 /* indicate fwreset to io path */
213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
214
Joe Eykholt78112e52009-11-03 11:49:22 -0800215 skb_queue_purge(&fnic->frame_queue);
216 skb_queue_purge(&fnic->tx_queue);
217
Hiral Patel03298552013-02-12 17:00:58 -0800218 /* wait for io cmpl */
219 while (atomic_read(&fnic->in_flight))
220 schedule_timeout(msecs_to_jiffies(1));
221
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700222 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;
Hiral Patel67125b02013-09-12 17:45:42 -0700229 else {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
Hiral Patel67125b02013-09-12 17:45:42 -0700231 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 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700238
239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
240
Hiral Patel67125b02013-09-12 17:45:42 -0700241 if (!ret) {
242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
244 "Issued fw reset\n");
Hiral Patel67125b02013-09-12 17:45:42 -0700245 } else {
Hiral Patel03298552013-02-12 17:00:58 -0800246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
248 "Failed to issue fw reset\n");
Hiral Patel03298552013-02-12 17:00:58 -0800249 }
250
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700251 return ret;
252}
253
254
255/*
256 * fnic_flogi_reg_handler
257 * Routine to send flogi register msg to fw
258 */
Joe Eykholt78112e52009-11-03 11:49:22 -0800259int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700260{
261 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
Joe Eykholt78112e52009-11-03 11:49:22 -0800262 enum fcpio_flogi_reg_format_type format;
263 struct fc_lport *lp = fnic->lport;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700264 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
Joe Eykholt78112e52009-11-03 11:49:22 -0800278 if (fnic->ctlr.map_dest) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700279 memset(gw_mac, 0xff, ETH_ALEN);
Joe Eykholt78112e52009-11-03 11:49:22 -0800280 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 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700285
Joe Eykholt78112e52009-11-03 11:49:22 -0800286 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 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700301
Hiral Patel67125b02013-09-12 17:45:42 -0700302 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
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700308flogi_reg_ioreq_end:
309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700310 return ret;
311}
312
313/*
314 * fnic_queue_wq_copy_desc
315 * Routine to enqueue a wq copy desc
316 */
317static 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,
Roel Kluin87a2d342009-06-23 01:06:40 +0200321 int sg_count)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700322{
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;
Hiral Patel67125b02013-09-12 17:45:42 -0700327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700328 unsigned int i;
329 unsigned long intr_flags;
330 int flags;
331 u8 exch_flags;
332 struct scsi_lun fc_lun;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700333
334 if (sg_count) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700335 /* For each SGE, create a device desc entry */
336 desc = io_req->sgl_list;
337 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
338 desc->addr = cpu_to_le64(sg_dma_address(sg));
339 desc->len = cpu_to_le32(sg_dma_len(sg));
340 desc->_resvd = 0;
341 desc++;
342 }
343
344 io_req->sgl_list_pa = pci_map_single
345 (fnic->pdev,
346 io_req->sgl_list,
347 sizeof(io_req->sgl_list[0]) * sg_count,
348 PCI_DMA_TODEVICE);
349 }
350
351 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
352 sc->sense_buffer,
353 SCSI_SENSE_BUFFERSIZE,
354 PCI_DMA_FROMDEVICE);
355
356 int_to_scsilun(sc->device->lun, &fc_lun);
357
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700358 /* Enqueue the descriptor in the Copy WQ */
359 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
360
361 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
362 free_wq_copy_descs(fnic, wq);
363
364 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
365 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800366 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
367 "fnic_queue_wq_copy_desc failure - no descriptors\n");
Hiral Patel67125b02013-09-12 17:45:42 -0700368 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700369 return SCSI_MLQUEUE_HOST_BUSY;
370 }
371
372 flags = 0;
373 if (sc->sc_data_direction == DMA_FROM_DEVICE)
374 flags = FCPIO_ICMND_RDDATA;
375 else if (sc->sc_data_direction == DMA_TO_DEVICE)
376 flags = FCPIO_ICMND_WRDATA;
377
378 exch_flags = 0;
379 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
380 (rp->flags & FC_RP_FLAGS_RETRY))
381 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
382
383 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
384 0, exch_flags, io_req->sgl_cnt,
385 SCSI_SENSE_BUFFERSIZE,
386 io_req->sgl_list_pa,
387 io_req->sense_buf_pa,
388 0, /* scsi cmd ref, always 0 */
Christoph Hellwig50668632014-10-30 14:30:06 +0100389 FCPIO_ICMND_PTA_SIMPLE,
390 /* scsi pri and tag */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700391 flags, /* command flags */
Abhijeet Joglekar4b536622009-10-21 16:28:25 -0700392 sc->cmnd, sc->cmd_len,
393 scsi_bufflen(sc),
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700394 fc_lun.scsi_lun, io_req->port_id,
395 rport->maxframe_size, rp->r_a_tov,
396 rp->e_d_tov);
397
Hiral Patel67125b02013-09-12 17:45:42 -0700398 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
399 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
400 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
401 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
402 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
403
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700404 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
405 return 0;
406}
407
408/*
409 * fnic_queuecommand
410 * Routine to send a scsi cdb
411 * Called with host_lock held and interrupts disabled.
412 */
Jeff Garzikf2812332010-11-16 02:10:29 -0500413static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700414{
Hiral Patel03298552013-02-12 17:00:58 -0800415 struct fc_lport *lp = shost_priv(sc->device->host);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700416 struct fc_rport *rport;
Hiral Patel4d7007b2013-02-12 17:01:02 -0800417 struct fnic_io_req *io_req = NULL;
Hiral Patel03298552013-02-12 17:00:58 -0800418 struct fnic *fnic = lport_priv(lp);
Hiral Patel67125b02013-09-12 17:45:42 -0700419 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700420 struct vnic_wq_copy *wq;
421 int ret;
Hiral Patel4d7007b2013-02-12 17:01:02 -0800422 u64 cmd_trace;
423 int sg_count = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700424 unsigned long flags;
425 unsigned long ptr;
426
Hiral Patel03298552013-02-12 17:00:58 -0800427 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
428 return SCSI_MLQUEUE_HOST_BUSY;
429
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700430 rport = starget_to_rport(scsi_target(sc->device));
431 ret = fc_remote_port_chkready(rport);
432 if (ret) {
Hiral Patel67125b02013-09-12 17:45:42 -0700433 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700434 sc->result = ret;
435 done(sc);
436 return 0;
437 }
438
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700439 if (lp->state != LPORT_ST_READY || !(lp->link_up))
440 return SCSI_MLQUEUE_HOST_BUSY;
441
Hiral Patel03298552013-02-12 17:00:58 -0800442 atomic_inc(&fnic->in_flight);
443
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700444 /*
445 * Release host lock, use driver resource specific locks from here.
446 * Don't re-enable interrupts in case they were disabled prior to the
447 * caller disabling them.
448 */
449 spin_unlock(lp->host->host_lock);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800450 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
451 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700452
453 /* Get a new io_req for this SCSI IO */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700454 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
455 if (!io_req) {
Hiral Patel67125b02013-09-12 17:45:42 -0700456 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700457 ret = SCSI_MLQUEUE_HOST_BUSY;
458 goto out;
459 }
460 memset(io_req, 0, sizeof(*io_req));
461
462 /* Map the data buffer */
463 sg_count = scsi_dma_map(sc);
464 if (sg_count < 0) {
Hiral Patel4d7007b2013-02-12 17:01:02 -0800465 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
466 sc->request->tag, sc, 0, sc->cmnd[0],
467 sg_count, CMD_STATE(sc));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700468 mempool_free(io_req, fnic->io_req_pool);
469 goto out;
470 }
471
472 /* Determine the type of scatter/gather list we need */
473 io_req->sgl_cnt = sg_count;
474 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
475 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
476 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
477
478 if (sg_count) {
479 io_req->sgl_list =
480 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
Abhijeet Joglekar0c79c742011-06-13 21:21:01 -0700481 GFP_ATOMIC);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700482 if (!io_req->sgl_list) {
Hiral Patel67125b02013-09-12 17:45:42 -0700483 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700484 ret = SCSI_MLQUEUE_HOST_BUSY;
485 scsi_dma_unmap(sc);
486 mempool_free(io_req, fnic->io_req_pool);
487 goto out;
488 }
489
490 /* Cache sgl list allocated address before alignment */
491 io_req->sgl_list_alloc = io_req->sgl_list;
492 ptr = (unsigned long) io_req->sgl_list;
493 if (ptr % FNIC_SG_DESC_ALIGN) {
494 io_req->sgl_list = (struct host_sg_desc *)
495 (((unsigned long) ptr
496 + FNIC_SG_DESC_ALIGN - 1)
497 & ~(FNIC_SG_DESC_ALIGN - 1));
498 }
499 }
500
501 /* initialize rest of io_req */
502 io_req->port_id = rport->port_id;
Hiral Patel14eb5d92013-02-12 17:01:01 -0800503 io_req->start_time = jiffies;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700504 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
505 CMD_SP(sc) = (char *)io_req;
Hiral Patel14eb5d92013-02-12 17:01:01 -0800506 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700507 sc->scsi_done = done;
508
509 /* create copy wq desc and enqueue it */
510 wq = &fnic->wq_copy[0];
511 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
512 if (ret) {
513 /*
514 * In case another thread cancelled the request,
515 * refetch the pointer under the lock.
516 */
517 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
Hiral Patel4d7007b2013-02-12 17:01:02 -0800518 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
519 sc->request->tag, sc, 0, 0, 0,
520 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700521 spin_lock_irqsave(io_lock, flags);
522 io_req = (struct fnic_io_req *)CMD_SP(sc);
523 CMD_SP(sc) = NULL;
524 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
525 spin_unlock_irqrestore(io_lock, flags);
526 if (io_req) {
527 fnic_release_ioreq_buf(fnic, io_req, sc);
528 mempool_free(io_req, fnic->io_req_pool);
529 }
Hiral Patel14eb5d92013-02-12 17:01:01 -0800530 } else {
Hiral Patel67125b02013-09-12 17:45:42 -0700531 atomic64_inc(&fnic_stats->io_stats.active_ios);
532 atomic64_inc(&fnic_stats->io_stats.num_ios);
533 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
534 atomic64_read(&fnic_stats->io_stats.max_active_ios))
535 atomic64_set(&fnic_stats->io_stats.max_active_ios,
536 atomic64_read(&fnic_stats->io_stats.active_ios));
537
Hiral Patel14eb5d92013-02-12 17:01:01 -0800538 /* REVISIT: Use per IO lock in the final code */
539 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700540 }
541out:
Hiral Patel4d7007b2013-02-12 17:01:02 -0800542 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
543 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
544 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
545 sc->cmnd[5]);
546
547 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
548 sc->request->tag, sc, io_req,
549 sg_count, cmd_trace,
550 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
Hiral Patel03298552013-02-12 17:00:58 -0800551 atomic_dec(&fnic->in_flight);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700552 /* acquire host lock before returning to SCSI */
553 spin_lock(lp->host->host_lock);
554 return ret;
555}
556
Jeff Garzikf2812332010-11-16 02:10:29 -0500557DEF_SCSI_QCMD(fnic_queuecommand)
558
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700559/*
560 * fnic_fcpio_fw_reset_cmpl_handler
561 * Routine to handle fw reset completion
562 */
563static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
564 struct fcpio_fw_req *desc)
565{
566 u8 type;
567 u8 hdr_status;
568 struct fcpio_tag tag;
569 int ret = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700570 unsigned long flags;
Hiral Patel67125b02013-09-12 17:45:42 -0700571 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700572
573 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
574
Hiral Patel67125b02013-09-12 17:45:42 -0700575 atomic64_inc(&reset_stats->fw_reset_completions);
576
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700577 /* Clean up all outstanding io requests */
578 fnic_cleanup_io(fnic, SCSI_NO_TAG);
579
Hiral Patel67125b02013-09-12 17:45:42 -0700580 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
581 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
582
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700583 spin_lock_irqsave(&fnic->fnic_lock, flags);
584
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700585 /* fnic should be in FC_TRANS_ETH_MODE */
586 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
587 /* Check status of reset completion */
588 if (!hdr_status) {
589 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
590 "reset cmpl success\n");
591 /* Ready to send flogi out */
592 fnic->state = FNIC_IN_ETH_MODE;
593 } else {
594 FNIC_SCSI_DBG(KERN_DEBUG,
595 fnic->lport->host,
596 "fnic fw_reset : failed %s\n",
597 fnic_fcpio_status_to_str(hdr_status));
598
599 /*
600 * Unable to change to eth mode, cannot send out flogi
601 * Change state to fc mode, so that subsequent Flogi
602 * requests from libFC will cause more attempts to
603 * reset the firmware. Free the cached flogi
604 */
605 fnic->state = FNIC_IN_FC_MODE;
Hiral Patel67125b02013-09-12 17:45:42 -0700606 atomic64_inc(&reset_stats->fw_reset_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700607 ret = -1;
608 }
609 } else {
610 FNIC_SCSI_DBG(KERN_DEBUG,
611 fnic->lport->host,
612 "Unexpected state %s while processing"
613 " reset cmpl\n", fnic_state_to_str(fnic->state));
Hiral Patel67125b02013-09-12 17:45:42 -0700614 atomic64_inc(&reset_stats->fw_reset_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700615 ret = -1;
616 }
617
618 /* Thread removing device blocks till firmware reset is complete */
619 if (fnic->remove_wait)
620 complete(fnic->remove_wait);
621
622 /*
623 * If fnic is being removed, or fw reset failed
624 * free the flogi frame. Else, send it out
625 */
626 if (fnic->remove_wait || ret) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700627 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
Joe Eykholt78112e52009-11-03 11:49:22 -0800628 skb_queue_purge(&fnic->tx_queue);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700629 goto reset_cmpl_handler_end;
630 }
631
632 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
633
Joe Eykholt78112e52009-11-03 11:49:22 -0800634 fnic_flush_tx(fnic);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700635
636 reset_cmpl_handler_end:
Hiral Patel03298552013-02-12 17:00:58 -0800637 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
638
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700639 return ret;
640}
641
642/*
643 * fnic_fcpio_flogi_reg_cmpl_handler
644 * Routine to handle flogi register completion
645 */
646static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
647 struct fcpio_fw_req *desc)
648{
649 u8 type;
650 u8 hdr_status;
651 struct fcpio_tag tag;
652 int ret = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700653 unsigned long flags;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700654
655 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
656
657 /* Update fnic state based on status of flogi reg completion */
658 spin_lock_irqsave(&fnic->fnic_lock, flags);
659
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700660 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
661
662 /* Check flogi registration completion status */
663 if (!hdr_status) {
664 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
665 "flog reg succeeded\n");
666 fnic->state = FNIC_IN_FC_MODE;
667 } else {
668 FNIC_SCSI_DBG(KERN_DEBUG,
669 fnic->lport->host,
670 "fnic flogi reg :failed %s\n",
671 fnic_fcpio_status_to_str(hdr_status));
672 fnic->state = FNIC_IN_ETH_MODE;
673 ret = -1;
674 }
675 } else {
676 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
677 "Unexpected fnic state %s while"
678 " processing flogi reg completion\n",
679 fnic_state_to_str(fnic->state));
680 ret = -1;
681 }
682
Joe Eykholt78112e52009-11-03 11:49:22 -0800683 if (!ret) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700684 if (fnic->stop_rx_link_events) {
685 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
686 goto reg_cmpl_handler_end;
687 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700688 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
689
Joe Eykholt78112e52009-11-03 11:49:22 -0800690 fnic_flush_tx(fnic);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700691 queue_work(fnic_event_queue, &fnic->frame_work);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700692 } else {
693 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700694 }
695
696reg_cmpl_handler_end:
697 return ret;
698}
699
700static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
701 u16 request_out)
702{
703 if (wq->to_clean_index <= wq->to_use_index) {
704 /* out of range, stale request_out index */
705 if (request_out < wq->to_clean_index ||
706 request_out >= wq->to_use_index)
707 return 0;
708 } else {
709 /* out of range, stale request_out index */
710 if (request_out < wq->to_clean_index &&
711 request_out >= wq->to_use_index)
712 return 0;
713 }
714 /* request_out index is in range */
715 return 1;
716}
717
718
719/*
720 * Mark that ack received and store the Ack index. If there are multiple
721 * acks received before Tx thread cleans it up, the latest value will be
722 * used which is correct behavior. This state should be in the copy Wq
723 * instead of in the fnic
724 */
725static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
726 unsigned int cq_index,
727 struct fcpio_fw_req *desc)
728{
729 struct vnic_wq_copy *wq;
730 u16 request_out = desc->u.ack.request_out;
731 unsigned long flags;
Hiral Patel4d7007b2013-02-12 17:01:02 -0800732 u64 *ox_id_tag = (u64 *)(void *)desc;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700733
734 /* mark the ack state */
735 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
736 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
737
Hiral Patel67125b02013-09-12 17:45:42 -0700738 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700739 if (is_ack_index_in_range(wq, request_out)) {
740 fnic->fw_ack_index[0] = request_out;
741 fnic->fw_ack_recd[0] = 1;
Hiral Patel67125b02013-09-12 17:45:42 -0700742 } else
743 atomic64_inc(
744 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
745
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700746 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
Hiral Patel4d7007b2013-02-12 17:01:02 -0800747 FNIC_TRACE(fnic_fcpio_ack_handler,
748 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
749 ox_id_tag[4], ox_id_tag[5]);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700750}
751
752/*
753 * fnic_fcpio_icmnd_cmpl_handler
754 * Routine to handle icmnd completions
755 */
756static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
757 struct fcpio_fw_req *desc)
758{
759 u8 type;
760 u8 hdr_status;
761 struct fcpio_tag tag;
762 u32 id;
763 u64 xfer_len = 0;
764 struct fcpio_icmnd_cmpl *icmnd_cmpl;
765 struct fnic_io_req *io_req;
766 struct scsi_cmnd *sc;
Hiral Patel67125b02013-09-12 17:45:42 -0700767 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700768 unsigned long flags;
769 spinlock_t *io_lock;
Hiral Patel4d7007b2013-02-12 17:01:02 -0800770 u64 cmd_trace;
Hiral Patel14eb5d92013-02-12 17:01:01 -0800771 unsigned long start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700772
773 /* Decode the cmpl description to get the io_req id */
774 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
775 fcpio_tag_id_dec(&tag, &id);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800776 icmnd_cmpl = &desc->u.icmnd_cmpl;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700777
Hiral Patelfc857992013-09-09 13:31:51 -0700778 if (id >= fnic->fnic_max_tag_id) {
Hiral Patel03298552013-02-12 17:00:58 -0800779 shost_printk(KERN_ERR, fnic->lport->host,
780 "Tag out of range tag %x hdr status = %s\n",
781 id, fnic_fcpio_status_to_str(hdr_status));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700782 return;
Hiral Patel03298552013-02-12 17:00:58 -0800783 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700784
785 sc = scsi_host_find_tag(fnic->lport->host, id);
786 WARN_ON_ONCE(!sc);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800787 if (!sc) {
Hiral Patel67125b02013-09-12 17:45:42 -0700788 atomic64_inc(&fnic_stats->io_stats.sc_null);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800789 shost_printk(KERN_ERR, fnic->lport->host,
790 "icmnd_cmpl sc is null - "
791 "hdr status = %s tag = 0x%x desc = 0x%p\n",
792 fnic_fcpio_status_to_str(hdr_status), id, desc);
Hiral Patel4d7007b2013-02-12 17:01:02 -0800793 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
794 fnic->lport->host->host_no, id,
795 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
796 (u64)icmnd_cmpl->_resvd0[0]),
797 ((u64)hdr_status << 16 |
798 (u64)icmnd_cmpl->scsi_status << 8 |
799 (u64)icmnd_cmpl->flags), desc,
800 (u64)icmnd_cmpl->residual, 0);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700801 return;
Hiral Patel14eb5d92013-02-12 17:01:01 -0800802 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700803
804 io_lock = fnic_io_lock_hash(fnic, sc);
805 spin_lock_irqsave(io_lock, flags);
806 io_req = (struct fnic_io_req *)CMD_SP(sc);
807 WARN_ON_ONCE(!io_req);
808 if (!io_req) {
Hiral Patel67125b02013-09-12 17:45:42 -0700809 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800810 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700811 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800812 shost_printk(KERN_ERR, fnic->lport->host,
813 "icmnd_cmpl io_req is null - "
814 "hdr status = %s tag = 0x%x sc 0x%p\n",
815 fnic_fcpio_status_to_str(hdr_status), id, sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700816 return;
817 }
Hiral Patel14eb5d92013-02-12 17:01:01 -0800818 start_time = io_req->start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700819
820 /* firmware completed the io */
821 io_req->io_completed = 1;
822
823 /*
824 * if SCSI-ML has already issued abort on this command,
825 * ignore completion of the IO. The abts path will clean it up
826 */
827 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
828 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -0800829 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
830 switch (hdr_status) {
831 case FCPIO_SUCCESS:
832 CMD_FLAGS(sc) |= FNIC_IO_DONE;
833 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
834 "icmnd_cmpl ABTS pending hdr status = %s "
835 "sc 0x%p scsi_status %x residual %d\n",
836 fnic_fcpio_status_to_str(hdr_status), sc,
837 icmnd_cmpl->scsi_status,
838 icmnd_cmpl->residual);
839 break;
840 case FCPIO_ABORTED:
841 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
842 break;
843 default:
844 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
845 "icmnd_cmpl abts pending "
846 "hdr status = %s tag = 0x%x sc = 0x%p\n",
847 fnic_fcpio_status_to_str(hdr_status),
848 id, sc);
849 break;
850 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700851 return;
852 }
853
854 /* Mark the IO as complete */
855 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
856
857 icmnd_cmpl = &desc->u.icmnd_cmpl;
858
859 switch (hdr_status) {
860 case FCPIO_SUCCESS:
861 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
862 xfer_len = scsi_bufflen(sc);
863 scsi_set_resid(sc, icmnd_cmpl->residual);
864
865 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
866 xfer_len -= icmnd_cmpl->residual;
867
Hiral Patel67125b02013-09-12 17:45:42 -0700868 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
869 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700870 break;
871
872 case FCPIO_TIMEOUT: /* request was timed out */
Hiral Patel67125b02013-09-12 17:45:42 -0700873 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700874 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
875 break;
876
877 case FCPIO_ABORTED: /* request was aborted */
Hiral Patel67125b02013-09-12 17:45:42 -0700878 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700879 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
880 break;
881
882 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
Hiral Patel67125b02013-09-12 17:45:42 -0700883 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700884 scsi_set_resid(sc, icmnd_cmpl->residual);
885 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
886 break;
887
888 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
Hiral Patel67125b02013-09-12 17:45:42 -0700889 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700890 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
891 break;
Hiral Patel67125b02013-09-12 17:45:42 -0700892
893 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
894 atomic64_inc(&fnic_stats->io_stats.io_not_found);
895 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
896 break;
897
898 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
899 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
900 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
901 break;
902
903 case FCPIO_FW_ERR: /* request was terminated due fw error */
904 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
905 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
906 break;
907
908 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
909 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
910 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
911 break;
912
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700913 case FCPIO_INVALID_HEADER: /* header contains invalid data */
914 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
915 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700916 default:
917 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
918 fnic_fcpio_status_to_str(hdr_status));
919 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
920 break;
921 }
922
Hiral Patel67125b02013-09-12 17:45:42 -0700923 if (hdr_status != FCPIO_SUCCESS) {
924 atomic64_inc(&fnic_stats->io_stats.io_failures);
925 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
926 fnic_fcpio_status_to_str(hdr_status));
927 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700928 /* Break link with the SCSI command */
929 CMD_SP(sc) = NULL;
Hiral Patel14eb5d92013-02-12 17:01:01 -0800930 CMD_FLAGS(sc) |= FNIC_IO_DONE;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700931
932 spin_unlock_irqrestore(io_lock, flags);
933
934 fnic_release_ioreq_buf(fnic, io_req, sc);
935
936 mempool_free(io_req, fnic->io_req_pool);
937
Hiral Patel4d7007b2013-02-12 17:01:02 -0800938 cmd_trace = ((u64)hdr_status << 56) |
939 (u64)icmnd_cmpl->scsi_status << 48 |
940 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
941 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
942 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
943
944 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
945 sc->device->host->host_no, id, sc,
946 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
947 (u64)icmnd_cmpl->_resvd0[0] << 48 |
948 jiffies_to_msecs(jiffies - start_time)),
949 desc, cmd_trace,
950 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
951
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700952 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
953 fnic->lport->host_stats.fcp_input_requests++;
954 fnic->fcp_input_bytes += xfer_len;
955 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
956 fnic->lport->host_stats.fcp_output_requests++;
957 fnic->fcp_output_bytes += xfer_len;
958 } else
959 fnic->lport->host_stats.fcp_control_requests++;
960
Hiral Patel67125b02013-09-12 17:45:42 -0700961 atomic64_dec(&fnic_stats->io_stats.active_ios);
962 if (atomic64_read(&fnic->io_cmpl_skip))
963 atomic64_dec(&fnic->io_cmpl_skip);
964 else
965 atomic64_inc(&fnic_stats->io_stats.io_completions);
966
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700967 /* Call SCSI completion function to complete the IO */
968 if (sc->scsi_done)
969 sc->scsi_done(sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700970}
971
972/* fnic_fcpio_itmf_cmpl_handler
973 * Routine to handle itmf completions
974 */
975static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
976 struct fcpio_fw_req *desc)
977{
978 u8 type;
979 u8 hdr_status;
980 struct fcpio_tag tag;
981 u32 id;
982 struct scsi_cmnd *sc;
983 struct fnic_io_req *io_req;
Hiral Patel67125b02013-09-12 17:45:42 -0700984 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
985 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
986 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
987 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700988 unsigned long flags;
989 spinlock_t *io_lock;
Hiral Patel14eb5d92013-02-12 17:01:01 -0800990 unsigned long start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700991
992 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
993 fcpio_tag_id_dec(&tag, &id);
994
Hiral Patelfc857992013-09-09 13:31:51 -0700995 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
Hiral Patel03298552013-02-12 17:00:58 -0800996 shost_printk(KERN_ERR, fnic->lport->host,
997 "Tag out of range tag %x hdr status = %s\n",
998 id, fnic_fcpio_status_to_str(hdr_status));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700999 return;
Hiral Patel03298552013-02-12 17:00:58 -08001000 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001001
1002 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1003 WARN_ON_ONCE(!sc);
Hiral Patel14eb5d92013-02-12 17:01:01 -08001004 if (!sc) {
Hiral Patel67125b02013-09-12 17:45:42 -07001005 atomic64_inc(&fnic_stats->io_stats.sc_null);
Hiral Patel14eb5d92013-02-12 17:01:01 -08001006 shost_printk(KERN_ERR, fnic->lport->host,
1007 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1008 fnic_fcpio_status_to_str(hdr_status), id);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001009 return;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001010 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001011 io_lock = fnic_io_lock_hash(fnic, sc);
1012 spin_lock_irqsave(io_lock, flags);
1013 io_req = (struct fnic_io_req *)CMD_SP(sc);
1014 WARN_ON_ONCE(!io_req);
1015 if (!io_req) {
Hiral Patel67125b02013-09-12 17:45:42 -07001016 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001017 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -08001018 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1019 shost_printk(KERN_ERR, fnic->lport->host,
1020 "itmf_cmpl io_req is null - "
1021 "hdr status = %s tag = 0x%x sc 0x%p\n",
1022 fnic_fcpio_status_to_str(hdr_status), id, sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001023 return;
1024 }
Hiral Patel14eb5d92013-02-12 17:01:01 -08001025 start_time = io_req->start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001026
Hiral Patel03298552013-02-12 17:00:58 -08001027 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1028 /* Abort and terminate completion of device reset req */
1029 /* REVISIT : Add asserts about various flags */
1030 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1031 "dev reset abts cmpl recd. id %x status %s\n",
1032 id, fnic_fcpio_status_to_str(hdr_status));
1033 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1034 CMD_ABTS_STATUS(sc) = hdr_status;
1035 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1036 if (io_req->abts_done)
1037 complete(io_req->abts_done);
1038 spin_unlock_irqrestore(io_lock, flags);
1039 } else if (id & FNIC_TAG_ABORT) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001040 /* Completion of abort cmd */
Hiral Patel67125b02013-09-12 17:45:42 -07001041 switch (hdr_status) {
1042 case FCPIO_SUCCESS:
1043 break;
1044 case FCPIO_TIMEOUT:
1045 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1046 atomic64_inc(&abts_stats->abort_fw_timeouts);
1047 else
1048 atomic64_inc(
1049 &term_stats->terminate_fw_timeouts);
1050 break;
1051 case FCPIO_IO_NOT_FOUND:
1052 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1053 atomic64_inc(&abts_stats->abort_io_not_found);
1054 else
1055 atomic64_inc(
1056 &term_stats->terminate_io_not_found);
1057 break;
1058 default:
1059 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1060 atomic64_inc(&abts_stats->abort_failures);
1061 else
1062 atomic64_inc(
1063 &term_stats->terminate_failures);
1064 break;
1065 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001066 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1067 /* This is a late completion. Ignore it */
1068 spin_unlock_irqrestore(io_lock, flags);
1069 return;
1070 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001071 CMD_ABTS_STATUS(sc) = hdr_status;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001072 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
Hiral Patel67125b02013-09-12 17:45:42 -07001073
1074 atomic64_dec(&fnic_stats->io_stats.active_ios);
1075 if (atomic64_read(&fnic->io_cmpl_skip))
1076 atomic64_dec(&fnic->io_cmpl_skip);
1077 else
1078 atomic64_inc(&fnic_stats->io_stats.io_completions);
1079
1080 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1081 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1082
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001083 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1084 "abts cmpl recd. id %d status %s\n",
1085 (int)(id & FNIC_TAG_MASK),
1086 fnic_fcpio_status_to_str(hdr_status));
1087
1088 /*
1089 * If scsi_eh thread is blocked waiting for abts to complete,
1090 * signal completion to it. IO will be cleaned in the thread
1091 * else clean it in this context
1092 */
1093 if (io_req->abts_done) {
1094 complete(io_req->abts_done);
1095 spin_unlock_irqrestore(io_lock, flags);
1096 } else {
1097 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1098 "abts cmpl, completing IO\n");
1099 CMD_SP(sc) = NULL;
1100 sc->result = (DID_ERROR << 16);
1101
1102 spin_unlock_irqrestore(io_lock, flags);
1103
1104 fnic_release_ioreq_buf(fnic, io_req, sc);
1105 mempool_free(io_req, fnic->io_req_pool);
Hiral Patel4d7007b2013-02-12 17:01:02 -08001106 if (sc->scsi_done) {
1107 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1108 sc->device->host->host_no, id,
1109 sc,
1110 jiffies_to_msecs(jiffies - start_time),
1111 desc,
1112 (((u64)hdr_status << 40) |
1113 (u64)sc->cmnd[0] << 32 |
1114 (u64)sc->cmnd[2] << 24 |
1115 (u64)sc->cmnd[3] << 16 |
1116 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1117 (((u64)CMD_FLAGS(sc) << 32) |
1118 CMD_STATE(sc)));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001119 sc->scsi_done(sc);
Hiral Patel4d7007b2013-02-12 17:01:02 -08001120 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001121 }
1122
1123 } else if (id & FNIC_TAG_DEV_RST) {
1124 /* Completion of device reset */
1125 CMD_LR_STATUS(sc) = hdr_status;
Hiral Patel03298552013-02-12 17:00:58 -08001126 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1127 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -08001128 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
Hiral Patel4d7007b2013-02-12 17:01:02 -08001129 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1130 sc->device->host->host_no, id, sc,
1131 jiffies_to_msecs(jiffies - start_time),
1132 desc, 0,
1133 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
Hiral Patel03298552013-02-12 17:00:58 -08001134 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1135 "Terminate pending "
1136 "dev reset cmpl recd. id %d status %s\n",
1137 (int)(id & FNIC_TAG_MASK),
1138 fnic_fcpio_status_to_str(hdr_status));
1139 return;
1140 }
1141 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1142 /* Need to wait for terminate completion */
1143 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel4d7007b2013-02-12 17:01:02 -08001144 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1145 sc->device->host->host_no, id, sc,
1146 jiffies_to_msecs(jiffies - start_time),
1147 desc, 0,
1148 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
Hiral Patel03298552013-02-12 17:00:58 -08001149 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1150 "dev reset cmpl recd after time out. "
1151 "id %d status %s\n",
1152 (int)(id & FNIC_TAG_MASK),
1153 fnic_fcpio_status_to_str(hdr_status));
1154 return;
1155 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001156 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
Hiral Patel03298552013-02-12 17:00:58 -08001157 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001158 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1159 "dev reset cmpl recd. id %d status %s\n",
1160 (int)(id & FNIC_TAG_MASK),
1161 fnic_fcpio_status_to_str(hdr_status));
1162 if (io_req->dr_done)
1163 complete(io_req->dr_done);
1164 spin_unlock_irqrestore(io_lock, flags);
1165
1166 } else {
1167 shost_printk(KERN_ERR, fnic->lport->host,
1168 "Unexpected itmf io state %s tag %x\n",
1169 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1170 spin_unlock_irqrestore(io_lock, flags);
1171 }
1172
1173}
1174
1175/*
1176 * fnic_fcpio_cmpl_handler
1177 * Routine to service the cq for wq_copy
1178 */
1179static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1180 unsigned int cq_index,
1181 struct fcpio_fw_req *desc)
1182{
1183 struct fnic *fnic = vnic_dev_priv(vdev);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001184
1185 switch (desc->hdr.type) {
Hiral Patel67125b02013-09-12 17:45:42 -07001186 case FCPIO_ICMND_CMPL: /* fw completed a command */
1187 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1188 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1189 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1190 case FCPIO_RESET_CMPL: /* fw completed reset */
1191 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1192 break;
1193 default:
1194 break;
1195 }
1196
1197 switch (desc->hdr.type) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001198 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1199 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1200 break;
1201
1202 case FCPIO_ICMND_CMPL: /* fw completed a command */
1203 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1204 break;
1205
1206 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1207 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1208 break;
1209
1210 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
Joe Eykholt78112e52009-11-03 11:49:22 -08001211 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
Hiral Patel03298552013-02-12 17:00:58 -08001212 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001213 break;
1214
1215 case FCPIO_RESET_CMPL: /* fw completed reset */
Hiral Patel03298552013-02-12 17:00:58 -08001216 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001217 break;
1218
1219 default:
1220 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1221 "firmware completion type %d\n",
1222 desc->hdr.type);
1223 break;
1224 }
1225
Hiral Patel03298552013-02-12 17:00:58 -08001226 return 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001227}
1228
1229/*
1230 * fnic_wq_copy_cmpl_handler
1231 * Routine to process wq copy
1232 */
1233int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1234{
1235 unsigned int wq_work_done = 0;
1236 unsigned int i, cq_index;
1237 unsigned int cur_work_done;
1238
1239 for (i = 0; i < fnic->wq_copy_count; i++) {
1240 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1241 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1242 fnic_fcpio_cmpl_handler,
1243 copy_work_to_do);
1244 wq_work_done += cur_work_done;
1245 }
1246 return wq_work_done;
1247}
1248
1249static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1250{
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001251 int i;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001252 struct fnic_io_req *io_req;
1253 unsigned long flags = 0;
1254 struct scsi_cmnd *sc;
1255 spinlock_t *io_lock;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001256 unsigned long start_time = 0;
Hiral Patel67125b02013-09-12 17:45:42 -07001257 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001258
Hiral Patelfc857992013-09-09 13:31:51 -07001259 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001260 if (i == exclude_id)
1261 continue;
1262
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001263 io_lock = fnic_io_lock_tag(fnic, i);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001264 spin_lock_irqsave(io_lock, flags);
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001265 sc = scsi_host_find_tag(fnic->lport->host, i);
1266 if (!sc) {
1267 spin_unlock_irqrestore(io_lock, flags);
1268 continue;
1269 }
1270
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001271 io_req = (struct fnic_io_req *)CMD_SP(sc);
Hiral Patel03298552013-02-12 17:00:58 -08001272 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1273 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1274 /*
1275 * We will be here only when FW completes reset
1276 * without sending completions for outstanding ios.
1277 */
1278 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1279 if (io_req && io_req->dr_done)
1280 complete(io_req->dr_done);
1281 else if (io_req && io_req->abts_done)
1282 complete(io_req->abts_done);
1283 spin_unlock_irqrestore(io_lock, flags);
1284 continue;
1285 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1286 spin_unlock_irqrestore(io_lock, flags);
1287 continue;
1288 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001289 if (!io_req) {
1290 spin_unlock_irqrestore(io_lock, flags);
1291 goto cleanup_scsi_cmd;
1292 }
1293
1294 CMD_SP(sc) = NULL;
1295
1296 spin_unlock_irqrestore(io_lock, flags);
1297
1298 /*
1299 * If there is a scsi_cmnd associated with this io_req, then
1300 * free the corresponding state
1301 */
Hiral Patel14eb5d92013-02-12 17:01:01 -08001302 start_time = io_req->start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001303 fnic_release_ioreq_buf(fnic, io_req, sc);
1304 mempool_free(io_req, fnic->io_req_pool);
1305
1306cleanup_scsi_cmd:
1307 sc->result = DID_TRANSPORT_DISRUPTED << 16;
Hiral Shah66818662014-04-18 12:28:18 -07001308 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1309 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n",
1310 __func__, (jiffies - start_time));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001311
Hiral Patel67125b02013-09-12 17:45:42 -07001312 if (atomic64_read(&fnic->io_cmpl_skip))
1313 atomic64_dec(&fnic->io_cmpl_skip);
1314 else
1315 atomic64_inc(&fnic_stats->io_stats.io_completions);
1316
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001317 /* Complete the command to SCSI */
Hiral Patel4d7007b2013-02-12 17:01:02 -08001318 if (sc->scsi_done) {
1319 FNIC_TRACE(fnic_cleanup_io,
1320 sc->device->host->host_no, i, sc,
1321 jiffies_to_msecs(jiffies - start_time),
1322 0, ((u64)sc->cmnd[0] << 32 |
1323 (u64)sc->cmnd[2] << 24 |
1324 (u64)sc->cmnd[3] << 16 |
1325 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1326 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1327
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001328 sc->scsi_done(sc);
Hiral Patel4d7007b2013-02-12 17:01:02 -08001329 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001330 }
1331}
1332
1333void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1334 struct fcpio_host_req *desc)
1335{
1336 u32 id;
1337 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1338 struct fnic_io_req *io_req;
1339 struct scsi_cmnd *sc;
1340 unsigned long flags;
1341 spinlock_t *io_lock;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001342 unsigned long start_time = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001343
1344 /* get the tag reference */
1345 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1346 id &= FNIC_TAG_MASK;
1347
Hiral Patelfc857992013-09-09 13:31:51 -07001348 if (id >= fnic->fnic_max_tag_id)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001349 return;
1350
1351 sc = scsi_host_find_tag(fnic->lport->host, id);
1352 if (!sc)
1353 return;
1354
1355 io_lock = fnic_io_lock_hash(fnic, sc);
1356 spin_lock_irqsave(io_lock, flags);
1357
1358 /* Get the IO context which this desc refers to */
1359 io_req = (struct fnic_io_req *)CMD_SP(sc);
1360
1361 /* fnic interrupts are turned off by now */
1362
1363 if (!io_req) {
1364 spin_unlock_irqrestore(io_lock, flags);
1365 goto wq_copy_cleanup_scsi_cmd;
1366 }
1367
1368 CMD_SP(sc) = NULL;
1369
1370 spin_unlock_irqrestore(io_lock, flags);
1371
Hiral Patel14eb5d92013-02-12 17:01:01 -08001372 start_time = io_req->start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001373 fnic_release_ioreq_buf(fnic, io_req, sc);
1374 mempool_free(io_req, fnic->io_req_pool);
1375
1376wq_copy_cleanup_scsi_cmd:
1377 sc->result = DID_NO_CONNECT << 16;
1378 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1379 " DID_NO_CONNECT\n");
1380
Hiral Patel4d7007b2013-02-12 17:01:02 -08001381 if (sc->scsi_done) {
1382 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1383 sc->device->host->host_no, id, sc,
1384 jiffies_to_msecs(jiffies - start_time),
1385 0, ((u64)sc->cmnd[0] << 32 |
1386 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1387 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1388 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1389
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001390 sc->scsi_done(sc);
Hiral Patel4d7007b2013-02-12 17:01:02 -08001391 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001392}
1393
1394static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1395 u32 task_req, u8 *fc_lun,
1396 struct fnic_io_req *io_req)
1397{
1398 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
Hiral Patel03298552013-02-12 17:00:58 -08001399 struct Scsi_Host *host = fnic->lport->host;
Hiral Patel67125b02013-09-12 17:45:42 -07001400 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001401 unsigned long flags;
1402
Hiral Patel03298552013-02-12 17:00:58 -08001403 spin_lock_irqsave(host->host_lock, flags);
1404 if (unlikely(fnic_chk_state_flags_locked(fnic,
1405 FNIC_FLAGS_IO_BLOCKED))) {
1406 spin_unlock_irqrestore(host->host_lock, flags);
1407 return 1;
1408 } else
1409 atomic_inc(&fnic->in_flight);
1410 spin_unlock_irqrestore(host->host_lock, flags);
1411
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001412 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1413
1414 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1415 free_wq_copy_descs(fnic, wq);
1416
1417 if (!vnic_wq_copy_desc_avail(wq)) {
1418 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
Hiral Patel03298552013-02-12 17:00:58 -08001419 atomic_dec(&fnic->in_flight);
Hiral Patel14eb5d92013-02-12 17:01:01 -08001420 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
Hiral Patel03298552013-02-12 17:00:58 -08001421 "fnic_queue_abort_io_req: failure: no descriptors\n");
Hiral Patel67125b02013-09-12 17:45:42 -07001422 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001423 return 1;
1424 }
1425 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1426 0, task_req, tag, fc_lun, io_req->port_id,
1427 fnic->config.ra_tov, fnic->config.ed_tov);
1428
Hiral Patel67125b02013-09-12 17:45:42 -07001429 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1430 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1431 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1432 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1433 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1434
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001435 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
Hiral Patel03298552013-02-12 17:00:58 -08001436 atomic_dec(&fnic->in_flight);
1437
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001438 return 0;
1439}
1440
Hiral Patel03298552013-02-12 17:00:58 -08001441static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001442{
1443 int tag;
Hiral Patel03298552013-02-12 17:00:58 -08001444 int abt_tag;
Hiral Patel67125b02013-09-12 17:45:42 -07001445 int term_cnt = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001446 struct fnic_io_req *io_req;
1447 spinlock_t *io_lock;
1448 unsigned long flags;
1449 struct scsi_cmnd *sc;
Hiral Patel67125b02013-09-12 17:45:42 -07001450 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1451 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001452 struct scsi_lun fc_lun;
1453 enum fnic_ioreq_state old_ioreq_state;
1454
1455 FNIC_SCSI_DBG(KERN_DEBUG,
1456 fnic->lport->host,
Hiral Patel03298552013-02-12 17:00:58 -08001457 "fnic_rport_exch_reset called portid 0x%06x\n",
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001458 port_id);
1459
1460 if (fnic->in_remove)
1461 return;
1462
Hiral Patelfc857992013-09-09 13:31:51 -07001463 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
Hiral Patel03298552013-02-12 17:00:58 -08001464 abt_tag = tag;
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001465 io_lock = fnic_io_lock_tag(fnic, tag);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001466 spin_lock_irqsave(io_lock, flags);
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001467 sc = scsi_host_find_tag(fnic->lport->host, tag);
1468 if (!sc) {
1469 spin_unlock_irqrestore(io_lock, flags);
1470 continue;
1471 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001472
1473 io_req = (struct fnic_io_req *)CMD_SP(sc);
1474
1475 if (!io_req || io_req->port_id != port_id) {
1476 spin_unlock_irqrestore(io_lock, flags);
1477 continue;
1478 }
1479
Hiral Patel03298552013-02-12 17:00:58 -08001480 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
Hiral Patel14eb5d92013-02-12 17:01:01 -08001481 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
Hiral Patel03298552013-02-12 17:00:58 -08001482 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1483 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1484 sc);
1485 spin_unlock_irqrestore(io_lock, flags);
1486 continue;
1487 }
1488
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001489 /*
1490 * Found IO that is still pending with firmware and
1491 * belongs to rport that went away
1492 */
1493 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1494 spin_unlock_irqrestore(io_lock, flags);
1495 continue;
1496 }
Hiral Patel03298552013-02-12 17:00:58 -08001497 if (io_req->abts_done) {
1498 shost_printk(KERN_ERR, fnic->lport->host,
1499 "fnic_rport_exch_reset: io_req->abts_done is set "
1500 "state is %s\n",
1501 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1502 }
1503
Hiral Patel14eb5d92013-02-12 17:01:01 -08001504 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1505 shost_printk(KERN_ERR, fnic->lport->host,
1506 "rport_exch_reset "
1507 "IO not yet issued %p tag 0x%x flags "
1508 "%x state %d\n",
1509 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1510 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001511 old_ioreq_state = CMD_STATE(sc);
1512 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1513 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
Hiral Patel03298552013-02-12 17:00:58 -08001514 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
Hiral Patel67125b02013-09-12 17:45:42 -07001515 atomic64_inc(&reset_stats->device_reset_terminates);
Hiral Patel03298552013-02-12 17:00:58 -08001516 abt_tag = (tag | FNIC_TAG_DEV_RST);
1517 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1518 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1519 sc);
1520 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001521
1522 BUG_ON(io_req->abts_done);
1523
1524 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1525 "fnic_rport_reset_exch: Issuing abts\n");
1526
1527 spin_unlock_irqrestore(io_lock, flags);
1528
1529 /* Now queue the abort command to firmware */
1530 int_to_scsilun(sc->device->lun, &fc_lun);
1531
Hiral Patel03298552013-02-12 17:00:58 -08001532 if (fnic_queue_abort_io_req(fnic, abt_tag,
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001533 FCPIO_ITMF_ABT_TASK_TERM,
1534 fc_lun.scsi_lun, io_req)) {
1535 /*
1536 * Revert the cmd state back to old state, if
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001537 * it hasn't changed in between. This cmd will get
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001538 * aborted later by scsi_eh, or cleaned up during
1539 * lun reset
1540 */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001541 spin_lock_irqsave(io_lock, flags);
1542 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1543 CMD_STATE(sc) = old_ioreq_state;
1544 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel03298552013-02-12 17:00:58 -08001545 } else {
1546 spin_lock_irqsave(io_lock, flags);
Hiral Patela0bf1ca2013-02-12 17:01:00 -08001547 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1548 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001549 else
1550 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
Hiral Patel03298552013-02-12 17:00:58 -08001551 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel67125b02013-09-12 17:45:42 -07001552 atomic64_inc(&term_stats->terminates);
1553 term_cnt++;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001554 }
1555 }
Hiral Patel67125b02013-09-12 17:45:42 -07001556 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1557 atomic64_set(&term_stats->max_terminates, term_cnt);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001558
1559}
1560
1561void fnic_terminate_rport_io(struct fc_rport *rport)
1562{
1563 int tag;
Hiral Patel03298552013-02-12 17:00:58 -08001564 int abt_tag;
Hiral Patel67125b02013-09-12 17:45:42 -07001565 int term_cnt = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001566 struct fnic_io_req *io_req;
1567 spinlock_t *io_lock;
1568 unsigned long flags;
1569 struct scsi_cmnd *sc;
1570 struct scsi_lun fc_lun;
Sesidhar Beddeld0385d92013-09-09 13:31:50 -07001571 struct fc_rport_libfc_priv *rdata;
1572 struct fc_lport *lport;
1573 struct fnic *fnic;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001574 struct fc_rport *cmd_rport;
Hiral Patel67125b02013-09-12 17:45:42 -07001575 struct reset_stats *reset_stats;
1576 struct terminate_stats *term_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001577 enum fnic_ioreq_state old_ioreq_state;
1578
Sesidhar Beddeld0385d92013-09-09 13:31:50 -07001579 if (!rport) {
1580 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1581 return;
1582 }
1583 rdata = rport->dd_data;
1584
1585 if (!rdata) {
1586 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1587 return;
1588 }
1589 lport = rdata->local_port;
1590
1591 if (!lport) {
1592 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1593 return;
1594 }
1595 fnic = lport_priv(lport);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001596 FNIC_SCSI_DBG(KERN_DEBUG,
1597 fnic->lport->host, "fnic_terminate_rport_io called"
Hiral Patel03298552013-02-12 17:00:58 -08001598 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1599 rport->port_name, rport->node_name, rport,
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001600 rport->port_id);
1601
1602 if (fnic->in_remove)
1603 return;
1604
Hiral Patel67125b02013-09-12 17:45:42 -07001605 reset_stats = &fnic->fnic_stats.reset_stats;
1606 term_stats = &fnic->fnic_stats.term_stats;
1607
Hiral Patelfc857992013-09-09 13:31:51 -07001608 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
Hiral Patel03298552013-02-12 17:00:58 -08001609 abt_tag = tag;
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001610 io_lock = fnic_io_lock_tag(fnic, tag);
1611 spin_lock_irqsave(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001612 sc = scsi_host_find_tag(fnic->lport->host, tag);
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001613 if (!sc) {
1614 spin_unlock_irqrestore(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001615 continue;
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001616 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001617
1618 cmd_rport = starget_to_rport(scsi_target(sc->device));
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001619 if (rport != cmd_rport) {
1620 spin_unlock_irqrestore(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001621 continue;
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001622 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001623
1624 io_req = (struct fnic_io_req *)CMD_SP(sc);
1625
1626 if (!io_req || rport != cmd_rport) {
1627 spin_unlock_irqrestore(io_lock, flags);
1628 continue;
1629 }
1630
Hiral Patel03298552013-02-12 17:00:58 -08001631 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
Hiral Patel14eb5d92013-02-12 17:01:01 -08001632 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
Hiral Patel03298552013-02-12 17:00:58 -08001633 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1634 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1635 sc);
1636 spin_unlock_irqrestore(io_lock, flags);
1637 continue;
1638 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001639 /*
1640 * Found IO that is still pending with firmware and
1641 * belongs to rport that went away
1642 */
1643 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1644 spin_unlock_irqrestore(io_lock, flags);
1645 continue;
1646 }
Hiral Patel03298552013-02-12 17:00:58 -08001647 if (io_req->abts_done) {
1648 shost_printk(KERN_ERR, fnic->lport->host,
1649 "fnic_terminate_rport_io: io_req->abts_done is set "
1650 "state is %s\n",
1651 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1652 }
Hiral Patel14eb5d92013-02-12 17:01:01 -08001653 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1654 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1655 "fnic_terminate_rport_io "
1656 "IO not yet issued %p tag 0x%x flags "
1657 "%x state %d\n",
1658 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1659 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001660 old_ioreq_state = CMD_STATE(sc);
1661 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1662 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
Hiral Patel03298552013-02-12 17:00:58 -08001663 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
Hiral Patel67125b02013-09-12 17:45:42 -07001664 atomic64_inc(&reset_stats->device_reset_terminates);
Hiral Patel03298552013-02-12 17:00:58 -08001665 abt_tag = (tag | FNIC_TAG_DEV_RST);
1666 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1667 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1668 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001669
1670 BUG_ON(io_req->abts_done);
1671
1672 FNIC_SCSI_DBG(KERN_DEBUG,
1673 fnic->lport->host,
1674 "fnic_terminate_rport_io: Issuing abts\n");
1675
1676 spin_unlock_irqrestore(io_lock, flags);
1677
1678 /* Now queue the abort command to firmware */
1679 int_to_scsilun(sc->device->lun, &fc_lun);
1680
Hiral Patel03298552013-02-12 17:00:58 -08001681 if (fnic_queue_abort_io_req(fnic, abt_tag,
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001682 FCPIO_ITMF_ABT_TASK_TERM,
1683 fc_lun.scsi_lun, io_req)) {
1684 /*
1685 * Revert the cmd state back to old state, if
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001686 * it hasn't changed in between. This cmd will get
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001687 * aborted later by scsi_eh, or cleaned up during
1688 * lun reset
1689 */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001690 spin_lock_irqsave(io_lock, flags);
1691 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1692 CMD_STATE(sc) = old_ioreq_state;
1693 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel03298552013-02-12 17:00:58 -08001694 } else {
1695 spin_lock_irqsave(io_lock, flags);
Hiral Patela0bf1ca2013-02-12 17:01:00 -08001696 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1697 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001698 else
1699 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
Hiral Patel03298552013-02-12 17:00:58 -08001700 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel67125b02013-09-12 17:45:42 -07001701 atomic64_inc(&term_stats->terminates);
1702 term_cnt++;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001703 }
1704 }
Hiral Patel67125b02013-09-12 17:45:42 -07001705 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1706 atomic64_set(&term_stats->max_terminates, term_cnt);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001707
1708}
1709
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001710/*
1711 * This function is exported to SCSI for sending abort cmnds.
1712 * A SCSI IO is represented by a io_req in the driver.
1713 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1714 */
1715int fnic_abort_cmd(struct scsi_cmnd *sc)
1716{
1717 struct fc_lport *lp;
1718 struct fnic *fnic;
Hiral Patel4d7007b2013-02-12 17:01:02 -08001719 struct fnic_io_req *io_req = NULL;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001720 struct fc_rport *rport;
1721 spinlock_t *io_lock;
1722 unsigned long flags;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001723 unsigned long start_time = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001724 int ret = SUCCESS;
Hiral Patel14eb5d92013-02-12 17:01:01 -08001725 u32 task_req = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001726 struct scsi_lun fc_lun;
Hiral Patel67125b02013-09-12 17:45:42 -07001727 struct fnic_stats *fnic_stats;
1728 struct abort_stats *abts_stats;
1729 struct terminate_stats *term_stats;
Hiral Shah66818662014-04-18 12:28:18 -07001730 enum fnic_ioreq_state old_ioreq_state;
Hiral Patel03298552013-02-12 17:00:58 -08001731 int tag;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001732 DECLARE_COMPLETION_ONSTACK(tm_done);
1733
1734 /* Wait for rport to unblock */
Christof Schmitt65d430f2009-10-30 17:59:29 +01001735 fc_block_scsi_eh(sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001736
1737 /* Get local-port, check ready and link up */
1738 lp = shost_priv(sc->device->host);
1739
1740 fnic = lport_priv(lp);
Hiral Patel67125b02013-09-12 17:45:42 -07001741 fnic_stats = &fnic->fnic_stats;
1742 abts_stats = &fnic->fnic_stats.abts_stats;
1743 term_stats = &fnic->fnic_stats.term_stats;
1744
Roel Kluin0db6f432010-06-11 16:44:46 -07001745 rport = starget_to_rport(scsi_target(sc->device));
Hiral Patel03298552013-02-12 17:00:58 -08001746 tag = sc->request->tag;
1747 FNIC_SCSI_DBG(KERN_DEBUG,
1748 fnic->lport->host,
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001749 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
Hiral Patel03298552013-02-12 17:00:58 -08001750 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1751
1752 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1753
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001754 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1755 ret = FAILED;
1756 goto fnic_abort_cmd_end;
1757 }
1758
1759 /*
1760 * Avoid a race between SCSI issuing the abort and the device
1761 * completing the command.
1762 *
1763 * If the command is already completed by the fw cmpl code,
1764 * we just return SUCCESS from here. This means that the abort
1765 * succeeded. In the SCSI ML, since the timeout for command has
1766 * happened, the completion wont actually complete the command
1767 * and it will be considered as an aborted command
1768 *
1769 * The CMD_SP will not be cleared except while holding io_req_lock.
1770 */
1771 io_lock = fnic_io_lock_hash(fnic, sc);
1772 spin_lock_irqsave(io_lock, flags);
1773 io_req = (struct fnic_io_req *)CMD_SP(sc);
1774 if (!io_req) {
1775 spin_unlock_irqrestore(io_lock, flags);
1776 goto fnic_abort_cmd_end;
1777 }
1778
1779 io_req->abts_done = &tm_done;
1780
1781 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1782 spin_unlock_irqrestore(io_lock, flags);
1783 goto wait_pending;
1784 }
1785 /*
1786 * Command is still pending, need to abort it
1787 * If the firmware completes the command after this point,
1788 * the completion wont be done till mid-layer, since abort
1789 * has already started.
1790 */
Hiral Shah66818662014-04-18 12:28:18 -07001791 old_ioreq_state = CMD_STATE(sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001792 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1793 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1794
1795 spin_unlock_irqrestore(io_lock, flags);
1796
1797 /*
1798 * Check readiness of the remote port. If the path to remote
1799 * port is up, then send abts to the remote port to terminate
1800 * the IO. Else, just locally terminate the IO in the firmware
1801 */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001802 if (fc_remote_port_chkready(rport) == 0)
1803 task_req = FCPIO_ITMF_ABT_TASK;
Hiral Patel67125b02013-09-12 17:45:42 -07001804 else {
1805 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001806 task_req = FCPIO_ITMF_ABT_TASK_TERM;
Hiral Patel67125b02013-09-12 17:45:42 -07001807 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001808
1809 /* Now queue the abort command to firmware */
1810 int_to_scsilun(sc->device->lun, &fc_lun);
1811
1812 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1813 fc_lun.scsi_lun, io_req)) {
1814 spin_lock_irqsave(io_lock, flags);
Hiral Shah66818662014-04-18 12:28:18 -07001815 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1816 CMD_STATE(sc) = old_ioreq_state;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001817 io_req = (struct fnic_io_req *)CMD_SP(sc);
1818 if (io_req)
1819 io_req->abts_done = NULL;
1820 spin_unlock_irqrestore(io_lock, flags);
1821 ret = FAILED;
1822 goto fnic_abort_cmd_end;
1823 }
Hiral Patel67125b02013-09-12 17:45:42 -07001824 if (task_req == FCPIO_ITMF_ABT_TASK) {
Hiral Patel14eb5d92013-02-12 17:01:01 -08001825 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
Hiral Patel67125b02013-09-12 17:45:42 -07001826 atomic64_inc(&fnic_stats->abts_stats.aborts);
1827 } else {
Hiral Patel14eb5d92013-02-12 17:01:01 -08001828 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
Hiral Patel67125b02013-09-12 17:45:42 -07001829 atomic64_inc(&fnic_stats->term_stats.terminates);
1830 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001831
1832 /*
1833 * We queued an abort IO, wait for its completion.
1834 * Once the firmware completes the abort command, it will
1835 * wake up this thread.
1836 */
1837 wait_pending:
1838 wait_for_completion_timeout(&tm_done,
1839 msecs_to_jiffies
1840 (2 * fnic->config.ra_tov +
1841 fnic->config.ed_tov));
1842
1843 /* Check the abort status */
1844 spin_lock_irqsave(io_lock, flags);
1845
1846 io_req = (struct fnic_io_req *)CMD_SP(sc);
1847 if (!io_req) {
Hiral Patel67125b02013-09-12 17:45:42 -07001848 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001849 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -08001850 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001851 ret = FAILED;
1852 goto fnic_abort_cmd_end;
1853 }
1854 io_req->abts_done = NULL;
1855
1856 /* fw did not complete abort, timed out */
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001857 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001858 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel67125b02013-09-12 17:45:42 -07001859 if (task_req == FCPIO_ITMF_ABT_TASK) {
Hiral Patel67125b02013-09-12 17:45:42 -07001860 atomic64_inc(&abts_stats->abort_drv_timeouts);
1861 } else {
Hiral Patel67125b02013-09-12 17:45:42 -07001862 atomic64_inc(&term_stats->terminate_drv_timeouts);
1863 }
Hiral Patel14eb5d92013-02-12 17:01:01 -08001864 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001865 ret = FAILED;
1866 goto fnic_abort_cmd_end;
1867 }
1868
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001869 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1870
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001871 /*
1872 * firmware completed the abort, check the status,
1873 * free the io_req irrespective of failure or success
1874 */
1875 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1876 ret = FAILED;
1877
1878 CMD_SP(sc) = NULL;
1879
1880 spin_unlock_irqrestore(io_lock, flags);
1881
Hiral Patel14eb5d92013-02-12 17:01:01 -08001882 start_time = io_req->start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001883 fnic_release_ioreq_buf(fnic, io_req, sc);
1884 mempool_free(io_req, fnic->io_req_pool);
1885
1886fnic_abort_cmd_end:
Hiral Patel4d7007b2013-02-12 17:01:02 -08001887 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1888 sc->request->tag, sc,
1889 jiffies_to_msecs(jiffies - start_time),
1890 0, ((u64)sc->cmnd[0] << 32 |
1891 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1892 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1893 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1894
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001895 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
Hiral Patel14eb5d92013-02-12 17:01:01 -08001896 "Returning from abort cmd type %x %s\n", task_req,
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001897 (ret == SUCCESS) ?
1898 "SUCCESS" : "FAILED");
1899 return ret;
1900}
1901
1902static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1903 struct scsi_cmnd *sc,
1904 struct fnic_io_req *io_req)
1905{
1906 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
Hiral Patel03298552013-02-12 17:00:58 -08001907 struct Scsi_Host *host = fnic->lport->host;
Hiral Patel67125b02013-09-12 17:45:42 -07001908 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001909 struct scsi_lun fc_lun;
1910 int ret = 0;
1911 unsigned long intr_flags;
1912
Hiral Patel03298552013-02-12 17:00:58 -08001913 spin_lock_irqsave(host->host_lock, intr_flags);
1914 if (unlikely(fnic_chk_state_flags_locked(fnic,
1915 FNIC_FLAGS_IO_BLOCKED))) {
1916 spin_unlock_irqrestore(host->host_lock, intr_flags);
1917 return FAILED;
1918 } else
1919 atomic_inc(&fnic->in_flight);
1920 spin_unlock_irqrestore(host->host_lock, intr_flags);
1921
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001922 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1923
1924 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1925 free_wq_copy_descs(fnic, wq);
1926
1927 if (!vnic_wq_copy_desc_avail(wq)) {
Hiral Patel14eb5d92013-02-12 17:01:01 -08001928 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1929 "queue_dr_io_req failure - no descriptors\n");
Hiral Patel67125b02013-09-12 17:45:42 -07001930 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001931 ret = -EAGAIN;
1932 goto lr_io_req_end;
1933 }
1934
1935 /* fill in the lun info */
1936 int_to_scsilun(sc->device->lun, &fc_lun);
1937
1938 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1939 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1940 fc_lun.scsi_lun, io_req->port_id,
1941 fnic->config.ra_tov, fnic->config.ed_tov);
1942
Hiral Patel67125b02013-09-12 17:45:42 -07001943 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1944 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1945 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1946 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1947 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1948
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001949lr_io_req_end:
1950 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
Hiral Patel03298552013-02-12 17:00:58 -08001951 atomic_dec(&fnic->in_flight);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001952
1953 return ret;
1954}
1955
1956/*
1957 * Clean up any pending aborts on the lun
1958 * For each outstanding IO on this lun, whose abort is not completed by fw,
1959 * issue a local abort. Wait for abort to complete. Return 0 if all commands
1960 * successfully aborted, 1 otherwise
1961 */
1962static int fnic_clean_pending_aborts(struct fnic *fnic,
1963 struct scsi_cmnd *lr_sc)
1964{
Hiral Patela0bf1ca2013-02-12 17:01:00 -08001965 int tag, abt_tag;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001966 struct fnic_io_req *io_req;
1967 spinlock_t *io_lock;
1968 unsigned long flags;
1969 int ret = 0;
1970 struct scsi_cmnd *sc;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001971 struct scsi_lun fc_lun;
1972 struct scsi_device *lun_dev = lr_sc->device;
1973 DECLARE_COMPLETION_ONSTACK(tm_done);
Hiral Patela0bf1ca2013-02-12 17:01:00 -08001974 enum fnic_ioreq_state old_ioreq_state;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001975
Hiral Patelfc857992013-09-09 13:31:51 -07001976 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001977 io_lock = fnic_io_lock_tag(fnic, tag);
1978 spin_lock_irqsave(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001979 sc = scsi_host_find_tag(fnic->lport->host, tag);
1980 /*
1981 * ignore this lun reset cmd or cmds that do not belong to
1982 * this lun
1983 */
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001984 if (!sc || sc == lr_sc || sc->device != lun_dev) {
1985 spin_unlock_irqrestore(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001986 continue;
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07001987 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001988
1989 io_req = (struct fnic_io_req *)CMD_SP(sc);
1990
1991 if (!io_req || sc->device != lun_dev) {
1992 spin_unlock_irqrestore(io_lock, flags);
1993 continue;
1994 }
1995
1996 /*
1997 * Found IO that is still pending with firmware and
1998 * belongs to the LUN that we are resetting
1999 */
2000 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2001 "Found IO in %s on lun\n",
2002 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2003
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002004 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2005 spin_unlock_irqrestore(io_lock, flags);
2006 continue;
2007 }
2008 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
Hiral Patel14eb5d92013-02-12 17:01:01 -08002009 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002010 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2011 "%s dev rst not pending sc 0x%p\n", __func__,
2012 sc);
2013 spin_unlock_irqrestore(io_lock, flags);
2014 continue;
2015 }
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07002016
2017 if (io_req->abts_done)
2018 shost_printk(KERN_ERR, fnic->lport->host,
2019 "%s: io_req->abts_done is set state is %s\n",
2020 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002021 old_ioreq_state = CMD_STATE(sc);
2022 /*
2023 * Any pending IO issued prior to reset is expected to be
2024 * in abts pending state, if not we need to set
2025 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2026 * When IO is completed, the IO will be handed over and
2027 * handled in this function.
2028 */
2029 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2030
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002031 BUG_ON(io_req->abts_done);
2032
2033 abt_tag = tag;
2034 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2035 abt_tag |= FNIC_TAG_DEV_RST;
2036 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2037 "%s: dev rst sc 0x%p\n", __func__, sc);
2038 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002039
2040 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2041 io_req->abts_done = &tm_done;
2042 spin_unlock_irqrestore(io_lock, flags);
2043
2044 /* Now queue the abort command to firmware */
2045 int_to_scsilun(sc->device->lun, &fc_lun);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002046
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002047 if (fnic_queue_abort_io_req(fnic, abt_tag,
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002048 FCPIO_ITMF_ABT_TASK_TERM,
2049 fc_lun.scsi_lun, io_req)) {
2050 spin_lock_irqsave(io_lock, flags);
2051 io_req = (struct fnic_io_req *)CMD_SP(sc);
2052 if (io_req)
2053 io_req->abts_done = NULL;
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002054 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2055 CMD_STATE(sc) = old_ioreq_state;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002056 spin_unlock_irqrestore(io_lock, flags);
2057 ret = 1;
2058 goto clean_pending_aborts_end;
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002059 } else {
2060 spin_lock_irqsave(io_lock, flags);
2061 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2062 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2063 spin_unlock_irqrestore(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002064 }
Hiral Patel14eb5d92013-02-12 17:01:01 -08002065 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002066
2067 wait_for_completion_timeout(&tm_done,
2068 msecs_to_jiffies
2069 (fnic->config.ed_tov));
2070
2071 /* Recheck cmd state to check if it is now aborted */
2072 spin_lock_irqsave(io_lock, flags);
2073 io_req = (struct fnic_io_req *)CMD_SP(sc);
2074 if (!io_req) {
2075 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -08002076 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002077 continue;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002078 }
2079
2080 io_req->abts_done = NULL;
2081
2082 /* if abort is still pending with fw, fail */
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07002083 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002084 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -08002085 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002086 ret = 1;
2087 goto clean_pending_aborts_end;
2088 }
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07002089 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002090 CMD_SP(sc) = NULL;
2091 spin_unlock_irqrestore(io_lock, flags);
2092
2093 fnic_release_ioreq_buf(fnic, io_req, sc);
2094 mempool_free(io_req, fnic->io_req_pool);
2095 }
2096
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002097 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2098
2099 /* walk again to check, if IOs are still pending in fw */
2100 if (fnic_is_abts_pending(fnic, lr_sc))
2101 ret = FAILED;
2102
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002103clean_pending_aborts_end:
2104 return ret;
2105}
2106
Hiral Patel03298552013-02-12 17:00:58 -08002107/**
2108 * fnic_scsi_host_start_tag
2109 * Allocates tagid from host's tag list
2110 **/
2111static inline int
2112fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2113{
2114 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2115 int tag, ret = SCSI_NO_TAG;
2116
2117 BUG_ON(!bqt);
2118 if (!bqt) {
2119 pr_err("Tags are not supported\n");
2120 goto end;
2121 }
2122
2123 do {
2124 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
2125 if (tag >= bqt->max_depth) {
2126 pr_err("Tag allocation failure\n");
2127 goto end;
2128 }
2129 } while (test_and_set_bit(tag, bqt->tag_map));
2130
2131 bqt->tag_index[tag] = sc->request;
2132 sc->request->tag = tag;
2133 sc->tag = tag;
2134 if (!sc->request->special)
2135 sc->request->special = sc;
2136
2137 ret = tag;
2138
2139end:
2140 return ret;
2141}
2142
2143/**
2144 * fnic_scsi_host_end_tag
2145 * frees tag allocated by fnic_scsi_host_start_tag.
2146 **/
2147static inline void
2148fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2149{
2150 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2151 int tag = sc->request->tag;
2152
2153 if (tag == SCSI_NO_TAG)
2154 return;
2155
2156 BUG_ON(!bqt || !bqt->tag_index[tag]);
2157 if (!bqt)
2158 return;
2159
2160 bqt->tag_index[tag] = NULL;
2161 clear_bit(tag, bqt->tag_map);
2162
2163 return;
2164}
2165
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002166/*
2167 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2168 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2169 * on the LUN.
2170 */
2171int fnic_device_reset(struct scsi_cmnd *sc)
2172{
2173 struct fc_lport *lp;
2174 struct fnic *fnic;
Hiral Patel4d7007b2013-02-12 17:01:02 -08002175 struct fnic_io_req *io_req = NULL;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002176 struct fc_rport *rport;
2177 int status;
2178 int ret = FAILED;
2179 spinlock_t *io_lock;
2180 unsigned long flags;
Hiral Patel14eb5d92013-02-12 17:01:01 -08002181 unsigned long start_time = 0;
Hiral Patel03298552013-02-12 17:00:58 -08002182 struct scsi_lun fc_lun;
Hiral Patel67125b02013-09-12 17:45:42 -07002183 struct fnic_stats *fnic_stats;
2184 struct reset_stats *reset_stats;
Hiral Patel4d7007b2013-02-12 17:01:02 -08002185 int tag = 0;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002186 DECLARE_COMPLETION_ONSTACK(tm_done);
Hiral Patel03298552013-02-12 17:00:58 -08002187 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002188
2189 /* Wait for rport to unblock */
Christof Schmitt65d430f2009-10-30 17:59:29 +01002190 fc_block_scsi_eh(sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002191
2192 /* Get local-port, check ready and link up */
2193 lp = shost_priv(sc->device->host);
2194
2195 fnic = lport_priv(lp);
Hiral Patel67125b02013-09-12 17:45:42 -07002196 fnic_stats = &fnic->fnic_stats;
2197 reset_stats = &fnic->fnic_stats.reset_stats;
2198
2199 atomic64_inc(&reset_stats->device_resets);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002200
Roel Kluin0db6f432010-06-11 16:44:46 -07002201 rport = starget_to_rport(scsi_target(sc->device));
2202 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002203 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
Hiral Patel03298552013-02-12 17:00:58 -08002204 rport->port_id, sc->device->lun, sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002205
2206 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2207 goto fnic_device_reset_end;
2208
2209 /* Check if remote port up */
Hiral Patel67125b02013-09-12 17:45:42 -07002210 if (fc_remote_port_chkready(rport)) {
2211 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002212 goto fnic_device_reset_end;
Hiral Patel67125b02013-09-12 17:45:42 -07002213 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002214
Hiral Patel14eb5d92013-02-12 17:01:01 -08002215 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
Hiral Patel03298552013-02-12 17:00:58 -08002216 /* Allocate tag if not present */
2217
2218 tag = sc->request->tag;
2219 if (unlikely(tag < 0)) {
Christoph Hellwig4d637162014-06-12 14:53:23 +02002220 /*
2221 * XXX(hch): current the midlayer fakes up a struct
2222 * request for the explicit reset ioctls, and those
2223 * don't have a tag allocated to them. The below
2224 * code pokes into midlayer structures to paper over
2225 * this design issue, but that won't work for blk-mq.
2226 *
2227 * Either someone who can actually test the hardware
2228 * will have to come up with a similar hack for the
2229 * blk-mq case, or we'll have to bite the bullet and
2230 * fix the way the EH ioctls work for real, but until
2231 * that happens we fail these explicit requests here.
2232 */
2233 if (shost_use_blk_mq(sc->device->host))
2234 goto fnic_device_reset_end;
2235
Hiral Patel03298552013-02-12 17:00:58 -08002236 tag = fnic_scsi_host_start_tag(fnic, sc);
2237 if (unlikely(tag == SCSI_NO_TAG))
2238 goto fnic_device_reset_end;
2239 tag_gen_flag = 1;
2240 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002241 io_lock = fnic_io_lock_hash(fnic, sc);
2242 spin_lock_irqsave(io_lock, flags);
2243 io_req = (struct fnic_io_req *)CMD_SP(sc);
2244
2245 /*
2246 * If there is a io_req attached to this command, then use it,
2247 * else allocate a new one.
2248 */
2249 if (!io_req) {
2250 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2251 if (!io_req) {
2252 spin_unlock_irqrestore(io_lock, flags);
2253 goto fnic_device_reset_end;
2254 }
2255 memset(io_req, 0, sizeof(*io_req));
2256 io_req->port_id = rport->port_id;
2257 CMD_SP(sc) = (char *)io_req;
2258 }
2259 io_req->dr_done = &tm_done;
2260 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2261 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2262 spin_unlock_irqrestore(io_lock, flags);
2263
Hiral Patel03298552013-02-12 17:00:58 -08002264 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002265
2266 /*
2267 * issue the device reset, if enqueue failed, clean up the ioreq
2268 * and break assoc with scsi cmd
2269 */
2270 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2271 spin_lock_irqsave(io_lock, flags);
2272 io_req = (struct fnic_io_req *)CMD_SP(sc);
2273 if (io_req)
2274 io_req->dr_done = NULL;
2275 goto fnic_device_reset_clean;
2276 }
Hiral Patel03298552013-02-12 17:00:58 -08002277 spin_lock_irqsave(io_lock, flags);
Hiral Patel14eb5d92013-02-12 17:01:01 -08002278 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
Hiral Patel03298552013-02-12 17:00:58 -08002279 spin_unlock_irqrestore(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002280
2281 /*
2282 * Wait on the local completion for LUN reset. The io_req may be
2283 * freed while we wait since we hold no lock.
2284 */
2285 wait_for_completion_timeout(&tm_done,
2286 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2287
2288 spin_lock_irqsave(io_lock, flags);
2289 io_req = (struct fnic_io_req *)CMD_SP(sc);
2290 if (!io_req) {
2291 spin_unlock_irqrestore(io_lock, flags);
Hiral Patel03298552013-02-12 17:00:58 -08002292 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2293 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002294 goto fnic_device_reset_end;
2295 }
2296 io_req->dr_done = NULL;
2297
2298 status = CMD_LR_STATUS(sc);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002299
2300 /*
2301 * If lun reset not completed, bail out with failed. io_req
2302 * gets cleaned up during higher levels of EH
2303 */
2304 if (status == FCPIO_INVALID_CODE) {
Hiral Patel67125b02013-09-12 17:45:42 -07002305 atomic64_inc(&reset_stats->device_reset_timeouts);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002306 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2307 "Device reset timed out\n");
Hiral Patel03298552013-02-12 17:00:58 -08002308 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2309 spin_unlock_irqrestore(io_lock, flags);
2310 int_to_scsilun(sc->device->lun, &fc_lun);
2311 /*
Sesidhar Beddel1259c5d2013-09-09 13:31:49 -07002312 * Issue abort and terminate on device reset request.
2313 * If q'ing of terminate fails, retry it after a delay.
Hiral Patel03298552013-02-12 17:00:58 -08002314 */
2315 while (1) {
2316 spin_lock_irqsave(io_lock, flags);
2317 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2318 spin_unlock_irqrestore(io_lock, flags);
2319 break;
2320 }
2321 spin_unlock_irqrestore(io_lock, flags);
2322 if (fnic_queue_abort_io_req(fnic,
2323 tag | FNIC_TAG_DEV_RST,
2324 FCPIO_ITMF_ABT_TASK_TERM,
2325 fc_lun.scsi_lun, io_req)) {
2326 wait_for_completion_timeout(&tm_done,
2327 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2328 } else {
2329 spin_lock_irqsave(io_lock, flags);
2330 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2331 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2332 io_req->abts_done = &tm_done;
2333 spin_unlock_irqrestore(io_lock, flags);
2334 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2335 "Abort and terminate issued on Device reset "
2336 "tag 0x%x sc 0x%p\n", tag, sc);
2337 break;
2338 }
2339 }
2340 while (1) {
2341 spin_lock_irqsave(io_lock, flags);
2342 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2343 spin_unlock_irqrestore(io_lock, flags);
2344 wait_for_completion_timeout(&tm_done,
2345 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2346 break;
2347 } else {
2348 io_req = (struct fnic_io_req *)CMD_SP(sc);
2349 io_req->abts_done = NULL;
2350 goto fnic_device_reset_clean;
2351 }
2352 }
2353 } else {
2354 spin_unlock_irqrestore(io_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002355 }
2356
2357 /* Completed, but not successful, clean up the io_req, return fail */
2358 if (status != FCPIO_SUCCESS) {
2359 spin_lock_irqsave(io_lock, flags);
2360 FNIC_SCSI_DBG(KERN_DEBUG,
2361 fnic->lport->host,
2362 "Device reset completed - failed\n");
2363 io_req = (struct fnic_io_req *)CMD_SP(sc);
2364 goto fnic_device_reset_clean;
2365 }
2366
2367 /*
2368 * Clean up any aborts on this lun that have still not
2369 * completed. If any of these fail, then LUN reset fails.
2370 * clean_pending_aborts cleans all cmds on this lun except
2371 * the lun reset cmd. If all cmds get cleaned, the lun reset
2372 * succeeds
2373 */
2374 if (fnic_clean_pending_aborts(fnic, sc)) {
2375 spin_lock_irqsave(io_lock, flags);
2376 io_req = (struct fnic_io_req *)CMD_SP(sc);
2377 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2378 "Device reset failed"
2379 " since could not abort all IOs\n");
2380 goto fnic_device_reset_clean;
2381 }
2382
2383 /* Clean lun reset command */
2384 spin_lock_irqsave(io_lock, flags);
2385 io_req = (struct fnic_io_req *)CMD_SP(sc);
2386 if (io_req)
2387 /* Completed, and successful */
2388 ret = SUCCESS;
2389
2390fnic_device_reset_clean:
2391 if (io_req)
2392 CMD_SP(sc) = NULL;
2393
2394 spin_unlock_irqrestore(io_lock, flags);
2395
2396 if (io_req) {
Hiral Patel14eb5d92013-02-12 17:01:01 -08002397 start_time = io_req->start_time;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002398 fnic_release_ioreq_buf(fnic, io_req, sc);
2399 mempool_free(io_req, fnic->io_req_pool);
2400 }
2401
2402fnic_device_reset_end:
Hiral Patel4d7007b2013-02-12 17:01:02 -08002403 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2404 sc->request->tag, sc,
2405 jiffies_to_msecs(jiffies - start_time),
2406 0, ((u64)sc->cmnd[0] << 32 |
2407 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2408 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2409 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2410
Hiral Patel03298552013-02-12 17:00:58 -08002411 /* free tag if it is allocated */
2412 if (unlikely(tag_gen_flag))
2413 fnic_scsi_host_end_tag(fnic, sc);
2414
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002415 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2416 "Returning from device reset %s\n",
2417 (ret == SUCCESS) ?
2418 "SUCCESS" : "FAILED");
Hiral Patel67125b02013-09-12 17:45:42 -07002419
2420 if (ret == FAILED)
2421 atomic64_inc(&reset_stats->device_reset_failures);
2422
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002423 return ret;
2424}
2425
2426/* Clean up all IOs, clean up libFC local port */
2427int fnic_reset(struct Scsi_Host *shost)
2428{
2429 struct fc_lport *lp;
2430 struct fnic *fnic;
Narsimhulu Musini441fbd22013-09-12 17:45:41 -07002431 int ret = 0;
Hiral Patel67125b02013-09-12 17:45:42 -07002432 struct reset_stats *reset_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002433
2434 lp = shost_priv(shost);
2435 fnic = lport_priv(lp);
Hiral Patel67125b02013-09-12 17:45:42 -07002436 reset_stats = &fnic->fnic_stats.reset_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002437
2438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2439 "fnic_reset called\n");
2440
Hiral Patel67125b02013-09-12 17:45:42 -07002441 atomic64_inc(&reset_stats->fnic_resets);
2442
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002443 /*
2444 * Reset local port, this will clean up libFC exchanges,
2445 * reset remote port sessions, and if link is up, begin flogi
2446 */
Narsimhulu Musini441fbd22013-09-12 17:45:41 -07002447 ret = lp->tt.lport_reset(lp);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002448
2449 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2450 "Returning from fnic reset %s\n",
Narsimhulu Musini441fbd22013-09-12 17:45:41 -07002451 (ret == 0) ?
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002452 "SUCCESS" : "FAILED");
2453
Hiral Patel67125b02013-09-12 17:45:42 -07002454 if (ret == 0)
2455 atomic64_inc(&reset_stats->fnic_reset_completions);
2456 else
2457 atomic64_inc(&reset_stats->fnic_reset_failures);
2458
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002459 return ret;
2460}
2461
2462/*
2463 * SCSI Error handling calls driver's eh_host_reset if all prior
2464 * error handling levels return FAILED. If host reset completes
2465 * successfully, and if link is up, then Fabric login begins.
2466 *
2467 * Host Reset is the highest level of error recovery. If this fails, then
2468 * host is offlined by SCSI.
2469 *
2470 */
2471int fnic_host_reset(struct scsi_cmnd *sc)
2472{
2473 int ret;
2474 unsigned long wait_host_tmo;
2475 struct Scsi_Host *shost = sc->device->host;
2476 struct fc_lport *lp = shost_priv(shost);
2477
2478 /*
2479 * If fnic_reset is successful, wait for fabric login to complete
2480 * scsi-ml tries to send a TUR to every device if host reset is
2481 * successful, so before returning to scsi, fabric should be up
2482 */
Narsimhulu Musini441fbd22013-09-12 17:45:41 -07002483 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002484 if (ret == SUCCESS) {
2485 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2486 ret = FAILED;
2487 while (time_before(jiffies, wait_host_tmo)) {
2488 if ((lp->state == LPORT_ST_READY) &&
2489 (lp->link_up)) {
2490 ret = SUCCESS;
2491 break;
2492 }
2493 ssleep(1);
2494 }
2495 }
2496
2497 return ret;
2498}
2499
2500/*
2501 * This fxn is called from libFC when host is removed
2502 */
2503void fnic_scsi_abort_io(struct fc_lport *lp)
2504{
2505 int err = 0;
2506 unsigned long flags;
2507 enum fnic_state old_state;
2508 struct fnic *fnic = lport_priv(lp);
2509 DECLARE_COMPLETION_ONSTACK(remove_wait);
2510
2511 /* Issue firmware reset for fnic, wait for reset to complete */
Hiral Patel03298552013-02-12 17:00:58 -08002512retry_fw_reset:
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002513 spin_lock_irqsave(&fnic->fnic_lock, flags);
Hiral Patel03298552013-02-12 17:00:58 -08002514 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2515 /* fw reset is in progress, poll for its completion */
2516 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2517 schedule_timeout(msecs_to_jiffies(100));
2518 goto retry_fw_reset;
2519 }
2520
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002521 fnic->remove_wait = &remove_wait;
2522 old_state = fnic->state;
2523 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
Joe Eykholt78112e52009-11-03 11:49:22 -08002524 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002525 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2526
2527 err = fnic_fw_reset_handler(fnic);
2528 if (err) {
2529 spin_lock_irqsave(&fnic->fnic_lock, flags);
2530 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2531 fnic->state = old_state;
2532 fnic->remove_wait = NULL;
2533 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2534 return;
2535 }
2536
2537 /* Wait for firmware reset to complete */
2538 wait_for_completion_timeout(&remove_wait,
2539 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2540
2541 spin_lock_irqsave(&fnic->fnic_lock, flags);
2542 fnic->remove_wait = NULL;
2543 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2544 "fnic_scsi_abort_io %s\n",
2545 (fnic->state == FNIC_IN_ETH_MODE) ?
2546 "SUCCESS" : "FAILED");
2547 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2548
2549}
2550
2551/*
2552 * This fxn called from libFC to clean up driver IO state on link down
2553 */
2554void fnic_scsi_cleanup(struct fc_lport *lp)
2555{
2556 unsigned long flags;
2557 enum fnic_state old_state;
2558 struct fnic *fnic = lport_priv(lp);
2559
2560 /* issue fw reset */
Hiral Patel03298552013-02-12 17:00:58 -08002561retry_fw_reset:
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002562 spin_lock_irqsave(&fnic->fnic_lock, flags);
Hiral Patel03298552013-02-12 17:00:58 -08002563 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2564 /* fw reset is in progress, poll for its completion */
2565 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2566 schedule_timeout(msecs_to_jiffies(100));
2567 goto retry_fw_reset;
2568 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002569 old_state = fnic->state;
2570 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
Joe Eykholt78112e52009-11-03 11:49:22 -08002571 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07002572 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2573
2574 if (fnic_fw_reset_handler(fnic)) {
2575 spin_lock_irqsave(&fnic->fnic_lock, flags);
2576 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2577 fnic->state = old_state;
2578 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2579 }
2580
2581}
2582
2583void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2584{
2585}
2586
2587void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2588{
2589 struct fnic *fnic = lport_priv(lp);
2590
2591 /* Non-zero sid, nothing to do */
2592 if (sid)
2593 goto call_fc_exch_mgr_reset;
2594
2595 if (did) {
2596 fnic_rport_exch_reset(fnic, did);
2597 goto call_fc_exch_mgr_reset;
2598 }
2599
2600 /*
2601 * sid = 0, did = 0
2602 * link down or device being removed
2603 */
2604 if (!fnic->in_remove)
2605 fnic_scsi_cleanup(lp);
2606 else
2607 fnic_scsi_abort_io(lp);
2608
2609 /* call libFC exch mgr reset to reset its exchanges */
2610call_fc_exch_mgr_reset:
2611 fc_exch_mgr_reset(lp, sid, did);
2612
2613}
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002614
2615/*
2616 * fnic_is_abts_pending() is a helper function that
2617 * walks through tag map to check if there is any IOs pending,if there is one,
2618 * then it returns 1 (true), otherwise 0 (false)
2619 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2620 * otherwise, it checks for all IOs.
2621 */
2622int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2623{
2624 int tag;
2625 struct fnic_io_req *io_req;
2626 spinlock_t *io_lock;
2627 unsigned long flags;
2628 int ret = 0;
2629 struct scsi_cmnd *sc;
2630 struct scsi_device *lun_dev = NULL;
2631
2632 if (lr_sc)
2633 lun_dev = lr_sc->device;
2634
2635 /* walk again to check, if IOs are still pending in fw */
Hiral Patelfc857992013-09-09 13:31:51 -07002636 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002637 sc = scsi_host_find_tag(fnic->lport->host, tag);
2638 /*
2639 * ignore this lun reset cmd or cmds that do not belong to
2640 * this lun
2641 */
2642 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2643 continue;
2644
2645 io_lock = fnic_io_lock_hash(fnic, sc);
2646 spin_lock_irqsave(io_lock, flags);
2647
2648 io_req = (struct fnic_io_req *)CMD_SP(sc);
2649
2650 if (!io_req || sc->device != lun_dev) {
2651 spin_unlock_irqrestore(io_lock, flags);
2652 continue;
2653 }
2654
2655 /*
2656 * Found IO that is still pending with firmware and
2657 * belongs to the LUN that we are resetting
2658 */
2659 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2660 "Found IO in %s on lun\n",
2661 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2662
Dan Carpenter5d65f912013-05-30 10:50:46 +03002663 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002664 ret = 1;
Dan Carpenter5d65f912013-05-30 10:50:46 +03002665 spin_unlock_irqrestore(io_lock, flags);
Hiral Patela0bf1ca2013-02-12 17:01:00 -08002666 }
2667
2668 return ret;
2669}