diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_nvme.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvme.c | 2846 |
1 files changed, 2846 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..96e11a26c --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_nvme.c @@ -0,0 +1,2846 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Fibre Channel Host Bus Adapters. * + * Copyright (C) 2017-2023 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 (!(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; + int 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_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) { + if (status != CQE_STATUS_SUCCESS) + status = -ENXIO; + 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); + + 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_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; + + /* 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); + + lpfc_nbuf = freqpriv->nvme_buf; + if (!lpfc_nbuf) { + 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) { + 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; + } + + /* Guard against IO completion being called at same time */ + spin_lock_irqsave(&lpfc_nbuf->buf_lock, flags); + + /* If the hba is getting reset, this flag is set. It is + * cleared when the reset is complete and rings reestablished. + */ + spin_lock(&phba->hbalock); + /* driver queued commands are in process of being flushed */ + if (phba->hba_flag & HBA_IOQ_FLUSH) { + spin_unlock(&phba->hbalock); + spin_unlock_irqrestore(&lpfc_nbuf->buf_lock, 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; + } + + 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) { + 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(&phba->hbalock); + spin_unlock_irqrestore(&lpfc_nbuf->buf_lock, 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; + } + + lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS, + "6138 Transport Abort NVME Request Issued for " + "ox_id x%x\n", + nvmereq_wqe->sli4_xritag); + return; + +out_unlock: + spin_unlock(&phba->hbalock); + spin_unlock_irqrestore(&lpfc_nbuf->buf_lock, 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) || + phba->link_state == LPFC_HBA_ERROR || + 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 ref %u\n", + ret, ndlp->nlp_DID, kref_read(&ndlp->kref)); + lpfc_nlp_put(ndlp); + } + + 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. + */ +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 || + unlikely(vport->phba->link_state == LPFC_HBA_ERROR)) + (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); + + if (vport->load_flag & FC_UNLOADING) { + /* Only 1 thread can drop the initial node + * reference. Check if another thread has set + * NLP_DROPPED. + */ + spin_lock_irq(&ndlp->lock); + if (!(ndlp->nlp_flag & NLP_DROPPED)) { + ndlp->nlp_flag |= NLP_DROPPED; + spin_unlock_irq(&ndlp->lock); + lpfc_nlp_put(ndlp); + return; + } + spin_unlock_irq(&ndlp->lock); + } + } + } + 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 +} |