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path: root/drivers/scsi/lpfc/lpfc_nvme.c
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Diffstat (limited to 'drivers/scsi/lpfc/lpfc_nvme.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_nvme.c2837
1 files changed, 2837 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
new file mode 100644
index 000000000..152245f7c
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_nvme.c
@@ -0,0 +1,2837 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for *
+ * Fibre Channel Host Bus Adapters. *
+ * Copyright (C) 2017-2022 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 "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_io_buf *
+lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
+ int idx, int expedite);
+
+static void
+lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_io_buf *);
+
+static struct nvme_fc_port_template lpfc_nvme_template;
+
+/**
+ * lpfc_nvme_create_queue -
+ * @pnvme_lport: Transport localport that LS is to be issued from
+ * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
+ * @qsize: Size of the queue in bytes
+ * @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;
+
+ if (!vport || vport->load_flag & FC_UNLOADING ||
+ vport->phba->hba_flag & HBA_IOQ_FLUSH)
+ return -ENODEV;
+
+ qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
+ if (qhandle == NULL)
+ return -ENOMEM;
+
+ qhandle->cpu_id = raw_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) %
+ lpfc_nvme_template.max_hw_queues);
+ } else {
+ str = "ADM"; /* Admin queue */
+ qhandle->index = qidx;
+ }
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
+ "6073 Binding %s HdwQueue %d (cpu %d) to "
+ "hdw_queue %d qhandle x%px\n", str,
+ qidx, qhandle->cpu_id, qhandle->index, qhandle);
+ *handle = (void *)qhandle;
+ return 0;
+}
+
+/**
+ * lpfc_nvme_delete_queue -
+ * @pnvme_lport: Transport localport that LS is to be issued from
+ * @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 x%px, qidx x%x qhandle x%px\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 x%px delete complete\n",
+ lport);
+
+ /* release any threads waiting for the unreg to complete */
+ if (lport->vport->localport)
+ complete(lport->lport_unreg_cmp);
+}
+
+/* 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
+ */
+static 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;
+ u32 fc4_xpt_flags;
+
+ ndlp = rport->ndlp;
+ if (!ndlp) {
+ pr_err("**** %s: NULL ndlp on rport x%px remoteport x%px\n",
+ __func__, rport, remoteport);
+ goto rport_err;
+ }
+
+ vport = ndlp->vport;
+ if (!vport) {
+ pr_err("**** %s: Null vport on ndlp x%px, ste x%x rport x%px\n",
+ __func__, ndlp, ndlp->nlp_state, rport);
+ goto rport_err;
+ }
+
+ fc4_xpt_flags = NVME_XPT_REGD | SCSI_XPT_REGD;
+
+ /* 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 x%px, ndlp x%px "
+ "DID x%x xflags x%x\n",
+ remoteport, ndlp, ndlp->nlp_DID, ndlp->fc4_xpt_flags);
+ spin_lock_irq(&ndlp->lock);
+
+ /* The register rebind might have occurred before the delete
+ * downcall. Guard against this race.
+ */
+ if (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT)
+ ndlp->fc4_xpt_flags &= ~(NVME_XPT_UNREG_WAIT | NVME_XPT_REGD);
+
+ spin_unlock_irq(&ndlp->lock);
+
+ /* On a devloss timeout event, one more put is executed provided the
+ * NVME and SCSI rport unregister requests are complete. If the vport
+ * is unloading, this extra put is executed by lpfc_drop_node.
+ */
+ if (!(ndlp->fc4_xpt_flags & fc4_xpt_flags))
+ lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
+
+ rport_err:
+ return;
+}
+
+/**
+ * lpfc_nvme_handle_lsreq - Process an unsolicited NVME LS request
+ * @phba: pointer to lpfc hba data structure.
+ * @axchg: pointer to exchange context for the NVME LS request
+ *
+ * This routine is used for processing an asychronously received NVME LS
+ * request. Any remaining validation is done and the LS is then forwarded
+ * to the nvme-fc transport via nvme_fc_rcv_ls_req().
+ *
+ * The calling sequence should be: nvme_fc_rcv_ls_req() -> (processing)
+ * -> lpfc_nvme_xmt_ls_rsp/cmp -> req->done.
+ * __lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
+ *
+ * Returns 0 if LS was handled and delivered to the transport
+ * Returns 1 if LS failed to be handled and should be dropped
+ */
+int
+lpfc_nvme_handle_lsreq(struct lpfc_hba *phba,
+ struct lpfc_async_xchg_ctx *axchg)
+{
+#if (IS_ENABLED(CONFIG_NVME_FC))
+ struct lpfc_vport *vport;
+ struct lpfc_nvme_rport *lpfc_rport;
+ struct nvme_fc_remote_port *remoteport;
+ struct lpfc_nvme_lport *lport;
+ uint32_t *payload = axchg->payload;
+ int rc;
+
+ vport = axchg->ndlp->vport;
+ lpfc_rport = axchg->ndlp->nrport;
+ if (!lpfc_rport)
+ return -EINVAL;
+
+ remoteport = lpfc_rport->remoteport;
+ if (!vport->localport ||
+ vport->phba->hba_flag & HBA_IOQ_FLUSH)
+ return -EINVAL;
+
+ lport = vport->localport->private;
+ if (!lport)
+ return -EINVAL;
+
+ rc = nvme_fc_rcv_ls_req(remoteport, &axchg->ls_rsp, axchg->payload,
+ axchg->size);
+
+ lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+ "6205 NVME Unsol rcv: sz %d rc %d: %08x %08x %08x "
+ "%08x %08x %08x\n",
+ axchg->size, rc,
+ *payload, *(payload+1), *(payload+2),
+ *(payload+3), *(payload+4), *(payload+5));
+
+ if (!rc)
+ return 0;
+#endif
+ return 1;
+}
+
+/**
+ * __lpfc_nvme_ls_req_cmp - Generic completion handler for a NVME
+ * LS request.
+ * @phba: Pointer to HBA context object
+ * @vport: The local port that issued the LS
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * This function is the generic completion handler for NVME LS requests.
+ * The function updates any states and statistics, calls the transport
+ * ls_req done() routine, then tears down the command and buffers used
+ * for the LS request.
+ **/
+void
+__lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_vport *vport,
+ struct lpfc_iocbq *cmdwqe,
+ struct lpfc_wcqe_complete *wcqe)
+{
+ struct nvmefc_ls_req *pnvme_lsreq;
+ struct lpfc_dmabuf *buf_ptr;
+ struct lpfc_nodelist *ndlp;
+ uint32_t status;
+
+ pnvme_lsreq = cmdwqe->context_un.nvme_lsreq;
+ ndlp = cmdwqe->ndlp;
+ buf_ptr = cmdwqe->bpl_dmabuf;
+
+ status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+ "6047 NVMEx LS REQ x%px cmpl DID %x Xri: %x "
+ "status %x reason x%x cmd:x%px lsreg:x%px bmp:x%px "
+ "ndlp:x%px\n",
+ pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
+ cmdwqe->sli4_xritag, status,
+ (wcqe->parameter & 0xffff),
+ cmdwqe, pnvme_lsreq, cmdwqe->bpl_dmabuf,
+ ndlp);
+
+ lpfc_nvmeio_data(phba, "NVMEx LS CMPL: xri x%x stat x%x parm x%x\n",
+ cmdwqe->sli4_xritag, status, wcqe->parameter);
+
+ if (buf_ptr) {
+ lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
+ kfree(buf_ptr);
+ cmdwqe->bpl_dmabuf = NULL;
+ }
+ if (pnvme_lsreq->done)
+ pnvme_lsreq->done(pnvme_lsreq, status);
+ else
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6046 NVMEx cmpl without done call back? "
+ "Data x%px 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->ndlp = NULL;
+ }
+ lpfc_sli_release_iocbq(phba, cmdwqe);
+}
+
+static void
+lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+ struct lpfc_iocbq *rspwqe)
+{
+ struct lpfc_vport *vport = cmdwqe->vport;
+ struct lpfc_nvme_lport *lport;
+ uint32_t status;
+ struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
+
+ 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);
+ }
+ }
+ }
+
+ __lpfc_nvme_ls_req_cmp(phba, vport, cmdwqe, wcqe);
+}
+
+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_iocbq *),
+ 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;
+ /* Initialize only 64 bytes */
+ memset(wqe, 0, sizeof(union lpfc_wqe));
+
+ genwqe->bpl_dmabuf = bmp;
+ genwqe->cmd_flag |= LPFC_IO_NVME_LS;
+
+ /* Save for completion so we can release these resources */
+ genwqe->ndlp = lpfc_nlp_get(ndlp);
+ if (!genwqe->ndlp) {
+ dev_warn(&phba->pcidev->dev,
+ "Warning: Failed node ref, not sending LS_REQ\n");
+ lpfc_sli_release_iocbq(phba, genwqe);
+ return 1;
+ }
+
+ genwqe->context_un.nvme_lsreq = 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->num_bdes = 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, tmo);
+ 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> */
+ genwqe->cmd_cmpl = cmpl;
+ 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, &phba->sli4_hba.hdwq[0], genwqe);
+ if (rc) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6045 Issue GEN REQ WQE to NPORT x%x "
+ "Data: x%x x%x rc x%x\n",
+ ndlp->nlp_DID, genwqe->iotag,
+ vport->port_state, rc);
+ lpfc_nlp_put(ndlp);
+ lpfc_sli_release_iocbq(phba, genwqe);
+ return 1;
+ }
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_ELS,
+ "6050 Issue GEN REQ WQE to NPORT x%x "
+ "Data: oxid: x%x state: x%x wq:x%px lsreq:x%px "
+ "bmp:x%px xmit:%d 1st:%d\n",
+ ndlp->nlp_DID, genwqe->sli4_xritag,
+ vport->port_state,
+ genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
+ return 0;
+}
+
+
+/**
+ * __lpfc_nvme_ls_req - Generic service routine to issue an NVME LS request
+ * @vport: The local port issuing the LS
+ * @ndlp: The remote port to send the LS to
+ * @pnvme_lsreq: Pointer to LS request structure from the transport
+ * @gen_req_cmp: Completion call-back
+ *
+ * Routine validates the ndlp, builds buffers and sends a GEN_REQUEST
+ * WQE to perform the LS operation.
+ *
+ * Return value :
+ * 0 - Success
+ * non-zero: various error codes, in form of -Exxx
+ **/
+int
+__lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+ struct nvmefc_ls_req *pnvme_lsreq,
+ void (*gen_req_cmp)(struct lpfc_hba *phba,
+ struct lpfc_iocbq *cmdwqe,
+ struct lpfc_iocbq *rspwqe))
+{
+ struct lpfc_dmabuf *bmp;
+ struct ulp_bde64 *bpl;
+ int ret;
+ uint16_t ntype, nstate;
+
+ if (!ndlp) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6051 NVMEx LS REQ: Bad NDLP x%px, Failing "
+ "LS Req\n",
+ ndlp);
+ return -ENODEV;
+ }
+
+ 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_TRACE_EVENT,
+ "6088 NVMEx LS REQ: Fail DID x%06x not "
+ "ready for IO. Type x%x, State x%x\n",
+ ndlp->nlp_DID, ntype, nstate);
+ return -ENODEV;
+ }
+ if (vport->phba->hba_flag & HBA_IOQ_FLUSH)
+ return -ENODEV;
+
+ if (!vport->phba->sli4_hba.nvmels_wq)
+ return -ENOMEM;
+
+ /*
+ * 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.
+ */
+
+ bmp = kmalloc(sizeof(*bmp), GFP_KERNEL);
+ if (!bmp) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6044 NVMEx LS REQ: Could not alloc LS buf "
+ "for DID %x\n",
+ ndlp->nlp_DID);
+ return -ENOMEM;
+ }
+
+ bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
+ if (!bmp->virt) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6042 NVMEx LS REQ: Could not alloc mbuf "
+ "for DID %x\n",
+ ndlp->nlp_DID);
+ kfree(bmp);
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&bmp->list);
+
+ 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);
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+ "6149 NVMEx LS REQ: Issue to DID 0x%06x lsreq x%px, "
+ "rqstlen:%d rsplen:%d %pad %pad\n",
+ ndlp->nlp_DID, pnvme_lsreq, pnvme_lsreq->rqstlen,
+ pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
+ &pnvme_lsreq->rspdma);
+
+ ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
+ pnvme_lsreq, gen_req_cmp, ndlp, 2,
+ pnvme_lsreq->timeout, 0);
+ if (ret != WQE_SUCCESS) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6052 NVMEx REQ: EXIT. issue ls wqe failed "
+ "lsreq x%px Status %x DID %x\n",
+ pnvme_lsreq, ret, ndlp->nlp_DID);
+ lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
+ kfree(bmp);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * lpfc_nvme_ls_req - Issue an NVME Link Service request
+ * @pnvme_lport: Transport localport that LS is to be issued from.
+ * @pnvme_rport: Transport remoteport that LS is to be sent to.
+ * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
+ *
+ * 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
+ * non-zero: various error codes, in form of -Exxx
+ **/
+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)
+{
+ struct lpfc_nvme_lport *lport;
+ struct lpfc_nvme_rport *rport;
+ struct lpfc_vport *vport;
+ int ret;
+
+ 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 ||
+ vport->phba->hba_flag & HBA_IOQ_FLUSH)
+ return -ENODEV;
+
+ atomic_inc(&lport->fc4NvmeLsRequests);
+
+ ret = __lpfc_nvme_ls_req(vport, rport->ndlp, pnvme_lsreq,
+ lpfc_nvme_ls_req_cmp);
+ if (ret)
+ atomic_inc(&lport->xmt_ls_err);
+
+ return ret;
+}
+
+/**
+ * __lpfc_nvme_ls_abort - Generic service routine to abort a prior
+ * NVME LS request
+ * @vport: The local port that issued the LS
+ * @ndlp: The remote port the LS was sent to
+ * @pnvme_lsreq: Pointer to LS request structure from the transport
+ *
+ * The driver validates the ndlp, looks for the LS, and aborts the
+ * LS if found.
+ *
+ * Returns:
+ * 0 : if LS found and aborted
+ * non-zero: various error conditions in form -Exxx
+ **/
+int
+__lpfc_nvme_ls_abort(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+ struct nvmefc_ls_req *pnvme_lsreq)
+{
+ struct lpfc_hba *phba = vport->phba;
+ struct lpfc_sli_ring *pring;
+ struct lpfc_iocbq *wqe, *next_wqe;
+ bool foundit = false;
+
+ if (!ndlp) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6049 NVMEx LS REQ Abort: Bad NDLP x%px DID "
+ "x%06x, Failing LS Req\n",
+ ndlp, ndlp ? ndlp->nlp_DID : 0);
+ return -EINVAL;
+ }
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
+ "6040 NVMEx LS REQ Abort: Issue LS_ABORT for lsreq "
+ "x%px rqstlen:%d rsplen:%d %pad %pad\n",
+ pnvme_lsreq, pnvme_lsreq->rqstlen,
+ pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
+ &pnvme_lsreq->rspdma);
+
+ /*
+ * Lock the ELS ring txcmplq and look for the wqe that matches
+ * this ELS. If found, issue an abort on the wqe.
+ */
+ 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) {
+ if (wqe->context_un.nvme_lsreq == pnvme_lsreq) {
+ wqe->cmd_flag |= LPFC_DRIVER_ABORTED;
+ foundit = true;
+ break;
+ }
+ }
+ spin_unlock(&pring->ring_lock);
+
+ if (foundit)
+ lpfc_sli_issue_abort_iotag(phba, pring, wqe, NULL);
+ spin_unlock_irq(&phba->hbalock);
+
+ if (foundit)
+ return 0;
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
+ "6213 NVMEx LS REQ Abort: Unable to locate req x%px\n",
+ pnvme_lsreq);
+ return -EINVAL;
+}
+
+static int
+lpfc_nvme_xmt_ls_rsp(struct nvme_fc_local_port *localport,
+ struct nvme_fc_remote_port *remoteport,
+ struct nvmefc_ls_rsp *ls_rsp)
+{
+ struct lpfc_async_xchg_ctx *axchg =
+ container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
+ struct lpfc_nvme_lport *lport;
+ int rc;
+
+ if (axchg->phba->pport->load_flag & FC_UNLOADING)
+ return -ENODEV;
+
+ lport = (struct lpfc_nvme_lport *)localport->private;
+
+ rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, __lpfc_nvme_xmt_ls_rsp_cmp);
+
+ if (rc) {
+ /*
+ * unless the failure is due to having already sent
+ * the response, an abort will be generated for the
+ * exchange if the rsp can't be sent.
+ */
+ if (rc != -EALREADY)
+ atomic_inc(&lport->xmt_ls_abort);
+ return rc;
+ }
+
+ return 0;
+}
+
+/**
+ * lpfc_nvme_ls_abort - Abort a prior NVME LS request
+ * @pnvme_lport: Transport localport that LS is to be issued from.
+ * @pnvme_rport: Transport remoteport that LS is to be sent to.
+ * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
+ *
+ * Driver registers this routine to abort a NVME LS request that is
+ * in progress (from the transports perspective).
+ **/
+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_nodelist *ndlp;
+ int ret;
+
+ lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
+ if (unlikely(!lport))
+ return;
+ vport = lport->vport;
+
+ if (vport->load_flag & FC_UNLOADING)
+ return;
+
+ ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
+
+ ret = __lpfc_nvme_ls_abort(vport, ndlp, pnvme_lsreq);
+ if (!ret)
+ atomic_inc(&lport->xmt_ls_abort);
+}
+
+/* Fix up the existing sgls for NVME IO. */
+static inline void
+lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
+ struct lpfc_io_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->dma_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);
+}
+
+
+/*
+ * lpfc_nvme_io_cmd_cmpl - Complete an NVME-over-FCP IO
+ *
+ * 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_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
+ struct lpfc_iocbq *pwqeOut)
+{
+ struct lpfc_io_buf *lpfc_ncmd = pwqeIn->io_buf;
+ struct lpfc_wcqe_complete *wcqe = &pwqeOut->wcqe_cmpl;
+ 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_nodelist *ndlp;
+ struct lpfc_nvme_fcpreq_priv *freqpriv;
+ struct lpfc_nvme_lport *lport;
+ uint32_t code, status, idx;
+ uint16_t cid, sqhd, data;
+ uint32_t *ptr;
+ uint32_t lat;
+ bool call_done = false;
+#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
+ int cpu;
+#endif
+ int offline = 0;
+
+ /* Sanity check on return of outstanding command */
+ if (!lpfc_ncmd) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6071 Null lpfc_ncmd pointer. No "
+ "release, skip completion\n");
+ return;
+ }
+
+ /* Guard against abort handler being called at same time */
+ spin_lock(&lpfc_ncmd->buf_lock);
+
+ if (!lpfc_ncmd->nvmeCmd) {
+ spin_unlock(&lpfc_ncmd->buf_lock);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6066 Missing cmpl ptrs: lpfc_ncmd x%px, "
+ "nvmeCmd x%px\n",
+ lpfc_ncmd, lpfc_ncmd->nvmeCmd);
+
+ /* Release the lpfc_ncmd regardless of the missing elements. */
+ lpfc_release_nvme_buf(phba, lpfc_ncmd);
+ return;
+ }
+ nCmd = lpfc_ncmd->nvmeCmd;
+ status = bf_get(lpfc_wcqe_c_status, wcqe);
+
+ idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
+ phba->sli4_hba.hdwq[idx].nvme_cstat.io_cmpls++;
+
+ if (unlikely(status && vport->localport)) {
+ lport = (struct lpfc_nvme_lport *)vport->localport->private;
+ if (lport) {
+ 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 = lpfc_ncmd->ndlp;
+ if (!ndlp) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "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;
+
+ /* Get the NVME cmd details for this unique error. */
+ cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
+ ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
+
+ /* Check if this is really an ERSP */
+ if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN) {
+ lpfc_ncmd->status = IOSTAT_SUCCESS;
+ lpfc_ncmd->result = 0;
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
+ "6084 NVME FCP_ERR ERSP: "
+ "xri %x placed x%x opcode x%x cmd_id "
+ "x%x cqe_status x%x\n",
+ lpfc_ncmd->cur_iocbq.sli4_xritag,
+ wcqe->total_data_placed,
+ cp->sqe.common.opcode,
+ cp->sqe.common.command_id,
+ ep->cqe.status);
+ break;
+ }
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6081 NVME Completion Protocol Error: "
+ "xri %x status x%x result x%x "
+ "placed x%x opcode x%x cmd_id x%x, "
+ "cqe_status x%x\n",
+ lpfc_ncmd->cur_iocbq.sli4_xritag,
+ lpfc_ncmd->status, lpfc_ncmd->result,
+ wcqe->total_data_placed,
+ cp->sqe.common.opcode,
+ cp->sqe.common.command_id,
+ ep->cqe.status);
+ 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 x%px "
+ "nvme cmd x%px, xri x%x, "
+ "xb %d\n",
+ lpfc_ncmd, nCmd,
+ lpfc_ncmd->cur_iocbq.sli4_xritag,
+ bf_get(lpfc_wcqe_c_xb, wcqe));
+ fallthrough;
+ default:
+out_err:
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
+ "6072 NVME Completion Error: xri %x "
+ "status x%x result x%x [x%x] "
+ "placed x%x\n",
+ lpfc_ncmd->cur_iocbq.sli4_xritag,
+ lpfc_ncmd->status, lpfc_ncmd->result,
+ wcqe->parameter,
+ wcqe->total_data_placed);
+ nCmd->transferred_length = 0;
+ nCmd->rcv_rsplen = 0;
+ nCmd->status = NVME_SC_INTERNAL;
+ offline = pci_channel_offline(vport->phba->pcidev);
+ }
+ }
+
+ /* pick up SLI4 exhange busy condition */
+ if (bf_get(lpfc_wcqe_c_xb, wcqe) && !offline)
+ 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_io = ktime_get_ns();
+ phba->ktime_last_cmd = lpfc_ncmd->ts_data_io;
+ lpfc_io_ktime(phba, lpfc_ncmd);
+ }
+ if (unlikely(phba->hdwqstat_on & LPFC_CHECK_NVME_IO)) {
+ cpu = raw_smp_processor_id();
+ this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
+ if (lpfc_ncmd->cpu != cpu)
+ lpfc_printf_vlog(vport,
+ KERN_INFO, LOG_NVME_IOERR,
+ "6701 CPU Check cmpl: "
+ "cpu %d expect %d\n",
+ cpu, 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;
+ lpfc_ncmd->nvmeCmd = NULL;
+ call_done = true;
+ }
+ spin_unlock(&lpfc_ncmd->buf_lock);
+
+ /* Check if IO qualified for CMF */
+ if (phba->cmf_active_mode != LPFC_CFG_OFF &&
+ nCmd->io_dir == NVMEFC_FCP_READ &&
+ nCmd->payload_length) {
+ /* Used when calculating average latency */
+ lat = ktime_get_ns() - lpfc_ncmd->rx_cmd_start;
+ lpfc_update_cmf_cmpl(phba, lat, nCmd->payload_length, NULL);
+ }
+
+ if (call_done)
+ nCmd->done(nCmd);
+
+ /* 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
+ * @vport: pointer to a host virtual N_Port data structure
+ * @lpfc_ncmd: Pointer to lpfc scsi command
+ * @pnode: pointer to a node-list data structure
+ * @cstat: pointer to the control status structure
+ *
+ * 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_io_buf *lpfc_ncmd,
+ struct lpfc_nodelist *pnode,
+ struct lpfc_fc4_ctrl_stat *cstat)
+{
+ struct lpfc_hba *phba = vport->phba;
+ struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
+ struct nvme_common_command *sqe;
+ struct lpfc_iocbq *pwqeq = &lpfc_ncmd->cur_iocbq;
+ union lpfc_wqe128 *wqe = &pwqeq->wqe;
+ uint32_t req_len;
+
+ /*
+ * 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;
+ }
+ cstat->output_requests++;
+ } 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;
+
+ /* For a CMF Managed port, iod must be zero'ed */
+ if (phba->cmf_active_mode == LPFC_CFG_MANAGED)
+ bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
+ LPFC_WQE_IOD_NONE);
+ cstat->input_requests++;
+ }
+ } else {
+ /* From the icmnd template, initialize words 4 - 11 */
+ memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
+ sizeof(uint32_t) * 8);
+ cstat->control_requests++;
+ }
+
+ if (pnode->nlp_nvme_info & NLP_NVME_NSLER) {
+ bf_set(wqe_erp, &wqe->generic.wqe_com, 1);
+ sqe = &((struct nvme_fc_cmd_iu *)
+ nCmd->cmdaddr)->sqe.common;
+ if (sqe->opcode == nvme_admin_async_event)
+ bf_set(wqe_ffrq, &wqe->generic.wqe_com, 1);
+ }
+
+ /*
+ * 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);
+
+ /* Word 10 */
+ bf_set(wqe_xchg, &wqe->fcp_iwrite.wqe_com, LPFC_NVME_XCHG);
+
+ /* Words 13 14 15 are for PBDE support */
+
+ /* add the VMID tags as per switch response */
+ if (unlikely(lpfc_ncmd->cur_iocbq.cmd_flag & LPFC_IO_VMID)) {
+ if (phba->pport->vmid_priority_tagging) {
+ bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1);
+ bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com,
+ lpfc_ncmd->cur_iocbq.vmid_tag.cs_ctl_vmid);
+ } else {
+ bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1);
+ bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
+ wqe->words[31] = lpfc_ncmd->cur_iocbq.vmid_tag.app_id;
+ }
+ }
+
+ pwqeq->vport = vport;
+ return 0;
+}
+
+
+/**
+ * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
+ * @vport: pointer to a host virtual N_Port data structure
+ * @lpfc_ncmd: Pointer to lpfc scsi command
+ *
+ * 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_io_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->dma_sgl;
+ struct sli4_hybrid_sgl *sgl_xtra = NULL;
+ struct scatterlist *data_sg;
+ struct sli4_sge *first_data_sgl;
+ struct ulp_bde64 *bde;
+ dma_addr_t physaddr = 0;
+ uint32_t dma_len = 0;
+ uint32_t dma_offset = 0;
+ int nseg, i, j;
+ bool lsp_just_set = false;
+
+ /* 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_TRACE_EVENT,
+ "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 tracking the segment boundaries */
+ j = 2;
+ for (i = 0; i < nseg; i++) {
+ if (data_sg == NULL) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+ "6059 dptr err %d, nseg %d\n",
+ i, nseg);
+ lpfc_ncmd->seg_cnt = 0;
+ return 1;
+ }
+
+ sgl->word2 = 0;
+ if (nseg == 1) {
+ bf_set(lpfc_sli4_sge_last, sgl, 1);
+ bf_set(lpfc_sli4_sge_type, sgl,
+ LPFC_SGE_TYPE_DATA);
+ } else {
+ bf_set(lpfc_sli4_sge_last, sgl, 0);
+
+ /* expand the segment */
+ if (!lsp_just_set &&
+ !((j + 1) % phba->border_sge_num) &&
+ ((nseg - 1) != i)) {
+ /* set LSP type */
+ bf_set(lpfc_sli4_sge_type, sgl,
+ LPFC_SGE_TYPE_LSP);
+
+ sgl_xtra = lpfc_get_sgl_per_hdwq(
+ phba, lpfc_ncmd);
+
+ if (unlikely(!sgl_xtra)) {
+ lpfc_ncmd->seg_cnt = 0;
+ return 1;
+ }
+ sgl->addr_lo = cpu_to_le32(putPaddrLow(
+ sgl_xtra->dma_phys_sgl));
+ sgl->addr_hi = cpu_to_le32(putPaddrHigh(
+ sgl_xtra->dma_phys_sgl));
+
+ } else {
+ bf_set(lpfc_sli4_sge_type, sgl,
+ LPFC_SGE_TYPE_DATA);
+ }
+ }
+
+ if (!(bf_get(lpfc_sli4_sge_type, sgl) &
+ LPFC_SGE_TYPE_LSP)) {
+ if ((nseg - 1) == i)
+ bf_set(lpfc_sli4_sge_last, sgl, 1);
+
+ physaddr = sg_dma_address(data_sg);
+ dma_len = sg_dma_len(data_sg);
+ sgl->addr_lo = cpu_to_le32(
+ putPaddrLow(physaddr));
+ sgl->addr_hi = cpu_to_le32(
+ putPaddrHigh(physaddr));
+
+ bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
+ 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++;
+
+ lsp_just_set = false;
+ } else {
+ sgl->word2 = cpu_to_le32(sgl->word2);
+
+ sgl->sge_len = cpu_to_le32(
+ phba->cfg_sg_dma_buf_size);
+
+ sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
+ i = i - 1;
+
+ lsp_just_set = true;
+ }
+
+ j++;
+ }
+
+ /* PBDE support for first data SGE only */
+ if (nseg == 1 && phba->cfg_enable_pbde) {
+ /* 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);
+
+ /* Word 11 - set PBDE bit */
+ bf_set(wqe_pbde, &wqe->generic.wqe_com, 1);
+ } else {
+ memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
+ /* Word 11 - PBDE bit disabled by default template */
+ }
+
+ } else {
+ lpfc_ncmd->seg_cnt = 0;
+
+ /* 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_TRACE_EVENT,
+ "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
+ * @pnvme_lport: Pointer to the driver's local port data
+ * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
+ * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
+ * @pnvme_fcreq: IO request from nvme fc to driver.
+ *
+ * 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, cpu;
+ struct lpfc_nvme_lport *lport;
+ struct lpfc_fc4_ctrl_stat *cstat;
+ struct lpfc_vport *vport;
+ struct lpfc_hba *phba;
+ struct lpfc_nodelist *ndlp;
+ struct lpfc_io_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;
+ uint64_t start = 0;
+#if (IS_ENABLED(CONFIG_NVME_FC))
+ u8 *uuid = NULL;
+ int err;
+ enum dma_data_direction iodir;
+#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 ((unlikely(vport->load_flag & FC_UNLOADING)) ||
+ phba->hba_flag & HBA_IOQ_FLUSH) {
+ 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) {
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
+ "6053 Busy IO, ndlp not ready: rport x%px "
+ "ndlp x%px, 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->fc4_xpt_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;
+ }
+
+ /* Check if IO qualifies for CMF */
+ if (phba->cmf_active_mode != LPFC_CFG_OFF &&
+ pnvme_fcreq->io_dir == NVMEFC_FCP_READ &&
+ pnvme_fcreq->payload_length) {
+ ret = lpfc_update_cmf_cmd(phba, pnvme_fcreq->payload_length);
+ if (ret) {
+ ret = -EBUSY;
+ goto out_fail;
+ }
+ /* Get start time for IO latency */
+ start = ktime_get_ns();
+ }
+
+ /* 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_fail1;
+ }
+ }
+
+ /* Lookup Hardware Queue index based on fcp_io_sched module parameter */
+ if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
+ idx = lpfc_queue_info->index;
+ } else {
+ cpu = raw_smp_processor_id();
+ idx = phba->sli4_hba.cpu_map[cpu].hdwq;
+ }
+
+ lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, idx, 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_fail1;
+ }
+#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
+ lpfc_ncmd->rx_cmd_start = start;
+
+ /*
+ * 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->ndlp = ndlp;
+ lpfc_ncmd->qidx = lpfc_queue_info->qidx;
+
+#if (IS_ENABLED(CONFIG_NVME_FC))
+ /* check the necessary and sufficient condition to support VMID */
+ if (lpfc_is_vmid_enabled(phba) &&
+ (ndlp->vmid_support ||
+ phba->pport->vmid_priority_tagging ==
+ LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
+ /* is the I/O generated by a VM, get the associated virtual */
+ /* entity id */
+ uuid = nvme_fc_io_getuuid(pnvme_fcreq);
+
+ if (uuid) {
+ if (pnvme_fcreq->io_dir == NVMEFC_FCP_WRITE)
+ iodir = DMA_TO_DEVICE;
+ else if (pnvme_fcreq->io_dir == NVMEFC_FCP_READ)
+ iodir = DMA_FROM_DEVICE;
+ else
+ iodir = DMA_NONE;
+
+ err = lpfc_vmid_get_appid(vport, uuid, iodir,
+ (union lpfc_vmid_io_tag *)
+ &lpfc_ncmd->cur_iocbq.vmid_tag);
+ if (!err)
+ lpfc_ncmd->cur_iocbq.cmd_flag |= LPFC_IO_VMID;
+ }
+ }
+#endif
+
+ /*
+ * 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.
+ */
+ lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
+ cstat = &phba->sli4_hba.hdwq[idx].nvme_cstat;
+
+ 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_ncmd->hdwq, &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;
+ }
+
+ if (phba->cfg_xri_rebalancing)
+ lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_ncmd->hdwq_no);
+
+#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
+ if (lpfc_ncmd->ts_cmd_start)
+ lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
+
+ if (phba->hdwqstat_on & LPFC_CHECK_NVME_IO) {
+ cpu = raw_smp_processor_id();
+ this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
+ lpfc_ncmd->cpu = cpu;
+ if (idx != cpu)
+ lpfc_printf_vlog(vport,
+ KERN_INFO, LOG_NVME_IOERR,
+ "6702 CPU Check cmd: "
+ "cpu %d wq %d\n",
+ lpfc_ncmd->cpu,
+ lpfc_queue_info->index);
+ }
+#endif
+ return 0;
+
+ out_free_nvme_buf:
+ if (lpfc_ncmd->nvmeCmd->sg_cnt) {
+ if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
+ cstat->output_requests--;
+ else
+ cstat->input_requests--;
+ } else
+ cstat->control_requests--;
+ lpfc_release_nvme_buf(phba, lpfc_ncmd);
+ out_fail1:
+ lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT,
+ pnvme_fcreq->payload_length, NULL);
+ 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_iocbq *rspiocb)
+{
+ struct lpfc_wcqe_complete *abts_cmpl = &rspiocb->wcqe_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",
+ bf_get(wqe_ctxt_tag, &cmdiocb->wqe.generic.wqe_com),
+ get_job_abtsiotag(phba, cmdiocb), 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
+ * @pnvme_lport: Pointer to the driver's local port data
+ * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
+ * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
+ * @pnvme_fcreq: IO request from nvme fc to driver.
+ *
+ * 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_io_buf *lpfc_nbuf;
+ struct lpfc_iocbq *nvmereq_wqe;
+ struct lpfc_nvme_fcpreq_priv *freqpriv;
+ unsigned long flags;
+ int ret_val;
+ struct nvme_fc_cmd_iu *cp;
+
+ /* 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 x%px\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_IOQ_FLUSH) {
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "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_TRACE_EVENT,
+ "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_TRACE_EVENT,
+ "6141 lpfc NVME IO req has no nvme_fcreq "
+ "io buffer. Skipping abort req.\n");
+ return;
+ }
+ nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
+
+ /* Guard against IO completion being called at same time */
+ spin_lock(&lpfc_nbuf->buf_lock);
+
+ /*
+ * 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) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6143 NVME req mismatch: "
+ "lpfc_nbuf x%px nvmeCmd x%px, "
+ "pnvme_fcreq x%px. Skipping Abort xri x%x\n",
+ lpfc_nbuf, lpfc_nbuf->nvmeCmd,
+ pnvme_fcreq, nvmereq_wqe->sli4_xritag);
+ goto out_unlock;
+ }
+
+ /* Don't abort IOs no longer on the pending queue. */
+ if (!(nvmereq_wqe->cmd_flag & LPFC_IO_ON_TXCMPLQ)) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6142 NVME IO req x%px not queued - skipping "
+ "abort req xri x%x\n",
+ pnvme_fcreq, nvmereq_wqe->sli4_xritag);
+ goto out_unlock;
+ }
+
+ 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->cmd_flag & LPFC_DRIVER_ABORTED) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6144 Outstanding NVME I/O Abort Request "
+ "still pending on nvme_fcreq x%px, "
+ "lpfc_ncmd x%px xri x%x\n",
+ pnvme_fcreq, lpfc_nbuf,
+ nvmereq_wqe->sli4_xritag);
+ goto out_unlock;
+ }
+
+ ret_val = lpfc_sli4_issue_abort_iotag(phba, nvmereq_wqe,
+ lpfc_nvme_abort_fcreq_cmpl);
+
+ spin_unlock(&lpfc_nbuf->buf_lock);
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+
+ /* Make sure HBA is alive */
+ lpfc_issue_hb_tmo(phba);
+
+ if (ret_val != WQE_SUCCESS) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6137 Failed abts issue_wqe with status x%x "
+ "for nvme_fcreq x%px.\n",
+ ret_val, pnvme_fcreq);
+ return;
+ }
+
+ /*
+ * 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 *)lpfc_nbuf->nvmeCmd->cmdaddr;
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
+ "6138 Transport Abort NVME Request Issued for "
+ "ox_id x%x nvme opcode x%x nvme cmd_id x%x\n",
+ nvmereq_wqe->sli4_xritag, cp->sqe.common.opcode,
+ cp->sqe.common.command_id);
+ return;
+
+out_unlock:
+ spin_unlock(&lpfc_nbuf->buf_lock);
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+ return;
+}
+
+/* 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,
+ .xmt_ls_rsp = lpfc_nvme_xmt_ls_rsp,
+
+ .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_get_nvme_buf - Get a nvme buffer from io_buf_list of the HBA
+ *
+ * This routine removes a nvme buffer from head of @hdwq io_buf_list
+ * and returns to caller.
+ *
+ * Return codes:
+ * NULL - Error
+ * Pointer to lpfc_nvme_buf - Success
+ **/
+static struct lpfc_io_buf *
+lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
+ int idx, int expedite)
+{
+ struct lpfc_io_buf *lpfc_ncmd;
+ struct lpfc_sli4_hdw_queue *qp;
+ struct sli4_sge *sgl;
+ struct lpfc_iocbq *pwqeq;
+ union lpfc_wqe128 *wqe;
+
+ lpfc_ncmd = lpfc_get_io_buf(phba, NULL, idx, expedite);
+
+ if (lpfc_ncmd) {
+ pwqeq = &(lpfc_ncmd->cur_iocbq);
+ wqe = &pwqeq->wqe;
+
+ /* Setup key fields in buffer that may have been changed
+ * if other protocols used this buffer.
+ */
+ pwqeq->cmd_flag = LPFC_IO_NVME;
+ pwqeq->cmd_cmpl = lpfc_nvme_io_cmd_cmpl;
+ lpfc_ncmd->start_time = jiffies;
+ lpfc_ncmd->flags = 0;
+
+ /* 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.
+ */
+ sgl = lpfc_ncmd->dma_sgl;
+ 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 */
+
+ /* Initialize 64 bytes only */
+ memset(wqe, 0, sizeof(union lpfc_wqe));
+
+ if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
+ atomic_inc(&ndlp->cmd_pending);
+ lpfc_ncmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
+ }
+
+ } else {
+ qp = &phba->sli4_hba.hdwq[idx];
+ qp->empty_io_bufs++;
+ }
+
+ 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_io_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_io_buf *lpfc_ncmd)
+{
+ struct lpfc_sli4_hdw_queue *qp;
+ unsigned long iflag = 0;
+
+ if ((lpfc_ncmd->flags & LPFC_SBUF_BUMP_QDEPTH) && lpfc_ncmd->ndlp)
+ atomic_dec(&lpfc_ncmd->ndlp->cmd_pending);
+
+ lpfc_ncmd->ndlp = NULL;
+ lpfc_ncmd->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
+
+ qp = lpfc_ncmd->hdwq;
+ if (unlikely(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(&qp->abts_io_buf_list_lock, iflag);
+ list_add_tail(&lpfc_ncmd->list,
+ &qp->lpfc_abts_io_buf_list);
+ qp->abts_nvme_io_bufs++;
+ spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
+ } else
+ lpfc_release_io_buf(phba, (struct lpfc_io_buf *)lpfc_ncmd, qp);
+}
+
+/**
+ * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
+ * @vport: 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;
+
+ /* 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);
+
+ /* We need to tell the transport layer + 1 because it takes page
+ * alignment into account. When space for the SGL is allocated we
+ * allocate + 3, one for cmd, one for rsp and one for this alignment
+ */
+ lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
+
+ /* Advertise how many hw queues we support based on cfg_hdw_queue,
+ * which will not exceed cpu count.
+ */
+ lpfc_nvme_template.max_hw_queues = phba->cfg_hdw_queue;
+
+ if (!IS_ENABLED(CONFIG_NVME_FC))
+ return ret;
+
+ /* localport is allocated from the stack, but the registration
+ * call allocates heap memory as well as the private area.
+ */
+
+ ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
+ &vport->phba->pcidev->dev, &localport);
+ if (!ret) {
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
+ "6005 Successfully registered local "
+ "NVME port num %d, localP x%px, private "
+ "x%px, 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;
+ 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);
+ }
+
+ return ret;
+}
+
+#if (IS_ENABLED(CONFIG_NVME_FC))
+/* 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.
+ */
+static void
+lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
+ struct lpfc_nvme_lport *lport,
+ struct completion *lport_unreg_cmp)
+{
+ u32 wait_tmo;
+ int ret, i, pending = 0;
+ struct lpfc_sli_ring *pring;
+ struct lpfc_hba *phba = vport->phba;
+ struct lpfc_sli4_hdw_queue *qp;
+ int abts_scsi, abts_nvme;
+
+ /* 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_unreg_cmp, wait_tmo);
+ if (unlikely(!ret)) {
+ pending = 0;
+ abts_scsi = 0;
+ abts_nvme = 0;
+ for (i = 0; i < phba->cfg_hdw_queue; i++) {
+ qp = &phba->sli4_hba.hdwq[i];
+ if (!vport->localport || !qp || !qp->io_wq)
+ return;
+
+ pring = qp->io_wq->pring;
+ if (!pring)
+ continue;
+ pending += pring->txcmplq_cnt;
+ abts_scsi += qp->abts_scsi_io_bufs;
+ abts_nvme += qp->abts_nvme_io_bufs;
+ }
+ if (!vport->localport ||
+ test_bit(HBA_PCI_ERR, &vport->phba->bit_flags) ||
+ vport->load_flag & FC_UNLOADING)
+ return;
+
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "6176 Lport x%px Localport x%px wait "
+ "timed out. Pending %d [%d:%d]. "
+ "Renewing.\n",
+ lport, vport->localport, pending,
+ abts_scsi, abts_nvme);
+ continue;
+ }
+ break;
+ }
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
+ "6177 Lport x%px Localport x%px Complete Success\n",
+ lport, vport->localport);
+}
+#endif
+
+/**
+ * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
+ * @vport: pointer to a host virtual N_Port 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;
+ int ret;
+ DECLARE_COMPLETION_ONSTACK(lport_unreg_cmp);
+
+ if (vport->nvmei_support == 0)
+ return;
+
+ localport = vport->localport;
+ if (!localport)
+ return;
+ lport = (struct lpfc_nvme_lport *)localport->private;
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
+ "6011 Destroying NVME localport x%px\n",
+ localport);
+
+ /* lport's rport list is clear. Unregister
+ * lport and release resources.
+ */
+ lport->lport_unreg_cmp = &lport_unreg_cmp;
+ ret = nvme_fc_unregister_localport(localport);
+
+ /* Wait for completion. This either blocks
+ * indefinitely or succeeds
+ */
+ lpfc_nvme_lport_unreg_wait(vport, lport, &lport_unreg_cmp);
+ vport->localport = NULL;
+
+ /* 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 x%px, No lport\n",
+ localport);
+ return;
+ }
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
+ "6012 Update NVME lport x%px 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 x%px 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;
+ struct fc_rport *srport = ndlp->rport;
+
+ 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);
+ if (srport)
+ rpinfo.dev_loss_tmo = srport->dev_loss_tmo;
+ else
+ rpinfo.dev_loss_tmo = vport->cfg_devloss_tmo;
+
+ spin_lock_irq(&ndlp->lock);
+
+ /* If an oldrport exists, so does the ndlp reference. If not
+ * a new reference is needed because either the node has never
+ * been registered or it's been unregistered and getting deleted.
+ */
+ oldrport = lpfc_ndlp_get_nrport(ndlp);
+ if (oldrport) {
+ prev_ndlp = oldrport->ndlp;
+ spin_unlock_irq(&ndlp->lock);
+ } else {
+ spin_unlock_irq(&ndlp->lock);
+ if (!lpfc_nlp_get(ndlp)) {
+ dev_warn(&vport->phba->pcidev->dev,
+ "Warning - No node ref - exit register\n");
+ return 0;
+ }
+ }
+
+ 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(&ndlp->lock);
+ ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
+ ndlp->fc4_xpt_flags |= NVME_XPT_REGD;
+ spin_unlock_irq(&ndlp->lock);
+ rport = remote_port->private;
+ if (oldrport) {
+
+ /* Sever the ndlp<->rport association
+ * before dropping the ndlp ref from
+ * register.
+ */
+ spin_lock_irq(&ndlp->lock);
+ ndlp->nrport = NULL;
+ ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
+ spin_unlock_irq(&ndlp->lock);
+ 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 (!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(&ndlp->lock);
+ ndlp->nrport = rport;
+ spin_unlock_irq(&ndlp->lock);
+ lpfc_printf_vlog(vport, KERN_INFO,
+ LOG_NVME_DISC | LOG_NODE,
+ "6022 Bind lport x%px to remoteport x%px "
+ "rport x%px WWNN 0x%llx, "
+ "Rport WWPN 0x%llx DID "
+ "x%06x Role x%x, ndlp %p prev_ndlp x%px\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_TRACE_EVENT,
+ "6031 RemotePort Registration failed "
+ "err: %d, DID x%06x\n",
+ ret, ndlp->nlp_DID);
+ }
+
+ return ret;
+#else
+ return 0;
+#endif
+}
+
+/*
+ * lpfc_nvme_rescan_port - Check to see if we should rescan this remoteport
+ *
+ * If the ndlp represents an NVME Target, that we are logged into,
+ * ping the NVME FC Transport layer to initiate a device rescan
+ * on this remote NPort.
+ */
+void
+lpfc_nvme_rescan_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+#if (IS_ENABLED(CONFIG_NVME_FC))
+ struct lpfc_nvme_rport *nrport;
+ struct nvme_fc_remote_port *remoteport = NULL;
+
+ spin_lock_irq(&ndlp->lock);
+ nrport = lpfc_ndlp_get_nrport(ndlp);
+ if (nrport)
+ remoteport = nrport->remoteport;
+ spin_unlock_irq(&ndlp->lock);
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+ "6170 Rescan NPort DID x%06x type x%x "
+ "state x%x nrport x%px remoteport x%px\n",
+ ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_state,
+ nrport, remoteport);
+
+ if (!nrport || !remoteport)
+ goto rescan_exit;
+
+ /* Rescan an NVME target in MAPPED state with DISCOVERY role set */
+ if (remoteport->port_role & FC_PORT_ROLE_NVME_DISCOVERY &&
+ ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
+ nvme_fc_rescan_remoteport(remoteport);
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+ "6172 NVME rescanned DID x%06x "
+ "port_state x%x\n",
+ ndlp->nlp_DID, remoteport->port_state);
+ }
+ return;
+ rescan_exit:
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+ "6169 Skip NVME Rport Rescan, NVME remoteport "
+ "unregistered\n");
+#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 = NULL;
+
+ 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;
+
+ spin_lock_irq(&ndlp->lock);
+ rport = lpfc_ndlp_get_nrport(ndlp);
+ if (rport)
+ remoteport = rport->remoteport;
+ spin_unlock_irq(&ndlp->lock);
+ if (!remoteport)
+ goto input_err;
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+ "6033 Unreg nvme remoteport x%px, portname x%llx, "
+ "port_id x%06x, portstate x%x port type x%x "
+ "refcnt %d\n",
+ remoteport, remoteport->port_name,
+ remoteport->port_id, remoteport->port_state,
+ ndlp->nlp_type, kref_read(&ndlp->kref));
+
+ /* 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.
+ */
+ spin_lock_irq(&vport->phba->hbalock);
+ ndlp->fc4_xpt_flags |= NVME_XPT_UNREG_WAIT;
+ spin_unlock_irq(&vport->phba->hbalock);
+
+ /* 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);
+
+ /* The driver no longer knows if the nrport memory is valid.
+ * because the controller teardown process has begun and
+ * is asynchronous. Break the binding in the ndlp. Also
+ * remove the register ndlp reference to setup node release.
+ */
+ ndlp->nrport = NULL;
+ lpfc_nlp_put(ndlp);
+ if (ret != 0) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+ "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_TRACE_EVENT,
+ "6168 State error: lport x%px, rport x%px FCID x%06x\n",
+ vport->localport, ndlp->rport, ndlp->nlp_DID);
+}
+
+/**
+ * lpfc_sli4_nvme_pci_offline_aborted - Fast-path process of NVME xri abort
+ * @phba: pointer to lpfc hba data structure.
+ * @lpfc_ncmd: The nvme job structure for the request being aborted.
+ *
+ * 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_pci_offline_aborted(struct lpfc_hba *phba,
+ struct lpfc_io_buf *lpfc_ncmd)
+{
+ struct nvmefc_fcp_req *nvme_cmd = NULL;
+
+ lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
+ "6533 %s nvme_cmd %p tag x%x abort complete and "
+ "xri released\n", __func__,
+ lpfc_ncmd->nvmeCmd,
+ 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->transferred_length = 0;
+ nvme_cmd->rcv_rsplen = 0;
+ nvme_cmd->status = NVME_SC_INTERNAL;
+ nvme_cmd->done(nvme_cmd);
+ lpfc_ncmd->nvmeCmd = NULL;
+ }
+ lpfc_release_nvme_buf(phba, lpfc_ncmd);
+}
+
+/**
+ * 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.
+ * @lpfc_ncmd: The nvme job structure for the request being aborted.
+ *
+ * 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,
+ struct lpfc_io_buf *lpfc_ncmd)
+{
+ uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
+ struct nvmefc_fcp_req *nvme_cmd = NULL;
+ struct lpfc_nodelist *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);
+}
+
+/**
+ * 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.hdwq)
+ return;
+
+ /* Cycle through all IO rings and make sure all outstanding
+ * WQEs have been removed from the txcmplqs.
+ */
+ for (i = 0; i < phba->cfg_hdw_queue; i++) {
+ if (!phba->sli4_hba.hdwq[i].io_wq)
+ continue;
+ pring = phba->sli4_hba.hdwq[i].io_wq->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_TRACE_EVENT,
+ "6178 NVME IO not empty, "
+ "cnt %d\n", wait_cnt);
+ }
+ }
+ }
+
+ /* Make sure HBA is alive */
+ lpfc_issue_hb_tmo(phba);
+
+}
+
+void
+lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
+ uint32_t stat, uint32_t param)
+{
+#if (IS_ENABLED(CONFIG_NVME_FC))
+ struct lpfc_io_buf *lpfc_ncmd;
+ struct nvmefc_fcp_req *nCmd;
+ struct lpfc_wcqe_complete wcqe;
+ struct lpfc_wcqe_complete *wcqep = &wcqe;
+
+ lpfc_ncmd = pwqeIn->io_buf;
+ if (!lpfc_ncmd) {
+ lpfc_sli_release_iocbq(phba, pwqeIn);
+ return;
+ }
+ /* For abort iocb just return, IO iocb will do a done call */
+ if (bf_get(wqe_cmnd, &pwqeIn->wqe.gen_req.wqe_com) ==
+ CMD_ABORT_XRI_CX) {
+ lpfc_sli_release_iocbq(phba, pwqeIn);
+ return;
+ }
+
+ spin_lock(&lpfc_ncmd->buf_lock);
+ nCmd = lpfc_ncmd->nvmeCmd;
+ if (!nCmd) {
+ spin_unlock(&lpfc_ncmd->buf_lock);
+ lpfc_release_nvme_buf(phba, lpfc_ncmd);
+ return;
+ }
+ spin_unlock(&lpfc_ncmd->buf_lock);
+
+ lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
+ "6194 NVME Cancel xri %x\n",
+ lpfc_ncmd->cur_iocbq.sli4_xritag);
+
+ wcqep->word0 = 0;
+ bf_set(lpfc_wcqe_c_status, wcqep, stat);
+ wcqep->parameter = param;
+ wcqep->total_data_placed = 0;
+ wcqep->word3 = 0; /* xb is 0 */
+
+ /* Call release with XB=1 to queue the IO into the abort list. */
+ if (phba->sli.sli_flag & LPFC_SLI_ACTIVE)
+ bf_set(lpfc_wcqe_c_xb, wcqep, 1);
+
+ memcpy(&pwqeIn->wcqe_cmpl, wcqep, sizeof(*wcqep));
+ (pwqeIn->cmd_cmpl)(phba, pwqeIn, pwqeIn);
+#endif
+}