leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
2a5b7d626e
linux/drivers/scsi/lpfc/lpfc_nvme.c
James Smart 2a5b7d626e scsi: lpfc: Limit tracking of tgt queue depth in fast path 
Performance is affected when target queue depth is tracked.  An atomic
counter is incremented on the submission path which competes with it being
decremented on the completion path.  In addition, multiple CPUs can
simultaniously be manipulating this counter for the same ndlp.

Reduce the overhead by only performing the target increment/decrement when
the target queue depth is less than the overall adapter depth, thus is
actually meaningful.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-08-02 15:45:19 -04:00

3014 lines
91 KiB
C
Raw Blame History

/*******************************************************************
* 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;
/* 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);
/* Words 13 14 15 are for PBDE support */
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->cfg_enable_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 {
/* 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 (lpfc_ndlp_check_qdepth(phba, ndlp)) {
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;
}
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);
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);
if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_ncmd) {
atomic_inc(&ndlp->cmd_pending);
lpfc_ncmd->flags |= LPFC_BUMP_QDEPTH;
}
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;
if ((lpfc_ncmd->flags & LPFC_BUMP_QDEPTH) && lpfc_ncmd->ndlp)
atomic_dec(&lpfc_ncmd->ndlp->cmd_pending);
lpfc_ncmd->nonsg_phys = 0;
lpfc_ncmd->ndlp = NULL;
lpfc_ncmd->flags &= ~LPFC_BUMP_QDEPTH;
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 = NULL;
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) {
/* New remoteport record does not guarantee valid
* host private memory area.
*/
prev_ndlp = oldrport->ndlp;
if (oldrport == remote_port->private) {
/* Same remoteport - ndlp should match.
* 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 %p x%x x%06x\n",
remote_port,
remote_port->port_name,
remote_port->port_id,
remote_port->port_role,
prev_ndlp,
ndlp,
ndlp->nlp_type,
ndlp->nlp_DID);
return 0;
}
/* 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 rport %p WWNN 0x%llx, "
"Rport WWPN 0x%llx DID "
"x%06x Role x%x, ndlp %p prev_ndlp %p\n",
lport, remote_port, rport,
rpinfo.node_name, rpinfo.port_name,
rpinfo.port_id, rpinfo.port_role,
ndlp, prev_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 || !phba->sli4_hba.nvme_wq)
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;
if (!pring)
continue;
/* 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);
}
}
}
}
Reference in New Issue View Git Blame Copy Permalink