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3256b46823
We need to check for a valid io_req before we check other data. Also, remove redundant checks. Link: https://lore.kernel.org/r/20201121023337.19295-1-kartilak@cisco.com Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com> Co-developed-by: Satish Kharat <satishkh@cisco.com> Signed-off-by: Satish Kharat <satishkh@cisco.com> Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2832 lines
81 KiB
C
2832 lines
81 KiB
C
/*
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* Copyright 2008 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/mempool.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/workqueue.h>
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#include <linux/pci.h>
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#include <linux/scatterlist.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/etherdevice.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/delay.h>
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#include <linux/gfp.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/fc/fc_els.h>
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#include <scsi/fc/fc_fcoe.h>
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#include <scsi/libfc.h>
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#include <scsi/fc_frame.h>
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#include "fnic_io.h"
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#include "fnic.h"
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const char *fnic_state_str[] = {
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[FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
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[FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
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[FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
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[FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
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};
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static const char *fnic_ioreq_state_str[] = {
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[FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
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[FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
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[FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
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[FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
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[FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
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};
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static const char *fcpio_status_str[] = {
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[FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
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[FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
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[FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
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[FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
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[FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
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[FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
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[FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
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[FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
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[FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
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[FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
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[FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
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[FCPIO_FW_ERR] = "FCPIO_FW_ERR",
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[FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
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[FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
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[FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
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[FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
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[FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
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[FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
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[FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
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};
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const char *fnic_state_to_str(unsigned int state)
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{
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if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
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return "unknown";
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return fnic_state_str[state];
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}
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static const char *fnic_ioreq_state_to_str(unsigned int state)
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{
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if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
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!fnic_ioreq_state_str[state])
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return "unknown";
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return fnic_ioreq_state_str[state];
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}
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static const char *fnic_fcpio_status_to_str(unsigned int status)
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{
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if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
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return "unknown";
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return fcpio_status_str[status];
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}
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static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
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static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
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struct scsi_cmnd *sc)
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{
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u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
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return &fnic->io_req_lock[hash];
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}
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static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
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int tag)
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{
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return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
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}
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/*
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* Unmap the data buffer and sense buffer for an io_req,
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* also unmap and free the device-private scatter/gather list.
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*/
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static void fnic_release_ioreq_buf(struct fnic *fnic,
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struct fnic_io_req *io_req,
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struct scsi_cmnd *sc)
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{
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if (io_req->sgl_list_pa)
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dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
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sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
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DMA_TO_DEVICE);
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scsi_dma_unmap(sc);
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if (io_req->sgl_cnt)
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mempool_free(io_req->sgl_list_alloc,
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fnic->io_sgl_pool[io_req->sgl_type]);
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if (io_req->sense_buf_pa)
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dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
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SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
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}
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/* Free up Copy Wq descriptors. Called with copy_wq lock held */
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static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
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{
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/* if no Ack received from firmware, then nothing to clean */
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if (!fnic->fw_ack_recd[0])
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return 1;
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/*
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* Update desc_available count based on number of freed descriptors
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* Account for wraparound
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*/
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if (wq->to_clean_index <= fnic->fw_ack_index[0])
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wq->ring.desc_avail += (fnic->fw_ack_index[0]
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- wq->to_clean_index + 1);
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else
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wq->ring.desc_avail += (wq->ring.desc_count
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- wq->to_clean_index
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+ fnic->fw_ack_index[0] + 1);
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/*
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* just bump clean index to ack_index+1 accounting for wraparound
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* this will essentially free up all descriptors between
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* to_clean_index and fw_ack_index, both inclusive
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*/
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wq->to_clean_index =
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(fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
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/* we have processed the acks received so far */
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fnic->fw_ack_recd[0] = 0;
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return 0;
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}
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/**
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* __fnic_set_state_flags
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* Sets/Clears bits in fnic's state_flags
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**/
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void
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__fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
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unsigned long clearbits)
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{
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unsigned long flags = 0;
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unsigned long host_lock_flags = 0;
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spin_lock_irqsave(&fnic->fnic_lock, flags);
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spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);
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if (clearbits)
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fnic->state_flags &= ~st_flags;
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else
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fnic->state_flags |= st_flags;
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spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags);
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spin_unlock_irqrestore(&fnic->fnic_lock, flags);
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return;
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}
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/*
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* fnic_fw_reset_handler
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* Routine to send reset msg to fw
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*/
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int fnic_fw_reset_handler(struct fnic *fnic)
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{
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struct vnic_wq_copy *wq = &fnic->wq_copy[0];
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int ret = 0;
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unsigned long flags;
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/* indicate fwreset to io path */
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fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
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skb_queue_purge(&fnic->frame_queue);
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skb_queue_purge(&fnic->tx_queue);
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/* wait for io cmpl */
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while (atomic_read(&fnic->in_flight))
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schedule_timeout(msecs_to_jiffies(1));
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spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
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if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
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free_wq_copy_descs(fnic, wq);
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if (!vnic_wq_copy_desc_avail(wq))
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ret = -EAGAIN;
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else {
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fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
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atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
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if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
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atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
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atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
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atomic64_read(
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&fnic->fnic_stats.fw_stats.active_fw_reqs));
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}
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spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
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if (!ret) {
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atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
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FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
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"Issued fw reset\n");
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} else {
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fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
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FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
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"Failed to issue fw reset\n");
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}
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return ret;
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}
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/*
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* fnic_flogi_reg_handler
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* Routine to send flogi register msg to fw
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*/
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int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
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{
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struct vnic_wq_copy *wq = &fnic->wq_copy[0];
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enum fcpio_flogi_reg_format_type format;
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struct fc_lport *lp = fnic->lport;
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u8 gw_mac[ETH_ALEN];
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int ret = 0;
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unsigned long flags;
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spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
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if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
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free_wq_copy_descs(fnic, wq);
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if (!vnic_wq_copy_desc_avail(wq)) {
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ret = -EAGAIN;
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goto flogi_reg_ioreq_end;
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}
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if (fnic->ctlr.map_dest) {
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eth_broadcast_addr(gw_mac);
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format = FCPIO_FLOGI_REG_DEF_DEST;
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} else {
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memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
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format = FCPIO_FLOGI_REG_GW_DEST;
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}
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if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
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fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
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fc_id, gw_mac,
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fnic->data_src_addr,
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lp->r_a_tov, lp->e_d_tov);
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FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
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"FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
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fc_id, fnic->data_src_addr, gw_mac);
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} else {
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fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
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format, fc_id, gw_mac);
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FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
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"FLOGI reg issued fcid %x map %d dest %pM\n",
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fc_id, fnic->ctlr.map_dest, gw_mac);
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}
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atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
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if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
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atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
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atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
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atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
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flogi_reg_ioreq_end:
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spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
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return ret;
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}
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/*
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* fnic_queue_wq_copy_desc
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* Routine to enqueue a wq copy desc
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*/
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static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
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struct vnic_wq_copy *wq,
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struct fnic_io_req *io_req,
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struct scsi_cmnd *sc,
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int sg_count)
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{
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struct scatterlist *sg;
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struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
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struct fc_rport_libfc_priv *rp = rport->dd_data;
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struct host_sg_desc *desc;
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struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
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unsigned int i;
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unsigned long intr_flags;
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int flags;
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u8 exch_flags;
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struct scsi_lun fc_lun;
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if (sg_count) {
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/* For each SGE, create a device desc entry */
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desc = io_req->sgl_list;
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for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
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desc->addr = cpu_to_le64(sg_dma_address(sg));
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desc->len = cpu_to_le32(sg_dma_len(sg));
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desc->_resvd = 0;
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desc++;
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}
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io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
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io_req->sgl_list,
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sizeof(io_req->sgl_list[0]) * sg_count,
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DMA_TO_DEVICE);
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if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) {
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printk(KERN_ERR "DMA mapping failed\n");
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return SCSI_MLQUEUE_HOST_BUSY;
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}
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}
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io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
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sc->sense_buffer,
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SCSI_SENSE_BUFFERSIZE,
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DMA_FROM_DEVICE);
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if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) {
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dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
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sizeof(io_req->sgl_list[0]) * sg_count,
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DMA_TO_DEVICE);
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printk(KERN_ERR "DMA mapping failed\n");
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return SCSI_MLQUEUE_HOST_BUSY;
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}
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int_to_scsilun(sc->device->lun, &fc_lun);
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/* Enqueue the descriptor in the Copy WQ */
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spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
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if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
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free_wq_copy_descs(fnic, wq);
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if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
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spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
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FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
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"fnic_queue_wq_copy_desc failure - no descriptors\n");
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atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
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return SCSI_MLQUEUE_HOST_BUSY;
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}
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flags = 0;
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if (sc->sc_data_direction == DMA_FROM_DEVICE)
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flags = FCPIO_ICMND_RDDATA;
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else if (sc->sc_data_direction == DMA_TO_DEVICE)
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flags = FCPIO_ICMND_WRDATA;
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exch_flags = 0;
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if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
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(rp->flags & FC_RP_FLAGS_RETRY))
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exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
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fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
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0, exch_flags, io_req->sgl_cnt,
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SCSI_SENSE_BUFFERSIZE,
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io_req->sgl_list_pa,
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io_req->sense_buf_pa,
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0, /* scsi cmd ref, always 0 */
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FCPIO_ICMND_PTA_SIMPLE,
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/* scsi pri and tag */
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flags, /* command flags */
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sc->cmnd, sc->cmd_len,
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scsi_bufflen(sc),
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fc_lun.scsi_lun, io_req->port_id,
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rport->maxframe_size, rp->r_a_tov,
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rp->e_d_tov);
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atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
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if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
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atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
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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);
|
|
|
|
if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) {
|
|
xfer_len -= icmnd_cmpl->residual;
|
|
scsi_set_resid(sc, 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);
|
|
continue;
|
|
}
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
io_req = (struct fnic_io_req *)CMD_SP(sc);
|
|
if (!io_req) {
|
|
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;
|
|
}
|
|
|
|
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) &&
|
|
fnic->link_events) {
|
|
/* 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;
|
|
}
|