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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.5 */6#include <linux/mempool.h>7#include <linux/errno.h>8#include <linux/init.h>9#include <linux/workqueue.h>10#include <linux/pci.h>11#include <linux/scatterlist.h>12#include <linux/skbuff.h>13#include <linux/spinlock.h>14#include <linux/etherdevice.h>15#include <linux/if_ether.h>16#include <linux/if_vlan.h>17#include <linux/delay.h>18#include <linux/gfp.h>19#include <scsi/scsi.h>20#include <scsi/scsi_host.h>21#include <scsi/scsi_device.h>22#include <scsi/scsi_cmnd.h>23#include <scsi/scsi_tcq.h>24#include <scsi/fc/fc_els.h>25#include <scsi/fc/fc_fcoe.h>26#include <scsi/libfc.h>27#include <scsi/fc_frame.h>28#include "fnic_io.h"29#include "fnic.h"30 31const char *fnic_state_str[] = {32 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",33 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",34 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",35 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",36};37 38static const char *fnic_ioreq_state_str[] = {39 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",40 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",41 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",42 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",43 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",44};45 46static const char *fcpio_status_str[] = {47 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/48 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",49 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",50 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",51 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",52 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",53 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/54 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",55 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",56 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",57 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",58 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",59 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",60 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",61 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",62 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",63 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",64 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",65 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",66};67 68const char *fnic_state_to_str(unsigned int state)69{70 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])71 return "unknown";72 73 return fnic_state_str[state];74}75 76static const char *fnic_ioreq_state_to_str(unsigned int state)77{78 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||79 !fnic_ioreq_state_str[state])80 return "unknown";81 82 return fnic_ioreq_state_str[state];83}84 85static const char *fnic_fcpio_status_to_str(unsigned int status)86{87 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])88 return "unknown";89 90 return fcpio_status_str[status];91}92 93static void fnic_cleanup_io(struct fnic *fnic);94 95/*96 * Unmap the data buffer and sense buffer for an io_req,97 * also unmap and free the device-private scatter/gather list.98 */99static void fnic_release_ioreq_buf(struct fnic *fnic,100 struct fnic_io_req *io_req,101 struct scsi_cmnd *sc)102{103 if (io_req->sgl_list_pa)104 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,105 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,106 DMA_TO_DEVICE);107 scsi_dma_unmap(sc);108 109 if (io_req->sgl_cnt)110 mempool_free(io_req->sgl_list_alloc,111 fnic->io_sgl_pool[io_req->sgl_type]);112 if (io_req->sense_buf_pa)113 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,114 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);115}116 117/* Free up Copy Wq descriptors. Called with copy_wq lock held */118static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq, unsigned int hwq)119{120 /* if no Ack received from firmware, then nothing to clean */121 if (!fnic->fw_ack_recd[hwq])122 return 1;123 124 /*125 * Update desc_available count based on number of freed descriptors126 * Account for wraparound127 */128 if (wq->to_clean_index <= fnic->fw_ack_index[hwq])129 wq->ring.desc_avail += (fnic->fw_ack_index[hwq]130 - wq->to_clean_index + 1);131 else132 wq->ring.desc_avail += (wq->ring.desc_count133 - wq->to_clean_index134 + fnic->fw_ack_index[hwq] + 1);135 136 /*137 * just bump clean index to ack_index+1 accounting for wraparound138 * this will essentially free up all descriptors between139 * to_clean_index and fw_ack_index, both inclusive140 */141 wq->to_clean_index =142 (fnic->fw_ack_index[hwq] + 1) % wq->ring.desc_count;143 144 /* we have processed the acks received so far */145 fnic->fw_ack_recd[hwq] = 0;146 return 0;147}148 149 150/*151 * __fnic_set_state_flags152 * Sets/Clears bits in fnic's state_flags153 **/154void155__fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,156 unsigned long clearbits)157{158 unsigned long flags = 0;159 160 spin_lock_irqsave(&fnic->fnic_lock, flags);161 162 if (clearbits)163 fnic->state_flags &= ~st_flags;164 else165 fnic->state_flags |= st_flags;166 167 spin_unlock_irqrestore(&fnic->fnic_lock, flags);168 169 return;170}171 172 173/*174 * fnic_fw_reset_handler175 * Routine to send reset msg to fw176 */177int fnic_fw_reset_handler(struct fnic *fnic)178{179 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0];180 int ret = 0;181 unsigned long flags;182 183 /* indicate fwreset to io path */184 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);185 186 skb_queue_purge(&fnic->frame_queue);187 skb_queue_purge(&fnic->tx_queue);188 189 /* wait for io cmpl */190 while (atomic_read(&fnic->in_flight))191 schedule_timeout(msecs_to_jiffies(1));192 193 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);194 195 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])196 free_wq_copy_descs(fnic, wq, 0);197 198 if (!vnic_wq_copy_desc_avail(wq))199 ret = -EAGAIN;200 else {201 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);202 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);203 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >204 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))205 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,206 atomic64_read(207 &fnic->fnic_stats.fw_stats.active_fw_reqs));208 }209 210 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);211 212 if (!ret) {213 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);214 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,215 "Issued fw reset\n");216 } else {217 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);218 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,219 "Failed to issue fw reset\n");220 }221 222 return ret;223}224 225 226/*227 * fnic_flogi_reg_handler228 * Routine to send flogi register msg to fw229 */230int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)231{232 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0];233 enum fcpio_flogi_reg_format_type format;234 struct fc_lport *lp = fnic->lport;235 u8 gw_mac[ETH_ALEN];236 int ret = 0;237 unsigned long flags;238 239 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);240 241 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])242 free_wq_copy_descs(fnic, wq, 0);243 244 if (!vnic_wq_copy_desc_avail(wq)) {245 ret = -EAGAIN;246 goto flogi_reg_ioreq_end;247 }248 249 if (fnic->ctlr.map_dest) {250 eth_broadcast_addr(gw_mac);251 format = FCPIO_FLOGI_REG_DEF_DEST;252 } else {253 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);254 format = FCPIO_FLOGI_REG_GW_DEST;255 }256 257 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {258 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,259 fc_id, gw_mac,260 fnic->data_src_addr,261 lp->r_a_tov, lp->e_d_tov);262 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,263 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",264 fc_id, fnic->data_src_addr, gw_mac);265 } else {266 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,267 format, fc_id, gw_mac);268 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,269 "FLOGI reg issued fcid 0x%x map %d dest 0x%p\n",270 fc_id, fnic->ctlr.map_dest, gw_mac);271 }272 273 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);274 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >275 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))276 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,277 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));278 279flogi_reg_ioreq_end:280 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);281 return ret;282}283 284/*285 * fnic_queue_wq_copy_desc286 * Routine to enqueue a wq copy desc287 */288static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,289 struct vnic_wq_copy *wq,290 struct fnic_io_req *io_req,291 struct scsi_cmnd *sc,292 int sg_count,293 uint32_t mqtag,294 uint16_t hwq)295{296 struct scatterlist *sg;297 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));298 struct fc_rport_libfc_priv *rp = rport->dd_data;299 struct host_sg_desc *desc;300 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;301 unsigned int i;302 int flags;303 u8 exch_flags;304 struct scsi_lun fc_lun;305 306 if (sg_count) {307 /* For each SGE, create a device desc entry */308 desc = io_req->sgl_list;309 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {310 desc->addr = cpu_to_le64(sg_dma_address(sg));311 desc->len = cpu_to_le32(sg_dma_len(sg));312 desc->_resvd = 0;313 desc++;314 }315 316 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,317 io_req->sgl_list,318 sizeof(io_req->sgl_list[0]) * sg_count,319 DMA_TO_DEVICE);320 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {321 printk(KERN_ERR "DMA mapping failed\n");322 return SCSI_MLQUEUE_HOST_BUSY;323 }324 }325 326 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,327 sc->sense_buffer,328 SCSI_SENSE_BUFFERSIZE,329 DMA_FROM_DEVICE);330 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {331 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,332 sizeof(io_req->sgl_list[0]) * sg_count,333 DMA_TO_DEVICE);334 printk(KERN_ERR "DMA mapping failed\n");335 return SCSI_MLQUEUE_HOST_BUSY;336 }337 338 int_to_scsilun(sc->device->lun, &fc_lun);339 340 /* Enqueue the descriptor in the Copy WQ */341 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq])342 free_wq_copy_descs(fnic, wq, hwq);343 344 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {345 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,346 "fnic_queue_wq_copy_desc failure - no descriptors\n");347 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);348 return SCSI_MLQUEUE_HOST_BUSY;349 }350 351 flags = 0;352 if (sc->sc_data_direction == DMA_FROM_DEVICE)353 flags = FCPIO_ICMND_RDDATA;354 else if (sc->sc_data_direction == DMA_TO_DEVICE)355 flags = FCPIO_ICMND_WRDATA;356 357 exch_flags = 0;358 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&359 (rp->flags & FC_RP_FLAGS_RETRY))360 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;361 362 fnic_queue_wq_copy_desc_icmnd_16(wq, mqtag,363 0, exch_flags, io_req->sgl_cnt,364 SCSI_SENSE_BUFFERSIZE,365 io_req->sgl_list_pa,366 io_req->sense_buf_pa,367 0, /* scsi cmd ref, always 0 */368 FCPIO_ICMND_PTA_SIMPLE,369 /* scsi pri and tag */370 flags, /* command flags */371 sc->cmnd, sc->cmd_len,372 scsi_bufflen(sc),373 fc_lun.scsi_lun, io_req->port_id,374 rport->maxframe_size, rp->r_a_tov,375 rp->e_d_tov);376 377 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);378 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >379 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))380 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,381 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));382 383 return 0;384}385 386int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc)387{388 struct request *const rq = scsi_cmd_to_rq(sc);389 uint32_t mqtag = 0;390 void (*done)(struct scsi_cmnd *) = scsi_done;391 struct fc_lport *lp = shost_priv(sc->device->host);392 struct fc_rport *rport;393 struct fnic_io_req *io_req = NULL;394 struct fnic *fnic = lport_priv(lp);395 struct fnic_stats *fnic_stats = &fnic->fnic_stats;396 struct vnic_wq_copy *wq;397 int ret = 1;398 u64 cmd_trace;399 int sg_count = 0;400 unsigned long flags = 0;401 unsigned long ptr;402 int io_lock_acquired = 0;403 struct fc_rport_libfc_priv *rp;404 uint16_t hwq = 0;405 406 mqtag = blk_mq_unique_tag(rq);407 spin_lock_irqsave(&fnic->fnic_lock, flags);408 409 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) {410 spin_unlock_irqrestore(&fnic->fnic_lock, flags);411 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,412 "fnic IO blocked flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n",413 fnic->state_flags);414 return SCSI_MLQUEUE_HOST_BUSY;415 }416 417 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) {418 spin_unlock_irqrestore(&fnic->fnic_lock, flags);419 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,420 "fnic flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n",421 fnic->state_flags);422 return SCSI_MLQUEUE_HOST_BUSY;423 }424 425 rport = starget_to_rport(scsi_target(sc->device));426 if (!rport) {427 spin_unlock_irqrestore(&fnic->fnic_lock, flags);428 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,429 "returning DID_NO_CONNECT for IO as rport is NULL\n");430 sc->result = DID_NO_CONNECT << 16;431 done(sc);432 return 0;433 }434 435 ret = fc_remote_port_chkready(rport);436 if (ret) {437 spin_unlock_irqrestore(&fnic->fnic_lock, flags);438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,439 "rport is not ready\n");440 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);441 sc->result = ret;442 done(sc);443 return 0;444 }445 446 rp = rport->dd_data;447 if (!rp || rp->rp_state == RPORT_ST_DELETE) {448 spin_unlock_irqrestore(&fnic->fnic_lock, flags);449 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,450 "rport 0x%x removed, returning DID_NO_CONNECT\n",451 rport->port_id);452 453 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);454 sc->result = DID_NO_CONNECT<<16;455 done(sc);456 return 0;457 }458 459 if (rp->rp_state != RPORT_ST_READY) {460 spin_unlock_irqrestore(&fnic->fnic_lock, flags);461 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,462 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",463 rport->port_id, rp->rp_state);464 465 sc->result = DID_IMM_RETRY << 16;466 done(sc);467 return 0;468 }469 470 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {471 spin_unlock_irqrestore(&fnic->fnic_lock, flags);472 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,473 "state not ready: %d/link not up: %d Returning HOST_BUSY\n",474 lp->state, lp->link_up);475 return SCSI_MLQUEUE_HOST_BUSY;476 }477 478 atomic_inc(&fnic->in_flight);479 480 spin_unlock_irqrestore(&fnic->fnic_lock, flags);481 fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED;482 fnic_priv(sc)->flags = FNIC_NO_FLAGS;483 484 /* Get a new io_req for this SCSI IO */485 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);486 if (!io_req) {487 atomic64_inc(&fnic_stats->io_stats.alloc_failures);488 ret = SCSI_MLQUEUE_HOST_BUSY;489 goto out;490 }491 memset(io_req, 0, sizeof(*io_req));492 493 /* Map the data buffer */494 sg_count = scsi_dma_map(sc);495 if (sg_count < 0) {496 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,497 mqtag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state);498 mempool_free(io_req, fnic->io_req_pool);499 goto out;500 }501 502 /* Determine the type of scatter/gather list we need */503 io_req->sgl_cnt = sg_count;504 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;505 if (sg_count > FNIC_DFLT_SG_DESC_CNT)506 io_req->sgl_type = FNIC_SGL_CACHE_MAX;507 508 if (sg_count) {509 io_req->sgl_list =510 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],511 GFP_ATOMIC);512 if (!io_req->sgl_list) {513 atomic64_inc(&fnic_stats->io_stats.alloc_failures);514 ret = SCSI_MLQUEUE_HOST_BUSY;515 scsi_dma_unmap(sc);516 mempool_free(io_req, fnic->io_req_pool);517 goto out;518 }519 520 /* Cache sgl list allocated address before alignment */521 io_req->sgl_list_alloc = io_req->sgl_list;522 ptr = (unsigned long) io_req->sgl_list;523 if (ptr % FNIC_SG_DESC_ALIGN) {524 io_req->sgl_list = (struct host_sg_desc *)525 (((unsigned long) ptr526 + FNIC_SG_DESC_ALIGN - 1)527 & ~(FNIC_SG_DESC_ALIGN - 1));528 }529 }530 531 /*532 * Will acquire lock before setting to IO initialized.533 */534 hwq = blk_mq_unique_tag_to_hwq(mqtag);535 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);536 537 /* initialize rest of io_req */538 io_lock_acquired = 1;539 io_req->port_id = rport->port_id;540 io_req->start_time = jiffies;541 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING;542 fnic_priv(sc)->io_req = io_req;543 fnic_priv(sc)->flags |= FNIC_IO_INITIALIZED;544 io_req->sc = sc;545 546 if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL) {547 WARN(1, "fnic<%d>: %s: hwq: %d tag 0x%x already exists\n",548 fnic->fnic_num, __func__, hwq, blk_mq_unique_tag_to_tag(mqtag));549 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);550 return SCSI_MLQUEUE_HOST_BUSY;551 }552 553 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = io_req;554 io_req->tag = mqtag;555 556 /* create copy wq desc and enqueue it */557 wq = &fnic->hw_copy_wq[hwq];558 atomic64_inc(&fnic_stats->io_stats.ios[hwq]);559 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count, mqtag, hwq);560 if (ret) {561 /*562 * In case another thread cancelled the request,563 * refetch the pointer under the lock.564 */565 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,566 mqtag, sc, 0, 0, 0, fnic_flags_and_state(sc));567 io_req = fnic_priv(sc)->io_req;568 fnic_priv(sc)->io_req = NULL;569 if (io_req)570 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = NULL;571 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;572 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);573 if (io_req) {574 fnic_release_ioreq_buf(fnic, io_req, sc);575 mempool_free(io_req, fnic->io_req_pool);576 }577 atomic_dec(&fnic->in_flight);578 return ret;579 } else {580 atomic64_inc(&fnic_stats->io_stats.active_ios);581 atomic64_inc(&fnic_stats->io_stats.num_ios);582 if (atomic64_read(&fnic_stats->io_stats.active_ios) >583 atomic64_read(&fnic_stats->io_stats.max_active_ios))584 atomic64_set(&fnic_stats->io_stats.max_active_ios,585 atomic64_read(&fnic_stats->io_stats.active_ios));586 587 /* REVISIT: Use per IO lock in the final code */588 fnic_priv(sc)->flags |= FNIC_IO_ISSUED;589 }590out:591 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |592 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |593 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |594 sc->cmnd[5]);595 596 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,597 mqtag, sc, io_req, sg_count, cmd_trace,598 fnic_flags_and_state(sc));599 600 /* if only we issued IO, will we have the io lock */601 if (io_lock_acquired)602 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);603 604 atomic_dec(&fnic->in_flight);605 return ret;606}607 608 609/*610 * fnic_fcpio_fw_reset_cmpl_handler611 * Routine to handle fw reset completion612 */613static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,614 struct fcpio_fw_req *desc)615{616 u8 type;617 u8 hdr_status;618 struct fcpio_tag tag;619 int ret = 0;620 unsigned long flags;621 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;622 623 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);624 625 atomic64_inc(&reset_stats->fw_reset_completions);626 627 /* Clean up all outstanding io requests */628 fnic_cleanup_io(fnic);629 630 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);631 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);632 atomic64_set(&fnic->io_cmpl_skip, 0);633 634 spin_lock_irqsave(&fnic->fnic_lock, flags);635 636 /* fnic should be in FC_TRANS_ETH_MODE */637 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {638 /* Check status of reset completion */639 if (!hdr_status) {640 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,641 "reset cmpl success\n");642 /* Ready to send flogi out */643 fnic->state = FNIC_IN_ETH_MODE;644 } else {645 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,646 "reset failed with header status: %s\n",647 fnic_fcpio_status_to_str(hdr_status));648 649 /*650 * Unable to change to eth mode, cannot send out flogi651 * Change state to fc mode, so that subsequent Flogi652 * requests from libFC will cause more attempts to653 * reset the firmware. Free the cached flogi654 */655 fnic->state = FNIC_IN_FC_MODE;656 atomic64_inc(&reset_stats->fw_reset_failures);657 ret = -1;658 }659 } else {660 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,661 "Unexpected state while processing reset completion: %s\n",662 fnic_state_to_str(fnic->state));663 atomic64_inc(&reset_stats->fw_reset_failures);664 ret = -1;665 }666 667 /* Thread removing device blocks till firmware reset is complete */668 if (fnic->remove_wait)669 complete(fnic->remove_wait);670 671 /*672 * If fnic is being removed, or fw reset failed673 * free the flogi frame. Else, send it out674 */675 if (fnic->remove_wait || ret) {676 spin_unlock_irqrestore(&fnic->fnic_lock, flags);677 skb_queue_purge(&fnic->tx_queue);678 goto reset_cmpl_handler_end;679 }680 681 spin_unlock_irqrestore(&fnic->fnic_lock, flags);682 683 queue_work(fnic_event_queue, &fnic->flush_work);684 685 reset_cmpl_handler_end:686 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);687 688 return ret;689}690 691/*692 * fnic_fcpio_flogi_reg_cmpl_handler693 * Routine to handle flogi register completion694 */695static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,696 struct fcpio_fw_req *desc)697{698 u8 type;699 u8 hdr_status;700 struct fcpio_tag tag;701 int ret = 0;702 unsigned long flags;703 704 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);705 706 /* Update fnic state based on status of flogi reg completion */707 spin_lock_irqsave(&fnic->fnic_lock, flags);708 709 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {710 711 /* Check flogi registration completion status */712 if (!hdr_status) {713 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,714 "flog reg succeeded\n");715 fnic->state = FNIC_IN_FC_MODE;716 } else {717 FNIC_SCSI_DBG(KERN_DEBUG,718 fnic->lport->host, fnic->fnic_num,719 "fnic flogi reg :failed %s\n",720 fnic_fcpio_status_to_str(hdr_status));721 fnic->state = FNIC_IN_ETH_MODE;722 ret = -1;723 }724 } else {725 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,726 "Unexpected fnic state %s while"727 " processing flogi reg completion\n",728 fnic_state_to_str(fnic->state));729 ret = -1;730 }731 732 if (!ret) {733 if (fnic->stop_rx_link_events) {734 spin_unlock_irqrestore(&fnic->fnic_lock, flags);735 goto reg_cmpl_handler_end;736 }737 spin_unlock_irqrestore(&fnic->fnic_lock, flags);738 739 queue_work(fnic_event_queue, &fnic->flush_work);740 queue_work(fnic_event_queue, &fnic->frame_work);741 } else {742 spin_unlock_irqrestore(&fnic->fnic_lock, flags);743 }744 745reg_cmpl_handler_end:746 return ret;747}748 749static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,750 u16 request_out)751{752 if (wq->to_clean_index <= wq->to_use_index) {753 /* out of range, stale request_out index */754 if (request_out < wq->to_clean_index ||755 request_out >= wq->to_use_index)756 return 0;757 } else {758 /* out of range, stale request_out index */759 if (request_out < wq->to_clean_index &&760 request_out >= wq->to_use_index)761 return 0;762 }763 /* request_out index is in range */764 return 1;765}766 767 768/*769 * Mark that ack received and store the Ack index. If there are multiple770 * acks received before Tx thread cleans it up, the latest value will be771 * used which is correct behavior. This state should be in the copy Wq772 * instead of in the fnic773 */774static inline void fnic_fcpio_ack_handler(struct fnic *fnic,775 unsigned int cq_index,776 struct fcpio_fw_req *desc)777{778 struct vnic_wq_copy *wq;779 u16 request_out = desc->u.ack.request_out;780 unsigned long flags;781 u64 *ox_id_tag = (u64 *)(void *)desc;782 unsigned int wq_index = cq_index;783 784 /* mark the ack state */785 wq = &fnic->hw_copy_wq[cq_index];786 spin_lock_irqsave(&fnic->wq_copy_lock[wq_index], flags);787 788 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;789 if (is_ack_index_in_range(wq, request_out)) {790 fnic->fw_ack_index[wq_index] = request_out;791 fnic->fw_ack_recd[wq_index] = 1;792 } else793 atomic64_inc(794 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);795 796 spin_unlock_irqrestore(&fnic->wq_copy_lock[wq_index], flags);797 FNIC_TRACE(fnic_fcpio_ack_handler,798 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],799 ox_id_tag[4], ox_id_tag[5]);800}801 802/*803 * fnic_fcpio_icmnd_cmpl_handler804 * Routine to handle icmnd completions805 */806static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, unsigned int cq_index,807 struct fcpio_fw_req *desc)808{809 u8 type;810 u8 hdr_status;811 struct fcpio_tag ftag;812 u32 id;813 u64 xfer_len = 0;814 struct fcpio_icmnd_cmpl *icmnd_cmpl;815 struct fnic_io_req *io_req;816 struct scsi_cmnd *sc;817 struct fnic_stats *fnic_stats = &fnic->fnic_stats;818 unsigned long flags;819 u64 cmd_trace;820 unsigned long start_time;821 unsigned long io_duration_time;822 unsigned int hwq = 0;823 unsigned int mqtag = 0;824 unsigned int tag = 0;825 826 /* Decode the cmpl description to get the io_req id */827 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag);828 fcpio_tag_id_dec(&ftag, &id);829 icmnd_cmpl = &desc->u.icmnd_cmpl;830 831 mqtag = id;832 tag = blk_mq_unique_tag_to_tag(mqtag);833 hwq = blk_mq_unique_tag_to_hwq(mqtag);834 835 if (hwq != cq_index) {836 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,837 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",838 hwq, mqtag, tag, cq_index);839 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,840 "hdr status: %s icmnd completion on the wrong queue\n",841 fnic_fcpio_status_to_str(hdr_status));842 }843 844 if (tag >= fnic->fnic_max_tag_id) {845 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,846 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",847 hwq, mqtag, tag, cq_index);848 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,849 "hdr status: %s Out of range tag\n",850 fnic_fcpio_status_to_str(hdr_status));851 return;852 }853 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);854 855 sc = scsi_host_find_tag(fnic->lport->host, id);856 WARN_ON_ONCE(!sc);857 if (!sc) {858 atomic64_inc(&fnic_stats->io_stats.sc_null);859 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);860 shost_printk(KERN_ERR, fnic->lport->host,861 "icmnd_cmpl sc is null - "862 "hdr status = %s tag = 0x%x desc = 0x%p\n",863 fnic_fcpio_status_to_str(hdr_status), id, desc);864 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,865 fnic->lport->host->host_no, id,866 ((u64)icmnd_cmpl->_resvd0[1] << 16 |867 (u64)icmnd_cmpl->_resvd0[0]),868 ((u64)hdr_status << 16 |869 (u64)icmnd_cmpl->scsi_status << 8 |870 (u64)icmnd_cmpl->flags), desc,871 (u64)icmnd_cmpl->residual, 0);872 return;873 }874 875 io_req = fnic_priv(sc)->io_req;876 if (fnic->sw_copy_wq[hwq].io_req_table[tag] != io_req) {877 WARN(1, "%s: %d: hwq: %d mqtag: 0x%x tag: 0x%x io_req tag mismatch\n",878 __func__, __LINE__, hwq, mqtag, tag);879 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);880 return;881 }882 883 WARN_ON_ONCE(!io_req);884 if (!io_req) {885 atomic64_inc(&fnic_stats->io_stats.ioreq_null);886 fnic_priv(sc)->flags |= FNIC_IO_REQ_NULL;887 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);888 shost_printk(KERN_ERR, fnic->lport->host,889 "icmnd_cmpl io_req is null - "890 "hdr status = %s tag = 0x%x sc 0x%p\n",891 fnic_fcpio_status_to_str(hdr_status), id, sc);892 return;893 }894 start_time = io_req->start_time;895 896 /* firmware completed the io */897 io_req->io_completed = 1;898 899 /*900 * if SCSI-ML has already issued abort on this command,901 * set completion of the IO. The abts path will clean it up902 */903 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {904 905 /*906 * set the FNIC_IO_DONE so that this doesn't get907 * flagged as 'out of order' if it was not aborted908 */909 fnic_priv(sc)->flags |= FNIC_IO_DONE;910 fnic_priv(sc)->flags |= FNIC_IO_ABTS_PENDING;911 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);912 if(FCPIO_ABORTED == hdr_status)913 fnic_priv(sc)->flags |= FNIC_IO_ABORTED;914 915 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,916 "icmnd_cmpl abts pending "917 "hdr status = %s tag = 0x%x sc = 0x%p "918 "scsi_status = %x residual = %d\n",919 fnic_fcpio_status_to_str(hdr_status),920 id, sc,921 icmnd_cmpl->scsi_status,922 icmnd_cmpl->residual);923 return;924 }925 926 /* Mark the IO as complete */927 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;928 929 icmnd_cmpl = &desc->u.icmnd_cmpl;930 931 switch (hdr_status) {932 case FCPIO_SUCCESS:933 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;934 xfer_len = scsi_bufflen(sc);935 936 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) {937 xfer_len -= icmnd_cmpl->residual;938 scsi_set_resid(sc, icmnd_cmpl->residual);939 }940 941 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)942 atomic64_inc(&fnic_stats->misc_stats.check_condition);943 944 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)945 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);946 break;947 948 case FCPIO_TIMEOUT: /* request was timed out */949 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);950 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;951 break;952 953 case FCPIO_ABORTED: /* request was aborted */954 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);955 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;956 break;957 958 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */959 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);960 scsi_set_resid(sc, icmnd_cmpl->residual);961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;962 break;963 964 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */965 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);966 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;967 break;968 969 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */970 atomic64_inc(&fnic_stats->io_stats.io_not_found);971 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;972 break;973 974 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */975 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);976 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;977 break;978 979 case FCPIO_FW_ERR: /* request was terminated due fw error */980 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);981 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;982 break;983 984 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */985 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);986 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;987 break;988 989 case FCPIO_INVALID_HEADER: /* header contains invalid data */990 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */991 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */992 default:993 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;994 break;995 }996 997 /* Break link with the SCSI command */998 fnic_priv(sc)->io_req = NULL;999 io_req->sc = NULL;1000 fnic_priv(sc)->flags |= FNIC_IO_DONE;1001 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL;1002 1003 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1004 1005 if (hdr_status != FCPIO_SUCCESS) {1006 atomic64_inc(&fnic_stats->io_stats.io_failures);1007 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",1008 fnic_fcpio_status_to_str(hdr_status));1009 }1010 1011 fnic_release_ioreq_buf(fnic, io_req, sc);1012 1013 cmd_trace = ((u64)hdr_status << 56) |1014 (u64)icmnd_cmpl->scsi_status << 48 |1015 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |1016 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |1017 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];1018 1019 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,1020 sc->device->host->host_no, id, sc,1021 ((u64)icmnd_cmpl->_resvd0[1] << 56 |1022 (u64)icmnd_cmpl->_resvd0[0] << 48 |1023 jiffies_to_msecs(jiffies - start_time)),1024 desc, cmd_trace, fnic_flags_and_state(sc));1025 1026 if (sc->sc_data_direction == DMA_FROM_DEVICE) {1027 fnic->lport->host_stats.fcp_input_requests++;1028 fnic->fcp_input_bytes += xfer_len;1029 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {1030 fnic->lport->host_stats.fcp_output_requests++;1031 fnic->fcp_output_bytes += xfer_len;1032 } else1033 fnic->lport->host_stats.fcp_control_requests++;1034 1035 /* Call SCSI completion function to complete the IO */1036 scsi_done(sc);1037 1038 mempool_free(io_req, fnic->io_req_pool);1039 1040 atomic64_dec(&fnic_stats->io_stats.active_ios);1041 if (atomic64_read(&fnic->io_cmpl_skip))1042 atomic64_dec(&fnic->io_cmpl_skip);1043 else1044 atomic64_inc(&fnic_stats->io_stats.io_completions);1045 1046 1047 io_duration_time = jiffies_to_msecs(jiffies) -1048 jiffies_to_msecs(start_time);1049 1050 if(io_duration_time <= 10)1051 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);1052 else if(io_duration_time <= 100)1053 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);1054 else if(io_duration_time <= 500)1055 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);1056 else if(io_duration_time <= 5000)1057 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);1058 else if(io_duration_time <= 10000)1059 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);1060 else if(io_duration_time <= 30000)1061 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);1062 else {1063 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);1064 1065 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))1066 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);1067 }1068}1069 1070/* fnic_fcpio_itmf_cmpl_handler1071 * Routine to handle itmf completions1072 */1073static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, unsigned int cq_index,1074 struct fcpio_fw_req *desc)1075{1076 u8 type;1077 u8 hdr_status;1078 struct fcpio_tag ftag;1079 u32 id;1080 struct scsi_cmnd *sc = NULL;1081 struct fnic_io_req *io_req;1082 struct fnic_stats *fnic_stats = &fnic->fnic_stats;1083 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;1084 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;1085 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;1086 unsigned long flags;1087 unsigned long start_time;1088 unsigned int hwq = cq_index;1089 unsigned int mqtag;1090 unsigned int tag;1091 1092 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag);1093 fcpio_tag_id_dec(&ftag, &id);1094 1095 mqtag = id & FNIC_TAG_MASK;1096 tag = blk_mq_unique_tag_to_tag(id & FNIC_TAG_MASK);1097 hwq = blk_mq_unique_tag_to_hwq(id & FNIC_TAG_MASK);1098 1099 if (hwq != cq_index) {1100 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1101 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",1102 hwq, mqtag, tag, cq_index);1103 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1104 "hdr status: %s ITMF completion on the wrong queue\n",1105 fnic_fcpio_status_to_str(hdr_status));1106 }1107 1108 if (tag > fnic->fnic_max_tag_id) {1109 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1110 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",1111 hwq, mqtag, tag, cq_index);1112 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1113 "hdr status: %s Tag out of range\n",1114 fnic_fcpio_status_to_str(hdr_status));1115 return;1116 } else if ((tag == fnic->fnic_max_tag_id) && !(id & FNIC_TAG_DEV_RST)) {1117 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1118 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ",1119 hwq, mqtag, tag, cq_index);1120 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1121 "hdr status: %s Tag out of range\n",1122 fnic_fcpio_status_to_str(hdr_status));1123 return;1124 }1125 1126 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1127 1128 /* If it is sg3utils allocated SC then tag_id1129 * is max_tag_id and SC is retrieved from io_req1130 */1131 if ((mqtag == fnic->fnic_max_tag_id) && (id & FNIC_TAG_DEV_RST)) {1132 io_req = fnic->sw_copy_wq[hwq].io_req_table[tag];1133 if (io_req)1134 sc = io_req->sc;1135 } else {1136 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);1137 }1138 1139 WARN_ON_ONCE(!sc);1140 if (!sc) {1141 atomic64_inc(&fnic_stats->io_stats.sc_null);1142 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1143 shost_printk(KERN_ERR, fnic->lport->host,1144 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",1145 fnic_fcpio_status_to_str(hdr_status), tag);1146 return;1147 }1148 1149 io_req = fnic_priv(sc)->io_req;1150 WARN_ON_ONCE(!io_req);1151 if (!io_req) {1152 atomic64_inc(&fnic_stats->io_stats.ioreq_null);1153 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1154 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;1155 shost_printk(KERN_ERR, fnic->lport->host,1156 "itmf_cmpl io_req is null - "1157 "hdr status = %s tag = 0x%x sc 0x%p\n",1158 fnic_fcpio_status_to_str(hdr_status), tag, sc);1159 return;1160 }1161 start_time = io_req->start_time;1162 1163 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {1164 /* Abort and terminate completion of device reset req */1165 /* REVISIT : Add asserts about various flags */1166 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,1167 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Abt/term completion received\n",1168 hwq, mqtag, tag,1169 fnic_fcpio_status_to_str(hdr_status));1170 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;1171 fnic_priv(sc)->abts_status = hdr_status;1172 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;1173 if (io_req->abts_done)1174 complete(io_req->abts_done);1175 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1176 } else if (id & FNIC_TAG_ABORT) {1177 /* Completion of abort cmd */1178 shost_printk(KERN_DEBUG, fnic->lport->host,1179 "hwq: %d mqtag: 0x%x tag: 0x%x Abort header status: %s\n",1180 hwq, mqtag, tag,1181 fnic_fcpio_status_to_str(hdr_status));1182 switch (hdr_status) {1183 case FCPIO_SUCCESS:1184 break;1185 case FCPIO_TIMEOUT:1186 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)1187 atomic64_inc(&abts_stats->abort_fw_timeouts);1188 else1189 atomic64_inc(1190 &term_stats->terminate_fw_timeouts);1191 break;1192 case FCPIO_ITMF_REJECTED:1193 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,1194 "abort reject recd. id %d\n",1195 (int)(id & FNIC_TAG_MASK));1196 break;1197 case FCPIO_IO_NOT_FOUND:1198 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)1199 atomic64_inc(&abts_stats->abort_io_not_found);1200 else1201 atomic64_inc(1202 &term_stats->terminate_io_not_found);1203 break;1204 default:1205 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED)1206 atomic64_inc(&abts_stats->abort_failures);1207 else1208 atomic64_inc(1209 &term_stats->terminate_failures);1210 break;1211 }1212 if (fnic_priv(sc)->state != FNIC_IOREQ_ABTS_PENDING) {1213 /* This is a late completion. Ignore it */1214 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1215 return;1216 }1217 1218 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE;1219 fnic_priv(sc)->abts_status = hdr_status;1220 1221 /* If the status is IO not found consider it as success */1222 if (hdr_status == FCPIO_IO_NOT_FOUND)1223 fnic_priv(sc)->abts_status = FCPIO_SUCCESS;1224 1225 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE)))1226 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);1227 1228 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1229 "abts cmpl recd. id %d status %s\n",1230 (int)(id & FNIC_TAG_MASK),1231 fnic_fcpio_status_to_str(hdr_status));1232 1233 /*1234 * If scsi_eh thread is blocked waiting for abts to complete,1235 * signal completion to it. IO will be cleaned in the thread1236 * else clean it in this context1237 */1238 if (io_req->abts_done) {1239 complete(io_req->abts_done);1240 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1241 shost_printk(KERN_INFO, fnic->lport->host,1242 "hwq: %d mqtag: 0x%x tag: 0x%x Waking up abort thread\n",1243 hwq, mqtag, tag);1244 } else {1245 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1246 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Completing IO\n",1247 hwq, mqtag,1248 tag, fnic_fcpio_status_to_str(hdr_status));1249 fnic_priv(sc)->io_req = NULL;1250 sc->result = (DID_ERROR << 16);1251 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL;1252 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1253 1254 fnic_release_ioreq_buf(fnic, io_req, sc);1255 mempool_free(io_req, fnic->io_req_pool);1256 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,1257 sc->device->host->host_no, id,1258 sc,1259 jiffies_to_msecs(jiffies - start_time),1260 desc,1261 (((u64)hdr_status << 40) |1262 (u64)sc->cmnd[0] << 32 |1263 (u64)sc->cmnd[2] << 24 |1264 (u64)sc->cmnd[3] << 16 |1265 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),1266 fnic_flags_and_state(sc));1267 scsi_done(sc);1268 atomic64_dec(&fnic_stats->io_stats.active_ios);1269 if (atomic64_read(&fnic->io_cmpl_skip))1270 atomic64_dec(&fnic->io_cmpl_skip);1271 else1272 atomic64_inc(&fnic_stats->io_stats.io_completions);1273 }1274 } else if (id & FNIC_TAG_DEV_RST) {1275 /* Completion of device reset */1276 shost_printk(KERN_INFO, fnic->lport->host,1277 "hwq: %d mqtag: 0x%x tag: 0x%x DR hst: %s\n",1278 hwq, mqtag,1279 tag, fnic_fcpio_status_to_str(hdr_status));1280 fnic_priv(sc)->lr_status = hdr_status;1281 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {1282 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1283 fnic_priv(sc)->flags |= FNIC_DEV_RST_ABTS_PENDING;1284 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,1285 sc->device->host->host_no, id, sc,1286 jiffies_to_msecs(jiffies - start_time),1287 desc, 0, fnic_flags_and_state(sc));1288 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1289 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Terminate pending\n",1290 hwq, mqtag,1291 tag, fnic_fcpio_status_to_str(hdr_status));1292 return;1293 }1294 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TIMED_OUT) {1295 /* Need to wait for terminate completion */1296 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1297 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,1298 sc->device->host->host_no, id, sc,1299 jiffies_to_msecs(jiffies - start_time),1300 desc, 0, fnic_flags_and_state(sc));1301 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1302 "dev reset cmpl recd after time out. "1303 "id %d status %s\n",1304 (int)(id & FNIC_TAG_MASK),1305 fnic_fcpio_status_to_str(hdr_status));1306 return;1307 }1308 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE;1309 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;1310 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,1311 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s DR completion received\n",1312 hwq, mqtag,1313 tag, fnic_fcpio_status_to_str(hdr_status));1314 if (io_req->dr_done)1315 complete(io_req->dr_done);1316 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1317 1318 } else {1319 shost_printk(KERN_ERR, fnic->lport->host,1320 "%s: Unexpected itmf io state: hwq: %d tag 0x%x %s\n",1321 __func__, hwq, id, fnic_ioreq_state_to_str(fnic_priv(sc)->state));1322 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1323 }1324 1325}1326 1327/*1328 * fnic_fcpio_cmpl_handler1329 * Routine to service the cq for wq_copy1330 */1331static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,1332 unsigned int cq_index,1333 struct fcpio_fw_req *desc)1334{1335 struct fnic *fnic = vnic_dev_priv(vdev);1336 1337 switch (desc->hdr.type) {1338 case FCPIO_ICMND_CMPL: /* fw completed a command */1339 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/1340 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */1341 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */1342 case FCPIO_RESET_CMPL: /* fw completed reset */1343 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);1344 break;1345 default:1346 break;1347 }1348 1349 cq_index -= fnic->copy_wq_base;1350 1351 switch (desc->hdr.type) {1352 case FCPIO_ACK: /* fw copied copy wq desc to its queue */1353 fnic_fcpio_ack_handler(fnic, cq_index, desc);1354 break;1355 1356 case FCPIO_ICMND_CMPL: /* fw completed a command */1357 fnic_fcpio_icmnd_cmpl_handler(fnic, cq_index, desc);1358 break;1359 1360 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/1361 fnic_fcpio_itmf_cmpl_handler(fnic, cq_index, desc);1362 break;1363 1364 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */1365 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */1366 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);1367 break;1368 1369 case FCPIO_RESET_CMPL: /* fw completed reset */1370 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);1371 break;1372 1373 default:1374 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1375 "firmware completion type %d\n",1376 desc->hdr.type);1377 break;1378 }1379 1380 return 0;1381}1382 1383/*1384 * fnic_wq_copy_cmpl_handler1385 * Routine to process wq copy1386 */1387int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do, unsigned int cq_index)1388{1389 unsigned int cur_work_done;1390 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;1391 u64 start_jiffies = 0;1392 u64 end_jiffies = 0;1393 u64 delta_jiffies = 0;1394 u64 delta_ms = 0;1395 1396 start_jiffies = jiffies;1397 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],1398 fnic_fcpio_cmpl_handler,1399 copy_work_to_do);1400 end_jiffies = jiffies;1401 delta_jiffies = end_jiffies - start_jiffies;1402 if (delta_jiffies > (u64) atomic64_read(&misc_stats->max_isr_jiffies)) {1403 atomic64_set(&misc_stats->max_isr_jiffies, delta_jiffies);1404 delta_ms = jiffies_to_msecs(delta_jiffies);1405 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms);1406 atomic64_set(&misc_stats->corr_work_done, cur_work_done);1407 }1408 1409 return cur_work_done;1410}1411 1412static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data)1413{1414 struct request *const rq = scsi_cmd_to_rq(sc);1415 struct fnic *fnic = data;1416 struct fnic_io_req *io_req;1417 unsigned long flags = 0;1418 unsigned long start_time = 0;1419 struct fnic_stats *fnic_stats = &fnic->fnic_stats;1420 uint16_t hwq = 0;1421 int tag;1422 int mqtag;1423 1424 mqtag = blk_mq_unique_tag(rq);1425 hwq = blk_mq_unique_tag_to_hwq(mqtag);1426 tag = blk_mq_unique_tag_to_tag(mqtag);1427 1428 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1429 1430 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL;1431 1432 io_req = fnic_priv(sc)->io_req;1433 if (!io_req) {1434 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1435 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1436 "hwq: %d mqtag: 0x%x tag: 0x%x flags: 0x%x No ioreq. Returning\n",1437 hwq, mqtag, tag, fnic_priv(sc)->flags);1438 return true;1439 }1440 1441 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&1442 !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) {1443 /*1444 * We will be here only when FW completes reset1445 * without sending completions for outstanding ios.1446 */1447 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE;1448 if (io_req && io_req->dr_done)1449 complete(io_req->dr_done);1450 else if (io_req && io_req->abts_done)1451 complete(io_req->abts_done);1452 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1453 return true;1454 } else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {1455 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1456 return true;1457 }1458 1459 fnic_priv(sc)->io_req = NULL;1460 io_req->sc = NULL;1461 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1462 1463 /*1464 * If there is a scsi_cmnd associated with this io_req, then1465 * free the corresponding state1466 */1467 start_time = io_req->start_time;1468 fnic_release_ioreq_buf(fnic, io_req, sc);1469 mempool_free(io_req, fnic->io_req_pool);1470 1471 sc->result = DID_TRANSPORT_DISRUPTED << 16;1472 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1473 "mqtag:0x%x tag: 0x%x sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",1474 mqtag, tag, sc, (jiffies - start_time));1475 1476 if (atomic64_read(&fnic->io_cmpl_skip))1477 atomic64_dec(&fnic->io_cmpl_skip);1478 else1479 atomic64_inc(&fnic_stats->io_stats.io_completions);1480 1481 FNIC_TRACE(fnic_cleanup_io,1482 sc->device->host->host_no, tag, sc,1483 jiffies_to_msecs(jiffies - start_time),1484 0, ((u64)sc->cmnd[0] << 32 |1485 (u64)sc->cmnd[2] << 24 |1486 (u64)sc->cmnd[3] << 16 |1487 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),1488 fnic_flags_and_state(sc));1489 1490 scsi_done(sc);1491 1492 return true;1493}1494 1495static void fnic_cleanup_io(struct fnic *fnic)1496{1497 scsi_host_busy_iter(fnic->lport->host,1498 fnic_cleanup_io_iter, fnic);1499}1500 1501void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,1502 struct fcpio_host_req *desc)1503{1504 u32 id;1505 struct fnic *fnic = vnic_dev_priv(wq->vdev);1506 struct fnic_io_req *io_req;1507 struct scsi_cmnd *sc;1508 unsigned long flags;1509 unsigned long start_time = 0;1510 uint16_t hwq;1511 1512 /* get the tag reference */1513 fcpio_tag_id_dec(&desc->hdr.tag, &id);1514 id &= FNIC_TAG_MASK;1515 1516 if (id >= fnic->fnic_max_tag_id)1517 return;1518 1519 sc = scsi_host_find_tag(fnic->lport->host, id);1520 if (!sc)1521 return;1522 1523 hwq = blk_mq_unique_tag_to_hwq(id);1524 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1525 1526 /* Get the IO context which this desc refers to */1527 io_req = fnic_priv(sc)->io_req;1528 1529 /* fnic interrupts are turned off by now */1530 1531 if (!io_req) {1532 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1533 goto wq_copy_cleanup_scsi_cmd;1534 }1535 1536 fnic_priv(sc)->io_req = NULL;1537 io_req->sc = NULL;1538 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(id)] = NULL;1539 1540 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1541 1542 start_time = io_req->start_time;1543 fnic_release_ioreq_buf(fnic, io_req, sc);1544 mempool_free(io_req, fnic->io_req_pool);1545 1546wq_copy_cleanup_scsi_cmd:1547 sc->result = DID_NO_CONNECT << 16;1548 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, "wq_copy_cleanup_handler:"1549 " DID_NO_CONNECT\n");1550 1551 FNIC_TRACE(fnic_wq_copy_cleanup_handler,1552 sc->device->host->host_no, id, sc,1553 jiffies_to_msecs(jiffies - start_time),1554 0, ((u64)sc->cmnd[0] << 32 |1555 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |1556 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),1557 fnic_flags_and_state(sc));1558 1559 scsi_done(sc);1560}1561 1562static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,1563 u32 task_req, u8 *fc_lun,1564 struct fnic_io_req *io_req,1565 unsigned int hwq)1566{1567 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[hwq];1568 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;1569 unsigned long flags;1570 1571 spin_lock_irqsave(&fnic->fnic_lock, flags);1572 if (unlikely(fnic_chk_state_flags_locked(fnic,1573 FNIC_FLAGS_IO_BLOCKED))) {1574 spin_unlock_irqrestore(&fnic->fnic_lock, flags);1575 return 1;1576 } else1577 atomic_inc(&fnic->in_flight);1578 spin_unlock_irqrestore(&fnic->fnic_lock, flags);1579 1580 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1581 1582 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq])1583 free_wq_copy_descs(fnic, wq, hwq);1584 1585 if (!vnic_wq_copy_desc_avail(wq)) {1586 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1587 atomic_dec(&fnic->in_flight);1588 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1589 "fnic_queue_abort_io_req: failure: no descriptors\n");1590 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);1591 return 1;1592 }1593 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,1594 0, task_req, tag, fc_lun, io_req->port_id,1595 fnic->config.ra_tov, fnic->config.ed_tov);1596 1597 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);1598 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >1599 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))1600 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,1601 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));1602 1603 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1604 atomic_dec(&fnic->in_flight);1605 1606 return 0;1607}1608 1609struct fnic_rport_abort_io_iter_data {1610 struct fnic *fnic;1611 u32 port_id;1612 int term_cnt;1613};1614 1615static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)1616{1617 struct request *const rq = scsi_cmd_to_rq(sc);1618 struct fnic_rport_abort_io_iter_data *iter_data = data;1619 struct fnic *fnic = iter_data->fnic;1620 int abt_tag = 0;1621 struct fnic_io_req *io_req;1622 unsigned long flags;1623 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;1624 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;1625 struct scsi_lun fc_lun;1626 enum fnic_ioreq_state old_ioreq_state;1627 uint16_t hwq = 0;1628 1629 abt_tag = blk_mq_unique_tag(rq);1630 hwq = blk_mq_unique_tag_to_hwq(abt_tag);1631 1632 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1633 1634 io_req = fnic_priv(sc)->io_req;1635 1636 if (!io_req || io_req->port_id != iter_data->port_id) {1637 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1638 return true;1639 }1640 1641 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&1642 !(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED)) {1643 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1644 "hwq: %d abt_tag: 0x%x flags: 0x%x Device reset is not pending\n",1645 hwq, abt_tag, fnic_priv(sc)->flags);1646 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1647 return true;1648 }1649 1650 /*1651 * Found IO that is still pending with firmware and1652 * belongs to rport that went away1653 */1654 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {1655 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1656 return true;1657 }1658 if (io_req->abts_done) {1659 shost_printk(KERN_ERR, fnic->lport->host,1660 "fnic_rport_exch_reset: io_req->abts_done is set "1661 "state is %s\n",1662 fnic_ioreq_state_to_str(fnic_priv(sc)->state));1663 }1664 1665 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) {1666 shost_printk(KERN_ERR, fnic->lport->host,1667 "rport_exch_reset "1668 "IO not yet issued %p tag 0x%x flags "1669 "%x state %d\n",1670 sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state);1671 }1672 old_ioreq_state = fnic_priv(sc)->state;1673 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;1674 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;1675 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {1676 atomic64_inc(&reset_stats->device_reset_terminates);1677 abt_tag |= FNIC_TAG_DEV_RST;1678 }1679 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1680 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc);1681 BUG_ON(io_req->abts_done);1682 1683 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1684 "fnic_rport_reset_exch: Issuing abts\n");1685 1686 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1687 1688 /* Now queue the abort command to firmware */1689 int_to_scsilun(sc->device->lun, &fc_lun);1690 1691 if (fnic_queue_abort_io_req(fnic, abt_tag,1692 FCPIO_ITMF_ABT_TASK_TERM,1693 fc_lun.scsi_lun, io_req, hwq)) {1694 /*1695 * Revert the cmd state back to old state, if1696 * it hasn't changed in between. This cmd will get1697 * aborted later by scsi_eh, or cleaned up during1698 * lun reset1699 */1700 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1701 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1702 "hwq: %d abt_tag: 0x%x flags: 0x%x Queuing abort failed\n",1703 hwq, abt_tag, fnic_priv(sc)->flags);1704 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)1705 fnic_priv(sc)->state = old_ioreq_state;1706 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1707 } else {1708 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1709 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET)1710 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;1711 else1712 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;1713 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1714 atomic64_inc(&term_stats->terminates);1715 iter_data->term_cnt++;1716 }1717 return true;1718}1719 1720static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)1721{1722 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;1723 struct fnic_rport_abort_io_iter_data iter_data = {1724 .fnic = fnic,1725 .port_id = port_id,1726 .term_cnt = 0,1727 };1728 1729 FNIC_SCSI_DBG(KERN_DEBUG,1730 fnic->lport->host, fnic->fnic_num,1731 "fnic_rport_exch_reset called portid 0x%06x\n",1732 port_id);1733 1734 if (fnic->in_remove)1735 return;1736 1737 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter,1738 &iter_data);1739 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates))1740 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt);1741 1742}1743 1744void fnic_terminate_rport_io(struct fc_rport *rport)1745{1746 struct fc_rport_libfc_priv *rdata;1747 struct fc_lport *lport;1748 struct fnic *fnic;1749 1750 if (!rport) {1751 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");1752 return;1753 }1754 rdata = rport->dd_data;1755 1756 if (!rdata) {1757 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");1758 return;1759 }1760 lport = rdata->local_port;1761 1762 if (!lport) {1763 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");1764 return;1765 }1766 fnic = lport_priv(lport);1767 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1768 "wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",1769 rport->port_name, rport->node_name, rport,1770 rport->port_id);1771 1772 if (fnic->in_remove)1773 return;1774 1775 fnic_rport_exch_reset(fnic, rport->port_id);1776}1777 1778/*1779 * This function is exported to SCSI for sending abort cmnds.1780 * A SCSI IO is represented by a io_req in the driver.1781 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.1782 */1783int fnic_abort_cmd(struct scsi_cmnd *sc)1784{1785 struct request *const rq = scsi_cmd_to_rq(sc);1786 struct fc_lport *lp;1787 struct fnic *fnic;1788 struct fnic_io_req *io_req = NULL;1789 struct fc_rport *rport;1790 unsigned long flags;1791 unsigned long start_time = 0;1792 int ret = SUCCESS;1793 u32 task_req = 0;1794 struct scsi_lun fc_lun;1795 struct fnic_stats *fnic_stats;1796 struct abort_stats *abts_stats;1797 struct terminate_stats *term_stats;1798 enum fnic_ioreq_state old_ioreq_state;1799 int mqtag;1800 unsigned long abt_issued_time;1801 uint16_t hwq = 0;1802 1803 DECLARE_COMPLETION_ONSTACK(tm_done);1804 1805 /* Wait for rport to unblock */1806 fc_block_scsi_eh(sc);1807 1808 /* Get local-port, check ready and link up */1809 lp = shost_priv(sc->device->host);1810 1811 fnic = lport_priv(lp);1812 1813 spin_lock_irqsave(&fnic->fnic_lock, flags);1814 fnic_stats = &fnic->fnic_stats;1815 abts_stats = &fnic->fnic_stats.abts_stats;1816 term_stats = &fnic->fnic_stats.term_stats;1817 1818 rport = starget_to_rport(scsi_target(sc->device));1819 mqtag = blk_mq_unique_tag(rq);1820 hwq = blk_mq_unique_tag_to_hwq(mqtag);1821 1822 fnic_priv(sc)->flags = FNIC_NO_FLAGS;1823 1824 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {1825 ret = FAILED;1826 spin_unlock_irqrestore(&fnic->fnic_lock, flags);1827 goto fnic_abort_cmd_end;1828 }1829 1830 spin_unlock_irqrestore(&fnic->fnic_lock, flags);1831 /*1832 * Avoid a race between SCSI issuing the abort and the device1833 * completing the command.1834 *1835 * If the command is already completed by the fw cmpl code,1836 * we just return SUCCESS from here. This means that the abort1837 * succeeded. In the SCSI ML, since the timeout for command has1838 * happened, the completion wont actually complete the command1839 * and it will be considered as an aborted command1840 *1841 * .io_req will not be cleared except while holding io_req_lock.1842 */1843 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1844 io_req = fnic_priv(sc)->io_req;1845 if (!io_req) {1846 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1847 goto fnic_abort_cmd_end;1848 }1849 1850 io_req->abts_done = &tm_done;1851 1852 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {1853 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1854 goto wait_pending;1855 }1856 1857 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);1858 if (abt_issued_time <= 6000)1859 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);1860 else if (abt_issued_time > 6000 && abt_issued_time <= 20000)1861 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);1862 else if (abt_issued_time > 20000 && abt_issued_time <= 30000)1863 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);1864 else if (abt_issued_time > 30000 && abt_issued_time <= 40000)1865 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);1866 else if (abt_issued_time > 40000 && abt_issued_time <= 50000)1867 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);1868 else if (abt_issued_time > 50000 && abt_issued_time <= 60000)1869 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);1870 else1871 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);1872 1873 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,1874 "CDB Opcode: 0x%02x Abort issued time: %lu msec\n",1875 sc->cmnd[0], abt_issued_time);1876 /*1877 * Command is still pending, need to abort it1878 * If the firmware completes the command after this point,1879 * the completion wont be done till mid-layer, since abort1880 * has already started.1881 */1882 old_ioreq_state = fnic_priv(sc)->state;1883 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;1884 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;1885 1886 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1887 1888 /*1889 * Check readiness of the remote port. If the path to remote1890 * port is up, then send abts to the remote port to terminate1891 * the IO. Else, just locally terminate the IO in the firmware1892 */1893 if (fc_remote_port_chkready(rport) == 0)1894 task_req = FCPIO_ITMF_ABT_TASK;1895 else {1896 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);1897 task_req = FCPIO_ITMF_ABT_TASK_TERM;1898 }1899 1900 /* Now queue the abort command to firmware */1901 int_to_scsilun(sc->device->lun, &fc_lun);1902 1903 if (fnic_queue_abort_io_req(fnic, mqtag, task_req, fc_lun.scsi_lun,1904 io_req, hwq)) {1905 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1906 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)1907 fnic_priv(sc)->state = old_ioreq_state;1908 io_req = fnic_priv(sc)->io_req;1909 if (io_req)1910 io_req->abts_done = NULL;1911 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1912 ret = FAILED;1913 goto fnic_abort_cmd_end;1914 }1915 if (task_req == FCPIO_ITMF_ABT_TASK) {1916 fnic_priv(sc)->flags |= FNIC_IO_ABTS_ISSUED;1917 atomic64_inc(&fnic_stats->abts_stats.aborts);1918 } else {1919 fnic_priv(sc)->flags |= FNIC_IO_TERM_ISSUED;1920 atomic64_inc(&fnic_stats->term_stats.terminates);1921 }1922 1923 /*1924 * We queued an abort IO, wait for its completion.1925 * Once the firmware completes the abort command, it will1926 * wake up this thread.1927 */1928 wait_pending:1929 wait_for_completion_timeout(&tm_done,1930 msecs_to_jiffies1931 (2 * fnic->config.ra_tov +1932 fnic->config.ed_tov));1933 1934 /* Check the abort status */1935 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);1936 1937 io_req = fnic_priv(sc)->io_req;1938 if (!io_req) {1939 atomic64_inc(&fnic_stats->io_stats.ioreq_null);1940 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1941 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;1942 ret = FAILED;1943 goto fnic_abort_cmd_end;1944 }1945 io_req->abts_done = NULL;1946 1947 /* fw did not complete abort, timed out */1948 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) {1949 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1950 if (task_req == FCPIO_ITMF_ABT_TASK) {1951 atomic64_inc(&abts_stats->abort_drv_timeouts);1952 } else {1953 atomic64_inc(&term_stats->terminate_drv_timeouts);1954 }1955 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT;1956 ret = FAILED;1957 goto fnic_abort_cmd_end;1958 }1959 1960 /* IO out of order */1961 1962 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {1963 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1964 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,1965 "Issuing host reset due to out of order IO\n");1966 1967 ret = FAILED;1968 goto fnic_abort_cmd_end;1969 }1970 1971 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;1972 1973 start_time = io_req->start_time;1974 /*1975 * firmware completed the abort, check the status,1976 * free the io_req if successful. If abort fails,1977 * Device reset will clean the I/O.1978 */1979 if (fnic_priv(sc)->abts_status == FCPIO_SUCCESS ||1980 (fnic_priv(sc)->abts_status == FCPIO_ABORTED)) {1981 fnic_priv(sc)->io_req = NULL;1982 io_req->sc = NULL;1983 } else {1984 ret = FAILED;1985 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1986 goto fnic_abort_cmd_end;1987 }1988 1989 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = NULL;1990 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);1991 1992 fnic_release_ioreq_buf(fnic, io_req, sc);1993 mempool_free(io_req, fnic->io_req_pool);1994 1995 /* Call SCSI completion function to complete the IO */1996 sc->result = DID_ABORT << 16;1997 scsi_done(sc);1998 atomic64_dec(&fnic_stats->io_stats.active_ios);1999 if (atomic64_read(&fnic->io_cmpl_skip))2000 atomic64_dec(&fnic->io_cmpl_skip);2001 else2002 atomic64_inc(&fnic_stats->io_stats.io_completions);2003 2004fnic_abort_cmd_end:2005 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, mqtag, sc,2006 jiffies_to_msecs(jiffies - start_time),2007 0, ((u64)sc->cmnd[0] << 32 |2008 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |2009 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),2010 fnic_flags_and_state(sc));2011 2012 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2013 "Returning from abort cmd type %x %s\n", task_req,2014 (ret == SUCCESS) ?2015 "SUCCESS" : "FAILED");2016 return ret;2017}2018 2019static inline int fnic_queue_dr_io_req(struct fnic *fnic,2020 struct scsi_cmnd *sc,2021 struct fnic_io_req *io_req)2022{2023 struct vnic_wq_copy *wq;2024 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;2025 struct scsi_lun fc_lun;2026 int ret = 0;2027 unsigned long flags;2028 uint16_t hwq = 0;2029 uint32_t tag = 0;2030 2031 tag = io_req->tag;2032 hwq = blk_mq_unique_tag_to_hwq(tag);2033 wq = &fnic->hw_copy_wq[hwq];2034 2035 spin_lock_irqsave(&fnic->fnic_lock, flags);2036 if (unlikely(fnic_chk_state_flags_locked(fnic,2037 FNIC_FLAGS_IO_BLOCKED))) {2038 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2039 return FAILED;2040 } else2041 atomic_inc(&fnic->in_flight);2042 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2043 2044 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2045 2046 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq])2047 free_wq_copy_descs(fnic, wq, hwq);2048 2049 if (!vnic_wq_copy_desc_avail(wq)) {2050 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2051 "queue_dr_io_req failure - no descriptors\n");2052 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);2053 ret = -EAGAIN;2054 goto lr_io_req_end;2055 }2056 2057 /* fill in the lun info */2058 int_to_scsilun(sc->device->lun, &fc_lun);2059 2060 tag |= FNIC_TAG_DEV_RST;2061 fnic_queue_wq_copy_desc_itmf(wq, tag,2062 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,2063 fc_lun.scsi_lun, io_req->port_id,2064 fnic->config.ra_tov, fnic->config.ed_tov);2065 2066 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);2067 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >2068 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))2069 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,2070 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));2071 2072lr_io_req_end:2073 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2074 atomic_dec(&fnic->in_flight);2075 2076 return ret;2077}2078 2079struct fnic_pending_aborts_iter_data {2080 struct fnic *fnic;2081 struct scsi_cmnd *lr_sc;2082 struct scsi_device *lun_dev;2083 int ret;2084};2085 2086static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, void *data)2087{2088 struct request *const rq = scsi_cmd_to_rq(sc);2089 struct fnic_pending_aborts_iter_data *iter_data = data;2090 struct fnic *fnic = iter_data->fnic;2091 struct scsi_device *lun_dev = iter_data->lun_dev;2092 unsigned long abt_tag = 0;2093 uint16_t hwq = 0;2094 struct fnic_io_req *io_req;2095 unsigned long flags;2096 struct scsi_lun fc_lun;2097 DECLARE_COMPLETION_ONSTACK(tm_done);2098 enum fnic_ioreq_state old_ioreq_state;2099 2100 if (sc == iter_data->lr_sc || sc->device != lun_dev)2101 return true;2102 2103 abt_tag = blk_mq_unique_tag(rq);2104 hwq = blk_mq_unique_tag_to_hwq(abt_tag);2105 2106 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2107 io_req = fnic_priv(sc)->io_req;2108 if (!io_req) {2109 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2110 return true;2111 }2112 2113 /*2114 * Found IO that is still pending with firmware and2115 * belongs to the LUN that we are resetting2116 */2117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2118 "Found IO in %s on lun\n",2119 fnic_ioreq_state_to_str(fnic_priv(sc)->state));2120 2121 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) {2122 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2123 return true;2124 }2125 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) &&2126 (!(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED))) {2127 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,2128 "dev rst not pending sc 0x%p\n", sc);2129 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2130 return true;2131 }2132 2133 if (io_req->abts_done)2134 shost_printk(KERN_ERR, fnic->lport->host,2135 "%s: io_req->abts_done is set state is %s\n",2136 __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state));2137 old_ioreq_state = fnic_priv(sc)->state;2138 /*2139 * Any pending IO issued prior to reset is expected to be2140 * in abts pending state, if not we need to set2141 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.2142 * When IO is completed, the IO will be handed over and2143 * handled in this function.2144 */2145 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;2146 2147 BUG_ON(io_req->abts_done);2148 2149 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) {2150 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,2151 "dev rst sc 0x%p\n", sc);2152 }2153 2154 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE;2155 io_req->abts_done = &tm_done;2156 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2157 2158 /* Now queue the abort command to firmware */2159 int_to_scsilun(sc->device->lun, &fc_lun);2160 2161 if (fnic_queue_abort_io_req(fnic, abt_tag,2162 FCPIO_ITMF_ABT_TASK_TERM,2163 fc_lun.scsi_lun, io_req, hwq)) {2164 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2165 io_req = fnic_priv(sc)->io_req;2166 if (io_req)2167 io_req->abts_done = NULL;2168 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING)2169 fnic_priv(sc)->state = old_ioreq_state;2170 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2171 iter_data->ret = FAILED;2172 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,2173 "hwq: %d abt_tag: 0x%lx Abort could not be queued\n",2174 hwq, abt_tag);2175 return false;2176 } else {2177 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2178 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET)2179 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;2180 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2181 }2182 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;2183 2184 wait_for_completion_timeout(&tm_done, msecs_to_jiffies2185 (fnic->config.ed_tov));2186 2187 /* Recheck cmd state to check if it is now aborted */2188 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2189 io_req = fnic_priv(sc)->io_req;2190 if (!io_req) {2191 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2192 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;2193 return true;2194 }2195 2196 io_req->abts_done = NULL;2197 2198 /* if abort is still pending with fw, fail */2199 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) {2200 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2201 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE;2202 iter_data->ret = FAILED;2203 return false;2204 }2205 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE;2206 2207 /* original sc used for lr is handled by dev reset code */2208 if (sc != iter_data->lr_sc) {2209 fnic_priv(sc)->io_req = NULL;2210 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(abt_tag)] = NULL;2211 }2212 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2213 2214 /* original sc used for lr is handled by dev reset code */2215 if (sc != iter_data->lr_sc) {2216 fnic_release_ioreq_buf(fnic, io_req, sc);2217 mempool_free(io_req, fnic->io_req_pool);2218 }2219 2220 /*2221 * Any IO is returned during reset, it needs to call scsi_done2222 * to return the scsi_cmnd to upper layer.2223 */2224 /* Set result to let upper SCSI layer retry */2225 sc->result = DID_RESET << 16;2226 scsi_done(sc);2227 2228 return true;2229}2230 2231/*2232 * Clean up any pending aborts on the lun2233 * For each outstanding IO on this lun, whose abort is not completed by fw,2234 * issue a local abort. Wait for abort to complete. Return 0 if all commands2235 * successfully aborted, 1 otherwise2236 */2237static int fnic_clean_pending_aborts(struct fnic *fnic,2238 struct scsi_cmnd *lr_sc,2239 bool new_sc)2240 2241{2242 int ret = 0;2243 struct fnic_pending_aborts_iter_data iter_data = {2244 .fnic = fnic,2245 .lun_dev = lr_sc->device,2246 .ret = SUCCESS,2247 };2248 2249 iter_data.lr_sc = lr_sc;2250 2251 scsi_host_busy_iter(fnic->lport->host,2252 fnic_pending_aborts_iter, &iter_data);2253 if (iter_data.ret == FAILED) {2254 ret = iter_data.ret;2255 goto clean_pending_aborts_end;2256 }2257 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));2258 2259 /* walk again to check, if IOs are still pending in fw */2260 if (fnic_is_abts_pending(fnic, lr_sc))2261 ret = 1;2262 2263clean_pending_aborts_end:2264 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,2265 "exit status: %d\n", ret);2266 return ret;2267}2268 2269/*2270 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN2271 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command2272 * on the LUN.2273 */2274int fnic_device_reset(struct scsi_cmnd *sc)2275{2276 struct request *rq = scsi_cmd_to_rq(sc);2277 struct fc_lport *lp;2278 struct fnic *fnic;2279 struct fnic_io_req *io_req = NULL;2280 struct fc_rport *rport;2281 int status;2282 int ret = FAILED;2283 unsigned long flags;2284 unsigned long start_time = 0;2285 struct scsi_lun fc_lun;2286 struct fnic_stats *fnic_stats;2287 struct reset_stats *reset_stats;2288 int mqtag = rq->tag;2289 DECLARE_COMPLETION_ONSTACK(tm_done);2290 bool new_sc = 0;2291 uint16_t hwq = 0;2292 2293 /* Wait for rport to unblock */2294 fc_block_scsi_eh(sc);2295 2296 /* Get local-port, check ready and link up */2297 lp = shost_priv(sc->device->host);2298 2299 fnic = lport_priv(lp);2300 fnic_stats = &fnic->fnic_stats;2301 reset_stats = &fnic->fnic_stats.reset_stats;2302 2303 atomic64_inc(&reset_stats->device_resets);2304 2305 rport = starget_to_rport(scsi_target(sc->device));2306 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2307 "fcid: 0x%x lun: 0x%llx hwq: %d mqtag: 0x%x flags: 0x%x Device reset\n",2308 rport->port_id, sc->device->lun, hwq, mqtag,2309 fnic_priv(sc)->flags);2310 2311 if (lp->state != LPORT_ST_READY || !(lp->link_up))2312 goto fnic_device_reset_end;2313 2314 /* Check if remote port up */2315 if (fc_remote_port_chkready(rport)) {2316 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);2317 goto fnic_device_reset_end;2318 }2319 2320 fnic_priv(sc)->flags = FNIC_DEVICE_RESET;2321 2322 if (unlikely(mqtag < 0)) {2323 /*2324 * For device reset issued through sg3utils, we let2325 * only one LUN_RESET to go through and use a special2326 * tag equal to max_tag_id so that we don't have to allocate2327 * or free it. It won't interact with tags2328 * allocated by mid layer.2329 */2330 mutex_lock(&fnic->sgreset_mutex);2331 mqtag = fnic->fnic_max_tag_id;2332 new_sc = 1;2333 } else {2334 mqtag = blk_mq_unique_tag(rq);2335 hwq = blk_mq_unique_tag_to_hwq(mqtag);2336 }2337 2338 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2339 io_req = fnic_priv(sc)->io_req;2340 2341 /*2342 * If there is a io_req attached to this command, then use it,2343 * else allocate a new one.2344 */2345 if (!io_req) {2346 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);2347 if (!io_req) {2348 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2349 goto fnic_device_reset_end;2350 }2351 memset(io_req, 0, sizeof(*io_req));2352 io_req->port_id = rport->port_id;2353 io_req->tag = mqtag;2354 fnic_priv(sc)->io_req = io_req;2355 io_req->sc = sc;2356 2357 if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL)2358 WARN(1, "fnic<%d>: %s: tag 0x%x already exists\n",2359 fnic->fnic_num, __func__, blk_mq_unique_tag_to_tag(mqtag));2360 2361 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] =2362 io_req;2363 }2364 io_req->dr_done = &tm_done;2365 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING;2366 fnic_priv(sc)->lr_status = FCPIO_INVALID_CODE;2367 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2368 2369 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, "TAG %x\n", mqtag);2370 2371 /*2372 * issue the device reset, if enqueue failed, clean up the ioreq2373 * and break assoc with scsi cmd2374 */2375 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {2376 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2377 io_req = fnic_priv(sc)->io_req;2378 if (io_req)2379 io_req->dr_done = NULL;2380 goto fnic_device_reset_clean;2381 }2382 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2383 fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED;2384 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2385 2386 /*2387 * Wait on the local completion for LUN reset. The io_req may be2388 * freed while we wait since we hold no lock.2389 */2390 wait_for_completion_timeout(&tm_done,2391 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));2392 2393 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2394 io_req = fnic_priv(sc)->io_req;2395 if (!io_req) {2396 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2397 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2398 "io_req is null mqtag 0x%x sc 0x%p\n", mqtag, sc);2399 goto fnic_device_reset_end;2400 }2401 io_req->dr_done = NULL;2402 2403 status = fnic_priv(sc)->lr_status;2404 2405 /*2406 * If lun reset not completed, bail out with failed. io_req2407 * gets cleaned up during higher levels of EH2408 */2409 if (status == FCPIO_INVALID_CODE) {2410 atomic64_inc(&reset_stats->device_reset_timeouts);2411 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2412 "Device reset timed out\n");2413 fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT;2414 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2415 int_to_scsilun(sc->device->lun, &fc_lun);2416 /*2417 * Issue abort and terminate on device reset request.2418 * If q'ing of terminate fails, retry it after a delay.2419 */2420 while (1) {2421 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2422 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) {2423 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2424 break;2425 }2426 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2427 if (fnic_queue_abort_io_req(fnic,2428 mqtag | FNIC_TAG_DEV_RST,2429 FCPIO_ITMF_ABT_TASK_TERM,2430 fc_lun.scsi_lun, io_req, hwq)) {2431 wait_for_completion_timeout(&tm_done,2432 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));2433 } else {2434 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2435 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;2436 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING;2437 io_req->abts_done = &tm_done;2438 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2439 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2440 "Abort and terminate issued on Device reset mqtag 0x%x sc 0x%p\n",2441 mqtag, sc);2442 break;2443 }2444 }2445 while (1) {2446 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2447 if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) {2448 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2449 wait_for_completion_timeout(&tm_done,2450 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));2451 break;2452 } else {2453 io_req = fnic_priv(sc)->io_req;2454 io_req->abts_done = NULL;2455 goto fnic_device_reset_clean;2456 }2457 }2458 } else {2459 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2460 }2461 2462 /* Completed, but not successful, clean up the io_req, return fail */2463 if (status != FCPIO_SUCCESS) {2464 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2465 FNIC_SCSI_DBG(KERN_DEBUG,2466 fnic->lport->host, fnic->fnic_num,2467 "Device reset completed - failed\n");2468 io_req = fnic_priv(sc)->io_req;2469 goto fnic_device_reset_clean;2470 }2471 2472 /*2473 * Clean up any aborts on this lun that have still not2474 * completed. If any of these fail, then LUN reset fails.2475 * clean_pending_aborts cleans all cmds on this lun except2476 * the lun reset cmd. If all cmds get cleaned, the lun reset2477 * succeeds2478 */2479 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {2480 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2481 io_req = fnic_priv(sc)->io_req;2482 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2483 "Device reset failed"2484 " since could not abort all IOs\n");2485 goto fnic_device_reset_clean;2486 }2487 2488 /* Clean lun reset command */2489 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2490 io_req = fnic_priv(sc)->io_req;2491 if (io_req)2492 /* Completed, and successful */2493 ret = SUCCESS;2494 2495fnic_device_reset_clean:2496 if (io_req) {2497 fnic_priv(sc)->io_req = NULL;2498 io_req->sc = NULL;2499 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(io_req->tag)] = NULL;2500 }2501 2502 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2503 2504 if (io_req) {2505 start_time = io_req->start_time;2506 fnic_release_ioreq_buf(fnic, io_req, sc);2507 mempool_free(io_req, fnic->io_req_pool);2508 }2509 2510fnic_device_reset_end:2511 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc,2512 jiffies_to_msecs(jiffies - start_time),2513 0, ((u64)sc->cmnd[0] << 32 |2514 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |2515 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),2516 fnic_flags_and_state(sc));2517 2518 if (new_sc) {2519 fnic->sgreset_sc = NULL;2520 mutex_unlock(&fnic->sgreset_mutex);2521 }2522 2523 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2524 "Returning from device reset %s\n",2525 (ret == SUCCESS) ?2526 "SUCCESS" : "FAILED");2527 2528 if (ret == FAILED)2529 atomic64_inc(&reset_stats->device_reset_failures);2530 2531 return ret;2532}2533 2534/* Clean up all IOs, clean up libFC local port */2535int fnic_reset(struct Scsi_Host *shost)2536{2537 struct fc_lport *lp;2538 struct fnic *fnic;2539 int ret = 0;2540 struct reset_stats *reset_stats;2541 2542 lp = shost_priv(shost);2543 fnic = lport_priv(lp);2544 reset_stats = &fnic->fnic_stats.reset_stats;2545 2546 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,2547 "Issuing fnic reset\n");2548 2549 atomic64_inc(&reset_stats->fnic_resets);2550 2551 /*2552 * Reset local port, this will clean up libFC exchanges,2553 * reset remote port sessions, and if link is up, begin flogi2554 */2555 ret = fc_lport_reset(lp);2556 2557 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,2558 "Returning from fnic reset with: %s\n",2559 (ret == 0) ? "SUCCESS" : "FAILED");2560 2561 if (ret == 0)2562 atomic64_inc(&reset_stats->fnic_reset_completions);2563 else2564 atomic64_inc(&reset_stats->fnic_reset_failures);2565 2566 return ret;2567}2568 2569/*2570 * SCSI Error handling calls driver's eh_host_reset if all prior2571 * error handling levels return FAILED. If host reset completes2572 * successfully, and if link is up, then Fabric login begins.2573 *2574 * Host Reset is the highest level of error recovery. If this fails, then2575 * host is offlined by SCSI.2576 *2577 */2578int fnic_host_reset(struct scsi_cmnd *sc)2579{2580 int ret;2581 unsigned long wait_host_tmo;2582 struct Scsi_Host *shost = sc->device->host;2583 struct fc_lport *lp = shost_priv(shost);2584 struct fnic *fnic = lport_priv(lp);2585 unsigned long flags;2586 2587 spin_lock_irqsave(&fnic->fnic_lock, flags);2588 if (!fnic->internal_reset_inprogress) {2589 fnic->internal_reset_inprogress = true;2590 } else {2591 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2592 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2593 "host reset in progress skipping another host reset\n");2594 return SUCCESS;2595 }2596 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2597 2598 /*2599 * If fnic_reset is successful, wait for fabric login to complete2600 * scsi-ml tries to send a TUR to every device if host reset is2601 * successful, so before returning to scsi, fabric should be up2602 */2603 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;2604 if (ret == SUCCESS) {2605 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;2606 ret = FAILED;2607 while (time_before(jiffies, wait_host_tmo)) {2608 if ((lp->state == LPORT_ST_READY) &&2609 (lp->link_up)) {2610 ret = SUCCESS;2611 break;2612 }2613 ssleep(1);2614 }2615 }2616 2617 spin_lock_irqsave(&fnic->fnic_lock, flags);2618 fnic->internal_reset_inprogress = false;2619 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2620 return ret;2621}2622 2623/*2624 * This fxn is called from libFC when host is removed2625 */2626void fnic_scsi_abort_io(struct fc_lport *lp)2627{2628 int err = 0;2629 unsigned long flags;2630 enum fnic_state old_state;2631 struct fnic *fnic = lport_priv(lp);2632 DECLARE_COMPLETION_ONSTACK(remove_wait);2633 2634 /* Issue firmware reset for fnic, wait for reset to complete */2635retry_fw_reset:2636 spin_lock_irqsave(&fnic->fnic_lock, flags);2637 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) &&2638 fnic->link_events) {2639 /* fw reset is in progress, poll for its completion */2640 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2641 schedule_timeout(msecs_to_jiffies(100));2642 goto retry_fw_reset;2643 }2644 2645 fnic->remove_wait = &remove_wait;2646 old_state = fnic->state;2647 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;2648 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);2649 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2650 2651 err = fnic_fw_reset_handler(fnic);2652 if (err) {2653 spin_lock_irqsave(&fnic->fnic_lock, flags);2654 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)2655 fnic->state = old_state;2656 fnic->remove_wait = NULL;2657 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2658 return;2659 }2660 2661 /* Wait for firmware reset to complete */2662 wait_for_completion_timeout(&remove_wait,2663 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));2664 2665 spin_lock_irqsave(&fnic->fnic_lock, flags);2666 fnic->remove_wait = NULL;2667 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,2668 "fnic_scsi_abort_io %s\n",2669 (fnic->state == FNIC_IN_ETH_MODE) ?2670 "SUCCESS" : "FAILED");2671 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2672 2673}2674 2675/*2676 * This fxn called from libFC to clean up driver IO state on link down2677 */2678void fnic_scsi_cleanup(struct fc_lport *lp)2679{2680 unsigned long flags;2681 enum fnic_state old_state;2682 struct fnic *fnic = lport_priv(lp);2683 2684 /* issue fw reset */2685retry_fw_reset:2686 spin_lock_irqsave(&fnic->fnic_lock, flags);2687 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {2688 /* fw reset is in progress, poll for its completion */2689 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2690 schedule_timeout(msecs_to_jiffies(100));2691 goto retry_fw_reset;2692 }2693 old_state = fnic->state;2694 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;2695 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);2696 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2697 2698 if (fnic_fw_reset_handler(fnic)) {2699 spin_lock_irqsave(&fnic->fnic_lock, flags);2700 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)2701 fnic->state = old_state;2702 spin_unlock_irqrestore(&fnic->fnic_lock, flags);2703 }2704 2705}2706 2707void fnic_empty_scsi_cleanup(struct fc_lport *lp)2708{2709}2710 2711void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)2712{2713 struct fnic *fnic = lport_priv(lp);2714 2715 /* Non-zero sid, nothing to do */2716 if (sid)2717 goto call_fc_exch_mgr_reset;2718 2719 if (did) {2720 fnic_rport_exch_reset(fnic, did);2721 goto call_fc_exch_mgr_reset;2722 }2723 2724 /*2725 * sid = 0, did = 02726 * link down or device being removed2727 */2728 if (!fnic->in_remove)2729 fnic_scsi_cleanup(lp);2730 else2731 fnic_scsi_abort_io(lp);2732 2733 /* call libFC exch mgr reset to reset its exchanges */2734call_fc_exch_mgr_reset:2735 fc_exch_mgr_reset(lp, sid, did);2736 2737}2738 2739static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data)2740{2741 struct request *const rq = scsi_cmd_to_rq(sc);2742 struct fnic_pending_aborts_iter_data *iter_data = data;2743 struct fnic *fnic = iter_data->fnic;2744 int cmd_state;2745 struct fnic_io_req *io_req;2746 unsigned long flags;2747 uint16_t hwq = 0;2748 int tag;2749 2750 tag = blk_mq_unique_tag(rq);2751 hwq = blk_mq_unique_tag_to_hwq(tag);2752 2753 /*2754 * ignore this lun reset cmd or cmds that do not belong to2755 * this lun2756 */2757 if (iter_data->lr_sc && sc == iter_data->lr_sc)2758 return true;2759 if (iter_data->lun_dev && sc->device != iter_data->lun_dev)2760 return true;2761 2762 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags);2763 2764 io_req = fnic_priv(sc)->io_req;2765 if (!io_req) {2766 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2767 return true;2768 }2769 2770 /*2771 * Found IO that is still pending with firmware and2772 * belongs to the LUN that we are resetting2773 */2774 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,2775 "hwq: %d tag: 0x%x Found IO in state: %s on lun\n",2776 hwq, tag,2777 fnic_ioreq_state_to_str(fnic_priv(sc)->state));2778 cmd_state = fnic_priv(sc)->state;2779 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags);2780 if (cmd_state == FNIC_IOREQ_ABTS_PENDING)2781 iter_data->ret = 1;2782 2783 return iter_data->ret ? false : true;2784}2785 2786/*2787 * fnic_is_abts_pending() is a helper function that2788 * walks through tag map to check if there is any IOs pending,if there is one,2789 * then it returns 1 (true), otherwise 0 (false)2790 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,2791 * otherwise, it checks for all IOs.2792 */2793int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)2794{2795 struct fnic_pending_aborts_iter_data iter_data = {2796 .fnic = fnic,2797 .lun_dev = NULL,2798 .ret = 0,2799 };2800 2801 if (lr_sc) {2802 iter_data.lun_dev = lr_sc->device;2803 iter_data.lr_sc = lr_sc;2804 }2805 2806 /* walk again to check, if IOs are still pending in fw */2807 scsi_host_busy_iter(fnic->lport->host,2808 fnic_abts_pending_iter, &iter_data);2809 2810 return iter_data.ret;2811}2812