| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Abhijeet Joglekar | 6621 | 48.34% | 2 | 4.00% |
| Hiral Patel | 5269 | 38.47% | 6 | 12.00% |
| Satish Kharat | 994 | 7.26% | 15 | 30.00% |
| Sesidhar Beddel | 215 | 1.57% | 2 | 4.00% |
| Joe Eykholt | 158 | 1.15% | 1 | 2.00% |
| Hiral Shah | 149 | 1.09% | 4 | 8.00% |
| Maurizio Lombardi | 85 | 0.62% | 2 | 4.00% |
| Christoph Hellwig | 53 | 0.39% | 3 | 6.00% |
| Anil Chintalapati (achintal) | 46 | 0.34% | 1 | 2.00% |
| Jens Axboe | 29 | 0.21% | 1 | 2.00% |
| Roel Kluin | 28 | 0.20% | 2 | 4.00% |
| Hannes Reinecke | 18 | 0.13% | 3 | 6.00% |
| Narsimhulu Musini | 12 | 0.09% | 1 | 2.00% |
| Jeff Garzik | 6 | 0.04% | 1 | 2.00% |
| Dan Carpenter | 4 | 0.03% | 1 | 2.00% |
| Tejun Heo | 3 | 0.02% | 1 | 2.00% |
| Jason Yan | 3 | 0.02% | 1 | 2.00% |
| Lucas De Marchi | 2 | 0.01% | 1 | 2.00% |
| Christof Schmitt | 2 | 0.01% | 1 | 2.00% |
| Nicolas Iooss | 1 | 0.01% | 1 | 2.00% |
| Total | 13698 | 50 |
/* * Copyright 2008 Cisco Systems, Inc. All rights reserved. * Copyright 2007 Nuova Systems, Inc. All rights reserved. * * This program is free software; you may redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/mempool.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/workqueue.h> #include <linux/pci.h> #include <linux/scatterlist.h> #include <linux/skbuff.h> #include <linux/spinlock.h> #include <linux/if_ether.h> #include <linux/if_vlan.h> #include <linux/delay.h> #include <linux/gfp.h> #include <scsi/scsi.h> #include <scsi/scsi_host.h> #include <scsi/scsi_device.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_tcq.h> #include <scsi/fc/fc_els.h> #include <scsi/fc/fc_fcoe.h> #include <scsi/libfc.h> #include <scsi/fc_frame.h> #include "fnic_io.h" #include "fnic.h" const char *fnic_state_str[] = { [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE", [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE", }; static const char *fnic_ioreq_state_str[] = { [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", }; static const char *fcpio_status_str[] = { [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", [FCPIO_FW_ERR] = "FCPIO_FW_ERR", [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", }; const char *fnic_state_to_str(unsigned int state) { if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) return "unknown"; return fnic_state_str[state]; } static const char *fnic_ioreq_state_to_str(unsigned int state) { if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || !fnic_ioreq_state_str[state]) return "unknown"; return fnic_ioreq_state_str[state]; } static const char *fnic_fcpio_status_to_str(unsigned int status) { if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) return "unknown"; return fcpio_status_str[status]; } static void fnic_cleanup_io(struct fnic *fnic, int exclude_id); static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic, struct scsi_cmnd *sc) { u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1); return &fnic->io_req_lock[hash]; } static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic, int tag) { return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)]; } /* * Unmap the data buffer and sense buffer for an io_req, * also unmap and free the device-private scatter/gather list. */ static void fnic_release_ioreq_buf(struct fnic *fnic, struct fnic_io_req *io_req, struct scsi_cmnd *sc) { if (io_req->sgl_list_pa) dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, DMA_TO_DEVICE); scsi_dma_unmap(sc); if (io_req->sgl_cnt) mempool_free(io_req->sgl_list_alloc, fnic->io_sgl_pool[io_req->sgl_type]); if (io_req->sense_buf_pa) dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa, SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); } /* Free up Copy Wq descriptors. Called with copy_wq lock held */ static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) { /* if no Ack received from firmware, then nothing to clean */ if (!fnic->fw_ack_recd[0]) return 1; /* * Update desc_available count based on number of freed descriptors * Account for wraparound */ if (wq->to_clean_index <= fnic->fw_ack_index[0]) wq->ring.desc_avail += (fnic->fw_ack_index[0] - wq->to_clean_index + 1); else wq->ring.desc_avail += (wq->ring.desc_count - wq->to_clean_index + fnic->fw_ack_index[0] + 1); /* * just bump clean index to ack_index+1 accounting for wraparound * this will essentially free up all descriptors between * to_clean_index and fw_ack_index, both inclusive */ wq->to_clean_index = (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; /* we have processed the acks received so far */ fnic->fw_ack_recd[0] = 0; return 0; } /** * __fnic_set_state_flags * Sets/Clears bits in fnic's state_flags **/ void __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, unsigned long clearbits) { unsigned long flags = 0; unsigned long host_lock_flags = 0; spin_lock_irqsave(&fnic->fnic_lock, flags); spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags); if (clearbits) fnic->state_flags &= ~st_flags; else fnic->state_flags |= st_flags; spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags); spin_unlock_irqrestore(&fnic->fnic_lock, flags); return; } /* * fnic_fw_reset_handler * Routine to send reset msg to fw */ int fnic_fw_reset_handler(struct fnic *fnic) { struct vnic_wq_copy *wq = &fnic->wq_copy[0]; int ret = 0; unsigned long flags; /* indicate fwreset to io path */ fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); skb_queue_purge(&fnic->frame_queue); skb_queue_purge(&fnic->tx_queue); /* wait for io cmpl */ while (atomic_read(&fnic->in_flight)) schedule_timeout(msecs_to_jiffies(1)); spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) free_wq_copy_descs(fnic, wq); if (!vnic_wq_copy_desc_avail(wq)) ret = -EAGAIN; else { fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, atomic64_read( &fnic->fnic_stats.fw_stats.active_fw_reqs)); } spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); if (!ret) { atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Issued fw reset\n"); } else { fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Failed to issue fw reset\n"); } return ret; } /* * fnic_flogi_reg_handler * Routine to send flogi register msg to fw */ int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) { struct vnic_wq_copy *wq = &fnic->wq_copy[0]; enum fcpio_flogi_reg_format_type format; struct fc_lport *lp = fnic->lport; u8 gw_mac[ETH_ALEN]; int ret = 0; unsigned long flags; spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) free_wq_copy_descs(fnic, wq); if (!vnic_wq_copy_desc_avail(wq)) { ret = -EAGAIN; goto flogi_reg_ioreq_end; } if (fnic->ctlr.map_dest) { memset(gw_mac, 0xff, ETH_ALEN); format = FCPIO_FLOGI_REG_DEF_DEST; } else { memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); format = FCPIO_FLOGI_REG_GW_DEST; } if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, fc_id, gw_mac, fnic->data_src_addr, lp->r_a_tov, lp->e_d_tov); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", fc_id, fnic->data_src_addr, gw_mac); } else { fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, format, fc_id, gw_mac); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "FLOGI reg issued fcid %x map %d dest %pM\n", fc_id, fnic->ctlr.map_dest, gw_mac); } atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); flogi_reg_ioreq_end: spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); return ret; } /* * fnic_queue_wq_copy_desc * Routine to enqueue a wq copy desc */ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, struct vnic_wq_copy *wq, struct fnic_io_req *io_req, struct scsi_cmnd *sc, int sg_count) { struct scatterlist *sg; struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); struct fc_rport_libfc_priv *rp = rport->dd_data; struct host_sg_desc *desc; struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; unsigned int i; unsigned long intr_flags; int flags; u8 exch_flags; struct scsi_lun fc_lun; if (sg_count) { /* For each SGE, create a device desc entry */ desc = io_req->sgl_list; for_each_sg(scsi_sglist(sc), sg, sg_count, i) { desc->addr = cpu_to_le64(sg_dma_address(sg)); desc->len = cpu_to_le32(sg_dma_len(sg)); desc->_resvd = 0; desc++; } io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev, io_req->sgl_list, sizeof(io_req->sgl_list[0]) * sg_count, DMA_TO_DEVICE); if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) { printk(KERN_ERR "DMA mapping failed\n"); return SCSI_MLQUEUE_HOST_BUSY; } } io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev, sc->sense_buffer, SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) { dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, sizeof(io_req->sgl_list[0]) * sg_count, DMA_TO_DEVICE); printk(KERN_ERR "DMA mapping failed\n"); return SCSI_MLQUEUE_HOST_BUSY; } int_to_scsilun(sc->device->lun, &fc_lun); /* Enqueue the descriptor in the Copy WQ */ spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) free_wq_copy_descs(fnic, wq); if (unlikely(!vnic_wq_copy_desc_avail(wq))) { spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "fnic_queue_wq_copy_desc failure - no descriptors\n"); atomic64_inc(&misc_stats->io_cpwq_alloc_failures); return SCSI_MLQUEUE_HOST_BUSY; } flags = 0; if (sc->sc_data_direction == DMA_FROM_DEVICE) flags = FCPIO_ICMND_RDDATA; else if (sc->sc_data_direction == DMA_TO_DEVICE) flags = FCPIO_ICMND_WRDATA; exch_flags = 0; if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && (rp->flags & FC_RP_FLAGS_RETRY)) exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 0, exch_flags, io_req->sgl_cnt, SCSI_SENSE_BUFFERSIZE, io_req->sgl_list_pa, io_req->sense_buf_pa, 0, /* scsi cmd ref, always 0 */ FCPIO_ICMND_PTA_SIMPLE, /* scsi pri and tag */ flags, /* command flags */ sc->cmnd, sc->cmd_len, scsi_bufflen(sc), fc_lun.scsi_lun, io_req->port_id, rport->maxframe_size, rp->r_a_tov, rp->e_d_tov); atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); return 0; } /* * fnic_queuecommand * Routine to send a scsi cdb * Called with host_lock held and interrupts disabled. */ static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) { struct fc_lport *lp = shost_priv(sc->device->host); struct fc_rport *rport; struct fnic_io_req *io_req = NULL; struct fnic *fnic = lport_priv(lp); struct fnic_stats *fnic_stats = &fnic->fnic_stats; struct vnic_wq_copy *wq; int ret; u64 cmd_trace; int sg_count = 0; unsigned long flags = 0; unsigned long ptr; spinlock_t *io_lock = NULL; int io_lock_acquired = 0; struct fc_rport_libfc_priv *rp; if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) return SCSI_MLQUEUE_HOST_BUSY; if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) return SCSI_MLQUEUE_HOST_BUSY; rport = starget_to_rport(scsi_target(sc->device)); if (!rport) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "returning DID_NO_CONNECT for IO as rport is NULL\n"); sc->result = DID_NO_CONNECT << 16; done(sc); return 0; } ret = fc_remote_port_chkready(rport); if (ret) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "rport is not ready\n"); atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); sc->result = ret; done(sc); return 0; } rp = rport->dd_data; if (!rp || rp->rp_state == RPORT_ST_DELETE) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "rport 0x%x removed, returning DID_NO_CONNECT\n", rport->port_id); atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); sc->result = DID_NO_CONNECT<<16; done(sc); return 0; } if (rp->rp_state != RPORT_ST_READY) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", rport->port_id, rp->rp_state); sc->result = DID_IMM_RETRY << 16; done(sc); return 0; } if (lp->state != LPORT_ST_READY || !(lp->link_up)) return SCSI_MLQUEUE_HOST_BUSY; atomic_inc(&fnic->in_flight); /* * Release host lock, use driver resource specific locks from here. * Don't re-enable interrupts in case they were disabled prior to the * caller disabling them. */ spin_unlock(lp->host->host_lock); CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; CMD_FLAGS(sc) = FNIC_NO_FLAGS; /* Get a new io_req for this SCSI IO */ io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); if (!io_req) { atomic64_inc(&fnic_stats->io_stats.alloc_failures); ret = SCSI_MLQUEUE_HOST_BUSY; goto out; } memset(io_req, 0, sizeof(*io_req)); /* Map the data buffer */ sg_count = scsi_dma_map(sc); if (sg_count < 0) { FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, sc->request->tag, sc, 0, sc->cmnd[0], sg_count, CMD_STATE(sc)); mempool_free(io_req, fnic->io_req_pool); goto out; } /* Determine the type of scatter/gather list we need */ io_req->sgl_cnt = sg_count; io_req->sgl_type = FNIC_SGL_CACHE_DFLT; if (sg_count > FNIC_DFLT_SG_DESC_CNT) io_req->sgl_type = FNIC_SGL_CACHE_MAX; if (sg_count) { io_req->sgl_list = mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], GFP_ATOMIC); if (!io_req->sgl_list) { atomic64_inc(&fnic_stats->io_stats.alloc_failures); ret = SCSI_MLQUEUE_HOST_BUSY; scsi_dma_unmap(sc); mempool_free(io_req, fnic->io_req_pool); goto out; } /* Cache sgl list allocated address before alignment */ io_req->sgl_list_alloc = io_req->sgl_list; ptr = (unsigned long) io_req->sgl_list; if (ptr % FNIC_SG_DESC_ALIGN) { io_req->sgl_list = (struct host_sg_desc *) (((unsigned long) ptr + FNIC_SG_DESC_ALIGN - 1) & ~(FNIC_SG_DESC_ALIGN - 1)); } } /* * Will acquire lock defore setting to IO initialized. */ io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); /* initialize rest of io_req */ io_lock_acquired = 1; io_req->port_id = rport->port_id; io_req->start_time = jiffies; CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; CMD_SP(sc) = (char *)io_req; CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; sc->scsi_done = done; /* create copy wq desc and enqueue it */ wq = &fnic->wq_copy[0]; ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); if (ret) { /* * In case another thread cancelled the request, * refetch the pointer under the lock. */ FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, sc->request->tag, sc, 0, 0, 0, (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); io_req = (struct fnic_io_req *)CMD_SP(sc); CMD_SP(sc) = NULL; CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; spin_unlock_irqrestore(io_lock, flags); if (io_req) { fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); } atomic_dec(&fnic->in_flight); /* acquire host lock before returning to SCSI */ spin_lock(lp->host->host_lock); return ret; } else { atomic64_inc(&fnic_stats->io_stats.active_ios); atomic64_inc(&fnic_stats->io_stats.num_ios); if (atomic64_read(&fnic_stats->io_stats.active_ios) > atomic64_read(&fnic_stats->io_stats.max_active_ios)) atomic64_set(&fnic_stats->io_stats.max_active_ios, atomic64_read(&fnic_stats->io_stats.active_ios)); /* REVISIT: Use per IO lock in the final code */ CMD_FLAGS(sc) |= FNIC_IO_ISSUED; } out: cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]); FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, sc->request->tag, sc, io_req, sg_count, cmd_trace, (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); /* if only we issued IO, will we have the io lock */ if (io_lock_acquired) spin_unlock_irqrestore(io_lock, flags); atomic_dec(&fnic->in_flight); /* acquire host lock before returning to SCSI */ spin_lock(lp->host->host_lock); return ret; } DEF_SCSI_QCMD(fnic_queuecommand) /* * fnic_fcpio_fw_reset_cmpl_handler * Routine to handle fw reset completion */ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, struct fcpio_fw_req *desc) { u8 type; u8 hdr_status; struct fcpio_tag tag; int ret = 0; unsigned long flags; struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); atomic64_inc(&reset_stats->fw_reset_completions); /* Clean up all outstanding io requests */ fnic_cleanup_io(fnic, SCSI_NO_TAG); atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); atomic64_set(&fnic->io_cmpl_skip, 0); spin_lock_irqsave(&fnic->fnic_lock, flags); /* fnic should be in FC_TRANS_ETH_MODE */ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { /* Check status of reset completion */ if (!hdr_status) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "reset cmpl success\n"); /* Ready to send flogi out */ fnic->state = FNIC_IN_ETH_MODE; } else { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic fw_reset : failed %s\n", fnic_fcpio_status_to_str(hdr_status)); /* * Unable to change to eth mode, cannot send out flogi * Change state to fc mode, so that subsequent Flogi * requests from libFC will cause more attempts to * reset the firmware. Free the cached flogi */ fnic->state = FNIC_IN_FC_MODE; atomic64_inc(&reset_stats->fw_reset_failures); ret = -1; } } else { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Unexpected state %s while processing" " reset cmpl\n", fnic_state_to_str(fnic->state)); atomic64_inc(&reset_stats->fw_reset_failures); ret = -1; } /* Thread removing device blocks till firmware reset is complete */ if (fnic->remove_wait) complete(fnic->remove_wait); /* * If fnic is being removed, or fw reset failed * free the flogi frame. Else, send it out */ if (fnic->remove_wait || ret) { spin_unlock_irqrestore(&fnic->fnic_lock, flags); skb_queue_purge(&fnic->tx_queue); goto reset_cmpl_handler_end; } spin_unlock_irqrestore(&fnic->fnic_lock, flags); fnic_flush_tx(fnic); reset_cmpl_handler_end: fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); return ret; } /* * fnic_fcpio_flogi_reg_cmpl_handler * Routine to handle flogi register completion */ static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, struct fcpio_fw_req *desc) { u8 type; u8 hdr_status; struct fcpio_tag tag; int ret = 0; unsigned long flags; fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); /* Update fnic state based on status of flogi reg completion */ spin_lock_irqsave(&fnic->fnic_lock, flags); if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { /* Check flogi registration completion status */ if (!hdr_status) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "flog reg succeeded\n"); fnic->state = FNIC_IN_FC_MODE; } else { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic flogi reg :failed %s\n", fnic_fcpio_status_to_str(hdr_status)); fnic->state = FNIC_IN_ETH_MODE; ret = -1; } } else { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Unexpected fnic state %s while" " processing flogi reg completion\n", fnic_state_to_str(fnic->state)); ret = -1; } if (!ret) { if (fnic->stop_rx_link_events) { spin_unlock_irqrestore(&fnic->fnic_lock, flags); goto reg_cmpl_handler_end; } spin_unlock_irqrestore(&fnic->fnic_lock, flags); fnic_flush_tx(fnic); queue_work(fnic_event_queue, &fnic->frame_work); } else { spin_unlock_irqrestore(&fnic->fnic_lock, flags); } reg_cmpl_handler_end: return ret; } static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, u16 request_out) { if (wq->to_clean_index <= wq->to_use_index) { /* out of range, stale request_out index */ if (request_out < wq->to_clean_index || request_out >= wq->to_use_index) return 0; } else { /* out of range, stale request_out index */ if (request_out < wq->to_clean_index && request_out >= wq->to_use_index) return 0; } /* request_out index is in range */ return 1; } /* * Mark that ack received and store the Ack index. If there are multiple * acks received before Tx thread cleans it up, the latest value will be * used which is correct behavior. This state should be in the copy Wq * instead of in the fnic */ static inline void fnic_fcpio_ack_handler(struct fnic *fnic, unsigned int cq_index, struct fcpio_fw_req *desc) { struct vnic_wq_copy *wq; u16 request_out = desc->u.ack.request_out; unsigned long flags; u64 *ox_id_tag = (u64 *)(void *)desc; /* mark the ack state */ wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); fnic->fnic_stats.misc_stats.last_ack_time = jiffies; if (is_ack_index_in_range(wq, request_out)) { fnic->fw_ack_index[0] = request_out; fnic->fw_ack_recd[0] = 1; } else atomic64_inc( &fnic->fnic_stats.misc_stats.ack_index_out_of_range); spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); FNIC_TRACE(fnic_fcpio_ack_handler, fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], ox_id_tag[4], ox_id_tag[5]); } /* * fnic_fcpio_icmnd_cmpl_handler * Routine to handle icmnd completions */ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, struct fcpio_fw_req *desc) { u8 type; u8 hdr_status; struct fcpio_tag tag; u32 id; u64 xfer_len = 0; struct fcpio_icmnd_cmpl *icmnd_cmpl; struct fnic_io_req *io_req; struct scsi_cmnd *sc; struct fnic_stats *fnic_stats = &fnic->fnic_stats; unsigned long flags; spinlock_t *io_lock; u64 cmd_trace; unsigned long start_time; unsigned long io_duration_time; /* Decode the cmpl description to get the io_req id */ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); fcpio_tag_id_dec(&tag, &id); icmnd_cmpl = &desc->u.icmnd_cmpl; if (id >= fnic->fnic_max_tag_id) { shost_printk(KERN_ERR, fnic->lport->host, "Tag out of range tag %x hdr status = %s\n", id, fnic_fcpio_status_to_str(hdr_status)); return; } sc = scsi_host_find_tag(fnic->lport->host, id); WARN_ON_ONCE(!sc); if (!sc) { atomic64_inc(&fnic_stats->io_stats.sc_null); shost_printk(KERN_ERR, fnic->lport->host, "icmnd_cmpl sc is null - " "hdr status = %s tag = 0x%x desc = 0x%p\n", fnic_fcpio_status_to_str(hdr_status), id, desc); FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, fnic->lport->host->host_no, id, ((u64)icmnd_cmpl->_resvd0[1] << 16 | (u64)icmnd_cmpl->_resvd0[0]), ((u64)hdr_status << 16 | (u64)icmnd_cmpl->scsi_status << 8 | (u64)icmnd_cmpl->flags), desc, (u64)icmnd_cmpl->residual, 0); return; } io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); WARN_ON_ONCE(!io_req); if (!io_req) { atomic64_inc(&fnic_stats->io_stats.ioreq_null); CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; spin_unlock_irqrestore(io_lock, flags); shost_printk(KERN_ERR, fnic->lport->host, "icmnd_cmpl io_req is null - " "hdr status = %s tag = 0x%x sc 0x%p\n", fnic_fcpio_status_to_str(hdr_status), id, sc); return; } start_time = io_req->start_time; /* firmware completed the io */ io_req->io_completed = 1; /* * if SCSI-ML has already issued abort on this command, * set completion of the IO. The abts path will clean it up */ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { /* * set the FNIC_IO_DONE so that this doesn't get * flagged as 'out of order' if it was not aborted */ CMD_FLAGS(sc) |= FNIC_IO_DONE; CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; spin_unlock_irqrestore(io_lock, flags); if(FCPIO_ABORTED == hdr_status) CMD_FLAGS(sc) |= FNIC_IO_ABORTED; FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "icmnd_cmpl abts pending " "hdr status = %s tag = 0x%x sc = 0x%p " "scsi_status = %x residual = %d\n", fnic_fcpio_status_to_str(hdr_status), id, sc, icmnd_cmpl->scsi_status, icmnd_cmpl->residual); return; } /* Mark the IO as complete */ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; icmnd_cmpl = &desc->u.icmnd_cmpl; switch (hdr_status) { case FCPIO_SUCCESS: sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; xfer_len = scsi_bufflen(sc); scsi_set_resid(sc, icmnd_cmpl->residual); if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) xfer_len -= icmnd_cmpl->residual; if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) atomic64_inc(&fnic_stats->misc_stats.check_condition); if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) atomic64_inc(&fnic_stats->misc_stats.queue_fulls); break; case FCPIO_TIMEOUT: /* request was timed out */ atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_ABORTED: /* request was aborted */ atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); scsi_set_resid(sc, icmnd_cmpl->residual); sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ atomic64_inc(&fnic_stats->io_stats.io_not_found); sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_FW_ERR: /* request was terminated due fw error */ atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ atomic64_inc(&fnic_stats->misc_stats.mss_invalid); sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; case FCPIO_INVALID_HEADER: /* header contains invalid data */ case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ default: sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; break; } /* Break link with the SCSI command */ CMD_SP(sc) = NULL; CMD_FLAGS(sc) |= FNIC_IO_DONE; spin_unlock_irqrestore(io_lock, flags); if (hdr_status != FCPIO_SUCCESS) { atomic64_inc(&fnic_stats->io_stats.io_failures); shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", fnic_fcpio_status_to_str(hdr_status)); } fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); cmd_trace = ((u64)hdr_status << 56) | (u64)icmnd_cmpl->scsi_status << 48 | (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, sc->device->host->host_no, id, sc, ((u64)icmnd_cmpl->_resvd0[1] << 56 | (u64)icmnd_cmpl->_resvd0[0] << 48 | jiffies_to_msecs(jiffies - start_time)), desc, cmd_trace, (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); if (sc->sc_data_direction == DMA_FROM_DEVICE) { fnic->lport->host_stats.fcp_input_requests++; fnic->fcp_input_bytes += xfer_len; } else if (sc->sc_data_direction == DMA_TO_DEVICE) { fnic->lport->host_stats.fcp_output_requests++; fnic->fcp_output_bytes += xfer_len; } else fnic->lport->host_stats.fcp_control_requests++; atomic64_dec(&fnic_stats->io_stats.active_ios); if (atomic64_read(&fnic->io_cmpl_skip)) atomic64_dec(&fnic->io_cmpl_skip); else atomic64_inc(&fnic_stats->io_stats.io_completions); io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time); if(io_duration_time <= 10) atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); else if(io_duration_time <= 100) atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); else if(io_duration_time <= 500) atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); else if(io_duration_time <= 5000) atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); else if(io_duration_time <= 10000) atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); else if(io_duration_time <= 30000) atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); else { atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); } /* Call SCSI completion function to complete the IO */ if (sc->scsi_done) sc->scsi_done(sc); } /* fnic_fcpio_itmf_cmpl_handler * Routine to handle itmf completions */ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, struct fcpio_fw_req *desc) { u8 type; u8 hdr_status; struct fcpio_tag tag; u32 id; struct scsi_cmnd *sc; struct fnic_io_req *io_req; struct fnic_stats *fnic_stats = &fnic->fnic_stats; struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; unsigned long flags; spinlock_t *io_lock; unsigned long start_time; fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); fcpio_tag_id_dec(&tag, &id); if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { shost_printk(KERN_ERR, fnic->lport->host, "Tag out of range tag %x hdr status = %s\n", id, fnic_fcpio_status_to_str(hdr_status)); return; } sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); WARN_ON_ONCE(!sc); if (!sc) { atomic64_inc(&fnic_stats->io_stats.sc_null); shost_printk(KERN_ERR, fnic->lport->host, "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", fnic_fcpio_status_to_str(hdr_status), id); return; } io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); WARN_ON_ONCE(!io_req); if (!io_req) { atomic64_inc(&fnic_stats->io_stats.ioreq_null); spin_unlock_irqrestore(io_lock, flags); CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; shost_printk(KERN_ERR, fnic->lport->host, "itmf_cmpl io_req is null - " "hdr status = %s tag = 0x%x sc 0x%p\n", fnic_fcpio_status_to_str(hdr_status), id, sc); return; } start_time = io_req->start_time; if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { /* Abort and terminate completion of device reset req */ /* REVISIT : Add asserts about various flags */ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "dev reset abts cmpl recd. id %x status %s\n", id, fnic_fcpio_status_to_str(hdr_status)); CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; CMD_ABTS_STATUS(sc) = hdr_status; CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; if (io_req->abts_done) complete(io_req->abts_done); spin_unlock_irqrestore(io_lock, flags); } else if (id & FNIC_TAG_ABORT) { /* Completion of abort cmd */ switch (hdr_status) { case FCPIO_SUCCESS: break; case FCPIO_TIMEOUT: if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) atomic64_inc(&abts_stats->abort_fw_timeouts); else atomic64_inc( &term_stats->terminate_fw_timeouts); break; case FCPIO_ITMF_REJECTED: FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "abort reject recd. id %d\n", (int)(id & FNIC_TAG_MASK)); break; case FCPIO_IO_NOT_FOUND: if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) atomic64_inc(&abts_stats->abort_io_not_found); else atomic64_inc( &term_stats->terminate_io_not_found); break; default: if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) atomic64_inc(&abts_stats->abort_failures); else atomic64_inc( &term_stats->terminate_failures); break; } if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { /* This is a late completion. Ignore it */ spin_unlock_irqrestore(io_lock, flags); return; } CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; CMD_ABTS_STATUS(sc) = hdr_status; /* If the status is IO not found consider it as success */ if (hdr_status == FCPIO_IO_NOT_FOUND) CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "abts cmpl recd. id %d status %s\n", (int)(id & FNIC_TAG_MASK), fnic_fcpio_status_to_str(hdr_status)); /* * If scsi_eh thread is blocked waiting for abts to complete, * signal completion to it. IO will be cleaned in the thread * else clean it in this context */ if (io_req->abts_done) { complete(io_req->abts_done); spin_unlock_irqrestore(io_lock, flags); } else { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "abts cmpl, completing IO\n"); CMD_SP(sc) = NULL; sc->result = (DID_ERROR << 16); spin_unlock_irqrestore(io_lock, flags); fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); if (sc->scsi_done) { FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, sc->device->host->host_no, id, sc, jiffies_to_msecs(jiffies - start_time), desc, (((u64)hdr_status << 40) | (u64)sc->cmnd[0] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); sc->scsi_done(sc); atomic64_dec(&fnic_stats->io_stats.active_ios); if (atomic64_read(&fnic->io_cmpl_skip)) atomic64_dec(&fnic->io_cmpl_skip); else atomic64_inc(&fnic_stats->io_stats.io_completions); } } } else if (id & FNIC_TAG_DEV_RST) { /* Completion of device reset */ CMD_LR_STATUS(sc) = hdr_status; if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { spin_unlock_irqrestore(io_lock, flags); CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, sc->device->host->host_no, id, sc, jiffies_to_msecs(jiffies - start_time), desc, 0, (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Terminate pending " "dev reset cmpl recd. id %d status %s\n", (int)(id & FNIC_TAG_MASK), fnic_fcpio_status_to_str(hdr_status)); return; } if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { /* Need to wait for terminate completion */ spin_unlock_irqrestore(io_lock, flags); FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, sc->device->host->host_no, id, sc, jiffies_to_msecs(jiffies - start_time), desc, 0, (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "dev reset cmpl recd after time out. " "id %d status %s\n", (int)(id & FNIC_TAG_MASK), fnic_fcpio_status_to_str(hdr_status)); return; } CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "dev reset cmpl recd. id %d status %s\n", (int)(id & FNIC_TAG_MASK), fnic_fcpio_status_to_str(hdr_status)); if (io_req->dr_done) complete(io_req->dr_done); spin_unlock_irqrestore(io_lock, flags); } else { shost_printk(KERN_ERR, fnic->lport->host, "Unexpected itmf io state %s tag %x\n", fnic_ioreq_state_to_str(CMD_STATE(sc)), id); spin_unlock_irqrestore(io_lock, flags); } } /* * fnic_fcpio_cmpl_handler * Routine to service the cq for wq_copy */ static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, unsigned int cq_index, struct fcpio_fw_req *desc) { struct fnic *fnic = vnic_dev_priv(vdev); switch (desc->hdr.type) { case FCPIO_ICMND_CMPL: /* fw completed a command */ case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ case FCPIO_RESET_CMPL: /* fw completed reset */ atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); break; default: break; } switch (desc->hdr.type) { case FCPIO_ACK: /* fw copied copy wq desc to its queue */ fnic_fcpio_ack_handler(fnic, cq_index, desc); break; case FCPIO_ICMND_CMPL: /* fw completed a command */ fnic_fcpio_icmnd_cmpl_handler(fnic, desc); break; case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ fnic_fcpio_itmf_cmpl_handler(fnic, desc); break; case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); break; case FCPIO_RESET_CMPL: /* fw completed reset */ fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); break; default: FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "firmware completion type %d\n", desc->hdr.type); break; } return 0; } /* * fnic_wq_copy_cmpl_handler * Routine to process wq copy */ int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) { unsigned int wq_work_done = 0; unsigned int i, cq_index; unsigned int cur_work_done; struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; u64 start_jiffies = 0; u64 end_jiffies = 0; u64 delta_jiffies = 0; u64 delta_ms = 0; for (i = 0; i < fnic->wq_copy_count; i++) { cq_index = i + fnic->raw_wq_count + fnic->rq_count; start_jiffies = jiffies; cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], fnic_fcpio_cmpl_handler, copy_work_to_do); end_jiffies = jiffies; wq_work_done += cur_work_done; delta_jiffies = end_jiffies - start_jiffies; if (delta_jiffies > (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { atomic64_set(&misc_stats->max_isr_jiffies, delta_jiffies); delta_ms = jiffies_to_msecs(delta_jiffies); atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); atomic64_set(&misc_stats->corr_work_done, cur_work_done); } } return wq_work_done; } static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) { int i; struct fnic_io_req *io_req; unsigned long flags = 0; struct scsi_cmnd *sc; spinlock_t *io_lock; unsigned long start_time = 0; struct fnic_stats *fnic_stats = &fnic->fnic_stats; for (i = 0; i < fnic->fnic_max_tag_id; i++) { if (i == exclude_id) continue; io_lock = fnic_io_lock_tag(fnic, i); spin_lock_irqsave(io_lock, flags); sc = scsi_host_find_tag(fnic->lport->host, i); if (!sc) { spin_unlock_irqrestore(io_lock, flags); continue; } io_req = (struct fnic_io_req *)CMD_SP(sc); if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { /* * We will be here only when FW completes reset * without sending completions for outstanding ios. */ CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; if (io_req && io_req->dr_done) complete(io_req->dr_done); else if (io_req && io_req->abts_done) complete(io_req->abts_done); spin_unlock_irqrestore(io_lock, flags); continue; } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { spin_unlock_irqrestore(io_lock, flags); continue; } if (!io_req) { spin_unlock_irqrestore(io_lock, flags); goto cleanup_scsi_cmd; } CMD_SP(sc) = NULL; spin_unlock_irqrestore(io_lock, flags); /* * If there is a scsi_cmnd associated with this io_req, then * free the corresponding state */ start_time = io_req->start_time; fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); cleanup_scsi_cmd: sc->result = DID_TRANSPORT_DISRUPTED << 16; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", __func__, sc->request->tag, sc, (jiffies - start_time)); if (atomic64_read(&fnic->io_cmpl_skip)) atomic64_dec(&fnic->io_cmpl_skip); else atomic64_inc(&fnic_stats->io_stats.io_completions); /* Complete the command to SCSI */ if (sc->scsi_done) { if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) shost_printk(KERN_ERR, fnic->lport->host, "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", sc->request->tag, sc); FNIC_TRACE(fnic_cleanup_io, sc->device->host->host_no, i, sc, jiffies_to_msecs(jiffies - start_time), 0, ((u64)sc->cmnd[0] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); sc->scsi_done(sc); } } } void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, struct fcpio_host_req *desc) { u32 id; struct fnic *fnic = vnic_dev_priv(wq->vdev); struct fnic_io_req *io_req; struct scsi_cmnd *sc; unsigned long flags; spinlock_t *io_lock; unsigned long start_time = 0; /* get the tag reference */ fcpio_tag_id_dec(&desc->hdr.tag, &id); id &= FNIC_TAG_MASK; if (id >= fnic->fnic_max_tag_id) return; sc = scsi_host_find_tag(fnic->lport->host, id); if (!sc) return; io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); /* Get the IO context which this desc refers to */ io_req = (struct fnic_io_req *)CMD_SP(sc); /* fnic interrupts are turned off by now */ if (!io_req) { spin_unlock_irqrestore(io_lock, flags); goto wq_copy_cleanup_scsi_cmd; } CMD_SP(sc) = NULL; spin_unlock_irqrestore(io_lock, flags); start_time = io_req->start_time; fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); wq_copy_cleanup_scsi_cmd: sc->result = DID_NO_CONNECT << 16; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" " DID_NO_CONNECT\n"); if (sc->scsi_done) { FNIC_TRACE(fnic_wq_copy_cleanup_handler, sc->device->host->host_no, id, sc, jiffies_to_msecs(jiffies - start_time), 0, ((u64)sc->cmnd[0] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); sc->scsi_done(sc); } } static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, u32 task_req, u8 *fc_lun, struct fnic_io_req *io_req) { struct vnic_wq_copy *wq = &fnic->wq_copy[0]; struct Scsi_Host *host = fnic->lport->host; struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; unsigned long flags; spin_lock_irqsave(host->host_lock, flags); if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { spin_unlock_irqrestore(host->host_lock, flags); return 1; } else atomic_inc(&fnic->in_flight); spin_unlock_irqrestore(host->host_lock, flags); spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) free_wq_copy_descs(fnic, wq); if (!vnic_wq_copy_desc_avail(wq)) { spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); atomic_dec(&fnic->in_flight); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_queue_abort_io_req: failure: no descriptors\n"); atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); return 1; } fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 0, task_req, tag, fc_lun, io_req->port_id, fnic->config.ra_tov, fnic->config.ed_tov); atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); atomic_dec(&fnic->in_flight); return 0; } static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) { int tag; int abt_tag; int term_cnt = 0; struct fnic_io_req *io_req; spinlock_t *io_lock; unsigned long flags; struct scsi_cmnd *sc; struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; struct scsi_lun fc_lun; enum fnic_ioreq_state old_ioreq_state; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_rport_exch_reset called portid 0x%06x\n", port_id); if (fnic->in_remove) return; for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { abt_tag = tag; io_lock = fnic_io_lock_tag(fnic, tag); spin_lock_irqsave(io_lock, flags); sc = scsi_host_find_tag(fnic->lport->host, tag); if (!sc) { spin_unlock_irqrestore(io_lock, flags); continue; } io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req || io_req->port_id != port_id) { spin_unlock_irqrestore(io_lock, flags); continue; } if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", sc); spin_unlock_irqrestore(io_lock, flags); continue; } /* * Found IO that is still pending with firmware and * belongs to rport that went away */ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { spin_unlock_irqrestore(io_lock, flags); continue; } if (io_req->abts_done) { shost_printk(KERN_ERR, fnic->lport->host, "fnic_rport_exch_reset: io_req->abts_done is set " "state is %s\n", fnic_ioreq_state_to_str(CMD_STATE(sc))); } if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { shost_printk(KERN_ERR, fnic->lport->host, "rport_exch_reset " "IO not yet issued %p tag 0x%x flags " "%x state %d\n", sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); } old_ioreq_state = CMD_STATE(sc); CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { atomic64_inc(&reset_stats->device_reset_terminates); abt_tag = (tag | FNIC_TAG_DEV_RST); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); } BUG_ON(io_req->abts_done); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_rport_reset_exch: Issuing abts\n"); spin_unlock_irqrestore(io_lock, flags); /* Now queue the abort command to firmware */ int_to_scsilun(sc->device->lun, &fc_lun); if (fnic_queue_abort_io_req(fnic, abt_tag, FCPIO_ITMF_ABT_TASK_TERM, fc_lun.scsi_lun, io_req)) { /* * Revert the cmd state back to old state, if * it hasn't changed in between. This cmd will get * aborted later by scsi_eh, or cleaned up during * lun reset */ spin_lock_irqsave(io_lock, flags); if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) CMD_STATE(sc) = old_ioreq_state; spin_unlock_irqrestore(io_lock, flags); } else { spin_lock_irqsave(io_lock, flags); if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; else CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; spin_unlock_irqrestore(io_lock, flags); atomic64_inc(&term_stats->terminates); term_cnt++; } } if (term_cnt > atomic64_read(&term_stats->max_terminates)) atomic64_set(&term_stats->max_terminates, term_cnt); } void fnic_terminate_rport_io(struct fc_rport *rport) { int tag; int abt_tag; int term_cnt = 0; struct fnic_io_req *io_req; spinlock_t *io_lock; unsigned long flags; struct scsi_cmnd *sc; struct scsi_lun fc_lun; struct fc_rport_libfc_priv *rdata; struct fc_lport *lport; struct fnic *fnic; struct fc_rport *cmd_rport; struct reset_stats *reset_stats; struct terminate_stats *term_stats; enum fnic_ioreq_state old_ioreq_state; if (!rport) { printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); return; } rdata = rport->dd_data; if (!rdata) { printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); return; } lport = rdata->local_port; if (!lport) { printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); return; } fnic = lport_priv(lport); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_terminate_rport_io called" " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", rport->port_name, rport->node_name, rport, rport->port_id); if (fnic->in_remove) return; reset_stats = &fnic->fnic_stats.reset_stats; term_stats = &fnic->fnic_stats.term_stats; for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { abt_tag = tag; io_lock = fnic_io_lock_tag(fnic, tag); spin_lock_irqsave(io_lock, flags); sc = scsi_host_find_tag(fnic->lport->host, tag); if (!sc) { spin_unlock_irqrestore(io_lock, flags); continue; } cmd_rport = starget_to_rport(scsi_target(sc->device)); if (rport != cmd_rport) { spin_unlock_irqrestore(io_lock, flags); continue; } io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req || rport != cmd_rport) { spin_unlock_irqrestore(io_lock, flags); continue; } if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", sc); spin_unlock_irqrestore(io_lock, flags); continue; } /* * Found IO that is still pending with firmware and * belongs to rport that went away */ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { spin_unlock_irqrestore(io_lock, flags); continue; } if (io_req->abts_done) { shost_printk(KERN_ERR, fnic->lport->host, "fnic_terminate_rport_io: io_req->abts_done is set " "state is %s\n", fnic_ioreq_state_to_str(CMD_STATE(sc))); } if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "fnic_terminate_rport_io " "IO not yet issued %p tag 0x%x flags " "%x state %d\n", sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); } old_ioreq_state = CMD_STATE(sc); CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { atomic64_inc(&reset_stats->device_reset_terminates); abt_tag = (tag | FNIC_TAG_DEV_RST); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); } BUG_ON(io_req->abts_done); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_terminate_rport_io: Issuing abts\n"); spin_unlock_irqrestore(io_lock, flags); /* Now queue the abort command to firmware */ int_to_scsilun(sc->device->lun, &fc_lun); if (fnic_queue_abort_io_req(fnic, abt_tag, FCPIO_ITMF_ABT_TASK_TERM, fc_lun.scsi_lun, io_req)) { /* * Revert the cmd state back to old state, if * it hasn't changed in between. This cmd will get * aborted later by scsi_eh, or cleaned up during * lun reset */ spin_lock_irqsave(io_lock, flags); if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) CMD_STATE(sc) = old_ioreq_state; spin_unlock_irqrestore(io_lock, flags); } else { spin_lock_irqsave(io_lock, flags); if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; else CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; spin_unlock_irqrestore(io_lock, flags); atomic64_inc(&term_stats->terminates); term_cnt++; } } if (term_cnt > atomic64_read(&term_stats->max_terminates)) atomic64_set(&term_stats->max_terminates, term_cnt); } /* * This function is exported to SCSI for sending abort cmnds. * A SCSI IO is represented by a io_req in the driver. * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. */ int fnic_abort_cmd(struct scsi_cmnd *sc) { struct fc_lport *lp; struct fnic *fnic; struct fnic_io_req *io_req = NULL; struct fc_rport *rport; spinlock_t *io_lock; unsigned long flags; unsigned long start_time = 0; int ret = SUCCESS; u32 task_req = 0; struct scsi_lun fc_lun; struct fnic_stats *fnic_stats; struct abort_stats *abts_stats; struct terminate_stats *term_stats; enum fnic_ioreq_state old_ioreq_state; int tag; unsigned long abt_issued_time; DECLARE_COMPLETION_ONSTACK(tm_done); /* Wait for rport to unblock */ fc_block_scsi_eh(sc); /* Get local-port, check ready and link up */ lp = shost_priv(sc->device->host); fnic = lport_priv(lp); fnic_stats = &fnic->fnic_stats; abts_stats = &fnic->fnic_stats.abts_stats; term_stats = &fnic->fnic_stats.term_stats; rport = starget_to_rport(scsi_target(sc->device)); tag = sc->request->tag; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); CMD_FLAGS(sc) = FNIC_NO_FLAGS; if (lp->state != LPORT_ST_READY || !(lp->link_up)) { ret = FAILED; goto fnic_abort_cmd_end; } /* * Avoid a race between SCSI issuing the abort and the device * completing the command. * * If the command is already completed by the fw cmpl code, * we just return SUCCESS from here. This means that the abort * succeeded. In the SCSI ML, since the timeout for command has * happened, the completion wont actually complete the command * and it will be considered as an aborted command * * The CMD_SP will not be cleared except while holding io_req_lock. */ io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req) { spin_unlock_irqrestore(io_lock, flags); goto fnic_abort_cmd_end; } io_req->abts_done = &tm_done; if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { spin_unlock_irqrestore(io_lock, flags); goto wait_pending; } abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); if (abt_issued_time <= 6000) atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); else if (abt_issued_time > 6000 && abt_issued_time <= 20000) atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); else if (abt_issued_time > 20000 && abt_issued_time <= 30000) atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); else if (abt_issued_time > 30000 && abt_issued_time <= 40000) atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); else if (abt_issued_time > 40000 && abt_issued_time <= 50000) atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); else if (abt_issued_time > 50000 && abt_issued_time <= 60000) atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); else atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); /* * Command is still pending, need to abort it * If the firmware completes the command after this point, * the completion wont be done till mid-layer, since abort * has already started. */ old_ioreq_state = CMD_STATE(sc); CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; spin_unlock_irqrestore(io_lock, flags); /* * Check readiness of the remote port. If the path to remote * port is up, then send abts to the remote port to terminate * the IO. Else, just locally terminate the IO in the firmware */ if (fc_remote_port_chkready(rport) == 0) task_req = FCPIO_ITMF_ABT_TASK; else { atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); task_req = FCPIO_ITMF_ABT_TASK_TERM; } /* Now queue the abort command to firmware */ int_to_scsilun(sc->device->lun, &fc_lun); if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, fc_lun.scsi_lun, io_req)) { spin_lock_irqsave(io_lock, flags); if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) CMD_STATE(sc) = old_ioreq_state; io_req = (struct fnic_io_req *)CMD_SP(sc); if (io_req) io_req->abts_done = NULL; spin_unlock_irqrestore(io_lock, flags); ret = FAILED; goto fnic_abort_cmd_end; } if (task_req == FCPIO_ITMF_ABT_TASK) { CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; atomic64_inc(&fnic_stats->abts_stats.aborts); } else { CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; atomic64_inc(&fnic_stats->term_stats.terminates); } /* * We queued an abort IO, wait for its completion. * Once the firmware completes the abort command, it will * wake up this thread. */ wait_pending: wait_for_completion_timeout(&tm_done, msecs_to_jiffies (2 * fnic->config.ra_tov + fnic->config.ed_tov)); /* Check the abort status */ spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req) { atomic64_inc(&fnic_stats->io_stats.ioreq_null); spin_unlock_irqrestore(io_lock, flags); CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; ret = FAILED; goto fnic_abort_cmd_end; } io_req->abts_done = NULL; /* fw did not complete abort, timed out */ if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { spin_unlock_irqrestore(io_lock, flags); if (task_req == FCPIO_ITMF_ABT_TASK) { atomic64_inc(&abts_stats->abort_drv_timeouts); } else { atomic64_inc(&term_stats->terminate_drv_timeouts); } CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; ret = FAILED; goto fnic_abort_cmd_end; } /* IO out of order */ if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { spin_unlock_irqrestore(io_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Issuing Host reset due to out of order IO\n"); ret = FAILED; goto fnic_abort_cmd_end; } CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; start_time = io_req->start_time; /* * firmware completed the abort, check the status, * free the io_req if successful. If abort fails, * Device reset will clean the I/O. */ if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) CMD_SP(sc) = NULL; else { ret = FAILED; spin_unlock_irqrestore(io_lock, flags); goto fnic_abort_cmd_end; } spin_unlock_irqrestore(io_lock, flags); fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); if (sc->scsi_done) { /* Call SCSI completion function to complete the IO */ sc->result = (DID_ABORT << 16); sc->scsi_done(sc); atomic64_dec(&fnic_stats->io_stats.active_ios); if (atomic64_read(&fnic->io_cmpl_skip)) atomic64_dec(&fnic->io_cmpl_skip); else atomic64_inc(&fnic_stats->io_stats.io_completions); } fnic_abort_cmd_end: FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, sc->request->tag, sc, jiffies_to_msecs(jiffies - start_time), 0, ((u64)sc->cmnd[0] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Returning from abort cmd type %x %s\n", task_req, (ret == SUCCESS) ? "SUCCESS" : "FAILED"); return ret; } static inline int fnic_queue_dr_io_req(struct fnic *fnic, struct scsi_cmnd *sc, struct fnic_io_req *io_req) { struct vnic_wq_copy *wq = &fnic->wq_copy[0]; struct Scsi_Host *host = fnic->lport->host; struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; struct scsi_lun fc_lun; int ret = 0; unsigned long intr_flags; spin_lock_irqsave(host->host_lock, intr_flags); if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { spin_unlock_irqrestore(host->host_lock, intr_flags); return FAILED; } else atomic_inc(&fnic->in_flight); spin_unlock_irqrestore(host->host_lock, intr_flags); spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) free_wq_copy_descs(fnic, wq); if (!vnic_wq_copy_desc_avail(wq)) { FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "queue_dr_io_req failure - no descriptors\n"); atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); ret = -EAGAIN; goto lr_io_req_end; } /* fill in the lun info */ int_to_scsilun(sc->device->lun, &fc_lun); fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, fc_lun.scsi_lun, io_req->port_id, fnic->config.ra_tov, fnic->config.ed_tov); atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); lr_io_req_end: spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); atomic_dec(&fnic->in_flight); return ret; } /* * Clean up any pending aborts on the lun * For each outstanding IO on this lun, whose abort is not completed by fw, * issue a local abort. Wait for abort to complete. Return 0 if all commands * successfully aborted, 1 otherwise */ static int fnic_clean_pending_aborts(struct fnic *fnic, struct scsi_cmnd *lr_sc, bool new_sc) { int tag, abt_tag; struct fnic_io_req *io_req; spinlock_t *io_lock; unsigned long flags; int ret = 0; struct scsi_cmnd *sc; struct scsi_lun fc_lun; struct scsi_device *lun_dev = lr_sc->device; DECLARE_COMPLETION_ONSTACK(tm_done); enum fnic_ioreq_state old_ioreq_state; for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { io_lock = fnic_io_lock_tag(fnic, tag); spin_lock_irqsave(io_lock, flags); sc = scsi_host_find_tag(fnic->lport->host, tag); /* * ignore this lun reset cmd if issued using new SC * or cmds that do not belong to this lun */ if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) { spin_unlock_irqrestore(io_lock, flags); continue; } io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req || sc->device != lun_dev) { spin_unlock_irqrestore(io_lock, flags); continue; } /* * Found IO that is still pending with firmware and * belongs to the LUN that we are resetting */ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Found IO in %s on lun\n", fnic_ioreq_state_to_str(CMD_STATE(sc))); if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { spin_unlock_irqrestore(io_lock, flags); continue; } if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "%s dev rst not pending sc 0x%p\n", __func__, sc); spin_unlock_irqrestore(io_lock, flags); continue; } if (io_req->abts_done) shost_printk(KERN_ERR, fnic->lport->host, "%s: io_req->abts_done is set state is %s\n", __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); old_ioreq_state = CMD_STATE(sc); /* * Any pending IO issued prior to reset is expected to be * in abts pending state, if not we need to set * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. * When IO is completed, the IO will be handed over and * handled in this function. */ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; BUG_ON(io_req->abts_done); abt_tag = tag; if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { abt_tag |= FNIC_TAG_DEV_RST; FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "%s: dev rst sc 0x%p\n", __func__, sc); } CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; io_req->abts_done = &tm_done; spin_unlock_irqrestore(io_lock, flags); /* Now queue the abort command to firmware */ int_to_scsilun(sc->device->lun, &fc_lun); if (fnic_queue_abort_io_req(fnic, abt_tag, FCPIO_ITMF_ABT_TASK_TERM, fc_lun.scsi_lun, io_req)) { spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (io_req) io_req->abts_done = NULL; if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) CMD_STATE(sc) = old_ioreq_state; spin_unlock_irqrestore(io_lock, flags); ret = 1; goto clean_pending_aborts_end; } else { spin_lock_irqsave(io_lock, flags); if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; spin_unlock_irqrestore(io_lock, flags); } CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; wait_for_completion_timeout(&tm_done, msecs_to_jiffies (fnic->config.ed_tov)); /* Recheck cmd state to check if it is now aborted */ spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req) { spin_unlock_irqrestore(io_lock, flags); CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; continue; } io_req->abts_done = NULL; /* if abort is still pending with fw, fail */ if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { spin_unlock_irqrestore(io_lock, flags); CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; ret = 1; goto clean_pending_aborts_end; } CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; /* original sc used for lr is handled by dev reset code */ if (sc != lr_sc) CMD_SP(sc) = NULL; spin_unlock_irqrestore(io_lock, flags); /* original sc used for lr is handled by dev reset code */ if (sc != lr_sc) { fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); } /* * Any IO is returned during reset, it needs to call scsi_done * to return the scsi_cmnd to upper layer. */ if (sc->scsi_done) { /* Set result to let upper SCSI layer retry */ sc->result = DID_RESET << 16; sc->scsi_done(sc); } } schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); /* walk again to check, if IOs are still pending in fw */ if (fnic_is_abts_pending(fnic, lr_sc)) ret = FAILED; clean_pending_aborts_end: return ret; } /** * fnic_scsi_host_start_tag * Allocates tagid from host's tag list **/ static inline int fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) { struct request_queue *q = sc->request->q; struct request *dummy; dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); if (IS_ERR(dummy)) return SCSI_NO_TAG; sc->tag = sc->request->tag = dummy->tag; sc->host_scribble = (unsigned char *)dummy; return dummy->tag; } /** * fnic_scsi_host_end_tag * frees tag allocated by fnic_scsi_host_start_tag. **/ static inline void fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) { struct request *dummy = (struct request *)sc->host_scribble; blk_mq_free_request(dummy); } /* * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN * fail to get aborted. It calls driver's eh_device_reset with a SCSI command * on the LUN. */ int fnic_device_reset(struct scsi_cmnd *sc) { struct fc_lport *lp; struct fnic *fnic; struct fnic_io_req *io_req = NULL; struct fc_rport *rport; int status; int ret = FAILED; spinlock_t *io_lock; unsigned long flags; unsigned long start_time = 0; struct scsi_lun fc_lun; struct fnic_stats *fnic_stats; struct reset_stats *reset_stats; int tag = 0; DECLARE_COMPLETION_ONSTACK(tm_done); int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ bool new_sc = 0; /* Wait for rport to unblock */ fc_block_scsi_eh(sc); /* Get local-port, check ready and link up */ lp = shost_priv(sc->device->host); fnic = lport_priv(lp); fnic_stats = &fnic->fnic_stats; reset_stats = &fnic->fnic_stats.reset_stats; atomic64_inc(&reset_stats->device_resets); rport = starget_to_rport(scsi_target(sc->device)); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", rport->port_id, sc->device->lun, sc); if (lp->state != LPORT_ST_READY || !(lp->link_up)) goto fnic_device_reset_end; /* Check if remote port up */ if (fc_remote_port_chkready(rport)) { atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); goto fnic_device_reset_end; } CMD_FLAGS(sc) = FNIC_DEVICE_RESET; /* Allocate tag if not present */ tag = sc->request->tag; if (unlikely(tag < 0)) { /* * Really should fix the midlayer to pass in a proper * request for ioctls... */ tag = fnic_scsi_host_start_tag(fnic, sc); if (unlikely(tag == SCSI_NO_TAG)) goto fnic_device_reset_end; tag_gen_flag = 1; new_sc = 1; } io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); /* * If there is a io_req attached to this command, then use it, * else allocate a new one. */ if (!io_req) { io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); if (!io_req) { spin_unlock_irqrestore(io_lock, flags); goto fnic_device_reset_end; } memset(io_req, 0, sizeof(*io_req)); io_req->port_id = rport->port_id; CMD_SP(sc) = (char *)io_req; } io_req->dr_done = &tm_done; CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; spin_unlock_irqrestore(io_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); /* * issue the device reset, if enqueue failed, clean up the ioreq * and break assoc with scsi cmd */ if (fnic_queue_dr_io_req(fnic, sc, io_req)) { spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (io_req) io_req->dr_done = NULL; goto fnic_device_reset_clean; } spin_lock_irqsave(io_lock, flags); CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; spin_unlock_irqrestore(io_lock, flags); /* * Wait on the local completion for LUN reset. The io_req may be * freed while we wait since we hold no lock. */ wait_for_completion_timeout(&tm_done, msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req) { spin_unlock_irqrestore(io_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "io_req is null tag 0x%x sc 0x%p\n", tag, sc); goto fnic_device_reset_end; } io_req->dr_done = NULL; status = CMD_LR_STATUS(sc); /* * If lun reset not completed, bail out with failed. io_req * gets cleaned up during higher levels of EH */ if (status == FCPIO_INVALID_CODE) { atomic64_inc(&reset_stats->device_reset_timeouts); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Device reset timed out\n"); CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; spin_unlock_irqrestore(io_lock, flags); int_to_scsilun(sc->device->lun, &fc_lun); /* * Issue abort and terminate on device reset request. * If q'ing of terminate fails, retry it after a delay. */ while (1) { spin_lock_irqsave(io_lock, flags); if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { spin_unlock_irqrestore(io_lock, flags); break; } spin_unlock_irqrestore(io_lock, flags); if (fnic_queue_abort_io_req(fnic, tag | FNIC_TAG_DEV_RST, FCPIO_ITMF_ABT_TASK_TERM, fc_lun.scsi_lun, io_req)) { wait_for_completion_timeout(&tm_done, msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); } else { spin_lock_irqsave(io_lock, flags); CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; io_req->abts_done = &tm_done; spin_unlock_irqrestore(io_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Abort and terminate issued on Device reset " "tag 0x%x sc 0x%p\n", tag, sc); break; } } while (1) { spin_lock_irqsave(io_lock, flags); if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { spin_unlock_irqrestore(io_lock, flags); wait_for_completion_timeout(&tm_done, msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); break; } else { io_req = (struct fnic_io_req *)CMD_SP(sc); io_req->abts_done = NULL; goto fnic_device_reset_clean; } } } else { spin_unlock_irqrestore(io_lock, flags); } /* Completed, but not successful, clean up the io_req, return fail */ if (status != FCPIO_SUCCESS) { spin_lock_irqsave(io_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Device reset completed - failed\n"); io_req = (struct fnic_io_req *)CMD_SP(sc); goto fnic_device_reset_clean; } /* * Clean up any aborts on this lun that have still not * completed. If any of these fail, then LUN reset fails. * clean_pending_aborts cleans all cmds on this lun except * the lun reset cmd. If all cmds get cleaned, the lun reset * succeeds */ if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Device reset failed" " since could not abort all IOs\n"); goto fnic_device_reset_clean; } /* Clean lun reset command */ spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (io_req) /* Completed, and successful */ ret = SUCCESS; fnic_device_reset_clean: if (io_req) CMD_SP(sc) = NULL; spin_unlock_irqrestore(io_lock, flags); if (io_req) { start_time = io_req->start_time; fnic_release_ioreq_buf(fnic, io_req, sc); mempool_free(io_req, fnic->io_req_pool); } fnic_device_reset_end: FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, sc->request->tag, sc, jiffies_to_msecs(jiffies - start_time), 0, ((u64)sc->cmnd[0] << 32 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); /* free tag if it is allocated */ if (unlikely(tag_gen_flag)) fnic_scsi_host_end_tag(fnic, sc); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Returning from device reset %s\n", (ret == SUCCESS) ? "SUCCESS" : "FAILED"); if (ret == FAILED) atomic64_inc(&reset_stats->device_reset_failures); return ret; } /* Clean up all IOs, clean up libFC local port */ int fnic_reset(struct Scsi_Host *shost) { struct fc_lport *lp; struct fnic *fnic; int ret = 0; struct reset_stats *reset_stats; lp = shost_priv(shost); fnic = lport_priv(lp); reset_stats = &fnic->fnic_stats.reset_stats; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_reset called\n"); atomic64_inc(&reset_stats->fnic_resets); /* * Reset local port, this will clean up libFC exchanges, * reset remote port sessions, and if link is up, begin flogi */ ret = fc_lport_reset(lp); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "Returning from fnic reset %s\n", (ret == 0) ? "SUCCESS" : "FAILED"); if (ret == 0) atomic64_inc(&reset_stats->fnic_reset_completions); else atomic64_inc(&reset_stats->fnic_reset_failures); return ret; } /* * SCSI Error handling calls driver's eh_host_reset if all prior * error handling levels return FAILED. If host reset completes * successfully, and if link is up, then Fabric login begins. * * Host Reset is the highest level of error recovery. If this fails, then * host is offlined by SCSI. * */ int fnic_host_reset(struct scsi_cmnd *sc) { int ret; unsigned long wait_host_tmo; struct Scsi_Host *shost = sc->device->host; struct fc_lport *lp = shost_priv(shost); struct fnic *fnic = lport_priv(lp); unsigned long flags; spin_lock_irqsave(&fnic->fnic_lock, flags); if (!fnic->internal_reset_inprogress) { fnic->internal_reset_inprogress = true; } else { spin_unlock_irqrestore(&fnic->fnic_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "host reset in progress skipping another host reset\n"); return SUCCESS; } spin_unlock_irqrestore(&fnic->fnic_lock, flags); /* * If fnic_reset is successful, wait for fabric login to complete * scsi-ml tries to send a TUR to every device if host reset is * successful, so before returning to scsi, fabric should be up */ ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; if (ret == SUCCESS) { wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; ret = FAILED; while (time_before(jiffies, wait_host_tmo)) { if ((lp->state == LPORT_ST_READY) && (lp->link_up)) { ret = SUCCESS; break; } ssleep(1); } } spin_lock_irqsave(&fnic->fnic_lock, flags); fnic->internal_reset_inprogress = false; spin_unlock_irqrestore(&fnic->fnic_lock, flags); return ret; } /* * This fxn is called from libFC when host is removed */ void fnic_scsi_abort_io(struct fc_lport *lp) { int err = 0; unsigned long flags; enum fnic_state old_state; struct fnic *fnic = lport_priv(lp); DECLARE_COMPLETION_ONSTACK(remove_wait); /* Issue firmware reset for fnic, wait for reset to complete */ retry_fw_reset: spin_lock_irqsave(&fnic->fnic_lock, flags); if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { /* fw reset is in progress, poll for its completion */ spin_unlock_irqrestore(&fnic->fnic_lock, flags); schedule_timeout(msecs_to_jiffies(100)); goto retry_fw_reset; } fnic->remove_wait = &remove_wait; old_state = fnic->state; fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); spin_unlock_irqrestore(&fnic->fnic_lock, flags); err = fnic_fw_reset_handler(fnic); if (err) { spin_lock_irqsave(&fnic->fnic_lock, flags); if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) fnic->state = old_state; fnic->remove_wait = NULL; spin_unlock_irqrestore(&fnic->fnic_lock, flags); return; } /* Wait for firmware reset to complete */ wait_for_completion_timeout(&remove_wait, msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); spin_lock_irqsave(&fnic->fnic_lock, flags); fnic->remove_wait = NULL; FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_scsi_abort_io %s\n", (fnic->state == FNIC_IN_ETH_MODE) ? "SUCCESS" : "FAILED"); spin_unlock_irqrestore(&fnic->fnic_lock, flags); } /* * This fxn called from libFC to clean up driver IO state on link down */ void fnic_scsi_cleanup(struct fc_lport *lp) { unsigned long flags; enum fnic_state old_state; struct fnic *fnic = lport_priv(lp); /* issue fw reset */ retry_fw_reset: spin_lock_irqsave(&fnic->fnic_lock, flags); if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { /* fw reset is in progress, poll for its completion */ spin_unlock_irqrestore(&fnic->fnic_lock, flags); schedule_timeout(msecs_to_jiffies(100)); goto retry_fw_reset; } old_state = fnic->state; fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); spin_unlock_irqrestore(&fnic->fnic_lock, flags); if (fnic_fw_reset_handler(fnic)) { spin_lock_irqsave(&fnic->fnic_lock, flags); if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) fnic->state = old_state; spin_unlock_irqrestore(&fnic->fnic_lock, flags); } } void fnic_empty_scsi_cleanup(struct fc_lport *lp) { } void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) { struct fnic *fnic = lport_priv(lp); /* Non-zero sid, nothing to do */ if (sid) goto call_fc_exch_mgr_reset; if (did) { fnic_rport_exch_reset(fnic, did); goto call_fc_exch_mgr_reset; } /* * sid = 0, did = 0 * link down or device being removed */ if (!fnic->in_remove) fnic_scsi_cleanup(lp); else fnic_scsi_abort_io(lp); /* call libFC exch mgr reset to reset its exchanges */ call_fc_exch_mgr_reset: fc_exch_mgr_reset(lp, sid, did); } /* * fnic_is_abts_pending() is a helper function that * walks through tag map to check if there is any IOs pending,if there is one, * then it returns 1 (true), otherwise 0 (false) * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, * otherwise, it checks for all IOs. */ int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) { int tag; struct fnic_io_req *io_req; spinlock_t *io_lock; unsigned long flags; int ret = 0; struct scsi_cmnd *sc; struct scsi_device *lun_dev = NULL; if (lr_sc) lun_dev = lr_sc->device; /* walk again to check, if IOs are still pending in fw */ for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { sc = scsi_host_find_tag(fnic->lport->host, tag); /* * ignore this lun reset cmd or cmds that do not belong to * this lun */ if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) continue; io_lock = fnic_io_lock_hash(fnic, sc); spin_lock_irqsave(io_lock, flags); io_req = (struct fnic_io_req *)CMD_SP(sc); if (!io_req || sc->device != lun_dev) { spin_unlock_irqrestore(io_lock, flags); continue; } /* * Found IO that is still pending with firmware and * belongs to the LUN that we are resetting */ FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, "Found IO in %s on lun\n", fnic_ioreq_state_to_str(CMD_STATE(sc))); if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) ret = 1; spin_unlock_irqrestore(io_lock, flags); } return ret; }
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