diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 6801 |
1 files changed, 6801 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c new file mode 100644 index 0000000000..d26941b131 --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -0,0 +1,6801 @@ +/******************************************************************* + * 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/export.h> +#include <linux/delay.h> +#include <asm/unaligned.h> +#include <linux/t10-pi.h> +#include <linux/crc-t10dif.h> +#include <linux/blk-cgroup.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 "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_scsi.h" +#include "lpfc_logmsg.h" +#include "lpfc_crtn.h" +#include "lpfc_vport.h" + +#define LPFC_RESET_WAIT 2 +#define LPFC_ABORT_WAIT 2 + +static char *dif_op_str[] = { + "PROT_NORMAL", + "PROT_READ_INSERT", + "PROT_WRITE_STRIP", + "PROT_READ_STRIP", + "PROT_WRITE_INSERT", + "PROT_READ_PASS", + "PROT_WRITE_PASS", +}; + +struct scsi_dif_tuple { + __be16 guard_tag; /* Checksum */ + __be16 app_tag; /* Opaque storage */ + __be32 ref_tag; /* Target LBA or indirect LBA */ +}; + +static struct lpfc_rport_data * +lpfc_rport_data_from_scsi_device(struct scsi_device *sdev) +{ + struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata; + + if (vport->phba->cfg_fof) + return ((struct lpfc_device_data *)sdev->hostdata)->rport_data; + else + return (struct lpfc_rport_data *)sdev->hostdata; +} + +static void +lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb); +static void +lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb); +static int +lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc); + +/** + * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. + * @phba: Pointer to HBA object. + * @lpfc_cmd: lpfc scsi command object pointer. + * + * This function is called from the lpfc_prep_task_mgmt_cmd function to + * set the last bit in the response sge entry. + **/ +static void +lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, + struct lpfc_io_buf *lpfc_cmd) +{ + struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl; + if (sgl) { + sgl += 1; + sgl->word2 = le32_to_cpu(sgl->word2); + bf_set(lpfc_sli4_sge_last, sgl, 1); + sgl->word2 = cpu_to_le32(sgl->word2); + } +} + +/** + * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread + * @phba: The Hba for which this call is being executed. + * + * This routine is called when there is resource error in driver or firmware. + * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine + * posts at most 1 event each second. This routine wakes up worker thread of + * @phba to process WORKER_RAM_DOWN_EVENT event. + * + * This routine should be called with no lock held. + **/ +void +lpfc_rampdown_queue_depth(struct lpfc_hba *phba) +{ + unsigned long flags; + uint32_t evt_posted; + unsigned long expires; + + spin_lock_irqsave(&phba->hbalock, flags); + atomic_inc(&phba->num_rsrc_err); + phba->last_rsrc_error_time = jiffies; + + expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL; + if (time_after(expires, jiffies)) { + spin_unlock_irqrestore(&phba->hbalock, flags); + return; + } + + phba->last_ramp_down_time = jiffies; + + spin_unlock_irqrestore(&phba->hbalock, flags); + + spin_lock_irqsave(&phba->pport->work_port_lock, flags); + evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; + if (!evt_posted) + phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; + spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); + + if (!evt_posted) + lpfc_worker_wake_up(phba); + return; +} + +/** + * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler + * @phba: The Hba for which this call is being executed. + * + * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker + * thread.This routine reduces queue depth for all scsi device on each vport + * associated with @phba. + **/ +void +lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) +{ + struct lpfc_vport **vports; + struct Scsi_Host *shost; + struct scsi_device *sdev; + unsigned long new_queue_depth; + unsigned long num_rsrc_err, num_cmd_success; + int i; + + num_rsrc_err = atomic_read(&phba->num_rsrc_err); + num_cmd_success = atomic_read(&phba->num_cmd_success); + + /* + * The error and success command counters are global per + * driver instance. If another handler has already + * operated on this error event, just exit. + */ + if (num_rsrc_err == 0) + return; + + vports = lpfc_create_vport_work_array(phba); + if (vports != NULL) + for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { + shost = lpfc_shost_from_vport(vports[i]); + shost_for_each_device(sdev, shost) { + new_queue_depth = + sdev->queue_depth * num_rsrc_err / + (num_rsrc_err + num_cmd_success); + if (!new_queue_depth) + new_queue_depth = sdev->queue_depth - 1; + else + new_queue_depth = sdev->queue_depth - + new_queue_depth; + scsi_change_queue_depth(sdev, new_queue_depth); + } + } + lpfc_destroy_vport_work_array(phba, vports); + atomic_set(&phba->num_rsrc_err, 0); + atomic_set(&phba->num_cmd_success, 0); +} + +/** + * lpfc_scsi_dev_block - set all scsi hosts to block state + * @phba: Pointer to HBA context object. + * + * This function walks vport list and set each SCSI host to block state + * by invoking fc_remote_port_delete() routine. This function is invoked + * with EEH when device's PCI slot has been permanently disabled. + **/ +void +lpfc_scsi_dev_block(struct lpfc_hba *phba) +{ + struct lpfc_vport **vports; + struct Scsi_Host *shost; + struct scsi_device *sdev; + struct fc_rport *rport; + int i; + + vports = lpfc_create_vport_work_array(phba); + if (vports != NULL) + for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { + shost = lpfc_shost_from_vport(vports[i]); + shost_for_each_device(sdev, shost) { + rport = starget_to_rport(scsi_target(sdev)); + fc_remote_port_delete(rport); + } + } + lpfc_destroy_vport_work_array(phba, vports); +} + +/** + * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec + * @vport: The virtual port for which this call being executed. + * @num_to_alloc: The requested number of buffers to allocate. + * + * This routine allocates a scsi buffer for device with SLI-3 interface spec, + * the scsi buffer contains all the necessary information needed to initiate + * a SCSI I/O. The non-DMAable buffer region contains information to build + * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, + * and the initial BPL. In addition to allocating memory, the FCP CMND and + * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. + * + * Return codes: + * int - number of scsi buffers that were allocated. + * 0 = failure, less than num_to_alloc is a partial failure. + **/ +static int +lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) +{ + struct lpfc_hba *phba = vport->phba; + struct lpfc_io_buf *psb; + struct ulp_bde64 *bpl; + IOCB_t *iocb; + dma_addr_t pdma_phys_fcp_cmd; + dma_addr_t pdma_phys_fcp_rsp; + dma_addr_t pdma_phys_sgl; + uint16_t iotag; + int bcnt, bpl_size; + + bpl_size = phba->cfg_sg_dma_buf_size - + (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); + + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", + num_to_alloc, phba->cfg_sg_dma_buf_size, + (int)sizeof(struct fcp_cmnd), + (int)sizeof(struct fcp_rsp), bpl_size); + + for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { + psb = kzalloc(sizeof(struct lpfc_io_buf), GFP_KERNEL); + if (!psb) + break; + + /* + * Get memory from the pci pool to map the virt space to pci + * bus space for an I/O. The DMA buffer includes space for the + * struct fcp_cmnd, struct fcp_rsp and the number of bde's + * necessary to support the sg_tablesize. + */ + psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool, + GFP_KERNEL, &psb->dma_handle); + if (!psb->data) { + kfree(psb); + break; + } + + + /* Allocate iotag for psb->cur_iocbq. */ + iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); + if (iotag == 0) { + dma_pool_free(phba->lpfc_sg_dma_buf_pool, + psb->data, psb->dma_handle); + kfree(psb); + break; + } + psb->cur_iocbq.cmd_flag |= LPFC_IO_FCP; + + psb->fcp_cmnd = psb->data; + psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); + psb->dma_sgl = psb->data + sizeof(struct fcp_cmnd) + + sizeof(struct fcp_rsp); + + /* Initialize local short-hand pointers. */ + bpl = (struct ulp_bde64 *)psb->dma_sgl; + pdma_phys_fcp_cmd = psb->dma_handle; + pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); + pdma_phys_sgl = psb->dma_handle + sizeof(struct fcp_cmnd) + + sizeof(struct fcp_rsp); + + /* + * The first two bdes are the FCP_CMD and FCP_RSP. The balance + * are sg list bdes. Initialize the first two and leave the + * rest for queuecommand. + */ + bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); + bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); + bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); + bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; + bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); + + /* Setup the physical region for the FCP RSP */ + bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); + bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); + bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); + bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; + bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); + + /* + * Since the IOCB for the FCP I/O is built into this + * lpfc_scsi_buf, initialize it with all known data now. + */ + iocb = &psb->cur_iocbq.iocb; + iocb->un.fcpi64.bdl.ulpIoTag32 = 0; + if ((phba->sli_rev == 3) && + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { + /* fill in immediate fcp command BDE */ + iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; + iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); + iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, + unsli3.fcp_ext.icd); + iocb->un.fcpi64.bdl.addrHigh = 0; + iocb->ulpBdeCount = 0; + iocb->ulpLe = 0; + /* fill in response BDE */ + iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = + BUFF_TYPE_BDE_64; + iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = + sizeof(struct fcp_rsp); + iocb->unsli3.fcp_ext.rbde.addrLow = + putPaddrLow(pdma_phys_fcp_rsp); + iocb->unsli3.fcp_ext.rbde.addrHigh = + putPaddrHigh(pdma_phys_fcp_rsp); + } else { + iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; + iocb->un.fcpi64.bdl.bdeSize = + (2 * sizeof(struct ulp_bde64)); + iocb->un.fcpi64.bdl.addrLow = + putPaddrLow(pdma_phys_sgl); + iocb->un.fcpi64.bdl.addrHigh = + putPaddrHigh(pdma_phys_sgl); + iocb->ulpBdeCount = 1; + iocb->ulpLe = 1; + } + iocb->ulpClass = CLASS3; + psb->status = IOSTAT_SUCCESS; + /* Put it back into the SCSI buffer list */ + psb->cur_iocbq.io_buf = psb; + spin_lock_init(&psb->buf_lock); + lpfc_release_scsi_buf_s3(phba, psb); + + } + + return bcnt; +} + +/** + * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport + * @vport: pointer to lpfc vport data structure. + * + * This routine is invoked by the vport cleanup for deletions and the cleanup + * for an ndlp on removal. + **/ +void +lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) +{ + struct lpfc_hba *phba = vport->phba; + struct lpfc_io_buf *psb, *next_psb; + struct lpfc_sli4_hdw_queue *qp; + unsigned long iflag = 0; + int idx; + + if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP)) + return; + + spin_lock_irqsave(&phba->hbalock, iflag); + for (idx = 0; idx < phba->cfg_hdw_queue; idx++) { + qp = &phba->sli4_hba.hdwq[idx]; + + spin_lock(&qp->abts_io_buf_list_lock); + list_for_each_entry_safe(psb, next_psb, + &qp->lpfc_abts_io_buf_list, list) { + if (psb->cur_iocbq.cmd_flag & LPFC_IO_NVME) + continue; + + if (psb->rdata && psb->rdata->pnode && + psb->rdata->pnode->vport == vport) + psb->rdata = NULL; + } + spin_unlock(&qp->abts_io_buf_list_lock); + } + spin_unlock_irqrestore(&phba->hbalock, iflag); +} + +/** + * lpfc_sli4_io_xri_aborted - Fast-path process of fcp xri abort + * @phba: pointer to lpfc hba data structure. + * @axri: pointer to the fcp xri abort wcqe structure. + * @idx: index into hdwq + * + * This routine is invoked by the worker thread to process a SLI4 fast-path + * FCP or NVME aborted xri. + **/ +void +lpfc_sli4_io_xri_aborted(struct lpfc_hba *phba, + struct sli4_wcqe_xri_aborted *axri, int idx) +{ + u16 xri = 0; + u16 rxid = 0; + struct lpfc_io_buf *psb, *next_psb; + struct lpfc_sli4_hdw_queue *qp; + unsigned long iflag = 0; + struct lpfc_iocbq *iocbq; + int i; + struct lpfc_nodelist *ndlp; + int rrq_empty = 0; + struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring; + struct scsi_cmnd *cmd; + int offline = 0; + + if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP)) + return; + offline = pci_channel_offline(phba->pcidev); + if (!offline) { + xri = bf_get(lpfc_wcqe_xa_xri, axri); + rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); + } + qp = &phba->sli4_hba.hdwq[idx]; + spin_lock_irqsave(&phba->hbalock, iflag); + spin_lock(&qp->abts_io_buf_list_lock); + list_for_each_entry_safe(psb, next_psb, + &qp->lpfc_abts_io_buf_list, list) { + if (offline) + xri = psb->cur_iocbq.sli4_xritag; + if (psb->cur_iocbq.sli4_xritag == xri) { + list_del_init(&psb->list); + psb->flags &= ~LPFC_SBUF_XBUSY; + psb->status = IOSTAT_SUCCESS; + if (psb->cur_iocbq.cmd_flag & LPFC_IO_NVME) { + qp->abts_nvme_io_bufs--; + spin_unlock(&qp->abts_io_buf_list_lock); + spin_unlock_irqrestore(&phba->hbalock, iflag); + if (!offline) { + lpfc_sli4_nvme_xri_aborted(phba, axri, + psb); + return; + } + lpfc_sli4_nvme_pci_offline_aborted(phba, psb); + spin_lock_irqsave(&phba->hbalock, iflag); + spin_lock(&qp->abts_io_buf_list_lock); + continue; + } + qp->abts_scsi_io_bufs--; + spin_unlock(&qp->abts_io_buf_list_lock); + + if (psb->rdata && psb->rdata->pnode) + ndlp = psb->rdata->pnode; + else + ndlp = NULL; + + rrq_empty = list_empty(&phba->active_rrq_list); + spin_unlock_irqrestore(&phba->hbalock, iflag); + if (ndlp && !offline) { + lpfc_set_rrq_active(phba, ndlp, + psb->cur_iocbq.sli4_lxritag, rxid, 1); + lpfc_sli4_abts_err_handler(phba, ndlp, axri); + } + + if (phba->cfg_fcp_wait_abts_rsp || offline) { + spin_lock_irqsave(&psb->buf_lock, iflag); + cmd = psb->pCmd; + psb->pCmd = NULL; + spin_unlock_irqrestore(&psb->buf_lock, iflag); + + /* The sdev is not guaranteed to be valid post + * scsi_done upcall. + */ + if (cmd) + scsi_done(cmd); + + /* + * We expect there is an abort thread waiting + * for command completion wake up the thread. + */ + spin_lock_irqsave(&psb->buf_lock, iflag); + psb->cur_iocbq.cmd_flag &= + ~LPFC_DRIVER_ABORTED; + if (psb->waitq) + wake_up(psb->waitq); + spin_unlock_irqrestore(&psb->buf_lock, iflag); + } + + lpfc_release_scsi_buf_s4(phba, psb); + if (rrq_empty) + lpfc_worker_wake_up(phba); + if (!offline) + return; + spin_lock_irqsave(&phba->hbalock, iflag); + spin_lock(&qp->abts_io_buf_list_lock); + continue; + } + } + spin_unlock(&qp->abts_io_buf_list_lock); + if (!offline) { + for (i = 1; i <= phba->sli.last_iotag; i++) { + iocbq = phba->sli.iocbq_lookup[i]; + + if (!(iocbq->cmd_flag & LPFC_IO_FCP) || + (iocbq->cmd_flag & LPFC_IO_LIBDFC)) + continue; + if (iocbq->sli4_xritag != xri) + continue; + psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq); + psb->flags &= ~LPFC_SBUF_XBUSY; + spin_unlock_irqrestore(&phba->hbalock, iflag); + if (!list_empty(&pring->txq)) + lpfc_worker_wake_up(phba); + return; + } + } + spin_unlock_irqrestore(&phba->hbalock, iflag); +} + +/** + * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA + * @phba: The HBA for which this call is being executed. + * @ndlp: pointer to a node-list data structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list + * and returns to caller. + * + * Return codes: + * NULL - Error + * Pointer to lpfc_scsi_buf - Success + **/ +static struct lpfc_io_buf * +lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, + struct scsi_cmnd *cmnd) +{ + struct lpfc_io_buf *lpfc_cmd = NULL; + struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get; + unsigned long iflag = 0; + + spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); + list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_io_buf, + list); + if (!lpfc_cmd) { + spin_lock(&phba->scsi_buf_list_put_lock); + list_splice(&phba->lpfc_scsi_buf_list_put, + &phba->lpfc_scsi_buf_list_get); + INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); + list_remove_head(scsi_buf_list_get, lpfc_cmd, + struct lpfc_io_buf, list); + spin_unlock(&phba->scsi_buf_list_put_lock); + } + spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); + + if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) { + atomic_inc(&ndlp->cmd_pending); + lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH; + } + return lpfc_cmd; +} +/** + * lpfc_get_scsi_buf_s4 - Get a scsi buffer from io_buf_list of the HBA + * @phba: The HBA for which this call is being executed. + * @ndlp: pointer to a node-list data structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine removes a scsi buffer from head of @hdwq io_buf_list + * and returns to caller. + * + * Return codes: + * NULL - Error + * Pointer to lpfc_scsi_buf - Success + **/ +static struct lpfc_io_buf * +lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, + struct scsi_cmnd *cmnd) +{ + struct lpfc_io_buf *lpfc_cmd; + struct lpfc_sli4_hdw_queue *qp; + struct sli4_sge *sgl; + dma_addr_t pdma_phys_fcp_rsp; + dma_addr_t pdma_phys_fcp_cmd; + uint32_t cpu, idx; + int tag; + struct fcp_cmd_rsp_buf *tmp = NULL; + + cpu = raw_smp_processor_id(); + if (cmnd && phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) { + tag = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); + idx = blk_mq_unique_tag_to_hwq(tag); + } else { + idx = phba->sli4_hba.cpu_map[cpu].hdwq; + } + + lpfc_cmd = lpfc_get_io_buf(phba, ndlp, idx, + !phba->cfg_xri_rebalancing); + if (!lpfc_cmd) { + qp = &phba->sli4_hba.hdwq[idx]; + qp->empty_io_bufs++; + return NULL; + } + + /* Setup key fields in buffer that may have been changed + * if other protocols used this buffer. + */ + lpfc_cmd->cur_iocbq.cmd_flag = LPFC_IO_FCP; + lpfc_cmd->prot_seg_cnt = 0; + lpfc_cmd->seg_cnt = 0; + lpfc_cmd->timeout = 0; + lpfc_cmd->flags = 0; + lpfc_cmd->start_time = jiffies; + lpfc_cmd->waitq = NULL; + lpfc_cmd->cpu = cpu; +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + lpfc_cmd->prot_data_type = 0; +#endif + tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd); + if (!tmp) { + lpfc_release_io_buf(phba, lpfc_cmd, lpfc_cmd->hdwq); + return NULL; + } + + lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd; + lpfc_cmd->fcp_rsp = tmp->fcp_rsp; + + /* + * The first two SGEs are the FCP_CMD and FCP_RSP. + * The balance are sg list bdes. Initialize the + * first two and leave the rest for queuecommand. + */ + sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl; + pdma_phys_fcp_cmd = tmp->fcp_cmd_rsp_dma_handle; + sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); + sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); + sgl->word2 = le32_to_cpu(sgl->word2); + bf_set(lpfc_sli4_sge_last, sgl, 0); + sgl->word2 = cpu_to_le32(sgl->word2); + sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); + sgl++; + + /* Setup the physical region for the FCP RSP */ + pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); + sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); + sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); + sgl->word2 = le32_to_cpu(sgl->word2); + bf_set(lpfc_sli4_sge_last, sgl, 1); + sgl->word2 = cpu_to_le32(sgl->word2); + sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); + + if (lpfc_ndlp_check_qdepth(phba, ndlp)) { + atomic_inc(&ndlp->cmd_pending); + lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH; + } + return lpfc_cmd; +} +/** + * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA + * @phba: The HBA for which this call is being executed. + * @ndlp: pointer to a node-list data structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list + * and returns to caller. + * + * Return codes: + * NULL - Error + * Pointer to lpfc_scsi_buf - Success + **/ +static struct lpfc_io_buf* +lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, + struct scsi_cmnd *cmnd) +{ + return phba->lpfc_get_scsi_buf(phba, ndlp, cmnd); +} + +/** + * lpfc_release_scsi_buf_s3 - Return a scsi buffer back to hba scsi buf list + * @phba: The Hba for which this call is being executed. + * @psb: The scsi buffer which is being released. + * + * This routine releases @psb scsi buffer by adding it to tail of @phba + * lpfc_scsi_buf_list list. + **/ +static void +lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb) +{ + unsigned long iflag = 0; + + psb->seg_cnt = 0; + psb->prot_seg_cnt = 0; + + spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); + psb->pCmd = NULL; + psb->cur_iocbq.cmd_flag = LPFC_IO_FCP; + list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); + spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); +} + +/** + * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. + * @phba: The Hba for which this call is being executed. + * @psb: The scsi buffer which is being released. + * + * This routine releases @psb scsi buffer by adding it to tail of @hdwq + * io_buf_list list. For SLI4 XRI's are tied to the scsi buffer + * and cannot be reused for at least RA_TOV amount of time if it was + * aborted. + **/ +static void +lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb) +{ + struct lpfc_sli4_hdw_queue *qp; + unsigned long iflag = 0; + + psb->seg_cnt = 0; + psb->prot_seg_cnt = 0; + + qp = psb->hdwq; + if (psb->flags & LPFC_SBUF_XBUSY) { + spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag); + if (!phba->cfg_fcp_wait_abts_rsp) + psb->pCmd = NULL; + list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list); + qp->abts_scsi_io_bufs++; + spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag); + } else { + lpfc_release_io_buf(phba, (struct lpfc_io_buf *)psb, qp); + } +} + +/** + * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. + * @phba: The Hba for which this call is being executed. + * @psb: The scsi buffer which is being released. + * + * This routine releases @psb scsi buffer by adding it to tail of @phba + * lpfc_scsi_buf_list list. + **/ +static void +lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb) +{ + if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp) + atomic_dec(&psb->ndlp->cmd_pending); + + psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH; + phba->lpfc_release_scsi_buf(phba, psb); +} + +/** + * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB + * @data: A pointer to the immediate command data portion of the IOCB. + * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. + * + * The routine copies the entire FCP command from @fcp_cmnd to @data while + * byte swapping the data to big endian format for transmission on the wire. + **/ +static void +lpfc_fcpcmd_to_iocb(u8 *data, struct fcp_cmnd *fcp_cmnd) +{ + int i, j; + + for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); + i += sizeof(uint32_t), j++) { + ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); + } +} + +/** + * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * + * This routine does the pci dma mapping for scatter-gather list of scsi cmnd + * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans + * through sg elements and format the bde. This routine also initializes all + * IOCB fields which are dependent on scsi command request buffer. + * + * Return codes: + * 1 - Error + * 0 - Success + **/ +static int +lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd) +{ + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct scatterlist *sgel = NULL; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl; + struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; + IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; + struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; + dma_addr_t physaddr; + uint32_t num_bde = 0; + int nseg, datadir = scsi_cmnd->sc_data_direction; + + /* + * There are three possibilities here - use scatter-gather segment, use + * the single mapping, or neither. Start the lpfc command prep by + * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first + * data bde entry. + */ + bpl += 2; + if (scsi_sg_count(scsi_cmnd)) { + /* + * The driver stores the segment count returned from dma_map_sg + * because this a count of dma-mappings used to map the use_sg + * pages. They are not guaranteed to be the same for those + * architectures that implement an IOMMU. + */ + + nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), + scsi_sg_count(scsi_cmnd), datadir); + if (unlikely(!nseg)) + return 1; + + lpfc_cmd->seg_cnt = nseg; + if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9064 BLKGRD: %s: Too many sg segments" + " from dma_map_sg. Config %d, seg_cnt" + " %d\n", __func__, phba->cfg_sg_seg_cnt, + lpfc_cmd->seg_cnt); + WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt); + lpfc_cmd->seg_cnt = 0; + scsi_dma_unmap(scsi_cmnd); + return 2; + } + + /* + * The driver established a maximum scatter-gather segment count + * during probe that limits the number of sg elements in any + * single scsi command. Just run through the seg_cnt and format + * the bde's. + * When using SLI-3 the driver will try to fit all the BDEs into + * the IOCB. If it can't then the BDEs get added to a BPL as it + * does for SLI-2 mode. + */ + scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { + physaddr = sg_dma_address(sgel); + if (phba->sli_rev == 3 && + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && + !(iocbq->cmd_flag & DSS_SECURITY_OP) && + nseg <= LPFC_EXT_DATA_BDE_COUNT) { + data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + data_bde->tus.f.bdeSize = sg_dma_len(sgel); + data_bde->addrLow = putPaddrLow(physaddr); + data_bde->addrHigh = putPaddrHigh(physaddr); + data_bde++; + } else { + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + bpl->tus.f.bdeSize = sg_dma_len(sgel); + bpl->tus.w = le32_to_cpu(bpl->tus.w); + bpl->addrLow = + le32_to_cpu(putPaddrLow(physaddr)); + bpl->addrHigh = + le32_to_cpu(putPaddrHigh(physaddr)); + bpl++; + } + } + } + + /* + * Finish initializing those IOCB fields that are dependent on the + * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is + * explicitly reinitialized and for SLI-3 the extended bde count is + * explicitly reinitialized since all iocb memory resources are reused. + */ + if (phba->sli_rev == 3 && + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && + !(iocbq->cmd_flag & DSS_SECURITY_OP)) { + if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { + /* + * The extended IOCB format can only fit 3 BDE or a BPL. + * This I/O has more than 3 BDE so the 1st data bde will + * be a BPL that is filled in here. + */ + physaddr = lpfc_cmd->dma_handle; + data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; + data_bde->tus.f.bdeSize = (num_bde * + sizeof(struct ulp_bde64)); + physaddr += (sizeof(struct fcp_cmnd) + + sizeof(struct fcp_rsp) + + (2 * sizeof(struct ulp_bde64))); + data_bde->addrHigh = putPaddrHigh(physaddr); + data_bde->addrLow = putPaddrLow(physaddr); + /* ebde count includes the response bde and data bpl */ + iocb_cmd->unsli3.fcp_ext.ebde_count = 2; + } else { + /* ebde count includes the response bde and data bdes */ + iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); + } + } else { + iocb_cmd->un.fcpi64.bdl.bdeSize = + ((num_bde + 2) * sizeof(struct ulp_bde64)); + iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); + } + fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); + + /* + * Due to difference in data length between DIF/non-DIF paths, + * we need to set word 4 of IOCB here + */ + iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); + lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); + return 0; +} + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + +/* Return BG_ERR_INIT if error injection is detected by Initiator */ +#define BG_ERR_INIT 0x1 +/* Return BG_ERR_TGT if error injection is detected by Target */ +#define BG_ERR_TGT 0x2 +/* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */ +#define BG_ERR_SWAP 0x10 +/* + * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for + * error injection + */ +#define BG_ERR_CHECK 0x20 + +/** + * lpfc_bg_err_inject - Determine if we should inject an error + * @phba: The Hba for which this call is being executed. + * @sc: The SCSI command to examine + * @reftag: (out) BlockGuard reference tag for transmitted data + * @apptag: (out) BlockGuard application tag for transmitted data + * @new_guard: (in) Value to replace CRC with if needed + * + * Returns BG_ERR_* bit mask or 0 if request ignored + **/ +static int +lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, + uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) +{ + struct scatterlist *sgpe; /* s/g prot entry */ + struct lpfc_io_buf *lpfc_cmd = NULL; + struct scsi_dif_tuple *src = NULL; + struct lpfc_nodelist *ndlp; + struct lpfc_rport_data *rdata; + uint32_t op = scsi_get_prot_op(sc); + uint32_t blksize; + uint32_t numblks; + u32 lba; + int rc = 0; + int blockoff = 0; + + if (op == SCSI_PROT_NORMAL) + return 0; + + sgpe = scsi_prot_sglist(sc); + lba = scsi_prot_ref_tag(sc); + + /* First check if we need to match the LBA */ + if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { + blksize = scsi_prot_interval(sc); + numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; + + /* Make sure we have the right LBA if one is specified */ + if (phba->lpfc_injerr_lba < (u64)lba || + (phba->lpfc_injerr_lba >= (u64)(lba + numblks))) + return 0; + if (sgpe) { + blockoff = phba->lpfc_injerr_lba - (u64)lba; + numblks = sg_dma_len(sgpe) / + sizeof(struct scsi_dif_tuple); + if (numblks < blockoff) + blockoff = numblks; + } + } + + /* Next check if we need to match the remote NPortID or WWPN */ + rdata = lpfc_rport_data_from_scsi_device(sc->device); + if (rdata && rdata->pnode) { + ndlp = rdata->pnode; + + /* Make sure we have the right NPortID if one is specified */ + if (phba->lpfc_injerr_nportid && + (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) + return 0; + + /* + * Make sure we have the right WWPN if one is specified. + * wwn[0] should be a non-zero NAA in a good WWPN. + */ + if (phba->lpfc_injerr_wwpn.u.wwn[0] && + (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, + sizeof(struct lpfc_name)) != 0)) + return 0; + } + + /* Setup a ptr to the protection data if the SCSI host provides it */ + if (sgpe) { + src = (struct scsi_dif_tuple *)sg_virt(sgpe); + src += blockoff; + lpfc_cmd = (struct lpfc_io_buf *)sc->host_scribble; + } + + /* Should we change the Reference Tag */ + if (reftag) { + if (phba->lpfc_injerr_wref_cnt) { + switch (op) { + case SCSI_PROT_WRITE_PASS: + if (src) { + /* + * For WRITE_PASS, force the error + * to be sent on the wire. It should + * be detected by the Target. + * If blockoff != 0 error will be + * inserted in middle of the IO. + */ + + lpfc_printf_log(phba, KERN_ERR, + LOG_TRACE_EVENT, + "9076 BLKGRD: Injecting reftag error: " + "write lba x%lx + x%x oldrefTag x%x\n", + (unsigned long)lba, blockoff, + be32_to_cpu(src->ref_tag)); + + /* + * Save the old ref_tag so we can + * restore it on completion. + */ + if (lpfc_cmd) { + lpfc_cmd->prot_data_type = + LPFC_INJERR_REFTAG; + lpfc_cmd->prot_data_segment = + src; + lpfc_cmd->prot_data = + src->ref_tag; + } + src->ref_tag = cpu_to_be32(0xDEADBEEF); + phba->lpfc_injerr_wref_cnt--; + if (phba->lpfc_injerr_wref_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_TGT | BG_ERR_CHECK; + + break; + } + fallthrough; + case SCSI_PROT_WRITE_INSERT: + /* + * For WRITE_INSERT, force the error + * to be sent on the wire. It should be + * detected by the Target. + */ + /* DEADBEEF will be the reftag on the wire */ + *reftag = 0xDEADBEEF; + phba->lpfc_injerr_wref_cnt--; + if (phba->lpfc_injerr_wref_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_TGT | BG_ERR_CHECK; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9078 BLKGRD: Injecting reftag error: " + "write lba x%lx\n", (unsigned long)lba); + break; + case SCSI_PROT_WRITE_STRIP: + /* + * For WRITE_STRIP and WRITE_PASS, + * force the error on data + * being copied from SLI-Host to SLI-Port. + */ + *reftag = 0xDEADBEEF; + phba->lpfc_injerr_wref_cnt--; + if (phba->lpfc_injerr_wref_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_INIT; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9077 BLKGRD: Injecting reftag error: " + "write lba x%lx\n", (unsigned long)lba); + break; + } + } + if (phba->lpfc_injerr_rref_cnt) { + switch (op) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_READ_PASS: + /* + * For READ_STRIP and READ_PASS, force the + * error on data being read off the wire. It + * should force an IO error to the driver. + */ + *reftag = 0xDEADBEEF; + phba->lpfc_injerr_rref_cnt--; + if (phba->lpfc_injerr_rref_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_INIT; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9079 BLKGRD: Injecting reftag error: " + "read lba x%lx\n", (unsigned long)lba); + break; + } + } + } + + /* Should we change the Application Tag */ + if (apptag) { + if (phba->lpfc_injerr_wapp_cnt) { + switch (op) { + case SCSI_PROT_WRITE_PASS: + if (src) { + /* + * For WRITE_PASS, force the error + * to be sent on the wire. It should + * be detected by the Target. + * If blockoff != 0 error will be + * inserted in middle of the IO. + */ + + lpfc_printf_log(phba, KERN_ERR, + LOG_TRACE_EVENT, + "9080 BLKGRD: Injecting apptag error: " + "write lba x%lx + x%x oldappTag x%x\n", + (unsigned long)lba, blockoff, + be16_to_cpu(src->app_tag)); + + /* + * Save the old app_tag so we can + * restore it on completion. + */ + if (lpfc_cmd) { + lpfc_cmd->prot_data_type = + LPFC_INJERR_APPTAG; + lpfc_cmd->prot_data_segment = + src; + lpfc_cmd->prot_data = + src->app_tag; + } + src->app_tag = cpu_to_be16(0xDEAD); + phba->lpfc_injerr_wapp_cnt--; + if (phba->lpfc_injerr_wapp_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_TGT | BG_ERR_CHECK; + break; + } + fallthrough; + case SCSI_PROT_WRITE_INSERT: + /* + * For WRITE_INSERT, force the + * error to be sent on the wire. It should be + * detected by the Target. + */ + /* DEAD will be the apptag on the wire */ + *apptag = 0xDEAD; + phba->lpfc_injerr_wapp_cnt--; + if (phba->lpfc_injerr_wapp_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_TGT | BG_ERR_CHECK; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "0813 BLKGRD: Injecting apptag error: " + "write lba x%lx\n", (unsigned long)lba); + break; + case SCSI_PROT_WRITE_STRIP: + /* + * For WRITE_STRIP and WRITE_PASS, + * force the error on data + * being copied from SLI-Host to SLI-Port. + */ + *apptag = 0xDEAD; + phba->lpfc_injerr_wapp_cnt--; + if (phba->lpfc_injerr_wapp_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_INIT; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "0812 BLKGRD: Injecting apptag error: " + "write lba x%lx\n", (unsigned long)lba); + break; + } + } + if (phba->lpfc_injerr_rapp_cnt) { + switch (op) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_READ_PASS: + /* + * For READ_STRIP and READ_PASS, force the + * error on data being read off the wire. It + * should force an IO error to the driver. + */ + *apptag = 0xDEAD; + phba->lpfc_injerr_rapp_cnt--; + if (phba->lpfc_injerr_rapp_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + rc = BG_ERR_INIT; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "0814 BLKGRD: Injecting apptag error: " + "read lba x%lx\n", (unsigned long)lba); + break; + } + } + } + + + /* Should we change the Guard Tag */ + if (new_guard) { + if (phba->lpfc_injerr_wgrd_cnt) { + switch (op) { + case SCSI_PROT_WRITE_PASS: + rc = BG_ERR_CHECK; + fallthrough; + + case SCSI_PROT_WRITE_INSERT: + /* + * For WRITE_INSERT, force the + * error to be sent on the wire. It should be + * detected by the Target. + */ + phba->lpfc_injerr_wgrd_cnt--; + if (phba->lpfc_injerr_wgrd_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + + rc |= BG_ERR_TGT | BG_ERR_SWAP; + /* Signals the caller to swap CRC->CSUM */ + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "0817 BLKGRD: Injecting guard error: " + "write lba x%lx\n", (unsigned long)lba); + break; + case SCSI_PROT_WRITE_STRIP: + /* + * For WRITE_STRIP and WRITE_PASS, + * force the error on data + * being copied from SLI-Host to SLI-Port. + */ + phba->lpfc_injerr_wgrd_cnt--; + if (phba->lpfc_injerr_wgrd_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + + rc = BG_ERR_INIT | BG_ERR_SWAP; + /* Signals the caller to swap CRC->CSUM */ + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "0816 BLKGRD: Injecting guard error: " + "write lba x%lx\n", (unsigned long)lba); + break; + } + } + if (phba->lpfc_injerr_rgrd_cnt) { + switch (op) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_READ_PASS: + /* + * For READ_STRIP and READ_PASS, force the + * error on data being read off the wire. It + * should force an IO error to the driver. + */ + phba->lpfc_injerr_rgrd_cnt--; + if (phba->lpfc_injerr_rgrd_cnt == 0) { + phba->lpfc_injerr_nportid = 0; + phba->lpfc_injerr_lba = + LPFC_INJERR_LBA_OFF; + memset(&phba->lpfc_injerr_wwpn, + 0, sizeof(struct lpfc_name)); + } + + rc = BG_ERR_INIT | BG_ERR_SWAP; + /* Signals the caller to swap CRC->CSUM */ + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "0818 BLKGRD: Injecting guard error: " + "read lba x%lx\n", (unsigned long)lba); + } + } + } + + return rc; +} +#endif + +/** + * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with + * the specified SCSI command. + * @phba: The Hba for which this call is being executed. + * @sc: The SCSI command to examine + * @txop: (out) BlockGuard operation for transmitted data + * @rxop: (out) BlockGuard operation for received data + * + * Returns: zero on success; non-zero if tx and/or rx op cannot be determined + * + **/ +static int +lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, + uint8_t *txop, uint8_t *rxop) +{ + uint8_t ret = 0; + + if (sc->prot_flags & SCSI_PROT_IP_CHECKSUM) { + switch (scsi_get_prot_op(sc)) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + *rxop = BG_OP_IN_NODIF_OUT_CSUM; + *txop = BG_OP_IN_CSUM_OUT_NODIF; + break; + + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + *rxop = BG_OP_IN_CRC_OUT_NODIF; + *txop = BG_OP_IN_NODIF_OUT_CRC; + break; + + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + *rxop = BG_OP_IN_CRC_OUT_CSUM; + *txop = BG_OP_IN_CSUM_OUT_CRC; + break; + + case SCSI_PROT_NORMAL: + default: + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9063 BLKGRD: Bad op/guard:%d/IP combination\n", + scsi_get_prot_op(sc)); + ret = 1; + break; + + } + } else { + switch (scsi_get_prot_op(sc)) { + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + *rxop = BG_OP_IN_CRC_OUT_NODIF; + *txop = BG_OP_IN_NODIF_OUT_CRC; + break; + + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + *rxop = BG_OP_IN_CRC_OUT_CRC; + *txop = BG_OP_IN_CRC_OUT_CRC; + break; + + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + *rxop = BG_OP_IN_NODIF_OUT_CRC; + *txop = BG_OP_IN_CRC_OUT_NODIF; + break; + + case SCSI_PROT_NORMAL: + default: + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", + scsi_get_prot_op(sc)); + ret = 1; + break; + } + } + + return ret; +} + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS +/** + * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with + * the specified SCSI command in order to force a guard tag error. + * @phba: The Hba for which this call is being executed. + * @sc: The SCSI command to examine + * @txop: (out) BlockGuard operation for transmitted data + * @rxop: (out) BlockGuard operation for received data + * + * Returns: zero on success; non-zero if tx and/or rx op cannot be determined + * + **/ +static int +lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, + uint8_t *txop, uint8_t *rxop) +{ + + if (sc->prot_flags & SCSI_PROT_IP_CHECKSUM) { + switch (scsi_get_prot_op(sc)) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + *rxop = BG_OP_IN_NODIF_OUT_CRC; + *txop = BG_OP_IN_CRC_OUT_NODIF; + break; + + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + *rxop = BG_OP_IN_CSUM_OUT_NODIF; + *txop = BG_OP_IN_NODIF_OUT_CSUM; + break; + + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + *rxop = BG_OP_IN_CSUM_OUT_CRC; + *txop = BG_OP_IN_CRC_OUT_CSUM; + break; + + case SCSI_PROT_NORMAL: + default: + break; + + } + } else { + switch (scsi_get_prot_op(sc)) { + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + *rxop = BG_OP_IN_CSUM_OUT_NODIF; + *txop = BG_OP_IN_NODIF_OUT_CSUM; + break; + + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + *rxop = BG_OP_IN_CSUM_OUT_CSUM; + *txop = BG_OP_IN_CSUM_OUT_CSUM; + break; + + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + *rxop = BG_OP_IN_NODIF_OUT_CSUM; + *txop = BG_OP_IN_CSUM_OUT_NODIF; + break; + + case SCSI_PROT_NORMAL: + default: + break; + } + } + + return 0; +} +#endif + +/** + * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data + * @phba: The Hba for which this call is being executed. + * @sc: pointer to scsi command we're working on + * @bpl: pointer to buffer list for protection groups + * @datasegcnt: number of segments of data that have been dma mapped + * + * This function sets up BPL buffer list for protection groups of + * type LPFC_PG_TYPE_NO_DIF + * + * This is usually used when the HBA is instructed to generate + * DIFs and insert them into data stream (or strip DIF from + * incoming data stream) + * + * The buffer list consists of just one protection group described + * below: + * +-------------------------+ + * start of prot group --> | PDE_5 | + * +-------------------------+ + * | PDE_6 | + * +-------------------------+ + * | Data BDE | + * +-------------------------+ + * |more Data BDE's ... (opt)| + * +-------------------------+ + * + * + * Note: Data s/g buffers have been dma mapped + * + * Returns the number of BDEs added to the BPL. + **/ +static int +lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, + struct ulp_bde64 *bpl, int datasegcnt) +{ + struct scatterlist *sgde = NULL; /* s/g data entry */ + struct lpfc_pde5 *pde5 = NULL; + struct lpfc_pde6 *pde6 = NULL; + dma_addr_t physaddr; + int i = 0, num_bde = 0, status; + int datadir = sc->sc_data_direction; +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + uint32_t rc; +#endif + uint32_t checking = 1; + uint32_t reftag; + uint8_t txop, rxop; + + status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); + if (status) + goto out; + + /* extract some info from the scsi command for pde*/ + reftag = scsi_prot_ref_tag(sc); + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); + if (rc) { + if (rc & BG_ERR_SWAP) + lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); + if (rc & BG_ERR_CHECK) + checking = 0; + } +#endif + + /* setup PDE5 with what we have */ + pde5 = (struct lpfc_pde5 *) bpl; + memset(pde5, 0, sizeof(struct lpfc_pde5)); + bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); + + /* Endianness conversion if necessary for PDE5 */ + pde5->word0 = cpu_to_le32(pde5->word0); + pde5->reftag = cpu_to_le32(reftag); + + /* advance bpl and increment bde count */ + num_bde++; + bpl++; + pde6 = (struct lpfc_pde6 *) bpl; + + /* setup PDE6 with the rest of the info */ + memset(pde6, 0, sizeof(struct lpfc_pde6)); + bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); + bf_set(pde6_optx, pde6, txop); + bf_set(pde6_oprx, pde6, rxop); + + /* + * We only need to check the data on READs, for WRITEs + * protection data is automatically generated, not checked. + */ + if (datadir == DMA_FROM_DEVICE) { + if (sc->prot_flags & SCSI_PROT_GUARD_CHECK) + bf_set(pde6_ce, pde6, checking); + else + bf_set(pde6_ce, pde6, 0); + + if (sc->prot_flags & SCSI_PROT_REF_CHECK) + bf_set(pde6_re, pde6, checking); + else + bf_set(pde6_re, pde6, 0); + } + bf_set(pde6_ai, pde6, 1); + bf_set(pde6_ae, pde6, 0); + bf_set(pde6_apptagval, pde6, 0); + + /* Endianness conversion if necessary for PDE6 */ + pde6->word0 = cpu_to_le32(pde6->word0); + pde6->word1 = cpu_to_le32(pde6->word1); + pde6->word2 = cpu_to_le32(pde6->word2); + + /* advance bpl and increment bde count */ + num_bde++; + bpl++; + + /* assumption: caller has already run dma_map_sg on command data */ + scsi_for_each_sg(sc, sgde, datasegcnt, i) { + physaddr = sg_dma_address(sgde); + bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); + bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); + bpl->tus.f.bdeSize = sg_dma_len(sgde); + if (datadir == DMA_TO_DEVICE) + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + else + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; + bpl->tus.w = le32_to_cpu(bpl->tus.w); + bpl++; + num_bde++; + } + +out: + return num_bde; +} + +/** + * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data + * @phba: The Hba for which this call is being executed. + * @sc: pointer to scsi command we're working on + * @bpl: pointer to buffer list for protection groups + * @datacnt: number of segments of data that have been dma mapped + * @protcnt: number of segment of protection data that have been dma mapped + * + * This function sets up BPL buffer list for protection groups of + * type LPFC_PG_TYPE_DIF + * + * This is usually used when DIFs are in their own buffers, + * separate from the data. The HBA can then by instructed + * to place the DIFs in the outgoing stream. For read operations, + * The HBA could extract the DIFs and place it in DIF buffers. + * + * The buffer list for this type consists of one or more of the + * protection groups described below: + * +-------------------------+ + * start of first prot group --> | PDE_5 | + * +-------------------------+ + * | PDE_6 | + * +-------------------------+ + * | PDE_7 (Prot BDE) | + * +-------------------------+ + * | Data BDE | + * +-------------------------+ + * |more Data BDE's ... (opt)| + * +-------------------------+ + * start of new prot group --> | PDE_5 | + * +-------------------------+ + * | ... | + * +-------------------------+ + * + * Note: It is assumed that both data and protection s/g buffers have been + * mapped for DMA + * + * Returns the number of BDEs added to the BPL. + **/ +static int +lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, + struct ulp_bde64 *bpl, int datacnt, int protcnt) +{ + struct scatterlist *sgde = NULL; /* s/g data entry */ + struct scatterlist *sgpe = NULL; /* s/g prot entry */ + struct lpfc_pde5 *pde5 = NULL; + struct lpfc_pde6 *pde6 = NULL; + struct lpfc_pde7 *pde7 = NULL; + dma_addr_t dataphysaddr, protphysaddr; + unsigned short curr_prot = 0; + unsigned int split_offset; + unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; + unsigned int protgrp_blks, protgrp_bytes; + unsigned int remainder, subtotal; + int status; + int datadir = sc->sc_data_direction; + unsigned char pgdone = 0, alldone = 0; + unsigned blksize; +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + uint32_t rc; +#endif + uint32_t checking = 1; + uint32_t reftag; + uint8_t txop, rxop; + int num_bde = 0; + + sgpe = scsi_prot_sglist(sc); + sgde = scsi_sglist(sc); + + if (!sgpe || !sgde) { + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9020 Invalid s/g entry: data=x%px prot=x%px\n", + sgpe, sgde); + return 0; + } + + status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); + if (status) + goto out; + + /* extract some info from the scsi command */ + blksize = scsi_prot_interval(sc); + reftag = scsi_prot_ref_tag(sc); + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); + if (rc) { + if (rc & BG_ERR_SWAP) + lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); + if (rc & BG_ERR_CHECK) + checking = 0; + } +#endif + + split_offset = 0; + do { + /* Check to see if we ran out of space */ + if (num_bde >= (phba->cfg_total_seg_cnt - 2)) + return num_bde + 3; + + /* setup PDE5 with what we have */ + pde5 = (struct lpfc_pde5 *) bpl; + memset(pde5, 0, sizeof(struct lpfc_pde5)); + bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); + + /* Endianness conversion if necessary for PDE5 */ + pde5->word0 = cpu_to_le32(pde5->word0); + pde5->reftag = cpu_to_le32(reftag); + + /* advance bpl and increment bde count */ + num_bde++; + bpl++; + pde6 = (struct lpfc_pde6 *) bpl; + + /* setup PDE6 with the rest of the info */ + memset(pde6, 0, sizeof(struct lpfc_pde6)); + bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); + bf_set(pde6_optx, pde6, txop); + bf_set(pde6_oprx, pde6, rxop); + + if (sc->prot_flags & SCSI_PROT_GUARD_CHECK) + bf_set(pde6_ce, pde6, checking); + else + bf_set(pde6_ce, pde6, 0); + + if (sc->prot_flags & SCSI_PROT_REF_CHECK) + bf_set(pde6_re, pde6, checking); + else + bf_set(pde6_re, pde6, 0); + + bf_set(pde6_ai, pde6, 1); + bf_set(pde6_ae, pde6, 0); + bf_set(pde6_apptagval, pde6, 0); + + /* Endianness conversion if necessary for PDE6 */ + pde6->word0 = cpu_to_le32(pde6->word0); + pde6->word1 = cpu_to_le32(pde6->word1); + pde6->word2 = cpu_to_le32(pde6->word2); + + /* advance bpl and increment bde count */ + num_bde++; + bpl++; + + /* setup the first BDE that points to protection buffer */ + protphysaddr = sg_dma_address(sgpe) + protgroup_offset; + protgroup_len = sg_dma_len(sgpe) - protgroup_offset; + + /* must be integer multiple of the DIF block length */ + BUG_ON(protgroup_len % 8); + + pde7 = (struct lpfc_pde7 *) bpl; + memset(pde7, 0, sizeof(struct lpfc_pde7)); + bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); + + pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); + pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); + + protgrp_blks = protgroup_len / 8; + protgrp_bytes = protgrp_blks * blksize; + + /* check if this pde is crossing the 4K boundary; if so split */ + if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { + protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); + protgroup_offset += protgroup_remainder; + protgrp_blks = protgroup_remainder / 8; + protgrp_bytes = protgrp_blks * blksize; + } else { + protgroup_offset = 0; + curr_prot++; + } + + num_bde++; + + /* setup BDE's for data blocks associated with DIF data */ + pgdone = 0; + subtotal = 0; /* total bytes processed for current prot grp */ + while (!pgdone) { + /* Check to see if we ran out of space */ + if (num_bde >= phba->cfg_total_seg_cnt) + return num_bde + 1; + + if (!sgde) { + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9065 BLKGRD:%s Invalid data segment\n", + __func__); + return 0; + } + bpl++; + dataphysaddr = sg_dma_address(sgde) + split_offset; + bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); + bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); + + remainder = sg_dma_len(sgde) - split_offset; + + if ((subtotal + remainder) <= protgrp_bytes) { + /* we can use this whole buffer */ + bpl->tus.f.bdeSize = remainder; + split_offset = 0; + + if ((subtotal + remainder) == protgrp_bytes) + pgdone = 1; + } else { + /* must split this buffer with next prot grp */ + bpl->tus.f.bdeSize = protgrp_bytes - subtotal; + split_offset += bpl->tus.f.bdeSize; + } + + subtotal += bpl->tus.f.bdeSize; + + if (datadir == DMA_TO_DEVICE) + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + else + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; + bpl->tus.w = le32_to_cpu(bpl->tus.w); + + num_bde++; + + if (split_offset) + break; + + /* Move to the next s/g segment if possible */ + sgde = sg_next(sgde); + + } + + if (protgroup_offset) { + /* update the reference tag */ + reftag += protgrp_blks; + bpl++; + continue; + } + + /* are we done ? */ + if (curr_prot == protcnt) { + alldone = 1; + } else if (curr_prot < protcnt) { + /* advance to next prot buffer */ + sgpe = sg_next(sgpe); + bpl++; + + /* update the reference tag */ + reftag += protgrp_blks; + } else { + /* if we're here, we have a bug */ + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9054 BLKGRD: bug in %s\n", __func__); + } + + } while (!alldone); +out: + + return num_bde; +} + +/** + * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data + * @phba: The Hba for which this call is being executed. + * @sc: pointer to scsi command we're working on + * @sgl: pointer to buffer list for protection groups + * @datasegcnt: number of segments of data that have been dma mapped + * @lpfc_cmd: lpfc scsi command object pointer. + * + * This function sets up SGL buffer list for protection groups of + * type LPFC_PG_TYPE_NO_DIF + * + * This is usually used when the HBA is instructed to generate + * DIFs and insert them into data stream (or strip DIF from + * incoming data stream) + * + * The buffer list consists of just one protection group described + * below: + * +-------------------------+ + * start of prot group --> | DI_SEED | + * +-------------------------+ + * | Data SGE | + * +-------------------------+ + * |more Data SGE's ... (opt)| + * +-------------------------+ + * + * + * Note: Data s/g buffers have been dma mapped + * + * Returns the number of SGEs added to the SGL. + **/ +static int +lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, + struct sli4_sge *sgl, int datasegcnt, + struct lpfc_io_buf *lpfc_cmd) +{ + struct scatterlist *sgde = NULL; /* s/g data entry */ + struct sli4_sge_diseed *diseed = NULL; + dma_addr_t physaddr; + int i = 0, num_sge = 0, status; + uint32_t reftag; + uint8_t txop, rxop; +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + uint32_t rc; +#endif + uint32_t checking = 1; + uint32_t dma_len; + uint32_t dma_offset = 0; + struct sli4_hybrid_sgl *sgl_xtra = NULL; + int j; + bool lsp_just_set = false; + + status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); + if (status) + goto out; + + /* extract some info from the scsi command for pde*/ + reftag = scsi_prot_ref_tag(sc); + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); + if (rc) { + if (rc & BG_ERR_SWAP) + lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); + if (rc & BG_ERR_CHECK) + checking = 0; + } +#endif + + /* setup DISEED with what we have */ + diseed = (struct sli4_sge_diseed *) sgl; + memset(diseed, 0, sizeof(struct sli4_sge_diseed)); + bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); + + /* Endianness conversion if necessary */ + diseed->ref_tag = cpu_to_le32(reftag); + diseed->ref_tag_tran = diseed->ref_tag; + + /* + * We only need to check the data on READs, for WRITEs + * protection data is automatically generated, not checked. + */ + if (sc->sc_data_direction == DMA_FROM_DEVICE) { + if (sc->prot_flags & SCSI_PROT_GUARD_CHECK) + bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); + else + bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); + + if (sc->prot_flags & SCSI_PROT_REF_CHECK) + bf_set(lpfc_sli4_sge_dif_re, diseed, checking); + else + bf_set(lpfc_sli4_sge_dif_re, diseed, 0); + } + + /* setup DISEED with the rest of the info */ + bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); + bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); + + bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); + bf_set(lpfc_sli4_sge_dif_me, diseed, 0); + + /* Endianness conversion if necessary for DISEED */ + diseed->word2 = cpu_to_le32(diseed->word2); + diseed->word3 = cpu_to_le32(diseed->word3); + + /* advance bpl and increment sge count */ + num_sge++; + sgl++; + + /* assumption: caller has already run dma_map_sg on command data */ + sgde = scsi_sglist(sc); + j = 3; + for (i = 0; i < datasegcnt; i++) { + /* clear it */ + sgl->word2 = 0; + + /* do we need to expand the segment */ + if (!lsp_just_set && !((j + 1) % phba->border_sge_num) && + ((datasegcnt - 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_cmd); + + if (unlikely(!sgl_xtra)) { + lpfc_cmd->seg_cnt = 0; + return 0; + } + 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 ((datasegcnt - 1) == i) + bf_set(lpfc_sli4_sge_last, sgl, 1); + physaddr = sg_dma_address(sgde); + dma_len = sg_dma_len(sgde); + 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; + sgde = sg_next(sgde); + + sgl++; + num_sge++; + 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++; + + } + +out: + return num_sge; +} + +/** + * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data + * @phba: The Hba for which this call is being executed. + * @sc: pointer to scsi command we're working on + * @sgl: pointer to buffer list for protection groups + * @datacnt: number of segments of data that have been dma mapped + * @protcnt: number of segment of protection data that have been dma mapped + * @lpfc_cmd: lpfc scsi command object pointer. + * + * This function sets up SGL buffer list for protection groups of + * type LPFC_PG_TYPE_DIF + * + * This is usually used when DIFs are in their own buffers, + * separate from the data. The HBA can then by instructed + * to place the DIFs in the outgoing stream. For read operations, + * The HBA could extract the DIFs and place it in DIF buffers. + * + * The buffer list for this type consists of one or more of the + * protection groups described below: + * +-------------------------+ + * start of first prot group --> | DISEED | + * +-------------------------+ + * | DIF (Prot SGE) | + * +-------------------------+ + * | Data SGE | + * +-------------------------+ + * |more Data SGE's ... (opt)| + * +-------------------------+ + * start of new prot group --> | DISEED | + * +-------------------------+ + * | ... | + * +-------------------------+ + * + * Note: It is assumed that both data and protection s/g buffers have been + * mapped for DMA + * + * Returns the number of SGEs added to the SGL. + **/ +static int +lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, + struct sli4_sge *sgl, int datacnt, int protcnt, + struct lpfc_io_buf *lpfc_cmd) +{ + struct scatterlist *sgde = NULL; /* s/g data entry */ + struct scatterlist *sgpe = NULL; /* s/g prot entry */ + struct sli4_sge_diseed *diseed = NULL; + dma_addr_t dataphysaddr, protphysaddr; + unsigned short curr_prot = 0; + unsigned int split_offset; + unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; + unsigned int protgrp_blks, protgrp_bytes; + unsigned int remainder, subtotal; + int status; + unsigned char pgdone = 0, alldone = 0; + unsigned blksize; + uint32_t reftag; + uint8_t txop, rxop; + uint32_t dma_len; +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + uint32_t rc; +#endif + uint32_t checking = 1; + uint32_t dma_offset = 0; + int num_sge = 0, j = 2; + struct sli4_hybrid_sgl *sgl_xtra = NULL; + + sgpe = scsi_prot_sglist(sc); + sgde = scsi_sglist(sc); + + if (!sgpe || !sgde) { + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9082 Invalid s/g entry: data=x%px prot=x%px\n", + sgpe, sgde); + return 0; + } + + status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); + if (status) + goto out; + + /* extract some info from the scsi command */ + blksize = scsi_prot_interval(sc); + reftag = scsi_prot_ref_tag(sc); + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); + if (rc) { + if (rc & BG_ERR_SWAP) + lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); + if (rc & BG_ERR_CHECK) + checking = 0; + } +#endif + + split_offset = 0; + do { + /* Check to see if we ran out of space */ + if ((num_sge >= (phba->cfg_total_seg_cnt - 2)) && + !(phba->cfg_xpsgl)) + return num_sge + 3; + + /* DISEED and DIF have to be together */ + if (!((j + 1) % phba->border_sge_num) || + !((j + 2) % phba->border_sge_num) || + !((j + 3) % phba->border_sge_num)) { + sgl->word2 = 0; + + /* set LSP type */ + bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP); + + sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd); + + if (unlikely(!sgl_xtra)) { + goto out; + } else { + sgl->addr_lo = cpu_to_le32(putPaddrLow( + sgl_xtra->dma_phys_sgl)); + sgl->addr_hi = cpu_to_le32(putPaddrHigh( + sgl_xtra->dma_phys_sgl)); + } + + 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; + j = 0; + } + + /* setup DISEED with what we have */ + diseed = (struct sli4_sge_diseed *) sgl; + memset(diseed, 0, sizeof(struct sli4_sge_diseed)); + bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); + + /* Endianness conversion if necessary */ + diseed->ref_tag = cpu_to_le32(reftag); + diseed->ref_tag_tran = diseed->ref_tag; + + if (sc->prot_flags & SCSI_PROT_GUARD_CHECK) { + bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); + } else { + bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); + /* + * When in this mode, the hardware will replace + * the guard tag from the host with a + * newly generated good CRC for the wire. + * Switch to raw mode here to avoid this + * behavior. What the host sends gets put on the wire. + */ + if (txop == BG_OP_IN_CRC_OUT_CRC) { + txop = BG_OP_RAW_MODE; + rxop = BG_OP_RAW_MODE; + } + } + + + if (sc->prot_flags & SCSI_PROT_REF_CHECK) + bf_set(lpfc_sli4_sge_dif_re, diseed, checking); + else + bf_set(lpfc_sli4_sge_dif_re, diseed, 0); + + /* setup DISEED with the rest of the info */ + bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); + bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); + + bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); + bf_set(lpfc_sli4_sge_dif_me, diseed, 0); + + /* Endianness conversion if necessary for DISEED */ + diseed->word2 = cpu_to_le32(diseed->word2); + diseed->word3 = cpu_to_le32(diseed->word3); + + /* advance sgl and increment bde count */ + num_sge++; + + sgl++; + j++; + + /* setup the first BDE that points to protection buffer */ + protphysaddr = sg_dma_address(sgpe) + protgroup_offset; + protgroup_len = sg_dma_len(sgpe) - protgroup_offset; + + /* must be integer multiple of the DIF block length */ + BUG_ON(protgroup_len % 8); + + /* Now setup DIF SGE */ + sgl->word2 = 0; + bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); + sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); + sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); + sgl->word2 = cpu_to_le32(sgl->word2); + sgl->sge_len = 0; + + protgrp_blks = protgroup_len / 8; + protgrp_bytes = protgrp_blks * blksize; + + /* check if DIF SGE is crossing the 4K boundary; if so split */ + if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { + protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); + protgroup_offset += protgroup_remainder; + protgrp_blks = protgroup_remainder / 8; + protgrp_bytes = protgrp_blks * blksize; + } else { + protgroup_offset = 0; + curr_prot++; + } + + num_sge++; + + /* setup SGE's for data blocks associated with DIF data */ + pgdone = 0; + subtotal = 0; /* total bytes processed for current prot grp */ + + sgl++; + j++; + + while (!pgdone) { + /* Check to see if we ran out of space */ + if ((num_sge >= phba->cfg_total_seg_cnt) && + !phba->cfg_xpsgl) + return num_sge + 1; + + if (!sgde) { + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9086 BLKGRD:%s Invalid data segment\n", + __func__); + return 0; + } + + if (!((j + 1) % phba->border_sge_num)) { + sgl->word2 = 0; + + /* set LSP type */ + bf_set(lpfc_sli4_sge_type, sgl, + LPFC_SGE_TYPE_LSP); + + sgl_xtra = lpfc_get_sgl_per_hdwq(phba, + lpfc_cmd); + + if (unlikely(!sgl_xtra)) { + goto out; + } else { + sgl->addr_lo = cpu_to_le32( + putPaddrLow(sgl_xtra->dma_phys_sgl)); + sgl->addr_hi = cpu_to_le32( + putPaddrHigh(sgl_xtra->dma_phys_sgl)); + } + + 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; + } else { + dataphysaddr = sg_dma_address(sgde) + + split_offset; + + remainder = sg_dma_len(sgde) - split_offset; + + if ((subtotal + remainder) <= protgrp_bytes) { + /* we can use this whole buffer */ + dma_len = remainder; + split_offset = 0; + + if ((subtotal + remainder) == + protgrp_bytes) + pgdone = 1; + } else { + /* must split this buffer with next + * prot grp + */ + dma_len = protgrp_bytes - subtotal; + split_offset += dma_len; + } + + subtotal += dma_len; + + sgl->word2 = 0; + sgl->addr_lo = cpu_to_le32(putPaddrLow( + dataphysaddr)); + sgl->addr_hi = cpu_to_le32(putPaddrHigh( + dataphysaddr)); + bf_set(lpfc_sli4_sge_last, sgl, 0); + bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); + bf_set(lpfc_sli4_sge_type, sgl, + LPFC_SGE_TYPE_DATA); + + sgl->sge_len = cpu_to_le32(dma_len); + dma_offset += dma_len; + + num_sge++; + + if (split_offset) { + sgl++; + j++; + break; + } + + /* Move to the next s/g segment if possible */ + sgde = sg_next(sgde); + + sgl++; + } + + j++; + } + + if (protgroup_offset) { + /* update the reference tag */ + reftag += protgrp_blks; + continue; + } + + /* are we done ? */ + if (curr_prot == protcnt) { + /* mark the last SGL */ + sgl--; + bf_set(lpfc_sli4_sge_last, sgl, 1); + alldone = 1; + } else if (curr_prot < protcnt) { + /* advance to next prot buffer */ + sgpe = sg_next(sgpe); + + /* update the reference tag */ + reftag += protgrp_blks; + } else { + /* if we're here, we have a bug */ + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9085 BLKGRD: bug in %s\n", __func__); + } + + } while (!alldone); + +out: + + return num_sge; +} + +/** + * lpfc_prot_group_type - Get prtotection group type of SCSI command + * @phba: The Hba for which this call is being executed. + * @sc: pointer to scsi command we're working on + * + * Given a SCSI command that supports DIF, determine composition of protection + * groups involved in setting up buffer lists + * + * Returns: Protection group type (with or without DIF) + * + **/ +static int +lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) +{ + int ret = LPFC_PG_TYPE_INVALID; + unsigned char op = scsi_get_prot_op(sc); + + switch (op) { + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + ret = LPFC_PG_TYPE_NO_DIF; + break; + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + ret = LPFC_PG_TYPE_DIF_BUF; + break; + default: + if (phba) + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9021 Unsupported protection op:%d\n", + op); + break; + } + return ret; +} + +/** + * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be adjusted. + * + * Adjust the data length to account for how much data + * is actually on the wire. + * + * returns the adjusted data length + **/ +static int +lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, + struct lpfc_io_buf *lpfc_cmd) +{ + struct scsi_cmnd *sc = lpfc_cmd->pCmd; + int fcpdl; + + fcpdl = scsi_bufflen(sc); + + /* Check if there is protection data on the wire */ + if (sc->sc_data_direction == DMA_FROM_DEVICE) { + /* Read check for protection data */ + if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) + return fcpdl; + + } else { + /* Write check for protection data */ + if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) + return fcpdl; + } + + /* + * If we are in DIF Type 1 mode every data block has a 8 byte + * DIF (trailer) attached to it. Must ajust FCP data length + * to account for the protection data. + */ + fcpdl += (fcpdl / scsi_prot_interval(sc)) * 8; + + return fcpdl; +} + +/** + * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be prep'ed. + * + * This is the protection/DIF aware version of + * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the + * two functions eventually, but for now, it's here. + * RETURNS 0 - SUCCESS, + * 1 - Failed DMA map, retry. + * 2 - Invalid scsi cmd or prot-type. Do not rety. + **/ +static int +lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, + struct lpfc_io_buf *lpfc_cmd) +{ + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl; + IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; + uint32_t num_bde = 0; + int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; + int prot_group_type = 0; + int fcpdl; + int ret = 1; + struct lpfc_vport *vport = phba->pport; + + /* + * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd + * fcp_rsp regions to the first data bde entry + */ + bpl += 2; + if (scsi_sg_count(scsi_cmnd)) { + /* + * The driver stores the segment count returned from dma_map_sg + * because this a count of dma-mappings used to map the use_sg + * pages. They are not guaranteed to be the same for those + * architectures that implement an IOMMU. + */ + datasegcnt = dma_map_sg(&phba->pcidev->dev, + scsi_sglist(scsi_cmnd), + scsi_sg_count(scsi_cmnd), datadir); + if (unlikely(!datasegcnt)) + return 1; + + lpfc_cmd->seg_cnt = datasegcnt; + + /* First check if data segment count from SCSI Layer is good */ + if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { + WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt); + ret = 2; + goto err; + } + + prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); + + switch (prot_group_type) { + case LPFC_PG_TYPE_NO_DIF: + + /* Here we need to add a PDE5 and PDE6 to the count */ + if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) { + ret = 2; + goto err; + } + + num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, + datasegcnt); + /* we should have 2 or more entries in buffer list */ + if (num_bde < 2) { + ret = 2; + goto err; + } + break; + + case LPFC_PG_TYPE_DIF_BUF: + /* + * This type indicates that protection buffers are + * passed to the driver, so that needs to be prepared + * for DMA + */ + protsegcnt = dma_map_sg(&phba->pcidev->dev, + scsi_prot_sglist(scsi_cmnd), + scsi_prot_sg_count(scsi_cmnd), datadir); + if (unlikely(!protsegcnt)) { + scsi_dma_unmap(scsi_cmnd); + return 1; + } + + lpfc_cmd->prot_seg_cnt = protsegcnt; + + /* + * There is a minimun of 4 BPLs used for every + * protection data segment. + */ + if ((lpfc_cmd->prot_seg_cnt * 4) > + (phba->cfg_total_seg_cnt - 2)) { + ret = 2; + goto err; + } + + num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, + datasegcnt, protsegcnt); + /* we should have 3 or more entries in buffer list */ + if ((num_bde < 3) || + (num_bde > phba->cfg_total_seg_cnt)) { + ret = 2; + goto err; + } + break; + + case LPFC_PG_TYPE_INVALID: + default: + scsi_dma_unmap(scsi_cmnd); + lpfc_cmd->seg_cnt = 0; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9022 Unexpected protection group %i\n", + prot_group_type); + return 2; + } + } + + /* + * Finish initializing those IOCB fields that are dependent on the + * scsi_cmnd request_buffer. Note that the bdeSize is explicitly + * reinitialized since all iocb memory resources are used many times + * for transmit, receive, and continuation bpl's. + */ + iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); + iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); + iocb_cmd->ulpBdeCount = 1; + iocb_cmd->ulpLe = 1; + + fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); + fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); + + /* + * Due to difference in data length between DIF/non-DIF paths, + * we need to set word 4 of IOCB here + */ + iocb_cmd->un.fcpi.fcpi_parm = fcpdl; + + /* + * For First burst, we may need to adjust the initial transfer + * length for DIF + */ + if (iocb_cmd->un.fcpi.fcpi_XRdy && + (fcpdl < vport->cfg_first_burst_size)) + iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl; + + return 0; +err: + if (lpfc_cmd->seg_cnt) + scsi_dma_unmap(scsi_cmnd); + if (lpfc_cmd->prot_seg_cnt) + dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), + scsi_prot_sg_count(scsi_cmnd), + scsi_cmnd->sc_data_direction); + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9023 Cannot setup S/G List for HBA" + "IO segs %d/%d BPL %d SCSI %d: %d %d\n", + lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, + phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, + prot_group_type, num_bde); + + lpfc_cmd->seg_cnt = 0; + lpfc_cmd->prot_seg_cnt = 0; + return ret; +} + +/* + * This function calcuates the T10 DIF guard tag + * on the specified data using a CRC algorithmn + * using crc_t10dif. + */ +static uint16_t +lpfc_bg_crc(uint8_t *data, int count) +{ + uint16_t crc = 0; + uint16_t x; + + crc = crc_t10dif(data, count); + x = cpu_to_be16(crc); + return x; +} + +/* + * This function calcuates the T10 DIF guard tag + * on the specified data using a CSUM algorithmn + * using ip_compute_csum. + */ +static uint16_t +lpfc_bg_csum(uint8_t *data, int count) +{ + uint16_t ret; + + ret = ip_compute_csum(data, count); + return ret; +} + +/* + * This function examines the protection data to try to determine + * what type of T10-DIF error occurred. + */ +static void +lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd) +{ + struct scatterlist *sgpe; /* s/g prot entry */ + struct scatterlist *sgde; /* s/g data entry */ + struct scsi_cmnd *cmd = lpfc_cmd->pCmd; + struct scsi_dif_tuple *src = NULL; + uint8_t *data_src = NULL; + uint16_t guard_tag; + uint16_t start_app_tag, app_tag; + uint32_t start_ref_tag, ref_tag; + int prot, protsegcnt; + int err_type, len, data_len; + int chk_ref, chk_app, chk_guard; + uint16_t sum; + unsigned blksize; + + err_type = BGS_GUARD_ERR_MASK; + sum = 0; + guard_tag = 0; + + /* First check to see if there is protection data to examine */ + prot = scsi_get_prot_op(cmd); + if ((prot == SCSI_PROT_READ_STRIP) || + (prot == SCSI_PROT_WRITE_INSERT) || + (prot == SCSI_PROT_NORMAL)) + goto out; + + /* Currently the driver just supports ref_tag and guard_tag checking */ + chk_ref = 1; + chk_app = 0; + chk_guard = 0; + + /* Setup a ptr to the protection data provided by the SCSI host */ + sgpe = scsi_prot_sglist(cmd); + protsegcnt = lpfc_cmd->prot_seg_cnt; + + if (sgpe && protsegcnt) { + + /* + * We will only try to verify guard tag if the segment + * data length is a multiple of the blksize. + */ + sgde = scsi_sglist(cmd); + blksize = scsi_prot_interval(cmd); + data_src = (uint8_t *)sg_virt(sgde); + data_len = sgde->length; + if ((data_len & (blksize - 1)) == 0) + chk_guard = 1; + + src = (struct scsi_dif_tuple *)sg_virt(sgpe); + start_ref_tag = scsi_prot_ref_tag(cmd); + start_app_tag = src->app_tag; + len = sgpe->length; + while (src && protsegcnt) { + while (len) { + + /* + * First check to see if a protection data + * check is valid + */ + if ((src->ref_tag == T10_PI_REF_ESCAPE) || + (src->app_tag == T10_PI_APP_ESCAPE)) { + start_ref_tag++; + goto skipit; + } + + /* First Guard Tag checking */ + if (chk_guard) { + guard_tag = src->guard_tag; + if (cmd->prot_flags + & SCSI_PROT_IP_CHECKSUM) + sum = lpfc_bg_csum(data_src, + blksize); + else + sum = lpfc_bg_crc(data_src, + blksize); + if ((guard_tag != sum)) { + err_type = BGS_GUARD_ERR_MASK; + goto out; + } + } + + /* Reference Tag checking */ + ref_tag = be32_to_cpu(src->ref_tag); + if (chk_ref && (ref_tag != start_ref_tag)) { + err_type = BGS_REFTAG_ERR_MASK; + goto out; + } + start_ref_tag++; + + /* App Tag checking */ + app_tag = src->app_tag; + if (chk_app && (app_tag != start_app_tag)) { + err_type = BGS_APPTAG_ERR_MASK; + goto out; + } +skipit: + len -= sizeof(struct scsi_dif_tuple); + if (len < 0) + len = 0; + src++; + + data_src += blksize; + data_len -= blksize; + + /* + * Are we at the end of the Data segment? + * The data segment is only used for Guard + * tag checking. + */ + if (chk_guard && (data_len == 0)) { + chk_guard = 0; + sgde = sg_next(sgde); + if (!sgde) + goto out; + + data_src = (uint8_t *)sg_virt(sgde); + data_len = sgde->length; + if ((data_len & (blksize - 1)) == 0) + chk_guard = 1; + } + } + + /* Goto the next Protection data segment */ + sgpe = sg_next(sgpe); + if (sgpe) { + src = (struct scsi_dif_tuple *)sg_virt(sgpe); + len = sgpe->length; + } else { + src = NULL; + } + protsegcnt--; + } + } +out: + if (err_type == BGS_GUARD_ERR_MASK) { + scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1); + set_host_byte(cmd, DID_ABORT); + phba->bg_guard_err_cnt++; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9069 BLKGRD: reftag %x grd_tag err %x != %x\n", + scsi_prot_ref_tag(cmd), + sum, guard_tag); + + } else if (err_type == BGS_REFTAG_ERR_MASK) { + scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3); + set_host_byte(cmd, DID_ABORT); + + phba->bg_reftag_err_cnt++; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9066 BLKGRD: reftag %x ref_tag err %x != %x\n", + scsi_prot_ref_tag(cmd), + ref_tag, start_ref_tag); + + } else if (err_type == BGS_APPTAG_ERR_MASK) { + scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2); + set_host_byte(cmd, DID_ABORT); + + phba->bg_apptag_err_cnt++; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9041 BLKGRD: reftag %x app_tag err %x != %x\n", + scsi_prot_ref_tag(cmd), + app_tag, start_app_tag); + } +} + +/* + * This function checks for BlockGuard errors detected by + * the HBA. In case of errors, the ASC/ASCQ fields in the + * sense buffer will be set accordingly, paired with + * ILLEGAL_REQUEST to signal to the kernel that the HBA + * detected corruption. + * + * Returns: + * 0 - No error found + * 1 - BlockGuard error found + * -1 - Internal error (bad profile, ...etc) + */ +static int +lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd, + struct lpfc_iocbq *pIocbOut) +{ + struct scsi_cmnd *cmd = lpfc_cmd->pCmd; + struct sli3_bg_fields *bgf; + int ret = 0; + struct lpfc_wcqe_complete *wcqe; + u32 status; + u32 bghm = 0; + u32 bgstat = 0; + u64 failing_sector = 0; + + if (phba->sli_rev == LPFC_SLI_REV4) { + wcqe = &pIocbOut->wcqe_cmpl; + status = bf_get(lpfc_wcqe_c_status, wcqe); + + if (status == CQE_STATUS_DI_ERROR) { + /* Guard Check failed */ + if (bf_get(lpfc_wcqe_c_bg_ge, wcqe)) + bgstat |= BGS_GUARD_ERR_MASK; + + /* AppTag Check failed */ + if (bf_get(lpfc_wcqe_c_bg_ae, wcqe)) + bgstat |= BGS_APPTAG_ERR_MASK; + + /* RefTag Check failed */ + if (bf_get(lpfc_wcqe_c_bg_re, wcqe)) + bgstat |= BGS_REFTAG_ERR_MASK; + + /* Check to see if there was any good data before the + * error + */ + if (bf_get(lpfc_wcqe_c_bg_tdpv, wcqe)) { + bgstat |= BGS_HI_WATER_MARK_PRESENT_MASK; + bghm = wcqe->total_data_placed; + } + + /* + * Set ALL the error bits to indicate we don't know what + * type of error it is. + */ + if (!bgstat) + bgstat |= (BGS_REFTAG_ERR_MASK | + BGS_APPTAG_ERR_MASK | + BGS_GUARD_ERR_MASK); + } + + } else { + bgf = &pIocbOut->iocb.unsli3.sli3_bg; + bghm = bgf->bghm; + bgstat = bgf->bgstat; + } + + if (lpfc_bgs_get_invalid_prof(bgstat)) { + cmd->result = DID_ERROR << 16; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9072 BLKGRD: Invalid BG Profile in cmd " + "0x%x reftag 0x%x blk cnt 0x%x " + "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], + scsi_prot_ref_tag(cmd), + scsi_logical_block_count(cmd), bgstat, bghm); + ret = (-1); + goto out; + } + + if (lpfc_bgs_get_uninit_dif_block(bgstat)) { + cmd->result = DID_ERROR << 16; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9073 BLKGRD: Invalid BG PDIF Block in cmd " + "0x%x reftag 0x%x blk cnt 0x%x " + "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], + scsi_prot_ref_tag(cmd), + scsi_logical_block_count(cmd), bgstat, bghm); + ret = (-1); + goto out; + } + + if (lpfc_bgs_get_guard_err(bgstat)) { + ret = 1; + scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1); + set_host_byte(cmd, DID_ABORT); + phba->bg_guard_err_cnt++; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9055 BLKGRD: Guard Tag error in cmd " + "0x%x reftag 0x%x blk cnt 0x%x " + "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], + scsi_prot_ref_tag(cmd), + scsi_logical_block_count(cmd), bgstat, bghm); + } + + if (lpfc_bgs_get_reftag_err(bgstat)) { + ret = 1; + scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3); + set_host_byte(cmd, DID_ABORT); + phba->bg_reftag_err_cnt++; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9056 BLKGRD: Ref Tag error in cmd " + "0x%x reftag 0x%x blk cnt 0x%x " + "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], + scsi_prot_ref_tag(cmd), + scsi_logical_block_count(cmd), bgstat, bghm); + } + + if (lpfc_bgs_get_apptag_err(bgstat)) { + ret = 1; + scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2); + set_host_byte(cmd, DID_ABORT); + phba->bg_apptag_err_cnt++; + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9061 BLKGRD: App Tag error in cmd " + "0x%x reftag 0x%x blk cnt 0x%x " + "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], + scsi_prot_ref_tag(cmd), + scsi_logical_block_count(cmd), bgstat, bghm); + } + + if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { + /* + * setup sense data descriptor 0 per SPC-4 as an information + * field, and put the failing LBA in it. + * This code assumes there was also a guard/app/ref tag error + * indication. + */ + cmd->sense_buffer[7] = 0xc; /* Additional sense length */ + cmd->sense_buffer[8] = 0; /* Information descriptor type */ + cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ + cmd->sense_buffer[10] = 0x80; /* Validity bit */ + + /* bghm is a "on the wire" FC frame based count */ + switch (scsi_get_prot_op(cmd)) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + bghm /= cmd->device->sector_size; + break; + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + bghm /= (cmd->device->sector_size + + sizeof(struct scsi_dif_tuple)); + break; + } + + failing_sector = scsi_get_lba(cmd); + failing_sector += bghm; + + /* Descriptor Information */ + put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); + } + + if (!ret) { + /* No error was reported - problem in FW? */ + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, + "9057 BLKGRD: Unknown error in cmd " + "0x%x reftag 0x%x blk cnt 0x%x " + "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], + scsi_prot_ref_tag(cmd), + scsi_logical_block_count(cmd), bgstat, bghm); + + /* Calculate what type of error it was */ + lpfc_calc_bg_err(phba, lpfc_cmd); + } +out: + return ret; +} + +/** + * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * + * This routine does the pci dma mapping for scatter-gather list of scsi cmnd + * field of @lpfc_cmd for device with SLI-4 interface spec. + * + * Return codes: + * 2 - Error - Do not retry + * 1 - Error - Retry + * 0 - Success + **/ +static int +lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd) +{ + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct scatterlist *sgel = NULL; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl; + struct sli4_sge *first_data_sgl; + struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq; + struct lpfc_vport *vport = phba->pport; + union lpfc_wqe128 *wqe = &pwqeq->wqe; + dma_addr_t physaddr; + uint32_t dma_len; + uint32_t dma_offset = 0; + int nseg, i, j; + struct ulp_bde64 *bde; + bool lsp_just_set = false; + struct sli4_hybrid_sgl *sgl_xtra = NULL; + + /* + * There are three possibilities here - use scatter-gather segment, use + * the single mapping, or neither. Start the lpfc command prep by + * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first + * data bde entry. + */ + if (scsi_sg_count(scsi_cmnd)) { + /* + * The driver stores the segment count returned from dma_map_sg + * because this a count of dma-mappings used to map the use_sg + * pages. They are not guaranteed to be the same for those + * architectures that implement an IOMMU. + */ + + nseg = scsi_dma_map(scsi_cmnd); + if (unlikely(nseg <= 0)) + return 1; + sgl += 1; + /* clear the last flag in the fcp_rsp map entry */ + sgl->word2 = le32_to_cpu(sgl->word2); + bf_set(lpfc_sli4_sge_last, sgl, 0); + sgl->word2 = cpu_to_le32(sgl->word2); + sgl += 1; + first_data_sgl = sgl; + lpfc_cmd->seg_cnt = nseg; + if (!phba->cfg_xpsgl && + lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9074 BLKGRD:" + " %s: Too many sg segments from " + "dma_map_sg. Config %d, seg_cnt %d\n", + __func__, phba->cfg_sg_seg_cnt, + lpfc_cmd->seg_cnt); + WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt); + lpfc_cmd->seg_cnt = 0; + scsi_dma_unmap(scsi_cmnd); + return 2; + } + + /* + * The driver established a maximum scatter-gather segment count + * during probe that limits the number of sg elements in any + * single scsi command. Just run through the seg_cnt and format + * the sge's. + * When using SLI-3 the driver will try to fit all the BDEs into + * the IOCB. If it can't then the BDEs get added to a BPL as it + * does for SLI-2 mode. + */ + + /* for tracking segment boundaries */ + sgel = scsi_sglist(scsi_cmnd); + j = 2; + for (i = 0; i < nseg; i++) { + 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); + + /* do we need to 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_cmd); + + if (unlikely(!sgl_xtra)) { + lpfc_cmd->seg_cnt = 0; + scsi_dma_unmap(scsi_cmnd); + 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(sgel); + dma_len = sg_dma_len(sgel); + 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; + sgel = sg_next(sgel); + + 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. + * For FCoE, we key off Performance Hints. + * For FC, we key off lpfc_enable_pbde. + */ + if (nseg == 1 && + ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) || + 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 { + sgl += 1; + /* set the last flag in the fcp_rsp map entry */ + sgl->word2 = le32_to_cpu(sgl->word2); + bf_set(lpfc_sli4_sge_last, sgl, 1); + sgl->word2 = cpu_to_le32(sgl->word2); + + if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) || + phba->cfg_enable_pbde) { + bde = (struct ulp_bde64 *) + &wqe->words[13]; + memset(bde, 0, (sizeof(uint32_t) * 3)); + } + } + + /* + * Finish initializing those IOCB fields that are dependent on the + * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is + * explicitly reinitialized. + * all iocb memory resources are reused. + */ + fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); + /* Set first-burst provided it was successfully negotiated */ + if (!(phba->hba_flag & HBA_FCOE_MODE) && + vport->cfg_first_burst_size && + scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) { + u32 init_len, total_len; + + total_len = be32_to_cpu(fcp_cmnd->fcpDl); + init_len = min(total_len, vport->cfg_first_burst_size); + + /* Word 4 & 5 */ + wqe->fcp_iwrite.initial_xfer_len = init_len; + wqe->fcp_iwrite.total_xfer_len = total_len; + } else { + /* Word 4 */ + wqe->fcp_iwrite.total_xfer_len = + be32_to_cpu(fcp_cmnd->fcpDl); + } + + /* + * If the OAS driver feature is enabled and the lun is enabled for + * OAS, set the oas iocb related flags. + */ + if ((phba->cfg_fof) && ((struct lpfc_device_data *) + scsi_cmnd->device->hostdata)->oas_enabled) { + lpfc_cmd->cur_iocbq.cmd_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); + lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *) + scsi_cmnd->device->hostdata)->priority; + + /* Word 10 */ + bf_set(wqe_oas, &wqe->generic.wqe_com, 1); + bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1); + + if (lpfc_cmd->cur_iocbq.priority) + bf_set(wqe_ccp, &wqe->generic.wqe_com, + (lpfc_cmd->cur_iocbq.priority << 1)); + else + bf_set(wqe_ccp, &wqe->generic.wqe_com, + (phba->cfg_XLanePriority << 1)); + } + + return 0; +} + +/** + * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * + * This is the protection/DIF aware version of + * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the + * two functions eventually, but for now, it's here + * Return codes: + * 2 - Error - Do not retry + * 1 - Error - Retry + * 0 - Success + **/ +static int +lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, + struct lpfc_io_buf *lpfc_cmd) +{ + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->dma_sgl); + struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq; + union lpfc_wqe128 *wqe = &pwqeq->wqe; + uint32_t num_sge = 0; + int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; + int prot_group_type = 0; + int fcpdl; + int ret = 1; + struct lpfc_vport *vport = phba->pport; + + /* + * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd + * fcp_rsp regions to the first data sge entry + */ + if (scsi_sg_count(scsi_cmnd)) { + /* + * The driver stores the segment count returned from dma_map_sg + * because this a count of dma-mappings used to map the use_sg + * pages. They are not guaranteed to be the same for those + * architectures that implement an IOMMU. + */ + datasegcnt = dma_map_sg(&phba->pcidev->dev, + scsi_sglist(scsi_cmnd), + scsi_sg_count(scsi_cmnd), datadir); + if (unlikely(!datasegcnt)) + return 1; + + sgl += 1; + /* clear the last flag in the fcp_rsp map entry */ + sgl->word2 = le32_to_cpu(sgl->word2); + bf_set(lpfc_sli4_sge_last, sgl, 0); + sgl->word2 = cpu_to_le32(sgl->word2); + + sgl += 1; + lpfc_cmd->seg_cnt = datasegcnt; + + /* First check if data segment count from SCSI Layer is good */ + if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt && + !phba->cfg_xpsgl) { + WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt); + ret = 2; + goto err; + } + + prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); + + switch (prot_group_type) { + case LPFC_PG_TYPE_NO_DIF: + /* Here we need to add a DISEED to the count */ + if (((lpfc_cmd->seg_cnt + 1) > + phba->cfg_total_seg_cnt) && + !phba->cfg_xpsgl) { + ret = 2; + goto err; + } + + num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, + datasegcnt, lpfc_cmd); + + /* we should have 2 or more entries in buffer list */ + if (num_sge < 2) { + ret = 2; + goto err; + } + break; + + case LPFC_PG_TYPE_DIF_BUF: + /* + * This type indicates that protection buffers are + * passed to the driver, so that needs to be prepared + * for DMA + */ + protsegcnt = dma_map_sg(&phba->pcidev->dev, + scsi_prot_sglist(scsi_cmnd), + scsi_prot_sg_count(scsi_cmnd), datadir); + if (unlikely(!protsegcnt)) { + scsi_dma_unmap(scsi_cmnd); + return 1; + } + + lpfc_cmd->prot_seg_cnt = protsegcnt; + /* + * There is a minimun of 3 SGEs used for every + * protection data segment. + */ + if (((lpfc_cmd->prot_seg_cnt * 3) > + (phba->cfg_total_seg_cnt - 2)) && + !phba->cfg_xpsgl) { + ret = 2; + goto err; + } + + num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, + datasegcnt, protsegcnt, lpfc_cmd); + + /* we should have 3 or more entries in buffer list */ + if (num_sge < 3 || + (num_sge > phba->cfg_total_seg_cnt && + !phba->cfg_xpsgl)) { + ret = 2; + goto err; + } + break; + + case LPFC_PG_TYPE_INVALID: + default: + scsi_dma_unmap(scsi_cmnd); + lpfc_cmd->seg_cnt = 0; + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9083 Unexpected protection group %i\n", + prot_group_type); + return 2; + } + } + + switch (scsi_get_prot_op(scsi_cmnd)) { + case SCSI_PROT_WRITE_STRIP: + case SCSI_PROT_READ_STRIP: + lpfc_cmd->cur_iocbq.cmd_flag |= LPFC_IO_DIF_STRIP; + break; + case SCSI_PROT_WRITE_INSERT: + case SCSI_PROT_READ_INSERT: + lpfc_cmd->cur_iocbq.cmd_flag |= LPFC_IO_DIF_INSERT; + break; + case SCSI_PROT_WRITE_PASS: + case SCSI_PROT_READ_PASS: + lpfc_cmd->cur_iocbq.cmd_flag |= LPFC_IO_DIF_PASS; + break; + } + + fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); + fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); + + /* Set first-burst provided it was successfully negotiated */ + if (!(phba->hba_flag & HBA_FCOE_MODE) && + vport->cfg_first_burst_size && + scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) { + u32 init_len, total_len; + + total_len = be32_to_cpu(fcp_cmnd->fcpDl); + init_len = min(total_len, vport->cfg_first_burst_size); + + /* Word 4 & 5 */ + wqe->fcp_iwrite.initial_xfer_len = init_len; + wqe->fcp_iwrite.total_xfer_len = total_len; + } else { + /* Word 4 */ + wqe->fcp_iwrite.total_xfer_len = + be32_to_cpu(fcp_cmnd->fcpDl); + } + + /* + * If the OAS driver feature is enabled and the lun is enabled for + * OAS, set the oas iocb related flags. + */ + if ((phba->cfg_fof) && ((struct lpfc_device_data *) + scsi_cmnd->device->hostdata)->oas_enabled) { + lpfc_cmd->cur_iocbq.cmd_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); + + /* Word 10 */ + bf_set(wqe_oas, &wqe->generic.wqe_com, 1); + bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1); + bf_set(wqe_ccp, &wqe->generic.wqe_com, + (phba->cfg_XLanePriority << 1)); + } + + /* Word 7. DIF Flags */ + if (lpfc_cmd->cur_iocbq.cmd_flag & LPFC_IO_DIF_PASS) + bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_PASSTHRU); + else if (lpfc_cmd->cur_iocbq.cmd_flag & LPFC_IO_DIF_STRIP) + bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_STRIP); + else if (lpfc_cmd->cur_iocbq.cmd_flag & LPFC_IO_DIF_INSERT) + bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_INSERT); + + lpfc_cmd->cur_iocbq.cmd_flag &= ~(LPFC_IO_DIF_PASS | + LPFC_IO_DIF_STRIP | LPFC_IO_DIF_INSERT); + + return 0; +err: + if (lpfc_cmd->seg_cnt) + scsi_dma_unmap(scsi_cmnd); + if (lpfc_cmd->prot_seg_cnt) + dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), + scsi_prot_sg_count(scsi_cmnd), + scsi_cmnd->sc_data_direction); + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9084 Cannot setup S/G List for HBA " + "IO segs %d/%d SGL %d SCSI %d: %d %d %d\n", + lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, + phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, + prot_group_type, num_sge, ret); + + lpfc_cmd->seg_cnt = 0; + lpfc_cmd->prot_seg_cnt = 0; + return ret; +} + +/** + * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * + * This routine wraps the actual DMA mapping function pointer from the + * lpfc_hba struct. + * + * Return codes: + * 1 - Error + * 0 - Success + **/ +static inline int +lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd) +{ + return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); +} + +/** + * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer + * using BlockGuard. + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * + * This routine wraps the actual DMA mapping function pointer from the + * lpfc_hba struct. + * + * Return codes: + * 1 - Error + * 0 - Success + **/ +static inline int +lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd) +{ + return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); +} + +/** + * lpfc_scsi_prep_cmnd_buf - Wrapper function for IOCB/WQE mapping of scsi + * buffer + * @vport: Pointer to vport object. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * @tmo: Timeout value for IO + * + * This routine initializes IOCB/WQE data structure from scsi command + * + * Return codes: + * 1 - Error + * 0 - Success + **/ +static inline int +lpfc_scsi_prep_cmnd_buf(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd, + uint8_t tmo) +{ + return vport->phba->lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, tmo); +} + +/** + * lpfc_send_scsi_error_event - Posts an event when there is SCSI error + * @phba: Pointer to hba context object. + * @vport: Pointer to vport object. + * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. + * @fcpi_parm: FCP Initiator parameter. + * + * This function posts an event when there is a SCSI command reporting + * error from the scsi device. + **/ +static void +lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, + struct lpfc_io_buf *lpfc_cmd, uint32_t fcpi_parm) { + struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; + struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; + uint32_t resp_info = fcprsp->rspStatus2; + uint32_t scsi_status = fcprsp->rspStatus3; + struct lpfc_fast_path_event *fast_path_evt = NULL; + struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; + unsigned long flags; + + if (!pnode) + return; + + /* If there is queuefull or busy condition send a scsi event */ + if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || + (cmnd->result == SAM_STAT_BUSY)) { + fast_path_evt = lpfc_alloc_fast_evt(phba); + if (!fast_path_evt) + return; + fast_path_evt->un.scsi_evt.event_type = + FC_REG_SCSI_EVENT; + fast_path_evt->un.scsi_evt.subcategory = + (cmnd->result == SAM_STAT_TASK_SET_FULL) ? + LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; + fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; + memcpy(&fast_path_evt->un.scsi_evt.wwpn, + &pnode->nlp_portname, sizeof(struct lpfc_name)); + memcpy(&fast_path_evt->un.scsi_evt.wwnn, + &pnode->nlp_nodename, sizeof(struct lpfc_name)); + } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && + ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { + fast_path_evt = lpfc_alloc_fast_evt(phba); + if (!fast_path_evt) + return; + fast_path_evt->un.check_cond_evt.scsi_event.event_type = + FC_REG_SCSI_EVENT; + fast_path_evt->un.check_cond_evt.scsi_event.subcategory = + LPFC_EVENT_CHECK_COND; + fast_path_evt->un.check_cond_evt.scsi_event.lun = + cmnd->device->lun; + memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, + &pnode->nlp_portname, sizeof(struct lpfc_name)); + memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, + &pnode->nlp_nodename, sizeof(struct lpfc_name)); + fast_path_evt->un.check_cond_evt.sense_key = + cmnd->sense_buffer[2] & 0xf; + fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; + fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; + } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && + fcpi_parm && + ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || + ((scsi_status == SAM_STAT_GOOD) && + !(resp_info & (RESID_UNDER | RESID_OVER))))) { + /* + * If status is good or resid does not match with fcp_param and + * there is valid fcpi_parm, then there is a read_check error + */ + fast_path_evt = lpfc_alloc_fast_evt(phba); + if (!fast_path_evt) + return; + fast_path_evt->un.read_check_error.header.event_type = + FC_REG_FABRIC_EVENT; + fast_path_evt->un.read_check_error.header.subcategory = + LPFC_EVENT_FCPRDCHKERR; + memcpy(&fast_path_evt->un.read_check_error.header.wwpn, + &pnode->nlp_portname, sizeof(struct lpfc_name)); + memcpy(&fast_path_evt->un.read_check_error.header.wwnn, + &pnode->nlp_nodename, sizeof(struct lpfc_name)); + fast_path_evt->un.read_check_error.lun = cmnd->device->lun; + fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; + fast_path_evt->un.read_check_error.fcpiparam = + fcpi_parm; + } else + return; + + fast_path_evt->vport = vport; + spin_lock_irqsave(&phba->hbalock, flags); + list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); + spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_worker_wake_up(phba); + return; +} + +/** + * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev + * @phba: The HBA for which this call is being executed. + * @psb: The scsi buffer which is going to be un-mapped. + * + * This routine does DMA un-mapping of scatter gather list of scsi command + * field of @lpfc_cmd for device with SLI-3 interface spec. + **/ +static void +lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb) +{ + /* + * There are only two special cases to consider. (1) the scsi command + * requested scatter-gather usage or (2) the scsi command allocated + * a request buffer, but did not request use_sg. There is a third + * case, but it does not require resource deallocation. + */ + if (psb->seg_cnt > 0) + scsi_dma_unmap(psb->pCmd); + if (psb->prot_seg_cnt > 0) + dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), + scsi_prot_sg_count(psb->pCmd), + psb->pCmd->sc_data_direction); +} + +/** + * lpfc_unblock_requests - allow further commands to be queued. + * @phba: pointer to phba object + * + * For single vport, just call scsi_unblock_requests on physical port. + * For multiple vports, send scsi_unblock_requests for all the vports. + */ +void +lpfc_unblock_requests(struct lpfc_hba *phba) +{ + struct lpfc_vport **vports; + struct Scsi_Host *shost; + int i; + + if (phba->sli_rev == LPFC_SLI_REV4 && + !phba->sli4_hba.max_cfg_param.vpi_used) { + shost = lpfc_shost_from_vport(phba->pport); + scsi_unblock_requests(shost); + return; + } + + vports = lpfc_create_vport_work_array(phba); + if (vports != NULL) + for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { + shost = lpfc_shost_from_vport(vports[i]); + scsi_unblock_requests(shost); + } + lpfc_destroy_vport_work_array(phba, vports); +} + +/** + * lpfc_block_requests - prevent further commands from being queued. + * @phba: pointer to phba object + * + * For single vport, just call scsi_block_requests on physical port. + * For multiple vports, send scsi_block_requests for all the vports. + */ +void +lpfc_block_requests(struct lpfc_hba *phba) +{ + struct lpfc_vport **vports; + struct Scsi_Host *shost; + int i; + + if (atomic_read(&phba->cmf_stop_io)) + return; + + if (phba->sli_rev == LPFC_SLI_REV4 && + !phba->sli4_hba.max_cfg_param.vpi_used) { + shost = lpfc_shost_from_vport(phba->pport); + scsi_block_requests(shost); + return; + } + + vports = lpfc_create_vport_work_array(phba); + if (vports != NULL) + for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { + shost = lpfc_shost_from_vport(vports[i]); + scsi_block_requests(shost); + } + lpfc_destroy_vport_work_array(phba, vports); +} + +/** + * lpfc_update_cmf_cmpl - Adjust CMF counters for IO completion + * @phba: The HBA for which this call is being executed. + * @time: The latency of the IO that completed (in ns) + * @size: The size of the IO that completed + * @shost: SCSI host the IO completed on (NULL for a NVME IO) + * + * The routine adjusts the various Burst and Bandwidth counters used in + * Congestion management and E2E. If time is set to LPFC_CGN_NOT_SENT, + * that means the IO was never issued to the HBA, so this routine is + * just being called to cleanup the counter from a previous + * lpfc_update_cmf_cmd call. + */ +int +lpfc_update_cmf_cmpl(struct lpfc_hba *phba, + uint64_t time, uint32_t size, struct Scsi_Host *shost) +{ + struct lpfc_cgn_stat *cgs; + + if (time != LPFC_CGN_NOT_SENT) { + /* lat is ns coming in, save latency in us */ + if (time < 1000) + time = 1; + else + time = div_u64(time + 500, 1000); /* round it */ + + cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id()); + atomic64_add(size, &cgs->rcv_bytes); + atomic64_add(time, &cgs->rx_latency); + atomic_inc(&cgs->rx_io_cnt); + } + return 0; +} + +/** + * lpfc_update_cmf_cmd - Adjust CMF counters for IO submission + * @phba: The HBA for which this call is being executed. + * @size: The size of the IO that will be issued + * + * The routine adjusts the various Burst and Bandwidth counters used in + * Congestion management and E2E. + */ +int +lpfc_update_cmf_cmd(struct lpfc_hba *phba, uint32_t size) +{ + uint64_t total; + struct lpfc_cgn_stat *cgs; + int cpu; + + /* At this point we are either LPFC_CFG_MANAGED or LPFC_CFG_MONITOR */ + if (phba->cmf_active_mode == LPFC_CFG_MANAGED && + phba->cmf_max_bytes_per_interval) { + total = 0; + for_each_present_cpu(cpu) { + cgs = per_cpu_ptr(phba->cmf_stat, cpu); + total += atomic64_read(&cgs->total_bytes); + } + if (total >= phba->cmf_max_bytes_per_interval) { + if (!atomic_xchg(&phba->cmf_bw_wait, 1)) { + lpfc_block_requests(phba); + phba->cmf_last_ts = + lpfc_calc_cmf_latency(phba); + } + atomic_inc(&phba->cmf_busy); + return -EBUSY; + } + if (size > atomic_read(&phba->rx_max_read_cnt)) + atomic_set(&phba->rx_max_read_cnt, size); + } + + cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id()); + atomic64_add(size, &cgs->total_bytes); + return 0; +} + +/** + * lpfc_handle_fcp_err - FCP response handler + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: Pointer to lpfc_io_buf data structure. + * @fcpi_parm: FCP Initiator parameter. + * + * This routine is called to process response IOCB with status field + * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command + * based upon SCSI and FCP error. + **/ +static void +lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd, + uint32_t fcpi_parm) +{ + struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; + struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; + uint32_t resp_info = fcprsp->rspStatus2; + uint32_t scsi_status = fcprsp->rspStatus3; + uint32_t *lp; + uint32_t host_status = DID_OK; + uint32_t rsplen = 0; + uint32_t fcpDl; + uint32_t logit = LOG_FCP | LOG_FCP_ERROR; + + + /* + * If this is a task management command, there is no + * scsi packet associated with this lpfc_cmd. The driver + * consumes it. + */ + if (fcpcmd->fcpCntl2) { + scsi_status = 0; + goto out; + } + + if (resp_info & RSP_LEN_VALID) { + rsplen = be32_to_cpu(fcprsp->rspRspLen); + if (rsplen != 0 && rsplen != 4 && rsplen != 8) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "2719 Invalid response length: " + "tgt x%x lun x%llx cmnd x%x rsplen " + "x%x\n", cmnd->device->id, + cmnd->device->lun, cmnd->cmnd[0], + rsplen); + host_status = DID_ERROR; + goto out; + } + if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "2757 Protocol failure detected during " + "processing of FCP I/O op: " + "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n", + cmnd->device->id, + cmnd->device->lun, cmnd->cmnd[0], + fcprsp->rspInfo3); + host_status = DID_ERROR; + goto out; + } + } + + if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { + uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); + if (snslen > SCSI_SENSE_BUFFERSIZE) + snslen = SCSI_SENSE_BUFFERSIZE; + + if (resp_info & RSP_LEN_VALID) + rsplen = be32_to_cpu(fcprsp->rspRspLen); + memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); + } + lp = (uint32_t *)cmnd->sense_buffer; + + /* special handling for under run conditions */ + if (!scsi_status && (resp_info & RESID_UNDER)) { + /* don't log under runs if fcp set... */ + if (vport->cfg_log_verbose & LOG_FCP) + logit = LOG_FCP_ERROR; + /* unless operator says so */ + if (vport->cfg_log_verbose & LOG_FCP_UNDER) + logit = LOG_FCP_UNDER; + } + + lpfc_printf_vlog(vport, KERN_WARNING, logit, + "9024 FCP command x%x failed: x%x SNS x%x x%x " + "Data: x%x x%x x%x x%x x%x\n", + cmnd->cmnd[0], scsi_status, + be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, + be32_to_cpu(fcprsp->rspResId), + be32_to_cpu(fcprsp->rspSnsLen), + be32_to_cpu(fcprsp->rspRspLen), + fcprsp->rspInfo3); + + scsi_set_resid(cmnd, 0); + fcpDl = be32_to_cpu(fcpcmd->fcpDl); + if (resp_info & RESID_UNDER) { + scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); + + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, + "9025 FCP Underrun, expected %d, " + "residual %d Data: x%x x%x x%x\n", + fcpDl, + scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], + cmnd->underflow); + + /* + * If there is an under run, check if under run reported by + * storage array is same as the under run reported by HBA. + * If this is not same, there is a dropped frame. + */ + if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) { + lpfc_printf_vlog(vport, KERN_WARNING, + LOG_FCP | LOG_FCP_ERROR, + "9026 FCP Read Check Error " + "and Underrun Data: x%x x%x x%x x%x\n", + fcpDl, + scsi_get_resid(cmnd), fcpi_parm, + cmnd->cmnd[0]); + scsi_set_resid(cmnd, scsi_bufflen(cmnd)); + host_status = DID_ERROR; + } + /* + * The cmnd->underflow is the minimum number of bytes that must + * be transferred for this command. Provided a sense condition + * is not present, make sure the actual amount transferred is at + * least the underflow value or fail. + */ + if (!(resp_info & SNS_LEN_VALID) && + (scsi_status == SAM_STAT_GOOD) && + (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) + < cmnd->underflow)) { + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "9027 FCP command x%x residual " + "underrun converted to error " + "Data: x%x x%x x%x\n", + cmnd->cmnd[0], scsi_bufflen(cmnd), + scsi_get_resid(cmnd), cmnd->underflow); + host_status = DID_ERROR; + } + } else if (resp_info & RESID_OVER) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "9028 FCP command x%x residual overrun error. " + "Data: x%x x%x\n", cmnd->cmnd[0], + scsi_bufflen(cmnd), scsi_get_resid(cmnd)); + host_status = DID_ERROR; + + /* + * Check SLI validation that all the transfer was actually done + * (fcpi_parm should be zero). Apply check only to reads. + */ + } else if (fcpi_parm) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, + "9029 FCP %s Check Error Data: " + "x%x x%x x%x x%x x%x\n", + ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ? + "Read" : "Write"), + fcpDl, be32_to_cpu(fcprsp->rspResId), + fcpi_parm, cmnd->cmnd[0], scsi_status); + + /* There is some issue with the LPe12000 that causes it + * to miscalculate the fcpi_parm and falsely trip this + * recovery logic. Detect this case and don't error when true. + */ + if (fcpi_parm > fcpDl) + goto out; + + switch (scsi_status) { + case SAM_STAT_GOOD: + case SAM_STAT_CHECK_CONDITION: + /* Fabric dropped a data frame. Fail any successful + * command in which we detected dropped frames. + * A status of good or some check conditions could + * be considered a successful command. + */ + host_status = DID_ERROR; + break; + } + scsi_set_resid(cmnd, scsi_bufflen(cmnd)); + } + + out: + cmnd->result = host_status << 16 | scsi_status; + lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, fcpi_parm); +} + +/** + * lpfc_fcp_io_cmd_wqe_cmpl - Complete a FCP IO + * @phba: The hba for which this call is being executed. + * @pwqeIn: The command WQE for the scsi cmnd. + * @pwqeOut: Pointer to driver response WQE object. + * + * This routine assigns scsi command result by looking into response WQE + * status field appropriately. This routine handles QUEUE FULL condition as + * well by ramping down device queue depth. + **/ +static void +lpfc_fcp_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn, + struct lpfc_iocbq *pwqeOut) +{ + struct lpfc_io_buf *lpfc_cmd = pwqeIn->io_buf; + struct lpfc_wcqe_complete *wcqe = &pwqeOut->wcqe_cmpl; + struct lpfc_vport *vport = pwqeIn->vport; + struct lpfc_rport_data *rdata; + struct lpfc_nodelist *ndlp; + struct scsi_cmnd *cmd; + unsigned long flags; + struct lpfc_fast_path_event *fast_path_evt; + struct Scsi_Host *shost; + u32 logit = LOG_FCP; + u32 idx; + u32 lat; + u8 wait_xb_clr = 0; + + /* Sanity check on return of outstanding command */ + if (!lpfc_cmd) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "9032 Null lpfc_cmd pointer. No " + "release, skip completion\n"); + return; + } + + rdata = lpfc_cmd->rdata; + ndlp = rdata->pnode; + + /* Sanity check on return of outstanding command */ + cmd = lpfc_cmd->pCmd; + if (!cmd) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "9042 I/O completion: Not an active IO\n"); + lpfc_release_scsi_buf(phba, lpfc_cmd); + return; + } + /* Guard against abort handler being called at same time */ + spin_lock(&lpfc_cmd->buf_lock); + idx = lpfc_cmd->cur_iocbq.hba_wqidx; + if (phba->sli4_hba.hdwq) + phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++; + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO)) + this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io); +#endif + shost = cmd->device->host; + + lpfc_cmd->status = bf_get(lpfc_wcqe_c_status, wcqe); + lpfc_cmd->result = (wcqe->parameter & IOERR_PARAM_MASK); + + lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY; + if (bf_get(lpfc_wcqe_c_xb, wcqe)) { + lpfc_cmd->flags |= LPFC_SBUF_XBUSY; + if (phba->cfg_fcp_wait_abts_rsp) + wait_xb_clr = 1; + } + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (lpfc_cmd->prot_data_type) { + struct scsi_dif_tuple *src = NULL; + + src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; + /* + * Used to restore any changes to protection + * data for error injection. + */ + switch (lpfc_cmd->prot_data_type) { + case LPFC_INJERR_REFTAG: + src->ref_tag = + lpfc_cmd->prot_data; + break; + case LPFC_INJERR_APPTAG: + src->app_tag = + (uint16_t)lpfc_cmd->prot_data; + break; + case LPFC_INJERR_GUARD: + src->guard_tag = + (uint16_t)lpfc_cmd->prot_data; + break; + default: + break; + } + + lpfc_cmd->prot_data = 0; + lpfc_cmd->prot_data_type = 0; + lpfc_cmd->prot_data_segment = NULL; + } +#endif + if (unlikely(lpfc_cmd->status)) { + if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && + !lpfc_cmd->fcp_rsp->rspStatus3 && + (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && + !(vport->cfg_log_verbose & LOG_FCP_UNDER)) + logit = 0; + else + logit = LOG_FCP | LOG_FCP_UNDER; + lpfc_printf_vlog(vport, KERN_WARNING, logit, + "9034 FCP cmd x%x failed <%d/%lld> " + "status: x%x result: x%x " + "sid: x%x did: x%x oxid: x%x " + "Data: x%x x%x x%x\n", + cmd->cmnd[0], + cmd->device ? cmd->device->id : 0xffff, + cmd->device ? cmd->device->lun : 0xffff, + lpfc_cmd->status, lpfc_cmd->result, + vport->fc_myDID, + (ndlp) ? ndlp->nlp_DID : 0, + lpfc_cmd->cur_iocbq.sli4_xritag, + wcqe->parameter, wcqe->total_data_placed, + lpfc_cmd->cur_iocbq.iotag); + } + + switch (lpfc_cmd->status) { + case CQE_STATUS_SUCCESS: + cmd->result = DID_OK << 16; + break; + case CQE_STATUS_FCP_RSP_FAILURE: + lpfc_handle_fcp_err(vport, lpfc_cmd, + pwqeIn->wqe.fcp_iread.total_xfer_len - + wcqe->total_data_placed); + break; + case CQE_STATUS_NPORT_BSY: + case CQE_STATUS_FABRIC_BSY: + cmd->result = DID_TRANSPORT_DISRUPTED << 16; + fast_path_evt = lpfc_alloc_fast_evt(phba); + if (!fast_path_evt) + break; + fast_path_evt->un.fabric_evt.event_type = + FC_REG_FABRIC_EVENT; + fast_path_evt->un.fabric_evt.subcategory = + (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? + LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; + if (ndlp) { + memcpy(&fast_path_evt->un.fabric_evt.wwpn, + &ndlp->nlp_portname, + sizeof(struct lpfc_name)); + memcpy(&fast_path_evt->un.fabric_evt.wwnn, + &ndlp->nlp_nodename, + sizeof(struct lpfc_name)); + } + fast_path_evt->vport = vport; + fast_path_evt->work_evt.evt = + LPFC_EVT_FASTPATH_MGMT_EVT; + spin_lock_irqsave(&phba->hbalock, flags); + list_add_tail(&fast_path_evt->work_evt.evt_listp, + &phba->work_list); + spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_worker_wake_up(phba); + lpfc_printf_vlog(vport, KERN_WARNING, logit, + "9035 Fabric/Node busy FCP cmd x%x failed" + " <%d/%lld> " + "status: x%x result: x%x " + "sid: x%x did: x%x oxid: x%x " + "Data: x%x x%x x%x\n", + cmd->cmnd[0], + cmd->device ? cmd->device->id : 0xffff, + cmd->device ? cmd->device->lun : 0xffff, + lpfc_cmd->status, lpfc_cmd->result, + vport->fc_myDID, + (ndlp) ? ndlp->nlp_DID : 0, + lpfc_cmd->cur_iocbq.sli4_xritag, + wcqe->parameter, + wcqe->total_data_placed, + lpfc_cmd->cur_iocbq.iocb.ulpIoTag); + break; + case CQE_STATUS_DI_ERROR: + if (bf_get(lpfc_wcqe_c_bg_edir, wcqe)) + lpfc_cmd->result = IOERR_RX_DMA_FAILED; + else + lpfc_cmd->result = IOERR_TX_DMA_FAILED; + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_BG, + "9048 DI Error xri x%x status x%x DI ext " + "status x%x data placed x%x\n", + lpfc_cmd->cur_iocbq.sli4_xritag, + lpfc_cmd->status, wcqe->parameter, + wcqe->total_data_placed); + if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { + /* BG enabled cmd. Parse BG error */ + lpfc_parse_bg_err(phba, lpfc_cmd, pwqeOut); + break; + } + cmd->result = DID_ERROR << 16; + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9040 DI Error on unprotected cmd\n"); + break; + case CQE_STATUS_REMOTE_STOP: + if (ndlp) { + /* This I/O was aborted by the target, we don't + * know the rxid and because we did not send the + * ABTS we cannot generate and RRQ. + */ + lpfc_set_rrq_active(phba, ndlp, + lpfc_cmd->cur_iocbq.sli4_lxritag, + 0, 0); + } + fallthrough; + case CQE_STATUS_LOCAL_REJECT: + if (lpfc_cmd->result & IOERR_DRVR_MASK) + lpfc_cmd->status = IOSTAT_DRIVER_REJECT; + if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || + lpfc_cmd->result == + IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || + lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || + lpfc_cmd->result == + IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { + cmd->result = DID_NO_CONNECT << 16; + break; + } + if (lpfc_cmd->result == IOERR_INVALID_RPI || + lpfc_cmd->result == IOERR_LINK_DOWN || + lpfc_cmd->result == IOERR_NO_RESOURCES || + lpfc_cmd->result == IOERR_ABORT_REQUESTED || + lpfc_cmd->result == IOERR_RPI_SUSPENDED || + lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { + cmd->result = DID_TRANSPORT_DISRUPTED << 16; + break; + } + lpfc_printf_vlog(vport, KERN_WARNING, logit, + "9036 Local Reject FCP cmd x%x failed" + " <%d/%lld> " + "status: x%x result: x%x " + "sid: x%x did: x%x oxid: x%x " + "Data: x%x x%x x%x\n", + cmd->cmnd[0], + cmd->device ? cmd->device->id : 0xffff, + cmd->device ? cmd->device->lun : 0xffff, + lpfc_cmd->status, lpfc_cmd->result, + vport->fc_myDID, + (ndlp) ? ndlp->nlp_DID : 0, + lpfc_cmd->cur_iocbq.sli4_xritag, + wcqe->parameter, + wcqe->total_data_placed, + lpfc_cmd->cur_iocbq.iocb.ulpIoTag); + fallthrough; + default: + cmd->result = DID_ERROR << 16; + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "9037 FCP Completion Error: xri %x " + "status x%x result x%x [x%x] " + "placed x%x\n", + lpfc_cmd->cur_iocbq.sli4_xritag, + lpfc_cmd->status, lpfc_cmd->result, + wcqe->parameter, + wcqe->total_data_placed); + } + if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { + u32 *lp = (u32 *)cmd->sense_buffer; + + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "9039 Iodone <%d/%llu> cmd x%px, error " + "x%x SNS x%x x%x LBA x%llx Data: x%x x%x\n", + cmd->device->id, cmd->device->lun, cmd, + cmd->result, *lp, *(lp + 3), + (cmd->device->sector_size) ? + (u64)scsi_get_lba(cmd) : 0, + cmd->retries, scsi_get_resid(cmd)); + } + + if (vport->cfg_max_scsicmpl_time && + time_after(jiffies, lpfc_cmd->start_time + + msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { + spin_lock_irqsave(shost->host_lock, flags); + if (ndlp) { + if (ndlp->cmd_qdepth > + atomic_read(&ndlp->cmd_pending) && + (atomic_read(&ndlp->cmd_pending) > + LPFC_MIN_TGT_QDEPTH) && + (cmd->cmnd[0] == READ_10 || + cmd->cmnd[0] == WRITE_10)) + ndlp->cmd_qdepth = + atomic_read(&ndlp->cmd_pending); + + ndlp->last_change_time = jiffies; + } + spin_unlock_irqrestore(shost->host_lock, flags); + } + lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (lpfc_cmd->ts_cmd_start) { + lpfc_cmd->ts_isr_cmpl = lpfc_cmd->cur_iocbq.isr_timestamp; + lpfc_cmd->ts_data_io = ktime_get_ns(); + phba->ktime_last_cmd = lpfc_cmd->ts_data_io; + lpfc_io_ktime(phba, lpfc_cmd); + } +#endif + if (likely(!wait_xb_clr)) + lpfc_cmd->pCmd = NULL; + spin_unlock(&lpfc_cmd->buf_lock); + + /* Check if IO qualified for CMF */ + if (phba->cmf_active_mode != LPFC_CFG_OFF && + cmd->sc_data_direction == DMA_FROM_DEVICE && + (scsi_sg_count(cmd))) { + /* Used when calculating average latency */ + lat = ktime_get_ns() - lpfc_cmd->rx_cmd_start; + lpfc_update_cmf_cmpl(phba, lat, scsi_bufflen(cmd), shost); + } + + if (wait_xb_clr) + goto out; + + /* The sdev is not guaranteed to be valid post scsi_done upcall. */ + scsi_done(cmd); + + /* + * If there is an abort thread waiting for command completion + * wake up the thread. + */ + spin_lock(&lpfc_cmd->buf_lock); + lpfc_cmd->cur_iocbq.cmd_flag &= ~LPFC_DRIVER_ABORTED; + if (lpfc_cmd->waitq) + wake_up(lpfc_cmd->waitq); + spin_unlock(&lpfc_cmd->buf_lock); +out: + lpfc_release_scsi_buf(phba, lpfc_cmd); +} + +/** + * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine + * @phba: The Hba for which this call is being executed. + * @pIocbIn: The command IOCBQ for the scsi cmnd. + * @pIocbOut: The response IOCBQ for the scsi cmnd. + * + * This routine assigns scsi command result by looking into response IOCB + * status field appropriately. This routine handles QUEUE FULL condition as + * well by ramping down device queue depth. + **/ +static void +lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, + struct lpfc_iocbq *pIocbOut) +{ + struct lpfc_io_buf *lpfc_cmd = + (struct lpfc_io_buf *) pIocbIn->io_buf; + struct lpfc_vport *vport = pIocbIn->vport; + struct lpfc_rport_data *rdata = lpfc_cmd->rdata; + struct lpfc_nodelist *pnode = rdata->pnode; + struct scsi_cmnd *cmd; + unsigned long flags; + struct lpfc_fast_path_event *fast_path_evt; + struct Scsi_Host *shost; + int idx; + uint32_t logit = LOG_FCP; + + /* Guard against abort handler being called at same time */ + spin_lock(&lpfc_cmd->buf_lock); + + /* Sanity check on return of outstanding command */ + cmd = lpfc_cmd->pCmd; + if (!cmd || !phba) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "2621 IO completion: Not an active IO\n"); + spin_unlock(&lpfc_cmd->buf_lock); + return; + } + + idx = lpfc_cmd->cur_iocbq.hba_wqidx; + if (phba->sli4_hba.hdwq) + phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++; + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO)) + this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io); +#endif + shost = cmd->device->host; + + lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); + lpfc_cmd->status = pIocbOut->iocb.ulpStatus; + /* pick up SLI4 exchange busy status from HBA */ + lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY; + if (pIocbOut->cmd_flag & LPFC_EXCHANGE_BUSY) + lpfc_cmd->flags |= LPFC_SBUF_XBUSY; + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (lpfc_cmd->prot_data_type) { + struct scsi_dif_tuple *src = NULL; + + src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; + /* + * Used to restore any changes to protection + * data for error injection. + */ + switch (lpfc_cmd->prot_data_type) { + case LPFC_INJERR_REFTAG: + src->ref_tag = + lpfc_cmd->prot_data; + break; + case LPFC_INJERR_APPTAG: + src->app_tag = + (uint16_t)lpfc_cmd->prot_data; + break; + case LPFC_INJERR_GUARD: + src->guard_tag = + (uint16_t)lpfc_cmd->prot_data; + break; + default: + break; + } + + lpfc_cmd->prot_data = 0; + lpfc_cmd->prot_data_type = 0; + lpfc_cmd->prot_data_segment = NULL; + } +#endif + + if (unlikely(lpfc_cmd->status)) { + if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && + (lpfc_cmd->result & IOERR_DRVR_MASK)) + lpfc_cmd->status = IOSTAT_DRIVER_REJECT; + else if (lpfc_cmd->status >= IOSTAT_CNT) + lpfc_cmd->status = IOSTAT_DEFAULT; + if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && + !lpfc_cmd->fcp_rsp->rspStatus3 && + (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && + !(vport->cfg_log_verbose & LOG_FCP_UNDER)) + logit = 0; + else + logit = LOG_FCP | LOG_FCP_UNDER; + lpfc_printf_vlog(vport, KERN_WARNING, logit, + "9030 FCP cmd x%x failed <%d/%lld> " + "status: x%x result: x%x " + "sid: x%x did: x%x oxid: x%x " + "Data: x%x x%x\n", + cmd->cmnd[0], + cmd->device ? cmd->device->id : 0xffff, + cmd->device ? cmd->device->lun : 0xffff, + lpfc_cmd->status, lpfc_cmd->result, + vport->fc_myDID, + (pnode) ? pnode->nlp_DID : 0, + phba->sli_rev == LPFC_SLI_REV4 ? + lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, + pIocbOut->iocb.ulpContext, + lpfc_cmd->cur_iocbq.iocb.ulpIoTag); + + switch (lpfc_cmd->status) { + case IOSTAT_FCP_RSP_ERROR: + /* Call FCP RSP handler to determine result */ + lpfc_handle_fcp_err(vport, lpfc_cmd, + pIocbOut->iocb.un.fcpi.fcpi_parm); + break; + case IOSTAT_NPORT_BSY: + case IOSTAT_FABRIC_BSY: + cmd->result = DID_TRANSPORT_DISRUPTED << 16; + fast_path_evt = lpfc_alloc_fast_evt(phba); + if (!fast_path_evt) + break; + fast_path_evt->un.fabric_evt.event_type = + FC_REG_FABRIC_EVENT; + fast_path_evt->un.fabric_evt.subcategory = + (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? + LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; + if (pnode) { + memcpy(&fast_path_evt->un.fabric_evt.wwpn, + &pnode->nlp_portname, + sizeof(struct lpfc_name)); + memcpy(&fast_path_evt->un.fabric_evt.wwnn, + &pnode->nlp_nodename, + sizeof(struct lpfc_name)); + } + fast_path_evt->vport = vport; + fast_path_evt->work_evt.evt = + LPFC_EVT_FASTPATH_MGMT_EVT; + spin_lock_irqsave(&phba->hbalock, flags); + list_add_tail(&fast_path_evt->work_evt.evt_listp, + &phba->work_list); + spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_worker_wake_up(phba); + break; + case IOSTAT_LOCAL_REJECT: + case IOSTAT_REMOTE_STOP: + if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || + lpfc_cmd->result == + IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || + lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || + lpfc_cmd->result == + IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { + cmd->result = DID_NO_CONNECT << 16; + break; + } + if (lpfc_cmd->result == IOERR_INVALID_RPI || + lpfc_cmd->result == IOERR_NO_RESOURCES || + lpfc_cmd->result == IOERR_ABORT_REQUESTED || + lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { + cmd->result = DID_TRANSPORT_DISRUPTED << 16; + break; + } + if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || + lpfc_cmd->result == IOERR_TX_DMA_FAILED) && + pIocbOut->iocb.unsli3.sli3_bg.bgstat) { + if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { + /* + * This is a response for a BG enabled + * cmd. Parse BG error + */ + lpfc_parse_bg_err(phba, lpfc_cmd, + pIocbOut); + break; + } else { + lpfc_printf_vlog(vport, KERN_WARNING, + LOG_BG, + "9031 non-zero BGSTAT " + "on unprotected cmd\n"); + } + } + if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) + && (phba->sli_rev == LPFC_SLI_REV4) + && pnode) { + /* This IO was aborted by the target, we don't + * know the rxid and because we did not send the + * ABTS we cannot generate and RRQ. + */ + lpfc_set_rrq_active(phba, pnode, + lpfc_cmd->cur_iocbq.sli4_lxritag, + 0, 0); + } + fallthrough; + default: + cmd->result = DID_ERROR << 16; + break; + } + + if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) + cmd->result = DID_TRANSPORT_DISRUPTED << 16 | + SAM_STAT_BUSY; + } else + cmd->result = DID_OK << 16; + + if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { + uint32_t *lp = (uint32_t *)cmd->sense_buffer; + + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0710 Iodone <%d/%llu> cmd x%px, error " + "x%x SNS x%x x%x Data: x%x x%x\n", + cmd->device->id, cmd->device->lun, cmd, + cmd->result, *lp, *(lp + 3), cmd->retries, + scsi_get_resid(cmd)); + } + + if (vport->cfg_max_scsicmpl_time && + time_after(jiffies, lpfc_cmd->start_time + + msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { + spin_lock_irqsave(shost->host_lock, flags); + if (pnode) { + if (pnode->cmd_qdepth > + atomic_read(&pnode->cmd_pending) && + (atomic_read(&pnode->cmd_pending) > + LPFC_MIN_TGT_QDEPTH) && + ((cmd->cmnd[0] == READ_10) || + (cmd->cmnd[0] == WRITE_10))) + pnode->cmd_qdepth = + atomic_read(&pnode->cmd_pending); + + pnode->last_change_time = jiffies; + } + spin_unlock_irqrestore(shost->host_lock, flags); + } + lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); + + lpfc_cmd->pCmd = NULL; + spin_unlock(&lpfc_cmd->buf_lock); + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (lpfc_cmd->ts_cmd_start) { + lpfc_cmd->ts_isr_cmpl = pIocbIn->isr_timestamp; + lpfc_cmd->ts_data_io = ktime_get_ns(); + phba->ktime_last_cmd = lpfc_cmd->ts_data_io; + lpfc_io_ktime(phba, lpfc_cmd); + } +#endif + + /* The sdev is not guaranteed to be valid post scsi_done upcall. */ + scsi_done(cmd); + + /* + * If there is an abort thread waiting for command completion + * wake up the thread. + */ + spin_lock(&lpfc_cmd->buf_lock); + lpfc_cmd->cur_iocbq.cmd_flag &= ~LPFC_DRIVER_ABORTED; + if (lpfc_cmd->waitq) + wake_up(lpfc_cmd->waitq); + spin_unlock(&lpfc_cmd->buf_lock); + + lpfc_release_scsi_buf(phba, lpfc_cmd); +} + +/** + * lpfc_scsi_prep_cmnd_buf_s3 - SLI-3 IOCB init for the IO + * @vport: Pointer to vport object. + * @lpfc_cmd: The scsi buffer which is going to be prep'ed. + * @tmo: timeout value for the IO + * + * Based on the data-direction of the command, initialize IOCB + * in the I/O buffer. Fill in the IOCB fields which are independent + * of the scsi buffer + * + * RETURNS 0 - SUCCESS, + **/ +static int lpfc_scsi_prep_cmnd_buf_s3(struct lpfc_vport *vport, + struct lpfc_io_buf *lpfc_cmd, + uint8_t tmo) +{ + IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; + struct lpfc_iocbq *piocbq = &lpfc_cmd->cur_iocbq; + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct lpfc_nodelist *pnode = lpfc_cmd->ndlp; + int datadir = scsi_cmnd->sc_data_direction; + u32 fcpdl; + + piocbq->iocb.un.fcpi.fcpi_XRdy = 0; + + /* + * There are three possibilities here - use scatter-gather segment, use + * the single mapping, or neither. Start the lpfc command prep by + * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first + * data bde entry. + */ + if (scsi_sg_count(scsi_cmnd)) { + if (datadir == DMA_TO_DEVICE) { + iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; + iocb_cmd->ulpPU = PARM_READ_CHECK; + if (vport->cfg_first_burst_size && + (pnode->nlp_flag & NLP_FIRSTBURST)) { + u32 xrdy_len; + + fcpdl = scsi_bufflen(scsi_cmnd); + xrdy_len = min(fcpdl, + vport->cfg_first_burst_size); + piocbq->iocb.un.fcpi.fcpi_XRdy = xrdy_len; + } + fcp_cmnd->fcpCntl3 = WRITE_DATA; + } else { + iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; + iocb_cmd->ulpPU = PARM_READ_CHECK; + fcp_cmnd->fcpCntl3 = READ_DATA; + } + } else { + iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; + iocb_cmd->un.fcpi.fcpi_parm = 0; + iocb_cmd->ulpPU = 0; + fcp_cmnd->fcpCntl3 = 0; + } + + /* + * Finish initializing those IOCB fields that are independent + * of the scsi_cmnd request_buffer + */ + piocbq->iocb.ulpContext = pnode->nlp_rpi; + if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) + piocbq->iocb.ulpFCP2Rcvy = 1; + else + piocbq->iocb.ulpFCP2Rcvy = 0; + + piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); + piocbq->io_buf = lpfc_cmd; + if (!piocbq->cmd_cmpl) + piocbq->cmd_cmpl = lpfc_scsi_cmd_iocb_cmpl; + piocbq->iocb.ulpTimeout = tmo; + piocbq->vport = vport; + return 0; +} + +/** + * lpfc_scsi_prep_cmnd_buf_s4 - SLI-4 WQE init for the IO + * @vport: Pointer to vport object. + * @lpfc_cmd: The scsi buffer which is going to be prep'ed. + * @tmo: timeout value for the IO + * + * Based on the data-direction of the command copy WQE template + * to I/O buffer WQE. Fill in the WQE fields which are independent + * of the scsi buffer + * + * RETURNS 0 - SUCCESS, + **/ +static int lpfc_scsi_prep_cmnd_buf_s4(struct lpfc_vport *vport, + struct lpfc_io_buf *lpfc_cmd, + uint8_t tmo) +{ + struct lpfc_hba *phba = vport->phba; + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct lpfc_sli4_hdw_queue *hdwq = NULL; + struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq; + struct lpfc_nodelist *pnode = lpfc_cmd->ndlp; + union lpfc_wqe128 *wqe = &pwqeq->wqe; + u16 idx = lpfc_cmd->hdwq_no; + int datadir = scsi_cmnd->sc_data_direction; + + hdwq = &phba->sli4_hba.hdwq[idx]; + + /* Initialize 64 bytes only */ + memset(wqe, 0, sizeof(union lpfc_wqe128)); + + /* + * There are three possibilities here - use scatter-gather segment, use + * the single mapping, or neither. + */ + if (scsi_sg_count(scsi_cmnd)) { + if (datadir == DMA_TO_DEVICE) { + /* From the iwrite template, initialize words 7 - 11 */ + memcpy(&wqe->words[7], + &lpfc_iwrite_cmd_template.words[7], + sizeof(uint32_t) * 5); + + fcp_cmnd->fcpCntl3 = WRITE_DATA; + if (hdwq) + hdwq->scsi_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 7 */ + bf_set(wqe_tmo, &wqe->fcp_iread.wqe_com, tmo); + + fcp_cmnd->fcpCntl3 = READ_DATA; + if (hdwq) + hdwq->scsi_cstat.input_requests++; + + /* 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); + } + } else { + /* From the icmnd template, initialize words 4 - 11 */ + memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4], + sizeof(uint32_t) * 8); + + /* Word 7 */ + bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, tmo); + + fcp_cmnd->fcpCntl3 = 0; + if (hdwq) + hdwq->scsi_cstat.control_requests++; + } + + /* + * Finish initializing those WQE fields that are independent + * of the request_buffer + */ + + /* Word 3 */ + bf_set(payload_offset_len, &wqe->fcp_icmd, + sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); + + /* 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 7*/ + if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) + bf_set(wqe_erp, &wqe->generic.wqe_com, 1); + + bf_set(wqe_class, &wqe->generic.wqe_com, + (pnode->nlp_fcp_info & 0x0f)); + + /* Word 8 */ + wqe->generic.wqe_com.abort_tag = pwqeq->iotag; + + /* Word 9 */ + bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag); + + pwqeq->vport = vport; + pwqeq->io_buf = lpfc_cmd; + pwqeq->hba_wqidx = lpfc_cmd->hdwq_no; + pwqeq->cmd_cmpl = lpfc_fcp_io_cmd_wqe_cmpl; + + return 0; +} + +/** + * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: The scsi command which needs to send. + * @pnode: Pointer to lpfc_nodelist. + * + * This routine initializes fcp_cmnd and iocb data structure from scsi command + * to transfer for device with SLI3 interface spec. + **/ +static int +lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd, + struct lpfc_nodelist *pnode) +{ + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + u8 *ptr; + + if (!pnode) + return 0; + + lpfc_cmd->fcp_rsp->rspSnsLen = 0; + /* clear task management bits */ + lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; + + int_to_scsilun(lpfc_cmd->pCmd->device->lun, + &lpfc_cmd->fcp_cmnd->fcp_lun); + + ptr = &fcp_cmnd->fcpCdb[0]; + memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); + if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { + ptr += scsi_cmnd->cmd_len; + memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); + } + + fcp_cmnd->fcpCntl1 = SIMPLE_Q; + + lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, lpfc_cmd->timeout); + + return 0; +} + +/** + * lpfc_scsi_prep_task_mgmt_cmd_s3 - Convert SLI3 scsi TM cmd to FCP info unit + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: Pointer to lpfc_io_buf data structure. + * @lun: Logical unit number. + * @task_mgmt_cmd: SCSI task management command. + * + * This routine creates FCP information unit corresponding to @task_mgmt_cmd + * for device with SLI-3 interface spec. + * + * Return codes: + * 0 - Error + * 1 - Success + **/ +static int +lpfc_scsi_prep_task_mgmt_cmd_s3(struct lpfc_vport *vport, + struct lpfc_io_buf *lpfc_cmd, + u64 lun, u8 task_mgmt_cmd) +{ + struct lpfc_iocbq *piocbq; + IOCB_t *piocb; + struct fcp_cmnd *fcp_cmnd; + struct lpfc_rport_data *rdata = lpfc_cmd->rdata; + struct lpfc_nodelist *ndlp = rdata->pnode; + + if (!ndlp || ndlp->nlp_state != NLP_STE_MAPPED_NODE) + return 0; + + piocbq = &(lpfc_cmd->cur_iocbq); + piocbq->vport = vport; + + piocb = &piocbq->iocb; + + fcp_cmnd = lpfc_cmd->fcp_cmnd; + /* Clear out any old data in the FCP command area */ + memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); + int_to_scsilun(lun, &fcp_cmnd->fcp_lun); + fcp_cmnd->fcpCntl2 = task_mgmt_cmd; + if (!(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) + lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); + piocb->ulpCommand = CMD_FCP_ICMND64_CR; + piocb->ulpContext = ndlp->nlp_rpi; + piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0; + piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); + piocb->ulpPU = 0; + piocb->un.fcpi.fcpi_parm = 0; + + /* ulpTimeout is only one byte */ + if (lpfc_cmd->timeout > 0xff) { + /* + * Do not timeout the command at the firmware level. + * The driver will provide the timeout mechanism. + */ + piocb->ulpTimeout = 0; + } else + piocb->ulpTimeout = lpfc_cmd->timeout; + + return 1; +} + +/** + * lpfc_scsi_prep_task_mgmt_cmd_s4 - Convert SLI4 scsi TM cmd to FCP info unit + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: Pointer to lpfc_io_buf data structure. + * @lun: Logical unit number. + * @task_mgmt_cmd: SCSI task management command. + * + * This routine creates FCP information unit corresponding to @task_mgmt_cmd + * for device with SLI-4 interface spec. + * + * Return codes: + * 0 - Error + * 1 - Success + **/ +static int +lpfc_scsi_prep_task_mgmt_cmd_s4(struct lpfc_vport *vport, + struct lpfc_io_buf *lpfc_cmd, + u64 lun, u8 task_mgmt_cmd) +{ + struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq; + union lpfc_wqe128 *wqe = &pwqeq->wqe; + struct fcp_cmnd *fcp_cmnd; + struct lpfc_rport_data *rdata = lpfc_cmd->rdata; + struct lpfc_nodelist *ndlp = rdata->pnode; + + if (!ndlp || ndlp->nlp_state != NLP_STE_MAPPED_NODE) + return 0; + + pwqeq->vport = vport; + /* Initialize 64 bytes only */ + memset(wqe, 0, sizeof(union lpfc_wqe128)); + + /* From the icmnd template, initialize words 4 - 11 */ + memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4], + sizeof(uint32_t) * 8); + + fcp_cmnd = lpfc_cmd->fcp_cmnd; + /* Clear out any old data in the FCP command area */ + memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); + int_to_scsilun(lun, &fcp_cmnd->fcp_lun); + fcp_cmnd->fcpCntl3 = 0; + fcp_cmnd->fcpCntl2 = task_mgmt_cmd; + + bf_set(payload_offset_len, &wqe->fcp_icmd, + sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); + bf_set(cmd_buff_len, &wqe->fcp_icmd, 0); + bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, /* ulpContext */ + vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]); + bf_set(wqe_erp, &wqe->fcp_icmd.wqe_com, + ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0)); + bf_set(wqe_class, &wqe->fcp_icmd.wqe_com, + (ndlp->nlp_fcp_info & 0x0f)); + + /* ulpTimeout is only one byte */ + if (lpfc_cmd->timeout > 0xff) { + /* + * Do not timeout the command at the firmware level. + * The driver will provide the timeout mechanism. + */ + bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, 0); + } else { + bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, lpfc_cmd->timeout); + } + + lpfc_prep_embed_io(vport->phba, lpfc_cmd); + bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag); + wqe->generic.wqe_com.abort_tag = pwqeq->iotag; + bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag); + + lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); + + return 1; +} + +/** + * lpfc_scsi_api_table_setup - Set up scsi api function jump table + * @phba: The hba struct for which this call is being executed. + * @dev_grp: The HBA PCI-Device group number. + * + * This routine sets up the SCSI interface API function jump table in @phba + * struct. + * Returns: 0 - success, -ENODEV - failure. + **/ +int +lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) +{ + + phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; + + switch (dev_grp) { + case LPFC_PCI_DEV_LP: + phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; + phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; + phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; + phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; + phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s3; + phba->lpfc_scsi_prep_task_mgmt_cmd = + lpfc_scsi_prep_task_mgmt_cmd_s3; + break; + case LPFC_PCI_DEV_OC: + phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; + phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; + phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; + phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; + phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s4; + phba->lpfc_scsi_prep_task_mgmt_cmd = + lpfc_scsi_prep_task_mgmt_cmd_s4; + break; + default: + lpfc_printf_log(phba, KERN_ERR, LOG_INIT, + "1418 Invalid HBA PCI-device group: 0x%x\n", + dev_grp); + return -ENODEV; + } + phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; + return 0; +} + +/** + * lpfc_tskmgmt_def_cmpl - IOCB completion routine for task management command + * @phba: The Hba for which this call is being executed. + * @cmdiocbq: Pointer to lpfc_iocbq data structure. + * @rspiocbq: Pointer to lpfc_iocbq data structure. + * + * This routine is IOCB completion routine for device reset and target reset + * routine. This routine release scsi buffer associated with lpfc_cmd. + **/ +static void +lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, + struct lpfc_iocbq *cmdiocbq, + struct lpfc_iocbq *rspiocbq) +{ + struct lpfc_io_buf *lpfc_cmd = cmdiocbq->io_buf; + if (lpfc_cmd) + lpfc_release_scsi_buf(phba, lpfc_cmd); + return; +} + +/** + * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check + * if issuing a pci_bus_reset is possibly unsafe + * @phba: lpfc_hba pointer. + * + * Description: + * Walks the bus_list to ensure only PCI devices with Emulex + * vendor id, device ids that support hot reset, and only one occurrence + * of function 0. + * + * Returns: + * -EBADSLT, detected invalid device + * 0, successful + */ +int +lpfc_check_pci_resettable(struct lpfc_hba *phba) +{ + const struct pci_dev *pdev = phba->pcidev; + struct pci_dev *ptr = NULL; + u8 counter = 0; + + /* Walk the list of devices on the pci_dev's bus */ + list_for_each_entry(ptr, &pdev->bus->devices, bus_list) { + /* Check for Emulex Vendor ID */ + if (ptr->vendor != PCI_VENDOR_ID_EMULEX) { + lpfc_printf_log(phba, KERN_INFO, LOG_INIT, + "8346 Non-Emulex vendor found: " + "0x%04x\n", ptr->vendor); + return -EBADSLT; + } + + /* Check for valid Emulex Device ID */ + if (phba->sli_rev != LPFC_SLI_REV4 || + phba->hba_flag & HBA_FCOE_MODE) { + lpfc_printf_log(phba, KERN_INFO, LOG_INIT, + "8347 Incapable PCI reset device: " + "0x%04x\n", ptr->device); + return -EBADSLT; + } + + /* Check for only one function 0 ID to ensure only one HBA on + * secondary bus + */ + if (ptr->devfn == 0) { + if (++counter > 1) { + lpfc_printf_log(phba, KERN_INFO, LOG_INIT, + "8348 More than one device on " + "secondary bus found\n"); + return -EBADSLT; + } + } + } + + return 0; +} + +/** + * lpfc_info - Info entry point of scsi_host_template data structure + * @host: The scsi host for which this call is being executed. + * + * This routine provides module information about hba. + * + * Reutrn code: + * Pointer to char - Success. + **/ +const char * +lpfc_info(struct Scsi_Host *host) +{ + struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; + struct lpfc_hba *phba = vport->phba; + int link_speed = 0; + static char lpfcinfobuf[384]; + char tmp[384] = {0}; + + memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf)); + if (phba && phba->pcidev){ + /* Model Description */ + scnprintf(tmp, sizeof(tmp), phba->ModelDesc); + if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >= + sizeof(lpfcinfobuf)) + goto buffer_done; + + /* PCI Info */ + scnprintf(tmp, sizeof(tmp), + " on PCI bus %02x device %02x irq %d", + phba->pcidev->bus->number, phba->pcidev->devfn, + phba->pcidev->irq); + if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >= + sizeof(lpfcinfobuf)) + goto buffer_done; + + /* Port Number */ + if (phba->Port[0]) { + scnprintf(tmp, sizeof(tmp), " port %s", phba->Port); + if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >= + sizeof(lpfcinfobuf)) + goto buffer_done; + } + + /* Link Speed */ + link_speed = lpfc_sli_port_speed_get(phba); + if (link_speed != 0) { + scnprintf(tmp, sizeof(tmp), + " Logical Link Speed: %d Mbps", link_speed); + if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >= + sizeof(lpfcinfobuf)) + goto buffer_done; + } + + /* PCI resettable */ + if (!lpfc_check_pci_resettable(phba)) { + scnprintf(tmp, sizeof(tmp), " PCI resettable"); + strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)); + } + } + +buffer_done: + return lpfcinfobuf; +} + +/** + * lpfc_poll_rearm_timer - Routine to modify fcp_poll timer of hba + * @phba: The Hba for which this call is being executed. + * + * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. + * The default value of cfg_poll_tmo is 10 milliseconds. + **/ +static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) +{ + unsigned long poll_tmo_expires = + (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); + + if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq)) + mod_timer(&phba->fcp_poll_timer, + poll_tmo_expires); +} + +/** + * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA + * @phba: The Hba for which this call is being executed. + * + * This routine starts the fcp_poll_timer of @phba. + **/ +void lpfc_poll_start_timer(struct lpfc_hba * phba) +{ + lpfc_poll_rearm_timer(phba); +} + +/** + * lpfc_poll_timeout - Restart polling timer + * @t: Timer construct where lpfc_hba data structure pointer is obtained. + * + * This routine restarts fcp_poll timer, when FCP ring polling is enable + * and FCP Ring interrupt is disable. + **/ +void lpfc_poll_timeout(struct timer_list *t) +{ + struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer); + + if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { + lpfc_sli_handle_fast_ring_event(phba, + &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); + + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_poll_rearm_timer(phba); + } +} + +/* + * lpfc_is_command_vm_io - get the UUID from blk cgroup + * @cmd: Pointer to scsi_cmnd data structure + * Returns UUID if present, otherwise NULL + */ +static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd) +{ + struct bio *bio = scsi_cmd_to_rq(cmd)->bio; + + if (!IS_ENABLED(CONFIG_BLK_CGROUP_FC_APPID) || !bio) + return NULL; + return blkcg_get_fc_appid(bio); +} + +/** + * lpfc_queuecommand - scsi_host_template queuecommand entry point + * @shost: kernel scsi host pointer. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * Driver registers this routine to scsi midlayer to submit a @cmd to process. + * This routine prepares an IOCB from scsi command and provides to firmware. + * The @done callback is invoked after driver finished processing the command. + * + * Return value : + * 0 - Success + * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. + **/ +static int +lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) +{ + struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; + struct lpfc_hba *phba = vport->phba; + struct lpfc_iocbq *cur_iocbq = NULL; + struct lpfc_rport_data *rdata; + struct lpfc_nodelist *ndlp; + struct lpfc_io_buf *lpfc_cmd; + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + int err, idx; + u8 *uuid = NULL; + uint64_t start; + + start = ktime_get_ns(); + rdata = lpfc_rport_data_from_scsi_device(cmnd->device); + + /* sanity check on references */ + if (unlikely(!rdata) || unlikely(!rport)) + goto out_fail_command; + + err = fc_remote_port_chkready(rport); + if (err) { + cmnd->result = err; + goto out_fail_command; + } + ndlp = rdata->pnode; + + if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && + (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { + + lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, + "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" + " op:%02x str=%s without registering for" + " BlockGuard - Rejecting command\n", + cmnd->cmnd[0], scsi_get_prot_op(cmnd), + dif_op_str[scsi_get_prot_op(cmnd)]); + goto out_fail_command; + } + + /* + * Catch race where our node has transitioned, but the + * transport is still transitioning. + */ + if (!ndlp) + goto out_tgt_busy1; + + /* Check if IO qualifies for CMF */ + if (phba->cmf_active_mode != LPFC_CFG_OFF && + cmnd->sc_data_direction == DMA_FROM_DEVICE && + (scsi_sg_count(cmnd))) { + /* Latency start time saved in rx_cmd_start later in routine */ + err = lpfc_update_cmf_cmd(phba, scsi_bufflen(cmnd)); + if (err) + goto out_tgt_busy1; + } + + if (lpfc_ndlp_check_qdepth(phba, ndlp)) { + if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) { + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR, + "3377 Target Queue Full, scsi Id:%d " + "Qdepth:%d Pending command:%d" + " WWNN:%02x:%02x:%02x:%02x:" + "%02x:%02x:%02x:%02x, " + " WWPN:%02x:%02x:%02x:%02x:" + "%02x:%02x:%02x:%02x", + ndlp->nlp_sid, ndlp->cmd_qdepth, + atomic_read(&ndlp->cmd_pending), + ndlp->nlp_nodename.u.wwn[0], + ndlp->nlp_nodename.u.wwn[1], + ndlp->nlp_nodename.u.wwn[2], + ndlp->nlp_nodename.u.wwn[3], + ndlp->nlp_nodename.u.wwn[4], + ndlp->nlp_nodename.u.wwn[5], + ndlp->nlp_nodename.u.wwn[6], + ndlp->nlp_nodename.u.wwn[7], + ndlp->nlp_portname.u.wwn[0], + ndlp->nlp_portname.u.wwn[1], + ndlp->nlp_portname.u.wwn[2], + ndlp->nlp_portname.u.wwn[3], + ndlp->nlp_portname.u.wwn[4], + ndlp->nlp_portname.u.wwn[5], + ndlp->nlp_portname.u.wwn[6], + ndlp->nlp_portname.u.wwn[7]); + goto out_tgt_busy2; + } + } + + lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp, cmnd); + if (lpfc_cmd == NULL) { + lpfc_rampdown_queue_depth(phba); + + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR, + "0707 driver's buffer pool is empty, " + "IO busied\n"); + goto out_host_busy; + } + lpfc_cmd->rx_cmd_start = start; + + cur_iocbq = &lpfc_cmd->cur_iocbq; + /* + * Store the midlayer's command structure for the completion phase + * and complete the command initialization. + */ + lpfc_cmd->pCmd = cmnd; + lpfc_cmd->rdata = rdata; + lpfc_cmd->ndlp = ndlp; + cur_iocbq->cmd_cmpl = NULL; + cmnd->host_scribble = (unsigned char *)lpfc_cmd; + + err = lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); + if (err) + goto out_host_busy_release_buf; + + if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { + if (vport->phba->cfg_enable_bg) { + lpfc_printf_vlog(vport, + KERN_INFO, LOG_SCSI_CMD, + "9033 BLKGRD: rcvd %s cmd:x%x " + "reftag x%x cnt %u pt %x\n", + dif_op_str[scsi_get_prot_op(cmnd)], + cmnd->cmnd[0], + scsi_prot_ref_tag(cmnd), + scsi_logical_block_count(cmnd), + (cmnd->cmnd[1]>>5)); + } + err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); + } else { + if (vport->phba->cfg_enable_bg) { + lpfc_printf_vlog(vport, + KERN_INFO, LOG_SCSI_CMD, + "9038 BLKGRD: rcvd PROT_NORMAL cmd: " + "x%x reftag x%x cnt %u pt %x\n", + cmnd->cmnd[0], + scsi_prot_ref_tag(cmnd), + scsi_logical_block_count(cmnd), + (cmnd->cmnd[1]>>5)); + } + err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); + } + + if (unlikely(err)) { + if (err == 2) { + cmnd->result = DID_ERROR << 16; + goto out_fail_command_release_buf; + } + goto out_host_busy_free_buf; + } + + /* 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 = lpfc_is_command_vm_io(cmnd); + + if (uuid) { + err = lpfc_vmid_get_appid(vport, uuid, + cmnd->sc_data_direction, + (union lpfc_vmid_io_tag *) + &cur_iocbq->vmid_tag); + if (!err) + cur_iocbq->cmd_flag |= LPFC_IO_VMID; + } + } + +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO)) + this_cpu_inc(phba->sli4_hba.c_stat->xmt_io); +#endif + /* Issue I/O to adapter */ + err = lpfc_sli_issue_fcp_io(phba, LPFC_FCP_RING, cur_iocbq, + SLI_IOCB_RET_IOCB); +#ifdef CONFIG_SCSI_LPFC_DEBUG_FS + if (start) { + lpfc_cmd->ts_cmd_start = start; + lpfc_cmd->ts_last_cmd = phba->ktime_last_cmd; + lpfc_cmd->ts_cmd_wqput = ktime_get_ns(); + } else { + lpfc_cmd->ts_cmd_start = 0; + } +#endif + if (err) { + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "3376 FCP could not issue iocb err %x " + "FCP cmd x%x <%d/%llu> " + "sid: x%x did: x%x oxid: x%x " + "Data: x%x x%x x%x x%x\n", + err, cmnd->cmnd[0], + cmnd->device ? cmnd->device->id : 0xffff, + cmnd->device ? cmnd->device->lun : (u64)-1, + vport->fc_myDID, ndlp->nlp_DID, + phba->sli_rev == LPFC_SLI_REV4 ? + cur_iocbq->sli4_xritag : 0xffff, + phba->sli_rev == LPFC_SLI_REV4 ? + phba->sli4_hba.rpi_ids[ndlp->nlp_rpi] : + cur_iocbq->iocb.ulpContext, + cur_iocbq->iotag, + phba->sli_rev == LPFC_SLI_REV4 ? + bf_get(wqe_tmo, + &cur_iocbq->wqe.generic.wqe_com) : + cur_iocbq->iocb.ulpTimeout, + (uint32_t)(scsi_cmd_to_rq(cmnd)->timeout / 1000)); + + goto out_host_busy_free_buf; + } + + if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { + lpfc_sli_handle_fast_ring_event(phba, + &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); + + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_poll_rearm_timer(phba); + } + + if (phba->cfg_xri_rebalancing) + lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_cmd->hdwq_no); + + return 0; + + out_host_busy_free_buf: + idx = lpfc_cmd->hdwq_no; + lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); + if (phba->sli4_hba.hdwq) { + switch (lpfc_cmd->fcp_cmnd->fcpCntl3) { + case WRITE_DATA: + phba->sli4_hba.hdwq[idx].scsi_cstat.output_requests--; + break; + case READ_DATA: + phba->sli4_hba.hdwq[idx].scsi_cstat.input_requests--; + break; + default: + phba->sli4_hba.hdwq[idx].scsi_cstat.control_requests--; + } + } + out_host_busy_release_buf: + lpfc_release_scsi_buf(phba, lpfc_cmd); + out_host_busy: + lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd), + shost); + return SCSI_MLQUEUE_HOST_BUSY; + + out_tgt_busy2: + lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd), + shost); + out_tgt_busy1: + return SCSI_MLQUEUE_TARGET_BUSY; + + out_fail_command_release_buf: + lpfc_release_scsi_buf(phba, lpfc_cmd); + lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd), + shost); + + out_fail_command: + scsi_done(cmnd); + return 0; +} + +/* + * lpfc_vmid_vport_cleanup - cleans up the resources associated with a vport + * @vport: The virtual port for which this call is being executed. + */ +void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport) +{ + u32 bucket; + struct lpfc_vmid *cur; + + if (vport->port_type == LPFC_PHYSICAL_PORT) + del_timer_sync(&vport->phba->inactive_vmid_poll); + + kfree(vport->qfpa_res); + kfree(vport->vmid_priority.vmid_range); + kfree(vport->vmid); + + if (!hash_empty(vport->hash_table)) + hash_for_each(vport->hash_table, bucket, cur, hnode) + hash_del(&cur->hnode); + + vport->qfpa_res = NULL; + vport->vmid_priority.vmid_range = NULL; + vport->vmid = NULL; + vport->cur_vmid_cnt = 0; +} + +/** + * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine aborts @cmnd pending in base driver. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_abort_handler(struct scsi_cmnd *cmnd) +{ + struct Scsi_Host *shost = cmnd->device->host; + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; + struct lpfc_hba *phba = vport->phba; + struct lpfc_iocbq *iocb; + struct lpfc_io_buf *lpfc_cmd; + int ret = SUCCESS, status = 0; + struct lpfc_sli_ring *pring_s4 = NULL; + struct lpfc_sli_ring *pring = NULL; + int ret_val; + unsigned long flags; + DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); + + status = fc_block_rport(rport); + if (status != 0 && status != SUCCESS) + return status; + + lpfc_cmd = (struct lpfc_io_buf *)cmnd->host_scribble; + if (!lpfc_cmd) + return ret; + + /* Guard against IO completion being called at same time */ + spin_lock_irqsave(&lpfc_cmd->buf_lock, flags); + + spin_lock(&phba->hbalock); + /* driver queued commands are in process of being flushed */ + if (phba->hba_flag & HBA_IOQ_FLUSH) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "3168 SCSI Layer abort requested I/O has been " + "flushed by LLD.\n"); + ret = FAILED; + goto out_unlock_hba; + } + + if (!lpfc_cmd->pCmd) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "2873 SCSI Layer I/O Abort Request IO CMPL Status " + "x%x ID %d LUN %llu\n", + SUCCESS, cmnd->device->id, cmnd->device->lun); + goto out_unlock_hba; + } + + iocb = &lpfc_cmd->cur_iocbq; + if (phba->sli_rev == LPFC_SLI_REV4) { + pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring; + if (!pring_s4) { + ret = FAILED; + goto out_unlock_hba; + } + spin_lock(&pring_s4->ring_lock); + } + /* the command is in process of being cancelled */ + if (!(iocb->cmd_flag & LPFC_IO_ON_TXCMPLQ)) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "3169 SCSI Layer abort requested I/O has been " + "cancelled by LLD.\n"); + ret = FAILED; + goto out_unlock_ring; + } + /* + * If pCmd field of the corresponding lpfc_io_buf structure + * points to a different SCSI command, then the driver has + * already completed this command, but the midlayer did not + * see the completion before the eh fired. Just return SUCCESS. + */ + if (lpfc_cmd->pCmd != cmnd) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "3170 SCSI Layer abort requested I/O has been " + "completed by LLD.\n"); + goto out_unlock_ring; + } + + WARN_ON(iocb->io_buf != lpfc_cmd); + + /* abort issued in recovery is still in progress */ + if (iocb->cmd_flag & LPFC_DRIVER_ABORTED) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "3389 SCSI Layer I/O Abort Request is pending\n"); + if (phba->sli_rev == LPFC_SLI_REV4) + spin_unlock(&pring_s4->ring_lock); + spin_unlock(&phba->hbalock); + spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags); + goto wait_for_cmpl; + } + + lpfc_cmd->waitq = &waitq; + if (phba->sli_rev == LPFC_SLI_REV4) { + spin_unlock(&pring_s4->ring_lock); + ret_val = lpfc_sli4_issue_abort_iotag(phba, iocb, + lpfc_sli_abort_fcp_cmpl); + } else { + pring = &phba->sli.sli3_ring[LPFC_FCP_RING]; + ret_val = lpfc_sli_issue_abort_iotag(phba, pring, iocb, + lpfc_sli_abort_fcp_cmpl); + } + + /* Make sure HBA is alive */ + lpfc_issue_hb_tmo(phba); + + if (ret_val != IOCB_SUCCESS) { + /* Indicate the IO is not being aborted by the driver. */ + lpfc_cmd->waitq = NULL; + ret = FAILED; + goto out_unlock_hba; + } + + /* no longer need the lock after this point */ + spin_unlock(&phba->hbalock); + spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags); + + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_sli_handle_fast_ring_event(phba, + &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); + +wait_for_cmpl: + /* + * cmd_flag is set to LPFC_DRIVER_ABORTED before we wait + * for abort to complete. + */ + wait_event_timeout(waitq, + (lpfc_cmd->pCmd != cmnd), + msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000)); + + spin_lock(&lpfc_cmd->buf_lock); + + if (lpfc_cmd->pCmd == cmnd) { + ret = FAILED; + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0748 abort handler timed out waiting " + "for aborting I/O (xri:x%x) to complete: " + "ret %#x, ID %d, LUN %llu\n", + iocb->sli4_xritag, ret, + cmnd->device->id, cmnd->device->lun); + } + + lpfc_cmd->waitq = NULL; + + spin_unlock(&lpfc_cmd->buf_lock); + goto out; + +out_unlock_ring: + if (phba->sli_rev == LPFC_SLI_REV4) + spin_unlock(&pring_s4->ring_lock); +out_unlock_hba: + spin_unlock(&phba->hbalock); + spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags); +out: + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "0749 SCSI Layer I/O Abort Request Status x%x ID %d " + "LUN %llu\n", ret, cmnd->device->id, + cmnd->device->lun); + return ret; +} + +static char * +lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) +{ + switch (task_mgmt_cmd) { + case FCP_ABORT_TASK_SET: + return "ABORT_TASK_SET"; + case FCP_CLEAR_TASK_SET: + return "FCP_CLEAR_TASK_SET"; + case FCP_BUS_RESET: + return "FCP_BUS_RESET"; + case FCP_LUN_RESET: + return "FCP_LUN_RESET"; + case FCP_TARGET_RESET: + return "FCP_TARGET_RESET"; + case FCP_CLEAR_ACA: + return "FCP_CLEAR_ACA"; + case FCP_TERMINATE_TASK: + return "FCP_TERMINATE_TASK"; + default: + return "unknown"; + } +} + + +/** + * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: Pointer to lpfc_io_buf data structure. + * + * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd) +{ + struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; + uint32_t rsp_info; + uint32_t rsp_len; + uint8_t rsp_info_code; + int ret = FAILED; + + + if (fcprsp == NULL) + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0703 fcp_rsp is missing\n"); + else { + rsp_info = fcprsp->rspStatus2; + rsp_len = be32_to_cpu(fcprsp->rspRspLen); + rsp_info_code = fcprsp->rspInfo3; + + + lpfc_printf_vlog(vport, KERN_INFO, + LOG_FCP, + "0706 fcp_rsp valid 0x%x," + " rsp len=%d code 0x%x\n", + rsp_info, + rsp_len, rsp_info_code); + + /* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN + * field specifies the number of valid bytes of FCP_RSP_INFO. + * The FCP_RSP_LEN field shall be set to 0x04 or 0x08 + */ + if ((fcprsp->rspStatus2 & RSP_LEN_VALID) && + ((rsp_len == 8) || (rsp_len == 4))) { + switch (rsp_info_code) { + case RSP_NO_FAILURE: + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0715 Task Mgmt No Failure\n"); + ret = SUCCESS; + break; + case RSP_TM_NOT_SUPPORTED: /* TM rejected */ + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0716 Task Mgmt Target " + "reject\n"); + break; + case RSP_TM_NOT_COMPLETED: /* TM failed */ + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0717 Task Mgmt Target " + "failed TM\n"); + break; + case RSP_TM_INVALID_LU: /* TM to invalid LU! */ + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0718 Task Mgmt to invalid " + "LUN\n"); + break; + } + } + } + return ret; +} + + +/** + * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler + * @vport: The virtual port for which this call is being executed. + * @rport: Pointer to remote port + * @tgt_id: Target ID of remote device. + * @lun_id: Lun number for the TMF + * @task_mgmt_cmd: type of TMF to send + * + * This routine builds and sends a TMF (SCSI Task Mgmt Function) to + * a remote port. + * + * Return Code: + * 0x2003 - Error + * 0x2002 - Success. + **/ +static int +lpfc_send_taskmgmt(struct lpfc_vport *vport, struct fc_rport *rport, + unsigned int tgt_id, uint64_t lun_id, + uint8_t task_mgmt_cmd) +{ + struct lpfc_hba *phba = vport->phba; + struct lpfc_io_buf *lpfc_cmd; + struct lpfc_iocbq *iocbq; + struct lpfc_iocbq *iocbqrsp; + struct lpfc_rport_data *rdata; + struct lpfc_nodelist *pnode; + int ret; + int status; + + rdata = rport->dd_data; + if (!rdata || !rdata->pnode) + return FAILED; + pnode = rdata->pnode; + + lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode, NULL); + if (lpfc_cmd == NULL) + return FAILED; + lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo; + lpfc_cmd->rdata = rdata; + lpfc_cmd->pCmd = NULL; + lpfc_cmd->ndlp = pnode; + + status = phba->lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, + task_mgmt_cmd); + if (!status) { + lpfc_release_scsi_buf(phba, lpfc_cmd); + return FAILED; + } + + iocbq = &lpfc_cmd->cur_iocbq; + iocbqrsp = lpfc_sli_get_iocbq(phba); + if (iocbqrsp == NULL) { + lpfc_release_scsi_buf(phba, lpfc_cmd); + return FAILED; + } + iocbq->cmd_cmpl = lpfc_tskmgmt_def_cmpl; + iocbq->vport = vport; + + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0702 Issue %s to TGT %d LUN %llu " + "rpi x%x nlp_flag x%x Data: x%x x%x\n", + lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, + pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, + iocbq->cmd_flag); + + status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, + iocbq, iocbqrsp, lpfc_cmd->timeout); + if ((status != IOCB_SUCCESS) || + (get_job_ulpstatus(phba, iocbqrsp) != IOSTAT_SUCCESS)) { + if (status != IOCB_SUCCESS || + get_job_ulpstatus(phba, iocbqrsp) != IOSTAT_FCP_RSP_ERROR) + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0727 TMF %s to TGT %d LUN %llu " + "failed (%d, %d) cmd_flag x%x\n", + lpfc_taskmgmt_name(task_mgmt_cmd), + tgt_id, lun_id, + get_job_ulpstatus(phba, iocbqrsp), + get_job_word4(phba, iocbqrsp), + iocbq->cmd_flag); + /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */ + if (status == IOCB_SUCCESS) { + if (get_job_ulpstatus(phba, iocbqrsp) == + IOSTAT_FCP_RSP_ERROR) + /* Something in the FCP_RSP was invalid. + * Check conditions */ + ret = lpfc_check_fcp_rsp(vport, lpfc_cmd); + else + ret = FAILED; + } else if ((status == IOCB_TIMEDOUT) || + (status == IOCB_ABORTED)) { + ret = TIMEOUT_ERROR; + } else { + ret = FAILED; + } + } else + ret = SUCCESS; + + lpfc_sli_release_iocbq(phba, iocbqrsp); + + if (status != IOCB_TIMEDOUT) + lpfc_release_scsi_buf(phba, lpfc_cmd); + + return ret; +} + +/** + * lpfc_chk_tgt_mapped - + * @vport: The virtual port to check on + * @rport: Pointer to fc_rport data structure. + * + * This routine delays until the scsi target (aka rport) for the + * command exists (is present and logged in) or we declare it non-existent. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct fc_rport *rport) +{ + struct lpfc_rport_data *rdata; + struct lpfc_nodelist *pnode = NULL; + unsigned long later; + + rdata = rport->dd_data; + if (!rdata) { + lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, + "0797 Tgt Map rport failure: rdata x%px\n", rdata); + return FAILED; + } + pnode = rdata->pnode; + + /* + * If target is not in a MAPPED state, delay until + * target is rediscovered or devloss timeout expires. + */ + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies)) { + if (!pnode) + return FAILED; + if (pnode->nlp_state == NLP_STE_MAPPED_NODE) + return SUCCESS; + schedule_timeout_uninterruptible(msecs_to_jiffies(500)); + rdata = rport->dd_data; + if (!rdata) + return FAILED; + pnode = rdata->pnode; + } + if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) + return FAILED; + return SUCCESS; +} + +/** + * lpfc_reset_flush_io_context - + * @vport: The virtual port (scsi_host) for the flush context + * @tgt_id: If aborting by Target contect - specifies the target id + * @lun_id: If aborting by Lun context - specifies the lun id + * @context: specifies the context level to flush at. + * + * After a reset condition via TMF, we need to flush orphaned i/o + * contexts from the adapter. This routine aborts any contexts + * outstanding, then waits for their completions. The wait is + * bounded by devloss_tmo though. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, + uint64_t lun_id, lpfc_ctx_cmd context) +{ + struct lpfc_hba *phba = vport->phba; + unsigned long later; + int cnt; + + cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); + if (cnt) + lpfc_sli_abort_taskmgmt(vport, + &phba->sli.sli3_ring[LPFC_FCP_RING], + tgt_id, lun_id, context); + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies) && cnt) { + schedule_timeout_uninterruptible(msecs_to_jiffies(20)); + cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); + } + if (cnt) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0724 I/O flush failure for context %s : cnt x%x\n", + ((context == LPFC_CTX_LUN) ? "LUN" : + ((context == LPFC_CTX_TGT) ? "TGT" : + ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), + cnt); + return FAILED; + } + return SUCCESS; +} + +/** + * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine does a device reset by sending a LUN_RESET task management + * command. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_device_reset_handler(struct scsi_cmnd *cmnd) +{ + struct Scsi_Host *shost = cmnd->device->host; + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; + struct lpfc_rport_data *rdata; + struct lpfc_nodelist *pnode; + unsigned tgt_id = cmnd->device->id; + uint64_t lun_id = cmnd->device->lun; + struct lpfc_scsi_event_header scsi_event; + int status; + u32 logit = LOG_FCP; + + if (!rport) + return FAILED; + + rdata = rport->dd_data; + if (!rdata || !rdata->pnode) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0798 Device Reset rdata failure: rdata x%px\n", + rdata); + return FAILED; + } + pnode = rdata->pnode; + status = fc_block_rport(rport); + if (status != 0 && status != SUCCESS) + return status; + + status = lpfc_chk_tgt_mapped(vport, rport); + if (status == FAILED) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0721 Device Reset rport failure: rdata x%px\n", rdata); + return FAILED; + } + + scsi_event.event_type = FC_REG_SCSI_EVENT; + scsi_event.subcategory = LPFC_EVENT_LUNRESET; + scsi_event.lun = lun_id; + memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); + memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); + + fc_host_post_vendor_event(shost, fc_get_event_number(), + sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); + + status = lpfc_send_taskmgmt(vport, rport, tgt_id, lun_id, + FCP_LUN_RESET); + if (status != SUCCESS) + logit = LOG_TRACE_EVENT; + + lpfc_printf_vlog(vport, KERN_ERR, logit, + "0713 SCSI layer issued Device Reset (%d, %llu) " + "return x%x\n", tgt_id, lun_id, status); + + /* + * We have to clean up i/o as : they may be orphaned by the TMF; + * or if the TMF failed, they may be in an indeterminate state. + * So, continue on. + * We will report success if all the i/o aborts successfully. + */ + if (status == SUCCESS) + status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, + LPFC_CTX_LUN); + + return status; +} + +/** + * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine does a target reset by sending a TARGET_RESET task management + * command. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_target_reset_handler(struct scsi_cmnd *cmnd) +{ + struct Scsi_Host *shost = cmnd->device->host; + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; + struct lpfc_rport_data *rdata; + struct lpfc_nodelist *pnode; + unsigned tgt_id = cmnd->device->id; + uint64_t lun_id = cmnd->device->lun; + struct lpfc_scsi_event_header scsi_event; + int status; + u32 logit = LOG_FCP; + u32 dev_loss_tmo = vport->cfg_devloss_tmo; + unsigned long flags; + DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); + + if (!rport) + return FAILED; + + rdata = rport->dd_data; + if (!rdata || !rdata->pnode) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0799 Target Reset rdata failure: rdata x%px\n", + rdata); + return FAILED; + } + pnode = rdata->pnode; + status = fc_block_rport(rport); + if (status != 0 && status != SUCCESS) + return status; + + status = lpfc_chk_tgt_mapped(vport, rport); + if (status == FAILED) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0722 Target Reset rport failure: rdata x%px\n", rdata); + if (pnode) { + spin_lock_irqsave(&pnode->lock, flags); + pnode->nlp_flag &= ~NLP_NPR_ADISC; + pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE; + spin_unlock_irqrestore(&pnode->lock, flags); + } + lpfc_reset_flush_io_context(vport, tgt_id, lun_id, + LPFC_CTX_TGT); + return FAST_IO_FAIL; + } + + scsi_event.event_type = FC_REG_SCSI_EVENT; + scsi_event.subcategory = LPFC_EVENT_TGTRESET; + scsi_event.lun = 0; + memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); + memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); + + fc_host_post_vendor_event(shost, fc_get_event_number(), + sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); + + status = lpfc_send_taskmgmt(vport, rport, tgt_id, lun_id, + FCP_TARGET_RESET); + if (status != SUCCESS) { + logit = LOG_TRACE_EVENT; + + /* Issue LOGO, if no LOGO is outstanding */ + spin_lock_irqsave(&pnode->lock, flags); + if (!(pnode->save_flags & NLP_WAIT_FOR_LOGO) && + !pnode->logo_waitq) { + pnode->logo_waitq = &waitq; + pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE; + pnode->nlp_flag |= NLP_ISSUE_LOGO; + pnode->save_flags |= NLP_WAIT_FOR_LOGO; + spin_unlock_irqrestore(&pnode->lock, flags); + lpfc_unreg_rpi(vport, pnode); + wait_event_timeout(waitq, + (!(pnode->save_flags & + NLP_WAIT_FOR_LOGO)), + msecs_to_jiffies(dev_loss_tmo * + 1000)); + + if (pnode->save_flags & NLP_WAIT_FOR_LOGO) { + lpfc_printf_vlog(vport, KERN_ERR, logit, + "0725 SCSI layer TGTRST " + "failed & LOGO TMO (%d, %llu) " + "return x%x\n", + tgt_id, lun_id, status); + spin_lock_irqsave(&pnode->lock, flags); + pnode->save_flags &= ~NLP_WAIT_FOR_LOGO; + } else { + spin_lock_irqsave(&pnode->lock, flags); + } + pnode->logo_waitq = NULL; + spin_unlock_irqrestore(&pnode->lock, flags); + status = SUCCESS; + + } else { + spin_unlock_irqrestore(&pnode->lock, flags); + status = FAILED; + } + } + + lpfc_printf_vlog(vport, KERN_ERR, logit, + "0723 SCSI layer issued Target Reset (%d, %llu) " + "return x%x\n", tgt_id, lun_id, status); + + /* + * We have to clean up i/o as : they may be orphaned by the TMF; + * or if the TMF failed, they may be in an indeterminate state. + * So, continue on. + * We will report success if all the i/o aborts successfully. + */ + if (status == SUCCESS) + status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, + LPFC_CTX_TGT); + return status; +} + +/** + * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine does host reset to the adaptor port. It brings the HBA + * offline, performs a board restart, and then brings the board back online. + * The lpfc_offline calls lpfc_sli_hba_down which will abort and local + * reject all outstanding SCSI commands to the host and error returned + * back to SCSI mid-level. As this will be SCSI mid-level's last resort + * of error handling, it will only return error if resetting of the adapter + * is not successful; in all other cases, will return success. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ +static int +lpfc_host_reset_handler(struct scsi_cmnd *cmnd) +{ + struct Scsi_Host *shost = cmnd->device->host; + struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; + struct lpfc_hba *phba = vport->phba; + int rc, ret = SUCCESS; + + lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, + "3172 SCSI layer issued Host Reset Data:\n"); + + lpfc_offline_prep(phba, LPFC_MBX_WAIT); + lpfc_offline(phba); + rc = lpfc_sli_brdrestart(phba); + if (rc) + goto error; + + /* Wait for successful restart of adapter */ + if (phba->sli_rev < LPFC_SLI_REV4) { + rc = lpfc_sli_chipset_init(phba); + if (rc) + goto error; + } + + rc = lpfc_online(phba); + if (rc) + goto error; + + lpfc_unblock_mgmt_io(phba); + + return ret; +error: + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "3323 Failed host reset\n"); + lpfc_unblock_mgmt_io(phba); + return FAILED; +} + +/** + * lpfc_slave_alloc - scsi_host_template slave_alloc entry point + * @sdev: Pointer to scsi_device. + * + * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's + * globally available list of scsi buffers. This routine also makes sure scsi + * buffer is not allocated more than HBA limit conveyed to midlayer. This list + * of scsi buffer exists for the lifetime of the driver. + * + * Return codes: + * non-0 - Error + * 0 - Success + **/ +static int +lpfc_slave_alloc(struct scsi_device *sdev) +{ + struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; + struct lpfc_hba *phba = vport->phba; + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + uint32_t total = 0; + uint32_t num_to_alloc = 0; + int num_allocated = 0; + uint32_t sdev_cnt; + struct lpfc_device_data *device_data; + unsigned long flags; + struct lpfc_name target_wwpn; + + if (!rport || fc_remote_port_chkready(rport)) + return -ENXIO; + + if (phba->cfg_fof) { + + /* + * Check to see if the device data structure for the lun + * exists. If not, create one. + */ + + u64_to_wwn(rport->port_name, target_wwpn.u.wwn); + spin_lock_irqsave(&phba->devicelock, flags); + device_data = __lpfc_get_device_data(phba, + &phba->luns, + &vport->fc_portname, + &target_wwpn, + sdev->lun); + if (!device_data) { + spin_unlock_irqrestore(&phba->devicelock, flags); + device_data = lpfc_create_device_data(phba, + &vport->fc_portname, + &target_wwpn, + sdev->lun, + phba->cfg_XLanePriority, + true); + if (!device_data) + return -ENOMEM; + spin_lock_irqsave(&phba->devicelock, flags); + list_add_tail(&device_data->listentry, &phba->luns); + } + device_data->rport_data = rport->dd_data; + device_data->available = true; + spin_unlock_irqrestore(&phba->devicelock, flags); + sdev->hostdata = device_data; + } else { + sdev->hostdata = rport->dd_data; + } + sdev_cnt = atomic_inc_return(&phba->sdev_cnt); + + /* For SLI4, all IO buffers are pre-allocated */ + if (phba->sli_rev == LPFC_SLI_REV4) + return 0; + + /* This code path is now ONLY for SLI3 adapters */ + + /* + * Populate the cmds_per_lun count scsi_bufs into this host's globally + * available list of scsi buffers. Don't allocate more than the + * HBA limit conveyed to the midlayer via the host structure. The + * formula accounts for the lun_queue_depth + error handlers + 1 + * extra. This list of scsi bufs exists for the lifetime of the driver. + */ + total = phba->total_scsi_bufs; + num_to_alloc = vport->cfg_lun_queue_depth + 2; + + /* If allocated buffers are enough do nothing */ + if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) + return 0; + + /* Allow some exchanges to be available always to complete discovery */ + if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "0704 At limitation of %d preallocated " + "command buffers\n", total); + return 0; + /* Allow some exchanges to be available always to complete discovery */ + } else if (total + num_to_alloc > + phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, + "0705 Allocation request of %d " + "command buffers will exceed max of %d. " + "Reducing allocation request to %d.\n", + num_to_alloc, phba->cfg_hba_queue_depth, + (phba->cfg_hba_queue_depth - total)); + num_to_alloc = phba->cfg_hba_queue_depth - total; + } + num_allocated = lpfc_new_scsi_buf_s3(vport, num_to_alloc); + if (num_to_alloc != num_allocated) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, + "0708 Allocation request of %d " + "command buffers did not succeed. " + "Allocated %d buffers.\n", + num_to_alloc, num_allocated); + } + if (num_allocated > 0) + phba->total_scsi_bufs += num_allocated; + return 0; +} + +/** + * lpfc_slave_configure - scsi_host_template slave_configure entry point + * @sdev: Pointer to scsi_device. + * + * This routine configures following items + * - Tag command queuing support for @sdev if supported. + * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. + * + * Return codes: + * 0 - Success + **/ +static int +lpfc_slave_configure(struct scsi_device *sdev) +{ + struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; + struct lpfc_hba *phba = vport->phba; + + scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth); + + if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { + lpfc_sli_handle_fast_ring_event(phba, + &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_poll_rearm_timer(phba); + } + + return 0; +} + +/** + * lpfc_slave_destroy - slave_destroy entry point of SHT data structure + * @sdev: Pointer to scsi_device. + * + * This routine sets @sdev hostatdata filed to null. + **/ +static void +lpfc_slave_destroy(struct scsi_device *sdev) +{ + struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; + struct lpfc_hba *phba = vport->phba; + unsigned long flags; + struct lpfc_device_data *device_data = sdev->hostdata; + + atomic_dec(&phba->sdev_cnt); + if ((phba->cfg_fof) && (device_data)) { + spin_lock_irqsave(&phba->devicelock, flags); + device_data->available = false; + if (!device_data->oas_enabled) + lpfc_delete_device_data(phba, device_data); + spin_unlock_irqrestore(&phba->devicelock, flags); + } + sdev->hostdata = NULL; + return; +} + +/** + * lpfc_create_device_data - creates and initializes device data structure for OAS + * @phba: Pointer to host bus adapter structure. + * @vport_wwpn: Pointer to vport's wwpn information + * @target_wwpn: Pointer to target's wwpn information + * @lun: Lun on target + * @pri: Priority + * @atomic_create: Flag to indicate if memory should be allocated using the + * GFP_ATOMIC flag or not. + * + * This routine creates a device data structure which will contain identifying + * information for the device (host wwpn, target wwpn, lun), state of OAS, + * whether or not the corresponding lun is available by the system, + * and pointer to the rport data. + * + * Return codes: + * NULL - Error + * Pointer to lpfc_device_data - Success + **/ +struct lpfc_device_data* +lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, + struct lpfc_name *target_wwpn, uint64_t lun, + uint32_t pri, bool atomic_create) +{ + + struct lpfc_device_data *lun_info; + int memory_flags; + + if (unlikely(!phba) || !vport_wwpn || !target_wwpn || + !(phba->cfg_fof)) + return NULL; + + /* Attempt to create the device data to contain lun info */ + + if (atomic_create) + memory_flags = GFP_ATOMIC; + else + memory_flags = GFP_KERNEL; + lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags); + if (!lun_info) + return NULL; + INIT_LIST_HEAD(&lun_info->listentry); + lun_info->rport_data = NULL; + memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn, + sizeof(struct lpfc_name)); + memcpy(&lun_info->device_id.target_wwpn, target_wwpn, + sizeof(struct lpfc_name)); + lun_info->device_id.lun = lun; + lun_info->oas_enabled = false; + lun_info->priority = pri; + lun_info->available = false; + return lun_info; +} + +/** + * lpfc_delete_device_data - frees a device data structure for OAS + * @phba: Pointer to host bus adapter structure. + * @lun_info: Pointer to device data structure to free. + * + * This routine frees the previously allocated device data structure passed. + * + **/ +void +lpfc_delete_device_data(struct lpfc_hba *phba, + struct lpfc_device_data *lun_info) +{ + + if (unlikely(!phba) || !lun_info || + !(phba->cfg_fof)) + return; + + if (!list_empty(&lun_info->listentry)) + list_del(&lun_info->listentry); + mempool_free(lun_info, phba->device_data_mem_pool); + return; +} + +/** + * __lpfc_get_device_data - returns the device data for the specified lun + * @phba: Pointer to host bus adapter structure. + * @list: Point to list to search. + * @vport_wwpn: Pointer to vport's wwpn information + * @target_wwpn: Pointer to target's wwpn information + * @lun: Lun on target + * + * This routine searches the list passed for the specified lun's device data. + * This function does not hold locks, it is the responsibility of the caller + * to ensure the proper lock is held before calling the function. + * + * Return codes: + * NULL - Error + * Pointer to lpfc_device_data - Success + **/ +struct lpfc_device_data* +__lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list, + struct lpfc_name *vport_wwpn, + struct lpfc_name *target_wwpn, uint64_t lun) +{ + + struct lpfc_device_data *lun_info; + + if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn || + !phba->cfg_fof) + return NULL; + + /* Check to see if the lun is already enabled for OAS. */ + + list_for_each_entry(lun_info, list, listentry) { + if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, + sizeof(struct lpfc_name)) == 0) && + (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, + sizeof(struct lpfc_name)) == 0) && + (lun_info->device_id.lun == lun)) + return lun_info; + } + + return NULL; +} + +/** + * lpfc_find_next_oas_lun - searches for the next oas lun + * @phba: Pointer to host bus adapter structure. + * @vport_wwpn: Pointer to vport's wwpn information + * @target_wwpn: Pointer to target's wwpn information + * @starting_lun: Pointer to the lun to start searching for + * @found_vport_wwpn: Pointer to the found lun's vport wwpn information + * @found_target_wwpn: Pointer to the found lun's target wwpn information + * @found_lun: Pointer to the found lun. + * @found_lun_status: Pointer to status of the found lun. + * @found_lun_pri: Pointer to priority of the found lun. + * + * This routine searches the luns list for the specified lun + * or the first lun for the vport/target. If the vport wwpn contains + * a zero value then a specific vport is not specified. In this case + * any vport which contains the lun will be considered a match. If the + * target wwpn contains a zero value then a specific target is not specified. + * In this case any target which contains the lun will be considered a + * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status + * are returned. The function will also return the next lun if available. + * If the next lun is not found, starting_lun parameter will be set to + * NO_MORE_OAS_LUN. + * + * Return codes: + * non-0 - Error + * 0 - Success + **/ +bool +lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, + struct lpfc_name *target_wwpn, uint64_t *starting_lun, + struct lpfc_name *found_vport_wwpn, + struct lpfc_name *found_target_wwpn, + uint64_t *found_lun, + uint32_t *found_lun_status, + uint32_t *found_lun_pri) +{ + + unsigned long flags; + struct lpfc_device_data *lun_info; + struct lpfc_device_id *device_id; + uint64_t lun; + bool found = false; + + if (unlikely(!phba) || !vport_wwpn || !target_wwpn || + !starting_lun || !found_vport_wwpn || + !found_target_wwpn || !found_lun || !found_lun_status || + (*starting_lun == NO_MORE_OAS_LUN) || + !phba->cfg_fof) + return false; + + lun = *starting_lun; + *found_lun = NO_MORE_OAS_LUN; + *starting_lun = NO_MORE_OAS_LUN; + + /* Search for lun or the lun closet in value */ + + spin_lock_irqsave(&phba->devicelock, flags); + list_for_each_entry(lun_info, &phba->luns, listentry) { + if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) || + (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, + sizeof(struct lpfc_name)) == 0)) && + ((wwn_to_u64(target_wwpn->u.wwn) == 0) || + (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, + sizeof(struct lpfc_name)) == 0)) && + (lun_info->oas_enabled)) { + device_id = &lun_info->device_id; + if ((!found) && + ((lun == FIND_FIRST_OAS_LUN) || + (device_id->lun == lun))) { + *found_lun = device_id->lun; + memcpy(found_vport_wwpn, + &device_id->vport_wwpn, + sizeof(struct lpfc_name)); + memcpy(found_target_wwpn, + &device_id->target_wwpn, + sizeof(struct lpfc_name)); + if (lun_info->available) + *found_lun_status = + OAS_LUN_STATUS_EXISTS; + else + *found_lun_status = 0; + *found_lun_pri = lun_info->priority; + if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT) + memset(vport_wwpn, 0x0, + sizeof(struct lpfc_name)); + if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET) + memset(target_wwpn, 0x0, + sizeof(struct lpfc_name)); + found = true; + } else if (found) { + *starting_lun = device_id->lun; + memcpy(vport_wwpn, &device_id->vport_wwpn, + sizeof(struct lpfc_name)); + memcpy(target_wwpn, &device_id->target_wwpn, + sizeof(struct lpfc_name)); + break; + } + } + } + spin_unlock_irqrestore(&phba->devicelock, flags); + return found; +} + +/** + * lpfc_enable_oas_lun - enables a lun for OAS operations + * @phba: Pointer to host bus adapter structure. + * @vport_wwpn: Pointer to vport's wwpn information + * @target_wwpn: Pointer to target's wwpn information + * @lun: Lun + * @pri: Priority + * + * This routine enables a lun for oas operations. The routines does so by + * doing the following : + * + * 1) Checks to see if the device data for the lun has been created. + * 2) If found, sets the OAS enabled flag if not set and returns. + * 3) Otherwise, creates a device data structure. + * 4) If successfully created, indicates the device data is for an OAS lun, + * indicates the lun is not available and add to the list of luns. + * + * Return codes: + * false - Error + * true - Success + **/ +bool +lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, + struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri) +{ + + struct lpfc_device_data *lun_info; + unsigned long flags; + + if (unlikely(!phba) || !vport_wwpn || !target_wwpn || + !phba->cfg_fof) + return false; + + spin_lock_irqsave(&phba->devicelock, flags); + + /* Check to see if the device data for the lun has been created */ + lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn, + target_wwpn, lun); + if (lun_info) { + if (!lun_info->oas_enabled) + lun_info->oas_enabled = true; + lun_info->priority = pri; + spin_unlock_irqrestore(&phba->devicelock, flags); + return true; + } + + /* Create an lun info structure and add to list of luns */ + lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun, + pri, true); + if (lun_info) { + lun_info->oas_enabled = true; + lun_info->priority = pri; + lun_info->available = false; + list_add_tail(&lun_info->listentry, &phba->luns); + spin_unlock_irqrestore(&phba->devicelock, flags); + return true; + } + spin_unlock_irqrestore(&phba->devicelock, flags); + return false; +} + +/** + * lpfc_disable_oas_lun - disables a lun for OAS operations + * @phba: Pointer to host bus adapter structure. + * @vport_wwpn: Pointer to vport's wwpn information + * @target_wwpn: Pointer to target's wwpn information + * @lun: Lun + * @pri: Priority + * + * This routine disables a lun for oas operations. The routines does so by + * doing the following : + * + * 1) Checks to see if the device data for the lun is created. + * 2) If present, clears the flag indicating this lun is for OAS. + * 3) If the lun is not available by the system, the device data is + * freed. + * + * Return codes: + * false - Error + * true - Success + **/ +bool +lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, + struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri) +{ + + struct lpfc_device_data *lun_info; + unsigned long flags; + + if (unlikely(!phba) || !vport_wwpn || !target_wwpn || + !phba->cfg_fof) + return false; + + spin_lock_irqsave(&phba->devicelock, flags); + + /* Check to see if the lun is available. */ + lun_info = __lpfc_get_device_data(phba, + &phba->luns, vport_wwpn, + target_wwpn, lun); + if (lun_info) { + lun_info->oas_enabled = false; + lun_info->priority = pri; + if (!lun_info->available) + lpfc_delete_device_data(phba, lun_info); + spin_unlock_irqrestore(&phba->devicelock, flags); + return true; + } + + spin_unlock_irqrestore(&phba->devicelock, flags); + return false; +} + +static int +lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) +{ + return SCSI_MLQUEUE_HOST_BUSY; +} + +static int +lpfc_no_slave(struct scsi_device *sdev) +{ + return -ENODEV; +} + +struct scsi_host_template lpfc_template_nvme = { + .module = THIS_MODULE, + .name = LPFC_DRIVER_NAME, + .proc_name = LPFC_DRIVER_NAME, + .info = lpfc_info, + .queuecommand = lpfc_no_command, + .slave_alloc = lpfc_no_slave, + .slave_configure = lpfc_no_slave, + .scan_finished = lpfc_scan_finished, + .this_id = -1, + .sg_tablesize = 1, + .cmd_per_lun = 1, + .shost_groups = lpfc_hba_groups, + .max_sectors = 0xFFFFFFFF, + .vendor_id = LPFC_NL_VENDOR_ID, + .track_queue_depth = 0, +}; + +struct scsi_host_template lpfc_template = { + .module = THIS_MODULE, + .name = LPFC_DRIVER_NAME, + .proc_name = LPFC_DRIVER_NAME, + .info = lpfc_info, + .queuecommand = lpfc_queuecommand, + .eh_timed_out = fc_eh_timed_out, + .eh_should_retry_cmd = fc_eh_should_retry_cmd, + .eh_abort_handler = lpfc_abort_handler, + .eh_device_reset_handler = lpfc_device_reset_handler, + .eh_target_reset_handler = lpfc_target_reset_handler, + .eh_host_reset_handler = lpfc_host_reset_handler, + .slave_alloc = lpfc_slave_alloc, + .slave_configure = lpfc_slave_configure, + .slave_destroy = lpfc_slave_destroy, + .scan_finished = lpfc_scan_finished, + .this_id = -1, + .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, + .cmd_per_lun = LPFC_CMD_PER_LUN, + .shost_groups = lpfc_hba_groups, + .max_sectors = 0xFFFFFFFF, + .vendor_id = LPFC_NL_VENDOR_ID, + .change_queue_depth = scsi_change_queue_depth, + .track_queue_depth = 1, +}; + +struct scsi_host_template lpfc_vport_template = { + .module = THIS_MODULE, + .name = LPFC_DRIVER_NAME, + .proc_name = LPFC_DRIVER_NAME, + .info = lpfc_info, + .queuecommand = lpfc_queuecommand, + .eh_timed_out = fc_eh_timed_out, + .eh_should_retry_cmd = fc_eh_should_retry_cmd, + .eh_abort_handler = lpfc_abort_handler, + .eh_device_reset_handler = lpfc_device_reset_handler, + .eh_target_reset_handler = lpfc_target_reset_handler, + .eh_bus_reset_handler = NULL, + .eh_host_reset_handler = NULL, + .slave_alloc = lpfc_slave_alloc, + .slave_configure = lpfc_slave_configure, + .slave_destroy = lpfc_slave_destroy, + .scan_finished = lpfc_scan_finished, + .this_id = -1, + .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, + .cmd_per_lun = LPFC_CMD_PER_LUN, + .shost_groups = lpfc_vport_groups, + .max_sectors = 0xFFFFFFFF, + .vendor_id = 0, + .change_queue_depth = scsi_change_queue_depth, + .track_queue_depth = 1, +}; |