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linux/drivers/scsi/lpfc/lpfc_nvme.c
James Smart 7438273fa2 scsi: lpfc: Fix crash in blk_mq layer when executing modprobe -r lpfc 
modprobe -r lpfc produces the following:

Call Trace:
 __blk_mq_run_hw_queue+0xa2/0xb0
 __blk_mq_delay_run_hw_queue+0x9d/0xb0
 ? blk_mq_hctx_has_pending+0x32/0x80
 blk_mq_run_hw_queue+0x50/0xd0
 blk_mq_sched_insert_request+0x110/0x1b0
 blk_execute_rq_nowait+0x76/0x180
 nvme_keep_alive_work+0x8a/0xd0 [nvme_core]
 process_one_work+0x17f/0x440
 worker_thread+0x126/0x3c0
 ? manage_workers.isra.24+0x2a0/0x2a0
 kthread+0xd1/0xe0
 ? insert_kthread_work+0x40/0x40
 ret_from_fork_nospec_begin+0x21/0x21
 ? insert_kthread_work+0x40/0x40

However, rmmod lpfc would run correctly.

When an nvme remoteport is unregistered with the host nvme transport, it
needs to set the remoteport->dev_loss_tmo value 0 to indicate an immediate
termination of device loss and prevent any further keep alives to that
rport.  The driver was never setting dev_loss_tmo causing the nvme
transport to continue to send the keep alive.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-05-28 22:40:33 -04:00

2998 lines
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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
* Copyright (C) 2004-2016 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.broadcom.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of version 2 of the GNU General *
* Public License as published by the Free Software Foundation. *
* This program is distributed in the hope that it will be useful. *
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
* TO BE LEGALLY INVALID. See the GNU General Public License for *
* more details, a copy of which can be found in the file COPYING *
* included with this package. *
********************************************************************/
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <asm/unaligned.h>
#include <linux/crc-t10dif.h>
#include <net/checksum.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/fc/fc_fs.h>
#include <linux/nvme.h>
#include <linux/nvme-fc-driver.h>
#include <linux/nvme-fc.h>
#include "lpfc_version.h"
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc.h"
#include "lpfc_nvme.h"
#include "lpfc_scsi.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_debugfs.h"
/* NVME initiator-based functions */
static struct lpfc_nvme_buf *
lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
int expedite);
static void
lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_nvme_buf *);
static struct nvme_fc_port_template lpfc_nvme_template;
static union lpfc_wqe128 lpfc_iread_cmd_template;
static union lpfc_wqe128 lpfc_iwrite_cmd_template;
static union lpfc_wqe128 lpfc_icmnd_cmd_template;
/* Setup WQE templates for NVME IOs */
void
lpfc_nvme_cmd_template(void)
{
union lpfc_wqe128 *wqe;
/* IREAD template */
wqe = &lpfc_iread_cmd_template;
memset(wqe, 0, sizeof(union lpfc_wqe128));
/* Word 0, 1, 2 - BDE is variable */
/* Word 3 - cmd_buff_len, payload_offset_len is zero */
/* Word 4 - total_xfer_len is variable */
/* Word 5 - is zero */
/* Word 6 - ctxt_tag, xri_tag is variable */
/* Word 7 */
bf_set(wqe_cmnd, &wqe->fcp_iread.wqe_com, CMD_FCP_IREAD64_WQE);
bf_set(wqe_pu, &wqe->fcp_iread.wqe_com, PARM_READ_CHECK);
bf_set(wqe_class, &wqe->fcp_iread.wqe_com, CLASS3);
bf_set(wqe_ct, &wqe->fcp_iread.wqe_com, SLI4_CT_RPI);
/* Word 8 - abort_tag is variable */
/* Word 9 - reqtag is variable */
/* Word 10 - dbde, wqes is variable */
bf_set(wqe_qosd, &wqe->fcp_iread.wqe_com, 0);
bf_set(wqe_nvme, &wqe->fcp_iread.wqe_com, 1);
bf_set(wqe_iod, &wqe->fcp_iread.wqe_com, LPFC_WQE_IOD_READ);
bf_set(wqe_lenloc, &wqe->fcp_iread.wqe_com, LPFC_WQE_LENLOC_WORD4);
bf_set(wqe_dbde, &wqe->fcp_iread.wqe_com, 0);
bf_set(wqe_wqes, &wqe->fcp_iread.wqe_com, 1);
/* Word 11 - pbde is variable */
bf_set(wqe_cmd_type, &wqe->fcp_iread.wqe_com, NVME_READ_CMD);
bf_set(wqe_cqid, &wqe->fcp_iread.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
bf_set(wqe_pbde, &wqe->fcp_iread.wqe_com, 1);
/* Word 12 - is zero */
/* Word 13, 14, 15 - PBDE is variable */
/* IWRITE template */
wqe = &lpfc_iwrite_cmd_template;
memset(wqe, 0, sizeof(union lpfc_wqe128));
/* Word 0, 1, 2 - BDE is variable */
/* Word 3 - cmd_buff_len, payload_offset_len is zero */
/* Word 4 - total_xfer_len is variable */
/* Word 5 - initial_xfer_len is variable */
/* Word 6 - ctxt_tag, xri_tag is variable */
/* Word 7 */
bf_set(wqe_cmnd, &wqe->fcp_iwrite.wqe_com, CMD_FCP_IWRITE64_WQE);
bf_set(wqe_pu, &wqe->fcp_iwrite.wqe_com, PARM_READ_CHECK);
bf_set(wqe_class, &wqe->fcp_iwrite.wqe_com, CLASS3);
bf_set(wqe_ct, &wqe->fcp_iwrite.wqe_com, SLI4_CT_RPI);
/* Word 8 - abort_tag is variable */
/* Word 9 - reqtag is variable */
/* Word 10 - dbde, wqes is variable */
bf_set(wqe_qosd, &wqe->fcp_iwrite.wqe_com, 0);
bf_set(wqe_nvme, &wqe->fcp_iwrite.wqe_com, 1);
bf_set(wqe_iod, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_IOD_WRITE);
bf_set(wqe_lenloc, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_LENLOC_WORD4);
bf_set(wqe_dbde, &wqe->fcp_iwrite.wqe_com, 0);
bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
/* Word 11 - pbde is variable */
bf_set(wqe_cmd_type, &wqe->fcp_iwrite.wqe_com, NVME_WRITE_CMD);
bf_set(wqe_cqid, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
bf_set(wqe_pbde, &wqe->fcp_iwrite.wqe_com, 1);
/* Word 12 - is zero */
/* Word 13, 14, 15 - PBDE is variable */
/* ICMND template */
wqe = &lpfc_icmnd_cmd_template;
memset(wqe, 0, sizeof(union lpfc_wqe128));
/* Word 0, 1, 2 - BDE is variable */
/* Word 3 - payload_offset_len is variable */
/* Word 4, 5 - is zero */
/* Word 6 - ctxt_tag, xri_tag is variable */
/* Word 7 */
bf_set(wqe_cmnd, &wqe->fcp_icmd.wqe_com, CMD_FCP_ICMND64_WQE);
bf_set(wqe_pu, &wqe->fcp_icmd.wqe_com, 0);
bf_set(wqe_class, &wqe->fcp_icmd.wqe_com, CLASS3);
bf_set(wqe_ct, &wqe->fcp_icmd.wqe_com, SLI4_CT_RPI);
/* Word 8 - abort_tag is variable */
/* Word 9 - reqtag is variable */
/* Word 10 - dbde, wqes is variable */
bf_set(wqe_qosd, &wqe->fcp_icmd.wqe_com, 1);
bf_set(wqe_nvme, &wqe->fcp_icmd.wqe_com, 1);
bf_set(wqe_iod, &wqe->fcp_icmd.wqe_com, LPFC_WQE_IOD_NONE);
bf_set(wqe_lenloc, &wqe->fcp_icmd.wqe_com, LPFC_WQE_LENLOC_NONE);
bf_set(wqe_dbde, &wqe->fcp_icmd.wqe_com, 0);
bf_set(wqe_wqes, &wqe->fcp_icmd.wqe_com, 1);
/* Word 11 */
bf_set(wqe_cmd_type, &wqe->fcp_icmd.wqe_com, FCP_COMMAND);
bf_set(wqe_cqid, &wqe->fcp_icmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
bf_set(wqe_pbde, &wqe->fcp_icmd.wqe_com, 0);
/* Word 12, 13, 14, 15 - is zero */
}
/**
* lpfc_nvme_create_queue -
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
* @handle: An opaque driver handle used in follow-up calls.
*
* Driver registers this routine to preallocate and initialize any
* internal data structures to bind the @qidx to its internal IO queues.
* A hardware queue maps (qidx) to a specific driver MSI-X vector/EQ/CQ/WQ.
*
* Return value :
* 0 - Success
* -EINVAL - Unsupported input value.
* -ENOMEM - Could not alloc necessary memory
**/
static int
lpfc_nvme_create_queue(struct nvme_fc_local_port *pnvme_lport,
unsigned int qidx, u16 qsize,
void **handle)
{
struct lpfc_nvme_lport *lport;
struct lpfc_vport *vport;
struct lpfc_nvme_qhandle *qhandle;
char *str;
if (!pnvme_lport->private)
return -ENOMEM;
lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
vport = lport->vport;
qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
if (qhandle == NULL)
return -ENOMEM;
qhandle->cpu_id = smp_processor_id();
qhandle->qidx = qidx;
/*
* NVME qidx == 0 is the admin queue, so both admin queue
* and first IO queue will use MSI-X vector and associated
* EQ/CQ/WQ at index 0. After that they are sequentially assigned.
*/
if (qidx) {
str = "IO "; /* IO queue */
qhandle->index = ((qidx - 1) %
vport->phba->cfg_nvme_io_channel);
} else {
str = "ADM"; /* Admin queue */
qhandle->index = qidx;
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
"6073 Binding %s HdwQueue %d (cpu %d) to "
"io_channel %d qhandle %p\n", str,
qidx, qhandle->cpu_id, qhandle->index, qhandle);
*handle = (void *)qhandle;
return 0;
}
/**
* lpfc_nvme_delete_queue -
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
* @handle: An opaque driver handle from lpfc_nvme_create_queue
*
* Driver registers this routine to free
* any internal data structures to bind the @qidx to its internal
* IO queues.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static void
lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
unsigned int qidx,
void *handle)
{
struct lpfc_nvme_lport *lport;
struct lpfc_vport *vport;
if (!pnvme_lport->private)
return;
lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
vport = lport->vport;
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
"6001 ENTER. lpfc_pnvme %p, qidx x%xi qhandle %p\n",
lport, qidx, handle);
kfree(handle);
}
static void
lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
{
struct lpfc_nvme_lport *lport = localport->private;
lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME,
"6173 localport %p delete complete\n",
lport);
/* release any threads waiting for the unreg to complete */
complete(&lport->lport_unreg_done);
}
/* lpfc_nvme_remoteport_delete
*
* @remoteport: Pointer to an nvme transport remoteport instance.
*
* This is a template downcall. NVME transport calls this function
* when it has completed the unregistration of a previously
* registered remoteport.
*
* Return value :
* None
*/
void
lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
{
struct lpfc_nvme_rport *rport = remoteport->private;
struct lpfc_vport *vport;
struct lpfc_nodelist *ndlp;
ndlp = rport->ndlp;
if (!ndlp)
goto rport_err;
vport = ndlp->vport;
if (!vport)
goto rport_err;
/* Remove this rport from the lport's list - memory is owned by the
* transport. Remove the ndlp reference for the NVME transport before
* calling state machine to remove the node.
*/
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
"6146 remoteport delete of remoteport %p\n",
remoteport);
spin_lock_irq(&vport->phba->hbalock);
/* The register rebind might have occurred before the delete
* downcall. Guard against this race.
*/
if (ndlp->upcall_flags & NLP_WAIT_FOR_UNREG) {
ndlp->nrport = NULL;
ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
}
spin_unlock_irq(&vport->phba->hbalock);
/* Remove original register reference. The host transport
* won't reference this rport/remoteport any further.
*/
lpfc_nlp_put(ndlp);
rport_err:
return;
}
static void
lpfc_nvme_cmpl_gen_req(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
struct lpfc_wcqe_complete *wcqe)
{
struct lpfc_vport *vport = cmdwqe->vport;
struct lpfc_nvme_lport *lport;
uint32_t status;
struct nvmefc_ls_req *pnvme_lsreq;
struct lpfc_dmabuf *buf_ptr;
struct lpfc_nodelist *ndlp;
pnvme_lsreq = (struct nvmefc_ls_req *)cmdwqe->context2;
status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
if (vport->localport) {
lport = (struct lpfc_nvme_lport *)vport->localport->private;
if (lport) {
atomic_inc(&lport->fc4NvmeLsCmpls);
if (status) {
if (bf_get(lpfc_wcqe_c_xb, wcqe))
atomic_inc(&lport->cmpl_ls_xb);
atomic_inc(&lport->cmpl_ls_err);
}
}
}
ndlp = (struct lpfc_nodelist *)cmdwqe->context1;
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
"6047 nvme cmpl Enter "
"Data %p DID %x Xri: %x status %x reason x%x cmd:%p "
"lsreg:%p bmp:%p ndlp:%p\n",
pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
cmdwqe->sli4_xritag, status,
(wcqe->parameter & 0xffff),
cmdwqe, pnvme_lsreq, cmdwqe->context3, ndlp);
lpfc_nvmeio_data(phba, "NVME LS CMPL: xri x%x stat x%x parm x%x\n",
cmdwqe->sli4_xritag, status, wcqe->parameter);
if (cmdwqe->context3) {
buf_ptr = (struct lpfc_dmabuf *)cmdwqe->context3;
lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
kfree(buf_ptr);
cmdwqe->context3 = NULL;
}
if (pnvme_lsreq->done)
pnvme_lsreq->done(pnvme_lsreq, status);
else
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6046 nvme cmpl without done call back? "
"Data %p DID %x Xri: %x status %x\n",
pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
cmdwqe->sli4_xritag, status);
if (ndlp) {
lpfc_nlp_put(ndlp);
cmdwqe->context1 = NULL;
}
lpfc_sli_release_iocbq(phba, cmdwqe);
}
static int
lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
struct lpfc_dmabuf *inp,
struct nvmefc_ls_req *pnvme_lsreq,
void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
struct lpfc_wcqe_complete *),
struct lpfc_nodelist *ndlp, uint32_t num_entry,
uint32_t tmo, uint8_t retry)
{
struct lpfc_hba *phba = vport->phba;
union lpfc_wqe128 *wqe;
struct lpfc_iocbq *genwqe;
struct ulp_bde64 *bpl;
struct ulp_bde64 bde;
int i, rc, xmit_len, first_len;
/* Allocate buffer for command WQE */
genwqe = lpfc_sli_get_iocbq(phba);
if (genwqe == NULL)
return 1;
wqe = &genwqe->wqe;
memset(wqe, 0, sizeof(union lpfc_wqe));
genwqe->context3 = (uint8_t *)bmp;
genwqe->iocb_flag |= LPFC_IO_NVME_LS;
/* Save for completion so we can release these resources */
genwqe->context1 = lpfc_nlp_get(ndlp);
genwqe->context2 = (uint8_t *)pnvme_lsreq;
/* Fill in payload, bp points to frame payload */
if (!tmo)
/* FC spec states we need 3 * ratov for CT requests */
tmo = (3 * phba->fc_ratov);
/* For this command calculate the xmit length of the request bde. */
xmit_len = 0;
first_len = 0;
bpl = (struct ulp_bde64 *)bmp->virt;
for (i = 0; i < num_entry; i++) {
bde.tus.w = bpl[i].tus.w;
if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
break;
xmit_len += bde.tus.f.bdeSize;
if (i == 0)
first_len = xmit_len;
}
genwqe->rsvd2 = num_entry;
genwqe->hba_wqidx = 0;
/* Words 0 - 2 */
wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
wqe->generic.bde.tus.f.bdeSize = first_len;
wqe->generic.bde.addrLow = bpl[0].addrLow;
wqe->generic.bde.addrHigh = bpl[0].addrHigh;
/* Word 3 */
wqe->gen_req.request_payload_len = first_len;
/* Word 4 */
/* Word 5 */
bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
/* Word 6 */
bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
/* Word 7 */
bf_set(wqe_tmo, &wqe->gen_req.wqe_com, (vport->phba->fc_ratov-1));
bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
/* Word 8 */
wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
/* Word 9 */
bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
/* Word 10 */
bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
/* Word 11 */
bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
/* Issue GEN REQ WQE for NPORT <did> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
"6050 Issue GEN REQ WQE to NPORT x%x "
"Data: x%x x%x wq:%p lsreq:%p bmp:%p xmit:%d 1st:%d\n",
ndlp->nlp_DID, genwqe->iotag,
vport->port_state,
genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
genwqe->wqe_cmpl = cmpl;
genwqe->iocb_cmpl = NULL;
genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
genwqe->vport = vport;
genwqe->retry = retry;
lpfc_nvmeio_data(phba, "NVME LS XMIT: xri x%x iotag x%x to x%06x\n",
genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
rc = lpfc_sli4_issue_wqe(phba, LPFC_ELS_RING, genwqe);
if (rc) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
"6045 Issue GEN REQ WQE to NPORT x%x "
"Data: x%x x%x\n",
ndlp->nlp_DID, genwqe->iotag,
vport->port_state);
lpfc_sli_release_iocbq(phba, genwqe);
return 1;
}
return 0;
}
/**
* lpfc_nvme_ls_req - Issue an Link Service request
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
*
* Driver registers this routine to handle any link service request
* from the nvme_fc transport to a remote nvme-aware port.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static int
lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
struct nvme_fc_remote_port *pnvme_rport,
struct nvmefc_ls_req *pnvme_lsreq)
{
int ret = 0;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_rport *rport;
struct lpfc_vport *vport;
struct lpfc_nodelist *ndlp;
struct ulp_bde64 *bpl;
struct lpfc_dmabuf *bmp;
uint16_t ntype, nstate;
/* there are two dma buf in the request, actually there is one and
* the second one is just the start address + cmd size.
* Before calling lpfc_nvme_gen_req these buffers need to be wrapped
* in a lpfc_dmabuf struct. When freeing we just free the wrapper
* because the nvem layer owns the data bufs.
* We do not have to break these packets open, we don't care what is in
* them. And we do not have to look at the resonse data, we only care
* that we got a response. All of the caring is going to happen in the
* nvme-fc layer.
*/
lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
if (unlikely(!lport) || unlikely(!rport))
return -EINVAL;
vport = lport->vport;
if (vport->load_flag & FC_UNLOADING)
return -ENODEV;
/* Need the ndlp. It is stored in the driver's rport. */
ndlp = rport->ndlp;
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
"6051 Remoteport %p, rport has invalid ndlp. "
"Failing LS Req\n", pnvme_rport);
return -ENODEV;
}
/* The remote node has to be a mapped nvme target or an
* unmapped nvme initiator or it's an error.
*/
ntype = ndlp->nlp_type;
nstate = ndlp->nlp_state;
if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
(ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
"6088 DID x%06x not ready for "
"IO. State x%x, Type x%x\n",
pnvme_rport->port_id,
ndlp->nlp_state, ndlp->nlp_type);
return -ENODEV;
}
bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (!bmp) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6044 Could not find node for DID %x\n",
pnvme_rport->port_id);
return 2;
}
INIT_LIST_HEAD(&bmp->list);
bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
if (!bmp->virt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6042 Could not find node for DID %x\n",
pnvme_rport->port_id);
kfree(bmp);
return 3;
}
bpl = (struct ulp_bde64 *)bmp->virt;
bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
bpl->tus.f.bdeFlags = 0;
bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
bpl++;
bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
/* Expand print to include key fields. */
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
"6149 Issue LS Req to DID 0x%06x lport %p, rport %p "
"lsreq%p rqstlen:%d rsplen:%d %pad %pad\n",
ndlp->nlp_DID,
pnvme_lport, pnvme_rport,
pnvme_lsreq, pnvme_lsreq->rqstlen,
pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
&pnvme_lsreq->rspdma);
atomic_inc(&lport->fc4NvmeLsRequests);
/* Hardcode the wait to 30 seconds. Connections are failing otherwise.
* This code allows it all to work.
*/
ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
pnvme_lsreq, lpfc_nvme_cmpl_gen_req,
ndlp, 2, 30, 0);
if (ret != WQE_SUCCESS) {
atomic_inc(&lport->xmt_ls_err);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6052 EXIT. issue ls wqe failed lport %p, "
"rport %p lsreq%p Status %x DID %x\n",
pnvme_lport, pnvme_rport, pnvme_lsreq,
ret, ndlp->nlp_DID);
lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
kfree(bmp);
return ret;
}
/* Stub in routine and return 0 for now. */
return ret;
}
/**
* lpfc_nvme_ls_abort - Issue an Link Service request
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
*
* Driver registers this routine to handle any link service request
* from the nvme_fc transport to a remote nvme-aware port.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static void
lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
struct nvme_fc_remote_port *pnvme_rport,
struct nvmefc_ls_req *pnvme_lsreq)
{
struct lpfc_nvme_lport *lport;
struct lpfc_vport *vport;
struct lpfc_hba *phba;
struct lpfc_nodelist *ndlp;
LIST_HEAD(abort_list);
struct lpfc_sli_ring *pring;
struct lpfc_iocbq *wqe, *next_wqe;
lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
if (unlikely(!lport))
return;
vport = lport->vport;
phba = vport->phba;
if (vport->load_flag & FC_UNLOADING)
return;
ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
if (!ndlp) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6049 Could not find node for DID %x\n",
pnvme_rport->port_id);
return;
}
/* Expand print to include key fields. */
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
"6040 ENTER. lport %p, rport %p lsreq %p rqstlen:%d "
"rsplen:%d %pad %pad\n",
pnvme_lport, pnvme_rport,
pnvme_lsreq, pnvme_lsreq->rqstlen,
pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
&pnvme_lsreq->rspdma);
/*
* Lock the ELS ring txcmplq and build a local list of all ELS IOs
* that need an ABTS. The IOs need to stay on the txcmplq so that
* the abort operation completes them successfully.
*/
pring = phba->sli4_hba.nvmels_wq->pring;
spin_lock_irq(&phba->hbalock);
spin_lock(&pring->ring_lock);
list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
/* Add to abort_list on on NDLP match. */
if (lpfc_check_sli_ndlp(phba, pring, wqe, ndlp)) {
wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
list_add_tail(&wqe->dlist, &abort_list);
}
}
spin_unlock(&pring->ring_lock);
spin_unlock_irq(&phba->hbalock);
/* Abort the targeted IOs and remove them from the abort list. */
list_for_each_entry_safe(wqe, next_wqe, &abort_list, dlist) {
atomic_inc(&lport->xmt_ls_abort);
spin_lock_irq(&phba->hbalock);
list_del_init(&wqe->dlist);
lpfc_sli_issue_abort_iotag(phba, pring, wqe);
spin_unlock_irq(&phba->hbalock);
}
}
/* Fix up the existing sgls for NVME IO. */
static inline void
lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
struct lpfc_nvme_buf *lpfc_ncmd,
struct nvmefc_fcp_req *nCmd)
{
struct lpfc_hba *phba = vport->phba;
struct sli4_sge *sgl;
union lpfc_wqe128 *wqe;
uint32_t *wptr, *dptr;
/*
* Get a local pointer to the built-in wqe and correct
* the cmd size to match NVME's 96 bytes and fix
* the dma address.
*/
wqe = &lpfc_ncmd->cur_iocbq.wqe;
/*
* Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
* match NVME. NVME sends 96 bytes. Also, use the
* nvme commands command and response dma addresses
* rather than the virtual memory to ease the restore
* operation.
*/
sgl = lpfc_ncmd->nvme_sgl;
sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
if (phba->cfg_nvme_embed_cmd) {
sgl->addr_hi = 0;
sgl->addr_lo = 0;
/* Word 0-2 - NVME CMND IU (embedded payload) */
wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
wqe->generic.bde.tus.f.bdeSize = 56;
wqe->generic.bde.addrHigh = 0;
wqe->generic.bde.addrLow = 64; /* Word 16 */
/* Word 10 - dbde is 0, wqes is 1 in template */
/*
* Embed the payload in the last half of the WQE
* WQE words 16-30 get the NVME CMD IU payload
*
* WQE words 16-19 get payload Words 1-4
* WQE words 20-21 get payload Words 6-7
* WQE words 22-29 get payload Words 16-23
*/
wptr = &wqe->words[16]; /* WQE ptr */
dptr = (uint32_t *)nCmd->cmdaddr; /* payload ptr */
dptr++; /* Skip Word 0 in payload */
*wptr++ = *dptr++; /* Word 1 */
*wptr++ = *dptr++; /* Word 2 */
*wptr++ = *dptr++; /* Word 3 */
*wptr++ = *dptr++; /* Word 4 */
dptr++; /* Skip Word 5 in payload */
*wptr++ = *dptr++; /* Word 6 */
*wptr++ = *dptr++; /* Word 7 */
dptr += 8; /* Skip Words 8-15 in payload */
*wptr++ = *dptr++; /* Word 16 */
*wptr++ = *dptr++; /* Word 17 */
*wptr++ = *dptr++; /* Word 18 */
*wptr++ = *dptr++; /* Word 19 */
*wptr++ = *dptr++; /* Word 20 */
*wptr++ = *dptr++; /* Word 21 */
*wptr++ = *dptr++; /* Word 22 */
*wptr = *dptr; /* Word 23 */
} else {
sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma));
sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma));
/* Word 0-2 - NVME CMND IU Inline BDE */
wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen;
wqe->generic.bde.addrHigh = sgl->addr_hi;
wqe->generic.bde.addrLow = sgl->addr_lo;
/* Word 10 */
bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
}
sgl++;
/* Setup the physical region for the FCP RSP */
sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
sgl->word2 = le32_to_cpu(sgl->word2);
if (nCmd->sg_cnt)
bf_set(lpfc_sli4_sge_last, sgl, 0);
else
bf_set(lpfc_sli4_sge_last, sgl, 1);
sgl->word2 = cpu_to_le32(sgl->word2);
sgl->sge_len = cpu_to_le32(nCmd->rsplen);
}
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
static void
lpfc_nvme_ktime(struct lpfc_hba *phba,
struct lpfc_nvme_buf *lpfc_ncmd)
{
uint64_t seg1, seg2, seg3, seg4;
uint64_t segsum;
if (!lpfc_ncmd->ts_last_cmd ||
!lpfc_ncmd->ts_cmd_start ||
!lpfc_ncmd->ts_cmd_wqput ||
!lpfc_ncmd->ts_isr_cmpl ||
!lpfc_ncmd->ts_data_nvme)
return;
if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_cmd_start)
return;
if (lpfc_ncmd->ts_cmd_start < lpfc_ncmd->ts_last_cmd)
return;
if (lpfc_ncmd->ts_cmd_wqput < lpfc_ncmd->ts_cmd_start)
return;
if (lpfc_ncmd->ts_isr_cmpl < lpfc_ncmd->ts_cmd_wqput)
return;
if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_isr_cmpl)
return;
/*
* Segment 1 - Time from Last FCP command cmpl is handed
* off to NVME Layer to start of next command.
* Segment 2 - Time from Driver receives a IO cmd start
* from NVME Layer to WQ put is done on IO cmd.
* Segment 3 - Time from Driver WQ put is done on IO cmd
* to MSI-X ISR for IO cmpl.
* Segment 4 - Time from MSI-X ISR for IO cmpl to when
* cmpl is handled off to the NVME Layer.
*/
seg1 = lpfc_ncmd->ts_cmd_start - lpfc_ncmd->ts_last_cmd;
if (seg1 > 5000000) /* 5 ms - for sequential IOs only */
seg1 = 0;
/* Calculate times relative to start of IO */
seg2 = (lpfc_ncmd->ts_cmd_wqput - lpfc_ncmd->ts_cmd_start);
segsum = seg2;
seg3 = lpfc_ncmd->ts_isr_cmpl - lpfc_ncmd->ts_cmd_start;
if (segsum > seg3)
return;
seg3 -= segsum;
segsum += seg3;
seg4 = lpfc_ncmd->ts_data_nvme - lpfc_ncmd->ts_cmd_start;
if (segsum > seg4)
return;
seg4 -= segsum;
phba->ktime_data_samples++;
phba->ktime_seg1_total += seg1;
if (seg1 < phba->ktime_seg1_min)
phba->ktime_seg1_min = seg1;
else if (seg1 > phba->ktime_seg1_max)
phba->ktime_seg1_max = seg1;
phba->ktime_seg2_total += seg2;
if (seg2 < phba->ktime_seg2_min)
phba->ktime_seg2_min = seg2;
else if (seg2 > phba->ktime_seg2_max)
phba->ktime_seg2_max = seg2;
phba->ktime_seg3_total += seg3;
if (seg3 < phba->ktime_seg3_min)
phba->ktime_seg3_min = seg3;
else if (seg3 > phba->ktime_seg3_max)
phba->ktime_seg3_max = seg3;
phba->ktime_seg4_total += seg4;
if (seg4 < phba->ktime_seg4_min)
phba->ktime_seg4_min = seg4;
else if (seg4 > phba->ktime_seg4_max)
phba->ktime_seg4_max = seg4;
lpfc_ncmd->ts_last_cmd = 0;
lpfc_ncmd->ts_cmd_start = 0;
lpfc_ncmd->ts_cmd_wqput = 0;
lpfc_ncmd->ts_isr_cmpl = 0;
lpfc_ncmd->ts_data_nvme = 0;
}
#endif
/**
* lpfc_nvme_io_cmd_wqe_cmpl - Complete an NVME-over-FCP IO
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
*
* Driver registers this routine as it io request handler. This
* routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
* data structure to the rport indicated in @lpfc_nvme_rport.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static void
lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
struct lpfc_wcqe_complete *wcqe)
{
struct lpfc_nvme_buf *lpfc_ncmd =
(struct lpfc_nvme_buf *)pwqeIn->context1;
struct lpfc_vport *vport = pwqeIn->vport;
struct nvmefc_fcp_req *nCmd;
struct nvme_fc_ersp_iu *ep;
struct nvme_fc_cmd_iu *cp;
struct lpfc_nvme_rport *rport;
struct lpfc_nodelist *ndlp;
struct lpfc_nvme_fcpreq_priv *freqpriv;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_ctrl_stat *cstat;
unsigned long flags;
uint32_t code, status, idx;
uint16_t cid, sqhd, data;
uint32_t *ptr;
/* Sanity check on return of outstanding command */
if (!lpfc_ncmd || !lpfc_ncmd->nvmeCmd || !lpfc_ncmd->nrport) {
if (!lpfc_ncmd) {
lpfc_printf_vlog(vport, KERN_ERR,
LOG_NODE | LOG_NVME_IOERR,
"6071 Null lpfc_ncmd pointer. No "
"release, skip completion\n");
return;
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
"6066 Missing cmpl ptrs: lpfc_ncmd %p, "
"nvmeCmd %p nrport %p\n",
lpfc_ncmd, lpfc_ncmd->nvmeCmd,
lpfc_ncmd->nrport);
/* Release the lpfc_ncmd regardless of the missing elements. */
lpfc_release_nvme_buf(phba, lpfc_ncmd);
return;
}
nCmd = lpfc_ncmd->nvmeCmd;
rport = lpfc_ncmd->nrport;
status = bf_get(lpfc_wcqe_c_status, wcqe);
if (vport->localport) {
lport = (struct lpfc_nvme_lport *)vport->localport->private;
if (lport) {
idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
cstat = &lport->cstat[idx];
atomic_inc(&cstat->fc4NvmeIoCmpls);
if (status) {
if (bf_get(lpfc_wcqe_c_xb, wcqe))
atomic_inc(&lport->cmpl_fcp_xb);
atomic_inc(&lport->cmpl_fcp_err);
}
}
}
lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
lpfc_ncmd->cur_iocbq.sli4_xritag,
status, wcqe->parameter);
/*
* Catch race where our node has transitioned, but the
* transport is still transitioning.
*/
ndlp = rport->ndlp;
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
"6061 rport %p, DID x%06x node not ready.\n",
rport, rport->remoteport->port_id);
ndlp = lpfc_findnode_did(vport, rport->remoteport->port_id);
if (!ndlp) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
"6062 Ignoring NVME cmpl. No ndlp\n");
goto out_err;
}
}
code = bf_get(lpfc_wcqe_c_code, wcqe);
if (code == CQE_CODE_NVME_ERSP) {
/* For this type of CQE, we need to rebuild the rsp */
ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
/*
* Get Command Id from cmd to plug into response. This
* code is not needed in the next NVME Transport drop.
*/
cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
cid = cp->sqe.common.command_id;
/*
* RSN is in CQE word 2
* SQHD is in CQE Word 3 bits 15:0
* Cmd Specific info is in CQE Word 1
* and in CQE Word 0 bits 15:0
*/
sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
/* Now lets build the NVME ERSP IU */
ep->iu_len = cpu_to_be16(8);
ep->rsn = wcqe->parameter;
ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
ep->rsvd12 = 0;
ptr = (uint32_t *)&ep->cqe.result.u64;
*ptr++ = wcqe->total_data_placed;
data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
*ptr = (uint32_t)data;
ep->cqe.sq_head = sqhd;
ep->cqe.sq_id = nCmd->sqid;
ep->cqe.command_id = cid;
ep->cqe.status = 0;
lpfc_ncmd->status = IOSTAT_SUCCESS;
lpfc_ncmd->result = 0;
nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
nCmd->transferred_length = nCmd->payload_length;
} else {
lpfc_ncmd->status = (status & LPFC_IOCB_STATUS_MASK);
lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
/* For NVME, the only failure path that results in an
* IO error is when the adapter rejects it. All other
* conditions are a success case and resolved by the
* transport.
* IOSTAT_FCP_RSP_ERROR means:
* 1. Length of data received doesn't match total
* transfer length in WQE
* 2. If the RSP payload does NOT match these cases:
* a. RSP length 12/24 bytes and all zeros
* b. NVME ERSP
*/
switch (lpfc_ncmd->status) {
case IOSTAT_SUCCESS:
nCmd->transferred_length = wcqe->total_data_placed;
nCmd->rcv_rsplen = 0;
nCmd->status = 0;
break;
case IOSTAT_FCP_RSP_ERROR:
nCmd->transferred_length = wcqe->total_data_placed;
nCmd->rcv_rsplen = wcqe->parameter;
nCmd->status = 0;
/* Sanity check */
if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN)
break;
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
"6081 NVME Completion Protocol Error: "
"xri %x status x%x result x%x "
"placed x%x\n",
lpfc_ncmd->cur_iocbq.sli4_xritag,
lpfc_ncmd->status, lpfc_ncmd->result,
wcqe->total_data_placed);
break;
case IOSTAT_LOCAL_REJECT:
/* Let fall through to set command final state. */
if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
lpfc_printf_vlog(vport, KERN_INFO,
LOG_NVME_IOERR,
"6032 Delay Aborted cmd %p "
"nvme cmd %p, xri x%x, "
"xb %d\n",
lpfc_ncmd, nCmd,
lpfc_ncmd->cur_iocbq.sli4_xritag,
bf_get(lpfc_wcqe_c_xb, wcqe));
default:
out_err:
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6072 NVME Completion Error: xri %x "
"status x%x result x%x placed x%x\n",
lpfc_ncmd->cur_iocbq.sli4_xritag,
lpfc_ncmd->status, lpfc_ncmd->result,
wcqe->total_data_placed);
nCmd->transferred_length = 0;
nCmd->rcv_rsplen = 0;
nCmd->status = NVME_SC_INTERNAL;
}
}
/* pick up SLI4 exhange busy condition */
if (bf_get(lpfc_wcqe_c_xb, wcqe))
lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
else
lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
if (ndlp && NLP_CHK_NODE_ACT(ndlp))
atomic_dec(&ndlp->cmd_pending);
/* Update stats and complete the IO. There is
* no need for dma unprep because the nvme_transport
* owns the dma address.
*/
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
if (lpfc_ncmd->ts_cmd_start) {
lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
lpfc_ncmd->ts_data_nvme = ktime_get_ns();
phba->ktime_last_cmd = lpfc_ncmd->ts_data_nvme;
lpfc_nvme_ktime(phba, lpfc_ncmd);
}
if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
if (lpfc_ncmd->cpu != smp_processor_id())
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
"6701 CPU Check cmpl: "
"cpu %d expect %d\n",
smp_processor_id(), lpfc_ncmd->cpu);
if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
phba->cpucheck_cmpl_io[lpfc_ncmd->cpu]++;
}
#endif
/* NVME targets need completion held off until the abort exchange
* completes unless the NVME Rport is getting unregistered.
*/
if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
freqpriv = nCmd->private;
freqpriv->nvme_buf = NULL;
nCmd->done(nCmd);
lpfc_ncmd->nvmeCmd = NULL;
}
spin_lock_irqsave(&phba->hbalock, flags);
lpfc_ncmd->nrport = NULL;
spin_unlock_irqrestore(&phba->hbalock, flags);
/* Call release with XB=1 to queue the IO into the abort list. */
lpfc_release_nvme_buf(phba, lpfc_ncmd);
}
/**
* lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
* @lpfc_nvme_fcreq: IO request from nvme fc to driver.
* @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
*
* Driver registers this routine as it io request handler. This
* routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
* data structure to the rport indicated in @lpfc_nvme_rport.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static int
lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
struct lpfc_nvme_buf *lpfc_ncmd,
struct lpfc_nodelist *pnode,
struct lpfc_nvme_ctrl_stat *cstat)
{
struct lpfc_hba *phba = vport->phba;
struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
struct lpfc_iocbq *pwqeq = &(lpfc_ncmd->cur_iocbq);
union lpfc_wqe128 *wqe = &pwqeq->wqe;
uint32_t req_len;
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return -EINVAL;
/*
* There are three possibilities here - use scatter-gather segment, use
* the single mapping, or neither.
*/
if (nCmd->sg_cnt) {
if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
/* From the iwrite template, initialize words 7 - 11 */
memcpy(&wqe->words[7],
&lpfc_iwrite_cmd_template.words[7],
sizeof(uint32_t) * 5);
/* Word 4 */
wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length;
/* Word 5 */
if ((phba->cfg_nvme_enable_fb) &&
(pnode->nlp_flag & NLP_FIRSTBURST)) {
req_len = lpfc_ncmd->nvmeCmd->payload_length;
if (req_len < pnode->nvme_fb_size)
wqe->fcp_iwrite.initial_xfer_len =
req_len;
else
wqe->fcp_iwrite.initial_xfer_len =
pnode->nvme_fb_size;
} else {
wqe->fcp_iwrite.initial_xfer_len = 0;
}
atomic_inc(&cstat->fc4NvmeOutputRequests);
} else {
/* From the iread template, initialize words 7 - 11 */
memcpy(&wqe->words[7],
&lpfc_iread_cmd_template.words[7],
sizeof(uint32_t) * 5);
/* Word 4 */
wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
/* Word 5 */
wqe->fcp_iread.rsrvd5 = 0;
atomic_inc(&cstat->fc4NvmeInputRequests);
}
} else {
/* From the icmnd template, initialize words 4 - 11 */
memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
sizeof(uint32_t) * 8);
atomic_inc(&cstat->fc4NvmeControlRequests);
}
/*
* Finish initializing those WQE fields that are independent
* of the nvme_cmnd request_buffer
*/
/* Word 3 */
bf_set(payload_offset_len, &wqe->fcp_icmd,
(nCmd->rsplen + nCmd->cmdlen));
/* Word 6 */
bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
/* Word 8 */
wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
/* Word 9 */
bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
pwqeq->vport = vport;
return 0;
}
/**
* lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
* @lpfc_nvme_fcreq: IO request from nvme fc to driver.
* @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
*
* Driver registers this routine as it io request handler. This
* routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
* data structure to the rport indicated in @lpfc_nvme_rport.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static int
lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
struct lpfc_nvme_buf *lpfc_ncmd)
{
struct lpfc_hba *phba = vport->phba;
struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe;
struct sli4_sge *sgl = lpfc_ncmd->nvme_sgl;
struct scatterlist *data_sg;
struct sli4_sge *first_data_sgl;
struct ulp_bde64 *bde;
dma_addr_t physaddr;
uint32_t num_bde = 0;
uint32_t dma_len;
uint32_t dma_offset = 0;
int nseg, i;
/* Fix up the command and response DMA stuff. */
lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
/*
* There are three possibilities here - use scatter-gather segment, use
* the single mapping, or neither.
*/
if (nCmd->sg_cnt) {
/*
* Jump over the cmd and rsp SGEs. The fix routine
* has already adjusted for this.
*/
sgl += 2;
first_data_sgl = sgl;
lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6058 Too many sg segments from "
"NVME Transport. Max %d, "
"nvmeIO sg_cnt %d\n",
phba->cfg_nvme_seg_cnt + 1,
lpfc_ncmd->seg_cnt);
lpfc_ncmd->seg_cnt = 0;
return 1;
}
/*
* The driver established a maximum scatter-gather segment count
* during probe that limits the number of sg elements in any
* single nvme command. Just run through the seg_cnt and format
* the sge's.
*/
nseg = nCmd->sg_cnt;
data_sg = nCmd->first_sgl;
for (i = 0; i < nseg; i++) {
if (data_sg == NULL) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6059 dptr err %d, nseg %d\n",
i, nseg);
lpfc_ncmd->seg_cnt = 0;
return 1;
}
physaddr = data_sg->dma_address;
dma_len = data_sg->length;
sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
sgl->word2 = le32_to_cpu(sgl->word2);
if ((num_bde + 1) == nseg)
bf_set(lpfc_sli4_sge_last, sgl, 1);
else
bf_set(lpfc_sli4_sge_last, sgl, 0);
bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
sgl->word2 = cpu_to_le32(sgl->word2);
sgl->sge_len = cpu_to_le32(dma_len);
dma_offset += dma_len;
data_sg = sg_next(data_sg);
sgl++;
}
if (phba->nvme_embed_pbde) {
/* Use PBDE support for first SGL only, offset == 0 */
/* Words 13-15 */
bde = (struct ulp_bde64 *)
&wqe->words[13];
bde->addrLow = first_data_sgl->addr_lo;
bde->addrHigh = first_data_sgl->addr_hi;
bde->tus.f.bdeSize =
le32_to_cpu(first_data_sgl->sge_len);
bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bde->tus.w = cpu_to_le32(bde->tus.w);
/* wqe_pbde is 1 in template */
} else {
memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
bf_set(wqe_pbde, &wqe->generic.wqe_com, 0);
}
} else {
bf_set(wqe_pbde, &wqe->generic.wqe_com, 0);
memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
/* For this clause to be valid, the payload_length
* and sg_cnt must zero.
*/
if (nCmd->payload_length != 0) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6063 NVME DMA Prep Err: sg_cnt %d "
"payload_length x%x\n",
nCmd->sg_cnt, nCmd->payload_length);
return 1;
}
}
return 0;
}
/**
* lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
* @lpfc_nvme_fcreq: IO request from nvme fc to driver.
* @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
*
* Driver registers this routine as it io request handler. This
* routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
* data structure to the rport
indicated in @lpfc_nvme_rport.
*
* Return value :
* 0 - Success
* TODO: What are the failure codes.
**/
static int
lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
struct nvme_fc_remote_port *pnvme_rport,
void *hw_queue_handle,
struct nvmefc_fcp_req *pnvme_fcreq)
{
int ret = 0;
int expedite = 0;
int idx;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_ctrl_stat *cstat;
struct lpfc_vport *vport;
struct lpfc_hba *phba;
struct lpfc_nodelist *ndlp;
struct lpfc_nvme_buf *lpfc_ncmd;
struct lpfc_nvme_rport *rport;
struct lpfc_nvme_qhandle *lpfc_queue_info;
struct lpfc_nvme_fcpreq_priv *freqpriv;
struct nvme_common_command *sqe;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
uint64_t start = 0;
#endif
/* Validate pointers. LLDD fault handling with transport does
* have timing races.
*/
lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
if (unlikely(!lport)) {
ret = -EINVAL;
goto out_fail;
}
vport = lport->vport;
if (unlikely(!hw_queue_handle)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6117 Fail IO, NULL hw_queue_handle\n");
atomic_inc(&lport->xmt_fcp_err);
ret = -EBUSY;
goto out_fail;
}
phba = vport->phba;
if (vport->load_flag & FC_UNLOADING) {
ret = -ENODEV;
goto out_fail;
}
if (vport->load_flag & FC_UNLOADING) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6124 Fail IO, Driver unload\n");
atomic_inc(&lport->xmt_fcp_err);
ret = -ENODEV;
goto out_fail;
}
freqpriv = pnvme_fcreq->private;
if (unlikely(!freqpriv)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6158 Fail IO, NULL request data\n");
atomic_inc(&lport->xmt_fcp_err);
ret = -EINVAL;
goto out_fail;
}
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
if (phba->ktime_on)
start = ktime_get_ns();
#endif
rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
/*
* Catch race where our node has transitioned, but the
* transport is still transitioning.
*/
ndlp = rport->ndlp;
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
"6053 Fail IO, ndlp not ready: rport %p "
"ndlp %p, DID x%06x\n",
rport, ndlp, pnvme_rport->port_id);
atomic_inc(&lport->xmt_fcp_err);
ret = -EBUSY;
goto out_fail;
}
/* The remote node has to be a mapped target or it's an error. */
if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
(ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
"6036 Fail IO, DID x%06x not ready for "
"IO. State x%x, Type x%x Flg x%x\n",
pnvme_rport->port_id,
ndlp->nlp_state, ndlp->nlp_type,
ndlp->upcall_flags);
atomic_inc(&lport->xmt_fcp_bad_ndlp);
ret = -EBUSY;
goto out_fail;
}
/* Currently only NVME Keep alive commands should be expedited
* if the driver runs out of a resource. These should only be
* issued on the admin queue, qidx 0
*/
if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) {
sqe = &((struct nvme_fc_cmd_iu *)
pnvme_fcreq->cmdaddr)->sqe.common;
if (sqe->opcode == nvme_admin_keep_alive)
expedite = 1;
}
/* The node is shared with FCP IO, make sure the IO pending count does
* not exceed the programmed depth.
*/
if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) &&
!expedite) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6174 Fail IO, ndlp qdepth exceeded: "
"idx %d DID %x pend %d qdepth %d\n",
lpfc_queue_info->index, ndlp->nlp_DID,
atomic_read(&ndlp->cmd_pending),
ndlp->cmd_qdepth);
atomic_inc(&lport->xmt_fcp_qdepth);
ret = -EBUSY;
goto out_fail;
}
lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, expedite);
if (lpfc_ncmd == NULL) {
atomic_inc(&lport->xmt_fcp_noxri);
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6065 Fail IO, driver buffer pool is empty: "
"idx %d DID %x\n",
lpfc_queue_info->index, ndlp->nlp_DID);
ret = -EBUSY;
goto out_fail;
}
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
if (start) {
lpfc_ncmd->ts_cmd_start = start;
lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
} else {
lpfc_ncmd->ts_cmd_start = 0;
}
#endif
/*
* Store the data needed by the driver to issue, abort, and complete
* an IO.
* Do not let the IO hang out forever. There is no midlayer issuing
* an abort so inform the FW of the maximum IO pending time.
*/
freqpriv->nvme_buf = lpfc_ncmd;
lpfc_ncmd->nvmeCmd = pnvme_fcreq;
lpfc_ncmd->nrport = rport;
lpfc_ncmd->ndlp = ndlp;
lpfc_ncmd->start_time = jiffies;
/*
* Issue the IO on the WQ indicated by index in the hw_queue_handle.
* This identfier was create in our hardware queue create callback
* routine. The driver now is dependent on the IO queue steering from
* the transport. We are trusting the upper NVME layers know which
* index to use and that they have affinitized a CPU to this hardware
* queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
*/
idx = lpfc_queue_info->index;
lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
cstat = &lport->cstat[idx];
lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat);
ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
if (ret) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6175 Fail IO, Prep DMA: "
"idx %d DID %x\n",
lpfc_queue_info->index, ndlp->nlp_DID);
atomic_inc(&lport->xmt_fcp_err);
ret = -ENOMEM;
goto out_free_nvme_buf;
}
atomic_inc(&ndlp->cmd_pending);
lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
lpfc_ncmd->cur_iocbq.sli4_xritag,
lpfc_queue_info->index, ndlp->nlp_DID);
ret = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, &lpfc_ncmd->cur_iocbq);
if (ret) {
atomic_inc(&lport->xmt_fcp_wqerr);
atomic_dec(&ndlp->cmd_pending);
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6113 Fail IO, Could not issue WQE err %x "
"sid: x%x did: x%x oxid: x%x\n",
ret, vport->fc_myDID, ndlp->nlp_DID,
lpfc_ncmd->cur_iocbq.sli4_xritag);
goto out_free_nvme_buf;
}
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
if (lpfc_ncmd->ts_cmd_start)
lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
lpfc_ncmd->cpu = smp_processor_id();
if (lpfc_ncmd->cpu != lpfc_queue_info->index) {
/* Check for admin queue */
if (lpfc_queue_info->qidx) {
lpfc_printf_vlog(vport,
KERN_ERR, LOG_NVME_IOERR,
"6702 CPU Check cmd: "
"cpu %d wq %d\n",
lpfc_ncmd->cpu,
lpfc_queue_info->index);
}
lpfc_ncmd->cpu = lpfc_queue_info->index;
}
if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
phba->cpucheck_xmt_io[lpfc_ncmd->cpu]++;
}
#endif
return 0;
out_free_nvme_buf:
if (lpfc_ncmd->nvmeCmd->sg_cnt) {
if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
atomic_dec(&cstat->fc4NvmeOutputRequests);
else
atomic_dec(&cstat->fc4NvmeInputRequests);
} else
atomic_dec(&cstat->fc4NvmeControlRequests);
lpfc_release_nvme_buf(phba, lpfc_ncmd);
out_fail:
return ret;
}
/**
* lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
* @phba: Pointer to HBA context object
* @cmdiocb: Pointer to command iocb object.
* @rspiocb: Pointer to response iocb object.
*
* This is the callback function for any NVME FCP IO that was aborted.
*
* Return value:
* None
**/
void
lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
struct lpfc_wcqe_complete *abts_cmpl)
{
lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
"6145 ABORT_XRI_CN completing on rpi x%x "
"original iotag x%x, abort cmd iotag x%x "
"req_tag x%x, status x%x, hwstatus x%x\n",
cmdiocb->iocb.un.acxri.abortContextTag,
cmdiocb->iocb.un.acxri.abortIoTag,
cmdiocb->iotag,
bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
bf_get(lpfc_wcqe_c_status, abts_cmpl),
bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
lpfc_sli_release_iocbq(phba, cmdiocb);
}
/**
* lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
* @lpfc_pnvme: Pointer to the driver's nvme instance data
* @lpfc_nvme_lport: Pointer to the driver's local port data
* @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
* @lpfc_nvme_fcreq: IO request from nvme fc to driver.
* @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
*
* Driver registers this routine as its nvme request io abort handler. This
* routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
* data structure to the rport indicated in @lpfc_nvme_rport. This routine
* is executed asynchronously - one the target is validated as "MAPPED" and
* ready for IO, the driver issues the abort request and returns.
*
* Return value:
* None
**/
static void
lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
struct nvme_fc_remote_port *pnvme_rport,
void *hw_queue_handle,
struct nvmefc_fcp_req *pnvme_fcreq)
{
struct lpfc_nvme_lport *lport;
struct lpfc_vport *vport;
struct lpfc_hba *phba;
struct lpfc_nvme_buf *lpfc_nbuf;
struct lpfc_iocbq *abts_buf;
struct lpfc_iocbq *nvmereq_wqe;
struct lpfc_nvme_fcpreq_priv *freqpriv;
union lpfc_wqe128 *abts_wqe;
unsigned long flags;
int ret_val;
/* Validate pointers. LLDD fault handling with transport does
* have timing races.
*/
lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
if (unlikely(!lport))
return;
vport = lport->vport;
if (unlikely(!hw_queue_handle)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
"6129 Fail Abort, HW Queue Handle NULL.\n");
return;
}
phba = vport->phba;
freqpriv = pnvme_fcreq->private;
if (unlikely(!freqpriv))
return;
if (vport->load_flag & FC_UNLOADING)
return;
/* Announce entry to new IO submit field. */
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
"6002 Abort Request to rport DID x%06x "
"for nvme_fc_req %p\n",
pnvme_rport->port_id,
pnvme_fcreq);
/* If the hba is getting reset, this flag is set. It is
* cleared when the reset is complete and rings reestablished.
*/
spin_lock_irqsave(&phba->hbalock, flags);
/* driver queued commands are in process of being flushed */
if (phba->hba_flag & HBA_NVME_IOQ_FLUSH) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6139 Driver in reset cleanup - flushing "
"NVME Req now. hba_flag x%x\n",
phba->hba_flag);
return;
}
lpfc_nbuf = freqpriv->nvme_buf;
if (!lpfc_nbuf) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6140 NVME IO req has no matching lpfc nvme "
"io buffer. Skipping abort req.\n");
return;
} else if (!lpfc_nbuf->nvmeCmd) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6141 lpfc NVME IO req has no nvme_fcreq "
"io buffer. Skipping abort req.\n");
return;
}
nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
/*
* The lpfc_nbuf and the mapped nvme_fcreq in the driver's
* state must match the nvme_fcreq passed by the nvme
* transport. If they don't match, it is likely the driver
* has already completed the NVME IO and the nvme transport
* has not seen it yet.
*/
if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6143 NVME req mismatch: "
"lpfc_nbuf %p nvmeCmd %p, "
"pnvme_fcreq %p. Skipping Abort xri x%x\n",
lpfc_nbuf, lpfc_nbuf->nvmeCmd,
pnvme_fcreq, nvmereq_wqe->sli4_xritag);
return;
}
/* Don't abort IOs no longer on the pending queue. */
if (!(nvmereq_wqe->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6142 NVME IO req %p not queued - skipping "
"abort req xri x%x\n",
pnvme_fcreq, nvmereq_wqe->sli4_xritag);
return;
}
atomic_inc(&lport->xmt_fcp_abort);
lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
nvmereq_wqe->sli4_xritag,
nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
/* Outstanding abort is in progress */
if (nvmereq_wqe->iocb_flag & LPFC_DRIVER_ABORTED) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6144 Outstanding NVME I/O Abort Request "
"still pending on nvme_fcreq %p, "
"lpfc_ncmd %p xri x%x\n",
pnvme_fcreq, lpfc_nbuf,
nvmereq_wqe->sli4_xritag);
return;
}
abts_buf = __lpfc_sli_get_iocbq(phba);
if (!abts_buf) {
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6136 No available abort wqes. Skipping "
"Abts req for nvme_fcreq %p xri x%x\n",
pnvme_fcreq, nvmereq_wqe->sli4_xritag);
return;
}
/* Ready - mark outstanding as aborted by driver. */
nvmereq_wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
/* Complete prepping the abort wqe and issue to the FW. */
abts_wqe = &abts_buf->wqe;
/* WQEs are reused. Clear stale data and set key fields to
* zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
*/
memset(abts_wqe, 0, sizeof(union lpfc_wqe));
bf_set(abort_cmd_criteria, &abts_wqe->abort_cmd, T_XRI_TAG);
/* word 7 */
bf_set(wqe_ct, &abts_wqe->abort_cmd.wqe_com, 0);
bf_set(wqe_cmnd, &abts_wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
bf_set(wqe_class, &abts_wqe->abort_cmd.wqe_com,
nvmereq_wqe->iocb.ulpClass);
/* word 8 - tell the FW to abort the IO associated with this
* outstanding exchange ID.
*/
abts_wqe->abort_cmd.wqe_com.abort_tag = nvmereq_wqe->sli4_xritag;
/* word 9 - this is the iotag for the abts_wqe completion. */
bf_set(wqe_reqtag, &abts_wqe->abort_cmd.wqe_com,
abts_buf->iotag);
/* word 10 */
bf_set(wqe_wqid, &abts_wqe->abort_cmd.wqe_com, nvmereq_wqe->hba_wqidx);
bf_set(wqe_qosd, &abts_wqe->abort_cmd.wqe_com, 1);
bf_set(wqe_lenloc, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
/* word 11 */
bf_set(wqe_cmd_type, &abts_wqe->abort_cmd.wqe_com, OTHER_COMMAND);
bf_set(wqe_wqec, &abts_wqe->abort_cmd.wqe_com, 1);
bf_set(wqe_cqid, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
/* ABTS WQE must go to the same WQ as the WQE to be aborted */
abts_buf->iocb_flag |= LPFC_IO_NVME;
abts_buf->hba_wqidx = nvmereq_wqe->hba_wqidx;
abts_buf->vport = vport;
abts_buf->wqe_cmpl = lpfc_nvme_abort_fcreq_cmpl;
ret_val = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, abts_buf);
spin_unlock_irqrestore(&phba->hbalock, flags);
if (ret_val) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
"6137 Failed abts issue_wqe with status x%x "
"for nvme_fcreq %p.\n",
ret_val, pnvme_fcreq);
lpfc_sli_release_iocbq(phba, abts_buf);
return;
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
"6138 Transport Abort NVME Request Issued for "
"ox_id x%x on reqtag x%x\n",
nvmereq_wqe->sli4_xritag,
abts_buf->iotag);
}
/* Declare and initialization an instance of the FC NVME template. */
static struct nvme_fc_port_template lpfc_nvme_template = {
/* initiator-based functions */
.localport_delete = lpfc_nvme_localport_delete,
.remoteport_delete = lpfc_nvme_remoteport_delete,
.create_queue = lpfc_nvme_create_queue,
.delete_queue = lpfc_nvme_delete_queue,
.ls_req = lpfc_nvme_ls_req,
.fcp_io = lpfc_nvme_fcp_io_submit,
.ls_abort = lpfc_nvme_ls_abort,
.fcp_abort = lpfc_nvme_fcp_abort,
.max_hw_queues = 1,
.max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
.max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
.dma_boundary = 0xFFFFFFFF,
/* Sizes of additional private data for data structures.
* No use for the last two sizes at this time.
*/
.local_priv_sz = sizeof(struct lpfc_nvme_lport),
.remote_priv_sz = sizeof(struct lpfc_nvme_rport),
.lsrqst_priv_sz = 0,
.fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
};
/**
* lpfc_sli4_post_nvme_sgl_block - post a block of nvme sgl list to firmware
* @phba: pointer to lpfc hba data structure.
* @nblist: pointer to nvme buffer list.
* @count: number of scsi buffers on the list.
*
* This routine is invoked to post a block of @count scsi sgl pages from a
* SCSI buffer list @nblist to the HBA using non-embedded mailbox command.
* No Lock is held.
*
**/
static int
lpfc_sli4_post_nvme_sgl_block(struct lpfc_hba *phba,
struct list_head *nblist,
int count)
{
struct lpfc_nvme_buf *lpfc_ncmd;
struct lpfc_mbx_post_uembed_sgl_page1 *sgl;
struct sgl_page_pairs *sgl_pg_pairs;
void *viraddr;
LPFC_MBOXQ_t *mbox;
uint32_t reqlen, alloclen, pg_pairs;
uint32_t mbox_tmo;
uint16_t xritag_start = 0;
int rc = 0;
uint32_t shdr_status, shdr_add_status;
dma_addr_t pdma_phys_bpl1;
union lpfc_sli4_cfg_shdr *shdr;
/* Calculate the requested length of the dma memory */
reqlen = count * sizeof(struct sgl_page_pairs) +
sizeof(union lpfc_sli4_cfg_shdr) + sizeof(uint32_t);
if (reqlen > SLI4_PAGE_SIZE) {
lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
"6118 Block sgl registration required DMA "
"size (%d) great than a page\n", reqlen);
return -ENOMEM;
}
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mbox) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"6119 Failed to allocate mbox cmd memory\n");
return -ENOMEM;
}
/* Allocate DMA memory and set up the non-embedded mailbox command */
alloclen = lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES, reqlen,
LPFC_SLI4_MBX_NEMBED);
if (alloclen < reqlen) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"6120 Allocated DMA memory size (%d) is "
"less than the requested DMA memory "
"size (%d)\n", alloclen, reqlen);
lpfc_sli4_mbox_cmd_free(phba, mbox);
return -ENOMEM;
}
/* Get the first SGE entry from the non-embedded DMA memory */
viraddr = mbox->sge_array->addr[0];
/* Set up the SGL pages in the non-embedded DMA pages */
sgl = (struct lpfc_mbx_post_uembed_sgl_page1 *)viraddr;
sgl_pg_pairs = &sgl->sgl_pg_pairs;
pg_pairs = 0;
list_for_each_entry(lpfc_ncmd, nblist, list) {
/* Set up the sge entry */
sgl_pg_pairs->sgl_pg0_addr_lo =
cpu_to_le32(putPaddrLow(lpfc_ncmd->dma_phys_sgl));
sgl_pg_pairs->sgl_pg0_addr_hi =
cpu_to_le32(putPaddrHigh(lpfc_ncmd->dma_phys_sgl));
if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
pdma_phys_bpl1 = lpfc_ncmd->dma_phys_sgl +
SGL_PAGE_SIZE;
else
pdma_phys_bpl1 = 0;
sgl_pg_pairs->sgl_pg1_addr_lo =
cpu_to_le32(putPaddrLow(pdma_phys_bpl1));
sgl_pg_pairs->sgl_pg1_addr_hi =
cpu_to_le32(putPaddrHigh(pdma_phys_bpl1));
/* Keep the first xritag on the list */
if (pg_pairs == 0)
xritag_start = lpfc_ncmd->cur_iocbq.sli4_xritag;
sgl_pg_pairs++;
pg_pairs++;
}
bf_set(lpfc_post_sgl_pages_xri, sgl, xritag_start);
bf_set(lpfc_post_sgl_pages_xricnt, sgl, pg_pairs);
/* Perform endian conversion if necessary */
sgl->word0 = cpu_to_le32(sgl->word0);
if (!phba->sli4_hba.intr_enable)
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
else {
mbox_tmo = lpfc_mbox_tmo_val(phba, mbox);
rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
}
shdr = (union lpfc_sli4_cfg_shdr *)&sgl->cfg_shdr;
shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
if (rc != MBX_TIMEOUT)
lpfc_sli4_mbox_cmd_free(phba, mbox);
if (shdr_status || shdr_add_status || rc) {
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"6125 POST_SGL_BLOCK mailbox command failed "
"status x%x add_status x%x mbx status x%x\n",
shdr_status, shdr_add_status, rc);
rc = -ENXIO;
}
return rc;
}
/**
* lpfc_post_nvme_sgl_list - Post blocks of nvme buffer sgls from a list
* @phba: pointer to lpfc hba data structure.
* @post_nblist: pointer to the nvme buffer list.
*
* This routine walks a list of nvme buffers that was passed in. It attempts
* to construct blocks of nvme buffer sgls which contains contiguous xris and
* uses the non-embedded SGL block post mailbox commands to post to the port.
* For single NVME buffer sgl with non-contiguous xri, if any, it shall use
* embedded SGL post mailbox command for posting. The @post_nblist passed in
* must be local list, thus no lock is needed when manipulate the list.
*
* Returns: 0 = failure, non-zero number of successfully posted buffers.
**/
static int
lpfc_post_nvme_sgl_list(struct lpfc_hba *phba,
struct list_head *post_nblist, int sb_count)
{
struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
int status, sgl_size;
int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
dma_addr_t pdma_phys_sgl1;
int last_xritag = NO_XRI;
int cur_xritag;
LIST_HEAD(prep_nblist);
LIST_HEAD(blck_nblist);
LIST_HEAD(nvme_nblist);
/* sanity check */
if (sb_count <= 0)
return -EINVAL;
sgl_size = phba->cfg_sg_dma_buf_size;
list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next, post_nblist, list) {
list_del_init(&lpfc_ncmd->list);
block_cnt++;
if ((last_xritag != NO_XRI) &&
(lpfc_ncmd->cur_iocbq.sli4_xritag != last_xritag + 1)) {
/* a hole in xri block, form a sgl posting block */
list_splice_init(&prep_nblist, &blck_nblist);
post_cnt = block_cnt - 1;
/* prepare list for next posting block */
list_add_tail(&lpfc_ncmd->list, &prep_nblist);
block_cnt = 1;
} else {
/* prepare list for next posting block */
list_add_tail(&lpfc_ncmd->list, &prep_nblist);
/* enough sgls for non-embed sgl mbox command */
if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
list_splice_init(&prep_nblist, &blck_nblist);
post_cnt = block_cnt;
block_cnt = 0;
}
}
num_posting++;
last_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
/* end of repost sgl list condition for NVME buffers */
if (num_posting == sb_count) {
if (post_cnt == 0) {
/* last sgl posting block */
list_splice_init(&prep_nblist, &blck_nblist);
post_cnt = block_cnt;
} else if (block_cnt == 1) {
/* last single sgl with non-contiguous xri */
if (sgl_size > SGL_PAGE_SIZE)
pdma_phys_sgl1 =
lpfc_ncmd->dma_phys_sgl +
SGL_PAGE_SIZE;
else
pdma_phys_sgl1 = 0;
cur_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
status = lpfc_sli4_post_sgl(phba,
lpfc_ncmd->dma_phys_sgl,
pdma_phys_sgl1, cur_xritag);
if (status) {
/* failure, put on abort nvme list */
lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
} else {
/* success, put on NVME buffer list */
lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
lpfc_ncmd->status = IOSTAT_SUCCESS;
num_posted++;
}
/* success, put on NVME buffer sgl list */
list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
}
}
/* continue until a nembed page worth of sgls */
if (post_cnt == 0)
continue;
/* post block of NVME buffer list sgls */
status = lpfc_sli4_post_nvme_sgl_block(phba, &blck_nblist,
post_cnt);
/* don't reset xirtag due to hole in xri block */
if (block_cnt == 0)
last_xritag = NO_XRI;
/* reset NVME buffer post count for next round of posting */
post_cnt = 0;
/* put posted NVME buffer-sgl posted on NVME buffer sgl list */
while (!list_empty(&blck_nblist)) {
list_remove_head(&blck_nblist, lpfc_ncmd,
struct lpfc_nvme_buf, list);
if (status) {
/* failure, put on abort nvme list */
lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
} else {
/* success, put on NVME buffer list */
lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
lpfc_ncmd->status = IOSTAT_SUCCESS;
num_posted++;
}
list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
}
}
/* Push NVME buffers with sgl posted to the available list */
while (!list_empty(&nvme_nblist)) {
list_remove_head(&nvme_nblist, lpfc_ncmd,
struct lpfc_nvme_buf, list);
lpfc_release_nvme_buf(phba, lpfc_ncmd);
}
return num_posted;
}
/**
* lpfc_repost_nvme_sgl_list - Repost all the allocated nvme buffer sgls
* @phba: pointer to lpfc hba data structure.
*
* This routine walks the list of nvme buffers that have been allocated and
* repost them to the port by using SGL block post. This is needed after a
* pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
* is responsible for moving all nvme buffers on the lpfc_abts_nvme_sgl_list
* to the lpfc_nvme_buf_list. If the repost fails, reject all nvme buffers.
*
* Returns: 0 = success, non-zero failure.
**/
int
lpfc_repost_nvme_sgl_list(struct lpfc_hba *phba)
{
LIST_HEAD(post_nblist);
int num_posted, rc = 0;
/* get all NVME buffers need to repost to a local list */
spin_lock_irq(&phba->nvme_buf_list_get_lock);
spin_lock(&phba->nvme_buf_list_put_lock);
list_splice_init(&phba->lpfc_nvme_buf_list_get, &post_nblist);
list_splice(&phba->lpfc_nvme_buf_list_put, &post_nblist);
phba->get_nvme_bufs = 0;
phba->put_nvme_bufs = 0;
spin_unlock(&phba->nvme_buf_list_put_lock);
spin_unlock_irq(&phba->nvme_buf_list_get_lock);
/* post the list of nvme buffer sgls to port if available */
if (!list_empty(&post_nblist)) {
num_posted = lpfc_post_nvme_sgl_list(phba, &post_nblist,
phba->sli4_hba.nvme_xri_cnt);
/* failed to post any nvme buffer, return error */
if (num_posted == 0)
rc = -EIO;
}
return rc;
}
/**
* lpfc_new_nvme_buf - Scsi buffer allocator for HBA with SLI4 IF spec
* @vport: The virtual port for which this call being executed.
* @num_to_allocate: The requested number of buffers to allocate.
*
* This routine allocates nvme buffers for device with SLI-4 interface spec,
* the nvme buffer contains all the necessary information needed to initiate
* a NVME I/O. After allocating up to @num_to_allocate NVME buffers and put
* them on a list, it post them to the port by using SGL block post.
*
* Return codes:
* int - number of nvme buffers that were allocated and posted.
* 0 = failure, less than num_to_alloc is a partial failure.
**/
static int
lpfc_new_nvme_buf(struct lpfc_vport *vport, int num_to_alloc)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_nvme_buf *lpfc_ncmd;
struct lpfc_iocbq *pwqeq;
union lpfc_wqe128 *wqe;
struct sli4_sge *sgl;
dma_addr_t pdma_phys_sgl;
uint16_t iotag, lxri = 0;
int bcnt, num_posted, sgl_size;
LIST_HEAD(prep_nblist);
LIST_HEAD(post_nblist);
LIST_HEAD(nvme_nblist);
sgl_size = phba->cfg_sg_dma_buf_size;
for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
lpfc_ncmd = kzalloc(sizeof(struct lpfc_nvme_buf), GFP_KERNEL);
if (!lpfc_ncmd)
break;
/*
* Get memory from the pci pool to map the virt space to
* pci bus space for an I/O. The DMA buffer includes the
* number of SGE's necessary to support the sg_tablesize.
*/
lpfc_ncmd->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
GFP_KERNEL,
&lpfc_ncmd->dma_handle);
if (!lpfc_ncmd->data) {
kfree(lpfc_ncmd);
break;
}
lxri = lpfc_sli4_next_xritag(phba);
if (lxri == NO_XRI) {
dma_pool_free(phba->lpfc_sg_dma_buf_pool,
lpfc_ncmd->data, lpfc_ncmd->dma_handle);
kfree(lpfc_ncmd);
break;
}
pwqeq = &(lpfc_ncmd->cur_iocbq);
wqe = &pwqeq->wqe;
/* Allocate iotag for lpfc_ncmd->cur_iocbq. */
iotag = lpfc_sli_next_iotag(phba, pwqeq);
if (iotag == 0) {
dma_pool_free(phba->lpfc_sg_dma_buf_pool,
lpfc_ncmd->data, lpfc_ncmd->dma_handle);
kfree(lpfc_ncmd);
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6121 Failed to allocated IOTAG for"
" XRI:0x%x\n", lxri);
lpfc_sli4_free_xri(phba, lxri);
break;
}
pwqeq->sli4_lxritag = lxri;
pwqeq->sli4_xritag = phba->sli4_hba.xri_ids[lxri];
pwqeq->iocb_flag |= LPFC_IO_NVME;
pwqeq->context1 = lpfc_ncmd;
pwqeq->wqe_cmpl = lpfc_nvme_io_cmd_wqe_cmpl;
/* Initialize local short-hand pointers. */
lpfc_ncmd->nvme_sgl = lpfc_ncmd->data;
sgl = lpfc_ncmd->nvme_sgl;
pdma_phys_sgl = lpfc_ncmd->dma_handle;
lpfc_ncmd->dma_phys_sgl = pdma_phys_sgl;
/* Rsp SGE will be filled in when we rcv an IO
* from the NVME Layer to be sent.
* The cmd is going to be embedded so we need a SKIP SGE.
*/
bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
bf_set(lpfc_sli4_sge_last, sgl, 0);
sgl->word2 = cpu_to_le32(sgl->word2);
/* Fill in word 3 / sgl_len during cmd submission */
lpfc_ncmd->cur_iocbq.context1 = lpfc_ncmd;
/* Initialize WQE */
memset(wqe, 0, sizeof(union lpfc_wqe));
/* add the nvme buffer to a post list */
list_add_tail(&lpfc_ncmd->list, &post_nblist);
spin_lock_irq(&phba->nvme_buf_list_get_lock);
phba->sli4_hba.nvme_xri_cnt++;
spin_unlock_irq(&phba->nvme_buf_list_get_lock);
}
lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
"6114 Allocate %d out of %d requested new NVME "
"buffers\n", bcnt, num_to_alloc);
/* post the list of nvme buffer sgls to port if available */
if (!list_empty(&post_nblist))
num_posted = lpfc_post_nvme_sgl_list(phba,
&post_nblist, bcnt);
else
num_posted = 0;
return num_posted;
}
static inline struct lpfc_nvme_buf *
lpfc_nvme_buf(struct lpfc_hba *phba)
{
struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next,
&phba->lpfc_nvme_buf_list_get, list) {
list_del_init(&lpfc_ncmd->list);
phba->get_nvme_bufs--;
return lpfc_ncmd;
}
return NULL;
}
/**
* lpfc_get_nvme_buf - Get a nvme buffer from lpfc_nvme_buf_list of the HBA
* @phba: The HBA for which this call is being executed.
*
* This routine removes a nvme buffer from head of @phba lpfc_nvme_buf_list list
* and returns to caller.
*
* Return codes:
* NULL - Error
* Pointer to lpfc_nvme_buf - Success
**/
static struct lpfc_nvme_buf *
lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
int expedite)
{
struct lpfc_nvme_buf *lpfc_ncmd = NULL;
unsigned long iflag = 0;
spin_lock_irqsave(&phba->nvme_buf_list_get_lock, iflag);
if (phba->get_nvme_bufs > LPFC_NVME_EXPEDITE_XRICNT || expedite)
lpfc_ncmd = lpfc_nvme_buf(phba);
if (!lpfc_ncmd) {
spin_lock(&phba->nvme_buf_list_put_lock);
list_splice(&phba->lpfc_nvme_buf_list_put,
&phba->lpfc_nvme_buf_list_get);
phba->get_nvme_bufs += phba->put_nvme_bufs;
INIT_LIST_HEAD(&phba->lpfc_nvme_buf_list_put);
phba->put_nvme_bufs = 0;
spin_unlock(&phba->nvme_buf_list_put_lock);
if (phba->get_nvme_bufs > LPFC_NVME_EXPEDITE_XRICNT || expedite)
lpfc_ncmd = lpfc_nvme_buf(phba);
}
spin_unlock_irqrestore(&phba->nvme_buf_list_get_lock, iflag);
return lpfc_ncmd;
}
/**
* lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
* @phba: The Hba for which this call is being executed.
* @lpfc_ncmd: The nvme buffer which is being released.
*
* This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
* lpfc_nvme_buf_list list. For SLI4 XRI's are tied to the nvme buffer
* and cannot be reused for at least RA_TOV amount of time if it was
* aborted.
**/
static void
lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_nvme_buf *lpfc_ncmd)
{
unsigned long iflag = 0;
lpfc_ncmd->nonsg_phys = 0;
if (lpfc_ncmd->flags & LPFC_SBUF_XBUSY) {
lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
"6310 XB release deferred for "
"ox_id x%x on reqtag x%x\n",
lpfc_ncmd->cur_iocbq.sli4_xritag,
lpfc_ncmd->cur_iocbq.iotag);
spin_lock_irqsave(&phba->sli4_hba.abts_nvme_buf_list_lock,
iflag);
list_add_tail(&lpfc_ncmd->list,
&phba->sli4_hba.lpfc_abts_nvme_buf_list);
spin_unlock_irqrestore(&phba->sli4_hba.abts_nvme_buf_list_lock,
iflag);
} else {
lpfc_ncmd->nvmeCmd = NULL;
lpfc_ncmd->cur_iocbq.iocb_flag = LPFC_IO_NVME;
spin_lock_irqsave(&phba->nvme_buf_list_put_lock, iflag);
list_add_tail(&lpfc_ncmd->list, &phba->lpfc_nvme_buf_list_put);
phba->put_nvme_bufs++;
spin_unlock_irqrestore(&phba->nvme_buf_list_put_lock, iflag);
}
}
/**
* lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
* @pvport - the lpfc_vport instance requesting a localport.
*
* This routine is invoked to create an nvme localport instance to bind
* to the nvme_fc_transport. It is called once during driver load
* like lpfc_create_shost after all other services are initialized.
* It requires a vport, vpi, and wwns at call time. Other localport
* parameters are modified as the driver's FCID and the Fabric WWN
* are established.
*
* Return codes
* 0 - successful
* -ENOMEM - no heap memory available
* other values - from nvme registration upcall
**/
int
lpfc_nvme_create_localport(struct lpfc_vport *vport)
{
int ret = 0;
struct lpfc_hba *phba = vport->phba;
struct nvme_fc_port_info nfcp_info;
struct nvme_fc_local_port *localport;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_ctrl_stat *cstat;
int len, i;
/* Initialize this localport instance. The vport wwn usage ensures
* that NPIV is accounted for.
*/
memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
/* Limit to LPFC_MAX_NVME_SEG_CNT.
* For now need + 1 to get around NVME transport logic.
*/
if (phba->cfg_sg_seg_cnt > LPFC_MAX_NVME_SEG_CNT) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_INIT,
"6300 Reducing sg segment cnt to %d\n",
LPFC_MAX_NVME_SEG_CNT);
phba->cfg_nvme_seg_cnt = LPFC_MAX_NVME_SEG_CNT;
} else {
phba->cfg_nvme_seg_cnt = phba->cfg_sg_seg_cnt;
}
lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
lpfc_nvme_template.max_hw_queues = phba->cfg_nvme_io_channel;
cstat = kmalloc((sizeof(struct lpfc_nvme_ctrl_stat) *
phba->cfg_nvme_io_channel), GFP_KERNEL);
if (!cstat)
return -ENOMEM;
/* localport is allocated from the stack, but the registration
* call allocates heap memory as well as the private area.
*/
#if (IS_ENABLED(CONFIG_NVME_FC))
ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
&vport->phba->pcidev->dev, &localport);
#else
ret = -ENOMEM;
#endif
if (!ret) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
"6005 Successfully registered local "
"NVME port num %d, localP %p, private %p, "
"sg_seg %d\n",
localport->port_num, localport,
localport->private,
lpfc_nvme_template.max_sgl_segments);
/* Private is our lport size declared in the template. */
lport = (struct lpfc_nvme_lport *)localport->private;
vport->localport = localport;
lport->vport = vport;
lport->cstat = cstat;
vport->nvmei_support = 1;
atomic_set(&lport->xmt_fcp_noxri, 0);
atomic_set(&lport->xmt_fcp_bad_ndlp, 0);
atomic_set(&lport->xmt_fcp_qdepth, 0);
atomic_set(&lport->xmt_fcp_err, 0);
atomic_set(&lport->xmt_fcp_wqerr, 0);
atomic_set(&lport->xmt_fcp_abort, 0);
atomic_set(&lport->xmt_ls_abort, 0);
atomic_set(&lport->xmt_ls_err, 0);
atomic_set(&lport->cmpl_fcp_xb, 0);
atomic_set(&lport->cmpl_fcp_err, 0);
atomic_set(&lport->cmpl_ls_xb, 0);
atomic_set(&lport->cmpl_ls_err, 0);
atomic_set(&lport->fc4NvmeLsRequests, 0);
atomic_set(&lport->fc4NvmeLsCmpls, 0);
for (i = 0; i < phba->cfg_nvme_io_channel; i++) {
cstat = &lport->cstat[i];
atomic_set(&cstat->fc4NvmeInputRequests, 0);
atomic_set(&cstat->fc4NvmeOutputRequests, 0);
atomic_set(&cstat->fc4NvmeControlRequests, 0);
atomic_set(&cstat->fc4NvmeIoCmpls, 0);
}
/* Don't post more new bufs if repost already recovered
* the nvme sgls.
*/
if (phba->sli4_hba.nvme_xri_cnt == 0) {
len = lpfc_new_nvme_buf(vport,
phba->sli4_hba.nvme_xri_max);
vport->phba->total_nvme_bufs += len;
}
} else {
kfree(cstat);
}
return ret;
}
/* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg.
*
* The driver has to wait for the host nvme transport to callback
* indicating the localport has successfully unregistered all
* resources. Since this is an uninterruptible wait, loop every ten
* seconds and print a message indicating no progress.
*
* An uninterruptible wait is used because of the risk of transport-to-
* driver state mismatch.
*/
void
lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
struct lpfc_nvme_lport *lport)
{
#if (IS_ENABLED(CONFIG_NVME_FC))
u32 wait_tmo;
int ret;
/* Host transport has to clean up and confirm requiring an indefinite
* wait. Print a message if a 10 second wait expires and renew the
* wait. This is unexpected.
*/
wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000);
while (true) {
ret = wait_for_completion_timeout(&lport->lport_unreg_done,
wait_tmo);
if (unlikely(!ret)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
"6176 Lport %p Localport %p wait "
"timed out. Renewing.\n",
lport, vport->localport);
continue;
}
break;
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
"6177 Lport %p Localport %p Complete Success\n",
lport, vport->localport);
#endif
}
/**
* lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
* @pnvme: pointer to lpfc nvme data structure.
*
* This routine is invoked to destroy all lports bound to the phba.
* The lport memory was allocated by the nvme fc transport and is
* released there. This routine ensures all rports bound to the
* lport have been disconnected.
*
**/
void
lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
{
#if (IS_ENABLED(CONFIG_NVME_FC))
struct nvme_fc_local_port *localport;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_ctrl_stat *cstat;
int ret;
if (vport->nvmei_support == 0)
return;
localport = vport->localport;
vport->localport = NULL;
lport = (struct lpfc_nvme_lport *)localport->private;
cstat = lport->cstat;
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
"6011 Destroying NVME localport %p\n",
localport);
/* lport's rport list is clear. Unregister
* lport and release resources.
*/
init_completion(&lport->lport_unreg_done);
ret = nvme_fc_unregister_localport(localport);
/* Wait for completion. This either blocks
* indefinitely or succeeds
*/
lpfc_nvme_lport_unreg_wait(vport, lport);
kfree(cstat);
/* Regardless of the unregister upcall response, clear
* nvmei_support. All rports are unregistered and the
* driver will clean up.
*/
vport->nvmei_support = 0;
if (ret == 0) {
lpfc_printf_vlog(vport,
KERN_INFO, LOG_NVME_DISC,
"6009 Unregistered lport Success\n");
} else {
lpfc_printf_vlog(vport,
KERN_INFO, LOG_NVME_DISC,
"6010 Unregistered lport "
"Failed, status x%x\n",
ret);
}
#endif
}
void
lpfc_nvme_update_localport(struct lpfc_vport *vport)
{
#if (IS_ENABLED(CONFIG_NVME_FC))
struct nvme_fc_local_port *localport;
struct lpfc_nvme_lport *lport;
localport = vport->localport;
if (!localport) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
"6710 Update NVME fail. No localport\n");
return;
}
lport = (struct lpfc_nvme_lport *)localport->private;
if (!lport) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
"6171 Update NVME fail. localP %p, No lport\n",
localport);
return;
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
"6012 Update NVME lport %p did x%x\n",
localport, vport->fc_myDID);
localport->port_id = vport->fc_myDID;
if (localport->port_id == 0)
localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
else
localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
"6030 bound lport %p to DID x%06x\n",
lport, localport->port_id);
#endif
}
int
lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
#if (IS_ENABLED(CONFIG_NVME_FC))
int ret = 0;
struct nvme_fc_local_port *localport;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_rport *rport;
struct lpfc_nvme_rport *oldrport;
struct nvme_fc_remote_port *remote_port;
struct nvme_fc_port_info rpinfo;
struct lpfc_nodelist *prev_ndlp;
lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
"6006 Register NVME PORT. DID x%06x nlptype x%x\n",
ndlp->nlp_DID, ndlp->nlp_type);
localport = vport->localport;
if (!localport)
return 0;
lport = (struct lpfc_nvme_lport *)localport->private;
/* NVME rports are not preserved across devloss.
* Just register this instance. Note, rpinfo->dev_loss_tmo
* is left 0 to indicate accept transport defaults. The
* driver communicates port role capabilities consistent
* with the PRLI response data.
*/
memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
rpinfo.port_id = ndlp->nlp_DID;
if (ndlp->nlp_type & NLP_NVME_TARGET)
rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
if (ndlp->nlp_type & NLP_NVME_INITIATOR)
rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
oldrport = lpfc_ndlp_get_nrport(ndlp);
if (!oldrport)
lpfc_nlp_get(ndlp);
ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
if (!ret) {
/* If the ndlp already has an nrport, this is just
* a resume of the existing rport. Else this is a
* new rport.
*/
/* Guard against an unregister/reregister
* race that leaves the WAIT flag set.
*/
spin_lock_irq(&vport->phba->hbalock);
ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
spin_unlock_irq(&vport->phba->hbalock);
rport = remote_port->private;
if (oldrport) {
if (oldrport == remote_port->private) {
/* Same remoteport. Just reuse. */
lpfc_printf_vlog(ndlp->vport, KERN_INFO,
LOG_NVME_DISC,
"6014 Rebinding lport to "
"remoteport %p wwpn 0x%llx, "
"Data: x%x x%x %p x%x x%06x\n",
remote_port,
remote_port->port_name,
remote_port->port_id,
remote_port->port_role,
ndlp,
ndlp->nlp_type,
ndlp->nlp_DID);
return 0;
}
prev_ndlp = rport->ndlp;
/* Sever the ndlp<->rport association
* before dropping the ndlp ref from
* register.
*/
spin_lock_irq(&vport->phba->hbalock);
ndlp->nrport = NULL;
ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
spin_unlock_irq(&vport->phba->hbalock);
rport->ndlp = NULL;
rport->remoteport = NULL;
/* Reference only removed if previous NDLP is no longer
* active. It might be just a swap and removing the
* reference would cause a premature cleanup.
*/
if (prev_ndlp && prev_ndlp != ndlp) {
if ((!NLP_CHK_NODE_ACT(prev_ndlp)) ||
(!prev_ndlp->nrport))
lpfc_nlp_put(prev_ndlp);
}
}
/* Clean bind the rport to the ndlp. */
rport->remoteport = remote_port;
rport->lport = lport;
rport->ndlp = ndlp;
spin_lock_irq(&vport->phba->hbalock);
ndlp->nrport = rport;
spin_unlock_irq(&vport->phba->hbalock);
lpfc_printf_vlog(vport, KERN_INFO,
LOG_NVME_DISC | LOG_NODE,
"6022 Binding new rport to "
"lport %p Remoteport %p WWNN 0x%llx, "
"Rport WWPN 0x%llx DID "
"x%06x Role x%x, ndlp %p\n",
lport, remote_port,
rpinfo.node_name, rpinfo.port_name,
rpinfo.port_id, rpinfo.port_role,
ndlp);
} else {
lpfc_printf_vlog(vport, KERN_ERR,
LOG_NVME_DISC | LOG_NODE,
"6031 RemotePort Registration failed "
"err: %d, DID x%06x\n",
ret, ndlp->nlp_DID);
}
return ret;
#else
return 0;
#endif
}
/* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
*
* There is no notion of Devloss or rport recovery from the current
* nvme_transport perspective. Loss of an rport just means IO cannot
* be sent and recovery is completely up to the initator.
* For now, the driver just unbinds the DID and port_role so that
* no further IO can be issued. Changes are planned for later.
*
* Notes - the ndlp reference count is not decremented here since
* since there is no nvme_transport api for devloss. Node ref count
* is only adjusted in driver unload.
*/
void
lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
#if (IS_ENABLED(CONFIG_NVME_FC))
int ret;
struct nvme_fc_local_port *localport;
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_rport *rport;
struct nvme_fc_remote_port *remoteport;
localport = vport->localport;
/* This is fundamental error. The localport is always
* available until driver unload. Just exit.
*/
if (!localport)
return;
lport = (struct lpfc_nvme_lport *)localport->private;
if (!lport)
goto input_err;
rport = lpfc_ndlp_get_nrport(ndlp);
if (!rport)
goto input_err;
remoteport = rport->remoteport;
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
"6033 Unreg nvme remoteport %p, portname x%llx, "
"port_id x%06x, portstate x%x port type x%x\n",
remoteport, remoteport->port_name,
remoteport->port_id, remoteport->port_state,
ndlp->nlp_type);
/* Sanity check ndlp type. Only call for NVME ports. Don't
* clear any rport state until the transport calls back.
*/
if (ndlp->nlp_type & NLP_NVME_TARGET) {
/* No concern about the role change on the nvme remoteport.
* The transport will update it.
*/
ndlp->upcall_flags |= NLP_WAIT_FOR_UNREG;
/* Don't let the host nvme transport keep sending keep-alives
* on this remoteport. Vport is unloading, no recovery. The
* return values is ignored. The upcall is a courtesy to the
* transport.
*/
if (vport->load_flag & FC_UNLOADING)
(void)nvme_fc_set_remoteport_devloss(remoteport, 0);
ret = nvme_fc_unregister_remoteport(remoteport);
if (ret != 0) {
lpfc_nlp_put(ndlp);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6167 NVME unregister failed %d "
"port_state x%x\n",
ret, remoteport->port_state);
}
}
return;
input_err:
#endif
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6168 State error: lport %p, rport%p FCID x%06x\n",
vport->localport, ndlp->rport, ndlp->nlp_DID);
}
/**
* lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
* @phba: pointer to lpfc hba data structure.
* @axri: pointer to the fcp xri abort wcqe structure.
*
* This routine is invoked by the worker thread to process a SLI4 fast-path
* NVME aborted xri. Aborted NVME IO commands are completed to the transport
* here.
**/
void
lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
struct sli4_wcqe_xri_aborted *axri)
{
uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
struct lpfc_nvme_buf *lpfc_ncmd, *next_lpfc_ncmd;
struct nvmefc_fcp_req *nvme_cmd = NULL;
struct lpfc_nodelist *ndlp;
unsigned long iflag = 0;
if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
return;
spin_lock_irqsave(&phba->hbalock, iflag);
spin_lock(&phba->sli4_hba.abts_nvme_buf_list_lock);
list_for_each_entry_safe(lpfc_ncmd, next_lpfc_ncmd,
&phba->sli4_hba.lpfc_abts_nvme_buf_list,
list) {
if (lpfc_ncmd->cur_iocbq.sli4_xritag == xri) {
list_del_init(&lpfc_ncmd->list);
lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
lpfc_ncmd->status = IOSTAT_SUCCESS;
spin_unlock(
&phba->sli4_hba.abts_nvme_buf_list_lock);
spin_unlock_irqrestore(&phba->hbalock, iflag);
ndlp = lpfc_ncmd->ndlp;
if (ndlp)
lpfc_sli4_abts_err_handler(phba, ndlp, axri);
lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
"6311 nvme_cmd %p xri x%x tag x%x "
"abort complete and xri released\n",
lpfc_ncmd->nvmeCmd, xri,
lpfc_ncmd->cur_iocbq.iotag);
/* Aborted NVME commands are required to not complete
* before the abort exchange command fully completes.
* Once completed, it is available via the put list.
*/
if (lpfc_ncmd->nvmeCmd) {
nvme_cmd = lpfc_ncmd->nvmeCmd;
nvme_cmd->done(nvme_cmd);
lpfc_ncmd->nvmeCmd = NULL;
}
lpfc_release_nvme_buf(phba, lpfc_ncmd);
return;
}
}
spin_unlock(&phba->sli4_hba.abts_nvme_buf_list_lock);
spin_unlock_irqrestore(&phba->hbalock, iflag);
lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
"6312 XRI Aborted xri x%x not found\n", xri);
}
/**
* lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete
* @phba: Pointer to HBA context object.
*
* This function flushes all wqes in the nvme rings and frees all resources
* in the txcmplq. This function does not issue abort wqes for the IO
* commands in txcmplq, they will just be returned with
* IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
* slot has been permanently disabled.
**/
void
lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
{
struct lpfc_sli_ring *pring;
u32 i, wait_cnt = 0;
if (phba->sli_rev < LPFC_SLI_REV4)
return;
/* Cycle through all NVME rings and make sure all outstanding
* WQEs have been removed from the txcmplqs.
*/
for (i = 0; i < phba->cfg_nvme_io_channel; i++) {
pring = phba->sli4_hba.nvme_wq[i]->pring;
/* Retrieve everything on the txcmplq */
while (!list_empty(&pring->txcmplq)) {
msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1);
wait_cnt++;
/* The sleep is 10mS. Every ten seconds,
* dump a message. Something is wrong.
*/
if ((wait_cnt % 1000) == 0) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6178 NVME IO not empty, "
"cnt %d\n", wait_cnt);
}
}
}
}
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